Model Engine Maker

The Showcase => Engines => Topic started by: gary.a.ayres on July 14, 2021, 11:28:01 PM

Title: Uniflow Engine
Post by: gary.a.ayres 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.

(https://www.model-engineer.co.uk/sites/7/images/member_albums/173350/859112.jpg)

(https://www.model-engineer.co.uk/sites/7/images/member_albums/173350/896540.jpg)

(https://www.model-engineer.co.uk/sites/7/images/member_albums/173350/896541.jpg)

(https://www.model-engineer.co.uk/sites/7/images/member_albums/173350/896542.jpg)

(https://www.model-engineer.co.uk/sites/7/images/member_albums/173350/896543.jpg)

https://www.youtube.com/watch?v=071Zh0OVfcU

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

Title: Re: Uniflow Engine
Post by: crueby on July 15, 2021, 02:29:45 AM

Very well done Gary!

Title: Re: Uniflow Engine
Post by: Kim on July 15, 2021, 05:44:31 AM

Very cool and unique engine, Gary!
Kim

Title: Re: Uniflow Engine
Post by: gary.a.ayres on October 23, 2021, 11:52:59 PM

Thank you Chris and Kim!

Title: Re: Uniflow Engine
Post by: MJM460 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

Title: Re: Uniflow Engine
Post by: gary.a.ayres 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

Title: Re: Uniflow Engine
Post by: Bearcar1 on October 24, 2021, 01:04:48 PM

SWEET!!! Very nicely done Gary ...  :DrinkPint:


BC1
Jim

Title: Re: Uniflow Engine
Post by: gary.a.ayres on October 24, 2021, 01:51:52 PM

Many thanks Jim!
 :cheers:

Title: Re: Uniflow Engine
Post by: propforward on October 24, 2021, 11:38:01 PM

Superb Gary. Lovely showcase of that engine.

Title: Re: Uniflow Engine
Post by: Don1966 on October 26, 2021, 12:19:16 AM

Super runner nice job Gary……


‘Don

Title: Re: Uniflow Engine
Post by: Hugh Currin 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.

Title: Re: Uniflow Engine
Post by: gary.a.ayres 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!  ;)