Hi agree it was the only one built. During the WW2 the 2 Packard engines destined for this boat went down with the transport ship in the Atlantic. When tested she was not fast enough and was then transferred to Scotland and used for training purposes.
The original plans for this boat had her with a typical rubber band drive as used in model aircraft and was drawn up for Drysdale Boat drawings, based in Leighton Buzzard.
Later incorporated into The Model Boat book published in 1950. IMHO it is still one of the best books of this type I have read.
The number 1228 is from the original plans for this boat. I started building this model many years ago and then found it should have had 2 engines and I set the basic uncovered hull aside, still in the garage.
The Model Maker magazine when it started took over these plans, which were excellent ones, my favourite is the River cruiser Dubarry. But there were 3 other high speed launch type boats as well as examples of many other models Jetex to sail. This model being MM102.
The plan in 1950 was for sale at 15/- (fifteen shillings later 75p) Todays equivalent value 72 years on is £30.00. So perhaps Sarik's plans are not a bad deal!
I have a second copy of the book if anyone is interested, just PM me It was 7/6d at the time I would like the 2022 equivalent!