Initial impressions and bench testing of the Brother Hobby EngineerX 2307 2700 kv motor

Hi Everyone -

I recently completed a bench test session of another quad racing motor I picked up to evaluate, the BrotherHobby EngineerX 2307 2700 kv that I picked up from Banggood.  I picked mine up for $23.99 USD, I notice the regular price from Banggood is $30.67, although at the time of writing this blog post it is on sale for the same price I paid.

I discovered this motor watching EngineerX's YouTube channel, here is his test video of this motor before it was released to the public.

I was very pleased to be able to exchange a few words with him about this new motor.  He mentioned that it might not be for all out speed, but perhaps very good torque.  If you want more details about the "guts" of the motor, please watch his video as he takes it apart and shows the details of the motor.

Mine weighed 34 gr/1.2 oz out of the box, it comes with the standard bolts and a prop nut, the finish is very nice and it spins very smoothly.

With the prop and other hardware attached ready to go in the plane, it weighs 48 gr/1.7 oz which I think is very good for a 2307 motor, it is right there with all the 2306 size motors I have tested thus far.

I started off the bench testing with the 6x4 APC gas prop, you can read all the test numbers on the motor test spreadsheet which also has links to all the components used in the testing.  The thrust numbers were not that great, but the amps numbers were noticeably low, so I tested with the 6x4 KMP props and finally the Gemfan 6045 carbon nylon prop which is what I will field test it with initially on 3S.

Here are the test numbers for this motor on 3S using the GF 6045 prop and the Turnigy AE-45A ESC with custom settings of 22.5 degrees timing and 24 KHz PWM frequency.

50% throttle - 15.7A/192.3W producing 635 gr/22.4 oz of thrust;

100% throttle - 39.4A/451.3W producing 1200 gr/42.3 oz of thrust.

So I am excited to get to the field and test it, my experience has been that with the GF 6045 CN prop, the bench numbers normally carry over well to the field😊

Park Jet noise...the "other" sound of freedom😎

Cheers,

Scott

Initial impressions and testing of the EaglePower SA2306 2888 kv motor - I bought a ticket on the "hype train"

Hi Everyone -

I fully admit sometimes that I see big kv numbers and get starry eyed thinking they will be the best and fastest motors I have ever tested😳.  That is kind of the case with the EaglePower SA2306 2888 kv motor I recently purchased from Banggood.  Regular price for this motor is listed as $21.99 USD, fortunately I picked mine up on sale for $16.49, so the fact it isn't quite what I expected, that takes a bit of the sting out of it😉

However, compared to the DYS Samguk Shu which really turned out to be a dud, I think I might be able to salvage some performance from this EaglePower motor😀  As you can see, it comes with one prop nut and a set of bolts.  Although I expected my prop nut to thread on clockwise, it ended up being a counter clockwise shaft and nut, so I better not lose it😟

This is another "naked bottom" motor, so pretty light, without any hardware, it weighs 28 gr/1.0 oz.

Some more pictures of the motor.

The motor wires are 150mm/5.9" long.  The air gap between the stator and the magnets is fairly tight, however the motor does not spin all that freely by hand, it feels like the magnets are very strong however, so once I get flying it, we will see if the bearings are reasonable.  The Banggood site provides very little information on the motor other than it is supposedly rated for 45A.

It has a 16x19 mm bolt pattern on the bottom, so fits the "X" mount for park jet just fine.  You can see it also uses a small hex bolt to hold the shaft to the motor, but it does not come with a spare.

With the prop, hardware, etc, the motor weighs 46 gr/1.6 oz ready to go in the plane. 

I started testing with the 6x4 APC gas prop and right away was disappointed by the numbers, thinking I might have another dud on my hands.  Here are the best numbers with the 6x4 APC gas prop, Turnigy AE-45A ESC with custom settings of 22.5 degrees timing and 24 KHz PWM frequency on 3S.  I didn't list this on the motor test spreadsheet, but did put all the numbers for the Gemfan 6045 carbon nylon prop which I will be using with this motor for initial field testing.

50% throttle - 12.5A/152.1W producing 515 gr/18.2 oz of thrust;

100% throttle - 33.8A/415.4W producing 960 gr/33.9 oz of thrust.

As mentioned, I was disappointed when I saw those numbers, but compared to the Samguk Shu motor, the amp draw was still pretty low and with it being rated as a 45A motor, I decided to try another prop.  Here are the best numbers with the Gemfan 6045 carbon nylon prop again with the Turnigy AE-45A ESC with the custom settings mentioned above on 3S.

50% throttle - 13.4A/163.6W producing 585 gr/20.6 oz of thrust;

100% throttle - 32.6A/377.3W producing 1110 gr/39.2 oz of thrust.

