new stuff in the a-class

dogwatch

Super Anarchist
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South Coast, UK
Taken at it's face value and interpreted strictly, Rule 52 makes sailboats impossible.

Everything stretches and bends and thus 'adjusts" itself under load.
That is not what "adjust" means. The word implies intentionality. OED defines it as "arrange, put in order, regulate, harmonise, adapt".
Furthermore the rule doesn't just speak of adjustment. It says "adjusted and operated". Stretching and bending under load is not "adjustment and operation".

 
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RobG

Super Anarchist
2,874
749
would venturi-type vents in the foil (say somewhere on the surface, just back from the LE of the main foil) which vented up the strut at ride height provide a passive (in the context of Rule52) height control?

[...]
Definitely not a new idea though I don't know if it has been tried in the last 5-10 on sailing foilers. I think part of the issue would be response times. Bleeding air takes time and, possibly more importantly, washing off any air introduced to the foil area would also take time. IIRC mothies also report feeling drag when there is air on the foils. It would be a nice mechnism to use in some way though.
It has been thought through by some. If the consequence is anything like ventilation of the strut that occurs from time to time, it leads to instability and hence loss of speed (it's hard to press on at ten–tenths when it feels Neptune is waving the whole boat around by the strut).

I don't think it will work as a continuous fine adjustment as there would be small bursts of ventilation as the holes encounter waves. An advantage of a wand on the bow is that you can see exactly what it's doing so can tell what the flap is up to and sail accordingly.

 

RobG

Super Anarchist
2,874
749
[…]

Furthermore the rule doesn't just speak of adjustment. It says "adjusted and operated". Stretching and bending under load is not "adjustment and operation".
How about a self–tacking jib? It's adjusted by the crew but operated (tacked) by the wind. A Moth wand is adjusted by the sailor but operated by the water.

How about a self–bailer?

 

BalticBandit

Super Anarchist
11,114
2
[…]

Furthermore the rule doesn't just speak of adjustment. It says "adjusted and operated". Stretching and bending under load is not "adjustment and operation".
How about a self–tacking jib? It's adjusted by the crew but operated (tacked) by the wind. A Moth wand is adjusted by the sailor but operated by the water.

How about a self–bailer?
Yup, or a "flexi-tip mast"... or a kite that is designed to "rotate its shoulders to weather" etc. etc. "operate" does not require every little bit be directly controlled. Using that sort of logic the bungee takeups that are used are illegal

 




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