INTERNATIONAL Soaring RC Scale Fun Fly 1990 edition exciting fun fly TnCities WA has slated May 25-27 years fun fly will best yet number activities planned Besides having opportu nity fly ot best slopes country some hangar-flying other Scale en thusiasts heres what have look forward years event Friday night Slope Soaring News will sponsoring catered Washington wine tasting social evening Saturdays docket will include banquet din ner followed guest speaker Michael Selig manufacturer-supported raffle Selig Donovan wind tunnel tests completed re cently Michael will discussing some important interesting findings raffle annual event has become almost leg endary having large numbers quality prizes such manufacturers Airironics JR Ra dios Sig Beemer RC West American Sail plane Designs Pre-registration required event include yourself fun 1990 fun fly contact Tn-City Soarers 632 Meadows Dr E Richland WA 99352 tel either 1-509/6275224 1-509/525-7066 Flying buddies Ever get feeling plane king hill know slope top bottom Slope ship has hours its extension self Well maybe after reading piece Charlie Morey Slope Soaring News youll put back place much better Theyd fly apartgoing far out toward distant hori zon roust some pigeons phone line send gull scurrying cover beach belowthen charge back over ridge cavort together lift Generally ignored brightly colored Gliders sharing airspace few natural colored planes got attention among gray Cliff Hangar Models F-20 40 Model Aviation Radio Conoi Slope Soaring Mark Triebes 20794 Kreisler Ct Saratoga CA 95070 uoug nerizog snows nis iinouene ana aigger Drainer inc uuIcKsIIver ibis months column looks Silhouette ideal Sailplane small slopes bluffs Hertzog photo Silhouette lightweight agile Slope ship Build light skill itll stay up floaters Lean it will really take off Construction Silhouette very sim ple glass fuselage available serious Sloper Doug Hertzog photo two themperegrine falcons darting diving together over oceanside cliff Point Fermin Only Bennie seemed know much about said must mates since falcons same sex arent partic ularly friendly toward another two seemed enjoy flying much Navy Tom Staggs Aldebaran fly ing wing Despite garnering reputation mad scientist Tom continues experiment variety unique designs major ity being flying wings Photo Tom Staggs Beta Rigel high-speed delta wing Whats wrong plane Apparently Note model rocket engine used Marlah doesnt like fly high-altitude rocket-assisted takeoffs RATO idea sites Dave Kurth takes look prob number Slopers have kicked around lems encountered Mariah Toms first author has seen What enlightens us own unique solu expect Jet pilot Staggs photo tions adapting Glider high altitude Perhaps looked like lunch trespassing bird prey needed inspected sent its way heavy little F-20 no slouch Ill tell right now no match fastest bird world peregrines took interest cruised over just hammerheaded through 100-ft stall turn locked just about foot above tail Okay thought Lets see what comes next put F-20 steep dive bird held its distance exactly tucking its wings slightly match terminal velocity dive Tracking model Jet kid stuff predator snatches its live fast highly-motivatednot-to-become-meals quarry Out air day bottom dive pulled up steep climb No problem falcon extended its wing tips slightly drawn along visible string maintained its 12-in distance Lets see can split-S thought rolled F-20 inverted falcon backed off slightly sizing up situation plane screamed through its downward arc too rolled reattached himself just behind tail little hawk much faster quicker turn ing Glider F-20 tasty would have lunch heard Benriie chuckling behind Hes got servo feather said laughing anxious see what falcon would nexthopefully short snatching Out sky powerful talonsbut appar ently become bored pace flick amazing wings gone search better sport leaving play breeze other earthbound amateurs Anyone has opportunity fly real thing can relate Charlies story Nothing can match grace power skill birds Charlie puts well Going wing-tip-to-wing-tip guys will remind youre nothin pigeon sky Slope Racing tips contest season rap idly approaching heres article will give novice Racers few helpful suggestions will remind expert Racers few basics may have forgotten over time article written Pat Chewning appeared newsletter Portland Area Sailplane Society Dive wind am reminded situa tion occurred Slope Races spring wind exactly perpendicular course made downwind leg very quick upwind leg very slow especially noticeable slower airplanes started think about deal wind like gain best speed through course way visualize problem re alize altitude fuel source want gain fastest speed through course run Out fuel altitude figured would want alter speed leg diving increasing speed upwind leg uses alti tude decreases time spend fighting wind Alternatively would want pull up somewhat downwind leg conserving alti tude spending time wind aid ing course speed developed equation time takes cover distance upwind downwind given windspeed dive angle flying speed developed another equation alti Continued page 143 PILOT GLASSES. HOW VALUABLE IS YOUR EYESIGHT Adjustable side frames free-flaw ventilation Extremely light weight added comfort Blocks harmful " ultraviolet radiation Attractive case included Wraparound frame fits comfortably over prescription glasses tz mist coated far scratch resistance Made entirely Polycarbonate far impact protection ANSI Z871 specifications Available in Clear shop work $1325 Amber overcast days & late afternoons $14~ Gray S14~ & Mirror S19~ sunny days CA Mask $15~ Paint Mask S2O~ member club hit prop blade thrown 60 engine close range tip blade struck Safety Plus glasses saved him serious injury possibly loss eye incident convinced everyone should wear safety glasses near model airplane engines being run upEd Saul Prices include shipping handtingSecretary Treasurer ____________Pikes Peak RC Club FLIEJ5 See hobby dealer first doesnt have what need order direct SAFETY PLUS PO Box 1173 Dept iM Clinton MS 39056 ORDERS ONLY 1-800-842-7233 Cont USI Mississippi 6011924-9640 VISA/MO February 1990 41 SUCKER-KIT$5995 Show & Tell Video . $3995 Add $400 Shipping & handling Ml residents add 4% sales lax 4-5 3100 SASE product list 4 ssamples real wind veneer skins Product List locludes Napless Arrow t Hinges Carbon Tow Mylar Sheet E hTech items 0 Dealer Inquires Welcome ND CHECK OR MONEY ORDER TO PO Box 866 5 OC Lapeer Ml 48446 313 664-3330 composite Aircraft Eng & Supply FAX 664-9780 WILLIAMS ACCESSORIES BROTHERS 4 PILOTS STANDARD TSMAN RACING TARY WHEELS AGE TH CONTOUR BALLOON EN AGE 4 ENGINES PRATT & WHITNEY HT HONE ICKER5 DAU EELLb Radio Technique/Myers Continued page 37 ducts electricity know Think about lead/acid battery car little bit sul phuric acid conducts lot electricity Solar flares nuclear explosions sun emit radio waves goes time atmosphere magnetic field earth protect us effects People Alaska see effects northern lights auro ra borealis Darrel Kline AMA 84898 Out Everett WA sent clipping remind II years solar flare activity sun reaches peak According NOAA National Ocean ographic Atmospheric Administration solar flare activity will peak 1991 can expect will interference complaints sorts RCers 1991 because AMA will sanction use 60 RC channels aircraft Therefore frequency spacing between RC transmitters use will 20 kHz instead 40 kHz tween RC systems now Part complaints will come people clinging outmoded wideband equipment Other complaints will traceable interference commercial transmitters have since 1983 10 kHz away RC channels Whats left may traceable solar flare emis sions may notice glitches People watching TV channels TV2 TV4 TV5 will see ing snowy pictures loss color wavelike interferences crawling over screen what worth could take portable TV field use monitor see above disturbances screen might serve warning fly Scale model have spent year decorating RC channels located frequencywise between broadcast TV channels TV4 TV5 should confused cable chan nels 4 5 Cable TV will affected occasional black outs during year solar flares RC Slope Soaring/Triebes Continued page 41 tude used up given dive angle flying speed Unfortunately have missing equation flying speed function dive angle know increases dive angle assume must determined empirically experiment something can simply calculate So dont have fancy equation prove hypothesis sure seems reasonable Use prestart flight time typical Slope Race period flight time prior start Race often wasted Most people know enough use time gain alti tude Race other uses Fly plane along slope find location best lift could well beyond ends course want spend time gaining altitude lift will also vary distance away face slopefind lift best various alti tudes may notice best lift close hill low altitudes farther hill higher altitudes Use time increase distance hill staying wind flying constantly angled wind stay course follows can gain some dis tance wind can decrease crab angle during Race gain faster time drifting back toward slope wind Great observation hint MT Use prestart time trim aircraft fast flight find much better have air plane trimmed too much down-trim too little way might have put some upstick control speed during race wont have use down-stick less comfortable much less natural Get good start good start Race gives obvious physical advantage real mental boost carries through rest Race As countdown approaches start aircraft should have plenty altitude should well away slope upwind should flying generous amount up-stick conserve altitude com pensate down-trim needed Rac ing approximately 10-second mark plane should crossing starting line op posite direction reference point judging begin run fivesecond mark initiate 1800 turn towards start line turn will cost some time youll make up diving toward start line creasing speed dive should initiated releasing up-stick youve held during altitude-gaining prestart plane will naturally gain speed toward start have seen too pilots waste valuable altitude making enormous dives start gaining tremendous speed burns off about halfway through first leg course Youll want drop Continued page 146 February 1990 143 enough get plane speed will lose one-tenth altitude lap assuming 10-lap speed run want plane cross start just after its announced can adjust timing flying away slope youre too early diving slightly too late better two seconds late start rather early have recross start line judge carefully Turning quality turns greatly af fects time through course AMA task S2 Racing multiple-plane Pylon Racing quality flagger caller have great impact ability make turn proper time Trying anticipate flag usually results missing turn eats up much time can gain correctly antici pating other turns advice anticipate turns early Race prepared turn flagup signal nothing until turn actually called airplane slightly ahead you can use signal anticipate own turn ahead Race should risk missed turn flagger caller consistent last two turns can antic ipated slightly judging time between flag-up turn signal Use ohitude Try adjust angle dive end up proper altitude end Race have found best try adjust trim during Race adjust altitude using either climbing diving turns significant wind component parallel course use climbing turn upwind leg diving turn downwind leg will allow wind help shorten turn upwind side will minimize overshoot downwind side Sometimes obvious slot good air just below top slope has great lift minimal crosswind will have found slot good air during prestart flying should use altitude first few laps speed through course get down slot finish remember nothing magical about top slope might well dive well below final leg fastest finish Fixing Mariah number years ago de signed small aerobatic Slope ship called Mariah appeared construction article pages MA June 1988 issue plan //588 P. 5h.tdg 1/4 Scale Kits $12995 Epoxy/Glass/Foam Construction Drawings Data Formula 120 Pylon Sport Standoff ScaleKit Price ping Credit Cards WelcomedOhio Residents Add 7% since time people have built Sailplane variety results such builder Dave Kurth wrote follow ing article journal Pikes Peak Soar ing Society Spoiler number us club purchased wood build small Sailplane designed Mark Triebes called Mariah plane sup posed fast aerobatic needed light breeze fly few people actually built flew Mariah Last October maiden flight since plane has caused nothing problems As result peo ple did finish building have given up Well may reason start up again first problem severe roll rates due short thin wings ailerons being too sensi tive So made aileron throw very small next problem keeping air took hur ricane-force winds provide sufficient lift problem helped moving center-ofgravity back some distance Being nose-heavy re sulted altitude loss turn Barry made bigger wings lower wing loading helped lot used Sel ig 3021 airfoil stretched wing out 277 made leading edge parallel trailing edge using root rib shape way out tip kept fully sheeted wing added Quabeck tip Since ribs same very easy make result wing about twice area other problem still persisted plane could loop both Barrys Halfway around loop plane would just quit flying tumble aimlessly theory tail too close wings steep angle attack during loop air flowing over wing hitting tail turbulent some way nor mal resulted elevator losing airflow plane losing control conclusion make fuselage longer dis turbed airflow would settle down time met elevator April Slope-bash contest flew Mariab bigger wings crashed first lap totally due error Since crash left fuselage two pieces decided make longer question long no idea decided make educated guess Mark Triebes says plane flies great sea level figured calculate fuse lage length difference between 7000 ft sea level air pressure 7000 ft about 75% sea level So measured fuselage divided 075 decided tail should four inches further back plans specify 146 Model Aviation RC Slope Soaring/Triebes Continued page 143 JjjjJg~jajr2u i ~ WE ARE SHOOTING DOWN HIGH BALSA PRICES WITH SUPER QUALITY Satisfaction Guaranteed Direct Only BALSA SHEETS36 41 30 SALSA SliCKS 3641 1162331161425 3322401 16 3813 182431161214 316244332 1410 4 254332 3812 1 32331332 1216 12033118 1808 116331 49 3119 141116 332344 58 3716 381218 18 35471 4518 121024 31636282 553163161116 14 323 95 61316 381720 516380110316 122230 36 38/6124 7114 141624 12 3 110155I 4 381526 34316019114122130 116454 76 4814343444 332470 94 5614 14055 18 490106 665165162128 316443122 7536 392/37 144114134 8439123246 38 4160225 13936 344255 2 422/26136 15270 12123653 MATCHED SHEETS12 344662 33241001215878 13410859594995 3 6 42034 346790 443 BALSA HOT LINE Call 806 745 6394 10am 6pm Central Time BALSA TRIANQL ES 36 25 9630 35 45 55 BALSA PLANKS 36 90 25 329 4293 11/23302 1 1/2,4396 242231 243335 244476 343515 344716 TAPERED SHEETS36 14265 14395 364268 38346 123120 LONE STAR EPOXY 904L,l.8 35 Sooo598 15,,599 3oooo596 LIGHT 4-6 LB WOOD36 1/32362 1/204362 1/16362 3/32374 1/8381 3/163105 1/443125 3/83160 1/23190 3/443300 143425 1/16498 3/3244118 1/844135 3/1644167 1/444188 3/644285 1/24385 TRAIL INC EDGE 36 14132 51611439 3811246 12270 INSTANT CL UE 1 0 Thck298 1 o 75,296 2, Thck 550 2o /6 556 BASSWOOD41 3/1631626 3/161430 3/163/938 3/161246 3/163460 141442 14 3849 143460 363660 361230 3/63490 121290 1234100 BUNDLE DEALS 20116336 699 20116436 1035 20-332 336 865 15332 436 955 161/6336735 101/6436695 15316336 920 10316436 835 1014336 655 1014436 930 1036336670 53/6 650 51/2336540 51/24361060 10332446 885 518446 500 5316448 600 514 446 645 _________ I * NEW * Hundreds 0 new sizes accessories tinishing materials Send #10 SASE latest catalog SPRUCE STICKS 3641 18181725 18142026 183/62232 3163162638 1/4 143450 1/4 3/840 55 144 12 45 65 3/8 384969 3/812 60 77 1/24 1/26686 12347597 SPRUCE TRIANGLES 36 3/93/647 121264 344 34 LITEPLY48 15x6 18 x 12 14 s6 14612 LONE STAR MODELS cone Handling Charge pay UPS Add $300 COD *400 extra PP APO FPO 1623 57th St Lubbock TX 79412 States accept Visa Mastercard peosonal checks COD65% tax Texas US currency Minimum Wood Order $1000 6Yen HARD MAPLE 1 4438 38 3/8 3612 3834 1 2 42 45 50 56 66 BIRCH 00 WELS36 19 05 316 14 516 38 11 14 2S 32 left fuselage identical plans tween nose rear access hatch F-4 formery point added extra four inches left old F-4 former cause still intact rear made new F 2 F-3 F-4 formers redesigned lengthened fuselage wing located same place tile fuselage same angle incidence ignored extra height fu selage around wing also reinforced fuse lage leading edge wing meets side After getting far add about 06 oz nose get CG 22% old plane bigger wings needed tail weight test flight Sunday August 6 wind I/he north 10 20 mph flew bowl tt3e north side hill road going top hill located al ready plane trimmed gave toss able maintain altitude little diffi culty did have give little down-trim get plane go forward over hill got used flying just doing S-turns noticed ailerons now seemed have too little control cant explain oneit may head After getting comfort able amount altitude attempted loop No problem tried tight loops slow loops no surprises flew inverted few sec onds determined sufficient stick movement actually get plane climb inverted plane no trouble verted got too nervous somehow got right-side-up again problem couldnt snap roll because isnt enough throw ailerons should easy fix So appears four inches fu selage will fix looping problem bigger wings also help although seems plane flies slower will take some flights see performance can improved least last major problem has solved Its just coincidence majority Slopers live fly California coast smooth dense air allows us get away some things cant quite manage say 7000 ft initially designed Man ah no intention being purely sealevel ship because 99% flying California characteristic obviously found its way design have heard quite few people built Mariah no problems stall Slop ers located coast Im glad see Dave didnt give up Mariah able adapt design meet particular flying conditions develop unique personal plane lesson learned bet planes suited fliers small modifications can make otherwise unsuitable design perfect style flying great aspects sport opportunity ex periment something should limited just designers Silhouette Paralleling growth Slope Soaring has development number small model companies feature Slope Glider kits companies Douglas Aircraft back received letter owner operator Douglas Aircraft Doug Hertzog Doug provided some information Slope de signs since time have opportu nity build fly first design Sil houette Silhouette spans 43 uses modified Eppler 374 airfoil wing loading right around 10 oz/sq ft Silhouette ideal slope plane requires two-channel radio mini micro equipment kit includes machine-cut plywood balsa parts foam core wings plans instructions com plete hardware package what Doug has say about Sil houette Silhouette aerobatic Slope Glider de signed specifically speed energy retention maneuverability ship displays very clean handling characteristics both upside-down right-side-up capable outside well inside maneuvers limited imagi nation Its simple fuselage construction balsa-sheeted foam core wing provide less experienced modeler opportunity build superior aircraft minimum ef fort' its small size light weight Sil houette does need lot wind fly right conditions blast fly winds blowing 15 20 mph ifs just begin ning get fun zone small size Silhouette makes ideal smaller slopes bluffs lucky enough have access large slope may find Sil houette just what looking big brother Silhouette Quick silver Doug says Quicksilver due re leased near first year should