Darn Jim,  you just delete my postings all the time.
I wrote up the Engine Fire thing and told everybody that the fan shroud
on type IVs was magnesium ........ believe it. The DK and other Type II
manual Trannys are also magnesium case.

Stan

On Thu, 29 Aug 2002 20:09:40 -0700 Jim Arnott <jrasite@EONI.COM> writes:
> Doing about 2 minutes of research reveals the following:
>
> Early aircooled engines (25 & 36-40 hp) used AS41 alloy for the
> cases.
> AS41 is: aluminum 4.2% silicon 1%. The remainder is... magnesium
>
> Later 1300-1600 motors used AS21 alloy.  AS21 is:
> 2.3% aluminum, 1% silicon a bit of zinc and manganese and, you
> guessed
> it. Magnesium.
>
> <http://www.northerndiecast.com/mcalloy.htm>
>
> The type IV and wasserboxer case material seem to be a bit more of
> a
> secret. But if someone can come up with the spec, the composition
> is
> just a minute away.
>
> There's also a bit of info on the type2.com website.
>
> Jim
>