KD 63-28S Brushless Outrunner 248Kv

 bpatrickd 27 points

You may find that this motor is to large/heavy (540g) for a 52”* Pitts. This motors KV is low for your battery and prop combination. You will not want to use a larger prop, the torque effect will become significant. Your battery is a bit large/heavy for this size plane. If you reconfigure your batteries to provide more than 22.2V you could use this motor. It would be better if you target a 16”* to 17”* prop with your current 6s battery and a ~400g motor with a 350Kv to 400Kv.

 BrianB192 1294 points

Pat ,thanks For advice ,I can see your concerns are greatly Experienced.I do realize The Battery is Heavy ,So using different battery ,my Variety of props is good. And Knowing I am able to use this Motor would Be good .i have 3 x 7.4 volt In a few different sizes .to obtain the voltage with over 22.2.,, What would you advise with this ,as i an new to this sizes ,being a step over the Average park flyer.

 bpatrickd 27 points

If you already have this motor and you must use it in your application you will need to put together a 10 cell battery (~42 V) targeting a total battery weight of <600g. If you are limited to a 6 cell battery (22.2V) the easiest (cheapest) thing would be to purchase a motor that fits your needs: a 400g motor with a Kv of 350 to 400.
Take a look at the smaller KDA outrunner, KDA 50-14L, it looks like it would fit your needs well. You can run the KDA 50-14L with your 6 cell (22.2V) battery and a 16”* or 17”* prop.

 Sice Flying 67 points

Sory I am using a Turnigy dlux 80A HV Brushless Speed Controller (OPTO)

 bpatrickd 27 points

Check the "C" clip on the motor shaft. If it has come loose the motor bell can shift forward which drives the current draw way up and the performance way down. I put a collar on the motor shaft after having this happen during a static power system test. This is not uncommon on this size motor, many come with a locking collar.

 BrianB192 1294 points

Yes Pat ,I Have this problem ,.Many Of the Larger Motors Have this shaft Collar ,And Last Night i spent alot time trying to Loosen ,A motor little smaller in size. it was to go in 52 pitts, But on test ,Motor Became Very Hot in seconds ,smoke cam out ,, as wires Become hot .I found Motor To be Tight ,i found Oil Seal Damage .possible cause was seal hitting baring , But Motor Is still Tight ,and I might need to replace Barings ..,Motor Has Not Run from New ,got it last week ,totally defective as was the ESC sent with it ,Just Dead on arrival HK 70, dead ,found after fitting all the Plugs ,,its 5 x this ESC now sent defective ,so i got the turnigy as you told me.Quality is better .

 H-KING_SCOTT 5161 points

It does not matter, initially connect any 3 of the motor to ESC wires in any order then test direction of rotation, if it is wrong, change over any 2 of the 3 wires to reverse direction.

 firemansorel 27 points

i forgot to tell you that it use a 20x10 or 18x8 prop... thanks again...

 bpatrickd 27 points

For the 20X10 prop you will want to run an 8 cell lipo battery. To run the 18X8 prop you will want a 10 cell lipo. Both setups require a high voltage ESC. I would look at the TURNIGY K-Force 70A-HV OPTO Brushless ESC (the same as the Hobbywing 70A HV ESC).

I am running this motor on an 11 cell A123 battery (equivalent to a 9 cell lipo) swinging an 18X12 on a 60” CAP. I am using the Hobbywing version of the ESC and it has performed very well for me.

 BrianB192 1294 points

what do you think if i use this Motor On a 52 inch Pitts with 3x7.4 volt 22.2 volt from 6000mah hard case x3 ,would it be To large and Heavy , or ,> will it be good 3D Pitts ,!