So needless to say, I will give it a go and field test it with the Turnigy AE-45A ESC and the GF 6045 CN prop, more testing to follow😊

Park Jet noise...the "other" sound of freedom😎

Cheers,

Scott

Initial post flight report GepRC GR2306 2750 kv motor

Hi Everyone -

Just back from the field blasting 12 flights through my new GepRC GR2306 2750 Kv motor😀  You can read more about my initial impressions and bench testing of this motor at this blog post.

From what I saw today, this motor paired with the 6x3 EMP prop using the Turnigy AE-45A ESC with custom settings of 22.5 degrees on the timing and 24 KHz PWM frequency is the new "king" of the quad racing motors I have tested thus far in my park jets.👍

Here is some video of one of today's flights.  It definitely has much more power mid range, I had to be careful with how much I advanced the throttle when launching or it would want to rip it out of my hand!😲  Normally with most motor setups I launch at around 60% throttle, with this motor I had to back that off to about 50% throttle to feel like I could still hang on to the plane.

I also flew the EMAX RS2306 2750 kv motor with the 6x3 EMP prop today and overall, the GepRC has more mid range power and top end speed.  Not as noticeable an increase in top end speed, but definitely at mid range between about 50-75% throttle.  In fact, I would estimate I would be able to reduce the throws down a bit more the plane moves along so fast at mid range, just so I could keep up with the plane.😊

I pushed it hard for 12 flights and it ran smooth and strong the whole time, no hesitation no matter how hard I slammed the throttle around.  Although it was a cool day, temps got up to about 12 C/54 F, the motor and ESC ran very cool, barely any noticeable heat build up at all, so I think even in warmer weather, this setup would run just fine.

Very impressed with this motor and it's performance today, I may have to order another one to have a couple of serious speed setups😉

Park Jet noise...the "other" sound of freedom😎

Cheers,

Scott

Initial impressions and bench testing of the GepRC GR2306 2750 kv motor

Hi Everyone -

I received this GepRC GR2306 2750 kv motor in the mail yesterday and managed to get some bench testing done today😀

As you can see above, it comes with one prop nut and two sets of M3 screws, one set 7mm long and the other 8mm long.  Without any hardware, the motor weighs 32 gr/1.1 oz.  The motor wires are 150mm/5.9" long.

It has a hollow shaft and fairly minimal metal on the top.  According to the Banggood write up in the link above, it is made with 7075 aluminum.  The shaft is hollow all the way through.

It has curved N52 grade magnets which are one of the best grades of magnets used in brushless motors, it has a nice cut out as you can see in the bottom for the wires to be protected.  It is a "naked bottom" motor with no full base plate as you find on a lot of motors.  The gap between the stator and the magnets is very tight and when the motor is spun by hand, it spins smoothly, but the magnets feel very strong.  The shaft is held on with a small hex bolt, however it does not come with a spare like some other motors I have tested.

The bolt pattern is 16x16 mm, so I will only be able to use two screws to hold the "X" mount to the motor, but I think that will be sufficient.

With the prop and all the other hardware needed to put in a park jet, the motor weighs 48 gr/1.7 oz.

I tested the motor with both the 6x4 APC gas prop and the 6x3 EMP prop with the Turnigy Plush, Turnigy AE-45A ESC and Hobby Wing Platinum PRO 40A ESCs.  You can read the complete details as well as find links to all the components on the motor test spreadsheet.  The numbers are all on 3S.  Again, this motor preferred the Turnigy AE-45A ESC with custom settings of 22.5 degrees timing and 24 KHz for both props.  According to the Banggood specs, this is a 45A motor.

Based on the numbers alone, I think this motor might push the EMAX RS2306 2750 Kv motor out of the top spot for motors I have tested thus far.  

Here are the best numbers for the GepRC GR2306 2750 kv motor with the 6x4 APC gas prop.

50% throttle - 19.9A/238.0W producing 685 gr/24.2 oz of thrust;

100% throttle - 45.0A/506.3 producing 1115 gr/39.3 oz of thrust.

These are the best numbers I have seen for any of the motors I have tested thus far with the 6x4 APC gas prop, although it is a bit amp hungry.  Based on experience, I would fly this motor with the 6x4 APC gas prop and the Turnigy AE-45A ESC, although it would be pushing the ESC especially hard.

Here are the best numbers for the GepRC GR2306 2750 kv motor with the 6x3 EMP prop and Turnigy AE-45A ESC.

50% throttle - 18.9A/225.8W producing 730 gr/25.7 oz of thrust;

100% throttle - 41.7A/478.2W producing 1290 gr/45.5 oz of thrust.

