Duration Bob Meuser Wyvern A-B Power Model Kitted last summer Wyvern has already shown its potential Nats Designed Larry Sicuranza Richard Smiths model took third place B-Gas Open using K&B 21 spin its 9/4 prop Tips 498 sq wing layed out using parabolic development shown early Frank Zaic Model Aeronautic Yearbooks stabilizer Sheeted leading edges geodetic ribbing ensure warp flutter resistance Wyvern stands midway size between -A Firedrake already kitted fea tured September 1975 issue Model Builder magazine soon-to be-kitted 600 sq Gryfon Complete kit Wyvern sells $21 plus $150 shipping California residents add 6% der Mythos Models 684 Pecos River Court San Jose CA 95111 Czech-Mate A/2 Don Chanceys latest finest shown three-view design generally very Russian span 82 inches projected few inches less US models reduces likelihood wing flutter during zoom launches Horejsi-type circle-zoom towhook employed Incidentally keep eyeballs peeled new towhook de signed manufactured Bob Hat schek smaller lighter adjustments towhook rudder short tailboom contributes high zoom launches Bottom wing surfaces covered silk tis sue contributes greatly durability slightly increasing weight Don says has finally figured out proper Russian method zoom launchWORLD CHAMP WAKEFIELD AIRFOILS Sta 0 125 25 5 15 10 15 20 25 30 40 50 60 70 80 90 95 100 Upper 100 300* 338 531 1620* 129 835 845* 915 1005 1027 955 881 149 590 388 242 070 Lower100027088fl3411791256319j364f4OOj 464 445 f393j3i020011010001 * Thought error Coordinate tables Aeromodeller Slodellistica Sta 012525515101520253040506070809095100 Upper03 23132485665118381899086186549291906 Lower030000020408141923253 13 5353121170900 Coordinates measured drawing Modellistica 36 Model Aviation B Parabolic tips efficient take little time square ones Showing off prototype Wyvern A-B Larry Sicuranza pretty looking aircraft kitted Mythos Models ing Tie ioop end towline place around wrist towing hand Tie good-size knot towline distance 5 7 feet end towing zoom launch hold knot between thumb fore finger towing hand just right moment release knot enough slack line allow towhook dis engage ring end line Manhattan Formula presented three-view John Triolos Nats winner January issue craftily sneaked photo third-place model Now have some details Bob Clemens second-place machine See photos Weight 55 grams rubber Cov ering condenser paper throughout light coat dope fuselage Wing has 1/16 sq balsa LE TE shaped conform airfoil rounded tips 1/32 sq basswood Fuselage 1/16 sq balsa throughout Wing stabi lizer rudder landing gear mounted fuselage means balsa struts plug tissue sockets feature allows model carried rather small box Also having incidence angles adjustable handy new design Prop blades made forming sheet balsa blanks over metal can gluing blades proper spar Diameter trimmed until right prop-run obtained came out 9 inches Thats pretty small diameter 20-inch indoor model did get enough turns motor keep up 5 mm 28 sec making motor long 30 inches long fact Bob cranked 2500 turns winning flight noseblock contains short piece Continued page 92 -T 475 17 FLAT24 iz[ 473575 1/4 WASHOUT 1564 1 87W TURBULATAR1/16 HER1/IA RIBSVERY HARD BALSA IE 563565 SPRUCE CENTER RALSATIPS1/16 si/B SPRUCE1/20SHEET UCE cS RE-1-US CEECs ROVE23V44---J-114 FALSE RIBS /1/ 3/lB sq1/16 SPAR MED BALSA IE 3R PA Ad E CT E B 513 Czech Mate A/2 Sy DAN CHANCEY 147R TEAM HEMAFY TILE VS BEQO PHANT VIEW April1977 37 WVE12fl Classes As Mytho5 Models 1 snazzy looking Manhattan Formula model Bob Clemens copped second place Nets 5-1/2-minute flight Below Trick noseblock nermits interchangeable props Clemens pix tions group As long dedicated individuals choose work ganizations will flourish promote event However wouldnt help insure continuing existence groups AMA would undertake print address mail out newsletters combined Control-Line Newsletter short lead time Right away get expenses special interest groups dues would offset actual postage costs AMA would have absorb mimeo offset printing costs office help time However control-line fliers minds would justifiable expense about some comments Wynn Paul 1640 Maywick Dr Lex ington KY40504 FULL-SIZE PLANS AVAILABLE SEE PAGE 96 COX ENGINES COX/SANWA R/C SYSTEMS AIATRONICS KITS ri HOBBIES Send complete catalog 1525 E Warner Ave Santa Ana CA 92702 FF Duration/Meuser Platitude Month Regarding singlesurface airfoils eatest depth camber should one-third length section front edge total depth measured top surface chord point should one-seventh length section V E Johnson 1910 During following 66 years moved maximum-camber point rearward rate 01% per year Does anyone want take issue maximumcamber spec motorstick stick-model type thrust bearing attached feature permitted props interchanged easily Model flew left-hand circles no wing offset used rules used Nats outlined January issue after Nats Ed Whitten originated class asked comments rules suggested rules would promote easily built rugged models sort midthirties outdoor-sport-cabin look ac complish suggested doubling weight rule 8 grams limiting