Here are some pictures of making the valve gear from the reversing lever through to the Stevenson's links https://scontent.fdad1-1.fna.fbcdn.net/v/t31.0-8/23157362_1893566064305279_1408584520798305365_o.jpg?oh=ad2edef23975e5da6e0d3c6d1c93fe64&oe=5A70DDA7 Many more pictures here https://www.facebook....

Hi, I started off introducing the build of my modified Stuart 6A in the welcome section but I have decided to start again here and work through the build of the engine and then though that of my launch build which is about to start. I modeled the entire modified 6A in Solidworks before starting any ...

Mike, I like the idea of using the 17-4SS and I have the facility to heat treat it myself, I just don't have any. But as you point out, the best way is to reduce the cause of the stress i.e.balancing the valves and I will coat the valve faces with boron nitride which is super slippery, and/or to add...

Yes I agree, but as I stated in my last post, I cannot get it here so it is a pointless debate.

Where I am in Vietnam specialty alloys are harder to come by in small quantities so I have to select from what is available. I would have used hard chromed 4140 hydraulic piston rod shaft as my first preference, this is what I used for the piston rods, but I could not buy it in less than 16mm dia. 3...

Thanks Ken, I will get some more pictures up soon.

I have noted mention of some people increasing the valve rod Dia, I had already made the rods from 316SS, but increasing the size would be relatively easy. I have supported the valve rod at the top in a bushing, and the valves are partially balanced.

Hi CB, Looking at the various steam boat registers, the Stuart 6A is by far the common engine fitted to steam launches in the 1-23ft category. Over the years many operators have found various problems with the reliability of the engine. The 6A was designed primarily as a model and as such little of ...

Hi Guys, My name is Lionel Connell, I am an Australian now living and operating my own business in Da Nang city, Vietnam. Some time back I started building a Stuart 6A, I bought a complete set of workshop drawings by the late Alex Ritchie detailing all of the modifications that he made to the 6A, nu...

Hi, Are you still looking for a draftsman? I can completely model your engine in CAD which proves fitment and clearances of all parts ( unlike the old ink and paper method ), drawing dimensions are then extracted from the CAD model ensuring that no mistakes are made. Machining tolerances can be appl...