Wow😁😲  This is the first motor I have seen that produced over 700 gr of thrust at mid throttle, incredible!  I won't bother fooling around, the flight test will be with the 6x3 EMP prop and the Turnigy AE-45A ESC😉  Excited to get it out for a spin very soon😁

Park Jet noise...the "other" sound of freedom😎

Cheers,

Scott

Initial impressions and bench testing of the Hawksky AT2306 II 2750 Kv motor

Hi Everyone -

I received my Hawksky AT2306 II 2750 Kv motor in the mail today😀  I picked mine up from Banggood, $22.37 USD, took about 4 weeks to get here with free shipping.

It comes complete with 4 mounting bolts that you would use to mount in on a quad or anything I suppose as well as one prop nut, no bullet connectors as you can see above.  It is pretty light, the motor wires are 90 mm long and with no hardware, the motor weighs 30 gr/1.1 oz.

It has a "naked bottom", so no actual full base plate.  Bolt pattern is 16x19 mm, so the same as a standard "X" mount for use in a park jet.

The Banggood website has very little info on the magnets, etc, they do look curved, a pretty tight tolerance between the magnets and stator.  The bell spins freely, but I can feel that the magnets are pretty strong.  Not sure how many windings it has, the wire is quite thick compared to some other motors of this size I have tested.  As you can see, to remove the shaft, there is a small hex bolt rather than a "C" clip, although it does not come with spare bolt like some other motors I have tested.

The outside of the bell has very small ridges, I am not sure if this is to help with motor cooling.  It is available in green like the base is shown above or all silver like I went for and is also available in 2500 Kv (same price though😉)

With the prop and all other hardware it weighs 44 gr/1.6 oz which is pretty light, about the lightest motor of this size I have tested by about 4 gr.

Bench testing

You can go straight to the motor test spreadsheet for the full details if you would like, I'll touch on some highlights below.  I tested it initially with the 6x4 APC gas prop and the full throttle amp draw was quite high ranging from 43.9 to 47.7A depending on the ESC and the thrust numbers were a bit disappointing compared to other motors of the same size and Kv.  I probably would not fly with the 6x4 APC gas prop as the amp draw would be pushing the ESCs past their base rated limit in all three cases.

So I decided to "prop down" and ran the same tests with the 6x3 EMP prop from RC Timer.  Here are the best numbers using the Turnigy AE-45A ESC with custom settings of 22.5 degrees timing and 24 KHz PWM frequency using a Gens Ace 2200 3S 45C battery.

50% throttle - 17.6A/217.5W producing 646 gr/22.8 oz of thrust;

100% throttle - 42.3A/485.1W producing 1215 gr/42.9 oz of thrust.

So for initial field testing, I will use the 6x3 EMP prop and the Turnigy Plush 40A ESC for consistency.  Even with the Turnigy Plush on default settings the results were quite good with the 6x3 EMP prop.

50% throttle - 17.3A/211.5W producing 624 gr/22 oz of thrust;

100% throttle - 39.7A/451.6W producing 1155 gr/40.7 oz of thrust.

As I continue to fill out my spreadsheet, I will go back and test several of the other 2700+ Kv props with the 6x3 EMP prop to see the results.

Park Jet noise...the "other" sound of freedom 😎

Cheers,

Scott

Field test of the Racerstar BR2406 2600 kv motor with Gemfan 6045 carbon nylon prop on 3S

Hi Everyone -

I had this little beauty out today field testing the Gemfan 6045 carbon nylon prop as recommended to me by rcplanepirate😀

Today I was running it on the Racerstar BR2406 2600 kv motor which showed incredibly good numbers during bench testing with this prop. 

You can read more details on the bench testing of this motor and a couple others including the park jet workhorse 2212/6 2200 kv motor at this blog post.

Here is the flight video of today's test session.

I am a very happy park jet pilot after seeing that the field test performance lived up to the bench testing or vice versa😉

This prop really wakes this motor up compared to the previous best setup with the 6x4 APC gas prop which I suppose you would expect with a bit of extra pitch, a stiffer prop and slightly different blade design.

This motor with this prop and ESC setup on 3S is now up in the same category of some of the 2700+ kv motors I have been running.  I am very pleased with how it runs and is actually quite efficient when I look at the amp draw compared to some of the 2700+ kv motors.  To get 1070 gr/37.7 oz of thrust at the cost of only 35.3A is a great setup and even though it was quite cool today, I think this motor and prop combo could be run pretty hard even in the hot summer months without issue.

