Monday, January 09, 2006

Design Concept

Design Concept__________Project
A PYD project comes from the requirement of proposing a real innovative object for a market that is looking for originality together with high quality level.
Taking advantage of the most modern building system together with a careful choice of material it is possible to realise a really comfortable, safe and fast yacht: a 'tout court' wind machine.
To realise all of this the ship owner, who inspires the concepts at the base of the boat, applies to PYD exposing his requirements giving punctual directions on the boat features and its use, or he just establishes the objects that he absolutely wants to reach, leaving to PYD the interpretation and the transposition of a product of true quality.
In this way PYD takes care of all the rest until the launching day, leaving to the ship owner the pleasure to follow the works with the possibility of making eventual changes during the building process.
Power, speed, versatility and security are realised thanks to the balancing of the sailing plan and the big dynamic stability which allows to sail safely with reduced crew, exploiting in the same time the speed features of the hull.
We are very sure that higher speed means security, and optimise the project since the preliminary phase, choosing a medium-light displacement combined to a detailed structural study; in fact the last one allows to obtain more rigidity and lightness distributing the tensions induced by the equipment on bigger surfaces.
The structural interiors are planned following ergonomic rules, combining comfort and praticalness in line with the new concept of PYD design.
The keel plan provides the fixed or movable keel which gives maximum efficiency (sailing safety and nimbly in any condition), and functionality to reach any landing place.


Design Concept__________Hull
After several comparisons and tests by computer on a group of keels similar in proportion but with different geometry and coefficients, we choose the hull which can exploit the big power of the sailing plan in the best possible way not changing the own features of feed drag.
Therefore the sections are flared on the sides and rounded on the bottom, to grant the least wetted surface and reduce the feed drag.
Water lines are drawn considering the heeled hull within 10 - 25 degrees, obtaining stretched and fast diagonals; the hull, having floating narrow sections, allows to preserve the same geometry for different heeling angles, keeping the hull on an ideal axe for a better interaction between the hull and the appendix.
Particular care was taken in the distribution of volumes to reduce pitching and rolling, keeping high values of dynamic stability.
Bow sections are very thin and present a good entry semi-angle even in high heeling.
The drawings are made by computer using programmes of smoothing surfaces and CAD programmes, to grant maximum punctuality since the planning phase.
The study of hulls is effected by VPP software (Velocity Prediction Program) comparing VPP of PYD to VPP of regatta rules.


Design Concept__________Deck
The deck is planned ergonomically, defining the crew operative areas in consideration of the cruise and the sport use, so to concentrate the operations in some technical areas leaving the maximum possibilities of movement in other areas appointed to the living in the cruise.
The cockpit, not so deep, presents lightly inclined sides which link up to wide curved surfaces.
The bottom, being semi-lenticular, ensures an excellent water drainage together with a good stability, even with high heeling angles.
The upper deck is structurally auto-bearing, therefore no internal reinforcement is needed.
The particular geometry of the cockpit and of the deckhouse allows the best distribution of the tensions caused by the equipment where, by, the tissues are oriented as per the strength direction.
During the planning phase we consider the weight of each component from the hardware to the equipment, looking for a distribution that represents the best compromise solution between the optimisation of the gravity centre and the ease of rigging.
Also in the upper deck plan you can recognise the concept of PYD Yacht which presents a high dynamism and an excellent ergonomy.
The smart profile from stem to stern and the marked design of the deckhouse underlines the boat character addressed to those who appreciate the value of design and its way of appearing.


Design Concept__________Interiors
Also the interiors wholly reflect the philosophy of the project combining together lightness, ergonomy, functionality and aesthetics.
In fact, thanks to chromatic choice and aimed ergonomic choices, the boat combines deisign and high level of finish.
'New' interiors where structural elements are not hidden but clearly in evidence because of elements which characterise the very project.
The materials used for interiors are panels made out of composite realised in the vacuum sandwich technique.
Thanks to this system cabinets benches etc, are integrant part of the structure being bound to the hull to obtain a hard and light mono-coque.
The look of interiors is very peculiar, both in the finishing and in the accessories; in fact the finishing at sight, made out of teak heart-wood or carbon, are combined in contrast with light colours.
Composite, wood, metal and leather are the ingredients of a mix evidenced by the lightness of the surrounding, thanks to several windows during the day and several light-spots exploited by gaining shining bodies during the night.
It is easy to understand that even in the case of the interiors, the personalisation by the ship owner is total, making the boat suitable to his own exigencies together with the design and the designer taste.


Design Concept__________Structures
The structures are studied in the same time of the internal disposition to have more rigidity at a parity of weight.
The structural state is mainly longitudinal to reduce torsion and bending phenomena due to the sailing plan weight on the stay and shrouds.
Only in located areas the longitudinal structure is combined to transverse elements that not only reduce the span of the first ones, lightening them from the weight, but also grant a better distribution of the tensions to the whole body.
The same structures include even the installations, in fact both the water tanks and the canalisation of the electrical system are structural; the latter run through two longitudinal pled distributing, in this way, the consumption, light, instruments and services on the overall length of the boat.
All the structure panels are made out of composite, realised by the vacuum sandwich technique.
The thickness is different according to their structure.
In the high loaded areas the core of the structures is made out of PVC or high density foliated, a solution adopted to privilege both hardness and absorption of the tensions preserving the areas interested by the phenomenon of stress.


Design Concept__________Appendix
The study on the appendix is made by test on different configurations to satisfy the base requests of the project and to guarantee compatibility with IMS system, maximum hydrodynamic efficiency, high stability and reduced draught.
High stability and structural efficiency are obtained either by the fixed keel configuration or by the movable keel system.
The last solution grants in the same time even reduced draught, thanks to a new movable keel system that allows the access to landings and preserves the needed stability in the bearing tacks, in fact the keel can be raised even during the navigation withdrawing it in down-wind way and bathing it until maximum extension even during up-wind way, granting high speed during the cruise.
The movable keel system is electro-hydraulic and it is entirely controlled from the cockpit where, in comfortable position, the helmsman-self can run and control the drive by a special control board.
Concerning the rudder we prefer the maximum efficiency and controllability in every speed using particular profiles combined with a high immersion.
The rudder is placed in an advanced position, fluid-dynamically free from the keel and from the stern exits.
Through these solutions the stability is high and, in the same time, the inertia of the boat permits an excellent passage on the wave.



Design Concept__________Sail Plan
The sail plan of PYD Yachts is particular because it combines the geometry of a mast-head to the fractionated portions.
We exploit the structural advantages of a mast-head rig (lack of runners and lateral stability) together with aerodynamic quality of a fractionated rig.
Using a 3D simulation software several configurations can be tested that, combined to analysis made by VPP software (Velocity Prediction Program), allow to obtain a particular geometry, where mainsail and jib at 100%, interact with no problems until 20 real wind knots, combining power and ease conduction.
The reduced overlapping of the jib allows to adopt a large spreaders rig, reducing the compression on the mast and eliminating the running shrouds for safe navigation even in extreme situations.
The sail plan, rigging and mast are developed together enabling a further structural optimisation.
The mast geometry is studied on the computer using a software for structural calculation, choosing the best profile and optimising the dimensions of the shrouds.


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PYD Picco Yacht Design
c.so Milano, 156 37138 Verona – Italy
+39 045 810.41.46
info@piccoyachtdesign.com
www.piccoyachtdesign.com