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    Thanks WLIU

    Thanks WLIU
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    History question

    When did exhaust valve rotators first turn up on aircraft engines? WWII or earlier? What engine was first? Radial or opposed first? Questions questions questions.
  3. Thread: Engine swap

    by exftrplt
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    Engine swap

    On a Cessna 172 N with an O320 H2AD engine. If we change to an O320 D2J engine. Would you consider this to be a major alteration or a minor alteration?
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    Gentlemen, please accept my apologies for my...

    Gentlemen, please accept my apologies for my lack of clarity. There are orifices and there are orifices. There is the orifice that is in the flow when the compression test is being performed. The...
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    I'm not making myself clear. For years we had...

    I'm not making myself clear. For years we had compression testers without calibration orifices. With this tester any cylinder that had leakage to below 60 psi "failed". Then someone ( I think...
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    I obviously am not making myself clear. I know...

    I obviously am not making myself clear. I know how to do a compression test. I know examining the cylinder for the source of leakage is more important. However for years we did compression tests...
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    Cub Builder While I agree with your comments,...

    Cub Builder
    While I agree with your comments, I'm still in the dark about the sizing of the orifice. Who decided that .040" was appropriate? What was the basis for that decision? Just happened to...
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    Compression Tester Orifice

    Can anyone tell me where I can find how the size of the calibration orifice in the compression tester was determined? Theoretically would the orifice size change for each type of engine?
  9. Thread: Lean of Peak

    by exftrplt
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    Thanks to all. I conclude that I need more than...

    Thanks to all. I conclude that I need more than just one CHT and one EGT to do this. Once again, thanks for you inputs.
  10. Thread: Lean of Peak

    by exftrplt
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    5,511

    Lean of Peak

    Is it possible to run a Lycoming 0320 H2AD - carbureted - lean of peak? If yes how?
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    Hand held com. issues

    What am I doing wrong? I am trying to use an ICOM A-20 and or an A-21 Hand held through a Sigtronics Intercom. I have tried both an A-20 and A-21 with a Sigtronics SP012 and a SPO22. I am using a...
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    I should have mentioned that the L2, L3, and L4...

    I should have mentioned that the L2, L3, and L4 all have steel tube fuselages covered with fabric.
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    Antenna Question

    We are planning on installing an antenna with an antenna lead to connect to a handheld in 3 L-Birds. Any recommendations as to top or bottom antenna location? The ignition system on these airplanes...
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    Thanks for all your comments. I will be using...

    Thanks for all your comments. I will be using the mic. with an ICOM hand held. I understand that all US aviation radios are designed for a carbon mic. I use the hand held for open cockpit...
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    Boom Microphone

    I have aquired a M-33A/AIC microphone which I would like to use with my flight helmet. The M-33A is a dynamic microphone and I believe it has an impedance of 3 ohms. What do I need to do in order...
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    Now another question - How can I tell the...

    Now another question - How can I tell the difference between a Continental-Wright R-975 cylinder and a Continental 9A cylinder?
    Gennaro
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    Ahaa. What are your thoughts on using it on an...

    Ahaa.
    What are your thoughts on using it on an experimental with a J-6? Or I guess a lamp base is a possibility.
    Thanks for your help.
    Gennaro
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    Your wish is my command. I have hammered on my...

    Your wish is my command. I have hammered on my mikes to get them to bend enough to go to 5.1875 but the won't bend enough. The 5 inch sounds like Wright J-6 but that is clearly...
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    Identification Help

    Can anybody Identify the cylinder pictured? The bore at the base as nearly as I can measure is 5.004 inches.
    Thanks
    Gennaro2624
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    Sorry I can't give the reference, but I believe...

    Sorry I can't give the reference, but I believe the issue is not be capable of being dropped in flight. We have removable drop tanks on our Mig-17, Mig-21 and Sabre. We sometimes fly to airshows...
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    Taylorcraft Speed Brake

    Just a thought. Could you be referring to the spoiler that some of the Taylorcraft L-2s had? I certainly don't recommend trying to install one in an airplane not designed for it. The other...
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    In some states the issue is highway motor fuel...

    In some states the issue is highway motor fuel tax. If you fill the 5 gal. can at the airport you are not paying highway fuel tax and the jerry can could go into your pickup.
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    Bill, I do know of one pilot that uses a T-6 in...

    Bill, I do know of one pilot that uses a T-6 in an aerobatic act including a roll on take off. The airplane is a normal category aircraft and is placarded "intentional spins prohibited" in both...
  24. Thread: C47/DC3 info

    by exftrplt
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    DCpaul is absolutely correct about part 125. You...

    DCpaul is absolutely correct about part 125. You have to get the empty weight up so the the maximum payload is less than 6000 lb. We however have not been much help about operating costs. On the...
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    Bill, I wasn't going to reply but changed my...

    Bill,
    I wasn't going to reply but changed my mind. I assume Boeing acquired the TCDS from North American when they acquired the company. First, Boeing is probably not the organization that placed...
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