Originally Posted by
Wizofoz
Don't think there is any regulatory problem, it would be as many as the aircraft is certified to do aeros with. That being said, I don't know of any aircraft able to do aeros with more than two up (possibley a Yak18?). Things like the Fuji have four seats but a flight manual limitation to two up for aeros.
What type are you thinking of?
Cant remember where i read it (probably the flight manual) , but the Yak 18 can only do aeros when two up....