Old Timers Clarence Haught THE WINNING SYNDROME Old-Timer movement began its major thrust nostalgia low pressure com radeship fun great extent factors still present However people being what are com petitive nature Competition some degree basic living children play shopping bargains perform ance job Competition flying dom inates AMA free-flight events Sport flying rare usually boils down competition preparation training trimming sessions anticipation up coming contest good bad competitive urge infiltrating Old-Timer movement Modelers once chose next project model appealed personal tastes now looking consist ent winners receive numerous newslet ters across country publish contest results showing winning airplane-engine combinations Clippers occasional Powerhouse dominating Antique Cabin classes Pylon usually won either Playboy Zipper Ranger Intercepter few Sailplanes Alerts Western ers now depending engine classes recent contest Tacoma Wash ington annual Power Bash spon sored Boeing Hawks inter esting conversation Tom Alden Tom avid Old-Timer enthusiast Van couver BC made drive down participate Old-Timer fun-fly held conjunction Power Bash Tom has watched growing concern trend toward higher performance com petitive designs told proposing event lesser known designs models placed two three major meets past year Tom tells proposal rejected cause modelers wouldnt build Tom fearful almighty max will overwhelm purposes brought old-time models present popularity Other modelers have expressed similar feelings air picking num ber activity contests might well stick AMA gas some alternatives oldTime-Target event event contest director sets arbitrary target time Two minutes typical no engine run limitations object achieve two minutes exactly Any over under time counted against flight point per second basis Lowest score closest two minutes wins Best flight out three Dethermalizing doesnt count Continued page 93 Left Cranking Super Cyclone beautiful Albatross Taft Larry Clark Note convenient locations engine DT timers Left Airborne ROG half-round wheels Tim Banaszaks Korda Wakefield putting hex poor model Stouffer pic 38 Model Aviation Ed Rangus hand launches Zipper Bong 76 IMAC Old-Timers contest Takeoff boards required site like Stouffer photo Below Bob Schafer flew Miss Philadelphia Taft Brown Junior power dethermalized nearby Kitty Litter factory Maxwell Bassett flew big bird early days really unbeatable Modelilsilca two-page spread shows considerably detail ap parently reprinted directly Russian publication Sure enough tailboom considerably thicker drawing traced Martin Dilly Aeromodeller author states coordinates apply Suns 1974 model presumes ap plies 1975 model table Mod ellistica identical drawings airfoil two publications different night day Hah Ill plot myself expose imposter says I did sort wish hadnt say airfoil came out crooked dogs hind leg would injustice dog Any resemblance between airfoil plotted table Wakefield model living dead purely coincidental extremely unlikely totally ignoring three points fudging bit few others got fairly respectable looking foil Unfortunately fudging must done all-important upper forward region bottom surfacewhich re quired no fudgingturns out within building tolerances true circular arc although slightly bent move maximum undercamber point slightly ward center compare Modellistica airfoil other published airfoils measured calculated its coordinates measuring accuracy about 5 mils 01% closer modelers can build probably closer drawing repre sents model Note undercam ber high point 55% lead ing edge sharp both features being quite different other foil 16- 25mil diameter turbulator placed about 35% station stab section quoted 8% Clark Ythe standard nomen clature flat-bottom model sec tionalthough measures like 7% too has turbulator 12-mil diameter 3% Regarding prop Aeromodeller quotes World Champs report Free Flight News Definitely carved something like pine Indeed Model listica drawing shows extremely thin blades40 mils mostwith undercam ber about 1/16 maximum blade width 165 inchesrather narrow An 8-mil turbulator set back 013 inches hind leading edge Bob Meuser 4200 Gregory St Oak land CA 94619 FF Old-Timers/Haught Continued page 38 can set DT 2 minutes 30 points wont put best now better Fusite has improved its GloBee racing plugs de veloping new alloy almost twice strong 20000 F alloy used its original spiral glow element Ad vanced glass technology refined pro duction techniques have combined new alloy greater plug con