Ok,
I was out in the garage for most of the night tonight, but having a bit
of a problem mustering up motivation… The TV out there helps (or
hurts depending on how you look at it…) Anyway, I started
working on the fuel return line in the tanks… you know... the
ones we don't plan to use :-) They're basically an AN833 elbow
fitting that will be fitted through the outboard rib, secured with an
AN924 nut and capped off with an AN929 cap. As mentioned before,
due to an undetermined fuel injection supplier, and the possibility of
an 'alternative engine' (less likely... but who knows right now) we may
need these, and its a heck of a lot easier to do it now than after the
tanks are sealed up. So, putting the things in is easy... drill a
hole, insert it, and torque the nut... but we want a bulletproof
installation that we don't have to worry about working itself loose due
to vibration or anything else. The plan is to use a combination
of techniques Van's has employed in other parts of the fuel system on
it's RV's. On the exterior we're making these anti-rotation
brackets out of some 1/8" angle. Once riveted to the rib, the
elbow fittings won't be able to rotate. We'll also safety-wire
the caps to the bracket so they can't work their way off. And one
other thing... the brackets could be riveted with AD470 universal head
rivets, but just to ensure there would be no interference with getting
a wrench on the cap should we need to I countersunk the rivet holes and
will install flush rivets.
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