Free Flight Duration Bob Meuser SINGING swans May column supposed have last got frantic call Associate Editor Ross McMul len asking heck column July issue Anyhow Seventeen years almost continuously counting ModelAviadons precursor American Aircraft Modeler Chuck Broadhurst got four days put first column together standing start inked perspective cutaway drawing has hard work fun frustration satisfaction roiled up big loppy sided ball wax very greatly appreciate help Ive gotten great way contributions newsletters photographs material various sorts Im grateful opportunity have met through correspondence flying field seem have less time lower production rate previous years something must go swan song Nothing forever Gyros Some five years ago hot setting available Indoor Outdoor Autogyro records did set two Outdoor ones got done another via fluke rules didnt quite get around Indoor part caper lift provided two side-by-side rigid rotors concept worked nicely Flight dura tionstill akwas typically just under two minutes about half similar fixed-wing model figured wasnt too bad considering inherent inefficiencies gyro However recently occurred might have way off base fixed rotor such using nothing teeters cones just freewheel like windmills has inefficient device mind man could invent blade side thats moving forward does lifting blade other side might doing worse nothing obvious took five years figger out must obvious solution teeter rotors done small mancarrying gyrosBenson like two blades rotor rigidly connected other hinged hub Cierva type two-blade unit hinged about chordwise axis forwardmoving blade teeters up until back ward-moving blade moving downward fast generates equal amount lift Since both blades generating equal amounts lift setup should lot efficient despite fact two sides rotor going through air different velocities Crystal clear eh BinocularsThe NFFS Digest recently ran story Hermann Andreson originally appeared Phoenix MAC newsletter thinking getting pair binocs might wish check out Consumer Reports library too couple years ago did indepth report binoculars Walter Erbach suggests checking out 35 x 50 field glasses true prism binocu lars K-Mart stores regular price $10 $12 found sale $9 price can probably afford leave pair glove compartment model flying box worrying lot about getting swiped might satisfied narrow field view however Safety tips Terry Thorkildsen Satellite using commercial radial mount enginethe kind goes between crankcase backplateand experience crash best check mount thor oughly cracks Terry has several come apart engine running flights later following crash Also dont use spring starter smaller Cox engines remove engine Terry got nasty cut flip-starting engine Dethermalizers full-size aircraft Some time back mentioned something close fact being explored Ed Whitten recently sent clipping 1983 issue New York Times showing Schweizer 1-36 sailplane equipped pop-uptail dethermalizer Dale Reed Reed also contemplating using device aircraft have flown thin atmosphere Mars project now limbo article mentions application Free Flight models Reed early Space Shuttle concepts modeler usually builds flying models concepts working did proposed wingless lifting-body concept Lee Dewitt CL journeyed 1985 FF team semi-fInals Taft CA way Wichita KS model about eight years aid qualified Wakefield easily great innovator Dick Siefrieds new Wakefield R did job Taft too Photos Sal Pruciano 62 Model Aviation Bob Spinks 45-in-span magnet-steered Mini-Magnet slope soarer built plans appeared April1985 issue ofAeromodeller Magnet Steering actuatorand steering fIn ugliness nose model Steering unit adjusted keep model heading desired directioninto wind Shuttle Bentom gearboxes come noses some all-foam almost-ready-to-fly rubber-power modelsand some stick-and-tissue wonders bootand two sizes both max gear-up prop revs motor revs 21 gearboxes can bought separately mail AHC local model shoppe Using noses small models say up 30-in spanis straightforward thats what intended about using such device back gears order put two rubber motors series speak 21 ratio boggles mind little should work out Replace prop shaft motor hook coming out back unit ul timately becomes front Hook motor goes directly prop Use fatter motor other hook slow side Crystal clear again eh hope think Im going tell terrific ideas Try youll hate Making fiberglass cloth behave have trouble edges cloth unraveling have difficulty cutting shape want might try tip Walt Rozelle appeared Plane Talk Walt got idea Rex Hinson Florida Spread out some newspapers some waxed paper top finally glass cloth over Hold down edges weights some sort shuffle around until cloth smooth square spray cloth nitrate dope dries can roll up draw outlines felt-tip pen cut freehand straightedge cloth can applied pre-doped surfaces using thinner just would cov ering tissue imagine scheme would work silk too almost miserable work fiberglass Skywrap revIsIted Since previous column Johii Oldenkamp has put act together now President General Manager Chief Shipping Clerk Skywrap Division Skybox Enterprises something like one-sheet brochure tells about use stuff hints building