Feigao 8XL/9XL Current Requirements

[What's_nitro?]

Relative to my EDF F103GT project I need to know the current requirements of both motors when running on 4s LiPo. Full-throttle continuous current is my main concern, but peak current would help as well. I'm trying to find a pack which will both fit comfortably in the vehicle and also be able to power the setup without issue. I have a 28x155x55mm maximum area that I can use for the pack.

I was thinking about these. Tanic Packs 4s 3650mAH 20-25/40C Would 70A continuous be enough?

[bdebde]

I would try to go 100 amp continuous for those XL motors, if you can fit it. You could probably get away with less if you use high quality batts (flightpower).

[Finnster]

On my setup I was seeing peaks of ~120A and a continous draw of around 40A. Now continuous draw didn't happen for about 3secs after a hard launch and the truck was upto full spd. Bashing/racing will be alot more peaky.

I would think if those are 40c burst (~150A) it would likely be ok. Its running it a bit hard, but I would think they would be ok. Perhaps someone with direct exp can chime in. If possible, I would go with a slightly larger batt (like a 4900) to give some more headroom and runtime tho.

[What's_nitro?]

Thanks guys. Bear in mind this is powering a 90mm ducted fan, not a MT. I know the XL's can draw tons of current on take-off in a MT but a fan rotor weighs almost nothing. I suppose I'll have to buy a wattmeter and find out for sure. I have batteries that can supply enough power, they just don't fit in the vehicle. I bought some nice capacitors on eBay and I'm going to use one of them in there, too.