BABY WAKEFIELD never hear term anymore nutshell phrase did attract Coupe dl-liver other factor Maybe have given longing look Wakefield have stopped short after noticing seemingly complexity typical com petition model Coupe event offers perfect intro duction rubber competition ulti mately Wakefield Experience gained handling Coupe directly applicable larger models Construction meth ods trimming techniques pre-flight pro cedures air picking launch basically similar Coupe high-performance event Ten grams rubber 70-gram airframe requires good air produce 2-minute max Similarly 40-gram motor 190gram airframe Wakefield although somewhat favorable power loading needs good air make 180 seconds Coupe popularity suffered change 100 grams total weight few years ago Some avid competitors built new models new rules particularly Europe did quite well US modelers simply ballasted old models 100 grams mediocre success Coupe entries local contests dimin ished time low feared event would die Forces rallied cause however about two years ago rules changed back 80 grams all-up weight Contest entries during past year have proved wisdom change Coupe dHiver models have flown internationally generationthe perfect introduction competition rubber-power ultimately Wakefield Clarence Haught future Coupe assured can still get started enjoyable event will provide basic skills applicable rubber competition Que dCoupe deliberately designed employ common Wakefield construc tion techniques rolled-balsa tubular fuse lage laminated tips formed prop blades methods easy mas ter produce professional looking model Begin construction flying sur faces Prepare forms wing stab tips fit inside contours tips handy material ie balsa fir ply wood scrap lumber Form should ex tend inch beyond curve Glue-proof edge form rubbing crayon until well waxed Cut required number 1/32 balsa strips C-grain stock long enough form tips allow extra material handling Soak balsa strips warm water 10 minutes Remove strips blot excess water holding strip end around form pull free end around form secure rubberbands Prepare second strip coating side white glue apply over first strip same manner relocating rubberbands hold both strips Repeat until tip completed set aside dry overnight balance wing stab struc ture basic would suggest stacking 1/32 rib blanks between two cardstock templates carving sanding ribs once structures complete sanded apply two coats dope sanding after first coat cover Japanese tissue Water-shrink finish four coats dope wing two stabilizer Apply trim markings cut Japanese tissue second coat Use nitrate Sig Lite Coat dope hold down warping Locate some suitable molds form fuselage tubes length I-inch dowel will suffice motor tube bor rowed pool cue ideal tail boom Cut oversize blanks 4-inch-wide Agrain Sig calls tangent cut sheet balsa 1/16 motor tube 1/32 tail boom 4-inch stock unavail able may join narrower sheet edge edge epoxy cement Lay two pieces out overlapping edges joined about Trim both sheets si multaneously using razor blade straightedge Butt trimmed edges together bench join strip masking tape over seam Remove board fold 40 Model Aviation Opposite page clean Coupe Tubular fuseage rolled sheet balsa pylon satisfies cross-sectional requirement Ten grams rubber 70-gram frame requires good air produce 2-minute max flight Left Homemade winder adapted hand drill Counter frees mind concentrate flight prep wire prop hub takes curse Out prop making allows adjustment blades Below Rubberband provides positive power fold retracted blades wont affect turn Bot tom Prop blades power position ready launch Ship released climb groove nose up right wing slightly down open apply epoxy glue fold shut tape over seam Sand bevel along edge fuselage blanks shown plan Soak blanks water 10 minutes Remove wrap around forms allowing excess sheet overlap beveled edge Bind cloth ban dage allow dry overnight same time prepare 1/32 ply wood reinforcements Wrap soaked plywood around same mold simply roll up sufficient length wet plywood secure rubberband until dry Remove blanks forms cement seams supporting tubular sections -inch dowel gluing glue up fuselage tubes forming molds will have difficulty removing finished tube dry trim off excess sheet sand smooth Fit plywood nose reinforcement stall Make up motor peg reinforcement fuselage joiner install rear motor tube Drill -inch holes motor peg best drilled sharp ened piece -inch brass tubing electric drill Support motor tube short length dowel drilling Install /8-inch balsa bulkhead end fuselage joiner Fit rear boom cement place Sight down completed fuselage tube determine straightness fuselage perfect rotate until offset top mark fuselage top center reference Install rudder stab rest DT hard ware rear end Using protractor reference sand specified thrust angles nose Plug motor peg holes pour about 2 ounces thinned dope motor tube Cap end shake Pour excess dope out allow dry Repeat operation least time seal interior motor tube against rubber lube Dope outside fuselage two coats sanding between Cover tail boom Japanese tissue motor tube two layers silk layer Silron protection against blown motors FULL SIZE PLANS AVAILABLE PAGE 96 3/IA S LEADING EDGE TI 7JI9 I/3D GREET LAMINATE TIPS FROM 1/32 0 I/U STRIP PULL STAKES STRIPS AROOGS WOOLS FORM RUNS AlTO WRITE SLOE 5 LABS FOR WIGS 3 ABS FOR STAS I/H SO LEADIRG EDGE #HP1IIIIII~IIIIIII~ I/MR J2 TMAILIGS EDGE SHUT DOWEL KEYS VR GO ROTTOB SPAR I/IA GUSSETS F-S AF-2 D F-I DIHEDRAL DETAIL TRIB TAG STAB RIG IROFI/3tOF 3/32 WING BIBS ilIZ2z TIP PANEL B OF I/SD 2 0F3/35 MAIN PANEL AGE I/SD 3/32X 3/B TMAILING EDGE U i PAPEB CLIP WIRE STAB PLATFORM I/ID PLYWOOD Y FORM PROP BLADES DR GA CAN BOAR & RIND WITH GTRIP BARRAGE CORER MOTOR TUBE W1TH 2 LAYERS SBB OR LAYER SILNON Q TYPICAL FUSELAGE JOINT DETAIL BEVEL EDOE OF FUSELAGE BLANK SOAK B BIND TO FORM WITH STRIP BANDAGE WREN DRY REMOVE CEMENT SERB TRIM B GURU TYPICAL BLADE GECTIOBIS 1/4 DOWELFABRIC BERtI/B GBEET I2 1/2 IROBENCE TRIM BAER EDGE / APPROX PYLON LRCATION TO LIMIT FWDBLADE FOLD TWIGT ROB SHRE TO ATTAINCEMENT IN PROPER OLACK BLADE TGARELLBAND BOOR DRILL AT AG ANGLE54 ANGLE AT 5 BLADE 07KBTD BALANCE COMPLETED I/B BRAGG TUBESO BLADE BAEO I/IAMOOEL WITH ID GRAM RIND B SOLDERMOTOR INSTALLED L"~- I/IA MUSIC RUREI/IRO sszRINA FUSELAGE WITR SANDPAPER B GLIDE PYLOR RHER FORTR FOB 4"I/3D PLY REIN PREFORM WIRDINO 1100KBY SOAKING ROLLING B DECLINING WITH RUBBERF-S 1/1K MUSIC WIBEPROP STOP SCREWBAND GNTLL DRY 3/32 PLY 1/32 PLY Al BIND NLSOLDERRETAIN NOSE BLOCKI SPRING FROMWITH RUBBER BAND BALL POINT PENIA DIR EDBRASS TURK PAl MODEL SUPPLY BALL I/B GO SPRUCE KEY TANUST BEARING OR 2 PINE BOSE BLOCK OTEEL B BRASS WASHERS BASIC THRUST LINE ARAJSYSENTS 2 RIGHT 1 SOWN COAT INSIDE -OF MOTOR TUBE WITH DOPE I/3D PLY REINF ROLL PROM UHAIN INER I/B SHEET BALSA \ I/B SHEET BLOWN MOTGR BULK1ELD DoNT OMITI 1/4 ALlAH TUBE MOTOR PEG FIF-Z COWER TAIL BOON WITH JAPANESE TOSUE / j i--ROLL FROM BRAIN cTANGENT CUTI VSD GREET BALSA 0I534B6 5F-4 ALL PYLON PARTG 3D SHEET 3/32 SOFT SHEET SOFT BARK BilGES DT ANGLE 45 DORIJIPERTUBE IJPRPEBOJPWBIE DI LIT LWE Que Coupe II CRUR dHHNr BR CLARENCE RAUBIIT 1/16 GUSSETS Iv 140 I/H TOP SPARS NV \ I CENTOR 2 SF V52 OF 3/3D Que dCoupe Cut out pylon parts assemble pylon attach fuselage time wrap fuselage sandpaper slide pylon back forth attain perfect fit Cover pylon Japanese tissue stall wing hold down hooks streamlined pylon provides fuselage cross sectional area required rules Que dCoupe uses can-formed prop blades method construction pro vides good quality blades minimum time material expended feel prop important single com ponent rubber model formed prop blades allow unlimited experimenta tion diameters pitches blade shapes areas Cut rectangular blanks adequate size 1/8 medium sheet stock Soak blanks water 10 minutes bind both blanks either stacked side side approximately 6-inch diameter tin can blanks should canted 15 degrees left vertical provide necessary helical twist finished blade Allow dry thoroughly Drying can hastened baking oven 175 degrees wish Cut blades outline shape Sharpen -inch dowel pencil sharpener epoxy notch blade form hub Above Packing turns inexpensive winding stooge fabricated local welding shopwont flinch motor bursts Left Typical dethermalizer set-up Too much angle brings ship down too fast too little causes spinning45 degrees about right Use fire proof limit line Photos Tim Christie Sand blade airfoil section thinning blade toward tips Drill hole hub trying maintain much accuracy possible although angles specified approximate purpose angles allow blades fold properly against fuselage sides Final adjustments made bend ing wire hub Finish blades dope Apply rein forcing fabric hub areas small hooks provide power fold de sired small rubberband stretched tween hooks through winding loop hub will insure positive fold time Fabricate nose block shown bend wire parts specifications Bush nose block brass tubing stall prop shaft thrust bearing spring Bend 90-degree angle prop shaft bind hub winding 1oop prop shaft copper wire Solder securely Install prop blade hub retain -A wheel collars Trim dowel bears hub provide stop limit blade folding forward Twist wire continued page 93 February 1977 43 Que dCoupe/Haught continued page 43 hub provide proper angle 54 degrees prop shaft 5-inch blade station Check prop balance add weight sand heavy blade bring prop balance Determine proper location prop stop screw stop prop horizontal position tension oil shaft spring winding hook shown plans desirable accessory allows motor wound prop assembly practice prop assembly removed winder engaged directly winding hook After winding length music wire inserted tubing wind ing hook hold wound motor prop nose block assembly hooked procedure lessens possibility damage bursting motors during wind ing Always secure nose block retaining band jolt stopping prop can dislodge nose block disrupt ing flight trim major dilemma facing rubber fliers today difficulty obtaining quality rubber Pirelli long time standard no longer available its replacement Filati does measure up old Pirelli standards inconsistent batch batch old stocks understand Filati getting better samples have tested proved disappointing Some old stock Pirelli available want pay price quantitites limited reason recommend use something available order may become thoroughly familiar its characteristics model will need extensive retrimming new batch rubber leaves about two choices Sig FAI rubber sold Ed Dolby FAI Model Supply chose Dolby rubber takes fewer winds Pirelli has stronger initial burst good perform ance can obtained available 3/16 hs reasonably priced suggest start i/4 FAI rubber experiment other sizes brands model fully acquainted Prepare several