T URNIN AND BURNIN Thats what slope racing about tumin hard fast burnin down straights next pylon what consider pinnacle RC soaring models often travel well excess 100 mph during commencement dive start/finish gate Also sleek race models will fly wing tip wing tip averaging better 70 mph duration race addition what other form modeling tasks race models penetrating winds exceed 40 mph carrying five pounds lead wings None simply nothing like Unlimited Slope Racing model aviation Only best soaring pilots participate best come out winners rest just go real fast love minute Now news comes way 1993 slope soaring season promising racers some big-time racing clubs like California Slope Racers new Pro-Am Slope Racers Unlimited clubs hosting major events California Slope Racers promising racers International Slope Races new Pro-Am Slope Racers Unlimited up northwest corner US announcing its total dedication slope racing interested slope racers hosting 1993 Mid-Columbia Cup Slope Races MCCSR MCCSR offering unlimited racers both cash purse chance race under two-man rnles developed 1992 cash purse year $1000 firstplace winner additional cash prizes second third second- third-place awards will depend amount entry receipts new two-man format outlined July 92 MA column affords racers style unlimited racing much less prone midair collisions Pro-Am Slope Racers Unlimited expects new format pit best against best unlimited racing may interested know unlimited racer model carries maximum wing loading 2451 ounces per square foot and/or weighs maximum 11023 pounds new format deviates slightly now-standard four-models-in-a-heat arrangement allow two models racing per heat Additionally rules adopted Pro-Am Slope Racers score races line internationally recognized FAI events Although races still man-on-man MOM scored percentage perfect heat round similar F3F Therefore emphasis speed model able complete racecourse As result pilots challenged compete racers time models enter heat So main difference scoring follows 104 Model Aviation HO CONTROL SLOPE SOARING Conrad excited about flying dad Joseph also happy show oft dads model Dennis Gray demonstrates fine art tossing home-brew wingeron sloper brisk breeze Mike Brown shows off sleek quick V5 Sailplanes Rotor Dean Farnham shows us nicely detailed model conglomeration design ideas likes Hosted Torrey Pines Gulls California Slope Racers May 1-21993 Toney Pines Gliderport La Jolla CaliFornia Seven Rounds Unlimiled Sbpe Racing applicable AMA rules apply Big BBO night fly cliff Saturday night Dnt miss J Percentage-of-perfect heat scores 1 Fastest time awarded 1000 points 2 Second awarded 1st place time/2nd place time x 1000 3 DNF Did Finish awarded 100 points 4 DNS Did Start awarded zero points Percentage-of-perfect round scores 1 Fastest round time awarded 1000 points 2 Other round finishers awarded points fastest round time/respective round time X 1000 example [Fastest round finisher 13 l]I[ 142 r finishers respective time] x 1000 points 3 DNE receives 50 points 4 DNS receives zero points A025 H complete rules published February 1992 issue RIC Soaring Digest can get detailed information rules entry form MCCSR sending SASE Pro-Am Slope Racers Unlimited 606 N White Walla Walla WA 99362 may also give Contest Directors Joe Conrad Roy Lightle call 206 630-2670 509 525-7066 respectively See hope BKwKN NP SE 1/4 PYWDDD DR EDUIVAENT FDR STAND AND 4Th BRACES V025 END VIEV SILL VILE TEE VIEoJ PI -o2S P Left balance stand simple device built -in plywood Below airfoil month Selig 6063 section thin 706% section provides low profile drag May1993 105 ml enirypa&age ormwe dannaiion cci Slew Condon 0 619594-7821 Notice sturdy mounting brackets Cope retract well superb detail hinge points 4 Aviation Software for Modelers Model Pilots Logbook MaIntain record modalng Input dates weather condlilone modeln number Illghta made mid notes SummarIze flyIng acliviilse juat aelected model veralona avalable bout power model mid eanplane pflota Easy use menu dstven QalyJatE Airfoil Designer Oraphicaly display stuidud airfoIl shapes Specify airfoil type thicimees andor chord width model dee~ create tapered wing deelgna dli ferentairfoll shapes stute root mid tIp Graphics can output CAD visa DXF pointers plotters Easy use VGA graphIcal QniyI3LM spoly ilk ate abs Nsch Saud check 4 moesy ardta IDU Software L SL Uncoil, NE mio SIG MANUFACTURING CO now imports complete line world record holding ROSSI aircraft marine helicopter race car engines includes full line parts accessories plus full time ROSSI REPAIR CENTER US SIG-im ported ROSSI engines come full 90 day SIG WARRANTY against work manship manufacturing defects SIG MANUFACTURING CO INC . Montezuma IA 50171 PH 515-623-5154FAX 515-623-3922ToIl Free Orders 800-247-5008 Discovery Park Thanksgiving normally weekend obligation simply means have stop doing model airplane stuff usually occupies much spare time dedicate time family food wine thanksgiving year somewhat different pastand happily Yes still above year took family Seattle Thanksgiving dinner brother-in-law sister-inlaws home food great fun playing kids however six hours TV football bit excessive way thinking Friday following Turkeyday bet wished buzzards fortunately found us slope site just two miles in-laws As know Seattle hilly city also known its rain trees evergreen trees isand grow everywhere Well Discovery Park located just couple miles north downtown Seattle few places haired over trees also area sports nice cliff approximately 200 feet high faces southwest Since wind weather usually blow southwest Discovery Park ideal area slope soarers frequentand first outing Discovery Park back 1976 friend introduced slope soaring moved Seattle 1979 Tn-Cities havent flown site since Well flying sites Discovery Park has become much crowded both model fliers spectators Discovery Park now offers place individuals walk picnic fly kites slope soar generally just have fun Before hear about great models flying site want mention people watching high-powered models zoom overhead kinda frightening since usually fly Eagle Butte attracts mostly fliers spectators because Eagle Butte mostly fliers spectators models usually arent zooming over heads spectators So saw number spectators happily watching models whipped over heads brought about certain feeling concern flying site flying shared sites might wise remind ourselves zooming models have great deal energy stored speed through air Because stored energy could very harmful anyone might hit Think about four-pound model traveling 100 mph damage model could hit someone would certainly affect flying site very well could hurt someone seriously further emphasize much energy stored model lets look results calculation kinetic energy model similar described above formula /2 my2 numbers add up 1344 foot-pounds energy lot isnt Now what would 11-pound slope racer have stored it zooms 120 mph about 5324 foot-pounds So its probably worth being careful courteous always thinking about model respect spectators other fliers After attorneys arent cheap models gracing skies above Discoverys cliff day family visited mostly wingeron ships Sig Samurai VS Sailplanes Rotor home-brew design based leftover VS Sailplane parts another home-brew much like VS Sailplane Chuckar Russian Yak Bob Martin Bob Cat number other models made trek out slope didnt fly wind bit too brisk models either too light conditions modelers confident enough toss sometimes-turbulent air havent seen wingeron wingevator airplane fly quite interesting First lets explain what wingeron plane model simply moves wings effect roll control wingevator glider model has fixed-incidence elevator moves wings effect both pitch roll other words wing incidence decreases effect down elevator rises increase incidence between wing elevator effectively creating up elevator type model known its maneuverability VS Safiplanes designs also noted speed penetra tion day no exception wingeron machines airfoils models using pretty much similar using Eppler 374 modified E-374 now-popular SD-6060 airfoil sections have moderate mean camber line therefore have very modest pitching moment can also penetrate wind need Airfoils like 374 6060 capable performing nice aerobatics pilots skill allows interested wingeron wingevator models suggest contact VS Sailplanes Sig Manufacturing information address VS Sailplanes 723 Broadway East Seattle WA 98102 telephone number 206 860-7711 Sig Manufacturing located Montezuma IA 50171 telephone number 515 623-5154 Cope Retracts now offers what doubt true-to-scale retract available RC scale soaring pilot anywhere world retracts designed built Gene Cope Gene scale RC soaring enthusiast simply could find retractable landing gear accurate enough scale detail satisfy taste Genes answer manufacture own copying design full-scale Kestrel 19 efforts resulted absolutely true scale landing gear accurate detail rugged enough withstand roughest landing 11-pound scale model Cope retract made 4130 steel tubing silver brazed together building jig building gear system jig Gene assures retract will accurate true Thus gear operates smoothly surprisingly little torque Continued page 17S 106 Model Aviation S ON PRO-BOW THIS UNIDUEDEVICEALLOWS YOU TO CUT ACCU RATE WING CORES WITHOUT EXPENSIVE AND COMPLICATED EOUIPMENT WITH THE PRO-BOW THE CUTTING WIRE IS GUIDED DIRECTLY AT THE TEMPLATES BY HAND HELD INSULATOR CLIPS THE HEAVY-DUTY CONSTRUCTION GIVES GOOD FEEL TO THE BOW AND WITH THE ADJUSTABLE HEAT PROBE THE WIRE TEMPERATURE CAN BE CONTROLLED FOR PERFECT CUTTING RESULTS sale $4295 VISA & MASTERCARD ACCEP TEDADD $500 SHIPPING IN USAIL RESIDENTS ADD 7% TAX WING MFG 306 E SIMMONS GALESBURS IL 61401 CALL 309-342-3009 WORKS DIRECTLY OFF OF 12 VOLT BATTERY OR 10 AMP BATTERY ThdGER S COMPLETELY ASSEMBLED STRAIGHT DR TAPERED CORES IAL PASSIVE RESISTANCE CUTTING WIRE LATED STEEL FRAME CUTTING TECHNIDUES & OPERATING INSTRUCTIONS INCLUDED UP TO 41 SEND $500 FOR 60 PAGE CATALOG straight no tendency snap roll drop wing tip 3 slow ground speeds difficult turn model steerable nose wheel individual main gear brakes 4 ABS skin does vibrate excessively regardless engine rpm 5 Theoretically model should fly well 34 pounds hut have yet test theory 6 Elevator trim changes required flaps activated 7 Landings docile 200 400 flaps Forty degrees flap quickly slows plane greatly increases rate descent 8 No control flutter encountered 9 aircraft will spin CG less 20% full control travel CONCLUSIONS project would have successful help encouragement individuals organizations strongly recommend modelers patronize manufacturers distributors mentioned article Further wish thank flight assistantsGus Rebensburg Jerry Reichow Duncan Stewartfor time effort Based test results am now con fident feasible develop full-scale Snipe As am detail-designing big Snipe will continue use -scale model test different features building techniques cant wait get started bending tin summer 1998 Ill let know full-scale aircraft flies leads final question build full-scale model prototype -scale aircraft can enter sanctioned AMA scale contest lope SoaringlByors Continued page 106 required servo fact typical microservo will extend retract landing gear well open landing gear doors Gene has also designed over-center system retractable landing gear landing no force transmitted servo might strip servos gears over-center system also works retracted mode wheels inertia cannot throw gear out open ruggedness retract system surprising Gene has tested gear design doing push-ups install gear builder custom-fits fuselage between two bulkheads installation method serves two purposes First bulkhead mounting provides very rugged attachment inside fuselage gear cannot broken loose landing impact mounting system lets builder adjust depth wheel extension through fuselage Now meticulous scale builder want best retractable gear money can buy Cope retract probably worth considering Gene offers retract two sizes has -scale version currenfly priced $125 Cope also offers supersize -scale retract will handle really big birds tells sometime not-too-distant future will offering -scale model too Cope Retracts can contacted 32031/2 Main St Union Gap WA 98903 telephone number 509 457-9017 modelers friends contacted during month Mr Darrel Johnson Mesa Arizona suggested discuss balance models Well perfectly honest sometimes just mount model atop left right index fingers quick dirty Other times ever procedure bit exacting use balance stand balance stand simple device can built just few minutes aid good old Hot Stuff similar product stand built -inch plywood other plywood approximately size drawing outlines construction shows supporting fillets keep stand breaking large load applied drawing also details round edge stand upon model placed reason use stand quite obvious want obtain balance point model accurately possible stand much easier Using fingers balance model turns procedure somewhat juggling act However can place model stand make weight VIDEO_____ JOY OF FLYING FREE very informative 42 minute VHS video displaying phenomena free flight its variations great PR video can used effectively educate uninitiated art model aviation video professionally produced National Free Flight Society features both indoor outdoor activity available NIFFS 1655 Revere Drive Brookfield WI 53045 * Include Check $2500 plus $300 P&H per tape Buy 4 VgPEOS FREE #17 92 SCALEMASTER CHAMPS STAR MUS PIMA AIR MUS ALABAMA 2 Hrn.$1995 #16 AIRCRAFT GUNTERSYILLE AL AVAL AIR MUS PENSACOLA FL 2 Hn.51996 #1 592 WORLD SCALE CHAMPSAMA INVTL SHOOTOUT W INTL SCALEMASTERS 2 Hn.$1995 #1492 NW SEAPLANE CHAMPS EN SCALE AVIATION IN AUSTRALIA2 Hm.$1995 3 op Gun Invitari oledo Model topo s Air Museum2 Nra. 51996 #12- 91 Scalemasters tao Vegas 91 DSAA Las Vegas 91 NWlntl2 Hre.$1916 C #11 Scalemaster Aircraft Preview Mfg Visdw1tlan Parsons- 91 NWteaplanethamps 2 Kn.S1996 Z#1O 91 Tup Gun W Palm Bch Fl SsA Lao Vegas W Model topu2 Iin.$1996 90 Scalemasters Champs Irving TX hidbey 101 Scalemos5ers an Diego Aerospace Moo 2 Hra.51996 90 NW Intl Scalemasters Farragot Park-Athol ID m Champlin Fighter Museum w/tou Proctor W Seaplane ps Santa Monica Mos Flying 2 Mn. 51995 #7 op Gun Invitational Mesa AZ W Model Eupo2 Hrs.$1995 #6 89 Scalemasters Champs St Louis ake lianaso m Schneider Cop Races2 IIrs.$19gG 89 US NaIls Scale & Seaplanes 89 NW Seaplane Champs Planes Fame taut Moo Moo DshkoshVisit mw/Ralph Beck Chicago Mo Sci & Ind 2 Hs.$1995 #4 09 Top Gon Champo Coral Springs FL tor Albatroo DVA Preview atIs Seaplane Site NW ntl oScalemasters tor N-li Test Flight 2 Hre.S1I96 IA Special Edition Proctor Enterprises Atbatroo OVA Brief Conotr Engine Radio Irrntall& Teat Ftigbto 2 Hra $1996 Cuetias JN4D Jenny Plan FUN SCALE 109 inches 1804 sq 11 lbs 8 sheets w/instroctions 51996 10807 SE STACY CT PORTLAND OR 97266 PHONE 503653-25780 FAX 503 6781342 SEND STAMP FOR COMPLETE LIST PAL & SECAM ORDERS CONCEPTS 17 MILPERA CRESCENT WANTIRNA VIC 3152 AUSTRALIA e 03801-3899 03887-3472 BETA CARLSON ENGINE IMPORTS 814 East Marconi Phoenix AZ 85022-3112 IMPORTED DIESEL ENGINES Worlds Best Selection AE AM Aurora Cipolla D-C KMD MAP Mikro MK MWS Oliver PAW Pfeffer Silver Swallow USE Also Replica Mills MOVO Letmo diesels rare imported glow engines CO motor sets Ten page catalog 1 00 May1993 175 visaBJrn/c ELECTRONICS WE HAVE OVER 26 YEARS EXPERIENCE IN &C AT WE 1466 windward dr mason ohio 45040 ph 513 398-5423 KS METAL Aluminum/Brass/Copper Tubing & Shapes Music Wire 0 Tools Soldering Irons Silk Silk Span Finishing Materials SEND $100 FOR PRICE USIMfI CATALO KS Enginwing 6917 W 59th Street Chicago IL 60638312/5868503 adjustments quite easily Also once balance point suits flying style obtained mark can easily transferred model reference should also pointed out uprights stand three inches wide making wide pounds per square inch exerted balance point bottom wing lowered uprights wide enough small balance points model will sit during balancing process can dent wing Make uprights wide enough reduce pounds per square inch will impart wing obtaining accurate balance point model should consider balancing being performed flying site balance usually accurate unless wind calm case what doing slope inaccuracy occurs because wind pushes model around models nose jumps up down other hand balance calibration shop no air movement can quite accurate type balance provides modeler chance add just right amount weight nose aircraft either teeters balance mark just slightly droops its nose Hope little idea will help get aircraft balanced just right you will discover much pleasurable previously unruly model fly Airfoil month month want share Selig 6063 section section computer generated Michael Selig especially glider fliers have speed running through veins quite thin thickness 706% provides very low profile drag rather telling about would like quote Michael Michaels comments paper sent after 1990 Mid-Columbia Scale Fun-Fly paper titled Three New Airfoils Designed Slope Soaring paper Michael says request several people met past May Tri-Cities Scale Fun Fly have designed three new slope soaring SUNGLASSES 195 100% UV Protection Shatterproof Excellent Optical Quality Tints Fit Over Prescriptions SKYS RO BOX 1000 UMFRIES VA 22026 800-227-9318 airfoils spin-offs 5D6060 common find sariplanes airfoil names like modified E205 E374-9% thinned E374 Certainly slight modifi cation original airfoil will devastate performance modified airfoil will no longer retain favorable characteristics designed original typical modification would scale airfoil y-coordinates some fraction order reduce thickness simple scaling does operate properly airfoil velocity distribution itself derived boundaiy-layer considerations airfoil design process particular airfoil thickness desired requirement best achieved during initial design effort order retain favorable boundary-layer characteristics simultaneously matching thickness specification S6061 9% thick airfoil along lines 104% thick 5D6060 drag predictions made using Drela XFOIL code incompressible version ISES code used aid design SD airfoils presented Soartech #8 Using Princeton airfoil data base found XFOIL code does predict low-Reynolds-number