Erwaqn - Well a std CST tube would be 70% UD and 30%DB so just get the mandrel size look at the CST sizing for thickness and the winder should...
Erwan - You are better off buying a tube from CST composites in sydney. They make very good tube at a good price. www.cstcomposites.com but there...
Hi daiquiri - this is why we get thrombosis if we sit down for long periods eg long flights. The heart cannot raise the blood up from our legs. We...
For a general purpose tube don't use 90deg fibres. Only need 0deg and 45deg. Hoop plies fail early and first plus they bridge. Try a 70%UD and...
Leg Pedalling vs Arm pedalling Summary - Two decades ago I used to make bike frames /bikes for the Australian Olympic teams (abled and para...
The CG is 16.35m from the mast bottom not 23.7m This is speced in the rules. Cheers Peter s
apparent wind sailing Hi RAC _ light multihulls travel so fast that they never travel downwind as you would descfribe by putting the wing out...
Hi Erwan - Filament winders put the 45s on the outside to control and consolidate the 0-5deg fibres on the inside. So this is a procesing issue...
Hi Eric - yes initial buckling is an in plane mechanism. Its due to the compression of the material into a shorter space (not by a stress level as...
Mechanically there is no difference between a rope and the hydrualics used on an AC72. The 3 secs Tom mentions is something to do with the slight...
"The Flip" - Wow was that close? Well I decided to find out so found a couple of the good photos and analysed them. The boat got to 45degs so is...
I recently did a review project for Mike Waters at small trimaran design for one of his masts. The section is about 190x66mm speced by him. The...
Hi Eric - Like you I have been designing and building masts from sabots to superyachts over the last 20 years plus. 1) generally I spec a plain...
Hi Eric - Just a point of difference. If you build laminates with the 45s on the outside they perform worse in buckling then if you put them on...
Groper - Firstly the boats are very even. If you look at the average speeds of each race you will see that they vary from .2% to 2% max. If we...
http://www.onesails.com/design.php http://www.wb-sails.fi/en/services/vpp-analytics/ some sailmakers near you with CFD capability Cheers Peter S
Is telescopic best? must be hard to organise sail track etc? 11m to 3m means three pieces?What about a fwd mast pole that integrates with mast and...
Hey Guys - Keep to the topic. You two NZ's should be happy!! Peter S
Hi Xarax - The AC is rarely about money. Its about spending the most money "possible" to defend or challenge for the Cup. The...
stability The problem with 60ft is pitching stability. This was apparent with the ORMAs and they now have settled on 70ft as a good size. The...
