WinDesign4 VPP
WinDesign4 VPP
The velocity prediction program (VPP) suite of software that the Wolfson Unit is offering is its latest release of the industry standard WinDesign4 VPP. There is a Monohull Module and a Multihull Module available. Please email us with your VPP requirements.
£2820
How to order
- Purchase via the Wolfson Unit Online Store.
- Confirmation of payment is automatically emailed to you.
- Hardware lock (USB dongle) and installation instructions are couriered to you.
- The latest version of the software and release notes can be downloaded from the customer download area.
Need a quotation or require an invoice to purchase? Please contact us.
Frequently Asked Questions (FAQs)
FAQs
What is the definition of ‘K-R Sep’ found in the Flotation dialog, Keel group box ?
K-R separation is the mean distance between the leading edge of the keel and leading edge of the rudder.
I cannot run older .vpp files
The link with the underlying opsets (.ops) file may have been lost. Open the .vpp file and resave it to generate the opsets file, then run it again.
Does the program have a simplified input functionality?
Yes, the flotation parameters may be input directly in the VPP if the lines are not available.
How do I input a long keel hulform in the VPP?
The J Class option fundamentals are described in our paper ‘Development of a Vpp based rating for J-Class Yachts’. In summary:
LPP – use the long keel option, this means that the entire hull, integrated keel and rudder are all one geometry, so no need to define keel and rudder.
VPP – in the Modelling page of the Flotation dialog, use the following settings:
Otherwise you should be able to use the VPP in the usual way.
What coordinate system are the aero coefficients Cl and Cd referred to?
Apparent wind axes.
Is the basis area for Clx and Cdp the VPP’s calculated sail area of the respective sail?
Yes, but the user can change this sail area input.
What does the Cd2 term account for?
This is Quadratic profile drag, which is multiplier applied to Cl2 but is independent of effective span, i.e. actual span does not change the influence of this (~Total sail Drag= parasite drag + quadratic profile drag + induced drag).
Help and support
If you need any support from our team for the effective use of our software, please get in touch.