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Frame from 1925 Doble E-20 Steam Car - Jay Leno's Garage Plays via YouTube's privacy-enhanced embed

1925 Doble E-20 Steam Car - Jay Leno's Garage

Jay Leno's Garage
Demos
YouTube
2 HN users recommended this demo2 months2015–2024 score 2
Years with an HN recommendation, 2007–2026

Cited in steam car threads as a well-produced view of how a Doble works and how it solved startup in 1925.

Jay Leno tours and drives a 1925 Doble E-20 steam car, once owned by Howard Hughes, covering how it starts up and runs. It includes a cutaway view of the engine.

“The video has great production and really shows the starting and driving processes” (HN, 2024)

2 recommendations · 4 citations · Demos

6 Hacker News comments

From the HN archive; up to 20 kept per video, favoring different commenters. Recommendations first.

@FrustratedMonky Mar 2024 Recommends
on HN thread Howard Hughes modified a 1925 Doble steam car to reach 133 MPH (2022)
anybody have diagrams of this engine? Picture [link] This video opens the hood, and shows cross sections of engine. And is technical focus. [link] This Jay Leno video is actually good. Has cutaway of the engine to show the moving parts. [this video]
Cutaway of the Doble engine showing moving parts
@snaily May 2024 Recommends
on HN thread Steam's Last Stand
Jay Leno has a Doble car (mentioned in the article as a 1920s attempt at a "user-friendly" steam car revival). The video has great production and really shows the starting and driving processes: [this video]
Great production showing starting and driving a Doble steam car

Citations, criticism and jokes

@dalke Aug 2015 Cites it
on HN thread Saving 25,000 Manuals
Read more
1930s isn't exactly ancient history. By 1930, for example, we had commercial aviation, a long-distance phone network, and experimental television stations. Of course we also had vacuum cleaners, steam engines, automobiles, combines, and all sorts of other things that needed manuals. At [this video] you can hear mention of the manual that came with a 1925 steam car. ("In the handbook it says 'Things for your man to do every day.'") To be concrete, here's a copy of the instruction manual for a 51-P Crosley radio receiver from 1924: [link] . A "Manual of wireless telegraphy (radio) for the use of naval electricians" from 1915: [link] . And "A practical guide for the use of the Edison phonograph" from 1892: [link]
Mentions a handbook that came with a 1925 steam car
@somat May 2024 Cites it
on HN thread Steam's Last Stand
The stanly was a much earlier tech, perhaps the best car of it's generation. But compare that to the doble, perhaps the high point of steam car technology before that personal motive power route was abandoned. [this video] Now admittedly the doble was a high end luxury item, But you can see how it could be possible to have a every mans steam car.
Doble as high point of steam car technology
@somat Jun 2024 Cites it
on HN thread Steam's Last Stand
Here is how they solved it in 1925. I feel with our many modern advancements we could do much better. [this video] That said, as neat as steam cars are, there is a reason internal combustion engines won. Probably because they are smaller, lighter and most importantly cheaper.
Shows how Doble solved steam car startup in 1925

Video list and Hacker News comment labels from HackerTube (prompted by @karpathy), released under ODC-By 1.0, built on the open-index/hacker-news archive. Hacker News data is provided by Y Combinator; comments remain the work of their authors. Video titles, channel names and thumbnails belong to their creators and are shown via YouTube. HackerTube Watch is an unofficial edition. Data export of 2026-10-31.

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