MANY builders Old Timer RC-assisted models have successfully scaled designs up down original have gratilring results reducing Powerhouse 85% Ole Reliable 60% Westerner Scram 50% have also satisfied after enlarging Viking Panther However such scaling does always result model same flight characteristics original months fea ture illustrates such deleterious result 1940 Henry Struck designed new model meet requirements 1940 rules Wing loading requirements removed 80-oz/cu displacement rule introduced 1940 competitioa Struck named model New Ruler 60 model required weigh 48 oz six-foot design published Air Trails April/May 1940 Though prototype initially powered Brown-D Struck substituted Super Cyke New Ruler established itself potent contest machine Possessed lovely esthetics model actually looks like sport model exhibits excellent power pattern superb giide hundredplus models Struck has designed nearly 50 years modeling recently designed East wing Jetco feel New Ruler memorable New Ruler contrasts sharply ordinary designs era breaks away common boxy appearance realm highiy tuned pylon model retaining looks like real airplane quality During same time period years thereafter Struck working Bill Effingers Berkeley Models designer draftsman old Berkeley kit plans display Henry Strucks name drawn box responsible outright firms long line models such Flying Cloud Bootstraps Interstate Cadet etc Since Berkeley line included 60-sized free-flight designs such Buccaneers Cava liers Effinger chose kit New Ruler size appeal owners new highly popular 23/29-sized powerplants resultant scale-down renamed American Ace 54 rather interesting light discovery preparing three views model actually spans 52 inches 39 years Id presumed span 54 inches never measured Editors Note Buc Eflinger design Cavalier Shereshaw American Ace proved commercial success attributed its esthetics Im sure superior gliding characteristics HENRY STRUCKS AMERICAN ACE KITTED BY BERKELEY MODELS 1940 SPAN 52 AREA 432 50 IN SAM MAXENGINE I93Oc ORIGINALPLANS 5HOW19T049/ / Id -J 4 0 z 0 0 4 K 6 2 Id -J z 0 2 O 2 4 6 B 10 12 14 ROUGH COMPARISON SCALE FOR NEW RULER O 12345678910 SCALE FOR AM ACE Ace relatively simple model trim free-flight mode once gets enough lead nose adequate CG location its relatively oversized wood thicknesses complex struc tures render lead-sled glide mode stout house sport role negative result scaling down highly successful New Ruler American Ace pointed out Openers editor Bill long ago Editors Note point being areas dimensions change different orders example Doubling dimension squares area vice versa photo model constructed flown worn out six years ago Although constructed contest grade wood covered Solarfiim about light covering possible prototype weighed whopping 56 ox two-channel brick a225MAHpack resulting wing loading nearly 185 oz/sq ft Such loadings tine sport type RC completely unsatisfactory radio-assisted Old Timer would suggest anyone interested design reduce wood sizes least 1/16th make effort keep tail light forget notion thermaling model will provide hours fun sport flier Fuselage construction utilizes basic box 3/16 balsa strip formers stringers attached top bottom pylon constructed center keel 3/16 formers sides top Covering pylon best accomplished wet silk large doses patience original features removable engine firewall ignition tray stick attached used removable hatch Continued page 112 38 Model Aviation American Ace 54 powered byTD 09 Removable lower hatch 2-channel radio rudder elevator Scaled down Strucks New Ruler powered Brown Junior its FF competitive performance suffered accordingly does make nice sport job radio assist PECKS MODEL MENAGERIE PEANUT SCALE KITS $395 PIETENPOL GIPSY MOTH P PER J3 CUB ANORRASON URRULENTGANAGOR MU5TANGCOUGAR COMPLETE CATALOG $100 GA0E TO RWSER MOOR SUPPLIES 7Cat4aee P 0 BOX 2498 -MA 7LA ME5A CAUP 92041 PHONE 714 4695675 714 442-4636 WHY PAY MORE SINCE 1948 big buy high performance *FIREBALL #H30 HOT 3 volts faster starts #S20 STANDARD 24 volts general use #C15 COOL 15 volts cures pre-ignition 9RBB BLOW-OUT PROOF SEAL IS HERE 98 000000000 00 04 0000 00 @00 6 LONGER LIFE GLOW PLUGS gooses 0 0 0 0 0 0 0 0 0 0000 0004 SWANSON ASSOCIATES PO BOX lIEWAYNE NEW IEEWET 07470 0 LOWEST DRAIN flier Dont compromise fine event have just few too lazy put good finish planes Thats month Keep contest reports coming new address Bill Hager 4622 Bridge port Drive Garland TX 75043 RC Soaring/Pruss continued tram page 35 borne pack dropped 45 volts would allow about hour safe flying What makes record incredible attempt began preparations two-thirty morning sun came up schedule wind didnt wasnt until two-twelve afternoon Foka launched flight continued through night through next day finally landed six-eighteen second evening Dip wing Brian Laging company heckuvan effort Clean Living Pays Off Department does anybody wanna buy 9-volt rabbits foot know beer commercial TV shows sports celebrities having finally tears top off beer can says cheers everybody happy ever wanted run modelers ad men should have traveled east recent York Pennsylvania contest As Keith Finkenbiner recently transplanted midwesterner LSF Treasurer no wasnt run out town related story went something like Its first round York boys using oft-mentioned Don Goughnour retrieval sys tem still works like charm after two years Now retrieval portion winch has fine monofilament line attached ring end tow line plane comes off monofila ment reeled bringing hack chute ring However monofilament difficult see thats seldom problem Seldom except Don Clark Thermal Sniffler fame has Paragon air search lift What Don doesnt know has flown monofilament now draped over center wing No problem except monofilament being spooled Dons Paragon wing holddown rubber bands being sawed through sawed through Don low-key Clark some say low key has awakened during ten-minute max watched wing flutter down wondering hmmm must way out checking voltage rabbits foot Don saw fuselage get entangled monofilament weight fuselage overtook speed take-up spool parachute caused enough drag allow fuselage lowered gently ground hard luck boys yelling foul uttering some guys will anything relaunch becomes part future strategy might want consider long will take saw through 9/32-in wing rod something like Aquila Grande Donwithout missing puff pipewent CD calmly asked could get reflight Oh yes Don got reflight maxed out four four won event Cheers Dan Pruss Route 2 Box 490 Plainfiel4 IL 60544 RC Helicopters/Chesney continued page 37 starts pilot announces starting altitude minimum 20 feet Upon calling maneuver pilot stops engine Helicopter des cends controlled landing such helicopter can flown immediately afterwards engine restart helicopter lands helipad landing scored 0 10 points landing takes place within 100-foot circle around helipad #4 helipad scored 0 5 points maximum 29 Landing Maneuver proceeds smooth translational descent minimum altitude 20 feet touchdown Touchdown must soft maximum score downgrade skid touches down first long helicopter does bounce second skid touches down Dave Chesney Rt 9 Box 621A Greensborn NC 27409 RC Old Timer/Mathews continued page 38 bottom access RC unit switch course placed cockpit Wing tail construction multi-spar construction sheet-covered leading edge wing aisfoil section indeterminate lineage undercambered relatively thin double elliptical surfaces constructed sheet outlines bent 3/16 sq leading edge undercarriage semi-torque-rod singlewire unit held firewall originally grooved wooden blocks No epoxy nor apparent ly J-bolts available 1940 Editor J-bolts requiring excellent craftsmanship used could anticipate gear staying Ambroid wire tail skid attached balsa block tall end 112 Model Aviation Kraftsmanship kit processed AAMCO GOLD BALSAThis Trainer will blow apart hits ground GREATEST R/C BASIC TRAINER Design & Kit ALL TIME Ask over 25000 satisfied builders H-RAY dealers sold themSHALL WE SAY MORE Andreas Aircraft Model Co Inc US Ete 1& North St Topsijeld Mass 01983 887-8541 Support AMA Price $3995 kit per dollar bar em power HOMELITE EWFI SpuIelflR IlomeIlfe SlolnIor Textron bade oinedtogntndtbceatuthr best toe - the Super Vastipt Sopor Huetlet hoe Built 050K startIng leton whon olOole gully cooledI Heel treated black oulded p bolt prop hub Ito tIn edjuntmtlt 01 prop elultI No elagnlO IgoltIon redare weight end blbratlOn MuPlerlKopenelon ubnttrbue