Help with lightening holes
Hi,
I'm pausing to wait for some opinions on lightening up the front of this Pitts S-1-11B. You can see by the plans that this basic stucture will be covered by formers, longerons, and then sheeted from F4 forward. The gear plate and cabanes are aircraft ply, the forward of F3 doubler is 1/4" balsa. The firewall is 3/8" aircraft ply. When bolted on, the bottom wing provides lots of stiffening with the wide bolt spacing x4.
The four large openings rear of the canopy took out 152 grams.
I could route some more holes or continue per plan and build onwards. Would like some proper thoughts.
Thanks,
Mark