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NEXRAD: How to Use It Correctly KITPLANES ® TLY MARCH 2018 MARCH www.kitplanes.com rrec Places Spars IT CO IT Tight Xenos Problems in E In theShop: • Battery • Drilling • Building IDENTS cc 32 PEED MODS S M T A L YSTE EBUI S M II F Electric Lycoming Fly Faster withFly Fairings Comparing the Rates E HO LOW-COST LOW-COST NEXRAD: HOW TO US NEXRAD: TO HOW KITPLANES MARCH 2018 Durand Mark V • NEXRAD • Speed Mods • Homebuilt Accidents • EFII System 32 • Battery Problems • Xenos Spars • T3 Tailwheel • Flanged Composite Parts BELVOIR PUBLICATIONS FROM DYNON AND ADVANCED FLIGHT SYSTEMS A completely custom panel, Designed for “plug-n-play” with guidance from our experts upgradability Your choice of Powder Advanced AF-5000 coated and silk series or Dynon screened panel SkyView in your panel Save hundreds of hours with harnesses customized for your Custom switch modules with aircraft, tied together crisp tactile feel and LED with the exclusive power indication ADVANCED Control Module You’re a homebuilder, not an electrician. You love crafting your airplane, and can’t wait to fly now that it has wings. A Quick Panel cuts hundreds of hours off your avionics system installation with a complete, professionally engineered panel, delivered ready-to-install in your homebuilt aircraft. To customize your Quick Panel, call us today at (503) 263-0037 dynon.aero/quickpanels CONTENTSMarch 2018 | Volume 35, Number 3 Flight Review 6 DURAND REINSTATEMENT: Planning a kit for the unique Mark V negative-stagger biplane. By Scott M. Spangler. Builder Spotlight 16 NEXRAD FOR KIT AIRCRAFT DRIVERS: A tremendous safety tool for wise, cautious pilots. By Myron Nelson. 22 EFFECT OF FAIRINGS ON SPEED: Reducing drag is an economical way to go faster. By Nigel Speedy. 26 TRICKED-OUT TAILWHEEL: T3 suspension system eliminates relaunches when touchdowns are a bit too firm. By Paul Dye. 30 HOMEBUILT ACCIDENTS—COMPARING THE RATES: 16 A true head-to-head comparison with production aircraft is difficult to achieve. By Ron Wanttaja. 34 UNDER NEW MANAGEMENT: EFII’s all-new electronic engine control system for Lycomings. By Tom Wilson. 41 PIONEER MECHANICS IN AVIATION : A book by Giacinta Bradley Koontz. Reviewed by Bob Hadley. 42 SPARS—THE HEART OF THE WING: Laying out the spar, part 2. By Paul Dye. 48 RAPID PROTOTYPING AND ExPERIMENTAL DESIGN: Sandwich panels, part 5—a simple, accurate method for molding flanged parts. By Eric Stewart. 66 COMPLETIONS: Builders share their successes. 72 ASK THE DAR: Repairman certificate eligibility, ELSA mods, flying at civil twilight, fuel cap engraving. By Mel Asberry. Shop Talk 53 THE CREATIVE HOMEBUILDER: Make your own air-flow speed control. By KITPLANES® Staff. 54 PLANE AND SIMPLE: Drilling in tight places. By Jon Croke. 56 MAINTENANCE MATTERS: Three battery problems lead to accidents. By Dave Prizio. 60 HOME SHOP MACHINIST: Spline-al tap. By Bob Hadley. 76 AERO ’LECTRICS: Spread those sheets. By Jim Weir. 79 UNAIRWORTHY: Throttle interference. By Vic Syracuse. Shop Tip 55 MAGNET CLAMPS: By David Paule. 6 Designer’s Notebook 73 WIND TUNNEL: Design process, part 4—more about speed. By Barnaby Wainfan. Exploring 2 EdITOR’S LOG: Perspective. By Paul Dye. 63 CHECKPOINTS: Last action taken. By Vic Syracuse. 78 REAR COCKPIT: Layoffs, I’ve had a few. By Tom Wilson. Kit Bits 4 LETTERS 67 LIST OF AdVERTISERS 68 BUILDERS’ MARKETPLACE 42 80 KIT STUFF: Drawing on experience. By cartoonist Robrucha. On the Cover: Durand Mark V staggerwing photographed by Richard VanderMeulen. For subscription information, contact KITPLANES® at 800/622-1065 or visit www.kitplanes.com/cs. KITPLANES March 2018 1 EDITOR’S LOG Perspective There’s nothing like an airplane in the trees and rocks. Hiking out to give you a better perspective after an off-airport landing might of the world—the big picture, so not be the wisest thing to do, so to speak. I thought of this recently long as you are reasonably certain while listening to a new audio book that someone knows where you on the Donner party, the group of are. Standard 121.5 ELT? I wouldn’t emigrants who got themselves count on it. Even if it works, I stuck in the Sierra Nevada winter have known of search efforts that of 1846. They were actually early in couldn’t find one before the bat- the westward migration, and were teries ran out. Far better to carry among the first on the route across a GPS-enabled personal locator the Great Salt Lake and Desert. To beacon; it will bring searchers right be honest, they made just about down on top of your