...I have seen the Lift Reserve Indicator correctly indicate decreasing reserve with increasing angle of attack due to a heavier load, due to high density altitude, and due to increased angle of bank in a turn...I can not agree more...in regards to the need for a stall warning device on all Aerostars! I have found the instrument [LRI] to be extremely valuable in keeping me out of trouble in low level circling approaches, in allowing me to come over the numbers with just the right amount of kinetic energy to land the plane without either excessive energy and the possibility of an over-run, or not enough energy and a hard "stalled-in" landing from 5 feet in the air.
Recently, when one engine was misfiring soon after taking off, it warned me that I was flying too slowly and was approaching a stall. Would I have noticed this on the airspeed indicator with all else that was going on at that time? I don't know! I cannot emphasize enough the extra margin of safety I'm flying with by virtue of having the Lift Reserve Indicator on board.
The Aviation Consumer, which at times has been accused of knocking various products, thinks so highly of the Lift Reserve Indicator that it has one permanently installed in its own corporate aircraft. Until somebody comes up with a conventional stall warning indicator, there is no other alternative than this unit. My advice to every Aerostar owner is to "get one".