Radio Control: Sport and Aerobatics

Radio Control Sport Aerobatics Ron Van Putte WEL1 GUYS wanted fly times per day Nats got Well flying three days respective events should have no trouble getting least six flights Thats good news bad news Sportsman/Advanced flies July 12 13 14 Expert/Masters flies July 15 16 17 Besides frequencies allocated class some fliers arrangement will awk ward impossible flying buddy Sportsman youre Expert example Some people can take off few days Nats six days Pattern may too much Having change frequency will annoyance backbreaking expense some us will gripe about Another part good news will find out much sooner doing against competition because well flying nearly same time should know relative placing least other round size class will determine whether will face same judges round other round example Expert will probably have small enough number entries flown front set judges other hand Sportsman will probably have fly front two sets judges Pattern flying Lincoln Nats will held ito 8pm us like shoot bull late night sleep late morning will thrive Nats schedule Need less say Im Thinkin Lincoin already After person writes column like dry spells few ideas write about has way peri odically overthepast 12 years Whenithappens settle back realize four five years theres large new crop RC fliers have entered hobby fliers never read columns back early days Model Aviation ones recentiy five six years ago means new ideas few years ago still new recent group fliers reason youll read several different slants same topics over years dreaded Downwind Turn good example have no idea times past 12 years reader dredged up downwind turn No matter side argument problem exists its explanations phenomena differ Coriolis force another topic just real different explanations never heard Coriolis force Amer ican Heritage Dictionary defines Coriolis force fictitious force used mathematically de scribe motion aircraft cloud formations relative non-inertial uniformly rotating frame reference such earth Simplistically apparent acceleration airplane east flying south north northern hemisphere airplane actually does go east north-south line because motion earth rather action force acting However can dream up force accounts motion airplane flying northward southward relative fixed earth did bring up Coriolis force column Partly provoke some readers Im positive will insist Coriolis force real mostly point out explanations phenomena observe dont have correct useful flying RC airplanes example sooner later new pilot trying perform stall turns will told ex 48 Model Aviation Bili uennis lAmarillo IA WlTfl tne oniy real Beercat world Gee Does mean little just mirage Beautiful Sig Skybolt Mike Gailo Steubenvilie OH has Enya 60 power Pilot cockpit scratch-built Hobo plan May 1966 RCM has head turns planes rudder Daniel Phillips Whitesboro NY finished model after 17 yearn HIs wife painted Williams Brothers pilot figure perienced pilot turn stall turn performed crosswind should made wind because wind helps tail come around neatly explains cross wind stall turn doesnt works Unfortu nately its wrong explanation because airplane has no idea its crosswind Now believe Ive provoked still readers will insist Im wrong about cross wind stall turn Well its job provoke readers once way have unique method getting rid flies get car people scramble after beating windows getting frustrated walt knock themselves unconscious pick up throw out window get knock themselves uncon scious Its really very simple believe conservation total energy know thats concept upwind/downwind turn proponents use convince airplane will climb doing 1800 turn downwind heading dive 1800 turn upwind heading Still confused Total energy proponents say sum potential energy kinetic energy constant turn Consequently airplane going downwind will going faster relative ground airplanes airspeed amount equal wind ve locity Conversely its going upwind will going slower airspeed wind velocity Obviously kinetic energy going downwind far higher going upwind potential energy has increase turn downwind upwind keep total energy constant other words airplane has climb Now turn done rapidly climb must rapid fly doesnt understand techni cal things keeps buzzing around car So drive down road fast its legal Sooner later fly will go back car front downwind rapid U-turn upwind windshield Thats knocks himself unconscious climbing rapidly striking head roof car Simple understand high school physics isnt Isnt often read about competing companies getting along well agreeing anything heard about dilly potential problem worked out well because both companies acted responsibly press release Ive edited Sig Manufacturing Company describes situation Incredible Name Game During course bringing out new product always lot trial tribulation racking old brains come up catchy new name Hopefuliy will say something positive about new product well being descrip tive did however have slight problem name new iron-on plastic covering material UltraCote Well going call tried catalogs printed way too As may have guessed mail model magazines both Sig Carl Goldberg Models unknown other both busily working new iron-on plastic covering material problem both picked same great name UltraCote Now comes fun part first found out about just before TIM Show Pasadena received some Continued page 160 K U CESSNA 150 AERO BAT COSMIC WIND 1W Cox Hobbies new EZ Flyers perfect control line planes first time flyer Equipped famous Cox 049 engine newly designed snap starter get airborne flying fast After winning wings step up racy Cosmic Wind same easy starting Cox 049 engine insures lots exciting flight time See complete line Cox powered models accessories Hobby retailer today Enclose $100 SASE minicatalog COX HOBBIES 1525 E Warner Ave Santa Ana CA 92705 IMPORTANT PROPELLER SAFETY MESSAGE safety precautions designed enhance enjoy ment model flying should part modelers routine both flying site workshop 1 Select correct propeller size following engine manufacturers recommen dations 2 Before using plastic props