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Military Factory > Military Aircraft > Boeing CH-46 Sea Knight
 
 
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Boeing CH-46 Sea Knight

The CH-46 is to the United States Marine Corps what the CH-47 is to the United States Army.
By Staff Writer

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The CH-46 Sea Knight is similar in design and role to the CH-47 Chinook series of transport helicopters. Both offer up unobstructed access to the aircraft by keeping engine components mounted above the design. Both also utilize the patented tandem three-blade rotor design that is most closely associated with the Chinook. Despite these similarities, the Chinook is the larger of the two designs and is the primary workhorse for the US Army whereas the Sea Knight serves the US Marine Corps and, to a degree, the United States Navy.

The CH-46 utilizes two Lycoming turboshaft engines to drive the powerful main rotor blades. Crew accommodations amount to two or three standard personnel with spacing in the cabin for an additional 15-25 troops and 15 stretcher patients. The Sea Knight, like its Chinook counterpart, can also carry external sling loads if need be.

The CH-46 was designed from the Model 107 which was actually evaluated by the US Army through three YCH-1A designated prototypes. Though the Army elected to take the larger C-47, which would become the Chinook, the US Marine Corps accepted their CH-46's as the Sea Knight in 1961 to replace their aging UH-34 series. By 1964, deliveries were in full swing and the CH-46 entered service. Along with USMC use, the US Navy also procured several Sea Knights for sea-borne ship replenishment duty.

The CH-47 saw several variants derived from initial models and service experience, each differing in avionics upgrades, subtle redesigns and powerplant changes. Canada accepted the CH-46 as the "Voyageur" and the "Labrador" to fill roles in search and rescue and transport respectively. Additionally, the CH-46 has appeared with Japanese forces as the KV 107 model series in various roles and with Sweden as the HKP-4 series.

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Last Revision: 9/8/2009

 
 
  Specifications for the Boeing CH-46E Sea Knight
arrow downDimensions:
Length: 44.82ft (13.66m)
Width:0.00ft (0.00m)
Height: 16.70ft (5.09m)

arrow downPerformance: About MACH
Max Speed: 166mph (267kmh; 144kts)
Max Range: 690miles (1,110km)
Rate-of-Climb: 1,715ft/min (523m/min)
Service Ceiling: 9,498ft (2,895m; 1.8miles)

arrow downStructure:
Accommodation: 3 + 25
Hardpoints: 0
Empty Weight: 11,585lbs (5,255kg)
MTOW: 24,299lbs (11,022kg)

arrow downPowerplant:
Engine(s): 2 x General Electric T58-GE-16 turboshaft engines generating 1,870shp and driving two 3-blade rotor systems.
arrow downArmament Suite:
None.

  Pictures of the Boeing CH-46 Sea Knight
     
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Picture of the Boeing CH-46 Sea Knight
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Picture of the Boeing CH-46 Sea Knight
Image courtesy of the United States Department of Defense.

flag of United States
1964

Designation: Boeing CH-46 Sea Knight
Classification Type: Medium Lift Multirole Transport Helicopter
Contractor: Boeing - USA

Country of Origin: United States
Production Total: Not Available

Operators: Canada, Japan, Sweden, Saudi Arabia and the United States of America.


  Variants
Model 107 - Vertol Prototype Model; fitted with 2 x Lycoming T53 turboshaft engines.

YCH-1A - US Army Prototype Evaluation Model designation of which three were produced.

HRB-1 - Initial Production Designation for US Marine Corps, later redesignated to CH-46 after 1962.

CH-46A - Initial Production Designation from HRB-1 after 1962; 107 produced for US Marine Corps usage; fitted with General Electric T58-GE-8 turboshaft engines.

UH-46A - Similar to the CH-46A but for US Navy use; 14 such delivered.

CH-46D - USMC model fitted with T-58-GE-10 powerplants.

UH-46D - US Navy model similar to CH-46D USMC model.

CH-46E - Upgraded CH-46D and CH-46F models; fitted with T58-GE-16 powerplants; improved crew survivability features.

CH-46F - Improved avionics

CH-113 "Labrador" - Canadian CH-46A search and rescue models.

CH-113A "Voyageur" - Canadian CH-46A transport models.

HKP-4 - Swedish variant fitted with Rolls-Royce powerplants.

KV 107 - Japan license-produced Model 107 series of various role types.

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