prop diameter 10 inches requiring two-strut landing gear prohibiting tail booms among other things Bob main interest scale models agrees others Indoor oriented want main features Nats rules promote slightly heavy versions regular Indoor Cabin models remain event cant things people So maybe need two versions event Manhattan Formula about heavier restricted Formula Frisco event already have events need Perhaps perhaps already have some dont need Enough such heady philosophy World Champ Wake Revisited Jan uary issue presented three-view World Champs-winning Wakefield Piak Chang Sun North Korea traced Czech publication mentioned tailboom appeared unrealistically thin rear apologized lack prop airfoil data Shortly after deadline issue received copies Aeromodeller England Modellistica Italy both contained additional information model including airfoil coordinates three-view eromodel ler identical presented 92 Model Aviation Continued page 37 ARTICLES WANTED Have design youd like have pub lished topic youd like write about teal editor about may worth money Modelilsilca two-page spread shows considerably detail ap parently reprinted directly Russian publication Sure enough tailboom considerably thicker drawing traced Martin Dilly Aeromodeller author states coordinates apply Suns 1974 model presumes ap plies 1975 model table Mod ellistica identical drawings airfoil two publications different night day Hah Ill plot myself expose imposter says I did sort wish hadnt say airfoil came out crooked dogs hind leg would injustice dog Any resemblance between airfoil plotted table Wakefield model living dead purely coincidental extremely unlikely totally ignoring three points fudging bit few others got fairly respectable looking foil Unfortunately fudging must done all-important upper forward region bottom surfacewhich re quired no fudgingturns out within building tolerances true circular arc although slightly bent move maximum undercamber point slightly ward center compare Modellistica airfoil other published airfoils measured calculated its coordinates measuring accuracy about 5 mils 01% closer modelers can build probably closer drawing repre sents model Note undercam ber high point 55% lead ing edge sharp both features being quite different other foil 16- 25mil diameter turbulator placed about 35% station stab section quoted 8% Clark Ythe standard nomen clature flat-bottom model sec tionalthough measures like 7% too has turbulator 12-mil diameter 3% Regarding prop Aeromodeller quotes World Champs report Free Flight News Definitely carved something like pine Indeed Model listica drawing shows extremely thin blades40 mils mostwith undercam ber about 1/16 maximum blade width 165 inchesrather narrow An 8-mil turbulator set back 013 inches hind leading edge Bob Meuser 4200 Gregory St Oak land CA 94619 FF Old-Timers/Haught Continued page 38 can set DT 2 minutes 30 points wont put best now better Fusite has improved its GloBee racing plugs de veloping new alloy almost twice strong 20000 F alloy used its original spiral glow element Ad vanced glass technology refined pro duction techniques have combined new alloy greater plug con sistency under difficult contest conditions racing plug Because racing makes toughest demands plug per formance Fusite has concentrated model other plug models have benefitted attention special interest flyers fact GloBee plugs have absolute leakproof seala hermetic* bond between glass metal pin plug body Other winners circle event demands know model thermals detriment Other such events could devised would encourage modelers search out less common elegant designs columnist certainly has no room talk last three building projects have Ohlsson-60 Playboy Sr McCoy-19 Ranger Madewell-49 Mark Clip per two prior low per formance nostalgic cabin ships Cleveland Cloudster Berklcy Mus keteer So others have fallen victim Winning Syndrome Id like present views direction Old-Timer Write address ap pears end column plugs glow plug manufacturers employ organic fiber gaskets depend mechanical pressure sealing tend oxidize during engine operation subsequently leak GloBees permanent glass-tometal bond affords positive protection against plug seal blowouts lost compres sion resultant burned-up engines make best better Because nothing too good champion ship line winners fly GbBees Because GloBee plugs put sting engine Odds Ends must OldTimers library has published Art Suhr West 218 North 5866 Maclyn Court Menomonee Falls WI 53051 70page book collection manufacturers advertisements appropriate com ments author virtually ignition engines produced plus few probably did reach production book well done magazine size format ideal reference flier collector real trip down memory lane $500 Art currently working another book consisting reprints old engine review articles published modeling press can placed waiting list like traditional building season will April 1977 93 improved last longer under high stress conditions DIVISION OF EMERSON ELECTRIC CO 6000 Feinview Ave Cincinnati Ohio
Edition: Model Aviation - 1977/04
