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Jun 04, 2010, 07:31 AM
Here comes the rooster...
JesseB's Avatar
Discussion

BP2212/13 on 3S


All,

I just put a BP 2212/13 on the Dipstick, and noticed that the current with a 10x4.7 slow flyer prop was over spec for the motor's continuous current. (3S lipo) This is Millennium's recommended set up.

It was late when I did the test (not sure my sleeping wife appreciated the noise), so I can't tell you exactly how many amps over spec it was, but it seemed a fair amount. I put a 9x5 APC on it, and it drew 12.8 Amps. BP specs the motor at 13 Amps for 60 seconds maximum, so it appears that this is the biggest prop I should use.

What's everyone's experience with this motor on a 3S set up, at various prop sizes?

Thanks
Jesse
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Jun 05, 2010, 02:45 PM
Not your average DiggsyBear
Diggs's Avatar
Jesse,

I haven't used that motor before but can tell you that a static test will draw more amps than the plane will while in the air since the plane is moving and there is less resistance/drag on the prop.

Lots of prop data here
http://www.bphobbies.com/view.asp?id...7&pid=B1688512

Looks like the 9x5 is a recommended prop so I would fly it with that and just make sure it doesn't run so hot you can't touch it when you bring it down.

Diggs
Jun 05, 2010, 02:50 PM
The "K"minator
Crazy Eight's Avatar
My buddy Jake posted an Eagletree graph https://www.rcgroups.com/forums/showthread.php?t=894416
Jun 06, 2010, 09:18 AM
Here comes the rooster...
JesseB's Avatar
Thanks guys. I'm gonna' have to try it again. That graph's data shows the 10x6 as safe.

Jesse
Jul 04, 2010, 02:23 PM
jkarpy's Avatar

10-4.7 is safe


I have been using this setup for more than two years. The 10 4.7 is the rite prop. BP's specs are over conservative. 20-21 amps static is normal.

James


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