Twin tail design on plane...?

[mjolnir]

To piggyback on what Gscholz said, sometimes they do it because it means they can have two shorter vertical tails instead of one large one and get the same effect.  Definitely a consideration for Navy planes (F-14, F-18) where space is a factor.    The F-15 has twin tails too, because a single tail would have been huge, thus making it a big target to shoot at.  Probably not a big concern for your jump plane, but those are a couple reasons why designers go for the twin tail design.

[bpti]

I would thingk: more tail area .
also, for multi engined planes, the tails will be in the slipstream and thus can be canted to minimize the p factor.

[MrCoffee]

You couldnt get me to jump out of a plane for all the money and women in the world.

[StSanta]

Ah ok.

I was wondering whether it has something to do with centre of gravity issues?

In the Skyvan and similar planes, only ten skydivers are allowed at the ramp at any one time - the reason being that if there are any more, even full forward deflection by the pilot cannot keep the plane level - it'll start a climb and then stall.

And what's the p factor?

Geesh, this is scary - I'm getting an interesting in non combat planes...

Hawklore, lol, Russian iron rules. Was soo sweet to just get on, feel the acceleration, the very short takeoff length, the 8 minute to alt and then a *beautiful* open tailgate. Just stepping out into freefall is a surreal feeling. Had a big sh|t eating grin on my face the whole time. The cessna takes 25 minutes to alt, so I was about to do my "snooze a little" routine when sis pointed to altimeter and a broken English voice said "two minhiits til droph".

And I absolutely LOVE the red light -> yellow light -> green light GOGOGO thing. Makes me feel like some kinda SEAL