r Aerobahcs EJ Wynn Paul THIS MONTH will spent old friend scoring Present precision aero batics scoring has total 650 points 20 appearance 5 starting 600 maneuvers 25 pattern points Most gripes about scoring concerned ballooning judges after flights inconsistency Re cently has concern about judges fatigue subject viewing 25 straight patterns would take about four hours certainly amounts both physical mental strain judge method give judges break would fly PAMPA category groups advanced expert etc 10-minute breaks between However basic argument about scoring point range maneuver 10 40 except landing graded 0 40 due re spects George Aldrich put together present system 1957 have always felt what have quite unwieldy system Since talking about American scoring system rest world uses FAI scoring lets look good old Yankee rithmetic schooled decimal system using quantities 010 0-100 0-1000 have operated school business money ranges rather segments number line ie 10-40 What am saying would natural award points 0-10 basis instead 10-40 range Dr Ray Cox former chairman math depart ment University Kentucky long time official UK swimming diving meets commented stunt scoring system 10-40 range seems artificial range tennis 10 15 30 40 ice skating 0-6 tenths much natural scale would 0-10 maneuvers judged basis 0-10 05 increments would give judge selection 20 possible choices familiar 0-10 range rather present 30 increments 10-40 though present scoring incre ments whole numbers Dont let half numbers scare Its relatively easy adjust far mechanical part writing down have write 8- instead 8 quick recording Continued page 87 September 1977 37 Hunt foam wing flaps Tad Fanchers original-design Spyder spans 63 in. weighs 51 oz Tigre 46 Adamisin muffler swings 12/5 RavUp Wing Monokoted Bill Fitzgerald photo Dennis Duvalls Darqette original powered ST 46 Delano custom muffler has 54-in wing Finished Hobbypoxy paint weighs 53 oz Photograph Wynn Paul Neat fitting custom-made muffler Bill Scott shown installed son Randys Stiletto Note chin-type air intake its Supertigra 46 engine Photograph Wynn Paul HIGH POWER ULTRA SONIC CLEANER As shojon less cog & radio $8830 Chassis factory assembled $76 PISTON SETTING TOOL CDX 049 engines HARDENED STEEL-ANODIZED No TRA503$325 i LABLE SOONMufflers rear exhaust MUFF-L-IT SERIES Six eight Ob reduction noise engines Proportional voiumne expansion chamber Triple reflective intermediate chamber Large exhaust nozzle iow back pressure Little no loss power Available B C engines No 301 0919 $749 No 3122940$839 No 303 45-80 $949 NEW 112A MUFFLER Fits COX 049 engines new muffler gives significant noise reduction very little power lose Back facing nozzle No 300A049$549 No 3008051$549 SCHNOERLE enqines pretty throat catching Wildcat prewar markings circling 100 feet air sun shining through its covering created Ralph Kuenz 14645 Stahelin Detroit MI 48223 CL Aerobatics/Paul continued page 37 find very difficult attempt dif ferentiate between four five numbers given maneuver present system instance good maneuver seems very difficult contrast between 30-31-3233 especially actually com paring successive sets instance side squares 10 20 fliers about 10 minutes interval between decision 10-40 spread difficult find starting point median Twentyfive median starting point except landing know lot ofjudges use starting point good ma neuver gets graded up successively bad goes down 25 However lot latitude between 25 40 pick number good very good maneuver Using 0-10 range natural action think aver age median half way mark five number comes lot naturally picking 25 10-40 range competitive diving sport Ive familiar 15 years range judging very good 10 95 90 good 85 80 75 70 satisfactory 65 60 55 50 deficiency 45 40 35 30 unsatis factory 25 20 15 1005 failed 0 range category gives judge opportunity contrast within group ie judge can vary 70 85 good dive Granted diving degree difficulty separate dive 12 30 DD multiplied judges awards diver receives higher total tough dive easier dive aspect peculiar diving although have K fac tor FAI precision aerobatics scoring Lets remember stunt judge has about 7 seconds decide award write down feel too difficult mind categorize present award range 10-40 compared other maneuvers other stunt fliers pick between 30 choices just dont think reasonable us expect mind think over such large range numbers especially unfamiliar se quence range 10-40 word error counting system No dont think can count number time dont think can truly count actual number er rors 2-5 seconds takes maneuver illustrate consider inside squares poor entrytoo high too low rounding