BIG bore piston issue..........

It split in half!
Neat paper weight, but what's the story? Is it from a tech school? Salesman sample?

Polished finish. 6" in dia

 

Bookends?

 

Interesting dome configuration.

 

x2 on the training tool, or maybe it was an old hot rodder who figured what they hay. the day i bought my band saw was the day every broken part in my garage got turned into a "teaching tool"

 

6" dia., four rings, probably aircraft.

Mike

 

Maybe aircraft radial engine. R-985??

 

Clever piston design. Lets you replace half that has the most wear at
half the cost.


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Matching ash trays.

 

Someone with too much free time..............

4TTRUK

 

Yep aircraft. Radial engine I would suspect due to the short skirt.

 

Is it exactly 6" diameter or around 6" diameter.
Exactly 6" diameter would be Rolls Royce Griffon.
Most Pratt and Whitney radials were 5-3/4" bore (R-1340, R-2800, R-4360).
Most Curtis Wright radials were 6-1/8" bore (R-1820, R-2600, and R-3350).
Allison V-1710 was 5-1/2" bore. Packard V-2500 PT boat engine was 6-3/8" bore.

 

Actually that is a piston from Optimus Prime. His engine block would separate into several pieces when he transformed into his humanoid figure to allow for his walking motions. Weird you guys didn't already know that...

 

I would start the betting that it is from a Wright radial engine. Boeing built a lot of planes with Wright engines. B-17 had four of the R-1820, and the B-29 had four R-3350s. Both 6-1/8" bore. Loose a little to a saw cut, and your at 6".

 

Griffon had 4 valves per cylinders as did all V-12's from about the 1930's....That's a 2 valve piston....

 

Done the way it is and done well I'd say it was used as a training aid in engine classes at one time or another. Easy to take off the shelf in the classroom and show how a piston was made when you are discussing pistons in the engine class. Nice set of bookends now I'd think.

 

That is pretty damn cool whatever it was for.