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Remote needle valve extension

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Old 01-26-2019, 06:46 AM
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RacerX9623
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Default Remote needle valve extension

I have a new but model old O.S. 40 FP. It has a remote needle valve arrangement. The plane I want to put it in is cowled. The needle has no hole or Allen to add an extension rod. Any ideas?

In this airplane the needle valve will point down. I can just turn the valve 90deg and mount it through the fuselage. That puts the needle outside the plane. Easy to reach but ugly.
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Old 01-26-2019, 07:11 AM
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TomCrump
 
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I've seen an extension wire soldered to the needle valve, in lieu of being retained by a screw.
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Old 01-26-2019, 08:28 AM
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You can also shrink sleeve a piece of approximately .25" dowel on to it. It works great and can be a little flexible if you'd like it to be.
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Old 01-26-2019, 01:10 PM
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RacerX9623
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I think Iíll cut a slot for a screwdriver. Then drill a hole in the cowl.
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Old 01-26-2019, 03:02 PM
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Originally Posted by RacerX9623 View Post
I think Iíll cut a slot for a screwdriver. Then drill a hole in the cowl.

And that is a good bet!.

If you like, You can also slip a piece of snug fitting brass tube over the needle and solder it in place. Helps guide the screwdriver and holds it in place during adjustments.
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Old 01-26-2019, 04:41 PM
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In the olden days, we also used fuel tubing rather than shrink sleeve. Use enough tubing to get outside of the cowl. Slip it over the needle. Fill the remaining length with dowel, music wire, brass tubing etc. to keep it stiff. Actually, that is how the choke for my current gasser is set up right now...
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Old 02-05-2019, 08:31 AM
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RacerX9623
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Thanks that is all great advice. What I did works for this plane. The engine runs so smooth I think I might put it in something else at some point. For now itís in a Reno p51 I scratch built twenty years ago.
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