IInitial experimental prototype for the R-5 Type series. 5 built.

Overview

Data on design, manufacture and status

Configuration

Primary flight and mechanical characteristics

VTOL type: Helicopter

Lift configuration: Single main rotor

Dedicated control device: Tail rotor

Crew required: 1-2

Crew seating: Tandem

Landing gear: Wheels (non-retractable)

Layout and Dimensions

Data on aircraft size

Overall Dimensions
Overall Height: 4.00 m 13.1 ft
Overall Length: 17.40 m 57.1 ft
Overall Width: 14.63 m 48.0 ft
Airframe Dimensions
Airframe Length: 13.70 m 45.0 ft
Airframe Width:  
Airframe Height: 4.00 m 13.1 ft
Landing Gear Dimensions
Landing Gear Base:  
Landing Gear Track: 3.70 m 12.1 ft
Cabin Dimensions
Cabin Internal Height:  
Cabin Internal Length:  
Cabin Internal Width:  

Weights and Performance

Data on aircraft weight and flight characteristics

Cruise Speed: 85 mph (136.794 km/h)

Weights
Max Gross Weight (ground): 2,223 kg 4,900 lb
Max Gross Weight (airborne):  
Max Take-off Weight: 2,223 kg 4,900 lb
Empty Weight: 1,656 kg 3,651 lb
Useful Load: 567 kg 1,249 lb
Empty Weight Fraction: 0.745
Climb Performance
Max Rate of Climb: 6 m/s 1,200 fpm
Hover Performance
Hover Ceiling IGE:  
Hover Ceiling OGE:  
Limitations
Max Level Flight Speed:  
Never Exceed Speed: 198 km/h 107 kts
Service Ceiling: 4,267 m 14,000 ft
Range and Endurance
Max Range: 418 km 226 nm
Max Endurance:  

Engine Details

Aircraft powerplant (lift and/or propulsion)

Provided powerplant data is for uninstalled, sea level, static operations.

Powerplant
Number of engines: 1
Designation: P&W R-985-AN-5 reciprocating
Manufacturer: Pratt & Whitney
Normal Ratings
Max continuous:  
Take-off / rated: 336 kW 450 hp
Intermediate:  
Maximum:  
OEI Ratings
OEI contingency:  
OEI continuous:  
OEI 30-second:  
OEI intermediate:  

Primary Lift Device

Data on primary lift devices such as main rotors

NACA 0012 airfoil

Main Rotor Characteristics
Diameter: 14.63 m 48.00 ft
RPM:  
Direction of Rotation: Counterclockwise
Hub Type: Fully articulated
Main Rotor Blade Characteristics
Blade Construction: Blades made from ood spars, plywood ribs and leading edge, canvas covered pockets
Blade Chord:  
Blade Tip Geometry: Elliptical
Blade Twist:  
Number of Blades: 3
Main Rotor Derived Characteristics
Disc Area: 168.11 m² 1809.6 ft²
Disc Loading: 13.22 kg/m² 2.708 lb/ft²
Solidity:  
Main Rotor Blade Derived Characteristics
Blade area per blade:  
Tip Speed:  

Primary Control Device

Data on primary control devices such as tail rotors

Tail Rotor Characteristics
Diameter: 2.44 m 8.01 ft
Configuration: Pusher
Direction of Rotation: Top blade aft
RPM:  
Tail Rotor Blade Characteristics
Number of Blades: 3
Blade Construction:  
Blade Chord:  
Blade Twist:  
Tail Rotor Derived Characteristics
Disc Area: 4.68 m² 50.3 ft²
Solidity:  
Tail Rotor Blade Derived Characteristics
Tip Speed:  
Blade Area (per blade):  

Related VFS Resources

Resources related to the XR-5 , provided by the Vertical Flight Society.
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Related Public Resources

Resources related to the XR-5 , provided by public sources across the internet.

Images