L'Hydroptere may have broken the speed world record: 51.49 kts over 500m still be be ratified by WSSRC and 47.8 for the mile...

More news here: www.hydroptere.com/

You mean 48.7 for the NM and 50.3 ave for the 500 Its a lots money, big boat V no money, no boat comp. Next stop for them is the outright record

*Subject to ratification from WSSRC

In the last run of the day the L'Hydroptere did 48.8 knot (56.12mph) one nautical mile run with a NEW 500m RECORD of 51.38 knots (59 mph). Peak speed of the day was 55.8 knots(64mph).

thats mental

Mmmmmm......

Big thumbs up to l'Hydroptere for finally cracking it.

However not too sure how long they'll be able to hold onto it: it's been too quiet for too long over on the kiters GPS site with none of the big guns posting sessions for a long, long time,....

... and the occasional one that does get posted by one of the top guys is way below their regular speeds (e.g ~35 knot speeds from a guy who regularly tops 45).

All a bit suspicious really,.....

..... and can't help but wonder if a bit of sandbagging is going on over there.

Ah well, the truth will out when the Luderitz event rolls around.

Bet the boaties will have their fingers crossed while that one's running!

Waterboy you need to look further afield and you'll find some sour grapes from the Luderitz organiser. "Now that would be nice! Between 2 buoys and with video timing! Until kiters can utilise the Trimble GPS's or get small enough 10mhz GPS's we will never be in a position to compare apples with apples, plus "our" advantage is shallow water (increased control chop) and was taken away by this sort of syndicate. Yet, L'Hydroptère and others continue to gain advantages which the WSSRC allow and refuse to share any information with other parties who request it (water depth over the course, beam of craft et cetera... )

Alex Caizergues has a 51.6 500m with a GPS without gates, so the fight is on, just wish others involved were happy to define sailing and then go at it with gloves off to get the greatest speeds possible!
"

Roo is right. It is not exactly a level playing field when everyone else has to run over a set 500m course hoping to get a good gust at the right angle whilst L'Hydroptere can set the course around a good gust and whatever angle they sail to get the best out of it.

Still it must have been quite a rush.

i guess people zipping about in a foot of water behind a sandbank after waiting for ideal conditions isn't exactly realistic and not likely to advance mankinds technology much, but a boat that can do it in real world conditions with technology that can be passed to commercial ships is probably of much more use.

I'd like to think this was their "hidden agenda" but it probably isn't

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yoyo said...

Roo is right. It is not exactly a level playing field when everyone else has to run over a set 500m course hoping to get a good gust at the right angle whilst L'Hydroptere can set the course around a good gust and whatever angle they sail to get the best out of it.

Still it must have been quite a rush.

That is a disadvantage for the Kite guys but remember that MI has been doing the same for years. In fact it was the MI syndicate that got the GPS Trimble method approved by the WSSRC.

It seems the Kite guys have gone over to GPS anyhow ...

Video here
www.sail-world.com/USA

Imagine if something went wrong and it nose dived at that speed - those crew would be catapulted for miles.

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easty said...

Imagine if something went wrong and it nose dived at that speed - those crew would be catapulted for miles.

No theywon't be catapulted, they have a tensioned stainless steel cable balustrade to catch them - just like when someone [read idiot] wants to stop motorbike riders by stringing wire across the track.

Gutsy effort to sit astride that behemoth at 50knots too.

Do you reckon that's the 51 knot run in the video?

It doesn't look like it's blowing anywhere near 28 knots there to me, more like 15-18, though the angle from the chopper can be deceptive.

Looks like l'Hydroptere's stirred up the kiters by breaking the record: only 5 days after l'Hydroptere did it's thing, Sebastian Cattelan knocked out a 52 knot 5 x 10 average.

Apparently he was just "gettin ready for the event....".

Only (??!!???) a 49-and-a-bit knot 500m in that particular session, but hey I guess he doesn't want to peak his form too early eh?

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easty said...

Video here
www.sail-world.com/USA

Imagine if something went wrong and it nose dived at that speed - those crew would be catapulted for miles.

They actually crashed the entire thing last year, no one got hurt afaik.

Hydropteres 500m speed according to the flash speed vs time ticker on their web site. Reminds me of the stepped results from Garmin foretrexs. In several places the speed accelerates and later decelerates by over 2 knots between 2 measurements on a 10 hertz recording (ie. in a 1/10 of a second).

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yoyo said...

...... In several places the speed accelerates and later decelerates by over 2 knots between 2 measurements on a 10 hertz recording (ie. in a 1/10 of a second).

Bit dubious you reckon?

'Sic the TimeKeepers from GP3S on 'em!

Doesn't inspire a great deal of confidence does it, can't see how that can be real.

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decrepit said...

Doesn't inspire a great deal of confidence does it, can't see how that can be real.

It can't be if that is truly the real data. I am assuming that this is approximately 18 seconds of running which makes each step around a second (approx 10 gps points). They should not look like that. There should be a much smoother curve. Even if you took the centre of each step and made a curve to fit there would be a surprising amount of variation for such a large mass of craft.

