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The next order of business was to figure out how to plumb the heated pitot tube into the wing. I decided that I wanted to go with soft aluminum tubing back to the wing root. Time to challenge my tube bending skills> Read on.
This is my pile of sacrificial tubing. When I mounted up my pitot tube to the wing and the cut the wing skins for the pitot tube and mast, I placed the pitot on the outboard rib adjacent to the aileron bellcrank and inspection cover. Hindsight what it is, I immediately saw that I was going to need to do some tube bending. In case I forget to mention later, I love the bender I have below. It is a tight radius bender that will bend up to 180 degrees in one bend. Works GREAT.... I got it from Sears. I have a smaller bender I will be able to use in tight spaces, but it doesn't work nearly as well as the bender below.

I ran the pitot tubing to the wing root to an AN fitting. This is not the final fit up here, I was just checking to make sure that I didn't cut my tubing to short.... Looks dead on to me.

I modified one of the spacer washers so that it could fit flat on the root rib. I am going to prime before I install the AN fitting permanently.

Okay, I had to come up with a way to leave the tubing in the routing hole and then get the tubing bent around to match up with the pitot. This was the simplest bend I came up with. I had one other goal in that I didn't want to follow Checkoways method (Yes, I disagree with Dan's method on rare occasions). Besides, my pitot mast is installed on the inboard rib for this bay and not the outboard rib of the bay as Checkoways is.
http://www.rvproject.com/20020825.html
I didn't want to flex the tubing line in order to mount the pitot to the mast. My method doesn't require me to flex the aluminum tubing to mount the mast.

Because the pitot mast is close to the inspection hole (one bay over), all I have to do is slide the pitot mast up to expose the AN fitting to connect the pitot tube.

So far so good.

Screw the pitot mast back to the reinforcement plate and everything looks great. The tubing lines up perfectly and I didn't have to flex the tubing line in order to install the pitot.

Everything looks good and lines up.

I am pretty happy with how this looks.

I have plenty of space between the wing spar and the aileron bellcrank. I did bend it slightly to center the tubing as close as possible.


I am happy to have this tubing routed. I really wanted to use the more rigid aluminum tubing vs. some of the poly tubing kits I have seen out there. I will probably use the poly tubing kits to tie the pitot system into the wing root.... Okay, what's next??? I can't wait to wrap up these small wing tasks and move onto the fuselage. |