# Space Engineers Tutorial: How many thrusters? (tips, testing and tutorials for survival)

This tutorial is all about working out how many thrusters you need for your survival builds in Space Engineers.

The numbers that I list here are all derived from actual ships that would fly – and stay flying after a reload. There were many situations where bizarre behaviour was observed when nearing the limit of the lifting thrusters while on a planet. Sometimes the ship would hold an enormous amount more than expected and at other times the same ship would come crashing down. That’s why I thought to use more visual examples with the use of the light armour blocks.

MacGabhann very kindly pointed out to me that there is a website that can do all the mathematical calculations based on values from 01.116, which will work as long as you give yourself a reasonable amount of safety room.

And here are the values I got in my tests (again these are estimates with a built in safety margin, rounding errors etc):

Atmospheric Thrusters:

Large Ship Large: 800blocks or 450,000kg Small: 75blocks or 37,000kg
Small Ship Large: 1400blocks or 37,000kg Small: 330blocks or 7,000kg

Ion Thrusters:

Large Ship Large: 160blocks or 130,000kg Small: 10,000kg
Small Ship Large: 70blocks or 5,000kg Small: 900kg

Hydrogen Thrusters:

Large Ship Large: 1225blocks or 600,000kg Small: 170blocks or 90,000kg
Small Ship Large: 1600+blocks or 40,000kg Small: 400blocks or 8,000kg

And there you have it! If you’ve got any tips of your own about how you would estimate your thruster requirements I’d love to hear about them. If there are enough for another video I’ll make a pair for this one that includes all of the most helpful tips đź™‚

Here’s the link to the workshop page:

As always, don’t forget to enjoy this awesome (if at times buggy) game!

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Space Engineers

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Kevin Macleod:
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