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Message
Hi
Rusty;
Congrats on the inspection pass. I'm still waiting for
mine. He said maybe he might come up one evening next week. Maybe. If the moon
is right :-). The chief inspector for BC has been feverently working on trying
to find ways to deny my mods. The regs allow for use of any engines (other than
solid fuel rockets... I wish :-), but as it is a modification to the design,
along with my auxiliary fuel tanks, he really doesn't like it. Not to mention
the weight. Things are actually looking a little more promising now, but due to
the power outage back east, the local officials can't talk to their superiors to
make any decisions. At least that's the story I'm getting.
About your heat shield. I'm surprised nobody has mentioned
the stock heat shield. This is what I'm using and it works fine. It fits
perfectly over the turbo, stands up fine to the heat and best of all it came
with the turbo. I blasted it then painted the outside with engine paint and it
has only discoloured the paint slightly in a few spots.
After Tracy's comments on ground run times a few days
ago, I decided I needed to do a little more testing, so Thursday night I took it
out and ran it at 30" MAP (I want to compare to full throttle on a NA engine)
for 5 1/2 minutes (I was going for 10 but I was on the apron in front of my
hangar when the local air ambulance who is my hangar mate arrived with a
patient, so I had to shut her down) Coolant temp reached 101C (214F) and oil
reached 95C (203F). Before I shut 'er down I taxied down aways to let 'er cool a
little, but after I did shut down and looked under the cowl I realized that the
turbo was still glowing red hot (it was well after dark so easy to see through
the seams in the heat shield), so I quickly restarted and ran at an idle for
another 5 min to keep the oil circulating through the
bearings.
Anyways, my point is that the stock heat shielding seems to
work fine. Maybe I'm missing something here, but I think it's the easiest
solution.
S. Todd Bartrim
Turbo 13B RV-9Endurance
C-FSTB
http://www3.telus.net/haywire/RV-9/C-FSTB.htm
"Whatever you vividly imagine, Ardently desire, Sincerely believe in,
Enthusiastically act upon, Must inevitably come to pass".
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