Schempp-Hirth Discus CS User manual

Skyline Soaring Club
Discus CS Assembly
18 Nov 2017

Discus CS Assembly Checklist
Setup Prep
•Trailer in location where assembly will not block other
aircraft
•Trailer chocked, brake on, clamshell open, aft door
down in contact
•Pull ramp out, fold center rail into place
•Tail boom unlashed , lifting strap available
•Wing dolly and wing stand assembled and ready
•Wipe clean and grease all wing and fuselage attach
fittings &control fittings
Position Fuselage
•Roll fuselage out until tail wheel is at end of ramp
•Use lifting strap, lift tail boom, roll out until fuselage
dolly at end of ramp
•Open canopy, remove rigging tool, screw into vertical
tail assembly hole
•Confirm spoilers are closed but unlocked, dump valve
closed (forward)
•Clean and lubricate main spar pin
•Remove strap securing fuselage to dolly
Mate Wings to Fuselage
•Position wing dolly parallel to fuselage at trailing edge
of left wing fairing
•Lift and walk left wing out until it can be lowered into
wing dolly
•Bend in leading edge of wing (fill port) should be just
outside dolly cradle
•Position wing so spar lines up with hole, rotate cradle
level, insert spar end
•Clean & lubricate both sides of fittings –2 lift pins,
spar end pin, main pin hole
•Align wing and push into place, insert main spar pin 1”,
handle towards left
•Put wing stand under left wing, reposition dolly and
repeat for right wing
•When both wings are seated, insert main spar pin fully,
safety clip end
7 Jan 2018
Attach Horizontal Stabilizer
•Clean and lubricate all fittings
•Insert aft edge of horizontal stabilizer against elevator
control pins
•Pull on rigging tool, press down on leading edge until
pin seats
•Remove rigging tool
Landing Gear
•Ensure fuselage dolly clear of gear door
•Crank ramp jackscrews to raise fuselage dolly enough
for gear to extend
•Actuate landing gear handle to full forward position,
confirm down & locked
•Remove tail stand and wing dollies or stands
•Lower ramp and fuselage dolly until weight is
supported on gear
Final Prep
•Remove original wingtips, replace with winglet tips
using rigging tool.
•Tape wing roots, wing tips, horizontal tail and tool hole
•Ensure parachute is in cockpit, rigging tool in side
pocket
•Check required paperwork in cockpit
•Install and secure charged batteries, confirm radio and
variometer work
•Lower ramp until weight is entirely on gear, roll glider
clear
•Put equipment and ramp back in trailer and secure
trailer
•Independent final assembly check –spar pin and clip,
batteries secure, flight controls connected, canopy
locks, release functional, brake functional
•Positive Control Check completed
•Canopy in place and properly secured
(Disassemble in reverse order)

Prepare the Trailer (1)
Position the trailer where it will not block
other aircraft from taxiing, chock wheels
Pull safety clips and latch pins, open
latches at aft end of trailer
Raise the trailer clamshell top, check for
overhead obstacles and internal loose items
Release the sliding latch pin from the left
side of the aft lower door
1 2
3 4

Prepare the Trailer (2)
Open the lower aft door and allow it to hang,
note if not enough space
Check parking brake set, lower tongue if
needed so aft door hangs free, then raise
When aft door is straight down and firmly
set, trailer is stabilized and ready to unload
Pull out the sliding ramp, check alignment,
unfold the center rail
1 2
3 4

Position the Fuselage
Unfasten and open the tail boom tie-down
strap
Roll the tail out until the tail wheel is at the
aft stop of the ramp, monitor boom clearance
Using a lifting strap, lift the tail boom and walk
it aft until fuselage dolly is at end of ramp
Open canopy, check cockpit condition, locate
spar pin, rigging tool, winglets, checklist
1 2
3 4

Prepare the Fuselage
Check dump valve closed (right side) and
airbrakes unlocked (left side)
Unfasten and remove the tie-down strap that
runs through the spar opening
Assemble and position the wing dolly near
the wing trailing edge
Remove the wingtip covers and reposition
them on the aft corners of the trailer sides
1 2
3 4

Position the Left Wing
Lift and walk the tip of the left wing out,
dolly should be inside bend in leading edge
From the spar end, reposition the wing to
align perpendicular to fuselage
Rotate wing to level, rest end of spar in hole,
clean & lube 7 pins and receivers
Ease wing into position, keeping pins aligned,
refine wing dolly height if needed
1 2
3 4

Secure the Left Wing
Remove main spar pin from its bag, clean
and lubricate
Insert spar pin only one inch into left wing
spar, rotate handle to left side wall
Position wing stand 2/3 of the way out the
wing, then lower and remove wing dolly
Check left wing alignment and elevation
from right side spar alignment marks
1 2
3 4

Mate the Right Wing
Repeat process for right wing, remember to
clean and lube spar pin and end fittings
Complete positioning and alignment of left
wing, elevation is critical, insert wing fully
Safety clip for the main spar pin is stowed on
the parachute static line ring, left aft cockpit
With main spar pin fully seated, secure with
safety clip
1 2
3 4

Secure Horizontal Tail and Winglets
Pull pin to release tail strap at top of
clamshell, remove tail
Clean and lubricate elevator bayonet pins and
forward attach point fittings
Slide tail onto aft pins, pull rigging tool to open
forward fitting, seat and close, remove tool
Remove stock wing tips, align winglet spar
pin, push in to seat
1 2
3 4

Finish Up
Using the jack handle, raise the ramp, lower
the gear, then lower the ramp, freeing glider
Install TE probe, tape wing roots, winglets,
and tail rigging hole
Secure batteries, one behind seat back, one
under instrument panel, check circuits
Install tail dolly, check tire pressures, move
glider from trailer area, secure trailer
1 2
3 4