Flugzeugbau LS1-f Flight Manual Download

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Flight Manual LS1-f

Issued May 2011

7.1

Sailplane and systems description

7.1

Introduction

Section 7 describes the operation of the sailplane including its systems.
M.M. = Maintenance manual
Refer to section 9 "Supplements" for details of optional systems and
equipment.

7.2

Airframe

The LS1-f is a single-seater high performance glider with 15 m wingspan.

Construction:

Wings

GFRP-foam-sandwich-shell

Wing spars

Double T-spar, GFRP-roving spar caps,
GFRP-foam-sandwich shear web

Ailerons

GFRP-shell

Rudder

GFRP-shell

Horizontal stabilizer

GFRP-foam sandwich-shell without spar

Elevator

GFRP -shell

Fuselage

GFRP-shell with GFRP bulkheads

Tailplane:

T-Tail with conventional stabilizer-elevator and spring trim.

Colours:

All parts exposed to sunlight except for registration marks and

anti-collision paint must be white.

7.3

Placards

Airspeed indicator markings see section 2.3.
Data placard, Checklist and limitation placards see section 2.16

at the master switch

OFF

at the waterballast handle

Further placards see next page.

Summary of Contents for LS1-f

Page 1: ...authority The new or amended text in the revised page will be indicated by a black vertical line in the right hand margin and the Revision No and the date will be shown on the bottom left hand of the...

Page 2: ...Flight Manual LS1 f Issued May 2011 0 2 Copyright DG Flugzeugbau GmbH any copy or publishing prohibited Page intentionally left blank...

Page 3: ...ublishing prohibited 0 2 List of effective pages Section page issued replaced replaced replaced 0 0 1 May 11 0 2 0 3 0 4 0 5 0 6 0 7 1 1 1 May 11 1 2 1 3 1 4 2 2 1 May 11 2 2 2 3 2 4 2 5 2 6 2 7 2 8 2...

Page 4: ...gbau GmbH any copy or publishing prohibited List of effective pages cont Section page issued replaced replaced replaced 4 4 12 May 11 4 13 4 14 5 5 1 May 11 5 2 5 3 6 6 1 May 11 6 2 6 3 6 4 6 5 7 7 1...

Page 5: ...3 2 3 1 LS1 f 2 3 2 3 2 LS1 f 45 2 3 2 4 Mass weight 2 4 2 5 Centre of gravity 2 4 2 6 Approved manoeuvres 2 4 2 7 Flight crew 2 5 2 8 Kinds of operation 2 5 2 9 Minimum equipment 2 5 2 9 1 Normal op...

Page 6: ...5 4 3 1 Inspection prior to rigging 4 5 4 3 2 Inspection after rigging Walk around the aircraft 4 6 4 3 3 Daily inspection after flight operaton 4 8 4 3 4 Pre flight inspection 4 8 4 4 Normal procedu...

Page 7: ...trol 7 2 7 7 Wheel brake 7 3 7 8 Airbrakes 7 3 7 9 Waterballast System 7 3 7 10 Cockpit 7 3 7 11 Canopy 7 3 7 12 Tow hooks 7 3 7 13 Rudder pedal adjustment 7 4 7 14 Seat back rest and safety harness 7...

Page 8: ...y the glider manufacturer 1 2 Certification basis This type of sailplane has been approved by the Luftfahrt Bundesamt LBA in accordance with Airworthiness requirements Airworthiness requirements forSa...

Page 9: ...nitial manual 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 im...

Page 10: ...Retractable main wheel spring mounted Wheel with drum brake actuated via the airbrake handle Waterballast in the wings in waterbags Technical data units LS1 f LS1 f 45 Wing span m 15 Wing surface m2...

Page 11: ...Flight Manual LS1 f Issued May 2011 1 4 Copyright DG Flugzeugbau GmbH any copy or publishing prohibited 1 5 Three view drawing...

Page 12: ...g prohibited 2 Limitations 2 1 Introduction Section 2 includes operating limitations instrument markings and basic placards necessary for safe operation of the gliders LS1 f and LS1 f 45 its standard...

Page 13: ...eed 170 92 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 launching speed 130...

Page 14: ...1 at most forward c g with flaps neutral Upper limit is rough air speed Yellow Arc 170 250 92 135 Manoeuvres must be con ducted with caution and only in smooth air Red Line 250 135 Maximum speed for a...