available time read Quick silver employs modified 8% thickness root Selig 6060 airfoil will easily house fullsized radios 500-mAb battery youd like try out planes yourself check local hobby shop contact February 1990 147 CUSTOM CUT CONTEST BALSA Sheets Piece ed Close Tolerances AAA Grade Dried ped 100% a serious modeler want performance must try 4-6 lb balsa 3 PLYBIRCH 48 1164x12835 132s12475 1I16x12475 118x12496 S FY3WH 48 3132x12700 1/8x12775 3116x12625 114x12625 318x12725 61 1/2x12900 GROG VEDLG MOUNTS 13 Inches 1753834/1940 3503834532140 275I 234/316/45 550 THIRTY-SIXTH ANNUAL RADIO CONTROL EXPOSITION APRIL 6 7 8 1990 FRIDAY9amto6pm SATURDAY9amto6pm SUNDAY9amto43Opm TOLEDO SPORTS ARENA ONE MAIN STREET TOLEDO OHIO TICKETS can purchased door ADVANCE sending self-addressed stamped business size 41/sx91/s envelope TICKETS 38235 Castle Romulus Ml 48174 orders above 10 tickets must include double postage US orders must include 25 cents per order handling charge foreign orders must include 50 cents per order handling charge need send addressed envelope will provide necessary postage NOTE Registered Express Type Mail Orders Will Acceptedll Include check money order US funds made payable Weak Signals R/C Club Ticket prices $400 per day foradultsandSlOOperdayforchildren 12 under Please specify number Deadline ticket orders March 30 1990 sales final non-refundable Hotel info map area may obtained sending stamped self-addressed envelope ticket address above Any other Exposition information avail able contacting Wayne Yeager co director ticket address phone 313 941-6661 Will Have TraditionalSwap Shop Saturday Night Auction COMPETITION CLASSES NON-MILITARY SPORT SCALE PLANE AMA Rules MILITARY SPORT SCALE PLANE AMA Rules PRECISION SCALE PLANE AMA Rules PATTERN PLANE No Jets SPORT MONO-PLANE non-scale models SPORT BI-PLANE non-scale models OLD TIMER FREE FLIGHT R/C ASSIST R/C SAILPLANE non-scale models No Engines HELICOPTER R/C CAR COMPETITION BOAT MILITARY SCALE BOAT PLEASURE POWER BOAT WORKING VESSEL-UNARMED presented Weak Signals R/C Club Toledo Ohio ma maicnea -errormance ystem TOP PERFORMANCE K&B ENGINES MrrlaieMaine K&B FUELS K&B GLOW PLUGS 9 Blends4 Choices Matched Finish System BEST APPEARANCE K&B FIBERGLASS CLOTH K&B Micro-Balloons FILLER K&B SUPER FOXY RESIN K&B SUPER FOXY THINNER K&B SUPER FOXY PRIMER K&B SUPER FOXY PAINT K&B MIXING CUPS Doug directly Douglas Aircraft PO Box 92472 Long Beach CA 90809 phone 1213/498-1737 Mad scientists like tinkering unique innovative designs have developed mad scientist reputation other fliers youre alone have faced kind treatment throughout modeling career have others such experimenter Navy Lt Tom Staggs received fantastic letter Tom detailing work has done fly ing wings Having mechanical engineer ing major college currently flying EA-6Bs Navy Tom has practical knowledge ability come up some very unique interesting ideas fellow mad scientist especially flying wings Tom would like trade ideas failures successes like Heres address Lt Tom Staggs VAQ 129 E/W NAS Whidbey Island Oak Harbor WA 98278-6100 RC Electrics/Kopski Continued page 43 Amptique much better respect kit lacks detailed construction/instruction manual choose go very fineflying models have little no previous build ing experience sure can get some experi enced help construction before start easiest build beginners seem Electra Mirage PT Electric Unlike first planes have extensive highly de tailed highly illustrated instruction booklets such good beginning builders aver age models have generally heavier wing loadings thus fly somewhat fasterbut still make pretty good basic trainers folks think fair say fly easily less easily first three ElectriCUB also falls category being semiscale has others ElectriCUB does fly beautifully trainerslow stable forgivingits too pretty purpose What mean CUB has scale details because somewhat complicated fragile reacts less better bumps often associated training recommend next plane models listed Electra differs its Glider also largest model listed Some folks like idea Sailplane would good choice plane best bunch carrying conventional radiosie standard-size servos turn printer airfoil plotter with.. FOILED AGAIN! llljj AIRFOtLS tN ANY CHORD UP TO 24 INCHES o MODIFY THtCKNESS CAMBER & TRAILING EDGE PLOT SKIN THICKNESS FOR SHEETED WINGS o ENTER DATA EASILY VIA INTELLIGENT EDITOR USER-FRIENDLY MENU-DRIVEN OPERATION INCLUDES 18-PAGE ILLUSTRATED USER MANUAL $3995 as onkn plea ,rios aeaeaioeal bask 8n4fas US$50 npa,ad - pleas asepn& pasasn 1, S,d h,k o,,n .le CYGNET Software 24843 Del Prado #141b Dana Point CA 92629 opposed microservos 500-mAh receiver bat tery packs large receivers excels because its large wing area case always rec ommend using micro-sized radio systems planes excess weight saved about five eight ounces definitely shows up better flight performance lighter model slower can made flya worthy goal beginners Also lighter model longer flight time per charge something else very worthwhile some other trainer models mar ket such Midwest Aero-Lectric Guillow Aeronca Ive included because Ive no personal experience some other Electric kits definitely basic trainers include ElectraStreak Electric Hots Skyvolt Micro Racer Etude Race Rat Wasp name some Now back good instructor get quite few letters wherein guys local club wont help new guy Electric seem several reasons given unfamiliarity motors batteries some earlier bad im pression experience fear Electric con viction Electric dont fly kid perhaps macho trip power club run let offer thought two suggestions thought Chances group rejected didnt have good structor club roster anyway sugges tions See can find someone locally likes experienced Sailplanes OTs lack Electric experience chances theyll good job checking out plane getting air 2 Go back beginning column read about Elec tric Connection service Someday future common reaction local field will some thing like dont fly greasy noisy kid stuff fella' So have thoughts offerings instructors trainers general some Elec tric trainers particular Now some wont have write letters about thats help well Thrust measurements propeller pull seem interest Electric modelers get couple letters year readers se riously pursuit thrust study topic par ticular Ive received several lengthy detailed let ters numerous photographs thrust measure ment data collected homemade test setups readers over country have say some test setup fixtures down right impressive 148 Model Aviation h p
Edition: Model Aviation - 1990/02
Page Numbers: 40, 41, 143, 146, 147, 148
INTERNATIONAL Soaring RC Scale Fun Fly 1990 edition exciting fun fly TnCities WA has slated May 25-27 years fun fly will best yet number activities planned Besides having opportu nity fly ot best slopes country some hangar-flying other Scale en thusiasts heres what have look forward years event Friday night Slope Soaring News will sponsoring catered Washington wine tasting social evening Saturdays docket will include banquet din ner followed guest speaker Michael Selig manufacturer-supported raffle Selig Donovan wind tunnel tests completed re cently Michael will discussing some important interesting findings raffle annual event has become almost leg endary having large numbers quality prizes such manufacturers Airironics JR Ra dios Sig Beemer RC West American Sail plane Designs Pre-registration required event include yourself fun 1990 fun fly contact Tn-City Soarers 632 Meadows Dr E Richland WA 99352 tel either 1-509/6275224 1-509/525-7066 Flying buddies Ever get feeling plane king hill know slope top bottom Slope ship has hours its extension self Well maybe after reading piece Charlie Morey Slope Soaring News youll put back place much better Theyd fly apartgoing far out toward distant hori zon roust some pigeons phone line send gull scurrying cover beach belowthen charge back over ridge cavort together lift Generally ignored brightly colored Gliders sharing airspace few natural colored planes got attention among gray Cliff Hangar Models F-20 40 Model Aviation Radio Conoi Slope Soaring Mark Triebes 20794 Kreisler Ct Saratoga CA 95070 uoug nerizog snows nis iinouene ana aigger Drainer inc uuIcKsIIver ibis months column looks Silhouette ideal Sailplane small slopes bluffs Hertzog photo Silhouette lightweight agile Slope ship Build light skill itll stay up floaters Lean it will really take off Construction Silhouette very sim ple glass fuselage available serious Sloper Doug Hertzog photo two themperegrine falcons darting diving together over oceanside cliff Point Fermin Only Bennie seemed know much about said must mates since falcons same sex arent partic ularly friendly toward another two seemed enjoy flying much Navy Tom Staggs Aldebaran fly ing wing Despite garnering reputation mad scientist Tom continues experiment variety unique designs major ity being flying wings Photo Tom Staggs Beta Rigel high-speed delta wing Whats wrong plane Apparently Note model rocket engine used Marlah doesnt like fly high-altitude rocket-assisted takeoffs RATO idea sites Dave Kurth takes look prob number Slopers have kicked around lems encountered Mariah Toms first author has seen What enlightens us own unique solu expect Jet pilot Staggs photo tions adapting Glider high altitude Perhaps looked like lunch trespassing bird prey needed inspected sent its way heavy little F-20 no slouch Ill tell right now no match fastest bird world peregrines took interest cruised over just hammerheaded through 100-ft stall turn locked just about foot above tail Okay thought Lets see what comes next put F-20 steep dive bird held its distance exactly tucking its wings slightly match terminal velocity dive Tracking model Jet kid stuff predator snatches its live fast highly-motivatednot-to-become-meals quarry Out air day bottom dive pulled up steep climb No problem falcon extended its wing tips slightly drawn along visible string maintained its 12-in distance Lets see can split-S thought rolled F-20 inverted falcon backed off slightly sizing up situation plane screamed through its downward arc too rolled reattached himself just behind tail little hawk much faster quicker turn ing Glider F-20 tasty would have lunch heard Benriie chuckling behind Hes got servo feather said laughing anxious see what falcon would nexthopefully short snatching Out sky powerful talonsbut appar ently become bored pace flick amazing wings gone search better sport leaving play breeze other earthbound amateurs Anyone has opportunity fly real thing can relate Charlies story Nothing can match grace power skill birds Charlie puts well Going wing-tip-to-wing-tip guys will remind youre nothin pigeon sky Slope Racing tips contest season rap idly approaching heres article will give novice Racers few helpful suggestions will remind expert Racers few basics may have forgotten over time article written Pat Chewning appeared newsletter Portland Area Sailplane Society Dive wind am reminded situa tion occurred Slope Races spring wind exactly perpendicular course made downwind leg very quick upwind leg very slow especially noticeable slower airplanes started think about deal wind like gain best speed through course way visualize problem re alize altitude fuel source want gain fastest speed through course run Out fuel altitude figured would want alter speed leg diving increasing speed upwind leg uses alti tude decreases time spend fighting wind Alternatively would want pull up somewhat downwind leg conserving alti tude spending time wind aid ing course speed developed equation time takes cover distance upwind downwind given windspeed dive angle flying speed developed another equation alti Continued page 143 PILOT GLASSES. HOW VALUABLE IS YOUR EYESIGHT Adjustable side frames free-flaw ventilation Extremely light weight added comfort Blocks harmful " ultraviolet radiation Attractive case included Wraparound frame fits comfortably over prescription glasses tz mist coated far scratch resistance Made entirely Polycarbonate far impact protection ANSI Z871 specifications Available in Clear shop work $1325 Amber overcast days & late afternoons $14~ Gray S14~ & Mirror S19~ sunny days CA Mask $15~ Paint Mask S2O~ member club hit prop blade thrown 60 engine close range tip blade struck Safety Plus glasses saved him serious injury possibly loss eye incident convinced everyone should wear safety glasses near model airplane engines being run upEd Saul Prices include shipping handtingSecretary Treasurer ____________Pikes Peak RC Club FLIEJ5 See hobby dealer first doesnt have what need order direct SAFETY PLUS PO Box 1173 Dept iM Clinton MS 39056 ORDERS ONLY 1-800-842-7233 Cont USI Mississippi 6011924-9640 VISA/MO February 1990 41 SUCKER-KIT$5995 Show & Tell Video . $3995 Add $400 Shipping & handling Ml residents add 4% sales lax 4-5 3100 SASE product list 4 ssamples real wind veneer skins Product List locludes Napless Arrow t Hinges Carbon Tow Mylar Sheet E hTech items 0 Dealer Inquires Welcome ND CHECK OR MONEY ORDER TO PO Box 866 5 OC Lapeer Ml 48446 313 664-3330 composite Aircraft Eng & Supply FAX 664-9780 WILLIAMS ACCESSORIES BROTHERS 4 PILOTS STANDARD TSMAN RACING TARY WHEELS AGE TH CONTOUR BALLOON EN AGE 4 ENGINES PRATT & WHITNEY HT HONE ICKER5 DAU EELLb Radio Technique/Myers Continued page 37 ducts electricity know Think about lead/acid battery car little bit sul phuric acid conducts lot electricity Solar flares nuclear explosions sun emit radio waves goes time atmosphere magnetic field earth protect us effects People Alaska see effects northern lights auro ra borealis Darrel Kline AMA 84898 Out Everett WA sent clipping remind II years solar flare activity sun reaches peak According NOAA National Ocean ographic Atmospheric Administration solar flare activity will peak 1991 can expect will interference complaints sorts RCers 1991 because AMA will sanction use 60 RC channels aircraft Therefore frequency spacing between RC transmitters use will 20 kHz instead 40 kHz tween RC systems now Part complaints will come people clinging outmoded wideband equipment Other complaints will traceable interference commercial transmitters have since 1983 10 kHz away RC channels Whats left may traceable solar flare emis sions may notice glitches People watching TV channels TV2 TV4 TV5 will see ing snowy pictures loss color wavelike interferences crawling over screen what worth could take portable TV field use monitor see above disturbances screen might serve warning fly Scale model have spent year decorating RC channels located frequencywise between broadcast TV channels TV4 TV5 should confused cable chan nels 4 5 Cable TV will affected occasional black outs during year solar flares RC Slope Soaring/Triebes Continued page 41 tude used up given dive angle flying speed Unfortunately have missing equation flying speed function dive angle know increases dive angle assume must determined empirically experiment something can simply calculate So dont have fancy equation prove hypothesis sure seems reasonable Use prestart flight time typical Slope Race period flight time prior start Race often wasted Most people know enough use time gain alti tude Race other uses Fly plane along slope find location best lift could well beyond ends course want spend time gaining altitude lift will also vary distance away face slopefind lift best various alti tudes may notice best lift close hill low altitudes farther hill higher altitudes Use time increase distance hill staying wind flying constantly angled wind stay course follows can gain some dis tance wind can decrease crab angle during Race gain faster time drifting back toward slope wind Great observation hint MT Use prestart time trim aircraft fast flight find much better have air plane trimmed too much down-trim too little way might have put some upstick control speed during race wont have use down-stick less comfortable much less natural Get good start good start Race gives obvious physical advantage real mental boost carries through rest Race As countdown approaches start aircraft should have plenty altitude should well away slope upwind should flying generous amount up-stick conserve altitude com pensate down-trim needed Rac ing approximately 10-second mark plane should crossing starting line op posite direction reference point judging begin run fivesecond mark initiate 1800 turn towards start line turn will cost some time youll make up diving toward start line creasing speed dive should initiated releasing up-stick youve held during altitude-gaining prestart plane will naturally gain speed toward start have seen too pilots waste valuable altitude making enormous dives start gaining tremendous speed burns off about halfway through first leg course Youll want drop Continued page 146 February 1990 143 enough get plane speed will lose one-tenth altitude lap assuming 10-lap speed run want plane cross start just after its announced can adjust timing flying away slope youre too early diving slightly too late better two seconds late start rather early have recross start line judge carefully Turning quality turns greatly af fects time through course AMA task S2 Racing multiple-plane Pylon Racing quality flagger caller have great impact ability make turn proper time Trying anticipate flag usually results missing turn eats up much time can gain correctly antici pating other turns advice anticipate turns early Race prepared turn flagup signal nothing until turn actually called airplane slightly ahead you can use signal anticipate own turn ahead Race should risk missed turn flagger caller consistent last two turns can antic ipated slightly judging time between flag-up turn signal Use ohitude Try adjust angle dive end up proper altitude end Race have found best try adjust trim during Race adjust altitude using either climbing diving turns significant wind component parallel course use climbing turn upwind leg diving turn downwind leg will allow wind help shorten turn upwind side will minimize overshoot downwind side Sometimes obvious slot good air just below top slope has great lift minimal crosswind will have found slot good air during prestart flying should use altitude first few laps speed through course get down slot finish remember nothing magical about top slope might well dive well below final leg fastest finish Fixing Mariah number years ago de signed small aerobatic Slope ship called Mariah appeared construction article pages MA June 1988 issue plan //588 P. 5h.tdg 1/4 Scale Kits $12995 Epoxy/Glass/Foam Construction Drawings Data Formula 120 Pylon Sport Standoff ScaleKit Price ping Credit Cards WelcomedOhio Residents Add 7% since time people have built Sailplane variety results such builder Dave Kurth wrote follow ing article journal Pikes Peak Soar ing Society Spoiler number us club purchased wood build small Sailplane designed Mark Triebes called Mariah plane sup posed fast aerobatic needed light breeze fly few people actually built flew Mariah Last October maiden flight since plane has caused nothing problems As result peo ple did finish building have given up Well may reason start up again first problem severe roll rates due short thin wings ailerons being too sensi tive So made aileron throw very small next problem keeping air took hur ricane-force winds provide sufficient lift problem helped moving center-ofgravity back some distance Being nose-heavy re sulted altitude loss turn Barry made bigger wings lower wing loading helped lot used Sel ig 3021 airfoil stretched wing out 277 made leading edge parallel trailing edge using root rib shape way out tip kept fully sheeted wing added Quabeck tip Since ribs same very easy make result wing about twice