Sportine Aviacija LAK-17B FES mini Technical specifications


Joint Stock Company "SPORTINĖ AVIACIJA ir Ko"
Pociūnų km., Ašminto en., LT-59327, Prienai, Republic of Lithuania
tel.: [phone] ● fax:[phone] ● e-mail: [email protected] ● www.lak.lt
FLIGHT MANUAL
 
!
""
I ue No. 1
Type: LAK-17
Model: LAK-17B FES
Variant: LAK-17B FES mini
Serial Number: _______________
Regi tration: _______________
Date of I ue: _______________
It i a preliminary manual. The ailplane i not certified and ha not hown
compliance with airworthine requirement .
Limitation in “Pilot instruction 17B FES mini-PI-01-00; date: 2019 05 15” are
mandatory until the ailplane i certified.
Thi ailplane i to be operated in compliance with the regulatory information and
limitation contained herein.

AK-17B FES mini Flight Manual
Chapter 0
0.1 Record of revisions
Any revi ion of the pre ent manual, except actual weighing data, mu t be recorded
in the following table and in the ca e of approved Chapter , endor ed by the
re pon ible airworthine authority.
The new or amended text in the revi ed page will be indicated by a black vertical
line in the left hand margin, and the revi ion number and date will be hown on the
bottom left hand of the page.
Rev.
No.
Affected
Chapter
Affected
Page
Date of I ue Approval Date of
approval
Date of
In ertion
Signature
Rev. 1 — Title Page 2020 01 06
I ue 1 Date: 6 January 2020 Page i
Rev. 1

AK-17B FES mini Flight Manual
Intentionally left blank
I ue 1 Date: 6 January 2020 Page ii
Rev. 1

AK-17B FES mini Flight Manual
0.2 List of effective pages
Chapter Page Date of I ue Chapter Page Date of I ue
0 i 10 Dec 2018 3 3-1 10 Dec 2018
ii 10 Dec 2018 3-2 10 Dec 2018
iii 10 Dec 2018 3-3 10 Dec 2018
iv 10 Dec 2018 3-4 10 Dec 2018
v 10 Dec 2018 3-5 10 Dec 2018
vi 10 Dec 2018 3-6 10 Dec 2018
3-7 10 Dec 2018
1 1-1 10 Dec 2018 3-8 10 Dec 2018
1-2 10 Dec 2018 3-9 10 Dec 2018
1-3 10 Dec 2018 3-10 10 Dec 2018
1-4 10 Dec 2018 3-11 10 Dec 2018
1-5 10 Dec 2018 3-12 10 Dec 2018
1-6 10 Dec 2018 3-13 10 Dec 2018
1-7 10 Dec 2018 3-14 10 Dec 2018
1-8 10 Dec 2018 3-15 10 Dec 2018
3-16 10 Dec 2018
2 2-1 24 May 2019 3-17 10 Dec 2018
2-2 24 May 2019 3-18 10 Dec 2018
2-3 24 May 2019 3-19 10 Dec 2018
2-4 24 May 2019 3-20 10 Dec 2018
2-5 24 May 2019
2-6 24 May 2019 4 4-1 24 May 2019
2-7 24 May 2019 4-2 24 May 2019
2-8 24 May 2019 4-3 24 May 2019
2-9 24 May 2019 4-4 24 May 2019
2-10 24 May 2019 4-5 24 May 2019
2-11 24 May 2019 4-6 24 May 2019
2-12 24 May 2019 4-7 24 May 2019
4-8 24 May 2019
I ue 1 Date: 6 January 2020 Page iii
Rev. 1

AK-17B FES mini Flight Manual
Continued
Chapter Page Date of I ue Chapter Page Date of I ue
4 4-9 24 May 2019 7 7-1 24 May 2019
4-10 24 May 2019 7-2 24 May 2019
4-11 24 May 2019 7-3 24 May 2019
4-12 24 May 2019 7-4 24 May 2019
4-13 24 May 2019 7-5 24 May 2019
4-14 24 May 2019 7-6 24 May 2019
4-15 24 May 2019 7-7 24 May 2019
4-16 24 May 2019 7-8 24 May 2019
4-17 24 May 2019 7-9 24 May 2019
4-18 24 May 2019 7-10 24 May 2019
4-19 24 May 2019 7-11 24 May 2019
4-20 24 May 2019 7-12 24 May 2019
7-13 24 May 2019
5 5-1 24 May 2019 7-14 24 May 2019
5-2 24 May 2019
5-3 24 May 2019 8 8-1 10 Dec 2018
5-4 24 May 2019 8-2 10 Dec 2018
5-6 24 May 2019 8-3 10 Dec 2018
8-4 10 Dec 2018
6 6-1 10 Dec 2018
6-2 10 Dec 2018 9 9-1 10 Dec 2018
6-3 10 Dec 2018
6-4 10 Dec 2018
6-5 10 Dec 2018
6-6 10 Dec 2018
6-7 10 Dec 2018
6-8 10 Dec 2018
6-9 10 Dec 2018
6-10 10 Dec 2018
I ue 1 Date: 6 January 2020 Page iv
Rev. 1

