On Wednesday, February 15, 2017 at 6:30:44 PM UTC-5, Dave Nadler wrote:
Anybody know how many gliders are *active* in USA?

As usual, the FAA statistics are garbled (this shows gliders, but lists
all experimentals as a separate category, including experimental gliders):
https://www.faa.gov/data_research/av...SEP2016V2.xlsx

The FAA database is a total mess (as one expects from FAA), and
probably includes many inactive gliders.
Anyway I did a quick sort, and got:

Valid glider registrations 4523
standard registration (not experimental) 2728
experimental or other non-standard 1795

Anybody have any better statistics?

Thanks,
Best Regards, Dave

Where are you going with this Dave? I know of several gliders with active registrations that have not flown in years.