structures covered adhesives coloring forth 064 grams per square foot light enough covering about anything can imagine tough enough use covering big Outdoor rubber-power models too Whether would stand up Gas model Im surebut bet would OK tips tailfeathers John also suggests using finish coat things like rolled-tube fuselages HL Glider wings props like Hmmm about inside rolled tube before rolled Suitable adhesives range H/C 56 white glue spray adhesives Coloring can done Pactra Namel spray before after cov ering John says Mylar-flim drafting ink works too Ive fussed little seems accept waterproof felt markers OK glving translucent albeit somewhat anemic effect opens possibility using technique Ive tried tissue condenser paper Saw end off felt marker remove soggy entrails Soak lacquer thinner squeeze vital body juices container spray should lighter enamel Masking can done using wet newspapers sure would nt try masking tape unless used such way narrow strip tape stuck filmyou have mask masking tape Build light stiff structureslots diago naisas stuff adds little stifihess pos sibilities endless Prices $350 five 20 x 22-in sheets $750 12 $14 30postpaid plus 6% tax California residents Order Skybox 3331 Adams Ave San Diego CA 92216 Book reporL Free Flight ExpertsForum collection articles presented years Model EnglneerExhibition England published Society Model Aeronautical Engineers Englands AMA Proceeds sales publication go fund British Indoor Outdoor FF teams flying Euro pean World Championships Thats im portant isnt same England expected pay own way Perhaps sales reports will small step least toward getting able modelers dont happen especially well-heeled onto British teams Free Flight cannot allowed become rich-mans sport especially international level Fortunately British modelers better mod elers bookbinders review copy lacked pages through 16and enough pages 17 18 supply army Im certain theyll get sorted out So missed first two articles application Larrabees prop-design methods Free Flight props another about etherless fuels diesel engines Martyn Presnell well-known readers NFFS Symposium Reports applies windtunnel data model-aircraft airfoils design A-i A-2 Towline Gliders Wake field Coupe dHiver rubber-power models curves indicate optimum aspect ratios about 25 30 A-i gliders 15 20 A-2s 18 22 Wakefields eight 12 Coupes least can said about presentation has touch real class John ODonnell Britains Mr Free Flight decades tells about pros cons covering Mylar films Melinex England plus giving lot useful data about using stuff BJ Hunt presents non-copy-protected micro computer programs predicting perform ance analyzing performance Indoor models results enlightening seem square experience isnt abadthingto say about theory using program could lot building flying paper before committing himself lot building foggy foggy dew also presents plans strange stretchedout quasi-tandem Easy B models seem doing rather well rather similar different FM Indoor model too SR Philpott British sur names come presents nifty expose hotting-up CO-2 motors applying engine-room chores Free Flight model CH Edge presents whole bunch inter esting useful material application composite materialsfiberglass carbon bor etc Free Flight models potentials limitations Stafford Screen well-known FAL Power fliers presents incisive brief analysis development class including recent experiences developments MikeFantham name pops up British model mag see presents enlightening discussion relationships between forces structural design occasional failure Continued page 151 July1986 63 Don Munn San Diego Orbiteers club about launch Jimmy Allen Bluebird replica Covering blue silk tissue Craft magnificent flier Oldenkamp FF Scale/Warner Continued page 147 Easy said Frenchman infor mation typical ally accurate abso lutely useless accountant replied typi cal balloonists st charge vehicle cant control having no idea likely effect actions expect previously-uninvolved bystander understand predicament real problem Well Gang bit nonsense via Buoyant Flight LTA Society will have Persevere dont glue yourself model Bill Warner 423-C San Vicente Blvd Santa Monica CA 90402 FF Duration/Meuser Continued page 63 latter under influence former publication such things com petitive activity would seem blokes trying give us colonies run money price however isnt tough 550 airmail 475 surface todays exchange rate amounts $836 $722 real money respectively books 8 x 12 inches 75 pages have soft covers can get check made out British funny-money bank Make said checks payable SMAE F/F Team Travel Fund send Martin Dilly 20 Links Road West Wickham Kent BR4 OQW England oh bye bye have line.There also 1985 report similar nature articles Ian Kaynes Martin Gregorie Stafford Screen Mike Fantham Ron Pollard Prices 500 airmail 425 surface same source havent seen Ill wager its pretty good So Thats Farewell friends Remember treat successor well youve treated maybe better keep him snowed under photos sketches comments ideas general gas Just remember Im dead Id still love hear folksbut nay always have time answer Harry vturphy will continue next month ther month eternities come hes loing