I RETURNED competitive Free Flight flying 1983 after 18-year layoff quickly found some facts life somehow thought would never occur Item loss skill through inactivity Construction techniques easy second-nature abilities sud denly relearned reacquired Too thumbs elbows persistence practice managed take care shortcom ings passage time disconcerting item two rac ing ahead technology Design building techniques changed considerably Airfoils thinner last Wakefield built early Fifties still 10%-thick airfoil Wings now longer span stabs smaller thinner much lighter biggest mental hurdle presented prop/front-end/power utilization modernday Wakefield Thats learned about Mon treal stops machined front ends neces sity obtaining 100% energy available 40 grams actually 39 grams plus lube rubber introduction Montreal stop equipment led seek out variations could find put within range camera Obvi ously created worldwide could document However close enough sources try determine inventoror least learn important part modern Wakefield came about obvious place start Cana dian acquaintances made Taft CA Unfortu nately young really provide firsthand knowledge names like Haisman Seagrave McGilivary McGlashan Tarnofsky others offered reference Several tele phone conversations letters elicited different answers Actually rea sonable answer proof provided source closer home realized quired several Grey Eagles next Taft 56 Model Aviation Free Flight Duration Sal Fruciano 6146 E Cactus Wren Rd Scottsdale AZ 85253 widely believed very first Montreal stop -type Wakefield front end Loren Salisbury modified free-wheeling Wakefield prop folder added drop-pin stop Photo taken about 1952 unit made sometime earlier discussion text Closeups fuselage details Randy Archers /2A Xenon reveal multifunctilon clockwork timer installation Above empty pressure-bladder-type fuel tank poised below its nest inside rolled-tube fuselage Small coil spring stabilizer hold-down line provides Down elevator bunt maneuver transition glide Aft end fuselage Below L shows elevated stabilizer mount dangling ends VIT DT control lines Aluminumskinned balsa fuselage tube ends adjustable incidence cam Below R VIT Blurry ob jects towards left photo ends glide dethermalizer control lines contest reply always Ask Andy Fay kun searched Out Andy outlined chosen task Andys reply swift positive hesitation also offered provide photographic proof actual first prop unit modified 1952 Loren Salis bury Lorens efforts changed free-wheeler folder added spring-loaded drop-pin mechanism nearly identical units presently used Andy explained Los Angeles Thermal Thumbers very active club Mon treal group Correspondence Barry Hais man editor very fine Montreal Newsletter led publishing idea Apparently Mon treal group saw much advantage droppin system took heart became Montreal stop appears Guido Fea Italy using same system approximately same time see Zaics Yearbook 1955-58 edition page 109 Much has happened original relatively simple design since time notable changes occurred because original mecha nism altered obtain additional functions Mike Seagrave published little piece entitled Autorudder Control Front End Montreal-based Internationalist newsletter about 1957 depicts scheme too much different devices presently use 30 years later Louis Joyners reeent FF Duration effort May 1989 issue provided some detailed pho tos accessories made Poland Among Wakefield front end showed what 35 years evolution improvement can provide am happy report several madein-Poland items now available USA through Starline International 6146 E Cactus Wren Rd Scottsdale AZ 85253 SPZ-1 front end shown has slightly American ized provide fitting 1 /s-in-dia tube Arrivederci Taft some movers shakers West Coast Free Flight circles have way will flying future Western Free Flight meets new field name new real estate Lost Hills aka Antelope Plains about 45-mm drive further north Taft site Walt Ghios Two-Man FAI Challenge first contest held spring Eyewitness re ports indicate worth extra miles field 4 x 7 miles size flat devoid veg etation physical hazards Doug Galbreath re ports almost spot 4 x 7-mile area acceptable flying chasing Motels about nine miles away Some effort being made explore possibility obtaining per manent Free Flight site Change inevitable Kitty Litter facility Taft usually downwind has grown four times its size 10 \N~OLES to___ autorudder 1/ 0fk spring & I piunger LA 7 spinner ltifunction Wakefield front end idea ap peared Mike Seagraves Internationalist newsletter Montreal Canada about 1957 years ago Relations oil company Taft site seem restrictive modeling activity site continues increase have seen used new site have far provided positive response wag combined names given site arrive Lost Planes What need find relatively rich Free Flighter philanthropic bent could purchase long-term-use lease site Such appar ently available moderate hah price Xenon name new series Power mod els designed Randy Archer Starting /2A version Randy breaking away very successful series models based Sat ellite design Xenon provides test bed layout ideas have provided intense efforts FIC competition us have seen Xenon fly agree its outstanding characteristics surpass high-performance AMA planes 288 sq cannot considered big AA weight six ounces 20K-revving TD front Xenon moves skyward rapid rate climbing straight up followed bunt right-circling glide CG location 50% wing chord provides climb stability goes-where-you aim-it variety Some interesting design details include surfaces covered 1-mil clear Mylar Color ing added use broad-tip Magic Marker inside face covering prior its application Mylar adhered framework 3M 77 spray adhesive technique mask off everything except leading trailing edges apply adhe sive problem particular spray adhe sive will become soft under hot condi tions losing its excellent adhering properties Randy simple solution After laying down Mylar sprayed edges trim ming finishing normally would ap plies %-in -wide strip clear MonoKote around perimeter wing forms permanent almost invisible seal covering very light easy apply provides totally moisture-proof envelope structure fuselage single tapered tube wing pylon stab mount rudder epoxied directly surface Randy makes use FiC con struction experience utilizing aluminum/ balsa laminate form fuselage tube Alumi num skin tempered 0009 / balsa sheet cut exact trapezoidal shape required 12-hour epoxy thinned 50/50 applied Continued page 162 September 1989 57 Some goodies available author Frucianos Starline InternatIonal business Above L R Three-function timer Wakefield lighttrimmed essentials weight 16 grams Wakefield Montreal stop front end has superbly crafted prop-folder hinge hub removable adjustable-pitch blade etc Another 3-function timer Below also light weight 16 grams Also available 2- 5-function versions Requires no lubrication Cabin waning slowly reviving growing Catapult Glider pio neered Chicago Aeronuts meets now USIC creating another high-level contest fly Excellent contest management has always hallmark USIC year no ex ception doubtless reasons entry list slowly steadily growing Though meet has subsidized Na tional Free Flight Society general fund gen erosity cannot continue forever would take about 125 entrants annually USIC break Lets get behind best Indoor meet world FF Duration/Fruciano Continued page 57 balsa aluminum carefully centered laminate wrapped around mandrel appropriate shape form tube allowed dry Its light tough requires no further finish Thin-walled surgical tubing used make pressure-bladder tank eas ily inserted tubes cavity major depanure convention de sign application plain V-dihedral competition Power fliers seem have adopted feature V-dihedral Xenon other West Coast ships does its job well perhaps better standard multipanel polyhedral wings Ease construction lighter tal weight since two dihedral joints elimi nated additional efficiency clean un broken spans positive factors asked Whatand name Xe non Randy replied Its gas Seldom has Free Flight modeler dis posal products materials presently avail able him used satisfy ourselves balsa tissue acetate-based cements en gines moderate ability todays modeler pushed maximum find proper applica tion bulletproof fabricsmaterials pound pound stronger steel foams unique strength capabilities cements con tinue improve abilities dry faster can lay parts down assembly Some present-day aeromodelers can re late experience old Rip Van Winkle awoke after 20-year sleep find life around him changed radically present assignments volunteer membership chairman National Free Flight society NFFS Hardly day passes house phone call letter former model builder has decided get back Free Flight realize have ma jor changes begs informa tion will bring him up date position fill fellow Free Flighters am offered excellent vantage point Free Flight growth pattern ad ditions ranks coming former model ers want again RC fliers ready different kind aeromodeling challenge Free Flight alive well perhaps bit different years past still challenge ingenuity skill its practitioners recently chance compare NFFS membership list names par ticipated 88 Lawrenceville IL FF Nats ably organized after FF events AMA Tidewater VA Nats can celled Less 50% participating Lawrenceville NFFS members Cmon fellas know theres no such thing free lunch Tony Ital iano dedicated group formed run Law renceville contest would have happened time read 89 contest will also history However dont embarrassed participated NFFS member matter easily rectified forwarding $15 one-year membership writer name address appear top article Fellow PMAC Phoenix Model Airplane Club member Al Lidbergs prolific workbench contin ues source Free Flight Scale models configurations am sure well acquainted some construc tion articles have appeared MA past must comment upon Als thoroughness aim making faithful good-flying replica full-scale aircraft witness too months ago Al appeared flying field C02-powered Me- 163B Komet Au gust 1988 MA Now constructing Flying Scale model Me-163 would normally give modeler sec ond thoughts especially intended actually fly Als ship same appeared photos construction article complete battle paint flip prop 163B away vertical climb would have rivalled its full-scale ancestor straight up 15 sec followed fast flat glide made wonder 16-in-span model could provide such performance little wing area outstanding demonstration ability Scale models perform well designed flown capable modeler INTRODUCING THE. FLEX-MO UNT FOR 40 AND 60 SIZE ENGINES Reduces Airframe Noise Isolates Engine Vibration Versatile 3 & 4 Hole Mount Universal Mounting System PLANES/ NGS/ 1226 E Ave a-ia Lancaster CA 93535 Available through belier Hobby Shops Dealer ributor Inquiries Invited FLEX MOUNT 60 Accepts Front-tntake 60 Engines toclodes necessary mounting hardware Made USA 162 Model Aviation DODGSu Ut * ThEY KNOW THAT THEY ARE FLYING THE MOST LETHAL MULTITASK THERMAL COMPETITION GLIDER KIT IN THE KNOWN WORLD IT IS TIGHT AND THRILLING SCREAMER ONE MINUTE AND GENTLE SOLID SHIP THAT CAN CLIMB OUT ON THE SLIGHTEST HINT OF LFT THE NEXT MINUTE ** FULL SOPHISTICATED CONTROL FUNCTIONS CAN BE ACIIEVED WITH EVEN SIMPLE 4 CHANNEL RADIO AND YET ThE NEW COMPUTER DRIVEN RADIOS CAN BE USED ALSO ** THIS GLIDER LINE HAS SOMETHING TO CROW ABOUT HAVING INTRODUCED IT WITH THE WINDSONG IN 1982 THE COMPETITION HAS BEEN EATING CROW EVER SINCEI 4 PICTURED DAVE BANKS ONE OF SOARINGS BESTI * Seimd 2 ttmp 10 ow sew catdog * * Ou# Newsletter 8ECO W3 8911 Now Avalebi Pal SI * 2isu uamson Road Bothell WA 98021 206-776-8067 FM-40 FLEX-MO UNt 40 Accepts Front-Intake 25 toSS Engines Includes necessary mounting hardware Lidberg Model Plan Service 614 E Fordham Tempe AZ 85283 continues grow Als cus tomers learn plane list flier Im speaking PMAC pub lishes great newsletter Eight dollars will bring 12 issues year its timely informa tive Heat treating music wire can sometimes solve problems associated bending shapes difficultif impossibleto normal modeling tools music wire use landing gear high-carbon steel has heat treated spring temper very useful us form Spring temper defines hardness mate rial measured would about Rc Rockwell 45 temper steel referred being tough hardness range Rc 20 considered soft Rc 60 hard its tough temper state wire can workednot easily soft can bent cut However sometimes tough state just too tough us work steel easily heat up heats becomes softer its softer state can bend way need Now some parts thats OK landing gear just cant leave such soft state cause very first landing wire would sim ply bend spring back its original posi tion shape So return steel its springy condition must restore specific temper heat treating First heat wire torch until comes bright cherry red color represents temperature about 12000 