SAD NEWS About time typing effort gan word came modeling pioneer Tony Becker died recently always enjoyed working Tony good ideas boundless enthusiasm models Tonys latest project promote Federation ROGone challenging unofficial events come along some time Modeling has lost another friend richer having known Tony will miss him Speaking Federation ROG early devel opment class some fliers felt no would top five minutes Wrong again David Aronstein did 507 Liberty Bell Federation ROG Delta hangar Tampa FL New Years Day 1989 anyone ready predict another time wont beaten much lead time periodically mention lead time need get anything specific sue Well MA s publisher has admonished send off before leave USIC John son City will leave about day pack models can head out May 31 read can compute weeks now add about two addi tional weeks just must get something last minute call evenings 1-214/2354035 anyone out David Hodges 34337 Road 168 Visalia CA 93291 telephone 1209/798-1963 hoping make Contact anyone southern San Joaquin Valley would interested Indoor flying gym nasium College Sequoias Visalia David exmodeler coming back activ ity after 53 years got hooked Indoor al accident NFFS Top 10 models Two 1989 NFFS awards Indoor subjects Earl Hoffmans Symphony Intermediate Stick model Ron Williams book Building Flying Indoor Model Airplanes Congratulations Earl Ron awards Although Rons book has out print Ed Whitten reported Ron hoping get another printing definitive work published begin ners can have access New Indoor activity Two new clubs have setting up Indoor sessions generating new ly ing opportunities Indoor Model Association River City INMARC started Burr Stanton 9210 Darley Dr Louisville KY 40241 Burr also editor INMARC newslet ter Although small newsletter Burr presents several helpful hints beginners issue Also like small groups actively seeking additional and/or better sites live area check out group small aggressively working come bigger group activities second club just over year old has become active Free Flight activities cluding year-round Indoor eoinn TOPIvIAC Free Flight Flyers Heartlands USA AMA Charter #2357 SAM Chapter #71 Jack Koehlar both club president ed itor TOPMAC Topics newsletter six seven sheets printed both sides attrac tively done has plans technical articles excel lent contest reporting extensive contest calendar listing covering events Oklahoma Kansas Nebraska Missouri Illinois anyone general region newsletter al must-have item non-club members cost $10 per year Send Jack check 3425 Arrowhead Rd Topeka KS 66614 Jack also contact man club contests flying sessions can reached 1-913/272-8439 What Junior problem Quoting Jack Koehlar contest report TOPMAC Topics realbut anticipateddisappoint ment usual lack Junior Senior fliers Still yours truly doesnt believe en courages Junior Senior fliers combining events combining Senior Open TOPMAC will continue have separate events Junior Senior Open ve fund such financially unjustified events myself believe must separate ages encourage Juniors Seniors participate model avia tion its contests CDs Are listening 58 Model Aviation Free Flight Indoor Bud Tenny Box 545 Richardson TX 75080 Stan Chiltons Easy B box loaded models experImental props see text True-pitch hardwood prop blOck has carved using computer-controlled shaper Reader feedback Bill Henderson Ottawa CanContinued page 164 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% PRODUCTS Complete Line Exhaust Systems d Pipes led Tuned Pipes Headers uri Mufflers Expansion Mufflers copter Ball Mufflers ialized Exhaust Systems Unsurpassed Workmanship & Performance ing Samples / aluminum tubing sup ported 1475 tested music wire place case failure mode tubing would take permanent set %2-in bendfor 4-lb pull some instances would sufficient music wire could removed using tools test sample 78-in wood dowel supported 1275 easily withstood 16-lb pull force %2-in aluminum tubing same weight lengthbut music wire insert bent 200 under 12-lb pull weight advantage Because CG-to-peg distance least long CG-to-nose distance may nearly three times long some models 006 gram weight saved peg can mean between 006 0 18 gram less nose weight Scale modelfor up gram weight