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atg

Member Since 12 Oct 2009
Offline Last Active Mar 02 2014 10:23 PM
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Posts I've Made

In Topic: WaterTribe Everglades Challenge Multihulls (Class 5)

02 March 2014 - 10:25 PM

I don't know how old Smyth is at this point, but he gets full marks for seamanship, and pure balls. Gotta love a guy who ventures miles offshore, in the dark, on a 165lb pivoting ama tri with a 25' rig and amas made from Home Depot blue foam, only to capsize, lose an ama, right the boat, salvage all parts, and sail back to shore on two hulls for breakfast. And then bring the same boat back to lead overall wire to (nearly) wire the next year. From 2013:

 

http://watertribe.or...sew-ec2013-saga


In Topic: A Cat Worlds 2014 Takapuna

13 February 2014 - 08:52 PM

To quote Anders Peterson (slightly out of context), these things look like gas lamps in the age of electricity.

 

I look at those videos and think "Oh how quaint - the catamarans are trying to figure out how to foil...downwind". How 1950s. Except even Monitor had active control on the rudder...

 

Either open the door and get something interesting and manageable on there, or close it. If foiling upwind is not in the design brief, it is probably not the sort of "advance" the A-class should wish to be associated with.


In Topic: Definitive Foil Control Article

17 December 2013 - 08:19 PM

It is a pretty big failure if ETNZ had the idea but never even thought to ask the MC whether it would be legal. This would be a lesson for their team moving forward. They must have thought that there was no chance whatsoever that such a system would be approved.

In Topic: Definitive Foil Control Article

17 December 2013 - 01:07 AM

Deano on Oracle's foil control, from the RNZ interview via scuttlebutt:
Oracle's electronic foil setting and its legality

'We had looked at the option, but within the rules we didnt think it was legal (to use the same type of foiling control device as Oracle ). These are very complex systems. There is a real grey area with stored power and manual power. We viewed the system they had in place as not being legal, but in the end it was cleared by the measurers and we had to abide by their decision. We werent happy about their decision, but we werent able to do anything about it.

'In the process of the last month before the Americas Cup, there was a lot going on. The Oracle cheating scandal the Jury were dealing with that and the Measurers tied up in that as well.

'So it was hard to be as fully focused on some of the other issues that we would have liked dealt with in a better way. But in the end you have to go and race. We felt we had led all the way from launching in July 2012, first to foil and master all the techniques that go with that and the other teams were playing catch up all the way. And unfortunately for us, in the end it was just two weeks too late. Oracle were able to watch everything we were doing and then with the resource they had were able to try and develop and get we were and then improve on that.

In Topic: Definitive Foil Control Article

16 December 2013 - 06:33 AM

But as the valve and the actuator (the board actually) are mechanically connected together (moving body actuator) you will have this feedback automatically. That is how moving body actuators works. If the actuator goes out of selected position it will automatically go back to its original position as soon as the pressure is there. Okay, normally the actuator and the valve is one assembly and not separate units as here but it does not change any thing. If the actuator moves from its selected position due to the "compressible fluid" it will go to the selected position again.

 

Yes, we all understand how it works. At least I do, I think. It is an elegant system.

 

In any case, you are making my point quite well: any mechanism automatically returning a valve to a closed position after the valve is opened cannot possibly be a manual control mechanism, any more than ABS brakes on a car can be considered fully manual.

 

I suppose in the end that ETNZ should have pushed the interpretation of the Rule harder in this area, as Oracle did.