Model Boat Mayhem
The Shipyard ( Dry Dock ): Builds & Questions => Steam => Topic started by: kiwimodeller on November 02, 2009, 08:59:29 am
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Hi, I have just won (but not yet received) on our local internet auction a Warrior vertical twin steam engine and a "Yarrow Type Boiler". Both seem to have been built from plans in old Model Engineer mags or similar with the boiler in particular looking interesting enough for me to bid more than I should have. It has a steam drum at the top with a lot of small diameter tubes sloping down to two smaller drums at the bottom of the legs in the shape of a letter "A". I presume it needs to be enclosed in a housing of some sort? Any info on either engine (is it a Westbury design? Bore? Stroke etc?) or boiler or leads to the original articles would be greatfully received. Thanks, Ian.
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Hi Ian,
If you can post some photos I am sure that there are some mayhemmers who would be more than happy to help. :-))
Derek. :police:
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Oh dear.....I responded back to a different website %%...try Google Ian..........a few details will be available & photographs of the kit are there..............Derek...[in a senior moment]
Hi PD's....very strange.......I just read a posting from Kiwi...about an eBay win..........Warrier MKII A frame steam engine.........went to respond but it has disappeared
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Designer: J P Bertinat
Star Rating:
A modified and improved version of Edgar T Westburys twin cylinder double-acting steam engine (M7) with 3/4in bore cylinders and 3/4in stroke. (Vols.146-147).
Sheet 1 General arrangement on non-reversing engine.
Sheet 2 Cylinder and end covers; piston, piston rods and crossheads; valve chest and covers, slide valves and valve rods, cylinder standard.
Sheet 3 Baseplate, crankshaft and bearings, connecting rod, eccentric rod, strap and sleeve, flywheel.
Sheet 4 Boiler feed pump assembly and details.
Sheet 5 Steam inlet manifold, inlet connector, exhaust manifold, exhaust tee, union and nipple.
Sheet 6 Arrangement and assembly of reversing gear.
Sheet 7 Reversing gear details, special components for single cylinder engine.
Complete set of 7 sheets.
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Kiwi Ian, if you can get hold of a copy of "Model Boilers and Boiler Making" by K.N.Harris, there are various designs including the Yarrow described. On Fleecebay over here recently, a mostly machined "Kit" of the warrior fetched £82.
http://cgi.ebay.co.uk/WARRIOR-Mk11-Vertical-Twin-Cylinder-Engine_W0QQitemZ290361178618QQcmdZViewItemQQptZUK_Trains_Railway_Models?hash=item439adff9fa (http://cgi.ebay.co.uk/WARRIOR-Mk11-Vertical-Twin-Cylinder-Engine_W0QQitemZ290361178618QQcmdZViewItemQQptZUK_Trains_Railway_Models?hash=item439adff9fa)
Regards Ian.
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Hi Kiwi,
Lucky man, I want a Yarrow boiler to steam the D10 i'm building- although i've got some 1/4" x 6.5" x 14" steel tube that I need to get rid of (swmbo!) that would make an equally good multitube vertical.
Yes, you are correct, Yarrows need to be enclosed- most included a feedwater heater made of horizontal tubes which sat on the outside of the watertubes- adding much needed surface area- also a superheater can be added- usually they ran from the dome to a header at the front (fore) of the boiler then looped under the top drum header and back to the superheater header where it would then go to the engine.
They are fast, efficient steamers, good water circulation is required to get the best out of them so a good Yarrow will have at least three columns of watertubes going down to the mud drums and as many rows as can be fitted in. Also the best designs included two large bore tubes at either end comunicating between the top header and the mud drums, one for each one, and at both ends of the boiler.
You will NEED an engine driven feed pump- watertube boilers are faster and safer due to their lower water content, but that also means they run out of the stuff QUICK!
The warrior engine is sold through Reeves now.
Nice little steam plant you have there- would suit a fast launch or torpedo boat hull down to the ground.
Just need some pics now :-))
Greg
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Hi Ian,
The Waimarie has a yarrow boiler, is this one destined for yours.
kiwi
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Harry, just about every steam engine I have had and several of the boilers have been tried out in the Waimarie so why not this one too! The good thing about her is that there is a heap of room inside and also being a paddler with chain drive a change of crankshaft height does not matter too much, I just make up a different chain. Mind you I had also thought it might go well in a certain sternwheeler - hows progress with the hull?
Circlip Ian, I have borrowed the book again from a mate, thanks for the suggestion.
Greg, thanks for all the info, I am looking forward to getting my hands on it and finishing it. It now turns out that the seller has the original magazine articles about both the engine and the boiler and is including them in the deal so they should help a lot. Cheers, Ian.