F quench rapidly cool room-temperature water plunging steel water twisting motion prevent water vapor steam insulating wire coolant action rest water quench thus achieved point wire should very hard probably above Rc 60 test whether attempt file mark superhard area file should slide off cutting steel cuts instead just sliding off ma terial working high-carbon steel case get another piece wire start over because will able add necessary carbon low-carbon steel dont try use wire very hard state because quite brittle will snap off instead flexing next step retempering high-carbon steel wire back its desired hardness shine up steel wool emery cloth heat up gradually using following colors guide As piece heated first color observed will straw 3500 followed dark blue 6000 followed medium blue 75Q0 point remove wire heat source allow cool slowly quench blow Just let sit room temperature away drafts Once steel returns room temperature should target hardness RC45 good spring temper Perform file test again should able make mark now albeit some effort passes test now have tempered wire proper degree Music wire tempered proper state makes great special-purpose cutting tool Instead re heating 7500 stop straw-colored stage will have wire back Rc 60 will still very hard brittle Finally engine maintenance instructor Harron High School New York City Mr Hell weg used say dont learn right Galaxy 8 Computer JR Galaxy 8 POM Computer has user friendly central processing unit state-of-the-art Features include ABC&W 10KHZ narrow band dual conversion receiver 4 JR 4001 servos rechargeable Tx & airborne NiOds NiCd charger complete servo accessories & hardware LCD display servo reverse & subtrims channels dual rates & exponential aileron elevator rudder interference/battery fail safe ATV stop watch count down timer accumulated use timer memory 7 separate aircraft Tx PCMIPPM selectable adjustable stick length swivel antenna direct servo controller trainer system low battery alarm plug RF module RE output meter data reset servo test Special helicopter ACC tail rotor accelerator ATS throttle hold adjustable throttle curves3 adjustable pitch curves4 inverted flight system airplane mode Special aircraft Snap roll2 flaperon differenal aileron v-tail mix elevator-flap mix 4 free mix programs ailable your//IODS local hobby dealer/I7f7fiIC9 Distributed Hobby Dynamics Distributors e 1-800-458-0241 PO Box 3726 Champaign IL 61826-3726 FAX 1-217-355-0058 September 1989 163 Oily Tay Fly Ualaxy youre using well mayas kiss nuts goodbye ZAP LOCKtm ultimate thread-locking compound Works metal wood plastic combination surfaces Available medium blue label high green label strength ZAP THE TOTAL ADHESIVE SYSTEM" Pacer Ted CaIforna USA LARRY JOLLY KITS Now Stock Pantera 100 span Great Contest Plane11995 Cheetah 112 span Aileron Contest Plane16495 Meteor 128 span Open Class Contest Plane13995 Flinger 59 Span great hand launch plane3495 CA Res add 7% Tax $395 S&H 154 Model Aviation wont right may eloquent its surety point anyone has photograph certain rubberpowered model its designer builder Dr Gil B Emdriga 1198 Buford St NW Palm Bay FL 329O7telephone 1-407/727-0683 would like hear entered model contest Clark Air Force Base Philip pines 1953 model lost boom ing thermal Dr Emdriga never took photo noted quite few people attending contest did Maybe people reading column remembers plane follow ing features 36-in wingspan 80% lifting stab rolled-tube balsa fuselage single-bladed folding prop jug-formed blade DT accom plished detaching stab attached model tether autorotated bring model downexcept superthermal milestone sorts will established year August 12-13 Tulsa Glue Dobbers conjunction Wichita Wichihawks spon sors its 40th annual Free Flight contest other clubs can claim have equalled surpassed mark Category III contest site Perry Munici pal Airport located six miles north Perry OK Highway 77 Events scheduled Gas Gas BCD Gas Nostalgia Gas NFFS rules FAt Combo FtA/B/C A-i HandLaunched Glider Mulvihill Rubber Small Field Combo P-30/Electric/Coupe/020 Repli ca/C02 Contest Firectors Jack Hamilton telephone 1-918/665-8371 Jim OReilly telephone 1-316/744-0851 CD Jack Hamilton notes Wichitas SAM group also holding its annual FF contest site same days FF Indoor/Tenny Continued page 58 ada has followed recent series jug props has shared some calculations slightly different area has covered Note charts presented subset data Bill sent deriva tions calculations shown hope present theory future column cause believe will allow easier design specific pitch-distrubution scheme Bills first contribution relates amount camber will produced given prop form Table 1 shows blade camber percentages different blade widths form diameters second contribution Bills work de sign method produces prop close approximation trueor helicalpitch design pitch will appear blade root tip pitch center blade will somewhat higher hub tipso relation center blade both tip hub washed Out somewhat Some designers consider type pitch dis tribution advantageous Tables 2 3 4 show sample parameters various types props Bill has calculated Table 2 assumes preformed blade cut 16-oz plastic beer cup nondrinkers cup has top diameter 3125 bottom diam eter 2625 2875 average exam ple 6-in -dia Bostonian prop blade length 25 places blade root 05-in radius Setup angle refers angle set pitch gage mounting blades Bills de signs setup angle defined center blade segment props Table 2 175 Can angle angular offset blade centerline cut blade out side cup Note calculations also sume blade segment vertically centered side cup Table 3 shows similar data Manhattan Easy B props 14-in dia blade segment lengths 6 Table 4 covers 12 x 22-in Novice Pennyplane prop Setup angle again measured center blade segment setup radius 4 Table 3 35 Table 4 Rear rubber pegs Scale Manhattan Cabin Bostonian Plenny Bates innovative guy willing make measurements during exper unental verification new ideas So Don Lindley suggested hardwood rear motor pegs Scale Manhattan Cabin Bostonian mod els would stronger same weight lighter same strength I/~ aluminum tubing Plenny decided check out tests show given length /16 tubing about 25% heavier standard round toothpick about strength Plenny set up stooge used calibrated tester records force being applied sample breaks toothpick samples supported 1 1 toothpick tested toothpick weighing 0095 grams broke just under 7 lb force weighing 008 grams broke 52 lb very scruffy-looking toothpick weighed 0085 grams broke 28 lb Plenny said last looked bad wouldnt have used 28 lb pull motor made -in rubber would exert during windVINTAQE -C PLAN CONSOLIDATED PBY-5A ~CATALINA 9 FT WING SPAN ALL RIBS B FULL FORMERS SHOWN ON PLANS PLASEIC ENGCOWLS $1090 PR CLEAR GUN BLISTERS $760 PR 4 LARGE PLAN SHEETS s $ 895 6FT WING SPAN MODEL PBY-SA ENGINE COWL5 $Z50 PR Plans $1495 GUN BLISTERS $ 5PR ADO $ OO POSTAGE CATALOGOVER 50 PLANS $ioo DEALERS WRITE WORLDWIDE SID MORGAN 13157 ORMOND BELLEVILLE 48111 USA AFFORDABLE SPEED CONTROLS SIX models speed controls ally proportIonal elltter dlreotlue Also IncOrpOrated stall-sale tImer wtdch shuts down motor event 018 Irons motor receIver receIver hatlery failure AIrplanecompleteAnnambled ModetsParts KItand TeSted EkE24eginosnaso EKE24Lf N/A$4100 EKEF5$4000$5000 esra EKE7R$2500$3100 EkE-7RM$2600$3200 EKEFR$4000$5000 EKEFB$4000$0000 RBV4$1095$1095 RBV4 ON BOARD VOLTMETER assembled anlls cerry fall 50day warranty Please send $200 toe postage handlIng per order Send SASE tsr IntOsnatlon Msll orders ELDEN-KEN ELECTRONICS INC PO Box iaoa Aroada Colorado 60001 call today 1303 4311328 VIsa U.tvad romped p1us 0%
Edition: Model Aviation - 1989/09
Page Numbers: 56, 57, 162, 163, 164
I RETURNED competitive Free Flight flying 1983 after 18-year layoff quickly found some facts life somehow thought would never occur Item loss skill through inactivity Construction techniques easy second-nature abilities sud denly relearned reacquired Too thumbs elbows persistence practice managed take care shortcom ings passage time disconcerting item two rac ing ahead technology Design building techniques changed considerably Airfoils thinner last Wakefield built early Fifties still 10%-thick airfoil Wings now longer span stabs smaller thinner much lighter biggest mental hurdle presented prop/front-end/power utilization modernday Wakefield Thats learned about Mon treal stops machined front ends neces sity obtaining 100% energy available 40 grams actually 39 grams plus lube rubber introduction Montreal stop equipment led seek out variations could find put within range camera Obvi ously created worldwide could document However close enough sources try determine inventoror least learn important part modern Wakefield came about obvious place start Cana dian acquaintances made Taft CA Unfortu nately young really provide firsthand knowledge names like Haisman Seagrave McGilivary McGlashan Tarnofsky others offered reference Several tele phone conversations letters elicited different answers Actually rea sonable answer proof provided source closer home realized quired several Grey Eagles next Taft 56 Model Aviation Free Flight Duration Sal Fruciano 6146 E Cactus Wren Rd Scottsdale AZ 85253 widely believed very first Montreal stop -type Wakefield front end Loren Salisbury modified free-wheeling Wakefield prop folder added drop-pin stop Photo taken about 1952 unit made sometime earlier discussion text Closeups fuselage details Randy Archers /2A Xenon reveal multifunctilon clockwork timer installation Above empty pressure-bladder-type fuel tank poised below its nest inside rolled-tube fuselage Small coil spring stabilizer hold-down line provides Down elevator bunt maneuver transition glide Aft end fuselage Below L shows elevated stabilizer mount dangling ends VIT DT control lines Aluminumskinned balsa fuselage tube ends adjustable incidence cam Below R VIT Blurry ob jects towards left photo ends glide dethermalizer control lines contest reply always Ask Andy Fay kun searched Out Andy outlined chosen task Andys reply swift positive hesitation also offered provide photographic proof actual first prop unit modified 1952 Loren Salis bury Lorens efforts changed free-wheeler folder added spring-loaded drop-pin mechanism nearly identical units presently used Andy explained Los Angeles Thermal Thumbers very active club Mon treal group Correspondence Barry Hais man editor very fine Montreal Newsletter led publishing idea Apparently Mon treal group saw much advantage droppin system took heart became Montreal stop appears Guido Fea Italy using same system approximately same time see Zaics Yearbook 1955-58 edition page 109 Much has happened original relatively simple design since time notable changes occurred because original mecha nism altered obtain additional functions Mike Seagrave published little piece entitled Autorudder Control Front End Montreal-based Internationalist newsletter about 1957 depicts scheme too much different devices presently use 30 years later Louis Joyners reeent FF Duration effort May 1989 issue provided some detailed pho tos accessories made Poland Among Wakefield front end showed what 35 years evolution improvement can provide am happy report several madein-Poland items now available USA through Starline International 6146 E Cactus Wren Rd Scottsdale AZ 85253 SPZ-1 front end shown has slightly American ized provide fitting 1 /s-in-dia tube Arrivederci Taft some movers shakers West Coast Free Flight circles have way will flying future Western Free Flight meets new field name new real estate Lost Hills aka Antelope Plains about 45-mm drive further north Taft site Walt Ghios Two-Man FAI Challenge first contest held spring Eyewitness re ports indicate worth extra miles field 4 x 7 miles size flat devoid veg etation physical hazards Doug Galbreath re ports almost spot 4 x 7-mile area acceptable flying chasing Motels about nine miles away Some effort being made explore possibility obtaining per manent Free Flight site Change inevitable Kitty Litter facility Taft usually downwind has grown four times its size 10 \N~OLES to___ autorudder 1/ 0fk spring & I piunger LA 7 spinner ltifunction Wakefield front end idea ap peared Mike Seagraves Internationalist newsletter Montreal Canada about 1957 years ago Relations oil company Taft site seem restrictive modeling activity site continues increase have seen used new site have far provided positive response wag combined names given site arrive Lost Planes What need find relatively rich Free Flighter philanthropic bent could purchase long-term-use lease site Such appar ently available moderate hah price Xenon name new series Power mod els designed Randy Archer Starting /2A version Randy breaking away very successful series models based Sat ellite design Xenon provides test bed layout ideas have