July, 2002 Vol
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July, 2002 Vol. 19, No. 7 U.S.A. $3.50 July 2002 Page 1 ABOUT RCSD TABLE OF CONTENTS /C Soaring Digest (RCSD) is a reader- written monthly publication for the R/C sailplaneR enthusiast and has been published since January, 1984. It is dedicated to sharing 3 "Soaring Site" ....................................................................................... Judy Slates technical and educational information. All Editorial ................................................................................................................. Cartoon Humor material contributed must be exclusive and original and not infringe upon the copyrights 4 "Tech Topics" .................................................................................... Dave Register Technical analysis & Design .......................................... Omen and Omega-E Electric Sailplanes of others. It is the policy of RCSD to provide accurate information. Please let us know of 8 "Have Sailpalne Will Travel!" ................................................................ Tom Nagel any error that significantly affects the Travel Sagas .......................................................... Converting a Chrysalis HLG into a Park Flyer meaning of a story. Because we encourage .............................................................................................................................The Chrysl-Stick new ideas, the content of all articles, model 10 NATS Coverage ..................................................................................... Lee Murray designs, press & news releases, etc., are the .......................................................................................Comments on the 2002 LSF/AMA NATS opinion of the author and may not necessarily reflect those of RCSD. We 13 F3B News .............................................................................................. Glenn Dean encourage anyone who wishes to obtain ...................................................................................................................... A View from Base B: additional information to contact the author. ............................................................................................................... The US F3B Team Trials RCSD was founded by Jim Gray, lecturer 16 Technical analysis & Design .......................................................... Gregory Ciurpita and technical consultant. .......................................................................................................................... Bending-Moments RCSD should not be considered to endorse any advertised products or messages pertaining hereto. An advertising rate card is available for businesses, and clubs. R/C Soaring Digest 556 Funston Drive Santa Rosa, CA 95407 phone: (707) 578-7871 e-mail: [email protected] http://www.b2streamlines.com/RCSD.html RCSD Staff Advertiser Index Jerry Slates - Editor/Technical Editor Judy Slates - Managing Editor, Subscriptions Lee Murray - RCSD Index/Database 6 Aerospace Composite Products 9B2 Streamlines (available on-line) 6 Cavazos Sailplane Design Bill & Bunny Kuhlman - RCSD Web Masters 18 Hobby Club PayPal Coordinators 6 R/C Soaring Digest OTHER GOOD STUFF 19 Classified Ads Feature Columnists Special Interest Groups - New Products Bill & Bunny Kuhlman (B2), 19 Eastern Soaring League (ESL) 3 Schedule of Special Events 19 International Scale Soaring Assoc. Lee Murray, Tom Nagel, Mark Nankivil, 19 League of Silent Flight Dave Register, Steve Savoie, Jerry Slates, 19 Sailplane Homebuilders Association Greg Smith, Gordy Stahl 19 T.W.I.T.T. 19 Vintage Sailplane Association Artwork Gene Zika is the graphic artist RCSD ON THE WEB who designs the unique ZIKA clip art. http://www.b2streamlines.com/RCSD.html Monthly Feature Photography & Web Version of the Printed Article (where appropriate) Highlights & Mailing Status of the Current Issue About RCSD ..................................................................................... Subscription Information ................................................... Advertising Rate Card (Adobe Acrobat PDF format) ............................................. RCSD Feature Columnists, Reporters, and Editors ....................... (E-mail/web addresses, plus general information about their areas of interest) "Getting Started in RC Soaring" ........ Getting started guide - Adobe Acrobat PDF format Links to Organizations, Special Interest Groups & Clubs On-Line Articles - Great articles originally written for the printed version of RCSD. ........................................ "Trimming Your Sailplane for Optimum Performance" by Brian Agnew .................................................................................................. "Flys Faster" by Dr. Michael Selig .............................. "The Square-Cube Law and Scaling for RC Sailplanes" by Dr. Michael Selig .................................. "Modifying & Building the MB Raven (Parts 1-4)" by Bill & Bunny Kuhlman Copyright © 2002 R/C Soaring Digest. Bookshelf Listings - A listing of recently published books of interest to aeromodelers. All rights reserved. Complete RCSD Index, 1984-2001 Page 2 R/C Soaring Digest The Soaring Site Cartoon Humor ope all of you enjoy the 'toons Thanks for your patience and under- included in this issue of RCSD. standing! Enjoy! OurH thanks to the talented Gene Zika and Phil Bauer! And, don't forget that cover photogra- phy is available in full color for Cajon 2002 I'm still having quite a few computer downloading from our web pages. problems, but neither rain, sleet, snow, an Sampson’s Sukhoi Su-25 or tornados have stopped us from Frogfoot tank-killer. Built Happy Flying! fromD Carl Maas molded fiber- enjoying this wonderful hobby and, Judy Slates glass fuselage, balsa sheeted foam with this issue, it catches us up another wings. month! Photography by Dave Garwood, New York. GONE OOWW !! SOARIN' ZIKA PP I SEE YOU'VE DECIDED TO TRY SCHEDULE OF SPECIAL ELECTRIC EVENTS FLIGHT! October 18-20, 2002 Deep South Soaring Championships Houston, TX http://home.houston.rr.com/kovacs/hawks/deepsouth.htm February 1-2, 2003 Southwest Classic Phoenix, AZ Please send in your scheduled 2003 events as they become available! 18 eautiful in full color, all cover photographs are availableB for downloading from ZIKA the RCSD main web page. July 2002 Page 3 TECH TOPICS Dave Register hour to spare, one or two battery packs The fuselage is unpainted fiberglass Bartlesville, Oklahoma will fill the bill nicely. with a gelcoated canopy. The trim and [email protected] fit of the canopy was excellent and the Which leads us to a review of the fuselage finish was virtually free of pin Omen and Omega-E designs from Sal’s holes and surface irregularities. A light Omen and Omega-E shop (Northeast Sailplane Products). rub down with solvent would prob- Electric Sailplanes The way this all started was helping a ably be sufficient prep for any addi- young pilot (Andrew Geibel) put tional painting. ver the past year there hasn’t been together the Omen and then realizing much time for soaring at the that this type of ship was a heck of a The push rod jackets are preinstalled RegisterO household. When you don’t lot of fun to fly! and metal pushrods of more than have a lot of time to spare, HLG/DLG sufficient length are supplied. A beefy is a great way to get some exercise and The Omen uses a geared Speed 400 plywood servo try is supplied with the stick time without a lot of parapherna- with a 11 x 8 Graupner folding prop accessories. The wing mounting plate lia. But after you’ve pranged your last and a 7 or 8 cell Sanyo pack. A Sun is already installed, drilled and tapped. DLG, or you’d like a few long flights 1000 unit provides the BEC/Throttle The Omen used metric nylon bolts, the after work, what’s a soaring pilot to function. The Omen planform is Omega-E used English (8-32 panhead). do? I’d highly recommend the new polyhedral with ailerons and a V-tail. I re-drilled and tapped the mounting class of smaller electric sailplanes that The planetary gearbox on the Speed plate for English 10-32 panhead. run on geared Speed 400 motors. If 400 makes for a sleek front end and the you stick with a 500mAh, 7 or 8 cell overall performance was impressive. The wings are pre-built and covered pack, the cost is very affordable. and a suitable length extension cable After getting Andrew up and flying, I out to the servo wells is provided. All The beauty of these systems is that really wanted to give this a try but I connectors, linkage and hardware are they are compact enough to fly safely also wanted flaperons for camber supplied. The V-tail is glass over foam in a decent athletic or soccer field changing ability to help with the low (built up geodesic balsa in the case of (PLEASE have your AMA insurance end of the speed envelope. A quick the Omen) and uses the upper surface just in case), they’re nimble enough to look through Sal’s website found that glass for the hinge (Omega-E only). jog around the occasional tree when the Omega-E matched all my require- This hinge is too brittle and won’t landing and they’re light enough to ments. stand up very well, so a strip of clear not be a serious threat if something hinge tape was applied. goes awry. In addition, the onboard Construction of both the Omen and launch equipment and soaring ability Omega-E is very similar so I’ll high- The V-tail is sufficiently light that CG of the more recent designs can give light the most recent experience balance is not a problem. For