Schempp-Hirth Flugzeugbau Duo Discus Technical specifications

SCHEMPP-HIRTH FLUGZEUGBAU GMBH, KIRCHHEIM/TECK
SCHEMPP-HIRTH FLUGZEUGBAU GMBH, KIRCHHEIM/TECK
Duo Discus
FLIGHT MANUAL
FLIGHT
:for
MAN U A L
0.1
Record of revisions
Sailplane
Any revIsions of the present manual, except actual
weighing data, must be recorded in the following
table and in the case of approved sections be en-
dorsed by the responsible airworthiness authority.
Model
Serial-No.
Registr.-No.
Date of' Issue
414
N 9 0 B P
october 1993
The new or amended text in the revised page will be
indicated by a black vertical line in the left hand
margin, and the revision number and the date will
be shown on the bottom left hand side ot the page.
Pages as indicated by "LBA-app." are approved
by
LUFTFAHRT BUNDESAMT
Signature
Authority
Stamp
Original date
21, Marz t9S~ of' approval
This sailplane is to be operated in compliance
with information and limitations contained
herein.
Approval o~ translation has been done by best kno~ledge and jUdgement.
In any case the original text in German language is authoritative.
0.1.1

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77.2.1 An.:'
Hll 396-2
~
April 1994
MIl 396-2
--
200.2.5
44.2.2
April 1994
MIl 396-3
300.2.5
44.5.3.1
Dezember 1994 FAA
400.1.2
0.2.5
0.2.6
0.2.8
44.3.3
Feb 96 TIl 396-3 und/
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Feb 96
and
MIl 396-7
4.5.1.2
Feb 96
""
4.5.3.3
Feb 96
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55.2.1
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5.2.2
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5.3.2.1
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77.3.2
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7.6
Feb 96
•"
MIl: Modification Bulletin - Anderungsb1att
TIl: Technical Note - Technische Mitteilung
0.1.2
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600.2.5 Z
4. JULI 2[ 01
376-:S
44.2.2 June 2001 MB.300-3
. «
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TN :Technical Note-Technlsche Mitteilung
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0.2.8

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9.1.2
Ok't. 199'>
9.2
I
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Duo Discus
O.J Table of contents
FLIGHT MANUAL
Section
Duo Discus
Section
FLIGHT MANUAL
General (a non-approved section)
Limitations (an approved section)
Emergency procedures (an'approved aection)
Normal procedures (an approved section)
Performance (a partly approved section)
Weight and balance (a non-approved section)
Sailplane and systems description
(a non-approved section)
Sailplane handling, care and maintenance
(a non-approved section)
Supplements
1.
General
1 • 1
Introduction
2
1.2
Certification
basis
J
I.J
Warnings,
cautions and notes
4
1.4
Descriptive
data
5
1.5
Three-side
vie",
6
7
8
9
o. J. 1
0.J.2

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Duo Discus
Section 2
2. Limitations
FLIGHT MANUAL
Duo Discus
Section)
FLIGHT MANUAL
2.1
2.2
Introduction
Airspeed
). Emergency procedures
2.)
2.4
2.5
2.6
2.7
2.8
2.9
2.10
2.11
2.12
2.1)
2.14
2.15
Airspeed indicator markings
(reserved)
(reserved)
Weights (masses)
Center of gravity
Approved maneuvers
Maneuvering load factors
Flight crew
Kinds of operation
Minimum equipment
Aerotow and winch launch
other limitations
Limitation placards
D.).)
).1 Introduction
).2 Canopy jettisoning
).) Bailing out
).4
Stall recovery
).5
Spin recovery
).6 Spiral dive
recovery
).7 (reserved)
).8
(reserved)
).9
other
emergencies
0.).4