area other problem still persisted plane could loop both Barrys Halfway around loop plane would just quit flying tumble aimlessly theory tail too close wings steep angle attack during loop air flowing over wing hitting tail turbulent some way nor mal resulted elevator losing airflow plane losing control conclusion make fuselage longer dis turbed airflow would settle down time met elevator April Slope-bash contest flew Mariab bigger wings crashed first lap totally due error Since crash left fuselage two pieces decided make longer question long no idea decided make educated guess Mark Triebes says plane flies great sea level figured calculate fuse lage length difference between 7000 ft sea level air pressure 7000 ft about 75% sea level So measured fuselage divided 075 decided tail should four inches further back plans specify 146 Model Aviation RC Slope Soaring/Triebes Continued page 143 JjjjJg~jajr2u i ~ WE ARE SHOOTING DOWN HIGH BALSA PRICES WITH SUPER QUALITY Satisfaction Guaranteed Direct Only BALSA SHEETS36 41 30 SALSA SliCKS 3641 1162331161425 3322401 16 3813 182431161214 316244332 1410 4 254332 3812 1 32331332 1216 12033118 1808 116331 49 3119 141116 332344 58 3716 381218 18 35471 4518 121024 31636282 553163161116 14 323 95 61316 381720 516380110316 122230 36 38/6124 7114 141624 12 3 110155I 4 381526 34316019114122130 116454 76 4814343444 332470 94 5614 14055 18 490106 665165162128 316443122 7536 392/37 144114134 8439123246 38 4160225 13936 344255 2 422/26136 15270 12123653 MATCHED SHEETS12 344662 33241001215878 13410859594995 3 6 42034 346790 443 BALSA HOT LINE Call 806 745 6394 10am 6pm Central Time BALSA TRIANQL ES 36 25 9630 35 45 55 BALSA PLANKS 36 90 25 329 4293 11/23302 1 1/2,4396 242231 243335 244476 343515 344716 TAPERED SHEETS36 14265 14395 364268 38346 123120 LONE STAR EPOXY 904L,l.8 35 Sooo598 15,,599 3oooo596 LIGHT 4-6 LB WOOD36 1/32362 1/204362 1/16362 3/32374 1/8381 3/163105 1/443125 3/83160 1/23190 3/443300 143425 1/16498 3/3244118 1/844135 3/1644167 1/444188 3/644285 1/24385 TRAIL INC EDGE 36 14132 51611439 3811246 12270 INSTANT CL UE 1 0 Thck298 1 o 75,296 2, Thck 550 2o /6 556 BASSWOOD41 3/1631626 3/161430 3/163/938 3/161246 3/163460 141442 14 3849 143460 363660 361230 3/63490 121290 1234100 BUNDLE DEALS 20116336 699 20116436 1035 20-332 336 865 15332 436 955 161/6336735 101/6436695 15316336 920 10316436 835 1014336 655 1014436 930 1036336670 53/6 650 51/2336540 51/24361060 10332446 885 518446 500 5316448 600 514 446 645 _________ I * NEW * Hundreds 0 new sizes accessories tinishing materials Send #10 SASE latest catalog SPRUCE STICKS 3641 18181725 18142026 183/62232 3163162638 1/4 143450 1/4 3/840 55 144 12 45 65 3/8 384969 3/812 60 77 1/24 1/26686 12347597 SPRUCE TRIANGLES 36 3/93/647 121264 344 34 LITEPLY48 15x6 18 x 12 14 s6 14612 LONE STAR MODELS cone Handling Charge pay UPS Add $300 COD *400 extra PP APO FPO 1623 57th St Lubbock TX 79412 States accept Visa Mastercard peosonal checks COD65% tax Texas US currency Minimum Wood Order $1000 6Yen HARD MAPLE 1 4438 38 3/8 3612 3834 1 2 42 45 50 56 66 BIRCH 00 WELS36 19 05 316 14 516 38 11 14 2S 32 left fuselage identical plans tween nose rear access hatch F-4 formery point added extra four inches left old F-4 former cause still intact rear made new F 2 F-3 F-4 formers redesigned lengthened fuselage wing located same place tile fuselage same angle incidence ignored extra height fu selage around wing also reinforced fuse lage leading edge wing meets side After getting far add about 06 oz nose get CG 22% old plane bigger wings needed tail weight test flight Sunday August 6 wind I/he north 10 20 mph flew bowl tt3e north side hill road going top hill located al ready plane trimmed gave toss able maintain altitude little diffi culty did have give little down-trim get plane go forward over hill got used flying just doing S-turns noticed ailerons now seemed have too little control cant explain oneit may head After getting comfort able amount altitude attempted loop No problem tried tight loops slow loops no surprises flew inverted few sec onds determined sufficient stick movement actually get plane climb inverted plane no trouble verted got too nervous somehow got right-side-up again problem couldnt snap roll because isnt enough throw ailerons should easy fix So appears four inches fu selage will fix looping problem bigger wings also help although seems plane flies slower will take some flights see performance can improved least last major problem has solved Its just coincidence majority Slopers live fly California coast smooth dense air allows us get away some things cant quite manage say 7000 ft initially designed Man ah no intention being purely sealevel ship because 99% flying California characteristic obviously found its way design have heard quite few people built Mariah no problems stall Slop ers located coast Im glad see Dave didnt give up Mariah able adapt design meet particular flying conditions develop unique personal plane lesson learned bet planes suited fliers small modifications can make otherwise unsuitable design perfect style flying great aspects sport opportunity ex periment something should limited just designers Silhouette Paralleling growth Slope Soaring has development number small model companies feature Slope Glider kits companies Douglas Aircraft back received letter owner operator Douglas Aircraft Doug Hertzog Doug provided some information Slope de signs since time have opportu nity build fly first design Sil houette Silhouette spans 43 uses modified Eppler 374 airfoil wing loading right around 10 oz/sq ft Silhouette ideal slope plane requires two-channel radio mini micro equipment kit includes machine-cut plywood balsa parts foam core wings plans instructions com plete hardware package what Doug has say about Sil houette Silhouette aerobatic Slope Glider de signed specifically speed energy retention maneuverability ship displays very clean handling characteristics both upside-down right-side-up capable outside well inside maneuvers limited imagi nation Its simple fuselage construction balsa-sheeted foam core wing provide less experienced modeler opportunity build superior aircraft minimum ef fort' its small size light weight Sil houette does need lot wind fly right conditions blast fly winds blowing 15 20 mph ifs just begin ning get fun zone small size Silhouette makes ideal smaller slopes bluffs lucky enough have access large slope may find Sil houette just what looking big brother Silhouette Quick silver Doug says Quicksilver due re leased near first year should available time read Quick silver employs modified 8% thickness root Selig 6060 airfoil will easily house fullsized radios 500-mAb battery youd like try out planes yourself check local hobby shop contact February 1990 147 CUSTOM CUT CONTEST BALSA Sheets Piece ed Close Tolerances AAA Grade Dried ped 100% a serious modeler want performance must try 4-6 lb balsa 3 PLYBIRCH 48 1164x12835 132s12475 1I16x12475 118x12496 S FY3WH 48 3132x12700 1/8x12775 3116x12625 114x12625 318x12725 61 1/2x12900 GROG VEDLG MOUNTS 13 Inches 1753834/1940 3503834532140 275I 234/316/45 550 THIRTY-SIXTH ANNUAL RADIO CONTROL EXPOSITION APRIL 6 7 8 1990 FRIDAY9amto6pm SATURDAY9amto6pm SUNDAY9amto43Opm TOLEDO SPORTS ARENA ONE MAIN STREET TOLEDO OHIO TICKETS can purchased door ADVANCE sending self-addressed stamped business size 41/sx91/s envelope TICKETS 38235 Castle Romulus Ml 48174 orders above 10 tickets must include double postage US orders must include 25 cents per order handling charge foreign orders must include 50 cents per order handling charge need send addressed envelope will provide necessary postage NOTE Registered Express Type Mail Orders Will Acceptedll Include check money order US funds made payable Weak Signals R/C Club Ticket prices $400 per day foradultsandSlOOperdayforchildren 12 under Please specify number Deadline ticket orders March 30 1990 sales final non-refundable Hotel info map area may obtained sending stamped self-addressed envelope ticket address above Any other Exposition information avail able contacting Wayne Yeager co director ticket address phone 313 941-6661 Will Have TraditionalSwap Shop Saturday Night Auction COMPETITION CLASSES NON-MILITARY SPORT SCALE PLANE AMA Rules MILITARY SPORT SCALE PLANE AMA Rules PRECISION SCALE PLANE AMA Rules PATTERN PLANE No Jets SPORT MONO-PLANE non-scale models SPORT BI-PLANE non-scale models OLD TIMER FREE FLIGHT R/C ASSIST R/C SAILPLANE non-scale models No Engines HELICOPTER R/C CAR COMPETITION BOAT MILITARY SCALE BOAT PLEASURE POWER BOAT WORKING VESSEL-UNARMED presented Weak Signals R/C Club Toledo Ohio ma maicnea -errormance ystem TOP PERFORMANCE K&B ENGINES MrrlaieMaine K&B FUELS K&B GLOW PLUGS 9 Blends4 Choices Matched Finish System BEST APPEARANCE K&B FIBERGLASS CLOTH K&B Micro-Balloons FILLER K&B SUPER FOXY RESIN K&B SUPER FOXY THINNER K&B SUPER FOXY PRIMER K&B SUPER FOXY PAINT K&B MIXING CUPS Doug directly Douglas Aircraft PO Box 92472 Long Beach CA 90809 phone 1213/498-1737 Mad scientists like tinkering unique innovative designs have developed mad scientist reputation other fliers youre alone have faced kind treatment throughout modeling career have others such experimenter Navy Lt Tom Staggs received fantastic letter Tom detailing work has done fly ing wings Having mechanical engineer ing major college currently flying EA-6Bs Navy Tom has practical knowledge ability come up some very unique interesting ideas fellow mad scientist especially flying wings Tom would like trade ideas failures successes like Heres address Lt Tom Staggs VAQ 129 E/W NAS Whidbey Island Oak Harbor WA 98278-6100 RC Electrics/Kopski Continued page 43 Amptique much better respect kit lacks detailed construction/instruction manual choose go very fineflying models have little no previous build ing experience sure can get some experi enced help construction before start easiest build beginners seem Electra Mirage PT Electric Unlike first planes have extensive highly de tailed highly illustrated instruction booklets such good beginning builders aver age models have generally heavier wing loadings thus fly somewhat fasterbut still make pretty good basic trainers folks think fair say fly easily less easily first three ElectriCUB also falls category being semiscale has others ElectriCUB does fly beautifully trainerslow stable forgivingits too pretty purpose What mean CUB has scale details because somewhat complicated fragile reacts less better bumps often associated training recommend next plane models listed Electra differs its Glider also largest model listed Some folks like idea Sailplane would good choice plane best bunch carrying conventional radiosie standard-size servos turn printer airfoil plotter with.. FOILED AGAIN! llljj AIRFOtLS tN ANY CHORD UP TO 24 INCHES o MODIFY THtCKNESS CAMBER & TRAILING EDGE PLOT SKIN THICKNESS FOR SHEETED WINGS o ENTER DATA EASILY VIA INTELLIGENT EDITOR USER-FRIENDLY MENU-DRIVEN OPERATION INCLUDES 18-PAGE ILLUSTRATED USER MANUAL $3995 as onkn plea ,rios aeaeaioeal bask 8n4fas US$50 npa,ad - pleas asepn& pasasn 1, S,d h,k o,,n .le CYGNET Software 24843 Del Prado #141b Dana Point CA 92629 opposed microservos 500-mAh receiver bat tery packs large receivers excels because its large wing area case always rec ommend using micro-sized radio systems planes excess weight saved about five eight ounces definitely shows up better flight performance lighter model slower can made flya worthy goal beginners Also lighter model longer flight time per charge something else very worthwhile some other trainer models mar ket such Midwest Aero-Lectric Guillow Aeronca Ive included because Ive no personal experience some other Electric kits definitely basic trainers include ElectraStreak Electric Hots Skyvolt Micro Racer Etude Race Rat Wasp name some Now back good instructor get quite few letters wherein guys local club wont help new guy Electric seem several reasons given unfamiliarity motors batteries some earlier bad im pression experience fear Electric con viction Electric dont fly kid perhaps macho trip power club run let offer thought two suggestions thought Chances group rejected didnt have good structor club roster anyway sugges tions See can find someone locally likes experienced Sailplanes OTs lack Electric experience chances theyll good job checking out plane getting air 2 Go back beginning column read about Elec tric Connection service Someday future common reaction local field will some thing like dont fly greasy noisy kid stuff fella' So have thoughts offerings instructors trainers general some Elec tric trainers particular Now some wont have write letters about thats help well Thrust measurements propeller pull seem interest Electric modelers get couple letters year readers se riously pursuit thrust study topic par ticular Ive received several lengthy detailed let ters numerous photographs thrust measure ment data collected homemade test setups readers over country have say some test setup fixtures down right impressive 148 Model Aviation h p
Edition: Model Aviation - 1990/02
Page Numbers: 40, 41, 143, 146, 147, 148
INTERNATIONAL Soaring RC Scale Fun Fly 1990 edition exciting fun fly TnCities WA has slated May 25-27 years fun fly will best yet number activities planned Besides having opportu nity fly ot best slopes country some hangar-flying other Scale en thusiasts heres what have look forward years event Friday night Slope Soaring News will sponsoring catered Washington wine tasting social evening Saturdays docket will include banquet din ner followed guest speaker Michael Selig manufacturer-supported raffle Selig Donovan wind tunnel tests completed re cently Michael will discussing some important interesting findings raffle annual event has become almost leg endary having large numbers quality prizes such manufacturers Airironics JR Ra dios Sig Beemer RC West American Sail plane Designs Pre-registration required event include yourself fun 1990 fun fly contact Tn-City Soarers 632 Meadows Dr E Richland WA 99352 tel either 1-509/6275224 1-509/525-7066 Flying buddies Ever get feeling plane king hill know slope top bottom Slope ship has hours its extension self Well maybe after reading piece Charlie Morey Slope Soaring News youll put back place much better Theyd fly apartgoing far out toward distant hori zon roust some pigeons phone line send gull scurrying cover beach belowthen charge back over ridge cavort together lift Generally ignored brightly colored Gliders sharing airspace few natural colored planes got attention among gray Cliff Hangar Models F-20 40 Model Aviation Radio Conoi Slope Soaring Mark Triebes 20794 Kreisler Ct Saratoga CA 95070 uoug nerizog snows nis iinouene ana aigger Drainer inc uuIcKsIIver ibis months column looks Silhouette ideal Sailplane small slopes bluffs Hertzog photo Silhouette lightweight agile Slope ship Build light skill itll stay up floaters Lean it will really take off Construction Silhouette very sim ple glass fuselage available serious Sloper Doug Hertzog photo two themperegrine falcons darting diving together over oceanside cliff Point Fermin Only Bennie seemed know much about said must mates since falcons same sex arent partic ularly friendly toward another two seemed enjoy flying much Navy Tom Staggs Aldebaran fly ing wing Despite garnering reputation mad scientist Tom continues experiment variety unique designs major ity being flying wings Photo Tom Staggs Beta Rigel high-speed delta wing Whats wrong plane Apparently Note model rocket engine used Marlah doesnt like fly high-altitude rocket-assisted takeoffs RATO idea sites Dave Kurth takes look prob number Slopers have kicked around lems encountered Mariah Toms first author has seen What enlightens us own unique solu expect Jet pilot Staggs photo tions adapting Glider high altitude Perhaps looked like lunch trespassing bird prey needed inspected sent its way heavy little F-20 no slouch Ill tell right now no match fastest bird world peregrines took interest cruised over just hammerheaded through 100-ft stall turn locked just about foot above tail Okay thought Lets see what comes next put F-20 steep dive bird held its distance exactly tucking its wings slightly match terminal velocity dive Tracking model Jet kid stuff predator snatches its live fast highly-motivatednot-to-become-meals quarry Out air day bottom dive pulled up steep climb No problem falcon extended its wing tips slightly drawn along visible string maintained its 12-in distance Lets see can split-S thought rolled F-20 inverted falcon backed off slightly sizing up situation plane screamed through its downward arc too rolled reattached himself just behind tail little hawk much faster quicker turn ing Glider F-20 tasty would have lunch heard Benriie chuckling behind Hes got servo feather said laughing anxious see what falcon would nexthopefully short snatching Out sky powerful talonsbut appar ently become bored pace flick amazing wings gone search better sport leaving play breeze other earthbound amateurs Anyone has opportunity fly real thing can relate Charlies story Nothing can match grace power skill birds Charlie puts well Going wing-tip-to-wing-tip guys will remind youre nothin pigeon sky Slope Racing tips contest season rap idly approaching heres article will give novice Racers few helpful suggestions will remind expert Racers few basics may have forgotten over time article written Pat Chewning appeared newsletter Portland Area Sailplane Society Dive wind am reminded situa tion occurred Slope Races spring wind exactly perpendicular course made downwind leg very quick upwind leg very slow especially noticeable slower airplanes started think about deal wind like gain best speed through course way visualize problem re alize altitude fuel source want gain fastest speed through course run Out fuel altitude figured would want alter speed leg diving increasing speed upwind leg uses alti tude decreases time spend fighting wind Alternatively would want pull up somewhat downwind leg conserving alti tude spending time wind aid ing course speed developed equation time takes cover distance upwind downwind given windspeed dive angle flying speed developed another equation alti Continued page 143 PILOT GLASSES. HOW VALUABLE IS YOUR EYESIGHT Adjustable side frames free-flaw ventilation Extremely light weight added comfort Blocks harmful " ultraviolet radiation Attractive case included Wraparound frame fits comfortably over prescription glasses tz mist coated far scratch resistance Made entirely Polycarbonate far impact protection ANSI Z871 specifications Available in Clear shop work $1325 Amber overcast days & late afternoons $14~ Gray S14~ & Mirror S19~ sunny days CA Mask $15~ Paint Mask S2O~ member club hit prop blade thrown 60 engine close range tip blade struck Safety Plus glasses saved him serious injury possibly loss eye incident convinced everyone should wear safety glasses near model airplane engines being run upEd Saul Prices include shipping handtingSecretary Treasurer ____________Pikes Peak RC Club FLIEJ5 See hobby dealer first doesnt have what need order direct SAFETY PLUS PO Box 1173 Dept iM Clinton MS 39056 ORDERS ONLY 1-800-842-7233 Cont USI Mississippi 6011924-9640 VISA/MO February 1990 41 SUCKER-KIT$5995 Show & Tell Video . $3995 Add $400 Shipping & handling Ml residents add 4% sales lax 4-5 3100 SASE product list 4 ssamples real wind veneer skins Product List locludes Napless Arrow t Hinges Carbon Tow Mylar Sheet E hTech items 0 Dealer Inquires Welcome ND CHECK OR MONEY ORDER TO PO Box 866 5 OC Lapeer Ml 48446 313 664-3330 composite Aircraft Eng & Supply FAX 664-9780 WILLIAMS