Public Progress Thread (Off-topic SFS)

[ASC]

which means to use up 10t of fuel, it will need to burn for 73 seconds

 

[ASC]

however the engine will not turn off after the main fuel was used up, it will continue going but at reduced power, which means reduced fuel consumption to 1 tons used up every 22.9 seconds, but after 7.3 seconds it will run out of its actual fuel and will turn off

 

[ASC]

so what do you think about my idea, altair

 

[Isaac srbo]

I have a good roket
that is ment for payloads

 

[ASC]

i bet you reach mercury

 

[Altaïr]

Those are very low stats for an engine. 3 tons of thrust is very weak, it's the same as for 2 ion engines. The fuel consumption is huge too. With one ton of fuel consumed per 7.3 seconds it makes an Isp of 21.9 seconds, that's very low.

 

[ASC]

doh,
i realized that is an bit.. too weak.

maybe i should go for higher thrust engine

 

[Altaïr]

doh,
i realized that is an bit.. too weak.

maybe i should go for higher thrust engine

Please Nikita, avoid posting several times in a row. We already told you. You have team Titan now, you can edit your posts a few minutes after you posted them.

 

[ASC]

Please Nikita, avoid posting several times in a row. We already told you. You have team Titan now, you can edit your posts a few minutes after you posted them.

i know

 

[ASC]

maybe that "carbon" engine should be used when you are just an few tens meters of delta-v to reach the destination

 

[XenonSpace]

maybe that "carbon" engine should be used when you are just an few tens meters of delta-v to reach the destination

A single RCS could do that much more efficiently...

 

[ASC]

A single RCS could do that much more efficiently...

i know.

 

[ASC]

maybe i should give the engine more isp if its lower thrust

 

[Altaïr]

i know

Then why do you redo it instantly?!

maybe that "carbon" engine should be used when you are just an few tens meters of delta-v to reach the destination

This post has been posted 4 minutes after your previous one. Please condense your posts, we can't spend our time merging your posts every day!

 

[ASC]

Then why do you redo it instantly?!


This post has been posted 4 minutes after your previous one. Please condense your posts, we can't spend our time merging your posts every day!

oh sorry. lol...
anyways, BO off T.

 

[ASC]

Those are very low stats for an engine. 3 tons of thrust is very weak, it's the same as for 2 ion engines. The fuel consumption is huge too. With one ton of fuel consumed per 7.3 seconds it makes an Isp of 21.9 seconds, that's very low.

wait. remember that i said it burns 1 ton of fuel every 7.3 seconds?
well in one second of this engine running, it will burn 137 kilograms of fuel

 

[Altaïr]

wait. remember that i said it burns 1 ton of fuel every 7.3 seconds?
well in one second of this engine running, it will burn 137 kilograms of fuel

Yes, but what I said still stands.

For comparison, the Valiant engine burns 143 kg of fuel per second, which is close to your engine, but it provides 40 tons of thrust. Yours only gives 3 tons, it's far below.

If you want to take into account efficiency (which is Isp: specific impulse), you should use that formula:
Thrust (in tons) = fuel consumption (in tons/s) × Isp

Or the reversed variant:
fuel consumption = thrust / Isp

That's how I know the fuel consumption from the Valiant engine:
0.143 tons/s = 40 tons / 280 s

This will help you to set the fuel consumption accordingly to the thrust value. Ingame, a low Isp value is 240 s (Titan/Hawk engines) while a high value is 280-290 (Valiant/Frontier). Apart from this, the RCS have a very low value (I don't remember how much) and the ion engine a very high value (1200 seconds), but those are special cases.

 

[ASC]

rcs have 120 s impluse but was actually significantly higher. because it was only using around 60-100 kg. while also propelling the spacecraft alot more faster, if its on space.

maybe i should put my another engine there if i have enough time.

 

[ASC]

thrust: 1300t
consuming fuel per 1 sec: 8 tons 125 kilograms
size: 8 wide

Maybe this one will not be inefficient as my last engine

 

[Marmilo]

View attachment 94775
thrust: 1300t
consuming fuel per 1 sec: 8 tons 125 kilograms
size: 8 wide

Maybe this one will not be inefficient as my last engine

That's 160 isp i think

 

[ASC]

That's 160 isp i think

Much better.

 

[Marmilo]

Much better.

It's awful isp

 

[ASC]

It's awful isp

or not?
atleast it generates alot of thrust.

 

[Marmilo]

or not?
atleast it generates alot of thrust.

It's 2/3 the efficiency of a hawk i think

 

[ASC]

i let altair think about it once he comes back.

It's 2/3 the efficiency of a hawk i think