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Dave,
Thanks for the update (below).
The TCM comments re: the Sonic Bleed nozzles are interesting. Assuming the
"Tim @ Lanciar" is Tim Ong - he has (recently) cautioned me against plugging
the sonic nozzles based on his knowledge of folks toasting the Turbos.
So, we seem to have all kinds of (somewhat contradicting) info (as usual).
I have received a couple responses from Walter A and George B to my recent
posts on the LML. Should be a good sideline discussion at APS if you want
to query them further on their opinions.
Going with a few non-believers should be fun!
Rick
rtitsworth@mindspring.com
p.s. I'll be interested to hear how your muffs work once you're flying. I
like the two sided approach. In a couple heat discussions I've been in,
two suggestions have seemed to make sense.
1) Make sure that most all of the potential various cabin "leaks" are
sealed. Spar Box, Controls Rods, Fuel lines, Wires, Luggage Door, etc. And
then add a single small vent in the rear (hat rack) to insure that the cabin
is not pressurizing.
2) Make sure the "flow of air" is front to rear. As you probably know, the
Naca scoop/vent on the vertical stab seems to have the capability to flow
"gobs" of air at relatively high pressure. If cold air (drafts) are
entering from the rear, and leaking out various holes near the front, then
hot air never gets to the back, rather the back passengers are "washed" with
cold drafts.
I'm also interested in where you get the air from that enters the heat
muffs. Seems it would ideally come from the upper side of the engine
baffles (fresher air and higher pressure). But, that is more Scat plumbing.
Theoretically, the pressure below the baffles is lower, to create a "draw"
and help cool the engine. If so, and you get the air from down there, less
air will flow through the muffs and into the cabin (correct)? The air down
there could also be more "polluted" (exhaust leak, oil mist, etc).
Did you consider a couple small Naca scoops on the side of the cowl (similar
to the Legacy) for the air going into the muffs?
I'd love a couple pictures if you have time!
-----Original Message-----
From: DAVE [mailto:dwatermann@hansenplastics.com]
Sent: Tuesday, April 18, 2006 3:11 PM
To: rtitsworth@mindspring.com
Subject: RE: [Lancair_ES] Fuel Injectors SB06-1 and GAMI PRISM questions...
Rick......will certainly look for this stuff for you and take pics if
allowed.
FYI....I spoke to TCM tech named Dave and discussed removing
sonic nozzles and plugging them. He got back to me and said that it was
not a problem, and in fact, I should talk to "a guy named Tim at
Lancair" as he thought they had plugs available. I did not do that....I
just removed mine and turned up a couple of alum. plugs and use the same
hose that held nozzles in to hold my plugs in.
I modified my exhaust pipes and made them longer and at a slightly less
angle that followed the tunnel out of engine compartment. Then I had two
custom heat muffs made....(left and right are slightly diff.) The pilot
side will supply heat to defrost/front seat area.....and the co-pilot heat
muff will supply heat to rear seat area. Each has it's own contol cable.
Have flown in all the spam cans and am always boiling while trying to keep
rear seat pass. "half warm" if you know what I mean, so wanted to try to
get better control in mine. I had also talked to a lot of IV & IVP guys
and they all told me heat from the intercoolers was marginal at
best.....and noisy....especially the un-pressurized guys. Am not flying
yet, so do not know for sure how it will work out....!
Hope this helps you....talk to you next week and let you know what I
found at Ada.....
Dave Watermann
(This is my second trip to course....going for refresher...with 3 other
guys that are non-believers in lean of peak.....so will be fun to watch
the transformation in how they think about their engines!)
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