LET L-23 Super Blanik Technical specifications

LET, 686 04 KUNOVICE, CZECH REPUBLIC
SAILPLANE FLIGHT MANUAL
Serial Nos.eligible : 938101, and subsequend
Model :
L 23 SUPER - BLANIK
Serial No. :
Registration :
948123
N392BA
Document No. : Do - L23 . 1012.5
Date of Issue : December 1, 1993
This sailplane Flight Manual is FAA Aproved for U.S. - registered sailplanes
in accordance with provision of 14 CFR Part 21.29, and as reguired by FAA
Type Certificate Data Sheet No. G60EU.
Approved byTheCivil Aviation Inspectorate ofThe Czech Republic in Prague.
Signature :
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
7
Authority : CAI, Prague
Stamp :
Original date of approval : December 6, 1993
I
This Sailplane Flight Manual must be carried in the sailplane at all times.
This sailplane is to be operated in compliance with information and
limitations contained herein.
1
F .f-e.
I-‘ 9 I
*C

L 23 SUPER - BLANIK
686 04 KUNOVICE
CZECH REPUBLIC
SAILPLANE FLIGHT MANUAL Do - L 23. 1012.5
0.1. RECORD OF REVISIONS
Any revision or amendment of the present Manual will be issued in the
I
form of Bulletins, approved by the Civil Aviation Authority of the Czech
Republic, supplement of which will contain new (revised) pages. User’s
duty is to make a note about revisions in the Record of revisions and to
replace existing pages with revised and effective ones. Revised or
amended parts of the text will be indicated by a vertical line in the left
hand margin and the revision No. and the date will be shown on the
bottom left hand of the page.
Rev.
No.
1.
Affected
Section
0,
2, 6, 7
4. Not
affected
Affected pages Date
0-l, 0-3, 2-5,
2-10, 2-11
, 6-5,
6-6, 6-7, 7-1, 7-4,
7-5
Dec
20/95
0-1, 0-3, 1-1, 1-3,
1-4, 1-5, 2-10,
2-11 , 3-1, 3-2,
3-3, 3-4, 3-5, 4-5,
4-6, 4-7, 7-4, 7-5,
7-6
0-1, 0-3, 0-4, 9-1,
Jan 13/99
9-2, 9-3
Bulletin
No.
L23/026a
L23/029a
L23/030a
L23/035a
Date of
Bulletin
approval
Date inserted and
signature
Dec 2/96
Jan 28/99
Jan 13/99
0
0-1

L 23 SUPER - BLANIK
686 04 KUNOVICE
CZECH REPUBLIC
SAILPLANE FLIGHT MANUAL Do - L 23. 1012.5
Rev. Affected Affected pages
No. Section Date Bulletin
No. Date of
Bulletin
approval
Date inserted and
signature
Dec 1/93 3
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L 23 SUPER - BLANIK
686 04 KUNOVICE
CZECH REPUBLIC
SAILPLANE FLIGHT MANUAL
Do - L 23. 1012.5
0.2. LIST OF EFFECTIVE PAGES
Pages identified as "Appr." provide information reguired to be furnished
by the Federal Aviation Regulations.
Section
0
Page Date
1 Jan 13/99
2
Dec 1/93
3
Jan 13/99
4
Jan 13/99
Section
4
Page
Appr.
