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LETTER REPORT: "JPATS MULTIVARIATE CASES 1 AND 7 ACCOMMODATION IN SELECTED AIRCRAFT"

Kenneth W. Kennedy, Ph.D.
Consultant
Yellow Springs, Ohio 45387

To:

Design Technology Branch
AL/CFHD - Mr. G.F. Zehner
Human Engineering Division
Armstrong Laboratory
Wright-Patterson Air Force Base, Ohio 45433

10 January 1994

     Joint Primary Aircraft Training System (JPATS) Anthropometric Multivariate Cases 1 and 7 have been examined in light of the accommodation they are offered in the USAF T-37B, T-38A, F-16A, and C-141A cockpits. Parameters considered include: maximum Sitting Height accommodated (set full down), minimum combined leg length to access rudder pedals (seat full up), leg clearance with the main instrument panel (seat full down), maximum Buttock-Knee Length to clear cockpit structure during ejection (all seat positions), vision over the nose and under windscreen bow (seat full up), and minimum reaches necessary to access a selection of hand controls (seat full up). All information except reach regression charts were taken from your Aircraft Accommodation Database.

     Since multivariate cases 1 and 7 report anthropometric data on small female subjects we do not find accommodation problems associated with maximum Sitting Height accommodated, leg clearance with the main instrument pane, and maximum Buttock-Knee Length to clear cockpit structure during ejection.

     We do find potential accommodation problems with these cases in minimum combined leg length to access rudder pedals, vision over the nose, and minimum reaches necessary to access hand controls.


ANTHROPOMETRY

                                                 Case 1                                    Case 7
                                             Generalized                             Objective
                                              Small Pilot                              (Female)
                                                (Female)

     Thumbtip Reach                 27.0"                                       26.1"
     Buttock-Knee Length        21.3                                         20.8
     Knee Height, Sitting           18.7                                         18.1
     Sitting Height                       32.8                                         31.0
     Eye Height, Sitting              28.0                                         26.0
     Shoulder Height, Sitting    20.6                                         19.5


OVERHEAD CLEARANCE

     Aircraft                    Seat
                                   Position                        Case 1                                Case 7

       F-16A                    Full Up                  4.4" (Incl. Helmet)             6.2" (Incl. Helmet)
      
       C-141A (Left)     Full Up & Fwd      7.3" (Bare Head)              10.1" (Bare Head)

       T-37B (Left)           Full Up                5.2" (Incl. Helmet)             5.0" (Incl. Helmet)

       T-38A (Fwd)          Full Up                8.7" (Incl. Helmet)            11.5" (Incl. Helmet)

       T-38A (Aft)             Full Up                3.2" (Incl. Helmet)             5.0" (Incl. Helmet)

       T-1A (Left)          Full Up & Fwd      6.3" (Bare Head)               8.1" (Bare Head)


KNEE/SHIN CLEARANCE WITH MAIN INSTRUMENT PANEL

     Aircraft                       Seat
                                       Position                         Case 1                             Case 7

       F-16A                     Full Up                             5.7"                                   6.2"  
      
       C-141A (Left)     Full Up & Fwd               Surplus                           Surplus

       T-37B (Left)          Full Up                            5.4"                                   5.7"

       T-38A (Fwd)         Full Up                            NA                                     NA

       T-38A (Aft)            Full Up                            NA                                     NA

       T-1A (Left)        Full Up & Fwd                   NA                                     NA


EJECTION CLEARANCE WITH GLARE SHIELD

     Aircraft                      Seat
                                    Position                         Case 1                            Case 7

        F-16A                    All Pos                             8.2"                                 8.7"


EJECTION CLEARANCE WITH WINDSCREEN BOW

     Aircraft                      Seat
                                    Position                          Case 1                            Case 7

       T-37B (Left)            All Pos                              5.1"                                 5.6"

       T-38A (Fwd)           All Pos                              9.5"                                10.0"

       T-38A (Aft)             Full Up                             11.5"                               12.0"


VISION OVER THE NOSE - IN DEGREES

       F-16A                      Full Up                            -10.0                               -5.0 
      
       C-141A (Left)     Full Up & Fwd                    -9.1                                -6.0      

