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EAA Experimenter - EAA's Homebuilders e-Newsletter
   
 
August 2009
  EAA Experimenter - EAA's Homebuilders e-Newsletter
Inside this Issue
Snedden M7
Drag for the Common Man
How Fast Are You Really Going?
Wiring Made Simple
Flitzer - Nostalgia Now!
 
 
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WELCOME!
Joe NorrisA Record Year for Homebuilts
Wow! Many adjectives are being applied to EAA AirVenture Oshkosh 2009 - best ever, spectacular, amazing - all apply.

This was a record year for homebuilts at AirVenture with 1,024 registered throughout the week. What an amazing sight it was to look across the homebuilt parking and camping areas and see the wide variety of aircraft, the wonderful craftsmanship on display, and most importantly, the camaraderie evident among the people. I want to thank each and every one of you who attended. The pilots who flew the planes to Oshkosh, the volunteers who put in so many hours helping their fellow EAA members, and the enthusiasts who came to look at the planes, possibly to gain inspiration to pursue their own dreams of building an aircraft. All of you helped make the 2009 EAA convention a huge success. That's what it's all about! - Joe Norris

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Paul's Pick
Paul Poberezny
Do things really change? Do we members change - new ones or us older folks? Not really. Here it is - 2009 - and I was asked to write an article for this month's Experimenter, and I thought that an editorial I wrote for Vintage Airplane back in 1975, some 34 years ago, would still be appropriate today. In reading EAA chapter newsletters and personal correspondence received, us folks haven't changed all that much. But look how EAA has grown through the years and all of aviation is richer for it. Read more
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Snedden M7
SneddenTo say that Andrew Snedden is passionate about the current state of the ultralight industry is an understatement. But unlike those who will sit on the sidelines and bemoan the "good 'ol days", he’s doing something about it. His answer is the innovative Snedden M7. Read more
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Drag for the Common Man
My plane is too slow-is it too little power or too much drag? What is my propulsive efficiency? How does my plane's efficiency compare to that of my buddy's plane? How will changing weight affect performance? What will my fuel consumption be at x speed and altitude? Howard Handleman has developed a model and a spreadsheet to predict answers to these questions and more.
Read more
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How Fast Are You Really Going?
Paul LippsHere I am toolin’ along in my Fast-Glaster behind that big ol’ TIO-540, lookin’ at those two multi-function displays (MFD). 280 knots! 322 mph! Hot dog - and I just came from the avionics shop where the avionics tech worked his magic on my pitot-static system while I fed numbers into the computer from my laptop, so I know what it says is true. Read more
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How To ...
Wiring Made Simple
Terminal strips versus point-to-point
WiringIn the latter stages of building your project, regardless of which airframe you have chosen, you will be faced with electrical installations and wiring decisions. All this must be thought out and planned before you install those fascinating gauges. The following will give you contemplative action to occupy all those empty hours during the winter-as if you needed any more concerns. Read more
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What Our Members are Building
Flitzer - Nostalgia Now!

FlitzerRolf Steiger climbed gingerly from the gangway into the cockpit of the tiny bright red biplane suspended beneath the bow of the old Schutte-Lanz airship as it plowed its way through the arctic air. They were on a secret mission to survey future refueling stops for German U-boats, but the real goal was to locate the hidden treasure of the Romanovs. Now plans are available for the 18-foot span wood-and-fabric sport plane, and John Morris is building one.  Read more
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From the EAA Homebuilding Community
Oshkosh 365 The Homebuilders Corner message forum at Oshkosh365 is buzzing with activity. People are discussing everything from favorite kits to homemade towbars. And some users have questions that we're betting some of you might be able to answer. Have a look at the list below and follow the links to read the actual questions and discussion topics.

Can You Help?
 : How do I build a Comm antenna?
 : Prepping a composite fuel tank for ethanol?
 : Venting a crankcase on a Lycoming engine?

Interesting Discussions
 : What are you building?
 : Check out this brilliant homemade towbar!
 : What's the best homebuilt amphibian?

