John,
The 2J was outlawed because it violated the rule outlawing "movable aerodynamic devices". The rule was primarially intended to eliminate the use of rear wings that were mounted to and applied downforce directly to the rear suspension uprights as well as wings which had their angle of attack adjustable by the driver. IFIRK, Chaparrel introduced both these innovations. The wing angle was adjusted by a foot pedal on the left (since they used automatic transmissions there was no clutch pedal there). McLaren (and others) used upright mounted wings as well untill they were banned. Another complaint against the 2J was due to the debris blown about by the ground effects fans. The 2J was actually loaned/given to Chaparrel by GM, having been originally been built as a "tire testing" vehicle. Aah, the perks of GMs back door racing, er excuse me, Engineering Development policy.
The 2J was outlawed because it violated the rule outlawing "movable aerodynamic devices". The rule was primarially intended to eliminate the use of rear wings that were mounted to and applied downforce directly to the rear suspension uprights as well as wings which had their angle of attack adjustable by the driver. IFIRK, Chaparrel introduced both these innovations. The wing angle was adjusted by a foot pedal on the left (since they used automatic transmissions there was no clutch pedal there). McLaren (and others) used upright mounted wings as well untill they were banned. Another complaint against the 2J was due to the debris blown about by the ground effects fans. The 2J was actually loaned/given to Chaparrel by GM, having been originally been built as a "tire testing" vehicle. Aah, the perks of GMs back door racing, er excuse me, Engineering Development policy.