AH merry month May flying season well under way parts country soon will main topic months column inspired car person also flies RCa 6-ft PiUs rigged smoke Joe Sullivan hails Dallas TX concerned use dual-servo redundant installations among Giant Scale birds terested specifically Joe wondered what would happen aileron failed ex treme end its travel assuming other servo functioned normally noted Joe Ive seen servo fail hard-over Joe Bridi flying Dirty Birdy club field rudder servo locked up full-right position course Joe master RC pilot able land model aircraft safely did reducing speed model point just above stalling action tended reduce right turn effect jammed rudder going maximum rate ailerons Joe able maintain wings le vel permitted model make wide sweeping right turn order line up runway landed normally situation probably serious locked-servo condition could find ourselves rudder powerful turn ing control aircraft functions right down stall thats can spin airplanes recover Its effect air speed-dependentgreater high speeds less aircraft slows down condition Joe Sullivan posedwith aileron servo locked full travelis much less critical situation other aileron servo functions properly holding full opposite failed aileron should maintain level flight touch opposite rudder should help could obtained held applying rud der aileron trims event slowing model down should help instance well hard-over failure split elevator system servo could hairy situation depending altitude attitude model occurs altitude surviving half elevator system should adequate maintain level flight attitude model relative horizon can controlled adding pullingoff engine power Coming back throttle should allow nose drop bit power nose should rise landing under conditions might bit dicey particularly engine operating 46 Model Aviation Radio Control Giant Scale John de Vries Colonel USAF Ret 4610 Moffat Ln Colorado Springs CO 80915 happens best us Phil Kents Norwegian Hawker Fury participated mid-air fly-in Phil landed safely despite damage left aileron Quarter-scale Desoutter Monoplane L Arthur Sean Liverpool England Model Club dont see flight line Idaho mountains behind Ikon NWssts new Curtiss Robin R Wingspan 1s98 fifth-scale craft model OX-5-powered ver sion prototype Emil Neely will also offer kit Curtiss Challenger-powered radial engine version same bird Dry Ridge Models Bucker Jungmelster L -scale Construction drawings will available soon Prototype biplane owned flown Art Yaden Emil Agosta has photo documentation Theres info column Giant Der Jaeger bipe R built flown Maurice Thompson Leeds England Power Kavan flat twin four-stroke idle power Itd hot fast real world servo failure extreme travel isnt common occurrence Yours truly has seen few cases failure mechanical affected control surface streamlined itself due aerodynamic pressures real problem servo failure has two dis tinct parts First RC flier has recognize condition early panic possible second has maintain cool Its another situation helps have observer stand ing fly can big help rec ommending series control movements overcome effects servo failure calm voice Failure engine servo either extreme isnt difficult cope Low engine bring bird around best landing possible maintaining models speed well above stalling point Full borecircle model un til fuel runs Out latter situation stallation servo-controlled shutoff switch Giant gas-burners could big help coping high-engine-speed servo failure Line things up shut off hummer make nor mal landing multiengined models engine-out condi tion may very difficult diagnose bird will slow down detectably may have ten dency roll severely latter usually con trolled pulling power good engine slowing model using ailerons rudder overcome rolling turning tendency Within reasonable limits speed model should maintained until landing assured ensures aerodynamic controls main tain efficiency keep bird level per mit single-engine go-around first landing approach has aborted world full-sized alrcraft speed maintained engine out defined single-engine out airspeed its usually 1520 mph above stalling speed final analysis airborne servo malfunc tion isnt something happens day does becomes true emergency de mands bunch cool part pilot smooth gentle applications corrective coun ter control pressures landing earliest possible time consistent maintenance model control Its something can prac tice consideration should thought out beforehand Redundant control sys tems Giant birds may save hash event emergency Good friend Phil Kent writes Scale col umn British RCM&E magazine has pro vided us news interesting organization Jolly Olde England Its called Large Model Association has RC interests parallel Partner Dick Phillips wrote LMA provided us fascinating booklet Its UK Large Model Aircraft Register Di rectory notes existence 568 registered Giant models LMA assigns registration