> My help would be to tell you to start running away from that welded
flange.
> For sure, don't stand in front of it.
>
> Ron Freiberger
> mailto: rfreiber...@swfla.rr.com
Hi Ron and others
Firstly, thanks to those of you that responded to my query about the
conversion manual. So far only two replies!
I have no intensions of ever flying behind one of these welded hubs or three
blade props, but I
am very interested in the fact that the taper on the crank was considdered
adequate to transfer motor power/torque. As I am planning on building a
longer than usual prop hub extension for a cleaner looking cowling. This
extension will be supported by an external bearing housed in an aluminuim
fabrication bolted to the four protrusions around the crankshaft. I don,t
doubt that the taper as is would eventually fail due to fatigue from
handling gyroscopic loads imposed by the prop without any external support
but what I would like to know is would the standard taper handle the torque
loads produced by the motor disregarding all other forces.
Is there a formulae for working out what torque load a particular taper of a
particular length with a particular loading by a securing bolt in the centre
can handle without failing? Any of you engineers willing to
tackle this one? From the two replies so far there is no mention of the
crankshaft/prop hub junction failing, only the welded part and the prop
itself of which I will be using neither.
I know this is tedious for some of you but please bear with me guys, after
all this is why they call it experimental.
