CONTROL LINE NAVY CARRIER NATIONALS CARRIER As write havent chance read Joe Justs description 1993 Nationals Navy Carrier activities having talked him others attended Nationals certainly sounded like super year Youve already seen close scores separated contestants Quite few modelers achieved personal best scores Pete Mazur set new record Class last column promised look equipment used last Nationals High speeds up last year classes whole better last four years Bill Melton Pete Mazur topped 90 mph Profile Four Class models went 100 mph Bill Melton achieved 1071 using Superligre X 40 followed Joe Dzialo Peter Mazur Brian Silversmith 102s Class II John Castiglioni Bill Melton Pete Mazur topped 105 mph Overall top speed contest went John Castiglionis Rossi 65-powered Grumman F4F-3 Wildcat Rev-up 11 x 8 prop pulled 210-square-inch model 1129 mph Profile Carrier Bill Bischoff managed overall best time year using Wiley 36 engine APC prop Bill Meltons first appearance Nelson 36 1 mph slower infonnation Wiley engine appears later column Melton used 0S carburetor Rev-Up 9 x 7 prop also top 90 mph both models likely better accumulate some time Watch out next year Slow speeds best Nationals quite some time Three Class Ils six Class topped three minutes Five Profiles over four minutes winner Bill Melton over five minutes 3095 seconds As past larger aircraft lighter wing loadings dominated slow-flight performance Scale classes exception Joe Dzialos Class II Bearcat tipped scales three pounds 10 ounces yet still did better three minutes slow flight MO- ls still predominant aircraft accounted almost half Profiles year first time Credit probably goes Bill Bischoff other modelers Texas have developing Profile MO-ls past few years Theyve encouraging other CL modelers try Carrier produced kits MO- 1 almost Guardians six MO-ls eight P-51 Mustang Grumman Bearcat Consolidated TBY-1 Sea Wolf rounded out pack larger MO-ls took top places Classes land II accounted half fewer top six places event top speeds both Scale classes went smaller models though over 200 square inches wing area placing smaller models MO-Is indicates still plenty opportunity such models event Since Nationals Ive received number calls modelers looking ideas models other MO- 1 should some new model types flight line next year As past large engines dominated Class II taking five top seven places scoring five fastest speeds OS 65 DF Rossi preferred engines three OS 46s also class Pete Mazurs winning Webra Speed 61 K&B 66 completed field Class K&B engine choice K&B people shouldnt running bank however K&Bs used out production winning K&B 40S almost qualifies antique Pete Mazur sure knows keep running OS Picco SuperTigre engines powered rest class propeller department Rev-Up relinquished its top spot APC Landing Products year Part increase probably due increased number modelers running left-hand-rotation engines APC has good variety pusher props engines best top speeds Class II recorded Rev-Up props APC fastest Profile glowplug choice remains Fox RC plugby two second popular plug K&B iL research done Bill Bischoff seemed confirmed results Bill found K&B IL allowed higher engine speeds Fox RC engines classes Fox outnumbered among highest speeds recorded no trick control systems year contestants provided information listed derivatives J Robert Smurthwaite s original Flight Control three-line control system 108 Model Aviation Blschoffs Profile MO-i uses foam Bill Bischoff used Willy Wileys LH- Roland Baltes Class II Nostalgia Carrier wing speed construction Column has crankshaft 36 AAC engine fastest high Curtiss SB2C Helldiver rolls down details availability foam cores speed Profile Nationals deck USS North Island Roland Baltes Chance Vought F8U Corsair makes low pass model painted post-WW II US Navy training colors Throttle systems very straightforward Profile Carrier usual Scale classes variety systems using crankcase pressure dominated Most used combination metering commercial carburetor combination variable exhaust restrictor John Castiglioni again showed off machining skills original throttle systems engines flown Joe Dzialo least pump-equipped engineBill Bischoffs Class entry Because used 05 4D carburetor rather 4E carb larger bore suspect pump used consistency engine run increased power Bills Class II entry 0S 46SF also used 4D carb suction difference models fuel tank placement Class II model tank wing its lateral placement could produce consistent fuel head side-mounted engine models flew almost identical high low speeds Foam Wings MO-i Phil Cartiers CoreHouse760 Waltonville Road Hummelstown PA 17036 Tel 717 566-3810is offering foam wings MO-i patterned after used Bill Bischoff others Texas Profile Class I/il MO-ls three-section wings 44 inches span scale outline produce total wing area 360 square inches required cut center section proper span fuselage being used glue panels together add ars shape tips cover Contact Phil exact prices obtain information other offerings catalog $1 Combat wings make good starting points 15 Carrier models Wiley 36 Engine new engine appeared Profile Carrier circle 1993 Nationals 36 AAC design produced Willy Wiley saw prototype revisited George Aldrich last May Quality excellent performance also quite good very light engine nine ounces carburetor weighing slightly less Fox Combat Special about same old ST 35 Bill Bischoff used achieve fastest time Profile Carrier 0S 4D carburetor installed November being written production engine hold An agreement produce engine Fox did materialize Willy within weeks starting production again newly outfitted machine shop time read this very promising engine will again production Wiley 36 AAC acheives its lightness careful selection materials cutting out metal needed strength engine originally designed Combat Continued page 124 eee T r iriTititi April 1994 109 YES THE TWiN-AIR 20 IS HERE AT LAST YES THE iWN-AIR 20 REALLY CAN BE CONTROLLED ON JUST ONE ENGINE YES THE TWiN-AIR 20 OFFERS THE SAME HIGH QUALITY PERFOR MANCE EASE OF FLYING AND HANDLING AEROBATiC CAPABILI TIES FUN TO BUILD AND FUN TO FLY FEATURES FOUND IN ALL NORTHEAST AERODYNAMIC KITS THE TRAIN-AIRS BEL-AIRS AND SPORT AIR YES ITS FROM . NORTHEAST AERODYNAMICS INC 4 NORTHEA ST AERODYNAMICS INCM 150 ROBINSON ROAD ON NH 03051 881-5899 Specifications Engine Requirement -Two 20-30 Wing Span 58 Wing Area 625 Sq 434 Sq Fuselage Length -43 Fuselage Width 35 Overall Weight Range 55 65 pounds Wing Loading Range 195 239 Sq Ft Radio Functions -4 Channel Great Selection D 55721423 16&60z EDEDED Super Prices U 14 oz 38w Plain ave 25yds mm $150/yd 3 16 oz 50w Satin Weave 25 yds mm $4OOIyd Minimum order 1 yd VISA-MASTERCARD FAST SERVICE ORDER TOLL-FREE 800-338-1278 Dealer & Mfg inquiries welcome Send $3 postage & handling FREE catalog rII U U Important note fiddling piston shims possible run piston up high enough bore crash piston glowbead Take conservative approach adding 005 head shim 004 piston shim always double-check interference between piston head before starting engine attempting squeeze mix really tightly may find measured clearance being negative piston does actually hit glowbead close look Cox glowhead chamber will explain advised flirting disaster especially switching back forth between Cox 1702 GloBee GB-SR using 40% higher nitro fuel probably using too much compression anyway typical VA 049 comes factory set up way Russians like run engines Lots revs quite small props specific engine has approximately 1600 exhaust timing negative clearance head shims installed 004 between glowbead glowbead seat setup okay run-in Grish S x 3 prop cut 4 diameter although may want install total two three head shims order extend life glowhead during run-in CL Combat guys may want run two just piston shim