1925 Doble E-18 Sedan

About this vehicle

<p><strong>Surviving “E” cars list includes No. 18 as Jay Leno’s</strong><br>The Wikipedia entry for Doble steam cars lists surviving Model E cars, and specifically notes <strong>“18 (Jay Leno’s Garage)”</strong>among them. <a target="_blank" rel="noopener noreferrer" href="https://en.wikipedia.org/wiki/Doble_steam_car?utm_source=chatgpt.com">Wikipedia+2HistoryNet+2</a></p><p><strong>Model &amp; general attributes</strong><br>Because the E-18 is a “Model E” Doble, much of what is known about “Model E” steam car design applies. For example:</p><p>The “Model E” line used a once-through / monotube boiler design refined to allow fast steam generation, and typically operated at high pressure (~750 psi nominal in many references) with superheating and use of condensers. <a target="_blank" rel="noopener noreferrer" href="https://en.wikipedia.org/wiki/Doble_steam_car?utm_source=chatgpt.com">Wikipedia+2HistoryNet+2</a></p><p>Model E cars were made from about 1922 to 1925, with only ~24 built (numbers 1 through 24) in varying body styles (roadsters, sedans, limousines). <a target="_blank" rel="noopener noreferrer" href="https://en.wikipedia.org/wiki/Doble_steam_car?utm_source=chatgpt.com">Wikipedia+2HistoryNet+2</a></p><p>The cars had a four-cylinder compound steam engine (two high-pressure and two low-pressure cylinders) arranged in “back-to-back” fashion (sometimes called a Woolf-compound style) with piston valves and Stephenson valve gear (later cars) in place of earlier gearings. <a target="_blank" rel="noopener noreferrer" href="https://en.wikipedia.org/wiki/Doble_steam_car?utm_source=chatgpt.com">Wikipedia+2HistoryNet+2</a></p><p>They didn’t require a conventional transmission, clutch, or driveshaft (engine was integrated into the rear axle).</p>