savings Oops advantage break mo tor winding using blowup tube motor usually bunches inside blowup tube maintaining death grip rear peg very light model may require force pull peg through rubber fuselage structure can withstand Heres solve problem wood peg slide toward side until blowup tube touches fuselage Clip off much peg pos sible repeat other end peg will short enough both loaded blowup tube will slide right out model Once blowup tube out model easy punch motor out tube get ready fly new motor theory could also clip aluminum peg force required clip aluminum much greater wood alumi num probably will mash flat clip point could very difficult remove peg special effort box o props seen photos shows serious Stan Chilton about props Easy B box props inside vary widely blade area diameter 13 15 box represents lot research experimentation True-pitch prop blocks seen another photos depict helicalor true-pitchprop block cut hardwood Ed Wickland 2412 Tucson Ave Pensacola FL 32506 has computer-controlled shaper generate prop blocks specifications needs pitch gle information iAin intervals along entire block prices based block length $8 turn printer airfoil plotter with.. FOILED AGAIN! IN C PLOT AIRFOILS IN ANY UtIORD UP TO 24 INCHES MODIFY THICKNESS CAMBER & TRAILING EDGE PLOT SKIN THICKNESS FOR SHEETED WINGS ENTER DATA EASILY VIA INTELLIGENT EDITOR USER-FRIENDLY MENUDRIVEN OPERATION INCLUDES tSPAGE ILLUSTRATED USER MANUAL $3995 O,nea o*n pku. ,c,aoaIOuOdoftfr USS0 Rqsoe OOl-PC47YAToWpo0k 0pWtO4ddC5flpM-S S0 0 CYGNET Software 24843 Del Prado #141b Dana Point CA 92629 3-in block 6-in prop $12 5-in block $15 10-in block block shown builds 10 x 13 prop Next time current plan discuss Bill Hendersons prop design scheme hope have discussion special stooge Plenny Bates uses increase advantages using wood instead aluminum tubing rear rubber pegs FF Old-Timers/Baker Continued page 59 Trails Hobby Helper plans saleand old Rubber Scale plans kits magazines will copy magazine articles very reasonable tee Hobby Helper carried full-size plans Air Trails beginning June 1953 issue its successor magazines Air Trails Hobbies Young Men Young Men American Modeler American Aircraft Modeler up through Febru ary 1973 issue latter have available several years good have article-copying service available will henceforth refer such re quests receive Gleason because am able provide such service love Old-Timers Rubber Scale youve got love Earl Stahl So Johnny Car son says got tell couple years ago mentioned friend Mik Mikkel son wanted put out special April Fools Day issue Okie Free Flight Flyer no longer published dont write copies Anyway told once drawn up P-47 Earl Stahl stylejust own amuseent said would give newsletterif could find Its out ga rage somewhere kept after him did find it thing beauty made up crazy story ex plain great Stahl would submit unpub lished design such humble newsletter Flyers last page included some other obvious put-ons did tell truth plan really Mik much fun saw issue Aeromodeller results contest models Stahl designs listedand P-47 among Someone England out get now Anyway nothing else happened until Tom Ar nold editor fine Scale newsletter 325 F Ave Coronado CA 92118 published P-47 plan Okie Flyer April 89 issue looked punch line wasnt Tom apparently thought thing Stahl Continued page 166 HANGAR 1711 PLANS PLUS ITS EASY TO MAKE YOUR OWN KIT SAVE MONEY YOU CUT OUT PARTS * Ba1os & P1vQ~ Ioosl plus music wire spruce & maple wood lSize Plrnos * Temp1te SIseost * IO1AtxLiCtiOOsos & Hiostos * Ccuoplete Part LIAL R/C CORSAIR $35 SPECIPICATIONa Wing spas 46 Wing Area 450 Sq Lemgth 34i/2 Luadims iS Ou/Sq Pt Weight Si/26 Engine 25 Cu Sadiu 4Chanoel R/C HORNET $25 SPECIPICATIONa wing SpaS 27 Wing Area 275 Sq In. LemEth 25i/i Loading i3 Oz/Sq Pt Weight ii/2# Engine 074 tucen See Radio 4Channel micro servos C/L AEROBAT $25 SPECIFICATSONa Wing Spas 52 Wing Area 435 Sq Length 36i/S Engine 35 Cm C/L BABY LAKES $15 SPECIFICATSONS Wing Span 29 Wing Area 300 Sq Is. Length 211/4 Engine 15 Co O-dem Ynrnxos ThdyI PLEASE ADD 54 SUPPING & OANDtItiG THASE YOU STANGEL ENTERPRISES P 0 BOX 336 WAUKESHA WISCONSIN 53187-0336 September 1989 165 St
Edition: Model Aviation - 1989/09
