A LOOSE END recent column report special scale event flown popular contests Glastonbury CTOld Timer Rubber Scaleand photo winning model unidentified photographer question arose Does anyone recognize Old Timer model represented Jerry Bockus submitted photo finally found notes reports model Miss Phila delphia IV Thanks feedback Lets hear questions photos ideas Heavy Heavy nice model 1911 Cessna Indoor Scale entry 1978 Nats owner neatly solved basic problem shared replicas airplanes very short nose moment armtail heaviness Photo 1 shows ingenious solution plastic prop driven hand-tooled rubber hook serves dual purpose controlling knot bunching motor Ia Wakefield models adding bit weight help achieve proper model trim passing worth noting proper trim often problem Indoor Scale models quite often motor bunching causes problems neophyte builder short motor usually wont bunch up rub noseblock inside fuselage may hold enough turns get flight time needed win Thus choice motor becomes nice balance between motor length cross-section wider rubber weighs giving power fewer turns Anyone else got neat solution share ideas worth small spot cash used photos used Cartoons has noted time time hobby lives thrives sweat blood dedicated editors fine newsletters published clubs Contest calendars club bus iness modeling hints some super technical semi-technical articles other occasional cartoon appears model club newsletters art form too scarce FFFIiar goodies pour forthoften little thanks club members Now spot humor creeps such cartoons anecdotes such cartoon Fig 1 ap peared Jan 79 issue FFFLiar capably edited Bill Mathews Continued page 112 MODEL z 3 4 5 6 7 ___ FLIGHTTURNS/TORQUE RU BBERMODEL PARTSCoMroAs MAX AVE MAK BACK AFTER or PROP PiA AL TE F~ TEMP SrrE ALTPM INOFF FLiGHT#0PITCH Dennis Jaecks flight parameter record form illustrates important factors should recorded permit consistent contest performance July1979 39 U NEW COMPETITOR -- AFTER CHECKING OUT TIlE COMPETITION llana-TooieU ogrnn egos mis weru u ber bunching 1911 Cessna Indoor Scale model Models short nose moment require extra weight up front Tenny photo ouom view bran niirons new Lasy u wing snows aeiicare riD construction excellent workmanship see text Larry Kruse photo Quiet Power -Tatone Makes Easy new super quiet K&B 40 R/C muffler requires no exhaust plugs fittings adaptors Muffler machined fit exhaust stack cover exposed holes Just bolt on.thats Will reduce noise 10 12 decibels little no loss rpms Noise cancelled interposing sound waves eRadi cal free flow expansion chamber angled blow exhaust away fuselage attach provision pressure fitting Also available ENVA 29 35 40 45 OS MAX 30 35 40 SUPER TIGRE G21 35 46 Add $100 extra above engines specify type pie four different weights placed long board would push down different amount different place total forces downward could considered single force pushing down whatever point along board would necessary give ex actly same effect four differ ent weights resultant point called Center Gravity Therefore change weight location board will shift bal ance point original CU loca tion model nose-heavy balance point further forward rela tion designed Center Gravity Note 2 Baughmans Aviation Diction ary defines Decalage difference angles incidence wings bi plane multiplane measured acute angle between chords plane parallel plane symmetry Rightly wrongly modelers cluding author have expanded term include monoplanes refer ring difference angles inci dence wing stabilizer FF Indoor/Tenny continued page 39 311 Poinciana Dr Birmingham AL 35209 newsletter fairly new very regular usually very informative Bills labor love benefits Alabama FFFlyers group club usual sense Wood Cutting May 79 column carried comments balsa cutting some hints achieving accuracy strength seldom appreciated just what wonders achieved some better craftsmen build Indoor models Stan Chilton Wichita KS craftsmen recent Easy B models have turning times high 16 minutes Cat II sites ceiling heights between 35 100 Photo 2 shows some amazing balsa work Easy Bsand explains model well under 04-oz weight picture shows underside wing visibly tiny rib cross-sections Note main rib uses second balsa piece across bottom help hold curva ture diagonal rib pattern used stiffen wing ribs less 02 maximum dimension appear formidible cutting task Its Easyalmost Actually takes produce such part very sharp knife steady practiced hand very carefully selected wood Wood selection itself topic worthy several columns major ingredient separating top builders competition part must just strong enough carry its share load no excess balloon weight Much time spent choosing just right piece wood part needed actually build part Maxim Indoor models arent hard build just different paragraph above illustrates very well No other type model has applications different techniques Indoor models yet few basic techniques beyond skill model builders two other problems rear ugly headsa precon ceived notion what capable doingI could neverdothat becomes classic self-fulfilling prophesy lack information about some tasks accomplished experienced builder Hopefully what column about sharing various techniques aren t obvious thus encouraging