sistency under difficult contest conditions racing plug Because racing makes toughest demands plug per formance Fusite has concentrated model other plug models have benefitted attention special interest flyers fact GloBee plugs have absolute leakproof seala hermetic* bond between glass metal pin plug body Other winners circle event demands know model thermals detriment Other such events could devised would encourage modelers search out less common elegant designs columnist certainly has no room talk last three building projects have Ohlsson-60 Playboy Sr McCoy-19 Ranger Madewell-49 Mark Clip per two prior low per formance nostalgic cabin ships Cleveland Cloudster Berklcy Mus keteer So others have fallen victim Winning Syndrome Id like present views direction Old-Timer Write address ap pears end column plugs glow plug manufacturers employ organic fiber gaskets depend mechanical pressure sealing tend oxidize during engine operation subsequently leak GloBees permanent glass-tometal bond affords positive protection against plug seal blowouts lost compres sion resultant burned-up engines make best better Because nothing too good champion ship line winners fly GbBees Because GloBee plugs put sting engine Odds Ends must OldTimers library has published Art Suhr West 218 North 5866 Maclyn Court Menomonee Falls WI 53051 70page book collection manufacturers advertisements appropriate com ments author virtually ignition engines produced plus few probably did reach production book well done magazine size format ideal reference flier collector real trip down memory lane $500 Art currently working another book consisting reprints old engine review articles published modeling press can placed waiting list like traditional building season will April 1977 93 improved last longer under high stress conditions DIVISION OF EMERSON ELECTRIC CO 6000 Feinview Ave Cincinnati Ohio nearing end read havent started new ship next season could well advised look partial kits produced P & W Model Service PO Box 925 Monrovia CA 91016 Schmidt Custom Kits 11948 Franklin Blvd Elk Grove CA 95624 Clipper built P & W par tial kit John Pond plans couldnt believe low price such quality product kit consisted ribs wing stab tips rudder outline curved fuselage parts plus plywood firewall P & W stocks variety popular designs Schmidt Custom will supply partial kits nearly design custom basis Prices right Write lists OT Event Month Rubber Rubber power began still offers challenging satisfying di version Old-Timer enthusiasts fly rubber events Prior introduc tion gas engine rubber models reached considerable sophistication early Zaic yearbooks provide wealth still pertinent information well multitude designs de signs look right home coitest field today Several fact could pass Coupe dHivers SAM rules call strict adherence original design means fold ing props allowed unless used original designs utilizing folders well single-blade prop avail able Prop carving builds character say rate mystery about prop carving removed Zaic yearbooks pitch determination basic theory modelers today feel qual ity rubber 30s better what currently available Having little experience old stock am no position comment However no limits amount rubber allowed duplicate performance should achiev able experimental nature models employing two motors gearing single prop available Old-Timer enthusiast Some systems quite elaborate yet easily fabricated modelers work shop Braided motors another interesting aspect technique developed means combining long running time long motor power burst short motor thereby hopefully obtaining best both worlds Rubber models require fussing perhaps gas models rubber re quires frequent washing eliminate grit lubrication improve life perform ance inspection detect impending fail ure effort prevent exposure heat sunlight regimented preflight proce dure insure proper power under ever present possibility bursting motor destroying model sounds rather formidable actuality great relaxation free dif ficulties locating procuring ig nition engine dont have oil over model days end Clarence Haught Route 5 Box 16 Coeur dA lene ID 83814 FF Indoor/Tenny Continued page 39 may handle high power tur bulent air 4 Use adequate reinforcement around thrust bearing have adequate clearance between motorstick motor Full-power hookups se verely stress front motorstick rubbing knots kill climb and/or wreck stick rubbing through wood 5 Color-code parts model including prop different props used same model sure prop weighs same others