       T-37B (Left)            Full Up                             -9.2                                -7.0

       T-38A (Fwd)           Full Up                             -4.5                                -1.7

       T-38A (Aft)             Full Up                               NA                                   NA

       T-1A (Left)         Full Up & Fwd                    -10.0                                -6.0


VISION UNDER CANOPY BOW - IN DEGREES
      
       C-141A (Left)      Full Up & Fwd                    +25.6                             +27.0

       T-37B (Left)            Full Up                              +14.2                             +21.2

       T-38A (Fwd)           Full Up                              +  8.0                              +10.0

       T-38A (Aft)              Full Up                              +  8.8                              +12.0

       T-1A (Left)          Full Up & Fwd                     +18.4                              +22.0


ACCESS TO RUDDER PEDALS - CARRIAGE FULL AFT

       F-16A                         Full Up                         1.6" Excess*                   0.5" Excess*          
      
       C-141A (Left)     Full Up & Fwd                  0.6" Short**                     1.7" Short**

       T-37B (Left)              Full Up                         0.8" Short**                     1.1" Short**

       T-38A (Fwd)             Full Up                         3.0" Short**                     4.1" Short** 

       T-38A (Aft)                Full Up                         2.8" Short**                     3.9" Short**

       T-1A (Left)          Full Up & Fwd                  0.4" Short**                     0.7" Short**

* Cases #1 and #7 could reach with their legs these amounts beyond that necessary to fully depress pedals. 

** Cases #1 and #7 would need to have legs these amounts longer to fully depress pedals. 


HAND REACH CAPABILITY TO CONTROLS - REACH ZONE 2 MISS DISTANCES AND RIGHT OR LEFT HAND ARE INDICATED. (Only those controls that could not be reached by more than 1.0 inch are listed. Those not reached under the more stringent Zone 1 reach requirement are not included and would add significantly to the list.)

PLEASE NOTE: ONLY SELECTED HAND CONTROLS WERE EXAMINED. THEREFORE, THE ABSENCE OF A CONTROL IN THE FOLLOWING LISTS DOES NOT NECESSARILY IMPLY THAT IT COULD BE REACHED. THE APPEARANCE OF A HAND CONTROL ON THESE LISTS DOES NOT NECESSARILY IMPLY DISACCOMMODATION. SOME SHOULD BE REACHED UNDER ZONE 1 REQUIREMENTS, OTHERS UNDER ZONE 3.


REACH ZONE 2 MISS DISTANCES - SUBJECTS REQUIRED THESE AMOUNTS OF ADDITIONAL REACH TO ACCESS CITED CONTROLS.

NOTE: When it is feasible that a given control might be reached with either hand and neither can reach it, miss distances for both are given - the greatest first.

F-16A, MULTIVARIATE CASE 1, SEAT FULL UP:

     Airspeed Mach Ind.  6.0", Left Hand
     Altimeter Select Knob  7.3", LH
     Course Select  5.5", LH
     DIS/LTS  5.0", LH
     Emergency Stores Jettison  2.6", LH
     Fuel Quantity Select  5.5", RH
     HUD Filter  2.2", LH
     HUD DISP MILS DEPR  4.2", LH
     HSI Pull to Cage  8.6", LH
     IFF Ident  2.9", LH
     ILS Volume  1.9", RH
     Pitch Alt Hold  2.4", LH
     Select Jettison  4.6", LH
     Shift Multiple Function Display  3.8", LH
     TACAN Heading  4.1", LH

F-16A, MULTIVARIATE CASE 7, SEAT FULL UP:

     All of the above by greater values, plus the following:

     Down Lock Release  1.8", Left Hand
     Storage Config CAT 1  1.5", LH


C-141A, MULTIVARIATE CASE 1, LEFT COCKPIT, SEAT FULL UP AND FWD:

     ADI LT  2.2", Left Hand
     Anti Skid Toggle  11.8", LH
     BDHI Set Index Left  1.8", LH
     Brake T-Handle  1.9", LH
     Cargo Doors - All Doors  1.5", LH
     Chute Release Off  1.9", LH
     Circuit Breaker Panel, XMTR-1, 11.4", LH
     Co Pilot Side Console Lights  11.1", RH
     Emergency Cabin Depressurize T-Handle  2.3", RH
     Emergency Oxygen Shut-Off 6.2", LH
     Emergency Pressure LH Toggle  6.5", LH
     Engine Fire Test-4  8.7", RH
     Fire Extinguisher T-Handle #4  3.2", RH
     Flaps Landing Aft  3.1", RH
     HSI Course Set Knob-Left  2.3", RH
     Instrument Power Toggle  1.1", RH
     Landing Gear Handle  9.1", RH
     Mach Incr Toggle  1.2", RH
     Rudder Hi Pressure O'Ride  5.6", RH
     Thrust Reverse Limiter  6.2", RH
     Weather Radar Slew Toggle  2.6", RH
     Windshield Heat  4.1", RH

C-141A, MULTIVARIATE CASE 7, LEFT COCKPIT, SEAT FULL UP AND FWD:

     All of the above by a greater value plus the following:

     ADF Control Transfer 2  1.2", Right Hand
     BDHI VOR 2 Left  1.3", LH
     Trim Reset Toggle  1.1", RH

T-37B, MULTIVARIATE CASE 1, LEFT COCKPIT, SEAT FULL UP

     AC Fuses Lowermost Right  14.4", Right Hand
     AC Fuses Uppermost Right  12.4", RH
     AN-APX 72 Transponder Control Panel - MA  3.7", RH
     Battery Switch  3.2", LH
     Cockpit Air Lever  4.4", RH
     Cockpit Air Temp Control Rheostat  3.2", RH
     Control Stick Grip, Full Fwd Left  2.1", RH
     DC Circuit Breaker L'most Right  11.1", RH
     DC Circuit Breaker U'most Right  10.8", RH
     Left Fuel Shutoff T-Handle  1.9", LH
     Right Fuel Shutoff T-Handle  2.8", LH
     Left Generator Switch  3.1", LH
     Right Generator Switch  4.2", LH
     Inverter Switch  1.4", LH
     NAV DME Control Panel Sel Switch  3.6", RH
     UHF Command Radio ARC 164  3.4", RH

T-38B, MULTIVARIATE CASE 7, LEFT COCKPIT, SEAT FULL UP:

     No additional controls.


T-1A, MULTIVARIATE CASE 1, LEFT COCKPIT, SEAT FULL UP AND FWD:

     Cabin Controller  4.3", Right Hand
     Cabin Dump  5.4", RH
     Climb-Dive Pull to Cage  1.6", RH
     Defog Lever  1.6", LH
     Emergency Brake  1.6", RH
     Landing Gear Downlock Release  1.5", RH
     Temperature Control Panel - Man-Press-Cntrl  8.9", RH

T-1A, MULTIVARIATE CASE 7, LEFT COCKPIT, SEAT FULL UP AND FWD:

     All of the above by a greater value plus the following:

     Landing Gear Lever  1.5", Right Hand


T-38A, MULTIVARIATE CASE 1, FORWARD COCKPIT, SEAT FULL UP:

