"Mike Rapoport" wrote in message news
It adds more weight than you might think. The area around the door has to
be reinforced. Make a paper box and feel how stiff it becomes when you tape
the final side and then cut a jarge hole on one side and note how much
stiffness it loses.

Yes. It's pretty amazing what a hole does to the strength. I have a baggage
door mod on my Navion (it was a factory option). There are extra structural
members and a zillion rivets to support a foot square hole in the side.

-Ron