This description might be out of date. For the latest news head over to the
Forum Thread: http://forum.kerbalspaceprogram.com/threads/74395-Lopac-Lifter-Family

A lifter family consisting of as few as possible parts.

Download on Dropbox: https://www.dropbox.com/sh/i1lsls10rjnx9zk/_0aPvkoS-b

Goodies:

75 km target orbit
Payloads capacities of 10, 20, 40, 80, 120, 180, 240, 320 400 and 520 ton
Very forgiving on non-optimal ascent profiles because of large fuel supply
Enough fuel to deorbit final propellant stage for a debris free orbit
MechJeb compatible (75 km, 10km, 75km, 0°, 40%)

The reason for designing this new lifter family is that my Tangent Lifter Family does not scale well beyond 180 ton payloads because it uses a lot of parts. So I intended to create lifters of much higher payload capacities but this is not possible within the Tangent series.
And with the arrival of 0.23.5 it is the ideal time to build new lifters.

Name	Payload 75km	Parts	Stages
Lopac 01	10	10	2
Lopac 02	20	15	2
Lopac 04	40	22	2
Lopac 08	80	37	2
Lopac 12	120	57	3
Lopac 18	180	60	3
Lopac 24	240	77	4
Lopac 32	320	96	5
Lopac 40	400	127	6
Lopac 52	520	163	7

Changelog

V0.1: Initial Version
V0.2: Added Lopac 12, 18 and 24
V0.3: Update to 0.23.5, got rid of Launchprad problems, reduced partcount
V0.4: Added Lopac 32 and 40
V0.5: Added Lopac 52
V0.6: Removed non-stock parts (thanks to galimare)
V0.7: Reduced partcount in Lopac 52
V0.8: Staging Bugfix in Lopac 52
V0.9: Added subassemblies, minor tweaks
V0.10: Overhaul for KSP 0.24.2, improved design
V0.11: Compatibility fix for KSP 0.90.0

Lopac Lifter Family