conjunction 40% 50% nitro fuel very small diameter prop FF RC applications larger diameter props effective will require less timing/increased torque piston shims increased torque setup total three piston shims being suggested starting point Beginning stock run-in engine simply remove piston carrier hooking big end rod crankpin unscrewing piston Finger pressure remember piston free carrier add two piston shims being certain seated properly before reinstalling piston camer late June early July year premier Combat event takes place Seattle area Washington Bladder Grabber features triple-elimination AMA Fast Combat format coupled stereo prizes total $12000 worth Carver equipment Bladder Grabber 18 1993 top pilot Allen Deveuve San Diego California photographs accompany column show Allen getting traditional handshake Howard Rush congratulatory dousing ice water ever-mischievous Phil Granderson Its good contest win Plan trip Pacific Northwest 1994 avy Carrier/Perry Continued paqe 109 competition plenty strong enough environment Profile Carrier engine intake sized fit OS 4-series carburetor 135mm 532 inches carburetor included Standard configuration left-hand-rotation crankshaft use pusher props Bill Bischoffs 904 mph high speed Nationals achieved PAC 9 x 6P prop 40% nitro fuel Static rpm combination 17000 Timing follows 1600 exhaust l26 transfer boost open together intake open 400 ABDC close 550 ATDC Willy experimenting extending intake closing Right now 650 ATDC seems practical limit Carrier engine speeds Combat crankshaft could subsituted produce engine conventional right-hand rotation however timing different Combat engine designed 21500rpm 8 x 6 prop closes 720 ATDC may affect idle could present blowback problems lower Carrier engine speeds Youre own engine costs $175 bad considering dont have work top performance Custom lefthand cranks available engine $100 K&B 58 left-hand cranks available $50 Contact Willy Wileys Custom Motors 15605 Wright Brothers Addison TX 75244 Tel 214 245-6548 Autogiros still looking information Autogiros Carrier Focus Competition section can stop straining eyes hasnt appeared probably wont Since no real basis including autogiros within existing rules Bill Bischoff CLCB chairman has elected allow issue resolved rules cycle began January 1994 has published survey High-Low-Landing newsletter Navy Carrier Society NCS havent filled yours out yet dig out send results will used assist Navy Carrier Advisory Committee CLCB determining vote proposals will submitted arent member NCS theres still time join get survey sending $6 Mike Pugh HCR 51 Box 220 Stephenville TX 76401 have already seen draft proposal Bill Darkow would allow types rotary-wing aircraft modeled three classes Carrier Bill builder original Kayaba Ka- 1 model generated protest described October column Ill best keep informed issues develop sure read Focus Competition latest information Calculator Scoring Program portable computers becoming commonplace use contest management logical step AMA has used computers purpose Nationals will expanding use future least two PC-compatible programs scoring CL Navy Carrier plan publish before 1994 flying season will later column months offering much less expensive less complex solution automated score computation Radio Shack sells programmable 46function scientific calculator designation EC-4021 catalog number 65-984 has limited 40-step program memory can accommodate main program time no subprograms has three memory registers limited memory functions has basic arithmetic statistical trigonometric functions cannot truncate round numbers within memory capable logical switching After reading limitations may wondering mentioned mentioned because few redeeming characteristicsit readily available Radio Shack costs $1795 program memory though limited large enough store reasonably capable scoring program Navy Carrier also retains program turned off wrote program follows take advantage full program memory provide high degree accuracy flexibility program self-contained no additional calculations such averaging two watch readings required outside program no need remember constants calculator settings nothing must entered before program can run has enter times high speed record high-speed score scoresheet enter low-speed times record low-speed score enter landing bonus points write down total score problem program occasionally makes error final score Although problem sounds like fatal flaw bad sounds error never iho point occurs 25% timeThe displayed values high low total scores rounded nearest i/10 point required rules Because calculator cannot round numbers uses calculations cannot add displayed values get final score can add unrounded intermediate scores round final total occasional error easily detected comparing last digits high low-speed scores final score last digits high low scores 124 Model Aviation up final digit total score just correct total score plus minus 1 comparing last digits person could probably score Carrier contest United States next ten years never have error effect outcome See program graphics page Notice have purposefully selected times result error described previously checking last digits high low scores 4 0 adding can see last digit final score should 4 start new computation after recording final score simply press COMP key again reset program finishing score computation simply turn off calculator turn again press COMP key usual program requires operator input two watch readings both high low speed computations watch reliable enter single time twice no low speed score stop after computing high speed score finish scoring manually really want finish scoring using program must enter very small number low-speed time such 001 wrote program allow low-speed time zero causing calculator divide zeroan operation causes problems calculator Unfortunately calculator wont cooperate computing zero low-speed score will multiply constant Ki zero zero manually entered However will accept computed value zero same operation finds computed zero will substitute final score will error about half point owing program listing along comments explain program allow adapted other programmable calculators OPERATION 2ndF LRN 17993 2ndF l/x 2ndF x -4 Ki 2ndF TAB 1 2ndF HALT [x] 2 Ki 2ndF lIx MS 2ndF HALT [x] 2 Kl x MR x 10 2ndF HALT 2ndF HALT MR 2ndF LRN COMMENT Starts program record Constant used compute speed Inverse speed constant Store constant later use Round display decimal Temporarily stop program receive 1st high time Add Receive new input 2nd high time Complete calculation Divide Complete calcutation average watch readings Multiply constant Inverse product Store result memory Temporarily stop program display high speed mph receive 1st low time Add Receive new input 2nd low time Complete calculation Divide Complete calculation average watch readings Multiply constant Multiply Recall value memory Multiply Complete calculation Add low-speed score memory Temporarily stop program display low-speed score receive landing points Add landing points memory Temporarily stop program receive bonus points Add bonus points memory Recall value memory display now final score Ends program record April 1994 125 ensure program entered properly check program prior using enter values outcome known suggest following PRESSENTER COMP18 COMP182 COMP200 COMP202 COMP100 COMP10 COMP following summary describes program operation listing key press COMP key starts program continues program after temporary halt showing what will display program next stops indicating value enter calculator PRESSENTER COMPHigh Speed Time 1 COMPHigh Speed Time 2 COMPLow Speed Time 1 COMPLow Speed Time 2 COMPLanding Score COMPBonus Points COMP
Edition: Model Aviation - 1994/04
