The default Schweizer is an ideal plane for spectators, it can't make any noise and they've got it installed already.Gryshnak
How about this?
FS2004 Paper airplane 25 foot long gmax paper airplane with the Schweizr 2-32 files. Will do 400+ knots in a steep dive, but starts to become unstable around 275-280. No animations, no panel, very simple visual model, only 50 polys. Fun to fly especially in tower view. By Bill Wogan. 525K
Say if there is 20 of us in the spectators... even then you'll only have 1000 polys! I'm pretty sure that's less that a single Schweizer!