Landing Products will discontinue the manufacture of
22 inch and larger diameter gas propellers.
Two reasons compel this decision:
Manufacturing resources need to be refocused on the emerging electric motor market.
Some large diameter single piece propeller failures have been reported in the hub area where predicted factors of safety are believed to be rather high, based on both structural analysis and dynamic impact tests. The reasons for the failures are not adequately understood. We speculate that the failures are probably caused by fatigue induced by unusual resonance responses. The latter is, of course, completely beyond Landing Products control, given the large array of fuselage and engine mount characteristics in use. We do not believe that there is an inherent problem with the large propellers, based on wide spread use over a long time. However, the occasional failure creates a risk to the APC reputation that we are not willing to accept.
We regret the removal of this well accepted product line from our inventory.
The following items are discontinued and are no longer in stock. This includes remaining two and three blade component systems as well.
All 22 inch gas props with pitches higher than 10
All 24 inch gas props
All 26 inch gas props.
In addition the following smaller propellers are no longer available.
