This is very annoying during a firefight. Adding a bextra function to the weapons that need to reload would be a welcome addition. The U4E Arena mutator replaces all the UT weapons with their U4E counterparts, as defined in the mod menu. Read the readme for an explanation of how this works. The new Airblast model looks like a helicopter, which is pretty neat looking.
Primary fire pushes things away, or, failing that, chops people up with the blades.
Alternate fire pulls you in the direction you're pointing, theoretically letting you fly, although it's very hard to control. Along with the rocket launcher and shotgun, it's the most popular weapon in FPS gaming history. It has showed up in some form or another in almost every game, even if, as in this case, it's part of a user-created mod. And with every thousand added to it, the weapon gets more and more unlike its predecessor. The U4E version also bears little resemblance to the Doom version.