To Ham radio opera tors its great phe nomenon allows talking others over world CBers its noying skip clouds up chan nels RCers immune to its ef fects either type radio use can mean creased chance becoming victim interference theres advice help keep minimum Bernard L Stuecker SIX METERS Results 50 MHz have outstanding Cycle 22 amateur use band growing time Look Europe Africa J53US has worked Colorado well east coast VEl Land preceding message broadcast American Radio Relay League* ARRL station call sign WlAW Newington CT December 23 1988 part daily bulletin transmitted radio amateurs bulletin gives information concerning radio signals being propagated given date whether conditions talking distant stations favorable formation message especially inter esting Ham operators enjoy talking other amateur operators eign countries want keep eye amateur band conditions change day day season season N ~2 m r f 200 150 100 S 50 P t 0 I I 1950 60 70 80 90 2000 S c 1 z S i xi inrid pr t Having defined Ham radio message lets interpret itand explore implica tions Cycle #22 refers sunspot cycle sunspot dark area surface sun temperature approxi mately 40000 centigrade C compared rest suns surface hov ers around 6000 C indications period 1645 1715 called Maunder Min imum sunspots did occur sunspot activity resumed its normal cycle 1715 scientific observers labeled new period Cycle #1 Sunspot activity peaks approximately 11-year intervals During peak may 100 sun spots active given time during null perhaps few 5 now ap proaching peak Cycle #22 ac cording Navy scientists expected crest 1991 1992 effect sunspots perhaps accurately related magnetic activity sun associated sunspots ionize gases Earths atmosphereand sunspots greater amount ionized gas ionized blanket gas es forms reflective overhead layer causes radio signals bounced back Earth instead escaping space phenomena sometimes described skip J53U5 according sources call sign amateur radio station located Republic Guinea-Bissau small independent country Africas west coast term VEl Land ama teur shorthand Nova Scotia/New Brunswick/Prince Edward Island area Canada bulletin goes say am ateurs Colorado east coast United States parts Canada have also talked J53U5 six-meter ama teur band short course astronomy radio propagation interest publica tion about model aviation sunspot cycle peak may viewed opportunity Ham radio operators its problem Radio Control modelers RC fliers need aware overhead reflective gas Continued page 156 Gimlet/Geiger Continued page 33 2 YI6 x 4 x 48 1 x 4 x 36 1 / x 2 x 24 1 A x 6 x 36 2 1 A x 3 x 18 Balsa strips 5 A x % x 36 3 A x x 36 4 Y32 x x 36 2 % x 1 x 30 8 A x / x 24 3 A x x 36-in triangular stock 1 3A x 3A x 3-in triangular stock Other 1 /32 x 12 x 24-in aircraft plywood 1 A6 x 6 x 12-in aircraft plywood 1 I/ x 3 x 12-in aircraft plywood 1 A x 6 x 12-in aircraft plywood 2 % x 1 x 36-in balsa aileron stock 1 Set Sig SH125 landing gear mounts 1 Sig CSO14 canopy 1 A-in hardwood dowel 8 long 1 6 x 24-in medium fiberglass tape 1 Set Du-Bro aileron torque rods 2 A x 20 x 1-in nylon bolts 1 Set Rocket City aileron links 4 6-32 x 3A -in bolts 4 6-32 T nuts 4 4-40 engine mount bolts x 3 x 36 1 %2-in music wire 1 Goldberg adjustable nose gear 1 Goldberg steering arm 2 Packages Granite State iron-on gapless hinges 1 Engine mount 4 Wheel collars % 2 Large control horns 1 48-in Blue Sullivan Gold-n-rod 1 Sullivan cable pushrod 2 /16 x 36-in music wire inner pushrods Expo/Weinreich Continued page 39 A-scale V-8 engine design Technopower II maker radial engines showed three new ones Expo fivecylinder 226 cu displacement seven 316 nine 40 radi als have diameter 9 range price $139500 $199500 companys address 610 North St Chagrin Falls OH 022 Last least AMA itself did brisk business its large booth staff told people about organization took membership renewals signed up new members about 200 Expo ended happy note As doors closed people went out fairgrounds late Sunday afternoon found cold snap broken temperature above freezing ice roads beginning melt Su nspots/Stuecker Continued page 44 layer induced present upswing sun spot activity already altering radio trans missions ARRL bulletin tells us its now possible amateur operators US talk others Africa Eu rope six-meter 50 54 