     AIMS Control Panel Master Knob  2.8", Right Hand
     Airspeed Mach Inc  2.3", LH
     Altimeter Set Knob  4.3", LH and 2.9", RH
     AOA Index Lights Dimmer  2.2", LH
     Battery Switch  3.5", RH
     Boost Pump Left, Switch  1.9", RH
     Boost Pump Right, Switch  2.1", RH
     Cabin Air Temp Switch  5.6", LH and 2.4", RH
     Cabin Pressure Switch Ram Dump  3.3", LH and 2.3", RH
     Cabin Temp Control Knob  8.2", LH and 3.9", RH 
     Cabin Defog Knob  8.3", LH and 4.2", RH
     Canopy Jettison T-Handle  3.1", RH
     Canopy Locking Lever  4.1", RH
     Circuit Breaker Panel ARC 164  11.1", RH and 8.9", LH
     Circuit Breaker Panel Caution Warning  10.9", RH and 9.6", LH
     Clock Set Button  1.6", LH
     Comm Antenna Switch  2.2", LH
     Compass Switch  4.3", LH
     Control Stick Full Fwd Left  4.4", RH
     Crossfeed Switch  2.3", RH
     Engine Anti Ice Switch  5.6", LH and 2.7", RH 
     HSI Heading Set Knob  3.6", RH and 1.8", LH 
     ILS Control Panel Frequency Knob   8.0", RH and 6.0", LH
     ILS Control Panel Power  7.3", LH and 7.3", RH
     Inertia Reel Locking Lever  1.9", LH
     Intercom Switch Comm  4.3", LH
     Intercom Switch ILS  4.5", LH
     Landing Gear Alt Rel Handle  1.9", LH
     Landing Taxi Light Switch  2.2", LH
     Master Caution Light  3.4", LH and 2.4", RH
     NAV Mode Switch TACAN  1.8", LH
     Oxygen Supply Switch 100%-Norm  4.1", RH
     Oxygen Supply Switch Emergency Norm Test  3.1", RH
     Oxygen Supply Switch On-Off  4.8", RH
     Pitot Heat Switch  4.6", LH and 2.8", RH
     Radio Transfer Switch Comm  2.0", LH
     Radio Transfer Switch NAV  2.3", LH
     Rudder Pedal Adjust T-Handle  7.1", RH and 5.7", LH
     Seat Adjust Switch  1.5", RH
     Standby Attitude Ind  1.1", LH
     TACAN Control Panel A/A-T/R  6.5", LH and 6.4", RH
     TACAN Control Panel Channel Knob  7.0", RH and 4.8", LH
     UHF Command Radio Control Panel - Main  7.1", RH and 4.3", LH
     UHF Command Radio Control Panel - Preset  6.0", RH and 5.3", LH

T-38A, MULTIVARIATE CASE 7, FORWARD COCKPIT, SEAT FULL UP

     All of the above by a greater value plus the following:

     Throttle, Full Forward  1.1", Left Hand


T-38A, MULTIVARIATE CASE 1, AFT COCKPIT, SEAT FULL UP:

     Airspeed Mach Ind  3.8", Left Hand
     Altimeter Set Knob  4.0", LH and 2.7", RH
     AOA Indexer Lights Dimmer  3.1", LH
     Canopy Jettison T-Handle  3.4", RH
     Canopy Locking Lever  3.7", RH
     Clock Set Button  2.7", LH
     Command & NAV O-Ride Switch  3.2", LH
     Control Stick Full Fwd Left  5.1", RH
     Downlock O'Ride Button  1.1", LH
     Engine Start Button-L  4.6", LH
     HSI Course Select Knob  2.9", LH and 2.6", RH 
     HSI Heading Set Knob  4.1", RH and 3.5", LH
     ILS Control Panel Frequency Knob  7.8", RH and 7.4", LH
     ILS Control Panel Power  8.1", LH and 7.1", RH
     Inertia Reel Locking Lever  1.9", LH
     Intercomm Switch Comm  4.2", LH
     Intercomm Switch ILS  4.6", LH
     Intercomm Switch Inter  4.3", LH
     Intercomm Switch NAV  4.3", LH
     Landing Gear Warning Light Silence Button  1.3", LH
     Lighting Control Panel Cockpit Floods  3.2", RH
     Master Caution Light  3.7", LH and 1.7", RH
     NAV Mode Switch TACAN  2.9", LH
     Oxygen Supply Switch 100%-Norm  5.3", RH
     Oxygen Supply Switch Emergency Norm Test  4.0", RH
     Oxygen Supply Switch On-Off  5.7", RH
     Rudder Pedal Adjust T-Handle  7.4", RH and 6.6", LH
     Seat Adjust Switch  3.3", RH
     Standby Attitude Ind  2.6", LH
     TACAN Control Panel A/A-T/R  7.0", LH and 5.8", RH
     TACAN Control Panel Channel Knob  6.6", RH and 5.7", LH
     UHF Command Radio Control Panel - Main  6.2", RH and 5.3", LH
     UHF Command Radio Control Panel - Preset  6.1", LH and 5.3", RH
     
T-38A, MULTIVARIATE CASE 7, AFT COCKPIT, SEAT FULL UP:

     All of the above by a greater value plus the following:

     Steering Mode Switch Norm-Manual  1.5", Left Hand


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