October 2018 web.pub

The final stage was the development of the modern tuned pipe engine. This is attributed to Bill Wisniewski in model engines, though the design appeared in motor cycle engines earlier. Bill and Roger Theobald developed Schnuerle porting in two TWA (Theobald Wisniewski Association) “wart’ engines. The first, which won the 1964 F2A World Championships, was not piped. The second won in 1966. It ran a tuned pipe and revolutionized speed engines. There, the McCoy 60 developed an edge over the Dooling 61. In the 29 class several new engines made a showing. Both McCoy and Dooling made smaller versions of their 60 engines. They were both ringed piston designs. Fox tried an iron piston and steel sleeve design in their 29R. It developed around .82 hp at 17,500 rpm. The K&B 29R series 64 was the last of the cross flow scavenged designs, also with an iron piston. It developed around 1.02 hp at 19,000 rpm. These were the engines of the 1950s and early 1960s. The final step was the Schnuerle scavenged, tuned pipe engine. PROPWASH 14 October 2018 Dooling 29 Dooling 29 disassembled McCoy 29 Fox 29R K & B 29R