ityou deduct point very rapid succession must check first corner check ver tical sides check second corner same time checking overall shape size check 45-degree height also see second square same place first Also shouldnt some errors weighted others short dont think judge can count fast ac curately short time think have look overall impression maneuver noting above men tioned factors general impression would appear maneuver would have very different total number errors possible would think inside squares might have 16-20 errors four-leaf clover could have up 30 pos sible errors Advocates error-counting system overlook fact certain dividuals may think can score way what looking scoring system everybody can readily adjust rather easily feel big gest disadvantages error counting maneuver should have different number errors therefore ma neuver should have different set points Besides Al Rabe quick point out year error counting September1977 87 cleaner has patented Power Pump circuit nearly doubles power over cleaners same size Required top performance 2 & 4 quart sizes No 175 21 Quart $165 No 176 46 Quart $185 8 oz Detergent$195 qt Detergent$342 Lb THE INVADER 1/12th scale metal car revolution car technology Front rear wheel suspension Uses standard parts Car designed performance Patents applied MBH1O WACO ARISTOCRAFT 18 PLAN C02 Rubber$175 Peanuts Walnuts Hazelnuts MODERNISTIC MODELS $1000 plans forfirstthree in-flight BHP PUBLICATIONS photos Modernistics Waco Aristo PO BOX 6974 ALBUQUERQUE NM 87107 craft Must powered C02 Earli Send SASE listing est postmark No strings attached used Nationals 1970 believe unanimously decried fliers mess well except winner favor adop tion straight FAI scoring has its merits would give us universal system same other coun tries However difficult system administer especially local contest level part maneuver weighed K factor stance inside squares judged sepa rately K factor first square being 5 K factor second square being 7 Getting back argument against 10-40 range feel very possible judge get groove rut would have first three maneuv ers deviate 2-3 points score Based total al lowance 30 points would keep maneuver scores within 5-10 percent other dont think maneuvers except possibly world class fliers close scoring Also times have heard contest started out high going go second round cant go up ev erybody 0-10 range feel would easier judges rate maneuvers knowing advance 90 95 10 championship-type ma neuvers least best looking particular contest 0-10 system good maneuver could judged 70 85 would difficult award higher except exceptional maneuver What am leading up proposal would make Precision Aero batics Advisory Committee next rules cycle would 1 change dividual maneuver scoring 0-10 halves 2 change appearance points 010 weight appearance equal maneuver 3 change starting points 0 2 4 change pattern points 8 making combined starting pattern points equal maneuver would give us pattern would have total points 170 tried figure way make come out 100 200 sacrificing 0-10 ma neuver scores couldnt What Props World Champs manufacturers back based some erroneous information said prop used first three placers 1976 CL Aerobatics World Cham pionships Les McDonald winning Stiletto 660 presented July issue first Former World Champs Bill Wer wage Bob Gieseke respectively second third got wind error contacted men see what prop actually used re sults McDonald 12-6 Top Flite modi fied Werwage 10-6 three-blade Tornado Gieseke 10-6W Rev Up Just goes show variety spice life prop makers produce fine products system appearance starting pattern points add up 20 117 percent total pattern com pared 76 present pattern Ap pearance would 58 percent new Half-A Retracu Another ingenious develop ment Robart AA retracts incor porate ingenious something extra expec ted firm Paramount need retractable system small air craft gear also has variable geometry 80-degree travel Focke WuIf 190 100 degrees P-39 nose gear Fea tured drag-link mechanism similar fullscale aircraft Weight 1/3 ounce per wheel Picture shows installation House Balsa Bonanza Robart Mfg Co PO Box 122 Wheaton IL 60187 product review product review product review pattern compared 307 percent present pattern traditionalists retains importance appearance points re tains points starting completing pattern within time limits radicals represents big change realists brings maneuver scoring logical familiar somewhat sim pler number series Comments arguments hate mail hopefully some backing should ad dressed to PAMPA presi dent Keith Trostle Over next several months will keep record variations above scheme suggestions