Thanks again to rcplanepirate for the recommendation, please check out his YouTube channel for lots of great testing, educational and flying videos of some seriously fast planes😀

Park Jet noise...the "other" sound of freedom😎

Cheers,

Scott

Gemfan 6045 carbon nylon props initial impressions and testing

Hi Everyone -

I received a couple of packs of Gemfan 6045 carbon nylon props in the mail in the last couple days😀  I tested them today on the 2212/6 2200 kv, Racerstar BR2406 2600 kv and RC Timer FR2306 2650 kv motors.  If you want to skip straight to the test numbers, you can go to my motor test spreadsheet.

As these props were designed for quads, they come four to a pack, two of each rotation.  Lots of prop rings including ones that fit on most park jet motor shafts.  Not a bad deal for $3.79 USD.

The props are quite light, it was hard for my less than accurate kitchen scale to get a good result, but I'm sure they weigh about 4 gr each, the same as a 6x4 APC gas prop, so pretty light.  rcplanepirate has already tested some of these on the bench with very good results.  After watching his tests and having a couple discussions with him, I thought I would pick some up to help boost some more power out of the lower Kv (less than 2700) motors I am currently using.  I figured the little bit of extra pitch with a stiff prop should hopefully give more power at lower RPM and hopefully not drive the amp draw up too high.

Please check out RCPP's YouTube channel, tons of great test and educational info.😀

These props are very stiff, even stiffer than the 6x4 APC gas props, but I am a bit concerned they might be a bit brittle, or perhaps this was just one prop.  As I was trying to get a grip on one of the quad racing motors I tested today to tighten the prop nut, I must have pushed against the prop blade a bit too firmly and it broke cleanly almost right at the hub as you can see below.😒

I compared it's length to the 6x4 APC gas prop and it is 3/16" longer as you can see in this picture below.

There is also a bit more prop blade surface area as you can probably see in the picture above and below.

I know it might be hard to see in these following pictures, the blade thickness seems to be a bit thinner on the Gemfan prop and the pitch is not as aggressive at the hub compared to the 6x4 APC.

The prop blade also seems to have a bit more of a curve or "under camber"(?) compared to the 6x4 APC.  Due to the blade shape and it's stiffness, it is certainly as quiet as the 6x4 APC and again while difficult perhaps to see in this pictures, I can definitely see the increase in pitch down the length of the blade.

Test results discussion

The biggest improvement in power with this prop showed up in the 2212/6 2200 kv motor which is the most popular park jet motor around currently and the Racerstar BR2406 2600 kv.  There was a noticeable increase of mid range power with the RC Timer FR2306 2650 kv motor, but not a big increase in top end, although it did break 1000 gr of thrust on the bench with all three motors which always gets my attention😉  I will focus mostly on the 2212 2200  and Racerstar motors for the rest of the discussion.  I have found in field testing that the RC Timer motor doesn't quite have the torque to continue pushing good power to the top of the throttle range compared to the other two.

I tested all the motors with both the Turnigy Plush 40A and Turnigy AE-45A ESCs (links for these are on the spreadsheet linked in the first paragraph).  For the Plush, everything was left at factory default.  For the AE-45 I used different settings depending on the motor based on experience from my previous testing.  Below I am listing what I think would be the best setup for each motor.  Gens Ace 2200 3S 45C batteries were used for all the testing.

2212/6 2200 Kv motor

I found the mid range power to be best with the Plush ESC, not much difference (5 gr) at top end thrust, so I would probably choose the Plush unless I find another custom setting that would work best with the AE-45 and this motor/prop combo.

50% throttle - 11.9A/145.7W producing 540 gr/19 oz of thrust;

100% throttle - 32.3A/391.8W producing 1020 gr/36 oz of thrust.

Wow😲  The mid range thrust is about 60 gr more than the best I have seen with any other prop/ESC for about the same amp draw.  At full throttle, it is about 70 gr more than the previous best I have seen, with about 4 more amps drawn, but still under the 34A limit that these motors seem to have.  This is the first time I have seen more than 1000 gr of thrust out of this motor on a 2 blade prop!

Racerstar BR2406 2600 kv motor

I found that the Turnigy AE-45A ESC with custom settings of 22.5 degrees timing and 24 KHz on the PWM (pulse width modulation) frequency works best with this motor, so that is what I used.

50% throttle - 12.6A/154.2W producing 560 gr/19.8 oz of thrust;

100% throttle - 35.3A/426.1W producing 1070 gr/37.7 oz of thrust.