Page Numbers: 58, 164, 165
SAD NEWS About time typing effort gan word came modeling pioneer Tony Becker died recently always enjoyed working Tony good ideas boundless enthusiasm models Tonys latest project promote Federation ROGone challenging unofficial events come along some time Modeling has lost another friend richer having known Tony will miss him Speaking Federation ROG early devel opment class some fliers felt no would top five minutes Wrong again David Aronstein did 507 Liberty Bell Federation ROG Delta hangar Tampa FL New Years Day 1989 anyone ready predict another time wont beaten much lead time periodically mention lead time need get anything specific sue Well MA s publisher has admonished send off before leave USIC John son City will leave about day pack models can head out May 31 read can compute weeks now add about two addi tional weeks just must get something last minute call evenings 1-214/2354035 anyone out David Hodges 34337 Road 168 Visalia CA 93291 telephone 1209/798-1963 hoping make Contact anyone southern San Joaquin Valley would interested Indoor flying gym nasium College Sequoias Visalia David exmodeler coming back activ ity after 53 years got hooked Indoor al accident NFFS Top 10 models Two 1989 NFFS awards Indoor subjects Earl Hoffmans Symphony Intermediate Stick model Ron Williams book Building Flying Indoor Model Airplanes Congratulations Earl Ron awards Although Rons book has out print Ed Whitten reported Ron hoping get another printing definitive work published begin ners can have access New Indoor activity Two new clubs have setting up Indoor sessions generating new ly ing opportunities Indoor Model Association River City INMARC started Burr Stanton 9210 Darley Dr Louisville KY 40241 Burr also editor INMARC newslet ter Although small newsletter Burr presents several helpful hints beginners issue Also like small groups actively seeking additional and/or better sites live area check out group small aggressively working come bigger group activities second club just over year old has become active Free Flight activities cluding year-round Indoor eoinn TOPIvIAC Free Flight Flyers Heartlands USA AMA Charter #2357 SAM Chapter #71 Jack Koehlar both club president ed itor TOPMAC Topics newsletter six seven sheets printed both sides attrac tively done has plans technical articles excel lent contest reporting extensive contest calendar listing covering events Oklahoma Kansas Nebraska Missouri Illinois anyone general region newsletter al must-have item non-club members cost $10 per year Send Jack check 3425 Arrowhead Rd Topeka KS 66614 Jack also contact man club contests flying sessions can reached 1-913/272-8439 What Junior problem Quoting Jack Koehlar contest report TOPMAC Topics realbut anticipateddisappoint ment usual lack Junior Senior fliers Still yours truly doesnt believe en courages Junior Senior fliers combining events combining Senior Open TOPMAC will continue have separate events Junior Senior Open ve fund such financially unjustified events myself believe must separate ages encourage Juniors Seniors participate model avia tion its contests CDs Are listening 58 Model Aviation Free Flight Indoor Bud Tenny Box 545 Richardson TX 75080 Stan Chiltons Easy B box loaded models experImental props see text True-pitch hardwood prop blOck has carved using computer-controlled shaper Reader feedback Bill Henderson Ottawa CanContinued page 164 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% PRODUCTS Complete Line Exhaust Systems d Pipes led Tuned Pipes Headers uri Mufflers Expansion Mufflers copter Ball Mufflers ialized Exhaust Systems Unsurpassed Workmanship & Performance ing Samples / aluminum tubing sup ported 1475 tested music wire place case failure mode tubing would take permanent set %2-in bendfor 4-lb pull some instances would sufficient music wire could removed using tools test sample 78-in wood dowel supported 1275 easily withstood 16-lb pull force %2-in aluminum tubing same weight lengthbut music wire insert bent 200 under 12-lb pull weight advantage Because CG-to-peg distance least long CG-to-nose distance may nearly three times long some models 006 gram weight saved peg can mean between 006 0 18 gram less nose weight Scale