Well, how do you know? The Aircraft Spruce stuff is E-glass and E-glass is lowest strength. You could look for Owens Corning S-glass with 30% more strength. But what is specified on the plans?That stuff is for structural applications....but only with relatively low loadings, such as molds. I would not use it for spar caps...
This is exactly how Velocity spars are made using S-Glass roving in a mold then layers of Biaxial cloth laid last in the mold for the shear web. The Traxial glass wing skin is bonded to the outside surface of the spar cap thus imparting some protection against lateral failure of the resin matrix encapsulating the glass fiber tow under heavy structural loading.
Nope. E-glass on the VE, LE, COZY, E-Racer, etc. See:I am not the one building, but my background with Long EZ's has me understanding that S-glass tapes are used for the spar caps...
Whoops!! That is correct. My bust!Nope. E-glass on the VE, LE, COZY, E-Racer, etc. See:
UNIDIRECTIONAL SPAR CAP FIBERGLASS TAPE This woven unidirectional tape consists of a plain weave construction with at least 80% of the fabric weight in the 0° or Warp direction.www.aircraftspruce.com
Gotta be a sarcastic comment, designed to get ol' Billski revved up. Grin.
Bill, my interpretation is that the other Bill was asking about using the unidirectional glass fiber that is fed to chopper guns as a potential source of uni for spar caps. No suggestion there of chopping it.Gotta be a sarcastic comment, designed to get ol' Billski revved up. Grin.