airfoil performance fairly accurately can used compare airfoil designs comparison made constant Reynolds number R0 typically done instead R0 times square root C1 00 Thus Reynolds number varies 1/Square Root C1 C1 decreases R0 increases visa versa can shown such variation R0 follows aircraft flight case Cd plotted corresponds aircraft flight Since constant 125000 aircraft flying C1 ould have R0 00 typical slope soaring aircraft S6061 9% thick section Michael also computer generated compared S6063 7% thick section thinner airfoil produces lower drag Also width low-drag range reduced decreasing thickness Since airfoils intended mainly slope soaring lower limit polar Continued page 180 ZENOAH & OIJ ERCOUPE & J- KITFEN iui ZINGER PROPS CARBON FIBER B&BPRODU DU-BRO GIANT SC 510 ECONITE REIDS 16 MaIn St Phelps NY 145Z 315-548-3779 176 Model Aviation UNE METAL SPECIAUSTS Renogniad Ceflit ledA Aedetset File No____ File Nof Pomer P26226 LR251 64PdOOtS Itto Only certified checks o money orders accepted Minimum otder 614SOfortheepackagesof4 PomerpoleslgdOiperpackage $200 Shipping handlingi CT residents add sales tao Pices suhject change notice DEALER INQUIRIES INVITED furthe information dealer prices send SASE Rosiness Card SERMOS R/C SNAP CONNECTORS Inc Cedar Corners Station Box 16787 Stamford CT 06905 203 322-6294 GATOR TRANSMITEER CASE feather lite GLASS CLOTH 7 az/sq yd weight close weave makes glass cloth easy filling extremely light finished weIght Big 3 sq yd package detailed instructions$895 50FF-N-SAFE MOUNTS new type engine soft mount using special ribbed Iso-damp grommela Engine always safely retained Vesy effective vibration reduction dramatic decrease engine shake Available vely light machined alum beam mount 60 2/strokes 120 4/strokes Also available alum plate radial mount 60 2/strokes Soft-N-SaIe 120 beam mount complete.S2995 5SoftN Safe 60 beam mounl complete..S2495 5SoftNSafe 60 radial mount complete.S129S Replacement grommets 120 mount.A/495 *Replacesnent grommeta 60 mount 4/295 RADIAL ISO-MOUNTS Conventional plate type mount using four Lord/type 60 Duro Iso-mounts Optimized lowest vibration transmission airframe reduced engine shake 60 Radial Iso-mount complete mount..S1495 5Isomotiits Pkg four 995 5/8 dia x 1/2 long 8-32 female end 832 x 1/2 male other end 60 Duro rubber RC Slope SoaringlByers Continued page 176 held fixed near C1 approximately equal 00 upper limit dictated indi rectly airfoil thickness requirements What think Maybe should give S-6063 try some really hot straight line passes Yeah yeah know careful Thanks again reading column Please pass along ideas adventures shared rest slope soaring community urationlMurphy Continued page 108 afford added weight on-off toggle switch DT-fuse-actuated microswitch keep power off until model DTed added weight easily compensated removing weight elsewhere model such lighter wheels lighter batteries lighter coil other such belttightening steps Since SAM-legal model must weigh mimmum 263 ounces anyway added weight provided littleif anyhandicap model performance Remember what said beginning Systems selection will also depend intended application Some may question DT-actuated devices mere battery savers sacrificing use flyaway situations DT fails function suppose could argue 10 miles off course well out sight model couldnt hear device operating worst out cost model plus small amount have invested system Conversely 10 miles off course out sight model carrying $125 electronic transmitters chances going get back via model-finder system either Thus out additional $125 rather 10 spot Well much what-if scenarios about enough verbiage model finders session will cut off until review another system two next F send *100 illustratsd catalogue 0warbirds 39 inch span 70pawered slope gliders sliders 1930s Telephone 714 77541530sailboats trio macas PO BOX 1249 MINSTER CA 92684-1249 time Remember columnist welcomes information effective system available modelerswhether commercial cottage industry brainstorm sourcesthat would justify review series reports Keep cards letters coming folks thank ye kindly New publications catalogs Terry Rimerts Fly-By-Night Press has issued its third plan book Nostalgia Gas designs aptly named Third Nostalgia book contains reduced-size plans designs era accent 1/2A designs such Kiwi Frank Garcher s Midwest Fortastrop Samuelson s Half Wild Goose AJ Phillipss Yo-Ho Mahieus 1/2A Zeek Zigenfuse Pogo Russ Hansens T Bird /2A Sobala Geef Sal Taibis Spacer others Some larger models also included like Ed Howes classic Stare designed 29-35 displacement engines Denny Daviss Ultra Hogan some dated British designs peruse well including Y-Bar Creep Eliminator have thought would great benefit catalog three-views reduced plan drawings published kitted designs could made available serve reference guide well just plain entertainment looks Terry getting us slowly surely third volume NosGas designs Terry advises source issue first two volumes Lee Campbell Campbells Custom Kits price $10 plus $2 postage Book Nostalgia $8 Nostalgia Too $10 course add appropriate postage volumes well Lees address 401 Executive Center Dr Suite H-lOS West Palm Beach FL 33401 Tell em Duration sent British equivalent annual NFFS Symposium Free Flight Forum published BMFA British Model Flying Association 1992 edition available Martin Dilly 20 Links Rd West Wickam Kent BR4 OQW England 830 pounds Payment should check payable BMFA Free Flight Team Travel Fund equivalent pounds sterling drawn PRODUCTS FOR ThE DISCERNING MODELER Complete Line Exhaust Systems d Pipes5 Muffled Tuned Pipes Headers uri Mufflers Expansion Mufflers copter Ball Mufflers ialized Exhaust Systems Unsurpass Model Aviation dy high-density molded plastic 5Cushions impact resists weather 5Strong double hinges durable latch 5Convol foam liner Oreat storing spare transmitters New low price..$l495 Include $350/Item S&HdlaL Residents Add 6% Tax GATOR R/C PRODUCTS INC 3713 Pompano Dr Pensacola FL 32514 Phone 904 494-0203 904 494-0207
Edition: Model Aviation - 1993/05
Page Numbers: 104, 105, 106, 175, 176, 180
T URNIN AND BURNIN Thats what slope racing about tumin hard fast burnin down straights next pylon what consider pinnacle RC soaring models often travel well excess 100 mph during commencement dive start/finish gate Also sleek race models will fly wing tip wing tip averaging better 70 mph duration race addition what other form modeling tasks race models penetrating winds exceed 40 mph carrying five pounds lead wings None simply nothing like Unlimited Slope Racing model aviation Only best soaring pilots participate best come out winners rest just go real fast love minute Now news comes way 1993 slope soaring season promising racers some big-time racing clubs like California Slope Racers new Pro-Am Slope Racers Unlimited clubs hosting major events California Slope Racers promising racers International Slope Races new Pro-Am Slope Racers Unlimited up northwest corner US announcing its total dedication slope racing interested slope racers hosting 1993 Mid-Columbia Cup Slope Races MCCSR MCCSR offering unlimited racers both cash purse chance race under two-man rnles developed 1992 cash purse year $1000 firstplace winner additional cash prizes second third second- third-place awards will depend amount entry receipts new two-man format outlined July 92 MA column affords racers style unlimited racing much less prone midair collisions Pro-Am Slope Racers Unlimited expects new format pit best against best unlimited racing may interested know unlimited racer model carries maximum wing loading 2451 ounces per square foot and/or weighs maximum 11023 pounds new format deviates slightly now-standard four-models-in-a-heat arrangement allow two models racing per heat Additionally rules adopted Pro-Am Slope Racers score races line internationally recognized FAI events Although races still man-on-man MOM scored percentage perfect heat round similar F3F Therefore emphasis speed model able complete racecourse As result pilots challenged compete racers time models enter heat So main difference scoring follows 104 Model Aviation HO CONTROL SLOPE SOARING Conrad excited about flying dad Joseph also happy show oft dads model Dennis Gray demonstrates fine art tossing home-brew wingeron sloper brisk breeze Mike Brown shows off sleek quick V5 Sailplanes Rotor Dean Farnham shows us nicely detailed model conglomeration design ideas likes Hosted Torrey Pines Gulls California Slope Racers May 1-21993 Toney Pines Gliderport La Jolla CaliFornia Seven Rounds Unlimiled Sbpe Racing applicable AMA rules apply Big BBO night fly cliff Saturday night Dnt miss J Percentage-of-perfect heat scores 1 Fastest time awarded 1000 points 2 Second awarded 1st place time/2nd place time x 1000 3 DNF Did Finish awarded 100 points 4 DNS Did Start awarded zero points Percentage-of-perfect round scores 1 Fastest round time awarded 1000 points 2 Other round finishers awarded points fastest round time/respective round time X 1000 example [Fastest round finisher 13 l]I[ 142 r finishers respective time] x 1000 points 3 DNE receives 50 points 4 DNS receives zero points A025 H complete rules published February 1992 issue RIC Soaring Digest can get detailed information rules entry form MCCSR sending SASE Pro-Am Slope Racers Unlimited 606 N White Walla Walla WA 99362 may also give Contest Directors Joe Conrad Roy Lightle call 206 630-2670 509 525-7066 respectively See hope BKwKN NP SE 1/4 PYWDDD DR EDUIVAENT FDR STAND AND 4Th BRACES V025 END VIEV SILL VILE TEE VIEoJ PI -o2S P Left balance stand simple device built -in plywood Below airfoil month Selig 6063 section thin 706% section provides low profile drag May1993 105 ml enirypa&age ormwe dannaiion cci Slew Condon 0 619594-7821 Notice sturdy mounting brackets Cope retract well superb detail hinge points 4 Aviation Software for Modelers Model Pilots Logbook MaIntain record modalng Input dates weather condlilone modeln number Illghta made mid notes SummarIze flyIng acliviilse juat aelected model veralona avalable bout power model mid eanplane pflota Easy use menu dstven QalyJatE Airfoil Designer Oraphicaly display stuidud airfoIl shapes Specify airfoil type thicimees andor chord width model dee~ create tapered wing deelgna dli ferentairfoll shapes stute root mid tIp Graphics can output CAD visa DXF pointers plotters Easy use VGA graphIcal QniyI3LM spoly ilk ate abs Nsch Saud check 4 moesy ardta IDU Software L SL Uncoil, NE mio SIG MANUFACTURING CO now imports complete line world record holding ROSSI aircraft marine helicopter race car engines includes full line parts accessories plus full time ROSSI REPAIR CENTER US SIG-im ported ROSSI engines come full 90 day SIG WARRANTY against work manship manufacturing defects SIG MANUFACTURING CO INC . Montezuma IA 50171 PH 515-623-5154FAX 515-623-3922ToIl Free Orders 800-247-5008 Discovery Park Thanksgiving normally weekend obligation simply means have stop doing model airplane stuff usually occupies much spare time dedicate time family food wine thanksgiving year somewhat different pastand happily Yes still above year took family Seattle Thanksgiving dinner brother-in-law sister-inlaws home food great fun playing kids however six hours TV football bit excessive way thinking Friday following Turkeyday bet wished buzzards fortunately found us slope site just two miles in-laws As know Seattle hilly city also known its rain trees evergreen trees isand grow everywhere Well Discovery Park located just couple miles north downtown Seattle few places haired over trees also area sports nice cliff approximately 200 feet high faces southwest Since wind weather usually blow southwest Discovery Park ideal area slope soarers frequentand first outing Discovery Park back 1976 friend introduced slope soaring moved Seattle 1979 Tn-Cities havent flown site since Well flying sites Discovery Park has become much crowded both model fliers spectators Discovery Park now offers place individuals walk picnic fly kites slope soar generally just have fun Before hear about great models flying site want mention people watching high-powered models zoom overhead kinda frightening since usually fly Eagle Butte attracts mostly fliers spectators because Eagle Butte mostly fliers spectators models usually arent zooming over heads spectators So saw number spectators happily watching models whipped over heads brought about certain feeling concern flying site flying shared sites might wise remind ourselves zooming models have great deal energy stored speed through air Because stored energy could very harmful anyone might hit Think about four-pound model traveling 100 mph damage model could hit someone would certainly affect flying site very well could hurt someone seriously further emphasize much energy stored model lets look results calculation kinetic energy model similar described above formula /2 my2 numbers add up 1344 foot-pounds energy lot isnt Now what would 11-pound slope racer have stored it zooms 120 mph about 5324 foot-pounds So its probably worth being careful courteous always thinking about model respect spectators other fliers After attorneys arent cheap models gracing skies above Discoverys cliff day family visited mostly wingeron ships Sig Samurai VS Sailplanes Rotor home-brew design based leftover VS Sailplane parts another home-brew much like VS Sailplane Chuckar Russian Yak Bob Martin Bob Cat number other models made trek out slope didnt fly wind bit too brisk models either too light conditions modelers confident enough toss sometimes-turbulent air havent seen wingeron wingevator airplane fly quite interesting First lets explain what wingeron plane model simply moves wings effect roll control wingevator glider model has fixed-incidence elevator moves wings effect both pitch roll other words wing incidence decreases effect down elevator rises increase incidence between wing elevator effectively creating up elevator type model known its maneuverability VS Safiplanes designs also noted speed penetra tion day no exception wingeron machines airfoils models using pretty much similar using Eppler 374 modified E-374 now-popular SD-6060 airfoil sections have moderate mean camber line therefore have very modest pitching moment can also penetrate wind need Airfoils like 374 6060 capable performing nice aerobatics pilots skill allows interested wingeron wingevator models suggest contact VS Sailplanes Sig Manufacturing information address VS Sailplanes 723 Broadway East Seattle WA 98102 telephone number 206 860-7711 Sig Manufacturing located Montezuma IA 50171 telephone number 515 623-5154 Cope Retracts now offers what doubt true-to-scale retract available RC scale soaring pilot anywhere world retracts designed built Gene Cope Gene scale RC soaring enthusiast simply could find retractable landing gear accurate enough scale detail satisfy taste Genes answer manufacture own copying design full-scale Kestrel 19 efforts resulted absolutely true scale landing gear accurate detail rugged enough withstand roughest landing 11-pound scale model Cope retract made 4130 steel tubing silver brazed together building jig building gear system jig Gene assures retract will accurate true Thus gear operates smoothly surprisingly little torque Continued page 17S 106 Model Aviation S ON PRO-BOW THIS UNIDUEDEVICEALLOWS YOU TO CUT ACCU RATE WING CORES WITHOUT EXPENSIVE AND COMPLICATED EOUIPMENT WITH THE PRO-BOW THE CUTTING WIRE IS GUIDED DIRECTLY AT THE TEMPLATES BY HAND HELD INSULATOR CLIPS THE HEAVY-DUTY CONSTRUCTION GIVES GOOD FEEL TO THE BOW AND WITH THE ADJUSTABLE HEAT PROBE THE WIRE TEMPERATURE CAN BE CONTROLLED FOR PERFECT CUTTING RESULTS sale $4295 VISA & MASTERCARD ACCEP TEDADD $500 SHIPPING IN USAIL RESIDENTS ADD 7% TAX WING MFG 306 E SIMMONS GALESBURS IL 61401 CALL 309-342-3009 WORKS DIRECTLY OFF OF 12 VOLT BATTERY OR 10 AMP BATTERY ThdGER S COMPLETELY ASSEMBLED STRAIGHT DR TAPERED CORES IAL PASSIVE RESISTANCE CUTTING WIRE LATED STEEL FRAME CUTTING TECHNIDUES & OPERATING INSTRUCTIONS INCLUDED UP TO 41 SEND $500 FOR 60 PAGE CATALOG straight no tendency snap roll drop wing tip 3 slow ground speeds difficult turn model steerable nose wheel individual main gear brakes 4 ABS skin does vibrate excessively regardless engine rpm 5 Theoretically model should fly well 34 pounds hut have yet test theory 6 Elevator trim changes required flaps activated 7 Landings docile 200 400 flaps Forty degrees flap quickly slows plane greatly increases rate descent 8 No control flutter encountered 9 aircraft will spin CG less 20% full control travel CONCLUSIONS project would have successful help encouragement individuals organizations strongly recommend modelers patronize manufacturers distributors mentioned article Further wish thank flight assistantsGus Rebensburg Jerry Reichow Duncan Stewartfor time effort Based test results am now con fident feasible develop full-scale Snipe As am detail-designing big Snipe will continue use -scale model test different features building techniques cant wait get started bending tin summer 1998 Ill let know full-scale aircraft flies leads final question build full-scale model prototype -scale aircraft can enter sanctioned AMA scale contest lope SoaringlByors Continued page 106 required servo fact typical microservo will extend retract landing gear well open landing gear doors Gene has also designed over-center system retractable landing gear landing no force transmitted servo might strip servos gears over-center system also works retracted mode wheels inertia cannot throw gear out open ruggedness retract system surprising Gene has tested gear design doing push-ups install gear builder custom-fits fuselage between two bulkheads installation method serves two purposes First bulkhead mounting provides very rugged attachment inside fuselage gear cannot broken loose landing impact mounting system lets builder adjust depth wheel extension through fuselage Now meticulous scale builder want best retractable gear money can buy Cope retract probably worth considering Gene offers retract two sizes has -scale version currenfly priced $125 Cope also offers supersize -scale retract will handle really big birds tells sometime not-too-distant future will offering -scale model too Cope Retracts can contacted 32031/2 Main St Union Gap WA 98903 telephone number 509 457-9017 modelers friends contacted during month Mr Darrel Johnson Mesa Arizona suggested discuss balance models Well perfectly honest sometimes just mount model atop left right index fingers quick dirty Other times ever procedure bit exacting use balance stand balance stand simple device can built just few minutes aid good old Hot Stuff similar product stand built -inch plywood other plywood approximately size drawing outlines construction shows supporting fillets keep stand breaking large load applied drawing also details round edge stand upon model placed reason use stand quite obvious want obtain balance point model accurately possible stand much easier Using fingers balance model turns procedure somewhat juggling act However can place model stand make weight VIDEO_____ JOY OF FLYING FREE very informative 42 minute VHS video displaying phenomena free flight its variations great PR video can used effectively educate uninitiated art model aviation video professionally produced National Free Flight Society features both indoor outdoor activity available NIFFS 1655 Revere Drive Brookfield WI 53045 * Include Check $2500 plus $300 P&H per tape Buy 4 VgPEOS FREE #17 92 SCALEMASTER CHAMPS STAR MUS PIMA AIR MUS ALABAMA 2 Hrn.