provided intense efforts FIC competition us have seen Xenon fly agree its outstanding characteristics surpass high-performance AMA planes 288 sq cannot considered big AA weight six ounces 20K-revving TD front Xenon moves skyward rapid rate climbing straight up followed bunt right-circling glide CG location 50% wing chord provides climb stability goes-where-you aim-it variety Some interesting design details include surfaces covered 1-mil clear Mylar Color ing added use broad-tip Magic Marker inside face covering prior its application Mylar adhered framework 3M 77 spray adhesive technique mask off everything except leading trailing edges apply adhe sive problem particular spray adhe sive will become soft under hot condi tions losing its excellent adhering properties Randy simple solution After laying down Mylar sprayed edges trim ming finishing normally would ap plies %-in -wide strip clear MonoKote around perimeter wing forms permanent almost invisible seal covering very light easy apply provides totally moisture-proof envelope structure fuselage single tapered tube wing pylon stab mount rudder epoxied directly surface Randy makes use FiC con struction experience utilizing aluminum/ balsa laminate form fuselage tube Alumi num skin tempered 0009 / balsa sheet cut exact trapezoidal shape required 12-hour epoxy thinned 50/50 applied Continued page 162 September 1989 57 Some goodies available author Frucianos Starline InternatIonal business Above L R Three-function timer Wakefield lighttrimmed essentials weight 16 grams Wakefield Montreal stop front end has superbly crafted prop-folder hinge hub removable adjustable-pitch blade etc Another 3-function timer Below also light weight 16 grams Also available 2- 5-function versions Requires no lubrication Cabin waning slowly reviving growing Catapult Glider pio neered Chicago Aeronuts meets now USIC creating another high-level contest fly Excellent contest management has always hallmark USIC year no ex ception doubtless reasons entry list slowly steadily growing Though meet has subsidized Na tional Free Flight Society general fund gen erosity cannot continue forever would take about 125 entrants annually USIC break Lets get behind best Indoor meet world FF Duration/Fruciano Continued page 57 balsa aluminum carefully centered laminate wrapped around mandrel appropriate shape form tube allowed dry Its light tough requires no further finish Thin-walled surgical tubing used make pressure-bladder tank eas ily inserted tubes cavity major depanure convention de sign application plain V-dihedral competition Power fliers seem have adopted feature V-dihedral Xenon other West Coast ships does its job well perhaps better standard multipanel polyhedral wings Ease construction lighter tal weight since two dihedral joints elimi nated additional efficiency clean un broken spans positive factors asked Whatand name Xe non Randy replied Its gas Seldom has Free Flight modeler dis posal products materials presently avail able him used satisfy ourselves balsa tissue acetate-based cements en gines moderate ability todays modeler pushed maximum find proper applica tion bulletproof fabricsmaterials pound pound stronger steel foams unique strength capabilities cements con tinue improve abilities dry faster can lay parts down assembly Some present-day aeromodelers can re late experience old Rip Van Winkle awoke after 20-year sleep find life around him changed radically present assignments volunteer membership chairman National Free Flight society NFFS Hardly day passes house phone call letter former model builder has decided get back Free Flight realize have ma jor changes begs informa tion will bring him up date position fill fellow Free Flighters am offered excellent vantage point Free Flight growth pattern ad ditions ranks coming former model ers want again RC fliers ready different kind aeromodeling challenge Free Flight alive well perhaps bit different years past still challenge ingenuity skill its practitioners recently chance compare NFFS membership list names par ticipated 88 Lawrenceville IL FF Nats ably organized after FF events AMA Tidewater VA Nats can celled Less 50% participating Lawrenceville NFFS members Cmon fellas know theres no such thing free lunch Tony Ital iano dedicated group formed run Law renceville contest would have happened time read 89 contest will also history However dont embarrassed participated NFFS member matter easily rectified forwarding $15 one-year membership writer name address appear top article Fellow PMAC Phoenix Model Airplane Club member Al Lidbergs prolific workbench contin ues source Free Flight Scale models configurations am sure well acquainted some construc tion articles have appeared MA past must comment upon Als thoroughness aim making faithful good-flying replica full-scale aircraft witness too months ago Al appeared flying field C02-powered Me- 163B Komet Au gust 1988 MA Now constructing Flying Scale model Me-163 would normally give modeler sec ond thoughts especially intended actually fly Als ship same appeared photos construction article complete battle paint flip prop 163B away vertical climb would have rivalled its full-scale ancestor straight up 15 sec followed fast flat glide made wonder 16-in-span model could provide such performance little wing area outstanding demonstration ability Scale models perform well designed flown capable modeler INTRODUCING THE. FLEX-MO UNT FOR 40 AND 60 SIZE ENGINES Reduces Airframe Noise Isolates Engine Vibration Versatile 3 & 4 Hole Mount Universal Mounting System PLANES/ NGS/ 1226 E Ave a-ia Lancaster CA 93535 Available through belier Hobby Shops Dealer ributor Inquiries Invited FLEX MOUNT 60 Accepts Front-tntake 60 Engines toclodes necessary mounting hardware Made USA 162 Model Aviation DODGSu Ut * ThEY KNOW THAT THEY ARE FLYING THE MOST LETHAL MULTITASK THERMAL COMPETITION GLIDER KIT IN THE KNOWN WORLD IT IS TIGHT AND THRILLING SCREAMER ONE MINUTE AND GENTLE SOLID SHIP THAT CAN CLIMB OUT ON THE SLIGHTEST HINT OF LFT THE NEXT MINUTE ** FULL SOPHISTICATED CONTROL FUNCTIONS CAN BE ACIIEVED WITH EVEN SIMPLE 4 CHANNEL RADIO AND YET ThE NEW COMPUTER DRIVEN RADIOS CAN BE USED ALSO ** THIS GLIDER LINE HAS SOMETHING TO CROW ABOUT HAVING INTRODUCED IT WITH THE WINDSONG IN 1982 THE COMPETITION HAS BEEN EATING CROW EVER SINCEI 4 PICTURED DAVE BANKS ONE OF SOARINGS BESTI * Seimd 2 ttmp 10 ow sew catdog * * Ou# Newsletter 8ECO W3 8911 Now Avalebi Pal SI * 2isu uamson Road Bothell WA 98021 206-776-8067 FM-40 FLEX-MO UNt 40 Accepts Front-Intake 25 toSS Engines Includes necessary mounting hardware Lidberg Model Plan Service 614 E Fordham Tempe AZ 85283 continues grow Als cus tomers learn plane list flier Im speaking PMAC pub lishes great newsletter Eight dollars will bring 12 issues year its timely informa tive Heat treating music wire can sometimes solve problems associated bending shapes difficultif impossibleto normal modeling tools music wire use landing gear high-carbon steel has heat treated spring temper very useful us form Spring temper defines hardness mate rial measured would about Rc Rockwell 45 temper steel referred being tough hardness range Rc 20 considered soft Rc 60 hard its tough temper state wire can workednot easily soft can bent cut However sometimes tough state just too tough us work steel easily heat up heats becomes softer its softer state can bend way need Now some parts thats OK landing gear just cant leave such soft state cause very first landing wire would sim ply bend spring back its original posi tion shape So return steel its springy condition must restore specific temper heat treating First heat wire torch until comes bright cherry red color represents temperature about 12000 F quench rapidly cool room-temperature water plunging steel water twisting motion prevent water vapor steam insulating wire coolant action rest water quench thus achieved point wire should very hard probably above Rc 60 test whether attempt file mark superhard area file should slide off cutting steel cuts instead just sliding off ma terial working high-carbon steel case get another piece wire start over because will able add necessary carbon low-carbon steel dont try use wire very hard state because quite brittle will snap off instead flexing next step retempering high-carbon steel wire back its desired hardness shine up steel wool emery cloth heat up gradually using following colors guide As piece heated first color observed will straw 3500 followed dark blue 6000 followed medium blue 75Q0 point remove wire heat source allow cool slowly quench blow Just let sit room temperature away drafts Once steel returns room temperature should target hardness RC45 good spring temper Perform file test again should able make mark now albeit some effort passes test now have tempered wire proper degree Music wire tempered proper state makes great special-purpose cutting tool Instead re heating 7500 stop straw-colored stage will have wire back Rc 60 will still very hard brittle Finally engine maintenance instructor Harron High School New York City Mr Hell weg used say dont learn right Galaxy 8 Computer JR Galaxy 8 POM Computer has user friendly central processing unit state-of-the-art Features include ABC&W 10KHZ narrow band dual conversion receiver 4 JR 4001 servos rechargeable Tx & airborne NiOds NiCd charger complete servo accessories & hardware LCD display servo reverse & subtrims channels dual rates & exponential aileron elevator rudder interference/battery fail safe ATV stop watch count down timer accumulated use timer memory 7 separate aircraft Tx PCMIPPM selectable adjustable stick length swivel antenna direct servo controller trainer system low battery alarm plug RF module RE output meter data reset servo test Special helicopter ACC tail rotor accelerator ATS throttle hold adjustable throttle curves3 adjustable pitch curves4 inverted flight system airplane mode Special aircraft Snap roll2 flaperon differenal aileron v-tail mix elevator-flap mix 4 free mix programs ailable your//IODS local hobby dealer/I7f7fiIC9 Distributed Hobby Dynamics Distributors e 1-800-458-0241 PO Box 3726 Champaign IL 61826-3726 FAX 1-217-355-0058 September 1989 163 Oily Tay Fly Ualaxy youre using well mayas kiss nuts goodbye ZAP LOCKtm ultimate thread-locking compound Works metal wood plastic combination surfaces Available medium blue label high green label strength ZAP THE TOTAL ADHESIVE SYSTEM" Pacer Ted CaIforna USA LARRY JOLLY KITS Now Stock Pantera 100 span Great Contest Plane11995 Cheetah 112 span Aileron Contest Plane16495 Meteor 128 span Open Class Contest Plane13995 Flinger 59 Span great hand launch plane3495 CA Res add 7% Tax $395 S&H 154 Model Aviation wont right may eloquent its surety point anyone has photograph certain rubberpowered model its designer builder Dr Gil B Emdriga 1198 Buford St NW Palm Bay FL 329O7telephone 1-407/727-0683 would like hear entered model contest Clark Air Force Base Philip pines 1953 model lost boom ing thermal Dr Emdriga never took photo noted quite few people attending contest did Maybe people reading column remembers plane follow ing features 36-in wingspan 80% lifting stab rolled-tube balsa fuselage single-bladed folding prop jug-formed blade DT accom plished detaching stab attached model tether autorotated bring model downexcept superthermal milestone sorts will established year August 12-13 Tulsa Glue Dobbers conjunction Wichita Wichihawks spon sors its 40th annual Free Flight contest other clubs can claim have equalled surpassed mark Category III contest site Perry Munici pal Airport located six miles north Perry OK Highway 77 Events scheduled Gas Gas BCD Gas Nostalgia Gas NFFS rules FAt Combo FtA/B/C A-i HandLaunched Glider Mulvihill Rubber Small Field Combo P-30/Electric/Coupe/020 Repli ca/C02 Contest Firectors Jack Hamilton telephone 1-918/665-8371 Jim OReilly telephone 1-316/744-0851 CD Jack Hamilton notes Wichitas SAM group also holding its annual FF contest site same days FF Indoor/Tenny Continued page 58 ada has followed recent series jug props has shared some calculations slightly different area has covered Note charts presented subset data Bill sent deriva tions calculations shown hope present theory future column cause believe will allow easier design specific pitch-distrubution scheme Bills first contribution relates amount camber will produced given prop form Table 1 shows blade camber percentages different blade widths form diameters second contribution Bills work de sign method produces prop close approximation trueor helicalpitch design pitch will appear blade root tip pitch center blade will somewhat higher hub tipso relation center blade both tip hub washed Out somewhat Some designers consider type pitch dis tribution advantageous Tables 2 3 4 show sample parameters various types props Bill has calculated