GrummanDude
Joined: 15 Jan 2006
Posts: 926
Location: Auburn, CA
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 Posted: Sun Aug 12, 2007 11:46 am Post subject: STCs and otehr BS |
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Friday I spent most of the morning arguing with the DER and FAA
regarding whether or not I need to do testing on the carb heat rise
with my new cowling. My argument was, "Since I didn't change anything
in the path of the carb heat, I don't need to test." Their argument
was. "You don't know if you changed the pressures enough on the bottom
of the engine compartment enough to affect the heat rise with carb
heat. So, you need to test this."
That is total BS and, since there is no way to prove or disprove the
carb heat question, I have to do a flight test, at my expense, to test
the carb heat rise.
This is just one of many examples of total nonsense issues I've had to
deal with regarding the FAA and STCs.
Did you know that since I went from a square inlet to the carb air
intake duct to a round one, that I have to test a stock airplane's
manifold pressure next to mine to show I have as good or better
manifold pressure?
I have to install a completely instrumented $4,000 alternator to test
for alternator temps since I don't have a baffle separating the
alternator from the underside temps. It doesn't matter that the
original Traveler had the alternator exposed to under cowl temps.
Plus, since the test plane has a Power FLow exhaust on it, my STC is
limited to using the Power Flow until I can afford to repeat all of the
testing with a stock exhaust. Why? Because the stock exhaust will have
different temperatures under the cowling and this might cause the temps
on the accessory housing to be too high.
Now, Kevin Lancaster, can you think of any reason to why the Grummans
shouldn't be re-introduced as experimentals?
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I've been creating the installation instructions while installting the
cowling on Brian's plane. Unfortunately, Brian needs to take his plane
before I can get it installed and tested. Here is the dilemma: I need
a plane to use for conformity. I can't use mine because the cowling on
my plane can't be conformed. The cowling for Brian's plane was
conformed to his plane. Since he is taking his plane back without the
testing being completed (with the original cowling re-installed) now, I
need to get a whole new plane and whole new cowling and conform it for
testing. I'm hoping to talk the FAA into letting me use the conformed
cowling on another plane, and, I'm hoping it fits. Plus, I need to do
a lot of new testing now regarding the Carb Heat.
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Gary
AuCountry Aviation
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