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Monday, May 27, 2024
J2 Cub with a single bladed prop. The idea being that the blade is always in clean air. Didn't catch on.
One blade can only make half the thrust of two, so what were they thinking? Once the aircraft is in motion all the blades are in clean air. Al_in_Ottawa
That's not how it actually works. It depends on how much power you have driving the prop and other factors as to how many prop blades are optimum for a given performance range. What speed and altitude are you optimizing for? In this case, they had a 37 hp engine. That's less than a lot of WWI fighters had.
I've seen single blade props used in model aircraft - rubber band powered flight. Supposedly gives some advantage that doesn't really scale up to the full size thing.
Wouldn't vibration be a problem?
ReplyDeleteYou would certainly think so.
DeleteCounter weight on the other side.
DeleteOne blade can only make half the thrust of two, so what were they thinking?
ReplyDeleteOnce the aircraft is in motion all the blades are in clean air.
Al_in_Ottawa
That's not how it actually works. It depends on how much power you have driving the prop and other factors as to how many prop blades are optimum for a given performance range. What speed and altitude are you optimizing for? In this case, they had a 37 hp engine. That's less than a lot of WWI fighters had.
DeleteIf it looks stupid it probably is stupid.
ReplyDeleteFanimation (I think) makes a 1 bladed ceiling fan.
ReplyDeleteYeah, generating thrust on only half the blade would cause problems.
ReplyDeleteCounter weights don't address that.
That engine looks tiny, I wonder what the displacement and power is.
ReplyDeleteHere ya go:
Deletehttps://en.wikipedia.org/wiki/Continental_A40
I've seen single blade props used in model aircraft - rubber band powered flight. Supposedly gives some advantage that doesn't really scale up to the full size thing.
ReplyDelete