What do we know about ISP changes in 1.0

[Elthy]

Due to the aero overhaul and reduced drag im sure the ISP of most engines will be rebalanced so rockets dont get to small. Do we have some numbers about that? Was someone able to read engine stats in one of the videos/streams?

[magnemoe]

Due to the aero overhaul and reduced drag im sure the ISP of most engines will be rebalanced so rockets dont get to small. Do we have some numbers about that? Was someone able to read engine stats in one of the videos/streams?

It looks like the atmospheric ISP of all engines who are supposed to be used as upper stage or in space has been nerfed a lot. Add that this result in lower trust now not just more fuel use.

Think the 909 was 89 or something, vacuum ISP is probably not very affected.

I guess solid fuel first stages will be common.

[Hotblack Desiato]

at least the jet and turbojetengines weren't nerfed at all (from what I got from several preview-videos). and rockets behave quite like with NEAR/FAR, so they shouldn't be heavily altered.

can anyone confirm, that the engines now have a constant fuel consumption like real engines? (whereas ISP and max. thrust will be depending on atm. pressure)

[magnemoe]

at least the jet and turbojetengines weren't nerfed at all (from what I got from several preview-videos). and rockets behave quite like with NEAR/FAR, so they shouldn't be heavily altered.

can anyone confirm, that the engines now have a constant fuel consumption like real engines? (whereas ISP and max. thrust will be depending on atm. pressure)

They have constant fuel use and reduced trust, one of the videoes showed how an pod+90 liter tank+ 909 had TWR less than 1.

If you have an powerful plane you can reach 1000 m/s at low speed but this will cause you to blow up.

Wonder how fast you can go at 20 km? and if you also will blow up.

Edited April 27, 2015 by magnemoe

[Elthy]

Im interessted in the new Mainsail stats since i would consider it the benchmark for any booster engine.

[Adester]

1000 m/s at low speed

but i understand

[Xavven]

You just can't trust some of these engines. So unreliable!

[StainX]

I think heard in the stream yesterday, that now you don't need as much deltaV anymore to get to orbit. (correct me if im wrong!)

[ola]

I suspect that engines will work like they have done with the Real Engine/Real Fuels mods. Ie, like they do in real life.

[Norcalplanner]

Saw that the KR-2L had a sea level Isp of 170 and sea level thrust around 1,000. Someone mentioned that it was Isp of 340 and thrust of 2,000 in vacuum, so it's definitely an upper stage engine now.