S IF THE Free Flight Community become organized employ outside study group evaluate report State-of the-AA Free Flight would likely surprise Such group would probably report no state-of-the-art rather giant spectrum spanning 45-year period less narrowthe field abit eliminate Old-Timer activity concentrate study competitive Power flying would still find incredible variety equipment use thing docile Dusters automated futur istic Bombs grace flying fields wait Isnt what makes Free Flight great fact well-trimmed model put right alr consistently can finish winners circle what keeps us coming back Free Flight has changed will continue promise change provides challenge keeps fliers interested Shrinking flying sites have brought about changes new rules written Category 111 now III Since performance name game Free Flight new design concepts developed match evershortening engine runs Smaller faster models powerful engines have emerged large slow-climbing floaters have given way higher climbing designs depend altitude good alr attain maxes design parameters have created own special problems typical Free Flight model today compromise maintain suitable giide re quires sufficient angular differences between wing stabilizer longitudinal dihedral creates problem during high-speed power portion flight model tends climb up arc allowed continue would result disastrous loop condition typically controlled inducing turn usually transforms loop spiral climb turn also helps alleviate potential stall end engine run providing smooth transition power glide As powerful engines installed smaller smaller alrframes condition becomes difficult impossible control British have dealt small-field condi tions years have experienced same problems successful approach challenge demonstrated classic Dixielander 350 sq design Class small B engines utilizes huge stabilizer operates center-of-gravity CG inch behind wing tralling edge ship has very high pylon employs no downthrust Such force layout enables control high power quite well still has its limitations Another approach variable incidence tailplane VIT commonly referred combined auto rudder AR system standard equipment typical FAI Power ship allows separate stabilizer rudder set tings power giide porti6ns flight means course gadgetry multifunc tion timerand potential malfunction Proper installation careful malntenance pre-flight checks will minimize hazard VIT-AR system actually alters Free Flight concept somewhat allows pre-programmed flight 48 Model Aviation first glance would appear complicated fly VIT-AR models equipped actually easier trim have better chance surviving crucial first flights brings us subject hand Sea Power use 29 engine call Bee Power designed VIT trainer wanted model would perform spectacularly same time allow gain experience programmable tail feathers model tell should eventually become involved FAI Power class Sea Power has opened new horizons Free Flight power typifies state art indeed exists Sea Power trainer definitely beginners model Due will offering glue-stick-A-to-former-B construc tion sequences Rather will mention few particular points spend remainder space trimming flying techniques will note abundance wood wing stabilizer structures Weight vital factor Free Flight construction expense structural strength model really moves out under power added structure essential prevent flutter high speeds withstand dethermalizer DT loads end engine run testing Similarly plastic covering mater ials recommended GM-grade silkapan wings 00-grade stabilizer provide necessary rigidity pylon laminated resistance flexing has hardwood insert attaching aluminum wing mount have trouble locating round aluminum stock wing mount anchor nuts saw couple lengths off small X-Acto knife handle aluminum rest quarter-circle plywood wing-key system works great twin landing-skid system useful model sitting ground preparation pre-flight servicing helps avoid punctures covering upon landing de thermalizing Two nose styles shown plan faired-in wood engine mount system used original durable attractive lot extra work alternate commercial mount bolted firewall much simpler does create drag Most us used fabricating built-up profile fuselages Sea Power uses built-up box Start bottom sheet cut size lower stringers attached Pin building board Cut Out sides install upper stringers Glue sides bottom install formers pylon Add top sheeting Most Class C strong Class B engine can used fly ship C good Fox 36X Combat engine 10-4 prop Class B events special 29 piston sleeve fitted Fox 36X case crankshaft tuned turn 10-4 prop same rpm 36 several good VIT-AR systems use today explain would beyond scope construction article have some advantages disadvantages system used Sea Power typical could altered suit individual tastes affecting performance Basically what needed devices retain stabilizer low incidence angle climb means increase angle glide finally provisions dethermalizing Auto-rudders merely provide two adjustable settings climb glide stabilizer Sea Power held down trailing edge against plywood incidence shim aluminum arm mounted left side fin leading edge nylon line routed through aluminum tube guides timer arm used control stabilizer incidence line released stabilizer rises rubberband February 1981 49 Three-quarter rearview emphasizes long tail moment arm allows minimal ares stabilizer providing precise model control Rear fuselage has no formers allowing free passage lines operate VIT-AR Authors model set up right-handed fliers Engine exhaust left helps keep timer mechanism free oil Left-handed fliers will want reverse system Make special effort keep timer clean workina DroDerlvmalfunction disaster Twin skids help prevent damage model ison ground Wing rest madefrom aluminum sheet quarter-circle plywood keys maintain wing alignment Seelig multi-function timer controls engine run stab incidence rudder settingsfor power glide well dethermalizing Rubber band tension critical too little allows unwanted control movement too much causes timer malfunction pre-flight check systems absolutely essentiala good habit case tension until contacts glide arm mounted right side fin arm has precise adjustment form stop-screw lock nut glide arm retained line dethermalizer arm timer line released stabilizer pops up DT position DT angle limited line passing through aluminum tube fuselage auto-rudder simply held against climb stop against rubberband tension line timer line released rubber tension pulls rudder over against glide stop same timer controls flight pattern used shut down engine end power run accomplished use flood-off valve dumps fuel under pressure engines intake accomplish requires timer capable four separate functions first flew Sea Power homemade timer fabricated K-Mart camera timer timer allowed fhree functions englne flood-off auto stab auto rudder Dethermalizing accomplished fuse Because stubby output shaft timer functions controlled single disk feature eliminated possibility easily varying timing various functions negating desirable features VIT-AR system highly recommend invest Seelig timer venture programmable Free Flight Its cost will repaid ease trimming during potentially risky initial flights Prior going flying field several final checks order Check center-of-gravity indicated plans add ballast necessary achieve proper balance Check timer ensure arms riding bottoms grooves wire arms have known jump out grooves under tension rudder arm instant launch can imagine what ship would under powerwith rudder glide position think get picture Also sure notches timer disk deep enough allow release timer arms proper time file deeper learn both lessons hard way during later initiation FM Power Assemble model same number rubberbands will use flying Check LIZEIIiIL TRIM FOR CENTER PLANKING I1/1K PLY WING KEYS LEADING LOGE /2 SO U_ LLrnII~II_ -PIfiiII 0 T/WD3/N SPAN IND N P1 SINLISRAL sALL CENTER PANEL AWE N I/NOSAK - it 4 I/5K S/4 3/DO WEE11KG5/32 WIN 00 I/G 0 TRAILING EDGE S/IN DOWEL WING KEYS ALTERNATE ROSE DETAIL ONE KONG SO TORDOT OFFSET MN LEADING LOGE I/O _____If jj ~K MAIN RING 0-40 FLAT ALSO SCREWS 3/N C I/O MAPLEALUM ARID MOKINTI/O SD STRINGERS vx I::-M 00 S/SD SREET TO U L LAMINATES PYLON IWIM STRINGERS TO ISIANALE 78 OFIMOERSALT SLOOCAI/O CORE S/3D FACESDOCTOR THIS POINT AFT S/RI OGRIEL IGRAIN DIRECTION 1/4 01/2 HARDWOOD FGEL TANKSAN ALOM NAGSLIDE-DT ARM LINE FLOOD GPFDRILL N TAP 4-GOLEFT RIGHTPOWER ARM LIRE VALVENODDER LINE COOL 7 CII-ii- Yi~3/32ALSM TONE I, 0II II III F-IF2 4 DOLTH F-S SOFT MOCKUA sure wing stab adequately secure keeping mind fast model VIT AR arm lines terminate loops Rubberbands tied loops complete hookup timer arms sure rubberband tension enough resist flight loads Stabilizer trailing edges tend rise under power sure enough tension used same tension will affect seating timer arms grooves Check check double check Operate timer control functions times sure everything order before going field first step field determine approx imate control settings glide Hook glide arm line timer power arm rudder line should connected As starting point adjust glide arm screw allow stab trailing edge 3/16-in -in above fuselage rudder have approximately F-SF-KPYLON LOTENDS TO NOTTON o-in right offset Test-glide model make appropriate adjustments obtain glide settings roughly correct basic setting lower stabilizer trailing edge about 3/32- -in initial power setting Place shims under stab provide seat power arm hold stabilizer against Set rudder amidship straight initial test flight Hook up control functions start englne check proper flood-off timer opera tion Flood-off must positive engine does stop instantly may fly through timer functions resultant control surface changes gives disastrous results engine does stop instantly may need drill out flood-off fitting allow fuel flow dont drill out large fitting weakened becomes problem use Continued page 121 50 Model Aviation Close-up floodoff system Line timer t cable Wire arm flood valve acts spring tension line Looped line filling tank Better system fuel through engine feed flood lines Goes best 10-4 prop Speartish designed Leroy Cordes fit planform moments Harry Higleys MoHo models averaging around 350 sq wing area maximum 380 very few 300 sq minimum Profile-class models also seem getting heavier maximum 48 oz lightest Guardian Les Pardue weighed 28 oz TWA engine average seemed 34 35 oz Supertigre engines three four ounces heavier specialty engines top seven airplanes averaged just under 38 oz average entries little over 35 oz Navy Carrier Society dinner following Nats competition discussion rules 25 Carrier fliers opinions expressed rather different obtained year ago important decisions reached either unanimous very close Everyone seems resolved inevitability specialty engines concerned about rising cost powerplants limited availability reversal last years survey fliers voted recommend change ball-bearing engines 1982 keeping other engine restrictions change proposal has submitted AMA would combine Class Class II adopt equivalent Class Profile event no engine restrictions set up Junior Senior Profile event no auxiliary surfaces sliders etc stock plain bearing engines CL-82-7 group unanimously opposed such change consensus such radical changes