SAFE 2010 H R Smith Group of Companies www.searchandrescue.com H R - - PowerPoint PPT Presentation

safe 2010
SMART_READER_LITE
LIVE PREVIEW

SAFE 2010 H R Smith Group of Companies www.searchandrescue.com H R - - PowerPoint PPT Presentation

SAFE 2010 H R Smith Group of Companies www.searchandrescue.com H R Smith Group of Companies H R Smith Group of Companies Techtest Ltd Head Office Herefordshire UK Specmat Inc Rockford Tennessee H R Smith Group of Companies Presentation


slide-1
SLIDE 1

H R Smith Group

  • f Companies

H R Smith Group of Companies www.searchandrescue.com

SAFE 2010

slide-2
SLIDE 2

H R Smith Group

  • f Companies

Specmat Inc Rockford Tennessee Techtest Ltd Head Office Herefordshire UK

H R Smith Group of Companies

slide-3
SLIDE 3

H R Smith Group

  • f Companies

Presentation Scope

  • Ejection seat emergency transmitters
  • Benefits of auto-activation during ejection
  • JSF demonstration phase solution
  • A new approach for production JSF
  • Practical experience & lessons learnt
  • Future applications.
slide-4
SLIDE 4

H R Smith Group

  • f Companies

500 500-27 27-07 07 PLB PLB

  • 406 SARSAT Certified
  • Aviation Qualified
  • Integral GPS
  • 121.5 / 243 MHz
  • Two-way Speech

Emergency Transmitter for JSF

slide-5
SLIDE 5

H R Smith Group

  • f Companies

Traditional Activation Methods

  • Manual - dependent on crew status
  • Water - ineffective over land
  • Acceleration – difficult to profile
  • Ejection seat lanyard – most favoured.

How to activate the beacon?

Benefits of early activation……

slide-6
SLIDE 6

H R Smith Group

  • f Companies

Timeline

Line of Sight Visibility

LOS Earlier activation increases beacon range and reduces rescue time

Airborne Activation Benefits

slide-7
SLIDE 7

H R Smith Group

  • f Companies

And avoids

  • bscuration

by geographic features

Airborne Activation Benefits 30 …in the UK

slide-8
SLIDE 8

H R Smith Group

  • f Companies

Beacon activation during ejection therefore:

Airborne Activation Benefits

  • Minimizes delay in emergency transmission
  • Ensures greatest terrestrial visibility
  • Avoids obscuration by geographic features
  • Enhances satellite detection probability.
slide-9
SLIDE 9

H R Smith Group

  • f Companies

When to Activate to activate the beacon which then transmits throughout the descent. Man-Seat Separation provides the optimum trigger

slide-10
SLIDE 10

H R Smith Group

  • f Companies

Production JSF Requirement

pilot-selectable in-flight activation-inhibit facility. AND An auto-activation system for the US16E ejection seat independent of lanyards and electrical wiring

slide-11
SLIDE 11

H R Smith Group

  • f Companies
  • Pilot selectable
  • Pilot proof
  • Easily accessible in flight
  • Mechanically interfaced with ejection seat
  • Electrically interfaced with beacon
  • No electrical wiring or power requirements.

Enable – Inhibit Requirement

slide-12
SLIDE 12

H R Smith Group

  • f Companies

Solution… A Fully Integrated Magnetically Operated ‘Wireless’ System

slide-13
SLIDE 13

H R Smith Group

  • f Companies

Auto-activation Cradle 500-27-07 Beacon Beacon securing strap Cradle-strap locking mechanism

US16E Auto-activation System

Arm / Off Switch

slide-14
SLIDE 14

H R Smith Group

  • f Companies

Is Beacon set to ARM

  • r

OFF

ARM NO OFF

Beacon ON

Activation Decision Tree

START

YES

EJECTION

Man-seat Separation

Beacon OFF Beacon OFF

slide-15
SLIDE 15

H R Smith Group

  • f Companies

The Challenges

  • Fully automated activation
  • In flight Arm-Off selection by pilot
  • No electrical wires or interfaces
  • No mechanical moving parts
  • No lanyards or linkages
  • No physical seat attachments
  • Beacon easily recoverable for normal use.
slide-16
SLIDE 16

H R Smith Group

  • f Companies

The Problem The difficulty comes in understanding and specifying the ejection and post-ejection environment

Ejection Testing

slide-17
SLIDE 17

H R Smith Group

  • f Companies

The Problems There is no problem that cannot be solved by the use

  • f high explosives

(Anonymous)

slide-18
SLIDE 18

H R Smith Group

  • f Companies

Cradle Structural Damage

Polyetherimide (PEI) Injection moulding Used for its exceptional tensile strength and flexibility

slide-19
SLIDE 19

H R Smith Group

  • f Companies

Remedial Options

  • Enlarge the Switch-Cradle cross-section

(Increased cross-section area by over three times)

  • Use glass reinforced Polyethersulphone (PES)

(More brittle than PEI)

  • Consider non-Magnetic metal construction

(Poorer tensile strength than PEI)

  • Treat the cradle as a one-shot device.

(A practical option during testing.)

slide-20
SLIDE 20

H R Smith Group

  • f Companies

Cradle Structural Failure

Increased mating area with sitting platform

Solution:

Original Section Modified Section

Cradle Structural Damage

slide-21
SLIDE 21

H R Smith Group

  • f Companies

Beacon Securing Strap Release

Inadvertent release of beacon securing strap caused magnet misalignment…………

……..Uncommanded activation

slide-22
SLIDE 22

H R Smith Group

  • f Companies

….& tensioning buckle. Fabric securing strap….

Beacon Securing Strap Release

slide-23
SLIDE 23

H R Smith Group

  • f Companies

Lessons Learnt

  • Overlapping development & production
  • Co-operation essential across all disciplines:
  • Project management
  • Engineering
  • Commercial
  • Pragmatism - best achievable solution
  • Flexibility - willingness to adapt design
  • Resilience - sustaining quality under pressure.
slide-24
SLIDE 24

H R Smith Group

  • f Companies

The Result A Fully Integrated Emergency Transmitter Featuring:

  • 406 MHz SARSAT functionality and speech
  • Automatic wireless activation
  • Pilot Arm-Off switch coupled wirelessly
  • Robust rigorously tested design
  • Post-ejection portable emergency beacon
  • Ease of installation and maintenance.
slide-25
SLIDE 25

H R Smith Group

  • f Companies

The Future

  • Dual-function SAR/CSAR beacon
  • In-flight selection of SAR/CSAR modes
  • Extend concept to other seat variants
  • Investigate other possible applications.

Wireless (Magnetic) Activation…...

slide-26
SLIDE 26

H R Smith Group

  • f Companies

www.searchandrescue.com

Symposium 2010

Thank You Any Questions?