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VFW-Fokker H3 Sprinter helicopter

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Specifications Comment this helicopter
Picture H3_Sprinter
General
Manufacturer VFW-Fokker
Type H3 Sprinter
Introduced 4/1/1970
In production? No
Units produced 2
Price US $ 0.00
Dimensions
Overall Length 30.5 ft
Length 0 ft
Height 8.2 ft
Width 0 ft
   
   
Description

The H3 Sprinter was a light experimental helicopter that originated in West Germany. It was produced in by the VFW-Fokker joint venture that began in 1969.

The H3-E model was built as either a three-seat executive transport, a two-stretcher ambulance or and agricultural aircraft.

The H3 employed a single-engine design and a distinctive compressed air tip-drive rotor. Separate forward thrust came from a set of fuselage-mounted fans.

Amazingly for the time, the H3 made extensive use of aluminum and glass-fiber reinforced plastic laminate. The aluminum mostly went into a load-bearing keel which served as support for the cabin, landing gear and engine bay. The composite plastics were used for the cabin’s skin.

The sole engine was made by Allison and produced 400 shaft horsepower. However, not all of those horses actually went to the shaft. Thanks to the unique propulsion system of the H3 it would also have to drive the compressor system when hovering. The air followed a winding path through ducts until it was passed via a rotor-mounted distributor into the blades themselves and to the tip jets.

The rotor itself had a three-bladed design. This is where the remarkable cold blade tip drive system could finally express itself as thrust. Alternatively, the air could be ducted to the forward-thrusting fans instead, all seamlessly handled by then state-of-the-art gearbox.

Originally the idea was that the H3 would be the start of an entire family of tip-jet aircraft, but after only a few flights it became clear that this method of propulsion was not effective for an aircraft at this size.

All in all, only two H3 prototypes were ever built and today this unique and technically impressive helicopter is nothing more than a small but significant footnote in the history of helicopters.

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Design features
  • Compressed air, blade tip-drive, rotor propulsion system
  • Rotor tip-drive system eliminates need for tail rotor
  • Forward-thrust by fuselage-mounted fans
  • Tricycle, non-retractable, landing gear
  • Fuselage built around an aluminum alloy load-bearing keel supporting cabin, landing gear, and engine bay structure
  • Glass-fiber reinforced plastic laminate skin
Description

The H3 Sprinter was a light experimental helicopter that originated in West Germany. It was produced in by the VFW-Fokker joint venture that began in 1969.

The H3-E model was built as either a three-seat executive transport, a two-stretcher ambulance or and agricultural aircraft.

The H3 employed a single-engine design and a distinctive compressed air tip-drive rotor. Separate forward thrust came from a set of fuselage-mounted fans.

Amazingly for the time, the H3 made extensive use of aluminum and glass-fiber reinforced plastic laminate. The aluminum mostly went into a load-bearing keel which served as support for the cabin, landing gear and engine bay. The composite plastics were used for the cabin’s skin.

The sole engine was made by Allison and produced 400 shaft horsepower. However, not all of those horses actually went to the shaft. Thanks to the unique propulsion system of the H3 it would also have to drive the compressor system when hovering. The air followed a winding path through ducts until it was passed via a rotor-mounted distributor into the blades themselves and to the tip jets.

The rotor itself had a three-bladed design. This is where the remarkable cold blade tip drive system could finally express itself as thrust. Alternatively, the air could be ducted to the forward-thrusting fans instead, all seamlessly handled by then state-of-the-art gearbox.

Originally the idea was that the H3 would be the start of an entire family of tip-jet aircraft, but after only a few flights it became clear that this method of propulsion was not effective for an aircraft at this size.

All in all, only two H3 prototypes were ever built and today this unique and technically impressive helicopter is nothing more than a small but significant footnote in the history of helicopters.

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Design features:
  • Compressed air, blade tip-drive, rotor propulsion system
  • Rotor tip-drive system eliminates need for tail rotor
  • Forward-thrust by fuselage-mounted fans
  • Tricycle, non-retractable, landing gear
  • Fuselage built around an aluminum alloy load-bearing keel supporting cabin, landing gear, and engine bay structure
  • Glass-fiber reinforced plastic laminate skin
Performance
Persons 3
Max. Range 0 mi
Cruise Speed 155 mph
Max. Speed 186 mph
Max. rate of Climb 395 ft/min
HOGE ceiling 0 ft
Service Ceiling 13120 ft
Gross Weight 2134 lb
Empty Weigt 1091 lb
Useful Load 1043 lb
Dynamic system
Fuel Capacity 0 gallons
Number of Engines 1
Engine Type Turbine
Engine Code Allison 250-C20
Horse Power 400
Rotorhead Fully articulated
Number of rotorblades 3
Rotor Diameter 28.5 ft
Number of tail rotorblades 0
Tailrotor Diameter 0 ft
Blueprints & model
Manufacturer Website manufacturer..
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