may acceptable local basis national implementation would disastrous Profile bonus points discussed length RichardL Perry 416 Woodhill Drive Golds boro NC 27530 Sea Power/Haught Continued page 50 larger #6 fitting Take note thread failure flood-off fitting will allow engine run until fuel exhausted Repeat engine cut off test several times observe effects engine vibration timer functions well ready flight first flight will have engine run no less two nor three seconds Set power arm stabilizer timer disk -to 1sec delay after engine cut Hook power arm timer hook glide ann anything Set rudder disk 3-sec delay afterstabilizerreleases Hook up rudder timer arm setup will provide instant DT after engine cut giide arm held place Test-run timer ensure adjustments correct Hook up lines again make visual inspection hookups control positions Make rigid rule prior flight Ensure timer fully wound Start engine launch 60- 70-degree angiejust right wind Note climb angie andturn tendency Model should maintain launch angie show slight tendency turn right Observe DT rate descent Correct climb angle adjusting height stab shims Increase height steepen climb vice versa Adjust rudder needed DT too fast lower DT angle slightly Continue 3-sec tests until satisfied climb angle turn tendency satisfied power pattern will safe readjust timer power arm disk stabilizer 3-sec delay after engine cut reduce wing strain speed builds up succes sive flights longer engine run Increase engine run second fly model again Continue observe power pattern engine run increased 1-sec intervals hurry process Make adjustment time keep small attempt transist glide until have attained 7-sec power run may increase delay DT appears putting heavy load wings point should getting good steep climb around 65-70 degrees about three-quarters turn right now ready work transition Adjust DT disk 15 seconds hook up glide arm line DT arm well other lines respective places Watch model closely engine cuts Model should transist smoothly Poor transitions often due improper rudder trimming rudder brought tripped too early will cause right wing go down due kicking tail right results diving turn after engine cut Bad news Late rudder often results stalling Tripping stabilizer too soon results upward pitching stall Releasing stabilizer too late allows model dive Hopefully can get glimpse glide before DT. Remember REVENGER 60-Size Pattern Designed Revenge can sweet new Revenger pattern design can win 65-inch span laminar-flow wing 700 square-inch area helps perform AMA-FAI man euvers new kind smooth ness can read about May 1978 RC Modeler Revenger comes highly prefabricated balsa fuselage assembled sanded Foam wing panels stabilizer presheeted sanded vertical fin Dick Russ rudder presanded shape contest quality balsa Just join wing panels stab add vertical fin Install retracts engine radio mounts cover paint youre ready complete Total weight 81h 8 3/4 lbs Revenge can sweet Revenger. pattern design can win See nearest hobby shop first 4 full line brochure write MODEL MERCHANT 554 E Fronton St. Brownaville TX 73520 no suggested changes current rule agreed upon majority favored rather loose interpretation rule new stands Specific proposals published Com petition Newsletter section October November December 1980 Review submit comments may have NCAC CLCB either directly representatives through AMA HQ Ed note process speeded up Wyou send directly AMA district CLCB member RBM N U U f7EiT7J Strips Balsa Fuzz-Freew/out Adjustments Small -$1000 Large shown-$2000 Please add $100 postage P Kits ature Renlicas EE BEE $600 please ad Si 00 postage Catalog 75 GENE DUBOIS P0 Box c Acuslinet MA 02743 ....DEALER INQUIRIES INVITED 4 Fine Quality Flying Models 98 RUBBER POWER KITS plus Gliders CIL R/C Accessories Books Catalog $150 MAJESTIC MODELS 3273 West 129th Street Cleveland Ohio 44111 adjustment per flight go slowly Sensitivity adjustments increases speed Increase DT time fine-tune glide until satisfied Sea Power contribution state art Free Flight hope enjoy introduction programmable tail feathers FF Duration/Meuser Continued page 53 hungry According Bat Sheet Strat-O-Bats Wash ington Steve Helmick editor Ken Bauer pro ducing electronic timers Nordic Towline Gliders perhaps multi-function timer Power models will come later havent chance check information Ken get photos drawings Helmicks comments Bauers timer look like way go all-weatherA-2 calm-air zoom delay desirable glider does work Basically theres steel plate fastened DT line stuck onto electro-magnet made coil relay Some electronic wizardry IC chip times current flow coil shuts down DT-time comes row tiny rocker switches sets DT time. assigned times 10 40 160 640 seconds flyoffs automatically add together r words punch 40 160 200 sec pretty windy 10 160 170 seconds etc Punch get 850 rockers have hole can slip heavy monofilament pin through lock what want lock out what dont want first rocker switch row just on/off Also micro-switch put front towhook allows timer reset return straight tow go circle tow timer starts means circle less 10-sec setting timer starts model goes CT mode neat thing about drop towline line breaks timer starts model comes down battery goes dead model DTs less chance setting DT too short because no grooves count Seelig timer will speed up weather gets hotter Seeligs lost about 20-30 seconds afternoon heat Taft Ken recommends 9v transistor radio battery power weight about 1 oz battery timer itself quite small light nose pod will probably have specially tailored Bauer timer Oh yes . $25 please interested write Ken Bauer 627 E Monroe Orange CA 92667 Now Tatone no longer imports timers bit problem Seelig timers available expensive Some English companies having timers made Hong Kong dont know available US Some modelers Northwest using Tomy windup toy motors engine cutoff Id like supply details dont have running time too short DT actuation According Aero Modeller magazine some English Free Flighters extending running time two minutes adding inertia escapement heat tip glass-head pin push plastic escapement andprestotwo minutes still doesnt solve problem Category II flying Perhaps abandon clockspring use rubberband-string-and pulley system K-Mart timers still available preferred modelers over Tatone type engine timers have manufacture own faceplate release mechanism See AA Lidbergs article 122 Model Aviation Yes rush copy new 6th edition Radio Control Buyers Guide Please check ElEnclosed $1100 $995 retail plus $105 postage US Canada Only dians send US Funds El Charge El Mastercharge LI Visa City State Zip Return R/C Buyers GuIde 7 Clifton House Clifton VA 22024 5- 34][b739232701319810]] NO NONSENSE BALSA STRIPPERS N
Edition: Model Aviation - 1981/02
Page Numbers: 48, 49, 50, 121, 122
S IF THE Free Flight Community become organized employ outside study group evaluate report State-of the-AA Free Flight would likely surprise Such group would probably report no state-of-the-art rather giant spectrum spanning 45-year period less narrowthe field abit eliminate Old-Timer activity concentrate study competitive Power flying would still find incredible variety equipment use thing docile Dusters automated futur istic Bombs grace flying fields wait Isnt what makes Free Flight great fact well-trimmed model put right alr consistently can finish winners circle what keeps us coming back Free Flight has changed will continue promise change provides challenge keeps fliers interested Shrinking flying sites have brought about changes new rules written Category 111 now III Since performance name game Free Flight new design concepts developed match evershortening engine runs Smaller faster models powerful engines have emerged large slow-climbing floaters have given way higher climbing designs depend altitude good alr attain maxes design parameters have created own special problems typical Free Flight model today compromise maintain suitable giide re quires sufficient angular differences between wing stabilizer longitudinal dihedral creates problem during high-speed power portion flight model tends climb up arc allowed continue would result disastrous loop condition typically controlled inducing turn usually transforms loop spiral climb turn also helps alleviate potential stall end engine run providing smooth transition power glide As powerful engines installed smaller smaller alrframes condition becomes difficult impossible control British have dealt small-field condi tions years have experienced same problems successful approach challenge demonstrated classic Dixielander 350 sq design Class small B engines utilizes huge stabilizer operates center-of-gravity CG inch behind wing tralling edge ship has very high pylon employs no downthrust Such force layout enables control high power quite well still has its limitations Another approach variable incidence tailplane VIT commonly referred combined auto rudder AR system standard equipment typical FAI Power ship allows separate stabilizer rudder set tings power giide porti6ns flight means course gadgetry multifunc tion timerand potential malfunction Proper installation careful malntenance pre-flight checks will minimize hazard VIT-AR system actually alters Free Flight concept somewhat allows pre-programmed flight 48 Model Aviation first glance would appear complicated fly VIT-AR models equipped actually easier trim have better chance surviving crucial first flights brings us subject hand Sea Power use 29 engine call Bee Power designed VIT trainer wanted model would perform spectacularly same time allow gain experience programmable tail feathers model tell should eventually become involved FAI Power class Sea Power has opened new horizons Free Flight power typifies state art indeed exists Sea Power trainer definitely beginners model Due will offering glue-stick-A-to-former-B construc tion sequences Rather will mention few particular points spend remainder space trimming flying techniques will note abundance wood wing stabilizer structures Weight vital factor Free Flight construction expense structural strength model really moves out under power added structure essential prevent flutter high speeds withstand dethermalizer DT loads end engine run testing Similarly plastic covering mater ials recommended GM-grade silkapan wings 00-grade stabilizer provide necessary rigidity pylon laminated resistance flexing has hardwood insert attaching aluminum wing mount have trouble locating round aluminum stock wing mount anchor nuts saw couple lengths off small X-Acto knife handle aluminum rest quarter-circle plywood wing-key system works great twin landing-skid system useful model sitting ground preparation pre-flight servicing helps avoid punctures covering upon landing de thermalizing Two nose styles shown plan faired-in wood engine mount system used original durable attractive lot extra work alternate commercial mount bolted firewall much simpler does create drag Most us used fabricating built-up profile fuselages Sea Power uses built-up box Start bottom sheet cut size lower stringers attached Pin building board Cut Out sides install upper stringers Glue sides bottom install formers pylon Add top sheeting Most Class C strong Class B engine can used fly ship C good Fox 36X Combat engine 10-4 