wIth euub englon AlumInum 0gm tttoantwlfheeuhetlpltte Two 11119 plelun wittl enlIRt benelnee front end reerrreln end both end 01 uoneoIlflg end Loop euerenglltg cod hemIhead br roeptloel power emouth 1010 end hIgh rel10bllltyl Vapor Ortetlot esoond power rsllebIllly end dureblIlIf NASIOS -Cott lut ourbot Ptbrs Ofl OdOl lOtUS --updbtlbattytb tO PROPS Hoglleezhrb-tdSobedoltu7db thoto OttEWO PtdPluto erdotedtott OddbdttpdbflUbS pedsuSPdUtTtdd dontaontthufltdUtedt SPARK PLUGS ncao - - 1db RDJt%adlhO Ptg nntattatonut dS dead - - tgs Oundre Peukeg Irroludo S boll bob entre plop s fltrottl link eOlreosf robe sin loot line CB wortnftd9Pu Gondre9000 KITS Puma -S2dddT wt IrKAVY SUn NERVO SPdcitcottu droidflOdtdttafld theltad otdtbsueucutbOddS EXTRA AMP BOX - dO BALL REARING PEAS FOR 90 SERVO - lbs EWHTANKKIT33 ClUnk3db FUEL LtNE beocut noberns tot Swelt PA HEW EWN AILERON HINGE KIT Glee lilled nylnoBbS ROILPING MAtERIAlS bemewood uluorroane robing nirurult plywood CALL FOR AVAILABILITY OF NEW KITS SELL WHAT WE FLY & SERVICE WHAT WE SELL CAN ANSWER YOUR QUESTIONS ABOUT MINAURE AIRCRAFT HAVE SPECIAL POOP SHEET -CALL-GET ON OUR MAILING LIST DEPEND ON YOUR FEEDBACK FOR CONTINOUS PRODUCT IMPROVEMENT & DEVELOPEMENT SPECIALIZE IN QUARTER SIZE Prepaid shipping charge $200 CeOeD shipping charge $400 L within continental UeSe BankAmericard Master Charge EWH Specialties Inc 607 East Abram Ste Arlington Texas 76010 817/461-1274 prices subject change notice Dealer Inquiries Welcomed Ironically although no kit manufacturer saw fit market New Ruler 1940s semi-kit available 40 years later Schmidt Custom Kits 11948 Franklin Blvd Elk Grove CA 95624 has available kit cut parts such ribs formers surface outlines included strip wood pieces hardware Wood quality fabrication excellent Write prices other semi-kits Although Ace does possess its big brothers attributes thermaling delight nonetheless builds highly interesting sport model particularly converted RC same reasons design proved good seller Berkeley Ace has such eye pleasing lines far out rut still represents exciting building flying project Just keep tail light would recom mend throttled 25cc powerplant perhaps adding inch nose Build send us picture strange times As automobiles become smaller models become larger Jumbo phenomenon has invaded Old Timer movement Cohen Longstreet flying Quadra powered 12-foot Powerhouse John Pond has 15-foot Folly II Tulp Kiel have built 15-foot Dallalre 4000 sq knows what other aslittle bitty toy airplanes emerg ing around country giants have plug-in wing panels portability drive compacts would hard pressed haul pair 7-foot wing sections obvious advantage such huge models visibility large model could remain sight flying out radio range degree visibility large objects over head dramatically demonstrated recently gas shortage forced wife Ito end What about Fluffy clouds green trees probably little breeze Marion Knights enlarged Scientific Mercury Shereshaw deadaticks recent Houston Old Timer meet Covering rayon dress lining sport things combine joys power sailpianing Bert Striegler plc September1979 113 ppP EWH Specialties TLER SUPER HUSTLER SPECIPICAIIOMS RAE METRIC Geylebooleel2N Sb I40000 SunooGtnoltn150250 ISTIIO39NG0 0492mm WRIghIIllAdo205KG ThrasI 160004100 RPM 2008 Hunllnt pruylfl04t50 FaRt20101 OyeriolOeIOlIMix price$19995 WE days drive north Dallas about 500 pm weather balloon struck watched pair antique Taylorcrafts flying slowly moving After dinner discovered semi-transparent obiect caught eye thing remained same position fYOYflO PROPELLERS Madeof polyester boil orcolor Go GRISH propeller True helical pitch airfoil win-power 2 Blade Tractor 53each 54535430d 636435d 74767850 84868865d 949697 9810-410685dneeds 114116118 Si 124125126$150 2 Blade Pasher 543 54-4636435 86854 96106Si 3 Blade Tractor 53 63 64504 3 Blade Pasher 63s043 mmBlade Metallic Aluminum color Tractor ifiB Si 86885125 96061045150 Pusher06 $150 Sizes pitches GRISI4 LARGE WOOD PROPELLERS HARDWOOD too hard minimizes chance costly plane engine damage True pitch airfoil fully finished balanced ready coating 318 BOREALL SIZES IN18 $7 68&lOPITcH 20 8 22 10 24 13 REYCKASIR little piece electronic wizardry quickly easiiy reverses direction servo travel plugged between receiver servo will work positive pulse servos e four wire Connectors NOT furnished Available unassembled kit form assembled tested 14K104Ace Servo Reverser kit $795 14K104CAce Servo Reverser assy $1150 details send $1 latest catalog Add $50 1st class return $1 hand ling direct orders 816 584-7121 IAE E/IrnJ Box ShE HIGGINSVILLE MO 64037 NEW ERA PUBLICATION CUSTOM TUNED ENGINESAEROBATIC AIRPLANES BY PORT C MORRISON COMPETITION ACCESSORIES4U PAGES I 52 PHOTOS Cox 049L051 SpecialistsU OE1AILEO DRAWINGS brochure send 15c stamp toOnly 6395 PLUS SOft POSTAGE Kuslom Kraftsmanship BrochureCATALOGS 3100 REPLA-TECH Box 2699 Laguna Hills CA 92653INTERNATIONAL icc 714 830-51624U500 MC KENZIE HWY VEGA OREGON 9745E several hours Texas covered monstrous high pressure system day surely some drift expected point turned TV discovered looking weather balloon released morning Palas tine TX National Science Foundation jumbo 450 feet diameter containing 40 million cu ft helium floating 23 miles overhead am still amazed unaided visual identifi cation object 120000 feet Apparently others switchboards Dallas went wild after sundown reflected sunlight produced pinkish cast side polyethylene balloon leading thousands UFO reports Dee B Mathews 506 S Walnu Greensburg KS 67054 writing advertisers mention read about Model Aviation mitation/Fancher continued page 45 deflection Simply stated means longer control horns bigger bellcrank Imitation uses homemade 3 circular bellcrank maintains its full 1 fulcrum entire range control movement pushrod exits bellcrank 09 bellcrank axis attached DuBro Ball Link flap horn inch flap hinge line flap elevator pushrod located 075 inches respective hinge lines classic one-to-one flap elevator ratio conven tional horn employed elevator allow use elevator slop necessary now appears ball links could have used throughout long tail moment large surface area tail have proven provide stability could hope handle provides finishing touch control system modified Custom Master Flight Handle designed Bob Baron produced Gene Martine Custom Master Products 5424 Oliver Street S Jacksonville FL 32211 Before leaving subject control surfaces lets talk bit about variable span flaps effect flight characteristics Imitation First lets once rid ourselves desire think flaps separate distinct wing Wing flaps simply part wing happen attached such way may moved up down about hinge line doing make substantial changes characteristics airfoil Reference Figure III changes significantly affect amount lift wing given area capable producing classic symmetrical stunt airfoil often referred non-lifting section inas much its top bottom surfaces mirror images result camber line line drawn equidistant top bottom surface straight line Theoretically such section zero angle attack would produce no lift due being no differential velocityand fore pressure above below wing Now hinge aft 15 20% wing surface deflect downward will have altered number things First have instantly changed uncambered non-lifting aiifoil cambered lifting Also since measure airfoils angle attack defined angle between relative wind line between leading edge trailing edge chord line have concurrently increased angle attack two items acting concert have made quantum increase amount lift produced same airfoil its natural symmetrical state apparent amount flap area important factor determin ing amount additional lift produced Rather percentage total wing span equipped high lift device significant other words wing has 15% its total area flap along its full span will produce signifi cantly lift same wing 15% its total area flap concen trated say s span So far well good Weve seen can apparently get something nothing almost instantaneously just bending back wing however small fly ointment buzzes around fact center lift almost exception located some what aft center gravity Addition ally center lift will move further aft deflection flaps concur rent increases lift angle attack As result divergent location 114 Model Aviation styles AT YOUR DEALER RIGHT HAND TRACTOR NEW SIZE IN B & 10 PITCH 26 $16 GRISH BROS ST JOHN INDIANA 46373
Edition: Model Aviation - 1979/09
