1. Demonstrating the Third Generation Tiltrotor
This research was partially funded by the Government under agreement No. W911W 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.
Society of Experimental Test Pilots | 25 October 2014

2. Definitions JMR – Joint Multi-Role FVL – Future Vertical Lift
V-280 Valor is the Bell Naming Convention for
3rd Gen Tiltrotor Effort
JMR – Joint Multi-Role
FVL – Future Vertical Lift
TIA
BAA
MPS
FVL
ICD
Program of Record (PoR)
Science & Technology (S&T)
MPS
Model Performance Specification
AVCD
Air Vehicle Concept Demonstrator
JMR TD REDUCES RISK FOR FVL

3. Industrial Base - Teammates
Teammates bringing the engineering resources, capabilities, and critical thinking to advance the design and technology maturation.
Mission System Architecture and Mission Equipment Packages
Flight Control System
Engine Support
Elastomerics
Hydraulics
V-Tails
Fuselage
Over-Wing Fairing
Electrical
Fuel

4. Bell’s TECHNOLOGY DEMONSTRATOR To Address these capabilities
Voice of the Customer
Science & Technology
(S&T)
Speed, Range, Payload,
Reliability, Survivability
Affordability Hover Maneuverability High Hot Operations Sustainability Commonality
Program of Record
Bell’s TECHNOLOGY DEMONSTRATOR To Address these capabilities

5. TRANSFORMATIONAL AGILITY
vs. UH-60 Radius at 6kft/95ºF
TRANSFORMATIONAL AGILITY
Ó 2014 Bell Helicopter Textron Inc.

6. TRANSFORMATIONAL REACH vs. UH-60 Range at Sea Level
Ó 2014 Bell Helicopter Textron Inc.

7. Footprint Comparison

8. MPS & Variants MPS Updates Attack Marinized Common Fuselage
30 mm nose gun
Internal Weapons Bays
Fwd Bay – Fwd Firing, Deploys Outboard
2 Aft Bays - Lateral Firing
Marinized

9. Advanced Rotor and Drive System
Concept Demonstrator
Superior Low-Speed
Maneuverability
Advanced Rotor and Drive System
Low Disk Loading
2 Pilots / 2 FTEs
Fly-By-Wire
Non-Rotating
Fixed Engines
Large Side Door
Conventional
Retractable
Landing Gear
Vtol Mode

10. Concept Demonstrator CRUISE Mode V-Tail with Ruddervators
High Aspect Ratio, Straight Wing
(Large Cell Carbon Core)
Cruises at 280 knots
Turboprop-like
Ride Quality
Advanced Composite
Fuselage
Superior High-Speed
Handling Qualities
CRUISE Mode

11. 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

12. Rotor- Building on Experience
Proven Configuration
Key Technologies
3 Bladed
Stiff In-plane
Underslung
Gimbaled hub
Variable speed
Lightweight carbon blades
25% cost savings
Broad goods yoke
40% cost savings
Advanced Technology improves value and performance of combat proven rotor configuration

13. 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
Sidearm
Controls
Swashplate
Control
Pylon
Conversion
Active Rotor Flapping Control
For Low Speed Maneuverability
Tail Wheel
Steering
Integrated
Engine Control
Flight Control
Computers
Flaperon
Ruddervator

14. Hover / Low Speed Maneuver
Hover Yaw Quickness:
Based on Control Power/Inertia ratio
Tiltrotor 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

15. Demonstrator Mission 229 nm mission radius Crew: 4
Payload: MPS Representative
229 nm mission radius

16. Demonstration Goals In priority order: Accomplish First Flight
Demo 280 KTAS
Expand to 6K/95 HOGE
Evaluate agility, loads, and vibes
Demo high altitude VTOL capability
Validate mission performance radius and range capability
Perform demo flights
Demo operational capabilities – simulated fast rope, slung loads, PDAS situational awareness, MTEs, slope landings, simulated air refueling
Demo STOL with build-up to MTOGW
Collect additional data for model validation – high altitude, high speed, cg extremes
Env Exp 1
Env Exp 2
Demo

17. Flight Envelope Build-up Approach

18. Third Generation Tiltrotor
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

19. Questions?