Yep more struts or edit the cfg of existing struts making them stronger. I have had similiar issues with rockets less then half that size. the new fuel tanks are really kinda weak compared to the thrust the new engines put out.
I have had this same problem on countless craft, you add a single item close to the command pod and stuff just starts randomly falling off or blowing up. The only solution I have found is to disconnect and then reconnect parts until the problem area is no longer falling off. If you can pin point the area that is falling off it can make this process much quicker.
+1 would be even better if they were 'smart' engines that switched based on the presence of atmo, then it would just be a matter of figuring out how much oxidizer you no longer needed.
A basic list of achievements/ goals for people to try and complete, feel free to post what you\'ve done. Difficulties: (NC) Not completed (E)asy - Use MechJeb (N)ormal - Use SAS (H)ard - 100% Manual (U)ltra Hard - No instrumentation (F2) Shuttle [list type=decimal] [li]Lift off[/li] [li]Leave atmo[/li] [li]Achieve Kerbal orbit[/li] [li]Return to Kerbal[/li] [li]Return to Kerbal (without crashing)[/li] [li]Reach the Mun[/li] [li]Orbit the Mun[/li] [li]Land on the Mun[/li] [li]Land a rover on the Mun[/li] [li]Return from the Mun[/li] [li]Reach Minimus[/li] [li]Orbit the Minimus[/li] [li]Land on Minimus[/li] [li]Land a rover on Minimus[/li] [li]Return from Minimus[/li] [li]Reach the Sun[/li] [li]Orbit the Sun[/li] [li]Return from the Sun[/li] SpacePlane [list type=decimal] [li]Take off[/li] [li]Cross the ocean[/li] [li]Reach 2nd KSC[/li] [li]Land[/li] [li]Land on a runway[/li] [li]Orbit Kerbin (in atmo)[/li] [li]Leave atmo[/li] Easter Eggs [list type=decimal] [li][/li] [li][/li] Let me know if I missed anything and I\'ll add it. And finally my own achievements... Shuttle Lift off - U Leave atmo - N Achieve Kerbal orbit - N Return to Kerbal - N Return to Kerbal (without crashing) - N Reach the Mun - N Orbit the Mun - N Land on the Mun - E Land a rover on the Mun - E Return from the Mun - N Reach Minimus - N Orbit the Minimus - N Land on the Minimus - E Land a rover on the Minimus - NC Return from the Minimus - NC Reach the Sun - N Orbit the Sun - E Return from the Sun - NC SpacePlane Take off - N Cross the ocean - N Reach 2nd KSC - NC Land - N Land on a runway - NC Orbit Kerbin (in atmo) - NC Leave atmo - NC My idea of a 'rover'
Record title: Spacespeed Record Statistic: 21479.7 m/s Game version when record achieved: 0.15.2 Screenshots: Mods used: MechJeb Results of a mission to orbit the sun.
Thanks for giving me this great idea, I created something similar and after 4 failed attempts managed to land it on the mun. I now can cruise around the mun as my heart desires