motors cutting lengths weigh slightly under 10 grams Wash thoroughly remove talc lubri cate 50-50 mixture glycerine surgical jelly Just pour dab lube palm hand motor other rub vigorously thoroughly coat motor Tie ends together overhand knot pulled tight followed square knot snugged up Clip off short ends Break motors stretching five times length minute increasing stretch six times length another min ute finally releasing tension gradually during one-minute period can break four five motors time smooth door knob makes good anchor end short length -inch larger dowel works good handle end Loop motor six strands chor end solidly Hook winder other end Stretch motor out approxi mately 30 inches crank about 175 turns move slowly continuing wind count Wind until motor bursts note number turns Use figure guide winding flight Allow 5 percent safety margin word about winders just planning flying Coupe small shop egg beater type hand drill will just fine Obtain sturdy hook i/8 material hardware store have nut February 1977 93 flit P R 0 D U CT S N C DAVISVILLE ROAD OW GROVE PA 19090 659-3900 NOW. THE SUPER POWER TEAM Could Start Something Big SUPER/GEL. EXPRESSLY FOR MODEL USE Say goodby batteries really designed something else No need make anymore Super/Gel Fast Charge & Discharge Needed Models Sealed-in Gel No water no spill no leak MA Full 45 amp hours between recharges Long Life Recharge 500 TImes SULLIVAN CHARGER . GREAT TEAMMATE U UL Listed Plugs Ordinary House Current Fully Charges Battery 12 Hours 500 ma Output ideal New Battery Can Used Most Wet Cell Batteries Too hobby eno n FREE SAMPLE Pin Clamps Try em youll want Send ad selfaddressed stamped envelope ROCKET CITY SPECIALTIES 103 Wholesale Ave NE Huntsville Ala 35811 MA Que dCoupecontinued brazed threaded end prevent hook pulling out drill chuck Most drills have approximately 4-to-i gear ratios Determine what yours can convert winder handle turns motor turns plan graduate Wakefield and/or Unlimited buy ready made winder make heavy-duty hand drill Attach D-type handle remove chuck install permanent winding hook Que dCoupe flies right power right glide Prepare flight double checking surfaces alignment Rudder should 1/16 right Wing tab should down 1/16 Tips washed out 1/16 Stab should titled right side high CU thrust line shown plans slack out motor prop blades held folded position rubberband test glide shimming stab until smooth floating glide slight right turn obtained Put 100 hand turns motor launch right wind nose up slightly Observe carefully right moderate climbing turn indicates well looking dangerous traits time As long model does spiral dive right continue add power using winder ship spiral dives re duce right thrust increase wing tab down adjustment As increase power full winds cor rect climb turn angle thrust adjustments small sanding block flight kit handy Keep right wing up tab Adjust glide turn stab tilt glide angle slight CU shifts may fine tune flight trim small rudder tab stabilizer incidence adjustments Change motors other flight practicing flight competition Spinner/Spector continued page 49 Spinners design does away fin ickiness trying get gyro fly variety speeds simple expedient flying speed hows cheap trick uses four systematically related main functional design elements achieve provide stability speed 1 Constant speed rotor 2 Balance forces singular flight speed 3 Pendulum stability 4 Light weight controlled amount induced drag makes almost constant-speed rotor provides lift/drag vector tends stay put can balanced proper alignment prop thrust center gravity slipstream/rotor stream interaction rudder thrust Perturbations flying attitude quickly damped pendu lum action landing gear heavier plane less stable due inertial effects momentary gain/loss airspeed up/downwind turns launches too fast slow will fly much weight launch speed comes highly critical wind will upset Try yourself like add ing weight just rearward CU generate higher angle attack lift watch interesting variety crashes plane destabilizes what starts out smooth flight Construction will find model very quick make few procedures slightly differ ent convention should followed else wont work right balsa version uses North Pacifics 4-dia Skeeter prop bearing equivalent size same no heavier can com pensated bending landing gear aft wheels rubber Sleek Streak equivalent note rubber size fairly critical Select very light straight sheets 1/16 1/32 balsa no denser Skeeters wings used contest grade 1/32 blades soft rigid turned out slightly thicker 1/32 1/20 perfect cant get light wood youd best forget whole thing make plastic model instead can use Sleek Streak landing gear simply bend wheels forward out youll need 1/32 wire rotor shaft might well use make longer landing gear Fly kinds weather experiment rubber Try 3/16 8-strand motors etc Try put Coupe thermal max have some good articles thermals lately Check some RC glider columns Get rubber technique down pat start looking good Wakefield design its much stable Just follow bends original extend legs rotor-shaft bearing must metal nylon else will quickly wear out allow rotor disc tilt out specs indicated CG produces nice climb either real steep climb flat penetration use rearward forward CU building rotor mast respectively forward rearward aw fuselage fuselage mostly cosmetic can vary greatly shape provided same thrust rotor position CU used Build own favorite design uses parameters resulting about 30 hours flight testing fol lowing closely should definitely put ballpark Make rotor first Cut out blades glue together water-based glue wetting out side joint water Holding joint close heat source such heat gun twist negative pitch dihedral blades remember unpowered blades screw downward just glider points down rising thermal Use jig plans get angles exact sure blades straight along diameter sight along re spective leading edges opposite tips Balsarite crystal clear liquid makes balsawood watertight times Monokote sags comes unglued its cause balsa drying out contracting pulling away Monokote Balsarite helps eliminate problem performs same Solarfilm nearly oth er covering makes iron-ons stick bet ter due deep wood penetration Coverite 2779 Philmont Ave Huntingdon Valley Pennsylvania 19006 p roduotviewp rod uctevgewprod uctrviewprod u Ctre o ie W 94 Model Aviation p oduoteviewp rod ootevewprod uct ,viewp rod octreview COX ENGINES COX/SANWA RIC SYSTEMS AIRTRONICS KITS C end catalog complete 525 E Warner Ave ama Ana CA 92702 HOBBIES
Edition: Model Aviation - 1977/02
Page Numbers: 40, 41, 42, 43, 93, 94
BABY WAKEFIELD never hear term anymore nutshell phrase did attract Coupe dl-liver other factor Maybe have given longing look Wakefield have stopped short after noticing seemingly complexity typical com petition model Coupe event offers perfect intro duction rubber competition ulti mately Wakefield Experience gained handling Coupe directly applicable larger models Construction meth ods trimming techniques pre-flight pro cedures air picking launch basically similar Coupe high-performance event Ten grams rubber 70-gram airframe requires good air produce 2-minute max Similarly 40-gram motor 190gram airframe Wakefield although somewhat favorable power loading needs good air make 180 seconds Coupe popularity suffered change 100 grams total weight few years ago Some avid competitors built new models new rules particularly Europe did quite well US modelers simply ballasted old models 100 grams mediocre success Coupe entries local contests dimin ished time low feared event would die Forces rallied cause however about two years ago rules changed back 80 grams all-up weight Contest entries during past year have proved wisdom change Coupe dHiver models have flown internationally generationthe perfect introduction competition rubber-power ultimately Wakefield Clarence Haught future Coupe assured can still get started enjoyable event will provide basic skills applicable rubber competition Que dCoupe deliberately designed employ common Wakefield construc tion techniques rolled-balsa tubular fuse lage laminated tips formed prop blades methods easy mas ter produce professional looking model Begin construction flying sur faces Prepare forms wing stab tips fit inside contours tips handy material ie balsa fir ply wood scrap lumber Form should ex tend inch beyond curve Glue-proof edge form rubbing crayon until well waxed Cut required number 1/32 balsa strips C-grain stock long enough form tips allow extra material handling Soak balsa strips warm water 10 minutes Remove strips blot excess water holding strip end around form pull free end around form secure rubberbands Prepare second strip coating side white glue apply over first strip same manner relocating rubberbands hold both strips Repeat until tip completed set aside dry overnight balance wing stab struc ture basic would suggest stacking 1/32 rib blanks between two cardstock templates carving sanding ribs once structures complete sanded apply two coats dope sanding after first coat cover Japanese tissue Water-shrink finish four coats dope wing two stabilizer Apply trim markings cut Japanese tissue second coat Use nitrate Sig Lite Coat dope hold down warping Locate some suitable molds form fuselage tubes length I-inch dowel will suffice motor tube bor rowed pool cue ideal tail boom Cut oversize blanks 4-inch-wide Agrain Sig calls tangent cut sheet balsa 1/16 motor tube 1/32 tail boom 4-inch stock unavail able may join narrower sheet edge edge epoxy cement Lay two pieces out overlapping edges joined about Trim both sheets si multaneously using razor blade straightedge Butt trimmed edges together bench join strip masking tape over seam Remove board fold 40 Model Aviation Opposite page clean Coupe Tubular fuseage rolled sheet balsa pylon satisfies cross-sectional requirement Ten grams rubber 70-gram frame requires good air produce 2-minute max flight Left Homemade winder adapted hand drill Counter frees mind concentrate flight prep wire prop hub takes curse Out prop making allows adjustment blades Below Rubberband provides positive power fold retracted blades wont affect turn Bot tom Prop blades power position ready launch Ship released climb groove nose up right wing slightly down open apply epoxy glue fold shut tape over seam Sand bevel along edge fuselage blanks shown plan Soak blanks water 10 minutes Remove wrap around forms allowing excess sheet overlap beveled edge Bind cloth ban dage allow dry overnight same time prepare 1/32 ply wood reinforcements Wrap soaked plywood around same mold simply roll up sufficient length wet plywood secure rubberband until dry Remove blanks forms cement seams supporting tubular sections -inch dowel gluing glue up fuselage tubes forming molds will have