Again...WOW😲  Compared to the previous best results I have seen with this motor which is with this ESC with the settings listed above and the 6x4 APC gas prop, it is a 30 gr increase in mid range power for the same amp draw basically (.1A difference) and a 110 gr increase at full throttle for only 1.1 more amps drawn!  If this performance translates to the field with this inexpensive motor, it puts it right up there with the "big boy" quad racing motors I have tested thus far😀

I am very excited to test the GF 6045 prop on the Multistar Viking 2208 2600 kv motor which is the strongest of the sub 2700 kv motors I have tested thus far😉

Of course not to get too excited, but I have run the Racerstar BR2406 2600 kv motor and the Viking motor a lot, so I feel pretty sure they have the torque in the air to keep swinging this prop with authority throughout the throttle range.  But only one way to find out, strap it in a plane and get to the field.😀  I hope to get some initial field test results in the next week weather permitting.

Stay tuned for more bench and field testing with this prop😊

Park Jet noise...the "other" sound of freedom😎

Cheers,

Scott

Field test - 2212/5T 2700 Kv motor with 6x3 EMP and 6x4 APC electric props on 3S

Hi Everyone -

I had this beauty out yesterday doing some field testing to validate some bench testing I did a few days ago😊

You can read more details about that testing and my previous experiences with this motor at this blog post.  

Here is the flight video of yesterday's testing.

One of the reasons I did this testing with the Turnigy AE-45A ESC is to evaluate this as an inexpensive power upgrade to the 2212/6 2200 kv motor which is a good starter setup.  Of all the ESCs I have tested in a while, the Turnigy AE-45 is one of the most reasonably priced, versatile and top performing ESCs I have used.  Regularly priced at $21.39 USD, it is a couple of dollars cheaper than the Turnigy Plush 40A ESC and almost half the price of the HobbyWing Platinum PRO 40A ESC that I have also been testing.  To get the best performance with the Turnigy AE-45A ESC, I found setting the timing to 22.5 degrees and the PWM frequency to 24 KHz is optimum for this motor.

As I mentioned in the video, I have also flown this motor with the 6x4 APC gas prop with very good results using the Plush ESC, however the results on the bench were not so good with the Turnigy AE-45.  In keeping with trying to come up with a "budget" setup, I won't discuss that setup as the 6x4 APC gas prop is quite a bit more expensive than the two props I tested in the video and I know some folks can't get it in their part of the world.

The 6x3E sport prop I used in the video is from RC Timer and although you have to buy them in packs of 5 props, it works out to about $0.90 USD per prop.  At Hobby King, the 6x3 TGS prop is $1.61 and at Banggood, the 6x3 KMP prop is $1.64.  The 6x4 APC style electric props from Hobby King used in the video sell for $1.22 a pair or $0.61 each.

So affirmed in the video is yes, you can run a 6x4 prop on this motor, but the quality of the motor will determine how long you can run it with that prop.  As mentioned in the bench test post linked above and the flight video, from my experience, I would say that about 300 flights might be the maximum unless you get lucky and get a really good motor😀  Bearings will most likely be the first thing that goes on these motors as the manufacturers tend to "cheap out" on these to save production cost.

Even with the 6x3E prop, there is a power increase noticeable over the 2212 2200 kv motor with it's best setup.  Especially noticeable is the mid range power and "hole shot" acceleration, so I think it is still a noticeable power upgrade over the 2212 2200 kv motor and the price can be pretty reasonable.

I didn't mention in the bench test video, but you will need to provide your own connectors to be able to connect it to the ESC as it does not come with them.  Also, the prop adapters can be of very cheap quality and can bend easily, so I would suggest picking up some extras.  I get mine from RC Timer, they have worked well for me for a few years now.  I would suggest having a few of these spare for any motors you run with a 3.17 mm shaft as once they bend, they are very hard to get straight again and can sometimes shear off if you try to tighten the prop too hard.😒

If you are interested in more testing on this motor, please check out rcplanepirate's YouTube channel.  He did three videos experimenting with this motor on the bench.  If you do buy the 6x3E sport prop or it's equivalents from TGS or KMP, be aware they are normally not balanced, RCPP also has a great video on how to balance these props for best performance.  As mentioned in my video, here is RCPP's prop discussion video which I find quite informative.

So in conclusion, yes this motor is a budget power upgrade over the 2212 2200 kv motor and can be run on a 6x4 APC prop, however I would suggest not setting your expectations for quality control and longevity too high if you do decide to run the 6x4 prop😊  The 6x3E would probably be the best choice for motor longevity in this case.  You get what you pay for in this situation, and your experiences may differ from mine, fingers crossed you get some good ones😉

Park Jet noise...the "other" sound of freedom😎

Cheers,

Scott

A2212/5T 2700 Kv motor budget power upgrade or buyer beware?

