Schleicher ASK 21 - ASK-21 Canopies; The Canopy Rules; Rear Canopy Closure

Pilot Briefing Schleicher ASK-21 N421G
Updated September 2, 2016
File: ASK-21 Notes Burtt Compton GBSC 2016-09-02.doc Page: 2 of 10
ASK-21 CANOPIES. The front canopy opens forward, rear canopy opens back.
All Glider Canopies are very susceptible to damage to the hinges or frames by wind and
careless or rough handling by pilots and passengers. A canopy slamming down can crack
the clear Plexiglas. Make sure the passenger never touches the canopies!
Both Canopies MUST BE CLOSED at all times, except when getting in and out.
Even walking a few feet away to hook up the ground or aero tow rope will leave the
canopies exposed to damage.
When sitting in the glider on hot days waiting to launch, one hand must be constantly
holding the canopy. Close the canopies in sequence (rear first) and slowly.
The Canopy Rules!
 Canopies must be closed and locked at all times.
 Close the rear canopy first
 Always close and lock the canopies when ground towing.
 Never touch the clear plexiglas for any reason.
 Never lift a canopy by the plexiglas or the open vent window.
 Do not scratch the canopies with your (nor your passenger’s) rings, watches, belt
buckles, cellphones, cameras. Just don’t touch!
The Rear Canopy Must Be Closed and Locked First.
The front canopy rear pins slide into white plastic blocks which may assure the rear canopy
is locked down before takeoff. Closing the front canopy first (with the rear canopy open)
will damage the plastic blocks. Take a good look at the canopy hinges, levers and locking
devices. Learn how they work and keep the canopies closed at all times, rear canopy first!
Before takeoff check the front canopy pins have engaged the white plastic blocks behind
you on each side, so the rear canopy is locked down / not open in flight.
Fire Danger: Open canopies have been known to focus the sunlight (like a magnifying
glass) and create a hot spot on the interior, causing a fire. Really!