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From the Editor
Pat PanzeraPatrick Panzera, EAA 555743
ppanzera@eaa.org

I really appreciate the comments many of you have been leaving at the survey link; please keep it up. Your input certainly helps me find and choose articles that will be well-received. Interestingly, one of our readers last month mentioned that the July issue seemed to have a biplane theme. The selection of each feature was certainly intentional, but the grouping was not. There was no theme in mind; it just happened to work out that way. But this issue's focus on performance was not by accident.

It has always been a pet peeve of mine that we can't seem to be on the same page with respect to reporting the performance of our homebuilt aircraft. Sometimes we'll see almost identical homebuilts reporting varying performance numbers, and more times than not the designer's numbers almost seem to be an unattainable goal. My contention is that the planes are not all that different from one another or even from the prototype; the inconsistency comes in with the measuring, interpreting, and reporting of the performance. Most reporting is empirical at best.

With the publishing of Paul Lipps' tongue-in-cheek "How Fast Are You Really Going?" article and Howard Handelman's "Power and Drag for the Common Man" masterpiece in this issue, I think we can start on a journey of accurately gathering, extrapolating, and reporting performance in a meaningful way.

Look forward to more of these performance-based articles in the future. Feel free to submit articles of your own as well-performance-based or otherwise. For those who would rather just build and fly, I apologize for dedicating space to the performance subject, but you weren't forgotten. The Flitzer and Snedden M7 articles should make up for it-although the M7 demonstrates some wicked performance.

And by all means, please feel free to discuss any of these articles in the forums area of the newly formed Oshkosh365 community.

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Hints for Homebuilders
AeroVee Ignition Timing
In this segment, Jeremy Monnett of Sonex Aircraft, demonstrates how to properly set the timing on the AeroVee 2.1 VW based engine conversion. Sonex Aircraft offers the AeroVee Engine which is a complete VW conversion engine kit.

Watch the video
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From the Archives
Sport Aviation, February 1999
How Airplanes Fly: A Physical Description of Lift
By David Anderson and Scott Eberhardt

This is not what you learned in ground school. Read the article

You can also search the archives by subject for a multitude of technical and how-to articles.

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Questions and AnswersQ&A
Got a question? Send it to us at Experimenter@eaa.org.
Whether you're building, restoring, or just an enthusiast. we want to know what has you stumped.

Q: I've seen some amateur-built aircraft with very detailed maintenance records, and some that are much less complete. Aren't there regulations that govern recording of aircraft maintenance? What is required to be in the aircraft logs? 
Read the answer

Read more Q&A

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Homebuilder Gallery of the Month
Sport Pilot Homebuilts
September 1, 2009, marks the fifth anniversary of the sport pilot and light-sport aircraft regulations. This month’s photo gallery features a few of the many homebuilts that may be operated by sport pilots.

View the photo gallery

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Poll Poll
Q.
What was your primary source of guidance as you prepared to flight-test your new homebuilt?

Poll - Vote Now!

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Aviation Glossary
Confused by a strange aeronautical term? EAA's online Aviation Glossary can help.

SERVO TAB - A small portion of a flight-control surface that deploys in such a way that it helps to move the entire flight-control surface in the direction that the pilot wishes it to go. A servo tab is a dynamic device that deploys to decrease the pilot's workload and destabilize the aircraft.

More glossary terms

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Forum Review
Aircraft Welding Basics

In this historical forum recording from EAA AirVenture 2008, Budd Davisson discusses the basics of welding your aircraft. His presentation covers types of welding, equipment, and tips and techniques. With a special emphasis on gas welding, this audio seminar will provide you with good information to get started on the path to welding your aircraft structure successfully. More information about Budd is available at www.airbum.com. Read more
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Around the Web
Check out these interesting and informative videos and websites. Have a favorite technical site? Share it with us at Experimenter@eaa.org.

This month's featured link:
Definitely worth five minutes of your time! This wonderful video from EAA member Wesley Perkins shows a great summary of highlights from AirVenture 2009.

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