Manual for the emergency bail out aid NOAH - LBS scheme Discus/Ventus ... (see flight manual section...

SCHEMPP - HIRTH Flugzeugbau GmbH Krebenstraße 25 73230 Kirchheim/Teck Deutschland Telephon (+49) .7021 / 7298-0 Telefax (+49) .7021 / 7298–199 E-Mail: [email protected]

Manual for the emergency bail out aid NOAH

for Schempp-Hirth single seater

NOAH Designed by Thomas Matuschak and DG-Flugzeugbau, Bruchsal

Issue: October 2006

LTB Güntert & Kohlmetz GmbH Industriestr. 40 76646 Bruchsal

Manual for the emergency bail out aid NOAH for Schempp-Hirth single seater

Issue: April 2008

0 Record of revisions Any revision of the present manual must be recorded in the following table. 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. Rev.No.

Affected Pages

Description Date Issue

1 3,11,19 Procedure for filling the airbag for inspection purpose, manual revision

November 2007

2 3, 13, 18, 19, 20

Correction safety wire, variant for the attachment of the pressurised gas cylinder valve, enclosure 1 supplemented (NOAH refilling instructions)

April 2008



Issue: April 2008

1 Content 0 Record of revisions .....................................................................................................2

1 Content .......................................................................................................................3

2 Description of the NOAH-system ................................................................................4

3 Operating instructions NOAH......................................................................................5 3.1 Pre-flight inspection ...........................................................................................5 3.2 Use of NOAH in case of an emergency bail out ................................................6

4 Maintenance instructions ............................................................................................7 4.1 Annual inspection and service ...........................................................................7 4.2 Maintenance every ten years.............................................................................9 4.3 Installation of the NOAH system........................................................................9 4.4 Installation and removal of the pressurised gas cylinder for inspection ...........10 4.5 Removal of the high pressure hose from the airbag ........................................11 4.6 Filling the airbag for inspection purpose ..........................................................11 4.7 Folding and attaching the airbag......................................................................11 4.8 Replacement of Bowden cables ......................................................................11 4.9 Seat harness buckle ........................................................................................12 4.10 Life time of the NOAH components / spare part list ......................................12 4.11 Sending in for maintenance ..........................................................................12 4.11 Sending in for maintenance (continued) .......................................................13

5 List of tools................................................................................................................13

6 Materials for maintenance.........................................................................................13

7 Pictures/Drawings .....................................................................................................14 Actuation handle with ground securing .....................................................................14 Installation scheme Discus/Ventus............................................................................15 Installation scheme Discus-2/Ventus-2 .....................................................................16 Folding the airbag (drawing ZRB 507) ......................................................................16 Folding the airbag (drawing ZRB 507) ......................................................................17 Pressurised gas cylinder with tap cock valve and safety devices (drawing Z108a)...18 Pressurised gas cylinder with tap cock valve and safety devices – variant (drawing Z108b).......................................................................................................................19

8 Appendix ...................................................................................................................20 8.1 List for annual weight measurement ................................................................20

9 Enclosures Enclosure 1: NOAH refilling instructions (issue April 2008)



Issue: October 2006

2 Description of the NOAH-system NOAH is a system to facilitate the bail out of the cockpit in an emergency and originally has been designed by Thomas Matuschak and DG-Flugzeugbau GmbH. NOAH is a supplementation to the parachute. NOAH features an airbag similar to a car airbag. The gas which is necessary to inflate the bag is stored in a pressurised gas cylinder. The actuation is by mechanical means via the yellow-black marked NOAH handle at the right hand canopy frame. On the canopy frame close to the NOAH handle a tag labelled „NOAH Airbag“ can be found. To avoid inadvertent activation of the system on the ground the NOAH handle is secured by a spring cotter. The spring cotter must be removed before flight and must be installed best after the landing, latest at the end of daily flight operation. To actuate NOAH the canopy must be opened or jettisoned first. When the canopy is closed it is not possible to activate NOAH because the handle is blocked by a plate attached to the canopy frame. If the NOAH system is activated by pulling the NOAH handle the Bowden cables will first open the seat harness buckle and then the valve of the pressurised gas cylinder. The pilot will be lifted by the airbag so that he can roll himself out of the cockpit. If NOAH is used together with an automatic parachute, the emergency bail out procedure will be more or less automatic after operation of the NOAH handle. Note: There is a small hole in the NOAH airbag at the front end. In case of inadvertent inflation of the airbag gas can stream out of this hole. This is to prevent injuries to the pilot if the seat harness buckle is not open.

