How do you use the grappler or is it for show?

[Mitchz95]

And then you leave it there? This looks doable only with KSP Interstellar, since you can refine fuel. Without it you only would spend more funds imho...

An electric powered car. You expend no fuel, and recover it once the Kerbals have departed. Full refund.

[Wanderfound]

So you actually take off and land on the ground instead of on the runway? How do you get kerbals back inside when you need to use that vessel?

Ladders.

You can do airport buses if you want, but the simplest way is to just spawn a few Hitchhiker pods onto the runway, exit the Kerbals and recover the pods.

And, as mentioned by others: land on the runway, taxi to your parking spot.

[Agost]

You make a tanker truck with a claw attachment. Drive to plane, claw, refuel. Drive back to runway and recover for 100% minus fuel transferred to plane. You can also use the truck to spawn the kerbals for the plane, just add a probe core to drive back.

Didn't know that the refund was 100% on the runway, I thought it was less. Is this the same for TAC-LS and/or similar resources? ( the ones for station science for example )

An electric powered car. You expend no fuel, and recover it once the Kerbals have departed. Full refund.

Wasn't thinking about that... yeah, I'm quite new to KSP

Ladders.

You can do airport buses if you want, but the simplest way is to just spawn a few Hitchhiker pods onto the runway, exit the Kerbals and recover the pods.

And, as mentioned by others: land on the runway, taxi to your parking spot.

I didn't mean ladders... I asked it because I forgot that the runway is actually connected with the KSC without any step, unlike the one between the runway and the ground