Page 15: ...s 230 kg 507 lbs Maximum mass in baggage compartment 12 kg 26 5 lbs Caution Heavy pieces of baggage must be secured to the baggage compartment floor Maximum waterballast Variant mass kg litres mass US...

Page 16: ...are not permitted Cloud flying daylight permitted when properly instrumented see below 2 9 Minimum equipment As minimum equipment only the instruments and equipment specified in the equipment list se...

Page 17: ...ch and autotow VW 130 km h 70 kts 2 10 4 Min towing speeds for aerotow LS1 f and LS1 f 45 No waterballast 100 km h 54 kts LS1 f With waterballast 110 km h 59 kts LS1 f 45 With waterballast 120 km h 65...

Page 18: ...m which enables determination of the exact amount of ballast filled e g water gauge or calibrated canisters Only symmetrical loading is allowed After filling balance the wings by dumping enough water...

Page 19: ...son at the control surfaces 11 Tail dolly removed 12 Tow release checked 13 Canopy locked Clearly visible at right cockpit wall Type LS1 f Serial No ____________ Registration __________ Airspeed limit...

Page 20: ...il dolly removed 12 Tow release checked 13 Canopy locked Clearly visible at right cockpit wall Type LS1 f 45 Serial No ____________ Registration __________ Airspeed limits Winch launch and auto tow 13...

Page 21: ...ishing prohibited 2 13 3 LS1 f and LS1 f 45 Min Cockpit Load kg If not 60 kg clearly visible at instrument panel Tyre pressure 3 0 3 5 bar 43 5 51 psi On right landing gear door Baggage load Max 12 kg...

Page 22: ...in case the canopy doesn t separate by itself from the fuselage you have to push the canopy upwards with both hands on the Plexiglas The latch on the rear of the canopy is held back by a spring in the...

Page 23: ...ugh speed reserve especially in gusty conditions and in the landing pattern Intentional spinning is prohibited Recover immediately from an unintentional spin 3 6 Recovery from unintentional cloud flyi...

Page 24: ...cedures On downwind leg of the landing pattern Extend the landing gear unlock the parachute harness not the seat harness Touch down With landing gear extended and airspeed as low as possible At point...

Page 25: ...helper on the wingtip push right wing into place care for correct dihedral 6 Sight through the wing main pin bushings to determine alignment Push the main pins in as far as possible 7 Secure the main...

Page 26: ...TN56 executed Using the securing sleeve 1 hook up is only possible with the slot of the sleeve facing down After proper connection and turning the sleeve 180 the quick connector is secured see sketch...

Page 27: ...erwise they may be hard to open again because they tend to lock with water Warning Never fill the wing tanks from a main pressure water supply Filling the wing tanks with excessive pressure more than...

Page 28: ...ted 4 2 5 Derigging Derigging follows the reverse of rigging see section 4 2 1 Waterballast must be dumped first Caution Lift wings far enough that you can turn the main pins The resulting dihedral sh...

Page 29: ...a Check for cracks delamination etc b Check the lift pins and their glued connection in root ribs and the bushes in the spar ends for wear c Check the balls of the control quick connectors at the root...

Page 30: ...nnected i Check all fuses incl the fuse at the battery 3 Function check of the control quick connectors of ailerons and airbrakes After the positive control check try to turn and move the connectors i...

Page 31: ...r and the corresponding cut out in the skid plate must be at the front end b Check if drain hole in front of tail skid are open 8 Rear end of the fuselage a Check the lower rudder hinge and the connec...

Page 32: ...y 4 3 4 Pre flight inspection 1 Trim ballast for under weight pilot 2 Loading plan regarded 3 Parachute worn properly static line connected 4 Seat back and rudder pedals in comfortable position 5 Safe...

Page 33: ...ndication may be lower than real during aerotow depending on cable ring position 4 4 2 Winch launch Winch launch is only allowed at the C G tow hook Set trim to nose down for a winch launch Use the no...

Page 34: ...and with sufficient rudder opposite to direction of turn Loss of height is approx 40m 130ft For stall airspeeds see section 5 2 Caution With empty water tanks leave dump valve open to avoid pressure p...

Page 35: ...aircraft may drop during flare out When flaring out keep the airbrake setting you were using opening them further may drop the sailplane Note When the C G is in a forward position and airbrakes are e...

Page 36: ...eeze behind the valve and thus you can dump only a part of the ballast Frozen water along the aft fuselage boom may shift the C G behind the rear limit Water ballast raises the approach speed so it is...

