Author Topic: Marine Hot Bulb (Semi-Diesel) Engine Plans and Castings  (Read 3010 times)

Offline AussieRoy

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Marine Hot Bulb (Semi-Diesel) Engine Plans and Castings
« on: August 11, 2016, 12:58:04 AM »
Greetings,

I'm in the process of drawing up the plans for a scale model Tug Boat.  The original Tug Boat was built for my grandparents back in 1921, and was operated by them until 1945, operating mostly as a Gravel Barge Pusher on the Brisbane River in Australia.  The original boat was powered by a single cylinder 60 HP Mercedes Semi-Diesel Hot Bulb Engine.  So far, I've built two Hit & Miss Engines so far, and I'd like to make my next model engine build a Hot Bulb Semi-Diesel Engine.  The Semi-Diesel and Diesel Model Engines built by Find Hansen https://www.youtube.com/user/boksermotor/videos have a big attraction for me, so I'd like to make my next model engine build a Marine Semi-Diesel.

What I'm trying to do at the moment is to find  plans (and ideally castings, but that is probably a very big ask) for a single cylinder Marine Hot Bulb Model Engine.  The physical size of the model engine is not very important, as I plan to size the model boat to suit the size of the model engine.  A semi-diesel engine with something around a 6 inch (150mm) diameter flywheel would make for a good sized model tug boat.

So, if anyone can point me to suitable maringhot bulb engine plans - that would be much appreciated.

Thanks,

Roy

Offline b.lindsey

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Re: Marine Hot Bulb (Semi-Diesel) Engine Plans and Castings
« Reply #1 on: August 11, 2016, 01:05:29 AM »
Hi Roy. I hope someone here may be able to help you with this interesting idea. You might  want to add a brief introduction as well in the "introduce yourself" section and include a link to this thread as well so that the maximum number of people see it.

Welcome to the forum :)

Bill

Offline Jasonb

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Re: Marine Hot Bulb (Semi-Diesel) Engine Plans and Castings
« Reply #2 on: August 11, 2016, 07:54:25 AM »
Model wise you won't find a diesel but you could use some of the parts eg the bottom end of one of the commercial engines and just make alterations to the head etc to turn it into a diesel or hide a plug and run on petrol/colemans.

Off the top of my head ones that have the right look would be

Hubbard from classicmotors http://www.classic-motors.at/modellmotoren/modelengines.htm

"Thomas" made by TS http://www.ts-modelldampfmaschinen.de/produktuebersicht/51-motoren--petrol-engine/374-motor-qthomasq.html

Or something like the Stuart Lightweight, this one built by me


Offline AussieRoy

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Re: Marine Hot Bulb (Semi-Diesel) Engine Plans and Castings
« Reply #3 on: August 11, 2016, 11:12:11 AM »
Model wise you won't find a diesel but you could use some of the parts eg the bottom end of one of the commercial engines and just make alterations to the head etc to turn it into a diesel or hide a plug and run on petrol/colemans.

Off the top of my head ones that have the right look would be

Hubbard from classicmotors http://www.classic-motors.at/modellmotoren/modelengines.htm

"Thomas" made by TS http://www.ts-modelldampfmaschinen.de/produktuebersicht/51-motoren--petrol-engine/374-motor-qthomasq.html

Or something like the Stuart Lightweight, this one built by me ...,,,

Many thanks for that information JasonB.  Both of those web site links look very interesting.     I really like the look of your Stuart Lightweight - nice job !

Many thanks,

RoyG

Offline Jasonb

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Re: Marine Hot Bulb (Semi-Diesel) Engine Plans and Castings
« Reply #4 on: August 11, 2016, 11:33:39 AM »
Roy, It just clicked that yours is a largre 60hp, was it more than one cylinder? if so something like the 3cyl Fairbanks Morse might be more along the right lines. Any photos of the old Merc unit or one like it?