prop Class B events special 29 piston sleeve fitted Fox 36X case crankshaft tuned turn 10-4 prop same rpm 36 several good VIT-AR systems use today explain would beyond scope construction article have some advantages disadvantages system used Sea Power typical could altered suit individual tastes affecting performance Basically what needed devices retain stabilizer low incidence angle climb means increase angle glide finally provisions dethermalizing Auto-rudders merely provide two adjustable settings climb glide stabilizer Sea Power held down trailing edge against plywood incidence shim aluminum arm mounted left side fin leading edge nylon line routed through aluminum tube guides timer arm used control stabilizer incidence line released stabilizer rises rubberband February 1981 49 Three-quarter rearview emphasizes long tail moment arm allows minimal ares stabilizer providing precise model control Rear fuselage has no formers allowing free passage lines operate VIT-AR Authors model set up right-handed fliers Engine exhaust left helps keep timer mechanism free oil Left-handed fliers will want reverse system Make special effort keep timer clean workina DroDerlvmalfunction disaster Twin skids help prevent damage model ison ground Wing rest madefrom aluminum sheet quarter-circle plywood keys maintain wing alignment Seelig multi-function timer controls engine run stab incidence rudder settingsfor power glide well dethermalizing Rubber band tension critical too little allows unwanted control movement too much causes timer malfunction pre-flight check systems absolutely essentiala good habit case tension until contacts glide arm mounted right side fin arm has precise adjustment form stop-screw lock nut glide arm retained line dethermalizer arm timer line released stabilizer pops up DT position DT angle limited line passing through aluminum tube fuselage auto-rudder simply held against climb stop against rubberband tension line timer line released rubber tension pulls rudder over against glide stop same timer controls flight pattern used shut down engine end power run accomplished use flood-off valve dumps fuel under pressure engines intake accomplish requires timer capable four separate functions first flew Sea Power homemade timer fabricated K-Mart camera timer timer allowed fhree functions englne flood-off auto stab auto rudder Dethermalizing accomplished fuse Because stubby output shaft timer functions controlled single disk feature eliminated possibility easily varying timing various functions negating desirable features VIT-AR system highly recommend invest Seelig timer venture programmable Free Flight Its cost will repaid ease trimming during potentially risky initial flights Prior going flying field several final checks order Check center-of-gravity indicated plans add ballast necessary achieve proper balance Check timer ensure arms riding bottoms grooves wire arms have known jump out grooves under tension rudder arm instant launch can imagine what ship would under powerwith rudder glide position think get picture Also sure notches timer disk deep enough allow release timer arms proper time file deeper learn both lessons hard way during later initiation FM Power Assemble model same number rubberbands will use flying Check LIZEIIiIL TRIM FOR CENTER PLANKING I1/1K PLY WING KEYS LEADING LOGE /2 SO U_ LLrnII~II_ -PIfiiII 0 T/WD3/N SPAN IND N P1 SINLISRAL sALL CENTER PANEL AWE N I/NOSAK - it 4 I/5K S/4 3/DO WEE11KG5/32 WIN 00 I/G 0 TRAILING EDGE S/IN DOWEL WING KEYS ALTERNATE ROSE DETAIL ONE KONG SO TORDOT OFFSET MN LEADING LOGE I/O _____If jj ~K MAIN RING 0-40 FLAT ALSO SCREWS 3/N C I/O MAPLEALUM ARID MOKINTI/O SD STRINGERS vx I::-M 00 S/SD SREET TO U L LAMINATES PYLON IWIM STRINGERS TO ISIANALE 78 OFIMOERSALT SLOOCAI/O CORE S/3D FACESDOCTOR THIS POINT AFT S/RI OGRIEL IGRAIN DIRECTION 1/4 01/2 HARDWOOD FGEL TANKSAN ALOM NAGSLIDE-DT ARM LINE FLOOD GPFDRILL N TAP 4-GOLEFT RIGHTPOWER ARM LIRE VALVENODDER LINE COOL 7 CII-ii- Yi~3/32ALSM TONE I, 0II II III F-IF2 4 DOLTH F-S SOFT MOCKUA sure wing stab adequately secure keeping mind fast model VIT AR arm lines terminate loops Rubberbands tied loops complete hookup timer arms sure rubberband tension enough resist flight loads Stabilizer trailing edges tend rise under power sure enough tension used same tension will affect seating timer arms grooves Check check double check Operate timer control functions times sure everything order before going field first step field determine approx imate control settings glide Hook glide arm line timer power arm rudder line should connected As starting point adjust glide arm screw allow stab trailing edge 3/16-in -in above fuselage rudder have approximately F-SF-KPYLON LOTENDS TO NOTTON o-in right offset Test-glide model make appropriate adjustments obtain glide settings roughly correct basic setting lower stabilizer trailing edge about 3/32- -in initial power setting Place shims under stab provide seat power arm hold stabilizer against Set rudder amidship straight initial test flight Hook up control functions start englne check proper flood-off timer opera tion Flood-off must positive engine does stop instantly may fly through timer functions resultant control surface changes gives disastrous results engine does stop instantly may need drill out flood-off fitting allow fuel flow dont drill out large fitting weakened becomes problem use Continued page 121 50 Model Aviation Close-up floodoff system Line timer t cable Wire arm flood valve acts spring tension line Looped line filling tank Better system fuel through engine feed flood lines Goes best 10-4 prop Speartish designed Leroy Cordes fit planform moments Harry Higleys MoHo models averaging around 350 sq wing area maximum 380 very few 300 sq minimum Profile-class models also seem getting heavier maximum 48 oz lightest Guardian Les Pardue weighed 28 oz TWA engine average seemed 34 35 oz Supertigre engines three four ounces heavier specialty engines top seven airplanes averaged just under 38 oz average entries little over 35 oz Navy Carrier Society dinner following Nats competition discussion rules 25 Carrier fliers opinions expressed rather different obtained year ago important decisions reached either unanimous very close Everyone seems resolved inevitability specialty engines concerned about rising cost powerplants limited availability reversal last years survey fliers voted recommend change ball-bearing engines 1982 keeping other engine restrictions change proposal has submitted AMA would combine Class Class II adopt equivalent Class Profile event no engine restrictions set up Junior Senior Profile event no auxiliary surfaces sliders etc stock plain bearing engines CL-82-7 group unanimously opposed such change consensus such radical changes may acceptable local basis national implementation would disastrous Profile bonus points discussed length RichardL Perry 416 Woodhill Drive Golds boro NC 27530 Sea Power/Haught Continued page 50 larger #6 fitting Take note thread failure flood-off fitting will allow engine run until fuel exhausted Repeat engine cut off test several times observe effects engine vibration timer functions well ready flight first flight will have engine run no less two nor three seconds Set power arm stabilizer timer disk -to 1sec delay after engine cut Hook power arm timer hook glide ann anything Set rudder disk 3-sec delay afterstabilizerreleases Hook up rudder timer arm setup will provide instant DT after engine cut giide arm held place Test-run timer ensure adjustments correct Hook up lines again make visual inspection hookups control positions Make rigid rule prior flight Ensure timer fully wound Start engine launch 60- 70-degree angiejust right wind Note climb angie andturn tendency Model should maintain launch angie show slight tendency turn right Observe DT rate descent Correct climb angle adjusting height stab shims Increase height steepen climb vice versa Adjust rudder needed DT too fast lower DT angle slightly Continue 3-sec tests until satisfied climb angle turn tendency satisfied power pattern will safe readjust timer power arm disk stabilizer 3-sec delay after engine cut reduce wing strain speed builds up succes sive flights longer engine run Increase engine run second fly model again Continue observe power pattern engine run increased 1-sec intervals hurry process Make adjustment time keep small attempt transist glide until have attained 7-sec power run may increase delay DT appears putting heavy load wings point should getting good steep climb around 65-70 degrees about three-quarters turn right now ready work transition Adjust DT disk 15 seconds hook up glide arm line DT arm well other lines respective places Watch model closely engine cuts Model should transist smoothly Poor transitions often due improper rudder trimming rudder brought tripped too early will cause right wing go down due kicking tail right results diving turn after engine cut Bad news Late rudder often results stalling Tripping stabilizer too soon results upward pitching stall Releasing stabilizer too late allows model dive Hopefully can get glimpse glide before DT. Remember REVENGER 60-Size Pattern Designed Revenge can sweet new Revenger pattern design can win 65-inch span laminar-flow wing 700 square-inch area helps perform AMA-FAI man euvers new kind smooth ness can read about May 1978 RC Modeler Revenger comes highly prefabricated balsa fuselage assembled sanded Foam wing panels stabilizer presheeted sanded vertical fin Dick Russ rudder presanded shape contest quality balsa Just join wing panels stab add vertical fin Install retracts engine radio mounts cover paint youre ready complete Total weight 81h 8 3/4 lbs Revenge can sweet Revenger. pattern design can win See nearest hobby shop first 4 full line brochure write MODEL MERCHANT 554 E Fronton St. Brownaville TX 73520 no suggested changes current rule agreed upon majority favored rather loose interpretation rule new stands Specific proposals published Com petition Newsletter section October November December 1980 Review submit comments may have NCAC CLCB either directly representatives through AMA HQ Ed note process speeded up Wyou send directly AMA district CLCB member RBM N U U f7EiT7J Strips Balsa Fuzz-Freew/out Adjustments Small -$1000 Large shown-$2000 Please add $100 postage P Kits ature Renlicas EE BEE $600 please ad Si 00 postage Catalog 75 GENE DUBOIS P0 Box c Acuslinet MA 02743 ....DEALER INQUIRIES INVITED 4 Fine Quality Flying Models 98 RUBBER POWER KITS plus Gliders CIL R/C Accessories Books Catalog $150 MAJESTIC MODELS 3273 West 129th Street Cleveland Ohio 44111 adjustment per flight go slowly Sensitivity adjustments increases speed Increase DT time fine-tune glide until satisfied Sea Power contribution state art Free Flight hope enjoy introduction programmable tail feathers FF Duration/Meuser Continued page 53 hungry According Bat Sheet Strat-O-Bats Wash ington Steve Helmick editor Ken Bauer pro ducing electronic timers Nordic Towline Gliders perhaps multi-function timer Power models will come later havent chance check information Ken get photos drawings Helmicks comments Bauers timer look like way go all-weatherA-2 calm-air zoom delay desirable glider does work Basically theres steel