MHz ama teur bandthe same six-meter amateur band some us use control model air craft Until peak sunspot activity gan six-meter band capacity limited short-range communications 20 30 miles typically making ideal RC use its currently possible ama teurs talk other amateurs Africa Europe six-meter amateur band its also entirely possible African Eu ropean stations heard country Imagine being shot down some per son operating transmitter England likely someone nearby state Further propagation conditions continue improve interference may ob served higher frequencies well dont think youre immune long-distance inter ference because operate 72 MHz four-meter band What can done minimize poten 156 Model Aviation PRESENTING FL INGER THE ULTIMATE SMALL SAILPLANE HANDLAUNCH HI-STARTorSLOPE WINGSPAN 57 WEIGHT l2oz MACHINE CUT PARTS DEALERS&DIST INQUIRIES INVITEDFLINGER LJMP 110 $2995 ELECTRA L ITE-ICARUS-PANTERA METEOR-ELECTRICUS-WHISTLER PR ELUDE-COMET LARRY JOLLY MODEL PRODUCTS 5501 W COMO SANTA ANA CALIFORNIA 92703 714 826 6861 rerfect GLASS CLOTH 58 oz Full Satisfaction Full Refund Factory pro-treated perfect compatibility epoxy polyester resin *395 per yard 38 wide Price includes postage & handling Immediate shipment Minimum order rds Easy use instructions included Also ad Plain Cradle-2 Marty84 Stonefield Trail Berr SWindeor CT06074 For infowriteorcall D & R AIRCRAFT MFG PO Box 299 ales TX 78629 72-7023 Major Credh Cards Accaptad FROM IIAVEY YSTEMS ir really slick trainers little hassles building taken out box before open birds simple build pretty look small parts well sides tail feathers pre cut ready quick assembly Youll air flying own faster ever expected AT-50 four channel advanced trainer 19-30 engines scale look flies rock stable like pattern bird has wide speed range Has 50 span semi-symme trical airfoil 400 sq area Both kits feature rolled plans step-by step instructions hardware wheel pants formed gear accurately die machine cut selected woods BT-20 three channel trainer 15-25 engines Has fully sheeted flat bottom wing can built optional ailerons 50 span 400 sq area IAVEY675 TOWER LANE YSTEMS WEST CHESTER PA 19380 oRPORATIoN tial interference distant sources number measures can take reduce eliminate skywave interfer ence problems some suggestions 1 Use good quality narrow-band re ceiver conforming 1991 specifications especially important source interference transmitter operating frequency absolutely identical fre quency RC equipment 2 Use PCM radio its inherent abil ity reject interference 3 Avoid flying very high far away transmitter 4 Make sure radio equipment properly tuuled adjusted tactics will provide measure protection hits outside sources may already have noticed interfer ence radio glitches six-meter RC equipment functioned reliably past Cycle #22 could quite pos sibly cause *Contact American Radio Relay League 225 Main Street Newington CT 06111 information about ama teur radio bulletins broadcast what information contain ARRL also excellent source information about am ateur radio electronics theory short wave listening League can help get amateur operators license show build electronic equipment tennas provide easily digested information concerning electrical elec tronics theory Theres brief section current ARRL Handbook about Radio Control equipment principles RC Giant Scale/de Vries Continued page 47 new catalogs Both have added substantially copious lists photo packs well stores Scale drawings Bobs list Scale Model Research 2334 Ticonderoga Costa Mesa CA 92626 $3 Docs Scale Plans & Photo Ser vice 3209 Madison Ave Greensboro NC 27403 also $3 North American modelers Bob notes overseas air mail $250 Doc air mails catalog overseas addi tional $2 postage Emil Neelys latest Ikon NWest PO Box 306 Post Falls ID 83854 Giant Scale ver sion Curtiss Robin Emils done both OX-S Curtiss Challenger-powered ver sions venerable Robin both apparently fly delightfully good stable model yours truly remembers good old days Co met 6-ft-span Free Flight version same prototype Mine flew well Dennymite en gine up front What improvements en gines Emils design should good starting point Giant Scale novice Span 98 flying weight about 14 lb 108 powers Ikon test model An Ikon NWest catalog kits available same address three buckswhich