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[pembeni]

I have looked through Model Boat Mayhem for many months and have decided that my own ideas could make a contribution.

For me live steam is essential and I thought of many ideas and came up with a 42 inch TID Tug moulding form Kingston Mouldings. Into this I planned to fit a Stuart Turner D10 engine steamed from a Macsteam  4 inch boiler.It should be completely self contained to include Gas Tank, Condenser, Water Tank and water pump. At the same time it should be fully radio controlled and reversible.

I decided to buy the major items to save time orwhere manufacture would be beyond my facilities. Where parts are not available they have to be made in house.

I am surprised that such an approach has not already appeared on the Model Boat Mayhem.

However the task of packing all these elements into the 42 inch tug raised a lot of design difficulties which had to be overcome.

I decided on a non-reversing engine with a Macsteam Reversing Gearbox, partly because I had already had the engine and I expected the valve setting to be easier. I also decided to use a motor driven water pump as this would save steam and I could use radio control to set the degree of water required to keep the boiler at the optimum level.

Any comments on this approach would be appreciated

[Underpressure]

I'm not quite sure if you have started the build or not, but the D10 is a big engine and you may find you have difficulty accommodating the height in a TID.

I have several tugs of around 40" and they have Cheddar Puffin engines, I also have an American tug The Brooklyn, which I am planning on building with the Gage TVR1A slide valve engine. All of these engines are pretty compact and have more than enough power to push a fully ballasted 40" tug at more than scale speeds.

As for buying boilers, engines, gas tanks etc and bringing them all together into one plant, that is the approach I have always taken, as I simply do not have the time or skill required to build everything from scratch.

Keep us posted on your build, especially with pictures, there is a wealth of knowledge here and people are only too happy to offer their opinions / assistance.

Neil 

[mrsgoggins]

Might I suggest that you will be struggling to fit a D10 and suitable boiler into that hull. I started out with the same hull and made a Reeves Borderer engine (1/2" bore X 5/8" stroke twin) fed by a 4"dia x 7" centre flue boiler.
I concluded that the 42" hull would have insufficient displacement so scaled it up to 45". It sails well now at scale speed and runs for 30mins before I top up the feed water tank. The gas lasts for an hour.
A big engine may sound like a good idea but unless the boiler is equally "big" you can rapidly run out of steam.

Have a look at "Live Steam TID" in the Working Boats Section.

Good luck

[pembeni]

Thank you for your comments.

The idea of a Macsteam 4" boiler driving a D10 engine came from the Steam Launch products made by Mainsteam.

The engine does fit in with some 1/2" clearance above the engine

I will try and add some Photographs to show where I am going

Peter

[pembeni]

Hopefully this will show some pictures
Peter

[Underpressure]

Well! Shows how much I know 

Very nice installation indeed, should have quite some 'punch' when you get it on the water.

Please keep us posted and keep the photo's coming.

Neil

[pembeni]

Thank you for your constructive comments.

I realise now that I may have too large an engine to be compatible with the TID and the boiler. These D10 engines seem to be very popular.

It also fits in very well with the scale and position in the tug.

Question. Why not keep the D10 engine  and fit a stainlees steel sleeve 3/4 inch O/D and wall thickness 16SWG. This would reduce the bore to 5/8" to use a  new piston with a silicon ring, and give some 30% reduction in the volume of the cylinders. In addition this should reduce corrosion taking place in the cast iron cylinder and possibly give less friction.

Wonder if anyone has any thoughts on this. Has it been used before?

Peter.

[john s 2]

Why alter the engine at all. Whats a throttle for if not to adjust speed? Surely altering servo throw to give req
speed is all that is needed. Are you going to be using steam pressure and water level sensors? The water
sensing side is harder as you need either a boiler tapping or use sight glass water sensor Nice old tid still
steam at Maldon near me. There are plans to put it back into working order. John.

[KBIO]

Good evening!
Nice setting, but the D10 is greedy in steam.
cheers!