modelfor up gram weight savings Oops advantage break mo tor winding using blowup tube motor usually bunches inside blowup tube maintaining death grip rear peg very light model may require force pull peg through rubber fuselage structure can withstand Heres solve problem wood peg slide toward side until blowup tube touches fuselage Clip off much peg pos sible repeat other end peg will short enough both loaded blowup tube will slide right out model Once blowup tube out model easy punch motor out tube get ready fly new motor theory could also clip aluminum peg force required clip aluminum much greater wood alumi num probably will mash flat clip point could very difficult remove peg special effort box o props seen photos shows serious Stan Chilton about props Easy B box props inside vary widely blade area diameter 13 15 box represents lot research experimentation True-pitch prop blocks seen another photos depict helicalor true-pitchprop block cut hardwood Ed Wickland 2412 Tucson Ave Pensacola FL 32506 has computer-controlled shaper generate prop blocks specifications needs pitch gle information iAin intervals along entire block prices based block length $8 turn printer airfoil plotter with.. FOILED AGAIN! IN C PLOT AIRFOILS IN ANY UtIORD UP TO 24 INCHES MODIFY THICKNESS CAMBER & TRAILING EDGE PLOT SKIN THICKNESS FOR SHEETED WINGS ENTER DATA EASILY VIA INTELLIGENT EDITOR USER-FRIENDLY MENUDRIVEN OPERATION INCLUDES tSPAGE ILLUSTRATED USER MANUAL $3995 O,nea o*n pku. ,c,aoaIOuOdoftfr USS0 Rqsoe OOl-PC47YAToWpo0k 0pWtO4ddC5flpM-S S0 0 CYGNET Software 24843 Del Prado #141b Dana Point CA 92629 3-in block 6-in prop $12 5-in block $15 10-in block block shown builds 10 x 13 prop Next time current plan discuss Bill Hendersons prop design scheme hope have discussion special stooge Plenny Bates uses increase advantages using wood instead aluminum tubing rear rubber pegs FF Old-Timers/Baker Continued page 59 Trails Hobby Helper plans saleand old Rubber Scale plans kits magazines will copy magazine articles very reasonable tee Hobby Helper carried full-size plans Air Trails beginning June 1953 issue its successor magazines Air Trails Hobbies Young Men Young Men American Modeler American Aircraft Modeler up through Febru ary 1973 issue latter have available several years good have article-copying service available will henceforth refer such re quests receive Gleason because am able provide such service love Old-Timers Rubber Scale youve got love Earl Stahl So Johnny Car son says got tell couple years ago mentioned friend Mik Mikkel son wanted put out special April Fools Day issue Okie Free Flight Flyer no longer published dont write copies Anyway told once drawn up P-47 Earl Stahl stylejust own amuseent said would give newsletterif could find Its out ga rage somewhere kept after him did find it thing beauty made up crazy story ex plain great Stahl would submit unpub lished design such humble newsletter Flyers last page included some other obvious put-ons did tell truth plan really Mik much fun saw issue Aeromodeller results contest models Stahl designs listedand P-47 among Someone England out get now Anyway nothing else happened until Tom Ar nold editor fine Scale newsletter 325 F Ave Coronado CA 92118 published P-47 plan Okie Flyer April 89 issue looked punch line wasnt Tom apparently thought thing Stahl Continued page 166 HANGAR 1711 PLANS PLUS ITS EASY TO MAKE YOUR OWN KIT SAVE MONEY YOU CUT OUT PARTS * Ba1os & P1vQ~ Ioosl plus music wire spruce & maple wood lSize Plrnos * Temp1te SIseost * IO1AtxLiCtiOOsos & Hiostos * Ccuoplete Part LIAL R/C CORSAIR $35 SPECIPICATIONa Wing spas 46 Wing Area 450 Sq Lemgth 34i/2 Luadims iS Ou/Sq Pt Weight Si/26 Engine 25 Cu Sadiu 4Chanoel R/C HORNET $25 SPECIPICATIONa wing SpaS 27 Wing Area 275 Sq In. LemEth 25i/i Loading i3 Oz/Sq Pt Weight ii/2# Engine 074 tucen See Radio 4Channel micro servos C/L AEROBAT $25 SPECIFICATSONa Wing Spas 52 Wing Area 435 Sq Length 36i/S Engine 35 Cm C/L BABY LAKES $15 SPECIFICATSONS Wing Span 29 Wing Area 300 Sq Is. Length 211/4 Engine 15 Co O-dem Ynrnxos ThdyI PLEASE ADD 54 SUPPING & OANDtItiG THASE YOU STANGEL ENTERPRISES P 0 BOX 336 WAUKESHA WISCONSIN 53187-0336 September 1989 165 St
Edition: Model Aviation - 1989/09