Page Numbers: 38, 112, 113, 114
MANY builders Old Timer RC-assisted models have successfully scaled designs up down original have gratilring results reducing Powerhouse 85% Ole Reliable 60% Westerner Scram 50% have also satisfied after enlarging Viking Panther However such scaling does always result model same flight characteristics original months fea ture illustrates such deleterious result 1940 Henry Struck designed new model meet requirements 1940 rules Wing loading requirements removed 80-oz/cu displacement rule introduced 1940 competitioa Struck named model New Ruler 60 model required weigh 48 oz six-foot design published Air Trails April/May 1940 Though prototype initially powered Brown-D Struck substituted Super Cyke New Ruler established itself potent contest machine Possessed lovely esthetics model actually looks like sport model exhibits excellent power pattern superb giide hundredplus models Struck has designed nearly 50 years modeling recently designed East wing Jetco feel New Ruler memorable New Ruler contrasts sharply ordinary designs era breaks away common boxy appearance realm highiy tuned pylon model retaining looks like real airplane quality During same time period years thereafter Struck working Bill Effingers Berkeley Models designer draftsman old Berkeley kit plans display Henry Strucks name drawn box responsible outright firms long line models such Flying Cloud Bootstraps Interstate Cadet etc Since Berkeley line included 60-sized free-flight designs such Buccaneers Cava liers Effinger chose kit New Ruler size appeal owners new highly popular 23/29-sized powerplants resultant scale-down renamed American Ace 54 rather interesting light discovery preparing three views model actually spans 52 inches 39 years Id presumed span 54 inches never measured Editors Note Buc Eflinger design Cavalier Shereshaw American Ace proved commercial success attributed its esthetics Im sure superior gliding characteristics HENRY STRUCKS AMERICAN ACE KITTED BY BERKELEY MODELS 1940 SPAN 52 AREA 432 50 IN SAM MAXENGINE I93Oc ORIGINALPLANS 5HOW19T049/ / Id -J 4 0 z 0 0 4 K 6 2 Id -J z 0 2 O 2 4 6 B 10 12 14 ROUGH COMPARISON SCALE FOR NEW RULER O 12345678910 SCALE FOR AM ACE Ace relatively simple model trim free-flight mode once gets enough lead nose adequate CG location its relatively oversized wood thicknesses complex struc tures render lead-sled glide mode stout house sport role negative result scaling down highly successful New Ruler American Ace pointed out Openers editor Bill long ago Editors Note point being areas dimensions change different orders example Doubling dimension squares area vice versa photo model constructed flown worn out six years ago Although constructed contest grade wood covered Solarfiim about light covering possible prototype weighed whopping 56 ox two-channel brick a225MAHpack resulting wing loading nearly 185 oz/sq ft Such loadings tine sport type RC completely unsatisfactory radio-assisted Old Timer would suggest anyone interested design reduce wood sizes least 1/16th make effort keep tail light forget notion thermaling model will provide hours fun sport flier Fuselage construction utilizes basic box 3/16 balsa strip formers stringers attached top bottom pylon constructed center keel 3/16 formers sides top Covering pylon best accomplished wet silk large doses patience original features removable engine firewall ignition tray stick attached used removable hatch Continued page 112 38 Model Aviation American Ace 54 powered byTD 09 Removable lower hatch 2-channel radio rudder elevator Scaled down Strucks New Ruler powered Brown Junior its FF competitive performance suffered accordingly does make nice sport job radio assist PECKS MODEL MENAGERIE PEANUT SCALE KITS $395 PIETENPOL GIPSY MOTH P PER J3 CUB ANORRASON URRULENTGANAGOR MU5TANGCOUGAR COMPLETE CATALOG $100 GA0E TO RWSER MOOR SUPPLIES 7Cat4aee P 0 BOX 2498 -MA 7LA ME5A CAUP 92041 PHONE 714 4695675 714 442-4636 WHY PAY MORE SINCE 1948 big buy high performance *FIREBALL #H30 HOT 3 volts faster starts #S20 STANDARD 24 volts general use #C15 COOL 15 volts cures pre-ignition 9RBB BLOW-OUT PROOF SEAL IS HERE 98 000000000 00 04 0000 00 @00 6 LONGER LIFE GLOW PLUGS gooses 0 0 0 0 0 0 0 0 0 0000 0004 SWANSON ASSOCIATES PO BOX lIEWAYNE NEW IEEWET 07470 0 LOWEST DRAIN flier Dont compromise fine event have just few too lazy put good finish planes Thats month Keep contest reports coming new address Bill Hager 4622 Bridge port Drive Garland TX 75043 RC Soaring/Pruss continued tram page 35 borne pack dropped 45 volts would allow about hour safe flying What makes record incredible attempt began preparations two-thirty morning sun came up schedule wind didnt wasnt until two-twelve afternoon Foka launched flight continued through night through next day finally landed six-eighteen second evening Dip wing Brian Laging company heckuvan effort Clean Living Pays Off Department does anybody wanna buy 9-volt rabbits foot know beer commercial TV shows sports celebrities having finally tears top off beer can says cheers everybody happy ever wanted run modelers ad men should have traveled east recent York Pennsylvania contest As Keith Finkenbiner recently transplanted midwesterner LSF Treasurer no wasnt run out town related story went something like Its first round York boys using oft-mentioned Don Goughnour retrieval sys tem still works like charm after two years Now retrieval portion winch has fine monofilament line attached ring end tow line plane comes off monofila ment reeled bringing hack chute ring However monofilament difficult see thats seldom problem Seldom except Don Clark Thermal Sniffler fame has Paragon air search lift What Don doesnt know has flown monofilament now draped over center wing No problem except monofilament being spooled Dons Paragon wing holddown rubber bands being sawed through sawed through Don low-key Clark some say low key has awakened during ten-minute max watched wing flutter down wondering hmmm must way out checking voltage rabbits foot Don saw fuselage get entangled monofilament weight fuselage overtook speed take-up spool parachute caused enough drag allow fuselage lowered gently ground hard luck boys yelling foul uttering some guys will anything relaunch becomes part future strategy might want consider long will take saw through 9/32-in wing rod something like Aquila Grande Donwithout missing puff pipewent CD calmly asked could get reflight Oh yes Don got reflight maxed out four four won event Cheers Dan Pruss Route 2 Box 490 Plainfiel4 IL 60544 RC Helicopters/Chesney continued page 37 starts pilot announces starting altitude minimum 20 feet Upon calling maneuver pilot stops engine Helicopter des cends controlled landing such helicopter can flown immediately afterwards engine restart helicopter lands helipad landing scored 0 10 points landing takes place within 100-foot circle around helipad #4 helipad scored 0 5 points maximum 29 Landing Maneuver proceeds smooth translational descent minimum altitude 20 feet touchdown Touchdown must soft maximum score downgrade skid touches down first long helicopter does bounce second skid touches down Dave Chesney Rt 9 Box 621A Greensborn NC 27409 RC Old Timer/Mathews continued page 38 bottom access RC unit switch course placed cockpit Wing tail construction multi-spar construction sheet-covered leading edge wing aisfoil section indeterminate lineage undercambered relatively thin double elliptical surfaces constructed sheet outlines bent 3/16 sq leading edge undercarriage semi-torque-rod singlewire unit held firewall originally grooved wooden blocks No epoxy nor apparent ly J-bolts available 1940 Editor J-bolts requiring excellent craftsmanship used could anticipate gear staying Ambroid wire tail skid attached balsa block tall end 112 Model Aviation Kraftsmanship kit processed AAMCO GOLD BALSAThis Trainer will blow apart hits ground GREATEST R/C BASIC TRAINER Design & Kit ALL TIME Ask over 25000 satisfied builders H-RAY dealers sold themSHALL WE SAY MORE Andreas Aircraft Model Co Inc US Ete 1& North St Topsijeld Mass 01983 887-8541 Support AMA Price $3995 kit per dollar bar em power HOMELITE EWFI SpuIelflR IlomeIlfe SlolnIor Textron bade oinedtogntndtbceatuthr best toe - the Super Vastipt Sopor Huetlet hoe Built 050K startIng leton whon olOole gully cooledI Heel treated black oulded p bolt prop hub Ito tIn edjuntmtlt 01 prop elultI No elagnlO IgoltIon redare weight end blbratlOn