Wood/composite prop bolt torque

For those of you who are concerned about prop bolt torque on non-metal
props, check out this article by Vance Jaqua:
http://www.geocities.com/vjaqua/prpblvl.html .

On 22 Feb 2006 12:34:49 -0800, "ELIPPSE"
wrote:

For those of you who are concerned about prop bolt torque on non-metal
props, check out this article by Vance Jaqua:
http://www.geocities.com/vjaqua/prpblvl.html .

I use an australian article written by one of our propeller
makers.(Bishton)

the aim is for 600psi clamping force or thereabouts.

5/16"dia bolts try 5 - 8 lb ft
3/8"dia bolts try 10 - 13 lb ft
1/2"dia bolts try 18 - 25 lb ft.

yes we use belleville washers.

correctly installed the wooden prop is capable of outlasting the
aircraft.

Stealth Pilot

Is everone getting a proper printout of the recommended article?
Graphs and some text missing?
Help ! (:)) - what do I have to do to get an all inclusive printout.
I have a "regular" computer and have had nothing like this before.

wrote in message
oups.com...
Is everone getting a proper printout of the recommended article?
Graphs and some text missing?
Help ! (:)) - what do I have to do to get an all inclusive printout.
I have a "regular" computer and have had nothing like this before.

Interesting article, belleville washers and all, but one should torque a
W72CK44 Sensenich on a Cub or T-Craft by the book at 200 inch/pounds, plus
or minus 15, and a month or so later re-torque and re-track.

Use mylar half-moons to set the prop track dead nuts.

If your engine is reasonably in balance, you'll fly smooth as silk.

wrote:

Is everone getting a proper printout of the recommended article?
Graphs and some text missing?

All of the graphics are missing.

Stealth Pilot wrote:
On 22 Feb 2006 12:34:49 -0800, "ELIPPSE"
wrote:

For those of you who are concerned about prop bolt torque on non-metal
props, check out this article by Vance Jaqua:
http://www.geocities.com/vjaqua/prpblvl.html .

I use an australian article written by one of our propeller
makers.(Bishton)

the aim is for 600psi clamping force or thereabouts.

5/16"dia bolts try 5 - 8 lb ft
3/8"dia bolts try 10 - 13 lb ft
1/2"dia bolts try 18 - 25 lb ft.

yes we use belleville washers.


Belleville springs. This was a nit with an old engineer with whom I
worked and upon reflection, I agree with him.

Of course a bolt is also a spring, but no one ever talks about
hex-head springs....

--

FF

On 1 Mar 2006 10:37:28 -0800, wrote:

Stealth Pilot wrote:

yes we use belleville washers.


Belleville springs. This was a nit with an old engineer with whom I
worked and upon reflection, I agree with him.

I am not picking nits either, but the Belleville Spring Company says,
and I quote from their website, "Conical shaped disc springs were
first conceived in the mid-1800's and the invention was subsequently
called a Belleville Washer after its inventor Julian Belleville, who
received a patent for the product in 1867."

All the links are for disc SPRING or belleville WASHER.

What is your old engineer's source?

George

GeorgeB wrote:
On 1 Mar 2006 10:37:28 -0800, wrote:

Stealth Pilot wrote:

yes we use belleville washers.


Belleville springs. This was a nit with an old engineer with whom I
worked and upon reflection, I agree with him.

I am not picking nits either, but the Belleville Spring Company says,
and I quote from their website, "Conical shaped disc springs were
first conceived in the mid-1800's and the invention was subsequently
called a Belleville Washer after its inventor Julian Belleville, who
received a patent for the product in 1867."

All the links are for disc SPRING or belleville WASHER.

What is your old engineer's source?

Probably an older engineer.

FWIW, my engineering text (disremember which) called them
springs.

--

FF


George