DaVinci Technologies, Inc. Newsletter June 8, 2001

Hello again from DaVinci Technologies. Here's the latest news...

CONTENTS
1) DEMO RELEASE IS NOW AVAILABLE ON OUR WEBSITE
2) FIRST BUG FIX UPDATE FOR MARCH 2001 RELEASE IS AVAILABLE ON WEBSITE
3) DESIGNS NEEDED FOR GALLERY SECTION ON WEBSITE
4) FORUM PRESENTATION SCHEDULED FOR EAA AIRVENTURE
5) TWO NEW FLAT-RATE CONSULTING PROGRAMS ANNOUNCED
6) THANKS FOR PRINTED MANUAL ORDERS

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1) DEMO RELEASE IS NOW AVAILABLE ON OUR WEBSITE
The demo version of our March 2001 release is now available for download from our web site at www.davincitechnologies.com/AirplanePDQDemo.htm. As with the previous version, the demo version has complete functionality except that you cannot save or print your designs. It also has only a small subset of the airfoil library available in the full version. Please take a look. We've removed the password requirement this time around so those of you that are shy about giving out your name and email address can download it anonymously.

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2) FIRST BUG FIX UPDATE FOR MARCH 2001 RELEASE IS AVAILABLE ON WEBSITE
An update to the March 2001 release is now available on our web site. This update addresses several issues regarding weight estimation, calculation of the fuselage volume for the Geometry Report, and missing Nacelle drag on the Drag Breakdown Report. You can download this update or get more information at www.davincitechnologies.com/updates.htm.

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3) DESIGNS NEEDED FOR GALLERY SECTION ON WEBSITE
We are working on a new section of our website that will showcase various airplane designs developed or modeled in AirplanePDQ. If you have a design you're working on and are willing to share, please send the drawing file to us at gallery@davincitechnologies.com. We'll be happy to provide a link to your web site if desired along with your design. If you're willing for us to display images of your design, but would rather not allow people to download the drawing file, that is fine as well just let us know. We'll also have a page where you can download additional engines or airfoils. If you have any airfoil data or engine data you'd like to share, please send it along.

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4) FORUM PRESENTATION SCHEDULED FOR EAA AIRVENTURE
The Oshkosh airshow is coming soon and this year I have the privilege of presenting a forum titled "Rapid Performance Evaluation of an Aircraft Design" on Thursday, July 26th at 2:30 in Pavilion 4. The forum will review some approximate methods for rapidly estimating performance of a design. Some spreadsheets and charts from the presentation will be available after the forum on the web site, so stay tuned. Details are available at http://www.airventure.org/forums/forum_detail.asp?EventID=12&SessionID=2722. Of course, we'll also have our booth at AirVenture so please stop by if you can. We'll be in building C, booth #3119.

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5) TWO NEW FLAT-RATE CONSULTING PROGRAMS ANNOUNCED
We are now offering two new flat-rate consulting services for our customers. The first is an airfoil analysis and data service. Finding published aerodynamic data for a particular airfoil you're interested in can be very difficult and in some cases impossible. We significantly increased the size of our airfoil database in the March 2001 Release, but there are still many airfoils, particularly the more modern designs, that are not in our database yet. To help address this problem, we're offering to provide detailed aerodynamic analysis of any airfoil section for the flat rate of $100/airfoil. We use an industry standard airfoil analysis tool for this work and generate data at a range of Reynolds numbers appropriate to your design. The aerodynamic coefficients will be provided to you in the proper format for use with AirplanePDQ.

The second service is a design review service. Many designers would like to have someone perform a detailed check on their design to help ensure that it will meet their requirements and provide suggestions for ways to improve the quality of the design. We're now offering this type of service for the flat rate of $875. This includes an in-depth review of your conceptual design and a detailed report on the estimated performance, and weight and balance. Your design will be compared with our historical database of other aircraft to provide additional confidence in the design. Sizing and layout of the various aircraft components will be analyzed for safety and performance. If any modifications are suggested, performance comparisons of the original design and the design including the suggested modifications will be provided in the written report.

If you would like further details on either of these services please contact me at the email or phone numbers shown below.

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6) THANKS FOR PRINTED MANUAL ORDERS
Thank you to all of you that have purchased the printed manuals. We hope that you have found them helpful. We were unsure of the demand at first, but have been very pleased with the continued interest. We anticipate selling out the last of the first printing in the next week or two and are preparing to order a second batch.

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Thank you to all of our customers for your support and to all of you that have continued to express interest in our AirplanePDQ software. If you have any questions or suggestions please let me know. You can reach me at gilcrouse@davincitechnologies.com, toll free at or for international callers at .

Best Regards,
Gil Crouse, President
DaVinci Technologies, Inc.