Re: "Garden Rail" 1994 Ross Harrison's 16mm Hunslet (Lilla)
Posted: Thu Feb 28, 2019 12:03 am
Roundhouse cylinders are 9/16" dia by 5/8" stroke
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Ah, standard Roundhouse size then.
I don't follow. Did the company doing the laser cutting also create the CAD files they worked from? You just sent them sketches? What format are the files in since you cannot open them? Just curious as I work with laser cutting (wood, plastic, steel and metals).workwright wrote: ↑Fri Mar 15, 2019 4:24 pm.... A problem of doing this commercially is when your sub-contractor goes into liquidation. So for a third time the receiver did not return my laser cutting files to me. THis time although I had the files I could no longer open them!
Thank you very much for your detailed reply Malcolm!!workwright wrote: ↑Fri Mar 15, 2019 4:24 pm...Hi, I was interested to see the article about the Hunslets I built years ago. ...
A true jewel of a model... (Photo by Kes Jones)workwright wrote: ↑Sat Mar 16, 2019 11:39 am... Have you ever seen the work of Dave Shotter? His 16mm scale 3 1/2 ton Decauville type 1 tank was minute and beautiful in all respects - probably one one the finest models of a loco ever built, It ran for 30 minutes pulling 20 loaded skips at walking pace.
and that's why your advice is so valuable!
It sort of does, but I must admit that I am more interested in your private view, rather than (perfectly understandable) commercial constraints... The only commercial models (40 off) that were sprung were Balwin 4-6-0 tank locos... Not a good project from the commercial side ... It sort of answers your question ..
As you say, it's common practice in 16mm scale and I guess the only way I am going to answer it for myself is by building two examples one with and one without springing, or perhaps build three, with the third one having just equalisation, without springing...So no springing on 0-4-0 locos- too fiddly...
So this confirms to me, that given careful manufacturing, there is no reason to go for this bucket size cylinders as an answer to indifferent handling....Of the products, Hunslet, Tattoo, Wren have 3/8" ID cylinders... I think that problems of poor running are not due to cylinder bore...
No, this is the first time I hear about the gentleman (sadly no longer with us I understand...)... Have you ever seen the work of Dave Shotter? His 16mm scale 3 1/2 ton Decauville type 1 tank was minute and beautiful in all respects - probably one one the finest models of a loco ever built...not watch making, just a model of a prototype made in minature to the drawings....
My 0-6-2 Fowler design is making slow progress, although I got slightly delayed dithering about axle springing arrangements in this one as well...If you get pleasure from making things get to the bench and make...
and that's why I appreciate even more, your time taken to reply to my questions - thank you!...Remember that it is only rarely I have the time to make something for myself ...
Amen to that as well!1) A Chassis must be square
2) Quartering must be precise
3) No enlarging coupling rod holes to achieve free movement(see 2)
4) pinning + loctite is safer than loctite on its own
Marvelous.workwright wrote: ↑Thu Mar 21, 2019 4:18 pm The one, a Beira Raiway Falcon 4-4-0 has all the non commercial gismos. A working crosshead water pump with bypass. Mechanical lubricator and silent gas fired grate with a locomotive boiler - superheaterer- DIsc regulator. The boiler also converts to solid fuel! No clock ticking on this one.beira side.jpg