difficulty removing finished tube dry trim off excess sheet sand smooth Fit plywood nose reinforcement stall Make up motor peg reinforcement fuselage joiner install rear motor tube Drill -inch holes motor peg best drilled sharp ened piece -inch brass tubing electric drill Support motor tube short length dowel drilling Install /8-inch balsa bulkhead end fuselage joiner Fit rear boom cement place Sight down completed fuselage tube determine straightness fuselage perfect rotate until offset top mark fuselage top center reference Install rudder stab rest DT hard ware rear end Using protractor reference sand specified thrust angles nose Plug motor peg holes pour about 2 ounces thinned dope motor tube Cap end shake Pour excess dope out allow dry Repeat operation least time seal interior motor tube against rubber lube Dope outside fuselage two coats sanding between Cover tail boom Japanese tissue motor tube two layers silk layer Silron protection against blown motors FULL SIZE PLANS AVAILABLE PAGE 96 3/IA S LEADING EDGE TI 7JI9 I/3D GREET LAMINATE TIPS FROM 1/32 0 I/U STRIP PULL STAKES STRIPS AROOGS WOOLS FORM RUNS AlTO WRITE SLOE 5 LABS FOR WIGS 3 ABS FOR STAS I/H SO LEADIRG EDGE #HP1IIIIII~IIIIIII~ I/MR J2 TMAILIGS EDGE SHUT DOWEL KEYS VR GO ROTTOB SPAR I/IA GUSSETS F-S AF-2 D F-I DIHEDRAL DETAIL TRIB TAG STAB RIG IROFI/3tOF 3/32 WING BIBS ilIZ2z TIP PANEL B OF I/SD 2 0F3/35 MAIN PANEL AGE I/SD 3/32X 3/B TMAILING EDGE U i PAPEB CLIP WIRE STAB PLATFORM I/ID PLYWOOD Y FORM PROP BLADES DR GA CAN BOAR & RIND WITH GTRIP BARRAGE CORER MOTOR TUBE W1TH 2 LAYERS SBB OR LAYER SILNON Q TYPICAL FUSELAGE JOINT DETAIL BEVEL EDOE OF FUSELAGE BLANK SOAK B BIND TO FORM WITH STRIP BANDAGE WREN DRY REMOVE CEMENT SERB TRIM B GURU TYPICAL BLADE GECTIOBIS 1/4 DOWELFABRIC BERtI/B GBEET I2 1/2 IROBENCE TRIM BAER EDGE / APPROX PYLON LRCATION TO LIMIT FWDBLADE FOLD TWIGT ROB SHRE TO ATTAINCEMENT IN PROPER OLACK BLADE TGARELLBAND BOOR DRILL AT AG ANGLE54 ANGLE AT 5 BLADE 07KBTD BALANCE COMPLETED I/B BRAGG TUBESO BLADE BAEO I/IAMOOEL WITH ID GRAM RIND B SOLDERMOTOR INSTALLED L"~- I/IA MUSIC RUREI/IRO sszRINA FUSELAGE WITR SANDPAPER B GLIDE PYLOR RHER FORTR FOB 4"I/3D PLY REIN PREFORM WIRDINO 1100KBY SOAKING ROLLING B DECLINING WITH RUBBERF-S 1/1K MUSIC WIBEPROP STOP SCREWBAND GNTLL DRY 3/32 PLY 1/32 PLY Al BIND NLSOLDERRETAIN NOSE BLOCKI SPRING FROMWITH RUBBER BAND BALL POINT PENIA DIR EDBRASS TURK PAl MODEL SUPPLY BALL I/B GO SPRUCE KEY TANUST BEARING OR 2 PINE BOSE BLOCK OTEEL B BRASS WASHERS BASIC THRUST LINE ARAJSYSENTS 2 RIGHT 1 SOWN COAT INSIDE -OF MOTOR TUBE WITH DOPE I/3D PLY REINF ROLL PROM UHAIN INER I/B SHEET BALSA \ I/B SHEET BLOWN MOTGR BULK1ELD DoNT OMITI 1/4 ALlAH TUBE MOTOR PEG FIF-Z COWER TAIL BOON WITH JAPANESE TOSUE / j i--ROLL FROM BRAIN cTANGENT CUTI VSD GREET BALSA 0I534B6 5F-4 ALL PYLON PARTG 3D SHEET 3/32 SOFT SHEET SOFT BARK BilGES DT ANGLE 45 DORIJIPERTUBE IJPRPEBOJPWBIE DI LIT LWE Que Coupe II CRUR dHHNr BR CLARENCE RAUBIIT 1/16 GUSSETS Iv 140 I/H TOP SPARS NV \ I CENTOR 2 SF V52 OF 3/3D Que dCoupe Cut out pylon parts assemble pylon attach fuselage time wrap fuselage sandpaper slide pylon back forth attain perfect fit Cover pylon Japanese tissue stall wing hold down hooks streamlined pylon provides fuselage cross sectional area required rules Que dCoupe uses can-formed prop blades method construction pro vides good quality blades minimum time material expended feel prop important single com ponent rubber model formed prop blades allow unlimited experimenta tion diameters pitches blade shapes areas Cut rectangular blanks adequate size 1/8 medium sheet stock Soak blanks water 10 minutes bind both blanks either stacked side side approximately 6-inch diameter tin can blanks should canted 15 degrees left vertical provide necessary helical twist finished blade Allow dry thoroughly Drying can hastened baking oven 175 degrees wish Cut blades outline shape Sharpen -inch dowel pencil sharpener epoxy notch blade form hub Above Packing turns inexpensive winding stooge fabricated local welding shopwont flinch motor bursts Left Typical dethermalizer set-up Too much angle brings ship down too fast too little causes spinning45 degrees about right Use fire proof limit line Photos Tim Christie Sand blade airfoil section thinning blade toward tips Drill hole hub trying maintain much accuracy possible although angles specified approximate purpose angles allow blades fold properly against fuselage sides Final adjustments made bend ing wire hub Finish blades dope Apply rein forcing fabric hub areas small hooks provide power fold de sired small rubberband stretched tween hooks through winding loop hub will insure positive fold time Fabricate nose block shown bend wire parts specifications Bush nose block brass tubing stall prop shaft thrust bearing spring Bend 90-degree angle prop shaft bind hub winding 1oop prop shaft copper wire Solder securely Install prop blade hub retain -A wheel collars Trim dowel bears hub provide stop limit blade folding forward Twist wire continued page 93 February 1977 43 Que dCoupe/Haught continued page 43 hub provide proper angle 54 degrees prop shaft 5-inch blade station Check prop balance add weight sand heavy blade bring prop balance Determine proper location prop stop screw stop prop horizontal position tension oil shaft spring winding hook shown plans desirable accessory allows motor wound prop assembly practice prop assembly removed winder engaged directly winding hook After winding length music wire inserted tubing wind ing hook hold wound motor prop nose block assembly hooked procedure lessens possibility damage bursting motors during wind ing Always secure nose block retaining band jolt stopping prop can dislodge nose block disrupt ing flight trim major dilemma facing rubber fliers today difficulty obtaining quality rubber Pirelli long time standard no longer available its replacement Filati does measure up old Pirelli standards inconsistent batch batch old stocks understand Filati getting better samples have tested proved disappointing Some old stock Pirelli available want pay price quantitites limited reason recommend use something available order may become thoroughly familiar its characteristics model will need extensive retrimming new batch rubber leaves about two choices Sig FAI rubber sold Ed Dolby FAI Model Supply chose Dolby rubber takes fewer winds Pirelli has stronger initial burst good perform ance can obtained available 3/16 hs reasonably priced suggest start i/4 FAI rubber experiment other sizes brands model fully acquainted Prepare several motors cutting lengths weigh slightly under 10 grams Wash thoroughly remove talc lubri cate 50-50 mixture glycerine surgical jelly Just pour dab lube palm hand motor other rub vigorously thoroughly coat motor Tie ends together overhand knot pulled tight followed square knot snugged up Clip off short ends Break motors stretching five times length minute increasing stretch six times length another min ute finally releasing tension gradually during one-minute period can break four five motors time smooth door knob makes good anchor end short length -inch larger dowel works good handle end Loop motor six strands chor end solidly Hook winder other end Stretch motor out approxi mately 30 inches crank about 175 turns move slowly continuing wind count Wind until motor bursts note number turns Use figure guide winding flight Allow 5 percent safety margin word about winders just planning flying Coupe small shop egg beater type hand drill will just fine Obtain sturdy hook i/8 material hardware store have nut February 1977 93 flit P R 0 D U CT S N C DAVISVILLE ROAD OW GROVE PA 19090 659-3900 NOW. THE SUPER POWER TEAM Could Start Something Big SUPER/GEL. EXPRESSLY FOR MODEL USE Say goodby batteries really designed something else No need make anymore Super/Gel Fast Charge & Discharge Needed Models Sealed-in Gel No water no spill no leak MA Full 45 amp hours between recharges Long Life Recharge 500 TImes SULLIVAN CHARGER . GREAT TEAMMATE U UL Listed Plugs Ordinary House Current Fully Charges Battery 12 Hours 500 ma Output ideal New Battery Can Used Most Wet Cell Batteries Too hobby eno n FREE SAMPLE Pin Clamps Try em youll want Send ad selfaddressed stamped envelope ROCKET CITY SPECIALTIES 103 Wholesale Ave NE Huntsville Ala 35811 MA Que dCoupecontinued brazed threaded end prevent hook pulling out drill chuck Most drills have approximately 4-to-i gear ratios Determine what yours can convert winder handle turns motor turns plan graduate Wakefield and/or Unlimited buy ready made winder make heavy-duty hand drill Attach D-type handle remove chuck install permanent winding hook Que dCoupe flies right power right glide Prepare flight double checking surfaces alignment Rudder should 1/16 right Wing tab should down 1/16 Tips washed out 1/16 Stab should titled right side high CU thrust line shown plans slack out motor prop blades held folded position rubberband test glide shimming stab until smooth floating glide slight right turn obtained Put 100 hand turns motor launch right wind nose up slightly Observe carefully right moderate climbing turn indicates well looking dangerous traits time As long model does spiral dive right continue add power using winder ship spiral dives re duce right thrust increase wing tab down adjustment As increase power full winds cor rect climb turn angle thrust adjustments small sanding block flight kit handy Keep right wing up tab Adjust glide turn stab tilt glide angle slight CU shifts may fine tune flight trim small rudder tab stabilizer incidence adjustments Change motors other flight practicing flight competition Spinner/Spector continued page 49 Spinners design does away fin ickiness trying get gyro fly variety speeds simple expedient flying speed hows cheap trick uses four systematically related main functional design elements achieve provide stability speed 1 Constant speed rotor 2 Balance forces singular flight speed 3 Pendulum stability 4 Light weight controlled amount induced drag makes almost constant-speed rotor provides lift/drag vector tends stay put can balanced proper alignment prop thrust center gravity slipstream/rotor stream interaction rudder thrust Perturbations flying attitude quickly damped pendu lum action landing gear heavier plane less stable due inertial effects momentary gain/loss airspeed up/downwind turns launches too fast slow will fly much weight launch speed comes highly critical wind will upset Try yourself like add ing weight just rearward CU generate higher angle attack lift watch interesting variety crashes plane destabilizes what starts out smooth flight Construction will find model very quick make few procedures slightly differ ent convention should followed else wont work right