Vertipedia - Berliner Model 1

With two lateral tandem main rotors, the fuselage was that of the conventional single-seater airplane with wings. The aircraft flew for 1.5 minutes in the year 1924.

Overview

Data on design, manufacture and status

Design authority: Emile and Henry Berliner

Primary manufacturer: Emile and Henry Berliner

Parent type: No type defined

Aircraft status: No longer flying

Configuration

Primary flight and mechanical characteristics

VTOL type: Helicopter

Lift devices: 2 in Tandem (Lateral) configuration

Crew required: 1 in Single seater 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:	2.06 m	6.8 ft
Overall Length:	6.25 m	20.5 ft
Overall Width:

Airframe Dimensions
Airframe Length:
Airframe Width:	11.58 m	38.0 ft
Airframe Height:

Landing Gear Dimensions
Landing Gear Base:
Landing Gear Track:

Cabin Dimensions
Cabin Internal Height:
Cabin Internal Length:
Cabin Internal Width:

Weights
Max Gross Weight (ground):	870 kg	1,918 lb
Max Gross Weight (airborne):
Max Take-off Weight:	870 kg	1,918 lb
Empty Weight:	748 kg	1,650 lb

Climb Performance
Max Rate of Climb:

Hover Performance
Hover Ceiling IGE:
Hover Ceiling OGE:

Limitations
Max Level Flight Speed:
Never Exceed Speed:
Service Ceiling:

Range and Endurance
Max Range:
Max Endurance:

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

Powerplant
Number of engines:	1
Designation:	Bentley Model 2 reciprocating
Manufacturer:	Bentley and Bentley

Normal Ratings
Max continuous:
Take-off / rated:	149 kW	200 hp
Intermediate:
Maximum:

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

Main Rotor Characteristics
Diameter:	4.57 m	15.00 ft
RPM:
Direction of Rotation:	Counter-rotating
Hub Type:

Main Rotor Blade Characteristics
Blade Construction:
Blade Chord:
Blade Tip Geometry:
Blade Twist:
Number of Blades:	2

Main Rotor Derived Characteristics
Disc Area:	16.42 m²	176.7 ft²
Disc Loading:	26.50 kg/m²	5.427 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 11)
Periodical

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Number of engines:	1 Reciprocating
Max Level Flight Speed:
Max Range:
Max Endurance:

Main Rotor Diameter:	4.57 m	15.00 ft
Max Gross Weight (ground):	870 kg	1,918 lb