How do voyager-type satellites travel such long distances without fuel?

How do voyager-type satellites travel such long distances without fuel?

How do Satellites work? | ICT #10

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answers (2)

Answer 1
July, 2021

Let's put the word "no fuel" in quotes, these devices have fuel. And it is necessary for the orientation of the apparatus.

The attitude control system includes 16 single-component attitude control engines (powered by hydrazine decomposition) with a thrust of only 85 grams each; three gyroscopes with an accuracy of one ten-thousandth of a degree (one of which was a spare); sensors of Canopus and the Sun (which was located in the antenna hole):

The next stage, the ambassadors of the spacecraft (spacecraft) entering the earth's orbit, is its acceleration to the required speed and set the desired trajectory. The upper stage is engaged in this (in the case of Voyager, it was "Centaurus"). He increases the speed of the device, up to the second space, which allows you to leave the earth's orbit.

When launching such projects, we understand that we cannot rush like an arrow to one point, and we want to make the most of the research potential of the apparatus. The planets will not wait for us standing still, and we definitely won't have enough fuel for all the turns. There is only one way out in this situation, "Gravity maneuvers" (gifs in this article, the best illustration). The device passing next to a massive body, due to its gravity, can significantly change its direction and add speed, leaving fuel for small maneuvers and adjustments. Luckily, in the 70s, the giant planets were in a very convenient position relative to each other for flight.

This is probably the best article about Voyager 2 on the RuNet https://habr.com/ ru / post / 406117 /

Answer 2
July, 2021

Once accelerated and then flies by inertia (no air resistance). The only thing that needs fuel is a change in trajectory and rotation around the axis.

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