Page Numbers: 36, 37, 92, 93
Duration Bob Meuser Wyvern A-B Power Model Kitted last summer Wyvern has already shown its potential Nats Designed Larry Sicuranza Richard Smiths model took third place B-Gas Open using K&B 21 spin its 9/4 prop Tips 498 sq wing layed out using parabolic development shown early Frank Zaic Model Aeronautic Yearbooks stabilizer Sheeted leading edges geodetic ribbing ensure warp flutter resistance Wyvern stands midway size between -A Firedrake already kitted fea tured September 1975 issue Model Builder magazine soon-to be-kitted 600 sq Gryfon Complete kit Wyvern sells $21 plus $150 shipping California residents add 6% der Mythos Models 684 Pecos River Court San Jose CA 95111 Czech-Mate A/2 Don Chanceys latest finest shown three-view design generally very Russian span 82 inches projected few inches less US models reduces likelihood wing flutter during zoom launches Horejsi-type circle-zoom towhook employed Incidentally keep eyeballs peeled new towhook de signed manufactured Bob Hat schek smaller lighter adjustments towhook rudder short tailboom contributes high zoom launches Bottom wing surfaces covered silk tis sue contributes greatly durability slightly increasing weight Don says has finally figured out proper Russian method zoom launchWORLD CHAMP WAKEFIELD AIRFOILS Sta 0 125 25 5 15 10 15 20 25 30 40 50 60 70 80 90 95 100 Upper 100 300* 338 531 1620* 129 835 845* 915 1005 1027 955 881 149 590 388 242 070 Lower100027088fl3411791256319j364f4OOj 464 445 f393j3i020011010001 * Thought error Coordinate tables Aeromodeller Slodellistica Sta 012525515101520253040506070809095100 Upper03 23132485665118381899086186549291906 Lower030000020408141923253 13 5353121170900 Coordinates measured drawing Modellistica 36 Model Aviation B Parabolic tips efficient take little time square ones Showing off prototype Wyvern A-B Larry Sicuranza pretty looking aircraft kitted Mythos Models ing Tie ioop end towline place around wrist towing hand Tie good-size knot towline distance 5 7 feet end towing zoom launch hold knot between thumb fore finger towing hand just right moment release knot enough slack line allow towhook dis engage ring end line Manhattan Formula presented three-view John Triolos Nats winner January issue craftily sneaked photo third-place model Now have some details Bob Clemens second-place machine See photos Weight 55 grams rubber Cov ering condenser paper throughout light coat dope fuselage Wing has 1/16 sq balsa LE TE shaped conform airfoil rounded tips 1/32 sq basswood Fuselage 1/16 sq balsa throughout Wing stabi lizer rudder landing gear mounted fuselage means balsa struts plug tissue sockets feature allows model carried rather small box Also having incidence angles adjustable handy new design Prop blades made forming sheet balsa blanks over metal can gluing blades proper spar Diameter trimmed until right prop-run obtained came out 9 inches Thats pretty small diameter 20-inch indoor model did get enough turns motor keep up 5 mm 28 sec making motor long 30 inches long fact Bob cranked 2500 turns winning flight noseblock contains short piece Continued page 92 -T 475 17 FLAT24 iz[ 473575 1/4 WASHOUT 1564 1 87W TURBULATAR1/16 HER1/IA RIBSVERY HARD BALSA IE 563565 SPRUCE CENTER RALSATIPS1/16 si/B SPRUCE1/20SHEET UCE cS RE-1-US CEECs ROVE23V44---J-114 FALSE RIBS /1/ 3/lB sq1/16 SPAR MED BALSA IE 3R PA Ad E CT E B 513 Czech Mate A/2 Sy DAN CHANCEY 147R TEAM HEMAFY TILE VS BEQO PHANT VIEW April1977 37 WVE12fl Classes As Mytho5 Models 1 snazzy looking Manhattan Formula model Bob Clemens copped second place Nets 5-1/2-minute flight Below Trick noseblock nermits interchangeable props Clemens pix tions group As long dedicated individuals choose work ganizations will flourish promote event However wouldnt help insure continuing existence groups AMA would undertake print address mail out newsletters combined Control-Line Newsletter short lead time Right away get expenses special interest groups dues would offset actual postage costs AMA would have absorb mimeo offset printing costs office help time However control-line fliers minds would justifiable expense about some comments Wynn Paul 1640 Maywick Dr Lex ington KY40504 FULL-SIZE PLANS AVAILABLE SEE PAGE 96 COX ENGINES COX/SANWA R/C SYSTEMS AIATRONICS KITS ri HOBBIES Send complete catalog 1525 E Warner Ave Santa Ana CA 92702 FF Duration/Meuser Platitude Month Regarding singlesurface airfoils eatest depth camber should one-third length section front edge total depth measured top surface chord point should one-seventh length section V E Johnson 1910 During following 66 years moved maximum-camber point rearward rate 01% per year Does anyone want take issue maximumcamber spec motorstick stick-model type thrust bearing attached feature permitted props interchanged easily Model flew left-hand circles no wing offset used rules used Nats outlined January issue after Nats Ed Whitten originated class asked comments rules suggested rules would promote easily built rugged models sort midthirties outdoor-sport-cabin look ac complish suggested doubling weight rule 8 