number example model LM AAO 100-in-span DeHavilland Comet built flown RL Rawle Chorleywood Fasci nating youre interested getting contact British Giant Scale compadres LMAs ad dress Mrs Joan Lockwood-Goose Westerley 8 Bilton Lane Dunchurch Rugby CV22 6PT England docinnentation front both Doc Pe pino Bob Banka have recently forwarded Continued page 1S7 battery needs call write B&P Associates PO Box 22054 Waco TX 76702-2054 817662-5587 new electric starter battery pack cuts cord has always tied starter power panel Discover freedom being able start plane wherever added safety less wire get caught prop charge hefty 4 Amp/hour pack will take through weekend flying power enough spare dont stop have Ni-Cads virtually size imaginable cut experimenter free design whatever takes make yours best setup field May 1989 47 Invisible SvitchTM direct replacement radio on/off switch Und Ye Call Der Svitch" Der Svitch" on-board magnetic on/off switch radio equipment hides inside fuselage activated outside included small bar magnet shown above cut awful holes fuselage. Isnt time made Der Svitch Ideal Any A/C Plane Boat Car Scale Proiects Water Flyera Safe use Consumes no power ation free h resistant atible radio Optional red LED lamp inatalls plane dash wing indicate radio aisle Simple Install Futaba Airtronics radios order Model 1402 simply unplug on/off switch plug Der Svitch order Model 1401 use connectors old on/oft switch instructions supplied Der Syitch includes bar magnet activator shown above ModelDescriptionPrice ea 1401Der Svitch activator no connectors twisted leads$1995 ea 14O1LEDDer Svitch activator no connectors twisted leads option leads external LED #1405$2495 1402*Der Svisch activator connectors tor Futaba Airtronics$2495 ea 1402LED*Der Svisch activator connectors Futaba Airtronics option leads external LED #1405*$2995 ea 1405LED red lamp w/24 twisted leads Models 1401 LED 1402LED$595 ea * ordering Model 1402 1 4O2LED please specify radio connector types Connectors available Futaba J Futaba G Airtronics radios order include name address specify models needed include check money order send Ragan/Barker Group 5050 Quorum Otive Suite 741 Dallas Texas 75240 Please add $2 50 per order cover UPS charges Texas residents add sales tax Credit Card orders call between g 00 500 Central Time M-F Please allow 2-4 weeks delivery _____ Patent Pending Dealer Inquiries Invited Europes leading manufacturer pilots supply fully positional figures National Scale Champs dress pilots known apparel Accessories include helmets goggles sunglasses bobble hats baseball caps floppy hats bone domes oxygen masks maewests popular types WWI WWII Sports piece suit stripes colours NATO piece suit map pockets olive green Glider pilots turtle neck sweaters floppy hat sunglasses Standard pilots tan pants simulated leather jacket fur collar baseball hat sunglasses pilots lightest ever come painted dressed ready fly 1/6 scale 2 oz $20001/4 scale 4 oz $2800 1/5 scale 3 oz $2400 1/3 scale 3200 Plus $500 postage packIng AIrmail fast delivety send phone Visa orMastercharge number AH DESIGNS 7g Pen-y-Mass Ave Rhyl Clwyd 1118 4E0 UK Tel 745-53g87 ___ B&P Associates Gives Total Flight Line FREEDOM 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: 46, 47, 157
AH merry month May flying season well under way parts country soon will main topic months column inspired car person also flies RCa 6-ft PiUs rigged smoke Joe Sullivan hails Dallas TX concerned use dual-servo redundant installations among Giant Scale birds terested specifically Joe wondered what would happen aileron failed ex treme end its travel assuming other servo functioned normally noted Joe Ive seen servo fail hard-over Joe Bridi flying Dirty Birdy club field rudder servo locked up full-right position course Joe master RC pilot able land model aircraft safely did reducing speed model point just above stalling action tended reduce right turn effect jammed rudder going maximum rate ailerons Joe able maintain wings le vel permitted model make wide sweeping right turn order line up runway landed normally situation probably serious locked-servo condition could find ourselves rudder powerful turn ing control aircraft functions right down stall thats can spin airplanes recover Its effect air speed-dependentgreater high speeds less aircraft slows down condition Joe Sullivan posedwith aileron servo locked full travelis much less critical situation other aileron servo functions properly holding full opposite failed aileron should maintain level flight touch opposite rudder should help could obtained held applying rud der aileron trims event slowing model down should help instance well hard-over failure split elevator system servo could hairy situation depending altitude attitude model occurs altitude surviving half elevator system should adequate maintain level flight attitude model relative horizon can