GB2193932A - Tyres for aircraft landing gear - Google Patents
Tyres for aircraft landing gear Download PDFInfo
- Publication number
- GB2193932A GB2193932A GB08619845A GB8619845A GB2193932A GB 2193932 A GB2193932 A GB 2193932A GB 08619845 A GB08619845 A GB 08619845A GB 8619845 A GB8619845 A GB 8619845A GB 2193932 A GB2193932 A GB 2193932A
- Authority
- GB
- United Kingdom
- Prior art keywords
- tyre
- wheel
- pockets
- aircraft
- tyres
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Withdrawn
Links
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B64—AIRCRAFT; AVIATION; COSMONAUTICS
- B64C—AEROPLANES; HELICOPTERS
- B64C25/00—Alighting gear
- B64C25/32—Alighting gear characterised by elements which contact the ground or similar surface
- B64C25/40—Alighting gear characterised by elements which contact the ground or similar surface the elements being rotated before touch-down
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60C—VEHICLE TYRES; TYRE INFLATION; TYRE CHANGING; CONNECTING VALVES TO INFLATABLE ELASTIC BODIES IN GENERAL; DEVICES OR ARRANGEMENTS RELATED TO TYRES
- B60C13/00—Tyre sidewalls; Protecting, decorating, marking, or the like, thereof
- B60C13/02—Arrangement of grooves or ribs
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60C—VEHICLE TYRES; TYRE INFLATION; TYRE CHANGING; CONNECTING VALVES TO INFLATABLE ELASTIC BODIES IN GENERAL; DEVICES OR ARRANGEMENTS RELATED TO TYRES
- B60C2200/00—Tyres specially adapted for particular applications
- B60C2200/02—Tyres specially adapted for particular applications for aircrafts
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Aviation & Aerospace Engineering (AREA)
- Tires In General (AREA)
- Heating, Cooling, Or Curing Plastics Or The Like In General (AREA)
Abstract
A tyre 1 which is suitable for an aircraft wheel has formations in the form of pockets 2 on both sides thereof. The pockets 2 have open ends 4 which catch air passing the wheel so as to offer resistance to the flow of air and thereby cause the wheel to rotate. The pockets may be replaced by solid protrusions. <IMAGE>
Description
SPECIFICATION
Tyres for aircraft landing gear
This invention relates to tyres for aircraft landing gear.
Tyres of aircraft landing gear are subjected to considerable wear and tear during landing of the aircraft. Immediately prior to landing, the wheels of the landing gear are not rotating and hence, when the tyres of the wheels make contact with the runway, the wheels are suddenly forced to rotate by virtue of frictional forces between the runway and the tyres.
Due to the considerable speed differential between the runway and the wheels at the point of landing, the tyres tend to slip on the runway surface for a time after the tyres make contact with the runway. This slippage causes considerable wear on the tyres and leads to the tyres having to be replaced relatively regularly. This problem exists in the landing gear of light aircraft as well as large commercial aircrafts.
It is an aim of the present invention to provide a tyre, for aircraft landing gear, which is constructed so that the aforesaid problem is alleviated.
According to the present invention there is provided a tyre for a wheel of an aircraft, wherein the tyre has formations thereon for offering resistance to air passing the tyre as the aircraft lands, which resistance is as such as to cause the wheel to rotate.
Embodiments of the present invention are advantageous in that they can cause the wheel of an aircraft to rotate before contact between the tyre and the runway is made thereby reducing slippage between the tyre and the runway.
In a preferred embodiment of the present invention, the formations are in the form of pockets on one or both sides of the tyre.
Preferably, the pockets are formed of vulcanised rubber and are integral with the tyre.
Alternatively, the formations may be solid, for example, they may be in the form of chevron shaped ribs on one or both sides of the tyre. The ribs are formed so that they are directed in the same direction around the periphery of the tyre thus offering a differential in air resistance between the top and bottom of the wheel so that air passing the wheel forces the wheel to rotate.
The invention will now be further described by way of example, with reference to the accompanying drawings in which like reference numerals designate like elements, in which:
Figure 1 shows a side view of a tyre embodying the present invention;
Figure 2 shows a plan view of the tyre of figure 1; and
Figure 3 shows a side view of a second embodiment of the present invention.
Figure 1 shows a side view of a tyre 1 which is suitable for a wheel of the landing gear of an aircraft (not shown). The tyre 1 has formations in the form of pockets 2 on both sides. The pockets 2 are integrally formed with the tyre 1 and are made of the same material as the tyre 1. This material may be vulcanised rubber.
When the landing gear is down and the aircraft is coming in to land, the whole of the wheel and aircraft is moving in the direction of an arrow A with respect to the ground 3.
