Stierlin R.: RS-40

General data

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Names and dates
Market original model designation
RS-40
Market model designation (english translation or spelling)
RS-40
Project start date
1962
Date of prototype completion
1964
(...)
1963
First flight date and time
1964-07
Country of manufacture
Switzerland
People involved
Robert StierlinConstructor
Config info
Rotorcraft typeHelicopter
Weights
Maximum Takeoff Weight (MTOW)
204
kg
Manufacturers empty weight (MEW)
123
kg
Cabin and cockpit
Maximum number of people onboard
1
External dimensions
Length
6.87
m
Height
1.70
m
Front landing gear track
1.40
m
Main rotor
Main rotor equipped with stabilizing bar
Yes
Main rotor diameter
5.60
m
Main rotor angular speed
500
rpm
Number of blades
2
(...)
3
Main rotor blade chord
0.16
m
Main rotor blade airfoil
NACA 8H12
Main rotor blade mass
4.50
kg
Tail rotor
Drive type
Drive belt
Tail rotor diameter
1.22
m
Tail rotor angular speed
1850
rpm
Tail rotor arm
3.55
m
Powerplant
Engine model
Johnson RDS-22
(...)
Johnson
Engine model (english translation or spelling)
Johnson RDS-22
(...)
Johnson
Engine type
Piston
Engine dry weight
20
kg
Number of engines
1
Total maximum power
40
HP
Angular speed at max power
4500
rpm
Fuel system
Fuel tank capacity
5
l
Average fuel consumption [volumetric]
16
l/h
Performance
Maximum horizontal flight speed (Vh)
120
km/h
Cruise speed (Vc)
80
km/h
(...)
70
km/h
Best rate of climb
3
m/s
Miminum rate of descend in autorotation
5
m/s
Maximum service ceiling
3000
m
Hover ceiling IGE
1000
m
Hover ceiling OGE
650
m
Maximum range
50
km
Maximum flight endurance
0.33
h
0.092