$1995 #16 AIRCRAFT GUNTERSYILLE AL AVAL AIR MUS PENSACOLA FL 2 Hn.51996 #1 592 WORLD SCALE CHAMPSAMA INVTL SHOOTOUT W INTL SCALEMASTERS 2 Hn.$1995 #1492 NW SEAPLANE CHAMPS EN SCALE AVIATION IN AUSTRALIA2 Hm.$1995 3 op Gun Invitari oledo Model topo s Air Museum2 Nra. 51996 #12- 91 Scalemasters tao Vegas 91 DSAA Las Vegas 91 NWlntl2 Hre.$1916 C #11 Scalemaster Aircraft Preview Mfg Visdw1tlan Parsons- 91 NWteaplanethamps 2 Kn.S1996 Z#1O 91 Tup Gun W Palm Bch Fl SsA Lao Vegas W Model topu2 Iin.$1996 90 Scalemasters Champs Irving TX hidbey 101 Scalemos5ers an Diego Aerospace Moo 2 Hra.51996 90 NW Intl Scalemasters Farragot Park-Athol ID m Champlin Fighter Museum w/tou Proctor W Seaplane ps Santa Monica Mos Flying 2 Mn. 51995 #7 op Gun Invitational Mesa AZ W Model Eupo2 Hrs.$1995 #6 89 Scalemasters Champs St Louis ake lianaso m Schneider Cop Races2 IIrs.$19gG 89 US NaIls Scale & Seaplanes 89 NW Seaplane Champs Planes Fame taut Moo Moo DshkoshVisit mw/Ralph Beck Chicago Mo Sci & Ind 2 Hs.$1995 #4 09 Top Gon Champo Coral Springs FL tor Albatroo DVA Preview atIs Seaplane Site NW ntl oScalemasters tor N-li Test Flight 2 Hre.S1I96 IA Special Edition Proctor Enterprises Atbatroo OVA Brief Conotr Engine Radio Irrntall& Teat Ftigbto 2 Hra $1996 Cuetias JN4D Jenny Plan FUN SCALE 109 inches 1804 sq 11 lbs 8 sheets w/instroctions 51996 10807 SE STACY CT PORTLAND OR 97266 PHONE 503653-25780 FAX 503 6781342 SEND STAMP FOR COMPLETE LIST PAL & SECAM ORDERS CONCEPTS 17 MILPERA CRESCENT WANTIRNA VIC 3152 AUSTRALIA e 03801-3899 03887-3472 BETA CARLSON ENGINE IMPORTS 814 East Marconi Phoenix AZ 85022-3112 IMPORTED DIESEL ENGINES Worlds Best Selection AE AM Aurora Cipolla D-C KMD MAP Mikro MK MWS Oliver PAW Pfeffer Silver Swallow USE Also Replica Mills MOVO Letmo diesels rare imported glow engines CO motor sets Ten page catalog 1 00 May1993 175 visaBJrn/c ELECTRONICS WE HAVE OVER 26 YEARS EXPERIENCE IN &C AT WE 1466 windward dr mason ohio 45040 ph 513 398-5423 KS METAL Aluminum/Brass/Copper Tubing & Shapes Music Wire 0 Tools Soldering Irons Silk Silk Span Finishing Materials SEND $100 FOR PRICE USIMfI CATALO KS Enginwing 6917 W 59th Street Chicago IL 60638312/5868503 adjustments quite easily Also once balance point suits flying style obtained mark can easily transferred model reference should also pointed out uprights stand three inches wide making wide pounds per square inch exerted balance point bottom wing lowered uprights wide enough small balance points model will sit during balancing process can dent wing Make uprights wide enough reduce pounds per square inch will impart wing obtaining accurate balance point model should consider balancing being performed flying site balance usually accurate unless wind calm case what doing slope inaccuracy occurs because wind pushes model around models nose jumps up down other hand balance calibration shop no air movement can quite accurate type balance provides modeler chance add just right amount weight nose aircraft either teeters balance mark just slightly droops its nose Hope little idea will help get aircraft balanced just right you will discover much pleasurable previously unruly model fly Airfoil month month want share Selig 6063 section section computer generated Michael Selig especially glider fliers have speed running through veins quite thin thickness 706% provides very low profile drag rather telling about would like quote Michael Michaels comments paper sent after 1990 Mid-Columbia Scale Fun-Fly paper titled Three New Airfoils Designed Slope Soaring paper Michael says request several people met past May Tri-Cities Scale Fun Fly have designed three new slope soaring SUNGLASSES 195 100% UV Protection Shatterproof Excellent Optical Quality Tints Fit Over Prescriptions SKYS RO BOX 1000 UMFRIES VA 22026 800-227-9318 airfoils spin-offs 5D6060 common find sariplanes airfoil names like modified E205 E374-9% thinned E374 Certainly slight modifi cation original airfoil will devastate performance modified airfoil will no longer retain favorable characteristics designed original typical modification would scale airfoil y-coordinates some fraction order reduce thickness simple scaling does operate properly airfoil velocity distribution itself derived boundaiy-layer considerations airfoil design process particular airfoil thickness desired requirement best achieved during initial design effort order retain favorable boundary-layer characteristics simultaneously matching thickness specification S6061 9% thick airfoil along lines 104% thick 5D6060 drag predictions made using Drela XFOIL code incompressible version ISES code used aid design SD airfoils presented Soartech #8 Using Princeton airfoil data base found XFOIL code does predict low-Reynolds-number airfoil performance fairly accurately can used compare airfoil designs comparison made constant Reynolds number R0 typically done instead R0 times square root C1 00 Thus Reynolds number varies 1/Square Root C1 C1 decreases R0 increases visa versa can shown such variation R0 follows aircraft flight case Cd plotted corresponds aircraft flight Since constant 125000 aircraft flying C1 ould have R0 00 typical slope soaring aircraft S6061 9% thick section Michael also computer generated compared S6063 7% thick section thinner airfoil produces lower drag Also width low-drag range reduced decreasing thickness Since airfoils intended mainly slope soaring lower limit polar Continued page 180 ZENOAH & OIJ ERCOUPE & J- KITFEN iui ZINGER PROPS CARBON FIBER B&BPRODU DU-BRO GIANT SC 510 ECONITE REIDS 16 MaIn St Phelps NY 145Z 315-548-3779 176 Model Aviation UNE METAL SPECIAUSTS Renogniad Ceflit ledA Aedetset File No____ File Nof Pomer P26226 LR251 64PdOOtS Itto Only certified checks o money orders accepted Minimum otder 614SOfortheepackagesof4 PomerpoleslgdOiperpackage $200 Shipping handlingi CT residents add sales tao Pices suhject change notice DEALER INQUIRIES INVITED furthe information dealer prices send SASE Rosiness Card SERMOS R/C SNAP CONNECTORS Inc Cedar Corners Station Box 16787 Stamford CT 06905 203 322-6294 GATOR TRANSMITEER CASE feather lite GLASS CLOTH 7 az/sq yd weight close weave makes glass cloth easy filling extremely light finished weIght Big 3 sq yd package detailed instructions$895 50FF-N-SAFE MOUNTS new type engine soft mount using special ribbed Iso-damp grommela Engine always safely retained Vesy effective vibration reduction dramatic decrease engine shake Available vely light machined alum beam mount 60 2/strokes 120 4/strokes Also available alum plate radial mount 60 2/strokes Soft-N-SaIe 120 beam mount complete.S2995 5SoftN Safe 60 beam mounl complete..S2495 5SoftNSafe 60 radial mount complete.S129S Replacement grommets 120 mount.A/495 *Replacesnent grommeta 60 mount 4/295 RADIAL ISO-MOUNTS Conventional plate type mount using four Lord/type 60 Duro Iso-mounts Optimized lowest vibration transmission airframe reduced engine shake 60 Radial Iso-mount complete mount..S1495 5Isomotiits Pkg four 995 5/8 dia x 1/2 long 8-32 female end 832 x 1/2 male other end 60 Duro rubber RC Slope SoaringlByers Continued page 176 held fixed near C1 approximately equal 00 upper limit dictated indi rectly airfoil thickness requirements What think Maybe should give S-6063 try some really hot straight line passes Yeah yeah know careful Thanks again reading column Please pass along ideas adventures shared rest slope soaring community urationlMurphy Continued page 108 afford added weight on-off toggle switch DT-fuse-actuated microswitch keep power off until model DTed added weight easily compensated removing weight elsewhere model such lighter wheels lighter batteries lighter coil other such belttightening steps Since SAM-legal model must weigh mimmum 263 ounces anyway added weight provided littleif anyhandicap model performance Remember what said beginning Systems selection will also depend intended application Some may question DT-actuated devices mere battery savers sacrificing use flyaway situations DT fails function suppose could argue 10 miles off course well out sight model couldnt hear device operating worst out cost model plus small amount have invested system Conversely 10 miles off course out sight model carrying $125 electronic transmitters chances going get back via model-finder system either Thus out additional $125 rather 10 spot Well much what-if scenarios about enough verbiage model finders session will cut off until review another system two next F send *100 illustratsd catalogue 0warbirds 39 inch span 70pawered slope gliders sliders 1930s Telephone 714 77541530sailboats trio macas PO BOX 1249 MINSTER CA 92684-1249 time Remember columnist welcomes information effective system available modelerswhether commercial cottage industry brainstorm sourcesthat would justify review series reports Keep cards letters coming folks thank ye kindly New publications catalogs Terry Rimerts Fly-By-Night Press has issued its third plan book Nostalgia Gas designs aptly named Third Nostalgia book contains reduced-size plans designs era accent 1/2A designs such Kiwi Frank Garcher s Midwest Fortastrop Samuelson s Half Wild Goose AJ Phillipss Yo-Ho Mahieus 1/2A Zeek Zigenfuse Pogo Russ Hansens T Bird /2A Sobala Geef Sal Taibis Spacer others Some larger models also included like Ed Howes classic Stare designed 29-35 displacement engines Denny Daviss Ultra Hogan some dated British designs peruse well including Y-Bar Creep Eliminator have thought would great benefit catalog three-views reduced plan drawings published kitted designs could made available serve reference guide well just plain entertainment looks Terry getting us slowly surely third volume NosGas designs Terry advises source issue first two volumes Lee Campbell Campbells Custom Kits price $10 plus $2 postage Book Nostalgia $8 Nostalgia Too $10 course add appropriate postage volumes well Lees address 401 Executive Center Dr Suite H-lOS West Palm Beach FL 33401 Tell em Duration sent British equivalent annual NFFS Symposium Free Flight Forum published BMFA British Model Flying Association 1992 edition available Martin Dilly 20 Links Rd West Wickam Kent BR4 OQW England 830 pounds Payment should check payable BMFA Free Flight Team Travel Fund equivalent pounds sterling drawn PRODUCTS FOR ThE DISCERNING MODELER Complete Line Exhaust Systems d Pipes5 Muffled Tuned Pipes Headers uri Mufflers Expansion Mufflers copter Ball Mufflers ialized Exhaust Systems Unsurpass Model Aviation dy high-density molded plastic 5Cushions impact resists weather 5Strong double hinges durable latch 5Convol foam liner Oreat storing spare transmitters New low price..$l495 Include $350/Item S&HdlaL Residents Add 6% Tax GATOR R/C PRODUCTS INC 3713 Pompano Dr Pensacola FL 32514 Phone 904 494-0203 904 494-0207
Edition: Model Aviation - 1993/05
Page Numbers: 104, 105, 106, 175, 176, 180
T URNIN AND BURNIN Thats what slope racing about tumin hard fast burnin down straights next pylon what consider pinnacle RC soaring models often travel well excess 100 mph during commencement dive start/finish gate Also sleek race models will fly wing tip wing tip averaging better 70 mph duration race addition what other form modeling tasks race models penetrating winds exceed 40 mph carrying five pounds lead wings None simply nothing like Unlimited Slope Racing model aviation Only best soaring pilots participate best come out winners rest just go real fast love minute Now news comes way 1993 slope soaring season promising racers some big-time racing clubs like California Slope Racers new Pro-Am Slope Racers Unlimited clubs hosting major events California Slope Racers promising racers International Slope Races new Pro-Am Slope Racers Unlimited up northwest corner US announcing its total dedication slope racing interested slope racers hosting 1993 Mid-Columbia Cup Slope Races MCCSR MCCSR offering unlimited racers both cash purse chance race under two-man rnles developed 1992 cash purse year $1000 firstplace winner additional cash prizes second third second- third-place awards will depend amount entry receipts new two-man format outlined July 92 MA column affords racers style unlimited racing much less prone midair collisions Pro-Am Slope Racers Unlimited expects new format pit best against best unlimited racing may interested know unlimited racer model carries maximum wing loading 2451 ounces per square foot and/or weighs maximum 11023 pounds new format deviates slightly now-standard four-models-in-a-heat arrangement allow two models racing per heat Additionally rules adopted Pro-Am Slope Racers score races line internationally recognized FAI events Although races still man-on-man MOM scored percentage perfect heat round similar F3F Therefore emphasis speed model able complete racecourse As result pilots challenged compete racers time models enter heat So main difference scoring follows 104 Model Aviation HO CONTROL SLOPE SOARING Conrad excited about flying dad Joseph also happy show oft dads model Dennis Gray demonstrates fine art tossing home-brew wingeron sloper brisk breeze Mike Brown shows off sleek quick V5 Sailplanes Rotor Dean Farnham shows us nicely detailed model conglomeration design ideas likes Hosted Torrey Pines Gulls California Slope Racers May 1-21993 Toney Pines Gliderport La Jolla CaliFornia Seven Rounds Unlimiled Sbpe Racing applicable AMA rules apply Big BBO night fly cliff Saturday night Dnt miss J Percentage-of-perfect heat scores 1 Fastest time awarded 1000 points 2 Second awarded 1st place time/2nd place time x 1000 3 DNF Did Finish awarded 100 points 4 DNS Did Start awarded zero points Percentage-of-perfect round scores 1 Fastest round time awarded 1000 points 2 Other round finishers awarded points fastest round time/respective round time X 1000 example [Fastest round finisher 13 l]I[ 142 r finishers respective time] x 1000 points 3 DNE receives 50 points 4 DNS receives zero points A025 H complete rules published February 1992 issue RIC Soaring Digest can get detailed information rules entry form MCCSR sending SASE Pro-Am Slope Racers Unlimited 606 N White Walla Walla WA 99362 may also give Contest Directors Joe Conrad Roy Lightle call 206 630-2670 509 525-7066 respectively See hope BKwKN NP SE 1/4 PYWDDD DR EDUIVAENT FDR STAND AND 4Th BRACES V025 END VIEV SILL VILE TEE VIEoJ PI -o2S P Left balance stand simple device built -in plywood Below airfoil month Selig 6063 section thin 706% section provides low profile drag May1993 105 ml enirypa&age ormwe dannaiion cci Slew Condon 0 619594-7821 Notice sturdy mounting brackets Cope retract well superb detail hinge points 4 Aviation Software for Modelers Model Pilots Logbook MaIntain record modalng Input dates weather condlilone modeln number Illghta made mid notes SummarIze flyIng acliviilse juat aelected model veralona avalable bout power model mid eanplane pflota Easy use menu dstven QalyJatE Airfoil Designer Oraphicaly display stuidud airfoIl shapes Specify airfoil type thicimees andor chord width model dee~ create tapered wing deelgna dli ferentairfoll shapes stute root mid tIp Graphics can output CAD visa DXF pointers plotters Easy use VGA graphIcal QniyI3LM spoly ilk ate abs Nsch Saud check 4 moesy ardta IDU Software L SL Uncoil, NE mio SIG MANUFACTURING CO now imports complete line world record holding ROSSI aircraft marine helicopter race car engines includes full line parts accessories plus full time ROSSI REPAIR CENTER US SIG-im ported ROSSI engines come full 90 day SIG WARRANTY against work manship manufacturing defects SIG MANUFACTURING CO INC . Montezuma IA 50171 PH 515-623-5154FAX 515-623-3922ToIl Free Orders 800-247-5008 Discovery Park Thanksgiving normally weekend obligation simply means have stop doing model airplane stuff usually occupies much spare time dedicate time family food wine thanksgiving year somewhat different pastand happily Yes still above year took family Seattle Thanksgiving dinner brother-in-law sister-inlaws home food great fun playing kids however six hours TV football bit excessive way thinking Friday following Turkeyday bet wished buzzards fortunately found us slope site just two miles in-laws As know Seattle hilly city also known its rain trees evergreen trees isand grow everywhere Well Discovery Park located just couple miles north downtown Seattle few places haired over trees also area sports nice cliff approximately 200 feet high faces southwest Since wind weather usually blow southwest Discovery Park ideal area slope soarers frequentand first outing Discovery Park back 1976 friend introduced slope soaring moved Seattle 1979 Tn-Cities havent flown site since Well flying sites Discovery Park has become much crowded both model fliers spectators Discovery Park now offers place individuals walk picnic fly kites slope soar generally just have fun Before hear about great models flying site want mention people watching high-powered models zoom overhead