Sailplane Construction Project Session #129
(On a project like this, sometimes you
take two steps forward and one step back)
One of the benefits of posting these report is
great feed back I get from other modelers that helps keep me out of trouble.
Yesterday I received the following feed back from Bob Angel:
I'd suggest you consider making that drain
hole at least 1/4". Otherwise gummy surface tension probably won't let it
drain, unless you flush it through each flying session with alky or
gasoline. You may also want to consider letting the tube project outside an
eighth of an inch, so the runoff drips away instead of crawling back along
the fuselage bottom when the ship is just sitting. Of course dripping could
be messy itself.
What Bob is talking about of course is the small
aluminum lined 1/8" drain hole I installed in the bottom of the cowl as
This morning I drilled out the 1/8" aluminum tube
and enlarged the drain hole to 1/4" as shown below. By the way, the CA had
really bonded this tube well to the balsa.
As per Bob's recommendation, I cut off a piece of
the larger 1/4" aluminum tubing and slipped it in the drain hole as shown
below. The end of the tube is flush inside the cowl and extends below the
outside cowl surface, again responding to Bob's suggestion. You will also
note that I cut the drain tube at a 45 degree angle on the bottom.
This is a view of the drain tube looking aft at
the cowl. I will not permanently CA the tube in place until after the cowl
has been covered. Thank you Bob for pointing out this problem to
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