Hi there T 28d
The engine and prop are pretty much exactly the same as a cerokee 6 300, so would have the same 'torsional vibration' due to the identical 'set up' of the 'rotating elements'.
Whilst every installation has its own idiosycracies, all the blade seperations that i am aware of had a severe stone damage nick in a similar, clearly critical, area of the blade. Such damage, if left unrectified, is quite likely to alllow progressive propagation of cracking and then, surprise surprise, partial blade separation Some operators seem to get very little stone damage, others more, seemingly independant of the surfaces that they opeate on. Poor operating procedures and lack of attention to prop condition can be bring such issues on.
Whilst the vibration mode of the prop, which is dependant on many
considerations, and varies for different combinations, is a not insignificant
factor, do you honestly believe that the same engine prop configuration, which
has been around for about 40 years now, would have got through certification
and then production and use without someone noticing the props falling off for
no apparent reason?
Hi Brian,
You may not be aware that the Gippsland seats comply with the stringent requirements of FAR23.562 that require dynamic (sled) testing. This takes into account airframe deformation, offset impact, head impact path and impact score, seat belt peak loads and a maximum allowable spinal compression load. Cessna seats do not. Whilst some complain pilots complain about the seat comfort, others are just fine with it, though i believe that the factory is attemping to improve the comfort to increase the 'happy' numbers. On blue water ferry i have done 16 hour legs, single pilot , no AP, and not been too traumatized. Any seat will make you a bit stiff after that length of time.
Anyone that has been involved in an accident in a GA8 seem quite satisfied with the seats, as they have saved several lives so far. Seats from antiquated aircraft designs (cessna 100 series falls into this category) have been known to contribute to occupant injuries in an accident, and even to cause accidents on their own accord.
HD