AK-17B FES mini Flight Manual
Table of contents
Chapter
#$% (a non-approved chapter).............................................................1
&&&'$ (an approved chapter)...........................................................2
%#$()!%'(*+% (an approved chapter)...............................3
$'%!%'(*+% (an approved chapter)........................................4
!%'%$( (a partly approved chapter)..............................................5
,&#-$*$(./+&!$&
(a non-approved chapter)..................................................................................6
&!$$*)*(%&!&'$
(a non-approved chapter)..................................................................................7
&!$-$*&$#0(%$*&$$$(
(a non-approved chapter)..................................................................................8
+!!$ (a non-approved chapter)...................................................9
I ue 1 Date: 6 January 2020 Page v
Rev. 1

AK-17B FES mini Flight Manual
Intentionally left blank
I ue 1 Date: 6 January 2020 Page vi
Rev. 1

AK-17B FES mini Flight Manual
Chapter 1
GENERAL
Table of Contents
1.1 Introduction....................................................................................................1 - 2
1.2 Certification ba i ...........................................................................................1 - 2
1.3 Warning , caution and note .........................................................................1 - 2
1.4 De criptive data..............................................................................................1 - 3
1.5 Three-view drawing.......................................................................................1 - 6
1.6 Abbreviation ..................................................................................................1 - 7
1.7 Unit conver ion..............................................................................................1 - 7
I ue 1 Date: 10 December 2018 Page 1-1
Rev. 0

AK-17B FES mini Flight Manual
1.1 Introd ction
The ailplane flight manual ha been prepared to provide pilot and in tructor with
information for the afe and efficient operation of the AK-17B FES mini ailplane
with Front Electric Sy tem.
Thi manual include the material required to be furni hed to the pilot by CS-22. It
al o contain upplemental data upplied by the ailplane manufacturer.
1.2 Certification basis
Thi type of ailplane ha been de igned in accordance with CS 22 Certification
Specification for Sailplane and Powered Sailplane , Amendment 2, 5 March
2009 and in accordance with Special Condition i ue for FES.
Category of Airworthine : Utility.
1.3 Warnings, ca tions and notes
The following definition apply to warning , caution and note u ed in the flight
manual:
Warning
Mean that the non-ob ervation of the corre ponding procedure
lead to an immediate or important degradation of the flight
afety.
Ca tion
Mean that the non-ob ervation of the corre ponding procedure
lead to a minor or to a more or le long term degradation of
the flight afety.
Note
Draw the attention on any pecial item not directly related to
afety by which i important or unu ual.
I ue 1 Date: 10 December 2018 Page 1-2
Rev. 0

AK-17B FES mini Flight Manual
1.4 Descriptive data
The AK-17B FES mini i a modification of the ingle eat high performance
ailplane of FAI 15 m – 18 m cla LAK-17A de igned according to CS-22,
category “U” pecification . It i a mid-wing powered glider with flap , T-tail,
retractable main landing gear and 82 (optionally 134) liter [21.6 (optionally 35.4)
US gal] water balla t. Sailplane i equipped with Front Electric Sy tem.
AK-17B FES mini i a powered ailplane. It i approved for take-off by ole
mean of it own power.
Main part of the FES y tem are:
•Bru hle electric motor,
•Controller for motor,
•Foldable propeller,
•FES BATTERY PACK GEN2 with internal BMS (Battery Management
Sy tem),
•Charger (one 1200 W or two 600 W),
•FCU (FES control unit) in trument,
•LXUI box with Shunt (for current and voltage mea urement ),
•FCC box (FES connecting circuit),
•Power witch,
•DC/DC converter (convert high voltage to 12 V).
The ailplane i made of hybrid compo ite material (Kevlar, carbon and
fibergla ). The wing par i made of modern carbon rod (3.16 x 3.16 mm) and
ha a double T ection. The airbrake are located on the upper wing urface only.
The wing airfoil are de cribed in Table 1.4-1.
I ue 1 Date: 10 December 2018 Page 1-3
Rev. 0