Movement of the aircraft gives rise to a considerable flow of air past the tyre in the direction designated by arrows B. As can be seen from figure 1, the pockets 2 have an open end 4 which catches air passing the wheel so as to offer resistance to the flow of air. The pockets 2 taper in the direction shown in figure 1 and all of the pockets 2 on the tyre are directed in the same direction along the periphery of the tyre 1. Consequently, greater resistance is offered by the pockets 2 which are towards the bottom of the tyre 1 since the open ends of the pockets 2 face towards the flow of air. At the top of the wheel the tapered ends of the pockets 2 face towards the direction of the flow of air and so less resistance is offered. The resulting differential in resistance offered to the flow of air past the tyre 1 causes the wheel and the tyre 1 to rotate in the direction of arrow C.
The rotation of the wheel and tyre 1 in direction C, results in less slippage between the tyre 1 and the ground 3 when the tyre makes contact with the ground 3. Consequently, the amount of wear on the tyre is reduced.
Figure 2 shows a plan view of the tyre of figure 1. The distance which the pockets 2 project from the sides of the tyre 1 can be varied in order to increase or decrease the resistance, thus enabling variation of the degree to which the wheel is caused to rotate.
Figure 3 shows a second embodiment of the present invention in which the formations on the tyre 1 are in the form of chevron shaped ribs 5. Again the orientation the ribs 5 is such that greater resistance is offered by the tyre to air passing the tyre 1 in the region closest to the ground 3. The tyre 1 is therefore caused to rotate and in a similar manner to that described with reference to figure 1.
The height and profile of the ribs height may be varied in order to increase or decrease the degree to which the wheel and tyre 1 is caused to rotate in the direction C for a given air speed.
It is to be understood that modifications may be made to either of the embodiments described above without departing from the scope of the present invention, for example, the pockets 4 may be solid. Alternatively, the pockets may be attached to the side of the wheel in a separate manufacturing operation instead of being formed integrally therewith.
Furthermore, the pockets 4 may be of a flexible material which are collapsible when the landing gear is raised into the aircraft but become inflated when the landing gear is down immediately prior to landing.
Claims (7)
1. A tyre for a wheel of an aircraft, wherein the tyre has formations thereon for offering resistance to air passing the tyre of the aircraft and, which resistance is such as to cause the wheel to rotate.
2. A tyre according to claim 1, wherein the formations are in the form of pockets on one or both sides of the tyre.
3. A tyre according to claim 2, wherein the pockets are formed of vulcanised rubber and are integral with the tyre.
4. A tyre according to claim 1 or claim 2, wherein the formations are in the form of solid protrusions.
5. A tyre according to claim 4, wherein the solid protrusions are in the form of chevron shaped ribs on one or both sides of the tyre.
6. A tyre according to claim 5, wherein the chevron shaped ribs are formed so that they are directed in the same direction around the periphery of the tyre thus offering a differential in air resistance between the top and the bottom of the wheel so that air passing the wheel forces the wheel to rotate.
7. A tyre substantially as herein described with reference to Figures 1 and 2 or Figure 3 of-the accompanying drawings.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB08619845A GB2193932A (en) | 1986-08-14 | 1986-08-14 | Tyres for aircraft landing gear |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB08619845A GB2193932A (en) | 1986-08-14 | 1986-08-14 | Tyres for aircraft landing gear |
Publications (2)
Publication Number | Publication Date |
---|---|
GB8619845D0 GB8619845D0 (en) | 1986-09-24 |
GB2193932A true GB2193932A (en) | 1988-02-24 |
Family
ID=10602727
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB08619845A Withdrawn GB2193932A (en) | 1986-08-14 | 1986-08-14 | Tyres for aircraft landing gear |
Country Status (1)
Country | Link |
---|---|
GB (1) | GB2193932A (en) |
Cited By (11)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB2242401A (en) * | 1990-03-29 | 1991-10-02 | Clive Murray Coker | Aircraft wheel and means to reduce tyre wear on landing |