Page 37: ...1 At temperatures below 20 C 4 F there is the risk of cracking the gelcoat 2 Attention must be paid to the fact that at higher altitudes the true airspeed is greater than the indicated airspeed The ma...

Page 38: ...te structure may be damaged or destroyed The sailplane is not equipped with a lightning protection system 4 4 8 Cloud flying Cloud flying is only permitted without waterballast Take care to fly smooth...

Page 39: ...ited 50 70 90 110 130 150 170 190 210 230 250 50 70 90 110 130 150 170 190 210 230 250 CAS km h IAS km h 5 Performance 5 1 Airspeed indicator system calibration IAS indicated airspeed CAS calibrated a...

Page 40: ...allast Airbrakes extended 80 75 km h 43 40 kts without waterballast 95 90 km h 51 49 kts with waterballast 5 3 Demonstrated crosswing performance The demonstrated crosswind velocity is 15 km h 8 kts a...

Page 41: ...Flight Manual LS1 f Issued May 2011 5 3 Copyright DG Flugzeugbau GmbH any copy or publishing prohibited 5 5 Flight polar 1 m s 1 kts 197 t min 1 kts 1 852 km h...

Page 42: ...hanged this data is to be entered in the cockpit placard as well 6 4 Basic empty mass and C G Actual data see section 6 8 4 With the empty weight C G and the cockpit loads within the limits of the tab...

Page 43: ...ax 12 kg 26 5 lbs Heavy pieces of baggage must be secured to the baggage compartment floor The added load in the fuselage must not exceed the max payload without waterballast W B see weighing report s...

Page 44: ...ighing report for section 6 3 Distances in mm masses in kg 25 4 mm 1 inch 1 kg 2 2046 lbs Date of weighing Executed by Date of equipment list Empty mass Empty mass C G Max mass without W B Max payload...

Page 45: ...69 164 159 154 149 144 139 134 129 65 174 169 164 159 154 149 144 139 134 129 124 70 169 164 159 154 149 144 139 134 129 124 119 75 164 159 154 149 144 139 134 129 124 119 114 80 159 154 149 144 139 1...

Page 46: ...0 141 139 137 135 133 131 129 127 125 123 75 136 134 132 130 128 126 124 122 120 118 80 131 129 127 125 123 121 119 117 115 113 85 126 124 122 120 118 116 114 112 110 108 90 1210 119 117 115 113 111 1...

Page 47: ...foam sandwich shell Wing spars Double T spar GFRP roving spar caps GFRP foam sandwich shear web Ailerons GFRP shell Rudder GFRP shell Horizontal stabilizer GFRP foam sandwich shell without spar Elevat...

Page 48: ...lier connectors with additional securing device according to section 4 2 2 and L Hotellier balls at wingside pushrods Ailerons partly mass balanced 7 5 Elevator control trim Conventional tailplane ele...

Page 49: ...198 lbs 17 6 US gal Dump valve on landing gear box Dumping is via the landing gear box 7 10 Cockpit Fiberglass shell Controls for landing gear black trim green and divebrakes blue are located on the...

Page 50: ...ptionally fixed according to TM29 Up to 8 instruments plus radio may be installed Max mass installed in the upper part 4 kg 8 8 lbs 7 16 Baggage compartment Max load 12 kg 26 5 lbs Heavy pieces of bag...

Page 51: ...e spring at the hinge by about 30 mm 1 2 in b After pulling the emergency canopy release handle the pilot pushes the canopy up at the rear to disengage the LS Latch R ger hook from the spring on the f...

Page 52: ...and hinges should be cleaned and greased See the lubrication schedule of the maintenance manual section 3 4 Each year the control surface displacements adjustments and general condition must be check...

Page 53: ...spar as close to wing rootrib as possible or a rootrib wing cradle 2 A wing cradle at the taper change Horizontal tailplane Cradles as desired Fuselage 1 A felt lined fibreglass nose cap which does no...

Page 54: ...As soon as the wax coat is damaged or worn a new coat has to be applied see maintenance manual sect 3 1 If you often leave your aircraft outside this may be necessary every half year 8 7 1 Hints for c...

Page 55: ...t and small scratches can be removed by use of the Schwabbel procedure see maintenance manual sect 3 1 8 7 3 Metal parts Pins and bushes for rigging the aircraft are not surface protected and must be...

Page 56: ...Flight Manual LS1 f Issued May 2011 9 1 Copyright DG Flugzeugbau GmbH any copy or publishing prohibited 9 Supplements Section not effective...

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