I/8x 3/B x 40 SPRUCE CUTS FROM l/Bx 1/4/ TRAILING EDGE FIXED TE NI LI L N2 I/B SHEET I/4PLY WOOD 1/16 PLYWOOD Fl MI DRILL B INSTALL 4-40 M2 BLIND NUTS BEFORE MOUNTING IN MODEL COAT WITH EPOXY BEFORE DRILLING TO AVOID CHIPPING P2 I/B PLYWOOD /2 n p~-A/B DOWEL USE TITEBOND FOR FOR SPAR WING IS BUILD FLAT UPSIDE DOWN 1/16 MUSIC WIRE IN BRASS TUBE BEARING\ m III II -- { SERVO CUTOUT CUT BACK TE OF WING 3/16 C_________________ I-07 LI USE 4 HINGES2 1332\I/32 PLYWOOD TOP B BOTTOM PER AILERON 1/4 3/4 T E STOCK - F2 STEP ASSEMBLE Fl F2 MI B M2 KEEP EVERYTHING SQUARE MI M2 COX TO 09 AILERON MOVEMENT NI II ~II OiIOPOflS Ofl giiaSPS Heres well reasi nedand demonstratedproof differential control enhances luality sailplane flight Charles W Bentson LARGE SOARING bird full-scale ailplane majestic sight rolling tioothly banked turns circling perfect coordination Modelers ired emulate soaring flight often nd model glider painfully sluggish sponse awkward turning 20-plus years piloting full-scale 2liders have made ne very particular ~ aIJJutJLDtA JA D %aj~IflO model expect same smootn resp" perfect coordination between ru. aileron would big ship Ailerons essential instant re sponse like model fly few seconds behind stick m transmitter should have same feel stick large glider feel like Im actually aircraft aile ~- rons however must provided right amount differential produce desired response Aileron differential usually over looked models certainly em phasized way should espe cially important slow-flying models long wings probably could ar gued fast pattern ships spend half lives flying upside-down better off aileron differential glider differential will show reluctance roll bank because induced drag downward moving aileron tends pull wing tip back producing adverse yaw rudder glider unable overcome adverse yaw awkward moment turn pro ceeds sluggishly very inspiring avoid worst effects adverse yaw upward aileron movement should least twice much downward movement no downward move ment will surprised briskly model rolls gap bottom wing can reduced minimum no downward movement allowed resulting cleaner wing works well have hinge line top surface wing covering can continued wing right over aileron sealing aileron gap have model glider equipped ailerons no differential want demonstrate effect differential just rig trailing edges both ailerons Rudder aileron can ne operatea two aileron cc Is rudder control connected r1 tor port s lerons neutral System eliminl realistic roll rate like controlling real gli t topl servo eleva tes lay ant response ler Heres Balsarite TM Works. Iron-on coverings tend stick surface balsa often leaving trap ped air sagging coming unglued Balsarite sinks deep wood melts intermixes adhesive covering ironed No trapped air deep permanent adhesion Eliminates sag ging fuelcreep warping due mois ture makes hard-to-reach fillets easy cover use Monokote Solarfilm Coverite must use Balsarite takes gamble out covering iron-ons IRON-ON COVERING &L3j BALSA WOOD j ES IV E F USING WITH BALSARITE COVERITE 2779 Philmont Ave Huntingdcn Valley Pa machine original design through powerplant modification experience pertinent suggestions past have made current results possible CL Navy Carrier/Perry continued page 35 help participate year Ive asked Ted Kraver include rules questionnaire Hi Low Landing Carrier newsletter dont subscribe yet can get action sending five dollars Ted 1212 E Manhatton Dr Tempe AZ 85282 Send ques tionaires will see re sults get CLCR numerous proposals year three areas possible ma jor change subjects Profile Car rier engines bonus points scale-like models Profile Carrier event low-speed flight Profile Carrier engine proposal parallels similar proposals Slow Com bat Slow Rat Race purpose provide single set engine specifications three events help ensure ade quate supply engines available through normal retail outlets pro posals three major changes will probably voted separately would require engines produced least 1000 units Another would require crankcase crankshaft piston cylinder same manufacturer same engine design third change would delete plain-bearing require ment bonus point proposal would en courage use scale-like models Profile Carrier event bonus would small 10 points existing models will made obsolete yet should enough encourage building some scale-like models point award could changed next cycle after have some experience two types models competition scale re quirements quite liberal allow exist ing scale-like profile kits used permit simple installation of moveable surfaces commonly used Pro file Carrier models changes low-speed portion flights would two things would change penalty violations