Love the mod! I'm often flying around to my outposts and hopping out to do some quick work. I realized that the chopper NEEDS a land and leave running option because the rotors spin up time is so long. It would make it more immersive too!

but it would still burn fuel

All part of the give-and-take... Burn some fuel while idling, or wait while it spins up

The way I handle the spin up is by hitting shift-F (to tell it to come to my position) while I'm walking towards it. It starts taking off and I get in while it's in midair.

Alternatively, you can also reduce take-off time by editing "rotorRPFacceleration" to be 0.001 instead of 0.002

The variable is currently defined on line 7 of heliAttack.lua (bit of a cryptic location given take-off is completely unrelated to attack).

Agreed, this feature will be very useful when paired with equipment grid since it can be used as a giant personal laser defence in the sky that follows you