u.k. sailor
Veteran
Location: cambs uk
| Given that the blade holders are pulled outwards by centrifugal force I doubt that what is seen on the hub is an issue.
As we know vibration is a killer, and If! that is the underlying cause of a failure a better or different bolt is only likely to delay that failure not prevent it.
In Jan henseleits instructions he advises the use of plastic tail blades because he says the carbon ones can Vibrate on a precision tail system causeing failure.
Please note his tail has TWO radial bearings.
Aditionaly he instructs the bolt which holds the assembly together be changed (despite the plastic blades) if the tail blades have hit the ground in other than the most minor of ways, or failure is possible.
I have stripped my tail down as part of the winter overhaul, and found both radial bearings and the pitch slider bearings to be notchy, how this occured i'm not sure but I dont think the bearing quality is an issue as they are I believe high quality.
The model had shown some vibration late in the year, but the TT seemed okay, and I think the rough bearings are probably the culprits.
If high frequency vibration was present then I would expect a failure at some point in time, regardless of the bolts used, or whether there was a second radial bearing in the system.
I will be changing out all the bearings and fitting new bolts, as the old ones have already been living in this enviroment.
I have been running 105 carbon tail blades and will continue to do so on this model.
Food for thought perhaps |
