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Thread: Original equipment?

  1. #11
    Administrator Steve Pierce's Avatar
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    Default Re: Original equipment?

    Quote Originally Posted by Vagabondblues View Post
    Drawing 13350 is for the Lear radio system. The box on the firewall is the Lear omni motor, no idea what that is and the box on the floor under the pilots seat is the Lear ADF. The radios are clearly NARCO units, drawings for the NARCO does not have any power boxes. So....why are the power boxes Lear on Narco radios?
    Can't always rely soley on the drawings I guess from Rick's experience.

  2. #12
    Vagabondblues's Avatar
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    Default Re: Original equipment?

    Quote Originally Posted by Steve Pierce View Post
    Can't always rely soley on the drawings I guess from Rick's experience.
    Occupational consequence. Getting a LOI from the FAA for missing a TY RAP on the print changes you.

    i did not see any other boxes as I have been doing a lot of study of the radio prints to keep my aircraft close to original as possible. I really appreciate the pictures and other peoples experience

  3. #13
    Administrator Steve Pierce's Avatar
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    Default Re: Original equipment?

    Don't research the Luscombe, you'll go into cardiac arrest. Nothing matches the prints. Different world back then I guess.

  4. #14
    Gilbert Pierce's Avatar
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    Default Re: Original equipment?

    Vacuum tube electronics need up to 250 volts dc to operate the tubes. To do that it is necessary to convert the the 12 volts dc to ac, step up the voltages, it takes several different ones, with a transformer and then convert it back to dc. Those transformers in the power supply are heavy. The conversion of dc to ac was frequently done with a mechanical vibtator.
    Conversion of ac back to dc was done with a rectifier vacuum tube. Solid state diodes we’re laboratory laboratory projects only recently invented as were transistors. Each tube, probably ten or more, need 12 volts to a filament to heat the tube which caused the cathode to emit electrons.
    The radios of that era were heavy, hot, and large consumers of power. They were also all hand wired but very easy to trouble shoot but not very reliable by today’s standards.

    To get those radios working you will probably need to find and electronic technician of a certain age. Tubes are available but expensive.
    Last edited by Gilbert Pierce; 08-27-2018 at 08:15 AM.

  5. #15
    dmark1's Avatar
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    Default Re: Original equipment?

    117a0215rta.jpgThe one on the left is a Narco Superhomer. Here is a picture of one I restored for Oshkosh.

  6. #16
    Clayton Harper's Avatar
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    Default Re: Original equipment?

    "Don't Go Changing..." Dual Nav-Comms, WOW. The Super Homer was the first aircraft radio I talked on, in a C-140. May '64. I had just soloed that morning in a 7AC.
    Last edited by Clayton Harper; 08-27-2018 at 05:55 PM.
    The only true wisdom is in knowing you know nothing.
    Socrates

  7. #17

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    Default Re: Original equipment?

    another '50 but fly it home, the kind I like
    https://spokane.craigslist.org/avo/d...665636667.html


  8. #18

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    Default Re: Original equipment?

    Somebody took the project on, the add is off craigslist. Wonder if they actually got 10 grand for it

  9. #19

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    Default Re: Original equipment?

    Amazing time capsule! More pics would be awesome for reference putting my ‘50 together. It appears that plane has aftermarket interior panels?

  10. #20

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    Default Re: Original equipment?

    Two radios, one for the outbound and one to get back home with (with luck)

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