!/2 scale Stanley engine

Ive been working on building my 1/2 scale Stanley engine, right now im fininshing off some patterns and hope to cast them in the next couple of weeks. Would anyone have a interest in one? 2" bore 2 1/2" in stroke and as close as I can make it to the way a Stanly 20 hp is designed.
I figure if im going to go thru all this trouble i might as well build a couple to sell as well.
Here is a picture of the main bearing retainer patterens I made, still have to be set on the match plate but will give you a general idea. Im re doing the frame cross members now and will post a pic of them soon.

Stanley made a number one engine 2-1/2 X 3-1/2 it has a four-inch bolt pattern. There around if you look.
A lot of the parts your making patterns for can be water cut right from plate. If you do CAD drawings, the machine reads your drawings. I’ve had a lot of parts cut this way. Saves a lot of work and time.
Rolly



Edited 1 time(s). Last edit at 05/24/2010 07:29AM by Rolly.

Two leads that might be useful:
Bill Ryan built a 1/2 scale Stanley engine in the mid 1970s and may still know where the patterns are. He is still active with SACA and has a larger engine advertised for sale in The Bulletin. Cell phone: (847) 204-8026.

Tiny Power sells steam engine kits or components that might cover your range. The 2 1/2" cylinder casting kit could probably be bored or sleeved to suit. The price looks good.
[www.tinypower.com]

Graeme

Little bit of progress, just one more frame cross memeber to do, then ill be mounting them on thier plate and get to casting.
I am exploreing the Idea of piston valves If anyone has any good pics please send them over.

A friend of mine stopped over since the last post and wanted to see me cast a part so I did one of the main bearing holders in aluminum real quick just to show him how its done. Here is a pick of the parts fresh out of the mold and still warm.

I am exploreing the Idea of piston valves If anyone has any good pics please send them over.

DFlowers

Do a search on this site there is a lot of stuff.
[steamautomobile.com]

Rollt

dont suppose you know where there is a drawing of a 20 hp stanly block with piston valves? I will just barely have enough room to fit them with out alot of changes.

I bought a Stanley piston valve blue print from the SACA Storeroom a few years back. They should still have them in stock.

dont suppose you know where there is a drawing of a 20 hp stanly block with piston valves? I will just barely have enough room to fit them with out alot of changes.

There were several piston valves blocks made over the years. The first I ever saw was the Gibson block,Frank Cooke had one. If I remember correctly it was an outside admission valve.
The Nergaard block is inside admission, taking full advantage of the valve type. See his add on the bottom of this page. E-mail him.
[www.stanleysteamers.com]

Ok I found the drawings in the store room, but having difficulty with thier pay pal check out. allways something isnt it......

HI DLO owers Tom and I are the ones hoot built David’s piston valve blocks. We have a design for a block for a Stanly that will use 40% less steam than a piston valve we call it the super block. Are you inters did? We are to busy whit are 500H.P super Williams to do any thin about it. Howard

40% less steam, sounds like a dream come true. Yes I would be very interested in building that.

HI Deflowers I am a one-finger typist. I have un limb did long distant I will phone you if you post your number. Mine is 819 – 8765886 the block will fit A 20HP engine is 4.5by5 and strait ports and lo clearness. Howard

Howard I tried to call you a couple of times, kept getting a busy signal. You can reach me at 1-302-507-3930. David

I did some sketch work tonight at work and would be able to fit a 3/4" piston valve and increase the bore diameter to 2.5" as long as i extend the frame rods all the way thru the block. There would be no room for the nuts if i didnt, and would have to be straight ports off the valve to the cylinder. I am exploreing a couple of other Ideas also like increaseing the stroke to 3" and casting the forward cylinder covers and valve covers in place (blind holes) to eliminate a few parts, sealing areas, and lighten it up a bit more. Im used to machining and porting 2 stroke out board motors so this is nothing new as far as ports and such just a little tighter work area. Now to find a suitable sleeve for the valve pistons, need to find something 3/4" with a .063 wall, or ill have to just cut it out of a chunk of iron (which id rather not have to do) and suitable rings. Hmm just sitting here thinking that blind holes may not be such a good idea as my hones will hit before reaching the ends of the bores......
Oh well at any rate I did finish the last frame cross member pattern, ill post a pic of it once i get some laquer on it.
Im still kicking some things around so if any one has some suggestions please throw them out there.



Edited 1 time(s). Last edit at 06/01/2010 11:22AM by DFlowers.

