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: RedRyder on January 05, 2025, 12:16:42 pm

Title: Re: Rare Occurrence Steaming 2 Early 1930s Jensen Steam Engines with 6” Diameter Boilers – Super Rare #50 & D-Valve #20
Post by: Jim on January 06, 2025, 12:05:26 am

Boy oh boy those boilers look big!

Title: Re: Rare Occurrence Steaming 2 Early 1930s Jensen Steam Engines with 6” Diameter Boilers – Super Rare #50 & D-Valve #20
Post by: Nick on January 05, 2025, 11:39:20 pm

You seem to be having a lot of fun running engines lately ;) are you getting them ready for Cabin Fever?

Title: Re: Rare Occurrence Steaming 2 Early 1930s Jensen Steam Engines with 6” Diameter Boilers – Super Rare #50 & D-Valve #20
Post by: bamsefar1 on January 05, 2025, 08:16:32 pm

Not saying much, but I have never seen something like these pictured or live-operation.Very interesting 🙂

Title: Re: Rare Occurrence Steaming 2 Early 1930s Jensen Steam Engines with 6” Diameter Boilers – Super Rare #50 & D-Valve #20
Post by: St Paul Steam on January 05, 2025, 08:13:48 pm

I've had the pleasure of having the 2 plinth model right here in the SPS shop and running. What a treat to have something that a young Tom Jensen Sr. Started his business with. These are 2 exceedingly rare plants that most people will never see in person, thanks for bringing them to us Gil.

Title: Re: Rare Occurrence Steaming 2 Early 1930s Jensen Steam Engines with 6” Diameter Boilers – Super Rare #50 & D-Valve #20
Post by: RedRyder on January 05, 2025, 05:04:58 pm

Thanks, Daniel.! 

We have a guest room if you need a place to stay.

Title: Re: Rare Occurrence Steaming 2 Early 1930s Jensen Steam Engines with 6” Diameter Boilers – Super Rare #50 & D-Valve #20
Post by: Stoker on January 05, 2025, 01:08:17 pm

Gil my friend ...... once again I see that you are having just too much fun!

Some day, some way, I'll have to find a way to stop by the office for a day, just to have a play along with you!!!

Title: Re: Rare Occurrence Steaming 2 Early 1930s Jensen Steam Engines with 6” Diameter Boilers – Super Rare #50 & D-Valve #20
Post by: RedRyder on January 05, 2025, 12:46:01 pm

Thanks, Richard !

Title: Re: Rare Occurrence Steaming 2 Early 1930s Jensen Steam Engines with 6” Diameter Boilers – Super Rare #50 & D-Valve #20
Post by: RichSteamTx on January 05, 2025, 12:37:48 pm

very nice engines!  love the looks of them, very beefy!

Title: Rare Occurrence Steaming 2 Early 1930s Jensen Steam Engines with 6” Diameter Boilers – Super Rare #50 & D-Valve #20
Post by: RedRyder on January 05, 2025, 12:16:42 pm

This is a pretty rare sight.

Two of the 4 known Jensen Steam Engines with 6" diameter boilers are here side by side for a Steam-Up.
Beyond these 2 there are only 2 more known Jensens (both are #50s) with 6" boilers.

I ran them both from the same variac.
During warm up I brought the total shared wattage to about 1500.

After they were good, hot, and running for a bit, I turned down the juice to just over 90 volts which gave them about 850 watts to share.

The early D-Valve engine is fast and loud compared to the #50.
Once it was shut down you will hear a lot less noise as this #50 is surprisingly quiet.

Special credit to my granddaughter C.C. who helped me clean the dust off both and polish a little with Simichrome and microfiber towels.

Enjoy,

Gil


https://www.youtube.com/watch?v=hLRqZHP61b8



Pictures....


[attachimg=1]



[attachimg=2]



[attachimg=3]



[attachimg=4]



[attachimg=5]



[attachimg=6]