AK-17B FES mini Flight Manual
12
[m] c [m] Airfoil
13.5 m
0.28 0.729 LAP 92-130/15mod
0.48 0.729 LAP 92-130/15
4.6 0.625 LAP 92-130/15
6.635 0.35 LAP 90-150/15
The cockpit i of monocoque con truction. The manually controlled eat back and
an adju table head re t together with optimally arranged control offer notable
comfort for the long flight . The one piece Plexigla canopy hinge forward. On
the left ide there i a liding window for additional ventilation. The in trument
panel fold up together with a canopy.
The retractable landing gear with hock ab orber ha a 4.00-4" 8 PLY To t Aero
tire. The BERINGER main wheel brake i actuated by the lever on control tick, or
via the airbrake control handle (optionally). The rudder pedal are adju table in
flight. All control , including the water balla t y tem, hook up automatically or
emi-automatically. Towing hook are mounted: near the main landing gear (C.G. /
winch / auto-tow hook) and/or in front of the pilot cockpit at the bulkhead (aero
tow hook). Both towing hook are operated by the ame handle. The wing
incorporate fork-type par tip , joined with two pin .
The T-tail (fixed tabilizer with elevator) of the AK-17B FES mini provide table
and re pon ive pitch characteri tic . The elevator hook up automatically during
a embly. The glider i fitted with a fin balla t tank of 8 ltr (2.11 US gal) capacity
in order to adju t the optimum C.G. po ition. The antenna i mounted in the
vertical fin.
FES parameter are controlled by the FCU in trument, produced by LX NAV d.o.o.
company. The engine i operated with the Power and brake button located on the
FES in trument. Electronic afety device are provided to avoid mi operation.
Technical data of the AK-17B FES mini ailplane i hown in Table 1.4-2.
I ue 1 Date: 10 December 2018 Page 1-4
Rev. 0

AK-17B FES mini Flight Manual
123
Wing pan 13.5 m (44.29 ft)
Fu elage length 6.53 m (21.42 ft)
Height 1.32 m (4.33 ft)
Max gro weight 350 kg (771.6 lb )
Mean aerodynamic chord 0.638 m (25.12 in)
Wing area 8.41 m2 (90.52 ft2)
Wing loading (minimum) 32.94 kg/m2 (6.75 lb /ft2)
Wing loading (maximum) 41.61 kg/m2 (8.52 lb /ft2)
I ue 1 Date: 10 December 2018 Page 1-5
Rev. 0

AK-17B FES mini Flight Manual
1.5 Three-view drawing
I ue 1 Date: 10 December 2018 Page 1-6
Rev. 0

AK-17B FES mini Flight Manual
1.6 Abbreviations
CAS calibrated air peed mean indicated air peed of a ailplane, corrected
for po ition (due to po ition of pre ure port on ailplane) and
in trument error. Calibrated air peed i equal to true air peed in
tandard atmo phere at ea level
C.G. center of gravity
daN decanewton
h hour
IAS indicated air peed mean the peed of a ailplane a hown on it pitot
– tatic aircraft indicator and i uncorrected for the y tem error
m meter
kg kilogram
km kilometer
econd
ltr liter
1.7 Unit conversion
1 bar = 14.5 pound per quare inch (p i);
1 decanewton (daN) = 2.25 pound force;
1 kilogram (kg) = 2.2 pound (lb );
1 meter (m) = 39.4 inche (in.) = 3.28 feet (ft.);
1 millimeter (mm) = 0.0394 inche (in.);
1 liter = 0.2642 U.S. gal;
1 quare meter (m2 ) = 10.764 q. ft;
1 kg/m2 = 0.204 lb / q. ft;
1 m/ = 1.944 knot (kt );
1 km/h = 0.5396 kt ;
1 kW = 1.34 HP.
I ue 1 Date: 10 December 2018 Page 1-7
Rev. 0

AK-17B FES mini Flight Manual
Intentionally left blank
I ue 1 Date: 10 December 2018 Page 1-8
Rev. 0

