[Stoves] Inverted top lit updraught

[Peter Verhaart]

Dear Crispin,

Perhaps you could use a MIG welder, swapping the Argon with Oxygen.

Regards,

Peter.

On 20/01/2012 04:19, Crispin Pemberton-Pigott wrote:
>
> Dear Peter
>
> >I can't follow Andy's figures for the stoichiometric volumes.
>
> Agreed. He says several things that are suspect.
>
> >C2H2 + 2.5 O2 = 2CO2 + H2O eg 2.5 volumes oxygen for 1 volume of 
> acetylene
>
> >C3H8 + 5 O2 = 3 CO2 + 4 H2O eg 5 volumes of oxygen for 1 volume of 
> propane
>
> Agreed.
>
> In use, propane for cutting has to be held for longer on the surface 
> preheating and the gap is more critical during the cut. It is because 
> of the high gas velocity entraining air (cooling). Restarting a cut 
> that for some reason was stopped requires far more preheating and 
> tends to be messier and the O2 central port needs to be opened more 
> gradually to give the iron time to ignite.
>
> There is a way to make your own cutting torch using iron wire as the 
> fuel! The only gas is Oxygen. They used to use it in the 1920's. It is 
> the appropriate technology way to cut two a inch plate without gas! In 
> the US I think they would call it a Redneck Cutting Torch. /Rooineke 
> gassnyspruitstuk/ in Suid Afrika. Ja. Maybe you would say /rodenek 
> snijbrander/.
>
> Regards
>
> Crispin
>
> ^(TM)
>
>
>
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