Tragically it's been proven to be possible in the 707, as some RAAF aircrew found a number of years ago during asymmetric practice (RIP gentlemen, you're still missed).
That topic's been well discussed so I don't want to open it up again, but yes, at least some types will spin.
As with any machine, the weight distribution, configuration, power settings, speed and so on must influence a type's propensity to spin.
Last edited by Arm out the window; 17th May 2006 at 09:37.