balsa version uses North Pacifics 4-dia Skeeter prop bearing equivalent size same no heavier can com pensated bending landing gear aft wheels rubber Sleek Streak equivalent note rubber size fairly critical Select very light straight sheets 1/16 1/32 balsa no denser Skeeters wings used contest grade 1/32 blades soft rigid turned out slightly thicker 1/32 1/20 perfect cant get light wood youd best forget whole thing make plastic model instead can use Sleek Streak landing gear simply bend wheels forward out youll need 1/32 wire rotor shaft might well use make longer landing gear Fly kinds weather experiment rubber Try 3/16 8-strand motors etc Try put Coupe thermal max have some good articles thermals lately Check some RC glider columns Get rubber technique down pat start looking good Wakefield design its much stable Just follow bends original extend legs rotor-shaft bearing must metal nylon else will quickly wear out allow rotor disc tilt out specs indicated CG produces nice climb either real steep climb flat penetration use rearward forward CU building rotor mast respectively forward rearward aw fuselage fuselage mostly cosmetic can vary greatly shape provided same thrust rotor position CU used Build own favorite design uses parameters resulting about 30 hours flight testing fol lowing closely should definitely put ballpark Make rotor first Cut out blades glue together water-based glue wetting out side joint water Holding joint close heat source such heat gun twist negative pitch dihedral blades remember unpowered blades screw downward just glider points down rising thermal Use jig plans get angles exact sure blades straight along diameter sight along re spective leading edges opposite tips Balsarite crystal clear liquid makes balsawood watertight times Monokote sags comes unglued its cause balsa drying out contracting pulling away Monokote Balsarite helps eliminate problem performs same Solarfilm nearly oth er covering makes iron-ons stick bet ter due deep wood penetration Coverite 2779 Philmont Ave Huntingdon Valley Pennsylvania 19006 p roduotviewp rod uctevgewprod uctrviewprod u Ctre o ie W 94 Model Aviation p oduoteviewp rod ootevewprod uct ,viewp rod octreview COX ENGINES COX/SANWA RIC SYSTEMS AIRTRONICS KITS C end catalog complete 525 E Warner Ave ama Ana CA 92702 HOBBIES
Edition: Model Aviation - 1977/02
Page Numbers: 40, 41, 42, 43, 93, 94
BABY WAKEFIELD never hear term anymore nutshell phrase did attract Coupe dl-liver other factor Maybe have given longing look Wakefield have stopped short after noticing seemingly complexity typical com petition model Coupe event offers perfect intro duction rubber competition ulti mately Wakefield Experience gained handling Coupe directly applicable larger models Construction meth ods trimming techniques pre-flight pro cedures air picking launch basically similar Coupe high-performance event Ten grams rubber 70-gram airframe requires good air produce 2-minute max Similarly 40-gram motor 190gram airframe Wakefield although somewhat favorable power loading needs good air make 180 seconds Coupe popularity suffered change 100 grams total weight few years ago Some avid competitors built new models new rules particularly Europe did quite well US modelers simply ballasted old models 100 grams mediocre success Coupe entries local contests dimin ished time low feared event would die Forces rallied cause however about two years ago rules changed back 80 grams all-up weight Contest entries during past year have proved wisdom change Coupe dHiver models have flown internationally generationthe perfect introduction competition rubber-power ultimately Wakefield Clarence Haught future Coupe assured can still get started enjoyable event will provide basic skills applicable rubber competition Que dCoupe deliberately designed employ common Wakefield construc tion techniques rolled-balsa tubular fuse lage laminated tips formed prop blades methods easy mas ter produce professional looking model Begin construction flying sur faces Prepare forms wing stab tips fit inside contours tips handy material ie balsa fir ply wood scrap lumber Form should ex tend inch beyond curve Glue-proof edge form rubbing crayon until well waxed Cut required number 1/32 balsa strips C-grain stock long enough form tips allow extra material handling Soak balsa strips warm water 10 minutes Remove strips blot excess water holding strip end around form pull free end around form secure rubberbands Prepare second strip coating side white glue apply over first strip same manner relocating rubberbands hold both strips Repeat until tip completed set aside dry overnight balance wing stab struc ture basic would suggest stacking 1/32 rib blanks between two cardstock templates carving sanding ribs once structures complete sanded apply two coats dope sanding after first coat cover Japanese tissue Water-shrink finish four coats dope wing two stabilizer Apply trim markings cut Japanese tissue second coat Use nitrate Sig Lite Coat dope hold down warping Locate some suitable molds form fuselage tubes length I-inch dowel will suffice motor tube bor rowed pool cue ideal tail boom Cut oversize blanks 4-inch-wide Agrain Sig calls tangent cut sheet balsa 1/16 motor tube 1/32 tail boom 4-inch stock unavail able may join narrower sheet edge edge epoxy cement Lay two pieces out overlapping edges joined about Trim both sheets si multaneously using razor blade straightedge Butt trimmed edges together bench join strip masking tape over seam Remove board fold 40 Model Aviation Opposite page clean Coupe Tubular fuseage rolled sheet balsa pylon satisfies cross-sectional requirement Ten grams rubber 70-gram frame requires good air produce 2-minute max flight Left Homemade winder adapted hand drill Counter frees mind concentrate flight prep wire prop hub takes curse Out prop making allows adjustment blades Below Rubberband provides positive power fold retracted blades wont affect turn Bot tom Prop blades power position ready launch Ship released climb groove nose up right wing slightly down open apply epoxy glue fold shut tape over seam Sand bevel along edge fuselage blanks shown plan Soak blanks water 10 minutes Remove wrap around forms allowing excess sheet overlap beveled edge Bind cloth ban dage allow dry overnight same time prepare 1/32 ply wood reinforcements Wrap soaked plywood around same mold simply roll up sufficient length wet plywood secure rubberband until dry Remove blanks forms cement seams supporting tubular sections -inch dowel gluing glue up fuselage tubes forming molds will have difficulty removing finished tube dry trim off excess sheet sand smooth Fit plywood nose reinforcement stall Make up motor peg reinforcement fuselage joiner install rear motor tube Drill -inch holes motor peg best drilled sharp ened piece -inch brass tubing electric drill Support motor tube short length dowel drilling Install /8-inch balsa bulkhead end fuselage joiner Fit rear boom cement place Sight down completed fuselage tube determine straightness fuselage perfect rotate until offset top mark fuselage top center reference Install rudder stab rest DT hard ware rear end Using protractor reference sand specified thrust angles nose Plug motor peg holes pour about 2 ounces thinned dope motor tube Cap end shake Pour excess dope out allow dry Repeat operation least time seal interior motor tube against rubber lube Dope outside fuselage two coats sanding between Cover tail boom Japanese tissue motor tube two layers silk layer Silron protection against blown motors FULL SIZE PLANS AVAILABLE PAGE 96 3/IA S LEADING EDGE TI 7JI9 I/3D GREET LAMINATE TIPS FROM 1/32 0 I/U STRIP PULL STAKES STRIPS AROOGS WOOLS FORM RUNS AlTO WRITE SLOE 5 LABS FOR WIGS 3 ABS FOR STAS I/H SO LEADIRG EDGE #HP1IIIIII~IIIIIII~ I/MR J2 TMAILIGS EDGE SHUT DOWEL KEYS VR GO ROTTOB SPAR I/IA GUSSETS F-S AF-2 D F-I DIHEDRAL DETAIL TRIB TAG STAB RIG IROFI/3tOF 3/32 WING BIBS ilIZ2z TIP PANEL B OF I/SD 2 0F3/35 MAIN PANEL AGE I/SD 3/32X 3/B TMAILING EDGE U i PAPEB CLIP WIRE STAB PLATFORM I/ID PLYWOOD Y FORM PROP BLADES DR GA CAN BOAR & RIND WITH GTRIP BARRAGE CORER MOTOR TUBE W1TH 2 LAYERS SBB OR LAYER SILNON Q TYPICAL FUSELAGE JOINT DETAIL BEVEL EDOE OF FUSELAGE BLANK SOAK B BIND TO FORM WITH STRIP BANDAGE WREN DRY REMOVE CEMENT SERB TRIM B GURU TYPICAL BLADE GECTIOBIS 1/4 DOWELFABRIC BERtI/B GBEET I2 1/2 IROBENCE TRIM BAER EDGE / APPROX PYLON LRCATION TO LIMIT FWDBLADE FOLD TWIGT ROB SHRE TO ATTAINCEMENT IN PROPER OLACK BLADE TGARELLBAND BOOR DRILL AT AG ANGLE54 ANGLE AT 5 BLADE 07KBTD BALANCE COMPLETED I/B BRAGG TUBESO BLADE BAEO I/IAMOOEL WITH ID GRAM RIND B SOLDERMOTOR INSTALLED L"~- I/IA MUSIC RUREI/IRO sszRINA FUSELAGE WITR SANDPAPER B GLIDE PYLOR RHER FORTR FOB 4"I/3D PLY REIN PREFORM WIRDINO 1100KBY SOAKING ROLLING B DECLINING WITH RUBBERF-S 1/1K MUSIC WIBEPROP STOP SCREWBAND GNTLL DRY 3/32 PLY 1/32 PLY Al BIND NLSOLDERRETAIN NOSE BLOCKI SPRING FROMWITH RUBBER BAND BALL POINT PENIA DIR EDBRASS TURK PAl MODEL SUPPLY BALL I/B GO SPRUCE KEY TANUST BEARING OR 2 PINE BOSE BLOCK OTEEL B BRASS WASHERS BASIC THRUST LINE ARAJSYSENTS 2 RIGHT 1 SOWN COAT INSIDE -OF MOTOR TUBE WITH DOPE I/3D PLY REINF ROLL PROM UHAIN INER I/B SHEET BALSA \ I/B SHEET BLOWN MOTGR BULK1ELD DoNT OMITI 1/4 ALlAH TUBE MOTOR PEG FIF-Z COWER TAIL BOON WITH JAPANESE TOSUE / j i--ROLL FROM BRAIN cTANGENT CUTI VSD GREET BALSA 0I534B6 5F-4 ALL PYLON PARTG 3D SHEET 3/32 SOFT SHEET SOFT BARK BilGES DT ANGLE 45 DORIJIPERTUBE IJPRPEBOJPWBIE DI LIT LWE Que Coupe II CRUR dHHNr BR CLARENCE RAUBIIT 1/16 GUSSETS Iv 140 I/H TOP SPARS NV \ I CENTOR 2 SF V52 OF 3/3D Que dCoupe Cut out pylon parts assemble pylon attach fuselage time wrap fuselage sandpaper slide pylon back forth attain perfect fit Cover pylon Japanese tissue stall wing hold down hooks streamlined pylon provides fuselage cross sectional area required rules Que dCoupe uses can-formed prop blades method construction pro vides good quality blades minimum time material expended feel prop important single com ponent rubber model formed prop blades allow unlimited experimenta tion diameters pitches blade shapes areas Cut rectangular blanks adequate size 1/8 medium sheet stock Soak blanks water 10 minutes bind both blanks either stacked side side approximately 6-inch diameter tin can blanks should canted 15 degrees left vertical provide necessary helical twist finished blade Allow dry thoroughly Drying can hastened baking oven 175 degrees wish Cut blades outline shape Sharpen -inch dowel pencil sharpener epoxy notch blade form hub Above Packing turns inexpensive winding stooge fabricated local welding shopwont flinch motor bursts Left Typical dethermalizer set-up Too much angle brings ship down too fast too little causes spinning45 degrees about