other ideas will present future column info stunt PAMPA con tact Wynn Paul 1640 Maywick Dr Lexing ton KY 40504 RC Technique/Myers continued page 13 receiver will read word study drawing construction manual ask questions dont understand will obtain fine basic introduction electronics follow instructions correctly will gain practical experience aligning receiver transmitter Herein lies greatest benefit because jittery sets will encounter need nothing re-alignment restore like-new performance Vibration loosens parts causes alignment slugs move slightly age causes some com ponents change value slightly time causes receiver drift out alignment know realign set can extend useful life set maybe prevent crash two Finally something wrong persist until find fix will have gained valuable experience analyzing symptoms trouble-shooting can done free guilt fear failure because never really intend ed fly anyway psychologi cal freedom will lead perform ex periments would never dream doing official factory-built RC system Its great way learn final word advice Dont turn tuning slugs receiver too far dont turn too often made powdered iron pressed baked hold shape time move wear little off sharp edges threads Keep up youll make rounded undersized wont hold adjustment Think before move move very little Fig 3 shows alignment tool can make purpose Brass neces sary blade screwdriver cause steel other magnetic mate rial will de-tune circuit long 88 Model Aviation product review product review product review
Edition: Model Aviation - 1977/09
Page Numbers: 37, 87, 88
r Aerobahcs EJ Wynn Paul THIS MONTH will spent old friend scoring Present precision aero batics scoring has total 650 points 20 appearance 5 starting 600 maneuvers 25 pattern points Most gripes about scoring concerned ballooning judges after flights inconsistency Re cently has concern about judges fatigue subject viewing 25 straight patterns would take about four hours certainly amounts both physical mental strain judge method give judges break would fly PAMPA category groups advanced expert etc 10-minute breaks between However basic argument about scoring point range maneuver 10 40 except landing graded 0 40 due re spects George Aldrich put together present system 1957 have always felt what have quite unwieldy system Since talking about American scoring system rest world uses FAI scoring lets look good old Yankee rithmetic schooled decimal system using quantities 010 0-100 0-1000 have operated school business money ranges rather segments number line ie 10-40 What am saying would natural award points 0-10 basis instead 10-40 range Dr Ray Cox former chairman math depart ment University Kentucky long time official UK swimming diving meets commented stunt scoring system 10-40 range seems artificial range tennis 10 15 30 40 ice skating 0-6 tenths much natural scale would 0-10 maneuvers judged basis 0-10 05 increments would give judge selection 20 possible choices familiar 0-10 range rather present 30 increments 10-40 though present scoring incre ments whole numbers Dont let half numbers scare Its relatively easy adjust far mechanical part writing down have write 8- instead 8 quick recording Continued page 87 September 1977 37 Hunt foam wing flaps Tad Fanchers original-design Spyder spans 63 in. weighs 51 oz Tigre 46 Adamisin muffler swings 12/5 RavUp Wing Monokoted Bill Fitzgerald photo Dennis Duvalls Darqette original powered ST 46 Delano custom muffler has 54-in wing Finished Hobbypoxy paint weighs 53 oz Photograph Wynn Paul Neat fitting custom-made muffler Bill Scott shown installed son Randys Stiletto Note chin-type air intake its Supertigra 46 engine Photograph Wynn Paul HIGH POWER ULTRA SONIC CLEANER As shojon less cog & radio $8830 Chassis factory assembled $76 PISTON SETTING TOOL CDX 049 engines HARDENED STEEL-ANODIZED No TRA503$325 i LABLE SOONMufflers rear exhaust MUFF-L-IT SERIES Six eight Ob reduction noise engines Proportional voiumne expansion chamber Triple reflective intermediate chamber Large exhaust nozzle iow back pressure Little no loss power Available B C engines No 301 0919 $749 No 3122940$839 No 303 45-80 $949 NEW 112A MUFFLER Fits COX 049 engines new muffler gives significant noise reduction very little power lose Back facing nozzle No 300A049$549 No 3008051$549 SCHNOERLE enqines pretty throat catching Wildcat prewar markings circling 100 feet air sun shining through its covering created Ralph Kuenz 14645 Stahelin Detroit MI 48223 CL Aerobatics/Paul continued page 37 find very difficult attempt dif ferentiate between four five numbers given maneuver present system instance good maneuver seems very difficult