ACCESSORIES BROTHERS 4 PILOTS STANDARD TSMAN RACING TARY WHEELS AGE TH CONTOUR BALLOON EN AGE 4 ENGINES PRATT & WHITNEY HT HONE ICKER5 DAU EELLb Radio Technique/Myers Continued page 37 ducts electricity know Think about lead/acid battery car little bit sul phuric acid conducts lot electricity Solar flares nuclear explosions sun emit radio waves goes time atmosphere magnetic field earth protect us effects People Alaska see effects northern lights auro ra borealis Darrel Kline AMA 84898 Out Everett WA sent clipping remind II years solar flare activity sun reaches peak According NOAA National Ocean ographic Atmospheric Administration solar flare activity will peak 1991 can expect will interference complaints sorts RCers 1991 because AMA will sanction use 60 RC channels aircraft Therefore frequency spacing between RC transmitters use will 20 kHz instead 40 kHz tween RC systems now Part complaints will come people clinging outmoded wideband equipment Other complaints will traceable interference commercial transmitters have since 1983 10 kHz away RC channels Whats left may traceable solar flare emis sions may notice glitches People watching TV channels TV2 TV4 TV5 will see ing snowy pictures loss color wavelike interferences crawling over screen what worth could take portable TV field use monitor see above disturbances screen might serve warning fly Scale model have spent year decorating RC channels located frequencywise between broadcast TV channels TV4 TV5 should confused cable chan nels 4 5 Cable TV will affected occasional black outs during year solar flares RC Slope Soaring/Triebes Continued page 41 tude used up given dive angle flying speed Unfortunately have missing equation flying speed function dive angle know increases dive angle assume must determined empirically experiment something can simply calculate So dont have fancy equation prove hypothesis sure seems reasonable Use prestart flight time typical Slope Race period flight time prior start Race often wasted Most people know enough use time gain alti tude Race other uses Fly plane along slope find location best lift could well beyond ends course want spend time gaining altitude lift will also vary distance away face slopefind lift best various alti tudes may notice best lift close hill low altitudes farther hill higher altitudes Use time increase distance hill staying wind flying constantly angled wind stay course follows can gain some dis tance wind can decrease crab angle during Race gain faster time drifting back toward slope wind Great observation hint MT Use prestart time trim aircraft fast flight find much better have air plane trimmed too much down-trim too little way might have put some upstick control speed during race wont have use down-stick less comfortable much less natural Get good start good start Race gives obvious physical advantage real mental boost carries through rest Race As countdown approaches start aircraft should have plenty altitude should well away slope upwind should flying generous amount up-stick conserve altitude com pensate down-trim needed Rac ing approximately 10-second mark plane should crossing starting line op posite direction reference point judging begin run fivesecond mark initiate 1800 turn towards start line turn will cost some time youll make up diving toward start line creasing speed dive should initiated releasing up-stick youve held during altitude-gaining prestart plane will naturally gain speed toward start have seen too pilots waste valuable altitude making enormous dives start gaining tremendous speed burns off about halfway through first leg course Youll want drop Continued page 146 February 1990 143 enough get plane speed will lose one-tenth altitude lap assuming 10-lap speed run want plane cross start just after its announced can adjust timing flying away slope youre too early diving slightly too late better two seconds late start rather early have recross start line judge carefully Turning quality turns greatly af fects time through course AMA task S2 Racing multiple-plane Pylon Racing quality flagger caller have great impact ability make turn proper time Trying anticipate flag usually results missing turn eats up much time can gain correctly antici pating other turns advice anticipate turns early Race prepared turn flagup signal nothing until turn actually called airplane slightly ahead you can use signal anticipate own turn ahead Race should risk missed turn flagger caller consistent last two turns can antic ipated slightly judging time between flag-up turn signal Use ohitude Try adjust angle dive end up proper altitude end Race have found best try adjust trim during Race adjust altitude using either climbing diving turns significant wind component parallel course use climbing turn upwind leg diving turn downwind leg will allow wind help shorten turn upwind side will minimize overshoot downwind side Sometimes obvious slot good air just below top slope has great lift minimal crosswind will have found slot good air during prestart flying should use altitude first few laps speed through course get down slot finish remember nothing magical about top slope might well dive well below final leg fastest finish Fixing Mariah number years ago de signed small aerobatic Slope ship called Mariah appeared construction article pages MA June 1988 issue plan //588 P. 5h.tdg 1/4 Scale Kits $12995 Epoxy/Glass/Foam Construction Drawings Data Formula 120 Pylon Sport Standoff ScaleKit Price ping Credit Cards WelcomedOhio Residents Add 7% since time people have built Sailplane variety results such builder Dave Kurth wrote follow ing article journal Pikes Peak Soar ing Society Spoiler number us club purchased wood build small Sailplane designed Mark Triebes called Mariah plane sup posed fast aerobatic needed light breeze fly few people actually built flew Mariah Last October maiden flight since plane has caused nothing problems As result peo ple did finish building have given up Well may reason start up again first problem severe roll rates due short thin wings ailerons being too sensi tive So made aileron throw very small next problem keeping air took hur ricane-force winds provide sufficient lift problem helped moving center-ofgravity back some distance Being nose-heavy re sulted altitude loss turn Barry made bigger wings lower wing loading helped lot used Sel ig 3021 airfoil stretched wing out 277 made leading edge parallel trailing edge using root rib shape way out tip kept fully sheeted wing added Quabeck tip Since ribs same very easy make result wing about twice area other problem still persisted plane could loop both Barrys Halfway around loop plane would just quit flying tumble aimlessly theory tail too close wings steep angle attack during loop air flowing over wing hitting tail turbulent some way nor mal resulted elevator losing airflow plane losing control conclusion make fuselage longer dis turbed airflow would settle down time met elevator April Slope-bash contest flew Mariab bigger wings crashed first lap totally due error Since crash left fuselage two pieces decided make longer question long no idea decided make educated guess Mark Triebes says plane flies great sea level figured calculate fuse lage length difference between 7000 ft sea level air pressure 7000 ft about 75% sea level So measured fuselage divided 075 decided tail should four inches further back plans specify 146 Model Aviation RC Slope Soaring/Triebes Continued page 143 JjjjJg~jajr2u i ~ WE ARE SHOOTING DOWN HIGH BALSA PRICES WITH SUPER QUALITY Satisfaction Guaranteed Direct Only BALSA SHEETS36 41 30 SALSA SliCKS 3641 1162331161425 3322401 16 3813 182431161214 316244332 1410 4 254332 3812 1 32331332 1216 12033118 1808 116331 49 3119 141116 332344 58 3716 381218 18 35471 4518 121024 31636282 553163161116 14 323 95 61316 381720 516380110316 122230 36 38/6124 7114 141624 12 3 110155I 4 381526 34316019114122130 116454 76 4814343444 332470 94 5614 14055 18 490106 665165162128 316443122 7536 392/37 144114134 8439123246 38 4160225 13936 344255 2 422/26136 15270 12123653 MATCHED SHEETS12 344662 33241001215878 13410859594995 3 6 42034 346790 443 BALSA HOT LINE Call 806 745 6394 10am 6pm Central Time BALSA TRIANQL ES 36 25 9630 35 45 55 BALSA PLANKS 36 90 25 329 4293 11/23302 1 1/2,4396 242231 243335 244476 343515 344716 TAPERED SHEETS36 14265 14395 364268 38346 123120 LONE STAR EPOXY 904L,l.8 35 Sooo598 15,,599 3oooo596 LIGHT 4-6 LB WOOD36 1/32362 1/204362 1/16362 3/32374 1/8381 3/163105 1/443125 3/83160 1/23190 3/443300 143425 1/16498 3/3244118 1/844135 3/1644167 1/444188 3/644285 1/24385 TRAIL INC EDGE 36 14132 51611439 3811246 12270 INSTANT CL UE 1 0 Thck298 1 o 75,296 2, Thck 550 2o /6 556 BASSWOOD41 3/1631626 3/161430 3/163/938 3/161246 3/163460 141442 14 3849 143460 363660 361230 3/63490 121290 1234100 BUNDLE DEALS 20116336 699 20116436 1035 20-332 336 865 15332 436 955 161/6336735 101/6436695 15316336 920 10316436 835 1014336 655 1014436 930 1036336670 53/6 650 51/2336540 51/24361060 10332446 885 518446 500 5316448 600 514 446 645 _________ I * NEW * Hundreds 0 new sizes accessories tinishing materials Send #10 SASE latest catalog SPRUCE STICKS 3641 18181725 18142026 183/62232 3163162638 1/4 143450 1/4 3/840 55 144 12 45 65 3/8 384969 3/812 60 77 1/24 1/26686 12347597 SPRUCE TRIANGLES 36 3/93/647 121264 344 34 LITEPLY48 15x6 18 x 12 14 s6 14612 LONE STAR MODELS cone Handling Charge pay UPS Add $300 COD *400 extra PP APO FPO 1623 57th St Lubbock TX 79412 States accept Visa Mastercard peosonal checks COD65% tax Texas US currency Minimum Wood Order $1000 6Yen HARD MAPLE 1 4438 38 3/8 3612 3834 1 2 42 45 50 56 66 BIRCH 00 WELS36 19 05 316 14 516 38 11 14 2S 32 left fuselage identical plans tween nose rear access hatch F-4 formery point added extra four inches left old F-4 former cause still intact rear made new F 2 F-3 F-4 formers redesigned lengthened fuselage wing located same place tile fuselage same angle incidence ignored extra height fu selage around wing also reinforced fuse lage leading edge wing meets side After getting far add about 06 oz nose get CG 22% old plane bigger wings needed tail weight test flight Sunday August 6 wind I/he north 10 20 mph flew bowl tt3e north side hill road going top hill located al ready plane trimmed gave toss able maintain altitude little diffi culty did have give little down-trim get plane go forward over hill got used flying just doing S-turns noticed ailerons now seemed have too little control cant explain oneit may head After getting comfort able amount altitude attempted loop No problem tried tight loops slow loops no surprises flew inverted few sec onds determined sufficient stick movement actually get plane climb inverted plane no trouble verted got too nervous somehow got right-side-up again problem couldnt snap roll because isnt enough throw ailerons should easy fix So appears four inches fu selage will fix looping problem bigger wings also help although seems plane flies slower will take some flights see performance can improved least last major problem has solved Its just coincidence majority Slopers live fly California coast smooth dense air allows us get away some things cant quite manage say 7000 ft initially designed Man ah no intention being purely sealevel ship because 99% flying California characteristic obviously found its way design have heard quite few people built Mariah no problems stall Slop ers located coast Im glad see Dave didnt give up Mariah able adapt design meet particular flying conditions develop unique personal plane lesson learned bet planes suited fliers small modifications can make otherwise unsuitable design perfect style flying great aspects sport opportunity ex periment something should limited just designers Silhouette Paralleling growth Slope Soaring has development number small model companies feature Slope Glider kits companies Douglas Aircraft back received letter owner operator Douglas Aircraft Doug Hertzog Doug provided some information Slope de signs since time have opportu nity build fly first design Sil houette Silhouette spans 43 uses modified Eppler 374 airfoil wing loading right around 10 oz/sq ft Silhouette ideal slope plane requires two-channel radio mini micro equipment kit includes machine-cut plywood balsa parts foam core wings plans instructions com plete hardware package what Doug has say about Sil houette Silhouette aerobatic Slope Glider de signed specifically speed energy retention maneuverability ship displays very clean handling characteristics both upside-down right-side-up capable outside well inside maneuvers limited imagi nation Its simple fuselage construction balsa-sheeted foam core wing provide less experienced modeler opportunity build superior aircraft minimum ef fort' its small size light weight Sil houette does need lot wind fly right conditions blast fly winds blowing 15 20 mph ifs just begin ning get fun zone small size Silhouette makes ideal smaller slopes bluffs lucky enough have access large slope may find Sil houette just what looking big brother Silhouette Quick silver Doug says Quicksilver due re leased near first year should available time read Quick silver employs modified 8% thickness root Selig 6060 airfoil will easily house fullsized radios 500-mAb battery youd like try out planes yourself check local hobby shop contact February 1990 147 CUSTOM CUT CONTEST BALSA Sheets Piece ed Close Tolerances AAA Grade Dried ped 100% a serious modeler want performance must try 4-6 lb balsa 3 PLYBIRCH 48 1164x12835 132s12475 1I16x12475 118x12496 S FY3WH 48 3132x12700 1/8x12775 3116x12625 114x12625 318x12725 61 1/2x12900 GROG VEDLG MOUNTS 13 Inches 1753834/1940 3503834532140 275I 234/316/45 550 THIRTY-SIXTH ANNUAL RADIO CONTROL EXPOSITION APRIL 6 7 8 1990 FRIDAY9amto6pm SATURDAY9amto6pm SUNDAY9amto43Opm TOLEDO SPORTS ARENA ONE MAIN STREET TOLEDO OHIO TICKETS can purchased door ADVANCE sending self-addressed stamped business size 41/sx91/s envelope TICKETS 38235 Castle Romulus Ml 48174 orders above 10 tickets must include double postage US orders must include 25 cents per order handling charge foreign orders must include 50 cents per order handling charge need send addressed envelope will provide necessary postage NOTE Registered Express Type Mail Orders Will Acceptedll Include check money order US funds made payable Weak Signals R/C Club Ticket prices $400 per day foradultsandSlOOperdayforchildren 12 under Please specify number Deadline ticket orders March 30 1990 sales final non-refundable Hotel info map area may obtained sending stamped self-addressed envelope ticket address above Any other Exposition information avail able contacting Wayne Yeager co director ticket address phone 313 941-6661 Will Have TraditionalSwap Shop Saturday Night Auction COMPETITION CLASSES NON-MILITARY SPORT SCALE PLANE AMA Rules MILITARY SPORT SCALE PLANE AMA Rules PRECISION SCALE PLANE AMA Rules PATTERN PLANE No Jets SPORT MONO-PLANE non-scale models SPORT BI-PLANE non-scale models OLD TIMER FREE FLIGHT R/C ASSIST R/C SAILPLANE non-scale models No Engines HELICOPTER R/C CAR COMPETITION BOAT MILITARY SCALE BOAT PLEASURE POWER BOAT WORKING VESSEL-UNARMED presented Weak Signals R/C Club Toledo Ohio ma maicnea -errormance ystem TOP PERFORMANCE K&B ENGINES MrrlaieMaine K&B FUELS K&B GLOW PLUGS 9 Blends4 Choices Matched Finish System BEST APPEARANCE K&B FIBERGLASS CLOTH K&B Micro-Balloons FILLER K&B SUPER FOXY RESIN K&B SUPER FOXY THINNER K&B SUPER FOXY PRIMER K&B SUPER FOXY PAINT K&B MIXING CUPS Doug directly Douglas Aircraft PO Box 92472 Long Beach CA 90809 phone 1213/498-1737 Mad scientists like tinkering unique innovative designs have developed mad scientist reputation other fliers youre alone have faced kind treatment throughout modeling career have others such experimenter Navy Lt Tom Staggs received fantastic letter Tom detailing work has done fly ing wings Having mechanical engineer ing major college currently flying EA-6Bs Navy Tom has practical knowledge ability come up some very unique interesting ideas fellow mad scientist especially flying wings Tom would like trade ideas failures successes like Heres address Lt Tom Staggs VAQ 129 E/W NAS Whidbey Island Oak Harbor WA 98278-6100 RC Electrics/Kopski Continued page 43 Amptique much better respect kit lacks detailed construction/instruction manual choose go very fineflying models have little no previous build ing experience sure can get some experi enced help construction before start easiest build beginners seem Electra Mirage PT Electric Unlike first planes have extensive highly de tailed highly illustrated instruction booklets such good beginning builders aver age models have generally heavier wing loadings thus fly somewhat fasterbut still make pretty good basic trainers folks think fair say fly easily less easily first three ElectriCUB also falls category being semiscale has others ElectriCUB does fly beautifully trainerslow stable forgivingits too pretty purpose What mean CUB has scale details because somewhat complicated fragile reacts less better bumps often associated training recommend next plane models listed Electra differs its Glider also largest model listed Some folks like idea Sailplane would good choice plane best bunch carrying conventional radiosie standard-size servos turn printer airfoil plotter with.. FOILED AGAIN! llljj AIRFOtLS tN ANY CHORD UP TO 24 INCHES o MODIFY THtCKNESS CAMBER & TRAILING EDGE PLOT SKIN THICKNESS FOR SHEETED WINGS o ENTER DATA EASILY VIA INTELLIGENT EDITOR USER-FRIENDLY MENU-DRIVEN OPERATION INCLUDES 18-PAGE ILLUSTRATED USER MANUAL $3995 as onkn plea ,rios aeaeaioeal bask 8n4fas US$50 npa,ad - pleas asepn& pasasn 1, S,d h,k o,,n .le CYGNET Software 24843 Del Prado #141b Dana Point CA 92629 opposed microservos 500-mAh receiver bat tery packs large receivers excels because its large wing area case always rec ommend using micro-sized radio systems planes excess weight saved about five eight ounces definitely shows up better flight performance lighter model slower can made flya worthy goal beginners Also lighter model longer flight time per charge something else very worthwhile some other trainer models mar ket such Midwest Aero-Lectric Guillow Aeronca Ive included because Ive no personal experience some other Electric kits definitely basic trainers include ElectraStreak Electric Hots Skyvolt Micro Racer Etude Race Rat Wasp name some Now back good instructor get quite few letters wherein guys local club wont help new guy Electric seem several reasons given unfamiliarity motors batteries some earlier bad im pression experience fear Electric con viction Electric dont fly kid perhaps macho trip power club run let offer thought two suggestions thought Chances group rejected didnt have good structor club roster anyway sugges tions See can find someone locally likes experienced Sailplanes OTs lack Electric experience chances theyll good job checking out plane getting air 2 Go back beginning column read about Elec tric Connection service Someday future common reaction local field will some thing like dont fly greasy noisy kid stuff fella' So have thoughts offerings instructors trainers general some Elec tric trainers particular Now some wont have write letters about thats help well Thrust measurements propeller pull seem interest Electric modelers get couple letters year readers se riously pursuit thrust study topic par ticular Ive received several lengthy detailed let ters numerous photographs thrust measure ment data collected homemade test setups readers over country have say some test setup fixtures down right impressive 148 Model Aviation h p
Edition: Model Aviation - 1990/02