seems popular number month Emil Agostas current project huge Bucker Jungmeister Span 863 Length 745 cowl almost foot diameter theres big bipe future contact Mr Agosta care Dry Ridge Models 59 McCurry Road Weav erville NC 28787 indicates building drawings will run $60 per set should ready column appears final word month about 89 IMAA Rally Giants Les Hard editor High Flight notes years go will take place June 14-18 Odessa TX contact person Robbie Carson 6576 Amber Drive Odessa TX 79762 phone 915 368-5874 Pre-registration landing fee $15 June 1 on-site reg istration will $20 Like other IMAA rallies big un will relaxed fly/gab fest us Gi ant Scalers RC Slope Soaring/Triebes Continued page 49 ment flew again again Nothing seemed help about give up donate wing release tension up walked Jim Slatt Jim Slope masters hes made lot hand-shaped wooden wings told him what happening plane said maybe done poor job wing looked very carefully few minutes stated looked him like very good wing proper washout tips clean Phil lips entry leading edge saw nothing wrong suggested put away bring Out some other day wind blow ing hard fairly straight told him Theres plenty lift out Jim said strength wind can misleading should never judge flight characteristics new plane just days flight went tell once designed wing sure performer selected lowest density balsa out Continued page 161 May1989 157 4 w
Edition: Model Aviation - 1989/05
Page Numbers: 44, 156, 157
To Ham radio opera tors its great phe nomenon allows talking others over world CBers its noying skip clouds up chan nels RCers immune to its ef fects either type radio use can mean creased chance becoming victim interference theres advice help keep minimum Bernard L Stuecker SIX METERS Results 50 MHz have outstanding Cycle 22 amateur use band growing time Look Europe Africa J53US has worked Colorado well east coast VEl Land preceding message broadcast American Radio Relay League* ARRL station call sign WlAW Newington CT December 23 1988 part daily bulletin transmitted radio amateurs bulletin gives information concerning radio signals being propagated given date whether conditions talking distant stations favorable formation message especially inter esting Ham operators enjoy talking other amateur operators eign countries want keep eye amateur band conditions change day day season season N ~2 m r f 200 150 100 S 50 P t 0 I I 1950 60 70 80 90 2000 S c 1 z S i xi inrid pr t Having defined Ham radio message lets interpret itand explore implica tions Cycle #22 refers sunspot cycle sunspot dark area surface sun temperature approxi mately 40000 centigrade C compared rest suns surface hov ers around 6000 C indications period 1645 1715 called Maunder Min imum sunspots did occur sunspot activity resumed its normal cycle 1715 scientific observers labeled new period Cycle #1 Sunspot activity peaks approximately 11-year intervals During peak may 100 sun spots active given time during null perhaps few 5 now ap proaching peak Cycle #22 ac cording Navy scientists expected crest 1991 1992 effect sunspots perhaps accurately related magnetic activity sun associated sunspots ionize gases Earths atmosphereand sunspots greater amount ionized gas ionized blanket gas es forms reflective overhead layer causes radio signals bounced back Earth instead escaping space phenomena sometimes described skip J53U5 according sources call sign amateur radio station located Republic Guinea-Bissau small independent country Africas west coast term VEl Land ama teur shorthand Nova Scotia/New Brunswick/Prince Edward Island area Canada bulletin goes say am ateurs Colorado east coast United States parts Canada have also talked J53U5 six-meter ama teur band short course astronomy radio propagation interest publica tion about model aviation sunspot cycle peak may viewed opportunity Ham radio operators its problem Radio Control modelers RC fliers need aware overhead reflective gas Continued page 156 Gimlet/Geiger Continued page 33 2 YI6 x 4 x 48 1 x 4 x 36 1 / x 2 x 24 1 A x 6 x 36 2 1 A x 3 x 18 Balsa strips 5 A x % x 36 3 A x x 36 4 Y32 x x 36 2 % x 1 x 30 8 A x / x 24 3 A x x 36-in triangular stock 1 3A x 3A x 3-in triangular stock Other 1 /32 x 12 x 24-in aircraft plywood 1 A6 x 6 x 12-in aircraft plywood 1 I/ x 3 x 12-in aircraft