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3 blade prop on Parajet


mhazeldine
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I'm trying to find an unbiased answer to the following question to help me make up my mind what to buy:

I've been told that the smaller dia. prop on a parajet means that pilots who fly them tend to spend more time on full/higher power than an equivalant pilot with a larger dia. 2 blade prop.

The claim continues to state that this greater use of full/high power means that the torque effect is greater for more of the time.

If anyone can provide me with a impartial answer, and could explain why this is/or is not the case (not too techy please!) I would be most grateful.

Also, if anyone can point me in the direction of a good source of basic info. on prop design that would also be useful.

Cheers,

Mike

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I'm trying to find an unbiased answer to the following question to help me make up my mind what to buy:

I've been told that the smaller dia. prop on a parajet means that pilots who fly them tend to spend more time on full/higher power than an equivalant pilot with a larger dia. 2 blade prop. This is a fair thing to say 'as the simple answer'

The claim continues to state that this greater use of full/high power means that the torque effect is greater for more of the time. This is not true at all, longer props create more torque steer, the parajet offset mounting system also counters 100% of the torque during streight and level flight.

If anyone can provide me with a impartial answer, and could explain why this is/or is not the case (not too techy please!) I would be most grateful.

Also, if anyone can point me in the direction of a good source of basic info. on prop design that would also be useful.

Cheers,

Mike

Hope this helps, tried to give a nice simple answer, i dont doubt for a second that you will get bombarded with science any moment

SW :D [/b]

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  • 11 months later...

A smaller diameter prop with a higher pitch can match the thrust of a larger diameter prop with a lower pitch for the same rpm.

Higher RPM does not ensure a higher torque effect (ignoring all the systems that compsenate automatically or by manual adjustment).

I don't know how to keep it simple and offer propeller design tips, nor am I qualified:

http://www.woodenpropeller.com/Basic_Pr ... esign.html

Understanding torque effect:

http://wiki.flightgear.org/index.php/Un ... d_P-Factor

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