The conception of the front-drive gasoline-electric hybrid ladders Type 13 / 16 has been used in the design of the front-drive gasoline aerial ladders Type 23 / 25 / 26 / 28 / 30. Type 23 (1914) was a front-drive tractor with a 4-cylinder engine producing 72 hp. It was used to install aerial ladders on its chassis.
Type 25 (1914) was 85′ aerial ladder with a 6-cylinder 100 hp engine. Type 26 (1915) was the same chassis, but with a 4-cylinder 72 hp engine. Other sizes of ladders were also available. Type 28 (1915) was a service ladder truck with a smaller wheelbase and 6-cylinder 100 hp engine.
Type 30 (1914) was a water tower with a 6-cylinder engine. Type 33 was a service ladder truck with 4-cylinder 72 hp engine (1916) or 6-cylinder 105 hp engine (1922). Both models had bigger wheelbase than the Type 28.