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  2. 6 Balance Exercises for Seniors That Will Keep You Loose and ...

    www.aol.com/6-balance-exercises-seniors-keep...

    “The main reason many people have balance problems when they get older is because our senses tend to decline as we age,” explains Sabrena Jo, a personal trainer certified in working with ...

  3. A 10-Minute Aerobic Workout to Help Seniors Improve ... - AOL

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    Inactivity as you get older can lead to decreases in strength, balance, and mobility. Here are 5 multi-plane exercises to help combat this. ... The Benefits of an Aerobic Workout for Senior Cyclists.

  4. Engine balance - Wikipedia

    en.wikipedia.org/wiki/Engine_balance

    Excessive hammer blow from high slipping speeds was a cause of kinked rails with new North American 4–6–4s and 4–8–4s that followed the 1934 A.A.R. recommendation to balance 40% of the reciprocating weight. [8] Out-of-balance inertia forces in the wheel can cause different vertical oscillations depending on the track stiffness.

  5. Variable-pitch propeller (aeronautics) - Wikipedia

    en.wikipedia.org/wiki/Variable-pitch_propeller...

    When an aircraft is stationary with the propeller spinning (in calm air), the relative wind vector for each propeller blade is from the side. However, as the aircraft starts to move forward, the relative wind vector comes increasingly from the front. The propeller blade pitch must be increased to maintain optimum angle of attack to the relative ...

  6. Aircraft fuel system - Wikipedia

    en.wikipedia.org/wiki/Aircraft_fuel_system

    This imposes limitations on the amount of fuel carried and the order in which fuel must be used. Turbine engines burn fuel faster than reciprocating engines do. Because fuel needs to be injected in to a combustor, the injection system of a turbine aircraft must provide fuel at higher pressure and flow compared to that for a piston engine aircraft.

  7. Thrust reversal - Wikipedia

    en.wikipedia.org/wiki/Thrust_reversal

    Thrust reversal, also called reverse thrust, is the temporary diversion of an aircraft engine's thrust for it to act against the forward travel of the aircraft, providing deceleration. Thrust reverser systems are featured on many jet aircraft to help slow down just after touch-down, reducing wear on the brakes and enabling shorter landing ...

  8. V speeds - Wikipedia

    en.wikipedia.org/wiki/V_speeds

    Used instead of V R (in discussions of the takeoff performance of military aircraft) to denote rotation speed in conjunction with the term V ref (refusal speed). [19] V Ref: Landing reference speed or threshold crossing speed. [7] [8] [9] Must be at least 1.3 V S 0. Must be at least V MC for reciprocating-engine aircraft, or 1.05 V MC for ...

  9. Why do airlines need to weigh passengers? - AOL

    www.aol.com/why-airlines-weigh-passengers...

    In May 2023, Air New Zealand announced a similar scheme, asking around 10,000 passengers to step onto the scales as part of an initiative ensure “the safe and efficient operation of the aircraft”.

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