Modification of a Volkswagen car engine, known as Type 1, carried out by Valley Engineering LLC.

"Valley VW Engine"

There were two engines: the Valley 1915 cc, a four-cylinder engine offered from 1993 until 2016, when the company discontinued production; the Valley 2276 cc, the same as the previous engine but slightly more powerful at 3600 rpm, and therefore equipped with a triple-belt reduction gear from the same Valley engine.

From Appendix 6: Valley Engineering LLC adapted Volkswagen car engines for ULMs, such as the Stolch 701 shown below.

"Valley VW engine"

-We see the wide-toothed belt reduction gear. It has simple ignition. In the below photo, a small alternator is mounted high on the rear of the engine.

“Another example of an installed Valley engine”

Note: The Stolch 701 aircraft model is actually the Stol Ch-701; we've found it written both ways in magazines on the subject.

From Appendix 10: Known for adapting Volkswagen engines for ULM and VLA aircraft, it has also adapted industrial Generac engines for the same purpose. These V2 engines produced 40 HP.

“A Generac Valley engine”