Originally Posted by ed4353
What is the wingspan of a Dirty Birdy 20?
If your are refering to the DB 20 at the Trenton site I uploaded that particular plan to the site. It's wingspane is 49"
As mentioned Bridi never made a 20 sized Dirty Birdy. That particular plan was scaled down from the 60 Sized DB.
I orginally scaled it down to see if the root cord of the wing was similar to the Tweedy Bird 20 as the Tweedy Bird plans do not have rib templates. I wanted to see if the scaled down rib templates would work for both.
On my plan of the Treedy Bird the given wingspan is lsited at 48 3/4" but measured 49" in photoshop. So I scaled down the DB 60 to at least match the wingspan of the Tweedy Bird.
As you will see the from the attached plan the Tweedy Bird was designed by Joe Bridi and was marketed through Great Planes.
I included the DB 20 as well.