Excellent video. Most notable is how directionally stable the 670 is as it comes down the front of a wave at an angle on a following sea - no evidence of broaching. Impressive!
I have a variation hull form. It's essentially an asymmetrical hull with a wider, more open bow like a symmetrical. A hybrid, if you like. It is quite simple to do, that I can't believe it has not been done before. I been developing this hull as a sailing cat. But have realised it might have merit in adaptation to powercats such as this. If you are interested.
Power catamarans have the defect of lurching to an angle right or left depending on which side's forefoot slams into the wave first. This one does that but perhaps not too badly.
Yeap, you do tend to get it a tiny bit but it still beats the smashing and slamming you tend to get from other boat models. Everything in a boat is compromise ;)
@@KingfisherBoatsNZ the new hull design I've developed addresses this issue on asymmetrical designs. Designers have had a try at developing a hull as this, calling their design a hybrid of the twin vee and full asymmetrical. But they haven't managed to come close to this new hull form. Also it does require a huge change to any asymmetrical design. It involves one small key change. I'd like to share it it with you if you are interested. Cheers
Hey mate, thanks for the questions. They handle bar crossings fantastically and with a following sea they handle great. These boats require around 350mm to float and a little more when the outboards are trimmed down. These Powercats have a lot of positive buoyancy so they don't require much water to float.
Trimming the motors would also add to a slightly more comfortable &better ride ! I have the 5m. Kingfisher & enjoy playing @ withe the outboard trim to obtain the best ride .... these alloy Cats can take a good pounding ! T
Excellent video. Most notable is how directionally stable the 670 is as it comes down the front of a wave at an angle on a following sea - no evidence of broaching. Impressive!
Amazing team ! I would love to see you do the same for the 450 series !
We'll get some footage shot at some point :D
I have a variation hull form. It's essentially an asymmetrical hull with a wider, more open bow like a symmetrical. A hybrid, if you like. It is quite simple to do, that I can't believe it has not been done before. I been developing this hull as a sailing cat. But have realised it might have merit in adaptation to powercats such as this. If you are interested.
Power catamarans have the defect of lurching to an angle right or left depending on which side's forefoot slams into the wave first. This one does that but perhaps not too badly.
Yeap, you do tend to get it a tiny bit but it still beats the smashing and slamming you tend to get from other boat models. Everything in a boat is compromise ;)
@@KingfisherBoatsNZ the new hull design I've developed addresses this issue on asymmetrical designs. Designers have had a try at developing a hull as this, calling their design a hybrid of the twin vee and full asymmetrical. But they haven't managed to come close to this new hull form.
Also it does require a huge change to any asymmetrical design. It involves one small key change. I'd like to share it it with you if you are interested. Cheers
How much water is required to float these if beach launching? Also how do they handle crossing a bar inbound with a decent following sea?
Hey mate, thanks for the questions. They handle bar crossings fantastically and with a following sea they handle great. These boats require around 350mm to float and a little more when the outboards are trimmed down. These Powercats have a lot of positive buoyancy so they don't require much water to float.
Runs great at a angle to the sea following or head on boom town
Trimming the motors would also add to a slightly more comfortable &better ride ! I have the 5m. Kingfisher & enjoy playing @ withe the outboard trim to obtain the best ride .... these alloy Cats can take a good pounding !
T
Hello! And yes, trimming the motors makes a big difference to the ride :)
Have you tested it with 4 passengers and heaps of fishing gear? And full fuel?
Hi! Yes, we have - that's a common scenario.