The One Design was created to make a high performance acrobatic aircraft on a low budget. It was designed to get the most out of a O-360 Lycoming motor. The Wiki page has a brief overview of the aircraft at: https://en.wikipedia.org/wiki/Rihn_DR-107_One_Design

YouTube has a bunch of videos on this aircraft, here are a few

This video has a real good 3D cad overview of the structure

You can get the Plans and Materials for the One Design from Aircraft Spruce: https://www.aircraftspruce.com/catalog/kitspages/onedesign.php

The EAA has a few dozen articles that cover this aircraft and they can be found here: https://www.eaa.org/eaa/aircraft-building/kits-and-plans/r—s/rihn-dr-107-and-dr-109

Finished ready to fly examples can be found on Barnstormers for $50K+: https://www.barnstormers.com/category-15896-Aerobatic–One-Design.html

For those looking for an RC version Outerzone has a 72″ span plans from RCM: https://outerzone.co.uk/plan_details.asp?ID=10576