Page Numbers: 108, 109, 124, 125
CONTROL LINE NAVY CARRIER NATIONALS CARRIER As write havent chance read Joe Justs description 1993 Nationals Navy Carrier activities having talked him others attended Nationals certainly sounded like super year Youve already seen close scores separated contestants Quite few modelers achieved personal best scores Pete Mazur set new record Class last column promised look equipment used last Nationals High speeds up last year classes whole better last four years Bill Melton Pete Mazur topped 90 mph Profile Four Class models went 100 mph Bill Melton achieved 1071 using Superligre X 40 followed Joe Dzialo Peter Mazur Brian Silversmith 102s Class II John Castiglioni Bill Melton Pete Mazur topped 105 mph Overall top speed contest went John Castiglionis Rossi 65-powered Grumman F4F-3 Wildcat Rev-up 11 x 8 prop pulled 210-square-inch model 1129 mph Profile Carrier Bill Bischoff managed overall best time year using Wiley 36 engine APC prop Bill Meltons first appearance Nelson 36 1 mph slower infonnation Wiley engine appears later column Melton used 0S carburetor Rev-Up 9 x 7 prop also top 90 mph both models likely better accumulate some time Watch out next year Slow speeds best Nationals quite some time Three Class Ils six Class topped three minutes Five Profiles over four minutes winner Bill Melton over five minutes 3095 seconds As past larger aircraft lighter wing loadings dominated slow-flight performance Scale classes exception Joe Dzialos Class II Bearcat tipped scales three pounds 10 ounces yet still did better three minutes slow flight MO- ls still predominant aircraft accounted almost half Profiles year first time Credit probably goes Bill Bischoff other modelers Texas have developing Profile MO-ls past few years Theyve encouraging other CL modelers try Carrier produced kits MO- 1 almost Guardians six MO-ls eight P-51 Mustang Grumman Bearcat Consolidated TBY-1 Sea Wolf rounded out pack larger MO-ls took top places Classes land II accounted half fewer top six places event top speeds both Scale classes went smaller models though over 200 square inches wing area placing smaller models MO-Is indicates still plenty opportunity such models event Since Nationals Ive received number calls modelers looking ideas models other MO- 1 should some new model types flight line next year As past large engines dominated Class II taking five top seven places scoring five fastest speeds OS 65 DF Rossi preferred engines three OS 46s also class Pete Mazurs winning Webra Speed 61 K&B 66 completed field Class K&B engine choice K&B people shouldnt running bank however K&Bs used out production winning K&B 40S almost qualifies antique Pete Mazur sure knows keep running OS Picco SuperTigre engines powered rest class propeller department Rev-Up relinquished its top spot APC Landing Products year Part increase probably due increased number modelers running left-hand-rotation engines APC has good variety pusher props engines best top speeds Class II recorded Rev-Up props APC fastest Profile glowplug choice remains Fox RC plugby two second popular plug K&B iL research done Bill Bischoff seemed confirmed results Bill found K&B IL allowed higher engine speeds Fox RC engines classes Fox outnumbered among highest speeds recorded no trick control systems year contestants provided information listed derivatives J Robert Smurthwaite s original Flight Control three-line control system 108 Model Aviation Blschoffs Profile MO-i uses foam Bill Bischoff used Willy Wileys LH- Roland Baltes Class II Nostalgia Carrier wing speed construction Column has crankshaft 36 AAC engine fastest high Curtiss SB2C Helldiver rolls down details availability foam cores speed Profile Nationals deck USS North Island Roland Baltes Chance Vought F8U Corsair makes low pass model painted post-WW II US Navy training colors Throttle systems very straightforward Profile Carrier usual Scale classes variety systems using crankcase pressure dominated Most used combination metering commercial carburetor combination variable exhaust restrictor John Castiglioni again showed off machining skills original throttle systems engines flown Joe Dzialo least pump-equipped engineBill Bischoffs Class entry Because used 05 4D carburetor rather 4E carb larger bore suspect pump used consistency engine run increased power Bills Class II entry 0S 46SF also used 4D carb suction difference models fuel tank placement Class II model tank wing its lateral placement could produce consistent fuel head side-mounted engine models flew almost identical high low speeds Foam Wings MO-i Phil Cartiers CoreHouse760 Waltonville Road Hummelstown PA 17036 Tel 717 566-3810is offering foam wings MO-i patterned after used Bill Bischoff others Texas Profile Class I/il MO-ls three-section wings 44 inches span scale outline produce total wing area 360 square inches required cut center section proper span fuselage being used glue panels together add ars shape tips cover Contact Phil exact prices obtain information other offerings catalog $1 Combat wings make good starting points 15 Carrier models Wiley 36 Engine new engine appeared Profile Carrier circle 1993 Nationals 36 AAC design produced Willy Wiley saw prototype revisited George Aldrich last May Quality excellent performance also quite good very light engine nine ounces carburetor weighing slightly less Fox Combat Special about same old ST 35 Bill Bischoff used achieve fastest time Profile Carrier 0S 4D carburetor installed November being written production engine hold An agreement produce engine Fox did materialize Willy within weeks starting production again newly outfitted machine shop time read this very promising engine will again production Wiley 36 AAC acheives its lightness careful selection materials cutting out metal needed strength engine originally designed Combat Continued page 124 eee T r iriTititi April 1994 109 YES THE TWiN-AIR 20 IS HERE AT LAST YES THE iWN-AIR 20 REALLY CAN BE CONTROLLED ON JUST ONE ENGINE YES THE TWiN-AIR 20 OFFERS THE SAME HIGH QUALITY PERFOR MANCE EASE OF FLYING AND HANDLING AEROBATiC CAPABILI TIES FUN TO BUILD AND FUN TO FLY FEATURES FOUND IN ALL NORTHEAST AERODYNAMIC KITS THE TRAIN-AIRS BEL-AIRS AND SPORT AIR YES ITS FROM . NORTHEAST AERODYNAMICS INC 4 NORTHEA ST AERODYNAMICS INCM 150 ROBINSON ROAD ON NH 03051 881-5899 Specifications Engine Requirement -Two 20-30 Wing Span 58 Wing Area 625 Sq 434 Sq Fuselage Length -43 Fuselage Width 35 Overall Weight Range 55 65 pounds Wing Loading Range 195 239 Sq Ft Radio Functions -4 Channel Great Selection D 55721423 16&60z EDEDED Super Prices U 14 oz 38w Plain ave 25yds mm $150/yd 3 16 oz 50w Satin Weave 25 yds mm $4OOIyd Minimum order 1 yd VISA-MASTERCARD FAST SERVICE ORDER TOLL-FREE 800-338-1278 Dealer & Mfg inquiries welcome Send $3 postage & handling FREE catalog rII U U Important note fiddling piston shims possible run piston up high enough bore crash piston glowbead Take conservative approach adding 005 head shim 004 piston shim always double-check interference between piston head before starting engine attempting squeeze mix really tightly may find measured clearance being negative piston does actually hit glowbead close look Cox glowhead chamber will explain advised flirting disaster especially switching back forth between Cox 1702 GloBee GB-SR using 40% higher nitro fuel probably using too much compression anyway typical VA 049 comes factory set up way Russians like run engines Lots revs quite small props specific engine has approximately 1600 exhaust timing negative clearance head shims installed 004 between glowbead glowbead seat setup okay run-in Grish S x 3 prop cut 4 diameter although may want install total two three head shims order extend life glowhead during run-in CL Combat guys may want run two