kinda frightening since usually fly Eagle Butte attracts mostly fliers spectators because Eagle Butte mostly fliers spectators models usually arent zooming over heads spectators So saw number spectators happily watching models whipped over heads brought about certain feeling concern flying site flying shared sites might wise remind ourselves zooming models have great deal energy stored speed through air Because stored energy could very harmful anyone might hit Think about four-pound model traveling 100 mph damage model could hit someone would certainly affect flying site very well could hurt someone seriously further emphasize much energy stored model lets look results calculation kinetic energy model similar described above formula /2 my2 numbers add up 1344 foot-pounds energy lot isnt Now what would 11-pound slope racer have stored it zooms 120 mph about 5324 foot-pounds So its probably worth being careful courteous always thinking about model respect spectators other fliers After attorneys arent cheap models gracing skies above Discoverys cliff day family visited mostly wingeron ships Sig Samurai VS Sailplanes Rotor home-brew design based leftover VS Sailplane parts another home-brew much like VS Sailplane Chuckar Russian Yak Bob Martin Bob Cat number other models made trek out slope didnt fly wind bit too brisk models either too light conditions modelers confident enough toss sometimes-turbulent air havent seen wingeron wingevator airplane fly quite interesting First lets explain what wingeron plane model simply moves wings effect roll control wingevator glider model has fixed-incidence elevator moves wings effect both pitch roll other words wing incidence decreases effect down elevator rises increase incidence between wing elevator effectively creating up elevator type model known its maneuverability VS Safiplanes designs also noted speed penetra tion day no exception wingeron machines airfoils models using pretty much similar using Eppler 374 modified E-374 now-popular SD-6060 airfoil sections have moderate mean camber line therefore have very modest pitching moment can also penetrate wind need Airfoils like 374 6060 capable performing nice aerobatics pilots skill allows interested wingeron wingevator models suggest contact VS Sailplanes Sig Manufacturing information address VS Sailplanes 723 Broadway East Seattle WA 98102 telephone number 206 860-7711 Sig Manufacturing located Montezuma IA 50171 telephone number 515 623-5154 Cope Retracts now offers what doubt true-to-scale retract available RC scale soaring pilot anywhere world retracts designed built Gene Cope Gene scale RC soaring enthusiast simply could find retractable landing gear accurate enough scale detail satisfy taste Genes answer manufacture own copying design full-scale Kestrel 19 efforts resulted absolutely true scale landing gear accurate detail rugged enough withstand roughest landing 11-pound scale model Cope retract made 4130 steel tubing silver brazed together building jig building gear system jig Gene assures retract will accurate true Thus gear operates smoothly surprisingly little torque Continued page 17S 106 Model Aviation S ON PRO-BOW THIS UNIDUEDEVICEALLOWS YOU TO CUT ACCU RATE WING CORES WITHOUT EXPENSIVE AND COMPLICATED EOUIPMENT WITH THE PRO-BOW THE CUTTING WIRE IS GUIDED DIRECTLY AT THE TEMPLATES BY HAND HELD INSULATOR CLIPS THE HEAVY-DUTY CONSTRUCTION GIVES GOOD FEEL TO THE BOW AND WITH THE ADJUSTABLE HEAT PROBE THE WIRE TEMPERATURE CAN BE CONTROLLED FOR PERFECT CUTTING RESULTS sale $4295 VISA & MASTERCARD ACCEP TEDADD $500 SHIPPING IN USAIL RESIDENTS ADD 7% TAX WING MFG 306 E SIMMONS GALESBURS IL 61401 CALL 309-342-3009 WORKS DIRECTLY OFF OF 12 VOLT BATTERY OR 10 AMP BATTERY ThdGER S COMPLETELY ASSEMBLED STRAIGHT DR TAPERED CORES IAL PASSIVE RESISTANCE CUTTING WIRE LATED STEEL FRAME CUTTING TECHNIDUES & OPERATING INSTRUCTIONS INCLUDED UP TO 41 SEND $500 FOR 60 PAGE CATALOG straight no tendency snap roll drop wing tip 3 slow ground speeds difficult turn model steerable nose wheel individual main gear brakes 4 ABS skin does vibrate excessively regardless engine rpm 5 Theoretically model should fly well 34 pounds hut have yet test theory 6 Elevator trim changes required flaps activated 7 Landings docile 200 400 flaps Forty degrees flap quickly slows plane greatly increases rate descent 8 No control flutter encountered 9 aircraft will spin CG less 20% full control travel CONCLUSIONS project would have successful help encouragement individuals organizations strongly recommend modelers patronize manufacturers distributors mentioned article Further wish thank flight assistantsGus Rebensburg Jerry Reichow Duncan Stewartfor time effort Based test results am now con fident feasible develop full-scale Snipe As am detail-designing big Snipe will continue use -scale model test different features building techniques cant wait get started bending tin summer 1998 Ill let know full-scale aircraft flies leads final question build full-scale model prototype -scale aircraft can enter sanctioned AMA scale contest lope SoaringlByors Continued page 106 required servo fact typical microservo will extend retract landing gear well open landing gear doors Gene has also designed over-center system retractable landing gear landing no force transmitted servo might strip servos gears over-center system also works retracted mode wheels inertia cannot throw gear out open ruggedness retract system surprising Gene has tested gear design doing push-ups install gear builder custom-fits fuselage between two bulkheads installation method serves two purposes First bulkhead mounting provides very rugged attachment inside fuselage gear cannot broken loose landing impact mounting system lets builder adjust depth wheel extension through fuselage Now meticulous scale builder want best retractable gear money can buy Cope retract probably worth considering Gene offers retract two sizes has -scale version currenfly priced $125 Cope also offers supersize -scale retract will handle really big birds tells sometime not-too-distant future will offering -scale model too Cope Retracts can contacted 32031/2 Main St Union Gap WA 98903 telephone number 509 457-9017 modelers friends contacted during month Mr Darrel Johnson Mesa Arizona suggested discuss balance models Well perfectly honest sometimes just mount model atop left right index fingers quick dirty Other times ever procedure bit exacting use balance stand balance stand simple device can built just few minutes aid good old Hot Stuff similar product stand built -inch plywood other plywood approximately size drawing outlines construction shows supporting fillets keep stand breaking large load applied drawing also details round edge stand upon model placed reason use stand quite obvious want obtain balance point model accurately possible stand much easier Using fingers balance model turns procedure somewhat juggling act However can place model stand make weight VIDEO_____ JOY OF FLYING FREE very informative 42 minute VHS video displaying phenomena free flight its variations great PR video can used effectively educate uninitiated art model aviation video professionally produced National Free Flight Society features both indoor outdoor activity available NIFFS 1655 Revere Drive Brookfield WI 53045 * Include Check $2500 plus $300 P&H per tape Buy 4 VgPEOS FREE #17 92 SCALEMASTER CHAMPS STAR MUS PIMA AIR MUS ALABAMA 2 Hrn.$1995 #16 AIRCRAFT GUNTERSYILLE AL AVAL AIR MUS PENSACOLA FL 2 Hn.51996 #1 592 WORLD SCALE CHAMPSAMA INVTL SHOOTOUT W INTL SCALEMASTERS 2 Hn.$1995 #1492 NW SEAPLANE CHAMPS EN SCALE AVIATION IN AUSTRALIA2 Hm.$1995 3 op Gun Invitari oledo Model topo s Air Museum2 Nra. 51996 #12- 91 Scalemasters tao Vegas 91 DSAA Las Vegas 91 NWlntl2 Hre.$1916 C #11 Scalemaster Aircraft Preview Mfg Visdw1tlan Parsons- 91 NWteaplanethamps 2 Kn.S1996 Z#1O 91 Tup Gun W Palm Bch Fl SsA Lao Vegas W Model topu2 Iin.$1996 90 Scalemasters Champs Irving TX hidbey 101 Scalemos5ers an Diego Aerospace Moo 2 Hra.51996 90 NW Intl Scalemasters Farragot Park-Athol ID m Champlin Fighter Museum w/tou Proctor W Seaplane ps Santa Monica Mos Flying 2 Mn. 51995 #7 op Gun Invitational Mesa AZ W Model Eupo2 Hrs.$1995 #6 89 Scalemasters Champs St Louis ake lianaso m Schneider Cop Races2 IIrs.$19gG 89 US NaIls Scale & Seaplanes 89 NW Seaplane Champs Planes Fame taut Moo Moo DshkoshVisit mw/Ralph Beck Chicago Mo Sci & Ind 2 Hs.$1995 #4 09 Top Gon Champo Coral Springs FL tor Albatroo DVA Preview atIs Seaplane Site NW ntl oScalemasters tor N-li Test Flight 2 Hre.S1I96 IA Special Edition Proctor Enterprises Atbatroo OVA Brief Conotr Engine Radio Irrntall& Teat Ftigbto 2 Hra $1996 Cuetias JN4D Jenny Plan FUN SCALE 109 inches 1804 sq 11 lbs 8 sheets w/instroctions 51996 10807 SE STACY CT PORTLAND OR 97266 PHONE 503653-25780 FAX 503 6781342 SEND STAMP FOR COMPLETE LIST PAL & SECAM ORDERS CONCEPTS 17 MILPERA CRESCENT WANTIRNA VIC 3152 AUSTRALIA e 03801-3899 03887-3472 BETA CARLSON ENGINE IMPORTS 814 East Marconi Phoenix AZ 85022-3112 IMPORTED DIESEL ENGINES Worlds Best Selection AE AM Aurora Cipolla D-C KMD MAP Mikro MK MWS Oliver PAW Pfeffer Silver Swallow USE Also Replica Mills MOVO Letmo diesels rare imported glow engines CO motor sets Ten page catalog 1 00 May1993 175 visaBJrn/c ELECTRONICS WE HAVE OVER 26 YEARS EXPERIENCE IN &C AT WE 1466 windward dr mason ohio 45040 ph 513 398-5423 KS METAL Aluminum/Brass/Copper Tubing & Shapes Music Wire 0 Tools Soldering Irons Silk Silk Span Finishing Materials SEND $100 FOR PRICE USIMfI CATALO KS Enginwing 6917 W 59th Street Chicago IL 60638312/5868503 adjustments quite easily Also once balance point suits flying style obtained mark can easily transferred model reference should also pointed out uprights stand three inches wide making wide pounds per square inch exerted balance point bottom wing lowered uprights wide enough small balance points model will sit during balancing process can dent wing Make uprights wide enough reduce pounds per square inch will impart wing obtaining accurate balance point model should consider balancing being performed flying site balance usually accurate unless wind calm case what doing slope inaccuracy occurs because wind pushes model around models nose jumps up down other hand balance calibration shop no air movement can quite accurate type balance provides modeler chance add just right amount weight nose aircraft either teeters balance mark just slightly droops its nose Hope little idea will help get aircraft balanced just right you will discover much pleasurable previously unruly model fly Airfoil month month want share Selig 6063 section section computer generated Michael Selig especially glider fliers have speed running through veins quite thin thickness 706% provides very low profile drag rather telling about would like quote Michael Michaels comments paper sent after 1990 Mid-Columbia Scale Fun-Fly paper titled Three New Airfoils Designed Slope Soaring paper Michael says request several people met past May Tri-Cities Scale Fun Fly have designed three new slope soaring SUNGLASSES 195 100% UV Protection Shatterproof Excellent Optical Quality Tints Fit Over Prescriptions SKYS RO BOX 1000 UMFRIES VA 22026 800-227-9318 airfoils spin-offs 5D6060 common find sariplanes airfoil names like modified E205 E374-9% thinned E374 Certainly slight modifi cation original airfoil will devastate performance modified airfoil will no longer retain favorable characteristics designed original typical modification would scale airfoil y-coordinates some fraction order reduce thickness simple scaling does operate properly airfoil velocity distribution itself derived boundaiy-layer considerations airfoil design process particular airfoil thickness desired requirement best achieved during initial design effort order retain favorable boundary-layer characteristics simultaneously matching thickness specification S6061 9% thick airfoil along lines 104% thick 5D6060 drag predictions made using Drela XFOIL code incompressible version ISES code used aid design SD airfoils presented Soartech #8 Using Princeton airfoil data base found XFOIL code does predict low-Reynolds-number airfoil performance fairly accurately can used compare airfoil designs comparison made constant Reynolds number R0 typically done instead R0 times square root C1 00 Thus Reynolds number varies 1/Square Root C1 C1 decreases R0 increases visa versa can shown such variation R0 follows aircraft flight case Cd plotted corresponds aircraft flight Since constant 125000 aircraft flying C1 ould have R0 00 typical slope soaring aircraft S6061 9% thick section Michael also computer generated compared S6063 7% thick section thinner airfoil produces lower drag Also width low-drag range reduced decreasing thickness Since airfoils intended mainly slope soaring lower limit polar Continued page 180 ZENOAH & OIJ ERCOUPE & J- KITFEN iui ZINGER PROPS CARBON FIBER B&BPRODU DU-BRO GIANT SC 510 ECONITE REIDS 16 MaIn St Phelps NY 145Z 315-548-3779 176 Model Aviation UNE METAL SPECIAUSTS Renogniad Ceflit ledA Aedetset File No____ File Nof Pomer P26226 LR251 64PdOOtS Itto Only certified checks o money orders accepted Minimum otder 614SOfortheepackagesof4 PomerpoleslgdOiperpackage $200 Shipping handlingi CT residents add sales tao Pices suhject change notice DEALER INQUIRIES INVITED furthe information dealer prices send SASE Rosiness Card SERMOS R/C SNAP CONNECTORS Inc Cedar Corners Station Box 16787 Stamford CT 06905 203 322-6294 GATOR TRANSMITEER CASE feather lite GLASS CLOTH 7 az/sq yd weight close weave makes glass cloth easy filling extremely light finished weIght Big 3 sq yd package detailed instructions$895 50FF-N-SAFE MOUNTS new type engine soft mount using special ribbed Iso-damp grommela Engine always safely retained Vesy effective vibration reduction dramatic decrease engine shake Available vely light machined alum beam mount 60 2/strokes 120 4/strokes Also available alum plate radial mount 60 2/strokes Soft-N-SaIe 120 beam mount complete.S2995 5SoftN Safe 60 beam mounl complete..S2495 5SoftNSafe 60 radial mount complete.S129S Replacement grommets 120 mount.A/495 *Replacesnent grommeta 60 mount 4/295 RADIAL ISO-MOUNTS Conventional plate type mount using four Lord/type 60 Duro Iso-mounts Optimized lowest vibration transmission airframe reduced engine shake 60 Radial Iso-mount complete mount..S1495 5Isomotiits Pkg four 995 5/8 dia x 1/2 long 8-32 female end 832 x 1/2 male other end 60 Duro rubber RC Slope SoaringlByers Continued page 176 held fixed near C1 approximately equal 00 upper limit dictated indi rectly airfoil thickness requirements What think Maybe should give S-6063 try some really hot straight line passes Yeah yeah know careful Thanks again reading column Please pass along ideas adventures shared rest slope soaring community urationlMurphy Continued page 108 afford added weight on-off toggle switch DT-fuse-actuated microswitch keep power off until model DTed added weight easily compensated removing weight elsewhere model such lighter wheels lighter batteries lighter coil other such belttightening steps Since SAM-legal model must weigh mimmum 263 ounces anyway added weight provided littleif anyhandicap model performance Remember what said beginning Systems selection will also depend intended application Some may question DT-actuated devices mere battery savers sacrificing use flyaway situations DT fails function suppose could argue 10 miles off course well out sight model couldnt hear device operating worst out cost model plus small amount have invested system Conversely 10 miles off course out sight model carrying $125 electronic transmitters chances going get back via model-finder system either Thus out additional $125 rather 10 spot Well much what-if scenarios about enough verbiage model finders session will cut off until review another system two next F send *100 illustratsd catalogue 0warbirds 39 inch span 70pawered slope gliders sliders 1930s Telephone 714 77541530sailboats trio macas PO BOX 1249 MINSTER CA 92684-1249 time Remember columnist welcomes information effective system available modelerswhether commercial cottage industry brainstorm sourcesthat would justify review series reports Keep cards letters coming folks thank ye kindly New publications catalogs Terry Rimerts Fly-By-Night Press has issued its third plan book Nostalgia Gas designs aptly named Third Nostalgia book contains reduced-size plans designs era accent 1/2A designs such Kiwi Frank Garcher s Midwest Fortastrop Samuelson s Half Wild Goose AJ Phillipss Yo-Ho Mahieus 1/2A Zeek Zigenfuse Pogo Russ Hansens T Bird /2A Sobala Geef Sal Taibis Spacer others Some larger models also included like Ed Howes classic Stare designed 29-35 displacement engines Denny Daviss Ultra Hogan some dated British designs peruse well including Y-Bar Creep Eliminator have thought would great benefit catalog three-views reduced plan drawings published kitted designs could made available serve reference guide well just plain entertainment looks Terry getting us slowly surely third volume NosGas designs Terry advises source issue first two volumes Lee Campbell Campbells Custom Kits price $10 plus $2 postage Book Nostalgia $8 Nostalgia Too $10 course add appropriate postage volumes well Lees address 401 Executive Center Dr Suite H-lOS West Palm Beach FL 33401 Tell em Duration sent British equivalent annual NFFS Symposium Free Flight Forum published BMFA British Model Flying Association 1992 edition available Martin Dilly 20 Links Rd West Wickam Kent BR4 OQW England 830 pounds Payment should check payable BMFA Free Flight Team Travel Fund equivalent pounds sterling drawn PRODUCTS FOR ThE DISCERNING MODELER Complete Line Exhaust Systems d Pipes5 Muffled Tuned Pipes Headers uri Mufflers Expansion Mufflers copter Ball Mufflers ialized Exhaust Systems Unsurpass Model Aviation dy high-density molded plastic 5Cushions impact resists weather 5Strong double hinges durable latch 5Convol foam liner Oreat storing spare transmitters New low price..$l495 Include $350/Item S&HdlaL Residents Add 6% Tax GATOR R/C PRODUCTS INC 3713 Pompano Dr Pensacola FL 32514 Phone 904 494-0203 904 494-0207
Edition: Model Aviation - 1993/05