15
Appr. 16
Appr. 17
Appr. 18
Appr. 19
Appr. 20
Appr. 21
Appr. 22
Date
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1/93
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Dec 1/93
Dec 1/93
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L 23 SUPER - BLANIK
686 04 KUNOVICE
CZECH REPUBLIC
SAILPLANE FLIGHT MANUAL Do - L 23. 1012.5
0.3. TABLE OF CONTENTS
General
Limitations
Emergency procedures
Normal procedures
Performance
Weight and balance
Sailplane and
systems description
Sailplane handling, care
and maintenance
I
Supplements
( a non-approved section )
(an approved section )
(an approved section )
(an approved section )
(a partly approved section )
( a non-approved section )
( a non-approved section )
( a non-approved section )
(a partly approved section )
Section
1
2
3
4
5
6
7
8
9
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L 23 SUPER - BLANIK
686 04 KUNOVICE
CZECH REPUBLIC
SAILPLANE FLIGHT MANUAL Do
-L 23. 1012.5
SECTION 1
General
CONTENTS
1.1 Introduction
1.2 Certification basis
1.3 Warnings, cautions and notes
1.4 Descriptive data
1 .5.1 Three-view drawing - to ser. No. xx 8320
1.5.2 Three-view drawing
- from ser. No.96 8401
Oct 30/96
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L 23 SUPER - BLANIK
686 04 KUNOVICE
CZECH REPUBLIC
SAILPLANE FLIGHT MANUAL
Do - L 23. 1012.5
1.1 INTRODUCTION
The sailplane flight manual has been prepared to provide pilots with
information for the safe and efficient operation of the L 23
SUPER-BLANIK
sailplane. This manual includes the material required to be furnished to
the pilot by JAR
- 22. It also contains supplemental data supplied by the
sailplane manufacturer.
1.2
CERTIFICATION BASIS
This type of sailplane has been approved by the Civil Aviation Inspectorate
of the Czech Republic in accordance with JAR-22, Change 4 issued April
1, 1980 including Amendment 22/86/1 Eff. Oct. 22, 1986 and AC 21.17-2.
1.3.
WARNINGS, CAUTIONS AND NOTES
The following definitions apply to warnings, cautions and notes used in
the Flight Manual.
WARNING: MEANS THAT THE NON-OBSERVATION OF THE
CORRESPONDING PROCEDURE LEADS TO AN
IMMEDIATE OR IMPORTANT DEGRADATION OF THE
FLIGHT SAFETY
CAUTION: 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.
Note: draws the attention on any-special item not directly related
to safety but which is important or unusual.
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L 23 SUPER - BLANIK
686 04 KUNOVICE
CZECH REPUBLIC
SAILPLANE FLIGHT MANUAL Do - L 23. 1012.5
1.4 DESCRIPTIVE DATA
The L 23 SUPER
- BLANIK sailplane is a cantilever, high-wing, two-seat
glider of all-metal structure. Wing tip extensions are optional.
Basic dimensions
Wing span . . . . . . . . . . . . . . . . . . . . . . . 53.15 ft (16.2 m)
(with the installed wing tip extensions) . . . . . 59.71 ft (18.2 m)
Note: If the wing tip with supporting
wheel is installed wing span is . . . . . . . 53.35 ft (16.26 m)
Length . . . . . . . . . . . . . . . . . . . . . . . . . 27.89 ft(8.5 m)
Height . . . . . . . . . . . . . . . . . . . . . . . . . 6.23 ft(l.9 m)
Wing area . . . . . . . . . . . . . . . . . . . . . . . 206.13 sq ft (19.15 sq.m)
(with the installed wing tip extensions) . . . . . 215.27 sq ft(20.00sq.m)
Aspect ratio . . , . . . . . . . . . . . . . . . . . . . 13.7
(with the installed wing tip extensions) . . . . 16.6
Mean aerodynamic chord . . . . . . . . . . . . . . 4.11 ft(l.253 m)
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L 23 SUPER - BLANIK
686 04 KUNOVICE
CZECH REPUBLIC
SAILPLANE FLIGHT MANUAL
Do - L 23. 1012.5
I
1.5.1 THREE - VIEW DRAWING ( Dimensions in ft ) - valid to ser. No. XX 8320
I
I
I
i
Oct 30/96
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L 23 SUPER - BLANIK
686 04 KUNOVICE
CZECH REPUBLIC
SAILPLANE FLIGHT MANUAL
Do - L 23. 1012.5
1.5.2 THREE - VIEW DRAWING ( Dimensions in ft ) - valid from ser. No. 96 8401
Oct 30/96
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L 23 SUPER - BLANIK
686 04 KUNOVICE
CZECH REPUBLIC
SAILPLANE FLIGHT MANUAL Do
- L 23. 1012.5
SECTION 2
Limitations
CONTENTS
2.1 Introduction
2.2 Airspeed
2.3 Airspeed indicator markings
2.4 Weight
2.5 Centre of gravity
2.6 Approved manoeuvres
2.7 Manoeuvring load factors
2.8 Flight crew
2.9 Kinds of operation
2.10 Minimum equipment
2.11 Aerotow and winch-launching
2.12 Other limitations
2.13 Limitation placards
Appr.