just piston shim conjunction 40% 50% nitro fuel very small diameter prop FF RC applications larger diameter props effective will require less timing/increased torque piston shims increased torque setup total three piston shims being suggested starting point Beginning stock run-in engine simply remove piston carrier hooking big end rod crankpin unscrewing piston Finger pressure remember piston free carrier add two piston shims being certain seated properly before reinstalling piston camer late June early July year premier Combat event takes place Seattle area Washington Bladder Grabber features triple-elimination AMA Fast Combat format coupled stereo prizes total $12000 worth Carver equipment Bladder Grabber 18 1993 top pilot Allen Deveuve San Diego California photographs accompany column show Allen getting traditional handshake Howard Rush congratulatory dousing ice water ever-mischievous Phil Granderson Its good contest win Plan trip Pacific Northwest 1994 avy Carrier/Perry Continued paqe 109 competition plenty strong enough environment Profile Carrier engine intake sized fit OS 4-series carburetor 135mm 532 inches carburetor included Standard configuration left-hand-rotation crankshaft use pusher props Bill Bischoffs 904 mph high speed Nationals achieved PAC 9 x 6P prop 40% nitro fuel Static rpm combination 17000 Timing follows 1600 exhaust l26 transfer boost open together intake open 400 ABDC close 550 ATDC Willy experimenting extending intake closing Right now 650 ATDC seems practical limit Carrier engine speeds Combat crankshaft could subsituted produce engine conventional right-hand rotation however timing different Combat engine designed 21500rpm 8 x 6 prop closes 720 ATDC may affect idle could present blowback problems lower Carrier engine speeds Youre own engine costs $175 bad considering dont have work top performance Custom lefthand cranks available engine $100 K&B 58 left-hand cranks available $50 Contact Willy Wileys Custom Motors 15605 Wright Brothers Addison TX 75244 Tel 214 245-6548 Autogiros still looking information Autogiros Carrier Focus Competition section can stop straining eyes hasnt appeared probably wont Since no real basis including autogiros within existing rules Bill Bischoff CLCB chairman has elected allow issue resolved rules cycle began January 1994 has published survey High-Low-Landing newsletter Navy Carrier Society NCS havent filled yours out yet dig out send results will used assist Navy Carrier Advisory Committee CLCB determining vote proposals will submitted arent member NCS theres still time join get survey sending $6 Mike Pugh HCR 51 Box 220 Stephenville TX 76401 have already seen draft proposal Bill Darkow would allow types rotary-wing aircraft modeled three classes Carrier Bill builder original Kayaba Ka- 1 model generated protest described October column Ill best keep informed issues develop sure read Focus Competition latest information Calculator Scoring Program portable computers becoming commonplace use contest management logical step AMA has used computers purpose Nationals will expanding use future least two PC-compatible programs scoring CL Navy Carrier plan publish before 1994 flying season will later column months offering much less expensive less complex solution automated score computation Radio Shack sells programmable 46function scientific calculator designation EC-4021 catalog number 65-984 has limited 40-step program memory can accommodate main program time no subprograms has three memory registers limited memory functions has basic arithmetic statistical trigonometric functions cannot truncate round numbers within memory capable logical switching After reading limitations may wondering mentioned mentioned because few redeeming characteristicsit readily available Radio Shack costs $1795 program memory though limited large enough store reasonably capable scoring program Navy Carrier also retains program turned off wrote program follows take advantage full program memory provide high degree accuracy flexibility program self-contained no additional calculations such averaging two watch readings required outside program no need remember constants calculator settings nothing must entered before program can run has enter times high speed record high-speed score scoresheet enter low-speed times record low-speed score enter landing bonus points write down total score problem program occasionally makes error final score Although problem sounds like fatal flaw bad sounds error never iho point occurs 25% timeThe displayed values high low total scores rounded nearest i/10 point required rules Because calculator cannot round numbers uses calculations cannot add displayed values get final score can add unrounded intermediate scores round final total occasional error easily detected comparing last digits high low-speed scores final score last digits high low scores 124 Model Aviation up final digit total score just correct total score plus minus 1 comparing last digits person could probably score Carrier contest United States next ten years never have error effect outcome See program graphics page Notice have purposefully selected times result error described previously checking last digits high low scores 4 0 adding can see last digit final score should 4 start new computation after recording final score simply press COMP key again reset program finishing score computation simply turn off calculator turn again press COMP key usual program requires operator input two watch readings both high low speed computations watch reliable enter single time twice no low speed score stop after computing high speed score finish scoring manually really want finish scoring using program must enter very small number low-speed time such 001 wrote program allow low-speed time zero causing calculator divide zeroan operation causes problems calculator Unfortunately calculator wont cooperate computing zero low-speed score will multiply constant Ki zero zero manually entered However will accept computed value zero same operation finds computed zero will substitute final score will error about half point owing program listing along comments explain program allow adapted other programmable calculators OPERATION 2ndF LRN 17993 2ndF l/x 2ndF x -4 Ki 2ndF TAB 1 2ndF HALT [x] 2 Ki 2ndF lIx MS 2ndF HALT [x] 2 Kl x MR x 10 2ndF HALT 2ndF HALT MR 2ndF LRN COMMENT Starts program record Constant used compute speed Inverse speed constant Store constant later use Round display decimal Temporarily stop program receive 1st high time Add Receive new input 2nd high time Complete calculation Divide Complete calcutation average watch readings Multiply constant Inverse product Store result memory Temporarily stop program display high speed mph receive 1st low time Add Receive new input 2nd low time Complete calculation Divide Complete calculation average watch readings Multiply constant Multiply Recall value memory Multiply Complete calculation Add low-speed score memory Temporarily stop program display low-speed score receive landing points Add landing points memory Temporarily stop program receive bonus points Add bonus points memory Recall value memory display now final score Ends program record April 1994 125 ensure program entered properly check program prior using enter values outcome known suggest following PRESSENTER COMP18 COMP182 COMP200 COMP202 COMP100 COMP10 COMP following summary describes program operation listing key press COMP key starts program continues program after temporary halt showing what will display program next stops indicating value enter calculator PRESSENTER COMPHigh Speed Time 1 COMPHigh Speed Time 2 COMPLow Speed Time 1 COMPLow Speed Time 2 COMPLanding Score COMPBonus Points COMP
Edition: Model Aviation - 1994/04