plywood 1 A x 6 x 12-in aircraft plywood 2 % x 1 x 36-in balsa aileron stock 1 Set Sig SH125 landing gear mounts 1 Sig CSO14 canopy 1 A-in hardwood dowel 8 long 1 6 x 24-in medium fiberglass tape 1 Set Du-Bro aileron torque rods 2 A x 20 x 1-in nylon bolts 1 Set Rocket City aileron links 4 6-32 x 3A -in bolts 4 6-32 T nuts 4 4-40 engine mount bolts x 3 x 36 1 %2-in music wire 1 Goldberg adjustable nose gear 1 Goldberg steering arm 2 Packages Granite State iron-on gapless hinges 1 Engine mount 4 Wheel collars % 2 Large control horns 1 48-in Blue Sullivan Gold-n-rod 1 Sullivan cable pushrod 2 /16 x 36-in music wire inner pushrods Expo/Weinreich Continued page 39 A-scale V-8 engine design Technopower II maker radial engines showed three new ones Expo fivecylinder 226 cu displacement seven 316 nine 40 radi als have diameter 9 range price $139500 $199500 companys address 610 North St Chagrin Falls OH 022 Last least AMA itself did brisk business its large booth staff told people about organization took membership renewals signed up new members about 200 Expo ended happy note As doors closed people went out fairgrounds late Sunday afternoon found cold snap broken temperature above freezing ice roads beginning melt Su nspots/Stuecker Continued page 44 layer induced present upswing sun spot activity already altering radio trans missions ARRL bulletin tells us its now possible amateur operators US talk others Africa Eu rope six-meter 50 54 MHz ama teur bandthe same six-meter amateur band some us use control model air craft Until peak sunspot activity gan six-meter band capacity limited short-range communications 20 30 miles typically making ideal RC use its currently possible ama teurs talk other amateurs Africa Europe six-meter amateur band its also entirely possible African Eu ropean stations heard country Imagine being shot down some per son operating transmitter England likely someone nearby state Further propagation conditions continue improve interference may ob served higher frequencies well dont think youre immune long-distance inter ference because operate 72 MHz four-meter band What can done minimize poten 156 Model Aviation PRESENTING FL INGER THE ULTIMATE SMALL SAILPLANE HANDLAUNCH HI-STARTorSLOPE WINGSPAN 57 WEIGHT l2oz MACHINE CUT PARTS DEALERS&DIST INQUIRIES INVITEDFLINGER LJMP 110 $2995 ELECTRA L ITE-ICARUS-PANTERA METEOR-ELECTRICUS-WHISTLER PR ELUDE-COMET LARRY JOLLY MODEL PRODUCTS 5501 W COMO SANTA ANA CALIFORNIA 92703 714 826 6861 rerfect GLASS CLOTH 58 oz Full Satisfaction Full Refund Factory pro-treated perfect compatibility epoxy polyester resin *395 per yard 38 wide Price includes postage & handling Immediate shipment Minimum order rds Easy use instructions included Also ad Plain Cradle-2 Marty84 Stonefield Trail Berr SWindeor CT06074 For infowriteorcall D & R AIRCRAFT MFG PO Box 299 ales TX 78629 72-7023 Major Credh Cards Accaptad FROM IIAVEY YSTEMS ir really slick trainers little hassles building taken out box before open birds simple build pretty look small parts well sides tail feathers pre cut ready quick assembly Youll air flying own faster ever expected AT-50 four channel advanced trainer 19-30 engines scale look flies rock stable like pattern bird has wide speed range Has 50 span semi-symme trical airfoil 400 sq area Both kits feature rolled plans step-by step instructions hardware wheel pants formed gear accurately die machine cut selected woods BT-20 three channel trainer 15-25 engines Has fully sheeted flat bottom wing can built optional ailerons 50 span 400 sq area IAVEY675 TOWER LANE YSTEMS WEST CHESTER PA 19380 oRPORATIoN tial interference distant sources number measures can take reduce eliminate skywave interfer ence problems some suggestions 1 Use good quality narrow-band re ceiver conforming 1991 specifications especially important source interference transmitter operating frequency absolutely identical fre quency RC equipment 2 Use PCM radio its inherent abil ity reject interference 3 Avoid flying very high far away transmitter 4 Make sure radio equipment properly tuuled adjusted tactics will provide measure protection hits outside sources may already have noticed interfer ence radio glitches six-meter RC equipment functioned reliably past Cycle #22 could quite pos sibly cause *Contact