So is the general consensus that the torque spec is, “Tight as
you can get it!”?
Bill B
From: Lancair Mailing List [mailto:lml@lancaironline.net] On Behalf Of Dennis Johnson
Sent: Monday, January 07, 2008
3:51 PM
To: lml@lancaironline.net
Subject: [LML] Legacy Wing Bolt
Torque Specs
>Does anyone know the torque specs for the two wing spar bolts on
the Legacy?
I asked my aero engineer friend the same question when I was building
my Legacy. He said that one purpose of torquing a fastener is to make
sure that the torque exceeds the tension load experienced by the fastener while
it's in use. I think what he meant is that you want the tension on the
bolt to be high enough that it's not possible for any "play" to
develop from further stretching the bolt when the bolt is in use.
The Legacy's wing bolts are mainly stressed in shear and are
under light tension load, so the "correct" torque is probably
not critical. I looked up the standard torque of that size bolt, which
was way more than I could achieve in such a cramped space.