TWIN 32 x 38 mm - steam engine for small boats or canoes

A special section just for steam engines and boilers, as without these you may as well fit a sail.
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dampfspieler
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Drain cock operating valve

Post by dampfspieler » Wed Nov 03, 2021 3:45 pm

Kelly,

i received it in the second trial, thank you so much.

Hi all,

to operate the drain cock an operating valve is needed. The idea comes from a friends 5" steam loco. Depending on the requirements, the cylinder drain valves can also be arranged in groups with a single operating valve. Here a sectional view.

Steuerventil_kplt.jpg
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A 2D sketch without dimensions.

Steuerventil_kplt_20211103.jpg
Steuerventil_kplt_20211103.jpg (54.03 KiB) Viewed 2836 times
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The d-slide-valves

Post by dampfspieler » Sun Nov 14, 2021 7:23 pm

Hi,

the slide valve bodies are ready. I have built them from gunmetal bar stock. The valve chests are also milled.

Twin3238_073kl.JPG
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Twin3238_075kl.JPG
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The sliding surfaces of the D slides were finely milled and honed on fine abrasive cloth.

Twin3238_079kl.JPG
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Gland packing nuts and spanner

Post by dampfspieler » Mon Nov 29, 2021 8:25 pm

Hi,

the gland packing nuts are finished. Every nut has six holes 3 mm wide 4,5 mm deep.

Twin3238_091kl.jpg
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Twin3238_090kl.jpg
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Twin3238_089kl.jpg
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Last edited by dampfspieler on Mon Nov 29, 2021 8:30 pm, edited 1 time in total.
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Re: TWIN 32 x 38 mm - steam engine for small boats or canoes

Post by dampfspieler » Mon Nov 29, 2021 8:29 pm

Hi,

how to use the spanner is shown below.

Twin3238_087kl.jpg
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Twin3238_088kl.jpg
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The steam channel in the valve chest body was milled at an angle of 15° so that the resistance to the steam flow is as low as possible.

Twin3238_081kl.jpg
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Re: TWIN 32 x 38 mm - steam engine for small boats or canoes

Post by DetroiTug » Mon Nov 29, 2021 9:22 pm

Hi Dietrich,

Nice work. Here is an idea to secure your packing glands. I made these leaf springs from 1095 steel, then tempered them. Very easy to make.
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Re: TWIN 32 x 38 mm - steam engine for small boats or canoes

Post by DetroiTug » Mon Nov 29, 2021 9:48 pm

A better picture
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Re: TWIN 32 x 38 mm - steam engine for small boats or canoes

Post by cyberbadger » Tue Nov 30, 2021 12:40 am

DetroiTug wrote:
Mon Nov 29, 2021 9:48 pm
A better picture
Looks like a robust solution for self disassembling engines! 8-)

I had a valve packing nut unscrew it self completely this summer. Luckily it didn't really interfere with anything - it just dropped down to the top of the valve slide. I stopped for a few seconds and spun it back on and got on my way. :lol:

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Re: TWIN 32 x 38 mm - steam engine for small boats or canoes

Post by dampfspieler » Sun Dec 12, 2021 9:01 pm

Hi,

some little progress. I have got the crankshaft bearing blocks, the replacement ball bearings, the bevel gear set spiral toothed and some material.

Twin3238_094kl.jpg
the bearing blocks
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Twin3238_095kl.jpg
the original (right) and the replacement (left) ball bearings
Twin3238_095kl.jpg (90.86 KiB) Viewed 2275 times

Twin3238_096kl.jpg
the bevel gear set
Twin3238_096kl.jpg (128.48 KiB) Viewed 2275 times


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Re: TWIN 32 x 38 mm - steam engine for small boats or canoes

Post by dampfspieler » Mon Dec 13, 2021 6:44 pm

Hi.

the parts arranged on a floor plan.

Twin3238_108kl.jpg
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Twin3238_107kl.jpg
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A little movie.
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Re: TWIN 32 x 38 mm - steam engine for small boats or canoes

Post by dampfspieler » Sun Jan 02, 2022 6:07 pm

Hi,

a lot of work was done. The flywheel was turned inside and out. It will attached to the crankshaft with a clamping set. Therefore the hub was turned out accordingly

Twin3238_111kl.jpg
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The columnes were turned to length and the threads for the fastening bolts were tapped. They were made from 12 mm stainless steel.

Twin3238_115kl.jpg
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Twin3238_119kl.jpg
Twin3238_119kl.jpg (34.87 KiB) Viewed 1992 times

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