| 摘要 |
A substantially flat fronted vehicle 10 such as a truck is provided with adjustable air deflector blades 24A-24D. The air deflector blades 24A-24D provide upper 24A 24C and lower 24B 24D air deflector blades vertically mounted above one another and providing a gap (32 see fig 3) around the windscreen (18 see fig 3). The air deflector blades 24A-24D are arcuate sheets and each is supported by support arms 26 comprising vertically hinged connected spring loaded arms (36, 40 see fig 6) that are urged to spring open but are held a selected angle and distance from the vehicle 10 front face 22 by wire rope length selection means and are thus adjusted to promote aerodynamic drag minimization. Use on rail vehicles is also included. The apparatus can also reduce forward vehicle aerodynamic drag in the presence of crosswinds. |
