Helicopters!

[invalid8]

Who needs stability, steerability or even fuel to remain airborne? Behold the weeqeewasUntitled Space Cr!

Unfortunately I can\'t show you how it flies... erratically, to say the least. But all I have to do is take off, keep Q held down, and it\'ll remain airborne indefinitely even without fuel. Depending on how careful you are, you can even make it gain height! This began as a lark, but I wonder how far it could be taken... is it possible to build one that remains stable? Is it possible to build one that gains height consistently? Is it possible to build one that is even somewhat steerable, even though it must spin constantly? I\'d be interested in seeing others\' designs!

[Richy teh space man]

You not the first person to notice this:

http://kerbalspaceprogram.com/forum/index.php?topic=12882.0

The craft file in there is suprisingly easy enough to steer

[ultrasquid]

This is all thanks to the simplified/incomplete aerodynamics model KSP currently uses. If that ever gets refined for greater realism, we could lose the ability to fly these uniquely kerbal aircraft.

[keptin]

Try this one on for size

http://kerbalspaceprogram.com/forum/index.php?topic=11716.msg215062#msg215062

[ultrasquid]

Well, yes, that\'s something completely different, and very kerbal too

[invalid8]

You not the first person to notice this:

http://kerbalspaceprogram.com/forum/index.php?topic=12882.0

The craft file in there is suprisingly easy enough to steer

Ahaha, I didn\'t expect to be first but that one blows mine out the water. Ah, physics!

And keptin, that wasn\'t quite what I was looking for, but it was... certainly something =P