Table 2 assumes preformed blade cut 16-oz plastic beer cup nondrinkers cup has top diameter 3125 bottom diam eter 2625 2875 average exam ple 6-in -dia Bostonian prop blade length 25 places blade root 05-in radius Setup angle refers angle set pitch gage mounting blades Bills de signs setup angle defined center blade segment props Table 2 175 Can angle angular offset blade centerline cut blade out side cup Note calculations also sume blade segment vertically centered side cup Table 3 shows similar data Manhattan Easy B props 14-in dia blade segment lengths 6 Table 4 covers 12 x 22-in Novice Pennyplane prop Setup angle again measured center blade segment setup radius 4 Table 3 35 Table 4 Rear rubber pegs Scale Manhattan Cabin Bostonian Plenny Bates innovative guy willing make measurements during exper unental verification new ideas So Don Lindley suggested hardwood rear motor pegs Scale Manhattan Cabin Bostonian mod els would stronger same weight lighter same strength I/~ aluminum tubing Plenny decided check out tests show given length /16 tubing about 25% heavier standard round toothpick about strength Plenny set up stooge used calibrated tester records force being applied sample breaks toothpick samples supported 1 1 toothpick tested toothpick weighing 0095 grams broke just under 7 lb force weighing 008 grams broke 52 lb very scruffy-looking toothpick weighed 0085 grams broke 28 lb Plenny said last looked bad wouldnt have used 28 lb pull motor made -in rubber would exert during windVINTAQE -C PLAN CONSOLIDATED PBY-5A ~CATALINA 9 FT WING SPAN ALL RIBS B FULL FORMERS SHOWN ON PLANS PLASEIC ENGCOWLS $1090 PR CLEAR GUN BLISTERS $760 PR 4 LARGE PLAN SHEETS s $ 895 6FT WING SPAN MODEL PBY-SA ENGINE COWL5 $Z50 PR Plans $1495 GUN BLISTERS $ 5PR ADO $ OO POSTAGE CATALOGOVER 50 PLANS $ioo DEALERS WRITE WORLDWIDE SID MORGAN 13157 ORMOND BELLEVILLE 48111 USA AFFORDABLE SPEED CONTROLS SIX models speed controls ally proportIonal elltter dlreotlue Also IncOrpOrated stall-sale tImer wtdch shuts down motor event 018 Irons motor receIver receIver hatlery failure AIrplanecompleteAnnambled ModetsParts KItand TeSted EkE24eginosnaso EKE24Lf N/A$4100 EKEF5$4000$5000 esra EKE7R$2500$3100 EkE-7RM$2600$3200 EKEFR$4000$5000 EKEFB$4000$0000 RBV4$1095$1095 RBV4 ON BOARD VOLTMETER assembled anlls cerry fall 50day warranty Please send $200 toe postage handlIng per order Send SASE tsr IntOsnatlon Msll orders ELDEN-KEN ELECTRONICS INC PO Box iaoa Aroada Colorado 60001 call today 1303 4311328 VIsa U.tvad romped p1us 0%
Edition: Model Aviation - 1989/09
Page Numbers: 56, 57, 162, 163, 164
I RETURNED competitive Free Flight flying 1983 after 18-year layoff quickly found some facts life somehow thought would never occur Item loss skill through inactivity Construction techniques easy second-nature abilities sud denly relearned reacquired Too thumbs elbows persistence practice managed take care shortcom ings passage time disconcerting item two rac ing ahead technology Design building techniques changed considerably Airfoils thinner last Wakefield built early Fifties still 10%-thick airfoil Wings now longer span stabs smaller thinner much lighter biggest mental hurdle presented prop/front-end/power utilization modernday Wakefield Thats learned about Mon treal stops machined front ends neces sity obtaining 100% energy available 40 grams actually 39 grams plus lube rubber introduction Montreal stop equipment led seek out variations could find put within range camera Obvi ously created worldwide could document However close enough sources try determine inventoror least learn important part modern Wakefield came about obvious place start Cana dian acquaintances made Taft CA Unfortu nately young really provide firsthand knowledge names like Haisman Seagrave McGilivary McGlashan Tarnofsky others offered reference Several tele phone conversations letters elicited different answers Actually rea sonable answer proof provided source closer home realized quired several Grey Eagles next Taft 56 Model Aviation Free Flight Duration Sal Fruciano 6146 E Cactus Wren Rd Scottsdale AZ 85253 widely believed very first Montreal stop -type Wakefield front end Loren Salisbury modified free-wheeling Wakefield prop folder added drop-pin stop Photo taken about 1952 unit made sometime earlier discussion text Closeups fuselage details Randy Archers /2A Xenon reveal multifunctilon clockwork timer installation Above empty pressure-bladder-type fuel tank poised below its nest inside rolled-tube fuselage Small coil spring stabilizer hold-down line provides Down elevator bunt maneuver transition glide Aft end fuselage Below L shows elevated stabilizer mount dangling ends VIT DT control lines Aluminumskinned balsa fuselage tube ends adjustable incidence cam Below R VIT Blurry ob jects towards left photo ends glide dethermalizer control lines contest reply always Ask Andy Fay kun searched Out Andy outlined chosen task Andys reply swift positive hesitation also offered provide photographic proof actual first prop unit modified 1952 Loren Salis bury Lorens efforts changed free-wheeler folder added spring-loaded drop-pin mechanism nearly identical units presently used Andy explained Los Angeles Thermal Thumbers very active club Mon treal group Correspondence Barry Hais man editor very fine Montreal Newsletter led publishing idea Apparently Mon treal group saw much advantage droppin system took heart became Montreal stop appears Guido Fea Italy using same system approximately same time see Zaics Yearbook 1955-58 edition page 109 Much has happened original relatively simple design since time notable changes occurred because original mecha nism altered obtain additional functions Mike Seagrave published little piece entitled Autorudder Control Front End Montreal-based Internationalist newsletter about 1957 depicts scheme too much different devices presently use 30 years later Louis Joyners reeent FF Duration effort May 1989 issue provided some detailed pho tos accessories made Poland Among Wakefield front end showed what 35 years evolution improvement can provide am happy report several madein-Poland items now available USA through Starline International 6146 E Cactus Wren Rd Scottsdale AZ 85253 SPZ-1 front end shown has slightly American ized provide fitting 1 /s-in-dia tube Arrivederci Taft some movers shakers West Coast Free Flight circles have way will flying future Western Free Flight meets new field name new real estate Lost Hills aka Antelope Plains about 45-mm drive further north Taft site Walt Ghios Two-Man FAI Challenge first contest held spring Eyewitness re ports indicate worth extra miles field 4 x 7 miles size flat devoid veg etation physical hazards Doug Galbreath re ports almost spot 4 x 7-mile area acceptable flying chasing Motels about nine miles away Some effort being made explore possibility obtaining per manent Free Flight site Change inevitable Kitty Litter facility Taft usually downwind has grown four times its size 10 \N~OLES to___ autorudder 1/ 0fk spring & I piunger LA 7 spinner ltifunction Wakefield front end idea ap peared Mike Seagraves Internationalist newsletter Montreal Canada about 1957 years ago Relations oil company Taft site seem restrictive modeling activity site continues increase have seen used new site have far provided positive response wag combined names given site arrive Lost Planes What need find relatively rich Free Flighter philanthropic bent could purchase long-term-use lease site Such appar ently available moderate hah price Xenon name new series Power mod els designed Randy Archer Starting /2A version Randy breaking away very successful series models based Sat ellite design Xenon provides test bed layout ideas have provided intense efforts FIC competition us have seen Xenon fly agree its outstanding characteristics surpass high-performance AMA planes 288 sq cannot considered big AA weight six ounces 20K-revving TD front Xenon moves skyward rapid rate climbing straight up followed bunt right-circling glide CG location 50% wing chord provides climb stability goes-where-you aim-it variety Some interesting design details include surfaces covered 1-mil clear Mylar Color ing added use broad-tip Magic Marker inside face covering prior its application Mylar adhered framework 3M 77 spray adhesive technique mask off everything except leading trailing edges apply adhe sive problem particular spray adhe sive will become soft under hot condi tions losing its excellent adhering properties Randy simple solution After laying down Mylar sprayed edges trim ming finishing normally would ap plies %-in -wide strip clear MonoKote around perimeter wing forms permanent almost invisible seal covering very light easy apply provides totally moisture-proof envelope structure fuselage single tapered tube wing pylon stab mount rudder epoxied directly surface Randy makes use FiC con struction experience utilizing aluminum/ balsa laminate form fuselage tube Alumi num skin tempered 0009 / balsa sheet cut exact trapezoidal shape required 12-hour epoxy thinned 50/50 applied Continued page 162 September 1989 57 Some goodies available author Frucianos Starline InternatIonal business Above L R Three-function timer Wakefield lighttrimmed essentials weight 16 grams Wakefield Montreal stop front end has superbly crafted prop-folder hinge hub removable adjustable-pitch blade etc Another 3-function timer Below also light weight 16 grams Also available 2- 5-function versions Requires no lubrication Cabin waning slowly reviving growing Catapult Glider pio neered Chicago Aeronuts meets now USIC creating another high-level contest fly Excellent contest management has always hallmark USIC year no ex ception doubtless reasons entry list slowly steadily growing Though meet has subsidized Na tional Free Flight Society general fund gen erosity cannot continue forever would take about 125 entrants annually USIC break Lets get behind best Indoor meet world FF Duration/Fruciano Continued page 57 balsa aluminum carefully centered laminate wrapped around mandrel appropriate shape form tube allowed dry Its light tough requires no further finish Thin-walled surgical tubing used make pressure-bladder tank eas ily inserted tubes cavity major depanure convention de sign application plain V-dihedral competition Power fliers seem have adopted feature V-dihedral Xenon other West Coast ships does its job well perhaps better standard multipanel polyhedral wings Ease construction lighter tal weight since two dihedral joints elimi nated additional efficiency clean un broken spans positive factors asked Whatand name Xe non Randy replied Its gas Seldom has Free Flight modeler dis posal products materials presently avail able him used satisfy ourselves balsa tissue acetate-based cements en gines moderate ability todays modeler pushed maximum find proper applica tion bulletproof fabricsmaterials pound pound stronger steel foams unique strength capabilities cements con tinue improve abilities dry faster can lay parts down assembly Some present-day aeromodelers can re late experience old Rip Van Winkle awoke after 20-year sleep find life around him changed radically present assignments volunteer membership chairman National Free Flight society NFFS Hardly day passes house phone call letter former model builder has decided get back Free Flight realize have ma jor changes begs informa tion will bring him up date position fill fellow Free Flighters am offered excellent vantage point Free Flight growth pattern ad ditions ranks coming former model ers want again RC fliers ready different kind aeromodeling challenge Free Flight alive well perhaps bit different years past still challenge ingenuity skill its practitioners recently chance compare NFFS membership list names par ticipated 88 Lawrenceville IL FF Nats ably organized after FF events AMA Tidewater VA Nats can celled Less 50% participating Lawrenceville NFFS members Cmon fellas know theres no such thing free lunch Tony Ital iano dedicated group formed run Law renceville contest would have happened time read 89 contest will also history However dont embarrassed participated NFFS member matter easily rectified forwarding $15 one-year membership writer name address appear top article Fellow PMAC Phoenix Model Airplane Club member Al Lidbergs prolific workbench contin ues source Free Flight Scale models configurations am sure well acquainted some construc tion articles have appeared MA past must comment upon Als thoroughness aim making faithful good-flying replica full-scale aircraft witness too months ago Al appeared flying field C02-powered Me- 163B Komet Au gust 1988 MA Now constructing Flying Scale model Me-163 would normally give modeler sec ond thoughts especially intended actually fly Als ship same appeared photos construction article complete battle paint flip prop 163B