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Seibel S-3 helicopter

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Specifications Comment this helicopter
Picture S-3
General
Manufacturer Seibel
Type S-3
Introduced 9/20/1947
In production? No
Units produced 1
Price US $ 0.00
Dimensions
Overall Length 0 ft
Length 0 ft
Height 0 ft
Width 0 ft
   
   
Description

The S-3 was an experimental ultralight helicopter built by the Seibel Helicopter company. It first took flight in September of 1947.

The S-3 was a helicopter that Charles Seibel built and flew mainly to demonstrate his company’s simplified two-bladed rotor system and transmission.

Each blade attaches to the rotor hub with the help of a piece of bent sheet metal. This formed an angle that could be “twisted” to control changes in pitch. The advantage of this design is how mechanically simple it is. There is no need for bearings, hinges or dampers.

This makes the system relatively cheap and therefore attractive for small enthusiast helicopters.

To induce lateral movement, all you need is to shift the center of gravity. This is achieved through a lever-controlled linkage system that pitched the entire fuselage side to side, or back and forth. Thus shifting the center of gravity.

The S-3 possessed a single 65 horsepower Franklin engine and weighed a scant 365 kg when loaded.It could cruise at a leisurely 112 kilometers per hour and climb at 275 meters per minute to a ceiling of 3.66 kilometers.

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Design features
  • Bearingless and hingless rotorhead design by attaching the rotors to the mast by means of bended metal sheets
  • Stepped, steel tube box frame with two decks
  • Direction control by shifting the center of gravity so no need for cyclic control.
  • Tapered, monocoque tailboom.
  • Tricycle landing gear
Description

The S-3 was an experimental ultralight helicopter built by the Seibel Helicopter company. It first took flight in September of 1947.

The S-3 was a helicopter that Charles Seibel built and flew mainly to demonstrate his company’s simplified two-bladed rotor system and transmission.

Each blade attaches to the rotor hub with the help of a piece of bent sheet metal. This formed an angle that could be “twisted” to control changes in pitch. The advantage of this design is how mechanically simple it is. There is no need for bearings, hinges or dampers.

This makes the system relatively cheap and therefore attractive for small enthusiast helicopters.

To induce lateral movement, all you need is to shift the center of gravity. This is achieved through a lever-controlled linkage system that pitched the entire fuselage side to side, or back and forth. Thus shifting the center of gravity.

The S-3 possessed a single 65 horsepower Franklin engine and weighed a scant 365 kg when loaded.It could cruise at a leisurely 112 kilometers per hour and climb at 275 meters per minute to a ceiling of 3.66 kilometers.

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Design features:
  • Bearingless and hingless rotorhead design by attaching the rotors to the mast by means of bended metal sheets
  • Stepped, steel tube box frame with two decks
  • Direction control by shifting the center of gravity so no need for cyclic control.
  • Tapered, monocoque tailboom.
  • Tricycle landing gear
Performance
Persons 1
Max. Range 0 mi
Cruise Speed 70 mph
Max. Speed 0 mph
Max. rate of Climb 902 ft/min
HOGE ceiling 0 ft
Service Ceiling 12000 ft
Gross Weight 805 lb
Empty Weigt 540 lb
Useful Load 265 lb
Dynamic system
Fuel Capacity 0 gallons
Number of Engines 1
Engine Type Piston
Engine Code Franklin
Horse Power 65
Rotorhead Bearing and hingless design
Number of rotorblades 2
Rotor Diameter 25 ft
Number of tail rotorblades 2
Tailrotor Diameter 0 ft
Blueprints & model
Manufacturer Website manufacturer..
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HeliStart is authored by Peter Goossens.


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