Since the change from tail to wing mounted pitot, the manual suggests
attaching the tube to the aileron push rod. I don't know anyone who has
done this, as the both the flexing of the tube at both ends and the
assymmetric load on the stick seem undesirable. Others have routed
smaller diameter tubing aft to the flap closeout but this involves two
quite sharp turns.
The simple direct route can be used by tensioning the tube at both ends
in p-clips or blocks. Though it can be seen to be well clear of the
aileron tube (even when inverted) , the factory would not accept even
occasional contact which might happen during pitching manoevres. So how
do you provide periodic attachment down the tunnel ?. Coating with goo
before insertion is fraught and prevents replacement. Head scratching
produced the following. Even with filler on it is easy to determine the
line of the tube accurately enough to drill small holes at the required
periodicity in the undersurface to enter the tunnel. Fold a nylon cord
and poke the doubled end through the hole in the undersurface. From the
root end
fish out the loop with a hook on the end of rod long enough to reach
(watching the ends to make sure they don't disappear through the hole!).
Thread the pitot tube through the loop and pull back all the slack until
the pipe is tightend against the wall. Fill the hole round the cords with
Redux or epoxy. Cut off loose ends and sand smooth.
gemin
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