Standard Naming Convention for Aircraft Landing Gear Configurations

5300.7 October 6, 2005 Typical Aircraft F-14, F15 Beech 1900 B-737, P3 (C-9) C-130 C-17 B757, KC135, C141 L1011, DC-10 A340-600 B-747, (E-4) B-777 An-124 An-225 A380 C-5 B-52 HS-121 Trident IL-76 Information S T DOD Flight ST TT TT TRT TDT DDT SBTT Navy Designation ST TT DT STT TRT DTT DDT TDT SBTT Navy Name U.S. NAVY Designations Single Tricycle Dual Tricycle Single Tandem Tricycle Triple Tandem Dual Tandem Tricycle Single Belly Twin Tandem Double Dual Tandem Twin Delta Tandem Twin Twin Tricycle NOSE GEAR Single Wheel Dual wheel Single Wheel Dual wheel Dual wheel Dual wheel Dual wheel Dual wheel Dual wheel Dual wheel Dual wheel 4 across 4 across Dual wheel 4 across No Nose Gear - single outrigger Air Force Name Single, Tricycle Single, Tricycle Twin, Tricycle Twin, Tricycle Single, Tandem Tricycle Twin-Tandem, Tricycle Twin-Tandem, Tricycle Twin-Tandem, Tricycle Twin-Tandem, Tricycle Twin-Delta- Tandem, Tricycle Twin-Twin, Bicycle Air Force Types J E L F A B C D H K G U.S. Air Force Designations Designation S S T T Air Force T-T S-TA T-TA T-TA T-TA TR-TA T-D-TA Excluding Nose 2 2 4 4 4 8 8 8 Total # Wheels, 12 10 12 16 12 20 28 20 24 16 # Belly Gear 1 1 2 2 Belly Gear DT DT DW TDT Main Gear DT DT SW SW DT DT DT DW DW TDT FAA Name Historic FAA Designations Table 3. Proposed Naming Convention with Historical FAA, U.S. Air Force, and U.S. Navy Nomenclatures Single Wheel Single Wheel Dual wheel Dual wheel Single Tandem Dual Tandem Dual tandem Dual Tandem Double Dual Tandem Triple dual Tandem Reference Figure 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 E NOMENCLATUR S S D D Q 2S 2T 2D 3D 5D 7D C5 D2 Q2 PROPOSED 2D/D1 2D/2D1 2D/2D2 2D/3D2 October 6, 2005 5300.7 Triple Single Dual Quadruple S D T Q 2 Duals in 2 Singles in 2 Quadruples 2 Triples in Tandem Tandem in Tandem Tandem 2D 2S 2Q 2T 3 Duals in 3 Singles in 3 Quadruples 3 Triples in Tandem Tandem in Tandem Tandem 3D 3S Figure 2. Generic Gear Configurations. Increase numeric value for additional tandem axles.

5300.7 October 6, 2005 Figure 3. S - Single Wheel Main Gear with Figure 4. S - Single Wheel Main Gear with Single Wheel Nose Gear Dual Wheel Nose Gear Figure 5. D - Dual Wheel Main Gear with Figure 6. D - Dual Wheel Main Gear with Single Wheel Nose Gear Dual Wheel Nose Gear Figure 7. 2S - Two Single Wheels in Tandem Figure 8. 2T - Two Triple wheels in Tandem Main Gear with Dual Wheel Nose Gear, Main Gear with Dual Wheel Nose Gear, Lockheed C-130 Boeing C-17 October 6, 2005 5300.7 Figure 9. 2D - Two Dual Wheels in T andem Main Gear with Dual Wheel Nose Gear Figure 10. 2D/D1 - Two Dual Wheels in Tandem Main Gear/Dual Wheel Body Gear with Dual Wheel Nose Gear, McDonnell Douglas DC-10, Lockheed L-1011 Figure 11. 2D/2D1 Two Dual Wheels in Tandem Main Gear/Two Dual Wheels in Tandem Body Gear with Dual Wheel Nose Gear, Airbus A340-600 Figure 12. 2D/2D2 - Two Dual Wheels in Tandem Main Gear/Two Dual Wheels in Tandem Body Gear with Dual Wheel Nose Gear, Boeing B-747 Figure 13. 3D - Three Dual Wheels in Tandem Main Gear with Dual Wheel Nose Gear, Boeing B-777 5300.7 October 6, 2005 Figure 15. 7D - Seven Dual Wheels in Figure 14. 5D - Five Dual Wheels in Tandem Tandem Main Gear with Quadruple Nose Main Gear with Quadruple Nose Gear, Gear, Antonov AN-225 Antonov AN-124 Figure 17. C5 - Complex Gear Comprised of Figure 16. 2D/3D2 - Two Dual Wheels in Dual Wheel and Quadruple Wheel Tandem Main Gear/Three Dual Wheels in Combination with Quadruple Wheel Nose Tandem Body Gear with Dual wheel Nose Gear, Lockheed C5 Galaxy Gear, Airbus A380

October 6, 2005 5300.7 Figure 18. D2 - Dual Wheel Gear Two Struts Figure 19. Q - Quadruple Wheel Main Gear per Side Main Gear with No Separate Nose with Dual Wheel Nose Gear, Hawker Gear (note that single wheel outriggers are Siddeley HS-121 Trident ignored), Boeing B-52 Bomber Figure 20. Q2 - Quadruple Wheels Two Struts per Side with Quadruple Nose Gear, Ilyushin IL-76 David L. Bennett Director of Airport Safety and Standards