Member postings for Howard Snowden

Noel, thanks for your advice. I did have some doubts on this, hence my question. I think the powder coating temp is too close to the temperature that can be experienced.

Thanks, Howard.

Thanks for all your responses.

I should have mentioned in my original post, the reason for my question re-temperature of the smokebox casing, is that i am considering having my smokebox for my 71/4" GWR King, powder coated rather than painted.

Many thanks, Howard

Thanks for your thoughts Dave.

Also, the distribution of heat around the periphery of the smokebox will, like the boiler shell, not be evenly distributed. The top of the smokebox will be hotter than the bottom.

Howard

Thanks for your reply Noel.

Following some further research, a model engineer reported that he measured the outside casing of 23 locos and has quoted a range of 250 to 400 deg F from measurements he had taken. This range converts to 121 and 204 deg C respectively. He qualified his figures by saying the measurements were taken when the locos were stationary and will be higher when running on load.

There are of course a number of other factors, the CV of coal being used, the load, the measuring device accuracy and ambient temperature.

Has anyone measured what the temperature of a smokebox casing is of a working loco, I am looking for a number please C or F. Thanks, Howard

Gary, I am a model engineer who lives in St Mary, Jersey. I have sent you a private message with my contact details if you want to meet up. Regards, Howard.

I am told that at Swindon Works they poured hot bitumen into the copper pipes, let it set, do the bending the burn it out. I assume thats how they bent the S bends on the inlet pipes to the Kings and Castles. I have packed dry sand into pipes, crimped the ends up, then bend it to shape, cut the pipe and remove the sand. Obviously the pipe needs to be longer than required to accommodate the crimped ends.

I am told that at Swindon Works they poured hot bitumen into the copper pipes, let it set, do the bending the burn it out. I assume thats how they bent the S bends on the inlet pipes to the Kings and Castles. I have packed dry sand into pipes, crimped the ends up, then bend it to shape, cut the pipe and remove the sand. Obviously the pipe needs to be longer than required to accommodate the crimped ends.

Thanks Brian and Nigel, I have a BR Handbook for loco men so will have a look.

Kind regards

Howard

Does anyone have a drawing any scale, of the quarter turn steam valve that was fitted to BR Std locos to control the steam operated cylinder drain cocks.

Thanks, Howard

Thanks for all your ideas. Howard

Hi, I am about to work on cleading my boiler on a 71/4" g 9F, can anyone from experience advise on the best material to use. I was going to use 26 swg brass, but maybe someone has used a different material that is better to work and form. Thanks Howard.

Many thanks

Hello, can anyone point me in the right direction of someone who supplies insulation material for boiler lagging. Ideally i am looking for material that is 6mm thick.

Thanks Howard

Well done Dean, great project.

For all my boiler fittings and fixtures bolts/set screws/studs and nuts i have used either phosphor bronze PB102 or stainless steel. PB102 has a tensile strength greater than mild steel. Regards, Howard

Thanks Julian, I am building a 71/4" 9F, double chimney version. Regards, Howard.

Thanks Bob, I would have thought that it must be connected to the chimney some how and not just vented into the smokebox.

I am looking for advice regarding the BR Std loco vacuum ejector which is fitted on the left hand side of the smoke box. The steam exhaust from the ejector is directed into the smoke box via a 90 degree elbow. Can anyone tell me where this pipe is connected to inside the smoke box, or is it just vented to inside the smoke box?

Thanks

Howard

Edited By Howard Snowden on 08/09/2017 21:17:12

Can anyone point me in the right direction where i can purchase a small ratchet wheel (3/8" to 1/2" OD) and pawl for the mechanical lubricator i am making. Thanks, Howard.