interested persons try hand part model building inexpensive still challenging enough almost anyone Attention Details has noted occasionally small details make break Indoor modelers efforts Nowhere true model trim contest flying tiny shift location models CG center-of gravity wing incidence will rob seconds minutes models performance Changes humidity atmospheric pressure air temperature play part No except computer can remember details enough clarity duplicate previous successful flights make good guess about set up model fly contest inadequate time available make exhaustive test flights Dennis Jaecks really top Pennyplane fliers yet business prevents him doing much testing would comfortable keep track remember Dennis has won Pennyplane once Nats often has held records event Fig 2 shows portion several forms Dennis uses keep track important model details credits such record-keeping much success Note particular builds models interchangable parts soModelParts isaveryimportantdetail permits substitution another part minimize field repair time simply because certain combinations parts work better others Conditions heading often expanded some fliers include relative humidity atmospheric pressure Bud Tenny PO Box 545 Richardson TX 75080 FF Duration/Meuser continued page 41 slow catch labeled new classification recent magazine Frances current big name Georges Matherat curiously enough best known internationally Coupe dHiver modeler curiously enough didnt become big-time flier copying American-style machines rather went own way strange route took sure interesting fuselage model built up around fiberglass boom bones forward section consist vertical crutch mounting engine tank two timers boom imbeded aft end crutch pylon forward-fin whatever choose call makes no concessions mere esthetics Ordinary solid American-style pylons weigh have right often first thing go mild crash regarding its size doubt Americanstyle FF Gas model has suffered too much lateral area up front stab aspect-ratio mere 26 about mere can get doubt winner higher AR gives greater change stab lift given change angle-of-attack So small highAR stab can effective large lowAR model sports timer-actuated autorudder new twist trick mech anism starts DT timer Graupner engine auto-rudder timer actuates making 100% foolproof avoiding possibility launch auto-rudder glide position model built like traditional chiotte de brique employs copious quantities hardwood take pine spruce Plywood used sub-rudder core pylon All-up weight over 8 oz wing area 243 square inches measured flat Cox 112 Model Aviation 1295
Edition: Model Aviation - 1979/07
Page Numbers: 39, 112
A LOOSE END recent column report special scale event flown popular contests Glastonbury CTOld Timer Rubber Scaleand photo winning model unidentified photographer question arose Does anyone recognize Old Timer model represented Jerry Bockus submitted photo finally found notes reports model Miss Phila delphia IV Thanks feedback Lets hear questions photos ideas Heavy Heavy nice model 1911 Cessna Indoor Scale entry 1978 Nats owner neatly solved basic problem shared replicas airplanes very short nose moment armtail heaviness Photo 1 shows ingenious solution plastic prop driven hand-tooled rubber hook serves dual purpose controlling knot bunching motor Ia Wakefield models adding bit weight help achieve proper model trim passing worth noting proper trim often problem Indoor Scale models quite often motor bunching causes problems neophyte builder short motor usually wont bunch up rub noseblock inside fuselage may hold enough turns get flight time needed win Thus choice motor becomes nice balance between motor length cross-section wider rubber weighs giving power fewer turns Anyone else got neat solution share ideas worth small spot cash used photos used Cartoons has noted time time hobby lives thrives sweat blood dedicated editors fine newsletters published clubs Contest calendars club bus iness modeling hints some super technical semi-technical articles other occasional cartoon appears model club newsletters art form too scarce FFFIiar goodies pour forthoften little thanks club members Now spot humor creeps such cartoons anecdotes such cartoon Fig 1 ap peared Jan 79 issue FFFLiar capably edited Bill Mathews Continued page 112 MODEL z 3 4 5 6 7 ___ FLIGHTTURNS/TORQUE RU BBERMODEL PARTSCoMroAs MAX AVE MAK BACK AFTER or PROP PiA AL TE F~ TEMP SrrE ALTPM INOFF FLiGHT#0PITCH Dennis Jaecks flight parameter record form illustrates important factors should recorded permit consistent contest performance July1979 39 U NEW COMPETITOR -- AFTER CHECKING OUT TIlE COMPETITION llana-TooieU ogrnn egos mis weru u ber bunching 1911 Cessna Indoor Scale model Models short nose moment require extra weight up front Tenny photo ouom view bran niirons new Lasy u wing snows aeiicare riD construction excellent workmanship see text Larry Kruse photo Quiet Power -Tatone Makes Easy new super quiet K&B 40 R/C muffler requires no exhaust plugs fittings adaptors Muffler machined fit exhaust stack cover exposed holes Just bolt on.thats Will reduce noise 10 12 decibels little no loss rpms Noise cancelled interposing sound waves eRadi cal free flow expansion chamber angled blow exhaust