contrast between 30-31-3233 especially actually com paring successive sets instance side squares 10 20 fliers about 10 minutes interval between decision 10-40 spread difficult find starting point median Twentyfive median starting point except landing know lot ofjudges use starting point good ma neuver gets graded up successively bad goes down 25 However lot latitude between 25 40 pick number good very good maneuver Using 0-10 range natural action think aver age median half way mark five number comes lot naturally picking 25 10-40 range competitive diving sport Ive familiar 15 years range judging very good 10 95 90 good 85 80 75 70 satisfactory 65 60 55 50 deficiency 45 40 35 30 unsatis factory 25 20 15 1005 failed 0 range category gives judge opportunity contrast within group ie judge can vary 70 85 good dive Granted diving degree difficulty separate dive 12 30 DD multiplied judges awards diver receives higher total tough dive easier dive aspect peculiar diving although have K fac tor FAI precision aerobatics scoring Lets remember stunt judge has about 7 seconds decide award write down feel too difficult mind categorize present award range 10-40 compared other maneuvers other stunt fliers pick between 30 choices just dont think reasonable us expect mind think over such large range numbers especially unfamiliar se quence range 10-40 word error counting system No dont think can count number time dont think can truly count actual number er rors 2-5 seconds takes maneuver illustrate consider inside squares poor entrytoo high too low rounding ityou deduct point very rapid succession must check first corner check ver tical sides check second corner same time checking overall shape size check 45-degree height also see second square same place first Also shouldnt some errors weighted others short dont think judge can count fast ac curately short time think have look overall impression maneuver noting above men tioned factors general impression would appear maneuver would have very different total number errors possible would think inside squares might have 16-20 errors four-leaf clover could have up 30 pos sible errors Advocates error-counting system overlook fact certain dividuals may think can score way what looking scoring system everybody can readily adjust rather easily feel big gest disadvantages error counting maneuver should have different number errors therefore ma neuver should have different set points Besides Al Rabe quick point out year error counting September1977 87 cleaner has patented Power Pump circuit nearly doubles power over cleaners same size Required top performance 2 & 4 quart sizes No 175 21 Quart $165 No 176 46 Quart $185 8 oz Detergent$195 qt Detergent$342 Lb THE INVADER 1/12th scale metal car revolution car technology Front rear wheel suspension Uses standard parts Car designed performance Patents applied MBH1O WACO ARISTOCRAFT 18 PLAN C02 Rubber$175 Peanuts Walnuts Hazelnuts MODERNISTIC MODELS $1000 plans forfirstthree in-flight BHP PUBLICATIONS photos Modernistics Waco Aristo PO BOX 6974 ALBUQUERQUE NM 87107 craft Must powered C02 Earli Send SASE listing est postmark No strings attached used Nationals 1970 believe unanimously decried fliers mess well except winner favor adop tion straight FAI scoring has its merits would give us universal system same other coun tries However difficult system administer especially local contest level part maneuver weighed K factor stance inside squares judged sepa rately K factor first square being 5 K factor second square being 7 Getting back argument against 10-40 range feel very possible judge get groove rut would have first three maneuv ers deviate 2-3 points score Based total al lowance 30 points would keep maneuver scores within 5-10 percent other dont think maneuvers except possibly world class fliers close scoring Also times have heard contest started out high going go second round cant go up ev erybody 0-10 range feel would easier judges rate maneuvers knowing advance 90 95 10 championship-type ma neuvers least best looking particular contest 0-10 system good maneuver could judged 70 85 would difficult award higher except exceptional maneuver What am leading up proposal would make Precision Aero batics Advisory Committee next rules cycle would 1 change dividual maneuver scoring 0-10 halves 2 change appearance points 010 weight appearance equal maneuver 3 change starting points 0 2 4 change pattern points 8 making combined starting pattern points equal maneuver would give us pattern would have total points 170 tried figure way make come out 100 200 sacrificing 0-10 ma neuver scores couldnt What