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L 23 SUPER - BLANIK
686 04 KUNOVICE
CZECH REPUBLIC
SAILPLANE FLIGHT MANUAL Do
- L 23. 1012.5
2.1
INTRODUCTION
Section 2 includes operating limitations and basic placards necessary for
safe operation of the sailplane, its standard systems and standard
equipment. The limitations in this section are FAA approved by the CAI,
Czech Republic. The values in parentheses are valid only when using wing
tip extensions.
2.2 AIRSPEED
Speed (KIAS) Remarks
VNE Never exceed speed up
124 Do not exceed this speed in any
to a pressure altitude of operation and do not use more than
13, 780 ft
1/3 of control deflection
VRA Rough air speed
86 Do not exceed this speed except in
smooth air, and then only with
caution, Examples of rough air are
lee-wave rotor thunderclouds etc.
VA
Manoeuvring speed 81
Do not make full or abrupt control
movement above this speed,
because under certain conditions
the sailplane may be overstressed
by full control movement
VW
Maximum
winch- 65 Do not exceed this speed during
launching speed
winch- or autotow-launching
VT
Maximum aerotowing 81 Do not exceed this speed during
speed aerotowing
VLo Maximum landing gear 124 Do not extend or retract the landing
operating speed
gear above this speed
Note:
VNE airspeed limits above 13,780 ft Pressure Altitude are redu-
ced as follows:
*
Pressure Altitude ft *13,780 20,000 25,000 30,000 35,000
VNE KIAS 124 124 116 108 100
(114) (105) (97) (89)
* : Altimeter Setting at 29.92 in.Hg.
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L 23 SUPER - BLANIK
686 04 KUNOVICE
CZECH REPUBLIC SAILPLANE FLIGHT MANUAL
2.3 AIR P
Do - L 23. 1012.5
Normal Operating Range.
(Lower limit is maximum weight
oeuvres must be conducted
caution and only in smooth
Yellow triangle
operations
Approach speed at maximum
weight.
2.4 WEIGHT LIMITS
Maximum take-off and landing weight:
- with two occupants . . . . . . . . . .1124 lb
- with one pilot . . . . . . . . . . . . . . 925 lb
Empty weight
with standard equipment . . . . . . . . 683 lb 2 2 %(695 lb * 2%)
and the corresponding centre
of gravity position . . . . . . . . . . . . 67.30 -c 1% MAC(68.30 t 2% MAC)
Maximum weight of all non lifting parts 778 lb (767 lb)
Note :
Refer to weight and Balance ( Section 6.0 ) to determine actual
empty weight / c.g. as established by the installed equipment
and manufacturing tolerances.
( Cont. )
Appr.
Dec 1/93
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L 23 SUPER - BLANIK
686 04 KUNOVICE
CZECH REPUBLIC
SAILPLANE FLIGHT MANUAL Do
- L 23. 1012.5
Pilot’s weight (including parachute):
- minimum pilot’s weight (solo ) . . . . . . . 154 lb
It is necessary to use front seat removable ballast of 33 lb when flown solo
by a pilot (including parachute) weighing less than 154 lb in the front
cockpit.
Note: Installation of the front seat ballast is described in Section
7, paragraph 7.2 of this Flight Manual.
