Hey Paul,

Do you snoop around the Canard Aviation Forum?  I ran across this note
from John Slade:

"A quick update for those interested in the T04 Turbo....
I now have 6.6 hours on the new turbo (60.5 on the plane) and it seems
to be behaving very well. But - I have a new problem. EGT. I must have
broken the EGT probe during installation of the heat shield, so I was
getting EGT readings of 500F or so. I installed a new probe, and now my
EGT readings are very high - 1700+ on take-off. Today I backed off the
throttle to get the EGT below 1650 and continued on my trip to Ft Myers,
Venice and back. The engine, turbo and IVO prop performed consistently
well on a 3.3 hour trip. No leaks, stutters or cooling problems - but
this EGT seems very high and it's stopping me from using the power. So
far I'm thinking that the timing may be a little off. (Buly just had a
similar revelation). I don't think it's calibration - these K type
probes are very accurate, and the exhaust is definitely running hot.
Could the T04 somehow increase EGT by passing the gas (excuse me) more
quickly?
Any thoughts?"

That's pretty hot for post-turbo EGT..

Here's a link to a fairly long thread:

http://canardaviationforum.dmt.net/showthread.php?t=2058&page=5&pp=15
<http://canardaviationforum.dmt.net/showthread.php?t=2058&page=5&pp=15>


Matt-

I have no idea what is going on Matt. According to Francois
the unburned hydrocarbons are burning in the exhaust
manifold and or the turbo. Perhaps the RX8 engine might
be a better choice as it supposedly recycles unburned fuel
with a cooler exhaust. Francois is doing some  turbine blade
temperature test by painting the turbine blades with special
paint.

To really know what is going on the intake air temp should
be monitored and the engine leaned over a wide range measuring
the mixture ratio with a wide band mixture monitor to see
what effect this has on TIT. In other words get data on
TIT verses mixture ratio. Could be when leaned properly
with a a cool intake charge to discourage detonation  or
even anti detonation fluid injected  the  data
will show the TIT coming down with a leaned mixture.

On the other hand 1800 F may be no problem for an Inconel
turbine at modest RPMs. Does John have an Inconel turbine?
One needs to know the RPM of the turbine as that has a serious
affect on the life of a turbine blade due to centrifugal force.

Paul Lamar ...No rotor no motor.

Hi Matt, where's your EGT probe mounted?

B
___________________________________________________________________________
Brian D. Cain -/- Dallas/Ft. Worth, TX -/- bdc@bdcmotorsports.com
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