KR-2S Bent Spars

For general discussion of the KR family of aircraft.
Includes: KR-1, KR-2, and KR-2S

KR-2S Bent Spars

Postby Sean_Caranna » Thu Feb 10, 2005 1:04 am

Mark Langford speaks of using a bent spar in the stub wings where you bend your spars by laminating quarter inch strips together just outside the fuselage. This sets the wing dihedral at the wing stubs and allows fuel in stub-mounted tanks to sump inboard.

I am going to use the AS504x airfoil developed for the KR-2S. I have the AS5048/45 rib templates, available at:

I have a few questions on using a bent spar with the new airfoil.

How do the ¼ strips Mark mentions bend the spar?
How will the rib templates need to be modified for the bent spar?
What effect will the bent spar have on the wing’s washout and angle of incidence?
"I'll have what the gentleman on the floor is having."
User avatar
Posts: 231
Joined: Thu Aug 12, 2004 12:34 am
Location: Daytona Beach, FL

Postby N56ML » Fri Feb 11, 2005 10:44 am

Sean, I suggest you ask this question on the KRnet list ( There are 550 KR builders and pilots there eager to answer your questions. Send a message to [email protected] to join.
Mark Langford
see KR2S project at
New Member
Posts: 1
Joined: Sun Jan 02, 2005 1:13 am
Location: Huntsville, AL

Return to KR Aircraft