MuPlerlKopenelon ubnttrbue wIth euub englon AlumInum 0gm tttoantwlfheeuhetlpltte Two 11119 plelun wittl enlIRt benelnee front end reerrreln end both end 01 uoneoIlflg end Loop euerenglltg cod hemIhead br roeptloel power emouth 1010 end hIgh rel10bllltyl Vapor Ortetlot esoond power rsllebIllly end dureblIlIf NASIOS -Cott lut ourbot Ptbrs Ofl OdOl lOtUS --updbtlbattytb tO PROPS Hoglleezhrb-tdSobedoltu7db thoto OttEWO PtdPluto erdotedtott OddbdttpdbflUbS pedsuSPdUtTtdd dontaontthufltdUtedt SPARK PLUGS ncao - - 1db RDJt%adlhO Ptg nntattatonut dS dead - - tgs Oundre Peukeg Irroludo S boll bob entre plop s fltrottl link eOlreosf robe sin loot line CB wortnftd9Pu Gondre9000 KITS Puma -S2dddT wt IrKAVY SUn NERVO SPdcitcottu droidflOdtdttafld theltad otdtbsueucutbOddS EXTRA AMP BOX - dO BALL REARING PEAS FOR 90 SERVO - lbs EWHTANKKIT33 ClUnk3db FUEL LtNE beocut noberns tot Swelt PA HEW EWN AILERON HINGE KIT Glee lilled nylnoBbS ROILPING MAtERIAlS bemewood uluorroane robing nirurult plywood CALL FOR AVAILABILITY OF NEW KITS SELL WHAT WE FLY & SERVICE WHAT WE SELL CAN ANSWER YOUR QUESTIONS ABOUT MINAURE AIRCRAFT HAVE SPECIAL POOP SHEET -CALL-GET ON OUR MAILING LIST DEPEND ON YOUR FEEDBACK FOR CONTINOUS PRODUCT IMPROVEMENT & DEVELOPEMENT SPECIALIZE IN QUARTER SIZE Prepaid shipping charge $200 CeOeD shipping charge $400 L within continental UeSe BankAmericard Master Charge EWH Specialties Inc 607 East Abram Ste Arlington Texas 76010 817/461-1274 prices subject change notice Dealer Inquiries Welcomed Ironically although no kit manufacturer saw fit market New Ruler 1940s semi-kit available 40 years later Schmidt Custom Kits 11948 Franklin Blvd Elk Grove CA 95624 has available kit cut parts such ribs formers surface outlines included strip wood pieces hardware Wood quality fabrication excellent Write prices other semi-kits Although Ace does possess its big brothers attributes thermaling delight nonetheless builds highly interesting sport model particularly converted RC same reasons design proved good seller Berkeley Ace has such eye pleasing lines far out rut still represents exciting building flying project Just keep tail light would recom mend throttled 25cc powerplant perhaps adding inch nose Build send us picture strange times As automobiles become smaller models become larger Jumbo phenomenon has invaded Old Timer movement Cohen Longstreet flying Quadra powered 12-foot Powerhouse John Pond has 15-foot Folly II Tulp Kiel have built 15-foot Dallalre 4000 sq knows what other aslittle bitty toy airplanes emerg ing around country giants have plug-in wing panels portability drive compacts would hard pressed haul pair 7-foot wing sections obvious advantage such huge models visibility large model could remain sight flying out radio range degree visibility large objects over head dramatically demonstrated recently gas shortage forced wife Ito end What about Fluffy clouds green trees probably little breeze Marion Knights enlarged Scientific Mercury Shereshaw deadaticks recent Houston Old Timer meet Covering rayon dress lining sport things combine joys power sailpianing Bert Striegler plc September1979 113 ppP EWH Specialties TLER SUPER HUSTLER SPECIPICAIIOMS RAE METRIC Geylebooleel2N Sb I40000 SunooGtnoltn150250 ISTIIO39NG0 0492mm WRIghIIllAdo205KG ThrasI 160004100 RPM 2008 Hunllnt pruylfl04t50 FaRt20101 OyeriolOeIOlIMix price$19995 WE days drive north Dallas about 500 pm weather balloon struck watched pair antique Taylorcrafts flying slowly moving After dinner discovered semi-transparent obiect caught eye thing remained same position fYOYflO PROPELLERS Madeof polyester boil orcolor Go GRISH propeller True helical pitch airfoil win-power 2 Blade Tractor 53each 54535430d 636435d 74767850 84868865d 949697 9810-410685dneeds 114116118 Si 124125126$150 2 Blade Pasher 543 54-4636435 86854 96106Si 3 Blade Tractor 53 63 64504 3 Blade Pasher 63s043 mmBlade Metallic Aluminum color Tractor ifiB Si 86885125 96061045150 Pusher06 $150 Sizes pitches GRISI4 LARGE WOOD PROPELLERS HARDWOOD too hard minimizes chance costly plane engine damage True pitch airfoil fully finished balanced ready coating 318 BOREALL SIZES IN18 $7 68&lOPITcH 20 8 22 10 24 13 REYCKASIR little piece electronic wizardry quickly easiiy reverses direction servo travel plugged between receiver servo will work positive pulse servos e four wire Connectors NOT furnished Available unassembled kit form assembled tested 14K104Ace Servo Reverser kit $795 14K104CAce Servo Reverser assy $1150 details send $1 latest catalog Add $50 1st class return $1 hand ling direct orders 816 584-7121 IAE E/IrnJ Box ShE HIGGINSVILLE MO 64037 NEW ERA PUBLICATION CUSTOM TUNED ENGINESAEROBATIC AIRPLANES BY PORT C MORRISON COMPETITION ACCESSORIES4U PAGES I 52 PHOTOS Cox 049L051 SpecialistsU OE1AILEO DRAWINGS brochure send 15c stamp toOnly 6395 PLUS SOft POSTAGE Kuslom Kraftsmanship BrochureCATALOGS 3100 REPLA-TECH Box 2699 Laguna Hills CA 92653INTERNATIONAL icc 714 830-51624U500 MC KENZIE HWY VEGA OREGON 9745E several hours Texas covered monstrous high pressure system day surely some drift expected point turned TV discovered looking weather balloon released morning Palas tine TX National Science Foundation jumbo 450 feet diameter containing 40 million cu ft helium floating 23 miles overhead am still amazed unaided visual identifi cation object 120000 feet Apparently others switchboards Dallas went wild after sundown reflected sunlight produced pinkish cast side polyethylene balloon leading thousands UFO reports Dee B Mathews 506 S Walnu Greensburg KS 67054 writing advertisers mention read about Model Aviation mitation/Fancher continued page 45 deflection Simply stated means longer control horns bigger bellcrank Imitation uses homemade 3 circular bellcrank maintains its full 1 fulcrum entire range control movement pushrod exits bellcrank 09 bellcrank axis attached DuBro Ball Link flap horn inch flap hinge line flap elevator pushrod located 075 inches respective hinge lines classic one-to-one flap elevator ratio conven tional horn employed elevator allow use elevator slop necessary now appears ball links could have used throughout long tail moment large surface area tail have proven provide stability could hope handle provides finishing touch control system modified Custom Master Flight Handle designed Bob Baron produced Gene Martine Custom Master Products 5424 Oliver Street S Jacksonville FL 32211 Before leaving subject control surfaces lets talk bit about variable span flaps effect flight characteristics Imitation First lets once rid ourselves desire think flaps separate distinct wing Wing flaps simply part wing happen attached such way may moved up down about hinge line doing make substantial changes characteristics airfoil Reference Figure III changes significantly affect amount lift wing given area capable producing classic symmetrical stunt airfoil often referred non-lifting section inas much its top bottom surfaces mirror images result camber line line drawn equidistant top bottom surface straight line Theoretically such section zero angle attack would produce no lift due being no differential velocityand fore pressure above below wing Now hinge aft 15 20% wing surface deflect downward will have altered number things First have instantly changed uncambered non-lifting aiifoil cambered lifting Also since measure airfoils angle attack defined angle between relative wind line between leading edge trailing edge chord line have concurrently increased angle attack two items acting concert have made quantum increase amount lift produced same airfoil its natural symmetrical state apparent amount flap area important factor determin ing amount additional lift produced Rather percentage total wing span equipped high lift device significant other words wing has 15% its total area flap along its full span will produce signifi cantly lift same wing 15% its total area flap concen trated say s span So far well good Weve seen can apparently get something nothing almost instantaneously just bending back wing however small fly ointment buzzes around fact center lift almost exception located some what aft center gravity Addition ally center lift will move further aft deflection flaps concur rent increases lift angle attack As result divergent location 114 Model Aviation styles AT YOUR DEALER RIGHT HAND TRACTOR NEW SIZE IN B & 10 PITCH 26 $16 GRISH BROS ST JOHN INDIANA 46373
Edition: Model Aviation - 1979/09
