Not a good idea. Not all the plys are going in the direction you would want them to for the spar. There are many planes with plywood spars but they are usually capped with a solid timber. ----- Original Message ----- From: "Bubba" <mystic...@swbell.net> To: "KRnet" <kr...@mylist.net> Sent: Tuesday, February 08, 2005 8:00 AM Subject: Re: KR> To laminate or not ...
> Stephen Jacobs wrote: >> >> I also believe this - so here is a question for the knowledgeable >> among us: >> >> How about making up wing spar caps out of several laminations of ply? >> As we are taught, a good scarf makes for any length you like without >> any strength compromise. >> >> 8 x 1/4" laminations would make up the correct depth (for a 2" spar >> cap) and work just fine for the bent spar. >> >> Using 5 ply must surely result in a bullet proof spar? > > If we can collectively prove to me that this would be structurally sound > I'll build it that way. I'd rather have the dihedral be set at the > centerline than at the end of the stub wings. I know it's strong enough, > but > I still want solid proof of it. > > Laminating the longerons would make life a lot easier, too. No more trying > to find 14 foot pieces. Just scarf 8 foot pieces together to make pieces > as > long as you need, staggering the joints, and laminate it all together. > -- > Steve > N205FT > mystic...@swbell.net > He who seeks will find, and he who knocks will be let in. > > > > _______________________________________ > Search the KRnet Archives at http://www.maddyhome.com/krsrch/index.jsp > to UNsubscribe from KRnet, send a message to krnet-le...@mylist.net > please see other KRnet info at http://www.krnet.org/info.html
