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Old Feb 21, 2013, 06:32 PM
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Build Log
Intro and Steam Launch build

I ve been building model boats since I was 8. Served in the Navy for 25 years. Spent a lot of time operating and maintaining Navy steam propulsion plants up to 1200 PSI. I have always been intrigued with a model steam plants and thanks to this awesome forum having one is becoming a reality. After hours of review on this site and recommended engines and boilers, I decided on a Graham TVR1A Engine, 3.5 Maccsteam vertical boiler and Maccsteam fuel Tank.


Due to cost I spread out the major purchases over six months. Purchased engine, assembled, and broke in with compressed air. What a great piece of engineering. Over the next 4-5 months saved up and purchased the boiler and fuel tank. Also purchased an assortment of fittings from PM Research. In less than 2 hours after having all the components the engine was purring under live steam.

Model Steam Plant - Initial mock up (1 min 20 sec)
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Last edited by oldnavy; Feb 21, 2013 at 06:45 PM.
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Old Feb 21, 2013, 06:36 PM
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Boiler and fuel tank clad and banded.
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Old Feb 21, 2013, 06:51 PM
Spreckels Lake, GGP, SF, CA
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USA, CA, San Francisco
Joined Apr 2007
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Oh Boy, I am along for the ride!
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Old Feb 21, 2013, 06:54 PM
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After many months of research I decided on plans for a simple launch - The Puffing Muffin from the Model Dockyard. 54 inches, full size plans. Very simple flat bottom construction.





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Old Feb 21, 2013, 07:05 PM
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Basic hull complete enough to start merging power plant to hull.







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Old Feb 21, 2013, 07:50 PM
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Lower section of 2 peice skeg in position. 12 inch Dumas stuffing tube was later installed between 2 upper and lowwer sections of skeg.






2.5 inch, 2.75 inch pitch screw from prop shop via harbor models

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Old Feb 21, 2013, 11:19 PM
Grumpa Tom
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United States, CA, Los Angeles
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Nice!
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Old Feb 22, 2013, 01:02 AM
Taking care of the pond.
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USA, CA, Fresno
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Originally Posted by craig_c View Post
Oh Boy, I am along for the ride!
Me to!
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Old Feb 22, 2013, 01:50 AM
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Denmark, Capital Region of Denmark, KBH
Joined May 2007
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ohh yes reale nice,,,bot it is not the best to clad the gas tank,,,better to just have it be paintet,,,

Regards
Bernhard
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Old Feb 22, 2013, 05:15 AM
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Originally Posted by Bernhard BB View Post
ohh yes reale nice,,,bot it is not the best to clad the gas tank,,,better to just have it be paintet,,,

Regards
Bernhard
Bernhard,
Yes, I may have to end up removing the cladding but I will wait until after sea trials. During bench testing, prior to cladding the fuel tank, I had to throttle down on the fuel valve to prevent lifting safeties. Without cladding I would have to install a fuel pressure regulator.

During bench testing with the cladding and ambient temps of 55 Deg F, Im able to maintain 20 - 25 psi. Normal runs on the lake will be in spring and summer with temps in the 80-90s so I should be able to maintain a higher fuel pressure. Part of the joy of model steam plants is that they always need tinkering.

Your boats are absolutely magnificent.
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Old Feb 22, 2013, 05:29 AM
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ok..haaa .yes thats right always need tinkering.
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Old Feb 22, 2013, 09:35 AM
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France, Bretagne, Dinan
Joined Jan 2012
71 Posts
Hello!
I like the shape of this launch. I am in a hurry to see it finished , she looks nice .
Was she originally made for steam ?
Cheers!
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Old Feb 22, 2013, 11:18 AM
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Hello oldnavy, Did you purchase your running gear through an american vendor or did you have to purchase directly from each vendor. Thanks
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Old Feb 22, 2013, 04:08 PM
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Quote:
Originally Posted by KBIO View Post
Hello!
I like the shape of this launch. I am in a hurry to see it finished , she looks nice .
Was she originally made for steam ?
Cheers!
From Model Dockyard description:
Puffing Muffin
Ref: MM1405
Puffing Muffin: A semi-scale steam launch of 56in. long by 12in. beam based on Windermere type launch. Suitable for Saito or similar steam engine or home built powerplant. Simple wood construction

I am making some deviations from the plan to include more tumble home in transom and no enclosed cabin.
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Old Feb 22, 2013, 04:20 PM
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Originally Posted by Breckalland View Post
Hello oldnavy, Did you purchase your running gear through an american vendor or did you have to purchase directly from each vendor. Thanks
You will find that the USA has limited marine steam related products. Some items are only available from overseas. Below are the vendors I chose. There are many others, just check the first sticky on suppliers and kits of this forum.

Quick summary:
USA Vendors:
National Balsa and Northeastern scale lumber yard for wood
Graham Industries for engine
PM research for steam fittings
Harbor Models for Prop ( Manufactured by the Prop Shop UK)
Dumas for 12' Stuffing tube and 17"shaft

UK Vendors:
Model Dockyard for basic full size plans
Maccsteam Ltd for boiler and fuel tank ( Best bang for buck)
Mainsteam models for oil trap/condensor
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