Re: Lift Reserve Indicator
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jmattson wrote:Morning everyone, could someone explain the pros to having a LRI? What does it do that an airspeed indicator won't? Is there maybe a website to look at that will explain everything? Maybe a past post that I missed? Forgive me, I'm new to this particular instrument... Thanks guys!
A LRI is just another type of angle of attack instrument (mostly). The difference between what an AoA meter does and what an airspeed instrument does is significant. Aircraft fly on the wing and the wing performs in accordance with its angle of attack. A wing always stalls at the same AoA...no matter what gross weight or how many Gs its pulling. Same for best rate of climb, best glide, etc...always at the same AoA.
An ASI shows the published stall speed only in one particular condition...at a specific gross weight and at 1 G. If you are loaded heavy the stall will occur at a higher airspeed, if you are pulling Gs the stall will occur at a higher airspeed. So in effect the ASI is a lousy way to avoid stalling if you are trying to fly at the edge of the envelope.
Navy pilots fly all carrier approaches using AoA guidance only...they never use the airspeed indicator.