Stuart Triple Expansion Engine

sunworksco

New member
Is it a good steam engine design to machine the cylinders out of 6061 aluminum with 303 stainless steel cylinder liners?
I'm designing a steam motorbike and any weight savings is always best.
I have access to Stuart drawings for building any size engine.
I need around 2-4 HP.
any constructive advice is much appreciated.:confused:
Thanks,
Giovanni
 

OTTO-Sawyer

Subscriber
Sounds like an interesting project.

There are a lot of model builders on this site that should be able to help you out where needed.
 

JasonB

New member
You would do better looking at a larger design to start with if you want that sort of HP, although I have seen the Stuart scaled up it lacks a lot of refinements you would find on a larger engine such as condenser, single point oiling, feed pumps, etc.

This is more the sort of thing but I don't think even that will develope the HP, its about 12" long.

https://vault1.secured-url.com/reeves2000/images/model/triple.jpg

Jason
 

JasonB

New member
Drawings and castings from Reeves, they also have several twin cylinder compound engines

https://vault1.secured-url.com/reeves2000/shop_item.asp?sub_cat_id=189

There is a guy doubling up a stuart triple on HMEM

http://www.homemodelenginemachinist.com/index.php?topic=6274.0

Jason

---------- Post added at 05:58 PM ---------- Previous post was at 04:59 PM ----------

Further to the Horse Power question if you look at Reeves "Commander" engine the spec for that is 50mm and 75mm bore x 60mm stroke and that only just gives the minimum you require at 2.3HP on 150psi at 500rpm. It is also about 24" long, 18" high and 14" wide.

https://vault1.secured-url.com/reeves2000/shop_item.asp?sub_cat_id=165

You are going to need a lot of room in that frame by the time you have a suitably sized boiler, water & fuel storage, gearbox and clutch, etc.

JAson
 
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