plate fastened DT line stuck onto electro-magnet made coil relay Some electronic wizardry IC chip times current flow coil shuts down DT-time comes row tiny rocker switches sets DT time. assigned times 10 40 160 640 seconds flyoffs automatically add together r words punch 40 160 200 sec pretty windy 10 160 170 seconds etc Punch get 850 rockers have hole can slip heavy monofilament pin through lock what want lock out what dont want first rocker switch row just on/off Also micro-switch put front towhook allows timer reset return straight tow go circle tow timer starts means circle less 10-sec setting timer starts model goes CT mode neat thing about drop towline line breaks timer starts model comes down battery goes dead model DTs less chance setting DT too short because no grooves count Seelig timer will speed up weather gets hotter Seeligs lost about 20-30 seconds afternoon heat Taft Ken recommends 9v transistor radio battery power weight about 1 oz battery timer itself quite small light nose pod will probably have specially tailored Bauer timer Oh yes . $25 please interested write Ken Bauer 627 E Monroe Orange CA 92667 Now Tatone no longer imports timers bit problem Seelig timers available expensive Some English companies having timers made Hong Kong dont know available US Some modelers Northwest using Tomy windup toy motors engine cutoff Id like supply details dont have running time too short DT actuation According Aero Modeller magazine some English Free Flighters extending running time two minutes adding inertia escapement heat tip glass-head pin push plastic escapement andprestotwo minutes still doesnt solve problem Category II flying Perhaps abandon clockspring use rubberband-string-and pulley system K-Mart timers still available preferred modelers over Tatone type engine timers have manufacture own faceplate release mechanism See AA Lidbergs article 122 Model Aviation Yes rush copy new 6th edition Radio Control Buyers Guide Please check ElEnclosed $1100 $995 retail plus $105 postage US Canada Only dians send US Funds El Charge El Mastercharge LI Visa City State Zip Return R/C Buyers GuIde 7 Clifton House Clifton VA 22024 5- 34][b739232701319810]] NO NONSENSE BALSA STRIPPERS N
Edition: Model Aviation - 1981/02
Page Numbers: 48, 49, 50, 121, 122
S IF THE Free Flight Community become organized employ outside study group evaluate report State-of the-AA Free Flight would likely surprise Such group would probably report no state-of-the-art rather giant spectrum spanning 45-year period less narrowthe field abit eliminate Old-Timer activity concentrate study competitive Power flying would still find incredible variety equipment use thing docile Dusters automated futur istic Bombs grace flying fields wait Isnt what makes Free Flight great fact well-trimmed model put right alr consistently can finish winners circle what keeps us coming back Free Flight has changed will continue promise change provides challenge keeps fliers interested Shrinking flying sites have brought about changes new rules written Category 111 now III Since performance name game Free Flight new design concepts developed match evershortening engine runs Smaller faster models powerful engines have emerged large slow-climbing floaters have given way higher climbing designs depend altitude good alr attain maxes design parameters have created own special problems typical Free Flight model today compromise maintain suitable giide re quires sufficient angular differences between wing stabilizer longitudinal dihedral creates problem during high-speed power portion flight model tends climb up arc allowed continue would result disastrous loop condition typically controlled inducing turn usually transforms loop spiral climb turn also helps alleviate potential stall end engine run providing smooth transition power glide As powerful engines installed smaller smaller alrframes condition becomes difficult impossible control British have dealt small-field condi tions years have experienced same problems successful approach challenge demonstrated classic Dixielander 350 sq design Class small B engines utilizes huge stabilizer operates center-of-gravity CG inch behind wing tralling edge ship has very high pylon employs no downthrust Such force layout enables control high power quite well still has its limitations Another approach variable incidence tailplane VIT commonly referred combined auto rudder AR system standard equipment typical FAI Power ship allows separate stabilizer rudder set tings power giide porti6ns flight means course gadgetry multifunc tion timerand potential malfunction Proper installation careful malntenance pre-flight checks will minimize hazard VIT-AR system actually alters Free Flight concept somewhat allows pre-programmed flight 48 Model Aviation first glance would appear complicated fly VIT-AR models equipped actually easier trim have better chance surviving crucial first flights brings us subject hand Sea Power use 29 engine call Bee Power designed VIT trainer wanted model would perform spectacularly same time allow gain experience programmable tail feathers model tell should eventually become involved FAI Power class Sea Power has opened new horizons Free Flight power typifies state art indeed exists Sea Power trainer definitely beginners model Due will offering glue-stick-A-to-former-B construc tion sequences Rather will mention few particular points spend remainder space trimming flying techniques will note abundance wood wing stabilizer structures Weight vital factor Free Flight construction expense structural strength model really moves out under power added structure essential prevent flutter high speeds withstand dethermalizer DT loads end engine run testing Similarly plastic covering mater ials recommended GM-grade silkapan wings 00-grade stabilizer provide necessary rigidity pylon laminated resistance flexing has hardwood insert attaching aluminum wing mount have trouble locating round aluminum stock wing mount anchor nuts saw couple lengths off small X-Acto knife handle aluminum rest quarter-circle plywood wing-key system works great twin landing-skid system useful model sitting ground preparation pre-flight servicing helps avoid punctures covering upon landing de thermalizing Two nose styles shown plan faired-in wood engine mount system used original durable attractive lot extra work alternate commercial mount bolted firewall much simpler does create drag Most us used fabricating built-up profile fuselages Sea Power uses built-up box Start bottom sheet cut size lower stringers attached Pin building board Cut Out sides install upper stringers Glue sides bottom install formers pylon Add top sheeting Most Class C strong Class B engine can used fly ship C good Fox 36X Combat engine 10-4 prop Class B events special 29 piston sleeve fitted Fox 36X case crankshaft tuned turn 10-4 prop same rpm 36 several good VIT-AR systems use today explain would beyond scope construction article have some advantages disadvantages system used Sea Power typical could altered suit individual tastes affecting performance Basically what needed devices retain stabilizer low incidence angle climb means increase angle glide finally provisions dethermalizing Auto-rudders merely provide two adjustable settings climb glide stabilizer Sea Power held down trailing edge against plywood incidence shim aluminum arm mounted left side fin leading edge nylon line routed through aluminum tube guides timer arm used control stabilizer incidence line released stabilizer rises rubberband February 1981 49 Three-quarter rearview emphasizes long tail moment arm allows minimal ares stabilizer providing precise model control Rear fuselage has no formers allowing free passage lines operate VIT-AR Authors model set up right-handed fliers Engine exhaust left helps keep timer mechanism free oil Left-handed fliers will want reverse system Make special effort keep timer clean workina DroDerlvmalfunction disaster Twin skids help prevent damage model ison ground Wing rest madefrom aluminum sheet quarter-circle plywood keys maintain wing alignment Seelig multi-function timer controls engine run stab incidence rudder settingsfor power glide well dethermalizing Rubber band tension critical too little allows unwanted control movement too much causes timer malfunction pre-flight check systems absolutely essentiala good habit case tension until contacts glide arm mounted right side fin arm has precise adjustment form stop-screw lock nut glide arm retained line dethermalizer arm timer line released stabilizer pops up DT position DT angle limited line passing through aluminum tube fuselage auto-rudder simply held against climb stop against rubberband tension line timer line released rubber tension pulls rudder over against glide stop same timer controls flight pattern used shut down engine end power run accomplished use flood-off valve dumps fuel under pressure engines intake accomplish requires timer capable four separate functions first flew Sea Power homemade timer fabricated K-Mart camera timer timer allowed fhree functions englne flood-off auto stab auto rudder Dethermalizing accomplished fuse Because stubby output shaft timer functions controlled single disk feature eliminated possibility easily varying timing various functions negating desirable features VIT-AR system highly recommend invest Seelig timer venture programmable Free Flight Its cost will repaid ease trimming during potentially risky initial flights Prior going flying field several final checks order Check center-of-gravity indicated plans add ballast necessary achieve proper balance Check timer ensure arms riding bottoms grooves wire arms have known jump out grooves under tension rudder arm instant launch can imagine what ship would under powerwith rudder glide position think get picture Also sure notches timer disk deep enough allow release timer arms proper time file deeper learn both lessons hard way during later initiation FM Power Assemble model same number rubberbands will use flying Check LIZEIIiIL TRIM FOR CENTER PLANKING I1/1K PLY WING KEYS LEADING LOGE /2 SO U_ LLrnII~II_ -PIfiiII 0 T/WD3/N SPAN IND N P1 SINLISRAL sALL CENTER PANEL AWE N I/NOSAK - it 4 I/5K S/4 3/DO WEE11KG5/32 WIN 00 I/G 0 TRAILING EDGE S/IN DOWEL WING KEYS ALTERNATE ROSE DETAIL ONE KONG SO TORDOT OFFSET MN LEADING LOGE I/O _____If jj ~K MAIN RING 0-40 FLAT ALSO SCREWS 3/N C I/O MAPLEALUM ARID MOKINTI/O SD STRINGERS vx I::-M 00 S/SD SREET TO U L LAMINATES PYLON IWIM STRINGERS TO ISIANALE 78 OFIMOERSALT SLOOCAI/O CORE S/3D FACESDOCTOR THIS POINT AFT S/RI OGRIEL IGRAIN DIRECTION 1/4 01/2 HARDWOOD FGEL TANKSAN ALOM NAGSLIDE-DT ARM LINE FLOOD GPFDRILL N TAP 4-GOLEFT RIGHTPOWER ARM LIRE VALVENODDER LINE COOL 7 CII-ii- Yi~3/32ALSM TONE I, 0II II III F-IF2 4 DOLTH F-S SOFT MOCKUA sure wing stab adequately secure keeping mind fast model VIT AR arm lines terminate loops Rubberbands tied loops complete hookup timer arms sure rubberband tension enough resist flight loads Stabilizer trailing edges tend rise under power sure enough tension used same tension will affect seating timer arms grooves Check check double check Operate timer control functions times sure everything order before going field first step field determine approx