away vertical climb would have rivalled its full-scale ancestor straight up 15 sec followed fast flat glide made wonder 16-in-span model could provide such performance little wing area outstanding demonstration ability Scale models perform well designed flown capable modeler INTRODUCING THE. FLEX-MO UNT FOR 40 AND 60 SIZE ENGINES Reduces Airframe Noise Isolates Engine Vibration Versatile 3 & 4 Hole Mount Universal Mounting System PLANES/ NGS/ 1226 E Ave a-ia Lancaster CA 93535 Available through belier Hobby Shops Dealer ributor Inquiries Invited FLEX MOUNT 60 Accepts Front-tntake 60 Engines toclodes necessary mounting hardware Made USA 162 Model Aviation DODGSu Ut * ThEY KNOW THAT THEY ARE FLYING THE MOST LETHAL MULTITASK THERMAL COMPETITION GLIDER KIT IN THE KNOWN WORLD IT IS TIGHT AND THRILLING SCREAMER ONE MINUTE AND GENTLE SOLID SHIP THAT CAN CLIMB OUT ON THE SLIGHTEST HINT OF LFT THE NEXT MINUTE ** FULL SOPHISTICATED CONTROL FUNCTIONS CAN BE ACIIEVED WITH EVEN SIMPLE 4 CHANNEL RADIO AND YET ThE NEW COMPUTER DRIVEN RADIOS CAN BE USED ALSO ** THIS GLIDER LINE HAS SOMETHING TO CROW ABOUT HAVING INTRODUCED IT WITH THE WINDSONG IN 1982 THE COMPETITION HAS BEEN EATING CROW EVER SINCEI 4 PICTURED DAVE BANKS ONE OF SOARINGS BESTI * Seimd 2 ttmp 10 ow sew catdog * * Ou# Newsletter 8ECO W3 8911 Now Avalebi Pal SI * 2isu uamson Road Bothell WA 98021 206-776-8067 FM-40 FLEX-MO UNt 40 Accepts Front-Intake 25 toSS Engines Includes necessary mounting hardware Lidberg Model Plan Service 614 E Fordham Tempe AZ 85283 continues grow Als cus tomers learn plane list flier Im speaking PMAC pub lishes great newsletter Eight dollars will bring 12 issues year its timely informa tive Heat treating music wire can sometimes solve problems associated bending shapes difficultif impossibleto normal modeling tools music wire use landing gear high-carbon steel has heat treated spring temper very useful us form Spring temper defines hardness mate rial measured would about Rc Rockwell 45 temper steel referred being tough hardness range Rc 20 considered soft Rc 60 hard its tough temper state wire can workednot easily soft can bent cut However sometimes tough state just too tough us work steel easily heat up heats becomes softer its softer state can bend way need Now some parts thats OK landing gear just cant leave such soft state cause very first landing wire would sim ply bend spring back its original posi tion shape So return steel its springy condition must restore specific temper heat treating First heat wire torch until comes bright cherry red color represents temperature about 12000 F quench rapidly cool room-temperature water plunging steel water twisting motion prevent water vapor steam insulating wire coolant action rest water quench thus achieved point wire should very hard probably above Rc 60 test whether attempt file mark superhard area file should slide off cutting steel cuts instead just sliding off ma terial working high-carbon steel case get another piece wire start over because will able add necessary carbon low-carbon steel dont try use wire very hard state because quite brittle will snap off instead flexing next step retempering high-carbon steel wire back its desired hardness shine up steel wool emery cloth heat up gradually using following colors guide As piece heated first color observed will straw 3500 followed dark blue 6000 followed medium blue 75Q0 point remove wire heat source allow cool slowly quench blow Just let sit room temperature away drafts Once steel returns room temperature should target hardness RC45 good spring temper Perform file test again should able make mark now albeit some effort passes test now have tempered wire proper degree Music wire tempered proper state makes great special-purpose cutting tool Instead re heating 7500 stop straw-colored stage will have wire back Rc 60 will still very hard brittle Finally engine maintenance instructor Harron High School New York City Mr Hell weg used say dont learn right Galaxy 8 Computer JR Galaxy 8 POM Computer has user friendly central processing unit state-of-the-art Features include ABC&W 10KHZ narrow band dual conversion receiver 4 JR 4001 servos rechargeable Tx & airborne NiOds NiCd charger complete servo accessories & hardware LCD display servo reverse & subtrims channels dual rates & exponential aileron elevator rudder interference/battery fail safe ATV stop watch count down timer accumulated use timer memory 7 separate aircraft Tx PCMIPPM selectable adjustable stick length swivel antenna direct servo controller trainer system low battery alarm plug RF module RE output meter data reset servo test Special helicopter ACC tail rotor accelerator ATS throttle hold adjustable throttle curves3 adjustable pitch curves4 inverted flight system airplane mode Special aircraft Snap roll2 flaperon differenal aileron v-tail mix elevator-flap mix 4 free mix programs ailable your//IODS local hobby dealer/I7f7fiIC9 Distributed Hobby Dynamics Distributors e 1-800-458-0241 PO Box 3726 Champaign IL 61826-3726 FAX 1-217-355-0058 September 1989 163 Oily Tay Fly Ualaxy youre using well mayas kiss nuts goodbye ZAP LOCKtm ultimate thread-locking compound Works metal wood plastic combination surfaces Available medium blue label high green label strength ZAP THE TOTAL ADHESIVE SYSTEM" Pacer Ted CaIforna USA LARRY JOLLY KITS Now Stock Pantera 100 span Great Contest Plane11995 Cheetah 112 span Aileron Contest Plane16495 Meteor 128 span Open Class Contest Plane13995 Flinger 59 Span great hand launch plane3495 CA Res add 7% Tax $395 S&H 154 Model Aviation wont right may eloquent its surety point anyone has photograph certain rubberpowered model its designer builder Dr Gil B Emdriga 1198 Buford St NW Palm Bay FL 329O7telephone 1-407/727-0683 would like hear entered model contest Clark Air Force Base Philip pines 1953 model lost boom ing thermal Dr Emdriga never took photo noted quite few people attending contest did Maybe people reading column remembers plane follow ing features 36-in wingspan 80% lifting stab rolled-tube balsa fuselage single-bladed folding prop jug-formed blade DT accom plished detaching stab attached model tether autorotated bring model downexcept superthermal milestone sorts will established year August 12-13 Tulsa Glue Dobbers conjunction Wichita Wichihawks spon sors its 40th annual Free Flight contest other clubs can claim have equalled surpassed mark Category III contest site Perry Munici pal Airport located six miles north Perry OK Highway 77 Events scheduled Gas Gas BCD Gas Nostalgia Gas NFFS rules FAt Combo FtA/B/C A-i HandLaunched Glider Mulvihill Rubber Small Field Combo P-30/Electric/Coupe/020 Repli ca/C02 Contest Firectors Jack Hamilton telephone 1-918/665-8371 Jim OReilly telephone 1-316/744-0851 CD Jack Hamilton notes Wichitas SAM group also holding its annual FF contest site same days FF Indoor/Tenny Continued page 58 ada has followed recent series jug props has shared some calculations slightly different area has covered Note charts presented subset data Bill sent deriva tions calculations shown hope present theory future column cause believe will allow easier design specific pitch-distrubution scheme Bills first contribution relates amount camber will produced given prop form Table 1 shows blade camber percentages different blade widths form diameters second contribution Bills work de sign method produces prop close approximation trueor helicalpitch design pitch will appear blade root tip pitch center blade will somewhat higher hub tipso relation center blade both tip hub washed Out somewhat Some designers consider type pitch dis tribution advantageous Tables 2 3 4 show sample parameters various types props Bill has calculated Table 2 assumes preformed blade cut 16-oz plastic beer cup nondrinkers cup has top diameter 3125 bottom diam eter 2625 2875 average exam ple 6-in -dia Bostonian prop blade length 25 places blade root 05-in radius Setup angle refers angle set pitch gage mounting blades Bills de signs setup angle defined center blade segment props Table 2 175 Can angle angular offset blade centerline cut blade out side cup Note calculations also sume blade segment vertically centered side cup Table 3 shows similar data Manhattan Easy B props 14-in dia blade segment lengths 6 Table 4 covers 12 x 22-in Novice Pennyplane prop Setup angle again measured center blade segment setup radius 4 Table 3 35 Table 4 Rear rubber pegs Scale Manhattan Cabin Bostonian Plenny Bates innovative guy willing make measurements during exper unental verification new ideas So Don Lindley suggested hardwood rear motor pegs Scale Manhattan Cabin Bostonian mod els would stronger same weight lighter same strength I/~ aluminum tubing Plenny decided check out tests show given length /16 tubing about 25% heavier standard round toothpick about strength Plenny set up stooge used calibrated tester records force being applied sample breaks toothpick samples supported 1 1 toothpick tested toothpick weighing 0095 grams broke just under 7 lb force weighing 008 grams broke 52 lb very scruffy-looking toothpick weighed 0085 grams broke 28 lb Plenny said last looked bad wouldnt have used 28 lb pull motor made -in rubber would exert during windVINTAQE -C PLAN CONSOLIDATED PBY-5A ~CATALINA 9 FT WING SPAN ALL RIBS B FULL FORMERS SHOWN ON PLANS PLASEIC ENGCOWLS $1090 PR CLEAR GUN BLISTERS $760 PR 4 LARGE PLAN SHEETS s $ 895 6FT WING SPAN MODEL PBY-SA ENGINE COWL5 $Z50 PR Plans $1495 GUN BLISTERS $ 5PR ADO $ OO POSTAGE CATALOGOVER 50 PLANS $ioo DEALERS WRITE WORLDWIDE SID MORGAN 13157 ORMOND BELLEVILLE 48111 USA AFFORDABLE SPEED CONTROLS SIX models speed controls ally proportIonal elltter dlreotlue Also IncOrpOrated stall-sale tImer wtdch shuts down motor event 018 Irons motor receIver receIver hatlery failure AIrplanecompleteAnnambled ModetsParts KItand TeSted EkE24eginosnaso EKE24Lf N/A$4100 EKEF5$4000$5000 esra EKE7R$2500$3100 EkE-7RM$2600$3200 EKEFR$4000$5000 EKEFB$4000$0000 RBV4$1095$1095 RBV4 ON BOARD VOLTMETER assembled anlls cerry fall 50day warranty Please send $200 toe postage handlIng per order Send SASE tsr IntOsnatlon Msll orders ELDEN-KEN ELECTRONICS INC PO Box iaoa Aroada Colorado 60001 call today 1303 4311328 VIsa U.tvad romped p1us 0%
Edition: Model Aviation - 1989/09
Page Numbers: 56, 57, 162, 163, 164
I RETURNED competitive Free Flight flying 1983 after 18-year layoff quickly found some facts life somehow thought would never occur Item loss skill through inactivity Construction techniques easy second-nature abilities sud denly relearned reacquired Too thumbs elbows persistence practice managed take care shortcom ings passage time disconcerting item two rac ing ahead technology Design building techniques changed considerably Airfoils thinner last Wakefield built early Fifties still 10%-thick airfoil Wings now longer span stabs smaller thinner much lighter biggest mental hurdle presented prop/front-end/power utilization modernday Wakefield Thats learned about Mon treal stops machined front ends neces sity obtaining 100% energy available 40 grams actually 39 grams plus lube rubber introduction Montreal stop equipment led seek out variations could find put within range camera Obvi ously created worldwide could document However close enough sources try determine inventoror least learn important part modern Wakefield came about obvious place start Cana dian acquaintances made Taft CA Unfortu nately young really provide firsthand knowledge names like Haisman Seagrave McGilivary McGlashan Tarnofsky others offered reference Several tele phone conversations letters elicited different answers Actually rea sonable answer proof provided source closer home realized quired several Grey Eagles next Taft 56 Model Aviation Free Flight Duration Sal Fruciano 6146 E Cactus Wren Rd Scottsdale AZ 85253 widely believed very first Montreal stop -type Wakefield front end Loren Salisbury modified free-wheeling Wakefield prop folder added drop-pin stop Photo taken about 1952 unit made sometime earlier discussion text Closeups fuselage details Randy Archers /2A Xenon reveal multifunctilon clockwork timer installation Above empty pressure-bladder-type fuel tank poised below its nest inside rolled-tube fuselage Small coil spring stabilizer hold-down line provides Down elevator bunt maneuver transition glide Aft end fuselage Below L shows elevated stabilizer mount dangling ends VIT DT control lines Aluminumskinned balsa fuselage tube ends adjustable incidence cam Below R VIT Blurry ob jects towards left photo ends glide dethermalizer control lines contest reply always Ask Andy Fay kun searched Out Andy outlined chosen task Andys reply swift positive hesitation also offered provide photographic proof actual first prop unit modified 1952 Loren Salis bury Lorens efforts changed free-wheeler folder added spring-loaded