PRESS RELEASE – FOR IMMEDIATE RELEASE

OPTIMIZATION OF DIAMOND D-JET VERY LIGHT JET FACILITATED BY SCULPTOR DESIGN RECOMMENDATION

PROVO, UTAH, United States of America – March 31, 2008

NEED

Diamond Aircraft Industries, one of the world’s premier producers of single and twin-engine propeller aircraft and single-engine jet aircraft, is currently developing a single-engine Very Light Jet (VLJ), the “D-Jet”. During the development phase, a suite of advanced Computational Fluid Dynamics (CFD) technologies is applied in order to speed up the engineering process.

Optimal Solutions Software, LLC, with the use of its unique Sculptor real-time CFD design deformation technology, teamed up with ANSYS, Inc., a global innovator of simulation software and technologies, and used that Company’s FLUENT® software to assist in the CFD optimization of the wing and nacelle of the D-Jet. The study culminated in a proprietary recommendation to Diamond that projects a significant improvement to wing/nacelle interference and stall characteristics.

“Using Sculptor, we rapidly found solutions to problems that had eluded us for some time. The 2nd flying D-Jet prototype incorporates lessons learned from the Sculptor optimization.

Riaan Myburgh Lead, Flight Sciences Diamond Aircraft Industries Canada, Inc. www.diamondair.com

DESIGN PROCESS

Sculptor was used to deform the Baseline meshed geometry into new FLUENT® case files for solving. A brief description of the process follows:

The Baseline mesh was read into Sculptor, after which the engineer created an Arbitrary Shape Deformation (ASD) volume around the geometry that was to be deformed. The control points of the ASD were positioned and aligned to give the desired deformations. The ASD volume was then “frozen”. After the volume was frozen, the engineer moved the control points, and the meshed geometry deformed accordingly.

Additionally, optimization algorithms may be employed to automatically move the control points to achieve automatic shape optimization. For this study, a total of five different ASD volumes were created to explore a variety of ways of deforming the Baseline, as shown below.

About ANSYS, Inc. – www.ansys.com

ANSYS, Inc., founded in 1970, develops and globally markets engineering simulation software and technologies widely used by engineers and designers across a broad spectrum of industries. The Company focuses on the development of open and flexible solutions that enable users to analyze designs directly on the desktop, providing a common platform for fast, efficient and cost-conscious product development, from design concept to final-stage testing and validation.

The Company and its global network of channel partners provide sales, support and training for customers. Headquartered in Canonsburg, Pennsylvania, U.S.A., with more than 40 strategic sales locations throughout the world, ANSYS, Inc. and its subsidiaries employ approximately 1,400 people and distribute ANSYS products through a network of channel partners in over 40 countries.

About Optimal Solutions Software, LLC – www.optimalsolutions.us

Optimal Solutions Software, LLC, is the developer of a unique technology which performs optimal shape design for the computational fluid dynamic (CFD) and finite element analysis (FEA) industries. With the recent launch of SculptorPLUS, the next release of Optimal Solutions Software’s major offering to the CFD/FEA industry, OSS is now better able to answer the question of how to improve engineering designs—in the most cost-effective, timely manner.

Using proprietary Arbitrary Shape Deformation (ASD) technology, the user can easily and intuitively change the shape of a model in a smooth and controlled manner—in real time. Major changes that previously took months now take days; days are now hours; and previous hours’ changes are now achieved in minutes.

Optimal Solutions’ Sculptor suite of software products enables design engineers to reduce the need for costly physical testing and prototyping. Any company or industry that designs components with fluid flow, heat and mass transfer, and/or chemically-reacting flows; including combustion, aero elasticity, as well as structural design, benefit from using the Sculptor products.