30ft 1890's navy steam launch 1/6th scale

[tghs]

working in 2X actual size drew up a plan for the pump this weekend,, it will be a cross between the coles plans and navy type,, not perfect to scale but hopefully still functional..reduced the line drawings 50% to get sized plan.. this will be a bit of watchmaking for the valve linkages..slim seemed to happy but then realized how fiddlely this will be..waiting on a good sized (by my work) chunk off brass to arrive..

[crueby]

Does that type of pump have the seperate little shuttle valves, operated by the valve rod sending steam to one end of the shuttle or the other? Or is it a direct acting one with the valve rod sending steam directly to the piston?

[tghs]

direct acting, but the valve is operated by the other piston rod, so I guess the would be indirectly direct.. I'm staying very close to the porting,valving and linkages used in the coles.. kind of amazing things, self starting,, there are few vids out of them running.. have kept a watch for a casting kit but no luck..(it would be to big)
<a href="https://www.youtube.com/watch?v=U4yldgtw_To" target="_blank">http://www.youtube.com/watch?v=U4yldgtw_To</a>

[tghs]

the navy most likely could get away with the less complex pump end because they mounted the units vertical with the pump down.. water tanks were mounted higher in the hull so suction would not have been a big issue,, it just had to make pressure to feed the boiler..

[crueby]

Neat stuff!  I've been looking at a few of the designs, and bought plans for the single cylinder one from Friends models as well as the Stuart Turner (didn't know that ST would sell plans separate from the castings before) feed pump. Same general ideas in both, but completely different layout and porting.

[tghs]

with the holiday and weekend I gave slim some instructions for the days I'll be out,, must be that hearing thing again I'm pretty sure I didn't say "do something with your lazy brass over the next few days"  happy thanksgiving... I'm fairly sure he is doing something with the copper and somewhere in the shop is a scale still in the works,,

[crueby]

Theres a Brass for Every Seat...

[tghs]

my lost in transit chunk of brass arrived today,, cut and milled a section that will be the pump end, the cylinder block and some spacers were prepped,, loctited everything together,, slim once again working hard at watching the loctite cure!!

[tghs]

marked out some lines and off to the mill,, recesses cut for the base plate,, steam and pump bores all done as one unit so at least I'm starting out with perfect alignment.. separated the parts with some heat.. slim is still looking skeptical about it all..

[crueby]

Nicely done!

And Slim is not skeptical - he is wondering if he can use loctite to glue some ears onto his head!   

[cnr6400]

Could be Slim's just pointing at something on the drawing with his leg and foot while getting ready to scribe another mark with his hands. It would be mighty handy at times to have Slim's reversible hip joints.      

[simplyloco]

Neat stuff!  I've been looking at a few of the designs, and bought plans for the single cylinder one from Friends models as well as the Stuart Turner (didn't know that ST would sell plans separate from the castings before) feed pump. Same general ideas in both, but completely different layout and porting.

Here's one I restored last year. They do work quite well!
John
<a href="https://www.youtube.com/watch?v=qsZ8-X0BYsE" target="_blank">http://www.youtube.com/watch?v=qsZ8-X0BYsE</a>

[tghs]

taking a mental health day and spending it in the shop,, milled up the sections that will join the ends, both ends need a lot more work before the solder can flow. also will need to turn a set of guide rods for the joining operation.. slim is looking at little more on board with things..

[tghs]

milled up some brass plates and loctited them to the cylinder block, they will become the chest cover and steam passage plate, all will get milled together with the block..  spent the day working out the pump valve seats and water passages,, they are all taken care of..now I have to ram in some plugs where required and start milling and carving it into final shape.. I have a bad feeling slim is thinking about organizing a crap game

[crueby]

    He DOES have a sneaky look about him!