Model Engine Maker

Help! => Specific Engine Help => Topic started by: Gary Brooke on April 10, 2013, 12:28:26 PM

Title: New project
Post by: Gary Brooke on April 10, 2013, 12:28:26 PM
Have the need to build a new engine.Don't know which way to go try something to my own design or to plans. Must be steam,look nice,be able to be made from barstock, and be a challenge to make. Suggestions would be appreciated.
Rgds Gary
Title: Re: New project
Post by: b.lindsey on April 10, 2013, 12:41:29 PM
Gary,  any idea as to the size engine you are looking to make?  There are always Elmer's plans for smaller scale engines or for something a bit larger you may give a look at Ray Hasbrouck's engines....http://hasbrouck.8m.com/

Bill
Title: New project
Post by: ths on April 10, 2013, 01:25:58 PM
Hi Gary,

There are heaps of great engines in the forums' plan section. There are quite a few from Julius de Waal that are worth a close look at. Really well drawn as well.

Hugh.
Title: Re: New project
Post by: Thayer on April 10, 2013, 01:40:01 PM
I don't know your capabilities but the MEM Corliss is definitely worth a look.

Thayer
Title: Re: New project
Post by: Gary Brooke on April 11, 2013, 12:11:55 PM
Bill
The size I'm looking for is something that will fit on a 3.5" lathe and a small vertical slide. Had a look on the internet and am leaning to something with fancy columns .
Thayer
Had a look at MEM Corliss its on the list as a possibility. But would like something a little differant, as there are a lot more talented people building it.
So I will keep on looking I'm sure somebody will come up with the perfect engine.
Rgds Gary
Title: Re: New project
Post by: Jasonb on April 11, 2013, 12:35:43 PM
There are a few French designs that are not too hard to build, the vertical below could have a bit more fancy work added to the four columns if you wanted.

http://jpduval.free.fr/Liste%20des%20plans/Liste_dossiers_plans.html

Or if one big fat fancy column would do you then Anthony Mounts Benson Engine can be made from barstock, do a google search for "building a bigger Benson" to see how I did it though stick with the original scale for your lathe.
Title: Re: New project
Post by: Bogstandard on April 11, 2013, 12:45:25 PM
Even a very basic Elmer's engine can be made to look completely different, with just a little imagination.

This is my version of his 'Mine Engine'

(http://i202.photobucket.com/albums/aa102/bogstandard_photos/Bogs%20pictures/5.jpg)

As long as you stick with the original distances and sizes, you can bling up almost anything to make it look like how you want it.


John
Title: Re: New project
Post by: Gary Brooke on April 23, 2013, 10:16:59 AM
Sorry for the slow reply, but my new puppy Poppy ate my internet cable putting me off line.
Anyway it gave me time to look through all them magazines that one collects. I came across a Rectilinear or Cross Engine by A Mount, any one built one off these. I'm thinking off scaling it up to 1.5 the size are there
any problems with doing this.

rgds Gary
Title: Re: New project
Post by: Jo on April 23, 2013, 10:31:13 AM
No, just opportunities to add more detail  ;D

Jo
Title: Re: New project
Post by: b.lindsey on April 23, 2013, 11:38:11 AM
Nice to see you back online Gary. The main thing is that you settle on something that you have an interest in or feel some connection to as far as adding your own creativity to it.  We'll be following along regardless :)

Bill
Title: Re: New project
Post by: ausdier on April 23, 2013, 02:29:32 PM
A small problem might be the flywheel for the Cross Engine in that the original diameter is 5.312" so half again would make it 7.968"diameter and you said your late was a 3.5" ?
Title: Re: New project
Post by: Gary Brooke on April 23, 2013, 10:00:07 PM
Ausdier thanks for that heads up, how could I miss that. So 3 options smaller flywheel, smaller engine, or anew lathe.
Just a question while I'm thinking about it if I don't run it on steam, will it be possible to use steel for the cylinder.

Rgds Gary
Title: Re: New project
Post by: b.lindsey on April 24, 2013, 12:46:28 AM
Steel would be ok if you keep it oiled and if your air supply is dry. Otherwise some moisture could build up ibside over timwe and cause rust or corrosion. I would use aium., brass or bronze to avoid worry about that, unless you want to go to stainless. As to size, that depends on your budget.  Nothing wrong with a bigger lathe if funds allow, but i would say for now, size the engine to your current machines. Just my two cents.

