Henry Taylor wrote:

Gidday George, Paul and all,

I am in awe of the fantastic work you have done with your Bellhousing,

George!

Congratulations!!

I would like to field an idea I saw years and years ago that may be an

alternative

to the steel mould and still permit thin wall castings.

The process I saw used a mould that was made of fibre glass. Styro foam

was

injected into that mould to make an item that was then packed with

casting sand

and embedded in a box of casting sand with the necessary risers for

delivering

alloy and permitting air to escape. The molten alloy was delivered to

the mould by

gravity feed. The styro foam was utterly vaporized and no trace of it

was evident

on the thin walled product liberated from the sand.

All sort of like a lost wax process without having to lose the wax.

Well that is my first ever post to ACRE , Paul, I hope it isn't

disappointing.

Cheers.
Henry ( down under :))

Hello Henry,
Good to see you reading your mail, when are you coming over for a visit?
Thanks for the suggestion - Vance has made similar suggestions.
It may be the way to go - some extra expense I assume, but if cut down on
machining that would be good.
George (down under)

 
The AirCraft Rotary Engine NewsLetter.  Powered by Linux.
ACRE NL web site. http://home.earthlink.net/~rotaryeng/            
Copyright 1998-2003 All world wide rights reserved.