drop-pin mechanism nearly identical units presently used Andy explained Los Angeles Thermal Thumbers very active club Mon treal group Correspondence Barry Hais man editor very fine Montreal Newsletter led publishing idea Apparently Mon treal group saw much advantage droppin system took heart became Montreal stop appears Guido Fea Italy using same system approximately same time see Zaics Yearbook 1955-58 edition page 109 Much has happened original relatively simple design since time notable changes occurred because original mecha nism altered obtain additional functions Mike Seagrave published little piece entitled Autorudder Control Front End Montreal-based Internationalist newsletter about 1957 depicts scheme too much different devices presently use 30 years later Louis Joyners reeent FF Duration effort May 1989 issue provided some detailed pho tos accessories made Poland Among Wakefield front end showed what 35 years evolution improvement can provide am happy report several madein-Poland items now available USA through Starline International 6146 E Cactus Wren Rd Scottsdale AZ 85253 SPZ-1 front end shown has slightly American ized provide fitting 1 /s-in-dia tube Arrivederci Taft some movers shakers West Coast Free Flight circles have way will flying future Western Free Flight meets new field name new real estate Lost Hills aka Antelope Plains about 45-mm drive further north Taft site Walt Ghios Two-Man FAI Challenge first contest held spring Eyewitness re ports indicate worth extra miles field 4 x 7 miles size flat devoid veg etation physical hazards Doug Galbreath re ports almost spot 4 x 7-mile area acceptable flying chasing Motels about nine miles away Some effort being made explore possibility obtaining per manent Free Flight site Change inevitable Kitty Litter facility Taft usually downwind has grown four times its size 10 \N~OLES to___ autorudder 1/ 0fk spring & I piunger LA 7 spinner ltifunction Wakefield front end idea ap peared Mike Seagraves Internationalist newsletter Montreal Canada about 1957 years ago Relations oil company Taft site seem restrictive modeling activity site continues increase have seen used new site have far provided positive response wag combined names given site arrive Lost Planes What need find relatively rich Free Flighter philanthropic bent could purchase long-term-use lease site Such appar ently available moderate hah price Xenon name new series Power mod els designed Randy Archer Starting /2A version Randy breaking away very successful series models based Sat ellite design Xenon provides test bed layout ideas have provided intense efforts FIC competition us have seen Xenon fly agree its outstanding characteristics surpass high-performance AMA planes 288 sq cannot considered big AA weight six ounces 20K-revving TD front Xenon moves skyward rapid rate climbing straight up followed bunt right-circling glide CG location 50% wing chord provides climb stability goes-where-you aim-it variety Some interesting design details include surfaces covered 1-mil clear Mylar Color ing added use broad-tip Magic Marker inside face covering prior its application Mylar adhered framework 3M 77 spray adhesive technique mask off everything except leading trailing edges apply adhe sive problem particular spray adhe sive will become soft under hot condi tions losing its excellent adhering properties Randy simple solution After laying down Mylar sprayed edges trim ming finishing normally would ap plies %-in -wide strip clear MonoKote around perimeter wing forms permanent almost invisible seal covering very light easy apply provides totally moisture-proof envelope structure fuselage single tapered tube wing pylon stab mount rudder epoxied directly surface Randy makes use FiC con struction experience utilizing aluminum/ balsa laminate form fuselage tube Alumi num skin tempered 0009 / balsa sheet cut exact trapezoidal shape required 12-hour epoxy thinned 50/50 applied Continued page 162 September 1989 57 Some goodies available author Frucianos Starline InternatIonal business Above L R Three-function timer Wakefield lighttrimmed essentials weight 16 grams Wakefield Montreal stop front end has superbly crafted prop-folder hinge hub removable adjustable-pitch blade etc Another 3-function timer Below also light weight 16 grams Also available 2- 5-function versions Requires no lubrication Cabin waning slowly reviving growing Catapult Glider pio neered Chicago Aeronuts meets now USIC creating another high-level contest fly Excellent contest management has always hallmark USIC year no ex ception doubtless reasons entry list slowly steadily growing Though meet has subsidized Na tional Free Flight Society general fund gen erosity cannot continue forever would take about 125 entrants annually USIC break Lets get behind best Indoor meet world FF Duration/Fruciano Continued page 57 balsa aluminum carefully centered laminate wrapped around mandrel appropriate shape form tube allowed dry Its light tough requires no further finish Thin-walled surgical tubing used make pressure-bladder tank eas ily inserted tubes cavity major depanure convention de sign application plain V-dihedral competition Power fliers seem have adopted feature V-dihedral Xenon other West Coast ships does its job well perhaps better standard multipanel polyhedral wings Ease construction lighter tal weight since two dihedral joints elimi nated additional efficiency clean un broken spans positive factors asked Whatand name Xe non Randy replied Its gas Seldom has Free Flight modeler dis posal products materials presently avail able him used satisfy ourselves balsa tissue acetate-based cements en gines moderate ability todays modeler pushed maximum find proper applica tion bulletproof fabricsmaterials pound pound stronger steel foams unique strength capabilities cements con tinue improve abilities dry faster can lay parts down assembly Some present-day aeromodelers can re late experience old Rip Van Winkle awoke after 20-year sleep find life around him changed radically present assignments volunteer membership chairman National Free Flight society NFFS Hardly day passes house phone call letter former model builder has decided get back Free Flight realize have ma jor changes begs informa tion will bring him up date position fill fellow Free Flighters am offered excellent vantage point Free Flight growth pattern ad ditions ranks coming former model ers want again RC fliers ready different kind aeromodeling challenge Free Flight alive well perhaps bit different years past still challenge ingenuity skill its practitioners recently chance compare NFFS membership list names par ticipated 88 Lawrenceville IL FF Nats ably organized after FF events AMA Tidewater VA Nats can celled Less 50% participating Lawrenceville NFFS members Cmon fellas know theres no such thing free lunch Tony Ital iano dedicated group formed run Law renceville contest would have happened time read 89 contest will also history However dont embarrassed participated NFFS member matter easily rectified forwarding $15 one-year membership writer name address appear top article Fellow PMAC Phoenix Model Airplane Club member Al Lidbergs prolific workbench contin ues source Free Flight Scale models configurations am sure well acquainted some construc tion articles have appeared MA past must comment upon Als thoroughness aim making faithful good-flying replica full-scale aircraft witness too months ago Al appeared flying field C02-powered Me- 163B Komet Au gust 1988 MA Now constructing Flying Scale model Me-163 would normally give modeler sec ond thoughts especially intended actually fly Als ship same appeared photos construction article complete battle paint flip prop 163B away vertical climb would have rivalled its full-scale ancestor straight up 15 sec followed fast flat glide made wonder 16-in-span model could provide such performance little wing area outstanding demonstration ability Scale models perform well designed flown capable modeler INTRODUCING THE. FLEX-MO UNT FOR 40 AND 60 SIZE ENGINES Reduces Airframe Noise Isolates Engine Vibration Versatile 3 & 4 Hole Mount Universal Mounting System PLANES/ NGS/ 1226 E Ave a-ia Lancaster CA 93535 Available through belier Hobby Shops Dealer ributor Inquiries Invited FLEX MOUNT 60 Accepts Front-tntake 60 Engines toclodes necessary mounting hardware Made USA 162 Model Aviation DODGSu Ut * ThEY KNOW THAT THEY ARE FLYING THE MOST LETHAL MULTITASK THERMAL COMPETITION GLIDER KIT IN THE KNOWN WORLD IT IS TIGHT AND THRILLING SCREAMER ONE MINUTE AND GENTLE SOLID SHIP THAT CAN CLIMB OUT ON THE SLIGHTEST HINT OF LFT THE NEXT MINUTE ** FULL SOPHISTICATED CONTROL FUNCTIONS CAN BE ACIIEVED WITH EVEN SIMPLE 4 CHANNEL RADIO AND YET ThE NEW COMPUTER DRIVEN RADIOS CAN BE USED ALSO ** THIS GLIDER LINE HAS SOMETHING TO CROW ABOUT HAVING INTRODUCED IT WITH THE WINDSONG IN 1982 THE COMPETITION HAS BEEN EATING CROW EVER SINCEI 4 PICTURED DAVE BANKS ONE OF SOARINGS BESTI * Seimd 2 ttmp 10 ow sew catdog * * Ou# Newsletter 8ECO W3 8911 Now Avalebi Pal SI * 2isu uamson Road Bothell WA 98021 206-776-8067 FM-40 FLEX-MO UNt 40 Accepts Front-Intake 25 toSS Engines Includes necessary mounting hardware Lidberg Model Plan Service 614 E Fordham Tempe AZ 85283 continues grow Als cus tomers learn plane list flier Im speaking PMAC pub lishes great newsletter Eight dollars will bring 12 issues year its timely informa tive Heat treating music wire can sometimes solve problems associated bending shapes difficultif impossibleto normal modeling tools music wire use landing gear high-carbon steel has heat treated spring temper very useful us form Spring temper defines hardness mate rial measured would about Rc Rockwell 45 temper steel referred being tough hardness range Rc 20 considered soft Rc 60 hard its tough temper state wire can workednot easily soft can bent cut However sometimes tough state just too tough us work steel easily heat up heats becomes softer its softer state can bend way need Now some parts thats OK landing gear just cant leave such soft state cause very first landing wire would sim ply bend spring back its original posi tion shape So return steel its springy condition must restore specific temper heat treating First heat wire torch until comes bright cherry red color represents temperature about 12000 F quench rapidly cool room-temperature water plunging steel water twisting motion prevent water vapor steam insulating wire coolant action rest water quench thus achieved point wire should very hard probably above Rc 60 test whether attempt file mark superhard area file should slide off cutting steel cuts instead just sliding off ma terial working high-carbon steel case get another piece wire start over because will able add necessary carbon low-carbon steel dont try use wire very hard state because quite brittle will snap off instead flexing next step retempering high-carbon steel wire back its desired hardness shine up steel wool emery cloth heat up gradually using following colors guide As piece heated first color observed will straw 3500 followed dark blue 6000 followed medium blue 75Q0 point remove wire heat source allow cool slowly quench blow Just let sit room temperature away drafts Once steel returns room temperature should target hardness RC45 good spring temper Perform file test again should able make mark now albeit some effort passes test now have tempered wire proper degree Music wire tempered proper state makes great special-purpose cutting tool Instead re heating 7500 stop straw-colored stage will have wire back Rc 60 will still very hard brittle Finally engine maintenance instructor Harron High School New York City Mr Hell weg used say dont learn right Galaxy 8 Computer JR Galaxy 8 POM Computer has user friendly central processing unit state-of-the-art Features include ABC&W 10KHZ narrow band dual conversion receiver 4 JR 4001 servos rechargeable Tx & airborne NiOds NiCd charger complete servo accessories & hardware LCD display servo reverse & subtrims channels dual rates & exponential aileron elevator rudder interference/battery fail safe ATV stop watch count down timer accumulated use timer memory 7 separate aircraft Tx PCMIPPM selectable adjustable stick length swivel antenna direct servo controller trainer system low battery alarm plug RF module RE output meter data reset servo test Special helicopter ACC tail rotor accelerator ATS throttle hold adjustable throttle curves3 adjustable pitch curves4 inverted flight system airplane mode Special aircraft Snap roll2 flaperon differenal aileron v-tail mix elevator-flap mix 4 free mix programs ailable your//IODS local hobby dealer/I7f7fiIC9 Distributed Hobby Dynamics Distributors e 1-800-458-0241 PO Box 3726 Champaign IL 61826-3726 FAX 1-217-355-0058 September 1989 163 Oily Tay Fly Ualaxy youre using well mayas kiss nuts