SunnySky Edge R2305 2800 Kv motor additional bench testing with different ESCs

Hi Everyone -

While testing another motor, I did some more testing with the SunnySky Edge R2305 2800 Kv motor.😊  You can read more about my initial impressions and bench testing on this motor at this blog post and my initial field testing at this blog post.

You can read the full details on my motor test spreadsheet.  This motor continues to be quite "amp hungry" regardless of the ESC.

Of the three ESCs, Turnigy Plush 40A, HobbyWing Platinum PRO 40A and Turnigy AE-45, it seems to like the Turnigy AE-45 with the custom settings of 22.5 degrees timing and 24 Khz.  It showed a slight improvement at mid throttle over the Plush and the best improvement of all three ESCs at full throttle.  Here are the numbers for the Turnigy AE-45A ESC with 6x4 APC gas prop on 3S.  Links for all of these available on the spreadsheet.

50% throttle - 14.9A/179.5W producing 565 gr/19.9 oz of thrust;

100% throttle - 45.3A/506.1W producing 1065 gr/37.6 oz of thrust.

So this amp draw is pushing the ESC to it's base limit, I will have to field test it to see if there is any significant heat build up in either the motor or ESC, but I was happy to see some improvement😀

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

Cheers,

Scott

DYS Samguk Shu 2306 2800 Kv motor initial impressions and testing

Hi Everyone -

Received my DYS Samguk Shu 2306 2800 Kv motor in the mail today😊  Regular price is $12.58 USD although I got mine on sale for $9.90 which is still the price as of writing this post, although it is currently out of stock for the second time since the motor was released.  Must be popular😉

Just basic packaging, even comes with a bit of a Chinese proverb/story?

Standard bag of goodies, prop nut, mounting screws and a couple extra C clips.

Top view of motor, shaft is hollow on the top, as you can see in the second picture it is solid towards the bottom.

Bottom view.  This is a "naked bottom" motor that seems to becoming a popular design in quad racing motors to keep weight down.  The bolt pattern is actually 16x16 mm as opposed to 16x19 mm.  This also seems to be a current trend in the newer quad racing motors.  It is a bit of an optical illusion, the magnets are flat, not curved like some of the higher end motors, but that would be expected for the price.

The motor spins smoothly, no bumps, but the magnets don't feel as strong as some of the other motors I have tested, again could be due to the inexpensive price.

Motor weight without hardware is 32 gr/1.1 oz.  Banggood website says 33.56 gr.  Motor wires are 150 mm/5.9" long.

Motor weight ready to go in the plane with prop and hardware is 46 gr/1.6 oz.

Due to the bolt pattern, I will have to trust the X mount will stay connected with two screws.  Co-pilot gives his approval👍😉 

I managed to get some initial bench testing done with the three ESCs I have been using/testing, you can read the details on my motor test spreadsheet, if you scroll along the bottom of the spreadsheet, you will find this motor has it's own tab. Since the Turnigy Plush 40A is the one I will use for initial field testing to keep it consistent with all the other initial field testing I have done, here are the numbers.  Using the 6x4 APC gas prop and Gens Ace 2200 3S 45C battery (links are available for these on the spreadsheet).

50% throttle - 14.3A/175.3W producing 525 gr/18.5 oz of thrust;

100% throttle - 40.1A/458.0W producing 965 gr/34.0 oz of thrust.

So it is definitely an "amp hungry" little beast at full throttle.  I must admit I expected the numbers to be higher, but as I have learned, the bench numbers don't always reflect field performance, so it is in my test bed Mig-35B and ready for some action in the air😊  As often happens, there is not published maximum amps for this motor, according to some charts on the Banggood website, it pulled 42A in some testing, so I will have to see how the motor responds in the air.

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

Cheers, 

Scott

SunnySky Edge R2305 2800 Kv initial field testing

Hi Everyone -

I had this little beauty out to rip a dozen batteries through the SunnySky Edge R2305 2800 Kv motor I finally received in the mail😀

Here is the flight video from today's field testing.

You can go to this blog post to read more about my initial impressions and the initial bench testing.

This motor performed very well as I really put it through it's paces for another ten flights after I shot the video.  Although as I mentioned in the video it was quite amp hungry (41.6A) at full throttle on the bench with the 6x4 APC gas prop and Turnigy Plush 40A ESC, the ESC and motor ran quite cool.  Although the temps were cool at about 2 C/36 F, it ran cooler than some of the other motors in this size and Kv range I have tested.

