Office of Steam Forum for Model & Toy Steam Gas & Hot Air Engines

The Regular Stuff: Chat, Buy, Sell, Off Topic, etc. => General Discussion - Model & Toy Steam Engines – Stirling Cycle – Flame Lickers – Small Antique Originals => Topic started by: canoeont on August 25, 2019, 12:31:02 pm

Title: Re: Reversing of model double compound steam engine
Post by: SeeSteam on August 25, 2019, 04:54:33 pm

With compound engines (piston plumbing in series rather than in parallel), the steam lines matter a lot.

In the Woolf configuration, the two cylinders are 180 degree apart so the exhaust from the HP cylinder feeds the LP cylinder directly. If you have it 90 degrees apart, you need to have a "receiver" that acts as a buffer.

Title: Reversing of model double compound steam engine
Post by: canoeont on August 25, 2019, 12:31:02 pm

I am researching and planning for a model of the Trillium Ferry that runs between Toronto and the Toronto Islands.  It has a double compound engine which will be operational in the model running on compressed air.

One question I need to answer is " Can a compound engine run with one cylinder in forward and the other in reverse"?  To do this the crank would have to be split with one cylinder driving each side and the paddle wheel attached to each side.  The drawings and photos I have of the engine and engine control levers give the impression this might be how it was configured but I am not sure how the engine itself would handle having one cylinder running in forward and the other in reverse.

Any thoughts or ideas will be much appreciated.