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A lock washer on a postage stamp engines needle? Cox_ba12




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Cox Engine of The Month
February-2024
1/2A Nut's

"RC Speed Boat Power Drive TD .020"

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Post  rsv1cox Fri Jun 17, 2022 10:57 am

Star type. I haven't seen before. Factory or owner mod? Makes a ratchet sound when unscrewed. Has the needle spring.

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Post  andrew Fri Jun 17, 2022 12:24 pm

My vote is for an owner mod.
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Post  sosam117 Fri Jun 17, 2022 1:57 pm

andrew wrote:My vote is for an owner mod.

I second that vote!
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Post  GallopingGhostler Fri Jun 17, 2022 2:11 pm

An owner mod, may have lacked a Cox needle spring made specifically for the postage stamp engine, or old one got sprung. Lock washer may have coincidentally made a perfect fit. With such, one can substitute a more common cut down ball pen spring, innovation at its best.
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Post  rsv1cox Fri Jun 17, 2022 2:46 pm

I would agree, and would not have questioned it were it not a perfect fit.  It does provide a fine tune of the needle with each slight turn resulting in a "click." You can see the bitter end of the spring in the above picture.  But why would the PO do it?  Seems quite unnecessary.  

Just one of the more interesting things I encounter while playing with these pre-owned models.
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Post  balogh Sat Jun 18, 2022 12:59 am

Bob, the previous owner may have replaced the stock spring with one having larger dia and without the washer the spring would slip over the shoulder of the NV?

I also pull a small washer on the NV to prevent the sealing fuel line from slipping over the shoulder. The fuel line, if cut to proper length, will double as a spring too. (And I have also added a home made screen to this Killer Bee backplate)

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