DRAFT 15 Oct 13
Refle tions Flight Testing the ATF Prototypes YF-23 Paul Metz (F) YF-22 Mark Shackelford (M)
Not Your Typical Competition Risk Reduction for Signature, Avionics, Aero Design, and Propulsion Contractors had lead; Air Force provided safety oversight and test resources Core team cross-briefed; Most of test team detailed to contractor Five pilots: three contractor, one AF test pilot, one AF OT pilot No head-to-head competition Submitted sealed envelope performance predictions before flight test started Flight test results compared to predictions Used by AF To Judge Credibility Of Predictive Processes Overall Objective: Find the Best Team to Build the Best Advanced Tactical Fighter
YF-22 DEM/VAL FLIGHT TEST
EVOLUTION OF STEALTH
DEM VAL TEST OBJECTIVES Ship One Ship Two Supercruise Agility Weapons Bay Environment Missile Launches High Angle of Attack Loads Operational Factors
FLIGHT CONTROL SURFACES LEADING EDGE FLAPS SPEED BRAKE RUDDERS HORIZONTAL STABILATORS AILERONS THRUST VECTORING NOZZLES FLAPERONS
THRUST VECTORING IN ACTION
COCKPIT FEATURES Color Liquid Crystal Displays Finger-on-Glass (FOG) Controls Side Stick Articulating Ejection Seat Tactical Life Support System (TLSS)
TACTICAL LIFE SUPPORT SYSTEM (TLSS)
Our Cheerful Staff Is Ready To Fly For You! Jon Beesley Tom Morgenfeld Maj Mark Shackelford Dave Ferguson Lt Col Willie Naigle
YF-22 FLIGHT HISTORY
YF-22 FLIGHT STATISTICS YF-22A No. 1 GE YF120 Engines Total Flights 43 Total Flight Hours 52.8 Maximum AOA/Minimum Airspeed 60 deg/82kcas Maximum Mach >2.00 Maximum Altitude 50,000 ft. YF-22A No. 2 P&W YF119 Engines Total Flights 31 Total Flight Hours 38.8 Maximum AOA/Minimum Airspeed 20 deg/135 KCAS Maximum Mach Number 1.81 Maximum Altitude 45,000 ft.
FAMILY PORTRAIT
SLEEPING WITH THE ENEMY
YF-23 DEM/VAL FLIGHT TEST Paul Metz NAD Jim Sandberg NAD Bill Lowe MACAIR MAJ Ron Taco Johnston AFFTC MAJ Con Thueson AFOTEC
Flight Control Surfaces LEADING EDGE FLAPS RUDDERVATORONS HORIZONTAL STABILATORS AILERONS + FLAPERONS = SPEED BRAKE
Picture Window Effect Flush Ports (No FT Boom) Gausian Shape Bread Loaves
YF-23 Planform-Profile
Tandem Wing
Flight Controls Laws Alpha/G-Command Low/High Speeds Pitch,Yaw and Roll Hold Feet-on-floor Engine Out No Pilot Input = Hold Attitude Integrated Engine Mode (IEM)
YF-23 FLIGHT STATISTICS YF-23A No. 1 P&W YF119 Engines (YF-22) (GE YF120) Total Flights 34 (43) Total Flight Hours 44.3 (52.8) Maximum AOA/Minimum Airspeed 25 deg (60 deg) Maximum Mach 1.8 (>2.00) Maximum Altitude 50,050 ft. (50,000 ft.) YF-23A No. 2 GE YF120 Engines (P&W YF119) Total Flights 16 (31) Total Flight Hours 21.6 (38.8) Maximum AOA/Minimum Airspeed 20 deg (20 deg) Maximum Mach Number 1.72 (1.81) Maximum Altitude 50,000 ft. (45,000 ft.)
YF-23 Flight History
Overall Results GREAT Flight Control Laws Subcutaneous Autopilot No Surprises Level Accels and Turn Perf Formation and AAR Engines Superb but..
Lesson Learned Be Prepared For the Unexplainable (Apollo 13 Phenomenon) Monitor All Data ALL THE TIME If It Isn t Making Sense--STOP IMMEDIATELY
Gausian The Shaping Apollo 13 Phenomenon
How it Went Outstanding performance by two tremendous teams Both teams demonstrated they could design, build and safely fly LO configured aircraft and deliver outstanding performance and handling qualities Two new designs, and two new engines flew without incident 157.4 hours in 3 months Both teams brought outstanding teams and aircraft design to make the ATF a success
Dedicated to the Memory of Dave Ferguson (F) YF-22 Chief Test Pilot
Conventional Control Actuators Low Speed Requirement: LARGE Throws + Small Forces = Long, Skinny Actuator
Conventional Control Actuators High Speed Requirement: Small Throws + Large Forces = Short, Fat Actuator
The VAVR Actuators High Speed Requirement: Small Throws + Large Forces = 2 Chambers Pressurized Low Speed Requirement: Large Throws + Small Forces = 1 Chamber Pressurized
Supercruise Performance YF-22s PAV-2 PAV-1 I****************I YF-23s PAV-1 PAV-2 l****************i Mach Number