2018/3/11 Wheel Base-B 园上清大华 Parameters for Taildragger Landing Gear 国上清大学 ·Main criteria -To prevent side tip 2hbu Side slipfriction coefficient B2 Va-Wu 4=0.85 -Constrained by wing structure or fuselage diameter o r nd 0171 Soor an0 Tire Sizing 国上清文大些 Tire Selection 圆上洋式美大李 Tires are sized to carry the weight of the aircraft Tires are selected based on sizing results from -Main tires carry about 85%-92%of aircraft weight manufacture's catalogue Nose tires carry the rest of static load but are subject to higher dynamic loads during landing Main wheels sizing table Ma (Max长LoaL=W兰 A Mf Mi Load-w管 W-Weight on Whed Nose tires can be assumed to be about 6o-100%of the size of the main tires rAer 8oa6o0e四k-a88 Tire Pressure and Tire Contact Area 圈上洋天通大学 Shock Absorbers 图上活大坐 Load carried by internal pressure Tires are very limited in absorbing shock caused by a bad landing Methods:solid spring to Oleo shock absorber Ww-PA A,=23网（得-R 南 令9在号共 42018/3/11 4 © Shanghai Jiao Tong University – Dr. Wenbin Song School of Aeronautics and Astronautics, 2017-2018 Wheel Base－ B • Main criteria – To prevent side tip – Constrained by wing structure or fuselage diameter Side slip friction coefficient © Shanghai Jiao Tong University – Dr. Wenbin Song School of Aeronautics and Astronautics, 2017-2018 Parameters for Taildragger Landing Gear © Shanghai Jiao Tong University – Dr. Wenbin Song School of Aeronautics and Astronautics, 2017-2018 Tire Sizing • Tires are sized to carry the weight of the aircraft – Main tires carry about 85%-92% of aircraft weight – Nose tires carry the rest of static load but are subject to higher dynamic loads during landing Main wheels sizing table Nose tires can be assumed to be about 60-100% of the size of the main tires © Shanghai Jiao Tong University – Dr. Wenbin Song School of Aeronautics and Astronautics, 2017-2018 Tire Selection • Tires are selected based on sizing results from manufacture’s catalogue Na Nf Ma Mf H B © Shanghai Jiao Tong University – Dr. Wenbin Song School of Aeronautics and Astronautics, 2017-2018 Tire Pressure and Tire Contact Area • Load carried by internal pressure Ap Rr © Shanghai Jiao Tong University – Dr. Wenbin Song School of Aeronautics and Astronautics, 2017-2018 Shock Absorbers • Tires are very limited in absorbing shock caused by a bad landing • Methods: solid spring to Oleo shock absorber