ETNZ To Attempt Wind Powered Land Speed Word Record

shebeen

Super Anarchist
also. question from the back bench here.

going ~130knots in 20knots of wind!

as the apparent wind is essentially on the nose, does true wind direction still matter much?
I'm sure this has been well explored in iceboating
 

Tropical Madness

Super Anarchist
Damn they're close. i think the final number from ETNZ will depend on breakages and their appetite to stay in camp - theyve been there a few months.

I reckon 229kmh will be the new record - a good 13% up on the previous:)
 

Sailbydate

Super Anarchist
11,797
3,393
Kohimarama
also. question from the back bench here.

going ~130knots in 20knots of wind!

as the apparent wind is essentially on the nose, does true wind direction still matter much?
I'm sure this has been well explored in iceboating
Still going to go faster down wind.
 

JALhazmat

Super Anarchist
4,385
1,673
Southampton
this bit does confuse me a little bit. breaking a windspeed record in just gusting 20-25knots seems odd. (In contrast the windspeed merchants in Luderitz, Namibia are hanging on to their 6sqm windsurf rigs on skinny boards in with wind gusts over 40kts.)

They need to go (for argument's sake) 220km for 3 seconds. That requires about 200m of race track. obviously huge amounts required for speed up, run down etc.

surely there are a 100 places that have the surface, angles and wind that this could have been done then? as such a sparse country there must be some airports that fit the criteria

why pick the one that had a chance of being under water if the wind requirement was so low, or was that not simulated?
Questioning the event location isn’t allowed the devotees of the church Dalton will come for you..

oh and the windsurf thing? Water is sticky basically, plus they are very keen to stay using what looks like traditional windsurf gear rather than a more extreme interpretation.
 

barfy

Super Anarchist
5,110
1,396
Damn they're close. i think the final number from ETNZ will depend on breakages and their appetite to stay in camp - theyve been there a few months.

I reckon 229kmh will be the new record - a good 13% up on the previous:)
I'm not sure the entire team has been hanging out fasting on roos the entire time. It's possibly a good logistical location, quick flight from Auckland, not many tourists, looked like a nice shed to store kit in.
 

peterivanac

Member
318
15
this bit does confuse me a little bit. breaking a windspeed record in just gusting 20-25knots seems odd. (In contrast the windspeed merchants in Luderitz, Namibia are hanging on to their 6sqm windsurf rigs on skinny boards in with wind gusts over 40kts.)

They need to go (for argument's sake) 220km for 3 seconds. That requires about 200m of race track. obviously huge amounts required for speed up, run down etc.

surely there are a 100 places that have the surface, angles and wind that this could have been done then? as such a sparse country there must be some airports that fit the criteria

why pick the one that had a chance of being under water if the wind requirement was so low, or was that not simulated?
-Surface drag matters.
-They sail an long oval, not a straight line.
- I think TNZ probably know what they are doing.
 

shebeen

Super Anarchist
I thought it looked windier on the video so I checked. This is the official record report http://www.nalsa.org/MeasuremantReport/MeasuremantReport.html and it was indeed stronger. I wonder how often those conditions exist?

Sailing Conditions: The wind direction was northwest at speeds at 30 to 40 mph with a peak gust of 47 mph recorded by Dennis. This allowed Richard to make good use of the long axis of the lake. He chose to stop sailing for maximum speed after clearly achieving a new record in order to minimize the risk of breaking the boat. Runs made after 11:05 were mostly for the purpose of getting better video footage. On one of those runs he came within a few mph of eclipsing the old record again.
So just coming back to this from the first page. Record was broken in 26-35kts, with a 47mph gust = ~41knots.

ETNZ basically equalled the record in conditions of reportedly half that speed(quarter the force).

I really wonder if they expected to be doing so well in relatively "light conditions".
 
So just coming back to this from the first page. Record was broken in 26-35kts, with a 47mph gust = ~41knots.

ETNZ basically equalled the record in conditions of reportedly half that speed(quarter the force).

I really wonder if they expected to be doing so well in relatively "light conditions".
Greenbird might look the same, but it was smaller and lighter and built with a different philosophy in mind. take advantage of the gusts. Horonuku is heavy and much larger and builds and builds and builds speed. It just needs a consistent wind.
 

lex1233

New member
20
8
Iv been thing about this for a few weeks and glens comments of going thew the gears has me thinking again. The wing looks like a solid wing but given the technology they have for they’re foil flaps , could the wing actually be adjustable. The join where the tail spar Is looks solid but maybe the top half can twist ? Just a thought.
 

Sidecar

…………………………
3,236
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Tasmania
I'm not sure the entire team has been hanging out fasting on roos the entire time. It's possibly a good logistical location, quick flight from Auckland, not many tourists, looked like a nice shed to store kit in.
FIFO maybe?

“Mt Ive has a very good 2 strip airport that is Kincaid capable. All the accommodation will have been booked out a year ago. It will be camping only. The only access to the lake for speed week is via Mt I've. The lake is about 30 km from the homestead, so you will be hitching rides. Speed week gets over 1000 people, so the resources of MtIve are heavily taxed.”

And another reason, apart from lack of wind, why they didn’t try in March.

 

cyclone

Super Anarchist
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Maine
Iv been thing about this for a few weeks and glens comments of going thew the gears has me thinking again. The wing looks like a solid wing but given the technology they have for they’re foil flaps , could the wing actually be adjustable. The join where the tail spar Is looks solid but maybe the top half can twist ? Just a thought.
This design looks solid
2AD7DE4B-423A-4749-9E1F-7C6687508100.jpeg
 

Kiwing

Super Anarchist
3,506
585
Bay of Islands
The wing looks symmetrical but maybe it is not? The whole craft is not symmetrical?
Changing gears might be changing the shape of the whole wing?
 
it actually looks like he is trying his best to keep the outrigger wheel as unweighted and floaty as possible as often as possible.
Intuitively most skippers will turn toward the rising AMA to bring it down, only those who race beach cats and fast foilers will know to turn away.

Try that at 100mph and make it look easy takes some pilotage.
 




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