Here at Hercules Propellers, we believe in our products. In aviation structural strength is everything, and unknowns simply aren’t acceptable.
In the event of an engine failure in an aeroplane, you have options. Chances are you will get the machine down onto the ground in one piece and walk away, albeit a bit sweaty. In the event of a propeller failure (i.e. a blade separation where the propeller actually breaks and you lose a big chunk of it, usually a whole blade), your chances of survival are remote – massive imbalances suddenly imposed on the engine lead to huge vibration and in some cases the engine mounts can fail, leaving you in an unrecoverable situation.
Because the structural integrity of our products is so critical, we have developed an in-house wood strength testing process, that measures both the bending strength and the brittleness of the wood we use – thus proving just how sound the materials are. We utilise this process in several ways: batch checking of standard species, strength analysis of new species for use and comparative strength testing of upcycled Mahogany (to make sure it really is still strong enough for purpose).
We will at some point in the near future be opening up and offering our testing services to enable aircraft builders and other manufacturers to carry out structural strength testing of wood samples for their own projects – just enquire for a costing!
Bend testing – Young’s Modulus of rigidity
Brittleness testing – mode of rupture