M107R orbital refuelling tanker.

[Vanamonde]

The new, larger ARM ships require much more fuel. Fortunately, they also allow for much larger fuel delivery ships. This here is the M107Rb Tanker.

After discarding the 2 asparagus boosters, the main booster will take you just short of orbit, and then run dry so as to be ejected sub-orbitally and leave no space debris.

As you can see, this ship reaches orbit with the equivalent of 3 nearly full S3-14400 fuel tanks.

Once you have rendezvoused with the target ship, the M107Rb has a standard docking port at bow

and a Senior docking port at stern

so that it can deliver fuel to just about any size of target ship. The M107Rb is also provided with fore and aft lights for operating in Kerbin's shadow.

After the tanker is empty, it can be de-orbited with its RCS.

Craft file: http://www./view/uodmcdcsj0zj4b8/M107Rb_Tanker.craft

Edited April 22, 2014 by Vanamonde

[Camaron]

You could just stick a decoupler in between the booster and the dock, which will cut the crossfeed and let you not have to worry about the extra step.

[Vanamonde]

Thought about it, but I don't like to put any unnecessary parts on my ships.

On second thought, I'm offering this to other players, and not everybody shares my minimalist compulsions. So I took your advice, and the ship now flies with normal staging.

Edited April 22, 2014 by Vanamonde

[iDan122]

You can make a universal docking port by clipping a standard docking port into the senior one.

Anyway nice tanker!