Heisler locomotive

[1] Somewhat similar to a Climax locomotive, Heisler's design featured two cylinders canted inwards at a 45-degree angle to form a 'V-twin' arrangement.

Unlike the Shay, Heisler's design did not have a continuous string of line shafting running the length of the engine.

The Heisler was the fastest of the geared steam locomotive designs, and yet was still claimed by its manufacturer to have the same low-speed hauling ability[citation needed].

For this reason, when A & G Price built their Heisler, in 1943, they used a Belpaire firebox, to mitigate problems with burning wood and accommodating the drive shaft.

Similar to the Climax, some Heislers, especially two-truck ones, were converted to diesel or gasoline power, retaining their gearing and drive shafts, but their steam boiler is replaced by an internal combustion engine.