![]() ![]() Propellers deserve a little more respect. And yet, most of the time we just give the prop a light caress during our preflight inspection and say “Yep, it’s still there.” ![]() If the engine departs the airframe, the airplane becomes uncontrollable due to the shift in CG. Catastrophic propeller failure immediately produces severe vibration as the engine continues to run with an out-of-balance prop, and the resulting stresses can lead to failure of the engine mount. Under continual stress while absorbing engine power and converting it into thrust, the lowly propeller has to keep performing its function, year in and year out, witha scant attention paid to it. Propellers, like wing spars, are among the few parts on an airplane that absolutely, positively, must not ever break.
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