In response to inquiries, here is some clarification regarding the chassis rules for the Sportsman Class:
Chassis: Inline motor configuration only. Obviously, the chassis must have the motor in an inline configuration.
Chassis must be a rattle chassis (Hanna/Econo car type chassis). Rattle Chassis meaning no hinges. Once referred to as a "Slider Chassis".
No hinges, or hinged (floppy) side pans. Obviously, no hinged side pans allowed in any form.
The chassis cannot have more than two main components (center section & side pans assembly) with independent movement. Only the center section (one component) of the chassis and the side pans (the other component of the chassis) can move independently of each other.
Chassis must have a center section consisting of the inline motor mount and the guide flag tongue. The guide flag tongue and the motor mount, must be attached to the center section of the chassis as one single component.
Two side pans can be attached to the center section using tubing and wire, but the two side pans cannot be hinged to the center section. The side pans can be connected to the center section but, not by or with the use of a hinge.
Side to side, as well as up and down movement of the side pans is permitted. The side pans can move up and down or side to side, independently of the center section.