during low speed flight eliminate current conflicting rules say flight official after low-speed signal attempt violation dur ing low-speed flight Under proposed change low-speed violations would result loss low-speed score loss entire flight second change would delete current requirement model de viate radically flight characteris tics prototype substitute re quirement model exceed 600 nose-high attitude latter would provide uniformly enforceable definition Enforcement options include loss flight current penalty loss low-speed score intentional prolonged repeated deviations Another option five-point penalty time 600 limit exceeded would eliminate some judgment calls intentional uninten tional deviations failure correct imme diately would still mean loss flight low-speed score will require officials count deviations Summaries proposals results CLCB voting Competition Newsletter section past issues Richard L Perry S016 Angelita Ave Dayton 0H4S424 Ailerons/Bentson continued page 28 photographs Monterey illustrate simple modification can incorpo rated completed glider excessive work expense ailerons extend about two-thirds distance fuselage wing tips covering peeled back modifica tion made covering re-ironed back External aileron horns used avoid cutting fuselage open flew Monterey several times aileron installed good weather came before job finished aircraft rolled twice fast toward wing aileron Building scratch Id use slotted tubes engaged controls within fuselage im portant consideration model hits hard wings swing forward controls arent ripped out complete job coordinating controls producing realistic ap pearance flight reduce dihedral full-scale gliders may find will also have reduce verti cal tail area glider will tend drop its nose gain speed cir cling Spiral stability objective model will fly itself circling flight minimum attention Reducing fin rudder area may sound rash glider adequate aileron differential much dihedral requires compara tively little vertical tail surface Check relative rudder movement flying model toward away applying control roll first side other model should respond instantly roll too fast should product review product review product review Buzzbee Tachometer latest GloBee re lease small audio tachometer quickly accurately measures engine rpm match ing tones Simply listen engine turn control knob until its tone matches engines sound read rpm setting indi cated dial BuzzBee operates electronic tuning fork principle frequencies simulating engine speed sounds range 2600 35000 rpm Buzzbee effective measuring moving modelsairplanes heli copters boats carsas under re straint starting line unnecessary close whirling propellers en gine can heard rpm reading will de livered Buzzbee can duplicate engine speed settings superior trial runs tuning engine tachometer check compe titors engine rpm powered single NEDA 1604 Series 9-volt battery Inot includ ed Fusite Division 6000 Fernview Ave Cin cinnati OH 45212 product review product review product review 84 Model Aviation no slipping skidding Remember full-scale glider minimum sinking speed requires four six seconds roll 45-degree bank opposite 45-degree bank Faster rates roll detract realism efficiency serve no good purpose Immediate response fast response should objective realistic pleasureful flight Sailpianes meant graceful Please write Box 707 APO NY 09021 have questions comments FF Duration/Meuser continued page 45 own Pirelli hoarded away cen turies using expensive shear-disc strippers spirited away Europe hol lowed-out heel FAI-Team mem bers shoe probability later both Indoor Peanut Scale nuts find commercially available widths perhaps quality liking alternative Jim Jones Handy-Dandy Adjustable Rubber Strip per price $830 postpaid including tracks 3- 4- 5- 6-mm rubber An additional $250 will bring tracks true n rubber Essentially uses time-honored razor-blade trick razor blade real life Stanley utility-knife blade sells around 20 gives two cutting tips dime blade can snapped cut off provide additional cutting tips rubber-guiding tracks see photo run diagonally across guide fea ture allows fine adjustment rubber width sliding blade-holding block along guide Rubber tension con trolled width guide groove slightly less rubberand 0-ring clamps rubber groove takes little skill operate thing anyone has sufficient man ual dexterity build model plane can develop necessary skill short order interested write Jim Jones 36631 Ledgestone Mt Clemens MI 48043 HAND SELECTED PRECISION SANDED SHEETS KS DOWELS S TRIANGLES KS PLANKS so' Film IEXCLUSIVE LOW HEAT ICOVERING FOR IFOAM&BALSA IFLYING MODELS flexible ble fuel procxf tweigbt pflI73 Industries