
Turnbuckles and Bottle Screws
A turnbuckle, strictly speaking, has two threads, one right-hand and one left-hand. A bottle screw has one. Most people use the term “turnbuckle” for both.

A turnbuckle, strictly speaking, has two threads, one right-hand and one left-hand. A bottle screw has one. Most people use the term “turnbuckle” for both.

This report doesn't deal with specific rule changes, but it discusses the interesting concept of assigning boats to the Traditional or High Flyer division based on properties of the boat rather than relying strictly on the design year because that is often unknown or murky.


This report discusses more suggested changes to the rule including the use of modern materials and fiberglass hulls. It reviews and discusses nine proposed changes and gives their approval status.

The wave theory described here was attractive to Victorian naval architects because it was fundamentally geometric and could be implemented using the drafting instruments of the time.

This is a short report inviting members to submit rule change proposals.

Moore was a naval architect and this work captures the state of model yacht design in the 1920s.

This report discusses three new suggested changes to the VM rule and gives details on sail measurement and "headboards".

This report discusses the new VM rule based on the 1954 M Class rules. It gives details of the Traditional/High Flyer split around 1945 and discusses the "controversy" over the spade rudders. It also talks about possible changes to the rule and whether there might be meassurement certificates.