Second prototype of the YH-16 program. Crashed 1956 due to an mechanical failure of the instrumentation system of the aft main rotor.

A video of the aircraft can be viewed on the VHS YouTube site  below,

Source: "Turbo Transporter': Huge Craft in FIrst Public Showing", Vertical Flight Society YouTube site, Published on 4 Mar 2012


Data on design, manufacture and status

Design authority: Piasecki Helicopter Corporation

Primary manufacturer: Piasecki Helicopter Corporation

Parent type: Piasecki YH-16

Aircraft status: No longer flying


Primary flight and mechanical characteristics

VTOL type: Helicopter

Lift configuration: Tandem (Fore/aft) (x2)

Crew required: 3

Crew seating: Side-by-side

Landing gear: Wheels (non-retractable)

Layout and Dimensions

Data on aircraft size

Overall Dimensions
Overall Height: 7.62 m 25.0 ft
Overall Length: 40.84 m 134.0 ft
Overall Width: 24.99 m 82.0 ft
Airframe Dimensions
Airframe Length: 23.77 m 78.0 ft
Airframe Width:  
Airframe Height:  
Landing Gear Dimensions
Landing Gear Base:  
Landing Gear Track:  
Cabin Dimensions
Cabin Internal Height:  
Cabin Internal Length:  
Cabin Internal Width:  

Weights and Performance

Data on aircraft weight and flight characteristics

Cruise Speed: 120 mph (193.121 km/h); Unofficial speed record of 166 mph in 1956.

Max Gross Weight (ground): 15,230 kg 33,576 lb
Max Gross Weight (airborne):  
Max Take-off Weight: 15,230 kg 33,576 lb
Empty Weight: 10,208 kg 22,505 lb
Useful Load: 5,022 kg 11,072 lb
Empty Weight Fraction: 0.670
Climb Performance
Max Rate of Climb:  
Hover Performance
Hover Ceiling IGE:  
Hover Ceiling OGE:  
Max Level Flight Speed: 225 km/h 121 kts
Never Exceed Speed: 235 km/h 127 kts
Service Ceiling: 5,821 m 19,098 ft
Range and Endurance
Max Range: 370 km 200 nm
Max Endurance:  

Engine Details

Aircraft powerplant (lift and/or propulsion)

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

Number of engines: 2
Designation: Allison YT-38-A-10 turbine
Manufacturer: Allison Engine Company
Normal Ratings
Max continuous: 1342 kW 1799 hp
Take-off / rated:  
OEI Ratings
OEI contingency:  
OEI continuous:  
OEI 30-second:  
OEI intermediate:  

Primary Lift Device

Data on primary lift devices such as main rotors

Longitudinal Tandem main rotors

Main Rotor Characteristics
Diameter: 25.00 m 82.02 ft
Direction of Rotation: Counter-rotating
Hub Type: Fully articulated
Main Rotor Blade Characteristics
Blade Construction: Aluminium alloy with honeycomb filler
Blade Chord:  
Blade Tip Geometry:
Blade Twist:  
Number of Blades: 3
Main Rotor Derived Characteristics
Disc Area: 490.87 m² 5283.9 ft²
Disc Loading: 15.51 kg/m² 3.177 lb/ft²
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
Configuration: Unknown
Direction of Rotation: Unknown
Tail Rotor Blade Characteristics
Number of Blades:  
Blade Construction: N/A
Blade Chord:  
Blade Twist:  
Tail Rotor Derived Characteristics
Disc Area:  
Tail Rotor Blade Derived Characteristics
Tip Speed:  
Blade Area (per blade):  

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