gooseF22
Posts: 705
Joined: 8/12/2006
From: Fort Wayne,
IN, USA
Status: offline
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quote:
ORIGINAL: cncswiss1
as long as you have the "C" rating to cover the ampl you intend to pull you will be fine.. @60 amps you will need 40c packs!
I have been playing on moto calc a bit and it helps a lot
http://www.motocalc.com/
what speed control do you have? is it up to 6c? to get about the same wattage ~630 on 6s requires a 7" prop
but you could spin that 7.5 x 8 pylon prop mentioned above at 18K rpm on the ground, but throttle management will be absolutely necessary or you'll cook that motor.. allow for good cooling, and keep full power blasts short.
I went through all this too in growing pains. with an 1130 KV motor, you can run a 6 cell lipo and turn a 7x6 graupner CAM prop and get over 100 mph with it.
Sorry guys its just taking me longer than planned on mine. Its almost ready to cover. Its a medusa 2500 kv on 6A123's, so it runs the equivalent voltage of 4 and 1/2 cells. I have run this setup already and it turns close to 30K on a 6x5.5 apc. If that isn't enough umph, then I will transfer the 1600kv, 8S 123 system over. It was pushing the little bobcat well over 100mph, and thats twice the weight and alot more drag.
I have gotten the best speed performance from the little graupner black speed CAM props. You have to let the electric unwind too, so its a very fine balance to find enough thrust and not lose too much speed. I got more speed from the 7x6 than I did the 8x6, it wasnt as peppy, but it was faster.
You actually will get better performance from an Inrunner on this setup. Thats alot of mass turning up front.
If all you could stuff into it was a 3S4000 battery, then you will need a medusa 2500 KV, with a 8x6 but it will get HOT due to the amperage/wattage. with your current setup, go get some 2000mah 25c cells and build two three packs for 6S. You will get about 6 min flight. That will take care of the amperage problem. Remember, at the high wattage, you have to get cooling air to the battery and controller. I cut a hole in the firewall and a big exit in the back, and cut down the bulkheads for airflow.
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Goose
Team Fromeco
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RE: (Something Fast?) Delta Build Thread - 
Speedy