Props World Champs manufacturers back based some erroneous information said prop used first three placers 1976 CL Aerobatics World Cham pionships Les McDonald winning Stiletto 660 presented July issue first Former World Champs Bill Wer wage Bob Gieseke respectively second third got wind error contacted men see what prop actually used re sults McDonald 12-6 Top Flite modi fied Werwage 10-6 three-blade Tornado Gieseke 10-6W Rev Up Just goes show variety spice life prop makers produce fine products system appearance starting pattern points add up 20 117 percent total pattern com pared 76 present pattern Ap pearance would 58 percent new Half-A Retracu Another ingenious develop ment Robart AA retracts incor porate ingenious something extra expec ted firm Paramount need retractable system small air craft gear also has variable geometry 80-degree travel Focke WuIf 190 100 degrees P-39 nose gear Fea tured drag-link mechanism similar fullscale aircraft Weight 1/3 ounce per wheel Picture shows installation House Balsa Bonanza Robart Mfg Co PO Box 122 Wheaton IL 60187 product review product review product review pattern compared 307 percent present pattern traditionalists retains importance appearance points re tains points starting completing pattern within time limits radicals represents big change realists brings maneuver scoring logical familiar somewhat sim pler number series Comments arguments hate mail hopefully some backing should ad dressed to PAMPA presi dent Keith Trostle Over next several months will keep record variations above scheme suggestions other ideas will present future column info stunt PAMPA con tact Wynn Paul 1640 Maywick Dr Lexing ton KY 40504 RC Technique/Myers continued page 13 receiver will read word study drawing construction manual ask questions dont understand will obtain fine basic introduction electronics follow instructions correctly will gain practical experience aligning receiver transmitter Herein lies greatest benefit because jittery sets will encounter need nothing re-alignment restore like-new performance Vibration loosens parts causes alignment slugs move slightly age causes some com ponents change value slightly time causes receiver drift out alignment know realign set can extend useful life set maybe prevent crash two Finally something wrong persist until find fix will have gained valuable experience analyzing symptoms trouble-shooting can done free guilt fear failure because never really intend ed fly anyway psychologi cal freedom will lead perform ex periments would never dream doing official factory-built RC system Its great way learn final word advice Dont turn tuning slugs receiver too far dont turn too often made powdered iron pressed baked hold shape time move wear little off sharp edges threads Keep up youll make rounded undersized wont hold adjustment Think before move move very little Fig 3 shows alignment tool can make purpose Brass neces sary blade screwdriver cause steel other magnetic mate rial will de-tune circuit long 88 Model Aviation product review product review product review
Edition: Model Aviation - 1977/09
Page Numbers: 37, 87, 88
r Aerobahcs EJ Wynn Paul THIS MONTH will spent old friend scoring Present precision aero batics scoring has total 650 points 20 appearance 5 starting 600 maneuvers 25 pattern points Most gripes about scoring concerned ballooning judges after flights inconsistency Re cently has concern about judges fatigue subject viewing 25 straight patterns would take about four hours certainly amounts both physical mental strain judge method give judges break would fly PAMPA category groups advanced expert etc 10-minute breaks between However basic argument about scoring point range maneuver 10 40 except landing graded 0 40 due re spects George Aldrich put together present system 1957 have always felt what have quite unwieldy system Since talking about American scoring system rest world uses FAI scoring lets look good old Yankee rithmetic schooled decimal system using quantities 010 0-100 0-1000 have operated school business money ranges rather segments number line ie 10-40 What am saying would natural award points 0-10 basis instead 10-40 range Dr Ray Cox former chairman math depart ment University Kentucky long time official UK swimming diving meets commented stunt scoring system 10-40 range seems artificial range tennis 10 15 30 40 ice skating 0-6 tenths much natural scale would 0-10 maneuvers judged basis 0-10 05 increments would give judge selection 20 possible choices familiar 0-10 range rather present 30 increments 10-40 though present scoring incre ments whole numbers Dont let half numbers