Space Engineers

Space Engineers

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Simpson3k Jan 24, 2019 @ 2:40am
Large hydrogen thruster > hydrogen tank > hydrogen generator ratio
In the wikia they tell how fast each hydrogen thrusters drain a hydrogen tank but what i wonder is how many of the different hydrogen thrusters the small and the large hydrogen generator can supply assumed enough tank capacity and ice ore is available.

Yesterday i successfully started from a planet with a small ship half/half with hydrogen and jet engines, three large hydrogen engines as forward thrusters and several small one on other directions, one hydrogen tank and two hydrogen generators. Now i am planning to build a big ship for the same purpose (commutig between planet and space and also space exploration) and would make it fully dependant on hydrogen this time, Still the info in the internet about moved mass and required fuel for thrusters is mostly unavailable it seems.

How much mass can one large/ small thruster move.. how many can i add to a ship per hydrogen generator, how many tanks should i add?

Did anybody deeper investigations into this and can give me some numbers perhaps.. a formular of some sort?

Every given information on this subject would be very much appreciated.

Thank you in advance.
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Burstar Jan 24, 2019 @ 4:41am 
F = ma where:

F = The sum force in Newtons of all thrusters in the relevant direction (determinable in game for each thruster in vanilla by shutting it off and sliding it's override to max)

m = mass in kg

a = acceleration due to gravity you're trying to counteract. For Earthlike 1g = 9.81 m/s^2 (round to 10)

A hydrogen tank will completely supply the hydrogen demand of all thrusters until it's empty, but the O2/H2 generator will not keep it full as it can't keep up.
VelxraTV Jan 24, 2019 @ 5:21am 
Basically one hydro tank and two generators per each thruster will be enough to keep demand on the thruster.

Generally it will always be better to have more generators then tanks as well. This is because the generators will always pool energy for use. The hydro tanks provide a larger pool of fuel for on demand use.
Last edited by VelxraTV; Jan 24, 2019 @ 5:23am
Thalyn Jan 24, 2019 @ 7:46am 
If you're generating directly, without tanks, be prepared for a lot of generators in some circumstances.

On the small grid, each generator can produce 820 hydrogen per second, requiring 82kg of ice (10:1 ratio). Small thrusters require approximately 109.2 hydrogen per second at full burn, so you could power up to 7 of them (764.4h/s) off a single generator with a little left over. Large thrusters require approximately 514.1 hydrogen per second at full burn, so you can only reasonably run one of those per generator.

On the large grid, you're looking at 1,670 hydrogen per second being produced, requiring 167kg of ice (10:1 again). This time the small thrusters require appoximately 1,092.5 hydrogen per second, so you'll only get one per generator. Large, however, requires approximately 6,426.7 hydrogen per second, so you'll actually need 4 generators (6,680h/s) per thruster.

NB This used to be quite different but the production rates have been increased substantially.
eg Large grid, large thrusters would take 13 generators previously.


Obviously there's going to be leftover from each of these situations, and not running at full burn will allow more per generator (or fewer generators per unit). For example, 2 generators on the small grid could actually power 15 small thrustsers, not just 14, while they could also power 3 large thrusters instead of only 2.

Tanks can make for an excellent buffer, though, if you're not expecting to be going full-burn all the time. I would highly recommend fitting at least one if you can afford the room since you can more than halve the number of generators you need with that buffer in place.
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Date Posted: Jan 24, 2019 @ 2:40am
Posts: 3