imate control settings glide Hook glide arm line timer power arm rudder line should connected As starting point adjust glide arm screw allow stab trailing edge 3/16-in -in above fuselage rudder have approximately F-SF-KPYLON LOTENDS TO NOTTON o-in right offset Test-glide model make appropriate adjustments obtain glide settings roughly correct basic setting lower stabilizer trailing edge about 3/32- -in initial power setting Place shims under stab provide seat power arm hold stabilizer against Set rudder amidship straight initial test flight Hook up control functions start englne check proper flood-off timer opera tion Flood-off must positive engine does stop instantly may fly through timer functions resultant control surface changes gives disastrous results engine does stop instantly may need drill out flood-off fitting allow fuel flow dont drill out large fitting weakened becomes problem use Continued page 121 50 Model Aviation Close-up floodoff system Line timer t cable Wire arm flood valve acts spring tension line Looped line filling tank Better system fuel through engine feed flood lines Goes best 10-4 prop Speartish designed Leroy Cordes fit planform moments Harry Higleys MoHo models averaging around 350 sq wing area maximum 380 very few 300 sq minimum Profile-class models also seem getting heavier maximum 48 oz lightest Guardian Les Pardue weighed 28 oz TWA engine average seemed 34 35 oz Supertigre engines three four ounces heavier specialty engines top seven airplanes averaged just under 38 oz average entries little over 35 oz Navy Carrier Society dinner following Nats competition discussion rules 25 Carrier fliers opinions expressed rather different obtained year ago important decisions reached either unanimous very close Everyone seems resolved inevitability specialty engines concerned about rising cost powerplants limited availability reversal last years survey fliers voted recommend change ball-bearing engines 1982 keeping other engine restrictions change proposal has submitted AMA would combine Class Class II adopt equivalent Class Profile event no engine restrictions set up Junior Senior Profile event no auxiliary surfaces sliders etc stock plain bearing engines CL-82-7 group unanimously opposed such change consensus such radical changes may acceptable local basis national implementation would disastrous Profile bonus points discussed length RichardL Perry 416 Woodhill Drive Golds boro NC 27530 Sea Power/Haught Continued page 50 larger #6 fitting Take note thread failure flood-off fitting will allow engine run until fuel exhausted Repeat engine cut off test several times observe effects engine vibration timer functions well ready flight first flight will have engine run no less two nor three seconds Set power arm stabilizer timer disk -to 1sec delay after engine cut Hook power arm timer hook glide ann anything Set rudder disk 3-sec delay afterstabilizerreleases Hook up rudder timer arm setup will provide instant DT after engine cut giide arm held place Test-run timer ensure adjustments correct Hook up lines again make visual inspection hookups control positions Make rigid rule prior flight Ensure timer fully wound Start engine launch 60- 70-degree angiejust right wind Note climb angie andturn tendency Model should maintain launch angie show slight tendency turn right Observe DT rate descent Correct climb angle adjusting height stab shims Increase height steepen climb vice versa Adjust rudder needed DT too fast lower DT angle slightly Continue 3-sec tests until satisfied climb angle turn tendency satisfied power pattern will safe readjust timer power arm disk stabilizer 3-sec delay after engine cut reduce wing strain speed builds up succes sive flights longer engine run Increase engine run second fly model again Continue observe power pattern engine run increased 1-sec intervals hurry process Make adjustment time keep small attempt transist glide until have attained 7-sec power run may increase delay DT appears putting heavy load wings point should getting good steep climb around 65-70 degrees about three-quarters turn right now ready work transition Adjust DT disk 15 seconds hook up glide arm line DT arm well other lines respective places Watch model closely engine cuts Model should transist smoothly Poor transitions often due improper rudder trimming rudder brought tripped too early will cause right wing go down due kicking tail right results diving turn after engine cut Bad news Late rudder often results stalling Tripping stabilizer too soon results upward pitching stall Releasing stabilizer too late allows model dive Hopefully can get glimpse glide before DT. Remember REVENGER 60-Size Pattern Designed Revenge can sweet new Revenger pattern design can win 65-inch span laminar-flow wing 700 square-inch area helps perform AMA-FAI man euvers new kind smooth ness can read about May 1978 RC Modeler Revenger comes highly prefabricated balsa fuselage assembled sanded Foam wing panels stabilizer presheeted sanded vertical fin Dick Russ rudder presanded shape contest quality balsa Just join wing panels stab add vertical fin Install retracts engine radio mounts cover paint youre ready complete Total weight 81h 8 3/4 lbs Revenge can sweet Revenger. pattern design can win See nearest hobby shop first 4 full line brochure write MODEL MERCHANT 554 E Fronton St. Brownaville TX 73520 no suggested changes current rule agreed upon majority favored rather loose interpretation rule new stands Specific proposals published Com petition Newsletter section October November December 1980 Review submit comments may have NCAC CLCB either directly representatives through AMA HQ Ed note process speeded up Wyou send directly AMA district CLCB member RBM N U U f7EiT7J Strips Balsa Fuzz-Freew/out Adjustments Small -$1000 Large shown-$2000 Please add $100 postage P Kits ature Renlicas EE BEE $600 please ad Si 00 postage Catalog 75 GENE DUBOIS P0 Box c Acuslinet MA 02743 ....DEALER INQUIRIES INVITED 4 Fine Quality Flying Models 98 RUBBER POWER KITS plus Gliders CIL R/C Accessories Books Catalog $150 MAJESTIC MODELS 3273 West 129th Street Cleveland Ohio 44111 adjustment per flight go slowly Sensitivity adjustments increases speed Increase DT time fine-tune glide until satisfied Sea Power contribution state art Free Flight hope enjoy introduction programmable tail feathers FF Duration/Meuser Continued page 53 hungry According Bat Sheet Strat-O-Bats Wash ington Steve Helmick editor Ken Bauer pro ducing electronic timers Nordic Towline Gliders perhaps multi-function timer Power models will come later havent chance check information Ken get photos drawings Helmicks comments Bauers timer look like way go all-weatherA-2 calm-air zoom delay desirable glider does work Basically theres steel plate fastened DT line stuck onto electro-magnet made coil relay Some electronic wizardry IC chip times current flow coil shuts down DT-time comes row tiny rocker switches sets DT time. assigned times 10 40 160 640 seconds flyoffs automatically add together r words punch 40 160 200 sec pretty windy 10 160 170 seconds etc Punch get 850 rockers have hole can slip heavy monofilament pin through lock what want lock out what dont want first rocker switch row just on/off Also micro-switch put front towhook allows timer reset return straight tow go circle tow timer starts means circle less 10-sec setting timer starts model goes CT mode neat thing about drop towline line breaks timer starts model comes down battery goes dead model DTs less chance setting DT too short because no grooves count Seelig timer will speed up weather gets hotter Seeligs lost about 20-30 seconds afternoon heat Taft Ken recommends 9v transistor radio battery power weight about 1 oz battery timer itself quite small light nose pod will probably have specially tailored Bauer timer Oh yes . $25 please interested write Ken Bauer 627 E Monroe Orange CA 92667 Now Tatone no longer imports timers bit problem Seelig timers available expensive Some English companies having timers made Hong Kong dont know available US Some modelers Northwest using Tomy windup toy motors engine cutoff Id like supply details dont have running time too short DT actuation According Aero Modeller magazine some English Free Flighters extending running time two minutes adding inertia escapement heat tip glass-head pin push plastic escapement andprestotwo minutes still doesnt solve problem Category II flying Perhaps abandon clockspring use rubberband-string-and pulley system K-Mart timers still available preferred modelers over Tatone type engine timers have manufacture own faceplate release mechanism See AA Lidbergs article 122 Model Aviation Yes rush copy new 6th edition Radio Control Buyers Guide Please check ElEnclosed $1100 $995 retail plus $105 postage US Canada Only dians send US Funds El Charge El Mastercharge LI Visa City State Zip Return R/C Buyers GuIde 7 Clifton House Clifton VA 22024 5- 34][b739232701319810]] NO NONSENSE BALSA STRIPPERS N
Edition: Model Aviation - 1981/02
Page Numbers: 48, 49, 50, 121, 122
S IF THE Free Flight Community become organized employ outside study group evaluate report State-of the-AA Free Flight would likely surprise Such group would probably report no state-of-the-art rather giant spectrum spanning 45-year period less narrowthe field abit eliminate Old-Timer activity concentrate study competitive Power flying would still find incredible variety equipment use thing docile Dusters automated futur istic Bombs grace flying fields wait Isnt what makes Free Flight great fact well-trimmed model put right alr consistently can finish winners circle what keeps us coming back Free Flight has changed will continue promise change provides challenge keeps fliers interested Shrinking flying sites have brought about changes new rules written Category 111 now III Since performance name game Free Flight new design concepts developed match evershortening engine runs Smaller faster models powerful engines have emerged large slow-climbing floaters have given way higher climbing designs depend altitude good alr attain maxes design parameters have created own special problems typical Free Flight model today compromise maintain suitable giide re quires sufficient angular differences between wing stabilizer longitudinal dihedral creates problem during high-speed power portion flight model tends climb up arc allowed continue would result disastrous loop condition typically controlled inducing turn usually transforms loop spiral climb turn also helps alleviate potential stall end engine run providing smooth transition power glide As powerful engines installed smaller smaller alrframes condition becomes difficult impossible control British have dealt small-field condi tions years have experienced same problems successful approach challenge demonstrated classic Dixielander 350 sq design Class small B engines utilizes huge stabilizer operates center-of-gravity CG inch behind wing tralling edge ship has very high pylon employs no downthrust Such force layout enables control high power quite well still has its limitations Another approach variable incidence tailplane VIT commonly referred combined auto rudder AR system standard equipment typical FAI Power ship allows separate stabilizer