Grob TWIN-ASTIR Flight Handbook

GROB

N8485W

3250

Utah Soaring Association

GROB-FLUGZEUGBAU

8939

Mattsfes

Flugplatz Mlndelhelm-Mattsies

Telefon

FLIGHT HANDBOOK

08268/411

-,-

Registration:

Owner:

German edition of LuftGerPO.

""-'

This handbook must

I

IV

Jt

refers

of

operating instructions are approved under § 12/2.

-

1-~J:::':I}

be

carried on board

to

the TWIN ASTIR Sailplane

• ,

Factory

Serial Number:

I

at

atl times.

11?

Published

Approval of translation has been done by beat knowledge and judgement - In any case the

original text In German language Is authoritative.

·

GROB

GRO~-FLUGZEUGBAU

8939 Matts!es

FJugplatz Mindelheim-Mattsies

Terefon

08268/411

FLI"GHT

-.--~I

ThJs

handbook must be carried on board

lt refers

Registration:

Owner:

HANDBOOK

I'J

to

- I I

TRAINER

the TWIN-ASTIR

.!*S·

TRAINER

Factory

•

at

Sailplane

Serial

I

all times.

Number:

..........

<~1

German edition of

LuftGerPO.

Pub

fished

Approval of translation has been done original

text

In

of

operating instructions are approved under § 12/2.

German languag& Is authoritative.

by

beat knowledge and judgement - In any caea the

FLIGHT HANDBOOK

Updates

TW~N

ASTIR

1

Current number

1

2 17

\

3

4

5

6 1, 28

7

Page

Sa

18

25

25a

1,25,25a

Reference Date

TWIN ASTIR TRAINER 1.4.78·

New

Control

New

Control

Check

Fittings

Service Butletin

315-50

TM 315-58

Levers

Levers 1.10.78

of

wing

1.10.78

28.09.92

04.11.96

Signature

LBA-

Approval

1,

7,

1, 7,

1"1

11

8

9

14 September 2004

As

·a 315-64

Envelope

MSB 315-64/3

Revised

Operation

Limitations

Limits

of

30.06.2003

14.09.2004

-

~

/

t(_~

/.~~

~

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t-

..-

·

1

2.

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DKr.

2aa~

FLIGHT

Contents

HANDBOOK

TWIN

ASTIR

2

I.

1

•.

I.

11.

ll. 1 Airworthiness Group

11.

General

1

Updates

2 Contents 2 3 Photograph 4 4 Drawing 5 5 Description 6

Operating limits

2 Permitted operating conditions

Minimum equipment

3

Maximum Speeds

4

Flight envelope

5

Weight limits

6

Centre of gravity position

7

Load scheme

8

Tow hooks

9

Weak link strength

10

Tire pressure

11

Cros:swlnds

12

Required placards

13

Symbols

14

1

6 6 6

7 7

8

10

10 10

10

11

13

Ill.

1

Ill.

Ill. 2 Ill. 3 Ill. 4

Ill. 5

Emergency procedures

Exit from a spin

Emergency canopy jettisoning and exit

Landing with a retracted undercarriage

Others (Rain, ice, stall, groundloops}

Instruments specifications

15 15 15

15

16

FLIGHT

IV

. Normal operation

HANDBOOK

TWIN

ASTIR

3

IV.

IV·

IV.

IV. 5 Free Flight

IV. 6

IV.

IV

..

IV.

IV. 10 Approach and landing

IV.

V. V.

V.

Cockpit and controls (Picture) 17

1

2 Daily preflight inspection 19

3 Control checks before

4 Take

Slow High speed flight

7

Cloud flying

8

Simpre Aerobatics

9

11

off

flying and stalls 22

Flying with waterballast

Rigging and derigging

take

off

1 Rigging, derigging

Storage

2

3 Transport

4 · Maintenance

of

the

glider

21

22

22 22 23

24

25

26

27

VI.

1

VI.

2

VI.

3 ·_Reference 4 - Reference

Vl.

5

VI.

Appendices

Flight performance

Service and Maintenance instructions

to

repairs

to

release hooks

Determination

of

the

center

of

gravity

29

30

31

FLIGHT

HANDBOOK

TWIN

ASTIR

5

I

'

FLIGHT

HANDBOOK

TWIN

ASTIR

5a

The sailplane TWIN-ASTIR TRAINER is derived from the TWIN-ASTIR. The differences are fixed sprung undercarriage with disc brake, and the deletion of the wing ballast tanks.

Therefore, the remarks

In the flight handbook and the maintenance handbook concerning retractable undercarriage and water tanks do not apply to the TWIN-ASTIR

The wheel brake

of

the TWIN-ASTIR TRAINER is a disc brake. The

brake cylinder with the storage tank for brake fluid Is mounted

TRAINER.

on

the

undercarriage box. The marks for minimum and maximum reserve must be observed.

For refilling use brake fluid DOT 3 (amber).

1.

10.78

FLIGHT

I.

5

Description

HANDBOOK

TWIN

ASTIR

6

The TWIN

ASTIR

Is a high performance two seater sailplane with a

T-tail, fitted with a retractable undercarriage, upper surface airbrakes

and water This

sailplane is manufactured using the latest techniques in industrial

ballast tanks in the wings.

Glass fibre construction.

it is designed

for

training, high performance and simple aerobatic

flying.

Technical

Span 17.5 m (57.4 ft.)

Length Height 1.6 m

Aspect

Ratio

11.

Operating

11.