Page Numbers: 104, 105, 106, 175, 176, 180
T URNIN AND BURNIN Thats what slope racing about tumin hard fast burnin down straights next pylon what consider pinnacle RC soaring models often travel well excess 100 mph during commencement dive start/finish gate Also sleek race models will fly wing tip wing tip averaging better 70 mph duration race addition what other form modeling tasks race models penetrating winds exceed 40 mph carrying five pounds lead wings None simply nothing like Unlimited Slope Racing model aviation Only best soaring pilots participate best come out winners rest just go real fast love minute Now news comes way 1993 slope soaring season promising racers some big-time racing clubs like California Slope Racers new Pro-Am Slope Racers Unlimited clubs hosting major events California Slope Racers promising racers International Slope Races new Pro-Am Slope Racers Unlimited up northwest corner US announcing its total dedication slope racing interested slope racers hosting 1993 Mid-Columbia Cup Slope Races MCCSR MCCSR offering unlimited racers both cash purse chance race under two-man rnles developed 1992 cash purse year $1000 firstplace winner additional cash prizes second third second- third-place awards will depend amount entry receipts new two-man format outlined July 92 MA column affords racers style unlimited racing much less prone midair collisions Pro-Am Slope Racers Unlimited expects new format pit best against best unlimited racing may interested know unlimited racer model carries maximum wing loading 2451 ounces per square foot and/or weighs maximum 11023 pounds new format deviates slightly now-standard four-models-in-a-heat arrangement allow two models racing per heat Additionally rules adopted Pro-Am Slope Racers score races line internationally recognized FAI events Although races still man-on-man MOM scored percentage perfect heat round similar F3F Therefore emphasis speed model able complete racecourse As result pilots challenged compete racers time models enter heat So main difference scoring follows 104 Model Aviation HO CONTROL SLOPE SOARING Conrad excited about flying dad Joseph also happy show oft dads model Dennis Gray demonstrates fine art tossing home-brew wingeron sloper brisk breeze Mike Brown shows off sleek quick V5 Sailplanes Rotor Dean Farnham shows us nicely detailed model conglomeration design ideas likes Hosted Torrey Pines Gulls California Slope Racers May 1-21993 Toney Pines Gliderport La Jolla CaliFornia Seven Rounds Unlimiled Sbpe Racing applicable AMA rules apply Big BBO night fly cliff Saturday night Dnt miss J Percentage-of-perfect heat scores 1 Fastest time awarded 1000 points 2 Second awarded 1st place time/2nd place time x 1000 3 DNF Did Finish awarded 100 points 4 DNS Did Start awarded zero points Percentage-of-perfect round scores 1 Fastest round time awarded 1000 points 2 Other round finishers awarded points fastest round time/respective round time X 1000 example [Fastest round finisher 13 l]I[ 142 r finishers respective time] x 1000 points 3 DNE receives 50 points 4 DNS receives zero points A025 H complete rules published February 1992 issue RIC Soaring Digest can get detailed information rules entry form MCCSR sending SASE Pro-Am Slope Racers Unlimited 606 N White Walla Walla WA 99362 may also give Contest Directors Joe Conrad Roy Lightle call 206 630-2670 509 525-7066 respectively See hope BKwKN NP SE 1/4 PYWDDD DR EDUIVAENT FDR STAND AND 4Th BRACES V025 END VIEV SILL VILE TEE VIEoJ PI -o2S P Left balance stand simple device built -in plywood Below airfoil month Selig 6063 section thin 706% section provides low profile drag May1993 105 ml enirypa&age ormwe dannaiion cci Slew Condon 0 619594-7821 Notice sturdy mounting brackets Cope retract well superb detail hinge points 4 Aviation Software for Modelers Model Pilots Logbook MaIntain record modalng Input dates weather condlilone modeln number Illghta made mid notes SummarIze flyIng acliviilse juat aelected model veralona avalable bout power model mid eanplane pflota Easy use menu dstven QalyJatE Airfoil Designer Oraphicaly display stuidud airfoIl shapes Specify airfoil type thicimees andor chord width model dee~ create tapered wing deelgna dli ferentairfoll shapes stute root mid tIp Graphics can output CAD visa DXF pointers plotters Easy use VGA graphIcal QniyI3LM spoly ilk ate abs Nsch Saud check 4 moesy ardta IDU Software L SL Uncoil, NE mio SIG MANUFACTURING CO now imports complete line world record holding ROSSI aircraft marine helicopter race car engines includes full line parts accessories plus full time ROSSI REPAIR CENTER US SIG-im ported ROSSI engines come full 90 day SIG WARRANTY against work manship manufacturing defects SIG MANUFACTURING CO INC . Montezuma IA 50171 PH 515-623-5154FAX 515-623-3922ToIl Free Orders 800-247-5008 Discovery Park Thanksgiving normally weekend obligation simply means have stop doing model airplane stuff usually occupies much spare time dedicate time family food wine thanksgiving year somewhat different pastand happily Yes still above year took family Seattle Thanksgiving dinner brother-in-law sister-inlaws home food great fun playing kids however six hours TV football bit excessive way thinking Friday following Turkeyday bet wished buzzards fortunately found us slope site just two miles in-laws As know Seattle hilly city also known its rain trees evergreen trees isand grow everywhere Well Discovery Park located just couple miles north downtown Seattle few places haired over trees also area sports nice cliff approximately 200 feet high faces southwest Since wind weather usually blow southwest Discovery Park ideal area slope soarers frequentand first outing Discovery Park back 1976 friend introduced slope soaring moved Seattle 1979 Tn-Cities havent flown site since Well flying sites Discovery Park has become much crowded both model fliers spectators Discovery Park now offers place individuals walk picnic fly kites slope soar generally just have fun Before hear about great models flying site want mention people watching high-powered models zoom overhead kinda frightening since usually fly Eagle Butte attracts mostly fliers spectators because Eagle Butte mostly fliers spectators models usually arent zooming over heads spectators So saw number spectators happily watching models whipped over heads brought about certain feeling concern flying site flying shared sites might wise remind ourselves zooming models have great deal energy stored speed through air Because stored energy could very harmful anyone might hit Think about four-pound model traveling 100 mph damage model could hit someone would certainly affect flying site very well could hurt someone seriously further emphasize much energy stored model lets look results calculation kinetic energy model similar described above formula /2 my2 numbers add up 1344 foot-pounds energy lot isnt Now what would 11-pound slope racer have stored it zooms 120 mph about 5324 foot-pounds So its probably worth being careful courteous always thinking about model respect spectators other fliers After attorneys arent cheap models gracing skies above Discoverys cliff day family visited mostly wingeron ships Sig Samurai VS Sailplanes Rotor home-brew design based leftover VS Sailplane parts another home-brew much like VS Sailplane Chuckar Russian Yak Bob Martin Bob Cat number other models made trek out slope didnt fly wind bit too brisk models either too light conditions modelers confident enough toss sometimes-turbulent air havent seen wingeron wingevator airplane fly quite interesting First lets explain what wingeron plane model simply moves wings effect roll control wingevator glider model has fixed-incidence elevator moves wings effect both pitch roll other words wing incidence decreases effect down elevator rises increase incidence between wing elevator effectively creating up elevator type model known its maneuverability VS Safiplanes designs also noted speed penetra tion day no exception wingeron machines airfoils models using pretty much similar using Eppler 374 modified E-374 now-popular SD-6060 airfoil sections have moderate mean camber line therefore have very modest pitching moment can also penetrate wind need Airfoils like 374 6060 capable performing nice aerobatics pilots skill allows interested wingeron wingevator models suggest contact VS Sailplanes Sig Manufacturing information address VS Sailplanes 723 Broadway East Seattle WA 98102 telephone number 206 860-7711 Sig Manufacturing located Montezuma IA 50171 telephone number 515 623-5154 Cope Retracts now offers what doubt true-to-scale retract available RC scale soaring pilot anywhere world retracts designed built Gene Cope Gene scale RC soaring enthusiast simply could find retractable landing gear accurate enough scale detail satisfy taste Genes answer manufacture own copying design full-scale Kestrel 19 efforts resulted absolutely true scale landing gear accurate detail rugged enough withstand roughest landing 11-pound scale model Cope retract made 4130 steel tubing silver brazed together building jig building gear system jig Gene assures retract will accurate true Thus gear operates smoothly surprisingly little torque Continued page 17S 106 Model Aviation S ON PRO-BOW THIS UNIDUEDEVICEALLOWS YOU TO CUT ACCU RATE WING CORES WITHOUT EXPENSIVE AND COMPLICATED EOUIPMENT WITH THE PRO-BOW THE CUTTING WIRE IS GUIDED DIRECTLY AT THE TEMPLATES BY HAND HELD INSULATOR CLIPS THE HEAVY-DUTY CONSTRUCTION GIVES GOOD FEEL TO THE BOW AND WITH THE ADJUSTABLE HEAT PROBE THE WIRE TEMPERATURE CAN BE CONTROLLED FOR PERFECT CUTTING RESULTS sale $4295 VISA & MASTERCARD ACCEP TEDADD $500 SHIPPING IN USAIL RESIDENTS ADD 7% TAX WING MFG 306 E SIMMONS GALESBURS IL 61401 CALL 309-342-3009 WORKS DIRECTLY OFF OF 12 VOLT BATTERY OR 10 AMP BATTERY ThdGER S COMPLETELY ASSEMBLED STRAIGHT DR TAPERED CORES IAL PASSIVE RESISTANCE CUTTING WIRE LATED STEEL FRAME CUTTING TECHNIDUES & OPERATING INSTRUCTIONS INCLUDED UP TO 41 SEND $500 FOR 60 PAGE CATALOG straight no tendency snap roll drop wing tip 3 slow ground speeds difficult turn model steerable nose wheel individual main gear brakes 4 ABS skin does vibrate excessively regardless engine rpm 5 Theoretically model should fly well 34 pounds hut have yet test theory 6 Elevator trim changes required flaps activated 7 Landings docile 200 400 flaps Forty degrees flap quickly slows plane greatly increases rate descent 8 No control flutter encountered 9 aircraft will spin CG less 20% full control travel CONCLUSIONS project would have successful help encouragement individuals organizations strongly recommend modelers patronize manufacturers distributors mentioned article Further wish thank flight assistantsGus Rebensburg Jerry Reichow Duncan Stewartfor time effort Based test results am now con fident feasible develop full-scale Snipe As am detail-designing big Snipe will continue use -scale model test different features building techniques cant wait get started bending tin summer 1998 Ill let know full-scale aircraft flies leads final question build full-scale model prototype -scale aircraft can enter sanctioned AMA scale contest lope SoaringlByors Continued page 106 required servo fact typical microservo will extend retract landing gear well open landing gear doors Gene has also designed over-center system retractable landing gear landing no force transmitted servo might strip servos gears over-center system also works retracted mode wheels inertia cannot throw gear out open ruggedness retract system surprising Gene has tested gear design doing push-ups install gear builder custom-fits fuselage between two bulkheads installation method serves two purposes First bulkhead mounting provides very rugged attachment inside fuselage gear cannot broken loose landing impact mounting system lets builder adjust depth wheel extension through fuselage Now meticulous scale builder want best retractable gear money can buy Cope retract probably worth considering Gene offers retract two sizes has -scale version currenfly priced $125 Cope also offers supersize -scale retract will handle really big birds tells sometime not-too-distant future will offering -scale model too Cope Retracts can contacted 32031/2 Main St Union Gap WA 98903 telephone number 509 457-9017 modelers friends contacted during month Mr Darrel Johnson Mesa Arizona suggested discuss balance models Well perfectly honest sometimes just mount model atop left right index fingers quick dirty Other times ever procedure bit exacting use balance stand balance stand simple device can built just few minutes aid good old Hot Stuff similar product stand built -inch plywood other plywood approximately size drawing outlines construction shows supporting fillets keep stand breaking large load applied drawing also details round edge stand upon model placed reason use stand quite obvious want obtain balance point model accurately possible stand much easier Using fingers balance model turns procedure somewhat juggling act However can place model stand make weight VIDEO_____ JOY OF FLYING FREE very informative 42 minute VHS video displaying phenomena free flight its variations great PR video can used effectively educate uninitiated art model aviation video professionally produced National Free Flight Society features both indoor outdoor activity available NIFFS 1655 Revere Drive Brookfield WI 53045 * Include Check $2500 plus $300 P&H per tape Buy 4 VgPEOS FREE #17 92 SCALEMASTER CHAMPS STAR MUS PIMA AIR MUS ALABAMA 2 Hrn.$1995 #16 AIRCRAFT GUNTERSYILLE AL AVAL AIR MUS PENSACOLA FL 2 Hn.51996 #1 592 WORLD SCALE CHAMPSAMA INVTL SHOOTOUT W INTL SCALEMASTERS 2 Hn.$1995 #1492 NW SEAPLANE CHAMPS EN SCALE AVIATION IN AUSTRALIA2 Hm.$1995 3 op Gun Invitari oledo Model topo s Air Museum2 Nra. 51996 #12- 91 Scalemasters tao Vegas 91 DSAA Las Vegas 91 NWlntl2 Hre.$1916 C #11 Scalemaster Aircraft Preview Mfg Visdw1tlan Parsons- 91 NWteaplanethamps 2 Kn.S1996 Z#1O 91 Tup Gun W Palm Bch Fl SsA Lao Vegas W Model topu2 Iin.$1996 90 Scalemasters Champs Irving TX hidbey 101 Scalemos5ers an Diego Aerospace Moo 2 Hra.51996 90 NW Intl Scalemasters Farragot Park-Athol ID m Champlin Fighter Museum w/tou Proctor W Seaplane ps Santa Monica Mos Flying 2 Mn. 51995 #7 op Gun Invitational Mesa AZ W Model Eupo2 Hrs.$1995 #6 89 Scalemasters Champs St Louis ake lianaso m Schneider Cop Races2 IIrs.$19gG 89 US NaIls Scale & Seaplanes 89 NW Seaplane Champs Planes Fame taut Moo Moo DshkoshVisit mw/Ralph Beck Chicago Mo Sci & Ind 2 Hs.$1995 #4 09 Top Gon Champo Coral Springs FL tor Albatroo DVA Preview atIs Seaplane Site NW ntl oScalemasters tor N-li Test Flight 2 Hre.S1I96 IA Special Edition Proctor Enterprises Atbatroo OVA Brief Conotr Engine Radio Irrntall& Teat Ftigbto 2 Hra $1996 Cuetias JN4D Jenny Plan FUN SCALE 109 inches 1804 sq 11 lbs 8 sheets w/instroctions 51996 10807 SE STACY CT PORTLAND OR 97266 PHONE 503653-25780 FAX 503 6781342 SEND STAMP FOR COMPLETE LIST PAL & SECAM ORDERS CONCEPTS 17 MILPERA CRESCENT WANTIRNA VIC 3152 AUSTRALIA e 03801-3899 03887-3472 BETA CARLSON ENGINE IMPORTS 814 East Marconi Phoenix AZ 85022-3112 IMPORTED DIESEL ENGINES Worlds Best Selection AE AM Aurora Cipolla D-C KMD MAP Mikro MK MWS Oliver PAW Pfeffer Silver Swallow USE Also Replica Mills MOVO Letmo diesels rare imported glow engines CO motor sets Ten page catalog 1 00 May1993 175 visaBJrn/c ELECTRONICS WE HAVE OVER 26 YEARS EXPERIENCE IN &C AT WE 1466 windward dr mason ohio 45040 ph 513 398-5423 KS METAL Aluminum/Brass/Copper Tubing & Shapes Music Wire 0 Tools Soldering Irons Silk Silk Span Finishing Materials SEND $100 FOR PRICE USIMfI CATALO KS Enginwing 6917 W 59th Street Chicago IL 60638312/5868503 adjustments quite easily Also once balance point suits flying style obtained mark can easily transferred model reference should also pointed out uprights stand three inches wide making wide pounds per square inch exerted balance point bottom wing lowered uprights wide enough small balance points model will sit during balancing process can dent wing Make uprights wide enough reduce pounds per square inch will impart wing obtaining accurate balance point model should consider balancing being performed flying site balance usually accurate unless wind calm case what doing slope inaccuracy occurs because wind pushes model around models nose jumps up down other hand balance calibration shop no air movement can quite accurate type balance provides modeler chance add just right amount weight nose aircraft either teeters balance mark just slightly droops its nose Hope little idea will help get aircraft balanced just right you will discover much pleasurable previously unruly model fly Airfoil month month want share Selig 6063 section section computer generated Michael Selig especially glider fliers have speed running through veins quite thin thickness 706% provides very low profile drag rather telling about would like quote Michael Michaels comments paper sent after 1990 Mid-Columbia Scale Fun-Fly paper titled Three New Airfoils Designed Slope Soaring paper Michael says request several people met past May Tri-Cities Scale Fun Fly have designed three new slope soaring SUNGLASSES 195 100% UV Protection Shatterproof Excellent Optical Quality Tints Fit Over Prescriptions SKYS RO BOX 1000 UMFRIES VA 22026 800-227-9318 airfoils spin-offs 5D6060 common find sariplanes airfoil names like modified E205 E374-9% thinned E374 Certainly slight modifi cation original airfoil will devastate performance modified airfoil will no longer retain favorable characteristics designed original typical modification would scale airfoil y-coordinates some fraction order reduce thickness simple scaling does operate properly airfoil velocity distribution itself derived boundaiy-layer considerations airfoil design process particular airfoil thickness desired requirement best achieved during initial design effort order retain favorable boundary-layer characteristics simultaneously matching thickness specification S6061 9% thick airfoil along lines 104% thick 5D6060 drag predictions made using Drela XFOIL code incompressible version ISES code used aid design SD airfoils presented Soartech #8 Using Princeton airfoil data base found XFOIL