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Veco .19 with T.C.C. Cox_ba12




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Veco .19 with T.C.C. Pixel

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Veco .19 with T.C.C.

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Post  ian1954 Wed Feb 26, 2014 5:18 pm

Veco .19 with T.C.C. Veco_110

Veco .19 with T.C.C. Veco_111
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Post  RknRusty Wed Feb 26, 2014 6:57 pm

Gotta have some of that TCC... what is that?

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Post  ian1954 Wed Feb 26, 2014 7:13 pm

Temperature Controlled Clearance

Whatever that is supposed to be!
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Post  Cribbs74 Wed Feb 26, 2014 7:14 pm

Lol yeah what is TCC?

Totally Chromed Cylinder?

Edit: nevermind, I see now
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Post  RknRusty Wed Feb 26, 2014 8:17 pm

Probably an early fancy term for ABC/ABN fits. Such as when the P/C has a tight pinch when cold, and a perfect fit when hot. Or maybe visa versa. Is the Veco an ABC?
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Post  gcb Fri Feb 28, 2014 1:26 am

RknRusty wrote:Probably an early fancy term for ABC/ABN fits. Such as when the P/C has a tight pinch when cold, and a perfect fit when hot. Or maybe visa versa. Is the Veco an ABC?
Rusty
Close but no cigar!

Temperature Controlled Clearance (TCC) was WAY before ABC/ABN. It was an advertising gimmick for a tapered cylinder. By adding taper, the fit was more loose except near the top of the stroke which helped it run cooler. I believe someone tested it by running the engine on a flywheel right out of the box...it did not overheat. Other engines started using either a tapered piston or a tapered cylinder but VECO had already captured the spotlight with TCC. If I remember correctly, this started in early/mid fifties.

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Post  ian1954 Fri Feb 28, 2014 1:57 pm

Thank you George - a fine answer!

I always wondered if developments like tapering cylinders and pistons were planned or discovered by accident.
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