Mark props identify pitch different pitch props used 6 Keep careful records model per formance enough detail able repeat good performances 7 If possible test batch rubber keep track motor us ing small marked envelopes sure return motor its home after use different batches vary widely quality important know lind rubber using possible allow crum rubber motor unknown quality sure give nasty surprise 8 Build fly particular design enough learn its strengths weaknesses Take care make successive model design iden tical possible previous models use patterns templates insure uniformity Keep records compo nent weights guide future decisions building remember structure too light hold its shape properly will contribute inconsis tent performance 9 Be aware relationship between models center gravity center motor two points very far apart changing weight rubber will cause models center gravity shift Model Assembly Jigs basic door model jig after prop block cov ered previous columns wing stab outline jig its simplest form outline jig thin cardboard posterboard cut just small enough fit inside wing stab outline Fig 1 Notches 94 Model Aviation STOP ON COMMAND FRICTION BRAKE Complete 10 po nose wheel brake linkage hook-up Features NEW case hardened steel brake drum other fine quality parts Requires very little pressure engage NO 1 57 $2 95 Wh.I ING GEAR STRAPS eofsteel-light strong Includes 4 Straps -iTNO~88 Screws DU BRO UCTS INC 480 BONNER ROAD WAUCONDA ILL 60084DU
Edition: Model Aviation - 1977/04
Page Numbers: 38, 93, 94
Old Timers Clarence Haught THE WINNING SYNDROME Old-Timer movement began its major thrust nostalgia low pressure com radeship fun great extent factors still present However people being what are com petitive nature Competition some degree basic living children play shopping bargains perform ance job Competition flying dom inates AMA free-flight events Sport flying rare usually boils down competition preparation training trimming sessions anticipation up coming contest good bad competitive urge infiltrating Old-Timer movement Modelers once chose next project model appealed personal tastes now looking consist ent winners receive numerous newslet ters across country publish contest results showing winning airplane-engine combinations Clippers occasional Powerhouse dominating Antique Cabin classes Pylon usually won either Playboy Zipper Ranger Intercepter few Sailplanes Alerts Western ers now depending engine classes recent contest Tacoma Wash ington annual Power Bash spon sored Boeing Hawks inter esting conversation Tom Alden Tom avid Old-Timer enthusiast Van couver BC made drive down participate Old-Timer fun-fly held conjunction Power Bash Tom has watched growing concern trend toward higher performance com petitive designs told proposing event lesser known designs models placed two three major meets past year Tom tells proposal rejected cause modelers wouldnt build Tom fearful almighty max will overwhelm purposes brought old-time models present popularity Other modelers have expressed similar feelings air picking num ber activity contests might well stick AMA gas some alternatives oldTime-Target event event contest director sets arbitrary target time Two minutes typical no engine run limitations object achieve two minutes exactly Any over under time counted against flight point per second basis Lowest score closest two minutes wins Best flight out three Dethermalizing doesnt count Continued page 93 Left Cranking Super Cyclone beautiful Albatross Taft Larry Clark Note convenient locations engine DT timers Left Airborne ROG half-round wheels Tim Banaszaks Korda Wakefield putting hex poor model Stouffer pic 38 Model Aviation Ed Rangus hand launches Zipper Bong 76 IMAC Old-Timers contest Takeoff boards required site like Stouffer photo Below Bob Schafer flew Miss Philadelphia Taft Brown Junior power dethermalized nearby Kitty Litter factory Maxwell Bassett flew big bird early days really unbeatable Modelilsilca two-page spread shows considerably detail ap parently reprinted directly Russian publication Sure enough tailboom considerably thicker drawing traced Martin Dilly Aeromodeller author states coordinates apply Suns 1974 model presumes ap plies 1975 model table Mod ellistica identical drawings airfoil two publications different night day Hah Ill plot myself expose imposter says I did sort wish hadnt say airfoil came out crooked dogs hind leg would injustice dog Any resemblance between airfoil plotted table Wakefield model living dead purely coincidental