oaringRadi C ntr lled igest SFebruary 2009 Vol. 26, No. 2 D February 2009 Vol. 26, No. 2 Front cover: Jorgen Nederland's EPP plank scoots along the Rodvig Slope in Denmark. Wing cores with the MH45 airfoil were cut by Adam Rogalski. It has a 1.6 meter span and 1.0kg to 1.5kg flying weight, depending on ballast. Photo by Morten Enevoldsen Canon EOS D30, ISO 400, 1/320 sec., f8, 105mm CONTENTS Eaton Air RC Bad Voodoo ODR 49 A well designed One Design Racer with exceptionally 3 RC Soaring Digest Editorial good performance and an ability to take abuse. By Alex Paul with photos by Dave Garwood 4 Magnum Models F-5 Tiger A realistic 32.5" span scale sloper with good flight The Tool Room characteristics and the ability to to do well in relatively Bosch PMF-180E 56 light lift. Review by Dave Garwood with additional flight The first of a series of four articles reviewing reports by Joe Hosey and Alex Paul multipurpose oscillating tools. By Lothar Thole 14 Midsummer slope soaring trip... New FAI F1N Record Volksrust 2008-2009 65 As mentioned in the January Editorial, Mitsuru Ishii, Piet Rheeders recounts his old year/new year week at Japan, broke his previous indoor free flight hand-launch Tamatie Berg with other RC slope soaring enthusiasts. glider record by more than ten seconds. Here are more The highlight of this trip was the maiden flight of Piet's details and plans for the record breaking glider, courtesy Aero Commander. In-flight photos by Izak Theron Kurt Krempetz/<http://hosted.schnable.net/amaglider/> 21 Volksrust 2008-2009 A scrapbook of photos of the week-long Tamatie Berg event. Twenty pilots brought a wide ranging selection Back cover: Mike May's Ventus 2AX overlooks the Tamatie of scale gliders and PSS models, some extremely large. Berg slope on the first day of 2009. Photo by Izak Theron Photos by Izak Theron and Piet Rheeders Canon EOS 450D, ISO 400, 1/640 sec., f8.0, 18mm 2 R/C Soaring Digest R/C Soaring Digest In the Air Managing Editors, Publishers B2 Kuhlman Contributors Dave Garwood Joe Hosey Kurt Krempetz Alex Paul e survived the severe weather of the latter half of Piet Rheeders WDecember and we thoroughly enjoyed a white Christmas. Izak Theron Lothar Thole Our inverter and winch battery, together with intact ’phone lines, kept us up and running during the two daylight hours we were Photographers Morten Enevoldsen Dave Garwood without power. The RCSD offices are located on a very stable Alex Paul sloping hillside, so we didn't have the flooding problems which Piet Rheeders plagued those at lower elevations, nor did we slide downhill. Izak Theron Lothar Thole Thanks to everyone who expressed concern. The forested area in which we live does have its hazards, however. The very cold Contact [email protected] Web: http://www.rcsoaringdigest.com snow, followed by rain, weighed down tree branches and in Yahoo! group: RCSoaringDigest some cases brought down the trees themselves, to the point AIM screen name: RCSDigest where a loud "crack," "bang" or "thud" was frequently heard. Microsoft Messenger: rcsdigest We had a metal roof installed during the early part of the year, and the sound of large sheets of snow sliding onto the deck ———————————————————— was very much like a freight train passing overhead. We've R/C Soaring Digest (RCSD) is a reader-written monthly publication for heard people say the Farmers' Almanac has us scheduled for the R/C sailplane enthusiast and has been published since January a similar experience in February. Hopefully we'll survive the 1984. It is dedicated to sharing technical and educational information. second round as well as we did the first. All material contributed must be exclusive and original and not infringe upon the copyrights of others. It is the policy of RCSD to provide You'd think with being pretty much snowed in for nearly three accurate information. Please let us know of any error that significantly weeks that we would have managed to at least start a building affects the meaning of a story. Because we encourage new ideas, the content of each article is the opinion of the author and may not project, but such was not the case. We did, however, manage necessarily reflect those of RCSD. We encourage anyone who wishes to construct a very cool hot wire system with the Powerstat to obtain additional information to contact the author. variable transformer we picked up from Merrill Brady (MM Glider Tech) at Visalia in October. That'll be the subject for a Copyright © 2009 R/C Soaring Digest future RCSD article. Published by B2Streamlines <http://www.b2streamlines.com> P.O. Box 975, Olalla WA 98359 Our thanks to Izak