FoxhallGH
Well-Known Member
In these situations where the MM is obviously maxing out in rpm on the rear motors, but not getting the thrust it needs - I'm wondering if a question we should be asking is "How are the prop's stowed on these drones when they are folded up between flights?"
Here are some thoughts I put on the table for debate ...
If the props are able to be deformed by e.g. putting a retaining band around the drone that presses the prop-blades into the fuselage - and they don't immediately regain their shape - then there would be a danger of the 'pitch' of the prop blade being reduced, or even going negative at the tips. That of course, would give this effect of max rpm on the motors, yet not sufficient lift generated to push the nose over to get solid penetration into winds.
An additional factor might be that if the drone is packed up hot after a flight, and the prop blades are put in some 'band' to hold them steady - then both front and rear prop sets may be put under compression against the warm body of the drone. That heat may be enough to soften the plastic of the prop blades and remove some of their longitudinal twist (pitch)??
Here are some thoughts I put on the table for debate ...
If the props are able to be deformed by e.g. putting a retaining band around the drone that presses the prop-blades into the fuselage - and they don't immediately regain their shape - then there would be a danger of the 'pitch' of the prop blade being reduced, or even going negative at the tips. That of course, would give this effect of max rpm on the motors, yet not sufficient lift generated to push the nose over to get solid penetration into winds.
An additional factor might be that if the drone is packed up hot after a flight, and the prop blades are put in some 'band' to hold them steady - then both front and rear prop sets may be put under compression against the warm body of the drone. That heat may be enough to soften the plastic of the prop blades and remove some of their longitudinal twist (pitch)??