Category Archives: IOM

The Winds That Blew in 2023

A fellow member at my mid-week Club carefully records the winds each time he sails.

(Note to Self : “do the same”….)

The results of his journal, including Club Racing and Open Meetings, are pretty interesting:-

Total number of days attempted to race  ……………………. 146 
Total number of days abandoned due to lack of wind ……….3 
Number of days sailed with a A rig…………………………………..101 
Number of days sailed with a B rig…………………………………….14 
Number of days sailed with a C rig……………………………………..26 
Number of days sailed with a D rig………………………………………2

“This means a smaller rig was used 30% of the time. What is interesting is that the C rig was used more than the B rig, almost twice as much. I have a theory, and the figures would seem to support it, that the winds nowadays are such that it’s a case of all or nothing. I also think, and again this is only my opinion, the step from an A rig to a B rig is too small but the step from an A to a C is better. So if you are looking for a new rig to complement your A rig to enable you to sail more and enjoy the blows, perhaps your choice should be a C rig.”

My thanks to Roy o’D, of Chipstead RSC, for this intriguing analysis.

“Antenna Frame” Anyone??

When I read up about my transmitter’s working range, of course it’s all about airplanes and drones. “1.5km range”, I think it said.

Honestly, if the boat is further away than about 150m, frankly we’re on the limits of my eyesight! I’m sure most folks would pay no attention to the layout of the onboard antenna (two wires that stick out of the onboard receiver). I’d forgive anybody who thought it doesn’t really matter. I did notice though that when we initially rigged my new IOM at the Datchet club, the first thing PH told me to do was walk a really long way away and see if I could waggle the sails via the mainsheet joystick. The “voice of experience”, I suddenly thought to myself.

Did you know, the theory is that the two antenna wires should lie at right angles to each other?? The IOM I had been borrowing from a totally amazing man at Chipstead had this simple idea.

Aboard my new K2, the builder has integrated something into his proprietary pot that ties the antenna at right angles. Very neat actually, … job done.

For the F6 Marblehead, GH suggested looking at two potential antenna frames on the Sailsetc website. We chose this one….

You might miss it at first glance. The frame is that little black moulding at the top of the photo. The two “arms” at right-angles are hollow – you can thread the wires inside them easily. It weighs about the same as a sheet of Kleenex. I’d guess its is 3D printed. Very neat. It simply sits inside the pot and grips the edge. It is shaped for the standard 60mm Sailsetc “pot” that the majority of us have. You thread the antenna wires through the 90 degree “V”… then what? I just wound my antenna tails around the pot rather than thread them back over the frame. It keeps it jolly tidy in there, plus at least some of the wires’ length lies at 90 degrees.

https://www.sailsetc2.com/index.php/aerial-arc.html