Hi, I shall do some quick sums and suggest the size of boiler. Is the engine single acting, or double acting? I shall work on 240rpm. as that is a nice speed for little engines. But allowing for running the steam for 500rpm. Then there is some spare capacity. It is easy to reduce flames. Hard to get more heat in!
Simple is the target for this use. Have you ever done any silver soldering of large copper pipes? 2 to 3 in diameter takes a bit more heat than the average little shop blowlamp from an attached gas cylinder.
Cheers!
K2
"How to make a mountain out of a molehill."
The Wig-Wag Engine has been designed to be an easy introduction to model engine making for the beginner, and the vertical wig-wag is the starting model from which the Wig-Wag family is based upon.
Using a simple oscillating cylinder with a 15mm piston bore and a 30mm stroke, the engine runs very well at moderate and slower speeds, on both compressed air and steam, and is a pleasing engine to run and watch.
All the engines from the Wig-Wag family are built from aluminium, brass, steel and phosphor bronze bar stock which is readily available from metal stockists and model engineering suppliers, and does not use specialist castings or difficult to get hold of parts.
The majority of the engine parts are modular in their design, and are common to all the engines in the Wig-Wag family.
Start by building the Original Vertical Wig-Wag, and then choose to build one or more of the family.
Any hobby engineer with a modest workshop will find this an enjoyable build, and the construction covers most of the bases of model engineering such as turning, milling, threading, reaming and boring.
https://wigwagengine.wixsite.com/wigwag