Page Numbers: 108, 109, 124, 125
CONTROL LINE NAVY CARRIER NATIONALS CARRIER As write havent chance read Joe Justs description 1993 Nationals Navy Carrier activities having talked him others attended Nationals certainly sounded like super year Youve already seen close scores separated contestants Quite few modelers achieved personal best scores Pete Mazur set new record Class last column promised look equipment used last Nationals High speeds up last year classes whole better last four years Bill Melton Pete Mazur topped 90 mph Profile Four Class models went 100 mph Bill Melton achieved 1071 using Superligre X 40 followed Joe Dzialo Peter Mazur Brian Silversmith 102s Class II John Castiglioni Bill Melton Pete Mazur topped 105 mph Overall top speed contest went John Castiglionis Rossi 65-powered Grumman F4F-3 Wildcat Rev-up 11 x 8 prop pulled 210-square-inch model 1129 mph Profile Carrier Bill Bischoff managed overall best time year using Wiley 36 engine APC prop Bill Meltons first appearance Nelson 36 1 mph slower infonnation Wiley engine appears later column Melton used 0S carburetor Rev-Up 9 x 7 prop also top 90 mph both models likely better accumulate some time Watch out next year Slow speeds best Nationals quite some time Three Class Ils six Class topped three minutes Five Profiles over four minutes winner Bill Melton over five minutes 3095 seconds As past larger aircraft lighter wing loadings dominated slow-flight performance Scale classes exception Joe Dzialos Class II Bearcat tipped scales three pounds 10 ounces yet still did better three minutes slow flight MO- ls still predominant aircraft accounted almost half Profiles year first time Credit probably goes Bill Bischoff other modelers Texas have developing Profile MO-ls past few years Theyve encouraging other CL modelers try Carrier produced kits MO- 1 almost Guardians six MO-ls eight P-51 Mustang Grumman Bearcat Consolidated TBY-1 Sea Wolf rounded out pack larger MO-ls took top places Classes land II accounted half fewer top six places event top speeds both Scale classes went smaller models though over 200 square inches wing area placing smaller models MO-Is indicates still plenty opportunity such models event Since Nationals Ive received number calls modelers looking ideas models other MO- 1 should some new model types flight line next year As past large engines dominated Class II taking five top seven places scoring five fastest speeds OS 65 DF Rossi preferred engines three OS 46s also class Pete Mazurs winning Webra Speed 61 K&B 66 completed field Class K&B engine choice K&B people shouldnt running bank however K&Bs used out production winning K&B 40S almost qualifies antique Pete Mazur sure knows keep running OS Picco SuperTigre engines powered rest class propeller department Rev-Up relinquished its top spot APC Landing Products year Part increase probably due increased number modelers running left-hand-rotation engines APC has good variety pusher props engines best top speeds Class II recorded Rev-Up props APC fastest Profile glowplug choice remains Fox RC plugby two second popular plug K&B iL research done Bill Bischoff seemed confirmed results Bill found K&B IL allowed higher engine speeds Fox RC engines classes Fox outnumbered among highest speeds recorded no trick control systems year contestants provided information listed derivatives J Robert Smurthwaite s original Flight Control three-line control system 108 Model Aviation Blschoffs Profile MO-i uses foam Bill Bischoff used Willy Wileys LH- Roland Baltes Class II Nostalgia Carrier wing speed construction Column has crankshaft 36 AAC engine fastest high Curtiss SB2C Helldiver rolls down details availability foam cores speed Profile Nationals deck USS North Island Roland Baltes Chance Vought F8U Corsair makes low pass model painted post-WW II US Navy training colors Throttle systems very straightforward Profile Carrier usual Scale classes variety systems using crankcase pressure dominated Most used combination metering commercial carburetor combination variable exhaust restrictor John Castiglioni again showed off machining skills original throttle systems engines flown Joe Dzialo least pump-equipped engineBill Bischoffs Class entry Because used 05 4D carburetor rather 4E carb larger bore suspect pump used consistency engine run increased power Bills Class II entry 0S 46SF also used 4D carb suction difference models fuel tank placement Class II model tank wing its lateral placement could produce consistent fuel head side-mounted engine models flew almost identical high low speeds Foam Wings MO-i Phil Cartiers CoreHouse760 Waltonville Road Hummelstown PA 17036 Tel 717 566-3810is offering foam wings MO-i patterned after used Bill Bischoff others Texas Profile Class I/il MO-ls three-section wings 44 inches span scale outline produce total wing area 360 square inches required cut center section proper span fuselage being used glue panels together add ars shape tips cover Contact Phil exact prices obtain information other offerings catalog $1 Combat wings make good starting points 15 Carrier models Wiley 36 Engine new engine appeared Profile Carrier circle 1993 Nationals 36 AAC design produced Willy Wiley saw prototype revisited George Aldrich last May Quality excellent performance also quite good very light engine nine ounces carburetor weighing slightly less Fox Combat Special about same old ST 35 Bill Bischoff used achieve fastest time Profile Carrier 0S 4D carburetor installed November being written production engine hold An agreement produce engine Fox did materialize Willy within weeks starting production again newly outfitted machine shop time read this very promising engine will again production Wiley 36 AAC acheives its lightness careful selection materials cutting out metal needed strength engine originally designed Combat Continued page 124 eee T r iriTititi April 1994 109 YES THE TWiN-AIR 20 IS HERE AT LAST YES THE iWN-AIR 20 REALLY CAN BE CONTROLLED ON JUST ONE ENGINE YES THE TWiN-AIR 20 OFFERS THE SAME HIGH QUALITY PERFOR MANCE EASE OF FLYING AND HANDLING AEROBATiC CAPABILI TIES FUN TO BUILD AND FUN TO FLY FEATURES FOUND IN ALL NORTHEAST AERODYNAMIC KITS THE TRAIN-AIRS BEL-AIRS AND SPORT AIR YES ITS FROM . NORTHEAST AERODYNAMICS INC 4 NORTHEA ST AERODYNAMICS INCM 150 ROBINSON ROAD ON NH 03051 881-5899 Specifications Engine Requirement -Two 20-30 Wing Span 58 Wing Area 625 Sq 434 Sq Fuselage Length -43 Fuselage Width 35 Overall Weight Range 55 65 pounds Wing Loading Range 195 239 Sq Ft Radio Functions -4 Channel Great Selection D 55721423 16&60z EDEDED Super Prices U 14 oz 38w Plain ave 25yds mm $150/yd 3 16 oz 50w Satin Weave 25 yds mm $4OOIyd Minimum order 1 yd VISA-MASTERCARD FAST SERVICE ORDER TOLL-FREE 800-338-1278 Dealer & Mfg inquiries welcome Send $3 postage & handling FREE catalog rII U U Important note fiddling piston shims possible run piston up high enough bore crash piston glowbead Take conservative approach adding 005 head shim 004 piston shim always double-check interference between piston head before starting engine attempting squeeze mix really tightly may find measured clearance being negative piston does actually hit glowbead close look Cox glowhead chamber will explain advised flirting disaster especially switching back forth between Cox 1702 GloBee GB-SR using 40% higher nitro fuel probably using too much compression anyway typical VA 049 comes factory set up way Russians like run engines Lots revs quite small props specific engine has approximately 1600 exhaust timing negative clearance head shims installed 004 between glowbead glowbead seat setup okay run-in Grish S x 3 prop cut 4 diameter although may want install total two three head shims order extend life glowhead during run-in CL Combat guys