Somewhere along the way, I decided to design a plane specific for my wants and needs, specifically a 2M RES for winching.
I've designed the hell out of the wing... Used liftroll for the plan form. http://liftdist.freeyellow.com/index.html Collected polars for airfoils in Reduced Reynolds number format. http://soaring.cnde.iastate.edu/calcs/frames.shtml Was inspired by the design analysis of EV Design to analyze MY two "best" choices of airfoil and to select the Aspect Ratio. http://www.rc-soar.com/tech/perfanal.htm to compare the airfoils minimum sink and penetration. Used (and confirmed) Mark Drela's spar sizing formulae. http://www.charlesriverrc.org/articles/allegro2m/spar_sizing.txt Modified the airfoils to something that can actually be built with foam and wood skins. (spreadheet) Printed the patterns for the templates. http://fly.to/tracfoil I should have my cores done by the end of the weekend. I started thinking about the tail feathers. I (now) know how to design the main spar to prevent breakage on a full pedal winch launch (160# of pull to be exact), but what kinds of loads with the tail see? Any help here is appreciated. Thanks. Tom Koszuta Clarence Sailplane Society (Buffalo) NY RCSE-List facilities provided by Model Airplane News. Send "subscribe" and "unsubscribe" requests to [EMAIL PROTECTED]
