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Paramotor

Convert thrust to cfm?

I have a paramotor that produces 60 kilos of thrust @ 2778(prop rpm,396.7 mph tip speed) and would like to work out what the cfm is
then I can see what differance there will be when using different sized propellers at different rpm.
Pete

Since you know rpm and tip speed you can compute the propeller diameter and disc area. Thrust is equal to the mass of air flowing through the propeller disc multiplied by the change in speed of the air entering and leaving the propeller. that's momentum theory. Efficiency is based on the mass of air multiplied by the change in velocity squared. (kinetic energy. to calculate the change in velocity need to know propeller disc area. Efficiency changes with the speed of the airplane and altitude assuming you're interested in thrust in flight rather than just static thrust. So, to compare propeller efficiency you will also need to know the effective blade pitch, speed of the airplane, air density, and the propeller activity factor. There are many books available on propeller design. There is a lot more to it than thrust and tip speed. Here's a start.

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Paramotor D-Bag



Powergliding course in Portugal or Spain ?

Anyone got any information on where I can learn to powerglide/powered paraglide/paramotor in these countries.

http://www.windtech.es/fr/links/index_all.html

http://www.nauticatuk.co.uk/AeroMarine_Ltd/Pilot_Village/pilot_village.html

http://www.freerepublic.com/forum/a3b871f7a7ec0.htm

hope these are of use to you

Tags: flying, paragliding, paramotor, paramotor 4, paramotor for sale, paramotor magazine, paramotor pilot dies, paramotoring, parapente, ppg

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