Several attempts were made by Ford/GM/Chrysler to power a car directly with a V4 Beta Stirling, but acceleration was slow. Having a hybrid with electric drive solves the acceleration issue. In this prototype, it was found that at 30-MPH, the car could run continuously without depleting the battery. The Stirling Generator from Philips was being tested due to its very clean exhaust.
https://www.electricbike.com/stir-lec-a ... from-1968/
![Image](https://i0.wp.com/www.electricbike.com/wp-content/uploads/2024/03/SL2.png?w=800&ssl=1)