OldSchoolFlyer
I recently blew up a 70mm EDF with a 2827 3500kv motor so I cut out the mount and installed it in a RCP F-15 V5. ?? Anyone have experience with a 3500kv 148v motor with a prop?? What size prop ? battery size 14.8 or 11.1 ? ESC 30 or 50 amp ??
Old School Flyer
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Wildthing
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I recently blew up a 70mm EDF with a 2827 3500kv motor so I cut out the mount and installed it in a RCP F-15 V5. ?? Anyone have experience with a 3500kv 148v motor with a prop?? What size prop ? battery size 14.8 or 11.1 ? ESC 30 or 50 amp ??

Sent you a PM
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andy_downs
let us know how you get on,im intrigued how this works.
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OldSchoolFlyer
I got the testing instructions from Wildthing. I need to buy a amp meter to make accurate amp measurements and test. I will keep you posted. Thanks Jim
Old School Flyer
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Wildthing
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I got the testing instructions from Wildthing. I need to buy a amp meter to make accurate amp measurements and test. I will keep you posted. Thanks Jim

Amps and Watts
Here are a couple ideas
https://hobbyking.com/en_us/turnigy-180a-watt-meter-and-power-analyzer.html
https://hobbyking.com/en_us/turnigytm-7in1-mega-meter-battery-checker-watt-meter-servo-tester.html

Couldn't find the one I have so do a little reading.

Cheers
Jeff
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quorneng
The motor turned a 70 mm (2.75") fan at "x" revs. So the question is going to be how much bigger can the prop be so the motor still draws the same current?
I fear the answer is not that much bigger so you end up with a small prop running fast. It will be a bit more efficient than the EDF with more thrust but not by very much.
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OldSchoolFlyer
Thanks for the info. I will try some smaller props and measure the current to determine a safe throttle setting. Sound like full throttle may not be possible for this motor with a prop. I will post my results Thanks for all the feedback
Old School Flyer
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FED50H
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Thanks for the info. I will try some smaller props and measure the current to determine a safe throttle setting. Sound like full throttle may not be possible for this motor with a prop. I will post my results Thanks for all the feedback

We use 3200kv motors on the FRC SP3 turning a 4x4 prop. I've always used a 60 amp esc with no issues...that is with 3s batteries...in 4s, I never keep wide open for more that a few seconds....the sp3 is smaller than the v5 I believe though....

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OldSchoolFlyer
Thanks for the info on the prop and battery sizes
Old School Flyer
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FED50H
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Thanks for the info on the prop and battery sizes


Anytime. It may or not work for your plane, but it gives you a rough idea. Good luck and let us know how it works.
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OldSchoolFlyer
I posted to bench test discussion my first flight with 2827/3500kv. I had good results and no problems at 50-60% throttle on a 3 cell/2200 even tried 100% vertical for about 10 sec. both engine and battery warm but not excessive heat. thinking trying 4 cell battery next and more 100% throttle ?? The flight speed and performance were very close to my Turnigy motor/2200kv 6X4 prop on 3 cell. Photos of modified RCP F-15 to F-4 Phantom and engine installIMG_20180416_103418.jpg 
Old School Flyer
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OldSchoolFlyer
I made more test flights today to determine if this motor will stay together at full throttle. I am using the 60amp ESC and a 3 cell 2200/35c battery . I launched and made the first flight with 5-10 sec full throttle bursts with no problems so I made a second flight of about 5 min using full throttle from launch to landing. No problem ! ESC and engine were warm so I added some large cooling vents in the bottom of the fuselage and that really help keep everything cool. It's very fast and great vertical climb with the 5X3 prop I don't see any reason to go to the 4 cell battery, the engine performs great with 3 cell.
Old School Flyer
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OldSchoolFlyer
Full throttle test flights with 3500kc 2827 QM motor. I mounted a 6 X 4 APC prop and used the same 3S 2200 battery 60 amp ESC that I used with the 5 X 3 prop and WOW what a difference ! The 6 X 4 prop was much fast and unlimited vertical compared to the 5 X 3 prop. I engine was warm after a 3-4 min of mostly full throttle flight without a problem. I see no need for the 4c battery. I am hoping the FrSky air speed module arrives soon, I am anxious to measure and post some speed comparisons. This 2827/3500 kv engine is alot faster than the turnigy 2826/2200 kv motor with the same ESC battery and prop. The only negative issue is the increased torque roll . I addition I could hear noise at full throttle that sounded like flutter, so I sealed the bottom of all the control surface to help prevent flutter. These QM EDF fan motors are available on Ebay for about $20 if anyone is interested in trying one for yourself. I will measure and post some air speeds and comparisons when I get the module arrives.
Old School Flyer
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