Hi Everyone -

I had the thrust stand busy yesterday doing some more testing with the inexpensive A2212/5T 2700 Kv motor with the 6x3E sport prop from RC Timer and the Turnigy AE-45A ESC.

I am doing some more testing with this motor and setup as a possible inexpensive power upgrade from the 2212/6 2200 Kv motor for those folks who don't perhaps want to play around with quad racing motors that can get a bit more pricey and amp hungry.

I will get to the specifics of the testing towards the end, or if you don't want to wait, you can check out my motor test spreadsheet here.  Please scroll along the bottom to find the tab for this motor, it is over to the right of the spreadsheet.😀  Also, if you watch rcplanepirate's YouTube channel, he has done all kinds of testing and has shot three videos on testing one of these motors he bought from EBay.

I have run these motors in several different planes for a couple of years now and certainly you get what you pay for, but I have had some pretty good performance from most of the ones I bought and have run them pretty hard on 6x4 APC electric props (knock offs from Hobby King) and the 6x4 APC gas prop.  If you pick a couple up, my advice would be to be prepared that your motors might not last terribly long depending on how you run them, quality control is not a big strength of motors that you can get for $5-7 USD😏

The link above for this motor is from GearBest, I have also purchased them from a couple of different vendors from EBay.  GearBest just raised the price to $7.01 USD which is the price at the time of writing this post.  There are several vendors on EBay that sell this motor, I just found this one that sells the motor for $5.16 USD.

The worst experience I have had with this motor were two that I bought from Banggood over a year ago.  The two motors I got from Banggood were not usable, even with a 6x3 prop, they both pulled over 40A and ran exceptionally hot.   Here is the link to the Banggood motor, they want $7.59 USD for their version😕

In all honesty, it is very difficult to know the amp limits on this motor.  Reading specs from this vendor on EBay, they give it a very low amp rating.  Here are their specs copied and pasted in.

Model No.: A2212/5T 2700KV
Weight: 50g
Motor Dimensions: 27.7 * 26.3mm
Shaft Size: 3.17 * 37mm
Battery Operating: 2-3 LiPo
Idle Current: 1.8A
Load Current: 18.5A
Power (Watt): 240
ESC (A): 30A. 20A
Ri (MΩ): 0.14
Peak Amps: 14-22 A

I have a bit of a hard time believing this motor is rated that low, unless it was run on 2S or with a very small, low pitch prop on 3S where you would get very limited thrust.  I think I have also read somewhere it is a 25A motor, again I think a bit low.  However, all of the motors I have run do run warmer/hotter than other higher quality motors.  One of the areas that most manufacturers will "cheap out" on is the bearings which can cause the motor to work harder and rather than producing more power, the motor produces heat.

Here are some comparison pictures.  The motor on the left was run for almost 300 flights using the 6x4 APC electric prop.  This motor was consistently pulling 35A on a static test.  It has now pretty much reached the end of it's productive life as the bearings are starting to go😢  Hopefully you can see that the top has become discolored, much lighter than the new one on the right.

In the next two pictures, I tried to get shots of the wires, the wires on the used motor are darker indicating they have had some pretty high temps running through them.  The new one of course has very nice, shiny wires.

Another thing to look for when a motor is starting to run rough or the bearings are going is to pull gently on the bell of the motor, looking for a gap where my thumb is pointing below.  In the old motor, I can pull the bell so that this gap is about 1mm, on the new motor, the bell barely moves.

So to answer the question, can you run this motor on a 6x4 prop?  Yes, you can, but you need to be aware that you are probably pushing the motor pretty hard and depending on whether you got a good motor or a bad motor will determine it's longevity.  I suppose 300 flights from a $5 motor is not a bad result (about $.02 per flight😉), I have certainly had more expensive motors last less time than that😒

I did run this motor with the 6x3E sport prop in the past, also available from HobbyKing as 6x3 TGS and Banggood as 6x3 KMP and it ran very well, I just preferred at the time the feel and performance of the 6x4 APCE prop.  So now that I have an actual thrust stand that is far more accurate than my previous crude setup, I decided to do some more bench test comparison.  The results were actually quite good.  I first tested with the Turnigy Plush 40A ESC with timing at low as this is the ESC I have been using all along when flying with this motor.  Here are the results with the 6x3E sport prop.

50% throttle - 13.1A/158.8W producing 540 gr/19 oz of thrust;

100% throttle - 28.2A/328.1W producing 995 gr/35.1 oz of thrust.

So these results are quite good and very efficient for that much power.  Compared to the best setup I have found with the 2212/6 2200 kv motor, it is about 80 gr more thrust at mid throttle and 45 gr more at full throttle, so certainly a boost in power, especially at mid range.

