Sailing: Emirates Team NZ returned to break own landspeed record at Lake Gairdner

Four months after Emirates Team NZ celebrated their new wind-powered landspeed world record, they've revealed they've broken it again.

Adding amost three kilometres per hour to their top speed, the team have kept their achievement underwraps until now and there could be plenty more where that came from.

What began as a childhood dream for world-renowned sailor Glenn Ashby Is now a reality for the America's Cup holders, thanks to a specialist team of personnel, who built the craft Horonuku from scratch.

Less than 10 months later, they'd broken the record not once, but twice - announced during the Land of Speed documentary premiere in Auckland - surpassing December's mark with just over 225.5kph in an attempt that almost didn't happen.

"We actually went back to Lake Gairdner, basically to pack the craft up at the end of our operating window, but our meteorologist identified a really little weather window for us about a week before we had to pack up," said Ashby. "That intensified and we actually used that weather window, and went back and broke our own record." 

Accomplishing the remarkable feat meet plenty of obstacles and resistance, in the form of logistics and Mother Nature.  

"Those wind opportunities that came through, they were few and far between, and when they did come through, having a wet surface really did make things quite difficult," said Ashby. "The operational window for both attempts was really only for an hour to an hour-and-a-half."

Ashby is not ruling out another attempt - this time on the water - in the hope of reaching speeds of about 100 knots or 185 kph.

"I think in the future, a waterspeed record would be something that would be in Team New Zealand's  wheelhouse, so we're definitely not going to count that one out."

If their latest feat is anything to go by, almost nothing can slow them down.