Page Numbers: 38, 112, 113, 114
MANY builders Old Timer RC-assisted models have successfully scaled designs up down original have gratilring results reducing Powerhouse 85% Ole Reliable 60% Westerner Scram 50% have also satisfied after enlarging Viking Panther However such scaling does always result model same flight characteristics original months fea ture illustrates such deleterious result 1940 Henry Struck designed new model meet requirements 1940 rules Wing loading requirements removed 80-oz/cu displacement rule introduced 1940 competitioa Struck named model New Ruler 60 model required weigh 48 oz six-foot design published Air Trails April/May 1940 Though prototype initially powered Brown-D Struck substituted Super Cyke New Ruler established itself potent contest machine Possessed lovely esthetics model actually looks like sport model exhibits excellent power pattern superb giide hundredplus models Struck has designed nearly 50 years modeling recently designed East wing Jetco feel New Ruler memorable New Ruler contrasts sharply ordinary designs era breaks away common boxy appearance realm highiy tuned pylon model retaining looks like real airplane quality During same time period years thereafter Struck working Bill Effingers Berkeley Models designer draftsman old Berkeley kit plans display Henry Strucks name drawn box responsible outright firms long line models such Flying Cloud Bootstraps Interstate Cadet etc Since Berkeley line included 60-sized free-flight designs such Buccaneers Cava liers Effinger chose kit New Ruler size appeal owners new highly popular 23/29-sized powerplants resultant scale-down renamed American Ace 54 rather interesting light discovery preparing three views model actually spans 52 inches 39 years Id presumed span 54 inches never measured Editors Note Buc Eflinger design Cavalier Shereshaw American Ace proved commercial success attributed its esthetics Im sure superior gliding characteristics HENRY STRUCKS AMERICAN ACE KITTED BY BERKELEY MODELS 1940 SPAN 52 AREA 432 50 IN SAM MAXENGINE I93Oc ORIGINALPLANS 5HOW19T049/ / Id -J 4 0 z 0 0 4 K 6 2 Id -J z 0 2 O 2 4 6 B 10 12 14 ROUGH COMPARISON SCALE FOR NEW RULER O 12345678910 SCALE FOR AM ACE Ace relatively simple model trim free-flight mode once gets enough lead nose adequate CG location its relatively oversized wood thicknesses complex struc tures render lead-sled glide mode stout house sport role negative result scaling down highly successful New Ruler American Ace pointed out Openers editor Bill long ago Editors Note point being areas dimensions change different orders example Doubling dimension squares area vice versa photo model constructed flown worn out six years ago Although constructed contest grade wood covered Solarfiim about light covering possible prototype weighed whopping 56 ox two-channel brick a225MAHpack resulting wing loading nearly 185 oz/sq ft Such loadings tine sport type RC completely unsatisfactory radio-assisted Old Timer would suggest anyone interested design reduce wood sizes least 1/16th make effort keep tail light forget notion thermaling model will provide hours fun sport flier Fuselage construction utilizes basic box 3/16 balsa strip formers stringers attached top bottom pylon constructed center keel 3/16 formers sides top Covering pylon best accomplished wet silk large doses patience original features removable engine firewall ignition tray stick attached used removable hatch Continued page 112 38 Model Aviation American Ace 54 powered byTD 09 Removable lower hatch 2-channel radio rudder elevator Scaled down Strucks New Ruler powered Brown Junior its FF competitive performance suffered accordingly does make nice sport job radio assist PECKS MODEL MENAGERIE PEANUT SCALE KITS $395 PIETENPOL GIPSY MOTH P PER J3 CUB ANORRASON URRULENTGANAGOR MU5TANGCOUGAR COMPLETE CATALOG $100 GA0E TO RWSER MOOR SUPPLIES 7Cat4aee P 0 BOX 2498 -MA 7LA ME5A CAUP 92041 PHONE 714 4695675 714 442-4636 WHY PAY MORE SINCE 1948 big buy high performance *FIREBALL #H30 HOT 3 volts faster starts #S20 STANDARD 24 volts general use #C15 COOL 15 volts cures pre-ignition 9RBB BLOW-OUT PROOF SEAL IS HERE 98 000000000 00 04 0000 00 @00 6 LONGER LIFE GLOW PLUGS gooses 0 0 0 0 0 0 0 0 0 0000 0004 SWANSON ASSOCIATES PO BOX lIEWAYNE NEW IEEWET 07470 0 LOWEST DRAIN flier Dont compromise fine event have just few too lazy put good finish planes Thats month Keep contest reports coming new address Bill Hager 4622 Bridge port Drive Garland TX 75043 RC Soaring/Pruss continued tram page 35 borne pack dropped 45 volts would allow about hour safe flying What makes record incredible attempt began preparations two-thirty morning sun came up schedule wind didnt wasnt until two-twelve afternoon Foka launched flight continued through night through next day finally landed six-eighteen second evening Dip wing Brian Laging company heckuvan effort Clean Living Pays Off Department does anybody wanna buy 9-volt rabbits foot know beer commercial TV shows sports celebrities having finally tears top off beer can says cheers everybody happy ever wanted run modelers ad men should have traveled east recent York Pennsylvania contest As Keith Finkenbiner recently transplanted midwesterner LSF Treasurer no wasnt run out town related story went something like Its first round York boys using oft-mentioned Don Goughnour retrieval sys tem still works like charm after two years Now retrieval portion winch has fine monofilament line attached ring end tow line plane comes off monofila ment reeled bringing hack chute ring However monofilament difficult see thats seldom problem Seldom except Don Clark Thermal Sniffler fame has Paragon air search lift What Don doesnt know has flown monofilament now draped over center wing No problem except monofilament being spooled Dons Paragon wing holddown rubber bands being sawed through sawed through Don low-key Clark some say low key has awakened during ten-minute max watched wing flutter down wondering hmmm must way out checking voltage rabbits foot Don saw fuselage get entangled monofilament weight fuselage overtook speed take-up spool parachute caused enough drag allow fuselage lowered gently ground hard luck boys yelling foul uttering some guys will anything relaunch becomes part future strategy might want consider long will take saw through 9/32-in wing rod something like Aquila Grande Donwithout missing puff pipewent CD calmly asked could get reflight Oh yes Don got reflight maxed out four four won event Cheers Dan Pruss Route 2 Box 490 Plainfiel4 IL 60544 RC Helicopters/Chesney continued page 37 starts pilot announces starting altitude minimum 20 feet Upon calling maneuver pilot stops engine Helicopter des cends controlled landing such helicopter can flown immediately afterwards engine restart helicopter lands helipad landing scored 0 10 points landing takes place within 100-foot circle around helipad #4 helipad scored 0 5 points maximum 29 Landing Maneuver proceeds smooth translational descent minimum altitude 20 feet touchdown Touchdown must soft maximum score downgrade skid touches down first long helicopter does bounce second skid touches down Dave Chesney Rt 9 Box 621A Greensborn NC 27409 RC Old Timer/Mathews continued page 38 bottom access RC unit switch course placed cockpit Wing tail construction multi-spar construction sheet-covered leading edge wing aisfoil section indeterminate lineage undercambered relatively thin double elliptical surfaces constructed sheet outlines bent 3/16 sq leading edge undercarriage semi-torque-rod singlewire unit held firewall originally grooved wooden blocks No epoxy nor apparent ly J-bolts available 1940 Editor J-bolts requiring excellent craftsmanship used could anticipate gear staying Ambroid wire tail skid attached balsa block tall end 112 Model Aviation Kraftsmanship kit processed AAMCO GOLD BALSAThis Trainer will blow apart hits ground GREATEST R/C BASIC TRAINER Design & Kit ALL TIME Ask over 25000 satisfied builders H-RAY dealers sold themSHALL WE SAY MORE Andreas Aircraft Model Co Inc US Ete 1& North St Topsijeld Mass 01983 887-8541 Support AMA Price $3995 kit per dollar bar em power HOMELITE EWFI SpuIelflR IlomeIlfe SlolnIor Textron bade oinedtogntndtbceatuthr best toe - the Super Vastipt Sopor Huetlet hoe Built 050K startIng leton whon olOole gully cooledI Heel treated black oulded p bolt prop hub Ito tIn edjuntmtlt 01 prop elultI No elagnlO IgoltIon redare weight end