extremely unlikely totally ignoring three points fudging bit few others got fairly respectable looking foil Unfortunately fudging must done all-important upper forward region bottom surfacewhich re quired no fudgingturns out within building tolerances true circular arc although slightly bent move maximum undercamber point slightly ward center compare Modellistica airfoil other published airfoils measured calculated its coordinates measuring accuracy about 5 mils 01% closer modelers can build probably closer drawing repre sents model Note undercam ber high point 55% lead ing edge sharp both features being quite different other foil 16- 25mil diameter turbulator placed about 35% station stab section quoted 8% Clark Ythe standard nomen clature flat-bottom model sec tionalthough measures like 7% too has turbulator 12-mil diameter 3% Regarding prop Aeromodeller quotes World Champs report Free Flight News Definitely carved something like pine Indeed Model listica drawing shows extremely thin blades40 mils mostwith undercam ber about 1/16 maximum blade width 165 inchesrather narrow An 8-mil turbulator set back 013 inches hind leading edge Bob Meuser 4200 Gregory St Oak land CA 94619 FF Old-Timers/Haught Continued page 38 can set DT 2 minutes 30 points wont put best now better Fusite has improved its GloBee racing plugs de veloping new alloy almost twice strong 20000 F alloy used its original spiral glow element Ad vanced glass technology refined pro duction techniques have combined new alloy greater plug con sistency under difficult contest conditions racing plug Because racing makes toughest demands plug per formance Fusite has concentrated model other plug models have benefitted attention special interest flyers fact GloBee plugs have absolute leakproof seala hermetic* bond between glass metal pin plug body Other winners circle event demands know model thermals detriment Other such events could devised would encourage modelers search out less common elegant designs columnist certainly has no room talk last three building projects have Ohlsson-60 Playboy Sr McCoy-19 Ranger Madewell-49 Mark Clip per two prior low per formance nostalgic cabin ships Cleveland Cloudster Berklcy Mus keteer So others have fallen victim Winning Syndrome Id like present views direction Old-Timer Write address ap pears end column plugs glow plug manufacturers employ organic fiber gaskets depend mechanical pressure sealing tend oxidize during engine operation subsequently leak GloBees permanent glass-tometal bond affords positive protection against plug seal blowouts lost compres sion resultant burned-up engines make best better Because nothing too good champion ship line winners fly GbBees Because GloBee plugs put sting engine Odds Ends must OldTimers library has published Art Suhr West 218 North 5866 Maclyn Court Menomonee Falls WI 53051 70page book collection manufacturers advertisements appropriate com ments author virtually ignition engines produced plus few probably did reach production book well done magazine size format ideal reference flier collector real trip down memory lane $500 Art currently working another book consisting reprints old engine review articles published modeling press can placed waiting list like traditional building season will April 1977 93 improved last longer under high stress conditions DIVISION OF EMERSON ELECTRIC CO 6000 Feinview Ave Cincinnati Ohio nearing end read havent started new ship next season could well advised look partial kits produced P & W Model Service PO Box 925 Monrovia CA 91016 Schmidt Custom Kits 11948 Franklin Blvd Elk Grove CA 95624 Clipper built P & W par tial kit John Pond plans couldnt believe low price such quality product kit consisted ribs wing stab tips rudder outline curved fuselage parts plus plywood firewall P & W stocks variety popular designs Schmidt Custom will supply partial kits nearly design custom basis Prices right Write lists OT Event Month Rubber Rubber power began still offers challenging satisfying di version Old-Timer enthusiasts fly rubber events Prior introduc tion gas engine rubber models reached considerable sophistication early Zaic yearbooks provide wealth still pertinent information well multitude designs de signs look right home coitest field today Several fact could pass Coupe dHivers SAM rules call strict adherence original design means fold ing props allowed unless used original designs utilizing folders well single-blade prop avail able Prop carving builds character say rate mystery about prop