KIRK CHARLES FREDERICKSON
Pilots at Benham Rd, Seymour, CT
License number
Connecticut A0625631
Category
Airmen
Type
Authorized Aircraft Instructor
Address
Address
146 S Benham Rd, Seymour, CT 06483
Professional information
Vibration Isolator For Rotorcraft
US Patent:
5954480, Sep 21, 1999
Filed:
Aug 28, 1997
Appl. No.:
8/919928
Inventors:
David N. Schmaling - Southbury CT
Frederick J. Miner - Barkhamsted CT
Albert T. Krauss - Harwinton CT
Kirk C. Frederickson - Seymour CT
Frederick J. Miner - Barkhamsted CT
Albert T. Krauss - Harwinton CT
Kirk C. Frederickson - Seymour CT
Assignee:
Sikorsky Aircraft Corporation - Stratford CT
International Classification:
B64C 2706, B64C 2732
US Classification:
416145
Abstract:
A vibration isolator (20) operative for reducing vibration active on a main rotor (12) of a rotorcraft. The vibration isolator (20) includes a hub attachment fitting (22) secured in combination with the main rotor (12) and a spring-mass system (24) mounting to and rotating with the hub attachment fitting (22). The vibration isolator (20) is characterized by the spring-mass system (24) having a fairing (44) operative to aerodynamically contour the spring-mass system (24) while providing a portion of the working mass thereof. Other features of the vibration isolator include adapting the hub attachment fitting (22) to accept hub-mounted rotor systems (36), provide access to the rotor hub mounting attachment (34), and provide a motion limiting portion (74) for reducing loads acting on the spring-mass system (24).
Directional Control Arrangement To Provide Stabilizing Feedback To A Structural Bending Mode
US Patent:
2009028, Nov 19, 2009
Filed:
May 19, 2008
Appl. No.:
12/123420
Inventors:
Kirk C. Frederickson - Seymour CT, US
International Classification:
B64C 27/82, B64C 13/30, F16C 1/10
US Classification:
244 1721, 244233, 745005
Abstract:
A control system and method of producing a stabilizing feedback includes generating a control output with a link in response to a deflection of a structure, the control output operable to at least partially resist the deflection.
Harmonic Force Generator For An Active Vibration Control System
US Patent:
7958801, Jun 14, 2011
Filed:
Oct 1, 2003
Appl. No.:
10/676775
Inventors:
Kirk Charles Frederickson - Seymour CT, US
Assignee:
Sikorsky Aircraft Corporation - Stratford CT
International Classification:
F16C 15/00, F16F 15/32, B07B 1/44, B64C 1/40, B64C 23/00
US Classification:
745722, 745724, 209367, 244 1 N
Abstract:
A force generator for an active vibration control (AVC) system provides a mass located upon an inner circular member which is movable within an outer circular member to simultaneously complete one revolution about its axis as it orbits within the outer circular member to compensate for sensed vibrations. A crank mounts the inner circular member and a counterweight. The crank is rotated by a prime mover such as an electric motor. The mass will therefore generate a sinusoidal inertial force in a straight line. Multiple systems are suitably arranged to be used in conjunction with one another to provide a wide range of inertial force outputs.