goodbye ZAP LOCKtm ultimate thread-locking compound Works metal wood plastic combination surfaces Available medium blue label high green label strength ZAP THE TOTAL ADHESIVE SYSTEM" Pacer Ted CaIforna USA LARRY JOLLY KITS Now Stock Pantera 100 span Great Contest Plane11995 Cheetah 112 span Aileron Contest Plane16495 Meteor 128 span Open Class Contest Plane13995 Flinger 59 Span great hand launch plane3495 CA Res add 7% Tax $395 S&H 154 Model Aviation wont right may eloquent its surety point anyone has photograph certain rubberpowered model its designer builder Dr Gil B Emdriga 1198 Buford St NW Palm Bay FL 329O7telephone 1-407/727-0683 would like hear entered model contest Clark Air Force Base Philip pines 1953 model lost boom ing thermal Dr Emdriga never took photo noted quite few people attending contest did Maybe people reading column remembers plane follow ing features 36-in wingspan 80% lifting stab rolled-tube balsa fuselage single-bladed folding prop jug-formed blade DT accom plished detaching stab attached model tether autorotated bring model downexcept superthermal milestone sorts will established year August 12-13 Tulsa Glue Dobbers conjunction Wichita Wichihawks spon sors its 40th annual Free Flight contest other clubs can claim have equalled surpassed mark Category III contest site Perry Munici pal Airport located six miles north Perry OK Highway 77 Events scheduled Gas Gas BCD Gas Nostalgia Gas NFFS rules FAt Combo FtA/B/C A-i HandLaunched Glider Mulvihill Rubber Small Field Combo P-30/Electric/Coupe/020 Repli ca/C02 Contest Firectors Jack Hamilton telephone 1-918/665-8371 Jim OReilly telephone 1-316/744-0851 CD Jack Hamilton notes Wichitas SAM group also holding its annual FF contest site same days FF Indoor/Tenny Continued page 58 ada has followed recent series jug props has shared some calculations slightly different area has covered Note charts presented subset data Bill sent deriva tions calculations shown hope present theory future column cause believe will allow easier design specific pitch-distrubution scheme Bills first contribution relates amount camber will produced given prop form Table 1 shows blade camber percentages different blade widths form diameters second contribution Bills work de sign method produces prop close approximation trueor helicalpitch design pitch will appear blade root tip pitch center blade will somewhat higher hub tipso relation center blade both tip hub washed Out somewhat Some designers consider type pitch dis tribution advantageous Tables 2 3 4 show sample parameters various types props Bill has calculated Table 2 assumes preformed blade cut 16-oz plastic beer cup nondrinkers cup has top diameter 3125 bottom diam eter 2625 2875 average exam ple 6-in -dia Bostonian prop blade length 25 places blade root 05-in radius Setup angle refers angle set pitch gage mounting blades Bills de signs setup angle defined center blade segment props Table 2 175 Can angle angular offset blade centerline cut blade out side cup Note calculations also sume blade segment vertically centered side cup Table 3 shows similar data Manhattan Easy B props 14-in dia blade segment lengths 6 Table 4 covers 12 x 22-in Novice Pennyplane prop Setup angle again measured center blade segment setup radius 4 Table 3 35 Table 4 Rear rubber pegs Scale Manhattan Cabin Bostonian Plenny Bates innovative guy willing make measurements during exper unental verification new ideas So Don Lindley suggested hardwood rear motor pegs Scale Manhattan Cabin Bostonian mod els would stronger same weight lighter same strength I/~ aluminum tubing Plenny decided check out tests show given length /16 tubing about 25% heavier standard round toothpick about strength Plenny set up stooge used calibrated tester records force being applied sample breaks toothpick samples supported 1 1 toothpick tested toothpick weighing 0095 grams broke just under 7 lb force weighing 008 grams broke 52 lb very scruffy-looking toothpick weighed 0085 grams broke 28 lb Plenny said last looked bad wouldnt have used 28 lb pull motor made -in rubber would exert during windVINTAQE -C PLAN CONSOLIDATED PBY-5A ~CATALINA 9 FT WING SPAN ALL RIBS B FULL FORMERS SHOWN ON PLANS PLASEIC ENGCOWLS $1090 PR CLEAR GUN BLISTERS $760 PR 4 LARGE PLAN SHEETS s $ 895 6FT WING SPAN MODEL PBY-SA ENGINE COWL5 $Z50 PR Plans $1495 GUN BLISTERS $ 5PR ADO $ OO POSTAGE CATALOGOVER 50 PLANS $ioo DEALERS WRITE WORLDWIDE SID MORGAN 13157 ORMOND BELLEVILLE 48111 USA AFFORDABLE SPEED CONTROLS SIX models speed controls ally proportIonal elltter dlreotlue Also IncOrpOrated stall-sale tImer wtdch shuts down motor event 018 Irons motor receIver receIver hatlery failure AIrplanecompleteAnnambled ModetsParts KItand TeSted EkE24eginosnaso EKE24Lf N/A$4100 EKEF5$4000$5000 esra EKE7R$2500$3100 EkE-7RM$2600$3200 EKEFR$4000$5000 EKEFB$4000$0000 RBV4$1095$1095 RBV4 ON BOARD VOLTMETER assembled anlls cerry fall 50day warranty Please send $200 toe postage handlIng per order Send SASE tsr IntOsnatlon Msll orders ELDEN-KEN ELECTRONICS INC PO Box iaoa Aroada Colorado 60001 call today 1303 4311328 VIsa U.tvad romped p1us 0%
Edition: Model Aviation - 1989/09
Page Numbers: 56, 57, 162, 163, 164
I RETURNED competitive Free Flight flying 1983 after 18-year layoff quickly found some facts life somehow thought would never occur Item loss skill through inactivity Construction techniques easy second-nature abilities sud denly relearned reacquired Too thumbs elbows persistence practice managed take care shortcom ings passage time disconcerting item two rac ing ahead technology Design building techniques changed considerably Airfoils thinner last Wakefield built early Fifties still 10%-thick airfoil Wings now longer span stabs smaller thinner much lighter biggest mental hurdle presented prop/front-end/power utilization modernday Wakefield Thats learned about Mon treal stops machined front ends neces sity obtaining 100% energy available 40 grams actually 39 grams plus lube rubber introduction Montreal stop equipment led seek out variations could find put within range camera Obvi ously created worldwide could document However close enough sources try determine inventoror least learn important part modern Wakefield came about obvious place start Cana dian acquaintances made Taft CA Unfortu nately young really provide firsthand knowledge names like Haisman Seagrave McGilivary McGlashan Tarnofsky others offered reference Several tele phone conversations letters elicited different answers Actually rea sonable answer proof provided source closer home realized quired several Grey Eagles next Taft 56 Model Aviation Free Flight Duration Sal Fruciano 6146 E Cactus Wren Rd Scottsdale AZ 85253 widely believed very first Montreal stop -type Wakefield front end Loren Salisbury modified free-wheeling Wakefield prop folder added drop-pin stop Photo taken about 1952 unit made sometime earlier discussion text Closeups fuselage details Randy Archers /2A Xenon reveal multifunctilon clockwork timer installation Above empty pressure-bladder-type fuel tank poised below its nest inside rolled-tube fuselage Small coil spring stabilizer hold-down line provides Down elevator bunt maneuver transition glide Aft end fuselage Below L shows elevated stabilizer mount dangling ends VIT DT control lines Aluminumskinned balsa fuselage tube ends adjustable incidence cam Below R VIT Blurry ob jects towards left photo ends glide dethermalizer control lines contest reply always Ask Andy Fay kun searched Out Andy outlined chosen task Andys reply swift positive hesitation also offered provide photographic proof actual first prop unit modified 1952 Loren Salis bury Lorens efforts changed free-wheeler folder added spring-loaded drop-pin mechanism nearly identical units presently used Andy explained Los Angeles Thermal Thumbers very active club Mon treal group Correspondence Barry Hais man editor very fine Montreal Newsletter led publishing idea Apparently Mon treal group saw much advantage droppin system took heart became Montreal stop appears Guido Fea Italy using same system approximately same time see Zaics Yearbook 1955-58 edition page 109 Much has happened original relatively simple design since time notable changes occurred because original mecha nism altered obtain additional functions Mike Seagrave published little piece entitled Autorudder Control Front End Montreal-based Internationalist newsletter about 1957 depicts scheme too much different devices presently use 30 years later Louis Joyners reeent FF Duration effort May 1989 issue provided some detailed pho tos accessories made Poland Among Wakefield front end showed what 35 years evolution improvement can provide am happy report several madein-Poland items now available USA through Starline International 6146 E Cactus Wren Rd Scottsdale AZ 85253 SPZ-1 front end shown has slightly American ized provide fitting 1 /s-in-dia tube Arrivederci Taft some movers shakers West Coast Free Flight circles have way will flying future Western Free Flight meets new field name new real estate Lost Hills aka Antelope Plains about 45-mm drive further north Taft site Walt Ghios Two-Man FAI Challenge first contest held spring Eyewitness re ports indicate worth extra miles field 4 x 7 miles size flat devoid veg etation physical hazards Doug Galbreath re ports almost spot 4 x 7-mile area acceptable flying chasing Motels about nine miles away Some effort being made explore possibility obtaining per manent Free Flight site Change inevitable Kitty Litter facility Taft usually downwind has grown four times its size 10 \N~OLES to___ autorudder 1/ 0fk spring & I piunger LA 7 spinner ltifunction Wakefield front end idea ap peared Mike Seagraves Internationalist newsletter Montreal Canada about 1957 years ago Relations oil company Taft site seem restrictive modeling activity site continues increase have seen used new site have far provided positive response wag combined names given site arrive Lost Planes What need find relatively rich Free Flighter philanthropic bent could purchase long-term-use lease site Such appar ently available moderate hah price Xenon name new series Power mod els designed Randy Archer Starting /2A version Randy breaking away very successful series models based Sat ellite design Xenon provides test bed layout ideas have provided intense efforts FIC competition us have seen Xenon fly agree its outstanding characteristics surpass high-performance AMA planes 288 sq cannot considered big AA weight six ounces 20K-revving TD front Xenon moves skyward rapid rate climbing straight up followed bunt right-circling glide CG location 50% wing chord provides climb stability goes-where-you aim-it variety Some interesting design details include surfaces covered 1-mil clear Mylar Color ing added use broad-tip Magic Marker inside face covering prior its application Mylar adhered framework 3M 77 spray adhesive technique mask off everything except leading trailing edges apply adhe sive problem particular spray adhe sive will become soft under hot condi tions losing its excellent adhering properties Randy simple solution After laying down Mylar sprayed edges trim ming finishing normally would ap plies %-in -wide strip clear MonoKote around perimeter wing forms permanent almost invisible seal covering very light easy apply provides totally moisture-proof envelope structure fuselage single tapered tube wing pylon stab mount rudder epoxied directly surface Randy makes use FiC con struction experience utilizing aluminum/ balsa laminate form fuselage tube Alumi num skin tempered 0009 / balsa sheet cut exact trapezoidal shape required 12-hour epoxy thinned 50/50 applied Continued page 162 September 1989 57 Some goodies available author Frucianos Starline InternatIonal business Above L R Three-function timer Wakefield lighttrimmed essentials weight 16 grams Wakefield Montreal stop front end has superbly crafted prop-folder hinge hub removable adjustable-pitch blade etc Another 3-function timer Below also light weight 16 grams Also available 2- 5-function versions Requires no lubrication Cabin waning slowly reviving growing Catapult Glider pio neered Chicago Aeronuts meets now USIC creating another high-level contest fly Excellent contest management has always hallmark USIC year no ex ception doubtless reasons entry list slowly steadily growing Though meet has subsidized Na tional Free Flight Society general fund gen erosity cannot continue forever would take about 125 entrants annually USIC break Lets get behind best Indoor meet world FF Duration/Fruciano Continued page 57 balsa aluminum carefully centered laminate wrapped around mandrel appropriate shape form tube allowed dry Its light tough requires no further finish Thin-walled surgical tubing used make pressure-bladder tank eas ily inserted tubes cavity major depanure convention