- maximum pilot’s weight ( solo ) . . . . . . 242 lb
Maximum useful load ( occupants,
baggage, optional equipment ) . . . . . . . 440 lb (430 lb)
Maximum baggage compartment load . . . 22 lb
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L 23 SUPER - BLANIK
686 04 KUNOVICE
CZECH REPUBLIC
SAILPLANE FLIGHT MANUAL Do - L 23. 1012.5
2.5 CENTRE OF GRAVITY
Centre of gravity range
- front limit . , . . . . . . . . . . . . . . . . . . . . 23 % MAC i.e. 4.397 in
(112 mm) aft of
reference datum
-rear limit . . . . . . . . . . . . . . . . . . . . . . 40 % MAC i.e. 12.783 in
(325 mm) aft of
reference datum
Wing tip extensions installation moves the center of gravity of the empty
sailplane 1% MAC (0.493 in = 12.53 mm) to the back.
The reference datum is located 93.6 in aft of the sailplane nose.
2.6 APPROVED MANOEUVRES ( UTILITY CATEGORY )
Sailplane is certified in the Utility Category.
With the installed wing tip extensions all
aerobatic manoeuvres are
prohibited.
Manoeuvre Airspeeds
- KIAS Procedures
SOLO DUAL ENTRY RECOVERY
Loop
86 97 x Section 4.4.6
item
Stall turn 92 97 x Section 4.4.6
item 2.
Lazy Eight 97 97 x Section 4.4.6 item
Spin
32
32 x Section 4.4.6 item
86
86 x
Chandelle (climbing) 97
97
x
Section 4.4.6 item
5.
Steep turn 92 97 x Section 4.4.6 item
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Dec 20/95 (i)
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L 23 SUPER - BLANIK
686 04 KUNOVICE
CZECH REPUBLIC
SAILPLANE FLIGHT MANUAL Do
- L 23. 1012.5
2.7. MANOEUVRING LOAD FACTORS
2
1
0
-1
-2
-3
1
fl -su./-
-WEIGHT 1124 LB
I I I I
1 KIAS
LB
FIG. 2 - 1
2.0 FLIGHT CREW
Minimum - one pilot. Maximum number of occupants is two. If the
sailplane is to be flown solo, the pilot must be sitting in the front seat and
his weight (including parachute) must be 154 lb at least. If the pilot’s
weight is less than 154 lb, it is necessary to use the cushion with 33 lb
ballast.
WARNING: THE REAR SEAT MUST BE SECURED AGAINST FOLDING
AND SAFETY HARNESSES ON THE REAR SEAT MUST BE
CONNECTED, DRAWN TOGETHER AND SECURED.
2.9
KINDS OF OPERATION
The sailplane is approved for Day VFR operations. Cloud- flying is
permitted where operational regulations permit, and the minimum reguired
eguipment is installed and operable.
( Cont. )
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L 23 SUPER - BLANIK
686 04 KUNOVICE
CZECH REPUBLIC
SAILPLANE FLIGHT MANUAL Do
- L 23. 1012.5
WARNING: 1. OPERATIONS IN ICING CONDITIONS ARE PROHIBITED. OPERA-
TIONS ARE LIMITED BY THE INSTALLED EQUIPMENT AS
LISTED IN SECTION 6.
2. AEROBATIC FLIGHT TIME MUST BE RECORDED IN THE
SAILPLANE LOG BOOK TO COMPLY WITH CONTINUED
AIRWORTHINESS REQUIREMENTS.
3. ALL AEROBATIC MANOEUVRES ARE PROHIBITED WITH
INSTALLED WING TIP EXTENSION.
4. WITH INSTALLED WING EXTENSIONS:
ALL FLIGHT TIME WITH WING EXTENSIONS MUST BE
RECORDED IN THE SAILPLANE LOG BOOK TO COMPLY WITH
CONTINUED AIRWORTHINESS REQUIREMENTS.
