Slower Prop?
02-27-2004, 02:45 PM
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Slower Prop?
I have a Model Tech Extra 300L running a .46AX 11x6 prop. I flew it the other day and thought it was a to fast. I just purchased a 12x4 prop and I was wondering if this prop would make a noticeable difference in speed. I want to slow it down as much as possible, yet retain my power for hovering… Any recommendations on props?
02-27-2004, 05:23 PM
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RE: Slower Prop?
I think its the other way around If you want to slow the plane down but still have the hover you need something like a 10x4 or 9x4, the 12 x4 and bigger are just going to bog the motor down. larger props are more efficient meaning it will product more thrust at a given rpm which means more speed.
02-27-2004, 05:56 PM
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RE: Slower Prop?
ORIGINAL: polstery
larger props are more efficient meaning it will product more thrust at a given rpm which means more speed.
larger props are more efficient meaning it will product more thrust at a given rpm which means more speed.
Larger props will not necessary give you speed if they don't have very much pitch. Take a 24" prop for instance. If the blades are totally flat (no pitch), then you won't go anywhere. Pitch is what determines speed, not diameter.
02-27-2004, 10:25 PM
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RE: Slower Prop?
ORIGINAL: polstery
I think its the other way around If you want to slow the plane down but still have the hover you need something like a 10x4 or 9x4, the 12 x4 and bigger are just going to bog the motor down. larger props are more efficient meaning it will product more thrust at a given rpm which means more speed.
I think its the other way around If you want to slow the plane down but still have the hover you need something like a 10x4 or 9x4, the 12 x4 and bigger are just going to bog the motor down. larger props are more efficient meaning it will product more thrust at a given rpm which means more speed.
Short high pitch means minimum static thrust and maximum top airspeed (if the plane's drag doesn't win...)
Hover is 100% dependant on static thrust. More is better... so the long low pitch is correct.
04-02-2004, 12:29 AM
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RE: Slower Prop?
i used 11X4 to slow the plane down with the 46 fx . it will sound noiser . your turning more RPM ( longer prop & higher pitch will lug the plane down & creat more left tourk on take-off) ( lower pitch & shorter prop will in-crease rpm witch will prodouse more hp .) ( engine get the most hp at the highest rpm ) BILL WRC-FLYER
