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Homemade Nylon Pushrods, possible?

Old 06-22-2005, 01:10 PM
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FatBoy123
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Default Homemade Nylon Pushrods, possible?



Hello everyone and thank you for your time, I needed some nylon pushrods for my gas powered engine to avoid the RF noise created by the ignition reaching my radio.

But the LHS in my area dose not have any nylon or fiberglass ones, only metal. And since I live out of the USA, I would have to pay a lot extra for shipping and wait a long time.

I was wondering if you kind gentleman could give me some ideas of ordinary household or everyday things or perhaps from the automobile industry that I could use to make my own homemade nylon pushrods and how to attach it to my servos, I would very much appreciate your thoughts.

Sincerely yours,

Mohammad Reza
Old 06-22-2005, 02:22 PM
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Rodney
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Default RE: Homemade Nylon Pushrods, possible?

For a throttle connection, I/d suggest using a hardwood dowel as a pushrod. For rudder and elevator, think about pull-pull . On the ailerons (assuming you use two servos--one on each aileron) short heavy duty metal pushrods work fine. You may be able to find some high pressure nylon hydralic lines that will telescope together to make your own nylon pushrods and guides. You can buy such in 20 foot rolls from Hobby Lobby if you can do mail order to the USA.
Old 06-23-2005, 06:56 AM
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Default RE: Homemade Nylon Pushrods, possible?

Hi Rodney and thanks for your suggestions.

Actually I only need the flixable nylon rod for the throttle connection, as there is no dirct line between the servo and the carburator control arm, (the control arm of the carb is actually OUTSIDE the fusealge) so I have to go with something flixable to go around bends and with wooden pushrods it will be difficult to set up.

Thanks again. []
Old 06-23-2005, 07:08 AM
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exeter_acres
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Default RE: Homemade Nylon Pushrods, possible?

why not regular music wire with a nylon clevis?
Old 06-23-2005, 07:12 AM
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Default RE: Homemade Nylon Pushrods, possible?

Sullivan makes a great pushrod system, but as you said, you cannot get things unless you pay a high price for shipping.

You may move the servo to the area around the engine, I've seen that done, then encapsulate the servo so oil does not get in, then run a short metal pushrod from the servo to the carb linkage.

You can use a metal pushrod with a nylon clevis on the end. That will prevent a metal-to-metal connection and thus will eliminate any possibility of generating RF at that point.

DS
Old 06-23-2005, 08:18 AM
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Default RE: Homemade Nylon Pushrods, possible?

You can use a metel push rod until the pushrod extends outside the firewall about 3/4". Then bend the rod at 90 degrees and epoxy it into a wood dowel. The dowel only needs to be about 1 1/2" long and then have another metel piece come off the front of the dowel and connect to the carb. Make sense?[8D]
Old 06-23-2005, 08:26 AM
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Default RE: Homemade Nylon Pushrods, possible?

Note: With Gas Engines that have a Spark Plug (as opposed to a Glow Plug) RF Intrference from the Spark will travel through a metal pushrod to the radio compartment.

What Fatboy needs is a non metal pushrod. So a "partial metal" pushrod won't do.

Like Rodney said, check hardware stores, Etc. for thin plastic or Nylon tubing.
Old 06-23-2005, 08:40 AM
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Default RE: Homemade Nylon Pushrods, possible?

You're right, Minn. He DID say GAS powered. My mistake, thought he was using glow. But, again, can't he put the servo up there in front?
Old 06-23-2005, 10:33 AM
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Default RE: Homemade Nylon Pushrods, possible?

Thankx for the catch Minn.
Old 06-23-2005, 12:07 PM
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Default RE: Homemade Nylon Pushrods, possible?

If you put the servo up front, I'd suggest you use optical coupling and seperate power to the servo else the servo wires make a nice path for rf back to the receiver.
Old 06-23-2005, 12:56 PM
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Default RE: Homemade Nylon Pushrods, possible?

These gas jobbies are begining to sound like a real pain![>:]

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