controlled adding pullingoff engine power Coming back throttle should allow nose drop bit power nose should rise landing under conditions might bit dicey particularly engine operating 46 Model Aviation Radio Control Giant Scale John de Vries Colonel USAF Ret 4610 Moffat Ln Colorado Springs CO 80915 happens best us Phil Kents Norwegian Hawker Fury participated mid-air fly-in Phil landed safely despite damage left aileron Quarter-scale Desoutter Monoplane L Arthur Sean Liverpool England Model Club dont see flight line Idaho mountains behind Ikon NWssts new Curtiss Robin R Wingspan 1s98 fifth-scale craft model OX-5-powered ver sion prototype Emil Neely will also offer kit Curtiss Challenger-powered radial engine version same bird Dry Ridge Models Bucker Jungmelster L -scale Construction drawings will available soon Prototype biplane owned flown Art Yaden Emil Agosta has photo documentation Theres info column Giant Der Jaeger bipe R built flown Maurice Thompson Leeds England Power Kavan flat twin four-stroke idle power Itd hot fast real world servo failure extreme travel isnt common occurrence Yours truly has seen few cases failure mechanical affected control surface streamlined itself due aerodynamic pressures real problem servo failure has two dis tinct parts First RC flier has recognize condition early panic possible second has maintain cool Its another situation helps have observer stand ing fly can big help rec ommending series control movements overcome effects servo failure calm voice Failure engine servo either extreme isnt difficult cope Low engine bring bird around best landing possible maintaining models speed well above stalling point Full borecircle model un til fuel runs Out latter situation stallation servo-controlled shutoff switch Giant gas-burners could big help coping high-engine-speed servo failure Line things up shut off hummer make nor mal landing multiengined models engine-out condi tion may very difficult diagnose bird will slow down detectably may have ten dency roll severely latter usually con trolled pulling power good engine slowing model using ailerons rudder overcome rolling turning tendency Within reasonable limits speed model should maintained until landing assured ensures aerodynamic controls main tain efficiency keep bird level per mit single-engine go-around first landing approach has aborted world full-sized alrcraft speed maintained engine out defined single-engine out airspeed its usually 1520 mph above stalling speed final analysis airborne servo malfunc tion isnt something happens day does becomes true emergency de mands bunch cool part pilot smooth gentle applications corrective coun ter control pressures landing earliest possible time consistent maintenance model control Its something can prac tice consideration should thought out beforehand Redundant control sys tems Giant birds may save hash event emergency Good friend Phil Kent writes Scale col umn British RCM&E magazine has pro vided us news interesting organization Jolly Olde England Its called Large Model Association has RC interests parallel Partner Dick Phillips wrote LMA provided us fascinating booklet Its UK Large Model Aircraft Register Di rectory notes existence 568 registered Giant models LMA assigns registration number example model LM AAO 100-in-span DeHavilland Comet built flown RL Rawle Chorleywood Fasci nating youre interested getting contact British Giant Scale compadres LMAs ad dress Mrs Joan Lockwood-Goose Westerley 8 Bilton Lane Dunchurch Rugby CV22 6PT England docinnentation front both Doc Pe pino Bob Banka have recently forwarded Continued page 1S7 battery needs call write B&P Associates PO Box 22054 Waco TX 76702-2054 817662-5587 new electric starter battery pack cuts cord has always tied starter power panel Discover freedom being able start plane wherever added safety less wire get caught prop charge hefty 4 Amp/hour pack will take through weekend flying power enough spare dont stop have Ni-Cads virtually size imaginable cut experimenter free design whatever takes make yours best setup field May 1989 47 Invisible SvitchTM direct replacement radio on/off switch Und Ye Call Der Svitch" Der Svitch" on-board magnetic on/off switch radio equipment hides inside fuselage activated outside included small bar magnet shown above cut awful holes fuselage. Isnt time made Der Svitch Ideal Any A/C Plane Boat Car Scale Proiects Water Flyera Safe use Consumes no power ation free h resistant atible radio Optional red LED lamp inatalls plane dash wing indicate radio aisle Simple Install Futaba Airtronics radios order Model 1402 simply unplug on/off switch plug Der Svitch order Model 1401 use connectors old on/oft switch instructions supplied Der Syitch includes bar magnet activator shown above ModelDescriptionPrice ea 1401Der Svitch activator no connectors twisted leads$1995 ea 14O1LEDDer Svitch activator no connectors