American Radio Relay League 225 Main Street Newington CT 06111 information about ama teur radio bulletins broadcast what information contain ARRL also excellent source information about am ateur radio electronics theory short wave listening League can help get amateur operators license show build electronic equipment tennas provide easily digested information concerning electrical elec tronics theory Theres brief section current ARRL Handbook about Radio Control equipment principles RC Giant Scale/de Vries Continued page 47 new catalogs Both have added substantially copious lists photo packs well stores Scale drawings Bobs list Scale Model Research 2334 Ticonderoga Costa Mesa CA 92626 $3 Docs Scale Plans & Photo Ser vice 3209 Madison Ave Greensboro NC 27403 also $3 North American modelers Bob notes overseas air mail $250 Doc air mails catalog overseas addi tional $2 postage Emil Neelys latest Ikon NWest PO Box 306 Post Falls ID 83854 Giant Scale ver sion Curtiss Robin Emils done both OX-S Curtiss Challenger-powered ver sions venerable Robin both apparently fly delightfully good stable model yours truly remembers good old days Co met 6-ft-span Free Flight version same prototype Mine flew well Dennymite en gine up front What improvements en gines Emils design should good starting point Giant Scale novice Span 98 flying weight about 14 lb 108 powers Ikon test model An Ikon NWest catalog kits available same address three buckswhich seems popular number month Emil Agostas current project huge Bucker Jungmeister Span 863 Length 745 cowl almost foot diameter theres big bipe future contact Mr Agosta care Dry Ridge Models 59 McCurry Road Weav erville NC 28787 indicates building drawings will run $60 per set should ready column appears final word month about 89 IMAA Rally Giants Les Hard editor High Flight notes years go will take place June 14-18 Odessa TX contact person Robbie Carson 6576 Amber Drive Odessa TX 79762 phone 915 368-5874 Pre-registration landing fee $15 June 1 on-site reg istration will $20 Like other IMAA rallies big un will relaxed fly/gab fest us Gi ant Scalers RC Slope Soaring/Triebes Continued page 49 ment flew again again Nothing seemed help about give up donate wing release tension up walked Jim Slatt Jim Slope masters hes made lot hand-shaped wooden wings told him what happening plane said maybe done poor job wing looked very carefully few minutes stated looked him like very good wing proper washout tips clean Phil lips entry leading edge saw nothing wrong suggested put away bring Out some other day wind blow ing hard fairly straight told him Theres plenty lift out Jim said strength wind can misleading should never judge flight characteristics new plane just days flight went tell once designed wing sure performer selected lowest density balsa out Continued page 161 May1989 157 4 w
Edition: Model Aviation - 1989/05
Page Numbers: 44, 156, 157
To Ham radio opera tors its great phe nomenon allows talking others over world CBers its noying skip clouds up chan nels RCers immune to its ef fects either type radio use can mean creased chance becoming victim interference theres advice help keep minimum Bernard L Stuecker SIX METERS Results 50 MHz have outstanding Cycle 22 amateur use band growing time Look Europe Africa J53US has worked Colorado well east coast VEl Land preceding message broadcast American Radio Relay League* ARRL station call sign WlAW Newington CT December 23 1988 part daily bulletin transmitted radio amateurs bulletin gives information concerning radio signals being propagated given date whether conditions talking distant stations favorable formation message especially inter esting Ham operators enjoy talking other amateur operators eign countries want keep eye amateur band conditions change day day season season N ~2 m r f 200 150 100 S 50 P t 0 I I 1950 60 70 80 90 2000 S c 1 z S i xi inrid pr t Having defined Ham radio message lets interpret itand explore implica tions Cycle #22 refers sunspot cycle sunspot dark area surface sun temperature approxi mately 40000 centigrade C compared rest suns surface hov ers around 6000 C indications period 1645 1715 called Maunder Min imum sunspots did occur sunspot activity resumed its normal cycle 1715 scientific observers labeled new period Cycle #1 Sunspot