So since I have been seeing such great results with the Turnigy AE-45A ESC with custom settings of 22.5 degrees timing and 24 KHz PWM frequency, I gave that a try as well with three different props.  Here are the results.

6x3E sport prop

50% throttle - 14.8A/182.2W producing 586 gr/20.7 oz of thrust;

100% throttle - 30.2A/348.3W producing 1045 gr/36.9 oz of thrust.

6x4 APCE (Hobby King knockoff)

50% throttle - 14.3A/173.0W producing 530 gr/18.7 oz of thrust;

100% throttle - 34A/395.5 producing 1010 gr/35.6 oz of thrust.

6x4 APC gas

50% throttle - 14.6A/176.2W producing 555 gr/19.6 oz of thrust;

100% throttle - 36.5A/402.3W producing 920 gr/32.5 oz of thrust.

So I was quite surprised at how low the top end thrust was with the 6x4 APC gas prop considering it is better than that with the Turnigy Plush on factory default although the AE-45 does give slightly better results at mid throttle.

I was quite impressed with the thrust and efficiency with the 6x3E sport prop with the AE-45 ESC, so I will have to give that a try at the field and compare it to the 6x4 APCE since if I am trying to find a "budget" power upgrade, these props are much less expensive and available than the 6x4 APC gas prop.

So next up some field testing with this motor, the AE-45A ESC and the 6x3E sport and 6x4 APCE props😀

Park Jet noise...the "other" sound of freedom😎

Cheers,

Scott

"Table Talk" - BeeRotor Z2207 2780 Kv motor review for use in park jets

Hi Everyone -

I just shot this video giving my thoughts and a review on the BeeRotor Z2207 2780 Kv motor from RC Timer😊

This motor when paired with the Turnigy AE-45A ESC with custom settings (22.5 degrees timing and 24 KHz PWM frequency) is one of the top performing quad racing motors using the 6x4 APC gas prop on 3S that I have tested thus far.  It is very close to the performance of the EMAX RS2306 2750 Kv motor that currently leads the pack of quad racing motors I have tested thus far.

You can read all the details of my bench testing with this BeeRotor and many other motors on my motor test spreadsheet.  Simply scroll along the bottom to find the motor that interests you.😊

Links to the props and ESCs discussed in this video.

• 6x3 KMP prop (Banggood); 
• 6x3 TGS prop (Hobby King);
• 6x4 APC gas prop; 
• 6x4 APC electric (knock off from Hobby King); 
• Turnigy Plush 40A ESC; and
• Turnigy AE-45A ESC.

I now have put 100 flights through the motor I am showing in the video and it is performing as well now as the first time I flew it.  Very smooth, strong and durable with very good torque and acceleration and top end speed almost equal to the EMAX motor.

As mentioned in the video, it is not as expensive as many of the other top end motors and paired with the fairly inexpensive Turnigy AE-45A ESC is the best value for top end motors I have tested thus far.

You can read Ryan Harrell's evaluation of this motor at his website following this link.

I would also encourage you to check out rcplanepirate's YouTube channel, he has been instrumental in helping me squeeze as much power as possible from these quad racing motor setups in my park jets.

Very pleased with how this motor performs, especially considering it's price😀

Park Jet noise...the "other" sound of freedom😎

Cheers,

Scott

RC Powers F-18 V5 motor change number...5?! ;) - 26 Feb 2018

Hi Everyone -

Had these two steeds out today ripping up the skies😎

Here is flight video of the F-18 V5 using the Multistar Viking 2208 2600 Kv motor, 6x4 APC gas prop, Turnigy AE-45 ESC on 3S.

If you are interested in more of the details on my latest bench testing session with this powerful little motor as recommended to me by rcplanepirate, please go to this blog post.   If you would like to see results with this motor tested with several other props and on 4S, please check out rcplanepirate's YouTube channel.  

If you are interested in more details about my F-18 V5 as it is modified from the original plans, please check out this blog post.  

As mentioned in the video, I am running custom settings on the Turnigy AE-45A ESC of 22.5 degrees for timing and 24 KHz for PWM frequency.

I was really impressed with this setup, in the past I had run the DYS BE2208/7 2600 Kv motor with both the 6x4 APC gas prop and the Master Airscrew 6x4x3, the Grayson Hobby Super MegaJet V2 on the MA 6x4x3, the 2212/5T 2700 Kv motor with 6x4 APC gas prop.  This Viking motor setup runs the smoothest, strongest and most powerful of them all and is lighter than any of the others.

