Eagler's Nest

Airframes => Single Seaters => XL => Topic started by: Ray on February 16, 2021, 10:56:50 AM

Title: Spar web plywood
Post by: Ray on February 16, 2021, 10:56:50 AM

Ray here, getting setup to cut spar webs. The plywood I have is three ply 1/8 poplar 8' long with aircraft stamp. I want to scarf the joints but with three plies not sure how strong the joint will turn out.
I noticed in the forum where others used plywood with 5 plies. The question here will three plies be strong enough?
Thanks
Ray

Title: Re: Spar web plywood
Post by: Chuck in Indiana on February 16, 2021, 02:37:04 PM

Hi, Ray.. a properly done scarf joint is as strong as the original material.

Title: Re: Spar web plywood
Post by: Ray on February 16, 2021, 08:03:04 PM

Thanks Chuck

Title: Re: Spar web plywood
Post by: Dan_ on February 16, 2021, 08:03:38 PM

Reading on plywood... http://eaavintage.org/tech-tip-aircraft-plywood/ (http://eaavintage.org/tech-tip-aircraft-plywood/)

Reading on scarfs...  https://www.google.com/search?client=firefox-b-1-d&q=scarfing+aircraft+plywood (https://www.google.com/search?client=firefox-b-1-d&q=scarfing+aircraft+plywood)

Title: Re: Spar web plywood
Post by: Ray on February 17, 2021, 09:41:04 AM

Dan, thank you good information