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Engine basics => Four strokes only => Topic started by: Robert Zambelli on May 24, 2010, 05:00:13 PM
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Here are pictures of the new venturis I make for the OS Surpass 26.
The material is Torlon.
Bob Z.
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Bob what holds it together how about a take apart picture?:
Willis
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Cool.....
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Willis - the venturi is a press fit onto the elbow. With .0005 to .001 interference, the plastic will yield enough to allow a hand press.
A mild knurl and some JB weld for insurance.
Bob Z.
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Bob That is what I figured good idea. Thanks for posting.
Willis
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Bob what is Torlon. Is it part of the Delrin family?
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Bob what is Torlon. Is it part of the Delrin family?
It is a high strenght , high temp plastic, I have some here, however mine is not black it is grey-blue
Torlon® polyamide-imide
Torlon® polyamide-imide (PAI) is a high strength plastic with the highest strength and stiffness of any thermoplastic up to 275°C (525°F). It has outstanding resistance to wear, creep, and chemicals— including strong acids and most organics—and is ideally suited for severe service environments.
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While employed at Northrop-Grumman we were researching some various Torlon compounds, including 4301, a bearing grade variant.
The intent was to find viable alternatives to metallic bushings for aerospace applications.
The material was eminently suitable for the harsh conditions both in corrosive atmospheres (Phosphate Ester fluids) and harsh temperatures.
We evaluated both Torlon and Rulon, both showing excellent characteristics.
When I was a development engineer for Homelite, we used Rulon for wrist-pin buttons.
Since traceability is an issue in aerospace, we could not use the samples for production applications - hence, they went into the trash can and eventually into my stock supply.
Bob Z.