5. THE NUMBER OF WINCH AND AEROTOW LAUNCHES MUST BE
RECORDED IN THE SAILPLANE LOG BOOK TO COMPLY WITH
CONTINUED AIRWORTHINESS REQUIREMENTS.
2.10 MINIMUM EQUIPMENT
Instruments and minimum equipment must be approved types.
A. Instruments All Operations:
- Airspeed indicator
- Altimeter
- Lap and shoulder straps
B. Additional Instruments required for Cloud flying:
- Magnetic compass
- Turn and bank indicator
- Variometer (Vertical Speed Indicator)
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L 23 SUPER - BLANIK
686 04 KUNOVICE
CZECH REPUBLIC
SAILPLANE FLIGHT MANUAL Do - L 23. 1012.5
2.11
AEROTOW AND WINCH LAUNCHING
Aerotow
- the maximum cable strength or cable safety device (weak link) strength
is 1460 lb.
- maximum permissible speed
VT = 81 KIAS
- the minimum cable length for aerotowing is 50 ft , recommended length
is 100-130
ft .
Winch-launching
- the maximum cable strength or cable safety device ( weak link
)
is 1460 lb .
- maximum permissible speed Vw=65 KIAS
2.12 OTHER LIMITATIONS
A. Maximum crosswind component
- maximum demonstrated crosswind component for safe approach, landing and
aerotow launching is 16 kt for angle 90’.
Maximum demonstrated crosswind component for winch-launching:
E
24 n
Q)
5
22 kl
20 n
18 h
z 18 kt
a 14 n
c 12 n
.-
s
v)
10 kt
2 8kt
0 6H
4h
2kl
ANGLE TO WIND DIRECTION
FIG. 2 - 2
B.Maximum demonstrated operating altitude - 13, 780 ft
( Cont. )
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L 23 SUPER - BLANIK
686 04 KUNOVICE
CZECH REPUBLIC
SAILPLANE FLIGHT MANUAL Do
- L 23. 1012.5
C. Maximum Tire Pressure 37 psi.
D. Continued Airworthiness Life Limits:
The initial sailplane service life is specified to 6000 flight hours and
30000 landings under the following operating conditions:
- Max. 4.83 take-offs per 1 flight hour;
- The winch launching - aerotow take-off ratio is 5 : 1;
- Crew: 35% double, 65% single;
- Elementary training-to-advanced training and to performance soaring
ratio is 40% :
60%, whereby the aerobatics share is 2% of the total
operation.
Sailplane life LBversus operation with wing tip extensions is
LB = 6000 - 25.x (where x is operation with wing tip extensions in
percents of the total operation time)
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L 23 SUPER - BLANIK
686 04 KUNOVICE
CZECH REPUBLIC
SAILPLANE FLIGHT MANUAL Do - L 23. 1012.5
2.13 LIMITATIONS PLACARDS
The following operating limitations are emphasized on the limitation
placards in both cockpits:
a) front cockpit
SEAT BACK PEDAL ADJUSTMENT
‘MIN. PILOT‘S WEIGHT FOR SOLO FLIGTS:
- WITHOUT BALLAST 154 LB
- WITH 33 lb BALLAST 121 LB
1
1%
b) both front and rear cockpits
AIR BRAKES
LANDING GEAR
E3
CANOPY LIFT OFF
From ser. No. 96 8401
[Gx]
0
5’
3%
. ‘8,
0
-n4
AIR VENT
FRONT LIFT OFF
para 3.2.1
To ser. No. xx 8320
JETTISON/LIFT OFF
( REAR SEAT ONLY)
see para 3.2.1
To ser. No. xx 8320
FRONT CANOPY JETTISON
see para 3.2.1
To ser. No. xx 8320
para
CANOPY JETTISON
see para 3.2.2
From ser. No. 96 8401
(z5)
WHEEL BRAKE
BAGGAGE
( REAR SEAT ONLY)
Appr. @
Oct 30/96
2-10