Page Numbers: 40, 41, 143, 146, 147, 148
INTERNATIONAL Soaring RC Scale Fun Fly 1990 edition exciting fun fly TnCities WA has slated May 25-27 years fun fly will best yet number activities planned Besides having opportu nity fly ot best slopes country some hangar-flying other Scale en thusiasts heres what have look forward years event Friday night Slope Soaring News will sponsoring catered Washington wine tasting social evening Saturdays docket will include banquet din ner followed guest speaker Michael Selig manufacturer-supported raffle Selig Donovan wind tunnel tests completed re cently Michael will discussing some important interesting findings raffle annual event has become almost leg endary having large numbers quality prizes such manufacturers Airironics JR Ra dios Sig Beemer RC West American Sail plane Designs Pre-registration required event include yourself fun 1990 fun fly contact Tn-City Soarers 632 Meadows Dr E Richland WA 99352 tel either 1-509/6275224 1-509/525-7066 Flying buddies Ever get feeling plane king hill know slope top bottom Slope ship has hours its extension self Well maybe after reading piece Charlie Morey Slope Soaring News youll put back place much better Theyd fly apartgoing far out toward distant hori zon roust some pigeons phone line send gull scurrying cover beach belowthen charge back over ridge cavort together lift Generally ignored brightly colored Gliders sharing airspace few natural colored planes got attention among gray Cliff Hangar Models F-20 40 Model Aviation Radio Conoi Slope Soaring Mark Triebes 20794 Kreisler Ct Saratoga CA 95070 uoug nerizog snows nis iinouene ana aigger Drainer inc uuIcKsIIver ibis months column looks Silhouette ideal Sailplane small slopes bluffs Hertzog photo Silhouette lightweight agile Slope ship Build light skill itll stay up floaters Lean it will really take off Construction Silhouette very sim ple glass fuselage available serious Sloper Doug Hertzog photo two themperegrine falcons darting diving together over oceanside cliff Point Fermin Only Bennie seemed know much about said must mates since falcons same sex arent partic ularly friendly toward another two seemed enjoy flying much Navy Tom Staggs Aldebaran fly ing wing Despite garnering reputation mad scientist Tom continues experiment variety unique designs major ity being flying wings Photo Tom Staggs Beta Rigel high-speed delta wing Whats wrong plane Apparently Note model rocket engine used Marlah doesnt like fly high-altitude rocket-assisted takeoffs RATO idea sites Dave Kurth takes look prob number Slopers have kicked around lems encountered Mariah Toms first author has seen What enlightens us own unique solu expect Jet pilot Staggs photo tions adapting Glider high altitude Perhaps looked like lunch trespassing bird prey needed inspected sent its way heavy little F-20 no slouch Ill tell right now no match fastest bird world peregrines took interest cruised over just hammerheaded through 100-ft stall turn locked just about foot above tail Okay thought Lets see what comes next put F-20 steep dive bird held its distance exactly tucking its wings slightly match terminal velocity dive Tracking model Jet kid stuff predator snatches its live fast highly-motivatednot-to-become-meals quarry Out air day bottom dive pulled up steep climb No problem falcon extended its wing tips slightly drawn along visible string maintained its 12-in distance Lets see can split-S thought rolled F-20 inverted falcon backed off slightly sizing up situation plane screamed through its downward arc too rolled reattached himself just behind tail little hawk much faster quicker turn ing Glider F-20 tasty would have lunch heard Benriie chuckling behind Hes got servo feather said laughing anxious see what falcon would nexthopefully short snatching Out sky powerful talonsbut appar ently become bored pace flick amazing wings gone search better sport leaving play breeze other earthbound amateurs Anyone has opportunity fly real thing can relate Charlies story Nothing can match grace power skill birds Charlie puts well Going wing-tip-to-wing-tip guys will remind youre nothin pigeon sky Slope Racing tips contest season rap idly approaching heres article will give novice Racers few helpful suggestions will remind expert Racers few basics may have forgotten over time article written Pat Chewning appeared newsletter Portland Area Sailplane Society Dive wind am reminded situa tion occurred Slope Races spring wind exactly perpendicular course made downwind leg very quick upwind leg very slow especially noticeable slower airplanes started think about deal wind like gain best speed through course way visualize problem re alize altitude fuel source want gain fastest speed through course run Out fuel altitude figured would want alter speed leg diving increasing speed upwind leg uses alti tude decreases time spend fighting wind Alternatively would want pull up somewhat downwind leg conserving alti tude spending time wind aid ing course speed developed equation time takes cover distance upwind downwind given windspeed dive angle flying speed developed another equation alti Continued page 143 PILOT GLASSES. HOW VALUABLE IS YOUR EYESIGHT Adjustable side frames free-flaw ventilation Extremely light weight added comfort Blocks harmful " ultraviolet radiation Attractive case included Wraparound frame fits comfortably over prescription glasses tz mist coated far scratch resistance Made entirely Polycarbonate far impact protection ANSI Z871 specifications Available in Clear shop work $1325 Amber overcast days & late afternoons $14~ Gray S14~ & Mirror S19~ sunny days CA Mask $15~ Paint Mask S2O~ member club hit prop blade thrown 60 engine close range tip blade struck Safety Plus glasses saved him serious injury possibly loss eye incident convinced everyone should wear safety glasses near model airplane engines being run upEd Saul Prices include shipping handtingSecretary Treasurer ____________Pikes Peak RC Club FLIEJ5 See hobby dealer first doesnt have what need order direct SAFETY PLUS PO Box 1173 Dept iM Clinton MS 39056 ORDERS ONLY 1-800-842-7233 Cont USI Mississippi 6011924-9640 VISA/MO February 1990 41 SUCKER-KIT$5995 Show & Tell Video . $3995 Add $400 Shipping & handling Ml residents add 4% sales lax 4-5 3100 SASE product list 4 ssamples real wind veneer skins Product List locludes Napless Arrow t Hinges Carbon Tow Mylar Sheet E hTech items 0 Dealer Inquires Welcome ND CHECK OR MONEY ORDER TO PO Box 866 5 OC Lapeer Ml 48446 313 664-3330 composite Aircraft Eng & Supply FAX 664-9780 WILLIAMS ACCESSORIES BROTHERS 4 PILOTS STANDARD TSMAN RACING TARY WHEELS AGE TH CONTOUR BALLOON EN AGE 4 ENGINES PRATT & WHITNEY HT HONE ICKER5 DAU EELLb Radio Technique/Myers Continued page 37 ducts electricity know Think about lead/acid battery car little bit sul phuric acid conducts lot electricity Solar flares nuclear explosions sun emit radio waves goes time atmosphere magnetic field earth protect us effects People Alaska see effects northern lights auro ra borealis Darrel Kline AMA 84898 Out Everett WA sent clipping remind II years solar flare activity sun reaches peak According NOAA National Ocean ographic Atmospheric Administration solar flare activity will peak 1991 can expect will interference complaints sorts RCers 1991 because AMA will sanction use 60 RC channels aircraft Therefore frequency spacing between RC transmitters use will 20 kHz instead 40 kHz tween RC systems now Part complaints will come people clinging outmoded wideband equipment Other complaints will traceable interference commercial transmitters have since 1983 10 kHz away RC channels Whats left may traceable solar flare emis sions may notice glitches People watching TV channels TV2 TV4 TV5 will see ing snowy pictures loss color wavelike interferences crawling over screen what worth could take portable TV field use monitor see above disturbances screen might serve warning fly Scale model have spent year decorating RC channels located frequencywise between broadcast TV channels TV4 TV5 should confused cable chan nels 4 5 Cable TV will affected occasional black outs during year solar flares RC Slope Soaring/Triebes Continued page 41 tude used up given dive angle flying speed Unfortunately have missing equation flying speed function dive angle know increases dive angle assume must determined empirically experiment something can simply calculate So dont have fancy equation prove hypothesis sure seems reasonable Use prestart flight time typical Slope Race period flight time prior start Race often wasted Most people know enough use time gain alti tude Race other uses Fly plane along slope find location best lift could well beyond ends course want spend time gaining altitude lift will also vary distance away face slopefind lift best various alti tudes may notice best lift close hill low altitudes farther hill higher altitudes Use time increase distance hill staying wind flying constantly angled wind stay course follows can gain some dis tance wind can decrease crab angle during Race gain faster time drifting back toward slope wind Great observation hint MT Use prestart time trim aircraft fast flight find much better have air plane trimmed too much down-trim too little way might have put some upstick control speed during race wont have use down-stick less comfortable much less natural Get good start good start Race gives obvious physical advantage real mental boost carries through rest Race As countdown approaches start aircraft should have plenty altitude should well away slope upwind should flying generous amount up-stick conserve altitude com pensate down-trim needed Rac ing approximately 10-second mark plane should crossing starting line op posite direction reference point judging begin run fivesecond mark initiate 1800 turn towards start line turn will cost some time youll make up diving toward start line creasing speed dive should initiated releasing up-stick youve held during altitude-gaining prestart plane will naturally gain speed toward start have seen too pilots waste valuable altitude making enormous dives start gaining tremendous speed burns off about halfway through first leg course Youll want drop Continued page 146 February 1990 143 enough get plane speed will lose one-tenth altitude lap assuming 10-lap speed run want plane cross start just after its announced can adjust timing flying away slope youre too early diving slightly too late better two seconds late start rather early have recross start line judge carefully Turning quality turns greatly af fects time through course AMA task S2 Racing multiple-plane Pylon Racing quality flagger caller have great impact ability make turn proper time Trying anticipate flag usually results missing turn eats up much time can gain correctly antici pating other turns advice anticipate turns early Race prepared turn flagup signal nothing until turn actually called airplane slightly ahead you can use signal anticipate own turn ahead Race should risk missed turn flagger caller consistent last two turns can antic ipated slightly judging time between flag-up turn signal Use ohitude Try adjust angle dive end up proper altitude end Race have found best try adjust trim during Race adjust altitude using either climbing diving turns significant wind component parallel course use climbing turn upwind leg diving turn downwind leg will allow wind help shorten turn upwind side will minimize overshoot downwind side Sometimes obvious slot good air just below top slope has great lift minimal crosswind will have found slot good air during prestart flying should use altitude first few laps speed through course get down slot finish remember nothing magical about top slope might well dive well below final leg fastest finish Fixing Mariah number years ago de signed small aerobatic Slope ship called Mariah appeared construction article pages MA June 1988 issue plan //588 P. 5h.tdg 1/4 Scale Kits $12995 Epoxy/Glass/Foam Construction Drawings Data Formula 120 Pylon Sport Standoff ScaleKit Price ping Credit Cards WelcomedOhio Residents Add 7% since time people have built Sailplane variety results such builder Dave Kurth wrote follow ing article journal Pikes Peak Soar ing Society Spoiler number us club purchased wood build small Sailplane designed Mark Triebes called Mariah plane sup posed fast aerobatic needed light breeze fly few people actually built flew Mariah Last October maiden flight since plane has caused nothing problems As result peo ple did finish building have given up Well may reason start up again first problem severe roll rates due short thin wings ailerons being too sensi tive So made aileron throw very small next problem keeping air took hur ricane-force winds provide sufficient lift problem helped moving center-ofgravity back some distance Being nose-heavy re sulted altitude loss turn Barry made bigger wings lower wing loading helped lot used Sel ig 3021 airfoil stretched wing out 277 made leading edge parallel trailing edge using root rib shape way out tip kept fully sheeted wing added Quabeck tip Since ribs same very easy make result wing about twice area other problem still persisted plane could loop both Barrys Halfway around loop plane would just quit flying tumble aimlessly theory tail too close wings steep angle attack during loop air flowing over wing hitting tail turbulent some way nor mal resulted elevator losing airflow plane losing control conclusion make fuselage longer dis turbed airflow would settle down time met elevator April Slope-bash contest flew Mariab bigger wings crashed first lap totally due error Since crash left fuselage two pieces decided make longer question long no idea decided make educated guess Mark Triebes says plane flies great sea level figured calculate fuse lage length difference between 7000 ft sea level air pressure 7000 ft about 75% sea level So measured fuselage divided 075 decided tail should four inches further back plans specify 146 Model Aviation RC Slope Soaring/Triebes Continued page 143 JjjjJg~jajr2u i ~ WE ARE SHOOTING DOWN HIGH BALSA PRICES WITH SUPER QUALITY Satisfaction Guaranteed Direct Only BALSA SHEETS36 41 30 SALSA SliCKS 3641 1162331161425 3322401 16 3813 182431161214 316244332 1410 4 254332 3812 1 32331332 1216 12033118 1808 116331 49 3119 141116 332344 58 3716 381218 18 35471 4518 121024 31636282 553163161116 14 323 95 61316 381720 516380110316 122230 36 38/6124 7114 141624 12 3 110155I 4 381526 34316019114122130 116454 76 4814343444 332470 94 5614 14055 18 490106 665165162128 316443122 7536 392/37 144114134 8439123246 38 4160225 13936 344255 2 422/26136 15270 12123653 MATCHED SHEETS12 344662 33241001215878 13410859594995 3 6 42034 346790 443 BALSA HOT LINE Call 806 745 6394 10am 6pm Central Time BALSA TRIANQL ES 36 25 9630 35 45 55 BALSA PLANKS 36 90 25 329 4293 11/23302 1 1/2,4396 242231 243335 244476 343515 344716 TAPERED SHEETS36 14265 14395 364268 38346 123120 LONE STAR EPOXY 904L,l.8 35 Sooo598 15,,599 3oooo596 LIGHT 4-6 LB WOOD36 1/32362 1/204362 1/16362 3/32374 1/8381 3/163105 1/443125 3/83160 1/23190 3/443300 143425 1/16498 3/3244118 1/844135 3/1644167 1/444188 3/644285 1/24385 TRAIL INC EDGE 36 14132 51611439 3811246 12270 INSTANT CL UE 1 0 Thck298 1 o 75,296 2, Thck 550 2o /6 556 BASSWOOD41 3/1631626 3/161430 3/163/938 3/161246 3/163460 141442 14 3849 143460 363660 361230 3/63490 121290 1234100 BUNDLE DEALS 20116336 699 20116436 1035 20-332 336 865 15332 436 955 161/6336735 101/6436695 15316336 920 10316436 835 1014336 655 1014436 930 1036336670 53/6 650 51/2336540 51/24361060 10332446 885 518446 500 5316448 600 514 446 645 _________ I * NEW * Hundreds 0 new sizes accessories tinishing materials Send #10 SASE latest catalog SPRUCE STICKS 3641 18181725 18142026 183/62232 3163162638 1/4 143450 1/4 3/840 55 144 12 45 65 3/8 384969 3/812 60 77 1/24 1/26686 12347597 SPRUCE TRIANGLES 36 3/93/647 121264 344 34 LITEPLY48 15x6 18 x 12 14 s6 14612 LONE STAR MODELS cone Handling Charge pay UPS Add $300 COD *400 extra PP APO FPO 1623 57th St Lubbock TX 79412 States accept Visa Mastercard peosonal checks COD65% tax Texas US currency Minimum Wood Order $1000 6Yen HARD MAPLE 1 4438 38 3/8 3612 3834 1 2 42 45 50 56 66 BIRCH 00 WELS36 19 05 316 14 516 38 11 14 2S 32 left fuselage identical plans tween nose rear access hatch F-4 formery point added extra four inches left old F-4 former cause still intact rear made new F 2 F-3 F-4 formers redesigned lengthened fuselage wing located same place tile fuselage same angle incidence ignored extra height fu selage around wing also reinforced fuse lage leading edge wing meets side After getting far add about 06 oz nose get CG 22% old plane bigger wings needed tail weight test flight Sunday August 6 wind I/he north 10 20 mph flew bowl tt3e north side hill road going top hill located al ready plane trimmed gave toss able maintain altitude little diffi culty did have give little down-trim get plane go forward over hill got used flying just doing S-turns noticed ailerons now seemed have too little control cant explain oneit may head After getting comfort able amount altitude attempted loop No problem tried tight loops slow loops no surprises flew inverted few sec onds determined sufficient stick movement actually get plane climb inverted plane no trouble verted got too nervous somehow got right-side-up again problem couldnt snap roll because isnt enough throw ailerons should easy fix So appears four inches fu selage will fix looping problem bigger wings also help although seems plane flies slower will take some flights see performance can improved least last major problem has solved Its just coincidence majority Slopers live fly California coast smooth dense air allows us get away some things cant quite manage say 7000 ft initially designed Man ah no intention being purely sealevel ship because 99% flying California characteristic obviously found its way design have heard quite few people built Mariah no problems stall Slop ers located coast Im glad see Dave didnt give up Mariah able adapt design meet particular flying conditions develop unique personal plane lesson learned bet planes suited fliers small modifications can make otherwise unsuitable design perfect style flying great aspects sport opportunity ex periment something should limited just designers Silhouette Paralleling growth Slope Soaring has development number small model companies feature Slope Glider kits companies Douglas Aircraft back received letter owner operator Douglas Aircraft Doug Hertzog Doug provided some information Slope de signs since time have opportu nity build fly first design Sil houette Silhouette spans 43 uses modified Eppler 374 airfoil wing loading right around 10 oz/sq ft Silhouette ideal slope plane requires two-channel radio mini micro equipment kit includes machine-cut plywood balsa parts foam core wings plans instructions com plete hardware package what Doug has say about Sil houette Silhouette aerobatic Slope Glider de signed specifically speed energy retention maneuverability ship displays very clean handling characteristics both upside-down right-side-up capable outside well inside maneuvers limited imagi nation Its simple fuselage construction balsa-sheeted foam core wing provide less experienced modeler opportunity build superior aircraft minimum ef fort' its small size light weight Sil houette does need lot wind fly right conditions blast fly winds blowing 15 20 mph ifs just begin ning get fun zone small size Silhouette makes ideal smaller slopes bluffs lucky enough have access large slope may find Sil houette just what looking big brother Silhouette Quick silver Doug says Quicksilver