Aeronautics and astronautics – Landing gear – Wheel
Patent
1990-04-27
1992-04-14
Peters, Jr., Joseph F.
Aeronautics and astronautics
Landing gear
Wheel
244103R, B64C 2532
Patent
active
051040638
ABSTRACT:
A device to induce rotation of aircraft landing wheels is disclosed, using only the force of oncoming air to bring them up to synchronous ground (landing) speed during approach to landing. A complete, independently operating system with its own sensors, microcontroller, motors and control linkages, which does not interface with any of the aircraft's instumentation or systems, continually measures the actual ground speed of the aircraft during final approach, transmitting this flow of data to a microcontroller for continuous translation into required RPM for each tire diameter and monitors the precise RPM of each landing wheel through non-contact photo-tachometers whose outputs are multiplexed into the microcontroller. The system provides continuous control over the RPM of each landing wheel through air intake ducts with servo motor driven inlet vanes gating incoming air to the wheel-mounted impellers. An independent servo control loop for each wheel have their error signal and null point derived, through comparator logic and multiplexing, from the difference between instantaneous wheel RPM and ground-speed-based target RPM.
REFERENCES:
patent: 2320547 (1943-06-01), Tiger
patent: 2338699 (1944-01-01), Wilhoit et al.
patent: 2399218 (1946-04-01), Felburg
patent: 2413924 (1947-01-01), Knox
patent: 2414849 (1947-01-01), Beazley
patent: 2481600 (1949-09-01), Knox
patent: 2665087 (1954-01-01), Clover
patent: 3428274 (1966-09-01), Ellis et al.
patent: 3542318 (1970-11-01), Ellsworth
patent: 3741503 (1973-06-01), Cabeza
patent: 3773283 (1973-11-01), Abplanalp
patent: 3797786 (1974-03-01), House
patent: 3814354 (1974-06-01), Reese
patent: 3850389 (1974-11-01), Dixon
patent: 3866860 (1975-02-01), Opitz, Sr.
patent: 3936016 (1976-03-01), Shiber
patent: 4040582 (1977-08-01), Krauss
patent: 4061294 (1977-12-01), Hawkins
patent: 4205812 (1980-06-01), McSweeney
patent: 4244513 (1981-01-01), Fayer et al.
patent: 4305025 (1981-12-01), Arnold
patent: 4383665 (1983-05-01), Maclean et al.
patent: 4385739 (1983-05-01), Soderberg
patent: 4491288 (1985-01-01), Sinclair
patent: 4615498 (1986-10-01), Ochiai
patent: 4659039 (1987-04-01), Valdes
patent: 4659040 (1987-04-01), Sinclair
patent: 4732350 (1988-03-01), Lamont
Airplane Accessory Kit No. AAK 78-5A description sheet, undated.
"Wheel-Nose Conversion Kit" advertisement in Aerospace and Defense International Product News, May/Jun. 1990.
Ellis Christopher P.
Peters Jr. Joseph F.
LandOfFree
Aircraft landing gear prerotation system does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Aircraft landing gear prerotation system, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Aircraft landing gear prerotation system will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-2343831