2014 Bell Helicopter Textron Inc. 11 Demonstrating the Third Generation TiltrotorDemonstrating the Third Generation Tiltrotor Society of Experimental

Ó 2014 Bell Helicopter Textron Inc.

11

Demonstrating the Third Generation Tiltrotor

Society of Experimental Test Pilots | 25 October 2014

This research was partially funded by the Government under agreement No. W911W6-13-2-0001. The U.S. Government is authorized to reproduce and distribute reprints for Government purposes notwithstanding any copyright notation thereon. The views and conclusions contained in this document are those of the authors and should not be interpreted as representing the official policies, either expressed or implied, of the Aviation Applied Technology Directorate or the U.S. Government.


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Definitions V-280 Valor is the Bell Naming Convention for 3rd Gen Tiltrotor Effort

JMR TD REDUCES RISK FOR FVL

Science & Technology (S&T) Program of Record (PoR)

MPSModel Performance

Specification

AVCDAir Vehicle Concept

Demonstrator

FVLICD

BAA

MPS

TIA

JMR – Joint Multi-Role FVL – Future Vertical Lift


• Teammates bringing the engineering resources, capabilities, and critical thinking to advance the design and technology maturation.

Flight Control System Engine Support

Fuselage

Mission System Architecture and Mission Equipment

Packages

Elastomerics Hydraulics

Over-Wing FairingV-Tails FuelElectrical

Industrial Base - Teammates

http://www.globalsecurity.org/military/systems/aircraft/systems/images/t64-image02.jpg

http://moog.com/

http://www.lockheedmartin.com/us.html

http://www.astronics.com/


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Voice of the Customer

BELL’S TECHNOLOGY DEMONSTRATOR TO ADDRESS THESE CAPABILITIES

Affordability

Hover Maneuverability

High Hot Operations

Sustainability

Commonality

Science & Technology (S&T)

Program of Record

Speed, Range, Payload,Reliability, Survivability


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vs. UH-60 Radius at 6kft/95ºF

TRANSFORMATIONAL AGILITY



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TRANSFORMATIONAL REACHvs. UH-60 Range at Sea Level



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Footprint Comparison


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MPS & Variants

Attack

Marinized

MPS Updates

Common Fuselage30 mm nose gunInternal Weapons Bays•Fwd Bay – Fwd Firing, Deploys Outboard•2 Aft Bays - Lateral Firing


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Non-RotatingFixed Engines

Fly-By-Wire

Large Side Door

Conventional RetractableLanding Gear

2 Pilots / 2 FTEs

Advanced Rotor and Drive System

Low Disk Loading

VTOL MODE

Superior Low-Speed Maneuverability

Concept Demonstrator


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Advanced Composite Fuselage

Cruises at 280 knots

High Aspect Ratio, Straight Wing(Large Cell Carbon Core)

Turboprop-likeRide Quality

Superior High-Speed Handling Qualities

CRUISE MODE

V-Tail with Ruddervators

Concept Demonstrator


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Wing Design for Manufacture

Affordability Characteristics• Semi-Monocoque design (large cell

carbon core)• No skin stiffening details/ fasteners• Straight wing (few splice details)• Broad goods lay up with reduced pad ups• Bonded continuous skin assemblies• Minimal ply drops• Bonded LCCC rib assembly• Tooled interfaces – reduced shimming• Determinate assembly• Point of use material dispensing• Minimal compactions

REDUCED COMPLEXITY, FEWER PARTS, LOWER COST


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Rotor- Building on Experience

• Lightweight carbon blades• 25% cost savings

• Broad goods yoke• 40% cost savings

Key TechnologiesProven Configuration

• 3 Bladed• Stiff In-plane • Underslung• Gimbaled hub• Variable speed

ADVANCED TECHNOLOGY IMPROVES VALUE AND PERFORMANCE OF COMBAT PROVEN ROTOR CONFIGURATION


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Flight Control System - Overview• Full-authority digital fly-by-wire flight control system• Triplex electronic & hydraulic systems• Systems Integration Lab development & testing• ADS-33 Level I handling qualities (low-speed operations)• Flight envelope protection

• Structural load limiting• Conversion corridor protection

SidearmControls

SwashplateControl

PylonConversion

Active Rotor Flapping ControlFor Low Speed Maneuverability

Tail Wheel Steering

IntegratedEngine Control

Flight ControlComputers

FlaperonControl

RuddervatorControl


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Hover / Low Speed Maneuver

Hover Yaw Quickness:Based on Control Power/Inertia ratioTiltrotor configuration = large Izz

Increased control power – Meets anticipated ADS-33 Level 1 yaw

quickness

Low Speed Maneuverability:MPS Requirement is 1.4g (45 bank)

constant altitude turn at 80 kt, with reserve to accelerate

Requirement intended to size rotor & engine

Tiltrotor solution utilizes wing lift and thrust vectoring to meet spec with lightest rotor and minimum power required

Yaw

rate

to h

eadi

ng ch

ange

ratio

Heading change

Level 1 Bndry

Level 2 Bndry

V280

Level 2

Level 1

Level 3

ADS-33 Yaw Quickness criteria(Approximation)

Note: ADS-33 spec change likely to reduce L1 for small heading changes


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Demonstrator MissionCrew: 4 Payload: MPS Representative

229 nm mission radius


In priority order:

1. Accomplish First Flight

2. Demo 280 KTAS

3. Expand to 6K/95 HOGE

4. Evaluate agility, loads, and vibes

5. Demo high altitude VTOL capability

6. Validate mission performance radius and range capability

7. Perform demo flights

8. Demo operational capabilities – simulated fast rope, slung loads, PDAS situational awareness, MTEs, slope landings, simulated air refueling

9. Demo STOL with build-up to MTOGW

10. Collect additional data for model validation – high altitude, high speed, cg extremes

Demonstration Goals

Env Exp 1 Env Exp 2 Demo


Flight Envelope Build-up Approach

0

5000

10000

15000

20000

0 50 100 150 200 250 300

Pres

sure

Alti

tude

(ft)

Airspeed (KCAS)

VTOL Mode Conv Mode

VDIVE

Vstall

VMCP

Cruise Mode

High Hot HOGE

Env Exp 1


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Exceptional capability• Speed, range, payload, survivability

Manageable technical risk• Proven technology• Major cost and performance

improvements

Total ownership cost• Unprecedented fuel efficiency

• Greatest operational productivity

• Proven commonality with variants

THE NEXT GENERATION OF VERTICAL LIFT: TWICE AS FAST, TWICE AS FAR

Third Generation Tiltrotor


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Questions?

Documents

2014 Bell Helicopter Textron Inc. 11 Demonstrating the Third Generation TiltrotorDemonstrating the Third Generation Tiltrotor Society of Experimental