On 09/15/2010 02:13 PM, Pete Keillor wrote:
On Wed, 15 Sep 2010 12:35:25 -0700, Gunner
wrote:

On Wed, 15 Sep 2010 11:23:27 -0700, Tim
wrote:

On 09/15/2010 10:22 AM, Ned Simmons wrote:
On Wed, 15 Sep 2010 09:51:57 -0700, Gunner
wrote:

On Wed, 15 Sep 2010 08:40:39 -0700, Gunner
wrote:


Here are pictures of my problem child.

http://picasaweb.google.com/gunnerasch/RangerHead#


I'd vee the tab and TIG braze with silicon bronze or other non-fuming
bronze rod. It's easy to do, requires no pre/post heat, and will put
very little heat into the head.

Or drill a hole in the middle of the tab and plug braze it (can you do
that?).

There's certainly lots of surface area there if you could get something
that'd bond across the whole face where the tab and head mate.

Indeed. The hole in the center is an option, as is high temp silver
solder.

But putting a slight grove on the sides and running a tig bead down each
side does sound easy to do.

Silicon or phosphor bronze?

Gunner


I am the Sword of my Family
and the Shield of my Nation.
If sent, I will crush everything you have built,
burn everything you love,
and kill every one of you.
(Hebrew quote)

Wasn't there a thread on here a little while ago about brazing by
tinning each piece, then heating the assembly? Heck, silver solder is
brazing, I bet that'd work.

I was going to suggest that (since I started the thread), but you'd have
to get a whole lot of the thing really hot; I'm not sure what it'd do to
the straightness of the head and the valve guides -- certainly if the
head has any bits of rubber in it the idea is a no-go.

I'm for the TIG brazing, particularly since it's Gunnar who has to come
up with the machine!

--

Tim Wescott
Wescott Design Services
http://www.wescottdesign.com

Do you need to implement control loops in software?
"Applied Control Theory for Embedded Systems" was written for you.
See details at http://www.wescottdesign.com/actfes/actfes.html