Office of Steam Forum for Model & Toy Steam Gas & Hot Air Engines

The Regular Stuff: Chat, Buy, Sell, Off Topic, etc. => General Discussion - Model & Toy Steam Engines – Stirling Cycle – Flame Lickers – Small Antique Originals => Topic started by: Jim on March 29, 2026, 03:51:00 pm

Title: Re: OKMO R02 Rider Ericsson Stirling Engine
Post by: parallelmotion on March 31, 2026, 09:04:59 pm

Thanks Jim. Not my hunk of iron but I have my share.

Title: Re: OKMO R02 Rider Ericsson Stirling Engine
Post by: Jim on March 31, 2026, 06:57:33 pm

G'day Brent,

That looks a wonderful hunk of iron there.

And agree re: Denny's Improved

Title: Re: OKMO R02 Rider Ericsson Stirling Engine
Post by: RedRyder on March 31, 2026, 09:53:01 am

My Denny Improved Ericsson from Jin once ran for 1 hour and 58 minutes on a single tank of fuel.

Title: Re: OKMO R02 Rider Ericsson Stirling Engine
Post by: Stoker on March 31, 2026, 08:29:11 am

Wow ... that's great Brent!

Thanks for that added bit of historical information. I just love to get these glimpses into the past!!!

Title: Re: OKMO R02 Rider Ericsson Stirling Engine
Post by: parallelmotion on March 31, 2026, 07:22:54 am

Very nice video; thanks for posting. Not sure why Jin doesn't correct this, but his R02 is not a model of a Rider-Ericsson engine. It is a variant of an Ericsson engine called the "Denny's Improved" Ericsson made by the American Machine Co. of Delaware and not by Rider-Ericsson of New York state. If you compare R1 and R2 there are many significant differences although the basic design is the same and Jin used many of the same parts. But Rider-Ericsson it is not. American Machine had no relationship with R-E except to copy its design with several enhancements patented by Harmer Denny of New York and manufactured around 1906-14. Here's the real thing. [attachimg=1]

Title: Re: OKMO R02 Rider Ericsson Stirling Engine
Post by: Jim on March 30, 2026, 05:42:59 pm

The R01 has the elegant Rider lines Daniel.

The R02 is a very solid unit.

Pretty amazing the engines that Jin @JinMachine is producing for us to collect.

Title: Re: OKMO R02 Rider Ericsson Stirling Engine
Post by: Stoker on March 29, 2026, 04:24:29 pm

As is typical for your video productions .... this one is truly excellent!

I love both the R01 and R02 and there is really very little to choose between them. The R01 is a bit more elegant to my eye, while the R02 is a little more compact and robust. They both run like champions and it is most impressive to get such good running out of engines that are really rather small.

Thanks for your efforts to share this wonderful engine with us all!!!

Title: OKMO R02 Rider Ericsson Stirling Engine
Post by: Jim on March 29, 2026, 03:51:00 pm

I have had the RO1 engine for a while and was excited to finally have my hands on the R02 engine.

https://www.youtube.com/watch?v=k8V99A0P4aI