After I shot the video, I ran this motor/ESC combo pretty hard, flying 10 consecutive flights without a break.  The motor ran smooth and consistent and although the temperature was cool at 5 C/41 F, the motor and ESC were barely warm.  For a smaller motor that is lower Kv than many I have tested, it has considerable torque, perhaps the longer 8 mm stator helps with this and the fact it produces 600 gr/21.2 oz of thrust at 50% throttle.  Towards the end of the flight session, the wind picked up to about 5-10 mph and it powered through without issue, I didn't have to really play around with the throttle much at all over flying in calm winds.

I was also impressed by the smooth delivery of power throughout the throttle range provided by this motor/ESC combo.  With some setups I have tested occasionally, you get kind of "dead spots" in the throttle range (no matter how many times I set the throttle points) where it just doesn't respond that well or you get some motor/ESC combos that the difference between about 80 and 100% throttle is not noticeable.  Not with this setup, the throttle response is very quick and precise.

As mentioned in the video, the F-18 V5 while not a slow poke at all is the "draggiest" plane in my hangar, so having a light powerful motor with lots of torque really makes for an awesome flight experience😀  While a bit pricey at $28.70 USD (price just went up by $0.56 😒), if they go back on sale again (I paid $16.10 for mine), I might pick up another as a spare.

As I have to find homes for all of these quad racing motors I have been testing, I think for sure I will leave this motor in this plane for awhile so that I can get some durability testing done.  It is certainly one of the best overall quad racing motors I have tested thus far and I think has a lot of potential to be pushed harder on 4S maybe or run with a wider variety of props than I use.😊

Park Jet noise...the "other" sound of freedom😎

Cheers,

Scott

Multistar Viking 2208 2600 Kv motor bench test session - 24 Feb 2018

Hi Everyone -

I did a bit more experimenting with testing the Multistar Viking 2208 2600 Kv motor today with a couple of different prop and ESC combos.  In bench and field testing, this has proven to be the most powerful quad racing motor under 2700 Kv that I have tested and in fact one of the most powerful overall.  It has reached 1000 or more gr of thrust with six different combos of props and ESCs on 3S, however one of them I probably would not use due to the quite high amp draw at full throttle.  It is one of the few quad racing motors that I have tested to show results that high at full throttle.

You can read the results of the testing on my motor test spreadsheet, by scrolling along the bottom, you will find the tab for this motor to see the results.  I have highlighted in light green the best setup for each ESC I have tested with thus far.  I did not test it with the HobbyWing Platinum PRO 40A with these props below as I have that dedicated right now to another plane and might never run this motor with that ESC.

Today I tested with the Turnigy Plush 40A ESC and Turnigy AE-45 ESCs using the 6x4 KMP and Master Airscrew 6x4x3 props.  You can find links to these ESCs and props on the spreadsheet.  The KMP has produced some very good numbers on the bench, I only have one of them right now, so I haven't done a lot of field comparison just yet.  I tested the Master Airscrew 6x4x3 prop as I had run that a lot on the DYS BE2208/7 2600 Kv motor a lot in the past, so I wanted to see how this motor made out with it.

So I saw some pretty decent results.  With the Plush ESC, the 6x4 KMP produced some good mid range and top end results, better on the bench than the 6x4 APC gas prop.  Although the MA 6x4x3 produced slightly better top end thrust, it's mid range results dropped off considerably compared to the other two props and I know from experience that third blade does cause some drag in the air.  So it would be a matter of field testing the 6x4 KMP and 6x4 APC gas to decide which was the better performer for my flying style.

With the Turnigy AE-45 using the custom settings I found of 22.5 degrees for timing and 24 KHz of PWM frequency, again the 6x4 KMP had very good bench results, significantly more top end thrust 65 gr/2.3 oz than the 6x4 APC gas, but slightly less (15 gr) mid range power.  Mid range efficiency is pretty much the same with both these props pulling the same number of amps.  At full throttle, the extra 65 gr of thrust required 0.8 more amps drawn, so not too bad.

With the AE-45 ESC, the MA 6x4x3 has good top end thrust, again over 1000 gr (1035), but comes at a big amp penalty, drawing 40.7A or 11% more amps than the KMP prop and produces less thrust, so I don't think I would use this prop with this ESC.  Hobby King rates this as a 39.1A motor, I personally think it could handle more than that, but if I have another prop that produces more thrust for less amps, I'll go with that all day.  As well, with a significant loss of mid range power (45 gr less than the 6x4 KMP), it makes that decision even easier😊

So I am thinking about using this motor on a project I am currently pondering for the near future, so good to know I have a couple of options of props to try out, I will probably at this point go with the Turnigy AE-45 and evaluate the 6x4 KMP or 6x4 APC gas.😀

Park Jet noise...the "other" sound of freedom😎

Cheers,

Scott