due re leased near first year should available time read Quick silver employs modified 8% thickness root Selig 6060 airfoil will easily house fullsized radios 500-mAb battery youd like try out planes yourself check local hobby shop contact February 1990 147 CUSTOM CUT CONTEST BALSA Sheets Piece ed Close Tolerances AAA Grade Dried ped 100% a serious modeler want performance must try 4-6 lb balsa 3 PLYBIRCH 48 1164x12835 132s12475 1I16x12475 118x12496 S FY3WH 48 3132x12700 1/8x12775 3116x12625 114x12625 318x12725 61 1/2x12900 GROG VEDLG MOUNTS 13 Inches 1753834/1940 3503834532140 275I 234/316/45 550 THIRTY-SIXTH ANNUAL RADIO CONTROL EXPOSITION APRIL 6 7 8 1990 FRIDAY9amto6pm SATURDAY9amto6pm SUNDAY9amto43Opm TOLEDO SPORTS ARENA ONE MAIN STREET TOLEDO OHIO TICKETS can purchased door ADVANCE sending self-addressed stamped business size 41/sx91/s envelope TICKETS 38235 Castle Romulus Ml 48174 orders above 10 tickets must include double postage US orders must include 25 cents per order handling charge foreign orders must include 50 cents per order handling charge need send addressed envelope will provide necessary postage NOTE Registered Express Type Mail Orders Will Acceptedll Include check money order US funds made payable Weak Signals R/C Club Ticket prices $400 per day foradultsandSlOOperdayforchildren 12 under Please specify number Deadline ticket orders March 30 1990 sales final non-refundable Hotel info map area may obtained sending stamped self-addressed envelope ticket address above Any other Exposition information avail able contacting Wayne Yeager co director ticket address phone 313 941-6661 Will Have TraditionalSwap Shop Saturday Night Auction COMPETITION CLASSES NON-MILITARY SPORT SCALE PLANE AMA Rules MILITARY SPORT SCALE PLANE AMA Rules PRECISION SCALE PLANE AMA Rules PATTERN PLANE No Jets SPORT MONO-PLANE non-scale models SPORT BI-PLANE non-scale models OLD TIMER FREE FLIGHT R/C ASSIST R/C SAILPLANE non-scale models No Engines HELICOPTER R/C CAR COMPETITION BOAT MILITARY SCALE BOAT PLEASURE POWER BOAT WORKING VESSEL-UNARMED presented Weak Signals R/C Club Toledo Ohio ma maicnea -errormance ystem TOP PERFORMANCE K&B ENGINES MrrlaieMaine K&B FUELS K&B GLOW PLUGS 9 Blends4 Choices Matched Finish System BEST APPEARANCE K&B FIBERGLASS CLOTH K&B Micro-Balloons FILLER K&B SUPER FOXY RESIN K&B SUPER FOXY THINNER K&B SUPER FOXY PRIMER K&B SUPER FOXY PAINT K&B MIXING CUPS Doug directly Douglas Aircraft PO Box 92472 Long Beach CA 90809 phone 1213/498-1737 Mad scientists like tinkering unique innovative designs have developed mad scientist reputation other fliers youre alone have faced kind treatment throughout modeling career have others such experimenter Navy Lt Tom Staggs received fantastic letter Tom detailing work has done fly ing wings Having mechanical engineer ing major college currently flying EA-6Bs Navy Tom has practical knowledge ability come up some very unique interesting ideas fellow mad scientist especially flying wings Tom would like trade ideas failures successes like Heres address Lt Tom Staggs VAQ 129 E/W NAS Whidbey Island Oak Harbor WA 98278-6100 RC Electrics/Kopski Continued page 43 Amptique much better respect kit lacks detailed construction/instruction manual choose go very fineflying models have little no previous build ing experience sure can get some experi enced help construction before start easiest build beginners seem Electra Mirage PT Electric Unlike first planes have extensive highly de tailed highly illustrated instruction booklets such good beginning builders aver age models have generally heavier wing loadings thus fly somewhat fasterbut still make pretty good basic trainers folks think fair say fly easily less easily first three ElectriCUB also falls category being semiscale has others ElectriCUB does fly beautifully trainerslow stable forgivingits too pretty purpose What mean CUB has scale details because somewhat complicated fragile reacts less better bumps often associated training recommend next plane models listed Electra differs its Glider also largest model listed Some folks like idea Sailplane would good choice plane best bunch carrying conventional radiosie standard-size servos turn printer airfoil plotter with.. FOILED AGAIN! llljj AIRFOtLS tN ANY CHORD UP TO 24 INCHES o MODIFY THtCKNESS CAMBER & TRAILING EDGE PLOT SKIN THICKNESS FOR SHEETED WINGS o ENTER DATA EASILY VIA INTELLIGENT EDITOR USER-FRIENDLY MENU-DRIVEN OPERATION INCLUDES 18-PAGE ILLUSTRATED USER MANUAL $3995 as onkn plea ,rios aeaeaioeal bask 8n4fas US$50 npa,ad - pleas asepn& pasasn 1, S,d h,k o,,n .le CYGNET Software 24843 Del Prado #141b Dana Point CA 92629 opposed microservos 500-mAh receiver bat tery packs large receivers excels because its large wing area case always rec ommend using micro-sized radio systems planes excess weight saved about five eight ounces definitely shows up better flight performance lighter model slower can made flya worthy goal beginners Also lighter model longer flight time per charge something else very worthwhile some other trainer models mar ket such Midwest Aero-Lectric Guillow Aeronca Ive included because Ive no personal experience some other Electric kits definitely basic trainers include ElectraStreak Electric Hots Skyvolt Micro Racer Etude Race Rat Wasp name some Now back good instructor get quite few letters wherein guys local club wont help new guy Electric seem several reasons given unfamiliarity motors batteries some earlier bad im pression experience fear Electric con viction Electric dont fly kid perhaps macho trip power club run let offer thought two suggestions thought Chances group rejected didnt have good structor club roster anyway sugges tions See can find someone locally likes experienced Sailplanes OTs lack Electric experience chances theyll good job checking out plane getting air 2 Go back beginning column read about Elec tric Connection service Someday future common reaction local field will some thing like dont fly greasy noisy kid stuff fella' So have thoughts offerings instructors trainers general some Elec tric trainers particular Now some wont have write letters about thats help well Thrust measurements propeller pull seem interest Electric modelers get couple letters year readers se riously pursuit thrust study topic par ticular Ive received several lengthy detailed let ters numerous photographs thrust measure ment data collected homemade test setups readers over country have say some test setup fixtures down right impressive 148 Model Aviation h p
Edition: Model Aviation - 1990/02
Page Numbers: 40, 41, 143, 146, 147, 148
INTERNATIONAL Soaring RC Scale Fun Fly 1990 edition exciting fun fly TnCities WA has slated May 25-27 years fun fly will best yet number activities planned Besides having opportu nity fly ot best slopes country some hangar-flying other Scale en thusiasts heres what have look forward years event Friday night Slope Soaring News will sponsoring catered Washington wine tasting social evening Saturdays docket will include banquet din ner followed guest speaker Michael Selig manufacturer-supported raffle Selig Donovan wind tunnel tests completed re cently Michael will discussing some important interesting findings raffle annual event has become almost leg endary having large numbers quality prizes such manufacturers Airironics JR Ra dios Sig Beemer RC West American Sail plane Designs Pre-registration required event include yourself fun 1990 fun fly contact Tn-City Soarers 632 Meadows Dr E Richland WA 99352 tel either 1-509/6275224 1-509/525-7066 Flying buddies Ever get feeling plane king hill know slope top bottom Slope ship has hours its extension self Well maybe after reading piece Charlie Morey Slope Soaring News youll put back place much better Theyd fly apartgoing far out toward distant hori zon roust some pigeons phone line send gull scurrying cover beach belowthen charge back over ridge cavort together lift Generally ignored brightly colored Gliders sharing airspace few natural colored planes got attention among gray Cliff Hangar Models F-20 40 Model Aviation Radio Conoi Slope Soaring Mark Triebes 20794 Kreisler Ct Saratoga CA 95070 uoug nerizog snows nis iinouene ana aigger Drainer inc uuIcKsIIver ibis months column looks Silhouette ideal Sailplane small slopes bluffs Hertzog photo Silhouette lightweight agile Slope ship Build light skill itll stay up floaters Lean it will really take off Construction Silhouette very sim ple glass fuselage available serious Sloper Doug Hertzog photo two themperegrine falcons darting diving together over oceanside cliff Point Fermin Only Bennie seemed know much about said must mates since falcons same sex arent partic ularly friendly toward another two seemed enjoy flying much Navy Tom Staggs Aldebaran fly ing wing Despite garnering reputation mad scientist Tom continues experiment variety unique designs major ity being flying wings Photo Tom Staggs Beta Rigel high-speed delta wing Whats wrong plane Apparently Note model rocket engine used Marlah doesnt like fly high-altitude rocket-assisted takeoffs RATO idea sites Dave Kurth takes look prob number Slopers have kicked around lems encountered Mariah Toms first author has seen What enlightens us own unique solu expect Jet pilot Staggs photo tions adapting Glider high altitude Perhaps looked like lunch trespassing bird prey needed inspected sent its way heavy little F-20 no slouch Ill tell right now no match fastest bird world peregrines took interest cruised over just hammerheaded through 100-ft stall turn locked just about foot above tail Okay thought Lets see what comes next put F-20 steep dive bird held its distance exactly tucking its wings slightly match terminal velocity dive Tracking model Jet kid stuff predator snatches its live fast highly-motivatednot-to-become-meals quarry Out air day bottom dive pulled up steep climb No problem falcon extended its wing tips slightly drawn along visible string maintained its 12-in distance Lets see can split-S thought rolled F-20 inverted falcon backed off slightly sizing up situation plane screamed through its downward arc too rolled reattached himself just behind tail little hawk much faster quicker turn ing Glider F-20 tasty would have lunch heard Benriie chuckling behind Hes got servo feather said laughing anxious see what falcon would nexthopefully short snatching Out sky powerful talonsbut appar ently become bored pace flick amazing wings gone search better sport leaving play breeze other earthbound amateurs Anyone has opportunity fly real thing can relate Charlies story Nothing can match grace power skill birds Charlie puts well Going wing-tip-to-wing-tip guys will remind youre nothin pigeon sky Slope Racing tips contest season rap idly approaching heres article will give novice Racers few helpful suggestions will remind expert Racers few basics may have forgotten over time article written Pat Chewning appeared newsletter Portland Area Sailplane Society Dive wind am reminded situa tion occurred Slope Races spring wind exactly perpendicular course made downwind leg very quick upwind leg very slow especially noticeable slower airplanes started think about deal wind like gain best speed through course way visualize problem re alize altitude fuel source want gain fastest speed through course run Out fuel altitude figured would want alter speed leg diving increasing speed upwind leg uses alti tude decreases time spend fighting wind Alternatively would want pull up somewhat downwind leg conserving alti tude spending time wind aid ing course speed developed equation time takes cover distance upwind downwind given windspeed dive angle flying speed developed another equation alti Continued page 143 PILOT GLASSES. HOW VALUABLE IS YOUR EYESIGHT Adjustable side frames free-flaw ventilation Extremely light weight added comfort Blocks harmful " ultraviolet radiation Attractive case included Wraparound frame fits comfortably over prescription glasses tz mist coated far scratch resistance Made entirely Polycarbonate far impact protection ANSI Z871 specifications Available in Clear shop work $1325 Amber overcast days & late afternoons $14~ Gray S14~ & Mirror S19~ sunny days CA Mask $15~ Paint Mask S2O~ member club hit prop blade thrown 60 engine close range tip blade struck Safety Plus glasses saved him serious injury possibly loss eye incident convinced everyone should wear safety glasses near model airplane engines being run upEd Saul Prices include shipping handtingSecretary Treasurer ____________Pikes Peak RC Club FLIEJ5 See hobby dealer first doesnt have what need order direct SAFETY PLUS PO Box 1173 Dept iM Clinton MS 39056 ORDERS ONLY 1-800-842-7233 Cont USI Mississippi 6011924-9640 VISA/MO February 1990 41 SUCKER-KIT$5995 Show & Tell Video . $3995 Add $400 Shipping & handling Ml residents add 4% sales lax 4-5 3100 SASE product list 4 ssamples real wind veneer skins Product List locludes Napless Arrow t Hinges Carbon Tow Mylar Sheet E hTech items 0 Dealer Inquires Welcome ND CHECK OR MONEY ORDER TO PO Box 866 5 OC Lapeer Ml 48446 313 664-3330 composite Aircraft Eng & Supply FAX 664-9780 WILLIAMS ACCESSORIES BROTHERS 4 PILOTS STANDARD TSMAN RACING TARY WHEELS AGE TH CONTOUR BALLOON EN AGE 4 ENGINES PRATT & WHITNEY HT HONE ICKER5 DAU EELLb Radio Technique/Myers Continued page 37 ducts electricity know Think about lead/acid battery car little bit sul phuric acid conducts lot electricity Solar flares nuclear explosions sun emit radio waves goes time atmosphere magnetic field earth protect us effects People Alaska see effects northern lights auro ra borealis Darrel Kline AMA 84898 Out Everett WA sent clipping remind II years solar flare activity sun reaches peak According NOAA National Ocean ographic Atmospheric Administration solar flare activity will peak 1991 can expect will interference complaints sorts RCers 1991 because AMA will sanction use 60 RC channels aircraft Therefore frequency spacing between RC transmitters use will 20 kHz instead 40 kHz tween RC systems now Part complaints will come people clinging outmoded wideband equipment Other complaints will traceable interference commercial transmitters have since 1983 10 kHz away RC channels Whats left may traceable solar flare emis sions may notice glitches People watching TV channels TV2 TV4 TV5 will see ing snowy pictures loss color wavelike interferences crawling over screen what worth could take portable TV field use monitor see above disturbances screen might serve warning fly Scale model have spent year decorating RC channels located frequencywise between broadcast TV channels TV4 TV5 should confused cable chan nels 4 5 Cable TV will affected occasional black outs during year solar flares RC Slope Soaring/Triebes Continued page 41 tude used up given dive angle flying speed Unfortunately have missing equation flying speed function dive angle know increases dive angle assume must determined empirically experiment something can simply calculate So dont have fancy equation prove hypothesis sure seems reasonable Use prestart flight time typical Slope Race period flight time prior start Race often wasted Most people know enough use time gain alti tude Race other uses Fly plane along slope find location best lift could well beyond ends course want spend time gaining altitude lift will also vary distance away face slopefind lift best various alti tudes may notice best lift close hill low altitudes farther hill higher altitudes Use time increase distance hill staying wind flying constantly angled wind stay course follows can gain some dis tance wind can decrease crab angle during Race gain faster time drifting back toward slope wind Great observation hint MT Use prestart time trim aircraft fast flight find much better have air plane trimmed too much down-trim too little way might have put some upstick control speed during race wont have use down-stick less comfortable much less natural Get good start good start Race gives obvious physical advantage real mental boost carries through rest Race As countdown approaches start aircraft should have plenty altitude should well away slope upwind should flying generous amount up-stick conserve altitude com pensate down-trim needed Rac ing approximately 10-second mark plane should crossing starting line op posite direction reference point judging begin run fivesecond mark initiate 1800 turn towards start line turn will cost some time youll make up diving toward start line creasing speed dive should initiated releasing up-stick youve held during altitude-gaining prestart plane will naturally gain speed toward start have seen too pilots waste valuable altitude making enormous dives start gaining tremendous speed burns off about halfway through first leg course Youll want drop Continued page 146 February 1990 143 enough get plane speed will lose one-tenth altitude lap assuming 10-lap speed run want plane cross start just after its announced can adjust timing flying away slope youre too early diving slightly too late better two seconds late start rather early have recross start line judge carefully Turning quality turns greatly af fects time through course AMA task S2 Racing multiple-plane Pylon Racing quality flagger caller have great impact ability make turn proper time Trying anticipate flag usually results missing turn eats up much time can gain correctly antici pating other turns advice anticipate turns early Race prepared turn flagup signal nothing until turn actually called airplane slightly ahead you can use signal anticipate own turn ahead Race should risk missed turn flagger caller consistent last two turns can antic ipated slightly judging time between flag-up turn signal Use ohitude Try adjust angle dive end up proper altitude end Race have found best try adjust trim during Race adjust altitude using either climbing diving turns significant wind component parallel course use climbing turn upwind leg diving turn downwind leg will allow wind help shorten turn upwind side will minimize overshoot downwind side Sometimes obvious slot good air just below top slope has great lift minimal crosswind will have found slot good air during prestart flying should use altitude first few laps speed through course get down slot finish remember nothing magical about top slope might well dive well below final leg fastest finish Fixing Mariah number years ago de signed small aerobatic Slope ship called Mariah appeared construction article pages MA June 1988 issue plan //588 P. 5h.tdg 1/4 Scale Kits $12995 Epoxy/Glass/Foam Construction Drawings Data Formula 120 Pylon Sport Standoff ScaleKit Price ping Credit Cards WelcomedOhio Residents Add 7% since time people have built Sailplane variety results such builder Dave Kurth wrote follow ing article journal Pikes Peak Soar ing Society Spoiler number us club purchased wood build small Sailplane designed Mark Triebes called Mariah plane sup posed fast aerobatic needed light breeze fly few people actually built flew Mariah Last October maiden flight since plane has caused nothing problems As result peo ple did finish building have given up Well may reason start up again first problem severe roll rates due short thin wings ailerons being too sensi tive So made aileron throw very small next problem keeping air took hur ricane-force winds provide sufficient lift problem helped moving center-ofgravity back some distance Being nose-heavy re sulted altitude loss turn Barry made bigger wings lower wing loading helped lot used Sel ig 3021 airfoil stretched wing out 277 made leading edge parallel trailing edge using root rib shape way out tip kept fully sheeted wing added Quabeck tip Since ribs same