de sign application plain V-dihedral competition Power fliers seem have adopted feature V-dihedral Xenon other West Coast ships does its job well perhaps better standard multipanel polyhedral wings Ease construction lighter tal weight since two dihedral joints elimi nated additional efficiency clean un broken spans positive factors asked Whatand name Xe non Randy replied Its gas Seldom has Free Flight modeler dis posal products materials presently avail able him used satisfy ourselves balsa tissue acetate-based cements en gines moderate ability todays modeler pushed maximum find proper applica tion bulletproof fabricsmaterials pound pound stronger steel foams unique strength capabilities cements con tinue improve abilities dry faster can lay parts down assembly Some present-day aeromodelers can re late experience old Rip Van Winkle awoke after 20-year sleep find life around him changed radically present assignments volunteer membership chairman National Free Flight society NFFS Hardly day passes house phone call letter former model builder has decided get back Free Flight realize have ma jor changes begs informa tion will bring him up date position fill fellow Free Flighters am offered excellent vantage point Free Flight growth pattern ad ditions ranks coming former model ers want again RC fliers ready different kind aeromodeling challenge Free Flight alive well perhaps bit different years past still challenge ingenuity skill its practitioners recently chance compare NFFS membership list names par ticipated 88 Lawrenceville IL FF Nats ably organized after FF events AMA Tidewater VA Nats can celled Less 50% participating Lawrenceville NFFS members Cmon fellas know theres no such thing free lunch Tony Ital iano dedicated group formed run Law renceville contest would have happened time read 89 contest will also history However dont embarrassed participated NFFS member matter easily rectified forwarding $15 one-year membership writer name address appear top article Fellow PMAC Phoenix Model Airplane Club member Al Lidbergs prolific workbench contin ues source Free Flight Scale models configurations am sure well acquainted some construc tion articles have appeared MA past must comment upon Als thoroughness aim making faithful good-flying replica full-scale aircraft witness too months ago Al appeared flying field C02-powered Me- 163B Komet Au gust 1988 MA Now constructing Flying Scale model Me-163 would normally give modeler sec ond thoughts especially intended actually fly Als ship same appeared photos construction article complete battle paint flip prop 163B away vertical climb would have rivalled its full-scale ancestor straight up 15 sec followed fast flat glide made wonder 16-in-span model could provide such performance little wing area outstanding demonstration ability Scale models perform well designed flown capable modeler INTRODUCING THE. FLEX-MO UNT FOR 40 AND 60 SIZE ENGINES Reduces Airframe Noise Isolates Engine Vibration Versatile 3 & 4 Hole Mount Universal Mounting System PLANES/ NGS/ 1226 E Ave a-ia Lancaster CA 93535 Available through belier Hobby Shops Dealer ributor Inquiries Invited FLEX MOUNT 60 Accepts Front-tntake 60 Engines toclodes necessary mounting hardware Made USA 162 Model Aviation DODGSu Ut * ThEY KNOW THAT THEY ARE FLYING THE MOST LETHAL MULTITASK THERMAL COMPETITION GLIDER KIT IN THE KNOWN WORLD IT IS TIGHT AND THRILLING SCREAMER ONE MINUTE AND GENTLE SOLID SHIP THAT CAN CLIMB OUT ON THE SLIGHTEST HINT OF LFT THE NEXT MINUTE ** FULL SOPHISTICATED CONTROL FUNCTIONS CAN BE ACIIEVED WITH EVEN SIMPLE 4 CHANNEL RADIO AND YET ThE NEW COMPUTER DRIVEN RADIOS CAN BE USED ALSO ** THIS GLIDER LINE HAS SOMETHING TO CROW ABOUT HAVING INTRODUCED IT WITH THE WINDSONG IN 1982 THE COMPETITION HAS BEEN EATING CROW EVER SINCEI 4 PICTURED DAVE BANKS ONE OF SOARINGS BESTI * Seimd 2 ttmp 10 ow sew catdog * * Ou# Newsletter 8ECO W3 8911 Now Avalebi Pal SI * 2isu uamson Road Bothell WA 98021 206-776-8067 FM-40 FLEX-MO UNt 40 Accepts Front-Intake 25 toSS Engines Includes necessary mounting hardware Lidberg Model Plan Service 614 E Fordham Tempe AZ 85283 continues grow Als cus tomers learn plane list flier Im speaking PMAC pub lishes great newsletter Eight dollars will bring 12 issues year its timely informa tive Heat treating music wire can sometimes solve problems associated bending shapes difficultif impossibleto normal modeling tools music wire use landing gear high-carbon steel has heat treated spring temper very useful us form Spring temper defines hardness mate rial measured would about Rc Rockwell 45 temper steel referred being tough hardness range Rc 20 considered soft Rc 60 hard its tough temper state wire can workednot easily soft can bent cut However sometimes tough state just too tough us work steel easily heat up heats becomes softer its softer state can bend way need Now some parts thats OK landing gear just cant leave such soft state cause very first landing wire would sim ply bend spring back its original posi tion shape So return steel its springy condition must restore specific temper heat treating First heat wire torch until comes bright cherry red color represents temperature about 12000 F quench rapidly cool room-temperature water plunging steel water twisting motion prevent water vapor steam insulating wire coolant action rest water quench thus achieved point wire should very hard probably above Rc 60 test whether attempt file mark superhard area file should slide off cutting steel cuts instead just sliding off ma terial working high-carbon steel case get another piece wire start over because will able add necessary carbon low-carbon steel dont try use wire very hard state because quite brittle will snap off instead flexing next step retempering high-carbon steel wire back its desired hardness shine up steel wool emery cloth heat up gradually using following colors guide As piece heated first color observed will straw 3500 followed dark blue 6000 followed medium blue 75Q0 point remove wire heat source allow cool slowly quench blow Just let sit room temperature away drafts Once steel returns room temperature should target hardness RC45 good spring temper Perform file test again should able make mark now albeit some effort passes test now have tempered wire proper degree Music wire tempered proper state makes great special-purpose cutting tool Instead re heating 7500 stop straw-colored stage will have wire back Rc 60 will still very hard brittle Finally engine maintenance instructor Harron High School New York City Mr Hell weg used say dont learn right Galaxy 8 Computer JR Galaxy 8 POM Computer has user friendly central processing unit state-of-the-art Features include ABC&W 10KHZ narrow band dual conversion receiver 4 JR 4001 servos rechargeable Tx & airborne NiOds NiCd charger complete servo accessories & hardware LCD display servo reverse & subtrims channels dual rates & exponential aileron elevator rudder interference/battery fail safe ATV stop watch count down timer accumulated use timer memory 7 separate aircraft Tx PCMIPPM selectable adjustable stick length swivel antenna direct servo controller trainer system low battery alarm plug RF module RE output meter data reset servo test Special helicopter ACC tail rotor accelerator ATS throttle hold adjustable throttle curves3 adjustable pitch curves4 inverted flight system airplane mode Special aircraft Snap roll2 flaperon differenal aileron v-tail mix elevator-flap mix 4 free mix programs ailable your//IODS local hobby dealer/I7f7fiIC9 Distributed Hobby Dynamics Distributors e 1-800-458-0241 PO Box 3726 Champaign IL 61826-3726 FAX 1-217-355-0058 September 1989 163 Oily Tay Fly Ualaxy youre using well mayas kiss nuts goodbye ZAP LOCKtm ultimate thread-locking compound Works metal wood plastic combination surfaces Available medium blue label high green label strength ZAP THE TOTAL ADHESIVE SYSTEM" Pacer Ted CaIforna USA LARRY JOLLY KITS Now Stock Pantera 100 span Great Contest Plane11995 Cheetah 112 span Aileron Contest Plane16495 Meteor 128 span Open Class Contest Plane13995 Flinger 59 Span great hand launch plane3495 CA Res add 7% Tax $395 S&H 154 Model Aviation wont right may eloquent its surety point anyone has photograph certain rubberpowered model its designer builder Dr Gil B Emdriga 1198 Buford St NW Palm Bay FL 329O7telephone 1-407/727-0683 would like hear entered model contest Clark Air Force Base Philip pines 1953 model lost boom ing thermal Dr Emdriga never took photo noted quite few people attending contest did Maybe people reading column remembers plane follow ing features 36-in wingspan 80% lifting stab rolled-tube balsa fuselage single-bladed folding prop jug-formed blade DT accom plished detaching stab attached model tether autorotated bring model downexcept superthermal milestone sorts will established year August 12-13 Tulsa Glue Dobbers conjunction Wichita Wichihawks spon sors its 40th annual Free Flight contest other clubs can claim have equalled surpassed mark Category III contest site Perry Munici pal Airport located six miles north Perry OK Highway 77 Events scheduled Gas Gas BCD Gas Nostalgia Gas NFFS rules FAt Combo FtA/B/C A-i HandLaunched Glider Mulvihill Rubber Small Field Combo P-30/Electric/Coupe/020 Repli ca/C02 Contest Firectors Jack Hamilton telephone 1-918/665-8371 Jim OReilly telephone 1-316/744-0851 CD Jack Hamilton notes Wichitas SAM group also holding its annual FF contest site same days FF Indoor/Tenny Continued page 58 ada has followed recent series jug props has shared some calculations slightly different area has covered Note charts presented subset data Bill sent deriva tions calculations shown hope present theory future column cause believe will allow easier design specific pitch-distrubution scheme Bills first contribution relates amount camber will produced given prop form Table 1 shows blade camber percentages different blade widths form diameters second contribution Bills work de sign method produces prop close approximation trueor helicalpitch design pitch will appear blade root tip pitch center blade will somewhat higher hub tipso relation center blade both tip hub washed Out somewhat Some designers consider type pitch dis tribution advantageous Tables 2 3 4 show sample parameters various types props Bill has calculated Table 2 assumes preformed blade cut 16-oz plastic beer cup nondrinkers cup has top diameter 3125 bottom diam eter 2625 2875 average exam ple 6-in -dia Bostonian prop blade length 25 places blade root 05-in radius Setup angle refers angle set pitch gage mounting blades Bills de signs setup angle defined center blade segment props Table 2 175 Can angle angular offset blade centerline cut blade out side cup Note calculations also sume blade segment vertically centered side cup Table 3 shows similar data Manhattan Easy B props 14-in dia blade segment lengths 6 Table 4 covers 12 x 22-in Novice Pennyplane prop Setup angle again measured center blade segment setup radius 4 Table 3 35 Table 4 Rear rubber pegs Scale Manhattan Cabin Bostonian Plenny Bates innovative guy willing make measurements during exper unental verification new ideas So Don Lindley suggested hardwood rear motor pegs Scale Manhattan Cabin Bostonian mod els would stronger same weight lighter same strength I/~ aluminum tubing Plenny decided check out tests show given length /16 tubing about 25% heavier standard round toothpick about strength Plenny set up stooge used calibrated tester records force being applied sample breaks toothpick samples supported 1 1 toothpick tested toothpick weighing 0095 grams broke just under 7 lb force weighing 008 grams broke 52 lb very scruffy-looking toothpick weighed 0085 grams broke 28 lb Plenny said last looked bad wouldnt have used 28 lb pull motor made -in rubber would exert during windVINTAQE -C PLAN CONSOLIDATED PBY-5A ~CATALINA 9 FT WING SPAN ALL RIBS B FULL FORMERS SHOWN ON PLANS PLASEIC ENGCOWLS $1090 PR CLEAR GUN BLISTERS $760 PR 4 LARGE PLAN SHEETS s $ 895 6FT WING SPAN MODEL PBY-SA ENGINE COWL5 $Z50 PR Plans $1495 GUN BLISTERS $ 5PR ADO $ OO POSTAGE CATALOGOVER 50 PLANS $ioo DEALERS WRITE WORLDWIDE SID MORGAN 13157 ORMOND BELLEVILLE 48111 USA AFFORDABLE SPEED CONTROLS SIX models speed controls ally proportIonal elltter dlreotlue Also IncOrpOrated stall-sale tImer wtdch shuts down motor event 018 Irons motor receIver receIver hatlery failure AIrplanecompleteAnnambled ModetsParts KItand TeSted EkE24eginosnaso EKE24Lf N/A$4100 EKEF5$4000$5000 esra EKE7R$2500$3100 EkE-7RM$2600$3200 EKEFR$4000$5000 EKEFB$4000$0000 RBV4$1095$1095 RBV4 ON BOARD VOLTMETER assembled anlls cerry fall 50day warranty Please send $200 toe postage handlIng per order Send SASE tsr IntOsnatlon Msll orders ELDEN-KEN ELECTRONICS INC PO Box iaoa Aroada Colorado 60001 call today 1303 4311328 VIsa U.tvad romped p1us 0%