I fly gliders and R/C gliders. I have used this hologram tape on
several models and I can tell you that a 10" wing chord almost
disappears at 2000 feet altitude. With the tape, I can see the model to
locate it much easier, but no better to control it. In flying the real
sailplanes, location is what we need. It's paramount that others see
us, as we are in close proximity with each other in haze and froghair
at cloudbase. It's even more important at the closing speeds we can
achieve if flying head-on at high speeds. I would not install this on
my leading edges as I do on my models, but a 2" strip centered from the
nose to the canopy would probably be visible for at least 1/2 mile.
I'll be checking this out a bit better when I receive mine. I'll report
back when I know if it's effective. One caveat, I fly in West Texas
where we can see a pretty good distance, anyway.

Jack Womack