Vertipedia - Sikorsky R-5A

FIrst production version of the R-5 series for the USAAF. Essentially identical to the YR-5A used by the USAAF for evaluation.

Overview

Data on design, manufacture and status

Design authority: Sikorsky Aircraft Division, United Aircraft and Transport Corporation

Primary manufacturer: Sikorsky Aircraft Division, United Aircraft and Transport Corporation

Parent type: Sikorsky VS-327/S-48/R-5

Aircraft status: No longer flying

Configuration

Primary flight and mechanical characteristics

VTOL type: Helicopter

Lift devices: 1 Single main rotor

Dedicated control device: 1 Tail rotor

Crew required: 1-2 in Tandem arrangement

Landing gear: Wheels (non-retractable)

Key Characteristics

Data on key physical features

Aircraft Details

Data on aircraft configuration, weights, flight performance and equipment

Layout and Dimensions

Weights and Performance

Engine Details

Primary Lift Device

Primary Control Device

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:

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

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:

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:

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:

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):

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

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Number of engines:	1 Reciprocating
Max Level Flight Speed:
Max Range:	418 km	226 nm
Max Endurance:

Main Rotor Diameter:	14.63 m	48.00 ft
Max Gross Weight (ground):	2,223 kg	4,900 lb