incorrect/misleading dV in 16.5

[joneskun]

pix http://imgur.com/fS0zeji
craftz http://pastebin.com/VhujDySU

[Gerry1135]

This is almost certainly because the root part of the vessel is not in stage 0. The simulation code simulates the root part of the vessel and all the parts attached and because nothing "important" is decoupled from the root part when you stage (i.e. no engines or fuel tanks are decoupled) the simulation stages the pod and other bits immediately assuming you want to maximise the deltaV available.

There are changes being planned that will address this shortcoming but they are complex and require more free time than I have available to implement at present. In the meantime, you will need to make sure that the root part of your vessel doesn't get decoupled from the remainder of the craft, in this case, change the root part to be the command pod, and the calculations will be correct.

[zeroinformatique]

Isn't it easier to simply display a warning if the root part gets staged during the simulation, and stop the simulation at this level?
Giving wrong numbers is a lot worse than giving no numbers at all.

[arekbulski]

Thats is a fair point, but I suspect that checking for this condition is as complex as solving it.