Transponders
Background, Purchase and Installation
Article: Transponders in Gliders
This is a good overview of transponders, what is required and what is needed to install them.
Trig TT21 - Popular Choice for Gliders
This model is appropriate for sailplanes because it is relatively inexpensive, low power consumption, lightweight and supports "ADS-B out" capability.
Federal Aviation Regulations
§ 91.215 ATC transponder and altitude reporting equipment and use.
§ 91.413 ATC transponder tests and inspections.
Appendix F to Part 43—ATC Transponder Tests and Inspections
FAA Document: Gliders squawk 1202 on transponders
ADS-B and Transponders
Transponder Agreements between ATC and Glider Clubs
Transponder Agreement: SCOH & IAH TRACON
Mid-Atlantic Soaring Soaring Association, Fairfield, PA
Located near the Camp David TFR
Functional Transponder Check
What is ADS-B?
See page 6 of the following document:
How do you know that your transponder is really being seen by ATC and other aircraft?