right Use fire proof limit line Photos Tim Christie Sand blade airfoil section thinning blade toward tips Drill hole hub trying maintain much accuracy possible although angles specified approximate purpose angles allow blades fold properly against fuselage sides Final adjustments made bend ing wire hub Finish blades dope Apply rein forcing fabric hub areas small hooks provide power fold de sired small rubberband stretched tween hooks through winding loop hub will insure positive fold time Fabricate nose block shown bend wire parts specifications Bush nose block brass tubing stall prop shaft thrust bearing spring Bend 90-degree angle prop shaft bind hub winding 1oop prop shaft copper wire Solder securely Install prop blade hub retain -A wheel collars Trim dowel bears hub provide stop limit blade folding forward Twist wire continued page 93 February 1977 43 Que dCoupe/Haught continued page 43 hub provide proper angle 54 degrees prop shaft 5-inch blade station Check prop balance add weight sand heavy blade bring prop balance Determine proper location prop stop screw stop prop horizontal position tension oil shaft spring winding hook shown plans desirable accessory allows motor wound prop assembly practice prop assembly removed winder engaged directly winding hook After winding length music wire inserted tubing wind ing hook hold wound motor prop nose block assembly hooked procedure lessens possibility damage bursting motors during wind ing Always secure nose block retaining band jolt stopping prop can dislodge nose block disrupt ing flight trim major dilemma facing rubber fliers today difficulty obtaining quality rubber Pirelli long time standard no longer available its replacement Filati does measure up old Pirelli standards inconsistent batch batch old stocks understand Filati getting better samples have tested proved disappointing Some old stock Pirelli available want pay price quantitites limited reason recommend use something available order may become thoroughly familiar its characteristics model will need extensive retrimming new batch rubber leaves about two choices Sig FAI rubber sold Ed Dolby FAI Model Supply chose Dolby rubber takes fewer winds Pirelli has stronger initial burst good perform ance can obtained available 3/16 hs reasonably priced suggest start i/4 FAI rubber experiment other sizes brands model fully acquainted Prepare several motors cutting lengths weigh slightly under 10 grams Wash thoroughly remove talc lubri cate 50-50 mixture glycerine surgical jelly Just pour dab lube palm hand motor other rub vigorously thoroughly coat motor Tie ends together overhand knot pulled tight followed square knot snugged up Clip off short ends Break motors stretching five times length minute increasing stretch six times length another min ute finally releasing tension gradually during one-minute period can break four five motors time smooth door knob makes good anchor end short length -inch larger dowel works good handle end Loop motor six strands chor end solidly Hook winder other end Stretch motor out approxi mately 30 inches crank about 175 turns move slowly continuing wind count Wind until motor bursts note number turns Use figure guide winding flight Allow 5 percent safety margin word about winders just planning flying Coupe small shop egg beater type hand drill will just fine Obtain sturdy hook i/8 material hardware store have nut February 1977 93 flit P R 0 D U CT S N C DAVISVILLE ROAD OW GROVE PA 19090 659-3900 NOW. THE SUPER POWER TEAM Could Start Something Big SUPER/GEL. EXPRESSLY FOR MODEL USE Say goodby batteries really designed something else No need make anymore Super/Gel Fast Charge & Discharge Needed Models Sealed-in Gel No water no spill no leak MA Full 45 amp hours between recharges Long Life Recharge 500 TImes SULLIVAN CHARGER . GREAT TEAMMATE U UL Listed Plugs Ordinary House Current Fully Charges Battery 12 Hours 500 ma Output ideal New Battery Can Used Most Wet Cell Batteries Too hobby eno n FREE SAMPLE Pin Clamps Try em youll want Send ad selfaddressed stamped envelope ROCKET CITY SPECIALTIES 103 Wholesale Ave NE Huntsville Ala 35811 MA Que dCoupecontinued brazed threaded end prevent hook pulling out drill chuck Most drills have approximately 4-to-i gear ratios Determine what yours can convert winder handle turns motor turns plan graduate Wakefield and/or Unlimited buy ready made winder make heavy-duty hand drill Attach D-type handle remove chuck install permanent winding hook Que dCoupe flies right power right glide Prepare flight double checking surfaces alignment Rudder should 1/16 right Wing tab should down 1/16 Tips washed out 1/16 Stab should titled right side high CU thrust line shown plans slack out motor prop blades held folded position rubberband test glide shimming stab until smooth floating glide slight right turn obtained Put 100 hand turns motor launch right wind nose up slightly Observe carefully right moderate climbing turn indicates well looking dangerous traits time As long model does spiral dive right continue add power using winder ship spiral dives re duce right thrust increase wing tab down adjustment As increase power full winds cor rect climb turn angle thrust adjustments small sanding block flight kit handy Keep right wing up tab Adjust glide turn stab tilt glide angle slight CU shifts may fine tune flight trim small rudder tab stabilizer incidence adjustments Change motors other flight practicing flight competition Spinner/Spector continued page 49 Spinners design does away fin ickiness trying get gyro fly variety speeds simple expedient flying speed hows cheap trick uses four systematically related main functional design elements achieve provide stability speed 1 Constant speed rotor 2 Balance forces singular flight speed 3 Pendulum stability 4 Light weight controlled amount induced drag makes almost constant-speed rotor provides lift/drag vector tends stay put can balanced proper alignment prop thrust center gravity slipstream/rotor stream interaction rudder thrust Perturbations flying attitude quickly damped pendu lum action landing gear heavier plane less stable due inertial effects momentary gain/loss airspeed up/downwind turns launches too fast slow will fly much weight launch speed comes highly critical wind will upset Try yourself like add ing weight just rearward CU generate higher angle attack lift watch interesting variety crashes plane destabilizes what starts out smooth flight Construction will find model very quick make few procedures slightly differ ent convention should followed else wont work right balsa version uses North Pacifics 4-dia Skeeter prop bearing equivalent size same no heavier can com pensated bending landing gear aft wheels rubber Sleek Streak equivalent note rubber size fairly critical Select very light straight sheets 1/16 1/32 balsa no denser Skeeters wings used contest grade 1/32 blades soft rigid turned out slightly thicker 1/32 1/20 perfect cant get light wood youd best forget whole thing make plastic model instead can use Sleek Streak landing gear simply bend wheels forward out youll need 1/32 wire rotor shaft might well use make longer landing gear Fly kinds weather experiment rubber Try 3/16 8-strand motors etc Try put Coupe thermal max have some good articles thermals lately Check some RC glider columns Get rubber technique down pat start looking good Wakefield design its much stable Just follow bends original extend legs rotor-shaft bearing must metal nylon else will quickly wear out allow rotor disc tilt out specs indicated CG produces nice climb either real steep climb flat penetration use rearward forward CU building rotor mast respectively forward rearward aw fuselage fuselage mostly cosmetic can vary greatly shape provided same thrust rotor position CU used Build own favorite design uses parameters resulting about 30 hours flight testing fol lowing closely should definitely put ballpark Make rotor first Cut out blades glue together water-based glue wetting out side joint water Holding joint close heat source such heat gun twist negative pitch dihedral blades remember unpowered blades screw downward just glider points down rising thermal Use jig plans get angles exact sure blades straight along diameter sight along re spective leading edges opposite tips Balsarite crystal clear liquid makes balsawood watertight times Monokote sags comes unglued its cause balsa drying out contracting pulling away Monokote Balsarite helps eliminate problem performs same Solarfilm nearly oth er covering makes iron-ons stick bet ter due deep wood penetration Coverite 2779 Philmont Ave Huntingdon Valley Pennsylvania 19006 p roduotviewp rod uctevgewprod uctrviewprod u Ctre o ie W 94 Model Aviation p oduoteviewp rod ootevewprod uct ,viewp rod octreview COX ENGINES COX/SANWA RIC SYSTEMS AIRTRONICS KITS C end catalog complete 525 E Warner Ave ama Ana CA 92702 HOBBIES
Edition: Model Aviation - 1977/02
Page Numbers: 40, 41, 42, 43, 93, 94
BABY WAKEFIELD never hear term anymore nutshell phrase did attract Coupe dl-liver other factor Maybe have given longing look Wakefield have stopped short after noticing seemingly complexity typical com petition model Coupe event offers perfect intro duction rubber competition ulti mately Wakefield Experience gained handling Coupe directly applicable larger models Construction meth ods trimming techniques pre-flight pro cedures air picking launch basically similar Coupe high-performance event Ten grams rubber 70-gram airframe requires good air produce 2-minute max Similarly 40-gram motor 190gram airframe Wakefield although somewhat favorable power loading needs good air make 180 seconds Coupe popularity suffered change 100 grams total weight few years ago Some avid competitors built new models new rules particularly Europe did quite well US modelers simply ballasted old models 100 grams mediocre success Coupe entries local contests dimin ished time low feared event would die Forces rallied cause however about two years ago rules changed back 80 grams all-up weight Contest entries during past year have proved wisdom change Coupe dHiver models have flown internationally generationthe perfect introduction competition rubber-power ultimately Wakefield Clarence Haught future Coupe assured can still get started enjoyable event will provide basic skills applicable rubber competition Que dCoupe deliberately designed employ common Wakefield construc tion techniques rolled-balsa tubular fuse lage laminated tips formed prop blades methods easy mas ter produce professional looking model Begin construction flying sur faces Prepare forms wing stab tips fit inside contours tips handy material ie balsa fir ply wood scrap lumber Form should ex tend inch beyond curve Glue-proof edge form rubbing