rudder set tings power giide porti6ns flight means course gadgetry multifunc tion timerand potential malfunction Proper installation careful malntenance pre-flight checks will minimize hazard VIT-AR system actually alters Free Flight concept somewhat allows pre-programmed flight 48 Model Aviation first glance would appear complicated fly VIT-AR models equipped actually easier trim have better chance surviving crucial first flights brings us subject hand Sea Power use 29 engine call Bee Power designed VIT trainer wanted model would perform spectacularly same time allow gain experience programmable tail feathers model tell should eventually become involved FAI Power class Sea Power has opened new horizons Free Flight power typifies state art indeed exists Sea Power trainer definitely beginners model Due will offering glue-stick-A-to-former-B construc tion sequences Rather will mention few particular points spend remainder space trimming flying techniques will note abundance wood wing stabilizer structures Weight vital factor Free Flight construction expense structural strength model really moves out under power added structure essential prevent flutter high speeds withstand dethermalizer DT loads end engine run testing Similarly plastic covering mater ials recommended GM-grade silkapan wings 00-grade stabilizer provide necessary rigidity pylon laminated resistance flexing has hardwood insert attaching aluminum wing mount have trouble locating round aluminum stock wing mount anchor nuts saw couple lengths off small X-Acto knife handle aluminum rest quarter-circle plywood wing-key system works great twin landing-skid system useful model sitting ground preparation pre-flight servicing helps avoid punctures covering upon landing de thermalizing Two nose styles shown plan faired-in wood engine mount system used original durable attractive lot extra work alternate commercial mount bolted firewall much simpler does create drag Most us used fabricating built-up profile fuselages Sea Power uses built-up box Start bottom sheet cut size lower stringers attached Pin building board Cut Out sides install upper stringers Glue sides bottom install formers pylon Add top sheeting Most Class C strong Class B engine can used fly ship C good Fox 36X Combat engine 10-4 prop Class B events special 29 piston sleeve fitted Fox 36X case crankshaft tuned turn 10-4 prop same rpm 36 several good VIT-AR systems use today explain would beyond scope construction article have some advantages disadvantages system used Sea Power typical could altered suit individual tastes affecting performance Basically what needed devices retain stabilizer low incidence angle climb means increase angle glide finally provisions dethermalizing Auto-rudders merely provide two adjustable settings climb glide stabilizer Sea Power held down trailing edge against plywood incidence shim aluminum arm mounted left side fin leading edge nylon line routed through aluminum tube guides timer arm used control stabilizer incidence line released stabilizer rises rubberband February 1981 49 Three-quarter rearview emphasizes long tail moment arm allows minimal ares stabilizer providing precise model control Rear fuselage has no formers allowing free passage lines operate VIT-AR Authors model set up right-handed fliers Engine exhaust left helps keep timer mechanism free oil Left-handed fliers will want reverse system Make special effort keep timer clean workina DroDerlvmalfunction disaster Twin skids help prevent damage model ison ground Wing rest madefrom aluminum sheet quarter-circle plywood keys maintain wing alignment Seelig multi-function timer controls engine run stab incidence rudder settingsfor power glide well dethermalizing Rubber band tension critical too little allows unwanted control movement too much causes timer malfunction pre-flight check systems absolutely essentiala good habit case tension until contacts glide arm mounted right side fin arm has precise adjustment form stop-screw lock nut glide arm retained line dethermalizer arm timer line released stabilizer pops up DT position DT angle limited line passing through aluminum tube fuselage auto-rudder simply held against climb stop against rubberband tension line timer line released rubber tension pulls rudder over against glide stop same timer controls flight pattern used shut down engine end power run accomplished use flood-off valve dumps fuel under pressure engines intake accomplish requires timer capable four separate functions first flew Sea Power homemade timer fabricated K-Mart camera timer timer allowed fhree functions englne flood-off auto stab auto rudder Dethermalizing accomplished fuse Because stubby output shaft timer functions controlled single disk feature eliminated possibility easily varying timing various functions negating desirable features VIT-AR system highly recommend invest Seelig timer venture programmable Free Flight Its cost will repaid ease trimming during potentially risky initial flights Prior going flying field several final checks order Check center-of-gravity indicated plans add ballast necessary achieve proper balance Check timer ensure arms riding bottoms grooves wire arms have known jump out grooves under tension rudder arm instant launch can imagine what ship would under powerwith rudder glide position think get picture Also sure notches timer disk deep enough allow release timer arms proper time file deeper learn both lessons hard way during later initiation FM Power Assemble model same number rubberbands will use flying Check LIZEIIiIL TRIM FOR CENTER PLANKING I1/1K PLY WING KEYS LEADING LOGE /2 SO U_ LLrnII~II_ -PIfiiII 0 T/WD3/N SPAN IND N P1 SINLISRAL sALL CENTER PANEL AWE N I/NOSAK - it 4 I/5K S/4 3/DO WEE11KG5/32 WIN 00 I/G 0 TRAILING EDGE S/IN DOWEL WING KEYS ALTERNATE ROSE DETAIL ONE KONG SO TORDOT OFFSET MN LEADING LOGE I/O _____If jj ~K MAIN RING 0-40 FLAT ALSO SCREWS 3/N C I/O MAPLEALUM ARID MOKINTI/O SD STRINGERS vx I::-M 00 S/SD SREET TO U L LAMINATES PYLON IWIM STRINGERS TO ISIANALE 78 OFIMOERSALT SLOOCAI/O CORE S/3D FACESDOCTOR THIS POINT AFT S/RI OGRIEL IGRAIN DIRECTION 1/4 01/2 HARDWOOD FGEL TANKSAN ALOM NAGSLIDE-DT ARM LINE FLOOD GPFDRILL N TAP 4-GOLEFT RIGHTPOWER ARM LIRE VALVENODDER LINE COOL 7 CII-ii- Yi~3/32ALSM TONE I, 0II II III F-IF2 4 DOLTH F-S SOFT MOCKUA sure wing stab adequately secure keeping mind fast model VIT AR arm lines terminate loops Rubberbands tied loops complete hookup timer arms sure rubberband tension enough resist flight loads Stabilizer trailing edges tend rise under power sure enough tension used same tension will affect seating timer arms grooves Check check double check Operate timer control functions times sure everything order before going field first step field determine approx imate control settings glide Hook glide arm line timer power arm rudder line should connected As starting point adjust glide arm screw allow stab trailing edge 3/16-in -in above fuselage rudder have approximately F-SF-KPYLON LOTENDS TO NOTTON o-in right offset Test-glide model make appropriate adjustments obtain glide settings roughly correct basic setting lower stabilizer trailing edge about 3/32- -in initial power setting Place shims under stab provide seat power arm hold stabilizer against Set rudder amidship straight initial test flight Hook up control functions start englne check proper flood-off timer opera tion Flood-off must positive engine does stop instantly may fly through timer functions resultant control surface changes gives disastrous results engine does stop instantly may need drill out flood-off fitting allow fuel flow dont drill out large fitting weakened becomes problem use Continued page 121 50 Model Aviation Close-up floodoff system Line timer t cable Wire arm flood valve acts spring tension line Looped line filling tank Better system fuel through engine feed flood lines Goes best 10-4 prop Speartish designed Leroy Cordes fit planform moments Harry Higleys MoHo models averaging around 350 sq wing area maximum 380 very few 300 sq minimum Profile-class models also seem getting heavier maximum 48 oz lightest Guardian Les Pardue weighed 28 oz TWA engine average seemed 34 35 oz Supertigre engines three four ounces heavier specialty engines top seven airplanes averaged just under 38 oz average entries little over 35 oz Navy Carrier Society dinner following Nats competition discussion rules 25 Carrier fliers opinions expressed rather different obtained year ago important decisions reached either unanimous very close Everyone seems resolved inevitability specialty engines concerned about rising cost powerplants limited availability reversal last years survey fliers voted recommend change ball-bearing engines 1982 keeping other engine restrictions change proposal has submitted AMA would combine Class Class II adopt equivalent Class Profile event no engine restrictions set up Junior Senior Profile event no auxiliary surfaces sliders etc stock plain bearing engines CL-82-7 group unanimously opposed such change consensus such radical changes may acceptable local basis national implementation would disastrous Profile bonus points discussed length RichardL Perry 416 Woodhill Drive Golds boro NC 27530 Sea Power/Haught Continued page 50 larger #6 fitting Take note thread failure flood-off fitting will allow engine run until fuel exhausted Repeat engine cut off test several times observe effects engine vibration timer functions well ready flight first flight will have engine run no less two nor three seconds Set power arm stabilizer timer disk -to 1sec delay after engine cut Hook power arm timer hook glide ann anything Set rudder disk 3-sec delay afterstabilizerreleases Hook up rudder timer arm setup will provide instant DT after engine cut giide arm held place Test-run timer ensure adjustments correct Hook up lines again make visual inspection hookups control positions Make rigid rule prior flight Ensure timer fully wound Start engine launch 60- 70-degree angiejust right wind Note climb angie andturn tendency Model should maintain launch angie show slight tendency turn right Observe DT rate descent Correct climb angle adjusting height stab shims Increase height steepen climb vice versa Adjust rudder needed DT too fast lower DT angle slightly Continue 3-sec tests until satisfied climb angle turn tendency satisfied power pattern will safe readjust timer power arm disk stabilizer 3-sec delay after engine cut reduce wing strain speed builds up succes sive flights longer engine run Increase engine run second fly model again Continue observe power pattern engine run increased 1-sec intervals hurry process Make adjustment time keep small attempt transist glide until have attained 7-sec power run may increase delay DT appears putting heavy load wings point should getting good steep climb around 65-70 degrees about three-quarters turn right now ready work transition Adjust DT disk 15 seconds hook up glide arm line DT arm well other lines respective places Watch model closely engine cuts Model should transist smoothly Poor transitions often due improper rudder trimming rudder brought tripped too early will cause right wing go down due kicking tail right results diving turn after engine cut Bad news Late rudder often results