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turbine propeller
Hi I'm working on an aviation project...a motorized paraglider fan
specifically...and i had a question about using a wind turbine as the propeller The one on this page is the one im thinking of using: http://www.hydrogenappliances.com/bladekits.html Its some kind of plastic reinforced carbon fiber with ~60" diameter. Six blades. Its supposed to be good up to several thousand rpm and has a 70 year outdoor weather rating...so im guessing its reasonably tough...not bad for $89. My main question is will it work as a propeller to generate enough thrust...say 50-100lbs...im going to be able to supply it with ~15hp...(@2000-3000rpm) it seems to have a quite interesting blade geometry...near the hub it has an eliptical cross section with a wide base and a severe pitch... as the blade proceeds out to the tip it goes COMPLETELY flat (no pitch) but in cross section it has a lovely airfoil with a flat side (bottom of wing) and a curved airfoil on the other side (top of wing)...for the wind turbine application use they indicate to put the flat side of the airfoil facing the wind...which way should I orient the flat side if I want to use it for thrust...how would I make thrust calculations or even better measure thrust directly? Will the flexabilty of the prop be stabilized by centripital force even when under load (pushing my 180lb body under a paraglider wing) i.e. will the prop remain reasonably flat if spinning fast enough and not bend and hack my legs/head off....it seems like it is really well engineered from a aeronautics standpoint...i would probalbly make a custom heavy duty hub so please focus replies on the blades...thanks...more generally have any of you used 5/6 blade props on an ultralight? id be interesting in hearing your impressions of how well it worked for you compared to a 2/3/4 blade prop... |
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