carving removed Zaic yearbooks pitch determination basic theory modelers today feel qual ity rubber 30s better what currently available Having little experience old stock am no position comment However no limits amount rubber allowed duplicate performance should achiev able experimental nature models employing two motors gearing single prop available Old-Timer enthusiast Some systems quite elaborate yet easily fabricated modelers work shop Braided motors another interesting aspect technique developed means combining long running time long motor power burst short motor thereby hopefully obtaining best both worlds Rubber models require fussing perhaps gas models rubber re quires frequent washing eliminate grit lubrication improve life perform ance inspection detect impending fail ure effort prevent exposure heat sunlight regimented preflight proce dure insure proper power under ever present possibility bursting motor destroying model sounds rather formidable actuality great relaxation free dif ficulties locating procuring ig nition engine dont have oil over model days end Clarence Haught Route 5 Box 16 Coeur dA lene ID 83814 FF Indoor/Tenny Continued page 39 may handle high power tur bulent air 4 Use adequate reinforcement around thrust bearing have adequate clearance between motorstick motor Full-power hookups se verely stress front motorstick rubbing knots kill climb and/or wreck stick rubbing through wood 5 Color-code parts model including prop different props used same model sure prop weighs same others Mark props identify pitch different pitch props used 6 Keep careful records model per formance enough detail able repeat good performances 7 If possible test batch rubber keep track motor us ing small marked envelopes sure return motor its home after use different batches vary widely quality important know lind rubber using possible allow crum rubber motor unknown quality sure give nasty surprise 8 Build fly particular design enough learn its strengths weaknesses Take care make successive model design iden tical possible previous models use patterns templates insure uniformity Keep records compo nent weights guide future decisions building remember structure too light hold its shape properly will contribute inconsis tent performance 9 Be aware relationship between models center gravity center motor two points very far apart changing weight rubber will cause models center gravity shift Model Assembly Jigs basic door model jig after prop block cov ered previous columns wing stab outline jig its simplest form outline jig thin cardboard posterboard cut just small enough fit inside wing stab outline Fig 1 Notches 94 Model Aviation STOP ON COMMAND FRICTION BRAKE Complete 10 po nose wheel brake linkage hook-up Features NEW case hardened steel brake drum other fine quality parts Requires very little pressure engage NO 1 57 $2 95 Wh.I ING GEAR STRAPS eofsteel-light strong Includes 4 Straps -iTNO~88 Screws DU BRO UCTS INC 480 BONNER ROAD WAUCONDA ILL 60084DU
Edition: Model Aviation - 1977/04
Page Numbers: 38, 93, 94
Old Timers Clarence Haught THE WINNING SYNDROME Old-Timer movement began its major thrust nostalgia low pressure com radeship fun great extent factors still present However people being what are com petitive nature Competition some degree basic living children play shopping bargains perform ance job Competition flying dom inates AMA free-flight events Sport flying rare usually boils down competition preparation training trimming sessions anticipation up coming contest good bad competitive urge infiltrating Old-Timer movement Modelers once chose next project model appealed personal tastes now looking consist ent winners receive numerous newslet ters across country publish contest results showing winning airplane-engine combinations Clippers occasional Powerhouse dominating Antique Cabin classes Pylon usually won either Playboy Zipper Ranger Intercepter few Sailplanes Alerts Western ers now depending engine classes recent contest Tacoma Wash ington annual Power Bash spon sored Boeing Hawks inter esting conversation Tom Alden Tom avid Old-Timer enthusiast Van couver BC made drive down participate Old-Timer fun-fly held conjunction Power Bash Tom has watched growing concern trend toward higher performance com petitive designs told proposing event lesser known designs models placed two three major meets past year Tom tells proposal rejected cause modelers wouldnt build Tom fearful almighty max will overwhelm purposes brought old-time models present