The Gallaudet D-4

 

Gallaudet D-1 Photo: USN via C. Owers	D-4 : In Flight Photo: George Dettling Collection via Rob Osborne	D-4 : In Flight Photo: George Dettling Collection via Rob Osborne
D-4 : In Flight Photo: George Dettling Collection via Rob Osborne	D-4 : In Flight Photo: George Dettling Collection via Rob Osborne	D-4 : In Flight Photo: George Dettling Collection via Rob Osborne
D-4 : In Flight Photo: George Dettling Collection via Rob Osborne	D-4 : Takeoff Photo: George Dettling Collection via Rob Osborne	D-4 : Afloat Photo: George Dettling Collection via Rob Osborne
D-4 : Docked Photo: George Dettling Collection via Rob Osborne	D-4 : East Greenwich, R.I. Photo: George Dettling Collection via Rob Osborne	D-4 : East Greenwich Bay, R.I. Photo: George Dettling Collection via Rob Osborne
Gallaudet D-4 Photo: George Dettling Collection via Rob Osborne	D-4 : Launch Photo: George Dettling Collection via Rob Osborne	D-4 : Launch Photo: George Dettling Collection via Rob Osborne
D-4 : Forward Fuselage Photo: George Dettling Collection via Rob Osborne	D-4 : Center Section Photo: George Dettling Collection via Rob Osborne	D-4 : Propeller Photo: George Dettling Collection via Rob Osborne
D-4 : Aft Fuselage Photo: George Dettling Collection via Rob Osborne	D-4 : Aft Fuselage Photo: George Dettling Collection via Rob Osborne	D-4 : Elevator Cables Photo: George Dettling Collection via Rob Osborne
D-4 : Empennage Photo: George Dettling Collection via Rob Osborne	D-4 : On Pier Photo: George Dettling Collection via Rob Osborne	D-4 : Aft Fuselage Assy Photo: George Dettling Collection via Rob Osborne
D-4 : Aft Fuselage Assy Photo: George Dettling Collection via Rob Osborne	Aft Fuselage Assy - Static Test Photo: George Dettling Collection via Rob Osborne	Aft Fuselage Assy - Static Test Photo: George Dettling Collection via Rob Osborne
D-4 : Wing Assy Photo: George Dettling Collection via Rob Osborne	Gallaudet D-4 Source: USN via C. Owers	Gallaudet D-4 Source: USN via C. Owers

Length (overall)                                   33 ft 5 in
Span (upper)                                       46 ft 5 in
Span (lower)                                       45 ft 0 in
Chord (upper)                                       7 ft 0 in
Chord (lower)                                       7 ft 0 in
Gap                                                 7 ft 0 in
Wing Area                                           612 sq ft
Airfoil                                                RAF 15
Seats                                                       2

Gross Weight                                        5,400 lbs
Empty Weight                                        3,800 lbs

Useful Load                                         1,600 lbs
  Water                                               115 lbs
  Pilot and Observer                                  350 lbs
  Fuel and Oil                                        650 lbs
  Ordnance                                             95 lbs
  Bombs                                               390 lbs

Max Speed  (per Woodhouse, may be dive speed)         126 mph
High Speed                                            119 mph
Cruise Speed  (1260 rpm/16 gph fuel flow)              78 mph
Landing Speed                                          57 mph
Landing Speed (per Woodhouse)                        42.6 mph
Slowest Getaway (per Woodhouse)                        46 mph

Time, SL to 2,100 ft (per Woodhouse)                    2 min
Time, SL to 5,900 ft                                   10 min
Ceiling                                              8,000 ft

Flying Radius (full power)                              3 hrs
Max Endurance                                        7.19 hrs

Powerplant                                Liberty 12 (380 hp)

Armament                                          1 Lewis Gun
                                                      2 Bombs

Year of Introduction                                     1916
Total Production                                            2

Notable features:
-Engine located mid fuselage/Prop Midship
-Observer in front cockpit
-Main Float has Step
-Swept Wing

Much of the above data came from "Textbook of Aeronautic Engineering",
Henry Woodhouse, 1920 via Dave Cadorette.