Prop and Rubber
Prop and Rubber
I have a prop that is 6 inch ikara and 16ths inch Fai Super sport rubber and my motor seems to rub out of rotations in much shorter than expected times. My motor stick is 15 inches long to match the length of the rubber. The rubber makes a 15 inch loop since it is so thin please help what do i do to fix this problem?
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jander14indoor
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Re: Prop and Rubber
Need more details to be helpful. How hard are you winding? How are you winding (stretch winding?)? How many turns (that small a motor should take in excess of 1500 to 2000 turns), what kind of lubrication (are you lubricating the motor?)? What is your launch winds and how many winds do you have left on the motor at landing. What is the flight time?
Some generic comments:
- There is NO reason to have the motor stick length match the rubber length. In fact you will be able to save weight and have a stiffer motor stick (both of which are far more important).
Jeff Anderson
Livonia, MI
Some generic comments:
- There is NO reason to have the motor stick length match the rubber length. In fact you will be able to save weight and have a stiffer motor stick (both of which are far more important).
Jeff Anderson
Livonia, MI
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bernard
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Re: Prop and Rubber
I haven't worked with any planes this season, but 1/16" (0.0625") sounds rather thin. Last season's rubber was around 0.08-0.09".
"One of the ways that I believe people express their appreciation to the rest of humanity is to make something wonderful and put it out there." – Steve Jobs
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bjt4888
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Re: Prop and Rubber
Duckman,
I would strongly recommend that you read last year's Wright Stuff Wiki in its entirety (go to the "Board Index" and scroll down to the archives). It might seem that this is a daunting task, but you will discover that many pages of the wiki have only brief questions or comments on them. Skim to the comments from Jeff Anderson, Calgoddard, myself and the students with experience in this event (it's not hard to determine which comments to focus on). This reading will only take you about an hour or two and it will advance you rapidly from a novice to an advanced level of knowledge in many aspects of the Wright Stuff event.
Bernard is correct in his comment that .0625" rubber is quite thin even if your propeller is very low pitch and has small blades. I have coached students in a different event that uses the small Peck ROG airplane with the small "sleek streak" propeller and even this airplane required .070" to .075" rubber to perform well.
Good luck and keep digging deeper,
Brian T.
I would strongly recommend that you read last year's Wright Stuff Wiki in its entirety (go to the "Board Index" and scroll down to the archives). It might seem that this is a daunting task, but you will discover that many pages of the wiki have only brief questions or comments on them. Skim to the comments from Jeff Anderson, Calgoddard, myself and the students with experience in this event (it's not hard to determine which comments to focus on). This reading will only take you about an hour or two and it will advance you rapidly from a novice to an advanced level of knowledge in many aspects of the Wright Stuff event.
Bernard is correct in his comment that .0625" rubber is quite thin even if your propeller is very low pitch and has small blades. I have coached students in a different event that uses the small Peck ROG airplane with the small "sleek streak" propeller and even this airplane required .070" to .075" rubber to perform well.
Good luck and keep digging deeper,
Brian T.