code does predict low-Reynolds-number airfoil performance fairly accurately can used compare airfoil designs comparison made constant Reynolds number R0 typically done instead R0 times square root C1 00 Thus Reynolds number varies 1/Square Root C1 C1 decreases R0 increases visa versa can shown such variation R0 follows aircraft flight case Cd plotted corresponds aircraft flight Since constant 125000 aircraft flying C1 ould have R0 00 typical slope soaring aircraft S6061 9% thick section Michael also computer generated compared S6063 7% thick section thinner airfoil produces lower drag Also width low-drag range reduced decreasing thickness Since airfoils intended mainly slope soaring lower limit polar Continued page 180 ZENOAH & OIJ ERCOUPE & J- KITFEN iui ZINGER PROPS CARBON FIBER B&BPRODU DU-BRO GIANT SC 510 ECONITE REIDS 16 MaIn St Phelps NY 145Z 315-548-3779 176 Model Aviation UNE METAL SPECIAUSTS Renogniad Ceflit ledA Aedetset File No____ File Nof Pomer P26226 LR251 64PdOOtS Itto Only certified checks o money orders accepted Minimum otder 614SOfortheepackagesof4 PomerpoleslgdOiperpackage $200 Shipping handlingi CT residents add sales tao Pices suhject change notice DEALER INQUIRIES INVITED furthe information dealer prices send SASE Rosiness Card SERMOS R/C SNAP CONNECTORS Inc Cedar Corners Station Box 16787 Stamford CT 06905 203 322-6294 GATOR TRANSMITEER CASE feather lite GLASS CLOTH 7 az/sq yd weight close weave makes glass cloth easy filling extremely light finished weIght Big 3 sq yd package detailed instructions$895 50FF-N-SAFE MOUNTS new type engine soft mount using special ribbed Iso-damp grommela Engine always safely retained Vesy effective vibration reduction dramatic decrease engine shake Available vely light machined alum beam mount 60 2/strokes 120 4/strokes Also available alum plate radial mount 60 2/strokes Soft-N-SaIe 120 beam mount complete.S2995 5SoftN Safe 60 beam mounl complete..S2495 5SoftNSafe 60 radial mount complete.S129S Replacement grommets 120 mount.A/495 *Replacesnent grommeta 60 mount 4/295 RADIAL ISO-MOUNTS Conventional plate type mount using four Lord/type 60 Duro Iso-mounts Optimized lowest vibration transmission airframe reduced engine shake 60 Radial Iso-mount complete mount..S1495 5Isomotiits Pkg four 995 5/8 dia x 1/2 long 8-32 female end 832 x 1/2 male other end 60 Duro rubber RC Slope SoaringlByers Continued page 176 held fixed near C1 approximately equal 00 upper limit dictated indi rectly airfoil thickness requirements What think Maybe should give S-6063 try some really hot straight line passes Yeah yeah know careful Thanks again reading column Please pass along ideas adventures shared rest slope soaring community urationlMurphy Continued page 108 afford added weight on-off toggle switch DT-fuse-actuated microswitch keep power off until model DTed added weight easily compensated removing weight elsewhere model such lighter wheels lighter batteries lighter coil other such belttightening steps Since SAM-legal model must weigh mimmum 263 ounces anyway added weight provided littleif anyhandicap model performance Remember what said beginning Systems selection will also depend intended application Some may question DT-actuated devices mere battery savers sacrificing use flyaway situations DT fails function suppose could argue 10 miles off course well out sight model couldnt hear device operating worst out cost model plus small amount have invested system Conversely 10 miles off course out sight model carrying $125 electronic transmitters chances going get back via model-finder system either Thus out additional $125 rather 10 spot Well much what-if scenarios about enough verbiage model finders session will cut off until review another system two next F send *100 illustratsd catalogue 0warbirds 39 inch span 70pawered slope gliders sliders 1930s Telephone 714 77541530sailboats trio macas PO BOX 1249 MINSTER CA 92684-1249 time Remember columnist welcomes information effective system available modelerswhether commercial cottage industry brainstorm sourcesthat would justify review series reports Keep cards letters coming folks thank ye kindly New publications catalogs Terry Rimerts Fly-By-Night Press has issued its third plan book Nostalgia Gas designs aptly named Third Nostalgia book contains reduced-size plans designs era accent 1/2A designs such Kiwi Frank Garcher s Midwest Fortastrop Samuelson s Half Wild Goose AJ Phillipss Yo-Ho Mahieus 1/2A Zeek Zigenfuse Pogo Russ Hansens T Bird /2A Sobala Geef Sal Taibis Spacer others Some larger models also included like Ed Howes classic Stare designed 29-35 displacement engines Denny Daviss Ultra Hogan some dated British designs peruse well including Y-Bar Creep Eliminator have thought would great benefit catalog three-views reduced plan drawings published kitted designs could made available serve reference guide well just plain entertainment looks Terry getting us slowly surely third volume NosGas designs Terry advises source issue first two volumes Lee Campbell Campbells Custom Kits price $10 plus $2 postage Book Nostalgia $8 Nostalgia Too $10 course add appropriate postage volumes well Lees address 401 Executive Center Dr Suite H-lOS West Palm Beach FL 33401 Tell em Duration sent British equivalent annual NFFS Symposium Free Flight Forum published BMFA British Model Flying Association 1992 edition available Martin Dilly 20 Links Rd West Wickam Kent BR4 OQW England 830 pounds Payment should check payable BMFA Free Flight Team Travel Fund equivalent pounds sterling drawn PRODUCTS FOR ThE DISCERNING MODELER Complete Line Exhaust Systems d Pipes5 Muffled Tuned Pipes Headers uri Mufflers Expansion Mufflers copter Ball Mufflers ialized Exhaust Systems Unsurpass Model Aviation dy high-density molded plastic 5Cushions impact resists weather 5Strong double hinges durable latch 5Convol foam liner Oreat storing spare transmitters New low price..$l495 Include $350/Item S&HdlaL Residents Add 6% Tax GATOR R/C PRODUCTS INC 3713 Pompano Dr Pensacola FL 32514 Phone 904 494-0203 904 494-0207
Edition: Model Aviation - 1993/05
Page Numbers: 104, 105, 106, 175, 176, 180
T URNIN AND BURNIN Thats what slope racing about tumin hard fast burnin down straights next pylon what consider pinnacle RC soaring models often travel well excess 100 mph during commencement dive start/finish gate Also sleek race models will fly wing tip wing tip averaging better 70 mph duration race addition what other form modeling tasks race models penetrating winds exceed 40 mph carrying five pounds lead wings None simply nothing like Unlimited Slope Racing model aviation Only best soaring pilots participate best come out winners rest just go real fast love minute Now news comes way 1993 slope soaring season promising racers some big-time racing clubs like California Slope Racers new Pro-Am Slope Racers Unlimited clubs hosting major events California Slope Racers promising racers International Slope Races new Pro-Am Slope Racers Unlimited up northwest corner US announcing its total dedication slope racing interested slope racers hosting 1993 Mid-Columbia Cup Slope Races MCCSR MCCSR offering unlimited racers both cash purse chance race under two-man rnles developed 1992 cash purse year $1000 firstplace winner additional cash prizes second third second- third-place awards will depend amount entry receipts new two-man format outlined July 92 MA column affords racers style unlimited racing much less prone midair collisions Pro-Am Slope Racers Unlimited expects new format pit best against best unlimited racing may interested know unlimited racer model carries maximum wing loading 2451 ounces per square foot and/or weighs maximum 11023 pounds new format deviates slightly now-standard four-models-in-a-heat arrangement allow two models racing per heat Additionally rules adopted Pro-Am Slope Racers score races line internationally recognized FAI events Although races still man-on-man MOM scored percentage perfect heat round similar F3F Therefore emphasis speed model able complete racecourse As result pilots challenged compete racers time models enter heat So main difference scoring follows 104 Model Aviation HO CONTROL SLOPE SOARING Conrad excited about flying dad Joseph also happy show oft dads model Dennis Gray demonstrates fine art tossing home-brew wingeron sloper brisk breeze Mike Brown shows off sleek quick V5 Sailplanes Rotor Dean Farnham shows us nicely detailed model conglomeration design ideas likes Hosted Torrey Pines Gulls California Slope Racers May 1-21993 Toney Pines Gliderport La Jolla CaliFornia Seven Rounds Unlimiled Sbpe Racing applicable AMA rules apply Big BBO night fly cliff Saturday night Dnt miss J Percentage-of-perfect heat scores 1 Fastest time awarded 1000 points 2 Second awarded 1st place time/2nd place time x 1000 3 DNF Did Finish awarded 100 points 4 DNS Did Start awarded zero points Percentage-of-perfect round scores 1 Fastest round time awarded 1000 points 2 Other round finishers awarded points fastest round time/respective round time X 1000 example [Fastest round finisher 13 l]I[ 142 r finishers respective time] x 1000 points 3 DNE receives 50 points 4 DNS receives zero points A025 H complete rules published February 1992 issue RIC Soaring Digest can get detailed information rules entry form MCCSR sending SASE Pro-Am Slope Racers Unlimited 606 N White Walla Walla WA 99362 may also give Contest Directors Joe Conrad Roy Lightle call 206 630-2670 509 525-7066 respectively See hope BKwKN NP SE 1/4 PYWDDD DR EDUIVAENT FDR STAND AND 4Th BRACES V025 END VIEV SILL VILE TEE VIEoJ PI -o2S P Left balance stand simple device built -in plywood Below airfoil month Selig 6063 section thin 706% section provides low profile drag May1993 105 ml enirypa&age ormwe dannaiion cci Slew Condon 0 619594-7821 Notice sturdy mounting brackets Cope retract well superb detail hinge points 4 Aviation Software for Modelers Model Pilots Logbook MaIntain record modalng Input dates weather condlilone modeln number Illghta made mid notes SummarIze flyIng acliviilse juat aelected model veralona avalable bout power model mid eanplane pflota Easy use menu dstven QalyJatE Airfoil Designer Oraphicaly display stuidud airfoIl shapes Specify airfoil type thicimees andor chord width model dee~ create tapered wing deelgna dli ferentairfoll shapes stute root mid tIp Graphics can output CAD visa DXF pointers plotters Easy use VGA graphIcal QniyI3LM spoly ilk ate abs Nsch Saud check 4 moesy ardta IDU Software L SL Uncoil, NE mio SIG MANUFACTURING CO now imports complete line world record holding ROSSI aircraft marine helicopter race car engines includes full line parts accessories plus full time ROSSI REPAIR CENTER US SIG-im ported ROSSI engines come full 90 day SIG WARRANTY against work manship manufacturing defects SIG MANUFACTURING CO INC . Montezuma IA 50171 PH 515-623-5154FAX 515-623-3922ToIl Free Orders 800-247-5008 Discovery Park Thanksgiving normally weekend obligation simply means have stop doing model airplane stuff usually occupies much spare time dedicate time family food wine thanksgiving year somewhat different pastand happily Yes still above year took family Seattle Thanksgiving dinner brother-in-law sister-inlaws home food great fun playing kids however six hours TV football bit excessive way thinking Friday following Turkeyday bet wished buzzards fortunately found us slope site just two miles in-laws As know Seattle hilly city also known its rain trees evergreen trees isand grow everywhere Well Discovery Park located just couple miles north downtown Seattle few places haired over trees also area sports nice cliff approximately 200 feet high faces southwest Since wind weather usually blow southwest Discovery Park ideal area slope soarers frequentand first outing Discovery Park back 1976 friend introduced slope soaring moved Seattle 1979 Tn-Cities havent flown site since Well flying sites Discovery Park has become much crowded both model fliers spectators Discovery Park now offers place individuals walk picnic fly kites slope soar generally just have fun Before hear about great models flying site want mention people watching high-powered models zoom overhead kinda frightening since usually fly Eagle Butte attracts mostly fliers spectators because Eagle Butte mostly fliers spectators models usually arent zooming over heads spectators So saw number spectators happily watching models whipped over heads brought about certain feeling concern flying site flying shared sites might wise remind ourselves zooming models have great deal energy stored speed through air Because stored energy could very harmful anyone might hit Think about four-pound model traveling 100 mph damage model could hit someone would certainly affect flying site very well could hurt someone seriously further emphasize much energy stored model lets look results calculation kinetic energy model similar described above formula /2 my2 numbers add up 1344 foot-pounds energy lot isnt Now what would 11-pound slope racer have stored it zooms 120 mph about 5324 foot-pounds So its probably worth being careful courteous always thinking about model respect spectators other fliers After attorneys arent cheap models gracing skies above Discoverys cliff day family visited mostly wingeron ships Sig Samurai VS Sailplanes Rotor home-brew design based leftover VS Sailplane parts another home-brew much like VS Sailplane Chuckar Russian Yak Bob Martin Bob Cat number other models made trek out slope didnt fly wind bit too brisk models either too light conditions modelers confident enough toss sometimes-turbulent air havent seen wingeron wingevator airplane fly quite interesting First lets explain what wingeron plane model simply moves wings effect roll control wingevator glider model has fixed-incidence elevator moves wings effect both pitch roll other words wing incidence decreases effect down elevator rises increase incidence between wing elevator effectively creating up elevator type model known its maneuverability VS Safiplanes designs also noted speed penetra tion day no exception wingeron machines airfoils models using pretty much similar using Eppler 374 modified E-374 now-popular SD-6060 airfoil sections have moderate mean camber line therefore have very modest pitching moment can also penetrate wind need Airfoils like 374 6060 capable performing nice aerobatics pilots skill allows interested wingeron wingevator models suggest contact VS Sailplanes Sig Manufacturing information address VS Sailplanes 723 Broadway East Seattle WA 98102 telephone number 206 860-7711 Sig Manufacturing located Montezuma IA 50171 telephone number 515 623-5154 Cope Retracts now offers what doubt true-to-scale retract available RC scale soaring pilot anywhere world retracts designed built Gene Cope Gene scale RC soaring enthusiast simply could find retractable landing gear accurate enough scale detail satisfy taste Genes answer manufacture own copying design full-scale Kestrel 19 efforts resulted absolutely true scale landing gear accurate detail rugged enough withstand roughest landing 11-pound scale model Cope retract made 4130 steel tubing silver brazed together building jig building gear system jig Gene assures retract will accurate true Thus gear operates smoothly surprisingly little torque Continued page 17S 106 Model Aviation S ON PRO-BOW THIS UNIDUEDEVICEALLOWS YOU TO CUT ACCU RATE WING CORES WITHOUT EXPENSIVE AND COMPLICATED EOUIPMENT WITH THE PRO-BOW THE CUTTING WIRE IS GUIDED DIRECTLY AT THE TEMPLATES BY HAND HELD INSULATOR CLIPS THE HEAVY-DUTY CONSTRUCTION GIVES GOOD FEEL TO THE BOW AND WITH THE ADJUSTABLE HEAT PROBE THE WIRE TEMPERATURE CAN BE CONTROLLED FOR PERFECT CUTTING RESULTS sale $4295 VISA & MASTERCARD ACCEP TEDADD $500 SHIPPING IN USAIL RESIDENTS ADD 7% TAX WING MFG 306 E SIMMONS GALESBURS IL 61401 CALL 309-342-3009 WORKS DIRECTLY OFF OF 12 VOLT BATTERY OR 10 AMP BATTERY ThdGER S COMPLETELY ASSEMBLED STRAIGHT DR TAPERED CORES IAL PASSIVE RESISTANCE CUTTING WIRE LATED STEEL FRAME CUTTING TECHNIDUES & OPERATING INSTRUCTIONS INCLUDED UP TO 41 SEND $500 FOR 60 PAGE CATALOG straight no tendency snap roll drop wing tip 3 slow ground speeds difficult turn model steerable nose wheel individual main gear brakes 4 ABS skin does vibrate excessively regardless engine rpm 5 Theoretically model should fly well 34 pounds hut have yet test theory 6 Elevator trim changes required flaps activated 7 Landings docile 200 400 flaps Forty degrees flap quickly slows plane greatly increases rate descent 8 No control flutter encountered 9 aircraft will spin CG less 20% full control travel CONCLUSIONS project would have successful help encouragement individuals organizations strongly recommend modelers patronize manufacturers distributors mentioned article Further wish thank flight assistantsGus Rebensburg Jerry Reichow Duncan Stewartfor time effort Based test results am now con fident feasible develop full-scale Snipe As am detail-designing big Snipe will continue use -scale model test different features building techniques cant wait get started bending tin summer 1998 Ill let know full-scale aircraft flies leads final question build full-scale model prototype -scale aircraft can enter sanctioned AMA scale contest lope SoaringlByors Continued page 106 required servo fact typical microservo will extend retract landing gear well open landing gear doors Gene has also designed over-center system retractable landing gear landing no force transmitted servo might strip servos gears over-center system also works retracted mode wheels inertia cannot throw gear out open ruggedness retract system surprising Gene has tested gear design doing push-ups install gear builder custom-fits fuselage between two bulkheads installation method serves two purposes First bulkhead mounting provides very rugged attachment inside fuselage gear cannot broken loose landing impact mounting system lets builder adjust depth wheel extension through fuselage Now meticulous scale builder want best retractable gear money can buy Cope retract probably worth considering Gene offers retract two sizes has -scale version currenfly priced $125 Cope also offers supersize -scale retract will handle really big birds tells sometime not-too-distant future will offering -scale model too Cope Retracts can contacted 32031/2 Main St Union Gap WA 98903 telephone number 509 457-9017 modelers friends contacted during month Mr Darrel Johnson Mesa Arizona suggested discuss balance models Well perfectly honest sometimes just mount model atop left right index fingers quick dirty Other times ever procedure bit exacting use balance stand balance stand simple device can built just few minutes aid good old Hot Stuff similar product stand built -inch plywood other plywood approximately size drawing outlines construction shows supporting fillets keep stand breaking large load applied drawing also details round edge stand upon model placed reason use stand quite obvious want obtain balance point model accurately possible stand much easier Using fingers balance model turns procedure somewhat juggling act However can place model stand make weight VIDEO_____ JOY OF FLYING FREE very informative 42 minute VHS video displaying phenomena free flight its variations great PR video can used effectively educate uninitiated art model aviation video professionally produced National Free Flight Society features both indoor outdoor activity available NIFFS 1655 Revere Drive Brookfield WI 53045 * Include Check $2500 plus $300 P&H per tape Buy 4 VgPEOS FREE #17 92 SCALEMASTER CHAMPS STAR MUS PIMA AIR MUS ALABAMA 2 Hrn.