Re: 7HP Square Cylinder Dake? - Is this legit steam?
Posted: Sat Jul 08, 2017 5:24 am
I am a bit late to the game here, been busy with any number of things, and actually forgot that this forum existed until for some reason it popped into my head tonight and I remembered to check it.
Life has been too busy for me the last few years.
Luckily I was able to remember my username and password.
My dad built a Dake model, and I made a set of model Dake plans that are pretty accurate.
This engine was successful commercially for special applications such as winches, work in mines, hoists, and a few other special applications.
The Dake design is very close to a Roots design patent that was issues perhaps 25 years earlier (almost identical, with some minor modifications, but I guess enough modifications to get a new patent).
The Roots and Dake designs are shown here:
http://www.aqpl43.dsl.pipex.com/MUSEUM/ ... square.htm
The benefits were that it was a totally enclosed engine when most other steam engines had open crankcases, and thus the popularity in a dirty mine.
I have seen them used as an anchor winch on a boat, I think on this site, and again the totally enclosed design would be very helpful in saltwater on a boat deck.
The clearance between the pistons (2) and the crankcase can be adjusted by removing shims from the crankcase cover.
The engine really has very few parts, and is much easier to make (assuming you can cut and lap a flat surface) than a traditional steam engine with crosshead guide, eccentrics, and all sorts of other parts.
I have started the patterns for a model of this engine, and the crankcase measures 5" across.
I will be cast the engine in either aluminum or perhaps gray cast iron if I get lucky.
The drawings for the model are located here:
http://www.classicsteamengineering.com/ ... opic=946.0
The Dake can easily be reversed if it is fitted with the reversing valve, even while the engine is running.
The reversing valve can be seen in the 3D model in Reply #2 and 3 here:
http://www.classicsteamengineering.com/ ... opic=929.0
Life has been too busy for me the last few years.
Luckily I was able to remember my username and password.
My dad built a Dake model, and I made a set of model Dake plans that are pretty accurate.
This engine was successful commercially for special applications such as winches, work in mines, hoists, and a few other special applications.
The Dake design is very close to a Roots design patent that was issues perhaps 25 years earlier (almost identical, with some minor modifications, but I guess enough modifications to get a new patent).
The Roots and Dake designs are shown here:
http://www.aqpl43.dsl.pipex.com/MUSEUM/ ... square.htm
The benefits were that it was a totally enclosed engine when most other steam engines had open crankcases, and thus the popularity in a dirty mine.
I have seen them used as an anchor winch on a boat, I think on this site, and again the totally enclosed design would be very helpful in saltwater on a boat deck.
The clearance between the pistons (2) and the crankcase can be adjusted by removing shims from the crankcase cover.
The engine really has very few parts, and is much easier to make (assuming you can cut and lap a flat surface) than a traditional steam engine with crosshead guide, eccentrics, and all sorts of other parts.
I have started the patterns for a model of this engine, and the crankcase measures 5" across.
I will be cast the engine in either aluminum or perhaps gray cast iron if I get lucky.
The drawings for the model are located here:
http://www.classicsteamengineering.com/ ... opic=946.0
The Dake can easily be reversed if it is fitted with the reversing valve, even while the engine is running.
The reversing valve can be seen in the 3D model in Reply #2 and 3 here:
http://www.classicsteamengineering.com/ ... opic=929.0