may want run two just piston shim conjunction 40% 50% nitro fuel very small diameter prop FF RC applications larger diameter props effective will require less timing/increased torque piston shims increased torque setup total three piston shims being suggested starting point Beginning stock run-in engine simply remove piston carrier hooking big end rod crankpin unscrewing piston Finger pressure remember piston free carrier add two piston shims being certain seated properly before reinstalling piston camer late June early July year premier Combat event takes place Seattle area Washington Bladder Grabber features triple-elimination AMA Fast Combat format coupled stereo prizes total $12000 worth Carver equipment Bladder Grabber 18 1993 top pilot Allen Deveuve San Diego California photographs accompany column show Allen getting traditional handshake Howard Rush congratulatory dousing ice water ever-mischievous Phil Granderson Its good contest win Plan trip Pacific Northwest 1994 avy Carrier/Perry Continued paqe 109 competition plenty strong enough environment Profile Carrier engine intake sized fit OS 4-series carburetor 135mm 532 inches carburetor included Standard configuration left-hand-rotation crankshaft use pusher props Bill Bischoffs 904 mph high speed Nationals achieved PAC 9 x 6P prop 40% nitro fuel Static rpm combination 17000 Timing follows 1600 exhaust l26 transfer boost open together intake open 400 ABDC close 550 ATDC Willy experimenting extending intake closing Right now 650 ATDC seems practical limit Carrier engine speeds Combat crankshaft could subsituted produce engine conventional right-hand rotation however timing different Combat engine designed 21500rpm 8 x 6 prop closes 720 ATDC may affect idle could present blowback problems lower Carrier engine speeds Youre own engine costs $175 bad considering dont have work top performance Custom lefthand cranks available engine $100 K&B 58 left-hand cranks available $50 Contact Willy Wileys Custom Motors 15605 Wright Brothers Addison TX 75244 Tel 214 245-6548 Autogiros still looking information Autogiros Carrier Focus Competition section can stop straining eyes hasnt appeared probably wont Since no real basis including autogiros within existing rules Bill Bischoff CLCB chairman has elected allow issue resolved rules cycle began January 1994 has published survey High-Low-Landing newsletter Navy Carrier Society NCS havent filled yours out yet dig out send results will used assist Navy Carrier Advisory Committee CLCB determining vote proposals will submitted arent member NCS theres still time join get survey sending $6 Mike Pugh HCR 51 Box 220 Stephenville TX 76401 have already seen draft proposal Bill Darkow would allow types rotary-wing aircraft modeled three classes Carrier Bill builder original Kayaba Ka- 1 model generated protest described October column Ill best keep informed issues develop sure read Focus Competition latest information Calculator Scoring Program portable computers becoming commonplace use contest management logical step AMA has used computers purpose Nationals will expanding use future least two PC-compatible programs scoring CL Navy Carrier plan publish before 1994 flying season will later column months offering much less expensive less complex solution automated score computation Radio Shack sells programmable 46function scientific calculator designation EC-4021 catalog number 65-984 has limited 40-step program memory can accommodate main program time no subprograms has three memory registers limited memory functions has basic arithmetic statistical trigonometric functions cannot truncate round numbers within memory capable logical switching After reading limitations may wondering mentioned mentioned because few redeeming characteristicsit readily available Radio Shack costs $1795 program memory though limited large enough store reasonably capable scoring program Navy Carrier also retains program turned off wrote program follows take advantage full program memory provide high degree accuracy flexibility program self-contained no additional calculations such averaging two watch readings required outside program no need remember constants calculator settings nothing must entered before program can run has enter times high speed record high-speed score scoresheet enter low-speed times record low-speed score enter landing bonus points write down total score problem program occasionally makes error final score Although problem sounds like fatal flaw bad sounds error never iho point occurs 25% timeThe displayed values high low total scores rounded nearest i/10 point required rules Because calculator cannot round numbers uses calculations cannot add displayed values get final score can add unrounded intermediate scores round final total occasional error easily detected comparing last digits high low-speed scores final score last digits high low scores 124 Model Aviation up final digit total score just correct total score plus minus 1 comparing last digits person could probably score Carrier contest United States next ten years never have error effect outcome See program graphics page Notice have purposefully selected times result error described previously checking last digits high low scores 4 0 adding can see last digit final score should 4 start new computation after recording final score simply press COMP key again reset program finishing score computation simply turn off calculator turn again press COMP key usual program requires operator input two watch readings both high low speed computations watch reliable enter single time twice no low speed score stop after computing high speed score finish scoring manually really want finish scoring using program must enter very small number low-speed time such 001 wrote program allow low-speed time zero causing calculator divide zeroan operation causes problems calculator Unfortunately calculator wont cooperate computing zero low-speed score will multiply constant Ki zero zero manually entered However will accept computed value zero same operation finds computed zero will substitute final score will error about half point owing program listing along comments explain program allow adapted other programmable calculators OPERATION 2ndF LRN 17993 2ndF l/x 2ndF x -4 Ki 2ndF TAB 1 2ndF HALT [x] 2 Ki 2ndF lIx MS 2ndF HALT [x] 2 Kl x MR x 10 2ndF HALT 2ndF HALT MR 2ndF LRN COMMENT Starts program record Constant used compute speed Inverse speed constant Store constant later use Round display decimal Temporarily stop program receive 1st high time Add Receive new input 2nd high time Complete calculation Divide Complete calcutation average watch readings Multiply constant Inverse product Store result memory Temporarily stop program display high speed mph receive 1st low time Add Receive new input 2nd low time Complete calculation Divide Complete calculation average watch readings Multiply constant Multiply Recall value memory Multiply Complete calculation Add low-speed score memory Temporarily stop program display low-speed score receive landing points Add landing points memory Temporarily stop program receive bonus points Add bonus points memory Recall value memory display now final score Ends program record April 1994 125 ensure program entered properly check program prior using enter values outcome known suggest following PRESSENTER COMP18 COMP182 COMP200 COMP202 COMP100 COMP10 COMP following summary describes program operation listing key press COMP key starts program continues program after temporary halt showing what will display program next stops indicating value enter calculator PRESSENTER COMPHigh Speed Time 1 COMPHigh Speed Time 2 COMPLow Speed Time 1 COMPLow Speed Time 2 COMPLanding Score COMPBonus Points COMP
