From: Jim Yanik
Date: 1/22/2004 5:11 PM Central Standard Time
Message-id:

(B2431) wrote in
:

Jim Yanik wrote:

"Well,then it violates basic physics.If you have two voltage sources
of
slightly different voltages,currents DO flow between them.That's a
basic principle. And bimetal TCs are simply millivolt voltage
sources."

Just picking a nit here. All thermocouples are bimetallic by
definition so the term "bimetal thermocouple" is redundant. It's kind
of like saying "8 am in the morning."

Dan, U.S. Air Force, retired


Well,I note you didn't have any argument with the first part of that post.
I apologize for my redundant statement.

BTW,how many of these TCs are paralleled together in one engine?

--
Jim Yanik
jyanik-at-kua.net

I think that depends on the engine. To be honest I no longer recall the number
as it never seemed important to me at the time.

I do know taver gets his jollies arguing and name calling. I do know the
systems I have worked on including TIT, EGT, EPR, IAS, TAS etc.

I know what it's like climbing up the exhaust pipe of an F-4E to connect the
jetcal tester to the EGT probes. I do know what a heat rise test does. I do
know when a thermocouple fails the indicator still reads since the
thermocouples are in parallel. I do know you can see each thermocouple has one
white wire and one green wire attached. The green and white colours are for
chromal-alumel systems.

Anyone who has been following what I have said in this newsgroup and who has
similar experiences can tell you I know pitot-static, engine etc instruments.

I do know if you do a google search on tarver in this and other NGs you will
find some rather outrageous statements and claims. If you confront him on these
and ask for proof you are subjected to personal and sometimes vulgar attacks
instead of independant citations that might back him up.

I choose not to debate him since he is obviously arguing for argument's sake.

BTW, I do not claim to be an expert on thermocouple systems, but I have worked
on recips and trubine engine systems.

Dan, U. S. Air Force, retired