Inc 7060 HOLLYWOOD BLVD. LOS ANGELES CA 90028 Mamco Lives concept gearing sev eral parallel rubber motors single prop goes back earliest days model aviation claims such systems bit outlandish fact remains such systems offer poten tial advantage model classes motor length limited namely flying scale events 1931 Al Hovsepian invented patented system cranks con necting rods gave effect geared motors actually using gears marketed under name Mamco Gearless Transmission Up six motors used drive single prop Production ceased prior World War II Recently small hoard Mamco trans missions uncovered now being peddled off two-motor unit sells $2 three-motor unit $3 Shipping handling 75 per order Write Jim OReilly 4760 N Battin Wichita KS 67220 Quantities limited Leaky Wheels know squeaky wheel gets grease did know leaky wheel gets Duro brand plastic rubber ob tainable friendly auto supply emporium what supposed use Trexler air wheels have leakies according Flightplug Batsheet bit black goop smeared loving care over leak alleged seal invisibly forevermore OK guys what heck Trexler air wheel Anyhow. days old used plug slow leaks bike tires squirting bit canned milk Remove valve first kiddo canned milk would seep out through leak hit air coagulate seal leak Nowadays can buy tubes goop allegedly same thing probably almost well local motorcycle supply mongery should work inflatable wheels cluding used toy airplanes Tight Joints Easy Way cyano September1977 85 TRY THESE OTHER CONTEST QUALITY PRODUCTS FROM PACTRA
Edition: Model Aviation - 1977/09
Page Numbers: 28, 84, 85
I/8x 3/B x 40 SPRUCE CUTS FROM l/Bx 1/4/ TRAILING EDGE FIXED TE NI LI L N2 I/B SHEET I/4PLY WOOD 1/16 PLYWOOD Fl MI DRILL B INSTALL 4-40 M2 BLIND NUTS BEFORE MOUNTING IN MODEL COAT WITH EPOXY BEFORE DRILLING TO AVOID CHIPPING P2 I/B PLYWOOD /2 n p~-A/B DOWEL USE TITEBOND FOR FOR SPAR WING IS BUILD FLAT UPSIDE DOWN 1/16 MUSIC WIRE IN BRASS TUBE BEARING\ m III II -- { SERVO CUTOUT CUT BACK TE OF WING 3/16 C_________________ I-07 LI USE 4 HINGES2 1332\I/32 PLYWOOD TOP B BOTTOM PER AILERON 1/4 3/4 T E STOCK - F2 STEP ASSEMBLE Fl F2 MI B M2 KEEP EVERYTHING SQUARE MI M2 COX TO 09 AILERON MOVEMENT NI II ~II OiIOPOflS Ofl giiaSPS Heres well reasi nedand demonstratedproof differential control enhances luality sailplane flight Charles W Bentson LARGE SOARING bird full-scale ailplane majestic sight rolling tioothly banked turns circling perfect coordination Modelers ired emulate soaring flight often nd model glider painfully sluggish sponse awkward turning 20-plus years piloting full-scale 2liders have made ne very particular ~ aIJJutJLDtA JA D %aj~IflO model expect same smootn resp" perfect coordination between ru. aileron would big ship Ailerons essential instant re sponse like model fly few seconds behind stick m transmitter should have same feel stick large glider feel like Im actually aircraft aile ~- rons however must provided right amount differential produce desired response Aileron differential usually over looked models certainly em phasized way should espe cially important slow-flying models long wings probably could ar gued fast pattern ships spend half lives flying upside-down better off aileron differential glider differential will show reluctance roll bank because induced drag downward moving aileron tends pull wing tip back producing adverse yaw rudder glider unable overcome adverse yaw awkward moment turn pro ceeds sluggishly very inspiring avoid worst effects adverse yaw upward aileron movement should least twice much downward movement no downward move ment will surprised briskly model rolls gap bottom wing can reduced minimum no downward movement allowed resulting cleaner wing works well have hinge line top surface wing covering can continued wing right over aileron sealing aileron gap have model glider equipped ailerons no differential want demonstrate effect differential just rig trailing edges both ailerons Rudder aileron can ne operatea two aileron cc Is rudder control connected r1 tor port s lerons neutral System eliminl realistic roll rate like controlling real gli t topl servo eleva tes lay ant response ler Heres Balsarite TM Works. Iron-on coverings tend stick surface balsa often leaving trap ped air sagging coming unglued Balsarite sinks deep wood melts intermixes adhesive covering ironed No trapped air deep permanent adhesion Eliminates sag ging fuelcreep warping due mois ture makes hard-to-reach fillets easy cover use Monokote Solarfilm Coverite must use Balsarite takes gamble out covering iron-ons IRON-ON COVERING &L3j BALSA WOOD j ES IV E F USING WITH BALSARITE COVERITE 2779 Philmont Ave Huntingdcn Valley Pa machine original design