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Post by ctgspecialist on Oct 16, 2018 7:20:01 GMT -5
I acquired a Airesearch GTC43/44-6-2 compressor APU and was curious what its capabilities are. The name plate says '72 air hp', but I was wondering roughly what pressure to expect from it.
When I run the GTP70-6-2 APUs that have a shaft output, I get about 30 psi of CDP at full speed, no load. I wasn't sure if the compressor unit would be similar? I suppose I could just try to run it and measure it.
Thanks for any insight,
Spenser
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Post by racket on Oct 16, 2018 16:21:07 GMT -5
Hi Spenser
It'll probably be similar or perhaps up to 45 psi
Cheers
John
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Post by ctgspecialist on Oct 16, 2018 20:16:30 GMT -5
OK thanks!
I just started tearing into it... Looks like the air comes off the compressor and there's a check valve too, after the combusters but before the turbine to add more air to the output (must be pretty hot air!).
The starter shows open with a meter, probably has bad brushes or is burned up. I'll probably have to take one off my GTP70's if I want to start it. I'm still evaluating the overall condition of it. The wiring is a little different than the GTP70's and the pneumatic/fuel system looks more complicated as well. Those may take some time to map out.
Spenser
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richardm
Senior Member
Joined: June 2022
Posts: 257
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Post by richardm on Jun 7, 2022 8:30:51 GMT -5
I own one too but with some missing parts. GTC 43 35 stands for gas turbine compressor at 43 pounds of air a minute @ 45b psi It was the first turbine APU ever built by Air research in 1948. There was a problem with those because sometimes only one of the combustor would light up, while the other would send air and unburned fuel directly in the turbine. All later designs hence had only one combustor.
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