1

(U,

Utility, LFSM}

The

segler) published 23. the licensing of a new type of glider

Data:

8.1

m (26.6 ft.)

17.1

Limits

Airworthiness

LFSM

(Lufttuchtigkeitsforderung fUr Segelflugzeuge und Motor-

(5

.2

ft

Group

10.

.)

1975

Wing Area 17.8 Maximum Flying Weight

m•

(191.6ft.

650

kg

2

(14351bs)

Maximum Wing Loading 36.5 kg/m

(7.841bs/ft.

are the basic rules and requirements

or

motor glider in Germany.

}

1

2

for

)

11.

2

Permitted

operating

conditions.

The plane is licensed for:

1· Flight in

VMC

2. Simple Aerobatics (Loops, Stall turns, Lazy eight, Chandelle and

SpiA).

3. Cloud flying {When fitted with suitable Instrumentation as defined

in section

11. 3 Minimum

1. 2 Air speed Indicators reading

2.

2 Altimeters.

3. Full Harness

4. Parachute

5.

Loading limit plaque in front and back cockpit.

6.

Flight Limits plaque.

7.

Flight Handbook.

11. 3).

equipment

to

300 km/hr (162 kts, 187 mph)

Straps in front and back cockpit.

or

back cushion at least 7

cm

(3

inch) thick.

FLIGHT

HANDBOOK

TW-IN

ASTIR

Cloud Flying.

For

cloud

flying

the

additional instruments listed below must be

installed. ·

1.

Variometer.

2.

Electric turn and

3. Magnetic

Compass (Compensated inside

slip

indicator.

the

7

glider).

11. 4 Maximum

Maximum permitted

speed

in

calm

-Speeds

air

• ·

VNE

=

250

km/h ( 135 kts, 155 mph} I

Maximum permitted

speed in

Maximum Manoeuvring speed

rough

air

Maximum winch launch speed Maximum Aerotow speed

Conditions· in rough

air

are similar

Vs

VM = 170 km/h ( 92 kts,

Vw

VT

= 170 km/h ( 92-kts, 105 mph)

= 120

= 170 km/h (

to

km/h

( 65 kts, 74 mph)

92

those encountered in rotors,

cJouds, whirlwinds and when overflying mountain ranges.

Manoeuvring speed tions should

Air

105-155 mph

may

be restricted

speed

51-105

be

used.

indicator

mph

=

==

at 155 mph = 135 kts =

at

65

m

ph

= 55

Position

The

Pitot head

Errors

airspeed

in

indicator

the

is

the maximum · speed at whi

At

maximum speed (VNE) the control deflections

to

1/3

of

the full range .

markings

44-

92-135

tail

kts

fin.

92

kts = kts =

= 102

must

static

82-170

170

-----

250

km/h

km

/h - Yellow

(recommended minimum appr. speed}

be

connected

vents

side

ch

full

km/h

250km

/h

-Green

-Yellow

(MSB315-64/3}--

to

the foUowing sources:

of

the fuselage between the

Red line

two seats.

Using a

or 1 kt

cal-ibrated

or

1.2 mph. A

ASI

the

calibration

posaion

curve

error

is

not

greater

is

therefore not necessary.

1-05

mph)

kts, _105 mph)

control deflec-

arc

arc I

triangle

than ± 2 km/h

If

. 5 Flight envelope.

The sailplane design

At

manoeuvring speed + 5.3 -

At

VNE + 4.0 - 1.5

(Brakes

14. September 2004

closed

and

limit load factors are as follows:

calm

air}

2.65

FLIGHT

11.

6 Welghtllmlts

HANDBOOK

TWIN

ASTIR

8

Maximum permitted weight without water ballast Including water ballast .

Maximum permitted weight of non

11.

7 Centre

of

gravity position

lifting parts •

650 650

470

kg

(1435 lbs)

kg

{1435 lbs)

kg

(1036

lbs)

The approved range of centre of gravity positions during flight is

260

mm

{10.24 inches) to 460 inm (18.11 inches) behind the reference

to

point, equivalent

24.7%

to

43.6%

of

the

M.A.C.

of the wing.

The reference point is the front edge of the wing at the wing root. The approved centre of gravity range does not get exceeded by the

11.

payload distribution specified in the loading plan The exact position of the centre

VI·

calculated according to

5.

of

gravity at flying weight can be

8.

11.

8 Load scheme TWIN ASTIR

70

kg

Minimum load in the front seat for all flight . Maximum load in the front seat Maximum load in the back seat Maximum load ln both seats Maximum load in the baggage compartment .

110 110

220

10

(154 lbs)

kg

(242 lbs)

kg

{242 lbs)

kg

(485 lbs)

kg

( 22 lbs)

Ballast must be used on the front seat to compensate If the front seat load is lower than

The maximum flying weight

70 kg (154 lbs).

of

650 kg {1435 lbs) must not be exceeded.

Waterballast may only be taken on until the maximum flying weight

is reached.

lf

Water ballast can not be used to compensate

seat

Is

too low·

the load in the front

F

LIG

H T

HANDBOOK

TWI

N

ASTIR

9

Date

of

wetghlng: list

carried out

by.

~.

-

Equipment

for weighing

...

used

(dale)

---

--

Empty

(Weight

kg!lb9

Position

cg

empty

} behind

rence

mm/ inches

of

refe-

Maximum

r--

total

payload

kg/lbs

·

-

1--

-

--

----

"-

-

,-

...

~

._.....,_

--

-·

-·-

Grob TWIN-ASTIR Flight Handbook

Specifications and Main Features

Frequently Asked Questions

User Manual