grams limiting prop diameter 10 inches requiring two-strut landing gear prohibiting tail booms among other things Bob main interest scale models agrees others Indoor oriented want main features Nats rules promote slightly heavy versions regular Indoor Cabin models remain event cant things people So maybe need two versions event Manhattan Formula about heavier restricted Formula Frisco event already have events need Perhaps perhaps already have some dont need Enough such heady philosophy World Champ Wake Revisited Jan uary issue presented three-view World Champs-winning Wakefield Piak Chang Sun North Korea traced Czech publication mentioned tailboom appeared unrealistically thin rear apologized lack prop airfoil data Shortly after deadline issue received copies Aeromodeller England Modellistica Italy both contained additional information model including airfoil coordinates three-view eromodel ler identical presented 92 Model Aviation Continued page 37 ARTICLES WANTED Have design youd like have pub lished topic youd like write about teal editor about may worth money Modelilsilca two-page spread shows considerably detail ap parently reprinted directly Russian publication Sure enough tailboom considerably thicker drawing traced Martin Dilly Aeromodeller author states coordinates apply Suns 1974 model presumes ap plies 1975 model table Mod ellistica identical drawings airfoil two publications different night day Hah Ill plot myself expose imposter says I did sort wish hadnt say airfoil came out crooked dogs hind leg would injustice dog Any resemblance between airfoil plotted table Wakefield model living dead purely coincidental extremely unlikely totally ignoring three points fudging bit few others got fairly respectable looking foil Unfortunately fudging must done all-important upper forward region bottom surfacewhich re quired no fudgingturns out within building tolerances true circular arc although slightly bent move maximum undercamber point slightly ward center compare Modellistica airfoil other published airfoils measured calculated its coordinates measuring accuracy about 5 mils 01% closer modelers can build probably closer drawing repre sents model Note undercam ber high point 55% lead ing edge sharp both features being quite different other foil 16- 25mil diameter turbulator placed about 35% station stab section quoted 8% Clark Ythe standard nomen clature flat-bottom model sec tionalthough measures like 7% too has turbulator 12-mil diameter 3% Regarding prop Aeromodeller quotes World Champs report Free Flight News Definitely carved something like pine Indeed Model listica drawing shows extremely thin blades40 mils mostwith undercam ber about 1/16 maximum blade width 165 inchesrather narrow An 8-mil turbulator set back 013 inches hind leading edge Bob Meuser 4200 Gregory St Oak land CA 94619 FF Old-Timers/Haught Continued page 38 can set DT 2 minutes 30 points wont put best now better Fusite has improved its GloBee racing plugs de veloping new alloy almost twice strong 20000 F alloy used its original spiral glow element Ad vanced glass technology refined pro duction techniques have combined new alloy greater plug con sistency under difficult contest conditions racing plug Because racing makes toughest demands plug per formance Fusite has concentrated model other plug models have benefitted attention special interest flyers fact GloBee plugs have absolute leakproof seala hermetic* bond between glass metal pin plug body Other winners circle event demands know model thermals detriment Other such events could devised would encourage modelers search out less common elegant designs columnist certainly has no room talk last three building projects have Ohlsson-60 Playboy Sr McCoy-19 Ranger Madewell-49 Mark Clip per two prior low per formance nostalgic cabin ships Cleveland Cloudster Berklcy Mus keteer So others have fallen victim Winning Syndrome Id like present views direction Old-Timer Write address ap pears end column plugs glow plug manufacturers employ organic fiber gaskets depend mechanical pressure sealing tend oxidize during engine operation subsequently leak GloBees permanent glass-tometal bond affords positive protection against plug seal blowouts lost compres sion resultant burned-up engines make best better Because nothing too good champion ship line winners fly GbBees Because GloBee plugs put sting engine Odds Ends must OldTimers library has published Art Suhr West 218 North 5866 Maclyn Court Menomonee Falls WI 53051 70page book collection manufacturers advertisements appropriate com ments author virtually ignition engines produced plus few probably did reach production book well done magazine size format ideal reference flier collector real trip down memory lane $500 Art currently working another book consisting reprints old engine review articles published modeling press can placed waiting list like traditional building season will April 1977 93 improved last longer under high stress conditions DIVISION OF EMERSON ELECTRIC CO 6000 Feinview Ave Cincinnati Ohio
Edition: Model Aviation - 1977/04