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Duo Discus
Section 4
4. Normal operating procedures
FLIGHT MANUAL
Duo Discus
FLIGHT MANUAL
Section 5
4.1
4.2
Introduction
Rigging and de-rigging
5·
5·1
Performance
Introduction
4.) Daily inspection'
4.4
Pre-flight inspection
5.2
LBA-approved data
4.5 Normal procedures and recommended speeds
Airspeed indicator system calibration
4.5.1
4.5.2
4.5.)
4.5.4
4.5.5
4.5.6
4.5.7
4.5.8
4.5.9
Methods of launching
(reserved)
Flight
Approach
Landing
Flight vith vater ballast
High altitude flight
Flight in rain
Aero,batics
0.).5
5.2.2
5·2.)
5.2.4
5·)
5. J. 1
5.).2
Stall speeds
(reserved)
Additional information
Additional information
LEA-approval not required
Demonstrated crossvind performance
Flight polar
0.).6

Duo Discus
SCHEMPP-HIRTH FLUGZEUGBAU GMBH, KIRCHHEIM/TECK
FLIGHT MANUAL
SCHEMPP-HIRTH FLUGZEUGBAU GMBH, KIRCHHEIM/TECK
Duo Di scu s FLIGHT MANUAL
Section 9
Section
8
8.
8.1
8.2
8.3
8.4
8·5
sailplane handling, care and maintenance
Introduction
Sailplane inspection periods
Sailplane alterations or repairs
Ground handling / road transport
Cleaning and care
0·3·9
9.
9.1
9.2
Supplements
Introduction
List of inserted supplements
0.).10

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Section
1. General
1.1 Introduction
1.2 Certification basis
1.3 Warnings, cautions and notes
1.4 Descriptive data
1.5 Three-side view
october 1993
Revision
FLIGHT MANUAL
1. 1. 1

SCHEMPP-HIRTH FLUGZEUGBAU GMBH, KIRCHHEIM/TECK SCHEMPP-HIRTH FLUGZEUGBAU
GMBH, KIRCHHEIM/TECK
Duo Discus
1.1 Introduction
FLIGHT MANUAL
Duo Discus
1.2 Certification Basis
FLIGHT MANUAL
This sailplane, model designation
The Flight Manual for this sailplane has been
prepared to provide pilots and instructors with
information for the safe and efficient operation
of the "Duo Discus".
" Duo
Discus",
This manual includes the material required to be
furnished to the pilot by "JAR", Part 22.
It also contains supplemental data supplied by
the manufacturer of the sailplane.
has been approved by the Luftfahrt Bundesamt (LBA)
in compliance with "JAR", Part 22, effective on
June 27, 1989 (Change 4 of the English Original
Issue), including additional Amendments 22/90/1,
22/91/1 and 22/92/1.
The LBA Type Certificate is No. 396 and was
issued on March 21st, 1994
October 1993
RevisIon
1.1.2
Category of Airworthiness
October 1993
Revision
UTILITY
1.2

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SCHEMPP-HIRTH FLUGZEUGBAU GMBH, KIRCHHEIM/TECK
FLIGHT MANUAL
Duo Di sous
FLIGHT MANUAL
1.4 Descriptive data
1.3
Warnings, cautions and notes
The following definitions apply to warnings,
cautions and notes used in this flight manuall
The "Duo Discus" is a two-seat sailplane for advanced
training and cross-country flying, constructed from
glass and carbon fiber reinforced plastIc (GFRP/CFRP),
featuring a T-tail (with fixed horiz. stabilizer and
elevator).
"WARNING"
"CAUTION"
"NOTE"
means that the non-observation of the
corresponding procedure leads to an
immediate or important degradation of
the flight safety
means that the non-observation of the
corresponding procedure leads to a
minor or to a more or less long term
degradation of the flight safety
draws the attention on any special
item not directly related to safety,
but which is important or unusual.
.J!i~g_
The wing is four-stage trapezoid in planform, consists
of two main panels with tip extension (having a swept-
back leading edge) and has double-panel "Schempp-Hirth"
type airbrakes on the upper surface. Ailerons are in-
ternally driven.
The integral water ballast tanks have a total capacity
of approx. 198 Liter (52.3 US Gal., 43.5 IMP Gal.).
The wing shells are a glass fiber/foam-sandwich con-
struction with spar flanges of carbon fiber rovings
and shear webs made as a GFRP/foam-sandwich.
!.u!!..e.!.a~e_
The cockpit is comfortable and features two seats in
tandem. The one-piece canopy hinges sideways and opens
to the right. The fuselage is constructed as a pure glass
fiber non-sandwich shell and is thus highly energy ab-
sorbing. While its aft section is stiffened by GFRP/foam-
sandwich bulkheads and webs, the cockpit region is rein-
forced by a double skin on the sides, with integrated
canopy coaming frame and seat pan mounting flanges. The
main wheel is retractable and features a hydraulic disc
brake I nose wheel and tail wheel (or skid) are fixed.
~o~i~o~t~l_t~i~p~a~e_
The horiz. tailplane consists of a fixed stabilizer with
elevator. The stabilizer is a GFRP/foam-sandwich construc-
tion with CFRP-reinforcements, the elevator halves are a
pure CFRP/GFRP shell.
The spring trim is gradually adjustable by a lever
resting against a threaded rod.
Vertical tail
Fin and rudder are constructed as a GFRP/foam-sandwich.
On request a water ballast trim tank with a capacity of
11 Liter (2.9 US Gal., 2.4 IMP Gal.) is provided in the
fin •
.Q.o~t!:.o.!.s_
All controls are automatically hooked up when the sail-
plane is rigged.
October 1993
Revision
1.3
October 1993
Revision 1.4.1