some time now Dont forget send mi photos news items etc too Bob Meuser 4200 Gregory St Oakland CA 4619 Bill Hartill will Free Flight Du ation chair September Watch FF Old- Timers/Haught Continued page 64 easy Check proper CO location pro zeed hand gliding Trim gentle glide no stall built-in 200-ft glide 2ircle Remember towhook offset tow rudder will have compensate glide-turn rim wide circle ideal Flying Towline Glider requires two peo leone launch tow auncher merely holds model over head ith nose up slightly say 150 model s pulled launchers hand tow starts launcher must throw model tow-person moves forward wind watching model over shoul der regulating speed control climb flier should watch carefully signs erratic climb veering sideways Releasing tension line will usually release model dont afraid release towline things arent going well good tow should have model climbing angle around 400 tracking straight As model climbs overhead stop towing ease off line tension model should float off line glide its own Ive noticed few contests featuring Towline Glider events coming across desk lately Local interest helps Give Towline tryits fun event Happy chasing Phantom Flash Illinois Model Aero Club celebrating its 75th year postal contest Comet Phantom Flash ROG Flights must posted between April 1 September 1 1986 eligible No modifications design permitted except beefing up struc ture use desired propeller Plans rules can contacting Paul Hel man 1411 Judson Ave Evanston IL 60201 Clarence Haught 3226 Honeysuckle Dr Coeur dAlene ID 83814 Gee Bee R-1/Nunes Continued page 68 three hinge locations per side Pre-cover hinge line used MonoKote Open hinge slots #11 hobby blade centered slot per hinge location Ap ply glue insert hinges Check ease movement satisfied drill small hole through balsa hinge end gluing small pieces round toothpick will afterward cut off sanded flush surface Remove small piece material aft stab slot Zona saw keep piece V/hen stab/elevator assembly dry slide stabilizer slot making sure square model per plan glue position Slide previouslyremoved small piece material back position glue Rudder Shape medium-hard 46 sheet balsa cut out lightening holes desired extra careful avoid break ing off lower rudder tail adds models overall appeal can apply thin CyA area stiffen tail Cut strips built-up sides best way accomplish cut strips bit oversize attach way rudder use thin CyA small triangle straightness dry taper form ers front back small razor plane sanding block formers have added shaped sand back rudder round Again careful around tail Sand rudder front edge allow rudder offset Strive good uniform contact between rudder rudder post satisfied glue fuselage letting dry thoroughly addition really adds special touch THE LEADER IN COMPETITION PROPELLERS NEW SERIES 100 TAILORED HELICAL PITCH DEVELOPED TO GIVE MAXIMUM THRUST AT 4CYCLE ENGINE RPM ALLTHE LATEST TECHNIQUES USED ON OUR PRO SERIES 3 SEE BELOW DIAPITCH THPPRICE 1286/,77/,8 299 18678989 13677/,5379 14677/8479 67689 NEW PRO SERIES 3 NEW HIGH TECH AIRFOIL SECTION 10T020% INCREASE IN THRUST MFG OF SELECT HARD MAPLE WOOD WILLNOTFATIGUE LIKE SYNTHETICS FUEL PROOF HIGH LUSTER FINISH DIAPITCHPRICE 534149 634149 72833/,456179 8334568189 84566/7199 94566/z77/199 104566/,7209 106W8W209 106EW219 1146777/,7/,6229 115W229 116EW239 1167239 124W279 12SW279 1256279 1356349 1456459 IS58659 164/N969 16676969 July1986 151
Edition: Model Aviation - 1986/07
Page Numbers: 62, 63, 151
Free Flight Duration Bob Meuser SINGING swans May column supposed have last got frantic call Associate Editor Ross McMul len asking heck column July issue Anyhow Seventeen years almost continuously counting ModelAviadons precursor American Aircraft Modeler Chuck Broadhurst got four days put first column together standing start inked perspective cutaway drawing has hard work fun frustration satisfaction roiled up big loppy sided ball wax very greatly appreciate help Ive gotten great way contributions newsletters photographs material various sorts Im grateful opportunity have met through correspondence flying field seem have less time lower production rate previous years something must go swan song Nothing forever Gyros Some five years ago hot setting available Indoor Outdoor Autogyro records did set two Outdoor ones got done another via fluke rules didnt quite get around Indoor part caper lift provided two side-by-side rigid rotors concept worked nicely Flight dura tionstill akwas typically just under two minutes about half similar fixed-wing model figured wasnt too bad considering inherent inefficiencies gyro However recently occurred might have way off base fixed rotor such using nothing teeters cones just freewheel like windmills has inefficient device mind man could invent blade side thats moving forward does lifting blade other side might doing worse nothing obvious took five years figger out must obvious solution teeter rotors done small mancarrying gyrosBenson like two blades rotor rigidly connected other hinged hub Cierva type two-blade unit hinged about chordwise axis forwardmoving blade teeters up until back ward-moving blade moving downward fast generates equal amount