Chapter 7, Part 5
Steering System Overview
Written by Rick Horwitz
The material contained in this section is protected by U.S. copyright laws. Any unauthorized duplication or publication of the material contained in this section is prohibited by law.
As mentioned throughout my project plans, the Thunderbolt can be built using either an USS or OSS steering configuration. Additionally, each steering system will vary slightly depending on the main cross-members configuration (110º or 90°). Therefore, a decision must be made as to the type of steering desired prior to proceeding.
OSS- Over Seat Steering
This configuration is simpler and slightly lighter than the 'U' bar USS system. However, for finite control and comfort, many prefer the USS. The OSS is geared towards racing and competition.
USS-Over Seat Steering
The USS system is a favorite for 85% of all recumbent trikes sold. As the most popular, it is also heavier and more complicated than the OSS steering system.
Below are illustrated examples of all steering configurations supported for the Thunderbolt project.
Over Seat Steering Using a "T" Bar Tiller
From an assembly perspective, the 110° cross-member system is better suited for OSS. As illustrated, the USS benefits from the lack of obstructions found in the 90° cross-member system.