Page Numbers: 36, 37, 92, 93
Duration Bob Meuser Wyvern A-B Power Model Kitted last summer Wyvern has already shown its potential Nats Designed Larry Sicuranza Richard Smiths model took third place B-Gas Open using K&B 21 spin its 9/4 prop Tips 498 sq wing layed out using parabolic development shown early Frank Zaic Model Aeronautic Yearbooks stabilizer Sheeted leading edges geodetic ribbing ensure warp flutter resistance Wyvern stands midway size between -A Firedrake already kitted fea tured September 1975 issue Model Builder magazine soon-to be-kitted 600 sq Gryfon Complete kit Wyvern sells $21 plus $150 shipping California residents add 6% der Mythos Models 684 Pecos River Court San Jose CA 95111 Czech-Mate A/2 Don Chanceys latest finest shown three-view design generally very Russian span 82 inches projected few inches less US models reduces likelihood wing flutter during zoom launches Horejsi-type circle-zoom towhook employed Incidentally keep eyeballs peeled new towhook de signed manufactured Bob Hat schek smaller lighter adjustments towhook rudder short tailboom contributes high zoom launches Bottom wing surfaces covered silk tis sue contributes greatly durability slightly increasing weight Don says has finally figured out proper Russian method zoom launchWORLD CHAMP WAKEFIELD AIRFOILS Sta 0 125 25 5 15 10 15 20 25 30 40 50 60 70 80 90 95 100 Upper 100 300* 338 531 1620* 129 835 845* 915 1005 1027 955 881 149 590 388 242 070 Lower100027088fl3411791256319j364f4OOj 464 445 f393j3i020011010001 * Thought error Coordinate tables Aeromodeller Slodellistica Sta 012525515101520253040506070809095100 Upper03 23132485665118381899086186549291906 Lower030000020408141923253 13 5353121170900 Coordinates measured drawing Modellistica 36 Model Aviation B Parabolic tips efficient take little time square ones Showing off prototype Wyvern A-B Larry Sicuranza pretty looking aircraft kitted Mythos Models ing Tie ioop end towline place around wrist towing hand Tie good-size knot towline distance 5 7 feet end towing zoom launch hold knot between thumb fore finger towing hand just right moment release knot enough slack line allow towhook dis engage ring end line Manhattan Formula presented three-view John Triolos Nats winner January issue craftily sneaked photo third-place model Now have some details Bob Clemens second-place machine See photos Weight 55 grams rubber Cov ering condenser paper throughout light coat dope fuselage Wing has 1/16 sq balsa LE TE shaped conform airfoil rounded tips 1/32 sq basswood Fuselage 1/16 sq balsa throughout Wing stabi lizer rudder landing gear mounted fuselage means balsa struts plug tissue sockets feature allows model carried rather small box Also having incidence angles adjustable handy new design Prop blades made forming sheet balsa blanks over metal can gluing blades proper spar Diameter trimmed until right prop-run obtained came out 9 inches Thats pretty small diameter 20-inch indoor model did get enough turns motor keep up 5 mm 28 sec making motor long 30 inches long fact Bob cranked 2500 turns winning flight noseblock contains short piece Continued page 92 -T 475 17 FLAT24 iz[ 473575 1/4 WASHOUT 1564 1 87W TURBULATAR1/16 HER1/IA RIBSVERY HARD BALSA IE 563565 SPRUCE CENTER RALSATIPS1/16 si/B SPRUCE1/20SHEET UCE cS RE-1-US CEECs ROVE23V44---J-114 FALSE RIBS /1/ 3/lB sq1/16 SPAR MED BALSA IE 3R PA Ad E CT E B 513 Czech Mate A/2 Sy DAN CHANCEY 147R TEAM HEMAFY TILE VS BEQO PHANT VIEW April1977 37 WVE12fl Classes As Mytho5 Models 1 snazzy looking Manhattan Formula model Bob Clemens copped second place Nets 5-1/2-minute flight Below Trick noseblock nermits interchangeable props Clemens pix tions group As long dedicated individuals choose work ganizations will flourish promote event However wouldnt help insure continuing existence groups AMA would undertake print address mail out newsletters combined Control-Line Newsletter short lead time Right away get expenses special interest groups dues would offset actual postage costs AMA would have absorb mimeo offset printing costs office help time However control-line fliers minds would justifiable expense about some comments Wynn Paul 1640 Maywick Dr Lex ington KY40504 FULL-SIZE PLANS AVAILABLE SEE PAGE 96 COX ENGINES COX/SANWA R/C SYSTEMS AIATRONICS KITS ri HOBBIES Send complete catalog 1525 E Warner Ave Santa Ana CA 92702 FF Duration/Meuser Platitude Month Regarding singlesurface airfoils eatest depth camber should one-third length section front edge total depth measured top surface chord point should one-seventh length section V E Johnson 1910 During following 66 years moved maximum-camber point rearward rate 01% per year Does anyone want take issue maximumcamber spec motorstick stick-model type thrust bearing attached feature permitted props interchanged easily Model flew left-hand circles no wing offset used rules used Nats outlined January issue after Nats Ed Whitten originated class asked comments rules suggested rules would promote easily built rugged models sort midthirties outdoor-sport-cabin look ac complish suggested doubling