Hello, here my idea, with 0.25, probabily you'll smash it but me.. it use a single ion engine, 42 batteryes z-400 and one xeon 150 tank. energy/xeon is almost perfect to give 1443 seconds (24h) of flight. also very easy this plane: hit spacebar, wait a couble of seconds that reach ~30m/s and just take off. point your nose at right angle (i'm testing with ~5°), activate sas, time warp and enjoy. apoasis: 25.940m @930m/s http://imgur.com/a/bZQuw