[[0.90] KSP Interstellar port maintance thread]

This is one of the newest changes Fractal made before disappearing. Probably why it hasn't been updated in the wiki. 0.13 changelog states that thermal rocket ISP is now capped at 3000

Well that explains it! Thanks for the help.

[[0.90] KSP Interstellar port maintance thread]

At the same time, we have our thermal engine, which is using up all the power provided by the reactor (the reactor is running at 100%), yet is putting out 4718.8 kN at an Isp of 2997.1 seconds, meaning that its total dissipated power is only about 14 gigawatts.

I'm a new KSPI user, and so I am stupid about these things. I was recently surprised to see that my 3.75m Thermal Engine was also maxing at 2997.1 Isp . I expected it to be either:

• 2582, because the tooltip for the thermal engine suggests it will be 17 * SQRT(Core Temperature), and the Core Temp of my 3.75M fusion reactor is 23078. 17*Sqrt(23078)=2582
  

• 6825, because the LSPI wiki page for the thermal engine says this is the Isp when used with a 3.75M fusion reactor in a D/T cycle
  

How does this really work? Is 2997.1 a buggy result, or the expected result? If expected, can you help me understand why/how this is correct and how I can predict Isp and thrust for the engine?

[Can't Undock Bug, How To Fix]

The fix:

Kalizec's fix as described in http://forum.kerbalspaceprogram.com/threads/35777-Can-t-Undock-Bug-How-To-Fix?p=902003&viewfull=1#post902003 worked very well for me. Thank you!