So .... this is the way the gain of efficiency is achive.
I find this an interesting combination of DIY and hands on physic concepts.
Vibration, prop flutter? The prop blade tips are going into and out of different pressure zones,
curious if there is an increase in prop induced vibrations.
No vibration issues. 5 mm motor shaft, 3 bearings and 15 cm clearance on the hull. 14.4.5 props fully balanced.
Mounting the motors in this manor reduces prop overhang and thus any risk of vibration frequency oscillations.
Like I said profile drag is a square law. Put your arms under the prop wash and you incur significant drag penalty and turbulence. Because MK did it the wrong way does not mean we all have to follow!!!!
have you tested this frame in wind gusts ?
i have made some test with tons of frame type and i think you will have stabilization problem when flying on the wind as i have on my tests.
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