Plywood Reinforcements - Wood Structures

[Kyle Boatright]

I know I have a reference that gives guidelines on the appropriate ratio(s)
to taper plywood reinforcements (on wooden spars and the like) to avoid
stress concenrations, but I can't put my hands on it.

Can someone either point me to an on-line resource or go over the relevant
guidelines? My recollection is that you should taper doublers at an 8:1 or
better ratio.

[[email protected]]

On Feb 2, 4:32 pm, "Kyle Boatright" > wrote:

> Can someone either point me to an on-line resource or go over the relevant
> guidelines? My recollection is that you should taper doublers at an 8:1 or
> better ratio.

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Dear Kyle,

AC43.13-1B, page 1.3, shows 5:1

-R.S.Hoover

[Kyle Boatright]

> wrote in message
...
> On Feb 2, 4:32 pm, "Kyle Boatright" > wrote:
>
>> Can someone either point me to an on-line resource or go over the
>> relevant
>> guidelines? My recollection is that you should taper doublers at an 8:1
>> or
>> better ratio.
>
> ------------------------------------------------------------------------
>
> Dear Kyle,
>
> AC43.13-1B, page 1.3, shows 5:1
>
> -R.S.Hoover

I'll dig out my copy. While it is a great reference, it doesn't read as
well as some of the others (Tony Bingelis work and a few other EAA pub's
come to mind)...

Thanks,

Kyle