johnshannon's blog View Details
Archive for May, 2021
Posted by johnshannon | May 09, 2021 @ 05:10 PM | 2,716 Views
This is the long-form of my journey of the K&B 15RS (aka Wart, aka Racing Schnürle). First, I must acknowledge my friends without whom this project would have been impossible. Luke Roy (of Rattler fame) provided invaluable data. He has an original barstock case and sleeve from the prototype phase plus one of the investment case cases that came after the 15RS. This provided the details of the sleeve porting and case transfer shapes. Luke also reverse-engineered the stroke based on the cylinder bore. Bill Hughes contributed detail photos (aka Mug Shots) of Glenn Lee’s engine used at the 1964 F2A WCs. Additionally, he provided certain critical dimensions and important information like the engine used a K&B 15R rod. Darron Black (aka “Boy Wonder” because he reminds Dub and me too much of ourselves at his age) is a friend of Dub and mine that provided invaluable support for me learning Autodesk Fusion 360 and identifying Shapeways as a source of 3D printing directly in aluminum. Bill Wisniewski, of course, is the designer of the of the K&B 15RS and provided critical information about its design and development in personal conversations. And last, but not least, is Dub Jett, my life-long flying partner and friend who supported my efforts with his excellent advice. As the Beatles’ song says “I get by with a little help from my friends”!

The precursor of the K&B 15RS is the developmental prototype engine by Bill Wisniewski used to incorporate schnürle porting into...Continue Reading