| CLASSES FLUTTER, DESIGN and COMPOSITE BUILDERS WORKSHOP Call 831-621-8760 for info. See All New Class Schedule Dates Below! |
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The 2008 Aircraft Design using FEA Workshop was attended by Jan Satraneck, M. Hollmann, Nicolas Carona and Michael Hasz. This is a comprehensive and difficult topic but everyone agreed that we covered much in 2 days. Composite
Workshop Builders meeting at ADI. It was
cold but the hot batches (60% resin-40% mekp) of resin set up fine.From left,
Mahesha Siddegowda, Robert Worley, Gary Lew, Chuck Hausladen, Bill Greenough
(the shy one who did not want to stop working), Richard Hogan, Glen Campbell and
Hollmann took a short break for a picture. With this talent we can build a
flying aircraft next time. Hi Martin -Wanted to drop you a quick note to say how
informative and enjoyable your class was this past weekend. During the class, I was concerned that we
hadn't gone in enough depth on non-FEA topics, but having read through most of the first volume of "Modern Aircraft Design" over the last two
days, I agree you hit just the right balance ... your book is so well written, and is so self-explanatory, that any reader could pick up those
concepts and work those formulas on their own ... I doubt the FEA work would lend itself to a similar self-paced approach, so spending more time
on FEA in class turned out to be entirely appropriate. My one suggestion might be to include Volume One as an additional "handout" for this
class, even if it means bumping the cost of the class to $650 ... no one who is serious about aircraft design should be without that book.
And I was flattered to see the picture of our class on your website, with the caption: "One of the best classes ever" - it was a very good
group, |
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On May 14 2005, we held the world's first Gyroplane Design Class. Everyone learned how to design a safe gyroplane. From the back is Martin Hollmann, Jasper Battjes, Robert Como, Dezso Molnar, Rob King, Bill Yancy. |
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The Flutter Class was attended by four serious engineers. For Sunday lunch, we ate sandwiches on my sailboat and took a tour of the Monterey Harbor. After going over the SAF program we needed this break.
Dear Martin, I really enjoyed the
flutter class, and found that it suited my requirements perfectly. I came away
with a much better idea of the fundamentals without the distraction of
concentrating too much on raw theory. I would recommend the course to busy
engineers. |
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Comments from attendees:
Martin, just wanted to thank you for hosting and teaching such a good course on FEA, and also thank you for the demo ride in the Stallion. It was fun to chat with
you about your experiences. I appreciate your openness and willingness to teach us and answer questions, for you are truly living the dream. Thanks for everything, and drop me a note if you are ever make it to the
Dallas area! |
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The FAA Flutter Class being held in Oklahoma City, Oklahoma in the Summer of 2002. Since then Hollmann has been working as an FAA DER for design, analysis and flutter on a number of STCs Projects for Flutter and Propeller Whirl Mode.
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AIRCRAFT DESIGN using FINITE ELEMENT METHODS |
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| This seminar is intended for all
who have an interest in designing and building their own
aircraft. The latest aircraft design technology, materials, and
computer programs will be discussed. Each participant will have
the opportunity to work on a computer and learn to use the
aircraft design programs. These programs include performance,
c.g., a.c., stability calculations, V-n diagram, wing sizing,
fuselage plot, fuselage loads, and the EMRC NISA finite element
analysis program. All programs run on a PC using Windows 2000.
Each student will receive a copy of the full blown NISA fea
program, 1,000 DOF, that has no time limit and can do statics, dynamics, and composites, and all
new aircraft design programs that run on Windows 2000.
Seminar covers: BASIC AIRCRAFT DESIGN: Size your aircraft to your desired performance (top speed, endurance, climb angle, etc.) and calculate gross weight, wing area, engine power, etc.; determine c.g., aerodynamic center, airfoils, stall speed, tail trim, etc. for conventional or three surface configuration. FINITE ELEMENT ANALYSIS: Using NISA, each student will learn how to set up a finite element model of a wing and determine stress distributions from static loads and perform a modal analysis used in wing flutter prediction. LOADS ANALYSIS: Calculate load factors for your aircraft per 14 CFR, Part 23; construct V-n diagram; calculate air-load distributions, landing loads. STRUCTURAL SIZING AND ANALYSIS: Design and size your load structures, including wing spars, wing attach-fittings, stabilizers, landing gear struts, etc. OPTIMIZING COMPOSITE STRUCTURES: Determine optimum ply orientations and calculate stiffness and strengths using netting analysis, rule of mixtures, tensor analysis, maximum strain energy criteria, etc.; determine safety factors and margins of safety. How to utilize foam moldless and molded layup methods; prepregs vs. wet layups and gel coats; plug construction; vacuum bagging; fabrication techniques for minimizing cost and weight; attaching composites to similar and dissimilar materials; finishing materials and techniques; health and safety; proof-testing composite structures. ADVANCED TOPICS: Designing composite structures for pressurization, lighting strike and icing protection. An introduction to flutter prediction is also included. COURSE TEXT NOTEBOOK & COMPUTER PROGRAMS: Comprehensive, a 8 1/2 x 11 book includes all design and analysis formulas, materials data, testing methods for composites and much more. All computer programs. Advance Registration: Due to limited size, advanced registration is required. Registration at the door will not be accepted. To register send check to: AIRCRAFT DESIGNS, INC. 5 Harris Ct. Building S. Monterey, CA 93940. Advanced registration is required and no refunds unless mutually agreed upon! Registration fee: $595 includes lunch and all course material. |
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HANDS-ON FLUTTER ANALYSIS Saturday and Sunday, November 22 -23, 2008 A Two-Day Intensive Seminar/Workshop. Conducted by: MARTIN HOLLMANN, M.S. |
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| This seminar is
intended for all aircraft designers who have an interest and a
need to solve subsonic aerodynamic flutter problems using a PC.
