Refer to page 36A of the plans-----newer plans may be a different page---
The main gear bulkhead fitting as supplied by Vans is a AN837-4D which is a 45*. The internal cabin lines connect there---we use a 90* hose end. Most of the builders that make their extension lines from aluminum have a rather large 90* bend on the bulkhead fitting. Thats because they can make the flare close enough to the tubing bend.
But the AN837-4D is correct bulkhead fitting.
Tom Swearengen, TS Flightlines LLC, AS Flightlines
Joint Venture with Aircraft Specialty
Teflon Hose Assemblies for Experimentals
Proud Vendor for RV1, Donator to VAF
RV7A Tail Kit Completed, Fuse started-Pay as I go Plan, on hold while we develop new products for RV builders