weight rule 8 grams limiting prop diameter 10 inches requiring two-strut landing gear prohibiting tail booms among other things Bob main interest scale models agrees others Indoor oriented want main features Nats rules promote slightly heavy versions regular Indoor Cabin models remain event cant things people So maybe need two versions event Manhattan Formula about heavier restricted Formula Frisco event already have events need Perhaps perhaps already have some dont need Enough such heady philosophy World Champ Wake Revisited Jan uary issue presented three-view World Champs-winning Wakefield Piak Chang Sun North Korea traced Czech publication mentioned tailboom appeared unrealistically thin rear apologized lack prop airfoil data Shortly after deadline issue received copies Aeromodeller England Modellistica Italy both contained additional information model including airfoil coordinates three-view eromodel ler identical presented 92 Model Aviation Continued page 37 ARTICLES WANTED Have design youd like have pub lished topic youd like write about teal editor about may worth money Modelilsilca two-page spread shows considerably detail ap parently reprinted directly Russian publication Sure enough tailboom considerably thicker drawing traced Martin Dilly Aeromodeller author states coordinates apply Suns 1974 model presumes ap plies 1975 model table Mod ellistica identical drawings airfoil two publications different night day Hah Ill plot myself expose imposter says I did sort wish hadnt say airfoil came out crooked dogs hind leg would injustice dog Any resemblance between airfoil plotted table Wakefield model living dead purely coincidental extremely unlikely totally ignoring three points fudging bit few others got fairly respectable looking foil Unfortunately fudging must done all-important upper forward region bottom surfacewhich re quired no fudgingturns out within building tolerances true circular arc although slightly bent move maximum undercamber point slightly ward center compare Modellistica airfoil other published airfoils measured calculated its coordinates measuring accuracy about 5 mils 01% closer modelers can build probably closer drawing repre sents model Note undercam ber high point 55% lead ing edge sharp both features being quite different other foil 16- 25mil diameter turbulator placed about 35% station stab section quoted 8% Clark Ythe standard nomen clature flat-bottom model sec tionalthough measures like 7% too has turbulator 12-mil diameter 3% Regarding prop Aeromodeller quotes World Champs report Free Flight News Definitely carved something like pine Indeed Model listica drawing shows extremely thin blades40 mils mostwith undercam ber about 1/16 maximum blade width 165 inchesrather narrow An 8-mil turbulator set back 013 inches hind leading edge Bob Meuser 4200 Gregory St Oak land CA 94619 FF Old-Timers/Haught Continued page 38 can set DT 2 minutes 30 points wont put best now better Fusite has improved its GloBee racing plugs de veloping new alloy almost twice strong 20000 F alloy used its original spiral glow element Ad vanced glass technology refined pro duction techniques have combined new alloy greater plug con sistency under difficult contest conditions racing plug Because racing makes toughest demands plug per formance Fusite has concentrated model other plug models have benefitted attention special interest flyers fact GloBee plugs have absolute leakproof seala hermetic* bond between glass metal pin plug body Other winners circle event demands know model thermals detriment Other such events could devised would encourage modelers search out less common elegant designs columnist certainly has no room talk last three building projects have Ohlsson-60 Playboy Sr McCoy-19 Ranger Madewell-49 Mark Clip per two prior low per formance nostalgic cabin ships Cleveland Cloudster Berklcy Mus keteer So others have fallen victim Winning Syndrome Id like present views direction Old-Timer Write address ap pears end column plugs glow plug manufacturers employ organic fiber gaskets depend mechanical pressure sealing tend oxidize during engine operation subsequently leak GloBees permanent glass-tometal bond affords positive protection against plug seal blowouts lost compres sion resultant burned-up engines make best better Because nothing too good champion ship line winners fly GbBees Because GloBee plugs put sting engine Odds Ends must OldTimers library has published Art Suhr West 218 North 5866 Maclyn Court Menomonee Falls WI 53051 70page book collection manufacturers advertisements appropriate com ments author virtually ignition engines produced plus few probably did reach production book well done magazine size format ideal reference flier collector real trip down memory lane $500 Art currently working another book consisting reprints old engine review articles published modeling press can placed waiting list like traditional building season will April 1977 93 improved last longer under high stress conditions DIVISION OF EMERSON ELECTRIC CO 6000 Feinview Ave Cincinnati Ohio