crayon until well waxed Cut required number 1/32 balsa strips C-grain stock long enough form tips allow extra material handling Soak balsa strips warm water 10 minutes Remove strips blot excess water holding strip end around form pull free end around form secure rubberbands Prepare second strip coating side white glue apply over first strip same manner relocating rubberbands hold both strips Repeat until tip completed set aside dry overnight balance wing stab struc ture basic would suggest stacking 1/32 rib blanks between two cardstock templates carving sanding ribs once structures complete sanded apply two coats dope sanding after first coat cover Japanese tissue Water-shrink finish four coats dope wing two stabilizer Apply trim markings cut Japanese tissue second coat Use nitrate Sig Lite Coat dope hold down warping Locate some suitable molds form fuselage tubes length I-inch dowel will suffice motor tube bor rowed pool cue ideal tail boom Cut oversize blanks 4-inch-wide Agrain Sig calls tangent cut sheet balsa 1/16 motor tube 1/32 tail boom 4-inch stock unavail able may join narrower sheet edge edge epoxy cement Lay two pieces out overlapping edges joined about Trim both sheets si multaneously using razor blade straightedge Butt trimmed edges together bench join strip masking tape over seam Remove board fold 40 Model Aviation Opposite page clean Coupe Tubular fuseage rolled sheet balsa pylon satisfies cross-sectional requirement Ten grams rubber 70-gram frame requires good air produce 2-minute max flight Left Homemade winder adapted hand drill Counter frees mind concentrate flight prep wire prop hub takes curse Out prop making allows adjustment blades Below Rubberband provides positive power fold retracted blades wont affect turn Bot tom Prop blades power position ready launch Ship released climb groove nose up right wing slightly down open apply epoxy glue fold shut tape over seam Sand bevel along edge fuselage blanks shown plan Soak blanks water 10 minutes Remove wrap around forms allowing excess sheet overlap beveled edge Bind cloth ban dage allow dry overnight same time prepare 1/32 ply wood reinforcements Wrap soaked plywood around same mold simply roll up sufficient length wet plywood secure rubberband until dry Remove blanks forms cement seams supporting tubular sections -inch dowel gluing glue up fuselage tubes forming molds will have difficulty removing finished tube dry trim off excess sheet sand smooth Fit plywood nose reinforcement stall Make up motor peg reinforcement fuselage joiner install rear motor tube Drill -inch holes motor peg best drilled sharp ened piece -inch brass tubing electric drill Support motor tube short length dowel drilling Install /8-inch balsa bulkhead end fuselage joiner Fit rear boom cement place Sight down completed fuselage tube determine straightness fuselage perfect rotate until offset top mark fuselage top center reference Install rudder stab rest DT hard ware rear end Using protractor reference sand specified thrust angles nose Plug motor peg holes pour about 2 ounces thinned dope motor tube Cap end shake Pour excess dope out allow dry Repeat operation least time seal interior motor tube against rubber lube Dope outside fuselage two coats sanding between Cover tail boom Japanese tissue motor tube two layers silk layer Silron protection against blown motors FULL SIZE PLANS AVAILABLE PAGE 96 3/IA S LEADING EDGE TI 7JI9 I/3D GREET LAMINATE TIPS FROM 1/32 0 I/U STRIP PULL STAKES STRIPS AROOGS WOOLS FORM RUNS AlTO WRITE SLOE 5 LABS FOR WIGS 3 ABS FOR STAS I/H SO LEADIRG EDGE #HP1IIIIII~IIIIIII~ I/MR J2 TMAILIGS EDGE SHUT DOWEL KEYS VR GO ROTTOB SPAR I/IA GUSSETS F-S AF-2 D F-I DIHEDRAL DETAIL TRIB TAG STAB RIG IROFI/3tOF 3/32 WING BIBS ilIZ2z TIP PANEL B OF I/SD 2 0F3/35 MAIN PANEL AGE I/SD 3/32X 3/B TMAILING EDGE U i PAPEB CLIP WIRE STAB PLATFORM I/ID PLYWOOD Y FORM PROP BLADES DR GA CAN BOAR & RIND WITH GTRIP BARRAGE CORER MOTOR TUBE W1TH 2 LAYERS SBB OR LAYER SILNON Q TYPICAL FUSELAGE JOINT DETAIL BEVEL EDOE OF FUSELAGE BLANK SOAK B BIND TO FORM WITH STRIP BANDAGE WREN DRY REMOVE CEMENT SERB TRIM B GURU TYPICAL BLADE GECTIOBIS 1/4 DOWELFABRIC BERtI/B GBEET I2 1/2 IROBENCE TRIM BAER EDGE / APPROX PYLON LRCATION TO LIMIT FWDBLADE FOLD TWIGT ROB SHRE TO ATTAINCEMENT IN PROPER OLACK BLADE TGARELLBAND BOOR DRILL AT AG ANGLE54 ANGLE AT 5 BLADE 07KBTD BALANCE COMPLETED I/B BRAGG TUBESO BLADE BAEO I/IAMOOEL WITH ID GRAM RIND B SOLDERMOTOR INSTALLED L"~- I/IA MUSIC RUREI/IRO sszRINA FUSELAGE WITR SANDPAPER B GLIDE PYLOR RHER FORTR FOB 4"I/3D PLY REIN PREFORM WIRDINO 1100KBY SOAKING ROLLING B DECLINING WITH RUBBERF-S 1/1K MUSIC WIBEPROP STOP SCREWBAND GNTLL DRY 3/32 PLY 1/32 PLY Al BIND NLSOLDERRETAIN NOSE BLOCKI SPRING FROMWITH RUBBER BAND BALL POINT PENIA DIR EDBRASS TURK PAl MODEL SUPPLY BALL I/B GO SPRUCE KEY TANUST BEARING OR 2 PINE BOSE BLOCK OTEEL B BRASS WASHERS BASIC THRUST LINE ARAJSYSENTS 2 RIGHT 1 SOWN COAT INSIDE -OF MOTOR TUBE WITH DOPE I/3D PLY REINF ROLL PROM UHAIN INER I/B SHEET BALSA \ I/B SHEET BLOWN MOTGR BULK1ELD DoNT OMITI 1/4 ALlAH TUBE MOTOR PEG FIF-Z COWER TAIL BOON WITH JAPANESE TOSUE / j i--ROLL FROM BRAIN cTANGENT CUTI VSD GREET BALSA 0I534B6 5F-4 ALL PYLON PARTG 3D SHEET 3/32 SOFT SHEET SOFT BARK BilGES DT ANGLE 45 DORIJIPERTUBE IJPRPEBOJPWBIE DI LIT LWE Que Coupe II CRUR dHHNr BR CLARENCE RAUBIIT 1/16 GUSSETS Iv 140 I/H TOP SPARS NV \ I CENTOR 2 SF V52 OF 3/3D Que dCoupe Cut out pylon parts assemble pylon attach fuselage time wrap fuselage sandpaper slide pylon back forth attain perfect fit Cover pylon Japanese tissue stall wing hold down hooks streamlined pylon provides fuselage cross sectional area required rules Que dCoupe uses can-formed prop blades method construction pro vides good quality blades minimum time material expended feel prop important single com ponent rubber model formed prop blades allow unlimited experimenta tion diameters pitches blade shapes areas Cut rectangular blanks adequate size 1/8 medium sheet stock Soak blanks water 10 minutes bind both blanks either stacked side side approximately 6-inch diameter tin can blanks should canted 15 degrees left vertical provide necessary helical twist finished blade Allow dry thoroughly Drying can hastened baking oven 175 degrees wish Cut blades outline shape Sharpen -inch dowel pencil sharpener epoxy notch blade form hub Above Packing turns inexpensive winding stooge fabricated local welding shopwont flinch motor bursts Left Typical dethermalizer set-up Too much angle brings ship down too fast too little causes spinning45 degrees about right Use fire proof limit line Photos Tim Christie Sand blade airfoil section thinning blade toward tips Drill hole hub trying maintain much accuracy possible although angles specified approximate purpose angles allow blades fold properly against fuselage sides Final adjustments made bend ing wire hub Finish blades dope Apply rein forcing fabric hub areas small hooks provide power fold de sired small rubberband stretched tween hooks through winding loop hub will insure positive fold time Fabricate nose block shown bend wire parts specifications Bush nose block brass tubing stall prop shaft thrust bearing spring Bend 90-degree angle prop shaft bind hub winding 1oop prop shaft copper wire Solder securely Install prop blade hub retain -A wheel collars Trim dowel bears hub provide stop limit blade folding forward Twist wire continued page 93 February 1977 43 Que dCoupe/Haught continued page 43 hub provide proper angle 54 degrees prop shaft 5-inch blade station Check prop balance add weight sand heavy blade bring prop balance Determine proper location prop stop screw stop prop horizontal position tension oil shaft spring winding hook shown plans desirable accessory allows motor wound prop assembly practice prop assembly removed winder engaged directly winding hook After winding length music wire inserted tubing wind ing hook hold wound motor prop nose block assembly hooked procedure lessens possibility damage bursting motors during wind ing Always secure nose block retaining band jolt stopping prop can dislodge nose block disrupt ing flight trim major dilemma facing rubber fliers today difficulty obtaining quality rubber Pirelli long time standard no longer available its replacement Filati does measure up old Pirelli standards inconsistent batch batch old stocks understand Filati getting better samples have tested proved disappointing Some old stock Pirelli available want pay price quantitites limited reason recommend use something available order may become thoroughly familiar its characteristics model will need extensive retrimming new batch rubber leaves about two choices Sig FAI rubber sold Ed Dolby FAI Model Supply chose Dolby rubber takes fewer winds Pirelli has stronger initial burst good perform ance can obtained available 3/16 hs reasonably priced suggest start i/4 FAI rubber experiment other sizes brands model fully acquainted Prepare several motors cutting lengths weigh slightly under 10 grams Wash thoroughly remove talc lubri cate 50-50 mixture glycerine surgical jelly Just pour dab lube palm hand motor other rub vigorously thoroughly coat motor Tie ends together overhand knot pulled tight followed square knot snugged up Clip off short ends Break motors stretching five times length minute increasing stretch six times length another min ute finally releasing tension gradually during one-minute period can break four five motors time smooth door knob makes good anchor end short length -inch larger dowel works good handle end Loop motor six strands chor end solidly Hook winder other end Stretch motor out approxi mately 30 inches crank about 175 turns move slowly continuing wind count Wind until motor bursts note number turns Use figure guide winding flight Allow 5 percent safety margin word about winders just planning flying Coupe small shop egg beater type hand drill will just fine Obtain sturdy hook i/8 material hardware store have nut February 1977 93 flit P R 0 D U CT S N C DAVISVILLE ROAD OW GROVE PA 19090 659-3900 NOW. THE SUPER POWER TEAM Could Start Something Big SUPER/GEL. EXPRESSLY FOR MODEL USE Say goodby batteries really designed something else No need make anymore Super/Gel Fast Charge & Discharge Needed Models Sealed-in Gel No water no spill no leak MA Full 45 amp hours between recharges Long Life Recharge 500 TImes SULLIVAN CHARGER . GREAT TEAMMATE U UL Listed Plugs Ordinary House Current Fully Charges Battery 12 Hours 500 ma Output ideal New Battery Can Used Most Wet Cell Batteries Too hobby eno n FREE SAMPLE Pin Clamps Try em youll want Send ad selfaddressed stamped envelope ROCKET CITY SPECIALTIES 103 Wholesale Ave NE Huntsville Ala 35811 MA Que dCoupecontinued brazed threaded end prevent hook pulling