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Engine basics => Engine set up tips => Topic started by: James Mills on June 29, 2010, 09:49:40 PM
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Randy,
I've hit some problems with my PA 61/pipe set up on my Tempest (same set up I spoke with you about). I went out this afternoon and couldn't get a needle setting. First flight was a bit fast, opened the needle on the second and was slow and so on. A couple of time when I tried to set the needle I opened it 1-1.5 turns with no change then it would start to sound like a sick Harley. I tried several props, all 12 3-blade, pitched at 4, 4.2, 2.3. I'm wondering if I may have toasted the pipe (there was a horrible smell coming from even after I got home, not sure how to describe it).
Thanks,
James
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Randy,
I've hit some problems with my PA 61/pipe set up on my Tempest (same set up I spoke with you about). I went out this afternoon and couldn't get a needle setting. First flight was a bit fast, opened the needle on the second and was slow and so on. A couple of time when I tried to set the needle I opened it 1-1.5 turns with no change then it would start to sound like a sick Harley. I tried several props, all 12 3-blade, pitched at 4, 4.2, 2.3. I'm wondering if I may have toasted the pipe (there was a horrible smell coming from even after I got home, not sure how to describe it).
Thanks,
James
Hi James
It sounds like the NVA has been removed and installed improperl;y with the holes NOT lining up. OR the fuel feed has a blockage, or trash. It also sounds like you may have fried the pipe ...if the motor ran so lean to cook the pipe and make a very bad smell, It needs to be checked.
The only way to do that is for me to see the power train in person
Randy
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Randy,
Thanks for the help. I thoroughly cleaned the NV assembly and the run seems to be back. See you at the Nats.
James