Edition: Model Aviation - 1977/04
Page Numbers: 36, 37, 92, 93
Duration Bob Meuser Wyvern A-B Power Model Kitted last summer Wyvern has already shown its potential Nats Designed Larry Sicuranza Richard Smiths model took third place B-Gas Open using K&B 21 spin its 9/4 prop Tips 498 sq wing layed out using parabolic development shown early Frank Zaic Model Aeronautic Yearbooks stabilizer Sheeted leading edges geodetic ribbing ensure warp flutter resistance Wyvern stands midway size between -A Firedrake already kitted fea tured September 1975 issue Model Builder magazine soon-to be-kitted 600 sq Gryfon Complete kit Wyvern sells $21 plus $150 shipping California residents add 6% der Mythos Models 684 Pecos River Court San Jose CA 95111 Czech-Mate A/2 Don Chanceys latest finest shown three-view design generally very Russian span 82 inches projected few inches less US models reduces likelihood wing flutter during zoom launches Horejsi-type circle-zoom towhook employed Incidentally keep eyeballs peeled new towhook de signed manufactured Bob Hat schek smaller lighter adjustments towhook rudder short tailboom contributes high zoom launches Bottom wing surfaces covered silk tis sue contributes greatly durability slightly increasing weight Don says has finally figured out proper Russian method zoom launchWORLD CHAMP WAKEFIELD AIRFOILS Sta 0 125 25 5 15 10 15 20 25 30 40 50 60 70 80 90 95 100 Upper 100 300* 338 531 1620* 129 835 845* 915 1005 1027 955 881 149 590 388 242 070 Lower100027088fl3411791256319j364f4OOj 464 445 f393j3i020011010001 * Thought error Coordinate tables Aeromodeller Slodellistica Sta 012525515101520253040506070809095100 Upper03 23132485665118381899086186549291906 Lower030000020408141923253 13 5353121170900 Coordinates measured drawing Modellistica 36 Model Aviation B Parabolic tips efficient take little time square ones Showing off prototype Wyvern A-B Larry Sicuranza pretty looking aircraft kitted Mythos Models ing Tie ioop end towline place around wrist towing hand Tie good-size knot towline distance 5 7 feet end towing zoom launch hold knot between thumb fore finger towing hand just right moment release knot enough slack line allow towhook dis engage ring end line Manhattan Formula presented three-view John Triolos Nats winner January issue craftily sneaked photo third-place model Now have some details Bob Clemens second-place machine See photos Weight 55 grams rubber Cov ering condenser paper throughout light coat dope fuselage Wing has 1/16 sq balsa LE TE shaped conform airfoil rounded tips 1/32 sq basswood Fuselage 1/16 sq balsa throughout Wing stabi lizer rudder landing gear mounted fuselage means balsa struts plug tissue sockets feature allows model carried rather small box Also having incidence angles adjustable handy new design Prop blades made forming sheet balsa blanks over metal can gluing blades proper spar Diameter trimmed until right prop-run obtained came out 9 inches Thats pretty small diameter 20-inch indoor model did get enough turns motor keep up 5 mm 28 sec making motor long 30 inches long fact Bob cranked 2500 turns winning flight noseblock contains short piece Continued page 92 -T 475 17 FLAT24 iz[ 473575 1/4 WASHOUT 1564 1 87W TURBULATAR1/16 HER1/IA RIBSVERY HARD BALSA IE 563565 SPRUCE CENTER RALSATIPS1/16 si/B SPRUCE1/20SHEET UCE cS RE-1-US CEECs ROVE23V44---J-114 FALSE RIBS /1/ 3/lB sq1/16 SPAR MED BALSA IE 3R PA Ad E CT E B 513 Czech Mate A/2 Sy DAN CHANCEY 147R TEAM HEMAFY TILE VS BEQO PHANT VIEW April1977 37 WVE12fl Classes As Mytho5 Models 1 snazzy looking Manhattan Formula model Bob Clemens copped second place Nets 5-1/2-minute flight Below Trick noseblock nermits interchangeable props Clemens pix tions group As long dedicated individuals choose work ganizations will flourish promote event However wouldnt help insure continuing existence groups AMA would undertake print address mail out newsletters combined Control-Line Newsletter short lead time Right away get expenses special interest groups dues would offset actual postage costs AMA would have absorb mimeo offset printing costs office help time However control-line fliers minds would justifiable expense about some comments Wynn Paul 1640 Maywick Dr Lex ington KY40504 FULL-SIZE PLANS AVAILABLE SEE PAGE 96 COX ENGINES COX/SANWA R/C SYSTEMS AIATRONICS KITS ri HOBBIES Send complete catalog 1525 E Warner Ave Santa Ana CA 92702 FF Duration/Meuser Platitude Month Regarding singlesurface airfoils eatest depth camber should one-third length section front edge total depth measured top surface chord point should one-seventh length section V E Johnson 1910 During following 66 years moved maximum-camber point rearward rate 01% per year Does anyone want take issue maximumcamber spec motorstick stick-model type thrust bearing attached feature permitted props interchanged easily Model flew left-hand circles no wing offset used rules used Nats outlined January issue after Nats Ed Whitten originated class asked comments rules suggested rules would promote easily built rugged models sort midthirties outdoor-sport-cabin look ac complish