lift Since both blades generating equal amounts lift setup should lot efficient despite fact two sides rotor going through air different velocities Crystal clear eh BinocularsThe NFFS Digest recently ran story Hermann Andreson originally appeared Phoenix MAC newsletter thinking getting pair binocs might wish check out Consumer Reports library too couple years ago did indepth report binoculars Walter Erbach suggests checking out 35 x 50 field glasses true prism binocu lars K-Mart stores regular price $10 $12 found sale $9 price can probably afford leave pair glove compartment model flying box worrying lot about getting swiped might satisfied narrow field view however Safety tips Terry Thorkildsen Satellite using commercial radial mount enginethe kind goes between crankcase backplateand experience crash best check mount thor oughly cracks Terry has several come apart engine running flights later following crash Also dont use spring starter smaller Cox engines remove engine Terry got nasty cut flip-starting engine Dethermalizers full-size aircraft Some time back mentioned something close fact being explored Ed Whitten recently sent clipping 1983 issue New York Times showing Schweizer 1-36 sailplane equipped pop-uptail dethermalizer Dale Reed Reed also contemplating using device aircraft have flown thin atmosphere Mars project now limbo article mentions application Free Flight models Reed early Space Shuttle concepts modeler usually builds flying models concepts working did proposed wingless lifting-body concept Lee Dewitt CL journeyed 1985 FF team semi-fInals Taft CA way Wichita KS model about eight years aid qualified Wakefield easily great innovator Dick Siefrieds new Wakefield R did job Taft too Photos Sal Pruciano 62 Model Aviation Bob Spinks 45-in-span magnet-steered Mini-Magnet slope soarer built plans appeared April1985 issue ofAeromodeller Magnet Steering actuatorand steering fIn ugliness nose model Steering unit adjusted keep model heading desired directioninto wind Shuttle Bentom gearboxes come noses some all-foam almost-ready-to-fly rubber-power modelsand some stick-and-tissue wonders bootand two sizes both max gear-up prop revs motor revs 21 gearboxes can bought separately mail AHC local model shoppe Using noses small models say up 30-in spanis straightforward thats what intended about using such device back gears order put two rubber motors series speak 21 ratio boggles mind little should work out Replace prop shaft motor hook coming out back unit ul timately becomes front Hook motor goes directly prop Use fatter motor other hook slow side Crystal clear again eh hope think Im going tell terrific ideas Try youll hate Making fiberglass cloth behave have trouble edges cloth unraveling have difficulty cutting shape want might try tip Walt Rozelle appeared Plane Talk Walt got idea Rex Hinson Florida Spread out some newspapers some waxed paper top finally glass cloth over Hold down edges weights some sort shuffle around until cloth smooth square spray cloth nitrate dope dries can roll up draw outlines felt-tip pen cut freehand straightedge cloth can applied pre-doped surfaces using thinner just would cov ering tissue imagine scheme would work silk too almost miserable work fiberglass Skywrap revIsIted Since previous column Johii Oldenkamp has put act together now President General Manager Chief Shipping Clerk Skywrap Division Skybox Enterprises something like one-sheet brochure tells about use stuff hints building structures covered adhesives coloring forth 064 grams per square foot light enough covering about anything can imagine tough enough use covering big Outdoor rubber-power models too Whether would stand up Gas model Im surebut bet would OK tips tailfeathers John also suggests using finish coat things like rolled-tube fuselages HL Glider wings props like Hmmm about inside rolled tube before rolled Suitable adhesives range H/C 56 white glue spray adhesives Coloring can done Pactra Namel spray before after cov ering John says Mylar-flim drafting ink works too Ive fussed little seems accept waterproof felt markers OK glving translucent albeit somewhat anemic effect opens possibility using technique Ive tried tissue condenser paper Saw end off felt marker remove soggy entrails Soak lacquer thinner squeeze vital body juices container spray should lighter enamel Masking can done using wet newspapers sure would nt try masking tape unless used such way narrow strip tape stuck filmyou have mask masking tape Build light stiff structureslots diago naisas stuff adds little stifihess pos sibilities endless Prices $350 five 20 x 22-in sheets $750 12 $14 30postpaid plus 6% tax California residents Order Skybox 3331 Adams Ave San Diego CA 92216 Book reporL Free Flight ExpertsForum collection articles presented years Model EnglneerExhibition England published Society Model Aeronautical Engineers Englands AMA Proceeds sales publication go fund British Indoor Outdoor FF teams flying Euro pean World Championships Thats im portant isnt same England expected pay own way Perhaps sales reports will small step least toward getting able modelers dont happen especially well-heeled onto British teams Free Flight