5 FLIGHT TESTS NORTHEAST SAILPLANE PRODUCTS ...

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The JR Matchbox and Futaba M5A-10 allow you to synchronize up to four servos so they move in harmony with one another. This is important when using two digital servos on one control surface because if they are not synchronized, they will quickly drain the flight battery. Working together WITH THE TREMENDOUS HOLDING POWER THAT DIGITAL SERVOS have, you might think that there would be no reason to use more than one of them on any control surface, but you would be wrong. Many available models are so large (or have such large control sur faces) that the only way to achieve a safe positive control is to gang up the servos on each control surface. Because of their pre cise response to control-stick inputs, digital servos are the perfect choice when you have to use more than one servo on a control surface. When you have multiple digital servos on a control surface, each servo must be precisely matched to the other to minimize excessive draining of the flight batteries because the servos will fight each other if their travel points are different. To achieve this harmony amongst the servos, you can use devices such as JR's Matchbox or Futaba's MSA-10. The Matchbox and MSA-10 allow you to synchronize the neu trals, endpoints and servo direction of up to four servos from a sin gle receiver channel. Precision control of each servo's movement guarantees that all the servos on a single control surface will work together efficiently and in harmony. These servo-matching systems allow each set of servo groups to have its own independent power source (battery), and that allows all the power from the main flight battery to go directly to the receiver. To minimize the number of servo leads and their length, the Matchbox and MSA-10 can be mounted close to the control sur faces. Each servo plug can go into the servo-matching system, and then, just one servo wire is connected from the Matchbox or MSA-10 to the appropriate receiver port. This eliminates the mas sive clutter of wires that snake their way through the inside of the aircraft to the receiver. If your plane requires multiple digital servos for each control surface, servo-matching systems will make installation easier and allow all of the servos to work in concert. Airtronics offers a complete line of digital servos. Available with p or metal gears, these servos can be operated on 4.8 to 6 vol range from 73 to 115 oz.-in. of torque. This is just a sample of the advantages offered by servos, and we've only scratched the surface of the Hitec Servo Programmer HFP-10's programming capabilities! ARE DIGITAL SERVOS FOR YOU? Many non-digital, high-torque/high-speed servos are a and they may meet your plane's needs without your ha switch to digital servos. If you're on a tight budget, i sense to continue using standard servos. Standard servos a better choice for control surfaces that tend to jam, flaps, retracts and spoilers. A jammed digital servo will deplete battery power and will add significant stress to a linkages. Don't use a high-powered digital servo to ove binding linkage; the servo will simply fight with full po ing to overcome the bad linkage setup. Use digital servos when you need precision control o holding power. If you need higher torque in a small ser tal servos are a good choice. Just remember: the faster th flies or the larger the control surfaces, the more you wil from using digital servos in the plane. Ask any pilot w used digital servos; he will tell you to switch. See the Source Guide on page 151 for manufacturers' con
82 MODEL AIRPLANE NEWS BY GERRY YARRISH PHOTO BY DERON NEBLETT IN TODAY'S PC-, CD- AND DVD-FILLED WORLD, IT'S TOUGH TO REMEMBER TIME when there weren't any RC aircraft flight simulators. Almost 20 years into this virtual wonderland, we almost take them for granted; they're viewed as a fully established part of our hobby. There is a plethora of flight simulators to choose from, and each has its own distinct flavor and style. Compared with the pro grams we used just a few short years ago, the newest generation of sims is simply amazing. The Aerofly Professional Deluxe from Ikarus is one of the newest, and it has a lot to offer. Flying: the Ikarus Aerofly Professional Deluxe At a glance, this impressive flight sim offers more than 50 extremely well-detailed aircraft to fly, and that includes 3D aerobats, turbine-powered jets, scale and sport airplanes, biplanes, gliders and helicopters. Aerofly offers many enjoyable landscapes in which to fly, such as club flying fields, farm pastures and even the deck of the aircraft carrier USS Enterprise. If you like what you've read so far, hold on; there's a whole lot more to see. Let's take these virtual airplanes for a spin!
Page 1 and 2: DIGITAL SERVOS MORE MUSCLE FOR YOUR
Page 3 and 4: Precision control BY DEBRA CLEGHORN
Page 5 and 6: first in Static and then, after all
Page 7 and 8: 1/4-scale Fokker D.VIII John Fergus
Page 9 and 10: PARKZONE WILD HORSE P-51D The most
Page 11 and 12: GWS FORMOSA 3D The GWS line of spor
Page 13 and 14: GREAT PLANES MODEL MFG
Page 15 and 16: SUPER CHIPMUNK-BALLERINA WITH AN AT
Page 17 and 18: Air SCOOP Soaring the Neutral Zone
Page 19 and 20: "... from scale flying to high-iner
Page 21 and 22: The battery goes In this easy-to-ac
Page 23 and 24: "This is a UNIQUE, WELL-DESIGNED ST
Page 25 and 26: IN THE AIR The Beaver is a spirited
Page 27 and 28: Smokin' aerobat I HAVE ALWAYS BEEN
Page 29 and 30: ered balsawood block that is bolted
Page 31 and 32: "... The Uproar ARF is an excellent
Page 33 and 34: for attaching the adjustable engine
Page 36 and 37: THE DIGITAL ADVANTAGE On the outsid
Page 38 and 39: Mike McConville smiles for the came
Page 42 and 43: This turbine-powered Learjet is a b
Page 44 and 45: LEARNING TO FLY A HELICOPTER 0ft TR
Page 46 and 47: A new player in the "more power" ga
Page 48 and 49: ENGINIEREVIEW TUNED PIPES OFFER ANY
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Page 52 and 53: SCALE TECHNIQUES I-beam back and fo
Page 54 and 55: Nothing flies better than a well-tr
Page 56 and 57: HOWTO>THE ART OF AIRCRAFT TRIMMING
Page 58 and 59: "FLIGHT TRIMMING involves making ma
Page 60 and 61: On May 21 and 22, 2005, Air Age Med
Page 62 and 63: An electric powered jet that really
Page 64 and 65: This vacuum-formed canopy can be us
Page 66 and 67: Ted Ruffo holds up the second proto
Page 68 and 69: PRODUCT SLOFLY Prop Saver Flexible-
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Page 72: FINAL APPROACH BY MOLLY O'BYRNE > P

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