$1995 #16 AIRCRAFT GUNTERSYILLE AL AVAL AIR MUS PENSACOLA FL 2 Hn.51996 #1 592 WORLD SCALE CHAMPSAMA INVTL SHOOTOUT W INTL SCALEMASTERS 2 Hn.$1995 #1492 NW SEAPLANE CHAMPS EN SCALE AVIATION IN AUSTRALIA2 Hm.$1995 3 op Gun Invitari oledo Model topo s Air Museum2 Nra. 51996 #12- 91 Scalemasters tao Vegas 91 DSAA Las Vegas 91 NWlntl2 Hre.$1916 C #11 Scalemaster Aircraft Preview Mfg Visdw1tlan Parsons- 91 NWteaplanethamps 2 Kn.S1996 Z#1O 91 Tup Gun W Palm Bch Fl SsA Lao Vegas W Model topu2 Iin.$1996 90 Scalemasters Champs Irving TX hidbey 101 Scalemos5ers an Diego Aerospace Moo 2 Hra.51996 90 NW Intl Scalemasters Farragot Park-Athol ID m Champlin Fighter Museum w/tou Proctor W Seaplane ps Santa Monica Mos Flying 2 Mn. 51995 #7 op Gun Invitational Mesa AZ W Model Eupo2 Hrs.$1995 #6 89 Scalemasters Champs St Louis ake lianaso m Schneider Cop Races2 IIrs.$19gG 89 US NaIls Scale & Seaplanes 89 NW Seaplane Champs Planes Fame taut Moo Moo DshkoshVisit mw/Ralph Beck Chicago Mo Sci & Ind 2 Hs.$1995 #4 09 Top Gon Champo Coral Springs FL tor Albatroo DVA Preview atIs Seaplane Site NW ntl oScalemasters tor N-li Test Flight 2 Hre.S1I96 IA Special Edition Proctor Enterprises Atbatroo OVA Brief Conotr Engine Radio Irrntall& Teat Ftigbto 2 Hra $1996 Cuetias JN4D Jenny Plan FUN SCALE 109 inches 1804 sq 11 lbs 8 sheets w/instroctions 51996 10807 SE STACY CT PORTLAND OR 97266 PHONE 503653-25780 FAX 503 6781342 SEND STAMP FOR COMPLETE LIST PAL & SECAM ORDERS CONCEPTS 17 MILPERA CRESCENT WANTIRNA VIC 3152 AUSTRALIA e 03801-3899 03887-3472 BETA CARLSON ENGINE IMPORTS 814 East Marconi Phoenix AZ 85022-3112 IMPORTED DIESEL ENGINES Worlds Best Selection AE AM Aurora Cipolla D-C KMD MAP Mikro MK MWS Oliver PAW Pfeffer Silver Swallow USE Also Replica Mills MOVO Letmo diesels rare imported glow engines CO motor sets Ten page catalog 1 00 May1993 175 visaBJrn/c ELECTRONICS WE HAVE OVER 26 YEARS EXPERIENCE IN &C AT WE 1466 windward dr mason ohio 45040 ph 513 398-5423 KS METAL Aluminum/Brass/Copper Tubing & Shapes Music Wire 0 Tools Soldering Irons Silk Silk Span Finishing Materials SEND $100 FOR PRICE USIMfI CATALO KS Enginwing 6917 W 59th Street Chicago IL 60638312/5868503 adjustments quite easily Also once balance point suits flying style obtained mark can easily transferred model reference should also pointed out uprights stand three inches wide making wide pounds per square inch exerted balance point bottom wing lowered uprights wide enough small balance points model will sit during balancing process can dent wing Make uprights wide enough reduce pounds per square inch will impart wing obtaining accurate balance point model should consider balancing being performed flying site balance usually accurate unless wind calm case what doing slope inaccuracy occurs because wind pushes model around models nose jumps up down other hand balance calibration shop no air movement can quite accurate type balance provides modeler chance add just right amount weight nose aircraft either teeters balance mark just slightly droops its nose Hope little idea will help get aircraft balanced just right you will discover much pleasurable previously unruly model fly Airfoil month month want share Selig 6063 section section computer generated Michael Selig especially glider fliers have speed running through veins quite thin thickness 706% provides very low profile drag rather telling about would like quote Michael Michaels comments paper sent after 1990 Mid-Columbia Scale Fun-Fly paper titled Three New Airfoils Designed Slope Soaring paper Michael says request several people met past May Tri-Cities Scale Fun Fly have designed three new slope soaring SUNGLASSES 195 100% UV Protection Shatterproof Excellent Optical Quality Tints Fit Over Prescriptions SKYS RO BOX 1000 UMFRIES VA 22026 800-227-9318 airfoils spin-offs 5D6060 common find sariplanes airfoil names like modified E205 E374-9% thinned E374 Certainly slight modifi cation original airfoil will devastate performance modified airfoil will no longer retain favorable characteristics designed original typical modification would scale airfoil y-coordinates some fraction order reduce thickness simple scaling does operate properly airfoil velocity distribution itself derived boundaiy-layer considerations airfoil design process particular airfoil thickness desired requirement best achieved during initial design effort order retain favorable boundary-layer characteristics simultaneously matching thickness specification S6061 9% thick airfoil along lines 104% thick 5D6060 drag predictions made using Drela XFOIL code incompressible version ISES code used aid design SD airfoils presented Soartech #8 Using Princeton airfoil data base found XFOIL code does predict low-Reynolds-number airfoil performance fairly accurately can used compare airfoil designs comparison made constant Reynolds number R0 typically done instead R0 times square root C1 00 Thus Reynolds number varies 1/Square Root C1 C1 decreases R0 increases visa versa can shown such variation R0 follows aircraft flight case Cd plotted corresponds aircraft flight Since constant 125000 aircraft flying C1 ould have R0 00 typical slope soaring aircraft S6061 9% thick section Michael also computer generated compared S6063 7% thick section thinner airfoil produces lower drag Also width low-drag range reduced decreasing thickness Since airfoils intended mainly slope soaring lower limit polar Continued page 180 ZENOAH & OIJ ERCOUPE & J- KITFEN iui ZINGER PROPS CARBON FIBER B&BPRODU DU-BRO GIANT SC 510 ECONITE REIDS 16 MaIn St Phelps NY 145Z 315-548-3779 176 Model Aviation UNE METAL SPECIAUSTS Renogniad Ceflit ledA Aedetset File No____ File Nof Pomer P26226 LR251 64PdOOtS Itto Only certified checks o money orders accepted Minimum otder 614SOfortheepackagesof4 PomerpoleslgdOiperpackage $200 Shipping handlingi CT residents add sales tao Pices suhject change notice DEALER INQUIRIES INVITED furthe information dealer prices send SASE Rosiness Card SERMOS R/C SNAP CONNECTORS Inc Cedar Corners Station Box 16787 Stamford CT 06905 203 322-6294 GATOR TRANSMITEER CASE feather lite GLASS CLOTH 7 az/sq yd weight close weave makes glass cloth easy filling extremely light finished weIght Big 3 sq yd package detailed instructions$895 50FF-N-SAFE MOUNTS new type engine soft mount using special ribbed Iso-damp grommela Engine always safely retained Vesy effective vibration reduction dramatic decrease engine shake Available vely light machined alum beam mount 60 2/strokes 120 4/strokes Also available alum plate radial mount 60 2/strokes Soft-N-SaIe 120 beam mount complete.S2995 5SoftN Safe 60 beam mounl complete..S2495 5SoftNSafe 60 radial mount complete.S129S Replacement grommets 120 mount.A/495 *Replacesnent grommeta 60 mount 4/295 RADIAL ISO-MOUNTS Conventional plate type mount using four Lord/type 60 Duro Iso-mounts Optimized lowest vibration transmission airframe reduced engine shake 60 Radial Iso-mount complete mount..S1495 5Isomotiits Pkg four 995 5/8 dia x 1/2 long 8-32 female end 832 x 1/2 male other end 60 Duro rubber RC Slope SoaringlByers Continued page 176 held fixed near C1 approximately equal 00 upper limit dictated indi rectly airfoil thickness requirements What think Maybe should give S-6063 try some really hot straight line passes Yeah yeah know careful Thanks again reading column Please pass along ideas adventures shared rest slope soaring community urationlMurphy Continued page 108 afford added weight on-off toggle switch DT-fuse-actuated microswitch keep power off until model DTed added weight easily compensated removing weight elsewhere model such lighter wheels lighter batteries lighter coil other such belttightening steps Since SAM-legal model must weigh mimmum 263 ounces anyway added weight provided littleif anyhandicap model performance Remember what said beginning Systems selection will also depend intended application Some may question DT-actuated devices mere battery savers sacrificing use flyaway situations DT fails function suppose could argue 10 miles off course well out sight model couldnt hear device operating worst out cost model plus small amount have invested system Conversely 10 miles off course out sight model carrying $125 electronic transmitters chances going get back via model-finder system either Thus out additional $125 rather 10 spot Well much what-if scenarios about enough verbiage model finders session will cut off until review another system two next F send *100 illustratsd catalogue 0warbirds 39 inch span 70pawered slope gliders sliders 1930s Telephone 714 77541530sailboats trio macas PO BOX 1249 MINSTER CA 92684-1249 time Remember columnist welcomes information effective system available modelerswhether commercial cottage industry brainstorm sourcesthat would justify review series reports Keep cards letters coming folks thank ye kindly New publications catalogs Terry Rimerts Fly-By-Night Press has issued its third plan book Nostalgia Gas designs aptly named Third Nostalgia book contains reduced-size plans designs era accent 1/2A designs such Kiwi Frank Garcher s Midwest Fortastrop Samuelson s Half Wild Goose AJ Phillipss Yo-Ho Mahieus 1/2A Zeek Zigenfuse Pogo Russ Hansens T Bird /2A Sobala Geef Sal Taibis Spacer others Some larger models also included like Ed Howes classic Stare designed 29-35 displacement engines Denny Daviss Ultra Hogan some dated British designs peruse well including Y-Bar Creep Eliminator have thought would great benefit catalog three-views reduced plan drawings published kitted designs could made available serve reference guide well just plain entertainment looks Terry getting us slowly surely third volume NosGas designs Terry advises source issue first two volumes Lee Campbell Campbells Custom Kits price $10 plus $2 postage Book Nostalgia $8 Nostalgia Too $10 course add appropriate postage volumes well Lees address 401 Executive Center Dr Suite H-lOS West Palm Beach FL 33401 Tell em Duration sent British equivalent annual NFFS Symposium Free Flight Forum published BMFA British Model Flying Association 1992 edition available Martin Dilly 20 Links Rd West Wickam Kent BR4 OQW England 830 pounds Payment should check payable BMFA Free Flight Team Travel Fund equivalent pounds sterling drawn PRODUCTS FOR ThE DISCERNING MODELER Complete Line Exhaust Systems d Pipes5 Muffled Tuned Pipes Headers uri Mufflers Expansion Mufflers copter Ball Mufflers ialized Exhaust Systems Unsurpass Model Aviation dy high-density molded plastic 5Cushions impact resists weather 5Strong double hinges durable latch 5Convol foam liner Oreat storing spare transmitters New low price..$l495 Include $350/Item S&HdlaL Residents Add 6% Tax GATOR R/C PRODUCTS INC 3713 Pompano Dr Pensacola FL 32514 Phone 904 494-0203 904 494-0207
Edition: Model Aviation - 1993/05
Page Numbers: 104, 105, 106, 175, 176, 180
T URNIN AND BURNIN Thats what slope racing about tumin hard fast burnin down straights next pylon what consider pinnacle RC soaring models often travel well excess 100 mph during commencement dive start/finish gate Also sleek race models will fly wing tip wing tip averaging better 70 mph duration race addition what other form modeling tasks race models penetrating winds exceed 40 mph carrying five pounds lead wings None simply nothing like Unlimited Slope Racing model aviation Only best soaring pilots participate best come out winners rest just go real fast love minute Now news comes way 1993 slope soaring season promising racers some big-time racing clubs like California Slope Racers new Pro-Am Slope Racers Unlimited clubs hosting major events California Slope Racers promising racers International Slope Races new Pro-Am Slope Racers Unlimited up northwest corner US announcing its total dedication slope racing interested slope racers hosting 1993 Mid-Columbia Cup Slope Races MCCSR MCCSR offering unlimited racers both cash purse chance race under two-man rnles developed 1992 cash purse year $1000 firstplace winner additional cash prizes second third second- third-place awards will depend amount entry receipts new two-man format outlined July 92 MA column affords racers style unlimited racing much less prone midair collisions Pro-Am Slope Racers Unlimited expects new format pit best against best unlimited racing may interested know unlimited racer model carries maximum wing loading 2451 ounces per square foot and/or weighs maximum 11023 pounds new format deviates slightly now-standard four-models-in-a-heat arrangement allow two models racing per heat Additionally rules adopted Pro-Am Slope Racers score races line internationally recognized FAI events Although races still man-on-man MOM scored percentage perfect heat round similar F3F Therefore emphasis speed model able complete racecourse As result pilots challenged compete racers time models enter heat So main difference scoring follows 104 Model Aviation HO CONTROL SLOPE SOARING Conrad excited about flying dad Joseph also happy show oft dads model Dennis Gray demonstrates fine art tossing home-brew wingeron sloper brisk breeze Mike Brown shows off sleek quick V5 Sailplanes Rotor Dean Farnham shows us nicely detailed model conglomeration design ideas likes Hosted Torrey Pines Gulls California Slope Racers May 1-21993 Toney Pines Gliderport La Jolla CaliFornia Seven Rounds Unlimiled Sbpe Racing applicable AMA rules apply Big BBO night fly cliff Saturday night Dnt miss J Percentage-of-perfect heat scores 1 Fastest time awarded 1000 points 2 Second awarded 1st place time/2nd place time x 1000 3 DNF Did Finish awarded 100 points 4 DNS Did Start awarded zero points Percentage-of-perfect round scores 1 Fastest round time awarded 1000 points 2 Other round finishers awarded points fastest round time/respective round time X 1000 example [Fastest round finisher 13 l]I[ 142 r finishers respective time] x 1000 points 3 DNE receives 50 points 4 DNS receives zero points A025 H complete rules published February 1992 issue RIC Soaring Digest can get detailed information rules entry form MCCSR sending SASE Pro-Am Slope Racers Unlimited 606 N White Walla Walla WA 99362 may also give Contest Directors Joe Conrad Roy Lightle call 206 630-2670 509 525-7066 respectively See hope BKwKN NP SE 1/4 PYWDDD DR EDUIVAENT FDR STAND AND 4Th BRACES V025 END VIEV SILL VILE TEE VIEoJ PI -o2S P Left balance stand simple device built -in plywood Below airfoil month Selig 6063 section thin 706% section provides low profile drag May1993 105 ml enirypa&age ormwe dannaiion cci Slew Condon 0 619594-7821 Notice sturdy mounting brackets Cope retract well superb detail hinge points 4 Aviation Software for Modelers Model Pilots Logbook MaIntain record modalng Input dates weather condlilone modeln number Illghta made mid notes SummarIze flyIng acliviilse juat aelected model veralona avalable bout power model mid eanplane pflota Easy use menu dstven QalyJatE Airfoil Designer Oraphicaly display stuidud airfoIl shapes Specify airfoil type thicimees andor chord width model dee~ create tapered wing deelgna dli ferentairfoll shapes stute root mid tIp Graphics can output CAD visa DXF pointers plotters Easy use VGA graphIcal QniyI3LM spoly ilk ate abs Nsch Saud check 4 moesy ardta IDU Software L SL Uncoil, NE mio SIG MANUFACTURING CO now imports complete line world record holding ROSSI aircraft marine helicopter race car engines includes full line parts accessories plus full time ROSSI REPAIR CENTER US SIG-im ported ROSSI engines come full 90 day SIG WARRANTY against work manship manufacturing defects SIG MANUFACTURING CO INC . Montezuma IA 50171 PH 515-623-5154FAX 515-623-3922ToIl Free Orders 800-247-5008 Discovery Park Thanksgiving normally weekend obligation simply means have stop doing model airplane stuff usually occupies much spare time dedicate time family food wine thanksgiving year somewhat different pastand happily Yes still above year took family Seattle Thanksgiving dinner brother-in-law sister-inlaws home food great fun playing kids however six hours TV football bit excessive way thinking Friday following Turkeyday bet wished buzzards fortunately found us slope site just two miles in-laws As know Seattle hilly city also known its rain trees evergreen trees isand grow everywhere Well Discovery Park located just couple miles north downtown Seattle few places haired over trees also area sports nice cliff approximately 200 feet high faces southwest Since wind weather usually blow southwest Discovery Park ideal area slope soarers frequentand first outing Discovery Park back 1976 friend introduced slope soaring moved Seattle 1979 Tn-Cities havent flown site since Well flying sites Discovery Park has become much crowded both model fliers spectators Discovery Park now offers place individuals walk picnic fly kites slope soar generally just have fun Before hear about great models flying site want mention people