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FLIGHT MANUAL
Duo Discus
TECHNICAL DATA
FLIGHT MANUAL
.!!.i!!.g_
Span
20.00 m
65.62 f"t
Area
16.40
2
176 •.53
ft
2
m
Aspect ratio
24.4
MAC
0.87.5 m
2.87 ft
Length
Width
Height
8.62 m
0.71 m
1.00 m
28.28 ft
2.33 ft
J.28 ft
October 1993
Revision
Mass Empty mass
approx.
420 kg
926
lb
Maximum
all-up mass
700
kg
154)
Ib
Wing loading
29.9
-
42.7 kg/m
2
6.1
-
8.7 Ib/ft
2
October 1993
Revision

SCHEMPP-HIRTH FLUGZEUGBAU GMBH, KIRCHHEIM/TECK
Duo Discus
1.5 Three-side view
\
~\'-----_/
====
october 1993
Revision
}
U
====:=;,
FLIGHT MANUAL
/iii
ISCUS
1.5

SCHEMPP-HIRTH FLUGZEUGBAU GMBH, KIRCHHEIM/TECK SCHEMPP-HIRTH FLUGZEUGBAU
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Duo Discus
Section 2
2. Limitations
FLIGHT MANUAL
Duo Discus
2.1 Introduction
FLIGHT MANUAL
2.1
2.2
2.)
2.4
2.6
2.7
2.8
2.10
2.11
2.12
2.1)
2.14
2.15
Introduction
Airspeed
Airspeed indicator markings
(reserved)
(reserved)
Weights (masses)
Center of gravity
Approved maneuvers
Maneuvering load factors
Flight crew
Kinds of operation
Minimum equipment
Aerotow and winch launch
other limitations
LimiLaLion piacard~
Section 2 includes operating limitations, instru-
ment markings and basic placards necessary for
safely operating the sailplane, its standard
systems and standard equipment.
The limitations included in this section and in
section 9 have been approved by the Luftfahrt
Bundesamt (LBA), Braunschweig.
October 199)
Revision
2.1.1
October 199)
Revision
2.1.2

