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You mght enjoy browsing the installations on full size boats in the Steamboat Association's online Register. John. http://www.steamboatassociation.org.uk/Default.aspx?pageId=1117882

I have a commercially made tool on the same lines as Tel's one. I think it came from Chronos. They are in the catalogue near the bottom of this page but shown as out of stock. http://www.chronos.ltd.uk/acatalog/Myford_Lathe_Compatible_Acessories.html John

Dave, I think your engine will push along more than a canoe. I used to own "Lightning" an 18 ft boat shown here, which sustains the hull speed of around 5 knots with an 1 3/4" + 3" x 2" engine. http://www.steamboatassociation.org.uk/Default.aspx?pageId=1117882 Good luck, John

Nice work Dave! I don't think I've seen a compound engine with a 180 degree crank before - will keep watching with interest. Hope your hand is back to normal. John

Wow Pat, thanks - that is quite a list and has some real rarities that would cost a fortune to buy. Is there an exam later? John

Pat -I think your engine and the boiler to steam it will suit a much larger boat than you have in mind. Take a look at the engine and boat sizes in the steamboat association register crossreference here: http://www.steamboat.org.uk/register/html/x_e_mod.htm

Pat - on the rod half inch thread, after starting the thread square by screwcutting, it would be usual to finish with a die held in a tailstock die holder. You will want a very good polished finish to these rods and it may be best to buy the material ready finished to your size. If you are...

Pat- set over your topslide and machine the rod taper with a tool set right on the centre height, feeding with the topslide. Then chuck the piston and drill a pilot hole; without disturbing the topslide, open up the bore with an upside down boring tool again set carefully on centre height...

Pat - this is great stuff, you are certainly doing your homework! What size of boat do you plan for the engine to push along? About 25 feet? John

Will be a great engine! I'll follow with interest. "The cylinder head is designed to keep the clearance space above the piston to a minimum" - sometimes this can be overdone and cause the cylinder pressure at the end of the stroke to rise above the steam pressure. This lifts the slide valve off...

Hi Frazer, that's a wonderful and very realistic model of Bat! I love the herringbone decking ends at the king plank -a difficult job that you have done very neatly. Does it have a Kitchen rudder for speed and reverse? John.

A friend who is retired patternmaker once told me that his way to make curved spoke wheels is to make just one wood spoke pattern with double shrinkage allowance, and cast as many as are needed for the wheel. These metal spokes are then fixed to the rim pattern. That way they are all identical...

Recently, I've been making a pattern for a steam cylinder on my Myford S7, using various woods and the normal metal turning insert tools. The smoothest finish I achieved was from an old chair leg retrieved from a skip, that I believe was beech. John.

Crikey, full marks to Google for making such a rare book available. It has lots of potential model projects For example (1) the Messrs Dudgeon annular compound at page 277 & 278 & slide valve at 286. It has a central high pressure cylinder surrounded by a low pressure cylinder in the shape of...

Looking through the same book again, there is also information on Maudslay's reversing gear for screw engines - perhaps this is more what Gerald is looking for. It uses four gears instead of a curved Stephenson's link. Hopefully you will be able to zoom these thumbnails. There are also very...

Here is an engraving and part of the description of Maudsley Sons & Field's "simple and effective" valve gear used for oscillating paddle steamer engines. This is from Modern Marine Engineering by NP Burgh 1867. There another page of description. Sorry it disappears into the book fold on my home...

Wonderful Chuck, it sounds just like a veteran car. John

Hi Chillybilly, nice work on that engine! The Steam Boat Association of GB has a boiler design library at http://www.steamboat.org.uk/sbas_boiler_designs.htm I believe the two drum watertube boiler would suit your engine if it's not to be pressed too hard. Hope this may help. (I'll shortly be...

Wonderful build George. Thanks for taking the time to photograph and post the detailed setups for us. John

Hi Mogens, great project, will watch with interest. In the original of the type, is there a drive astern to the paddlewheel? John