#AnalogComputer

Application: A comet moves on a parabolic orbit in the gravitational field of the stationary sun. Its orbital plane coincides with the plane of the Earth's orbit, which is assumed to be circular. The perihelion distance is one third of the Earth's orbital radius RE.
How long does the comet move within the Earth's orbit?

In the end, an integral has to be solved which also can be done with an analog computer. Details are again available at:
https://permondes.de/gitweb/Analog_Engine.git

Scaling leads again to some funny units. Time is measured in 10 kilo-days, distance in Tera-meters.

In this example, also the interim values can be displayed which is quite instructive.

An issue was the fact that for the calculation of a root, the multiplier was used in a feedback configuration. This was extremely sensitive to any signal >0 which put the circuit to an irreversible overload. Only unplugging and re-plugging the inputs to the multiplier allowed a reset.