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DESIGN PHILOSOPHY: Twin-engined STOL military/utility aircraft with larger cabin and payload capacity than the Otter, as well as rear loading/air drop capability. Although
certificated to U.S. civil regulations (CAR-4b), most of the Caribou aircraft went to military or government operators. The DHC-4 model was designed with
maximum takeoff, landing and zero fuel weights all equal to 26,000 lb. The -4A was cut-in at S/N 23, and some of the earlier aircraft also were upgraded to operate at the higher weights noted below. Reversible
propellers were introduced as a special option, and fitted to all aircraft after S/N 149. They became standard on S/N 212 and subsequent. |
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PROPULSION |
Engines: |
2 x P&W R-2000-7M2 (Reciprocating) |
Brake Horsepower: |
1450 |
Propellers: |
Hamilton Standard 3-Bladed, Full-Feathering, Reversible |
WEIGHTS |
Basic |
17,630 lb |
Maximum Takeoff |
28,500 lb |
Maximum Landing |
28,500 lb |
Maximum Zero Fuel |
27,000 lb |
Wing Loading |
31.2 lb/sq ft |
Power Loading |
9.83 lb/bhp |
EXTERNAL DIMENSIONS |
Wing Span |
95 ft 7.5 in |
Length |
72 ft 7 in |
Height |
31 ft 9 in |
Tailplane Span |
36 ft 0 in |
Wheel Track |
23 ft 1.5 in |
Wheel Base |
25 ft 8 in |
Wing Area |
912 sq ft |
Aileron Area |
91 sq ft |
Flap Area |
285 sq ft |
Fin Area |
127 sq ft |
Rudder Area (Incl. tab) |
84 sq ft |
Tailplane Area |
144 sq ft |
Elevator Area (Incl. tabs) |
86 sq ft |
INTERNAL DIMENSIONS |
Cabin Length |
28 ft 9 in |
Maximum Width |
7 ft 3 in |
Maximum Height |
6 ft 3 in |
Floor Area |
176 sq ft |
Volume |
1150 cu ft |
Cabin Doors - Left & Right |
30 x 55 in |
Cabin Doors - Rear |
73.5 x 75 in |
PERFORMANCE |
Maximum Cruise Speed at 6500 ft |
186 Knots |
Maximum Permissible Dive Speed (Vne) |
211 Knots |
Economical Cruise Speed at 10,000 ft |
161 Knots |
Stalling Speed (CAS) |
59 Knots |
Rate of Climb at Sea Level - 2 Engines |
1,355 ft/min |
Rate of Climb at Sea Level - 1 Engine |
235 ft/min |
Service Ceiling - 2 Engines |
24,800 ft |
Service Ceiling - 1 Engine |
8,800 ft |
Takeoff Run (STOL) |
725 ft |
Takeoff Distance to 50 ft (STOL) |
1,185 ft |
Landing Run (STOL) |
670 ft |
Landing Distance from 50 ft (STOL) |
1,235 ft |
Payload/Range (Normal Tanks, 45 Min. Reserve): |
200 miles / 8600 lb |
600 miles / 7200 lb |
1,100 miles / 5417 lb |
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