Speed Reduction Drive Videos
Valley PSRU on a Big Twin

Installing a Valley Engineering Series Three PSRU on a Big Twin Engine.
Valley PSRU on a VW Engine

Installing the Valley Engineering series three PSRU on a VW engine.
High Performance with Valley PSRU

Gene Smith flies the high performance Backyard Flyer with Valley PSRU.

Backyard Flyer HP at Airventure 2012

The Backyard Flyer HP doing a short field takeoff at Airventure 2012 with a Valley Engineering PSRU.
Waterbug Airboat with PSRU

Larry demonstrates the Valley Waterbug Airboat with Valley PSRU.