"Gordon" wrote in message
ups.com...
Mistaking an F-4 for a Scooter or a MiG 21 is like mistaking an 18-
wheeler for a Hummer. Sure, a moron could do it.

Actually, an F-4 in planform at about 4-5 miles looks a lot like an A-4 at
3-4 miles. It's easy to VID when your looking at pictures in a book, not so
easy when the aircraft is near the limits of vision (sun position, clear sky
background or not, etc).

We altered the rules for an ACM derby a number of years back. A mistaken
VID and shot cost the shooters points. With a mixed F-5 / A-4 section (you
couldn't ask for more dissimilar aircraft), head-on VID ranges came down
from 3+ miles to less than a mile.

R / John