Originally posted by horsefeetky
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Actually the wing is not thin, it measures 1-3/16" at it's max thickness which is in the same range of other 55"(1400mm) sized warbirds out there on the market with similar NACA airfoils.
Going back to earlier similar power factors concerns that have been raised and I have commented on, the comparison between the EF and the FL is two different animals.
The EC1500 is driving 10x9x5 scimitars with a 650kV motor whereas you are comparing to the 9.5x7x3 props driven by 860kV motors.
The power factor demands between the 2 systems are completely different.
The 650kV motor is used because the prop diameter is 1/2" larger with a 2" larger pitch and 2 more blades than what the Bronco is using.
Power factor coefficients are exponential in change to any of the 3 prop factors that are key which in this case all 3 are involved.
If you haven't been following all the posts regularly, Alpha's post #201 and James's post #207(with flight video) pretty much summarized the power system on the Bronco
Regarding your question about using two packs, there is plenty of room to use a large single 4S pack if that is your desire by simply Ying the ESC power leads into a parallel configuration.
In all honesty, the parallel powering of two motors from one power source is what I have done for years because it eliminates the possibility
of corkscrewing it into a graveyard spiral due to a battery failing on a dedicated motor.
Hope this helps resolve some of your concerns/questions.
Best regards,
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