twisted leads option leads external LED #1405$2495 1402*Der Svisch activator connectors tor Futaba Airtronics$2495 ea 1402LED*Der Svisch activator connectors Futaba Airtronics option leads external LED #1405*$2995 ea 1405LED red lamp w/24 twisted leads Models 1401 LED 1402LED$595 ea * ordering Model 1402 1 4O2LED please specify radio connector types Connectors available Futaba J Futaba G Airtronics radios order include name address specify models needed include check money order send Ragan/Barker Group 5050 Quorum Otive Suite 741 Dallas Texas 75240 Please add $2 50 per order cover UPS charges Texas residents add sales tax Credit Card orders call between g 00 500 Central Time M-F Please allow 2-4 weeks delivery _____ Patent Pending Dealer Inquiries Invited Europes leading manufacturer pilots supply fully positional figures National Scale Champs dress pilots known apparel Accessories include helmets goggles sunglasses bobble hats baseball caps floppy hats bone domes oxygen masks maewests popular types WWI WWII Sports piece suit stripes colours NATO piece suit map pockets olive green Glider pilots turtle neck sweaters floppy hat sunglasses Standard pilots tan pants simulated leather jacket fur collar baseball hat sunglasses pilots lightest ever come painted dressed ready fly 1/6 scale 2 oz $20001/4 scale 4 oz $2800 1/5 scale 3 oz $2400 1/3 scale 3200 Plus $500 postage packIng AIrmail fast delivety send phone Visa orMastercharge number AH DESIGNS 7g Pen-y-Mass Ave Rhyl Clwyd 1118 4E0 UK Tel 745-53g87 ___ B&P Associates Gives Total Flight Line FREEDOM 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: 46, 47, 157
AH merry month May flying season well under way parts country soon will main topic months column inspired car person also flies RCa 6-ft PiUs rigged smoke Joe Sullivan hails Dallas TX concerned use dual-servo redundant installations among Giant Scale birds terested specifically Joe wondered what would happen aileron failed ex treme end its travel assuming other servo functioned normally noted Joe Ive seen servo fail hard-over Joe Bridi flying Dirty Birdy club field rudder servo locked up full-right position course Joe master RC pilot able land model aircraft safely did reducing speed model point just above stalling action tended reduce right turn effect jammed rudder going maximum rate ailerons Joe able maintain wings le vel permitted model make wide sweeping right turn order line up runway landed normally situation probably serious locked-servo condition could find ourselves rudder powerful turn ing control aircraft functions right down stall thats can spin airplanes recover Its effect air speed-dependentgreater high speeds less aircraft slows down condition Joe Sullivan posedwith aileron servo locked full travelis much less critical situation other aileron servo functions properly holding full opposite failed aileron should maintain level flight touch opposite rudder should help could obtained held applying rud der aileron trims event slowing model down should help instance well hard-over failure split elevator system servo could hairy situation depending altitude attitude model occurs altitude surviving half elevator system should adequate maintain level flight attitude model relative horizon can controlled adding pullingoff engine power Coming back throttle should allow nose drop bit power nose should rise landing under conditions might bit dicey particularly engine operating 46 Model Aviation Radio Control Giant Scale John de Vries Colonel USAF Ret 4610 Moffat Ln Colorado Springs CO 80915 happens best us Phil Kents Norwegian Hawker Fury participated mid-air fly-in Phil landed safely despite damage left aileron Quarter-scale Desoutter Monoplane L Arthur Sean Liverpool England Model Club dont see flight line Idaho mountains behind Ikon NWssts new Curtiss Robin R Wingspan 1s98 fifth-scale craft model OX-5-powered ver sion prototype Emil Neely will also offer kit Curtiss Challenger-powered radial engine version same bird Dry Ridge Models Bucker Jungmelster L -scale Construction drawings will available soon Prototype biplane owned flown Art Yaden Emil Agosta has photo documentation Theres info column Giant Der Jaeger bipe R built flown Maurice Thompson Leeds England Power Kavan flat twin four-stroke idle power Itd hot fast real world servo failure extreme travel isnt common occurrence Yours truly has seen few cases failure mechanical affected control surface streamlined itself due aerodynamic pressures real problem servo failure has two dis tinct parts First RC flier has recognize condition early panic possible second has maintain cool Its another situation helps have observer stand ing fly can big help rec ommending series control movements overcome effects servo failure calm voice Failure engine servo either extreme isnt difficult cope Low engine bring bird around best landing possible maintaining