Vertipedia - Vertol Model PH-42 (44)

With a passenger capacity of 19 in additon to the two pilots, the Model PH-42 (Model 44) is the same as the H-21C except for its performance.

Overview

Data on design, manufacture and status

Design authority: Vertol Aircraft Corporation

Primary manufacturer: Vertol Aircraft Corporation

Parent type: No type defined

Aircraft status: No longer flying

Configuration

Primary flight and mechanical characteristics

VTOL type: Helicopter

Lift devices: 2 in Tandem (Fore/aft) configuration

Crew required: 2 in Side-by-side 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

Overall Dimensions
Overall Height:	5.18 m	17.0 ft
Overall Length:
Overall Width:	21.00 m	68.9 ft

Airframe Dimensions
Airframe Length:	16.80 m	55.1 ft
Airframe Width:
Airframe Height:

Landing Gear Dimensions
Landing Gear Base:	3.79 m	12.4 ft
Landing Gear Track:

Cabin Dimensions
Cabin Internal Height:	1.76 m	5.8 ft
Cabin Internal Length:	4.50 m	14.8 ft
Cabin Internal Width:	1.60 m	5.2 ft

Cruise Speed: 98 mph (157.716 km/h)

Weights
Max Gross Weight (ground):	6,033 kg	13,300 lb
Max Gross Weight (airborne):
Max Take-off Weight:	6,033 kg	13,300 lb
Empty Weight:	3,629 kg	8,000 lb

Climb Performance
Max Rate of Climb:	6 m/s	1,080 fpm

Hover Performance
Hover Ceiling IGE:
Hover Ceiling OGE:

Limitations
Max Level Flight Speed:
Never Exceed Speed:
Service Ceiling:	2,880 m	9,450 ft

Range and Endurance
Max Range:	547 km	295 nm
Max Endurance:

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

Powerplant
Number of engines:	1
Designation:	Wright R-1820-103 reciprocating
Manufacturer:	Wright Aeronautical Division, Curtiss-Wright Corporation

Normal Ratings
Max continuous:	951 kW	1275 hp
Take-off / rated:	1063 kW	1425 hp
Intermediate:
Maximum:

OEI Ratings
OEI contingency:
OEI continuous:
OEI 30-second:
OEI intermediate:

Fwd rotor rotates ant-clockwise, aft rotor rotates clockwise

Main Rotor Characteristics
Diameter:	13.41 m	44.00 ft
RPM:
Direction of Rotation:	Counter-rotating
Hub Type:	Fully articulated

Main Rotor Blade Characteristics
Blade Construction:	Metal with D section steel spar
Blade Chord:
Blade Tip Geometry:	Conventional
Blade Twist:
Number of Blades:	3

Main Rotor Derived Characteristics
Disc Area:	141.26 m²	1520.6 ft²
Disc Loading:	21.35 kg/m²	4.373 lb/ft²
Solidity:

Main Rotor Blade Derived Characteristics
Blade area per blade:
Tip Speed:

Tail Rotor Characteristics
Diameter:
Configuration:	Unknown
Direction of Rotation:	Unknown
RPM:

Tail Rotor Blade Characteristics
Number of Blades:
Blade Construction:	N/A
Blade Chord:
Blade Twist:

Tail Rotor Derived Characteristics
Disc Area:
Solidity:

Tail Rotor Blade Derived Characteristics
Tip Speed:
Blade Area (per blade):

References

References and sources used

Helicopters from "A to Z" | Part I

Ralph P. Alex
AHS Newsletter, 1961, October, 1961 (page 12)
Periodical

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Number of engines:	1 Reciprocating
Max Level Flight Speed:
Max Range:	547 km	295 nm
Max Endurance:

Main Rotor Diameter:	13.41 m	44.00 ft
Max Gross Weight (ground):	6,033 kg	13,300 lb