activity peaks approximately 11-year intervals During peak may 100 sun spots active given time during null perhaps few 5 now ap proaching peak Cycle #22 ac cording Navy scientists expected crest 1991 1992 effect sunspots perhaps accurately related magnetic activity sun associated sunspots ionize gases Earths atmosphereand sunspots greater amount ionized gas ionized blanket gas es forms reflective overhead layer causes radio signals bounced back Earth instead escaping space phenomena sometimes described skip J53U5 according sources call sign amateur radio station located Republic Guinea-Bissau small independent country Africas west coast term VEl Land ama teur shorthand Nova Scotia/New Brunswick/Prince Edward Island area Canada bulletin goes say am ateurs Colorado east coast United States parts Canada have also talked J53U5 six-meter ama teur band short course astronomy radio propagation interest publica tion about model aviation sunspot cycle peak may viewed opportunity Ham radio operators its problem Radio Control modelers RC fliers need aware overhead reflective gas Continued page 156 Gimlet/Geiger Continued page 33 2 YI6 x 4 x 48 1 x 4 x 36 1 / x 2 x 24 1 A x 6 x 36 2 1 A x 3 x 18 Balsa strips 5 A x % x 36 3 A x x 36 4 Y32 x x 36 2 % x 1 x 30 8 A x / x 24 3 A x x 36-in triangular stock 1 3A x 3A x 3-in triangular stock Other 1 /32 x 12 x 24-in aircraft plywood 1 A6 x 6 x 12-in aircraft plywood 1 I/ x 3 x 12-in aircraft plywood 1 A x 6 x 12-in aircraft plywood 2 % x 1 x 36-in balsa aileron stock 1 Set Sig SH125 landing gear mounts 1 Sig CSO14 canopy 1 A-in hardwood dowel 8 long 1 6 x 24-in medium fiberglass tape 1 Set Du-Bro aileron torque rods 2 A x 20 x 1-in nylon bolts 1 Set Rocket City aileron links 4 6-32 x 3A -in bolts 4 6-32 T nuts 4 4-40 engine mount bolts x 3 x 36 1 %2-in music wire 1 Goldberg adjustable nose gear 1 Goldberg steering arm 2 Packages Granite State iron-on gapless hinges 1 Engine mount 4 Wheel collars % 2 Large control horns 1 48-in Blue Sullivan Gold-n-rod 1 Sullivan cable pushrod 2 /16 x 36-in music wire inner pushrods Expo/Weinreich Continued page 39 A-scale V-8 engine design Technopower II maker radial engines showed three new ones Expo fivecylinder 226 cu displacement seven 316 nine 40 radi als have diameter 9 range price $139500 $199500 companys address 610 North St Chagrin Falls OH 022 Last least AMA itself did brisk business its large booth staff told people about organization took membership renewals signed up new members about 200 Expo ended happy note As doors closed people went out fairgrounds late Sunday afternoon found cold snap broken temperature above freezing ice roads beginning melt Su nspots/Stuecker Continued page 44 layer induced present upswing sun spot activity already altering radio trans missions ARRL bulletin tells us its now possible amateur operators US talk others Africa Eu rope six-meter 50 54 MHz ama teur bandthe same six-meter amateur band some us use control model air craft Until peak sunspot activity gan six-meter band capacity limited short-range communications 20 30 miles typically making ideal RC use its currently possible ama teurs talk other amateurs Africa Europe six-meter amateur band its also entirely possible African Eu ropean stations heard country Imagine being shot down some per son operating transmitter England likely someone nearby state Further propagation conditions continue improve interference may ob served higher frequencies well dont think youre immune long-distance inter ference because operate 72 MHz four-meter band What can done minimize poten 156 Model Aviation PRESENTING FL INGER THE ULTIMATE SMALL SAILPLANE HANDLAUNCH HI-STARTorSLOPE WINGSPAN 57 WEIGHT l2oz MACHINE CUT PARTS DEALERS&DIST INQUIRIES INVITEDFLINGER LJMP 110 $2995 ELECTRA L ITE-ICARUS-PANTERA METEOR-ELECTRICUS-WHISTLER PR ELUDE-COMET LARRY JOLLY MODEL PRODUCTS 5501 W COMO SANTA ANA CALIFORNIA 92703 714 826 6861 rerfect GLASS CLOTH 58 oz Full Satisfaction Full Refund Factory pro-treated perfect compatibility epoxy polyester resin *395 per yard 38 wide Price includes postage & handling Immediate shipment Minimum order rds Easy use instructions included Also ad Plain Cradle-2 Marty84 Stonefield Trail Berr SWindeor CT06074 For infowriteorcall D & R AIRCRAFT MFG PO Box 