very easy make result wing about twice area other problem still persisted plane could loop both Barrys Halfway around loop plane would just quit flying tumble aimlessly theory tail too close wings steep angle attack during loop air flowing over wing hitting tail turbulent some way nor mal resulted elevator losing airflow plane losing control conclusion make fuselage longer dis turbed airflow would settle down time met elevator April Slope-bash contest flew Mariab bigger wings crashed first lap totally due error Since crash left fuselage two pieces decided make longer question long no idea decided make educated guess Mark Triebes says plane flies great sea level figured calculate fuse lage length difference between 7000 ft sea level air pressure 7000 ft about 75% sea level So measured fuselage divided 075 decided tail should four inches further back plans specify 146 Model Aviation RC Slope Soaring/Triebes Continued page 143 JjjjJg~jajr2u i ~ WE ARE SHOOTING DOWN HIGH BALSA PRICES WITH SUPER QUALITY Satisfaction Guaranteed Direct Only BALSA SHEETS36 41 30 SALSA SliCKS 3641 1162331161425 3322401 16 3813 182431161214 316244332 1410 4 254332 3812 1 32331332 1216 12033118 1808 116331 49 3119 141116 332344 58 3716 381218 18 35471 4518 121024 31636282 553163161116 14 323 95 61316 381720 516380110316 122230 36 38/6124 7114 141624 12 3 110155I 4 381526 34316019114122130 116454 76 4814343444 332470 94 5614 14055 18 490106 665165162128 316443122 7536 392/37 144114134 8439123246 38 4160225 13936 344255 2 422/26136 15270 12123653 MATCHED SHEETS12 344662 33241001215878 13410859594995 3 6 42034 346790 443 BALSA HOT LINE Call 806 745 6394 10am 6pm Central Time BALSA TRIANQL ES 36 25 9630 35 45 55 BALSA PLANKS 36 90 25 329 4293 11/23302 1 1/2,4396 242231 243335 244476 343515 344716 TAPERED SHEETS36 14265 14395 364268 38346 123120 LONE STAR EPOXY 904L,l.8 35 Sooo598 15,,599 3oooo596 LIGHT 4-6 LB WOOD36 1/32362 1/204362 1/16362 3/32374 1/8381 3/163105 1/443125 3/83160 1/23190 3/443300 143425 1/16498 3/3244118 1/844135 3/1644167 1/444188 3/644285 1/24385 TRAIL INC EDGE 36 14132 51611439 3811246 12270 INSTANT CL UE 1 0 Thck298 1 o 75,296 2, Thck 550 2o /6 556 BASSWOOD41 3/1631626 3/161430 3/163/938 3/161246 3/163460 141442 14 3849 143460 363660 361230 3/63490 121290 1234100 BUNDLE DEALS 20116336 699 20116436 1035 20-332 336 865 15332 436 955 161/6336735 101/6436695 15316336 920 10316436 835 1014336 655 1014436 930 1036336670 53/6 650 51/2336540 51/24361060 10332446 885 518446 500 5316448 600 514 446 645 _________ I * NEW * Hundreds 0 new sizes accessories tinishing materials Send #10 SASE latest catalog SPRUCE STICKS 3641 18181725 18142026 183/62232 3163162638 1/4 143450 1/4 3/840 55 144 12 45 65 3/8 384969 3/812 60 77 1/24 1/26686 12347597 SPRUCE TRIANGLES 36 3/93/647 121264 344 34 LITEPLY48 15x6 18 x 12 14 s6 14612 LONE STAR MODELS cone Handling Charge pay UPS Add $300 COD *400 extra PP APO FPO 1623 57th St Lubbock TX 79412 States accept Visa Mastercard peosonal checks COD65% tax Texas US currency Minimum Wood Order $1000 6Yen HARD MAPLE 1 4438 38 3/8 3612 3834 1 2 42 45 50 56 66 BIRCH 00 WELS36 19 05 316 14 516 38 11 14 2S 32 left fuselage identical plans tween nose rear access hatch F-4 formery point added extra four inches left old F-4 former cause still intact rear made new F 2 F-3 F-4 formers redesigned lengthened fuselage wing located same place tile fuselage same angle incidence ignored extra height fu selage around wing also reinforced fuse lage leading edge wing meets side After getting far add about 06 oz nose get CG 22% old plane bigger wings needed tail weight test flight Sunday August 6 wind I/he north 10 20 mph flew bowl tt3e north side hill road going top hill located al ready plane trimmed gave toss able maintain altitude little diffi culty did have give little down-trim get plane go forward over hill got used flying just doing S-turns noticed ailerons now seemed have too little control cant explain oneit may head After getting comfort able amount altitude attempted loop No problem tried tight loops slow loops no surprises flew inverted few sec onds determined sufficient stick movement actually get plane climb inverted plane no trouble verted got too nervous somehow got right-side-up again problem couldnt snap roll because isnt enough throw ailerons should easy fix So appears four inches fu selage will fix looping problem bigger wings also help although seems plane flies slower will take some flights see performance can improved least last major problem has solved Its just coincidence majority Slopers live fly California coast smooth dense air allows us get away some things cant quite manage say 7000 ft initially designed Man ah no intention being purely sealevel ship because 99% flying California characteristic obviously found its way design have heard quite few people built Mariah no problems stall Slop ers located coast Im glad see Dave didnt give up Mariah able adapt design meet particular flying conditions develop unique personal plane lesson learned bet planes suited fliers small modifications can make otherwise unsuitable design perfect style flying great aspects sport opportunity ex periment something should limited just designers Silhouette Paralleling growth Slope Soaring has development number small model companies feature Slope Glider kits companies Douglas Aircraft back received letter owner operator Douglas Aircraft Doug Hertzog Doug provided some information Slope de signs since time have opportu nity build fly first design Sil houette Silhouette spans 43 uses modified Eppler 374 airfoil wing loading right around 10 oz/sq ft Silhouette ideal slope plane requires two-channel radio mini micro equipment kit includes machine-cut plywood balsa parts foam core wings plans instructions com plete hardware package what Doug has say about Sil houette Silhouette aerobatic Slope Glider de signed specifically speed energy retention maneuverability ship displays very clean handling characteristics both upside-down right-side-up capable outside well inside maneuvers limited imagi nation Its simple fuselage construction balsa-sheeted foam core wing provide less experienced modeler opportunity build superior aircraft minimum ef fort' its small size light weight Sil houette does need lot wind fly right conditions blast fly winds blowing 15 20 mph ifs just begin ning get fun zone small size Silhouette makes ideal smaller slopes bluffs lucky enough have access large slope may find Sil houette just what looking big brother Silhouette Quick silver Doug says Quicksilver due re leased near first year should available time read Quick silver employs modified 8% thickness root Selig 6060 airfoil will easily house fullsized radios 500-mAb battery youd like try out planes yourself check local hobby shop contact February 1990 147 CUSTOM CUT CONTEST BALSA Sheets Piece ed Close Tolerances AAA Grade Dried ped 100% a serious modeler want performance must try 4-6 lb balsa 3 PLYBIRCH 48 1164x12835 132s12475 1I16x12475 118x12496 S FY3WH 48 3132x12700 1/8x12775 3116x12625 114x12625 318x12725 61 1/2x12900 GROG VEDLG MOUNTS 13 Inches 1753834/1940 3503834532140 275I 234/316/45 550 THIRTY-SIXTH ANNUAL RADIO CONTROL EXPOSITION APRIL 6 7 8 1990 FRIDAY9amto6pm SATURDAY9amto6pm SUNDAY9amto43Opm TOLEDO SPORTS ARENA ONE MAIN STREET TOLEDO OHIO TICKETS can purchased door ADVANCE sending self-addressed stamped business size 41/sx91/s envelope TICKETS 38235 Castle Romulus Ml 48174 orders above 10 tickets must include double postage US orders must include 25 cents per order handling charge foreign orders must include 50 cents per order handling charge need send addressed envelope will provide necessary postage NOTE Registered Express Type Mail Orders Will Acceptedll Include check money order US funds made payable Weak Signals R/C Club Ticket prices $400 per day foradultsandSlOOperdayforchildren 12 under Please specify number Deadline ticket orders March 30 1990 sales final non-refundable Hotel info map area may obtained sending stamped self-addressed envelope ticket address above Any other Exposition information avail able contacting Wayne Yeager co director ticket address phone 313 941-6661 Will Have TraditionalSwap Shop Saturday Night Auction COMPETITION CLASSES NON-MILITARY SPORT SCALE PLANE AMA Rules MILITARY SPORT SCALE PLANE AMA Rules PRECISION SCALE PLANE AMA Rules PATTERN PLANE No Jets SPORT MONO-PLANE non-scale models SPORT BI-PLANE non-scale models OLD TIMER FREE FLIGHT R/C ASSIST R/C SAILPLANE non-scale models No Engines HELICOPTER R/C CAR COMPETITION BOAT MILITARY SCALE BOAT PLEASURE POWER BOAT WORKING VESSEL-UNARMED presented Weak Signals R/C Club Toledo Ohio ma maicnea -errormance ystem TOP PERFORMANCE K&B ENGINES MrrlaieMaine K&B FUELS K&B GLOW PLUGS 9 Blends4 Choices Matched Finish System BEST APPEARANCE K&B FIBERGLASS CLOTH K&B Micro-Balloons FILLER K&B SUPER FOXY RESIN K&B SUPER FOXY THINNER K&B SUPER FOXY PRIMER K&B SUPER FOXY PAINT K&B MIXING CUPS Doug directly Douglas Aircraft PO Box 92472 Long Beach CA 90809 phone 1213/498-1737 Mad scientists like tinkering unique innovative designs have developed mad scientist reputation other fliers youre alone have faced kind treatment throughout modeling career have others such experimenter Navy Lt Tom Staggs received fantastic letter Tom detailing work has done fly ing wings Having mechanical engineer ing major college currently flying EA-6Bs Navy Tom has practical knowledge ability come up some very unique interesting ideas fellow mad scientist especially flying wings Tom would like trade ideas failures successes like Heres address Lt Tom Staggs VAQ 129 E/W NAS Whidbey Island Oak Harbor WA 98278-6100 RC Electrics/Kopski Continued page 43 Amptique much better respect kit lacks detailed construction/instruction manual choose go very fineflying models have little no previous build ing experience sure can get some experi enced help construction before start easiest build beginners seem Electra Mirage PT Electric Unlike first planes have extensive highly de tailed highly illustrated instruction booklets such good beginning builders aver age models have generally heavier wing loadings thus fly somewhat fasterbut still make pretty good basic trainers folks think fair say fly easily less easily first three ElectriCUB also falls category being semiscale has others ElectriCUB does fly beautifully trainerslow stable forgivingits too pretty purpose What mean CUB has scale details because somewhat complicated fragile reacts less better bumps often associated training recommend next plane models listed Electra differs its Glider also largest model listed Some folks like idea Sailplane would good choice plane best bunch carrying conventional radiosie standard-size servos turn printer airfoil plotter with.. FOILED AGAIN! llljj AIRFOtLS tN ANY CHORD UP TO 24 INCHES o MODIFY THtCKNESS CAMBER & TRAILING EDGE PLOT SKIN THICKNESS FOR SHEETED WINGS o ENTER DATA EASILY VIA INTELLIGENT EDITOR USER-FRIENDLY MENU-DRIVEN OPERATION INCLUDES 18-PAGE ILLUSTRATED USER MANUAL $3995 as onkn plea ,rios aeaeaioeal bask 8n4fas US$50 npa,ad - pleas asepn& pasasn 1, S,d h,k o,,n .le CYGNET Software 24843 Del Prado #141b Dana Point CA 92629 opposed microservos 500-mAh receiver bat tery packs large receivers excels because its large wing area case always rec ommend using micro-sized radio systems planes excess weight saved about five eight ounces definitely shows up better flight performance lighter model slower can made flya worthy goal beginners Also lighter model longer flight time per charge something else very worthwhile some other trainer models mar ket such Midwest Aero-Lectric Guillow Aeronca Ive included because Ive no personal experience some other Electric kits definitely basic trainers include ElectraStreak Electric Hots Skyvolt Micro Racer Etude Race Rat Wasp name some Now back good instructor get quite few letters wherein guys local club wont help new guy Electric seem several reasons given unfamiliarity motors batteries some earlier bad im pression experience fear Electric con viction Electric dont fly kid perhaps macho trip power club run let offer thought two suggestions thought Chances group rejected didnt have good structor club roster anyway sugges tions See can find someone locally likes experienced Sailplanes OTs lack Electric experience chances theyll good job checking out plane getting air 2 Go back beginning column read about Elec tric Connection service Someday future common reaction local field will some thing like dont fly greasy noisy kid stuff fella' So have thoughts offerings instructors trainers general some Elec tric trainers particular Now some wont have write letters about thats help well Thrust measurements propeller pull seem interest Electric modelers get couple letters year readers se riously pursuit thrust study topic par ticular Ive received several lengthy detailed let ters numerous photographs thrust measure ment data collected homemade test setups readers over country have say some test setup fixtures down right impressive 148 Model Aviation h p
Edition: Model Aviation - 1990/02
Page Numbers: 40, 41, 143, 146, 147, 148
INTERNATIONAL Soaring RC Scale Fun Fly 1990 edition exciting fun fly TnCities WA has slated May 25-27 years fun fly will best yet number activities planned Besides having opportu nity fly ot best slopes country some hangar-flying other Scale en thusiasts heres what have look forward years event Friday night Slope Soaring News will sponsoring catered Washington wine tasting social evening Saturdays docket will include banquet din ner followed guest speaker Michael Selig manufacturer-supported raffle Selig Donovan wind tunnel tests completed re cently Michael will discussing some important interesting findings raffle annual event has become almost leg endary having large numbers quality prizes such manufacturers Airironics JR Ra dios Sig Beemer RC West American Sail plane Designs Pre-registration required event include yourself fun 1990 fun fly contact Tn-City Soarers 632 Meadows Dr E Richland WA 99352 tel either 1-509/6275224 1-509/525-7066 Flying buddies Ever get feeling plane king hill know slope top bottom Slope ship has hours its extension self Well maybe after reading piece Charlie Morey Slope Soaring News youll put back place much better Theyd fly apartgoing far out toward distant hori zon roust some pigeons phone line send gull scurrying cover beach belowthen charge back over ridge cavort together lift Generally ignored brightly colored Gliders sharing airspace few natural colored planes got attention among gray Cliff Hangar Models F-20 40 Model Aviation Radio Conoi Slope Soaring Mark Triebes 20794 Kreisler Ct Saratoga CA 95070 uoug nerizog snows nis iinouene ana aigger Drainer inc uuIcKsIIver ibis months column looks Silhouette ideal Sailplane small slopes bluffs Hertzog photo Silhouette lightweight agile Slope ship Build light skill itll stay up floaters Lean it will really take off Construction Silhouette very sim ple glass fuselage available serious Sloper Doug Hertzog photo two themperegrine falcons darting diving together over oceanside cliff Point Fermin Only Bennie seemed know much about said must mates since falcons same sex arent partic ularly friendly toward another two seemed enjoy flying much Navy Tom Staggs Aldebaran fly ing wing Despite garnering reputation mad scientist Tom continues experiment variety unique designs major ity being flying wings Photo Tom Staggs Beta Rigel high-speed delta wing Whats wrong plane Apparently Note model rocket engine used Marlah doesnt like fly high-altitude rocket-assisted takeoffs RATO idea sites Dave Kurth takes look prob number Slopers have kicked around lems encountered Mariah Toms first author has seen What enlightens us own unique solu expect Jet pilot Staggs photo tions adapting Glider high altitude Perhaps looked like lunch trespassing bird prey needed inspected sent its way heavy little F-20 no slouch Ill tell right now no match fastest bird world peregrines took interest cruised over just hammerheaded through 100-ft stall turn locked just about foot above tail Okay thought Lets see what comes next put F-20 steep dive bird held its distance exactly tucking its wings slightly match terminal velocity dive Tracking model Jet kid stuff predator snatches its live fast highly-motivatednot-to-become-meals quarry Out air day bottom dive pulled up steep climb No problem falcon extended its wing tips slightly drawn along visible string maintained its 12-in distance Lets see can split-S thought rolled F-20 inverted falcon backed off slightly sizing up situation plane screamed through its downward arc too rolled reattached himself just behind tail little hawk much faster quicker turn ing Glider F-20 tasty would have lunch heard Benriie chuckling behind Hes got servo feather said laughing anxious see what falcon would nexthopefully short snatching Out sky powerful talonsbut appar ently become bored pace flick amazing wings gone search better sport leaving play breeze other earthbound amateurs Anyone has opportunity fly real thing can relate Charlies story Nothing can match grace power skill birds Charlie puts well Going wing-tip-to-wing-tip guys will remind youre nothin pigeon sky Slope Racing tips contest season rap idly approaching heres article will give novice Racers few helpful suggestions will remind expert Racers few basics may have forgotten over time article written Pat Chewning appeared newsletter Portland Area Sailplane Society Dive wind am reminded situa tion occurred Slope Races spring wind exactly perpendicular course made downwind leg very quick upwind leg very slow especially noticeable slower airplanes started think about deal wind like gain best speed through course way visualize problem re alize altitude fuel source want gain fastest speed through course run Out fuel altitude figured would want alter speed leg diving increasing speed upwind leg uses alti tude decreases time spend fighting wind Alternatively would want pull up somewhat downwind leg conserving alti tude spending time wind aid ing course speed developed equation time takes cover distance upwind downwind given windspeed dive angle flying speed developed another equation alti Continued page 143 PILOT GLASSES. HOW VALUABLE IS YOUR EYESIGHT Adjustable side frames free-flaw ventilation Extremely light weight added comfort Blocks harmful " ultraviolet radiation Attractive case included Wraparound frame fits comfortably over prescription glasses tz mist coated far scratch resistance Made entirely Polycarbonate far impact protection ANSI Z871 specifications Available in Clear shop work $1325 Amber overcast days & late afternoons $14~ Gray S14~ & Mirror S19~ sunny days CA Mask $15~ Paint Mask S2O~ member club hit prop blade thrown 60 engine close range tip blade struck Safety Plus glasses saved him serious injury possibly loss eye incident convinced everyone should wear safety glasses near model airplane engines being run upEd Saul Prices include shipping handtingSecretary Treasurer ____________Pikes Peak RC Club FLIEJ5 See hobby dealer first doesnt have what need order direct SAFETY PLUS PO Box 1173 Dept iM Clinton MS 39056 ORDERS ONLY 1-800-842-7233 Cont USI Mississippi 6011924-9640 VISA/MO February 1990 41 SUCKER-KIT$5995 Show & Tell Video . $3995 Add $400 Shipping & handling Ml residents add 4% sales lax 4-5 3100 SASE product list 4 ssamples real wind veneer skins Product List locludes Napless Arrow t Hinges Carbon Tow Mylar Sheet E hTech items 0 Dealer Inquires Welcome ND CHECK OR MONEY ORDER TO PO Box 866 5 OC Lapeer Ml 48446 313 664-3330 composite Aircraft