cannot allowed become rich-mans sport especially international level Fortunately British modelers better mod elers bookbinders review copy lacked pages through 16and enough pages 17 18 supply army Im certain theyll get sorted out So missed first two articles application Larrabees prop-design methods Free Flight props another about etherless fuels diesel engines Martyn Presnell well-known readers NFFS Symposium Reports applies windtunnel data model-aircraft airfoils design A-i A-2 Towline Gliders Wake field Coupe dHiver rubber-power models curves indicate optimum aspect ratios about 25 30 A-i gliders 15 20 A-2s 18 22 Wakefields eight 12 Coupes least can said about presentation has touch real class John ODonnell Britains Mr Free Flight decades tells about pros cons covering Mylar films Melinex England plus giving lot useful data about using stuff BJ Hunt presents non-copy-protected micro computer programs predicting perform ance analyzing performance Indoor models results enlightening seem square experience isnt abadthingto say about theory using program could lot building flying paper before committing himself lot building foggy foggy dew also presents plans strange stretchedout quasi-tandem Easy B models seem doing rather well rather similar different FM Indoor model too SR Philpott British sur names come presents nifty expose hotting-up CO-2 motors applying engine-room chores Free Flight model CH Edge presents whole bunch inter esting useful material application composite materialsfiberglass carbon bor etc Free Flight models potentials limitations Stafford Screen well-known FAL Power fliers presents incisive brief analysis development class including recent experiences developments MikeFantham name pops up British model mag see presents enlightening discussion relationships between forces structural design occasional failure Continued page 151 July1986 63 Don Munn San Diego Orbiteers club about launch Jimmy Allen Bluebird replica Covering blue silk tissue Craft magnificent flier Oldenkamp FF Scale/Warner Continued page 147 Easy said Frenchman infor mation typical ally accurate abso lutely useless accountant replied typi cal balloonists st charge vehicle cant control having no idea likely effect actions expect previously-uninvolved bystander understand predicament real problem Well Gang bit nonsense via Buoyant Flight LTA Society will have Persevere dont glue yourself model Bill Warner 423-C San Vicente Blvd Santa Monica CA 90402 FF Duration/Meuser Continued page 63 latter under influence former publication such things com petitive activity would seem blokes trying give us colonies run money price however isnt tough 550 airmail 475 surface todays exchange rate amounts $836 $722 real money respectively books 8 x 12 inches 75 pages have soft covers can get check made out British funny-money bank Make said checks payable SMAE F/F Team Travel Fund send Martin Dilly 20 Links Road West Wickham Kent BR4 OQW England oh bye bye have line.There also 1985 report similar nature articles Ian Kaynes Martin Gregorie Stafford Screen Mike Fantham Ron Pollard Prices 500 airmail 425 surface same source havent seen Ill wager its pretty good So Thats Farewell friends Remember treat successor well youve treated maybe better keep him snowed under photos sketches comments ideas general gas Just remember Im dead Id still love hear folksbut nay always have time answer Harry vturphy will continue next month ther month eternities come hes loing some time now Dont forget send mi photos news items etc too Bob Meuser 4200 Gregory St Oakland CA 4619 Bill Hartill will Free Flight Du ation chair September Watch FF Old- Timers/Haught Continued page 64 easy Check proper CO location pro zeed hand gliding Trim gentle glide no stall built-in 200-ft glide 2ircle Remember towhook offset tow rudder will have compensate glide-turn rim wide circle ideal Flying Towline Glider requires two peo leone launch tow auncher merely holds model over head ith nose up slightly say 150 model s pulled launchers hand tow starts launcher must throw model tow-person moves forward wind watching model over shoul der regulating speed control climb flier should watch carefully signs erratic climb veering sideways Releasing tension line will usually release model dont afraid release towline things arent going well good tow should have model climbing angle around 400 tracking straight As model climbs overhead stop towing ease off line tension model should float off line glide its own Ive noticed few contests featuring Towline Glider events coming across desk lately Local interest helps Give Towline tryits fun event Happy chasing Phantom Flash Illinois Model Aero Club celebrating its 75th year postal contest Comet Phantom Flash ROG Flights must posted between April 1 September 1 1986 eligible No modifications design permitted except beefing up struc ture use desired propeller Plans rules can contacting Paul Hel man 1411 Judson Ave Evanston IL 60201 Clarence Haught 3226 Honeysuckle Dr Coeur dAlene ID 83814 Gee Bee R-1/Nunes Continued page 68 three hinge locations per side Pre-cover hinge line used MonoKote Open hinge slots #11 hobby blade centered slot per