Gas jets

[Robert Hornby]

After a couple of years hiatus on the Columbine steam launch, because of my frustration with not being able to raise enough steam to drive the engine with the propeller attached, I have motivated myself to have another go.
So where are we at? Well with a number 10 Jet in the burner i am getting about 75 to 80 % "redness' on the ceramic tile. So thinking I need a bigger jet but unable to source one I opened up my No. 10 with my smallest drill I have which is 0.6mm. however that is Waaaay to big as I had burning gas everywhere.
It was around 5 years ago that I made the boiler and a very kind member of this forum in England went to great lengths to procure for me a No. 10 jet. I was and still am very grateful to him. I have searched my correspondence to find his name without success. (I feel very bad about this)
I would like to obtain another No. 10 and also a no. 12 and maybe a No. 14.
HELP NEEDED.

[Alyn Foundry]

Hi Robert.

Whilst experimenting with various gas jets for my CHUK range of Vacuum engines I discovered Clevedon Steam.

The gentleman, who’s name escapes me, I spoke to on the phone was able to supply 3 different sizes. The company is definitely displaying a number 12 jet with a hole diameter of 0.3 mm in their online catalogue.

https://clevedonsteam.co.uk/products.html#No%2012%20Gas%20Jet

Cheers Graham.

[Zephyrin]

  for gas jets, you may look for "nozzle for 3d printer" , very similar, huge choice... starting usually from 0.2mm dia.
but the thread is different M4.
to enlarge a trifle such a tiny hole in a brass jet, I suggest to use watchmaker's broaches from Bergeon, the finished hole is slightly coned, and polished inside.

[derekwarner]

Clevedon Steam......Jerry Watson.....................clevedon.steam@uwclub.net ............. Derek

[Alyn Foundry]

Thank you, both Zephyrin and Derek.

When time permits I’ll look into those. The prices of the Sievert burners are very high these days a cheap alternative for hot tube ignition would be great.

Cheers Graham.