suggested doubling weight rule 8 grams limiting prop diameter 10 inches requiring two-strut landing gear prohibiting tail booms among other things Bob main interest scale models agrees others Indoor oriented want main features Nats rules promote slightly heavy versions regular Indoor Cabin models remain event cant things people So maybe need two versions event Manhattan Formula about heavier restricted Formula Frisco event already have events need Perhaps perhaps already have some dont need Enough such heady philosophy World Champ Wake Revisited Jan uary issue presented three-view World Champs-winning Wakefield Piak Chang Sun North Korea traced Czech publication mentioned tailboom appeared unrealistically thin rear apologized lack prop airfoil data Shortly after deadline issue received copies Aeromodeller England Modellistica Italy both contained additional information model including airfoil coordinates three-view eromodel ler identical presented 92 Model Aviation Continued page 37 ARTICLES WANTED Have design youd like have pub lished topic youd like write about teal editor about may worth money Modelilsilca two-page spread shows considerably detail ap parently reprinted directly Russian publication Sure enough tailboom considerably thicker drawing traced Martin Dilly Aeromodeller author states coordinates apply Suns 1974 model presumes ap plies 1975 model table Mod ellistica identical drawings airfoil two publications different night day Hah Ill plot myself expose imposter says I did sort wish hadnt say airfoil came out crooked dogs hind leg would injustice dog Any resemblance between airfoil plotted table Wakefield model living dead purely coincidental extremely unlikely totally ignoring three points fudging bit few others got fairly respectable looking foil Unfortunately fudging must done all-important upper forward region bottom surfacewhich re quired no fudgingturns out within building tolerances true circular arc although slightly bent move maximum undercamber point slightly ward center compare Modellistica airfoil other published airfoils measured calculated its coordinates measuring accuracy about 5 mils 01% closer modelers can build probably closer drawing repre sents model Note undercam ber high point 55% lead ing edge sharp both features being quite different other foil 16- 25mil diameter turbulator placed about 35% station stab section quoted 8% Clark Ythe standard nomen clature flat-bottom model sec tionalthough measures like 7% too has turbulator 12-mil diameter 3% Regarding prop Aeromodeller quotes World Champs report Free Flight News Definitely carved something like pine Indeed Model listica drawing shows extremely thin blades40 mils mostwith undercam ber about 1/16 maximum blade width 165 inchesrather narrow An 8-mil turbulator set back 013 inches hind leading edge Bob Meuser 4200 Gregory St Oak land CA 94619 FF Old-Timers/Haught Continued page 38 can set DT 2 minutes 30 points wont put best now better Fusite has improved its GloBee racing plugs de veloping new alloy almost twice strong 20000 F alloy used its original spiral glow element Ad vanced glass technology refined pro duction techniques have combined new alloy greater plug con sistency under difficult contest conditions racing plug Because racing makes toughest demands plug per formance Fusite has concentrated model other plug models have benefitted attention special interest flyers fact GloBee plugs have absolute leakproof seala hermetic* bond between glass metal pin plug body Other winners circle event demands know model thermals detriment Other such events could devised would encourage modelers search out less common elegant designs columnist certainly has no room talk last three building projects have Ohlsson-60 Playboy Sr McCoy-19 Ranger Madewell-49 Mark Clip per two prior low per formance nostalgic cabin ships Cleveland Cloudster Berklcy Mus keteer So others have fallen victim Winning Syndrome Id like present views direction Old-Timer Write address ap pears end column plugs glow plug manufacturers employ organic fiber gaskets depend mechanical pressure sealing tend oxidize during engine operation subsequently leak GloBees permanent glass-tometal bond affords positive protection against plug seal blowouts lost compres sion resultant burned-up engines make best better Because nothing too good champion ship line winners fly GbBees Because GloBee plugs put sting engine Odds Ends must OldTimers library has published Art Suhr West 218 North 5866 Maclyn Court Menomonee Falls WI 53051 70page book collection manufacturers advertisements appropriate com ments author virtually ignition engines produced plus few probably did reach production book well done magazine size format ideal reference flier collector real trip down memory lane $500 Art currently working another book consisting reprints old engine review articles published modeling press can placed waiting list like traditional building season will April 1977 93 improved last longer under high stress conditions DIVISION OF EMERSON ELECTRIC CO 6000 Feinview Ave Cincinnati Ohio