k2

K2 tow test – Nov 22

11/22/11

Today we towed K2 around the bay to test new logger updates. We hoped also to try our new 50 sqm high-aspect-ratio kite, but the wind was too low. Damon’s father-in-law joined us on the Protector. Joe and Vincent also tried out brand-new drysuits, and Gabe’s father visited the shop.

from Jamie:
For the first time on K2, we are now recording the kitearm angle and the rudder pitch angle. We are particularly interested in relating the rudder pitch to the boat speed, since this is an important manual adjustment that could be automated in the future. Currently, the helmsman must adjust the pitch of the rudder to keep the boat level as the boat speed changes. An example […more]

K2 test with 30 sqm kite – Nov 4

11/4/11

A short test today, our first with the new kitearm. Not a lot of wind, but we did get up on foils and get some pull on the kitearm, which worked well under those conditions. We tested the kitearm in the shop prior to taking it out (see previous post) to ensure that there was no danger of it breaking under high kite loads.

Kai View Data:
20111104-k2-30m-kiteArm.kai.bz2

K2 test no mast – Oct 26

10/27/11

We went out a second time with the 30 sqm kite and boat designer David Alan Williams. For the first time, we removed the launching mast before sailing to reduce wind drag. We’re now discussing ways to eliminate using the mast altogether.
We again ran into Johnny on the water. Two of Richard’s friends joined us for the test. Prior to using the kite, we towed the boat (see previous post by Jamie). Thanks Dudu for taking photos!

Kai View Data:
20111026-k2-30m.kai.bz2

K2 test with 30 sqm kite – Oct 25

10/26/11

Boat designer David Alan Williams is here for several days to consult with us on K2 design. Today was the first day of his trip, and we took K2 out for a tow test and to fly the new 30 sqm kite. Ann accompanied him and Don and Joe on the tow test, and David, Joe, and Richard took turns with Don for the kite test. The new kite worked well, as did the boat, although the wind/kite were insufficient for us to foil well. Before the test, Jamie completed the electronic ride-height controls on the tiller so it is now possible to adjust all three foils. We saw Johnny Heineken out on the water.

Kai View Data:
[…more]

K2 Tow Test – Oct 26

10/26/11

Yesterday we did a careful tow test of K2, pulling it nearly directly behind the Protector (on a long line to minimize interference from the wake). The kiteboat was towed steadily for one minute at each of a range of speeds. The results are shown in the attached graph.

K2 test 29+ knots – Oct 19

10/19/11

Good test today–we passed the 29-knot mark with three people on board and in 17 knots. We again used the 50 sqm single tube kite. Should have some great video. More tomorrow.

Kai View Data:
20111019-k2-50m.kai.bz2