Eng & Supply FAX 664-9780 WILLIAMS ACCESSORIES BROTHERS 4 PILOTS STANDARD TSMAN RACING TARY WHEELS AGE TH CONTOUR BALLOON EN AGE 4 ENGINES PRATT & WHITNEY HT HONE ICKER5 DAU EELLb Radio Technique/Myers Continued page 37 ducts electricity know Think about lead/acid battery car little bit sul phuric acid conducts lot electricity Solar flares nuclear explosions sun emit radio waves goes time atmosphere magnetic field earth protect us effects People Alaska see effects northern lights auro ra borealis Darrel Kline AMA 84898 Out Everett WA sent clipping remind II years solar flare activity sun reaches peak According NOAA National Ocean ographic Atmospheric Administration solar flare activity will peak 1991 can expect will interference complaints sorts RCers 1991 because AMA will sanction use 60 RC channels aircraft Therefore frequency spacing between RC transmitters use will 20 kHz instead 40 kHz tween RC systems now Part complaints will come people clinging outmoded wideband equipment Other complaints will traceable interference commercial transmitters have since 1983 10 kHz away RC channels Whats left may traceable solar flare emis sions may notice glitches People watching TV channels TV2 TV4 TV5 will see ing snowy pictures loss color wavelike interferences crawling over screen what worth could take portable TV field use monitor see above disturbances screen might serve warning fly Scale model have spent year decorating RC channels located frequencywise between broadcast TV channels TV4 TV5 should confused cable chan nels 4 5 Cable TV will affected occasional black outs during year solar flares RC Slope Soaring/Triebes Continued page 41 tude used up given dive angle flying speed Unfortunately have missing equation flying speed function dive angle know increases dive angle assume must determined empirically experiment something can simply calculate So dont have fancy equation prove hypothesis sure seems reasonable Use prestart flight time typical Slope Race period flight time prior start Race often wasted Most people know enough use time gain alti tude Race other uses Fly plane along slope find location best lift could well beyond ends course want spend time gaining altitude lift will also vary distance away face slopefind lift best various alti tudes may notice best lift close hill low altitudes farther hill higher altitudes Use time increase distance hill staying wind flying constantly angled wind stay course follows can gain some dis tance wind can decrease crab angle during Race gain faster time drifting back toward slope wind Great observation hint MT Use prestart time trim aircraft fast flight find much better have air plane trimmed too much down-trim too little way might have put some upstick control speed during race wont have use down-stick less comfortable much less natural Get good start good start Race gives obvious physical advantage real mental boost carries through rest Race As countdown approaches start aircraft should have plenty altitude should well away slope upwind should flying generous amount up-stick conserve altitude com pensate down-trim needed Rac ing approximately 10-second mark plane should crossing starting line op posite direction reference point judging begin run fivesecond mark initiate 1800 turn towards start line turn will cost some time youll make up diving toward start line creasing speed dive should initiated releasing up-stick youve held during altitude-gaining prestart plane will naturally gain speed toward start have seen too pilots waste valuable altitude making enormous dives start gaining tremendous speed burns off about halfway through first leg course Youll want drop Continued page 146 February 1990 143 enough get plane speed will lose one-tenth altitude lap assuming 10-lap speed run want plane cross start just after its announced can adjust timing flying away slope youre too early diving slightly too late better two seconds late start rather early have recross start line judge carefully Turning quality turns greatly af fects time through course AMA task S2 Racing multiple-plane Pylon Racing quality flagger caller have great impact ability make turn proper time Trying anticipate flag usually results missing turn eats up much time can gain correctly antici pating other turns advice anticipate turns early Race prepared turn flagup signal nothing until turn actually called airplane slightly ahead you can use signal anticipate own turn ahead Race should risk missed turn flagger caller consistent last two turns can antic ipated slightly judging time between flag-up turn signal Use ohitude Try adjust angle dive end up proper altitude end Race have found best try adjust trim during Race adjust altitude using either climbing diving turns significant wind component parallel course use climbing turn upwind leg diving turn downwind leg will allow wind help shorten turn upwind side will minimize overshoot downwind side Sometimes obvious slot good air just below top slope has great lift minimal crosswind will have found slot good air during prestart flying should use altitude first few laps speed through course get down slot finish remember nothing magical about top slope might well dive well below final leg fastest finish Fixing Mariah number years ago de signed small aerobatic Slope ship called Mariah appeared construction article pages MA June 1988 issue plan //588 P. 5h.tdg 1/4 Scale Kits $12995 Epoxy/Glass/Foam Construction Drawings Data Formula 120 Pylon Sport Standoff ScaleKit Price ping Credit Cards WelcomedOhio Residents Add 7% since time people have built Sailplane variety results such builder Dave Kurth wrote follow ing article journal Pikes Peak Soar ing Society Spoiler number us club purchased wood build small Sailplane designed Mark Triebes called Mariah plane sup posed fast aerobatic needed light breeze fly few people actually built flew Mariah Last October maiden flight since plane has caused nothing problems As result peo ple did finish building have given up Well may reason start up again first problem severe roll rates due short thin wings ailerons being too sensi tive So made aileron throw very small next problem keeping air took hur ricane-force winds provide sufficient lift problem helped moving center-ofgravity back some distance Being nose-heavy re sulted altitude loss turn Barry made bigger wings lower wing loading helped lot used Sel ig 3021 airfoil stretched wing out 277 made leading edge parallel trailing edge using root rib shape way out tip kept fully sheeted wing added Quabeck tip Since ribs same very easy make result wing about twice area other problem still persisted plane could loop both Barrys Halfway around loop plane would just quit flying tumble aimlessly theory tail too close wings steep angle attack during loop air flowing over wing hitting tail turbulent some way nor mal resulted elevator losing airflow plane losing control conclusion make fuselage longer dis turbed airflow would settle down time met elevator April Slope-bash contest flew Mariab bigger wings crashed first lap totally due error Since crash left fuselage two pieces decided make longer question long no idea decided make educated guess Mark Triebes says plane flies great sea level figured calculate fuse lage length difference between 7000 ft sea level air pressure 7000 ft about 75% sea level So measured fuselage divided 075 decided tail should four inches further back plans specify 146 Model Aviation RC Slope Soaring/Triebes Continued page 143 JjjjJg~jajr2u i ~ WE ARE SHOOTING DOWN HIGH BALSA PRICES WITH SUPER QUALITY Satisfaction Guaranteed Direct Only BALSA SHEETS36 41 30 SALSA SliCKS 3641 1162331161425 3322401 16 3813 182431161214 316244332 1410 4 254332 3812 1 32331332 1216 12033118 1808 116331 49 3119 141116 332344 58 3716 381218 18 35471 4518 121024 31636282 553163161116 14 323 95 61316 381720 516380110316 122230 36 38/6124 7114 141624 12 3 110155I 4 381526 34316019114122130 116454 76 4814343444 332470 94 5614 14055 18 490106 665165162128 316443122 7536 392/37 144114134 8439123246 38 4160225 13936 344255 2 422/26136 15270 12123653 MATCHED SHEETS12 344662 33241001215878 13410859594995 3 6 42034 346790 443 BALSA HOT LINE Call 806 745 6394 10am 6pm Central Time BALSA TRIANQL ES 36 25 9630 35 45 55 BALSA PLANKS 36 90 25 329 4293 11/23302 1 1/2,4396 242231 243335 244476 343515 344716 TAPERED SHEETS36 14265 14395 364268 38346 123120 LONE STAR EPOXY 904L,l.8 35 Sooo598 15,,599 3oooo596 LIGHT 4-6 LB WOOD36 1/32362 1/204362 1/16362 3/32374 1/8381 3/163105 1/443125 3/83160 1/23190 3/443300 143425 1/16498 3/3244118 1/844135 3/1644167 1/444188 3/644285 1/24385 TRAIL INC EDGE 36 14132 51611439 3811246 12270 INSTANT CL UE 1 0 Thck298 1 o 75,296 2, Thck 550 2o /6 556 BASSWOOD41 3/1631626 3/161430 3/163/938 3/161246 3/163460 141442 14 3849 143460 363660 361230 3/63490 121290 1234100 BUNDLE DEALS 20116336 699 20116436 1035 20-332 336 865 15332 436 955 161/6336735 101/6436695 15316336 920 10316436 835 1014336 655 1014436 930 1036336670 53/6 650 51/2336540 51/24361060 10332446 885 518446 500 5316448 600 514 446 645 _________ I * NEW * Hundreds 0 new sizes accessories tinishing materials Send #10 SASE latest catalog SPRUCE STICKS 3641 18181725 18142026 183/62232 3163162638 1/4 143450 1/4 3/840 55 144 12 45 65 3/8 384969 3/812 60 77 1/24 1/26686 12347597 SPRUCE TRIANGLES 36 3/93/647 121264 344 34 LITEPLY48 15x6 18 x 12 14 s6 14612 LONE STAR MODELS cone Handling Charge pay UPS Add $300 COD *400 extra PP APO FPO 1623 57th St Lubbock TX 79412 States accept Visa Mastercard peosonal checks COD65% tax Texas US currency Minimum Wood Order $1000 6Yen HARD MAPLE 1 4438 38 3/8 3612 3834 1 2 42 45 50 56 66 BIRCH 00 WELS36 19 05 316 14 516 38 11 14 2S 32 left fuselage identical plans tween nose rear access hatch F-4 formery point added extra four inches left old F-4 former cause still intact rear made new F 2 F-3 F-4 formers redesigned lengthened fuselage wing located same place tile fuselage same angle incidence ignored extra height fu selage around wing also reinforced fuse lage leading edge wing meets side After getting far add about 06 oz nose get CG 22% old plane bigger wings needed tail weight test flight Sunday August 6 wind I/he north 10 20 mph flew bowl tt3e north side hill road going top hill located al ready plane trimmed gave toss able maintain altitude little diffi culty did have give little down-trim get plane go forward over hill got used flying just doing S-turns noticed ailerons now seemed have too little control cant explain oneit may head After getting comfort able amount altitude attempted loop No problem tried tight loops slow loops no surprises flew inverted few sec onds determined sufficient stick movement actually get plane climb inverted plane no trouble verted got too nervous somehow got right-side-up again problem couldnt snap roll because isnt enough throw ailerons should easy fix So appears four inches fu selage will fix looping problem bigger wings also help although seems plane flies slower will take some flights see performance can improved least last major problem has solved Its just coincidence majority Slopers live fly California coast smooth dense air allows us get away some things cant quite manage say 7000 ft initially designed Man ah no intention being purely sealevel ship because 99% flying California characteristic obviously found its way design have heard quite few people built Mariah no problems stall Slop ers located coast Im glad see Dave didnt give up Mariah able adapt design meet particular flying conditions develop unique personal plane lesson learned bet planes suited fliers small modifications can make otherwise unsuitable design perfect style flying great aspects sport opportunity ex periment something should limited just designers Silhouette Paralleling growth Slope Soaring has development number small model companies feature Slope Glider kits companies Douglas Aircraft back received letter owner operator Douglas Aircraft Doug Hertzog Doug provided some information Slope de signs since time have opportu nity build fly first design Sil houette Silhouette spans 43 uses modified Eppler 374 airfoil wing loading right around 10 oz/sq ft Silhouette ideal slope plane requires two-channel radio mini micro equipment kit includes machine-cut plywood balsa parts foam core wings plans instructions com plete hardware package what Doug has say about Sil houette Silhouette aerobatic Slope Glider de signed specifically speed energy retention maneuverability ship displays very clean handling characteristics both upside-down right-side-up capable outside well inside maneuvers limited imagi nation Its simple fuselage construction balsa-sheeted foam core wing provide less experienced modeler opportunity build superior aircraft minimum ef fort' its small size light weight Sil houette does need lot wind fly right conditions blast fly winds blowing 15 20 mph ifs just begin ning get fun zone small size Silhouette makes ideal smaller slopes bluffs lucky enough have access large slope may find Sil houette just what looking big brother Silhouette Quick silver Doug says Quicksilver due re leased near first year should available time read Quick silver employs modified 8% thickness root Selig 6060 airfoil will easily house fullsized radios 500-mAb battery youd like try out planes yourself check local hobby shop contact February 1990 147 CUSTOM CUT CONTEST BALSA Sheets Piece ed Close Tolerances AAA Grade Dried ped 100% a serious modeler want performance must try 4-6 lb balsa 3 PLYBIRCH 48 1164x12835 132s12475 1I16x12475 118x12496 S FY3WH 48 3132x12700 1/8x12775 3116x12625 114x12625 318x12725 61 1/2x12900 GROG VEDLG MOUNTS 13 Inches 1753834/1940 3503834532140 275I 234/316/45 550 THIRTY-SIXTH ANNUAL RADIO CONTROL EXPOSITION APRIL 6 7 8 1990 FRIDAY9amto6pm SATURDAY9amto6pm SUNDAY9amto43Opm TOLEDO SPORTS ARENA ONE MAIN STREET TOLEDO OHIO TICKETS can purchased door ADVANCE sending self-addressed stamped business size 41/sx91/s envelope TICKETS 38235 Castle Romulus Ml 48174 orders above 10 tickets must include double postage US orders must include 25 cents per order handling charge foreign orders must include 50 cents per order handling charge need send addressed envelope will provide necessary postage NOTE Registered Express Type Mail Orders Will Acceptedll Include check money order US funds made payable Weak Signals R/C Club Ticket prices $400 per day foradultsandSlOOperdayforchildren 12 under Please specify number Deadline ticket orders March 30 1990 sales final non-refundable Hotel info map area may obtained sending stamped self-addressed envelope ticket address above Any other Exposition information avail able contacting Wayne Yeager co director ticket address phone 313 941-6661 Will Have TraditionalSwap Shop Saturday Night Auction COMPETITION CLASSES NON-MILITARY SPORT SCALE PLANE AMA Rules MILITARY SPORT SCALE PLANE AMA Rules PRECISION SCALE PLANE AMA Rules PATTERN PLANE No Jets SPORT MONO-PLANE non-scale models SPORT BI-PLANE non-scale models OLD TIMER FREE FLIGHT R/C ASSIST R/C SAILPLANE non-scale models No Engines HELICOPTER R/C CAR COMPETITION BOAT MILITARY SCALE BOAT PLEASURE POWER BOAT WORKING VESSEL-UNARMED presented Weak Signals R/C Club Toledo Ohio ma maicnea -errormance ystem TOP PERFORMANCE K&B ENGINES MrrlaieMaine K&B FUELS K&B GLOW PLUGS 9 Blends4 Choices Matched Finish System BEST APPEARANCE K&B FIBERGLASS CLOTH K&B Micro-Balloons FILLER K&B SUPER FOXY RESIN K&B SUPER FOXY THINNER K&B SUPER FOXY PRIMER K&B SUPER FOXY PAINT K&B MIXING CUPS Doug directly Douglas Aircraft PO Box 92472 Long Beach CA 90809 phone 1213/498-1737 Mad scientists like tinkering unique innovative designs have developed mad scientist reputation other fliers youre alone have faced kind treatment throughout modeling career have others such experimenter Navy Lt Tom Staggs received fantastic letter Tom detailing work has done fly ing wings Having mechanical engineer ing major college currently flying EA-6Bs Navy Tom has practical knowledge ability come up some very unique interesting ideas fellow mad scientist especially flying wings Tom would like trade ideas failures successes like Heres address Lt Tom Staggs VAQ 129 E/W NAS Whidbey Island Oak Harbor WA 98278-6100 RC Electrics/Kopski Continued page 43 Amptique much better respect kit lacks detailed construction/instruction manual choose go very fineflying models have little no previous build ing experience sure can get some experi enced help construction before start easiest build beginners seem Electra Mirage PT Electric Unlike first planes have extensive highly de tailed highly illustrated instruction booklets such good beginning builders aver age models have generally heavier wing loadings thus fly somewhat fasterbut still make pretty good basic trainers folks think fair say fly easily less easily first three ElectriCUB also falls category being semiscale has others ElectriCUB does fly beautifully trainerslow stable forgivingits too pretty purpose What mean CUB has scale details because somewhat complicated fragile reacts less better bumps often associated training recommend next plane models listed Electra differs its Glider also largest model listed Some folks like idea Sailplane would good choice plane best bunch carrying conventional radiosie standard-size servos turn printer airfoil plotter with.. FOILED AGAIN! llljj AIRFOtLS tN ANY CHORD UP TO 24 INCHES o MODIFY THtCKNESS CAMBER & TRAILING EDGE PLOT SKIN THICKNESS FOR SHEETED WINGS o ENTER DATA EASILY VIA INTELLIGENT EDITOR USER-FRIENDLY MENU-DRIVEN OPERATION INCLUDES 18-PAGE ILLUSTRATED USER MANUAL $3995 as onkn plea ,rios aeaeaioeal bask 8n4fas US$50 npa,ad - pleas asepn& pasasn 1, S,d h,k o,,n .le CYGNET Software 24843 Del Prado #141b Dana Point CA 92629 opposed microservos 500-mAh receiver bat tery packs large receivers excels because its large wing area case always rec ommend using micro-sized radio systems planes excess weight saved about five eight ounces definitely shows up better flight performance lighter model slower can made flya worthy goal beginners Also lighter model longer flight time per charge something else very worthwhile some other trainer models mar ket such Midwest Aero-Lectric Guillow Aeronca Ive included because Ive no personal experience some other Electric kits definitely basic trainers include ElectraStreak Electric Hots Skyvolt Micro Racer Etude Race Rat Wasp name some Now back good instructor get quite few letters wherein guys local club wont help new guy Electric seem several reasons given unfamiliarity motors batteries some earlier bad im pression experience fear Electric con viction Electric dont fly kid perhaps macho trip power club run let offer thought two suggestions thought Chances group rejected didnt have good structor club roster anyway sugges tions See can find someone locally likes experienced Sailplanes OTs lack Electric experience chances theyll good job checking out plane getting air 2 Go back beginning column read about Elec tric Connection service Someday future common reaction local field will some thing like dont fly greasy noisy kid stuff fella' So have thoughts offerings instructors trainers general some Elec tric trainers particular Now some wont have write letters about thats help well Thrust measurements propeller pull seem interest Electric modelers get couple letters year readers se riously pursuit thrust study topic par ticular Ive received several lengthy detailed let ters numerous photographs thrust measure ment data collected homemade test setups readers over country have say some test setup fixtures down right impressive 148 Model Aviation h p