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FLIGHT MANUAL
Duo Discus
FLIGHT MANUAL
2.2
Airspeed
Airspeed
limitations and their operational signi~i
cance are shown belows
2·3
Airspeed indicator markings
Airspeed indicator markings and their colour code
signiricance are shown beiowl
SPEED
(lAS)
REMARKS
V
NE
Never exceed speed
250 km/h
Do not exceed this speed
in
in calm air
135
kt any operation and do not use
155
mph
more than 1/3 of control
de-
flection.
V
RA
Rough air
speed
180 km/h
Do not exceed this speed 6X-
97 kt cept in smooth air, and then
112
mph
only with caution.
Rough air ia met in lee-
weve rotors,
thunderclouds
etc.
VA
Maneuvering speed
180 km/h
Do not make full or abrupt
97
kt control movements above thia
112
mph speed es the aircraft struc-
ture might get overstressed.
V
T
Maximum speed 180 km/h Do not exceed this speed
on aerotolol 97 kt during an aero tow.
112 mph
V
w
Maximum blinch 150 km/h Do not
exceed this speed
launch speed
81
kt during awinch launch.
93
mph
V
LO
Maximum landing 180 km/h Do not extend or retrect
gear operating
97
kt landing gear abova this
speed
112
mph
speed.
MARKING
VALUE OR RANGE
SIGNIFICANCE
(lAS)
Green arc 90 -180 km/h Normal
oparating range
49 -97
kt
(Lower limit is
tha spead 1.1
V
S1
56 -112
mph
at maximum mass and clg
in most
forward position.
Uppar limit is
the max.
permissible
speed in rough air).
Yellow erc 180 -250 km/h Maneuvers must be
conducted with
97 -135
kt
caution and operating in rough air
112 -155 mph
is not permitted.
Red lina
st 250
kmftl
Maximum speed for sll operations.
135 kt
155 mph
Yellow
triangle
at
100
kmfh
Approach speed st maximum mass
54
kt without watar ballast.
62 mph
January 2000
Revision 5
TN 396 5
MB 396 - 10
LBA-app.
2.2
October 1993
Revision
LBA-app.
2.3

Duo Discus
SCHEMPP-HIRTH FLUGZEUGBAU GMBH, KIRCHHEIM/TECK
FLIGHT
MANUAL
Duo Discus
SCHEMPP-HIRTH FLUGZEUGBAU GMBH, KIRCHHEIM/TECK
FLIGHT
MANUAL
2.6 Weights (masses)
2.7 Center of gravity
Maximum permitted take-off mass
Maximum permitted landing mass
Maximum permitted take-off and
landing mass wit h0u t
water ballast
Maximum permitted mass of all
non-lifting parts
Maximum permitted mass in
baggage compartment
700 kg (1543 lb)
700 kg (1543 lb)
660 kg (1455 lb)
440 kg ( 970 lb)
Sailplane attitude:
Datum
Maximum forward
c/g position
Maximum rearward
c/g position
Tail jacked up such that a wedge-
shaped block, 100 : 4.5, placed
on the rear top fuselage, is
horizontal along its upper edge.
Wing leading edge at root rib
45 mm (1.77 in.) aft of datum
plane
250 mm (9.84 in.) aft of datum
plane
It is extremely important that the maximum rearward
c/g position is not exceeded.
This requirement is met when the minimum front seat
load is observed.
The minimum front seat load is given in the loading
table and is shown by a placard in the cockpit.
A lower front seat load must be compensated by
ballast see section 6.2 "Weight and Balance
Record / Permitted Payload Range".
October 1993
Revision
LBA-app.
2.6
October 1993
Revision
LBA-app.
2.7

SCHEMPP-HIRTH FLUGZEUGBAU GMBH, KIRCHHEIM/TECK SCHEMPP-HIRTH
FLUGZEUGBAU GMBH, KIRCHHEIM/TECK
Duo Discus
FLIGHT MANUAL
Duo Discul'l
FLIGHT MANUAL
2.8
Approved maneuvers
The sailplane model "Duo Discus" is certified in
category
Maneuvering load factors
The following maneuvering load factors must not be ex-
ceeded when the sailplane is pulled UPl
UTI LIT Y
for normal sailplanes.
a)
with airbrakes locked and at VA
180 km/h, 97 kt, 112 mph
WARNINGs
Aerobatic maneuvers and cloud flying
not approved!
n
n
+ 5·3
- 2.65
With airbrakes locked and at V
NE
250 km/h, 135 kt, 155 mph
n
n=
+ 4.0
- 1.5
b) With airbrakes extended, the maximum maneuvering
load factor is
October 1993
Revision
LBA-app.
2.8
October 1993
Revision
n
LBA-app.
2.9