pourin pistons

http://www.enginebuildermag.com/Arti...ston_pour.aspx


Very neat 2 spout ladle

On Feb 10, 4:24*pm, Jerry Wass wrote:
http://www.enginebuildermag.com/Arti...ston_pour.aspx

Very neat 2 spout ladle

Freaky clean foundry, that. Pretty sophisticated permanent mold,
including a permanent, internally expanded core. That ladle and the
two gates enabled the casting to fill rapidly from the bottom without
choking the runners. Very well designed mold.

"Jerry Wass" wrote in message
...
http://www.enginebuildermag.com/Arti...ston_pour.aspx


Very neat 2 spout ladle

Cool link.

Are most aircraft pistons cast or forged???????

On Feb 11, 7:21*pm, "Elliot G" wrote:
"Jerry Wass" wrote in message

...

http://www.enginebuildermag.com/Arti...ston_pour.aspx

Very neat 2 spout ladle

Cool link.

Are most aircraft pistons cast or forged???????

Cast ..

stol wrote:
On Feb 11, 7:21 pm, "Elliot G" wrote:
"Jerry Wass" wrote in message

...

http://www.enginebuildermag.com/Arti...ston_pour.aspx
Very neat 2 spout ladle
Cool link.

Are most aircraft pistons cast or forged???????

Cast ..

I would have guessed "cast" because of the larger temperature
coefficient of forged metal---already have a big enough problem
with the cast pistons, controlling clearance changes with rapid
external temperature changes.

"Jerry Wass" wrote in message
news
stol wrote:
On Feb 11, 7:21 pm, "Elliot G" wrote:
"Jerry Wass" wrote in message

...

http://www.enginebuildermag.com/Arti...ston_pour.aspx
Very neat 2 spout ladle
Cool link.

Are most aircraft pistons cast or forged???????

Cast ..

I would have guessed "cast" because of the larger temperature coefficient
of forged metal---already have a big enough problem
with the cast pistons, controlling clearance changes with rapid external
temperature changes.

Are they a metal reinforced casting, like a lot of auto pistons?

On Feb 12, 9:35*am, "Maxwell" #$$9#@%%%.^^^ wrote:
"Jerry Wass" wrote in message

news


stol wrote:
On Feb 11, 7:21 pm, "Elliot G" wrote:
"Jerry Wass" wrote in message

. ..

http://www.enginebuildermag.com/Arti...ston_pour.aspx
Very neat 2 spout ladle
Cool link.

Are most aircraft pistons cast or forged???????

Cast ..

I would have guessed "cast" because of the larger temperature coefficient
of forged metal---already have a big enough problem
with the cast pistons, controlling clearance changes with rapid external
temperature changes.

Are they a metal reinforced casting, like a lot of auto pistons?

Probably. I'll find out when I make a cutaway later this year,
I hope. The steel inserts in the piston wall around the pin boss are
to control expansion across the widest axis of a cam-ground piston,
which is 90 degrees to the pin. Aluminum has a coefficient of linear
thermal expansion of almost exactly twice that of steel and an
aluminum piston can get bigger than its steel cylinder without some
control, or else a lot of clearance.
Pistons are usually cast of a high-silicon aluminum for wear
resistance. Machines beautifully.

Dan

stol wrote:
On Feb 11, 7:21 pm, "Elliot G" wrote:
"Jerry Wass" wrote in message

...

http://www.enginebuildermag.com/Arti...ston_pour.aspx
Very neat 2 spout ladle
Cool link.

Are most aircraft pistons cast or forged???????

Cast ..

I would never buy forged parts. Counterfeit parts with forged
documents are usually lower quality.

Dan, U.S. Air Force, retired