position. every bad decision they possibly Lesson number two from the could, which brought them to Donner party has to do with think- what is now the town of Truckee, ing about all available options. California (on the shores of today’s If you look at pictures, the road Donner Lake), just as the worst west was perilous—as I men- winter they had ever seen closed tioned, granite escarpments and in on them. cliffs that today are a huge draw Imagine being stuck in a white- for rock climbers from all over out that lasted for days and built the area. On the weekend, you snow depths of 12 to 20 feet. Ahead Looking west toward California’s Donner Lake. During can’t find a place to park for all the the winter of 1846–47, the Donner party camped on of you, the valley ends in granite climbers. And once you cross the the east shore (foreground) at what is now known as escarpments that would be difficult Donner Memorial State Park. (Photo: Paul Dye) pass, it is downhill to the pleasant to climb alone—much less having Central Valley of California. But if to bring wagons and oxen along. It was a the summit of the pass. The emaciated you pick the wrong drainage to follow, brutal place that winter, and the trials and settlers who attempted to hike out to you are in an inescapable canyon wil- tribulations they went through fill many the west after a month of being stranded derness that will stop all forward prog- volumes. That nearly half the party sur- took two days just to cross the lake, and ress and not leave a place to climb out. vived to be rescued is amazing. then two more days to climb the gran- This is exactly what happened to the What I find most interesting about ite. What we can cross in minutes was a desperate settlers of the Donner party. this—and why aviation comes into it— lifetime for them. And the amazing thing Their relentless effort was directed is seeing it all from the air. On a recent about seeing it from the air is that it sim- westward, always westward. November morning, it took me about ply doesn’t look that hard. Yet to the east, it was a fairly gentle eight minutes to fly from the lowlands That brings us to lesson number one descent along a trail they had already to the east (Truckee Meadows, better for those flying over hostile terrain: The used down into the Truckee Meadows of known today as the City of Reno) to Don- world looks small from up in the air—but what is now Nevada. While winter there ner Lake, and two minutes more to reach it gets immensely larger if you are down is certainly a bit chilly, and they’d still face Paul Dye, KITPLANES® Editor in Chief, retired as a Lead Flight Director for NASA’s Human Space Flight program, with 40 years of aerospace experience on everything from Cubs to the Space Shuttle. An avid homebuilder, he began flying and working on airplanes as a teen, and has experience with a wide range of construction techniques and materials. He flies an RV-8 that he built, an RV-3 that he built with his pilot wife, as well as a Dream Tundra they completed. Currently, they are building a Xenos motorglider. Paul Dye A commercially licensed pilot, he has logged over 5000 hours in many different types of aircraft and is an A&P, EAA Tech Counselor and Flight Advisor, as well as a member of the Homebuilder’s Council. He consults and collaborates in aerospace operations and flight-testing projects across the country. 2 KITPLANES March 2018 www.kitplanes.com & www.facebook.com/kitplanes the task of building shelter, there was have turned around (it’s that “slow but we’d also run out of service ceiling— game aplenty and a much better chance boiling frog” thing—we suddenly find and had to make the decision to retreat of survival. But they never even seemed ourselves in a place we wouldn’t be if back to where we started (200 miles to consider the option of turning around we knew how bad it was going to get). distant) because there were no other air- and retreating until spring. Instead, as We figure it’s been bad, but we can ports along the way. It was a tough call— those who have heard the term “Don- tough it out for a little longer. And sud- but the right one, in the end. ner party” know, some of them ended denly, we’re trapped—in the cloud, low When you find yourself in a situation up resorting to cannibalism to survive. to the ground, and not certain where where you’d rather not be, it’s impor- Pretty desperate measure to avoid back- there might be towers or rocks. The tant to look at all your options—ahead, ing up or turning around.
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