out drill chuck Most drills have approximately 4-to-i gear ratios Determine what yours can convert winder handle turns motor turns plan graduate Wakefield and/or Unlimited buy ready made winder make heavy-duty hand drill Attach D-type handle remove chuck install permanent winding hook Que dCoupe flies right power right glide Prepare flight double checking surfaces alignment Rudder should 1/16 right Wing tab should down 1/16 Tips washed out 1/16 Stab should titled right side high CU thrust line shown plans slack out motor prop blades held folded position rubberband test glide shimming stab until smooth floating glide slight right turn obtained Put 100 hand turns motor launch right wind nose up slightly Observe carefully right moderate climbing turn indicates well looking dangerous traits time As long model does spiral dive right continue add power using winder ship spiral dives re duce right thrust increase wing tab down adjustment As increase power full winds cor rect climb turn angle thrust adjustments small sanding block flight kit handy Keep right wing up tab Adjust glide turn stab tilt glide angle slight CU shifts may fine tune flight trim small rudder tab stabilizer incidence adjustments Change motors other flight practicing flight competition Spinner/Spector continued page 49 Spinners design does away fin ickiness trying get gyro fly variety speeds simple expedient flying speed hows cheap trick uses four systematically related main functional design elements achieve provide stability speed 1 Constant speed rotor 2 Balance forces singular flight speed 3 Pendulum stability 4 Light weight controlled amount induced drag makes almost constant-speed rotor provides lift/drag vector tends stay put can balanced proper alignment prop thrust center gravity slipstream/rotor stream interaction rudder thrust Perturbations flying attitude quickly damped pendu lum action landing gear heavier plane less stable due inertial effects momentary gain/loss airspeed up/downwind turns launches too fast slow will fly much weight launch speed comes highly critical wind will upset Try yourself like add ing weight just rearward CU generate higher angle attack lift watch interesting variety crashes plane destabilizes what starts out smooth flight Construction will find model very quick make few procedures slightly differ ent convention should followed else wont work right balsa version uses North Pacifics 4-dia Skeeter prop bearing equivalent size same no heavier can com pensated bending landing gear aft wheels rubber Sleek Streak equivalent note rubber size fairly critical Select very light straight sheets 1/16 1/32 balsa no denser Skeeters wings used contest grade 1/32 blades soft rigid turned out slightly thicker 1/32 1/20 perfect cant get light wood youd best forget whole thing make plastic model instead can use Sleek Streak landing gear simply bend wheels forward out youll need 1/32 wire rotor shaft might well use make longer landing gear Fly kinds weather experiment rubber Try 3/16 8-strand motors etc Try put Coupe thermal max have some good articles thermals lately Check some RC glider columns Get rubber technique down pat start looking good Wakefield design its much stable Just follow bends original extend legs rotor-shaft bearing must metal nylon else will quickly wear out allow rotor disc tilt out specs indicated CG produces nice climb either real steep climb flat penetration use rearward forward CU building rotor mast respectively forward rearward aw fuselage fuselage mostly cosmetic can vary greatly shape provided same thrust rotor position CU used Build own favorite design uses parameters resulting about 30 hours flight testing fol lowing closely should definitely put ballpark Make rotor first Cut out blades glue together water-based glue wetting out side joint water Holding joint close heat source such heat gun twist negative pitch dihedral blades remember unpowered blades screw downward just glider points down rising thermal Use jig plans get angles exact sure blades straight along diameter sight along re spective leading edges opposite tips Balsarite crystal clear liquid makes balsawood watertight times Monokote sags comes unglued its cause balsa drying out contracting pulling away Monokote Balsarite helps eliminate problem performs same Solarfilm nearly oth er covering makes iron-ons stick bet ter due deep wood penetration Coverite 2779 Philmont Ave Huntingdon Valley Pennsylvania 19006 p roduotviewp rod uctevgewprod uctrviewprod u Ctre o ie W 94 Model Aviation p oduoteviewp rod ootevewprod uct ,viewp rod octreview COX ENGINES COX/SANWA RIC SYSTEMS AIRTRONICS KITS C end catalog complete 525 E Warner Ave ama Ana CA 92702 HOBBIES
Edition: Model Aviation - 1977/02
Page Numbers: 40, 41, 42, 43, 93, 94
BABY WAKEFIELD never hear term anymore nutshell phrase did attract Coupe dl-liver other factor Maybe have given longing look Wakefield have stopped short after noticing seemingly complexity typical com petition model Coupe event offers perfect intro duction rubber competition ulti mately Wakefield Experience gained handling Coupe directly applicable larger models Construction meth ods trimming techniques pre-flight pro cedures air picking launch basically similar Coupe high-performance event Ten grams rubber 70-gram airframe requires good air produce 2-minute max Similarly 40-gram motor 190gram airframe Wakefield although somewhat favorable power loading needs good air make 180 seconds Coupe popularity suffered change 100 grams total weight few years ago Some avid competitors built new models new rules particularly Europe did quite well US modelers simply ballasted old models 100 grams mediocre success Coupe entries local contests dimin ished time low feared event would die Forces rallied cause however about two years ago rules changed back 80 grams all-up weight Contest entries during past year have proved wisdom change Coupe dHiver models have flown internationally generationthe perfect introduction competition rubber-power ultimately Wakefield Clarence Haught future Coupe assured can still get started enjoyable event will provide basic skills applicable rubber competition Que dCoupe deliberately designed employ common Wakefield construc tion techniques rolled-balsa tubular fuse lage laminated tips formed prop blades methods easy mas ter produce professional looking model Begin construction flying sur faces Prepare forms wing stab tips fit inside contours tips handy material ie balsa fir ply wood scrap lumber Form should ex tend inch beyond curve Glue-proof edge form rubbing crayon until well waxed Cut required number 1/32 balsa strips C-grain stock long enough form tips allow extra material handling Soak balsa strips warm water 10 minutes Remove strips blot excess water holding strip end around form pull free end around form secure rubberbands Prepare second strip coating side white glue apply over first strip same manner relocating rubberbands hold both strips Repeat until tip completed set aside dry overnight balance wing stab struc ture basic would suggest stacking 1/32 rib blanks between two cardstock templates carving sanding ribs once structures complete sanded apply two coats dope sanding after first coat cover Japanese tissue Water-shrink finish four coats dope wing two stabilizer Apply trim markings cut Japanese tissue second coat Use nitrate Sig Lite Coat dope hold down warping Locate some suitable molds form fuselage tubes length I-inch dowel will suffice motor tube bor rowed pool cue ideal tail boom Cut oversize blanks 4-inch-wide Agrain Sig calls tangent cut sheet balsa 1/16 motor tube 1/32 tail boom 4-inch stock unavail able may join narrower sheet edge edge epoxy cement Lay two pieces out overlapping edges joined about Trim both sheets si multaneously using razor blade straightedge Butt trimmed edges together bench join strip masking tape over seam Remove board fold 40 Model Aviation Opposite page clean Coupe Tubular fuseage rolled sheet balsa pylon satisfies cross-sectional requirement Ten grams rubber 70-gram frame requires good air produce 2-minute max flight Left Homemade winder adapted hand drill Counter frees mind concentrate flight prep wire prop hub takes curse Out prop making allows adjustment blades Below Rubberband provides positive power fold retracted blades wont affect turn Bot tom Prop blades power position ready launch Ship released climb groove nose up right wing slightly down open apply epoxy glue fold shut tape over seam Sand bevel along edge fuselage blanks shown plan Soak blanks water 10 minutes Remove wrap around forms allowing excess sheet overlap beveled edge Bind cloth ban dage allow dry overnight same time prepare 1/32 ply wood reinforcements Wrap soaked plywood around same mold simply roll up sufficient length wet plywood secure rubberband until dry Remove blanks forms cement seams supporting tubular sections -inch dowel gluing glue up fuselage tubes forming molds will have difficulty removing finished tube dry trim off excess sheet sand smooth Fit plywood nose reinforcement stall Make up motor peg reinforcement fuselage joiner install rear motor tube Drill -inch holes motor peg best drilled sharp ened piece -inch brass tubing electric drill Support motor tube short length dowel drilling Install /8-inch balsa bulkhead end fuselage joiner Fit rear boom cement place Sight down completed fuselage tube determine straightness fuselage perfect rotate until offset top mark fuselage top center reference Install rudder stab rest DT hard ware rear end Using protractor reference sand specified thrust angles nose Plug motor peg holes pour about 2 ounces thinned dope motor tube Cap end shake Pour excess dope out allow dry Repeat operation least time seal interior motor tube against rubber lube Dope outside fuselage two coats sanding between Cover tail boom Japanese tissue motor tube two layers silk layer Silron protection against blown motors FULL SIZE PLANS AVAILABLE PAGE 96 3/IA S LEADING EDGE TI 7JI9 I/3D GREET LAMINATE TIPS FROM 1/32 0 I/U STRIP PULL STAKES STRIPS AROOGS WOOLS FORM RUNS AlTO WRITE SLOE 5 LABS FOR WIGS 3 ABS FOR STAS I/H SO LEADIRG EDGE #HP1IIIIII~IIIIIII~ I/MR J2 TMAILIGS EDGE SHUT DOWEL KEYS VR GO ROTTOB SPAR I/IA GUSSETS F-S AF-2 D F-I DIHEDRAL DETAIL TRIB TAG STAB RIG IROFI/3tOF 3/32 WING BIBS ilIZ2z TIP PANEL B OF I/SD 2 0F3/35 MAIN PANEL AGE I/SD 3/32X 3/B TMAILING EDGE U i PAPEB CLIP WIRE STAB PLATFORM I/ID PLYWOOD Y FORM PROP BLADES DR GA CAN BOAR & RIND WITH GTRIP BARRAGE CORER MOTOR TUBE W1TH 2 LAYERS SBB OR LAYER SILNON Q TYPICAL FUSELAGE JOINT DETAIL BEVEL EDOE OF FUSELAGE BLANK SOAK B BIND TO FORM WITH STRIP BANDAGE WREN DRY REMOVE CEMENT SERB TRIM B GURU TYPICAL BLADE GECTIOBIS 1/4 DOWELFABRIC BERtI/B GBEET I2 1/2 IROBENCE TRIM