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Re: TWIN 32 x 38 mm - steam engine for small boats or canoes
Posted: Sun Mar 06, 2022 4:41 pm
by RNoe
Dietrich:
Very interesting ideas!
The next phase would have the stroke-adjusting disc position controlled by the boiler water level control, to automatically maintain water level...
And yes, I know there are other ways to do that, going back a century and more in time.
'Just for the mental exercise...
RussN
Re: TWIN 32 x 38 mm - steam engine for small boats or canoes
Posted: Thu Mar 24, 2022 12:21 am
by dampfspieler
Russ,
... The next phase would have the stroke-adjusting disc position controlled by the boiler water level control, to automatically maintain water level...
Probably not, the mechanics should remain simple.
There was some little success. The piston rod gland nuts were finished so it is possible to use the spanner to tighten it with the above shown spanner.
- Twin3238_306kl.jpg (67.42 KiB) Viewed 19592 times
I will built the the eccentric rods from several parts.
- Twin3238_307kl.jpg (145.57 KiB) Viewed 19592 times
- Twin3238_308kl.jpg (116.86 KiB) Viewed 19592 times
--
Dietrich
Re: TWIN 32 x 38 mm - steam engine for small boats or canoes
Posted: Thu Mar 24, 2022 12:26 am
by dampfspieler
The outer eccentric bodies were silver soldered.
- Twin3238_311kl.jpg (83.45 KiB) Viewed 19591 times
- Twin3238_312kl.jpg (121.9 KiB) Viewed 19591 times
Now i will mill and saw them as designed.
--
Dietrich
Re: TWIN 32 x 38 mm - steam engine for small boats or canoes
Posted: Fri Mar 25, 2022 3:06 am
by DetroiTug
Good solution to save material.
Re: TWIN 32 x 38 mm - steam engine for small boats or canoes
Posted: Fri Mar 25, 2022 6:02 am
by fredrosse
Additive fabrication, saves material and machining difficulties.
Re: TWIN 32 x 38 mm - steam engine for small boats or canoes
Posted: Fri Mar 25, 2022 2:55 pm
by barts
On additive fabrication: Those who are not familiar with Kozo Hiraoka's excellent series in Live Steam back in the 70s and 80s would do well to examine one of his books or magazine artiles. Although somewhat smaller in scale than stuff many of us are used to, his fabrication techniques which rely extensively on fixturing and silver soldering parts together and then finish machining are well worth examining.
https://www.amazon.com/s?i=stripbooks&r ... _sr_book_1
- Bart
Re: TWIN 32 x 38 mm - steam engine for small boats or canoes
Posted: Fri Mar 25, 2022 4:09 pm
by RNoe
I couldn't agree more about Kozo's books.
I have them all, have studied his multitude of techniques and built two steam locomotives so far.
And silver brazing remains one of my favorite fabrication techniques.
RussN
Re: TWIN 32 x 38 mm - steam engine for small boats or canoes
Posted: Sun May 01, 2022 1:48 pm
by dampfspieler
Hi,
kozos books are one of the best i know.
The eccentric rods are ready. It is a composite construction. The head is soldered to the middle part and that is fixed with three M3-screws to the outer eccentric bodies.
I have built a soldering fixture so all four rods will have the equal length.
- The soldering fixture
- Twin3238_366kl.jpg (64.76 KiB) Viewed 19193 times
- The soldered heads
- Twin3238_367kl.jpg (98.57 KiB) Viewed 19193 times
- The eccentric rods
- Twin3238_379kl.jpg (48.38 KiB) Viewed 19193 times
--
Dietrich
Re: TWIN 32 x 38 mm - steam engine for small boats or canoes
Posted: Sun May 01, 2022 1:57 pm
by dampfspieler
Hi,
then the forks were rounded so they will look nice and go free from other parts. I had built a milling fixture and panned the parts by hand.
- The milling fixture
- Twin3238_391kl.jpg (105.83 KiB) Viewed 19192 times
Then the borings were reamed and the M5 x 0,5 mm threads cutted.
- The finished eccentric rods
- Twin3238_394kl.jpg (33.83 KiB) Viewed 19192 times
- The finished valve rods
- Twin3238_396kl.jpg (41.05 KiB) Viewed 19192 times
--
Dietrich
Re: TWIN 32 x 38 mm - steam engine for small boats or canoes
Posted: Mon May 02, 2022 5:15 am
by TahoeSteam
Dietrich,
Your work looks very good. I have to remind myself the scale that you're building at and how steady and patient you must be.
Love seeing your updates.
Cannot wait to see more