Here's the Barnaby Wainfan design Planarian 14gram Bostonian free flight model airplane. This design conforms to the Acadamy of Model Aeronautics rules for the Bostonian event that call out restrictions for wingspan, length and a require a particular volume for the fuselage. You can learn more about the Bostonian rules at the AMA website noted below. A fun, good flying design.

https://www.modelaircraft.org/

And here's a link to the original article and plan: https://library.modelaviation.com/art...