REFLECTOR: CHT update and sealing up the cabin

[Reiff Lorenz]

>> Also, does anyone know of any rubber bellows to use on the rudder pedal connections to the bell crank?  <<

Geoff,

If you have the upgraded pedals, the factory sells a composite cover for the rudder-pedal interconnect bell crank. It doesn't seal the holes in the canard bulkhead, it covers the entire bell crank area so cold air can't get to the holes.

It didn't come with my brake upgrade kit, but I picked one up when I was in Sebastian in February. It also wouldn't be too hard to make one from scratch.


Reiff Lorenz, Dayton, OH
Velocity XL-RG, 37% complete
Currently working on: Installing 3 more Corbeau A4 seats


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From: reflector-bounces at tvbf.org [mailto:reflector-bounces at tvbf.org] On Behalf Of Geoff Gerhardt
Sent: Sunday, September 30, 2012 7:35 PM
To: Velocity Aircraft Owners and Builders list
Subject: REFLECTOR: CHT update and sealing up the cabin

Guys,

So, I've finally cooled down my hot #3 cylinder.  It had been going up to +430F on climb out.  Some rather aggressive mods to the intake plenum got it down to 420F max so I turned my attention to a combustion problem.  The EGT was always higher than the others and it always peaked first (~20deg before the others).  So, I removed the injector, ultrasonicated it in acetone, twirled a drill bit thru it (#72, I think) as well as cleaned and gapped both spark plugs.  Took it out today when there was a break in the clouds and did an aggressive climb to 10k' - all CHT and EGT's level.  None got above 395F on a full power climb to 10K (it is cool here, tho - ~60F).  Once I got to altitude, I was able to go LOP and #3 didn't peak first - they all peaked very close to each other.  Nice to have that problem solved.

I also piped my oil breather into the exhaust - seemed to work well, no more oil streaks.

Because its starting to get cool here, I'm thinking about cabin heat.  I've been trying to seal up the cabin, but still have lots of drafts.  I've sealed the area between the canard and dog house cover.  I'm debating whether to try to seal the nose gear doors.  Has anyone found a good solution for that?  Also, does anyone know of any rubber bellows to use on the rudder pedal connections to the bell crank?  I've been trying to find something used in maybe from a master cylinder of a car, or maybe a clutch linkage thru the firewall.  If I can't seal up the nose gear doors effectively, then I'll have to try to seal up the slot the elevator push rod goes thru.

Geoff

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