Technical data Mass of all parts approx. 4,5 kg (9.9 lb) Generation of pressure: nitrogen approx. 200 bar Filling time approx. 2 seconds Design range pilot mass 110 kg (242.8 lb) up to 4 g

General design see section 7.



Issue: October 2006

3 Operating instructions NOAH 3.1 Pre-flight inspection Check the airbag, the high pressure hose and the operating cables for correct positioning and for any wear. Check especially if the nipple of the cable which opens the seat harness buckle is positioned in direction of flight in front of of the cam of the actuation unit slide - see sketch:

The cam itself must be located fully back in the actuation unit. The colour markings at the cam and at the fixed part of the actuation unit should match (see picture).

direction of flight

nipple towards seat harness buckle cam

detail of the actuation unit (at the right hand side cockpit wall in the leg room)

colour markings

colour markings

slide cam



Issue: October 2006

3.2 Use of NOAH in case of an emergency bail out Note: We strongly recommend the use of an automatic parachute. Only with an automatic parachute will the bail out procedure be nearly automatic and precious time and altitude can be saved. Emergency bail out with NOAH:

1. For the bail out jettison the canopy first (see flight manual section 3.3) Warning: If there are loops at the rudder pedals make sure that your feet are out of the loops first.

2. Then pull the yellow-black marked NOAH handle at the right hand side canopy frame strongly and quickly up to its stop.

3. When the airbag is filled tuck up your legs a little and roll out of the cockpit to the side. If the canopy has not been jettisoned completely from the fuselage roll out to the left hand side.

Caution: Don’t operate the NOAH handle on the ground with open canopy as you may release NOAH. Then among other things the pressurised gas cylinder must be filled again (see section 4.10). Note: For normal opening of the seat harness buckle rotate the buckle only in clockwise direction.



Issue: October 2006

4 Maintenance instructions 4.1 Annual inspection and service The inspection can be done preferably together with the annual check. I.) Check if the pressurised gas cylinder is full: To accomplish this remove the cylinder

from the glider (see section 4.4) and weigh the cylinder without transport securing device. Compare the weight with the data on the placard on the cylinder. The balance must measure with a precision of 1g. If the weight is more than 5g lower than the data on the placard the cylinder must be sent in for refilling. Enter weight, date and inspection signature into the placard.

II.) Check if the safety wire (item F on sketch in section 4.4) is damaged. If the wire is damaged, the cylinder must be sent in for maintenance.

III.) Visually check all parts assembled to the pressurised gas cylinder.

IV.) Visually check the airbag and the high pressure hose for any wear. Remove the cover of the airbag for this check.

V.) Check the airbag for tightness see section 4.6.

VI.) Visually check all Bowden cables and the actuation unit for any wear and for corrosion.

VII.) Function check of the actuation unit with pressurised gas cylinder still removed: Disassemble the cover from the actuation unit. Then pull out the NOAH handle slowly and check the following items:

a) The seat harness buckle must fully release the seat harness approx. 10mm 0,394inch) before the nipple of the Bowden-cable (running to the buckle) is inserted in the groove of the actuation unit (see sketch).

nipple inserted

position of the nipple, harness fully disengaged


direction of flight

towards the seat harness buckle

10mm



Issue: October 2006

b) The nipple of the Bowden cable must be inserted in the groove of the actuation unit

before the seat harness buckle comes to its stop. The cable which runs to the pressurised gas cylinder must not be tightened but must have approx. 10mm (0,394inch) freeplay (clevis pin in the slotted hole of the actuation unit). c) Move the cam of the actuation unit back to its initial position and release the nipple

from the inserted position. The seat harness buckle then must move back or must be turned back to its locked position. Make sure that the nipple of the Bowden cable for the seat harness buckle is positioned in direction of flight in front of the cam, see sketch.

