Kerbal Black Box

[Sampa]

Essentially, a flight analysis component which tracks your space planes flight and parameters so you can fix problems faster without guessing.

[Foxster]

There's something like that in the latest Mechjeb dev releases.

[Sampa]

true, but I know there are people who do not like mechjeb because of its autopilot capabilities.

[HoloYolo]

Oh yes, a black box. I want to hear Jebediah dying for the 60th time on my failed rockets.

[hab136]

true, but I know there are people who do not like mechjeb because of its autopilot capabilities.

You can turn off modules in Mechjeb and just leave the ones you want.

Persistent Trails records your flights, but I don't think it records flight data (throttle, drag, etc).

- - - Updated - - -

Oh yeah, check out Graphotron:

What is Graphotron?

Graphotron is a plugin and a part for Kerbal Space Program, that allows you to plot sensor data into a nice graph, and export as an image and CSV text.

What are some of the data Graphotron can track?

• Velocity (surface/orbit)
  
• Altitude (surface/ASL)
  
• Dynamic pressure (q)
  
• Vehicle mass
  
• Angle of attack
  
• Ship resources
  
• Sensor outputs