watching high-powered models zoom overhead kinda frightening since usually fly Eagle Butte attracts mostly fliers spectators because Eagle Butte mostly fliers spectators models usually arent zooming over heads spectators So saw number spectators happily watching models whipped over heads brought about certain feeling concern flying site flying shared sites might wise remind ourselves zooming models have great deal energy stored speed through air Because stored energy could very harmful anyone might hit Think about four-pound model traveling 100 mph damage model could hit someone would certainly affect flying site very well could hurt someone seriously further emphasize much energy stored model lets look results calculation kinetic energy model similar described above formula /2 my2 numbers add up 1344 foot-pounds energy lot isnt Now what would 11-pound slope racer have stored it zooms 120 mph about 5324 foot-pounds So its probably worth being careful courteous always thinking about model respect spectators other fliers After attorneys arent cheap models gracing skies above Discoverys cliff day family visited mostly wingeron ships Sig Samurai VS Sailplanes Rotor home-brew design based leftover VS Sailplane parts another home-brew much like VS Sailplane Chuckar Russian Yak Bob Martin Bob Cat number other models made trek out slope didnt fly wind bit too brisk models either too light conditions modelers confident enough toss sometimes-turbulent air havent seen wingeron wingevator airplane fly quite interesting First lets explain what wingeron plane model simply moves wings effect roll control wingevator glider model has fixed-incidence elevator moves wings effect both pitch roll other words wing incidence decreases effect down elevator rises increase incidence between wing elevator effectively creating up elevator type model known its maneuverability VS Safiplanes designs also noted speed penetra tion day no exception wingeron machines airfoils models using pretty much similar using Eppler 374 modified E-374 now-popular SD-6060 airfoil sections have moderate mean camber line therefore have very modest pitching moment can also penetrate wind need Airfoils like 374 6060 capable performing nice aerobatics pilots skill allows interested wingeron wingevator models suggest contact VS Sailplanes Sig Manufacturing information address VS Sailplanes 723 Broadway East Seattle WA 98102 telephone number 206 860-7711 Sig Manufacturing located Montezuma IA 50171 telephone number 515 623-5154 Cope Retracts now offers what doubt true-to-scale retract available RC scale soaring pilot anywhere world retracts designed built Gene Cope Gene scale RC soaring enthusiast simply could find retractable landing gear accurate enough scale detail satisfy taste Genes answer manufacture own copying design full-scale Kestrel 19 efforts resulted absolutely true scale landing gear accurate detail rugged enough withstand roughest landing 11-pound scale model Cope retract made 4130 steel tubing silver brazed together building jig building gear system jig Gene assures retract will accurate true Thus gear operates smoothly surprisingly little torque Continued page 17S 106 Model Aviation S ON PRO-BOW THIS UNIDUEDEVICEALLOWS YOU TO CUT ACCU RATE WING CORES WITHOUT EXPENSIVE AND COMPLICATED EOUIPMENT WITH THE PRO-BOW THE CUTTING WIRE IS GUIDED DIRECTLY AT THE TEMPLATES BY HAND HELD INSULATOR CLIPS THE HEAVY-DUTY CONSTRUCTION GIVES GOOD FEEL TO THE BOW AND WITH THE ADJUSTABLE HEAT PROBE THE WIRE TEMPERATURE CAN BE CONTROLLED FOR PERFECT CUTTING RESULTS sale $4295 VISA & MASTERCARD ACCEP TEDADD $500 SHIPPING IN USAIL RESIDENTS ADD 7% TAX WING MFG 306 E SIMMONS GALESBURS IL 61401 CALL 309-342-3009 WORKS DIRECTLY OFF OF 12 VOLT BATTERY OR 10 AMP BATTERY ThdGER S COMPLETELY ASSEMBLED STRAIGHT DR TAPERED CORES IAL PASSIVE RESISTANCE CUTTING WIRE LATED STEEL FRAME CUTTING TECHNIDUES & OPERATING INSTRUCTIONS INCLUDED UP TO 41 SEND $500 FOR 60 PAGE CATALOG straight no tendency snap roll drop wing tip 3 slow ground speeds difficult turn model steerable nose wheel individual main gear brakes 4 ABS skin does vibrate excessively regardless engine rpm 5 Theoretically model should fly well 34 pounds hut have yet test theory 6 Elevator trim changes required flaps activated 7 Landings docile 200 400 flaps Forty degrees flap quickly slows plane greatly increases rate descent 8 No control flutter encountered 9 aircraft will spin CG less 20% full control travel CONCLUSIONS project would have successful help encouragement individuals organizations strongly recommend modelers patronize manufacturers distributors mentioned article Further wish thank flight assistantsGus Rebensburg Jerry Reichow Duncan Stewartfor time effort Based test results am now con fident feasible develop full-scale Snipe As am detail-designing big Snipe will continue use -scale model test different features building techniques cant wait get started bending tin summer 1998 Ill let know full-scale aircraft flies leads final question build full-scale model prototype -scale aircraft can enter sanctioned AMA scale contest lope SoaringlByors Continued page 106 required servo fact typical microservo will extend retract landing gear well open landing gear doors Gene has also designed over-center system retractable landing gear landing no force transmitted servo might strip servos gears over-center system also works retracted mode wheels inertia cannot throw gear out open ruggedness retract system surprising Gene has tested gear design doing push-ups install gear builder custom-fits fuselage between two bulkheads installation method serves two purposes First bulkhead mounting provides very rugged attachment inside fuselage gear cannot broken loose landing impact mounting system lets builder adjust depth wheel extension through fuselage Now meticulous scale builder want best retractable gear money can buy Cope retract probably worth considering Gene offers retract two sizes has -scale version currenfly priced $125 Cope also offers supersize -scale retract will handle really big birds tells sometime not-too-distant future will offering -scale model too Cope Retracts can contacted 32031/2 Main St Union Gap WA 98903 telephone number 509 457-9017 modelers friends contacted during month Mr Darrel Johnson Mesa Arizona suggested discuss balance models Well perfectly honest sometimes just mount model atop left right index fingers quick dirty Other times ever procedure bit exacting use balance stand balance stand simple device can built just few minutes aid good old Hot Stuff similar product stand built -inch plywood other plywood approximately size drawing outlines construction shows supporting fillets keep stand breaking large load applied drawing also details round edge stand upon model placed reason use stand quite obvious want obtain balance point model accurately possible stand much easier Using fingers balance model turns procedure somewhat juggling act However can place model stand make weight VIDEO_____ JOY OF FLYING FREE very informative 42 minute VHS video displaying phenomena free flight its variations great PR video can used effectively educate uninitiated art model aviation video professionally produced National Free Flight Society features both indoor outdoor activity available NIFFS 1655 Revere Drive Brookfield WI 53045 * Include Check $2500 plus $300 P&H per tape Buy 4 VgPEOS FREE #17 92 SCALEMASTER CHAMPS STAR MUS PIMA AIR MUS ALABAMA 2 Hrn.$1995 #16 AIRCRAFT GUNTERSYILLE AL AVAL AIR MUS PENSACOLA FL 2 Hn.51996 #1 592 WORLD SCALE CHAMPSAMA INVTL SHOOTOUT W INTL SCALEMASTERS 2 Hn.$1995 #1492 NW SEAPLANE CHAMPS EN SCALE AVIATION IN AUSTRALIA2 Hm.$1995 3 op Gun Invitari oledo Model topo s Air Museum2 Nra. 51996 #12- 91 Scalemasters tao Vegas 91 DSAA Las Vegas 91 NWlntl2 Hre.$1916 C #11 Scalemaster Aircraft Preview Mfg Visdw1tlan Parsons- 91 NWteaplanethamps 2 Kn.S1996 Z#1O 91 Tup Gun W Palm Bch Fl SsA Lao Vegas W Model topu2 Iin.$1996 90 Scalemasters Champs Irving TX hidbey 101 Scalemos5ers an Diego Aerospace Moo 2 Hra.51996 90 NW Intl Scalemasters Farragot Park-Athol ID m Champlin Fighter Museum w/tou Proctor W Seaplane ps Santa Monica Mos Flying 2 Mn. 51995 #7 op Gun Invitational Mesa AZ W Model Eupo2 Hrs.$1995 #6 89 Scalemasters Champs St Louis ake lianaso m Schneider Cop Races2 IIrs.$19gG 89 US NaIls Scale & Seaplanes 89 NW Seaplane Champs Planes Fame taut Moo Moo DshkoshVisit mw/Ralph Beck Chicago Mo Sci & Ind 2 Hs.$1995 #4 09 Top Gon Champo Coral Springs FL tor Albatroo DVA Preview atIs Seaplane Site NW ntl oScalemasters tor N-li Test Flight 2 Hre.S1I96 IA Special Edition Proctor Enterprises Atbatroo OVA Brief Conotr Engine Radio Irrntall& Teat Ftigbto 2 Hra $1996 Cuetias JN4D Jenny Plan FUN SCALE 109 inches 1804 sq 11 lbs 8 sheets w/instroctions 51996 10807 SE STACY CT PORTLAND OR 97266 PHONE 503653-25780 FAX 503 6781342 SEND STAMP FOR COMPLETE LIST PAL & SECAM ORDERS CONCEPTS 17 MILPERA CRESCENT WANTIRNA VIC 3152 AUSTRALIA e 03801-3899 03887-3472 BETA CARLSON ENGINE IMPORTS 814 East Marconi Phoenix AZ 85022-3112 IMPORTED DIESEL ENGINES Worlds Best Selection AE AM Aurora Cipolla D-C KMD MAP Mikro MK MWS Oliver PAW Pfeffer Silver Swallow USE Also Replica Mills MOVO Letmo diesels rare imported glow engines CO motor sets Ten page catalog 1 00 May1993 175 visaBJrn/c ELECTRONICS WE HAVE OVER 26 YEARS EXPERIENCE IN &C AT WE 1466 windward dr mason ohio 45040 ph 513 398-5423 KS METAL Aluminum/Brass/Copper Tubing & Shapes Music Wire 0 Tools Soldering Irons Silk Silk Span Finishing Materials SEND $100 FOR PRICE USIMfI CATALO KS Enginwing 6917 W 59th Street Chicago IL 60638312/5868503 adjustments quite easily Also once balance point suits flying style obtained mark can easily transferred model reference should also pointed out uprights stand three inches wide making wide pounds per square inch exerted balance point bottom wing lowered uprights wide enough small balance points model will sit during balancing process can dent wing Make uprights wide enough reduce pounds per square inch will impart wing obtaining accurate balance point model should consider balancing being performed flying site balance usually accurate unless wind calm case what doing slope inaccuracy occurs because wind pushes model around models nose jumps up down other hand balance calibration shop no air movement can quite accurate type balance provides modeler chance add just right amount weight nose aircraft either teeters balance mark just slightly droops its nose Hope little idea will help get aircraft balanced just right you will discover much pleasurable previously unruly model fly Airfoil month month want share Selig 6063 section section computer generated Michael Selig especially glider fliers have speed running through veins quite thin thickness 706% provides very low profile drag rather telling about would like quote Michael Michaels comments paper sent after 1990 Mid-Columbia Scale Fun-Fly paper titled Three New Airfoils Designed Slope Soaring paper Michael says request several people met past May Tri-Cities Scale Fun Fly have designed three new slope soaring SUNGLASSES 195 100% UV Protection Shatterproof Excellent Optical Quality Tints Fit Over Prescriptions SKYS RO BOX 1000 UMFRIES VA 22026 800-227-9318 airfoils spin-offs 5D6060 common find sariplanes airfoil names like modified E205 E374-9% thinned E374 Certainly slight modifi cation original airfoil will devastate performance modified airfoil will no longer retain favorable characteristics designed original typical modification would scale airfoil y-coordinates some fraction order reduce thickness simple scaling does operate properly airfoil velocity distribution itself derived boundaiy-layer considerations airfoil design process particular airfoil thickness desired requirement best achieved during initial design effort order retain favorable boundary-layer characteristics simultaneously matching thickness specification S6061 9% thick airfoil along lines 104% thick 5D6060 drag predictions made using Drela XFOIL code incompressible version ISES code used aid design SD airfoils presented Soartech #8 Using Princeton airfoil data base found XFOIL code does predict low-Reynolds-number airfoil performance fairly accurately can used compare airfoil designs comparison made constant Reynolds number R0 typically done instead R0 times square root C1 00 Thus Reynolds number varies 1/Square Root C1 C1 decreases R0 increases visa versa can shown such variation R0 follows aircraft flight case Cd plotted corresponds aircraft flight Since constant 125000 aircraft flying C1 ould have R0 00 typical slope soaring aircraft S6061 9% thick section Michael also computer generated compared S6063 7% thick section thinner airfoil produces lower drag Also width low-drag range reduced decreasing thickness Since airfoils intended mainly slope soaring lower limit polar Continued page 180 ZENOAH & OIJ ERCOUPE & J- KITFEN iui ZINGER PROPS CARBON FIBER B&BPRODU DU-BRO GIANT SC 510 ECONITE REIDS 16 MaIn St Phelps NY 145Z 315-548-3779 176 Model Aviation UNE METAL SPECIAUSTS Renogniad Ceflit ledA Aedetset File No____ File Nof Pomer P26226 LR251 64PdOOtS Itto Only certified checks o money orders accepted Minimum otder 614SOfortheepackagesof4 PomerpoleslgdOiperpackage $200 Shipping handlingi CT residents add sales tao Pices suhject change notice DEALER INQUIRIES INVITED furthe information dealer prices send SASE Rosiness Card SERMOS R/C SNAP CONNECTORS Inc Cedar Corners Station Box 16787 Stamford CT 06905 203 322-6294 GATOR TRANSMITEER CASE feather lite GLASS CLOTH 7 az/sq yd weight close weave makes glass cloth easy filling extremely light finished weIght Big 3 sq yd package detailed instructions$895 50FF-N-SAFE MOUNTS new type engine soft mount using special ribbed Iso-damp grommela Engine always safely retained Vesy effective vibration reduction dramatic decrease engine shake Available vely light machined alum beam mount 60 2/strokes 120 4/strokes Also available alum plate radial mount 60 2/strokes Soft-N-SaIe 120 beam mount complete.S2995 5SoftN Safe 60 beam mounl complete..S2495 5SoftNSafe 60 radial mount complete.S129S Replacement grommets 120 mount.A/495 *Replacesnent grommeta 60 mount 4/295 RADIAL ISO-MOUNTS Conventional plate type mount using four Lord/type 60 Duro Iso-mounts Optimized lowest vibration transmission airframe reduced engine shake 60 Radial Iso-mount complete mount..S1495 5Isomotiits Pkg four 995 5/8 dia x 1/2 long 8-32 female end 832 x 1/2 male other end 60 Duro rubber RC Slope SoaringlByers Continued page 176 held fixed near C1 approximately equal 00 upper limit dictated indi rectly airfoil thickness requirements What think Maybe should give S-6063 try some really hot straight line passes Yeah yeah know careful Thanks again reading column Please pass along ideas adventures shared rest slope soaring community urationlMurphy Continued page 108 afford added weight on-off toggle switch DT-fuse-actuated microswitch keep power off until model DTed added weight easily compensated removing weight elsewhere model such lighter wheels lighter batteries lighter coil other such belttightening steps Since SAM-legal model must weigh mimmum 263 ounces anyway added weight provided littleif anyhandicap model performance Remember what said beginning Systems selection will also depend intended application Some may question DT-actuated devices mere battery savers sacrificing use flyaway situations DT fails function suppose could argue 10 miles off course well out sight model couldnt hear device operating worst out cost model plus small amount have invested system Conversely 10 miles off course out sight model carrying $125 electronic transmitters chances going get back via model-finder system either Thus out additional $125 rather 10 spot Well much what-if scenarios about enough verbiage model finders session will cut off until review another system two next F send *100 illustratsd catalogue 0warbirds 39 inch span 70pawered slope gliders sliders 1930s Telephone 714 77541530sailboats trio macas PO BOX 1249 MINSTER CA 92684-1249 time Remember columnist welcomes information effective system available modelerswhether commercial cottage industry brainstorm sourcesthat would justify review series reports Keep cards letters coming folks thank ye kindly New publications catalogs Terry Rimerts Fly-By-Night Press has issued its third plan book Nostalgia Gas designs aptly named Third Nostalgia book contains reduced-size plans designs era accent 1/2A designs such Kiwi Frank Garcher s Midwest Fortastrop Samuelson s Half Wild Goose AJ Phillipss Yo-Ho Mahieus 1/2A Zeek Zigenfuse Pogo Russ Hansens T Bird /2A Sobala Geef Sal Taibis Spacer others Some larger models also included like Ed Howes classic Stare designed 29-35 displacement engines Denny Daviss Ultra Hogan some dated British designs peruse well including Y-Bar Creep Eliminator have thought would great benefit catalog three-views reduced plan drawings published kitted designs could made available serve reference guide well just plain entertainment looks Terry getting us slowly surely third volume NosGas designs Terry advises source issue first two volumes Lee Campbell Campbells Custom Kits price $10 plus $2 postage Book Nostalgia $8 Nostalgia Too $10 course add appropriate postage volumes well Lees address 401 Executive Center Dr Suite H-lOS West Palm Beach FL 33401 Tell em Duration sent British equivalent annual NFFS Symposium Free Flight Forum published BMFA British Model Flying Association 1992 edition available Martin Dilly 20 Links Rd West Wickam Kent BR4 OQW England 830 pounds Payment should check payable BMFA Free Flight Team Travel Fund equivalent pounds sterling drawn PRODUCTS FOR ThE DISCERNING MODELER Complete Line Exhaust Systems d Pipes5 Muffled Tuned Pipes Headers uri Mufflers Expansion Mufflers copter Ball Mufflers ialized Exhaust Systems Unsurpass Model Aviation dy high-density molded plastic 5Cushions impact resists weather 5Strong double hinges durable latch 5Convol foam liner Oreat storing spare transmitters New low price..$l495 Include $350/Item S&HdlaL Residents Add 6% Tax GATOR R/C PRODUCTS INC 3713 Pompano Dr Pensacola FL 32514 Phone 904 494-0203 904 494-0207