4" Kobara ("Cobra") frame build - lovin' it! Dual-stacks (2-20x20 boards, 2-AIO boards without mounting adaptors (or 1-20x20 & 1-AIO board either position)
One of the most noticeable things on its maiden flight was just how quiet she is with these BR 1504.5 2950 Kv motos and HQ Prop 4x2.5 bi-blades! Quitest quad I own and its a 4" (i.e. not one of my many 3" builds)!
frame features, build, and short flight in video here
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nice build!
4" but about the same weight like your 3inchers? longer blades are more silent on the same weight at low rpm, gf4023x3 might be even quieter ;-)
Yes nice build!
Have you tried the HQ props yet? Is this 3S 1504 combo any good at freestyle or is it more of a cruiser?
I have a slightly overweight 3" (120g dry) and want to convert it to 4". Right now using 1303, but really cannot decide to go 1404, 1504 or 2004.. Probably most likely 4" biblade like you, or maybe those HQ. So really curious what you think about those prop on these motors!
Guides & Reviews
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Nice build, so light. Have you tried 6s with biblades? Looks like the electronics will take it, but what about the motors?
I don't fly 6S. 4S only. Electronics can handle 6S no problem. These Kv motors can run 6S with 3" props. Probably not 4" props. MAYBE 4" bi-blades (with throttle scaling, if necessary?).