RE: SER1 Lake Payne Engineering Workshop

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Alan,

I am looking at the instructions for assembling a Hamilton Standard constant
speed propeller of similar vintage. The accuracy of assembly and loads that
are met by the fittings are enormous. I am much impressed by the way
stretching of the components when running has to be allowed for in the
assembly process with typical selective assembly and shim tolerances of 1/2
to 2 and 1/2 thou. Static balance needing to be within 3 ounce inches on a
fourteen foot diameter prop is also an astonishing target!

Nick. 
 
-----Original Message-----
From: series1-host@xxxxxxxxx.xxx [mailto:series1-host@xxxxxxxxx.xxx] On
Behalf Of Allan Harding
Sent: 09 January 2005 22:08
To: series1@xxxxxxxxx.xxx
Subject: Re: SER1 Lake Payne Engineering Workshop

    Re odd number of threads on the nut, in this case five start, I am 
at the moment making tools for dismantling the propellor of a certain 
type of famous British WWII fighter, the castellated nut for retaining 
the blades in the constant speed unit (hub) has 17 castellations. Only 
the British would think of such a number. Features like this would have 
really got under the aversaries skin if they had had to work on them if 
things had turned out differntly.
    Cheers
    Allan
    Canberra, Australia


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