On Wednesday, July 16, 2014 3:38:56 AM UTC-7, Matt G. wrote:

If looking up a glider by N-number, you can simply look at the
registration to determine what category airworthiness cert it has. Under
the "Airworthiness" section, look for "classification". It will be
either "Standard" or "Experimental". This is the easiest way to tell for
a particular glider, since some models have ended up in both the
standard and experimental categories over the years...

Be cautious about what you learn by doing that; the FAA's records sometimes contain errors about certificate type. For example, I think that there is at least one Russia sailplane for which the certificate type is shown as "Standard" despite the absence of an actual type certificate.

Thanks, Bob K.