[modeleng] Re: Boilers
- From: "Phill Smith" <steam@xxxxxxxxxxxxxx>
- To: <modeleng@xxxxxxxxxxxxx>
- Date: Sat, 7 Jan 2006 23:04:13 +0800
Dave,
Here's another tip.
Use the oxy/acet cutting torch for your local heating for silver braising,
rather than a welding tip. By using the cutting torch with a small tip in
it, a lot of heat is generated by multiple small flames. This gives you more
heat than you can use, but to advantage. It is easy to control the heat
being applied to the area you wish to silver solder, by simply varying the
distance up the long flame feathers that you are using. As you are not
getting close enough to the primary flame (the little bright blue flame) to
use it, it is much harder to burn your copper. Also the number of components
doesn't matter as there is enough heat to evenly heat the whole lot with a
little care.
Cheers,
Phill.
----- Original Message -----
From: "Pendragon" <idpriest@xxxxxxxxxxxxxxxx>
To: <modeleng@xxxxxxxxxxxxx>
Sent: Saturday, January 07, 2006 6:22 PM
Subject: [modeleng] Re: Boilers
> Dave,
>
> A couple of things,
>
> I designed a modified boiler for a friends super simplex, you are =
> welcome to
> a copy of the drawing if you wish. The boiler ends up the same size but =
> the
> barrel / throat plate joint is made easier together with an increase in
> water flow around the firebox sides.
>
> Secondly no one has mentioned over heating the copper when silver =
> soldering,
> many people get the copper too hot, my advice is to do your silver
> soldering outside at dusk [or dawn] at which time you will be able to =
> see
> the temperature colour more easily. I believe that many people overheat =
> the
> copper and do not let the heat soak through the whole joint, this =
> results in
> the spelter not running so they then crank up the heat and destroy the =
> flux.
>
> The correct temperature for easiflow will be seen when the flux turns to =
> a
> pinkish coloured liquidand your solder will then fow easily throughout =
> the
> joint.
>
> Don't get your torch too close either as this will tend to burn the flux
> resting on the surface of the joint.
>
> I always use a propane torch to give some background heat but then use =
> the
> actylene to braze locally, I always JM Tenacity flux which is more =
> expensive
> than the ordinary easiflow stuff but it does have a higher teperature
> working range.
>
> Another point to consider is, are there any local colleges or evening
> classes who could help out.
>
> I live in the Kingswinford area of the West Midlands, if that's not too =
> far
> away I'd be happy to give you a hand.
>
> Regards IP
>
>
>
> "Life should NOT be a journey to the grave with the intention of =
> arriving
> safely in an attractive and well preserved body, but rather to skid in
> sideways, Champagne in one hand - strawberries in the other,=20
> body thoroughly used up, totally worn out and screaming WOO HOO - What a
> Ride!"=20
> =20
> "Never drive faster than your gaurdian angel can fly"
> =20
> Priest & Sons Model Engineers
> http://www.kinvermes.pwp.blueyonder.co.uk/p1.htm
>
>
>
> MODEL ENGINEERING DISCUSSION LIST.
>
> To UNSUBSCRIBE from this list, send a blank email to,
> modeleng-request@xxxxxxxxxxxxx with the word "unsubscribe" in the subject
line.
>
>
>
MODEL ENGINEERING DISCUSSION LIST.
To UNSUBSCRIBE from this list, send a blank email to,
modeleng-request@xxxxxxxxxxxxx with the word "unsubscribe" in the subject line.
Other related posts:
