Problems with Kerbal Engineer and SSTOs

[brezzell]

Has anyone noticed that Kerbal Engineer doesn't work on ships with both Jets and Rockets? Does anyone have a work around or better mod. Id like to know if I can get back home, before I leave for Duna.

Edited September 30, 2015 by brezzell

[Champ]

I don't know how KER could calculate your dV in space : it depends on the amount of fuel you used to get to orbit, and this greatly depends on how you fly you spaceplane. What i do (i am still learning with ssto spaceplanes) is trial and error : fly my ship to orbit, look at the remaining dV, fly back to kerbin (validates this design can get back and land), then do some adjustment (always with a new name !!!), then restart sequence.

[Mastikator]

I've noticed the same, it also has trouble calculating delta-v for rockets directly connected to a tank with only oxidiser (and liquid fuel in another)

[mattssheep4]

If you change the order of the staging in the SPH or VAB so that the rocket engines are first, KER will give the rocket dV you would have if you were still full of liquid fuel. You'll actually have more dV than that, because some or maybe most of the liquid fuel will be burned off while in atmo. You can also empty the liquid fuel tanks that will be used up in atmo to simulate what the mass of the craft will be in space. Just don't forget to put the staging back the right way before launch!

[brezzell]

Thank you. Ill give it a shot.

- - - Updated - - -

I don't know how KER could calculate your dV in space...

That's pretty much all i use KER for. It keeps track of my delta v. On rockets anyway.

[davidpsummers]

I end up calculating it myself.

I made up a simple spread sheet. Since Oxidizer and Fuel are often mis matched on space planes, it calculations which on is in exesss and counts it as cargo....

https://www.dropbox.com/s/8m8ltvl54pbr0ms/Space%20Plane.xlsx?dl=0

[Kobymaru]

Has anyone noticed that Kerbal Engineer doesn't work on ships with both Jets and Rockets? Does anyone have a work around or better mod. Id like to know if I can get back home, before I leave for Duna.

If you're talking about SSTO's with RAPIERS, this is a known Issue and should be fixed hopefully soon:http://forum.kerbalspaceprogram.com/threads/18230-1-0-4-Kerbal-Engineer-Redux-v1-0-18-0?p=2217715&viewfull=1#post2217715

If not, please provide detailed instructions on how to reproduce your problem to the Kerbal Engineer Redux thread.

[Vanamonde]

Modding question moved to the modding subforum.

[brezzell]

I end up calculating it myself.

I made up a simple spread sheet. Since Oxidizer and Fuel are often mis matched on space planes, it calculations which on is in exesss and counts it as cargo....

https://www.dropbox.com/s/8m8ltvl54pbr0ms/Space%20Plane.xlsx?dl=0

SWEET!!! Thank you!