through powerplant modification experience pertinent suggestions past have made current results possible CL Navy Carrier/Perry continued page 35 help participate year Ive asked Ted Kraver include rules questionnaire Hi Low Landing Carrier newsletter dont subscribe yet can get action sending five dollars Ted 1212 E Manhatton Dr Tempe AZ 85282 Send ques tionaires will see re sults get CLCR numerous proposals year three areas possible ma jor change subjects Profile Car rier engines bonus points scale-like models Profile Carrier event low-speed flight Profile Carrier engine proposal parallels similar proposals Slow Com bat Slow Rat Race purpose provide single set engine specifications three events help ensure ade quate supply engines available through normal retail outlets pro posals three major changes will probably voted separately would require engines produced least 1000 units Another would require crankcase crankshaft piston cylinder same manufacturer same engine design third change would delete plain-bearing require ment bonus point proposal would en courage use scale-like models Profile Carrier event bonus would small 10 points existing models will made obsolete yet should enough encourage building some scale-like models point award could changed next cycle after have some experience two types models competition scale re quirements quite liberal allow exist ing scale-like profile kits used permit simple installation of moveable surfaces commonly used Pro file Carrier models changes low-speed portion flights would two things would change penalty violations during low speed flight eliminate current conflicting rules say flight official after low-speed signal attempt violation dur ing low-speed flight Under proposed change low-speed violations would result loss low-speed score loss entire flight second change would delete current requirement model de viate radically flight characteris tics prototype substitute re quirement model exceed 600 nose-high attitude latter would provide uniformly enforceable definition Enforcement options include loss flight current penalty loss low-speed score intentional prolonged repeated deviations Another option five-point penalty time 600 limit exceeded would eliminate some judgment calls intentional uninten tional deviations failure correct imme diately would still mean loss flight low-speed score will require officials count deviations Summaries proposals results CLCB voting Competition Newsletter section past issues Richard L Perry S016 Angelita Ave Dayton 0H4S424 Ailerons/Bentson continued page 28 photographs Monterey illustrate simple modification can incorpo rated completed glider excessive work expense ailerons extend about two-thirds distance fuselage wing tips covering peeled back modifica tion made covering re-ironed back External aileron horns used avoid cutting fuselage open flew Monterey several times aileron installed good weather came before job finished aircraft rolled twice fast toward wing aileron Building scratch Id use slotted tubes engaged controls within fuselage im portant consideration model hits hard wings swing forward controls arent ripped out complete job coordinating controls producing realistic ap pearance flight reduce dihedral full-scale gliders may find will also have reduce verti cal tail area glider will tend drop its nose gain speed cir cling Spiral stability objective model will fly itself circling flight minimum attention Reducing fin rudder area may sound rash glider adequate aileron differential much dihedral requires compara tively little vertical tail surface Check relative rudder movement flying model toward away applying control roll first side other model should respond instantly roll too fast should product review product review product review Buzzbee Tachometer latest GloBee re lease small audio tachometer quickly accurately measures engine rpm match ing tones Simply listen engine turn control knob until its tone matches engines sound read rpm setting indi cated dial BuzzBee operates electronic tuning fork principle frequencies simulating engine speed sounds range 2600 35000 rpm Buzzbee effective measuring moving modelsairplanes heli copters boats carsas under re straint starting line unnecessary close whirling propellers en gine can heard rpm reading will de livered Buzzbee can duplicate engine speed settings superior trial runs tuning engine tachometer check compe titors engine rpm powered single NEDA 1604 Series 9-volt battery Inot includ ed Fusite Division 6000 Fernview Ave Cin cinnati OH 45212 product review product review product review 84 Model Aviation no slipping skidding Remember full-scale glider minimum sinking