this work for me: for 6000 feet. do this.... have all upgrades besides $10,000 acceleration. launch off starts you at 6% resistance get it to 3% asap, rocket yourself to 225 mph then just cruise on it until you get around 125 mph then rocket again until 225 mph, again, cruise a while. once you get to about 100 mph then drop your resistance to 0% and gain a lil speed drop your altitude to about 20 ft. until you have a lil bit of speed then with your last rockets boost some altitude so you can "flare" (hangliding term) until you get to 6000 ft...
 "Hedgehog Launch 2"){kind=icon}
 "MoneySeize"){kind=icon}
 "Zening"){kind=icon}
 "Fragger"){kind=icon}
 "Dynamic Systems"){kind=icon}
 "Storm the House 3"){kind=icon}
 "colourPod"){kind=icon}
 "Cargo Bridge"){kind=icon}
 "StormWinds 1.5"){kind=icon}
 "Death Dice Overdose"){kind=icon}
 "Drift Runners"){kind=icon}
 "Fantasy Kommander"){kind=icon}
 "Protector III"){kind=icon}
 "GemCraft chapter 0"){kind=icon}
 "Learn to Fly"){kind=icon}