AK-17B FES mini Flight Manual
Chapter 2
LIMITATIONS
Table of Contents
2.1 Introduction....................................................................................................2 - 2
2.2 Air peed..........................................................................................................2 - 2
2.3 Air peed indicator marking ...........................................................................2 - 4
2.4 Power-plant information and operation limitation ........................................2 - 5
2.4.1 Power-plant............................................................................................2 - 5
2.4.2 Battery pack .........................................................................................2 - 6
2.5 Ma (weight).................................................................................................2 - 6
2.6 Center of gravity.............................................................................................2 - 7
2.7 Approved maneuver ......................................................................................2 - 7
2.8 Maneuvering load factor ...............................................................................2 - 7
2.9 Flight crew......................................................................................................2 - 7
2.10 Kind of operation........................................................................................2 - 8
2.11 Minimum equipment....................................................................................2 - 8
2.12 Aero tow, winch and auto tow launching.....................................................2 - 9
2.13 Other limitation ...........................................................................................2 - 9
2.13.1 Cro wind ...........................................................................................2 - 9
2.13.2 Water balla t......................................................................................2 - 10
2.14 Limitation placard .....................................................................................2 - 10
I ue 1 Date: 24 May 2019 Page 2-1
Rev. 0 Appr.

AK-17B FES mini Flight Manual
2.1 Introd ction
Chapter 2 include operation limitation , in trument marking and placard
nece ary for afe operation of the AK-17B FES mini powered ailplane, it
motor, tandard y tem and tandard equipment.
The limitation have been approved. Compliance with the e limitation i
mandatory.
2.2 Airspeed
Air peed limitation and their operational ignificance are hown in Table 2.2-1.
313
Speed IAS [km/h / (kt )] Remark
13.5 m
VNE Never exceed peed Do not exceed thi peed
in any operation and do
not u e more than 1/3 of
control deflection at:
230 / (124)
220 / (119)
210 / (113)
195 / (105)
170 / (92)
0 – 4000 m (0 – 13100 ft)
up to 5000 m (16400 ft)
up to 6000 m (19680 ft)
up to 8000 m (26250 ft)
up to 10000 m (32800 ft)
VPE
Maximum operation
with engine running 160 / (86)
Do not exceed thi peed
with the engine running
(at any power etting)
VRA Rough air peed 170 / (92)
Do not exceed thi peed
except in mooth air and
then only with caution.
Rough air i in lee wave
rotor, thundercloud , etc.
I ue 1 Date: 24 May 2019 Page 2-2
Rev. 0 Appr.

AK-17B FES mini Flight Manual
Speed IAS [km/h / (kt )] Remark
13.5 m
VAManeuvering peed 170 (92)
Do not make full or abrupt
control movement above
thi peed, becau e under
certain condition the
ailplane may be over
tre ed by full control
movement
VFE Maximum flap
extended peed.
Flap etting:
Do not exceed the e
peed with the given flap
etting
-1 up to 0
+1 up to L
230 / (124)
170 / (92)
VWMaximum winch
and auto-tow launch
peed
140 / (76)
Do not exceed thi peed
during winch or auto-tow-
launching
VTMaximum aero
towing peed 160 / (86) Do not exceed thi peed during aero towing
VLO Maximum landing
gear operation
peed
170 / (92)
Do not extend or retract
the landing gear above thi
peed
VPO min Minimum peed to
tart motor in flight 80* / (43*) Do not tart the motor below thi peed
VPO max Maximum peed to
tart motor in flight 160 / (86) Do not tart the motor above thi peed
Warning At higher altitude the true air peed i higher than the indicated
air peed and VNE i reduced with altitude.
I ue 1 Date: 24 May 2019 Page 2-3
Rev. 0 Appr.

AK-17B FES mini Flight Manual
*Warning
Select your engine tart/ top peed in flight correctly:
•flap mu t be at +2 po ition;
•make ure your elected peed for motor tart / top i at
lea t 8...10 km/h (4...5 kt ) higher than tall peed for your
configuration.
2.3 Airspeed indicator markings
Air peed indicator marking and their color code ignificance are hown in Table
2.3-1.
314
Marking IAS value or range
[km/h / (kt )] Significance
White arc 95...170 / (51...92)
Po itive Flap Operating Range:
lower limit i 1.1 VSO in landing
configuration at maximum weight.
Upper limit i maximum peed
permi ible with flap extended
po itive.
Green arc 100...170 / (54...92)
Normal Operating Range: lower limit
i 1.1 VS1 at maximum weight and
mo t forward C.G. with flap neutral.
Upper limit i rough air peed.
Yellow arc 170...230 / (92...124) Maneuver mu t be conducted with
caution and only in mooth air.
Red line 230 / (124) Maximum peed for all operation
Blue line 95 / (51) Speed for be t climb Vy , flap in
po ition “+2”
Yellow triangle 95 / (51)
Approach peed at maximum weight
without water balla t and with
removed motor and FES batterie
I ue 1 Date: 24 May 2019 Page 2-4
Rev. 0 Appr.