With this ESC it does not quite have the mid range power of some of the other motors, but I found that by just increasing the throttle by about 5% from what I normally fly around with it performed quite close to the EMAX RS2306 2750 Kv motor.

It has very good acceleration and top end speed, with the Plush ESC with default settings, I would put it in the same ball park as the BeeRotor R2207 2780 Kv and the Foxeer DATURA X2206 2700 Kv motors.  I am excited to test it soon with the HobbyWing Platinum PRO 40A and Turnigy AE-45A ESCs with the custom settings I found with those for high Kv motors.

Overall, very impressed thus far with this great little motor from SunnySky😊

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

Cheers,

Scott

SunnySky Edge R2305 2800 Kv motor initial impressions and bench testing

Hi Everyone -

After waiting 40 days😣 for my SunnySky Edge R2305 2800 Kv motor to arrive, it is finally here😀  I ordered from AliExpress as Banggood was out of stock at the time and AliExpress had a good deal.  They list it as regularly priced at $41.00 USD, I picked mine up for $20.90.  They are also available at Banggood for a regular price of $23.71 USD.  So this makes me scratch my head a bit, the sale at AliExpress is over tomorrow, so I'll be interested to see what the price is then😒, $41.00 seems a bit much to spend for a motor😲

This is only the second time I have ordered from AliExpress, I did find the shipping was very, very slow, almost a week and a half longer than my average Banggood order, so it might be awhile before I order from them again, but here endeth the rant😉

Motor packed nicely in some very dense foam.

I was a bit worried when I saw this label, as I was sure I had ordered CW (clockwise) motors, but then when I looked back at the AliExpress website, I actually didn't get to choose that, only the Kv.  This relates to the direction that the nut tightens as the motors can run whatever direction you want them.  However, after unboxing, the threads are clockwise so that I can still use all the little bullet nuts I have laying around😊

Motor comes with one prop nut, four mounting screws and some very thin brass and what look like steel washers, plus a couple of extra C clips which is a nice touch.

The motor weighs 32 gr/1.1 oz with no hardware (AliExpress says it weighs 29 gr).  The wires are 120mm/4.7" long. 

Bottom and top views of the motor.  As you can see it is wound with several strands of thin wire to allow it to have such a high Kv.  The magnets are quite thin, it is difficult to see if they are curved or not, the air gaps are not bad and tolerances between the magnets and stator look pretty good.

I grabbed this picture from the SunnySky link in the first paragraph.  It does look like a slight curve in the magnets and according to the description they are N52 arc magnets which is common in most higher end powerful motors.  The motor spins very smooth and freely by hand, no jerkiness, however the magnets don't feel quite as strong and "grabby" as some other motors in this size and Kv category that I have tested.

With the prop, X mount, connectors and other hardware, the motor going in the plane weighs 48 gr which is pretty decent for this size motor.

I did get one quick bench test done as I hope to fly and field test tomorrow.  I did this test with the Turnigy Plush 40A ESC, timing at low, 6x4 APC gas prop and Gens Ace 2200 3S 45C battery which has been my standard for testing these quad racing motors.  You can read more details here as well as get the links for all the aforementioned gear on my motor test spreadsheet.

Here are the numbers from this test.

50% throttle - 14.3A/173.6W producing 556 gr/19.6 oz of thrust; and

100% throttle - 41.6A/502.1W producing 1030 gr/36.3 oz of thrust.

So it is pretty amp hungry at full throttle with this setup.  It's numbers are not quite as good as some of the other motors in it's size and Kv range, but I won't know how it really performs until I get a chance to get it in a plane and out to the field😀  Also, when I have a chance in the next few days I will test it with the HobbyWing Platinum PRO 40A and Turnigy AE-45A ESCs with the custom settings I found for some of these high Kv motors and see if that makes a difference.

More test data to follow soon😁

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

Cheers,

Scott

"Table Talk" - Park Jet workshop miscellaneous items

Hi Everyone -

I recently shot this video to fill in any blanks that I may have missed in my revised Park Jet workshop video series.😊

I have made a playlist on my YouTube channel entitled Park Jet workshop video series so you can watch whatever video topic interests you.  They are in no particular order, however I would say the one above is probably the last one to watch if you watch the whole series.

Links to some of the goodies discussed in this video.

