Hatch with Tension Spring
Practical example: Hatch with Tension Spring. This example, produced ‘on the fly’, illustrates (although only as a quick run-through) a complete dimensioning process for a tailgate with a four-bar system including a tension spring.
It factors in various different technical and ergonomic restrictions like manual forces (considering the cases with and without the tension spring at the same time), kinematic synthesis conditions, friction, street inclination, different animation directions, alternative mounting points, etc.
While this video is offered only with German as spoken language, a version with English subtitles is available.