hinge location Ap ply glue insert hinges Check ease movement satisfied drill small hole through balsa hinge end gluing small pieces round toothpick will afterward cut off sanded flush surface Remove small piece material aft stab slot Zona saw keep piece V/hen stab/elevator assembly dry slide stabilizer slot making sure square model per plan glue position Slide previouslyremoved small piece material back position glue Rudder Shape medium-hard 46 sheet balsa cut out lightening holes desired extra careful avoid break ing off lower rudder tail adds models overall appeal can apply thin CyA area stiffen tail Cut strips built-up sides best way accomplish cut strips bit oversize attach way rudder use thin CyA small triangle straightness dry taper form ers front back small razor plane sanding block formers have added shaped sand back rudder round Again careful around tail Sand rudder front edge allow rudder offset Strive good uniform contact between rudder rudder post satisfied glue fuselage letting dry thoroughly addition really adds special touch THE LEADER IN COMPETITION PROPELLERS NEW SERIES 100 TAILORED HELICAL PITCH DEVELOPED TO GIVE MAXIMUM THRUST AT 4CYCLE ENGINE RPM ALLTHE LATEST TECHNIQUES USED ON OUR PRO SERIES 3 SEE BELOW DIAPITCH THPPRICE 1286/,77/,8 299 18678989 13677/,5379 14677/8479 67689 NEW PRO SERIES 3 NEW HIGH TECH AIRFOIL SECTION 10T020% INCREASE IN THRUST MFG OF SELECT HARD MAPLE WOOD WILLNOTFATIGUE LIKE SYNTHETICS FUEL PROOF HIGH LUSTER FINISH DIAPITCHPRICE 534149 634149 72833/,456179 8334568189 84566/7199 94566/z77/199 104566/,7209 106W8W209 106EW219 1146777/,7/,6229 115W229 116EW239 1167239 124W279 12SW279 1256279 1356349 1456459 IS58659 164/N969 16676969 July1986 151
Edition: Model Aviation - 1986/07
Page Numbers: 62, 63, 151
Free Flight Duration Bob Meuser SINGING swans May column supposed have last got frantic call Associate Editor Ross McMul len asking heck column July issue Anyhow Seventeen years almost continuously counting ModelAviadons precursor American Aircraft Modeler Chuck Broadhurst got four days put first column together standing start inked perspective cutaway drawing has hard work fun frustration satisfaction roiled up big loppy sided ball wax very greatly appreciate help Ive gotten great way contributions newsletters photographs material various sorts Im grateful opportunity have met through correspondence flying field seem have less time lower production rate previous years something must go swan song Nothing forever Gyros Some five years ago hot setting available Indoor Outdoor Autogyro records did set two Outdoor ones got done another via fluke rules didnt quite get around Indoor part caper lift provided two side-by-side rigid rotors concept worked nicely Flight dura tionstill akwas typically just under two minutes about half similar fixed-wing model figured wasnt too bad considering inherent inefficiencies gyro However recently occurred might have way off base fixed rotor such using nothing teeters cones just freewheel like windmills has inefficient device mind man could invent blade side thats moving forward does lifting blade other side might doing worse nothing obvious took five years figger out must obvious solution teeter rotors done small mancarrying gyrosBenson like two blades rotor rigidly connected other hinged hub Cierva type two-blade unit hinged about chordwise axis forwardmoving blade teeters up until back ward-moving blade moving downward fast generates equal amount lift Since both blades generating equal amounts lift setup should lot efficient despite fact two sides rotor going through air different velocities Crystal clear eh BinocularsThe NFFS Digest recently ran story Hermann Andreson originally appeared Phoenix MAC newsletter thinking getting pair binocs might wish check out Consumer Reports library too couple years ago did indepth report binoculars Walter Erbach suggests checking out 35 x 50 field glasses true prism binocu lars K-Mart stores regular price $10 $12 found sale $9 price can probably afford leave pair glove compartment model flying box worrying lot about getting swiped might satisfied narrow field view however Safety tips Terry Thorkildsen Satellite using commercial radial mount enginethe kind goes between crankcase backplateand experience crash best check mount thor oughly cracks Terry has several come apart engine running flights later following crash Also dont use spring starter smaller Cox engines remove engine Terry got nasty cut flip-starting engine Dethermalizers full-size aircraft Some time back mentioned something close fact being explored Ed Whitten recently sent clipping 1983 issue New York Times showing Schweizer 1-36 sailplane equipped pop-uptail dethermalizer Dale Reed Reed also contemplating using device aircraft have flown thin atmosphere Mars project now limbo article mentions application Free Flight models Reed early Space Shuttle concepts modeler usually builds flying models concepts working did proposed wingless lifting-body concept Lee Dewitt CL journeyed 1985 FF team semi-fInals Taft CA way Wichita KS model about eight years aid qualified Wakefield easily great innovator Dick Siefrieds new Wakefield R did