Mamod Boiler for traction engine

Sterling steam nut · Mamod Boiler for traction engine

Hi Folks

,

I'm in need of some information regarding the construction of a mamod boiler, i need to know the procedure mamod use, so i can produce a report for college on engineering processes.

Can anyone help?

Mamodman123

The boilers are sold to mamod as "deep cups" One end cap is soldered inside the boiler kind of like Smarties tube

. Mamod drill the holes for the threads and solder them in using soldering paste and an oven!

I guess the boilers themselves or the "deep cups" are turned up on a lathe or moulded?

SPOKESMAN

The older boilers were simple brass tubes - with soft or hard soldered end caps.

Welcome to the forum - hope you are going to contribute!

Mike

Steve_S

Welcome to the forum! County Durham's a fine place... I'm from there myself originally.

The traction engine boilers have a dividing wall part way along them, so the water doesn't fill the whole volume. The chamber at the front end of the boiler tube was an exhaust chamber on the TE1, the exhaust steam passing from it to the chimney through a large hole.

I don't know if the new ones are still made like this? But I'm sure somebody will soon tell us!

Chris

tmuir

Have a look at the link below and go to 3rd paragraph on page 2 and it tells you a bit about how the boilers are made and even has a copy of photos of the factory circa 1970s.
http://modelsteam.myfreeforum.org/about1491.html

TE1A_man

Steve_S

On the TE1's the exhaust steam passes through the throttle then into the exhaust chamber where quite a bit of it recondenses, especially at the start of the run when things haven't warmed up. The remaining steam passes through the hole into the black chamber (smokebox) where even more of it recondenses, then the remaining steam finally makes it up the chimney. The result being that at the end of the run there is quite a bit of water sloshing about in the exhaust chamber and in the smokebox, which has to be tipped out of the chimney. Also some of the condensate dribbles out of the bottom of the smokebox through the steering rod hole and onto the front axle during the run. I assume that TE1A's don't end up with as much condensate in them, as the exhaust goes straight to the chimney and the exhaust chamber is redundant... if its still there?

TE1A_man

On the new TE1A's, the steam goes streight to the stack from the cylinder, but, the black part in the front is hollow, and all the condensed steam from the stack goes down into there. All you have to do is tip it on it's side ans most comes out. i will take a cue tip glued to a stick and put it down there to clean out all the grease and oil in there.

tmuir

On the Te1a I rebuilt it still had an exhaust chamber as you quiet rightly say is redundent on it.
Mine was an older Te1a dont know if the new Te1as still have that chamber though.

SPOKESMAN

Steve that type of boiler was only used on the TE1s with exhaust throttle - there was no need for it wen the exhaust pipes were routed into the chimney direct. I sure some TE1a's went out possiblywith this type of older boiler - as Malins used up the old inventory of stock boilers - trouble is you can only find out by drilling out te rivets!

Sterling steam nut

Thanks for the reply folks.

i found plenty infor when i dissected a redundant boiler yesterday, the main tube (the cupped bit as one reply referred to) is deep drawn with a blanking press. it was only the insert that i was unsure about, wether it is soldered in or not, thanks for the generous replies. I restore these engines as a part time profession, but rarely buil up from a bare boiler, only if the original is knacked!

tmuir

Glad we could help

Steve_S

SPOKESMAN