blbratlOn MuPlerlKopenelon ubnttrbue wIth euub englon AlumInum 0gm tttoantwlfheeuhetlpltte Two 11119 plelun wittl enlIRt benelnee front end reerrreln end both end 01 uoneoIlflg end Loop euerenglltg cod hemIhead br roeptloel power emouth 1010 end hIgh rel10bllltyl Vapor Ortetlot esoond power rsllebIllly end dureblIlIf NASIOS -Cott lut ourbot Ptbrs Ofl OdOl lOtUS --updbtlbattytb tO PROPS Hoglleezhrb-tdSobedoltu7db thoto OttEWO PtdPluto erdotedtott OddbdttpdbflUbS pedsuSPdUtTtdd dontaontthufltdUtedt SPARK PLUGS ncao - - 1db RDJt%adlhO Ptg nntattatonut dS dead - - tgs Oundre Peukeg Irroludo S boll bob entre plop s fltrottl link eOlreosf robe sin loot line CB wortnftd9Pu Gondre9000 KITS Puma -S2dddT wt IrKAVY SUn NERVO SPdcitcottu droidflOdtdttafld theltad otdtbsueucutbOddS EXTRA AMP BOX - dO BALL REARING PEAS FOR 90 SERVO - lbs EWHTANKKIT33 ClUnk3db FUEL LtNE beocut noberns tot Swelt PA HEW EWN AILERON HINGE KIT Glee lilled nylnoBbS ROILPING MAtERIAlS bemewood uluorroane robing nirurult plywood CALL FOR AVAILABILITY OF NEW KITS SELL WHAT WE FLY & SERVICE WHAT WE SELL CAN ANSWER YOUR QUESTIONS ABOUT MINAURE AIRCRAFT HAVE SPECIAL POOP SHEET -CALL-GET ON OUR MAILING LIST DEPEND ON YOUR FEEDBACK FOR CONTINOUS PRODUCT IMPROVEMENT & DEVELOPEMENT SPECIALIZE IN QUARTER SIZE Prepaid shipping charge $200 CeOeD shipping charge $400 L within continental UeSe BankAmericard Master Charge EWH Specialties Inc 607 East Abram Ste Arlington Texas 76010 817/461-1274 prices subject change notice Dealer Inquiries Welcomed Ironically although no kit manufacturer saw fit market New Ruler 1940s semi-kit available 40 years later Schmidt Custom Kits 11948 Franklin Blvd Elk Grove CA 95624 has available kit cut parts such ribs formers surface outlines included strip wood pieces hardware Wood quality fabrication excellent Write prices other semi-kits Although Ace does possess its big brothers attributes thermaling delight nonetheless builds highly interesting sport model particularly converted RC same reasons design proved good seller Berkeley Ace has such eye pleasing lines far out rut still represents exciting building flying project Just keep tail light would recom mend throttled 25cc powerplant perhaps adding inch nose Build send us picture strange times As automobiles become smaller models become larger Jumbo phenomenon has invaded Old Timer movement Cohen Longstreet flying Quadra powered 12-foot Powerhouse John Pond has 15-foot Folly II Tulp Kiel have built 15-foot Dallalre 4000 sq knows what other aslittle bitty toy airplanes emerg ing around country giants have plug-in wing panels portability drive compacts would hard pressed haul pair 7-foot wing sections obvious advantage such huge models visibility large model could remain sight flying out radio range degree visibility large objects over head dramatically demonstrated recently gas shortage forced wife Ito end What about Fluffy clouds green trees probably little breeze Marion Knights enlarged Scientific Mercury Shereshaw deadaticks recent Houston Old Timer meet Covering rayon dress lining sport things combine joys power sailpianing Bert Striegler plc September1979 113 ppP EWH Specialties TLER SUPER HUSTLER SPECIPICAIIOMS RAE METRIC Geylebooleel2N Sb I40000 SunooGtnoltn150250 ISTIIO39NG0 0492mm WRIghIIllAdo205KG ThrasI 160004100 RPM 2008 Hunllnt pruylfl04t50 FaRt20101 OyeriolOeIOlIMix price$19995 WE days drive north Dallas about 500 pm weather balloon struck watched pair antique Taylorcrafts flying slowly moving After dinner discovered semi-transparent obiect caught eye thing remained same position fYOYflO PROPELLERS Madeof polyester boil orcolor Go GRISH propeller True helical pitch airfoil win-power 2 Blade Tractor 53each 54535430d 636435d 74767850 84868865d 949697 9810-410685dneeds 114116118 Si 124125126$150 2 Blade Pasher 543 54-4636435 86854 96106Si 3 Blade Tractor 53 63 64504 3 Blade Pasher 63s043 mmBlade Metallic Aluminum color Tractor ifiB Si 86885125 96061045150 Pusher06 $150 Sizes pitches GRISI4 LARGE WOOD PROPELLERS HARDWOOD too hard minimizes chance costly plane engine damage True pitch airfoil fully finished balanced ready coating 318 BOREALL SIZES IN18 $7 68&lOPITcH 20 8 22 10 24 13 REYCKASIR little piece electronic wizardry quickly easiiy reverses direction servo travel plugged between receiver servo will work positive pulse servos e four wire Connectors NOT furnished Available unassembled kit form assembled tested 14K104Ace Servo Reverser kit $795 14K104CAce Servo Reverser assy $1150 details send $1 latest catalog Add $50 1st class return $1 hand ling direct orders 816 584-7121 IAE E/IrnJ Box ShE HIGGINSVILLE MO 64037 NEW ERA PUBLICATION CUSTOM TUNED ENGINESAEROBATIC AIRPLANES BY PORT C MORRISON COMPETITION ACCESSORIES4U PAGES I 52 PHOTOS Cox 049L051 SpecialistsU OE1AILEO DRAWINGS brochure send 15c stamp toOnly 6395 PLUS SOft POSTAGE Kuslom Kraftsmanship BrochureCATALOGS 3100 REPLA-TECH Box 2699 Laguna Hills CA 92653INTERNATIONAL icc 714 830-51624U500 MC KENZIE HWY VEGA OREGON 9745E several hours Texas covered monstrous high pressure system day surely some drift expected point turned TV discovered looking weather balloon released morning Palas tine TX National Science Foundation jumbo 450 feet diameter containing 40 million cu ft helium floating 23 miles overhead am still amazed unaided visual identifi cation object 120000 feet Apparently others switchboards Dallas went wild after sundown reflected sunlight produced pinkish cast side polyethylene balloon leading thousands UFO reports Dee B Mathews 506 S Walnu Greensburg KS 67054 writing advertisers mention read about Model Aviation mitation/Fancher continued page 45 deflection Simply stated means longer control horns bigger bellcrank Imitation uses homemade 3 circular bellcrank maintains its full 1 fulcrum entire range control movement pushrod exits bellcrank 09 bellcrank axis attached DuBro Ball Link flap horn inch flap hinge line flap elevator pushrod located 075 inches respective hinge lines classic one-to-one flap elevator ratio conven tional horn employed elevator allow use elevator slop necessary now appears ball links could have used throughout long tail moment large surface area tail have proven provide stability could hope handle provides finishing touch control system modified Custom Master Flight Handle designed Bob Baron produced Gene Martine Custom Master Products 5424 Oliver Street S Jacksonville FL 32211 Before leaving subject control surfaces lets talk bit about variable span flaps effect flight characteristics Imitation First lets once rid ourselves desire think flaps separate distinct wing Wing flaps simply part wing happen attached such way may moved up down about hinge line doing make substantial changes characteristics airfoil Reference Figure III changes significantly affect amount lift wing given area capable producing classic symmetrical stunt airfoil often referred non-lifting section inas much its top bottom surfaces mirror images result camber line line drawn equidistant top bottom surface straight line Theoretically such section zero angle attack would produce no lift due being no differential velocityand fore pressure above below wing Now hinge aft 15 20% wing surface deflect downward will have altered number things First have instantly changed uncambered non-lifting aiifoil cambered lifting Also since measure airfoils angle attack defined angle between relative wind line between leading edge trailing edge chord line have concurrently increased angle attack two items acting concert have made quantum increase amount lift produced same airfoil its natural symmetrical state apparent amount flap area important factor determin ing amount additional lift produced Rather percentage total wing span equipped high lift device significant other words wing has 15% its total area flap along its full span will produce signifi cantly lift same wing 15% its total area flap concen trated say s span So far well good Weve seen can apparently get something nothing almost instantaneously just bending back wing however small fly ointment buzzes around fact center lift almost exception located some what aft center gravity Addition ally center lift will move further aft deflection flaps concur rent increases lift angle attack As result divergent location 114 Model Aviation styles AT YOUR DEALER RIGHT HAND TRACTOR NEW SIZE IN B & 10 PITCH 26 $16 GRISH BROS ST JOHN INDIANA 46373
