Performance and Vibration Analyses of Lift-Offset Helicopters

Table 1

General properties of XH-59A lift-offset compound helicopter.

Hub type	Hingeless rotor
Radius [ft]	18
Number of rotors	2
Number of blades	3
Total solidity,	0.127
Tip speed [ft/sec],
Helicopter mode	650
Compound helicopter mode	450
Maximum speed [knots]
Helicopter mode	160
Compound helicopter mode	240
Horizontal tail
Area [ft^2]	60
Span [ft]	15.50
Tail length [ft]	20.30
Vertical tail
Area [ft^2]	30
Span [ft]	12
Tail length [ft]	20.30
Fuselage
Length [ft]	40.5
Width [ft]	6.08
Height [ft]	6.08
Rotor separation [ft]	2.5
Power plants
Lift	PT6T-3 turboshaft engine
Thrust	J60-P-3A turbojet engine