Recent Posts

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21
Chatterbox / Re: Gardening
« Last post by steam guy willy on May 19, 2022, 03:44:52 PM »
Hi "C", Ok  it is a caddis fly larvae and they make wonderful "Houses" to hide in ?!!!  lots of pics on the web ?!!!!!

"W"
22
Your Own Design / Re: The "2-Bits" V-Twin
« Last post by RReid on May 19, 2022, 03:35:58 PM »
Chris, Kim, Per - Thank you, guys!
Quote
my only concern is if the soft solder would be strong enough to withstand the pounding forces of opening the valve ....
I think it will be strong enough, but if I'm wrong it will be little more than an inconvenience to redo. One cam and the shoulder are a solid piece which is a press fit onto the camshaft. The other cam is more of a running fit, but the solder is applied to the interface area between the cams as well as down to the shaft, so a good area of coverage. If proved necessary it could be re-soldered with hard, or a locking pin could be easily added, or it could be completely remade as the one piece unit originally planned.

A big part of this project for me is the education I get from figuring things out for myself, in addition to tapping into the knowledge and experience of others. In that respect, mistakes add to knowledge, and experimenting with methods when the consequences are not overly critical or expensive (in time or $$), then I'm happy add to my personal database of what does work or does not. :thinking:

It also must be remembered that this is not an F1 engine. ;) The rated horsepower of the originals was listed at a mere 1500 rpm.  :)
23
Specific Engine Help / Re: Worthington pump engine question
« Last post by crueby on May 19, 2022, 03:23:42 PM »
Hi Derek,
They do not have plans for that engine, and have not done any disassembly on any of it either, no documentation on its internals. They did have all that at one time, but it was stored in a tower section of the building that collapsed years ago.   :'(
The plans/docs for thier Leavitt engine are a real loss, that one is a very unique engine. They do have original plans for the Allis triple compound engine, I have a copy of those and have been converting them to a 3D CAD model for them, they have already used some cross sections from the CAD model for signage at the museum. This is the Allis engine there, the pump chambers are in the basement underneath, it is very similar in design to the Holly and RD Wood engines:



24
Specific Engine Help / Re: Worthington pump engine question
« Last post by derekwarner on May 19, 2022, 03:05:31 PM »
 Asbestos...  :thinking:...."probably due to it being removed when they turned the building into a museum"......

This is certainly a most logical reason for the insulation [galvanised sheeting over asbestos] having been previously removed

[I experienced such an experience with a BHP-Engineering Contract assignment, where the Materials Engineers found traces of asbestos on the shell of a MAN-GHH axial turbo compressor that was shut down for planned rotor upgrade

The shutdown was delayed for 4 1/2 days with the compressor wrapped in a plastic shell balloon to allow Hazardous Materials workers de-contaminate the machine...complete with de-containment chambers & showers for 'in-out' workers etc]

So yes, a plausible reason for heat containment insulation and covering sheet lagging to have been removed  :ThumbsUp:

Chris......could you ask for a functional machine schematic?......that would confirm the function of the item

Derek
25
Specific Engine Help / Re: Worthington pump engine question
« Last post by crueby on May 19, 2022, 02:49:08 PM »
Thanks guys!  The lack of insulation is probably due to it being removed when they turned the building into a museum, and did not want exposed asbestos wrap all over the pipes.
26
Your Own Design / Re: Longboy's "SILO" Model Engine!
« Last post by crueby on May 19, 2022, 02:45:43 PM »
That one will need to run on grain alcohol!!
27
Tooling & Machines / Re: Going over to the dark (CNC) side!
« Last post by Jasonb on May 19, 2022, 02:40:21 PM »
My castings turned up today and I'm quite pleased with how they came out particularly as it was my first pattern with a core. External surface finish could have been a little smoother but I think that is one of the problems with airset as they don't seem to sieve any fine sand on first and just ram it up in one thick layer which can leave the sand surface a bit porous so the iron replicates that. These are the bits from my patterns



The bit of writing that  was a last minute addition turned out quite well, easily read yet out of sight for most that will view the model.





And here is the rest of the "set" including the scotch yoke which is a brass casting and the spun brass piston which will give it a thin wall and light weight which should help with running. There is also a flywheel casting which I forgot to include in the photo.



I just need to catch up with Graham now who is posting good progress over on his Facebook Page
28
Engine Ancillaries / Re: 1/4 " spark plug copper washers
« Last post by Vixen on May 19, 2022, 02:30:24 PM »
Hello Stuart,

Reducing the diameter of the tapered expander above the desired diameter, means you don't have to fight the copper ring off the taper.

Mike
29
Engine Ancillaries / Re: 1/4 " spark plug copper washers
« Last post by propforward on May 19, 2022, 02:19:29 PM »
Nifty solution - I really like the tapered expander idea.
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Engine Ancillaries / Re: 1/4 " spark plug copper washers
« Last post by Vixen on May 19, 2022, 01:11:34 PM »
Great result that easily can be copied by others  :ThumbsUp:    :cheers:

Per

Thank you, Dan and Per,

Per, that's exactly why I go to the trouble to write up and post my methods.

I now have far more plug washers than I can possibly loose (use) in a lifetime: so if anyone sends a stamped/ self address envelope they can have a few for free.

Mike
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