Page Numbers: 58, 164, 165
SAD NEWS About time typing effort gan word came modeling pioneer Tony Becker died recently always enjoyed working Tony good ideas boundless enthusiasm models Tonys latest project promote Federation ROGone challenging unofficial events come along some time Modeling has lost another friend richer having known Tony will miss him Speaking Federation ROG early devel opment class some fliers felt no would top five minutes Wrong again David Aronstein did 507 Liberty Bell Federation ROG Delta hangar Tampa FL New Years Day 1989 anyone ready predict another time wont beaten much lead time periodically mention lead time need get anything specific sue Well MA s publisher has admonished send off before leave USIC John son City will leave about day pack models can head out May 31 read can compute weeks now add about two addi tional weeks just must get something last minute call evenings 1-214/2354035 anyone out David Hodges 34337 Road 168 Visalia CA 93291 telephone 1209/798-1963 hoping make Contact anyone southern San Joaquin Valley would interested Indoor flying gym nasium College Sequoias Visalia David exmodeler coming back activ ity after 53 years got hooked Indoor al accident NFFS Top 10 models Two 1989 NFFS awards Indoor subjects Earl Hoffmans Symphony Intermediate Stick model Ron Williams book Building Flying Indoor Model Airplanes Congratulations Earl Ron awards Although Rons book has out print Ed Whitten reported Ron hoping get another printing definitive work published begin ners can have access New Indoor activity Two new clubs have setting up Indoor sessions generating new ly ing opportunities Indoor Model Association River City INMARC started Burr Stanton 9210 Darley Dr Louisville KY 40241 Burr also editor INMARC newslet ter Although small newsletter Burr presents several helpful hints beginners issue Also like small groups actively seeking additional and/or better sites live area check out group small aggressively working come bigger group activities second club just over year old has become active Free Flight activities cluding year-round Indoor eoinn TOPIvIAC Free Flight Flyers Heartlands USA AMA Charter #2357 SAM Chapter #71 Jack Koehlar both club president ed itor TOPMAC Topics newsletter six seven sheets printed both sides attrac tively done has plans technical articles excel lent contest reporting extensive contest calendar listing covering events Oklahoma Kansas Nebraska Missouri Illinois anyone general region newsletter al must-have item non-club members cost $10 per year Send Jack check 3425 Arrowhead Rd Topeka KS 66614 Jack also contact man club contests flying sessions can reached 1-913/272-8439 What Junior problem Quoting Jack Koehlar contest report TOPMAC Topics realbut anticipateddisappoint ment usual lack Junior Senior fliers Still yours truly doesnt believe en courages Junior Senior fliers combining events combining Senior Open TOPMAC will continue have separate events Junior Senior Open ve fund such financially unjustified events myself believe must separate ages encourage Juniors Seniors participate model avia tion its contests CDs Are listening 58 Model Aviation Free Flight Indoor Bud Tenny Box 545 Richardson TX 75080 Stan Chiltons Easy B box loaded models experImental props see text True-pitch hardwood prop blOck has carved using computer-controlled shaper Reader feedback Bill Henderson Ottawa CanContinued page 164 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% PRODUCTS Complete Line Exhaust Systems d Pipes led Tuned Pipes Headers uri Mufflers Expansion Mufflers copter Ball Mufflers ialized Exhaust Systems Unsurpassed Workmanship & Performance ing Samples / aluminum tubing sup ported 1475 tested music wire place case failure mode tubing would take permanent set %2-in bendfor 4-lb pull some instances would sufficient music wire could removed using tools test sample 78-in wood dowel supported 1275 easily withstood 16-lb pull force %2-in aluminum tubing same weight lengthbut music wire insert bent 200 under 12-lb pull weight advantage Because CG-to-peg distance least long CG-to-nose distance may nearly three times long some models 006 gram weight saved peg can mean between 006 0 18 gram