popularity Other modelers have expressed similar feelings air picking num ber activity contests might well stick AMA gas some alternatives oldTime-Target event event contest director sets arbitrary target time Two minutes typical no engine run limitations object achieve two minutes exactly Any over under time counted against flight point per second basis Lowest score closest two minutes wins Best flight out three Dethermalizing doesnt count Continued page 93 Left Cranking Super Cyclone beautiful Albatross Taft Larry Clark Note convenient locations engine DT timers Left Airborne ROG half-round wheels Tim Banaszaks Korda Wakefield putting hex poor model Stouffer pic 38 Model Aviation Ed Rangus hand launches Zipper Bong 76 IMAC Old-Timers contest Takeoff boards required site like Stouffer photo Below Bob Schafer flew Miss Philadelphia Taft Brown Junior power dethermalized nearby Kitty Litter factory Maxwell Bassett flew big bird early days really unbeatable Modelilsilca two-page spread shows considerably detail ap parently reprinted directly Russian publication Sure enough tailboom considerably thicker drawing traced Martin Dilly Aeromodeller author states coordinates apply Suns 1974 model presumes ap plies 1975 model table Mod ellistica identical drawings airfoil two publications different night day Hah Ill plot myself expose imposter says I did sort wish hadnt say airfoil came out crooked dogs hind leg would injustice dog Any resemblance between airfoil plotted table Wakefield model living dead purely coincidental extremely unlikely totally ignoring three points fudging bit few others got fairly respectable looking foil Unfortunately fudging must done all-important upper forward region bottom surfacewhich re quired no fudgingturns out within building tolerances true circular arc although slightly bent move maximum undercamber point slightly ward center compare Modellistica airfoil other published airfoils measured calculated its coordinates measuring accuracy about 5 mils 01% closer modelers can build probably closer drawing repre sents model Note undercam ber high point 55% lead ing edge sharp both features being quite different other foil 16- 25mil diameter turbulator placed about 35% station stab section quoted 8% Clark Ythe standard nomen clature flat-bottom model sec tionalthough measures like 7% too has turbulator 12-mil diameter 3% Regarding prop Aeromodeller quotes World Champs report Free Flight News Definitely carved something like pine Indeed Model listica drawing shows extremely thin blades40 mils mostwith undercam ber about 1/16 maximum blade width 165 inchesrather narrow An 8-mil turbulator set back 013 inches hind leading edge Bob Meuser 4200 Gregory St Oak land CA 94619 FF Old-Timers/Haught Continued page 38 can set DT 2 minutes 30 points wont put best now better Fusite has improved its GloBee racing plugs de veloping new alloy almost twice strong 20000 F alloy used its original spiral glow element Ad vanced glass technology refined pro duction techniques have combined new alloy greater plug con sistency under difficult contest conditions racing plug Because racing makes toughest demands plug per formance Fusite has concentrated model other plug models have benefitted attention special interest flyers fact GloBee plugs have absolute leakproof seala hermetic* bond between glass metal pin plug body Other winners circle event demands know model thermals detriment Other such events could devised would encourage modelers search out less common elegant designs columnist certainly has no room talk last three building projects have Ohlsson-60 Playboy Sr McCoy-19 Ranger Madewell-49 Mark Clip per two prior low per formance nostalgic cabin ships Cleveland Cloudster Berklcy Mus keteer So others have fallen victim Winning Syndrome Id like present views direction Old-Timer Write address ap pears end column plugs glow plug manufacturers employ organic fiber gaskets depend mechanical pressure sealing tend oxidize during engine operation subsequently leak GloBees permanent glass-tometal bond affords positive protection against plug seal blowouts lost compres sion resultant burned-up engines make best better Because nothing too good champion ship line winners fly GbBees Because GloBee plugs put sting engine Odds Ends must OldTimers library has published Art Suhr West 218 North 5866 Maclyn Court Menomonee Falls WI 53051 70page book collection manufacturers advertisements appropriate com ments author virtually ignition engines produced plus few probably did