remove flash along edges propeller scraping pocket knife 3 Install propeller using correct nut washer airfoil side forward securely tighten Recheck after flight 4 Use chicken stick electric starter start engine make adjustments behind engine 5 Keep spectators least 20 feet away out path rotating propeller 6 Wear safety glasses hand protec tion operating model engines permit objects touch turn ing propeller 7 To stop engine cut off fuel supply accordance manufacturers instructions case DO NOT stop propeller hand other object 8 Inspect propeller after flight Discard propeller has nicks scratches other visible defect DO NOT repair alter way modify propeller 9 We strongly suggest propeller tips painted order increase visibility turning rotating propeller can cause serious personal injury ALWAYS FOLLOW SAFETY PRECAUTIONS WINDSOR PROPELLER CO SANTA ROSA CALIF May1987 49 CARBON RODS Round re angular Extremely strong & lightweight solid rods continuous carbon fibers epoxy base Can used wing spars wing retention rods torque tubes & landing gear struts 050 Dia x 36 $ 550 x 24 00 1/16 Diax60 $1050 %Diax 12 $1100 070 Dia x 60 $1150 Dia x 12 . $1 700 h Dia x 60 50Is x% x 12 0 Dia x 12 . $ 600Vs x 0 1/16 X 1/16 X36$ 900 Add $300 S&H esidents add 6% sales tax seas orders add 16% check money order COO AEROSPACE COMPOSITE PRODUCTS PO Box 16621 IDept Irvine CA 92714 CONTIOLIII TEND PROFILECOMBA 7RA T WIDE & NARROW WEDGE 15 -- 6 oz Capacitie UNIFLOW & ITIIDD Uuutrn D1IDA 1111 Ingredients detailed brochutC50C stamps/check oni CAROLINA-TAFFINDER 8345 Delhi Road Charleston Hgts SC 29418 803-553-7169 CUTTING TOOLS BALSA STRIPPER Precision stripwood easy Master Airscrew BALSA STRIPPER Strips up 1/2 wide 1/4 thick can cut quickly accurately trom sheet stock ver nier wheel advances %2 per turn adjustment precise stripper comes standard type 11 hobby blade unconditionally guaranteed against failure five years S495 suggested retail Mco-*StabIe available dealer WINDSOR PROPELLER CO $7 $19 Some ships slso have Koku-Fan three-view drawings svailable Xerox copies three-views magazines other sources Bobs complete list over 400 Foto-Psaks available $2 plus long SASE address 2334 Ticonderoga Costa Mesa CA 92626 special arrangement Bob send long SASE address end column Ill send Xerox page contains Sailplanes Motor-Gliders Second International First US F3H Cross-Country Contest will sponsored Thousand Oaks Soaring Society TOSS July 9 through 12 event has both FAI AMA sanctions F3H rules will strictly followed site Taft CA weather advertised being hot very good lift annual contest TOSSbut first time American club has obtained FAI sanction full de scription F3H International events see Larry Jollys May 86 Model Aviation report First International Cross-Country contest held South Africa December 1985 Larry won contest nosed out Joe Wurts 1986 TOSS X-Country complete contest info write Chuck Griswold 1646 LaJolla Drive Thousand Oaks CA 91360 F3H Fanatics can warm up Second InterW1.i *sts 132 ea / RAZOR PLANE new Master Airserew RAZOR PLANE uses heavyduty industrial blade held place two locating screws allowing cutting depth set very rigidly accurately plane has variety uses ding smoothing contours fuselages cowlings shap ing edges thinning strips making custom-sized strip stock frame blade retainer made tough Lesan plastic should prove almost indestruc tible normal use$495 suggested retail 384 Tesconl Ct Santa Rosa CA 95401 national entering Santa Maria Soaring So cietys Seventh Annual X-Country June 6 7 single-launch event over 25-mile triangu lar course California Valley will big barbeque raffle Saturday night Contact Larry Turner 323 Noguera Place Arroyo Grande CA 93420 Third Annual Western US RC Soaring Championships will moved Merwin Ranch Modesto year Dates June 13 14 event growing countrys biggest decided Modesto way lodging dining did Courtland Also Modesto RC Club assuming responsibility whole shebang Get details Dave Darling 2705 Harvest Road Modesto CA 95355-3430 Byron Blakeslee 3134 Winnebago Dr Se dalia CO 80135 RC Aerobatics/Van Putte Continued page 49 promotional material Goldberg al ready catalogs printed about 2000 bound After about hundred phone calls between Hazel Dan Ueberman Goldberg conferring lawyers moans groans considerable con versation figured best thing could would sit back have good laugh must say have con troversy about name new product am glad Carl Goldberg Models Right off offered change name pull advertising Although both us well introductory programs felt would easier less expensive us change name product instead Now needed new name could continue introductory program Back fort hustled change catalogs resurrect already-sent magazine advertising tried conduct business normal Hazel Maxey boys job renaming new covering material finally came upon idea tying new covering material Supercoat Dope natural already decided match colors covering dope anyway So its back mundane ordinary life Sig have experimenting new cyanoacrylate glue lately need real good catchy name Maxey wandered other day suggested Ultra-Jet Hmm what think think people Sig Goldberg perfect examples fact treat everyone right maintain sense humor can make living hobby Ron Van Putte 111 Sleepy Oaks Rd Ft Walton Beach FL 32548 RC Old-Timers/Mathews Continued page 51 lives have absolutely no business out flying model airplanes three four days highheat/humidity weather tragic death such occurred last years SAM Champs points out too clearly such activities ill-advised types played tennis year round jogged some such regularly perhaps lesser hazard would present nature model-building activities us get littleif anyreally strenuous exercise such us go running around countryside heat summer chasing model airplanes truly fool hardy seems sort contest aimed old folks like us should placed south Continued page 162 NORTHEAST AEROD YNAMICS 61C LEBANON STREET ORD ME 04073 e 207-490-1881 TRAIN-AIR 20 TRAIN-AIR 40 SPORT-AIR 40 BEL-AIR 40 See local dealer call us referral 160 Model Aviation Leader Small Airfoil Technology MASTER AIRSCREW BEL-AIR 60