Theron for the Contents page cloud photo! All rights reserved Time to build another sailplane! February 2009 3 Magnum Models NORTHROP GRUMMAN F-5 TIGER by Dave Garwood, [email protected] 4 R/C Soaring Digest ot many gliders grab your attention I first saw Larry Blevin’s F-5 Tiger slope - Carbon fiber tube for wing spar Nlike a sharp-dressed slope jet. And jet fly in 2003, and so have known since - Pre cut, high grade balsa ailerons, when a cool looking PSS glider flys well, that time that the model looks great vertical fin, horizontal stab and elevator the slope pilot is in a very happy place. and flys well. I built mine early in 2008, - Several small plywood parts, pre-cut I’m here to tell you that the Magnum to have it ready for the Midwest Slope - Hardware package: nylon mounting Models F-5 Tiger is a great-looking and Challenge in May, and in order to join up bolts, threaded rod, clevises, control a fine-flying glider, supplied in a kit that’s with a couple other guys planning to have horn, elevator pushrod and aileron torque simple to build quickly and successfully. F-5s ready for the spring event, including rod assembly. The F-5A Freedom Fighter was designed OFBs Alex Paul and Joe Hosey, plus Mr. - 12 page instruction manual; includes by Northrop in the 1960s to be a light Magnum Models himself, Larry Blevins. three drawings and inexpensive supersonic fighter. A While not an ARF, the Magnum - Later versions of the kit include a highly successful design, they have Models F-5 Tiger kit provides a build molded clear canopy. been flown by more than 30 countries that proceeds without problems, and Additional Components and Materials and hundreds remain in service today. produces a slope jet that flys well. My radio installation included an An improved version, the F-5E Tiger II For me, there’s a special pride and Airtronics 92515 Super Micro Receiver, serves today with the US Navy, including satisfaction that comes from researching a pair of very small Airtronics 94091 some in “enemy” paint, glown ny and modeling a color scheme that you’ve servos, Airtronics 95009 300 mAh square “aggressor squadrons for air combat selected personally - I do like that part battery pack, and an Airtronics 97001 training. Later F-5 development included of the project. See the resources listing switch harness. These are tiny servos, a reconnaissance version, the RF-5 at the end of the article for sources of about the size of the on/off switch, and Tigereye. photos of the prototype. they worked fine for ailerons and elevator The T-38 Talon, first US supersonic Kit Contents actuation in this model. trainer, derived from the F-5, has been Your $79.95 cost buys a complete kit, Supplies and material used included flown by the USAF Thunderbirds and which includes: Goop glue, Elmer’s Probond (to secure other aerial demonstration squadrons, - EPP foam fuselage, 1.9 pound density, the spar in the wing slot), epoxy, light and remains in USAF service today as a three pieces cut and joined at the factory spackle (drywall filler, for a smoother trainer. The single-engine F-20 Tigershark - EPP wing, 1.9 pound density, three finish on the EPP fuselage), 3M-77 evolved from the F-5 design, but did pieces to be joined by the builder, and spray adhesive, filament tape, a roll of not reach production. With the F-5 and CF spar inserted Ultracote covering, and small bits of T-38 flown by 30 countries and five air - EPP exhaust nozzles. These and all Ultracote covering for canopy markings, show teams, we have an abundance of foam parts demonstrate extremely national insignia, and intake and exhaust prototype paint schemes to choose from accurate foam shaping. markings. when finishing a model. Dave Garwood’s Magnum Models F-5 Tiger, flown over Wilson Lake at Minooka Park hill in medium lift (10-12 MPH winds). Joe Hosey was on the sticks; Dave Garwood behind the camera. February 2009 5 Construction Building the model follows well established foamie building practice, with materials selection striking a balance between light weight and durability. First for me was attach the wing parts end-to-end with epoxy, and fit the CF tube spar in place with Elmer’s Probond, and fill the slot with spackle. I decided I could make my plane a smidge lighter and assure a snappy roll rate if I built full-span ailerons, so I shortened the torque rod assembly provided. I carved the fuselage using internet photographs of the plane for guidance. I outsmarted myself on the receiver battery pack selection, selecting a 200 mAh pack and planning to mount it far, far forward to save overall weight over the recommended 600 mAh pack.