Post by logotrikes on Jun 13, 2015 6:02:57 GMT -5
Hi All,
I'm brand new to this forum, and to introduce myself, my name is Martin and I'm a retired old dude who wants to get into live steam for the first time...
The idea of Toby in 2 1/2 inch comes from Steve Eaton as a simple-to-build 0-4-2. (Opened out to a 2-4-2 by a member of Chaski) (www.chaski.org/livemachinist). Some of you may be familiar with it. I've sent for the construction DVD, but I'd really like to scale it up to 5 inch.
I've got 50 years behind me as a fitter/welder cum machinist and I know my way around metal, but live steam is new territory.
A couple of questions if I may...
I'm concerned that a simple doubling up the dimensions isn't necessarily correct, or how it would affect things like the eccentric throws, bore and stroke etc.
I'm not too worried about retaining 'scale' appearance, and I'm sure I can come up with something that 'looks' right, but critical dimensions might be a different matter. So is it a question of just doubling up motion dimensions for example? I'm aware that loco's do get upscaled but not knowing a lot about live steam leaves me floundering, especially if I was to double up dimensions which need some other formula.
Any ideas anyone? Any and all help appreciated.
Cheers, Martin
I'm brand new to this forum, and to introduce myself, my name is Martin and I'm a retired old dude who wants to get into live steam for the first time...
The idea of Toby in 2 1/2 inch comes from Steve Eaton as a simple-to-build 0-4-2. (Opened out to a 2-4-2 by a member of Chaski) (www.chaski.org/livemachinist). Some of you may be familiar with it. I've sent for the construction DVD, but I'd really like to scale it up to 5 inch.
I've got 50 years behind me as a fitter/welder cum machinist and I know my way around metal, but live steam is new territory.
A couple of questions if I may...
I'm concerned that a simple doubling up the dimensions isn't necessarily correct, or how it would affect things like the eccentric throws, bore and stroke etc.
I'm not too worried about retaining 'scale' appearance, and I'm sure I can come up with something that 'looks' right, but critical dimensions might be a different matter. So is it a question of just doubling up motion dimensions for example? I'm aware that loco's do get upscaled but not knowing a lot about live steam leaves me floundering, especially if I was to double up dimensions which need some other formula.
Any ideas anyone? Any and all help appreciated.
Cheers, Martin