scare Its relatively easy adjust far mechanical part writing down have write 8- instead 8 quick recording Continued page 87 September 1977 37 Hunt foam wing flaps Tad Fanchers original-design Spyder spans 63 in. weighs 51 oz Tigre 46 Adamisin muffler swings 12/5 RavUp Wing Monokoted Bill Fitzgerald photo Dennis Duvalls Darqette original powered ST 46 Delano custom muffler has 54-in wing Finished Hobbypoxy paint weighs 53 oz Photograph Wynn Paul Neat fitting custom-made muffler Bill Scott shown installed son Randys Stiletto Note chin-type air intake its Supertigra 46 engine Photograph Wynn Paul HIGH POWER ULTRA SONIC CLEANER As shojon less cog & radio $8830 Chassis factory assembled $76 PISTON SETTING TOOL CDX 049 engines HARDENED STEEL-ANODIZED No TRA503$325 i LABLE SOONMufflers rear exhaust MUFF-L-IT SERIES Six eight Ob reduction noise engines Proportional voiumne expansion chamber Triple reflective intermediate chamber Large exhaust nozzle iow back pressure Little no loss power Available B C engines No 301 0919 $749 No 3122940$839 No 303 45-80 $949 NEW 112A MUFFLER Fits COX 049 engines new muffler gives significant noise reduction very little power lose Back facing nozzle No 300A049$549 No 3008051$549 SCHNOERLE enqines pretty throat catching Wildcat prewar markings circling 100 feet air sun shining through its covering created Ralph Kuenz 14645 Stahelin Detroit MI 48223 CL Aerobatics/Paul continued page 37 find very difficult attempt dif ferentiate between four five numbers given maneuver present system instance good maneuver seems very difficult contrast between 30-31-3233 especially actually com paring successive sets instance side squares 10 20 fliers about 10 minutes interval between decision 10-40 spread difficult find starting point median Twentyfive median starting point except landing know lot ofjudges use starting point good ma neuver gets graded up successively bad goes down 25 However lot latitude between 25 40 pick number good very good maneuver Using 0-10 range natural action think aver age median half way mark five number comes lot naturally picking 25 10-40 range competitive diving sport Ive familiar 15 years range judging very good 10 95 90 good 85 80 75 70 satisfactory 65 60 55 50 deficiency 45 40 35 30 unsatis factory 25 20 15 1005 failed 0 range category gives judge opportunity contrast within group ie judge can vary 70 85 good dive Granted diving degree difficulty separate dive 12 30 DD multiplied judges awards diver receives higher total tough dive easier dive aspect peculiar diving although have K fac tor FAI precision aerobatics scoring Lets remember stunt judge has about 7 seconds decide award write down feel too difficult mind categorize present award range 10-40 compared other maneuvers other stunt fliers pick between 30 choices just dont think reasonable us expect mind think over such large range numbers especially unfamiliar se quence range 10-40 word error counting system No dont think can count number time dont think can truly count actual number er rors 2-5 seconds takes maneuver illustrate consider inside squares poor entrytoo high too low rounding ityou deduct point very rapid succession must check first corner check ver tical sides check second corner same time checking overall shape size check 45-degree height also see second square same place first Also shouldnt some errors weighted others short dont think judge can count fast ac curately short time think have look overall impression maneuver noting above men tioned factors general impression would appear maneuver would have very different total number errors possible would think inside squares might have 16-20 errors four-leaf clover could have up 30 pos sible errors Advocates error-counting system overlook fact certain dividuals may think can score way what looking scoring system everybody can readily adjust rather easily feel big gest disadvantages error counting maneuver should have different number errors therefore ma neuver should have different set points Besides Al Rabe quick point out year error counting September1977 87 cleaner has patented Power Pump circuit nearly doubles power over cleaners same size Required top performance 2 & 4 quart sizes No 175 21 Quart $165 No 176 46 Quart $185 8 oz Detergent$195 qt Detergent$342 Lb THE INVADER 1/12th scale metal car revolution car technology Front rear wheel suspension Uses standard parts Car designed performance Patents applied MBH1O WACO ARISTOCRAFT 18 PLAN C02 Rubber$175 Peanuts Walnuts Hazelnuts MODERNISTIC MODELS $1000 plans forfirstthree in-flight BHP PUBLICATIONS photos Modernistics Waco Aristo PO BOX 6974 ALBUQUERQUE