VIII.) Maintenance: All parts are maintenance free and it is not allowed to oil or grease any

part.

IX.) Assembly is in reverse order to removal. Fold the airbag according to section 4.7.

direction of flight

nipple towards seat harness buckle cam


cam

10mm

direction of flight nipple just inserted towards seat harness buckle

towards pressurised gas cylinder

clevis pin towards NOAH handle


slide



Issue: October 2006

4.2 Maintenance every ten years I.) After10 years the NOAH airbag and the high pressure hose have reached their

lifetime. The pressurised gas cylinder must be inspected by a technical organisation approved for such inspections. As the pressurised gas cylinder must be emptied for this inspection you should use this opportunity for a complete test of your NOAH system.

II.) Test: Remove the canopy from the fuselage and buckle your seat harness. Pull the NOAH operating handle strongly and quickly up to its stop. After the seat harness has opened the airbag should blow up in approx. 2 seconds.

III.) Remove the gas from the airbag. To do so pull off the high pressure hose from the airbag.

IV.) Remove the pressurised gas cylinder (see section 4.4) and send in for inspection and refilling (see section 4.11).

V.) When you get the cylinder back install it together with the new airbag and high pressure hose. Execute according to items II.) and IV.) - IX.) of the annual inspection (see section 4.1). Enter the new parts in the record of lifed components of your glider.

4.3 Installation of the NOAH system Install the system according to the installation instructions which belong to the technical note concerning the installation of the NOAH system into your glider type. Enter the NOAH airbag, the high pressure hose and the pressurised gas cylinder into the record of lifed components of your glider.



Issue: October 2006

4.4 Installation and removal of the pressurised gas cylinder for inspection The installation (and analogous in reversed order the removal) of the mountings and covers is accomplished according to the working instructions, which are supplied together with the technical note for the installation of the NOAH-system for each type of aircraft. For the installation/removal of the pressurised gas cylinder proceed as follows:

I.) Insert the transport securing device A into the hole (split pin 4x28 DIN 94 St).

II.) Remove the Bowden cable from the operating disc. Therefore remove the split pin B

(split pin 2x20 DIN 94 St) so that the nipple C can be taken out of the operating disc. Then unfasten nut D and take out the adjustment screw E.

III.) Remove the high pressure hose from the pressurised gas cylinder. Therefore unfasten the cap nut G at the hose (two 22mm open end spanners are needed).

IV.) Open the hose clamp(s) which hold the cylinder (7mm socket wrench) and pull out the cylinder.

V.) Assembly is the reverse of removal. Use new split pin B. Remove the transport securing device A when the system is completely installed.



Issued: November 2007

4.5 Removal of the high pressure hose from the airbag Pull out the U-shaped wire clip using universal pliers. Pull off the fitting from the airbag. Do not omit large plastic washer ZRB 506 on reassembly! 4.6 Filling the airbag for inspection purpose Close the small hole (in the front of the airbag) with tape. Fill the airbag via the high pressure hose. This must be done with a pressure air system which is equipped with a pressure reducer, a control valve and with a manometer (measuring range 0-0.5 bar (0-7.25 psi)). To check the airbag for tightness proceed as follows: Fill the airbag slowly, press onto the small hole with your finger in addition to the tape. Fill the airbag up to a pressure of 0.25 bar (3.63 psi). Due to the design of the airbag some air may stream out of the airbag. Then close the control valve to completely separate the airbag from the pressure air system. No more compressed air may enter the airbag. After 30 seconds the amount of air which escaped from the airbag should not be sufficient to noticeably change the shape of the inflated bag. After inspection remove the tape from the hole. 4.7 Folding and attaching the airbag Fix the airbag with Velcro strips to the seat shell. Then fold the airbag according to drawing ZRB 507 (see section 7) and fix the cover with Velcro strips. 4.8 Replacement of Bowden cables When replacing Bowden cables be sure to adjust the cables so that the correct sequence of all functions is ensured according to section 4.1 point VII.).