stalling Tripping stabilizer too soon results upward pitching stall Releasing stabilizer too late allows model dive Hopefully can get glimpse glide before DT. Remember REVENGER 60-Size Pattern Designed Revenge can sweet new Revenger pattern design can win 65-inch span laminar-flow wing 700 square-inch area helps perform AMA-FAI man euvers new kind smooth ness can read about May 1978 RC Modeler Revenger comes highly prefabricated balsa fuselage assembled sanded Foam wing panels stabilizer presheeted sanded vertical fin Dick Russ rudder presanded shape contest quality balsa Just join wing panels stab add vertical fin Install retracts engine radio mounts cover paint youre ready complete Total weight 81h 8 3/4 lbs Revenge can sweet Revenger. pattern design can win See nearest hobby shop first 4 full line brochure write MODEL MERCHANT 554 E Fronton St. Brownaville TX 73520 no suggested changes current rule agreed upon majority favored rather loose interpretation rule new stands Specific proposals published Com petition Newsletter section October November December 1980 Review submit comments may have NCAC CLCB either directly representatives through AMA HQ Ed note process speeded up Wyou send directly AMA district CLCB member RBM N U U f7EiT7J Strips Balsa Fuzz-Freew/out Adjustments Small -$1000 Large shown-$2000 Please add $100 postage P Kits ature Renlicas EE BEE $600 please ad Si 00 postage Catalog 75 GENE DUBOIS P0 Box c Acuslinet MA 02743 ....DEALER INQUIRIES INVITED 4 Fine Quality Flying Models 98 RUBBER POWER KITS plus Gliders CIL R/C Accessories Books Catalog $150 MAJESTIC MODELS 3273 West 129th Street Cleveland Ohio 44111 adjustment per flight go slowly Sensitivity adjustments increases speed Increase DT time fine-tune glide until satisfied Sea Power contribution state art Free Flight hope enjoy introduction programmable tail feathers FF Duration/Meuser Continued page 53 hungry According Bat Sheet Strat-O-Bats Wash ington Steve Helmick editor Ken Bauer pro ducing electronic timers Nordic Towline Gliders perhaps multi-function timer Power models will come later havent chance check information Ken get photos drawings Helmicks comments Bauers timer look like way go all-weatherA-2 calm-air zoom delay desirable glider does work Basically theres steel plate fastened DT line stuck onto electro-magnet made coil relay Some electronic wizardry IC chip times current flow coil shuts down DT-time comes row tiny rocker switches sets DT time. assigned times 10 40 160 640 seconds flyoffs automatically add together r words punch 40 160 200 sec pretty windy 10 160 170 seconds etc Punch get 850 rockers have hole can slip heavy monofilament pin through lock what want lock out what dont want first rocker switch row just on/off Also micro-switch put front towhook allows timer reset return straight tow go circle tow timer starts means circle less 10-sec setting timer starts model goes CT mode neat thing about drop towline line breaks timer starts model comes down battery goes dead model DTs less chance setting DT too short because no grooves count Seelig timer will speed up weather gets hotter Seeligs lost about 20-30 seconds afternoon heat Taft Ken recommends 9v transistor radio battery power weight about 1 oz battery timer itself quite small light nose pod will probably have specially tailored Bauer timer Oh yes . $25 please interested write Ken Bauer 627 E Monroe Orange CA 92667 Now Tatone no longer imports timers bit problem Seelig timers available expensive Some English companies having timers made Hong Kong dont know available US Some modelers Northwest using Tomy windup toy motors engine cutoff Id like supply details dont have running time too short DT actuation According Aero Modeller magazine some English Free Flighters extending running time two minutes adding inertia escapement heat tip glass-head pin push plastic escapement andprestotwo minutes still doesnt solve problem Category II flying Perhaps abandon clockspring use rubberband-string-and pulley system K-Mart timers still available preferred modelers over Tatone type engine timers have manufacture own faceplate release mechanism See AA Lidbergs article 122 Model Aviation Yes rush copy new 6th edition Radio Control Buyers Guide Please check ElEnclosed $1100 $995 retail plus $105 postage US Canada Only dians send US Funds El Charge El Mastercharge LI Visa City State Zip Return R/C Buyers GuIde 7 Clifton House Clifton VA 22024 5- 34][b739232701319810]] NO NONSENSE BALSA STRIPPERS N
Edition: Model Aviation - 1981/02
Page Numbers: 48, 49, 50, 121, 122
S IF THE Free Flight Community become organized employ outside study group evaluate report State-of the-AA Free Flight would likely surprise Such group would probably report no state-of-the-art rather giant spectrum spanning 45-year period less narrowthe field abit eliminate Old-Timer activity concentrate study competitive Power flying would still find incredible variety equipment use thing docile Dusters automated futur istic Bombs grace flying fields wait Isnt what makes Free Flight great fact well-trimmed model put right alr consistently can finish winners circle what keeps us coming back Free Flight has changed will continue promise change provides challenge keeps fliers interested Shrinking flying sites have brought about changes new rules written Category 111 now III Since performance name game Free Flight new design concepts developed match evershortening engine runs Smaller faster models powerful engines have emerged large slow-climbing floaters have given way higher climbing designs depend altitude good alr attain maxes design parameters have created own special problems typical Free Flight model today compromise maintain suitable giide re quires sufficient angular differences between wing stabilizer longitudinal dihedral creates problem during high-speed power portion flight model tends climb up arc allowed continue would result disastrous loop condition typically controlled inducing turn usually transforms loop spiral climb turn also helps alleviate potential stall end engine run providing smooth transition power glide As powerful engines installed smaller smaller alrframes condition becomes difficult impossible control British have dealt small-field condi tions years have experienced same problems successful approach challenge demonstrated classic Dixielander 350 sq design Class small B engines utilizes huge stabilizer operates center-of-gravity CG inch behind wing tralling edge ship has very high pylon employs no downthrust Such force layout enables control high power quite well still has its limitations Another approach variable incidence tailplane VIT commonly referred combined auto rudder AR system standard equipment typical FAI Power ship allows separate stabilizer rudder set tings power giide porti6ns flight means course gadgetry multifunc tion timerand potential malfunction Proper installation careful malntenance pre-flight checks will minimize hazard VIT-AR system actually alters Free Flight concept somewhat allows pre-programmed flight 48 Model Aviation first glance would appear complicated fly VIT-AR models equipped actually easier trim have better chance surviving crucial first flights brings us subject hand Sea Power use 29 engine call Bee Power designed VIT trainer wanted model would perform spectacularly same time allow gain experience programmable tail feathers model tell should eventually become involved FAI Power class Sea Power has opened new horizons Free Flight power typifies state art indeed exists Sea Power trainer definitely beginners model Due will offering glue-stick-A-to-former-B construc tion sequences Rather will mention few particular points spend remainder space trimming flying techniques will note abundance wood wing stabilizer structures Weight vital factor Free Flight construction expense structural strength model really moves out under power added structure essential prevent flutter high speeds withstand dethermalizer DT loads end engine run testing Similarly plastic covering mater ials recommended GM-grade silkapan wings 00-grade stabilizer provide necessary rigidity pylon laminated resistance flexing has hardwood insert attaching aluminum wing mount have trouble locating round aluminum stock wing mount anchor nuts saw couple lengths off small X-Acto knife handle aluminum rest quarter-circle plywood wing-key system works great twin landing-skid system useful model sitting ground preparation pre-flight servicing helps avoid punctures covering upon landing de thermalizing Two nose styles shown plan faired-in wood engine mount system used original durable attractive lot extra work alternate commercial mount bolted firewall much simpler does create drag Most us used fabricating built-up profile fuselages Sea Power uses built-up box Start bottom sheet cut size lower stringers attached Pin building board Cut Out sides install upper stringers Glue sides bottom install formers pylon Add top sheeting Most Class C strong Class B engine can used fly ship C good Fox 36X Combat engine 10-4 prop Class B events special 29 piston sleeve fitted Fox 36X case crankshaft tuned turn 10-4 prop same rpm 36 several good VIT-AR systems use today explain would beyond scope construction article have some advantages disadvantages system used Sea Power typical could altered suit individual tastes affecting performance Basically what needed devices retain stabilizer low incidence angle climb means increase angle glide finally provisions dethermalizing Auto-rudders merely provide two adjustable settings climb glide stabilizer Sea Power held down trailing edge against plywood incidence shim aluminum arm mounted left side fin leading edge nylon line routed through aluminum tube guides timer arm used control stabilizer incidence line released stabilizer rises rubberband February 1981 49 Three-quarter rearview emphasizes long tail moment arm allows minimal ares stabilizer providing precise model control Rear fuselage has no formers allowing free passage lines operate VIT-AR Authors model set up right-handed fliers Engine exhaust left helps keep timer mechanism free oil Left-handed fliers will want reverse system Make special effort keep timer clean workina DroDerlvmalfunction disaster Twin skids help prevent damage model ison ground Wing rest madefrom aluminum sheet quarter-circle plywood keys maintain wing alignment Seelig multi-function timer controls engine run stab incidence rudder settingsfor power glide well dethermalizing Rubber band tension critical too little allows unwanted control movement too much causes timer malfunction pre-flight check systems absolutely essentiala good habit case tension until contacts glide arm mounted right side fin arm has precise adjustment form stop-screw lock nut glide arm retained line dethermalizer arm timer line released stabilizer pops up DT position DT angle limited line passing through aluminum tube fuselage auto-rudder simply held against climb stop against rubberband tension line timer line released rubber tension pulls rudder over against glide stop same timer controls flight pattern used shut down engine end power run accomplished use flood-off valve dumps fuel under pressure engines intake accomplish requires timer capable four separate