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  1. I would keep the direct reading oil pressure...

    I would keep the direct reading oil pressure gauge. That is the one most important instrument in the airplane. An electrical failure would render both of your other two options out of service.
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    Sorry Barnstormer, I left out one...

    Sorry Barnstormer, I left out one word......SHOULD. I agree with you, my observations have been the same.
  3. I would be more worried about rock damage on...

    I would be more worried about rock damage on aluminum blades since a ding in aluminum creates a stress riser location. This stress riser could (not always) create a catastrophic blade failure when...
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    https://www.univair.com/supplemental-type-certific...

    https://www.univair.com/supplemental-type-certificates/
    then
    https://rgl.faa.gov/Regulatory_and_Guidance_Library/rgSTC.nsf/WebSearchDefault?SearchView&Query=A-780#
    then...
  5. sj, I seem to recall there should be a large...

    sj,
    I seem to recall there should be a large thick washer between the engine mount and the firewall at the lower bolts. I'd have to check the manual.
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    The Gar-aero modification used stiffer tires than...

    The Gar-aero modification used stiffer tires than the "bush" wheels. They were primarily larger diameter and footprint for off airport use. Many used to grind off the extra rubber making them smooth...
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    Those are not 8:00x4 wheels. The 8:00x4s had...

    Those are not 8:00x4 wheels. The 8:00x4s had expander tube brakes. You have double puck Clevelands which means you have 6" wheels. The wheels on your Cub look like 6" with Gar-aero adapters to 10"....
  8. sj, There is supposed to be a narrow baffle which...

    sj, There is supposed to be a narrow baffle which goes between the oil cooler and the cylinder. Do you have one installed?
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    Even at that, moving towards an open hangar is a...

    Even at that, moving towards an open hangar is a no no. Those rotors move a lot of air and debris when just a little bit off the ground.
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    By the same token why would a helicopter pilot...

    By the same token why would a helicopter pilot knowingly lift off in front of an open hangar? Any helicopter pilot knows that the big fan on top blows a lot of debris everywhere. Airplanes inside the...
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    It is the name for the J-4 in the states also....

    It is the name for the J-4 in the states also. They just were not built in the quantities of the other popular types. Many flyers have never heard of them.
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    With a tube in the middle to keep it stabilized.

    With a tube in the middle to keep it stabilized.
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    These two braces are used to minimize the pulling...

    These two braces are used to minimize the pulling strength of the fabric bending the rib trailing edge, thus jamming the end of the tip bow into the outboard end of the aileron. Look at any fabric...
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    The various Piper tube planes fitting is a thick...

    The various Piper tube planes fitting is a thick aluminum plate which is bent to conform to the outside of the longeron. This thick plate serves as a cushion distributing the compression loads along...
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    Sticky: Hollywood central casting. Is this a scene from a...

    Hollywood central casting. Is this a scene from a Stephen King movie?
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    Bob, This is a good source for springs. ...

    Bob, This is a good source for springs. https://www.asraymond.com/
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    407

    I was thinking the whole fuselage, sorry. ...

    I was thinking the whole fuselage, sorry.

    Take a look at the rear fittings of a Citabria. They are a 6" long piece of 1/2" aluminum which is held to the bottom longerons at a cluster with only...
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    Only 17.4% weight increase will be roughly 17...

    Only 17.4% weight increase will be roughly 17 pounds which will forever be part of the empty weight on that airplane. Not a good idea unless empty weight is not important to you.


    Take a look at...
  19. WTB: This is the certified one....

    This is the certified one. https://www.aircraftspruce.com/catalog/lgpages/rudderarms.php
    This is what it says for the inexpensive one.

    HOMEBUILDERS MODEL
    Rudder Arm, 3/4" Shank, FAA/PMA'd....
  20. WTB: Is this what you want? ...

    Is this what you want? https://www.aircraftspruce.com/catalog/lgpages/rudderarms2.php Cheap enough new and you don't have to match the holes.
  21. Thread: L-21 Javron

    by skywagon8a
    Replies
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    28,803

    I have found that a 1/4" stripe separating the...

    I have found that a 1/4" stripe separating the black and white or whatever your two colors are enhances the look, adding about a million bucks to the visual wow value. An alternate method is to leave...
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    Congratulations, looks like a job well done. Just...

    Congratulations, looks like a job well done. Just a tip, this picture is showing a very low power setting (something like a maximum of 65%) not really conducive for good break in.
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    That is the best way IF you are going to depend...

    That is the best way IF you are going to depend on electricity for your oil pressure reading. Oil pressure being the most critical instrument in the airplane, it is safer not to use two systems to...
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    Google is your friend....

    Google is your friend.
    https://www.univair.com/content/PIP_SB0910A.pdf
  25. Something is very fishy here. Granted my...

    Something is very fishy here. Granted my experience happened in the 80s but the airplane had been sunk in 1959. I bought it sight unseen from a second owner. There was a bill of sale from the person...
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