"Bruce A. Frank" wrote:

The low temp soldering/brazing filler rod is not compatible

with the

TIG

welding process. That "solder" is not really aluminum and

boils out

when

one tries to weld over it. If you can tack weld with that

stuff then

why

not weld up the whole manifold with that process? In my

experience

it is

strong enough. There are also flux coated oxy/acet aluminum

welding

rods

that will do a perfectly adequate, though not pretty, job.

Bruce A. Frank

Perry if you don't want to do this. I will tig tack weld it for

you and

then you can give it to Bruce to be welded or I can give it to my

local

tig welder.
You will then need to pay my welder. I am not good enough yet to

do a

good

overall job. Bruce does a better job than my local tig welder.

Are you willing to weld it Bruce, after it is tig tacked

together? We

have

quite a few of these intake manifolds to make.

Plan B. Get Mike Wills welder to do another one.

Paul Lamar

Yes, I would be willing to weld 'em up.

Bruce A. Frank

Thanks for all the info and the offers to help.  Being located up in

the

Canada makes sending this thing down to the 'states to get welded

would more

pain than it's worth.  I'll resort to plan "C" and build a jig today

to hold

everything where it's supposed to be and get a local shop to weld it.

Perry Casson

That sounds like the best plan Perry.

Paul Lamar

OK guys,
Please educate me as to why an intake manifold cannot be brazed.

You got me. It probably can be. Might not be as strong but is sounds
like it is worth a try.

Paul Lamar

Actually if you use the right alloys and rod, brazing can be very strong. A
lot of race car space frames are brazed together. The joints are stronger
than the base metal. I'm not sure what the fatigue characteristics would be,
but unless your intake is horribly designed, it should not be a structural
part anyway. Brazing should work fine, but it would be heavier than a
regular aluminum intake.

Monty

The AirCraft Rotary Engine NewsLetter.              Powered by Linux.
ACRE NL web site.
http://home.earthlink.net/~rotaryeng/            http://www.linux.org