functions first flew Sea Power homemade timer fabricated K-Mart camera timer timer allowed fhree functions englne flood-off auto stab auto rudder Dethermalizing accomplished fuse Because stubby output shaft timer functions controlled single disk feature eliminated possibility easily varying timing various functions negating desirable features VIT-AR system highly recommend invest Seelig timer venture programmable Free Flight Its cost will repaid ease trimming during potentially risky initial flights Prior going flying field several final checks order Check center-of-gravity indicated plans add ballast necessary achieve proper balance Check timer ensure arms riding bottoms grooves wire arms have known jump out grooves under tension rudder arm instant launch can imagine what ship would under powerwith rudder glide position think get picture Also sure notches timer disk deep enough allow release timer arms proper time file deeper learn both lessons hard way during later initiation FM Power Assemble model same number rubberbands will use flying Check LIZEIIiIL TRIM FOR CENTER PLANKING I1/1K PLY WING KEYS LEADING LOGE /2 SO U_ LLrnII~II_ -PIfiiII 0 T/WD3/N SPAN IND N P1 SINLISRAL sALL CENTER PANEL AWE N I/NOSAK - it 4 I/5K S/4 3/DO WEE11KG5/32 WIN 00 I/G 0 TRAILING EDGE S/IN DOWEL WING KEYS ALTERNATE ROSE DETAIL ONE KONG SO TORDOT OFFSET MN LEADING LOGE I/O _____If jj ~K MAIN RING 0-40 FLAT ALSO SCREWS 3/N C I/O MAPLEALUM ARID MOKINTI/O SD STRINGERS vx I::-M 00 S/SD SREET TO U L LAMINATES PYLON IWIM STRINGERS TO ISIANALE 78 OFIMOERSALT SLOOCAI/O CORE S/3D FACESDOCTOR THIS POINT AFT S/RI OGRIEL IGRAIN DIRECTION 1/4 01/2 HARDWOOD FGEL TANKSAN ALOM NAGSLIDE-DT ARM LINE FLOOD GPFDRILL N TAP 4-GOLEFT RIGHTPOWER ARM LIRE VALVENODDER LINE COOL 7 CII-ii- Yi~3/32ALSM TONE I, 0II II III F-IF2 4 DOLTH F-S SOFT MOCKUA sure wing stab adequately secure keeping mind fast model VIT AR arm lines terminate loops Rubberbands tied loops complete hookup timer arms sure rubberband tension enough resist flight loads Stabilizer trailing edges tend rise under power sure enough tension used same tension will affect seating timer arms grooves Check check double check Operate timer control functions times sure everything order before going field first step field determine approx imate control settings glide Hook glide arm line timer power arm rudder line should connected As starting point adjust glide arm screw allow stab trailing edge 3/16-in -in above fuselage rudder have approximately F-SF-KPYLON LOTENDS TO NOTTON o-in right offset Test-glide model make appropriate adjustments obtain glide settings roughly correct basic setting lower stabilizer trailing edge about 3/32- -in initial power setting Place shims under stab provide seat power arm hold stabilizer against Set rudder amidship straight initial test flight Hook up control functions start englne check proper flood-off timer opera tion Flood-off must positive engine does stop instantly may fly through timer functions resultant control surface changes gives disastrous results engine does stop instantly may need drill out flood-off fitting allow fuel flow dont drill out large fitting weakened becomes problem use Continued page 121 50 Model Aviation Close-up floodoff system Line timer t cable Wire arm flood valve acts spring tension line Looped line filling tank Better system fuel through engine feed flood lines Goes best 10-4 prop Speartish designed Leroy Cordes fit planform moments Harry Higleys MoHo models averaging around 350 sq wing area maximum 380 very few 300 sq minimum Profile-class models also seem getting heavier maximum 48 oz lightest Guardian Les Pardue weighed 28 oz TWA engine average seemed 34 35 oz Supertigre engines three four ounces heavier specialty engines top seven airplanes averaged just under 38 oz average entries little over 35 oz Navy Carrier Society dinner following Nats competition discussion rules 25 Carrier fliers opinions expressed rather different obtained year ago important decisions reached either unanimous very close Everyone seems resolved inevitability specialty engines concerned about rising cost powerplants limited availability reversal last years survey fliers voted recommend change ball-bearing engines 1982 keeping other engine restrictions change proposal has submitted AMA would combine Class Class II adopt equivalent Class Profile event no engine restrictions set up Junior Senior Profile event no auxiliary surfaces sliders etc stock plain bearing engines CL-82-7 group unanimously opposed such change consensus such radical changes may acceptable local basis national implementation would disastrous Profile bonus points discussed length RichardL Perry 416 Woodhill Drive Golds boro NC 27530 Sea Power/Haught Continued page 50 larger #6 fitting Take note thread failure flood-off fitting will allow engine run until fuel exhausted Repeat engine cut off test several times observe effects engine vibration timer functions well ready flight first flight will have engine run no less two nor three seconds Set power arm stabilizer timer disk -to 1sec delay after engine cut Hook power arm timer hook glide ann anything Set rudder disk 3-sec delay afterstabilizerreleases Hook up rudder timer arm setup will provide instant DT after engine cut giide arm held place Test-run timer ensure adjustments correct Hook up lines again make visual inspection hookups control positions Make rigid rule prior flight Ensure timer fully wound Start engine launch 60- 70-degree angiejust right wind Note climb angie andturn tendency Model should maintain launch angie show slight tendency turn right Observe DT rate descent Correct climb angle adjusting height stab shims Increase height steepen climb vice versa Adjust rudder needed DT too fast lower DT angle slightly Continue 3-sec tests until satisfied climb angle turn tendency satisfied power pattern will safe readjust timer power arm disk stabilizer 3-sec delay after engine cut reduce wing strain speed builds up succes sive flights longer engine run Increase engine run second fly model again Continue observe power pattern engine run increased 1-sec intervals hurry process Make adjustment time keep small attempt transist glide until have attained 7-sec power run may increase delay DT appears putting heavy load wings point should getting good steep climb around 65-70 degrees about three-quarters turn right now ready work transition Adjust DT disk 15 seconds hook up glide arm line DT arm well other lines respective places Watch model closely engine cuts Model should transist smoothly Poor transitions often due improper rudder trimming rudder brought tripped too early will cause right wing go down due kicking tail right results diving turn after engine cut Bad news Late rudder often results stalling Tripping stabilizer too soon results upward pitching stall Releasing stabilizer too late allows model dive Hopefully can get glimpse glide before DT. Remember REVENGER 60-Size Pattern Designed Revenge can sweet new Revenger pattern design can win 65-inch span laminar-flow wing 700 square-inch area helps perform AMA-FAI man euvers new kind smooth ness can read about May 1978 RC Modeler Revenger comes highly prefabricated balsa fuselage assembled sanded Foam wing panels stabilizer presheeted sanded vertical fin Dick Russ rudder presanded shape contest quality balsa Just join wing panels stab add vertical fin Install retracts engine radio mounts cover paint youre ready complete Total weight 81h 8 3/4 lbs Revenge can sweet Revenger. pattern design can win See nearest hobby shop first 4 full line brochure write MODEL MERCHANT 554 E Fronton St. Brownaville TX 73520 no suggested changes current rule agreed upon majority favored rather loose interpretation rule new stands Specific proposals published Com petition Newsletter section October November December 1980 Review submit comments may have NCAC CLCB either directly representatives through AMA HQ Ed note process speeded up Wyou send directly AMA district CLCB member RBM N U U f7EiT7J Strips Balsa Fuzz-Freew/out Adjustments Small -$1000 Large shown-$2000 Please add $100 postage P Kits ature Renlicas EE BEE $600 please ad Si 00 postage Catalog 75 GENE DUBOIS P0 Box c Acuslinet MA 02743 ....DEALER INQUIRIES INVITED 4 Fine Quality Flying Models 98 RUBBER POWER KITS plus Gliders CIL R/C Accessories Books Catalog $150 MAJESTIC MODELS 3273 West 129th Street Cleveland Ohio 44111 adjustment per flight go slowly Sensitivity adjustments increases speed Increase DT time fine-tune glide until satisfied Sea Power contribution state art Free Flight hope enjoy introduction programmable tail feathers FF Duration/Meuser Continued page 53 hungry According Bat Sheet Strat-O-Bats Wash ington Steve Helmick editor Ken Bauer pro ducing electronic timers Nordic Towline Gliders perhaps multi-function timer Power models will come later havent chance check information Ken get photos drawings Helmicks comments Bauers timer look like way go all-weatherA-2 calm-air zoom delay desirable glider does work Basically theres steel plate fastened DT line stuck onto electro-magnet made coil relay Some electronic wizardry IC chip times current flow coil shuts down DT-time comes row tiny rocker switches sets DT time. assigned times 10 40 160 640 seconds flyoffs automatically add together r words punch 40 160 200 sec pretty windy 10 160 170 seconds etc Punch get 850 rockers have hole can slip heavy monofilament pin through lock what want lock out what dont want first rocker switch row just on/off Also micro-switch put front towhook allows timer reset return straight tow go circle tow timer starts means circle less 10-sec setting timer starts model goes CT mode neat thing about drop towline line breaks timer starts model comes down battery goes dead model DTs less chance setting DT too short because no grooves count Seelig timer will speed up weather gets hotter Seeligs lost about 20-30 seconds afternoon heat Taft Ken recommends 9v transistor radio battery power weight about 1 oz battery timer itself quite small light nose pod will probably have specially tailored Bauer timer Oh yes . $25 please interested write Ken Bauer 627 E Monroe Orange CA 92667 Now Tatone no longer imports timers bit problem Seelig timers available expensive Some English companies having timers made Hong Kong dont know available US Some modelers Northwest using Tomy windup toy motors engine cutoff Id like supply details dont have running time too short DT actuation According Aero Modeller magazine some English Free Flighters extending running time two minutes adding inertia escapement heat tip glass-head pin push plastic escapement andprestotwo minutes still doesnt solve problem Category II flying Perhaps abandon clockspring use rubberband-string-and pulley system K-Mart timers still available preferred modelers over Tatone type engine timers have manufacture own faceplate release mechanism See AA Lidbergs article 122 Model Aviation Yes rush copy new 6th edition Radio Control Buyers Guide Please check ElEnclosed $1100 $995 retail plus $105 postage US Canada Only dians send US Funds El Charge El Mastercharge LI Visa City State Zip Return R/C Buyers GuIde 7 Clifton House Clifton VA 22024 5- 34][b739232701319810]] NO NONSENSE BALSA STRIPPERS N