Just clearing up some earlier comments I posted, they were the opinion of the Luderitz organiser not mine. It should have read:

Waterboy you need to look further afield and you'll find some sour grapes from the Luderitz organiser.
Luderitz organiser: "Now that would be nice! Between 2 buoys and with video timing! Until kiters can utilise the Trimble GPS's or get small enough 10mhz GPS's we will never be in a position to compare apples with apples, plus "our" advantage is shallow water (increased control chop) and was taken away by this sort of syndicate. Yet, L'Hydroptère and others continue to gain advantages which the WSSRC allow and refuse to share any information with other parties who request it (water depth over the course, beam of craft et cetera... ) Alex Caizergues has a 51.6 500m with a GPS without gates, so the fight is on, just wish others involved were happy to define sailing and then go at it with gloves off to get the greatest speeds possible!

Also before we start looking for a smoking gun the data you see for speed is instaneous speed based off trackpoints. The 500 m run is calculated on 500 m distance covered between two trackpoints that are accurate to 10 cm after post processing to survey grade levels of accuracy not an accumulation of instaneous speed readings. So it would take Hydroptere 18.92 seconds to cover the 500 m distance between 2 points as shown in the time along the x axis. Whereas the GT-31 measures speed over time Hydroptere is measuring speed over distance, a distinct difference. Just to clear up Alex's 51.6 500m time is an accumulated measurement from instaneous speeds rather than a measurement between 2 measured points 10 cm accuracy.

If it looks like an artifact, quacks like an artifact...

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Roo said...
The 500 m run is calculated on 500 m distance covered between two trackpoints that are accurate to 10 cm after post processing to survey grade levels of accuracy not an accumulation of instaneous speed readings. So it would take Hydroptere 18.92 seconds to cover the 500 m distance between 2 points as shown in the time along the x axis.

Sounds very fair AND accurate to me.
Love a good survey!

Roo is right of course.

As they (Hydroptere web site) said themselves it is a "reconstruction" of the run and as Roo pointed out their record is calculated by time vs distance (18.92 sec over 500m) and not a summation of 1/10 sec speed/velocity points.

They probably did themselves a disservice putting up a "reconstruction" but I guess the Trimble data would not have ment much.

Still I wish someone had a Navi onboard so we could compare it to windsurf and kitesurf (and Sailrocket, MI) records tracks.

Dave

Yoyo how about 30 hz 3 axis accelerometer compared with 1 hz GPS. Here ya go, chew on this one. It's taken from some straightline comparisons and constant circle tests you can find the file here: http://www.ka72.com/GPSDownloads/305825dfe3ec4f959191a194ed352851/ROO%203_832000346_20090920_154157_DLG.SBP

Is that from the Uni of Kentucky?

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yoyo said...

Is that from the Uni of Kentucky?

No. it's from the Uni of Roo! Just finalised the 10 hz GPS binary data that gives full 3d speed. Next project to overlay the 30 hz 3 axis accelerometer data with the 10 hz gps data.

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Roo said...

.....the data you see for speed is instaneous speed based off trackpoints. The 500 m run is calculated on 500 m distance covered between two trackpoints that are accurate to 10 cm after post processing to survey grade levels of accuracy not an accumulation of instaneous speed readings. So it would take Hydroptere 18.92 seconds to cover the 500 m distance between 2 points as shown in the time along the x axis. Whereas the GT-31 measures speed over time Hydroptere is measuring speed over distance, a distinct difference. Just to clear up Alex's 51.6 500m time is an accumulated measurement from instantaneous speeds rather than a measurement between 2 measured points 10 cm accuracy.

You assumed meaning into my post that was not there. I know well how they calculate the WSSRC speed from Trimble data.
BUT, if that really is raw trackpoint data from the Trimble unit (which I doubt from it's obviously erroneous appearance) than it would cast a huge question mark over their claims.
Of course, an easy way to calm any doubt about these matters would be for the syndicate and the WSSRC to publish the data for all to see. I think that was one of the Luderitz organisers main points.

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sailquik said...


.....
BUT, if that really is raw trackpoint data from the Trimble unit (which I doubt from it's obviously erroneous appearance) than it would cast a huge question mark over their claims.
Of course, an easy way to calm any doubt about these matters would be for the syndicate and the WSSRC to publish the data for all to see. I think that was one of the Luderitz organisers main points.

Make that two of us: if someone wants to be granted a record that is accepted by the public, then I think it's only reasonable they release their evidence of achieving that record to the public for scrutiny.

Shouldn't the RAW data be made available to the public straight away?

And once they've completed their post-processing, should not only the post-processed data be released, but the method used to perform the post-processing?

If not, why not?

It's probably all legit, but no harm in checking eh?

It's now official.
www.sailspeedrecords.com/index.php?option=com_content&view=article&id=104:wssr-newsletter-no-177-hydroptere-world-records-230909&catid=2:news&Itemid=5

how did they work out the current variation? 0.08knots?...anyone..