Wood/composite prop bolt torque

[ELIPPSE]

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 .

[Stealth Pilot]

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

[[email protected]]

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.

[jls]

> 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.

[Sparkle]

wrote:

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

All of the graphics are missing.

[[email protected]]

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

[GeorgeB]

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

[[email protected]]

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