reach production book well done magazine size format ideal reference flier collector real trip down memory lane $500 Art currently working another book consisting reprints old engine review articles published modeling press can placed waiting list like traditional building season will April 1977 93 improved last longer under high stress conditions DIVISION OF EMERSON ELECTRIC CO 6000 Feinview Ave Cincinnati Ohio nearing end read havent started new ship next season could well advised look partial kits produced P & W Model Service PO Box 925 Monrovia CA 91016 Schmidt Custom Kits 11948 Franklin Blvd Elk Grove CA 95624 Clipper built P & W par tial kit John Pond plans couldnt believe low price such quality product kit consisted ribs wing stab tips rudder outline curved fuselage parts plus plywood firewall P & W stocks variety popular designs Schmidt Custom will supply partial kits nearly design custom basis Prices right Write lists OT Event Month Rubber Rubber power began still offers challenging satisfying di version Old-Timer enthusiasts fly rubber events Prior introduc tion gas engine rubber models reached considerable sophistication early Zaic yearbooks provide wealth still pertinent information well multitude designs de signs look right home coitest field today Several fact could pass Coupe dHivers SAM rules call strict adherence original design means fold ing props allowed unless used original designs utilizing folders well single-blade prop avail able Prop carving builds character say rate mystery about prop carving removed Zaic yearbooks pitch determination basic theory modelers today feel qual ity rubber 30s better what currently available Having little experience old stock am no position comment However no limits amount rubber allowed duplicate performance should achiev able experimental nature models employing two motors gearing single prop available Old-Timer enthusiast Some systems quite elaborate yet easily fabricated modelers work shop Braided motors another interesting aspect technique developed means combining long running time long motor power burst short motor thereby hopefully obtaining best both worlds Rubber models require fussing perhaps gas models rubber re quires frequent washing eliminate grit lubrication improve life perform ance inspection detect impending fail ure effort prevent exposure heat sunlight regimented preflight proce dure insure proper power under ever present possibility bursting motor destroying model sounds rather formidable actuality great relaxation free dif ficulties locating procuring ig nition engine dont have oil over model days end Clarence Haught Route 5 Box 16 Coeur dA lene ID 83814 FF Indoor/Tenny Continued page 39 may handle high power tur bulent air 4 Use adequate reinforcement around thrust bearing have adequate clearance between motorstick motor Full-power hookups se verely stress front motorstick rubbing knots kill climb and/or wreck stick rubbing through wood 5 Color-code parts model including prop different props used same model sure prop weighs same others Mark props identify pitch different pitch props used 6 Keep careful records model per formance enough detail able repeat good performances 7 If possible test batch rubber keep track motor us ing small marked envelopes sure return motor its home after use different batches vary widely quality important know lind rubber using possible allow crum rubber motor unknown quality sure give nasty surprise 8 Build fly particular design enough learn its strengths weaknesses Take care make successive model design iden tical possible previous models use patterns templates insure uniformity Keep records compo nent weights guide future decisions building remember structure too light hold its shape properly will contribute inconsis tent performance 9 Be aware relationship between models center gravity center motor two points very far apart changing weight rubber will cause models center gravity shift Model Assembly Jigs basic door model jig after prop block cov ered previous columns wing stab outline jig its simplest form outline jig thin cardboard posterboard cut just small enough fit inside wing stab outline Fig 1 Notches 94 Model Aviation STOP ON COMMAND FRICTION BRAKE Complete 10 po nose wheel brake linkage hook-up Features NEW case hardened steel brake drum other fine quality parts Requires very little pressure engage NO 1 57 $2 95 Wh.I ING GEAR STRAPS eofsteel-light strong Includes 4 Straps -iTNO~88 Screws DU BRO UCTS INC 480 BONNER ROAD WAUCONDA ILL 60084DU