speed requires four six seconds roll 45-degree bank opposite 45-degree bank Faster rates roll detract realism efficiency serve no good purpose Immediate response fast response should objective realistic pleasureful flight Sailpianes meant graceful Please write Box 707 APO NY 09021 have questions comments FF Duration/Meuser continued page 45 own Pirelli hoarded away cen turies using expensive shear-disc strippers spirited away Europe hol lowed-out heel FAI-Team mem bers shoe probability later both Indoor Peanut Scale nuts find commercially available widths perhaps quality liking alternative Jim Jones Handy-Dandy Adjustable Rubber Strip per price $830 postpaid including tracks 3- 4- 5- 6-mm rubber An additional $250 will bring tracks true n rubber Essentially uses time-honored razor-blade trick razor blade real life Stanley utility-knife blade sells around 20 gives two cutting tips dime blade can snapped cut off provide additional cutting tips rubber-guiding tracks see photo run diagonally across guide fea ture allows fine adjustment rubber width sliding blade-holding block along guide Rubber tension con trolled width guide groove slightly less rubberand 0-ring clamps rubber groove takes little skill operate thing anyone has sufficient man ual dexterity build model plane can develop necessary skill short order interested write Jim Jones 36631 Ledgestone Mt Clemens MI 48043 HAND SELECTED PRECISION SANDED SHEETS KS DOWELS S TRIANGLES KS PLANKS so' Film IEXCLUSIVE LOW HEAT ICOVERING FOR IFOAM&BALSA IFLYING MODELS flexible ble fuel procxf tweigbt pflI73 Industries Inc 7060 HOLLYWOOD BLVD. LOS ANGELES CA 90028 Mamco Lives concept gearing sev eral parallel rubber motors single prop goes back earliest days model aviation claims such systems bit outlandish fact remains such systems offer poten tial advantage model classes motor length limited namely flying scale events 1931 Al Hovsepian invented patented system cranks con necting rods gave effect geared motors actually using gears marketed under name Mamco Gearless Transmission Up six motors used drive single prop Production ceased prior World War II Recently small hoard Mamco trans missions uncovered now being peddled off two-motor unit sells $2 three-motor unit $3 Shipping handling 75 per order Write Jim OReilly 4760 N Battin Wichita KS 67220 Quantities limited Leaky Wheels know squeaky wheel gets grease did know leaky wheel gets Duro brand plastic rubber ob tainable friendly auto supply emporium what supposed use Trexler air wheels have leakies according Flightplug Batsheet bit black goop smeared loving care over leak alleged seal invisibly forevermore OK guys what heck Trexler air wheel Anyhow. days old used plug slow leaks bike tires squirting bit canned milk Remove valve first kiddo canned milk would seep out through leak hit air coagulate seal leak Nowadays can buy tubes goop allegedly same thing probably almost well local motorcycle supply mongery should work inflatable wheels cluding used toy airplanes Tight Joints Easy Way cyano September1977 85 TRY THESE OTHER CONTEST QUALITY PRODUCTS FROM PACTRA
Edition: Model Aviation - 1977/09
Page Numbers: 28, 84, 85
I/8x 3/B x 40 SPRUCE CUTS FROM l/Bx 1/4/ TRAILING EDGE FIXED TE NI LI L N2 I/B SHEET I/4PLY WOOD 1/16 PLYWOOD Fl MI DRILL B INSTALL 4-40 M2 BLIND NUTS BEFORE MOUNTING IN MODEL COAT WITH EPOXY BEFORE DRILLING TO AVOID CHIPPING P2 I/B PLYWOOD /2 n p~-A/B DOWEL USE TITEBOND FOR FOR SPAR WING IS BUILD FLAT UPSIDE DOWN 1/16 MUSIC WIRE IN BRASS TUBE BEARING\ m III II -- { SERVO CUTOUT CUT BACK TE OF WING 3/16 C_________________ I-07 LI USE 4 HINGES2 1332\I/32 PLYWOOD TOP B BOTTOM PER AILERON 1/4 3/4 T E STOCK - F2 STEP ASSEMBLE Fl F2 MI B M2 KEEP EVERYTHING SQUARE MI M2 COX TO 09 AILERON MOVEMENT NI II ~II OiIOPOflS Ofl giiaSPS Heres well reasi nedand demonstratedproof differential control enhances luality sailplane flight Charles W Bentson LARGE SOARING bird full-scale ailplane majestic sight rolling tioothly banked turns circling perfect coordination Modelers ired emulate soaring flight often nd model glider painfully sluggish sponse awkward turning 20-plus years piloting full-scale 2liders have made ne very particular ~ aIJJutJLDtA JA D %aj~IflO model expect same smootn resp" perfect coordination between ru. aileron would big ship Ailerons essential instant re sponse like model fly few seconds behind stick m transmitter should have same feel stick large glider feel like Im actually aircraft aile ~- rons however must provided right amount differential produce desired response Aileron differential usually over looked models certainly em phasized way should espe cially important slow-flying models long