Scheduled Events

Intermountain-silent-flyers-2017-activities-schedule (PDF)

Intermountain-silent-flyers-2017-activities-schedule (DOC)


Intermountain Silent Flyers have several types of events throughout the year.  These events or tasks consist of precision thermal duration, ALES (Altitude Limited Electric Soaring), discus or handlaunch soaring, F3F slope racing, Man-On-Man slope racing, Aerotow, and Cross country soaring.

Precision thermal duration requires the pilot to fly a precise timed tasks that often requires a corresponding precision landing.  The sailplanes are launch from and electric winch or a hi-start (elastic bungee).

ALES requires a sailplane that has been fitted with an electric motor for thrust and an electronic altitude controller to limit the height of the launch by stopping the electric motor at a pre-determined altitude. The sailplane is flown in a precision thermal format with a landing bonus.

Discus launch or DLG consists of flying a hand-thrown thermal duration sailplane. The glider is specifically designed to be thrown like a discus and can typically be launched from 150′ to 300′.  Upon launch the sailplane is flown in various formats that tests the pilot’s skill for thermalling, quick turnaround, precision thermal duration, and precision landing.

F3F slope racing is flown on a slope, like the Point of the Mountain and consists of a timed event flying fixed laps over 100 meter course.

Man-On-Man slope racing consists of four similar aircraft flying against each other on a designated coarse with points for placement upon finish.

Aerotowing is generally a “fun-fly” format and is similar to full-scale aerotowing. A powered R/C tug or tow plane tows a sailplane, piloted by a second pilot to altitude and it is released an allowed to seek out thermal lift.

Cross-country soaring consists of flying an R/C sailplane from a moving vehicle along a pre-determined course. The  sailplane is launched with an electric winch, via aerotow, or even discus launched.  The event may be scored or flown in a “fun-fly” format.  Scoring is based upon the longest distance flown, if the course has not been completed, otherwise; the shortest course time garners the highest score.

We also have several open fun fly events during the flying season.

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