Use Loc-Tite for Preliminary Fit of Aileron and Flap Hinge Rod Ends
Flap Hinge Mounts: Tack Weld At First
Source: 1999 Beartracks, Bob Barrows
Refer to drawing #13. When making the flap hinge mounts it is best to just tack weld the pieces together first and not finish weld until the wing is finished and the flaps are in place. This will allow you to cut the tack welds and realign the hinge mounts if needed in order to achieve the best fit up between the flaps and wing. Once the fits are established then remove the fittings from the wing and finish welding.
Flap hinge mount as removed from welding jig, tack welded together only!
Engineering Notice Concerning Flap and Aileron Nose Skin Rivet Size (395 and Below)
Filling the Aileron Balance Tube with Lead Shot and Epoxy
1998 Wing Strut Material Update
Source: 1998 Beartracks, Bob Barrows
As mentioned in past issues of the newsletter, we have been involved in obtaining new strut material for use on your BEARHAWK project. This endeavor was initiated due to many builders request.
We have designed and purchased an extrusion die so as to produce the strut shown.
The struts are made from aluminum alloy 6061-T6 and heat treated per. spec. Our supplier has provided us with chemical and mechanical certifications for each lot ordered.
We have also designed new aluminum strut end fittings that can be bolted to the strut material. We can supply this NEW strut material and the drawings for the end fittings for shipment inside and outside the U.S.A. Contact R&B Aircraft for details.