More than 20 years ago, Ovington BoatS got for me a Grand Prix Sailing video tape (probably 1995 season), with AAMI, Ella Bache, and others.
In the video, you can see Julian Bethwaite making his own carbon fabric, using quite large stripes (around 10 cm wide) of carbon UD at 90°...
As he was a great asset of ETNZ it might be a great loss for them. In addition to his sailing talents, Glenn is also gifted by an incredible ability to make good decisions, and if in a former message I mentioned "He is preparing another PhD" I had good reason for that:
In 2007 or 2008, sailing...
Internet has been a great mean to spread knowledge worldwide, the best evidence is this work paper from 2007.
If anybody see some similarity with some UAV used in the Ukrainian battlefield it is probably not fortuitous...
Thankx for considering the idea, so let me disclose the hidden idea behind the "idea"
I guess there is mould for Tornado carbon mast which are not put at full use at the moment, and I was wondering if a 20 to 21 feet sportboat with "skiffy design" & equiped with such a mast would make a...
Thanks for the ratios LIT, anyway, it is probably wise to consider a bracket instead of a single point, and with a spead-sheet, it is not much extra work, and your figures will be very useful. By the way I am very positively surprised by the 2.5 ratio, I would not have dare to go that far...
Happy New Year Everybody,
Hope the following question is not totally off-topic
Is there any thread comparing the skiff rig vs other rig concept including teardrop rotative masts like beach cats?
Thank you very much for the figures LIT,
So far, I used to rely on my foil lift calculations, and the boat speed I got as a minimum required to achieve foiling, was around 6.5 m/s.
Windward I used to assume the boat speed =1x True wind speed
and downwind I used to assume boat speed<=2x True...
It seems that there is little information available regarding A-Cat polar.
I think it could be helpful to gather information on a dedicated thread.
So whatever is your experience with a floater or a foiler, do not hesitate to post.
There are 2 points which deserve special...
Build-in prebend is like a lever at the top and it is very helpful to have the mast being bend in the longitudinal axis (bigger inertia), especially for the part above the hound.
Another interesting feature appears if you look at the mast from the top, then imagine a lateral flexion to leeward...
Very sad to learn that, Tom has been a CFD teacher for many of us with great patience and a great sense of pedagogy.
Any SA initiative to maintain his website tspeer.com could be the best hommage our community could "rig" for his memory.
You are right Mischa from DNA Catamaran was not the first one to sail a decksweeper, in Australia in the 70's or 80's a big Nacra (probably 25 feet beachcat) had already a stepped sweeping main like Moth today
In Multihull Magazine in the80's The Goodall Brothers experimented a...
It is a good idea, as SA has been a place of innovation in the past ie:
The decksweeper main sail has been mentionned here as early as 2011 (2 years before ETNZ closed the gap in 2013) and 4 years before Mischa made one for his A-Cat in 2015 for the Nederland National
It was in a thread brought...