Bill
Title: Re: New project
Post by: Gary Brooke on May 23, 2013, 02:08:35 PM
Its going to be the cross engine but bigger. I want to add a bit more detail, so just a couple off questions. if I clad the cylinder should the steam chest be done as well. What would be an appropriate wood (have got some nice beech) Then I would like a governor but doing resarch on the net don't know if there should be one and were it goes.
Thanks for all your replies so far.
rgds Gary
Title: Re: New project
Post by: b.lindsey on May 23, 2013, 03:18:12 PM
Hi Gary,
Do you happen to have a picture of the particular engine you have selected to model?  That may help us to visualize what you are working towards and better answer any questions. Its always exciting to begin a new one...and I look forward to following along.

Bill
Title: Re: New project
Post by: Jo on May 23, 2013, 03:55:04 PM
There are a few engines that have clad steam chests, like my S&P  ;), but they are not the norm and unless you are looking to build a model of a specific engine I would not bother.

Like Bill says do you have a prototype in mind?

Jo
Title: Re: New project
Post by: Jasonb on May 23, 2013, 04:24:01 PM
As Jo says not copmmon on stationary engines.

Wood tended to be a bit darker than beech but you could always stain it not that beech takes a stain that well.

Is it a similar Cross engine to Anthony Mounts design? If it is there is a good build of one below

http://www.dampfundmehr.de/im-bau/neubau.htm

You basically have two options for placing the governor. 1 would be to have a modified crankshaft bearing pedestal and put the governor on top of the engine. 2. Put the governor down on the base between the columns

J
Title: Re: New project
Post by: Gary Brooke on May 24, 2013, 11:22:56 AM
Hi, don't have any off my own pictures .I would not like to offend anyone by posting there pictures but if you look in EIM March 2009 there is a picture off what I trying to achieve.
rgds Gary
Title: Re: New project
Post by: Jo on May 24, 2013, 11:40:15 AM
So Gary it is Anthony Mount's Rectilinear or Cross Engine design that has caught your eye.

Anthony has provided a set of drawings and construction notes for a smaller scale version. It is not based on a specific prototype so you can modify it to suit your taste. So scaling up you have to decide what extras you want to add.

Jo
Title: Re: New project
Post by: Jasonb on May 24, 2013, 01:28:04 PM
That would make it the Cross engine. I should think it would be quite easy to go 1.5 times the original which would give a flywheel of just over 8" or even bigger if you have the capacity.

For those that don't take EIM this is the page from the casting suppliers

http://www.pollymodelengineering.co.uk/sections/stationary-engines/anthony-mount-models/crossengine.asp

J
Title: Re: New project
Post by: Gary Brooke on February 25, 2014, 02:28:55 PM
Hi all its been a long time since you heard from me. Ive been extremely ill for the last ten months off into dark places you don't want to go.Finally some good news my consultant has given me the all clear to get back into the workshop. so after watching for so long I can  finally move on. Thank you all for the posts that have kept me inspired for so long.
Before I see what the state the shed is in after all this time a quick question when rescaling a design and the fastenings don't fall on a standard size do you make them bigger or smaller best wishes to you all Gary.                                   
Title: Re: New project
Post by: Heffalump on February 25, 2014, 02:31:31 PM
Glad to hear you are up and about Gary
Title: Re: New project
Post by: Jo on February 25, 2014, 02:38:18 PM
Pleased to hear you are back in the land of the swarf makers  ;D

When rescaling a design and the fastenings don't fall on a standard size do you make them bigger or smaller best wishes to you all Gary.                                   

It depends....

If you are scaling down and it is load bearing: larger, but make sure you have sufficient space for the nuts  :mischief:. 

If you are scaling up then the fastners are probably already oversized so you can go down  :naughty:.

Jo
Title: Re: New project
Post by: Jasonb on February 25, 2014, 02:44:26 PM
Good to see you back with us Garry

ON the two Anthony Mount engines that I have made bigger versions of both would have ended up with some very oversize fasteners if I had used the same multiplier on them so I would go smaller.

J
Title: Re: New project
Post by: b.lindsey on February 25, 2014, 05:17:18 PM
Welcome back Gary. Jo and Jason both offer good advice. Since strength of fasteners is usually of less concern in models if it were me I would probably just look at the various parts (or full size drawings at the new scale) and just see what looked best. If you are working in CAD, you can draw in the size you choose (head height, head diameter or measurement across flats, etc.), see how it looks there and then change up or down until you are happy with it. I usually keep a table of standard fastener dimensions, including the above items close to the computer when drawing.

Bill
Title: Re: New project
Post by: Gary Brooke on February 25, 2014, 09:32:06 PM
thank you Jo Jason and Bill its nice to be back. So in our sizes what looks right is probabley
strong enogh.

Rgds GARY
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