Edition: Model Aviation - 1994/04
Page Numbers: 108, 109, 124, 125
CONTROL LINE NAVY CARRIER NATIONALS CARRIER As write havent chance read Joe Justs description 1993 Nationals Navy Carrier activities having talked him others attended Nationals certainly sounded like super year Youve already seen close scores separated contestants Quite few modelers achieved personal best scores Pete Mazur set new record Class last column promised look equipment used last Nationals High speeds up last year classes whole better last four years Bill Melton Pete Mazur topped 90 mph Profile Four Class models went 100 mph Bill Melton achieved 1071 using Superligre X 40 followed Joe Dzialo Peter Mazur Brian Silversmith 102s Class II John Castiglioni Bill Melton Pete Mazur topped 105 mph Overall top speed contest went John Castiglionis Rossi 65-powered Grumman F4F-3 Wildcat Rev-up 11 x 8 prop pulled 210-square-inch model 1129 mph Profile Carrier Bill Bischoff managed overall best time year using Wiley 36 engine APC prop Bill Meltons first appearance Nelson 36 1 mph slower infonnation Wiley engine appears later column Melton used 0S carburetor Rev-Up 9 x 7 prop also top 90 mph both models likely better accumulate some time Watch out next year Slow speeds best Nationals quite some time Three Class Ils six Class topped three minutes Five Profiles over four minutes winner Bill Melton over five minutes 3095 seconds As past larger aircraft lighter wing loadings dominated slow-flight performance Scale classes exception Joe Dzialos Class II Bearcat tipped scales three pounds 10 ounces yet still did better three minutes slow flight MO- ls still predominant aircraft accounted almost half Profiles year first time Credit probably goes Bill Bischoff other modelers Texas have developing Profile MO-ls past few years Theyve encouraging other CL modelers try Carrier produced kits MO- 1 almost Guardians six MO-ls eight P-51 Mustang Grumman Bearcat Consolidated TBY-1 Sea Wolf rounded out pack larger MO-ls took top places Classes land II accounted half fewer top six places event top speeds both Scale classes went smaller models though over 200 square inches wing area placing smaller models MO-Is indicates still plenty opportunity such models event Since Nationals Ive received number calls modelers looking ideas models other MO- 1 should some new model types flight line next year As past large engines dominated Class II taking five top seven places scoring five fastest speeds OS 65 DF Rossi preferred engines three OS 46s also class Pete Mazurs winning Webra Speed 61 K&B 66 completed field Class K&B engine choice K&B people shouldnt running bank however K&Bs used out production winning K&B 40S almost qualifies antique Pete Mazur sure knows keep running OS Picco SuperTigre engines powered rest class propeller department Rev-Up relinquished its top spot APC Landing Products year Part increase probably due increased number modelers running left-hand-rotation engines APC has good variety pusher props engines best top speeds Class II recorded Rev-Up props APC fastest Profile glowplug choice remains Fox RC plugby two second popular plug K&B iL research done Bill Bischoff seemed confirmed results Bill found K&B IL allowed higher engine speeds Fox RC engines classes Fox outnumbered among highest speeds recorded no trick control systems year contestants provided information listed derivatives J Robert Smurthwaite s original Flight Control three-line control system 108 Model Aviation Blschoffs Profile MO-i uses foam Bill Bischoff used Willy Wileys LH- Roland Baltes Class II Nostalgia Carrier wing speed construction Column has crankshaft 36 AAC engine fastest high Curtiss SB2C Helldiver rolls down details availability foam cores speed Profile Nationals deck USS North Island Roland Baltes Chance Vought F8U Corsair makes low pass model painted post-WW II US Navy training colors Throttle systems very straightforward Profile Carrier usual Scale classes variety systems using crankcase pressure dominated Most used combination metering commercial carburetor combination variable exhaust restrictor John Castiglioni again showed off machining skills original throttle systems engines flown Joe Dzialo least pump-equipped engineBill Bischoffs Class entry Because used 05 4D carburetor rather 4E carb larger bore suspect pump used consistency engine run increased power Bills Class II entry 0S 46SF also used 4D carb suction difference models fuel tank placement Class II model tank wing its lateral placement could produce consistent fuel head side-mounted engine models flew almost identical high low speeds Foam Wings MO-i Phil Cartiers CoreHouse760 Waltonville Road Hummelstown PA 17036 Tel 717 566-3810is offering foam wings MO-i patterned after used Bill Bischoff others Texas Profile Class I/il MO-ls three-section wings 44 inches span scale outline produce total wing area 360 square inches required cut center section proper span fuselage being used glue panels together add ars shape tips cover Contact Phil exact prices obtain information other offerings catalog $1 Combat wings make good starting points 15 Carrier models Wiley 36 Engine new engine appeared Profile Carrier circle 1993 Nationals 36 AAC design produced Willy Wiley saw prototype revisited George Aldrich last May Quality excellent performance also quite good very light engine nine ounces carburetor weighing slightly less Fox Combat Special about same old ST 35 Bill Bischoff used achieve fastest time Profile Carrier 0S 4D carburetor installed November being written production engine hold An agreement produce engine Fox did materialize Willy within weeks starting production again newly outfitted machine shop time read this very promising engine will again production Wiley 36 AAC acheives its lightness careful selection materials cutting out metal needed strength engine originally designed Combat Continued page 124 eee T r iriTititi April 1994 109 YES THE TWiN-AIR 20 IS HERE AT LAST YES THE iWN-AIR 20 REALLY CAN BE CONTROLLED ON JUST ONE ENGINE YES THE TWiN-AIR 20 OFFERS THE SAME HIGH QUALITY PERFOR MANCE EASE OF FLYING AND HANDLING AEROBATiC CAPABILI TIES FUN TO BUILD AND FUN TO FLY FEATURES FOUND IN ALL NORTHEAST AERODYNAMIC KITS THE TRAIN-AIRS BEL-AIRS AND SPORT AIR YES ITS FROM . NORTHEAST AERODYNAMICS INC 4 NORTHEA ST AERODYNAMICS INCM 150 ROBINSON ROAD ON NH 03051 881-5899 Specifications Engine Requirement -Two 20-30 Wing Span 58 Wing Area 625 Sq 434 Sq Fuselage Length -43 Fuselage Width 35 Overall Weight Range 55 65 pounds Wing Loading Range 195 239 Sq Ft Radio Functions -4 Channel Great Selection D 55721423 16&60z EDEDED Super Prices U 14 oz 38w Plain ave 25yds mm $150/yd 3 16 oz 50w Satin Weave 25 yds mm $4OOIyd Minimum order 1 yd VISA-MASTERCARD FAST SERVICE ORDER TOLL-FREE 800-338-1278 Dealer & Mfg inquiries welcome Send $3 postage & handling FREE catalog rII U U Important note fiddling piston shims possible run piston up high enough bore crash piston glowbead Take conservative approach adding 005 head shim 004 piston shim always double-check interference between piston head before starting engine attempting squeeze mix really tightly may find measured clearance being negative piston does actually hit glowbead close look Cox glowhead chamber will explain advised flirting disaster especially switching back forth between Cox 1702 GloBee GB-SR using 40% higher nitro fuel probably using too much compression anyway typical VA 049 comes factory set up way Russians like run engines Lots revs quite small props specific engine has approximately 1600 exhaust timing negative clearance head shims installed 004 between glowbead glowbead seat setup okay run-in Grish S x 3 prop cut 4 diameter although may want install total two three head shims order extend life glowhead during