job Taft too Photos Sal Pruciano 62 Model Aviation Bob Spinks 45-in-span magnet-steered Mini-Magnet slope soarer built plans appeared April1985 issue ofAeromodeller Magnet Steering actuatorand steering fIn ugliness nose model Steering unit adjusted keep model heading desired directioninto wind Shuttle Bentom gearboxes come noses some all-foam almost-ready-to-fly rubber-power modelsand some stick-and-tissue wonders bootand two sizes both max gear-up prop revs motor revs 21 gearboxes can bought separately mail AHC local model shoppe Using noses small models say up 30-in spanis straightforward thats what intended about using such device back gears order put two rubber motors series speak 21 ratio boggles mind little should work out Replace prop shaft motor hook coming out back unit ul timately becomes front Hook motor goes directly prop Use fatter motor other hook slow side Crystal clear again eh hope think Im going tell terrific ideas Try youll hate Making fiberglass cloth behave have trouble edges cloth unraveling have difficulty cutting shape want might try tip Walt Rozelle appeared Plane Talk Walt got idea Rex Hinson Florida Spread out some newspapers some waxed paper top finally glass cloth over Hold down edges weights some sort shuffle around until cloth smooth square spray cloth nitrate dope dries can roll up draw outlines felt-tip pen cut freehand straightedge cloth can applied pre-doped surfaces using thinner just would cov ering tissue imagine scheme would work silk too almost miserable work fiberglass Skywrap revIsIted Since previous column Johii Oldenkamp has put act together now President General Manager Chief Shipping Clerk Skywrap Division Skybox Enterprises something like one-sheet brochure tells about use stuff hints building structures covered adhesives coloring forth 064 grams per square foot light enough covering about anything can imagine tough enough use covering big Outdoor rubber-power models too Whether would stand up Gas model Im surebut bet would OK tips tailfeathers John also suggests using finish coat things like rolled-tube fuselages HL Glider wings props like Hmmm about inside rolled tube before rolled Suitable adhesives range H/C 56 white glue spray adhesives Coloring can done Pactra Namel spray before after cov ering John says Mylar-flim drafting ink works too Ive fussed little seems accept waterproof felt markers OK glving translucent albeit somewhat anemic effect opens possibility using technique Ive tried tissue condenser paper Saw end off felt marker remove soggy entrails Soak lacquer thinner squeeze vital body juices container spray should lighter enamel Masking can done using wet newspapers sure would nt try masking tape unless used such way narrow strip tape stuck filmyou have mask masking tape Build light stiff structureslots diago naisas stuff adds little stifihess pos sibilities endless Prices $350 five 20 x 22-in sheets $750 12 $14 30postpaid plus 6% tax California residents Order Skybox 3331 Adams Ave San Diego CA 92216 Book reporL Free Flight ExpertsForum collection articles presented years Model EnglneerExhibition England published Society Model Aeronautical Engineers Englands AMA Proceeds sales publication go fund British Indoor Outdoor FF teams flying Euro pean World Championships Thats im portant isnt same England expected pay own way Perhaps sales reports will small step least toward getting able modelers dont happen especially well-heeled onto British teams Free Flight cannot allowed become rich-mans sport especially international level Fortunately British modelers better mod elers bookbinders review copy lacked pages through 16and enough pages 17 18 supply army Im certain theyll get sorted out So missed first two articles application Larrabees prop-design methods Free Flight props another about etherless fuels diesel engines Martyn Presnell well-known readers NFFS Symposium Reports applies windtunnel data model-aircraft airfoils design A-i A-2 Towline Gliders Wake field Coupe dHiver rubber-power models curves indicate optimum aspect ratios about 25 30 A-i gliders 15 20 A-2s 18 22 Wakefields eight 12 Coupes least can said about presentation has touch real class John ODonnell Britains Mr Free Flight decades tells about pros cons covering Mylar films Melinex England plus giving lot useful data about using stuff BJ Hunt presents non-copy-protected micro computer programs predicting perform ance analyzing performance Indoor models results enlightening seem square experience isnt abadthingto say about theory using program could lot building flying paper before committing himself lot building foggy foggy dew also presents plans strange stretchedout quasi-tandem Easy B models seem doing rather well rather similar different FM Indoor model too SR Philpott British sur names come presents nifty expose hotting-up CO-2 motors applying engine-room chores Free Flight model CH Edge presents whole bunch inter esting useful material application composite materialsfiberglass carbon bor etc Free Flight models potentials limitations Stafford Screen well-known FAL Power fliers presents incisive brief analysis development class including recent experiences developments