models speed well above stalling point Full borecircle model un til fuel runs Out latter situation stallation servo-controlled shutoff switch Giant gas-burners could big help coping high-engine-speed servo failure Line things up shut off hummer make nor mal landing multiengined models engine-out condi tion may very difficult diagnose bird will slow down detectably may have ten dency roll severely latter usually con trolled pulling power good engine slowing model using ailerons rudder overcome rolling turning tendency Within reasonable limits speed model should maintained until landing assured ensures aerodynamic controls main tain efficiency keep bird level per mit single-engine go-around first landing approach has aborted world full-sized alrcraft speed maintained engine out defined single-engine out airspeed its usually 1520 mph above stalling speed final analysis airborne servo malfunc tion isnt something happens day does becomes true emergency de mands bunch cool part pilot smooth gentle applications corrective coun ter control pressures landing earliest possible time consistent maintenance model control Its something can prac tice consideration should thought out beforehand Redundant control sys tems Giant birds may save hash event emergency Good friend Phil Kent writes Scale col umn British RCM&E magazine has pro vided us news interesting organization Jolly Olde England Its called Large Model Association has RC interests parallel Partner Dick Phillips wrote LMA provided us fascinating booklet Its UK Large Model Aircraft Register Di rectory notes existence 568 registered Giant models LMA assigns registration number example model LM AAO 100-in-span DeHavilland Comet built flown RL Rawle Chorleywood Fasci nating youre interested getting contact British Giant Scale compadres LMAs ad dress Mrs Joan Lockwood-Goose Westerley 8 Bilton Lane Dunchurch Rugby CV22 6PT England docinnentation front both Doc Pe pino Bob Banka have recently forwarded Continued page 1S7 battery needs call write B&P Associates PO Box 22054 Waco TX 76702-2054 817662-5587 new electric starter battery pack cuts cord has always tied starter power panel Discover freedom being able start plane wherever added safety less wire get caught prop charge hefty 4 Amp/hour pack will take through weekend flying power enough spare dont stop have Ni-Cads virtually size imaginable cut experimenter free design whatever takes make yours best setup field May 1989 47 Invisible SvitchTM direct replacement radio on/off switch Und Ye Call Der Svitch" Der Svitch" on-board magnetic on/off switch radio equipment hides inside fuselage activated outside included small bar magnet shown above cut awful holes fuselage. Isnt time made Der Svitch Ideal Any A/C Plane Boat Car Scale Proiects Water Flyera Safe use Consumes no power ation free h resistant atible radio Optional red LED lamp inatalls plane dash wing indicate radio aisle Simple Install Futaba Airtronics radios order Model 1402 simply unplug on/off switch plug Der Svitch order Model 1401 use connectors old on/oft switch instructions supplied Der Syitch includes bar magnet activator shown above ModelDescriptionPrice ea 1401Der Svitch activator no connectors twisted leads$1995 ea 14O1LEDDer Svitch activator no connectors twisted leads option leads external LED #1405$2495 1402*Der Svisch activator connectors tor Futaba Airtronics$2495 ea 1402LED*Der Svisch activator connectors Futaba Airtronics option leads external LED #1405*$2995 ea 1405LED red lamp w/24 twisted leads Models 1401 LED 1402LED$595 ea * ordering Model 1402 1 4O2LED please specify radio connector types Connectors available Futaba J Futaba G Airtronics radios order include name address specify models needed include check money order send Ragan/Barker Group 5050 Quorum Otive Suite 741 Dallas Texas 75240 Please add $2 50 per order cover UPS charges Texas residents add sales tax Credit Card orders call between g 00 500 Central Time M-F Please allow 2-4 weeks delivery _____ Patent Pending Dealer Inquiries Invited Europes leading manufacturer pilots supply fully positional figures National Scale Champs dress pilots known apparel Accessories include helmets goggles sunglasses bobble hats baseball caps floppy hats bone domes oxygen masks maewests popular types WWI WWII Sports piece suit stripes colours NATO piece suit map pockets olive green Glider pilots turtle neck sweaters floppy hat sunglasses Standard pilots tan pants simulated leather jacket fur collar baseball hat sunglasses pilots lightest ever come painted dressed ready fly 1/6 scale 2 oz $20001/4 scale 4 oz $2800 1/5 scale 3 oz $2400 1/3 scale 3200 Plus $500 postage packIng AIrmail fast delivety send phone Visa orMastercharge number AH DESIGNS 7g Pen-y-Mass Ave Rhyl Clwyd 1118 4E0 UK Tel 745-53g87 ___ B&P Associates Gives Total Flight Line FREEDOM 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