• 3.5mm bullet connectors; 
• ESC extension wires (already made by Hobby King);
• XT60 connectors (male for putting on ESC);
• Servo extension wires; 
• Y harness; 
• 100 pc 6x1mm rare earth magnets

I hope that this video series has been helpful to you if you are first starting off in park jets or have been in the hobby for awhile and are looking for inspiration or new ideas.  If you have any questions, please do not hesitate to leave a comment on any of the videos, supporting blog posts or e-mail me at scott.parkjet@gmail.com.

Blue skies and calm winds to everyone!

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

Cheers,

Scott

"Table Talk" - EMAX RS2306 2750 Kv motor 100 flight review for Park Jet use

Hi Everyone -

I have been having a great time testing the light and powerful EMAX RS2306 2750 Kv motor and now have just over 100 flights on this little beast😀

Here is a "Table Talk" video I shot reviewing and discussing my experiences with this motor in more detail.

This blog post gives some fairly comprehensive comparison numbers of testing I have done with this motor.  You can also read all the details on my motor test spreadsheet, if you scroll along the bottom you will find the tab for the EMAX motor.  Also, if you go to the motor test spreadsheet, you can find links to all the ESCs and props I discuss in this video.

Here are links to some of my flight videos testing this motor in different configurations in different planes.

• Initial test in my Mig-35B test bed with Turnigy Plush 40A ESC and 6x4 APC gas prop;
• Flight footage in my RC Powers T-50 V5 with the HobbyWing Platinum PRO 40A ESC with custom settings and 6x4 APC gas prop; and
• Flight test in my Mig-35B test bed with HobbyWing Platinum PRO 40A ESC with custom settings and 6x4 KMP prop.

Here is rcplanepirate's first test video with this motor.  He tests a wide range of smaller props on 4S and even 6S.  

As I mention a few times in my video, I am very impressed with the performance of this motor.  The mid range power and speed blows away any of the previous high Kv motors I have run like the 2212/5T 2700 Kv (you can read the bench test data on this motor also on the spreadsheet linked above) which is what I think gives it such good hole shot acceleration and mid range torque even though it is a relatively small motor.  It is well made, runs strong and I think could be pushed much harder with different batteries and/or props.

It is certainly not a cheap motor, paired with the HobbyWing 40A ESC it is an expensive combo compared to many other options out there.  If I hadn't already been experimenting with the HobbyWing ESC, I would still be very happy running it with the Turnigy Plush 40A ESC.  When HobbyKing gets them back in stock, I will be picking up a V4.2 to see if it runs better than my current V3.1.  

As I mention in the video, although I don't have actual radar gun or GPS speed data to compare, the speed experience is about the same as the much heavier NTM 2836 2700 Kv motor on with a 6x4 APC prop, but the overall flight experience is much better due to the significantly lower wing loading.

When I first started wanting to experiment with quad racing motors in park jets, this was the type of setup I was looking for in planes where I really wanted some great speed, torque and acceleration and although the motor and ESC combo I prefer is a bit pricey, I think I am getting my money's worth😀

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

Cheers,

Scott

"Table Talk" - Park Jet pushrod and linkage ideas

Hi Everyone -

Continuing in my series of revising my Park Jet workshop video, I shot this video today discussing different ideas for making your own pushrods and linkages for your park jets as well as details on what I have used for quite awhile😊

As mentioned in the video, here is a very old blog post I wrote on the old NAMC blog about the money and weight savings of making my own pushrods over using the Dubro pushrods which I have to buy online since I do not have easy access to a local hobby shop.

Here are the links to the materials I use to make my pushrods.

• 2mm carbon rod;
• 2mm linkage stoppers; and
• nylon clevis to attach to the control horn.

Here are some close up pictures of the items I discussed in the video.  First the control horns, the one on the left is the standard from most RC Powers plans that you can cut out yourself from wood, gift cards, any other stiff, strong material.  The one on the right is the one from Flite Test that I buy from this distributor in Canada.

Close up of the nylon clevis.

Here is the 2mm linkage stopper in it's pieces, the main body with threaded post, two washers, one to go on each side of the nylon servo arm, round nut to secure the stopper to the servo arm and grub screw to secure the pushrod into the linkage stopper.

As I mentioned in the video, there are all kinds of ways to make your own pushrods and control horns with whatever you have available and whatever works for you, just a little imagination and away you go😀

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

Cheers,

Scott