NM 87107 craft Must powered C02 Earli Send SASE listing est postmark No strings attached used Nationals 1970 believe unanimously decried fliers mess well except winner favor adop tion straight FAI scoring has its merits would give us universal system same other coun tries However difficult system administer especially local contest level part maneuver weighed K factor stance inside squares judged sepa rately K factor first square being 5 K factor second square being 7 Getting back argument against 10-40 range feel very possible judge get groove rut would have first three maneuv ers deviate 2-3 points score Based total al lowance 30 points would keep maneuver scores within 5-10 percent other dont think maneuvers except possibly world class fliers close scoring Also times have heard contest started out high going go second round cant go up ev erybody 0-10 range feel would easier judges rate maneuvers knowing advance 90 95 10 championship-type ma neuvers least best looking particular contest 0-10 system good maneuver could judged 70 85 would difficult award higher except exceptional maneuver What am leading up proposal would make Precision Aero batics Advisory Committee next rules cycle would 1 change dividual maneuver scoring 0-10 halves 2 change appearance points 010 weight appearance equal maneuver 3 change starting points 0 2 4 change pattern points 8 making combined starting pattern points equal maneuver would give us pattern would have total points 170 tried figure way make come out 100 200 sacrificing 0-10 ma neuver scores couldnt What Props World Champs manufacturers back based some erroneous information said prop used first three placers 1976 CL Aerobatics World Cham pionships Les McDonald winning Stiletto 660 presented July issue first Former World Champs Bill Wer wage Bob Gieseke respectively second third got wind error contacted men see what prop actually used re sults McDonald 12-6 Top Flite modi fied Werwage 10-6 three-blade Tornado Gieseke 10-6W Rev Up Just goes show variety spice life prop makers produce fine products system appearance starting pattern points add up 20 117 percent total pattern com pared 76 present pattern Ap pearance would 58 percent new Half-A Retracu Another ingenious develop ment Robart AA retracts incor porate ingenious something extra expec ted firm Paramount need retractable system small air craft gear also has variable geometry 80-degree travel Focke WuIf 190 100 degrees P-39 nose gear Fea tured drag-link mechanism similar fullscale aircraft Weight 1/3 ounce per wheel Picture shows installation House Balsa Bonanza Robart Mfg Co PO Box 122 Wheaton IL 60187 product review product review product review pattern compared 307 percent present pattern traditionalists retains importance appearance points re tains points starting completing pattern within time limits radicals represents big change realists brings maneuver scoring logical familiar somewhat sim pler number series Comments arguments hate mail hopefully some backing should ad dressed to PAMPA presi dent Keith Trostle Over next several months will keep record variations above scheme suggestions other ideas will present future column info stunt PAMPA con tact Wynn Paul 1640 Maywick Dr Lexing ton KY 40504 RC Technique/Myers continued page 13 receiver will read word study drawing construction manual ask questions dont understand will obtain fine basic introduction electronics follow instructions correctly will gain practical experience aligning receiver transmitter Herein lies greatest benefit because jittery sets will encounter need nothing re-alignment restore like-new performance Vibration loosens parts causes alignment slugs move slightly age causes some com ponents change value slightly time causes receiver drift out alignment know realign set can extend useful life set maybe prevent crash two Finally something wrong persist until find fix will have gained valuable experience analyzing symptoms trouble-shooting can done free guilt fear failure because never really intend ed fly anyway psychologi cal freedom will lead perform ex periments would never dream doing official factory-built RC system Its great way learn final word advice Dont turn tuning slugs receiver too far dont turn too often made powdered iron pressed baked hold shape time move wear little off sharp edges threads Keep up youll make rounded undersized wont hold adjustment Think before move move very little Fig 3 shows alignment tool can make purpose Brass neces sary blade screwdriver cause steel other magnetic mate rial will de-tune circuit long 88 Model Aviation product review product review product review