299 ales TX 78629 72-7023 Major Credh Cards Accaptad FROM IIAVEY YSTEMS ir really slick trainers little hassles building taken out box before open birds simple build pretty look small parts well sides tail feathers pre cut ready quick assembly Youll air flying own faster ever expected AT-50 four channel advanced trainer 19-30 engines scale look flies rock stable like pattern bird has wide speed range Has 50 span semi-symme trical airfoil 400 sq area Both kits feature rolled plans step-by step instructions hardware wheel pants formed gear accurately die machine cut selected woods BT-20 three channel trainer 15-25 engines Has fully sheeted flat bottom wing can built optional ailerons 50 span 400 sq area IAVEY675 TOWER LANE YSTEMS WEST CHESTER PA 19380 oRPORATIoN tial interference distant sources number measures can take reduce eliminate skywave interfer ence problems some suggestions 1 Use good quality narrow-band re ceiver conforming 1991 specifications especially important source interference transmitter operating frequency absolutely identical fre quency RC equipment 2 Use PCM radio its inherent abil ity reject interference 3 Avoid flying very high far away transmitter 4 Make sure radio equipment properly tuuled adjusted tactics will provide measure protection hits outside sources may already have noticed interfer ence radio glitches six-meter RC equipment functioned reliably past Cycle #22 could quite pos sibly cause *Contact American Radio Relay League 225 Main Street Newington CT 06111 information about ama teur radio bulletins broadcast what information contain ARRL also excellent source information about am ateur radio electronics theory short wave listening League can help get amateur operators license show build electronic equipment tennas provide easily digested information concerning electrical elec tronics theory Theres brief section current ARRL Handbook about Radio Control equipment principles RC Giant Scale/de Vries Continued page 47 new catalogs Both have added substantially copious lists photo packs well stores Scale drawings Bobs list Scale Model Research 2334 Ticonderoga Costa Mesa CA 92626 $3 Docs Scale Plans & Photo Ser vice 3209 Madison Ave Greensboro NC 27403 also $3 North American modelers Bob notes overseas air mail $250 Doc air mails catalog overseas addi tional $2 postage Emil Neelys latest Ikon NWest PO Box 306 Post Falls ID 83854 Giant Scale ver sion Curtiss Robin Emils done both OX-S Curtiss Challenger-powered ver sions venerable Robin both apparently fly delightfully good stable model yours truly remembers good old days Co met 6-ft-span Free Flight version same prototype Mine flew well Dennymite en gine up front What improvements en gines Emils design should good starting point Giant Scale novice Span 98 flying weight about 14 lb 108 powers Ikon test model An Ikon NWest catalog kits available same address three buckswhich seems popular number month Emil Agostas current project huge Bucker Jungmeister Span 863 Length 745 cowl almost foot diameter theres big bipe future contact Mr Agosta care Dry Ridge Models 59 McCurry Road Weav erville NC 28787 indicates building drawings will run $60 per set should ready column appears final word month about 89 IMAA Rally Giants Les Hard editor High Flight notes years go will take place June 14-18 Odessa TX contact person Robbie Carson 6576 Amber Drive Odessa TX 79762 phone 915 368-5874 Pre-registration landing fee $15 June 1 on-site reg istration will $20 Like other IMAA rallies big un will relaxed fly/gab fest us Gi ant Scalers RC Slope Soaring/Triebes Continued page 49 ment flew again again Nothing seemed help about give up donate wing release tension up walked Jim Slatt Jim Slope masters hes made lot hand-shaped wooden wings told him what happening plane said maybe done poor job wing looked very carefully few minutes stated looked him like very good wing proper washout tips clean Phil lips entry leading edge saw nothing wrong suggested put away bring Out some other day wind blow ing hard fairly straight told him Theres plenty lift out Jim said strength wind can misleading should never judge flight characteristics new plane just days flight went tell once designed wing sure performer selected lowest density balsa out Continued page 161 May1989 157 4 w