Aerodynamic surface load sensing

Details Aerodynamic surface load sensing Aerodynamic surface load sensing

1976-06-11

1978-09-19

Caldwell, Sr., John W.

Communications: electrical

Selective

Having indication or alarm

73178H, 244 1713, 340407, 364426, G08B 2100

Patent

active

041157559

ABSTRACT:
The factors (including collective pitch, weight, altitude density, rotor speed and airspeed) which determine the extent to which the rotor of a helicopter may be loaded, are fed into a look-up table, and the permissible acceleration normal to the rotor is compared against actual acceleration normal to the rotor, an alarm signal resulting whenever the actual exceeds the permissive; the alarm signal may be utilized to shake the collective stick so as to simulate pre-overload vibration as a warning to the pilot.

REFERENCES:
patent: 3520499 (1970-07-01), Ask
patent: 3590636 (1971-07-01), Eddy
patent: 3618002 (1971-11-01), Stinson
patent: 3733039 (1973-05-01), O'Connor et al.
patent: 4032083 (1977-06-01), Maciolek

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