It's done. 204 km/h

[Ub Hauled]

Come on Steve, don't be such a whiner :)
You know as well as I do that it's not official until it's don in "lights"...
the GPS can be the most accurate thing in the world and still would not be official.
I am not taking credit away from Achim, tip of my hat to him! That guy knows his stuff... all I trying to convey is that there is a possibility that the GPS could be a bit off, like my spec boat went 99mph...

So there ya have....the Offshore experts have made claim that none of this means anything. GPS is incorrect and we have no idea how fast the boat ran. Maybe they put the GPS in a car right before the boat or something.

I now know why Joerg has left the building.

Maybe the time shoots in the IMPBA and NAMBA are all wrong as well. I was not there to measure them. (smile)

LOL
Steve

[Jeff Wohlt]

This one is pretty good as well.

http://www.techdirt.com/articles/20080718/1234331725.shtml

Again I am not doubting anyone or any equipment. Just somethig we should all know before we continue bragging about speeds with a small low poered hanheld unit under a cover in a hull with 50+volts and freq going every direction from the ESC, cells and motor noise.

Hell mine will not even get good signals under a few trees for hiking!

[crabstick]

dont hate, Appreciate!!

[Gerwin Brommer]

If a handheld GPS isn't good enough for measuring the right SPEED, because it can be
a few % off, what speed wil it display if the boat isn't running ???
Somewhere between -1 ml/h and 1 ml/h ???

The boat is on open water, clear blue sky. Receiving data from up to even 7 or 8 or more
satelites. IMO such a device is accurate enough.

What counts for me is : as far as I know, this man has by far the fastest electric catamaran.
The hull wasn't specifically designed for that purpose.
It's a very narrow hull, lightweight, "scale" .
That's why it's an extreme achievement, IMO.

[Ub Hauled]

Gerwin... OFF COURSE HE IS THE FASTEST CAT around (no pun intended).. that's not even the question.
I believe that the Foretrex 201 I believe locks up to 5 or 6
satellites, and apparently clear days are not the best as far as signal goes, not that it matters.
What I was trying to say is that the record it's unofficial and he should run again on a sanctioned speed trial. Can he go 200+km/h? absolutely!
I am not trying to take anything away from him, on the contrary, I think it's a great achievement.

If a handheld GPS isn't good enough for measuring the right SPEED, because it can be
a few % off, what speed wil it display if the boat isn't running ???
Somewhere between -1 ml/h and 1 ml/h ???

The boat is on open water, clear blue sky. Receiving data from up to even 7 or 8 or more
satelites. IMO such a device is accurate enough.

What counts for me is : as far as I know, this man has by far the fastest electric catamaran.
The hull wasn't specifically designed for that purpose.
It's a very narrow hull, lightweight, "scale" .
That's why it's an extreme achievement, IMO.

[Jeff Wohlt]

That was all I was meaning as well. Hell I know the boys over there can do it. They set the fastest for speed record when here.

I just wanted you all to understand that a 5 second run can be tricky with GPS. HEck for all we know he did 130 and it recorded less.

[EPower]

This one is pretty good as well.

http://www.techdirt.com/articles/20080718/1234331725.shtml

Again I am not doubting anyone or any equipment. Just somethig we should all know before we continue bragging about speeds with a small low poered hanheld unit under a cover in a hull with 50+volts and freq going every direction from the ESC, cells and motor noise.

Hell mine will not even get good signals under a few trees for hiking!

LOL

[EPower]

If a handheld GPS isn't good enough for measuring the right SPEED, because it can be
a few % off, what speed wil it display if the boat isn't running ???
Somewhere between -1 ml/h and 1 ml/h ???

The boat is on open water, clear blue sky. Receiving data from up to even 7 or 8 or more
satelites. IMO such a device is accurate enough.

What counts for me is : as far as I know, this man has by far the fastest electric catamaran.
The hull wasn't specifically designed for that purpose.
It's a very narrow hull, lightweight, "scale" .
That's why it's an extreme achievement, IMO.

Well said Gerwin

[Jeff Wohlt]

I know, I read that one and just started laughing.

[Gerwin Brommer]

Can't wait to see what happens when Achim finishes his HPR 185 Mystic !

[bwells]

I was under the impression that a GPS unit needs only 3 satellites to function and that it maybe off by 1 to 3 % max. Either way, that boat is fast and a video would be nice! P.S. What does IMO stand for?

[crabstick]

imo = in my opinion

[Mel279]

How accurate is the speed gun such as bushnell compare using h/h GPS?since I see no one mention it.

[bwells]

crabstick, Thanks

[Apples1]

This is what i know from AMPBA forum.

Info & pics here - http://www.neumotors.com/Site/Boat_motors.html




last weekend Achim Kurrecks ran his HPR 135 cat for the first time on a nice and wide lake. He ran a twin setup of your 2215/1Y on 10s1p LiPo each. The boat reached a GPS measured top speed of 204 kph = 126.8mph and ran pretty solid. The motors were cold, they are fan and water cooled. This is the first time a RC model cat ran over 200 kph, a goal quite some guys here in Germany were shooting for.

Similar situation on a Q sport hydro (6s1p LiPo) and a 1527/1D, but just fan cooled. The boat reached 165kph = 102.5mph easily and the motor temp did not increase at all - it looked like the motor did not participate in the run.

You build some awesome motors.