wings probably could ar gued fast pattern ships spend half lives flying upside-down better off aileron differential glider differential will show reluctance roll bank because induced drag downward moving aileron tends pull wing tip back producing adverse yaw rudder glider unable overcome adverse yaw awkward moment turn pro ceeds sluggishly very inspiring avoid worst effects adverse yaw upward aileron movement should least twice much downward movement no downward move ment will surprised briskly model rolls gap bottom wing can reduced minimum no downward movement allowed resulting cleaner wing works well have hinge line top surface wing covering can continued wing right over aileron sealing aileron gap have model glider equipped ailerons no differential want demonstrate effect differential just rig trailing edges both ailerons Rudder aileron can ne operatea two aileron cc Is rudder control connected r1 tor port s lerons neutral System eliminl realistic roll rate like controlling real gli t topl servo eleva tes lay ant response ler Heres Balsarite TM Works. Iron-on coverings tend stick surface balsa often leaving trap ped air sagging coming unglued Balsarite sinks deep wood melts intermixes adhesive covering ironed No trapped air deep permanent adhesion Eliminates sag ging fuelcreep warping due mois ture makes hard-to-reach fillets easy cover use Monokote Solarfilm Coverite must use Balsarite takes gamble out covering iron-ons IRON-ON COVERING &L3j BALSA WOOD j ES IV E F USING WITH BALSARITE COVERITE 2779 Philmont Ave Huntingdcn Valley Pa machine original design through powerplant modification experience pertinent suggestions past have made current results possible CL Navy Carrier/Perry continued page 35 help participate year Ive asked Ted Kraver include rules questionnaire Hi Low Landing Carrier newsletter dont subscribe yet can get action sending five dollars Ted 1212 E Manhatton Dr Tempe AZ 85282 Send ques tionaires will see re sults get CLCR numerous proposals year three areas possible ma jor change subjects Profile Car rier engines bonus points scale-like models Profile Carrier event low-speed flight Profile Carrier engine proposal parallels similar proposals Slow Com bat Slow Rat Race purpose provide single set engine specifications three events help ensure ade quate supply engines available through normal retail outlets pro posals three major changes will probably voted separately would require engines produced least 1000 units Another would require crankcase crankshaft piston cylinder same manufacturer same engine design third change would delete plain-bearing require ment bonus point proposal would en courage use scale-like models Profile Carrier event bonus would small 10 points existing models will made obsolete yet should enough encourage building some scale-like models point award could changed next cycle after have some experience two types models competition scale re quirements quite liberal allow exist ing scale-like profile kits used permit simple installation of moveable surfaces commonly used Pro file Carrier models changes low-speed portion flights would two things would change penalty violations during low speed flight eliminate current conflicting rules say flight official after low-speed signal attempt violation dur ing low-speed flight Under proposed change low-speed violations would result loss low-speed score loss entire flight second change would delete current requirement model de viate radically flight characteris tics prototype substitute re quirement model exceed 600 nose-high attitude latter would provide uniformly enforceable definition Enforcement options include loss flight current penalty loss low-speed score intentional prolonged repeated deviations Another option five-point penalty time 600 limit exceeded would eliminate some judgment calls intentional uninten tional deviations failure correct imme diately would still mean loss flight low-speed score will require officials count deviations Summaries proposals results CLCB voting Competition Newsletter section past issues Richard L Perry S016 Angelita Ave Dayton 0H4S424 Ailerons/Bentson continued page 28 photographs Monterey illustrate simple modification can incorpo rated completed glider excessive work expense ailerons extend about two-thirds distance fuselage wing tips covering peeled back modifica tion made covering re-ironed back External aileron horns used avoid cutting fuselage open flew Monterey several times aileron installed good weather came before job finished aircraft rolled twice fast toward wing aileron Building scratch Id use slotted tubes engaged controls within fuselage im portant consideration model