run-in CL Combat guys may want run two just piston shim conjunction 40% 50% nitro fuel very small diameter prop FF RC applications larger diameter props effective will require less timing/increased torque piston shims increased torque setup total three piston shims being suggested starting point Beginning stock run-in engine simply remove piston carrier hooking big end rod crankpin unscrewing piston Finger pressure remember piston free carrier add two piston shims being certain seated properly before reinstalling piston camer late June early July year premier Combat event takes place Seattle area Washington Bladder Grabber features triple-elimination AMA Fast Combat format coupled stereo prizes total $12000 worth Carver equipment Bladder Grabber 18 1993 top pilot Allen Deveuve San Diego California photographs accompany column show Allen getting traditional handshake Howard Rush congratulatory dousing ice water ever-mischievous Phil Granderson Its good contest win Plan trip Pacific Northwest 1994 avy Carrier/Perry Continued paqe 109 competition plenty strong enough environment Profile Carrier engine intake sized fit OS 4-series carburetor 135mm 532 inches carburetor included Standard configuration left-hand-rotation crankshaft use pusher props Bill Bischoffs 904 mph high speed Nationals achieved PAC 9 x 6P prop 40% nitro fuel Static rpm combination 17000 Timing follows 1600 exhaust l26 transfer boost open together intake open 400 ABDC close 550 ATDC Willy experimenting extending intake closing Right now 650 ATDC seems practical limit Carrier engine speeds Combat crankshaft could subsituted produce engine conventional right-hand rotation however timing different Combat engine designed 21500rpm 8 x 6 prop closes 720 ATDC may affect idle could present blowback problems lower Carrier engine speeds Youre own engine costs $175 bad considering dont have work top performance Custom lefthand cranks available engine $100 K&B 58 left-hand cranks available $50 Contact Willy Wileys Custom Motors 15605 Wright Brothers Addison TX 75244 Tel 214 245-6548 Autogiros still looking information Autogiros Carrier Focus Competition section can stop straining eyes hasnt appeared probably wont Since no real basis including autogiros within existing rules Bill Bischoff CLCB chairman has elected allow issue resolved rules cycle began January 1994 has published survey High-Low-Landing newsletter Navy Carrier Society NCS havent filled yours out yet dig out send results will used assist Navy Carrier Advisory Committee CLCB determining vote proposals will submitted arent member NCS theres still time join get survey sending $6 Mike Pugh HCR 51 Box 220 Stephenville TX 76401 have already seen draft proposal Bill Darkow would allow types rotary-wing aircraft modeled three classes Carrier Bill builder original Kayaba Ka- 1 model generated protest described October column Ill best keep informed issues develop sure read Focus Competition latest information Calculator Scoring Program portable computers becoming commonplace use contest management logical step AMA has used computers purpose Nationals will expanding use future least two PC-compatible programs scoring CL Navy Carrier plan publish before 1994 flying season will later column months offering much less expensive less complex solution automated score computation Radio Shack sells programmable 46function scientific calculator designation EC-4021 catalog number 65-984 has limited 40-step program memory can accommodate main program time no subprograms has three memory registers limited memory functions has basic arithmetic statistical trigonometric functions cannot truncate round numbers within memory capable logical switching After reading limitations may wondering mentioned mentioned because few redeeming characteristicsit readily available Radio Shack costs $1795 program memory though limited large enough store reasonably capable scoring program Navy Carrier also retains program turned off wrote program follows take advantage full program memory provide high degree accuracy flexibility program self-contained no additional calculations such averaging two watch readings required outside program no need remember constants calculator settings nothing must entered before program can run has enter times high speed record high-speed score scoresheet enter low-speed times record low-speed score enter landing bonus points write down total score problem program occasionally makes error final score Although problem sounds like fatal flaw bad sounds error never iho point occurs 25% timeThe displayed values high low total scores rounded nearest i/10 point required rules Because calculator cannot round numbers uses calculations cannot add displayed values get final score can add unrounded intermediate scores round final total occasional error easily detected comparing last digits high low-speed scores final score last digits high low scores 124 Model Aviation up final digit total score just correct total score plus minus 1 comparing last digits person could probably score Carrier contest United States next ten years never have error effect outcome See program graphics page Notice have purposefully selected times result error described previously checking last digits high low scores 4 0 adding can see last digit final score should 4 start new computation after recording final score simply press COMP key again reset program finishing score computation simply turn off calculator turn again press COMP key usual program requires operator input two watch readings both high low speed computations watch reliable enter single time twice no low speed score stop after computing high speed score finish scoring manually really want finish scoring using program must enter very small number low-speed time such 001 wrote program allow low-speed time zero causing calculator divide zeroan operation causes problems calculator Unfortunately calculator wont cooperate computing zero low-speed score will multiply constant Ki zero zero manually entered However will accept computed value zero same operation finds computed zero will substitute final score will error about half point owing program listing along comments explain program allow adapted other programmable calculators OPERATION 2ndF LRN 17993 2ndF l/x 2ndF x -4 Ki 2ndF TAB 1 2ndF HALT [x] 2 Ki 2ndF lIx MS 2ndF HALT [x] 2 Kl x MR x 10 2ndF HALT 2ndF HALT MR 2ndF LRN COMMENT Starts program record Constant used compute speed Inverse speed constant Store constant later use Round display decimal Temporarily stop program receive 1st high time Add Receive new input 2nd high time Complete calculation Divide Complete calcutation average watch readings Multiply constant Inverse product Store result memory Temporarily stop program display high speed mph receive 1st low time Add Receive new input 2nd low time Complete calculation Divide Complete calculation average watch readings Multiply constant Multiply Recall value memory Multiply Complete calculation Add low-speed score memory Temporarily stop program display low-speed score receive landing points Add landing points memory Temporarily stop program receive bonus points Add bonus points memory Recall value memory display now final score Ends program record April 1994 125 ensure program entered properly check program prior using enter values outcome known suggest following PRESSENTER COMP18 COMP182 COMP200 COMP202 COMP100 COMP10 COMP following summary describes program operation listing key press COMP key starts program continues program after temporary halt showing what will display program next stops indicating value enter calculator PRESSENTER COMPHigh Speed Time 1 COMPHigh Speed Time 2 COMPLow Speed Time 1 COMPLow Speed Time 2 COMPLanding Score COMPBonus Points COMP