More New Heads

On Jan 24, 12:48*pm, " wrote:
On Jan 23, 9:29*am, "

1. *I'm building an aircraft engine, not a dragster.

The "vair has a similar tube port. Some even FLY behind them :-)

2. *I don't know how to weld cast aluminum to mild steel.


Neither do I know how to weld aluminum to steel, but I have used a
steel or copper plate to flow melted aluminum from a MIG onto as sort
of a "cast as you go" way of building up aluminum for further
welding. It might work with a TIG as well?

As for the weakness, with a constitution such as yours I'm sure it
will return ............... or you will find an ingenious away around
the problem.
========================
Leon McAtee

On Jan 24, 9:05*pm, "
wrote:

Neither do I know how to weld aluminum to steel, but I have used a
steel or copper plate to flow melted aluminum from a MIG onto as sort
of a "cast as you go" way of building up aluminum for further
welding. *It might work with a TIG as well?
--------------------------------------------------------------------------

Yes, it does. But I don't know how I could maintain the required
clearance as the 'tunnel' advanced.

There's a strong possibility we are looking at the job from entirely
different points of view. My lack of skill with TIG reflects my lack
of experience. 'Coppering' is fairly common with TIG for automotive
sheet metal repairs but I've never seen a copper with that amount of
curvature. It will take virtually a solid bar to handle the amount of
heat needed with aluminum.

This will sound a little crazy but in my head I've linked the Chugger
project with the cancer, in that success with one means success with
the other.

On Jan 24, 9:05*pm, "
wrote:
On Jan 24, 12:48*pm, " wrote:

The "vair has a similar tube port. *Some even FLY behind them :-)
------------------------------------------------------------------------

The Corvair exhaust port already points straight down. Plenty of room
on the ends of the heads for fins. On the VW the exhaust port is
horizontal off the end of the head. Converting to a tube-type port
would provide no benefit with regard to added fins. Indeed, the
existing port may be defined as a tube-type, plus having the advantage
(over the Corvair) of two bolts vs one.

While comments are always welcome it helps if both parties have some
experience with the engine(s) in question... Or at least looked at
them. Or whatever. A recent post took me to task for "wasting time"
on the early VW engines when the later model was such an obvious
improvement... failing to take into account the economic factors
involved when dealing with an engine, the parts for which remain in
production. For those who might be interested, converting a Type IV
for flight typically costs about the same (or even more) as
overhauling an A65-O200, since the Porsche-types are willing to pay a
premium for the T4... and do not have the option of installing a
Continental.

-R.S.Hoover