Contact | Advertising | Copyright & Disclaimer
Site map | About

NHI H-3 Kolibrie helicopter

- Advertisement -
Choose unit system:

Specifications Comment this helicopter
Picture H-3_Kolibrie
General
Manufacturer NHI
Type H-3 Kolibrie
Introduced 3/3/1958
In production? No
Units produced 10
Price US $ 40,000.00
Dimensions
Overall Length 0 ft
Length 14.2 ft
Height 9 ft
Width 0 ft
   
   
Description

The H-3 Kolibrie (“Hummingbird) was a very small helicopter of origin made by the NHI (the Dutch Helicopter Industry) and was developed in the 1950s.

Hailing from the early days of helicopter design, the H-3 is quite a Spartan machine, with little in the way of cabin, having to make do with a basic windscreen only. The H-3 certainly lives up to its lightweight namesake.

This helicopter was designed as a general-purpose machine. The entire airframe is made from duralumin tubing. Interestingly, the H-3 was ramjet-powered. At the tip of each of the two rotor blades a ramjet provided thrust to turn the blades. The mechanical motion of the blades was also the source of power for the tail rotor.

One of the main advantages of the ramjet approach is that they would run on a variety of fuels, making the Kolibrie very cost effective and versatile. Apart from this, the decision to design the helicopter around ramjets meant that expensive and complex engine and gearbox components were not necessary. To get the ramjet system going it was necessary to make use of a 2 horsepower starter system. This small motor would bring the rotors to 70 rpm at which point the jets would be ignited.

Unfortunately, the whole mechanism of ramjet propulsion was judged to be too dangerous and unreliable for a production helicopter. Only nine units were ever built as production versions and were then exported to Israel, Germany, the UK and Netherlands New Guinea.

Historically the H-3 is considered a technical triumph, but a commercial failure. Despite the very low purchase price at the time. Although it was versatile, light and cheap the H-3 consumed a relatively large amount of fuel and the jets themselves were not easy to produce at production scale. To further dash the chances of the H-3, the USA provided the Hiller H-23 Raven to the Royal Netherlands Air Force free of charge, making it a poor decision to spend money on H-3 helicopters.

Advertisement
Design features
  • Ramjet powered
  • Small 2 hp auxiliary power unit set the main rotor in motion (in order to ignite the ramjets)
  • Leaf springs as an alternative to conventional hinges
  • Duraluminium tube structure
  • Open cockpit
  • Skid type landing gear
  • Single rotor blade tail rotor
Description

The H-3 Kolibrie (“Hummingbird) was a very small helicopter of origin made by the NHI (the Dutch Helicopter Industry) and was developed in the 1950s.

Hailing from the early days of helicopter design, the H-3 is quite a Spartan machine, with little in the way of cabin, having to make do with a basic windscreen only. The H-3 certainly lives up to its lightweight namesake.

This helicopter was designed as a general-purpose machine. The entire airframe is made from duralumin tubing. Interestingly, the H-3 was ramjet-powered. At the tip of each of the two rotor blades a ramjet provided thrust to turn the blades. The mechanical motion of the blades was also the source of power for the tail rotor.

One of the main advantages of the ramjet approach is that they would run on a variety of fuels, making the Kolibrie very cost effective and versatile. Apart from this, the decision to design the helicopter around ramjets meant that expensive and complex engine and gearbox components were not necessary. To get the ramjet system going it was necessary to make use of a 2 horsepower starter system. This small motor would bring the rotors to 70 rpm at which point the jets would be ignited.

Unfortunately, the whole mechanism of ramjet propulsion was judged to be too dangerous and unreliable for a production helicopter. Only nine units were ever built as production versions and were then exported to Israel, Germany, the UK and Netherlands New Guinea.

Historically the H-3 is considered a technical triumph, but a commercial failure. Despite the very low purchase price at the time. Although it was versatile, light and cheap the H-3 consumed a relatively large amount of fuel and the jets themselves were not easy to produce at production scale. To further dash the chances of the H-3, the USA provided the Hiller H-23 Raven to the Royal Netherlands Air Force free of charge, making it a poor decision to spend money on H-3 helicopters.

- Advertisement -
Design features:
  • Ramjet powered
  • Small 2 hp auxiliary power unit set the main rotor in motion (in order to ignite the ramjets)
  • Leaf springs as an alternative to conventional hinges
  • Duraluminium tube structure
  • Open cockpit
  • Skid type landing gear
  • Single rotor blade tail rotor
Performance
Persons 1
Max. Range 43 mi
Cruise Speed 62 mph
Max. Speed 72 mph
Max. rate of Climb 680 ft/min
HOGE ceiling 0 ft
Service Ceiling 5250 ft
Gross Weight 1543 lb
Empty Weigt 608 lb
Useful Load 935 lb
Dynamic system
Fuel Capacity 105 gallons
Number of Engines 2
Engine Type Ramjet
Engine Code NHI TJ-5
Horse Power 0
Rotorhead Teetering
Number of rotorblades 2
Rotor Diameter 32.8 ft
Number of tail rotorblades 1
Tailrotor Diameter 2.8 ft
Blueprints & model
Manufacturer Website manufacturer..
- Advertisements -



Do you want to comment the NHI H-3 Kolibrie helicopter?

Log In |
|
|
|
or
|
|
|
|
|
(Email address will not be displayed with the comment.)

Name

Email

Enter the above code here:
Can't read? Try different words.


HeliStart is authored by Peter Goossens.


Best Sellers

1: (Book) Cyclic and Collective
2: (Book) Principles of Helicopter Flight
3: Microsoft FSX Steam Edition
4: Logitech Extreme 3D Pro Joystick
5: Saitek Pro Flight Rudder Pedals

[ Log In ]