GB2247659A (en) * | 1990-09-10 | 1992-03-11 | Gerard Ian Hamilton | Aircraft wheel with means to rotate it |
US5213285A (en) * | 1992-04-10 | 1993-05-25 | Stanko John J | Rotating aircraft tire/landing gear apparatus |
GB2311264A (en) * | 1996-03-22 | 1997-09-24 | Paul William Toon | Rotating undercarriage wheels prior to landing |
ES2145675A1 (en) * | 1997-05-22 | 2000-07-01 | Espinosa Palacios Juan Antonio | Improvements to tyres used in aircraft landing gear |
GB2352431A (en) * | 1999-07-27 | 2001-01-31 | Norman Evans | Aircraft tyre air scoops for rotating undercarriage wheel |
GB2365393A (en) * | 2000-08-07 | 2002-02-20 | Peter John Ginn | Rotating aircraft wheels prior to landing |
GB2372487A (en) * | 2001-02-21 | 2002-08-28 | Kenneth Harold Newton | Aircraft wheel tyre with vanes for spinning the wheel |
WO2002079032A1 (en) * | 2001-03-29 | 2002-10-10 | Baolu Han | Tyre for aircraft |
JP2008302740A (en) * | 2007-06-05 | 2008-12-18 | Bridgestone Corp | Pneumatic tire |
WO2016131996A1 (en) * | 2015-02-21 | 2016-08-25 | GARCÍA-PUENTE ÁLVAREZ, Diego | Elements for inducing rotational speed of wheels of the undercarriage of aeroplanes |
Citations (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB516738A (en) * | 1938-07-06 | 1940-01-10 | Vickers Aviat Ltd | Improvements in landing wheels for aircraft |
GB562651A (en) * | 1942-12-01 | 1944-07-11 | Arthur Herbert Clark | Improvements in or relating to aircraft landing gear |
US3529792A (en) * | 1968-05-01 | 1970-09-22 | Paul H Macmahon | Pre-rotatable tire |
GB1226325A (en) * | 1967-04-08 | 1971-03-24 | ||
US3741503A (en) * | 1972-04-10 | 1973-06-26 | H Cabeza | Aircraft landing gear |
US4040582A (en) * | 1975-09-09 | 1977-08-09 | Krauss Ronald C | Wind power accessory for a vehicle wheel |
GB2080217A (en) * | 1980-07-26 | 1982-02-03 | Brookes Rex Harward | Improvements in or relating to aircraft undercarriage wheels |
-
1986
- 1986-08-14 GB GB08619845A patent/GB2193932A/en not_active Withdrawn
Patent Citations (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB516738A (en) * | 1938-07-06 | 1940-01-10 | Vickers Aviat Ltd | Improvements in landing wheels for aircraft |
GB562651A (en) * | 1942-12-01 | 1944-07-11 | Arthur Herbert Clark | Improvements in or relating to aircraft landing gear |
GB1226325A (en) * | 1967-04-08 | 1971-03-24 | ||
US3529792A (en) * | 1968-05-01 | 1970-09-22 | Paul H Macmahon | Pre-rotatable tire |
US3741503A (en) * | 1972-04-10 | 1973-06-26 | H Cabeza | Aircraft landing gear |
US4040582A (en) * | 1975-09-09 | 1977-08-09 | Krauss Ronald C | Wind power accessory for a vehicle wheel |
GB2080217A (en) * | 1980-07-26 | 1982-02-03 | Brookes Rex Harward | Improvements in or relating to aircraft undercarriage wheels |
Cited By (11)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB2242401A (en) * | 1990-03-29 | 1991-10-02 | Clive Murray Coker | Aircraft wheel and means to reduce tyre wear on landing |
GB2247659A (en) * | 1990-09-10 | 1992-03-11 | Gerard Ian Hamilton | Aircraft wheel with means to rotate it |
US5213285A (en) * | 1992-04-10 | 1993-05-25 | Stanko John J | Rotating aircraft tire/landing gear apparatus |
GB2311264A (en) * | 1996-03-22 | 1997-09-24 | Paul William Toon | Rotating undercarriage wheels prior to landing |
ES2145675A1 (en) * | 1997-05-22 | 2000-07-01 | Espinosa Palacios Juan Antonio | Improvements to tyres used in aircraft landing gear |
GB2352431A (en) * | 1999-07-27 | 2001-01-31 | Norman Evans | Aircraft tyre air scoops for rotating undercarriage wheel |
GB2365393A (en) * | 2000-08-07 | 2002-02-20 | Peter John Ginn | Rotating aircraft wheels prior to landing |
GB2372487A (en) * | 2001-02-21 | 2002-08-28 | Kenneth Harold Newton | Aircraft wheel tyre with vanes for spinning the wheel |
WO2002079032A1 (en) * | 2001-03-29 | 2002-10-10 | Baolu Han | Tyre for aircraft |
JP2008302740A (en) * | 2007-06-05 | 2008-12-18 | Bridgestone Corp | Pneumatic tire |
WO2016131996A1 (en) * | 2015-02-21 | 2016-08-25 | GARCÍA-PUENTE ÁLVAREZ, Diego | Elements for inducing rotational speed of wheels of the undercarriage of aeroplanes |
Also Published As
Publication number | Publication date |
---|---|
GB8619845D0 (en) | 1986-09-24 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
WAP | Application withdrawn, taken to be withdrawn or refused ** after publication under section 16(1) |