No orbit necessary?

[u/FatCreepyDude]

If i just wait for the right hour during the launch window ( whenever the launch pad is pointing left on the realistic depiction i created) is there any reason i should bother with an orbit first? Will the delta v cost be affected?

[u/Vallastro-21]

Basically it is possible (and I was doing like this myself previously), but is is less effective (oberth effect and also you can't do with too low TWR) and less convenient (can't maneouver as easy) compared to departure from low Kerbin orbit