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need help to define thrust equations

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need help to define thrust equations

Old 09-30-2011, 03:18 PM
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Default need help to define thrust equations

Can anyone show me some basic equation to get a rough ideas about my thrust based on informations about my engine motor and propeller blade ?
Old 10-07-2011, 02:01 PM
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Default RE: need help to define thrust equations

What I am looking for is Thrust. I am doing conceptual design. I know my initial weight, wing area, airfoil...now I need anelectrical motorthat produce enought T to lift my 6.5 lb Airplane up. So I went to the website and chose Rim Fire 300 with Pconstant = 100 W, Voltage range 7.4 - 11.1 V, Propeller 12x8 in , Nimh 8 cells battery = 9.6V.

Question: is there anyway I can estimate thrust available out of given information ?

Since my airplane estimate weight is ~ 6.5 lb, using wing airfoilNACA 9510, AR = 8, Swing = 0.84 ft^2, Wing incident angle = 0, What is the estimate take off speed ?

Thanks

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