Edition: Model Aviation - 1979/09
Page Numbers: 38, 112, 113, 114
MANY builders Old Timer RC-assisted models have successfully scaled designs up down original have gratilring results reducing Powerhouse 85% Ole Reliable 60% Westerner Scram 50% have also satisfied after enlarging Viking Panther However such scaling does always result model same flight characteristics original months fea ture illustrates such deleterious result 1940 Henry Struck designed new model meet requirements 1940 rules Wing loading requirements removed 80-oz/cu displacement rule introduced 1940 competitioa Struck named model New Ruler 60 model required weigh 48 oz six-foot design published Air Trails April/May 1940 Though prototype initially powered Brown-D Struck substituted Super Cyke New Ruler established itself potent contest machine Possessed lovely esthetics model actually looks like sport model exhibits excellent power pattern superb giide hundredplus models Struck has designed nearly 50 years modeling recently designed East wing Jetco feel New Ruler memorable New Ruler contrasts sharply ordinary designs era breaks away common boxy appearance realm highiy tuned pylon model retaining looks like real airplane quality During same time period years thereafter Struck working Bill Effingers Berkeley Models designer draftsman old Berkeley kit plans display Henry Strucks name drawn box responsible outright firms long line models such Flying Cloud Bootstraps Interstate Cadet etc Since Berkeley line included 60-sized free-flight designs such Buccaneers Cava liers Effinger chose kit New Ruler size appeal owners new highly popular 23/29-sized powerplants resultant scale-down renamed American Ace 54 rather interesting light discovery preparing three views model actually spans 52 inches 39 years Id presumed span 54 inches never measured Editors Note Buc Eflinger design Cavalier Shereshaw American Ace proved commercial success attributed its esthetics Im sure superior gliding characteristics HENRY STRUCKS AMERICAN ACE KITTED BY BERKELEY MODELS 1940 SPAN 52 AREA 432 50 IN SAM MAXENGINE I93Oc ORIGINALPLANS 5HOW19T049/ / Id -J 4 0 z 0 0 4 K 6 2 Id -J z 0 2 O 2 4 6 B 10 12 14 ROUGH COMPARISON SCALE FOR NEW RULER O 12345678910 SCALE FOR AM ACE Ace relatively simple model trim free-flight mode once gets enough lead nose adequate CG location its relatively oversized wood thicknesses complex struc tures render lead-sled glide mode stout house sport role negative result scaling down highly successful New Ruler American Ace pointed out Openers editor Bill long ago Editors Note point being areas dimensions change different orders example Doubling dimension squares area vice versa photo model constructed flown worn out six years ago Although constructed contest grade wood covered Solarfiim about light covering possible prototype weighed whopping 56 ox two-channel brick a225MAHpack resulting wing loading nearly 185 oz/sq ft Such loadings tine sport type RC completely unsatisfactory radio-assisted Old Timer would suggest anyone interested design reduce wood sizes least 1/16th make effort keep tail light forget notion thermaling model will provide hours fun sport flier Fuselage construction utilizes basic box 3/16 balsa strip formers stringers attached top bottom pylon constructed center keel 3/16 formers sides top Covering pylon best accomplished wet silk large doses patience original features removable engine firewall ignition tray stick attached used removable hatch Continued page 112 38 Model Aviation American Ace 54 powered byTD 09 Removable lower hatch 2-channel radio rudder elevator Scaled down Strucks New Ruler powered Brown Junior its FF competitive performance suffered accordingly does make nice sport job radio assist PECKS MODEL MENAGERIE PEANUT SCALE KITS $395 PIETENPOL GIPSY MOTH P PER J3 CUB ANORRASON URRULENTGANAGOR MU5TANGCOUGAR COMPLETE CATALOG $100 GA0E TO RWSER MOOR SUPPLIES 7Cat4aee P 0 BOX 2498 -MA 7LA ME5A CAUP 92041 PHONE 714 4695675 714 442-4636 WHY PAY MORE SINCE 1948 big buy high performance *FIREBALL #H30 HOT 3 volts faster starts #S20 STANDARD 24 volts general use #C15 COOL 15 volts cures pre-ignition 9RBB BLOW-OUT PROOF SEAL IS HERE 98 000000000 00 04 0000 00 @00 6 LONGER LIFE GLOW PLUGS gooses 0 0 0 0 0 0 0 0 0 0000 0004 SWANSON ASSOCIATES PO BOX lIEWAYNE NEW IEEWET 07470 0 LOWEST DRAIN flier Dont compromise fine event have just few too lazy put good finish planes Thats month Keep contest reports coming new address Bill Hager 4622 Bridge port Drive Garland TX 75043 RC Soaring/Pruss continued tram page 35 borne pack dropped 45 volts would allow about hour safe flying What makes record incredible attempt began preparations two-thirty morning sun came up schedule wind didnt wasnt until two-twelve afternoon Foka launched flight continued through night through next day finally landed six-eighteen second evening Dip wing Brian Laging company heckuvan effort Clean Living Pays Off Department does anybody wanna buy 9-volt rabbits foot know beer commercial TV shows sports celebrities having finally tears top off beer can says cheers everybody happy ever wanted run modelers ad men should have traveled east recent York Pennsylvania contest As Keith Finkenbiner recently transplanted midwesterner LSF Treasurer no wasnt run out town related story went something like Its first round York boys using oft-mentioned Don Goughnour retrieval sys tem still works like charm after two years Now retrieval portion winch has fine monofilament line attached ring end tow line plane comes off monofila ment reeled bringing hack chute ring However monofilament difficult see thats seldom problem Seldom except Don Clark Thermal Sniffler fame has Paragon air search lift What Don doesnt know has flown monofilament now draped over center wing No problem except monofilament being spooled Dons Paragon wing holddown rubber bands being sawed through sawed through Don low-key Clark some say low key has awakened during ten-minute max watched wing flutter down wondering hmmm must way out checking voltage rabbits foot Don saw fuselage get entangled monofilament weight fuselage overtook speed take-up spool parachute caused enough drag allow fuselage lowered gently ground hard luck boys yelling foul uttering some guys will anything relaunch becomes part future strategy might want consider long will take saw through 9/32-in wing rod something like Aquila Grande Donwithout missing puff pipewent CD calmly asked could get reflight Oh yes Don got reflight maxed out four four won event Cheers Dan Pruss Route 2 Box 490 Plainfiel4 IL 60544 RC Helicopters/Chesney continued page 37 starts pilot announces starting altitude minimum 20 feet Upon calling maneuver pilot stops engine Helicopter des cends controlled landing such helicopter can flown immediately afterwards engine restart helicopter lands helipad landing scored 0 10 points landing takes place within 100-foot circle around helipad #4 helipad scored 0 5 points maximum 29 Landing Maneuver proceeds smooth translational descent minimum altitude 20 feet touchdown Touchdown must soft maximum score downgrade skid touches down first long helicopter does bounce second skid touches down Dave Chesney Rt 9 Box 621A Greensborn NC 27409 RC Old Timer/Mathews continued page 38 bottom access RC unit switch course placed cockpit Wing tail construction multi-spar construction sheet-covered leading edge wing aisfoil section indeterminate lineage undercambered relatively thin double elliptical surfaces constructed sheet outlines bent 3/16 sq leading edge undercarriage semi-torque-rod singlewire unit held firewall originally grooved wooden blocks No epoxy nor apparent ly J-bolts available 1940 Editor J-bolts requiring excellent craftsmanship used could anticipate gear staying Ambroid wire tail skid attached balsa block tall end 112 Model Aviation Kraftsmanship kit processed AAMCO GOLD BALSAThis Trainer will blow apart hits ground GREATEST R/C BASIC TRAINER Design & Kit ALL TIME Ask over 25000 satisfied builders H-RAY dealers sold themSHALL WE SAY MORE Andreas Aircraft Model Co Inc US Ete 1& North St Topsijeld Mass 01983 887-8541 Support AMA Price $3995 kit per dollar bar em power HOMELITE EWFI SpuIelflR IlomeIlfe SlolnIor Textron bade oinedtogntndtbceatuthr best toe - the Super Vastipt Sopor Huetlet hoe Built 050K startIng leton whon olOole gully cooledI Heel treated black oulded p bolt prop hub Ito tIn edjuntmtlt 01 prop elultI No elagnlO IgoltIon