The Slowest fall / simple aerodynamics

[Aya88]

Homework Statement

The problem is to construct a model out of ordinary materials such as paper, blotting paper, foil, tights and so on, that is supposed to fall along about 3 metre long runner with as longest time as possible. (with the inspirations like maple seed)

The Attempt at a Solution

I was thinking about a paper towel parachute with holes in it that would keep the air circulation not to swing around... Or the propeller model with tube (has to have a hole for attaching it to the runner) and 3 blades like in helicopter...

What is the best way to use air resistance in this case?
I'm sorry for such dumb questions =_=,
thank you

 

[LawrenceC]

"to fall along about 3 metre long runner with as longest time as possible."

Please elaborate...

 

[Aya88]

There is a line attached to a celling and there should be a hole in the model so that it goes along a restricted space (to measure time equally)