hits hard wings swing forward controls arent ripped out complete job coordinating controls producing realistic ap pearance flight reduce dihedral full-scale gliders may find will also have reduce verti cal tail area glider will tend drop its nose gain speed cir cling Spiral stability objective model will fly itself circling flight minimum attention Reducing fin rudder area may sound rash glider adequate aileron differential much dihedral requires compara tively little vertical tail surface Check relative rudder movement flying model toward away applying control roll first side other model should respond instantly roll too fast should product review product review product review Buzzbee Tachometer latest GloBee re lease small audio tachometer quickly accurately measures engine rpm match ing tones Simply listen engine turn control knob until its tone matches engines sound read rpm setting indi cated dial BuzzBee operates electronic tuning fork principle frequencies simulating engine speed sounds range 2600 35000 rpm Buzzbee effective measuring moving modelsairplanes heli copters boats carsas under re straint starting line unnecessary close whirling propellers en gine can heard rpm reading will de livered Buzzbee can duplicate engine speed settings superior trial runs tuning engine tachometer check compe titors engine rpm powered single NEDA 1604 Series 9-volt battery Inot includ ed Fusite Division 6000 Fernview Ave Cin cinnati OH 45212 product review product review product review 84 Model Aviation no slipping skidding Remember full-scale glider minimum sinking speed requires four six seconds roll 45-degree bank opposite 45-degree bank Faster rates roll detract realism efficiency serve no good purpose Immediate response fast response should objective realistic pleasureful flight Sailpianes meant graceful Please write Box 707 APO NY 09021 have questions comments FF Duration/Meuser continued page 45 own Pirelli hoarded away cen turies using expensive shear-disc strippers spirited away Europe hol lowed-out heel FAI-Team mem bers shoe probability later both Indoor Peanut Scale nuts find commercially available widths perhaps quality liking alternative Jim Jones Handy-Dandy Adjustable Rubber Strip per price $830 postpaid including tracks 3- 4- 5- 6-mm rubber An additional $250 will bring tracks true n rubber Essentially uses time-honored razor-blade trick razor blade real life Stanley utility-knife blade sells around 20 gives two cutting tips dime blade can snapped cut off provide additional cutting tips rubber-guiding tracks see photo run diagonally across guide fea ture allows fine adjustment rubber width sliding blade-holding block along guide Rubber tension con trolled width guide groove slightly less rubberand 0-ring clamps rubber groove takes little skill operate thing anyone has sufficient man ual dexterity build model plane can develop necessary skill short order interested write Jim Jones 36631 Ledgestone Mt Clemens MI 48043 HAND SELECTED PRECISION SANDED SHEETS KS DOWELS S TRIANGLES KS PLANKS so' Film IEXCLUSIVE LOW HEAT ICOVERING FOR IFOAM&BALSA IFLYING MODELS flexible ble fuel procxf tweigbt pflI73 Industries Inc 7060 HOLLYWOOD BLVD. LOS ANGELES CA 90028 Mamco Lives concept gearing sev eral parallel rubber motors single prop goes back earliest days model aviation claims such systems bit outlandish fact remains such systems offer poten tial advantage model classes motor length limited namely flying scale events 1931 Al Hovsepian invented patented system cranks con necting rods gave effect geared motors actually using gears marketed under name Mamco Gearless Transmission Up six motors used drive single prop Production ceased prior World War II Recently small hoard Mamco trans missions uncovered now being peddled off two-motor unit sells $2 three-motor unit $3 Shipping handling 75 per order Write Jim OReilly 4760 N Battin Wichita KS 67220 Quantities limited Leaky Wheels know squeaky wheel gets grease did know leaky wheel gets Duro brand plastic rubber ob tainable friendly auto supply emporium what supposed use Trexler air wheels have leakies according Flightplug Batsheet bit black goop smeared loving care over leak alleged seal invisibly forevermore OK guys what heck Trexler air wheel Anyhow. days old used plug slow leaks bike tires squirting bit canned milk Remove valve first kiddo canned milk would seep out through leak hit air coagulate seal leak Nowadays can buy tubes goop allegedly same thing probably almost well local motorcycle supply mongery should work inflatable wheels cluding used toy airplanes Tight Joints Easy Way cyano September1977 85 TRY THESE OTHER CONTEST QUALITY PRODUCTS FROM PACTRA