Learn the steps for solving flutter problems starting by setting
up a finite element analysis model using EMRC NISA of the aircraft
lifting surfaces and entering modal and frequency data for the
Subsonic Aerodynamic Flutter Program called SAF. Participant will
work in teams of two per PC and each participant will receive a
full blown copy of NISA program, 1,000 DOF that is not time limited.
Seminar includes: COMPUTER PROGRAMS for the PC using Windows 2000: NISA Finite Element Analysis Program: Set up structural models of wing using NISA and solve for eigenvalues and mode shapes. Model can include isotropic materials and composite sandwich structures. Learn how to interpret data and use pre and post processor. View animated modal shapes. SUBSONIC AERODYNAMIC FLUTTER Program for the PC: Using this program, plots of damping and frequency as a function of velocity are used to determine the critical flutter speeds and participating mode shapes. Program determines flutter speeds and divergence speeds for various altitudes, symmetric and asymmetric modes. COURSE TEXT NOTEBOOK: Comprehensive, in a 8 1/2 x 11 spiral bound notebook, includes all data and example problems that you will solve. QUALIFICATIONS: Participant should be familiar with operating a PC and using the Windows 2000 operating environment. No other qualifications are necessary. Advance Registration: Due to limited class size, advanced registration is required and no refunds unless mutually agreed upon!. Registration at the door will not be accepted. To register, send check to: AIRCRAFT DESIGNS, INC.5 Harris Ct. Building S. Monterey, CA 93940 Registration fee: $680 includes lunch and all course material. |
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| HANDS-ON COMPOSITE AIRCRAFT BUILDER'S WORKSHOP Saturday and Sunday, January 10 - 11, 2009 A Two-Day Intensive Workshop. This class has been held since 1983. |
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| Intended for all who are building a composite aircraft such as the Stallion, Lancair, Glasair, Wheeler Express and for
those building a prototype of their own design. You will learn how to fabricate and assemble parts and build a complete aircraft using composites and composite
material fabrication methods. Learn the secrets of the trade in building cored structures using foam and honeycomb. This project will include learning what
resins to use were and how to mix and apply them, shaping foam, wet layup procedures, flanging, bonding metal to composites and composites to composites using
resins and adhesives, pop riveting, and much more. The project will be built using a simple moldless construction method used in building prototypes. Learn
where to buy what and for what price. The following specific topics will be discussed during the class.
RESINS: How to layup parts using vinylester, Derakane 411-400 and epoxy, Epon 862/TETA, resin. Mixing ratios, Sticky Stuff Dispenser, methods for
mixing by weight and volume, applying, and storing, and safety precautions. How to make and apply micro and flox. When and when not to post cure to increase
strength and shorten cure cycle. Mold making and gel coats and release agents. Film and past adhesives used in the industry and how to prepare aluminum and
composites to properly use them. Class will be held at Aircraft Designs, Inc. 5 Harris Ct. Building S. Monterey, CA 93940. Advanced registration is required and no refunds unless mutually agreed upon! Registration fee: $495.00 includes all composite materials for project, workbook, and lunches. For more info contact Aircraft Designs, Inc. Telephone 831-621-8760. |
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One-Day
Gyroplane Design Class! Learn how simple it is to design a safe gyroplane! Using a
PC, Windows 2000/XP, you will go thru the steps of designing a gyroplane.
Computer programs include: Performance, Propeller Optimization,
Rotor Blade Design, Rotor Loads, Landing Gear Design, Jump Start, Stability
and Control. Also learn about composite materials and flying the
gyroplane. All programs in Modern Gyroplane Design and a
workbook and lunch are included. Cost is $395. |
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| © 2008 Aircraft Designs, Inc. | |||
