11. For additional protection, he invented a system consisting of aerodynamic brakes on the blade tips . 12. This blade design improves aerodynamic efficiency at the blade tip and reduces the acoustic signature. 13. Bell immediately fitted the two-bladed rotor with tapered blade tip caps for the company's own independent testing. 14. They spin grass blades and feed inside the spiral spinning, causing whitening of the grass blade tip . 15. The test equipment measures the force at the instant the blade tip produces a sustained slash through the vest. 16. If a crack is present pressure is lost and a red indicator on the rotor blade tip was tripped. 17. The leaves are lanceolate, erect-spreading, sometimes falcate, with full margins, to cut up against the blade tip , with emerging veining. 18. By increasing the rotor diameter with an additional modular segment that is applied over the blade tip , yield grows significantly. 19. This implies a higher high-pressure shaft speed, to maintain the datum blade tip Mach number on the rear compressor stage. 20. The leaf rib is cut in the upper part, emerging from the back as a short spike from the blade tip .
