# Finding Lift Force - Glider Wing

by aaronmorg
Tags: force, glider, lift, wing
 P: 6 I am working on my semester project and have come across a hitch. I am trying to find the Lift Force of my wing using the following equation FL=CL P A (v2/2) Where: FL is Lift Force CL is Coefficient of Lift (I think) P is the density of the fluid (Air) A is the Area V is Velocity The only portion I cannot find is Velocity. I cannot, for the life of me, figured out Velocity when given force and mass. I have a 3.33 lbf and a 27.999g aircraft. Can someone please help me. Equation so far: FL=(.76764)(.076)(56.55)(V2/2)
 P: 6 I found the equation for Horizontal Velocity. Here it is for anyone else who might be stuck in the same place. VH=$$\sqrt{\frac{2E}{m}}$$ E is energy m is mass In my case Energy was elasticity since my glider was flung from a rubber band. So I had to find ft-lbf, then use different conversion factors to get to a suitable velocity unit. My work: VH=$$\sqrt{\left[\frac{2(4.1625)ft-lbf}{27.999g}\right]\left[\frac{453.6g}{1 lbm}\right]\left[32.2\frac{lbm-ft}{lbf-s}\right]}$$ Leaving me with Velocity in Ft/s VH= 65.899 ft/s Additional Information: I was given a chart, from whence I figured that 15 in displacement gave 3.33 lbf, and converted to ft-lbf, giving me my E.

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