less nose weight Scale modelfor up gram weight savings Oops advantage break mo tor winding using blowup tube motor usually bunches inside blowup tube maintaining death grip rear peg very light model may require force pull peg through rubber fuselage structure can withstand Heres solve problem wood peg slide toward side until blowup tube touches fuselage Clip off much peg pos sible repeat other end peg will short enough both loaded blowup tube will slide right out model Once blowup tube out model easy punch motor out tube get ready fly new motor theory could also clip aluminum peg force required clip aluminum much greater wood alumi num probably will mash flat clip point could very difficult remove peg special effort box o props seen photos shows serious Stan Chilton about props Easy B box props inside vary widely blade area diameter 13 15 box represents lot research experimentation True-pitch prop blocks seen another photos depict helicalor true-pitchprop block cut hardwood Ed Wickland 2412 Tucson Ave Pensacola FL 32506 has computer-controlled shaper generate prop blocks specifications needs pitch gle information iAin intervals along entire block prices based block length $8 turn printer airfoil plotter with.. FOILED AGAIN! IN C PLOT AIRFOILS IN ANY UtIORD UP TO 24 INCHES MODIFY THICKNESS CAMBER & TRAILING EDGE PLOT SKIN THICKNESS FOR SHEETED WINGS ENTER DATA EASILY VIA INTELLIGENT EDITOR USER-FRIENDLY MENUDRIVEN OPERATION INCLUDES tSPAGE ILLUSTRATED USER MANUAL $3995 O,nea o*n pku. ,c,aoaIOuOdoftfr USS0 Rqsoe OOl-PC47YAToWpo0k 0pWtO4ddC5flpM-S S0 0 CYGNET Software 24843 Del Prado #141b Dana Point CA 92629 3-in block 6-in prop $12 5-in block $15 10-in block block shown builds 10 x 13 prop Next time current plan discuss Bill Hendersons prop design scheme hope have discussion special stooge Plenny Bates uses increase advantages using wood instead aluminum tubing rear rubber pegs FF Old-Timers/Baker Continued page 59 Trails Hobby Helper plans saleand old Rubber Scale plans kits magazines will copy magazine articles very reasonable tee Hobby Helper carried full-size plans Air Trails beginning June 1953 issue its successor magazines Air Trails Hobbies Young Men Young Men American Modeler American Aircraft Modeler up through Febru ary 1973 issue latter have available several years good have article-copying service available will henceforth refer such re quests receive Gleason because am able provide such service love Old-Timers Rubber Scale youve got love Earl Stahl So Johnny Car son says got tell couple years ago mentioned friend Mik Mikkel son wanted put out special April Fools Day issue Okie Free Flight Flyer no longer published dont write copies Anyway told once drawn up P-47 Earl Stahl stylejust own amuseent said would give newsletterif could find Its out ga rage somewhere kept after him did find it thing beauty made up crazy story ex plain great Stahl would submit unpub lished design such humble newsletter Flyers last page included some other obvious put-ons did tell truth plan really Mik much fun saw issue Aeromodeller results contest models Stahl designs listedand P-47 among Someone England out get now Anyway nothing else happened until Tom Ar nold editor fine Scale newsletter 325 F Ave Coronado CA 92118 published P-47 plan Okie Flyer April 89 issue looked punch line wasnt Tom apparently thought thing Stahl Continued page 166 HANGAR 1711 PLANS PLUS ITS EASY TO MAKE YOUR OWN KIT SAVE MONEY YOU CUT OUT PARTS * Ba1os & P1vQ~ Ioosl plus music wire spruce & maple wood lSize Plrnos * Temp1te SIseost * IO1AtxLiCtiOOsos & Hiostos * Ccuoplete Part LIAL R/C CORSAIR $35 SPECIPICATIONa Wing spas 46 Wing Area 450 Sq Lemgth 34i/2 Luadims iS Ou/Sq Pt Weight Si/26 Engine 25 Cu Sadiu 4Chanoel R/C HORNET $25 SPECIPICATIONa wing SpaS 27 Wing Area 275 Sq In. LemEth 25i/i Loading i3 Oz/Sq Pt Weight ii/2# Engine 074 tucen See Radio 4Channel micro servos C/L AEROBAT $25 SPECIFICATSONa Wing Spas 52 Wing Area 435 Sq Length 36i/S Engine 35 Cm C/L BABY LAKES $15 SPECIFICATSONS Wing Span 29 Wing Area 300 Sq Is. Length 211/4 Engine 15 Co O-dem Ynrnxos ThdyI PLEASE ADD 54 SUPPING & OANDtItiG THASE YOU STANGEL ENTERPRISES P 0 BOX 336 WAUKESHA WISCONSIN 53187-0336 September 1989 165 St