Introductory, Beginner Topics and Fun

Introduction to Soaring (a slideshow by Bill Kuhl)

Getting Started in R/C Soaring (courtesy of FatLion)

See How It Flies (Principles of Flight)

Beginner's Guide to Aerodynamics (NASA)

Soaring Frequently Asked Questions

Flight Club - an online Glider Simulator (courtesy of Dan Burton)
Paper Airplane Simulator (off topic, but just for fun)

 

Advanced Topics and Theory

CRRC Model Design Articles

Aerodynamics Index (Selkirk College)

Sailplane Performance Analysis

Center of Gravity Locator

V-Tail Design

 

Useful Articles and Technical Information

Trimming Your Sailplane for Optimum Performance - by Brian Agnew (courtesy of B2Streamlines)
Center of Gravity Location - by Dr. Mark Drela MIT (courtesy of Pole Cat Aeroplane Works)
Using the Rudder in Thermal Flying - by Dr. Mark Drela MIT (courtesy of Pole Cat Aeroplane Works)
Martin Hepperle's Model Aviation - Several articles on aircraft aerodynamics, and interactive page devoted to propeller design, and another which evaluates airfoils.  Martin also takes a close look at winglets. 

 

Flight Instruction by CSS Members

The following CSS members have volunteered to mentor new pilots and offer their years of R/C soaring experience. 
Barry Andersen
Sam Bach
Steve Siebenaler