Tina :- Engine and Boiler Build

Gallery, Projects and General > Project Logs

<< < (2/22) > >>

klank:
Thank you all for the very kind encouragement guys. I hope this will still be a worthwhile thread in a few week's time.

Stew - I am in awe of your Southworth and the watchmaker skills you and others post with such gay abandon (!! well you know what I mean) - this basic beginners' kit would be a piece of shlock/ easy peasy for all you guys - knocked off in half the time no doubt.

Bob - yup, I am getting deaf as a post but it is not (yet) affecting my sense of direction. Honestly - I use a Botch Li-Fe batteried drill/screwdriver with a simple adaptor in its chuck to push onto the Z axis drive shaft, with a keyway cut out, in place of the handwheel. Acts as a poor man's power drive up and down (that milling head is d**n heavy). I still cannot remember which way the direction control switch should be for "right and left" on the drill - so I give it a quick pull on the trigger each time and match the chuck movement it to the arrows on the base of the mill. Stupid, I know - but very effective - leaves little chance (ha ha) for getting it wrong - mind you, that's not to say I haven't had the odd coming together under power if you know what I mean?.

Best wishes/respects to everyone

Peter

lordedmond:
Have GLR corrected their drawings for the boiler?

they supply stays but they are not on the drawings ( as supplied to me ) nor is the SWP ?

I have the boiler kit under the bench so to speak , when the current big job is done about 4 years in with another 4 to go ( BR class 4 tank in 5 inch gauge )

Stuart

klank:
Stuart,

You've got me worried a bit now.
The boiler plan, as supplied shows no sign of stays - neither do the various abridged plans, nor text in the boiler build handbook - re-publishing Stan Bray's build articles in the ME.
The full plan appears to be that which was published in the 1950's - going on its style/layout.
Absolutely no mention anywhere of stays - and no Phos. Bronze rodding supplied for this in the materials pack.

I (possibly wrongly) assumed that the boiler was rigid enough by virtue of the fire tubes and gauge of materials and by the lack of reference to stays in the literature. - am I in error here?
If so, I will get back to GLR.

Showing my ignorance - you mention "SWP" - what is this?

Regards

Peter

lordedmond:
SWP Safe Working Pressure

It looks like you got the same reprint plans as I have it does not show stays but they supplied them , when the boiler first came out they advertised it as 80 psi then later they advertised it as a 40 psi unit

DAG Brown has modified one with more tube and fire box stays ( 1/8 copper rivets silver soldered in round the fire box area two row 1 inch centres i believe )

its the stress on the fire box inner that the trouble its very close to the yield point after you have made the boiler i.e. fully soft .

So mine will be stayed

As a note I did make all my boilers ( loco ) but they are to heavy now I need wheels myself ) the one for the current build cost 2.3K Squids

you will not need stays vertically as the tubes will do the job just fine its the fire box inner thats the trouble , its better to over build with stays now than which you had

If you look up the 3 1/2 boiler build by swhart you will find a good guide

http://madmodder.net/index.php?topic=2998.0

Stuart

klank:
Thank you Stuart.

SWP - d'oh - sorry to be so stupid.

The build handbook for the boiler by Stan Bray, mentions :- "Suggest the safety valve adjusted to 40p.s.i. and see how it goes (???!!!). (Quote):- "The nominal working pressure for this boiler is 80psi but its initial test should be to 160psi."
Well that's helpful isn't it!!
In view of those sort of pressures, I would have thought that stays are a MUST - you are absolutely right!.
I shall contact GLR tomorrow about this.

Thanks kindly for the link.

I used to watch the class 4's in and out of Waterloo on empty stock etc. A very handsome design (? Riddles' reverse engineered original Stanier design?) - best wishes for its completion.

Navigation

 Message Index

Go to full version