How to Increase the Flex in RC Crawlers?

A math model is being derived that can describe and predict the vertical articulation (flex) generated by the RC crawler shocks. The model is validated on three RC crawlers and hints are given how to increase the articulation of RC crawlers.

Correction:
The term "wheelbase" was used in the wrong way. The wheelbase refers only to the distance of wheel axes in the longitudinal direction (front-back). Here "wheelbase" must be replaced by "track width".

The three RC crawlers used in this movie are:
1. MST CFX-W J45 Kit
2. Traxxas TRX-4 Defender, with upgrades. For more see:    • Aesthetic Upgrades TRX-4 Defender and Crea...  
3. Jeep, Chassis CNC Aluminum Metal Carbon Frame Body for 1/10 Crawler AXIAL SCX10, 313mm Wheelbase (Banggood), Jeep Wrangler car body shell for 1/10 RC Crawler AXIAL SCX-10, 313 mm wheelbase (Banggood).
For more see:    • RC Renaissance Romance  

Music:
Siddhartha Corsus - A Sudden Gust of Wind; free license from FMA