Current draw of 550 size motor???
12-29-2007, 11:56 AM
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Current draw of 550 size motor???
I am finishing construction of a Great Planes Spectra glider. The kit came with a 550 size cobalt motor, which uses an 8X4 prop. The kit uses a microswitch to turn the motor on and off. I would like to install an ESC in place of the microswitch. I'm trying to determine how much current the motor will draw so I know how large an ESC to purchase. Does anyone know how much current the motor will draw? The motor is rated for 7.2 - 8.4 volts. If I use a LiPo battery, do you think the motor will be able to handle a 3 cell LiPo pack, or should I use a 2 cell pack?
Thanks,
Greg
Thanks,
Greg
01-09-2008, 11:45 PM
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RE: Current draw of 550 size motor???
Not a colbolt motor. just a $5 brushed can. 105 watts. Max 7 cell - 8.4v
8v X 15amp = 120 Watts -you bet- powered glider is about the only thing a 'can' will fly. Use a 8x4 prop. Be happy if it climbs. BUT in the early 90s in a Electra 78" glider with a 1200 mah 7 cell (motor off-on switch with servo) it was lots of fun!
8v X 15amp = 120 Watts -you bet- powered glider is about the only thing a 'can' will fly. Use a 8x4 prop. Be happy if it climbs. BUT in the early 90s in a Electra 78" glider with a 1200 mah 7 cell (motor off-on switch with servo) it was lots of fun!
02-02-2008, 10:20 PM
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RE: Current draw of 550 size motor???
ORIGINAL: write2dgray
Yep, I'd look at going 2S lipo with a 25A ESC, like the a Castle Creation's Phoenix-25.
Yep, I'd look at going 2S lipo with a 25A ESC, like the a Castle Creation's Phoenix-25.
02-02-2008, 10:31 PM
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RE: Current draw of 550 size motor???
ORIGINAL: Dr Kiwi
No, he has a brushed motor so he needs something like a Pegasus 35P (I don't see a 25A brushed CC ESC).
ORIGINAL: write2dgray
Yep, I'd look at going 2S lipo with a 25A ESC, like the a Castle Creation's Phoenix-25.
Yep, I'd look at going 2S lipo with a 25A ESC, like the a Castle Creation's Phoenix-25.