Issued: October 2006

4.9 Seat harness buckle If the NOAH airbag has been inflated with the seat harness not opened, the seat harness buckle can be damaged. After such incidence the complete harness must be removed prior to the next flight and sent to its manufacturer for inspection and repair. 4.10 Life time of the NOAH components / spare part list The NOAH airbag has a lifetime of 10 years. If the airbag was inflated in an emergency or inadvertently via the pressurised gas cylinder, the airbag must be replaced. part/ drawing no.

description life time

10180810 NOAH-airbag 10 years 10180805 high pressure hose 10 years 10180806 sealing ring for high pressure

hose connection 9,25X1,78 unlimited**

Z80/2 NOAH actuation unit for Schempp-Hirth single seater

unlimited**

ZRB 507 cover for NOAH airbag unlimited** Z108 for types and all variants of Discus/Discus 2 Ventus/Ventus-2

pressurised gas cylinder with valve

unlimited** inspection of the cylinder (every 10 years) according to TRG

** if no damage or excessive wear can be detected 4.11 Sending in for maintenance Maintenance stations: SCHEMPP-HIRTH Flugzeugbau GmbH Krebenstraße 25 73230 Kirchheim/Teck Germany or LTB Güntert & Kohlmetz GmbH Industriestr. 40 76646 Bruchsal Germany



Issue: April 2008

4.11 Sending in for maintenance (continued) Refilling the NOAH pressurised gas cylinder or exchange of the safety wire: For such work the NOAH pressurised gas cylinder must not be shipped to the maintenance station. You may proceed according to enclosure 1 “NOAH refilling instructions” 5 List of tools I.) universal pliers II.) open end spanners 10mm, 2 pieces 22mm III.) socket wrench 7mm with extension IV.) screw driver 6 Materials for maintenance split pin 2x20 DIN 94 St (securing of the Bowden cable) split pin 4x28 DIN 94 St (transport securing)



Issue: October 2006

7 Pictures/Drawings Actuation handle with ground securing



Issue: October 2006

Installation scheme Discus/Ventus

activ

atio

n ca

ble

and

safe

ty c

able

activ

atio

n ca

ble

activ

atio

n ca

ble airb

ag

cabl

e to

the

pres

suris

ed g

as c

ylin

der

(low

er B

owde

n ca

ble)

cabl

e to

the

harn

ess

buck

le

(upp

er B

owde

n ca

ble)

NO

AH

rele

ase

hand

le

high

pre

ssur

e ho

se

batte

ry

supp

ort

pres

suris

ed g

as

cylin

der

harn

ess

buck

le



Issue: October 2006

Installation scheme Discus-2/Ventus-2

activ

atio

n ca

ble

and

safe

ty c

able

activ

atio

n ca

ble

activ

atio

n ca

ble

airb

ag

Cab

le to

the

pres

suris

ed

gas

cylin

der

(low

er B

owde

n ca

ble)

Cab

le to

the

harn

ess

buck

le

(upp

er B

owde

n ca

ble)

NO

AH

rele

ase

hand

le

high

pre

ssur

e ho

se

Pre

ssur

ised

ga

s cy

linde

r (b

elow

cov

er)

harn

ess

buck

le



Issue: October 2006

Folding the airbag (drawing ZRB 507)



Issue: April 2008

Pressurised gas cylinder with tap cock valve and safety devices (drawing Z108a)



Issue: April 2008

Pressurised gas cylinder with tap cock valve and safety devices – variant (drawing Z108b)



Issue: April 2008

8 Appendix 8.1 List for annual weight measurement

Date SN of bottle Weight of bottle Inspection signature

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25

Manual for the emergency bail out aid NOAH - LBS scheme Discus/Ventus ... (see flight manual section...

Documents

Transcript of Manual for the emergency bail out aid NOAH - LBS scheme Discus/Ventus ... (see flight manual section...