DFlowers-

Back to your original question, I'd be interested in buying a 1/2 scale Stanley engine if you want to build more than one.

Mike
203-208-9660
mjbrookman@gmail.com

Mike, Thank you for your intrest, I am probably 6 months out from having a running prototype to test out so keep watching this topic for progress and I will call you when i have things more together. Right now I am going to start taking my chicken scratch drawings and putting them into cad images while working on some more patterns. The engine block itself may not look like a Stanley because of useing piston valves, but I feel it is definetly a better choice to save on steam and build an engine that can perform work for a long time and not just be a display on a shelf.
Once the engine is completed I will be building a real axle to match so one could use it to get on the road and have some fun.

HI Deflowers I tucked to Tom too night. He will sand you letter whit info. I need your mail address. Howard

I sent you a PM with my address, It was good speaking with you

Progess, Thought id be casting by now

Ok just had to por some metal today, I faced the one off in the lathe and it looks just fine, with no shrinkage issues

What I find baffling in this engine scaling buisiness is power output vs size. Granted, the safety margins get pushed a notch, but a 1/2X scale engine is basically a 10x power differencial in my case. Of course diameters are a 4x multiplier, but the other stuff, rod lengths, rod journels, cross head features etc. As mentioned in a stray post, wish me luck I think, I miniaturized my system to make it affordable to build. The block, crank rods etc., scaled to half. power out went from 100kw to less than 10. Improvements along the way, now I have to implement back into the larger versions. Fascinating stuff scaling is.

One quantification: rod in the mini is 3.25" CtoC with a 10x safety factor. Rod in the 100kw is 6" with a 4x safety factor. But the sizes work for many reasons. Fascinating about scaling is about all I can muster.



Edited 1 time(s). Last edit at 06/06/2010 07:07PM by kdc2.

Thanks Tom and Howard for the drawing of the "super block" It is quite impressive and I can see why it would make more power just from the preliminary drawings. It is a very impressive design, im surprised no one has stepped up to the plate and built it yet.

Ok I have finished the frame cross memeber and main bearing supports now I need to work on the drive gear, I have never cut my own gears before and I am findint it a bit confuseing when selecting the involute gear cutter I need. What I am looking at is a 4" Pitch diameter with 40 teeth
so i guess that gives me a 10 dp cutter? but what if I want a 3.5" pd? This stuff just is not clicking in my head right

You may want to take a look at McMaster-Carr Item 6325K32
[www.mcmaster.com]

Rolly

well thats just too perfect, and not very much money at all. Thanks Rolly I never thought to just buy one. Hopefully thier not too hard so i can trim them up to what i want.

Also, call motion industries, and use a martin part no. to save a buck. I love Mcmaster though.

ok I think i got the gear cutting thing down a bit more now, gotta love you tube. [www.youtube.com]

Nice job. Gear cutting.
What happened to the 4” pitch 40 tooth gear.

That wasnt me, just a video i found that helped me figure out where i was drawing a blank at. I would love to have his dividing head though, mine is just a rotary table with dividing plates but it will still do the job.

If you ever decided to invest in a dividing head, look at the ones that can be driven or rotated by gearing it to the lead screw of the table. That way you can cut a helical gear, or a spiral like a drill flute as well.
Rolly

All files from this thread

File Name	File Size		Posted by	Date
php3wsIE4PM.jpg	28.2 KB	open | download	DFlowers	05/23/2010	Read message
Stanley patterns 002.JPG	286.6 KB	open | download	DFlowers	05/23/2010	Read message
# 1 Stanley engine.jpg	74.1 KB	open | download	Rolly	05/24/2010	Read message
frame cross members 002.JPG	327.4 KB	open | download	DFlowers	05/26/2010	Read message
cast al 001.JPG	482.6 KB	open | download	DFlowers	05/26/2010	Read message
phpZ57AJdAM.jpg	23.7 KB	open | download	DFlowers	06/06/2010	Read message
phpo0AAzJPM.jpg	26.9 KB	open | download	DFlowers	06/06/2010	Read message
phpwzifloPM.jpg	27.9 KB	open | download	DFlowers	06/06/2010	Read message
phpKXjImMPM.jpg	31.8 KB	open | download	DFlowers	06/06/2010	Read message
Dividing head.JPG	146.3 KB	open | download	Rolly	08/02/2010	Read message
phpKdKg5JPM.jpg	65.6 KB	open | download	DFlowers	08/16/2010	Read message
phpDVPepsPM.jpg	48.6 KB	open | download	DFlowers	08/16/2010	Read message