Quote Originally Posted by David McKinney View Post
The Dyna-Four apparently had two single-cylinder 500cc Lawrence aircraft-auxiliary engines mounted back-to-back. I saw it race once or twice around 1963 or '64 (in dark blue), and believe it was in the Bay of Plenty area a couple of years after that, but haven't heard of it since.

I took these photos at scrutineering for the first Pukekohe GP meeting
This photo was taken at a Pukekohe CC hillclimb at Ararimu Road, Paparimu around 1964-65. Not sure what colour it was then, or who drove it.



The car's origins seem to be several years earlier. At the NZ Championship Sprint at Aka Aka(Eastern Drain Road?) run on 19 November 1960, Eric Watt set a NZ Class G (751-1100cc) record for the Standing Kilo in a Dynafour Special of 34.62 sec. Not particularly fast, the 500 cc cars of Jeffares and Learnan were a second or two faster, but obviously faster the the existing class record.

Does anyone know who built it or when?

Stu