away fuselage attach provision pressure fitting Also available ENVA 29 35 40 45 OS MAX 30 35 40 SUPER TIGRE G21 35 46 Add $100 extra above engines specify type pie four different weights placed long board would push down different amount different place total forces downward could considered single force pushing down whatever point along board would necessary give ex actly same effect four differ ent weights resultant point called Center Gravity Therefore change weight location board will shift bal ance point original CU loca tion model nose-heavy balance point further forward rela tion designed Center Gravity Note 2 Baughmans Aviation Diction ary defines Decalage difference angles incidence wings bi plane multiplane measured acute angle between chords plane parallel plane symmetry Rightly wrongly modelers cluding author have expanded term include monoplanes refer ring difference angles inci dence wing stabilizer FF Indoor/Tenny continued page 39 311 Poinciana Dr Birmingham AL 35209 newsletter fairly new very regular usually very informative Bills labor love benefits Alabama FFFlyers group club usual sense Wood Cutting May 79 column carried comments balsa cutting some hints achieving accuracy strength seldom appreciated just what wonders achieved some better craftsmen build Indoor models Stan Chilton Wichita KS craftsmen recent Easy B models have turning times high 16 minutes Cat II sites ceiling heights between 35 100 Photo 2 shows some amazing balsa work Easy Bsand explains model well under 04-oz weight picture shows underside wing visibly tiny rib cross-sections Note main rib uses second balsa piece across bottom help hold curva ture diagonal rib pattern used stiffen wing ribs less 02 maximum dimension appear formidible cutting task Its Easyalmost Actually takes produce such part very sharp knife steady practiced hand very carefully selected wood Wood selection itself topic worthy several columns major ingredient separating top builders competition part must just strong enough carry its share load no excess balloon weight Much time spent choosing just right piece wood part needed actually build part Maxim Indoor models arent hard build just different paragraph above illustrates very well No other type model has applications different techniques Indoor models yet few basic techniques beyond skill model builders two other problems rear ugly headsa precon ceived notion what capable doingI could neverdothat becomes classic self-fulfilling prophesy lack information about some tasks accomplished experienced builder Hopefully what column about sharing various techniques aren t obvious thus encouraging interested persons try hand part model building inexpensive still challenging enough almost anyone Attention Details has noted occasionally small details make break Indoor modelers efforts Nowhere true model trim contest flying tiny shift location models CG center-of gravity wing incidence will rob seconds minutes models performance Changes humidity atmospheric pressure air temperature play part No except computer can remember details enough clarity duplicate previous successful flights make good guess about set up model fly contest inadequate time available make exhaustive test flights Dennis Jaecks really top Pennyplane fliers yet business prevents him doing much testing would comfortable keep track remember Dennis has won Pennyplane once Nats often has held records event Fig 2 shows portion several forms Dennis uses keep track important model details credits such record-keeping much success Note particular builds models interchangable parts soModelParts isaveryimportantdetail permits substitution another part minimize field repair time simply because certain combinations parts work better others Conditions heading often expanded some fliers include relative humidity atmospheric pressure Bud Tenny PO Box 545 Richardson TX 75080 FF Duration/Meuser continued page 41 slow catch labeled new classification recent magazine Frances current big name Georges Matherat curiously enough best known internationally Coupe dHiver modeler curiously enough didnt become big-time flier copying American-style machines rather went own way strange route took sure interesting fuselage model built up around fiberglass boom bones forward section consist vertical crutch mounting engine tank two timers boom imbeded aft end crutch pylon forward-fin whatever choose call makes no concessions mere esthetics Ordinary solid American-style pylons weigh have right often first thing go mild crash regarding its size doubt Americanstyle FF Gas model has suffered too much lateral area up front stab aspect-ratio mere 26 about mere can get doubt winner higher AR gives greater change stab lift given change angle-of-attack So small highAR stab can effective large lowAR model sports timer-actuated autorudder new twist trick mech anism starts DT timer Graupner engine auto-rudder timer actuates making 100% foolproof avoiding possibility launch auto-rudder glide position model built like traditional chiotte de brique employs copious quantities hardwood take pine spruce Plywood used sub-rudder core pylon All-up weight over 8 oz wing area 243 square inches measured flat Cox 112 Model Aviation 1295