MikeFantham name pops up British model mag see presents enlightening discussion relationships between forces structural design occasional failure Continued page 151 July1986 63 Don Munn San Diego Orbiteers club about launch Jimmy Allen Bluebird replica Covering blue silk tissue Craft magnificent flier Oldenkamp FF Scale/Warner Continued page 147 Easy said Frenchman infor mation typical ally accurate abso lutely useless accountant replied typi cal balloonists st charge vehicle cant control having no idea likely effect actions expect previously-uninvolved bystander understand predicament real problem Well Gang bit nonsense via Buoyant Flight LTA Society will have Persevere dont glue yourself model Bill Warner 423-C San Vicente Blvd Santa Monica CA 90402 FF Duration/Meuser Continued page 63 latter under influence former publication such things com petitive activity would seem blokes trying give us colonies run money price however isnt tough 550 airmail 475 surface todays exchange rate amounts $836 $722 real money respectively books 8 x 12 inches 75 pages have soft covers can get check made out British funny-money bank Make said checks payable SMAE F/F Team Travel Fund send Martin Dilly 20 Links Road West Wickham Kent BR4 OQW England oh bye bye have line.There also 1985 report similar nature articles Ian Kaynes Martin Gregorie Stafford Screen Mike Fantham Ron Pollard Prices 500 airmail 425 surface same source havent seen Ill wager its pretty good So Thats Farewell friends Remember treat successor well youve treated maybe better keep him snowed under photos sketches comments ideas general gas Just remember Im dead Id still love hear folksbut nay always have time answer Harry vturphy will continue next month ther month eternities come hes loing some time now Dont forget send mi photos news items etc too Bob Meuser 4200 Gregory St Oakland CA 4619 Bill Hartill will Free Flight Du ation chair September Watch FF Old- Timers/Haught Continued page 64 easy Check proper CO location pro zeed hand gliding Trim gentle glide no stall built-in 200-ft glide 2ircle Remember towhook offset tow rudder will have compensate glide-turn rim wide circle ideal Flying Towline Glider requires two peo leone launch tow auncher merely holds model over head ith nose up slightly say 150 model s pulled launchers hand tow starts launcher must throw model tow-person moves forward wind watching model over shoul der regulating speed control climb flier should watch carefully signs erratic climb veering sideways Releasing tension line will usually release model dont afraid release towline things arent going well good tow should have model climbing angle around 400 tracking straight As model climbs overhead stop towing ease off line tension model should float off line glide its own Ive noticed few contests featuring Towline Glider events coming across desk lately Local interest helps Give Towline tryits fun event Happy chasing Phantom Flash Illinois Model Aero Club celebrating its 75th year postal contest Comet Phantom Flash ROG Flights must posted between April 1 September 1 1986 eligible No modifications design permitted except beefing up struc ture use desired propeller Plans rules can contacting Paul Hel man 1411 Judson Ave Evanston IL 60201 Clarence Haught 3226 Honeysuckle Dr Coeur dAlene ID 83814 Gee Bee R-1/Nunes Continued page 68 three hinge locations per side Pre-cover hinge line used MonoKote Open hinge slots #11 hobby blade centered slot per hinge location Ap ply glue insert hinges Check ease movement satisfied drill small hole through balsa hinge end gluing small pieces round toothpick will afterward cut off sanded flush surface Remove small piece material aft stab slot Zona saw keep piece V/hen stab/elevator assembly dry slide stabilizer slot making sure square model per plan glue position Slide previouslyremoved small piece material back position glue Rudder Shape medium-hard 46 sheet balsa cut out lightening holes desired extra careful avoid break ing off lower rudder tail adds models overall appeal can apply thin CyA area stiffen tail Cut strips built-up sides best way accomplish cut strips bit oversize attach way rudder use thin CyA small triangle straightness dry taper form ers front back small razor plane sanding block formers have added shaped sand back rudder round Again careful around tail Sand rudder front edge allow rudder offset Strive good uniform contact between rudder rudder post satisfied glue fuselage letting dry thoroughly addition really adds special touch THE LEADER IN COMPETITION PROPELLERS NEW SERIES 100 TAILORED HELICAL PITCH DEVELOPED TO GIVE MAXIMUM THRUST AT 4CYCLE ENGINE RPM ALLTHE LATEST TECHNIQUES USED ON OUR PRO SERIES 3 SEE BELOW DIAPITCH THPPRICE 1286/,77/,8 299 18678989 13677/,5379 14677/8479 67689 NEW PRO SERIES 3 NEW HIGH TECH AIRFOIL SECTION 10T020% INCREASE IN THRUST MFG OF SELECT HARD MAPLE WOOD WILLNOTFATIGUE LIKE SYNTHETICS FUEL PROOF HIGH LUSTER FINISH DIAPITCHPRICE 534149 634149 72833/,456179 8334568189 84566/7199 94566/z77/199 104566/,7209 106W8W209 106EW219 1146777/,7/,6229 115W229 116EW239 1167239 124W279 12SW279 1256279 1356349 1456459 IS58659 164/N969 16676969 July1986 151