redare weight end blbratlOn MuPlerlKopenelon ubnttrbue wIth euub englon AlumInum 0gm tttoantwlfheeuhetlpltte Two 11119 plelun wittl enlIRt benelnee front end reerrreln end both end 01 uoneoIlflg end Loop euerenglltg cod hemIhead br roeptloel power emouth 1010 end hIgh rel10bllltyl Vapor Ortetlot esoond power rsllebIllly end dureblIlIf NASIOS -Cott lut ourbot Ptbrs Ofl OdOl lOtUS --updbtlbattytb tO PROPS Hoglleezhrb-tdSobedoltu7db thoto OttEWO PtdPluto erdotedtott OddbdttpdbflUbS pedsuSPdUtTtdd dontaontthufltdUtedt SPARK PLUGS ncao - - 1db RDJt%adlhO Ptg nntattatonut dS dead - - tgs Oundre Peukeg Irroludo S boll bob entre plop s fltrottl link eOlreosf robe sin loot line CB wortnftd9Pu Gondre9000 KITS Puma -S2dddT wt IrKAVY SUn NERVO SPdcitcottu droidflOdtdttafld theltad otdtbsueucutbOddS EXTRA AMP BOX - dO BALL REARING PEAS FOR 90 SERVO - lbs EWHTANKKIT33 ClUnk3db FUEL LtNE beocut noberns tot Swelt PA HEW EWN AILERON HINGE KIT Glee lilled nylnoBbS ROILPING MAtERIAlS bemewood uluorroane robing nirurult plywood CALL FOR AVAILABILITY OF NEW KITS SELL WHAT WE FLY & SERVICE WHAT WE SELL CAN ANSWER YOUR QUESTIONS ABOUT MINAURE AIRCRAFT HAVE SPECIAL POOP SHEET -CALL-GET ON OUR MAILING LIST DEPEND ON YOUR FEEDBACK FOR CONTINOUS PRODUCT IMPROVEMENT & DEVELOPEMENT SPECIALIZE IN QUARTER SIZE Prepaid shipping charge $200 CeOeD shipping charge $400 L within continental UeSe BankAmericard Master Charge EWH Specialties Inc 607 East Abram Ste Arlington Texas 76010 817/461-1274 prices subject change notice Dealer Inquiries Welcomed Ironically although no kit manufacturer saw fit market New Ruler 1940s semi-kit available 40 years later Schmidt Custom Kits 11948 Franklin Blvd Elk Grove CA 95624 has available kit cut parts such ribs formers surface outlines included strip wood pieces hardware Wood quality fabrication excellent Write prices other semi-kits Although Ace does possess its big brothers attributes thermaling delight nonetheless builds highly interesting sport model particularly converted RC same reasons design proved good seller Berkeley Ace has such eye pleasing lines far out rut still represents exciting building flying project Just keep tail light would recom mend throttled 25cc powerplant perhaps adding inch nose Build send us picture strange times As automobiles become smaller models become larger Jumbo phenomenon has invaded Old Timer movement Cohen Longstreet flying Quadra powered 12-foot Powerhouse John Pond has 15-foot Folly II Tulp Kiel have built 15-foot Dallalre 4000 sq knows what other aslittle bitty toy airplanes emerg ing around country giants have plug-in wing panels portability drive compacts would hard pressed haul pair 7-foot wing sections obvious advantage such huge models visibility large model could remain sight flying out radio range degree visibility large objects over head dramatically demonstrated recently gas shortage forced wife Ito end What about Fluffy clouds green trees probably little breeze Marion Knights enlarged Scientific Mercury Shereshaw deadaticks recent Houston Old Timer meet Covering rayon dress lining sport things combine joys power sailpianing Bert Striegler plc September1979 113 ppP EWH Specialties TLER SUPER HUSTLER SPECIPICAIIOMS RAE METRIC Geylebooleel2N Sb I40000 SunooGtnoltn150250 ISTIIO39NG0 0492mm WRIghIIllAdo205KG ThrasI 160004100 RPM 2008 Hunllnt pruylfl04t50 FaRt20101 OyeriolOeIOlIMix price$19995 WE days drive north Dallas about 500 pm weather balloon struck watched pair antique Taylorcrafts flying slowly moving After dinner discovered semi-transparent obiect caught eye thing remained same position fYOYflO PROPELLERS Madeof polyester boil orcolor Go GRISH propeller True helical pitch airfoil win-power 2 Blade Tractor 53each 54535430d 636435d 74767850 84868865d 949697 9810-410685dneeds 114116118 Si 124125126$150 2 Blade Pasher 543 54-4636435 86854 96106Si 3 Blade Tractor 53 63 64504 3 Blade Pasher 63s043 mmBlade Metallic Aluminum color Tractor ifiB Si 86885125 96061045150 Pusher06 $150 Sizes pitches GRISI4 LARGE WOOD PROPELLERS HARDWOOD too hard minimizes chance costly plane engine damage True pitch airfoil fully finished balanced ready coating 318 BOREALL SIZES IN18 $7 68&lOPITcH 20 8 22 10 24 13 REYCKASIR little piece electronic wizardry quickly easiiy reverses direction servo travel plugged between receiver servo will work positive pulse servos e four wire Connectors NOT furnished Available unassembled kit form assembled tested 14K104Ace Servo Reverser kit $795 14K104CAce Servo Reverser assy $1150 details send $1 latest catalog Add $50 1st class return $1 hand ling direct orders 816 584-7121 IAE E/IrnJ Box ShE HIGGINSVILLE MO 64037 NEW ERA PUBLICATION CUSTOM TUNED ENGINESAEROBATIC AIRPLANES BY PORT C MORRISON COMPETITION ACCESSORIES4U PAGES I 52 PHOTOS Cox 049L051 SpecialistsU OE1AILEO DRAWINGS brochure send 15c stamp toOnly 6395 PLUS SOft POSTAGE Kuslom Kraftsmanship BrochureCATALOGS 3100 REPLA-TECH Box 2699 Laguna Hills CA 92653INTERNATIONAL icc 714 830-51624U500 MC KENZIE HWY VEGA OREGON 9745E several hours Texas covered monstrous high pressure system day surely some drift expected point turned TV discovered looking weather balloon released morning Palas tine TX National Science Foundation jumbo 450 feet diameter containing 40 million cu ft helium floating 23 miles overhead am still amazed unaided visual identifi cation object 120000 feet Apparently others switchboards Dallas went wild after sundown reflected sunlight produced pinkish cast side polyethylene balloon leading thousands UFO reports Dee B Mathews 506 S Walnu Greensburg KS 67054 writing advertisers mention read about Model Aviation mitation/Fancher continued page 45 deflection Simply stated means longer control horns bigger bellcrank Imitation uses homemade 3 circular bellcrank maintains its full 1 fulcrum entire range control movement pushrod exits bellcrank 09 bellcrank axis attached DuBro Ball Link flap horn inch flap hinge line flap elevator pushrod located 075 inches respective hinge lines classic one-to-one flap elevator ratio conven tional horn employed elevator allow use elevator slop necessary now appears ball links could have used throughout long tail moment large surface area tail have proven provide stability could hope handle provides finishing touch control system modified Custom Master Flight Handle designed Bob Baron produced Gene Martine Custom Master Products 5424 Oliver Street S Jacksonville FL 32211 Before leaving subject control surfaces lets talk bit about variable span flaps effect flight characteristics Imitation First lets once rid ourselves desire think flaps separate distinct wing Wing flaps simply part wing happen attached such way may moved up down about hinge line doing make substantial changes characteristics airfoil Reference Figure III changes significantly affect amount lift wing given area capable producing classic symmetrical stunt airfoil often referred non-lifting section inas much its top bottom surfaces mirror images result camber line line drawn equidistant top bottom surface straight line Theoretically such section zero angle attack would produce no lift due being no differential velocityand fore pressure above below wing Now hinge aft 15 20% wing surface deflect downward will have altered number things First have instantly changed uncambered non-lifting aiifoil cambered lifting Also since measure airfoils angle attack defined angle between relative wind line between leading edge trailing edge chord line have concurrently increased angle attack two items acting concert have made quantum increase amount lift produced same airfoil its natural symmetrical state apparent amount flap area important factor determin ing amount additional lift produced Rather percentage total wing span equipped high lift device significant other words wing has 15% its total area flap along its full span will produce signifi cantly lift same wing 15% its total area flap concen trated say s span So far well good Weve seen can apparently get something nothing almost instantaneously just bending back wing however small fly ointment buzzes around fact center lift almost exception located some what aft center gravity Addition ally center lift will move further aft deflection flaps concur rent increases lift angle attack As result divergent location 114 Model Aviation styles AT YOUR DEALER RIGHT HAND TRACTOR NEW SIZE IN B & 10 PITCH 26 $16 GRISH BROS ST JOHN INDIANA 46373