Author Topic: Uniflow Engine  (Read 1037 times)

Offline gary.a.ayres

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Uniflow Engine
« on: July 14, 2021, 11:28:01 PM »
A simple uniflow engine based on a design by Stan Bray.

The mechanical design follows SB's original plans scaled up to x3.5, but much of the layout and appearance of my version are my own.











<a href="https://www.youtube.com/watch?v=071Zh0OVfcU" target="_blank">http://www.youtube.com/watch?v=071Zh0OVfcU</a>

Dimensions (excluding wooden plinth) -

Overall length:     450 mm / 17 5/8 inches

Frame width:     145 mm / 5 ¾ inches

Overall width (including crankshaft):     300 mm / 11 ¾ inches

Height:     203 mm / 8 inches

Bore:     35.7 mm / 1 7/16 inches

Stroke:     40 mm / 1 5/8 inches

Flywheel diameter:     157 mm / 6 3/16 inches

Large pulley (round belt) diameter:     112 mm / 4 7/16 inches

Small pulley (flat belt) diameter:     51 mm / 2 inches

Weight:     12.9 kg / 28.4 lbs


Materials -

Frame (including base):     aluminium

Cylinder:     cast iron

Piston:     cast iron

Crosshead:     cast iron

Connecting rod:     bronze

Big end:     cast iron

Crankshaft:     steel

Main bearings:     bronze

Flywheel:     steel

Large pulley:     brass

Small pulley:     aluminium

Bushes and collars: bronze and cast iron

Fixings:     stainless steel

The plinth is made from solid oak with commercially-bought steel and rubber feet.

gary

Offline crueby

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Re: Uniflow Engine
« Reply #1 on: July 15, 2021, 02:29:45 AM »
Very well done Gary!

Online Kim

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Re: Uniflow Engine
« Reply #2 on: July 15, 2021, 05:44:31 AM »
Very cool and unique engine, Gary!
Kim

Offline gary.a.ayres

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Re: Uniflow Engine
« Reply #3 on: October 23, 2021, 11:52:59 PM »
Thank you Chris and Kim!

Offline MJM460

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Re: Uniflow Engine
« Reply #4 on: October 24, 2021, 02:27:18 AM »
Hi Gary Great to see the finished project in the showcase.

Interesting strobe effects on the flywheel as speed varies.

With all those bolts in the flywheel, it would be a great platform for some balancing experiments!

Well done on the artistic adaption of the original design.

MJM460

The more I learn, the more I find that I still have to learn!

Offline gary.a.ayres

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Re: Uniflow Engine
« Reply #5 on: October 24, 2021, 11:08:36 AM »
Hi MJM.

Thanks for your kind words and for all your advice and support with this project and others.

 :ThumbsUp:

gary

Offline Bearcar1

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Re: Uniflow Engine
« Reply #6 on: October 24, 2021, 01:04:48 PM »
SWEET!!! Very nicely done Gary ...  :DrinkPint:


BC1
Jim

Offline gary.a.ayres

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Re: Uniflow Engine
« Reply #7 on: October 24, 2021, 01:51:52 PM »
Many thanks Jim!
 :cheers:

Offline propforward

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Re: Uniflow Engine
« Reply #8 on: October 24, 2021, 11:38:01 PM »
Superb Gary. Lovely showcase of that engine.
Stuart

Forging ahead regardless.

Offline Don1966

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Re: Uniflow Engine
« Reply #9 on: October 26, 2021, 12:19:16 AM »
Super runner nice job Gary……


‘Don

Offline Hugh Currin

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Re: Uniflow Engine
« Reply #10 on: October 26, 2021, 01:16:05 AM »
Gary:

Very nice engine, great job. It has a bit of steam-punk flavor which I really like.

Thanks.
Hugh

Offline gary.a.ayres

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Re: Uniflow Engine
« Reply #11 on: October 26, 2021, 06:37:39 AM »
Stuart, Don and Hugh - thank you very much.

@Hugh - yes, I do like to punk the steam from time to time!  ;)