BAER EDGE / APPROX PYLON LRCATION TO LIMIT FWDBLADE FOLD TWIGT ROB SHRE TO ATTAINCEMENT IN PROPER OLACK BLADE TGARELLBAND BOOR DRILL AT AG ANGLE54 ANGLE AT 5 BLADE 07KBTD BALANCE COMPLETED I/B BRAGG TUBESO BLADE BAEO I/IAMOOEL WITH ID GRAM RIND B SOLDERMOTOR INSTALLED L"~- I/IA MUSIC RUREI/IRO sszRINA FUSELAGE WITR SANDPAPER B GLIDE PYLOR RHER FORTR FOB 4"I/3D PLY REIN PREFORM WIRDINO 1100KBY SOAKING ROLLING B DECLINING WITH RUBBERF-S 1/1K MUSIC WIBEPROP STOP SCREWBAND GNTLL DRY 3/32 PLY 1/32 PLY Al BIND NLSOLDERRETAIN NOSE BLOCKI SPRING FROMWITH RUBBER BAND BALL POINT PENIA DIR EDBRASS TURK PAl MODEL SUPPLY BALL I/B GO SPRUCE KEY TANUST BEARING OR 2 PINE BOSE BLOCK OTEEL B BRASS WASHERS BASIC THRUST LINE ARAJSYSENTS 2 RIGHT 1 SOWN COAT INSIDE -OF MOTOR TUBE WITH DOPE I/3D PLY REINF ROLL PROM UHAIN INER I/B SHEET BALSA \ I/B SHEET BLOWN MOTGR BULK1ELD DoNT OMITI 1/4 ALlAH TUBE MOTOR PEG FIF-Z COWER TAIL BOON WITH JAPANESE TOSUE / j i--ROLL FROM BRAIN cTANGENT CUTI VSD GREET BALSA 0I534B6 5F-4 ALL PYLON PARTG 3D SHEET 3/32 SOFT SHEET SOFT BARK BilGES DT ANGLE 45 DORIJIPERTUBE IJPRPEBOJPWBIE DI LIT LWE Que Coupe II CRUR dHHNr BR CLARENCE RAUBIIT 1/16 GUSSETS Iv 140 I/H TOP SPARS NV \ I CENTOR 2 SF V52 OF 3/3D Que dCoupe Cut out pylon parts assemble pylon attach fuselage time wrap fuselage sandpaper slide pylon back forth attain perfect fit Cover pylon Japanese tissue stall wing hold down hooks streamlined pylon provides fuselage cross sectional area required rules Que dCoupe uses can-formed prop blades method construction pro vides good quality blades minimum time material expended feel prop important single com ponent rubber model formed prop blades allow unlimited experimenta tion diameters pitches blade shapes areas Cut rectangular blanks adequate size 1/8 medium sheet stock Soak blanks water 10 minutes bind both blanks either stacked side side approximately 6-inch diameter tin can blanks should canted 15 degrees left vertical provide necessary helical twist finished blade Allow dry thoroughly Drying can hastened baking oven 175 degrees wish Cut blades outline shape Sharpen -inch dowel pencil sharpener epoxy notch blade form hub Above Packing turns inexpensive winding stooge fabricated local welding shopwont flinch motor bursts Left Typical dethermalizer set-up Too much angle brings ship down too fast too little causes spinning45 degrees about right Use fire proof limit line Photos Tim Christie Sand blade airfoil section thinning blade toward tips Drill hole hub trying maintain much accuracy possible although angles specified approximate purpose angles allow blades fold properly against fuselage sides Final adjustments made bend ing wire hub Finish blades dope Apply rein forcing fabric hub areas small hooks provide power fold de sired small rubberband stretched tween hooks through winding loop hub will insure positive fold time Fabricate nose block shown bend wire parts specifications Bush nose block brass tubing stall prop shaft thrust bearing spring Bend 90-degree angle prop shaft bind hub winding 1oop prop shaft copper wire Solder securely Install prop blade hub retain -A wheel collars Trim dowel bears hub provide stop limit blade folding forward Twist wire continued page 93 February 1977 43 Que dCoupe/Haught continued page 43 hub provide proper angle 54 degrees prop shaft 5-inch blade station Check prop balance add weight sand heavy blade bring prop balance Determine proper location prop stop screw stop prop horizontal position tension oil shaft spring winding hook shown plans desirable accessory allows motor wound prop assembly practice prop assembly removed winder engaged directly winding hook After winding length music wire inserted tubing wind ing hook hold wound motor prop nose block assembly hooked procedure lessens possibility damage bursting motors during wind ing Always secure nose block retaining band jolt stopping prop can dislodge nose block disrupt ing flight trim major dilemma facing rubber fliers today difficulty obtaining quality rubber Pirelli long time standard no longer available its replacement Filati does measure up old Pirelli standards inconsistent batch batch old stocks understand Filati getting better samples have tested proved disappointing Some old stock Pirelli available want pay price quantitites limited reason recommend use something available order may become thoroughly familiar its characteristics model will need extensive retrimming new batch rubber leaves about two choices Sig FAI rubber sold Ed Dolby FAI Model Supply chose Dolby rubber takes fewer winds Pirelli has stronger initial burst good perform ance can obtained available 3/16 hs reasonably priced suggest start i/4 FAI rubber experiment other sizes brands model fully acquainted Prepare several motors cutting lengths weigh slightly under 10 grams Wash thoroughly remove talc lubri cate 50-50 mixture glycerine surgical jelly Just pour dab lube palm hand motor other rub vigorously thoroughly coat motor Tie ends together overhand knot pulled tight followed square knot snugged up Clip off short ends Break motors stretching five times length minute increasing stretch six times length another min ute finally releasing tension gradually during one-minute period can break four five motors time smooth door knob makes good anchor end short length -inch larger dowel works good handle end Loop motor six strands chor end solidly Hook winder other end Stretch motor out approxi mately 30 inches crank about 175 turns move slowly continuing wind count Wind until motor bursts note number turns Use figure guide winding flight Allow 5 percent safety margin word about winders just planning flying Coupe small shop egg beater type hand drill will just fine Obtain sturdy hook i/8 material hardware store have nut February 1977 93 flit P R 0 D U CT S N C DAVISVILLE ROAD OW GROVE PA 19090 659-3900 NOW. THE SUPER POWER TEAM Could Start Something Big SUPER/GEL. EXPRESSLY FOR MODEL USE Say goodby batteries really designed something else No need make anymore Super/Gel Fast Charge & Discharge Needed Models Sealed-in Gel No water no spill no leak MA Full 45 amp hours between recharges Long Life Recharge 500 TImes SULLIVAN CHARGER . GREAT TEAMMATE U UL Listed Plugs Ordinary House Current Fully Charges Battery 12 Hours 500 ma Output ideal New Battery Can Used Most Wet Cell Batteries Too hobby eno n FREE SAMPLE Pin Clamps Try em youll want Send ad selfaddressed stamped envelope ROCKET CITY SPECIALTIES 103 Wholesale Ave NE Huntsville Ala 35811 MA Que dCoupecontinued brazed threaded end prevent hook pulling out drill chuck Most drills have approximately 4-to-i gear ratios Determine what yours can convert winder handle turns motor turns plan graduate Wakefield and/or Unlimited buy ready made winder make heavy-duty hand drill Attach D-type handle remove chuck install permanent winding hook Que dCoupe flies right power right glide Prepare flight double checking surfaces alignment Rudder should 1/16 right Wing tab should down 1/16 Tips washed out 1/16 Stab should titled right side high CU thrust line shown plans slack out motor prop blades held folded position rubberband test glide shimming stab until smooth floating glide slight right turn obtained Put 100 hand turns motor launch right wind nose up slightly Observe carefully right moderate climbing turn indicates well looking dangerous traits time As long model does spiral dive right continue add power using winder ship spiral dives re duce right thrust increase wing tab down adjustment As increase power full winds cor rect climb turn angle thrust adjustments small sanding block flight kit handy Keep right wing up tab Adjust glide turn stab tilt glide angle slight CU shifts may fine tune flight trim small rudder tab stabilizer incidence adjustments Change motors other flight practicing flight competition Spinner/Spector continued page 49 Spinners design does away fin ickiness trying get gyro fly variety speeds simple expedient flying speed hows cheap trick uses four systematically related main functional design elements achieve provide stability speed 1 Constant speed rotor 2 Balance forces singular flight speed 3 Pendulum stability 4 Light weight controlled amount induced drag makes almost constant-speed rotor provides lift/drag vector tends stay put can balanced proper alignment prop thrust center gravity slipstream/rotor stream interaction rudder thrust Perturbations flying attitude quickly damped pendu lum action landing gear heavier plane less stable due inertial effects momentary gain/loss airspeed up/downwind turns launches too fast slow will fly much weight launch speed comes highly critical wind will upset Try yourself like add ing weight just rearward CU generate higher angle attack lift watch interesting variety crashes plane destabilizes what starts out smooth flight Construction will find model very quick make few procedures slightly differ ent convention should followed else wont work right balsa version uses North Pacifics 4-dia Skeeter prop bearing equivalent size same no heavier can com pensated bending landing gear aft wheels rubber Sleek Streak equivalent note rubber size fairly critical Select very light straight sheets 1/16 1/32 balsa no denser Skeeters wings used contest grade 1/32 blades soft rigid turned out slightly thicker 1/32 1/20 perfect cant get light wood youd best forget whole thing make plastic model instead can use Sleek Streak landing gear simply bend wheels forward out youll need 1/32 wire rotor shaft might well use make longer landing gear Fly kinds weather experiment rubber Try 3/16 8-strand motors etc Try put Coupe thermal max have some good articles thermals lately Check some RC glider columns Get rubber technique down pat start looking good Wakefield design its much stable Just follow bends original extend legs rotor-shaft bearing must metal nylon else will quickly wear out allow rotor disc tilt out specs indicated CG produces nice climb either real steep climb flat penetration use rearward forward CU building rotor mast respectively forward rearward aw fuselage fuselage mostly cosmetic can vary greatly shape provided same thrust rotor position CU used Build own favorite design uses parameters resulting about 30 hours flight testing fol lowing closely should definitely put ballpark Make rotor first Cut out blades glue together water-based glue wetting out side joint water Holding joint close heat source such heat gun twist negative pitch dihedral blades remember unpowered blades screw downward just glider points down rising thermal Use jig plans get angles exact sure blades straight along diameter sight along re spective leading edges opposite tips Balsarite crystal clear liquid makes balsawood watertight times Monokote sags comes unglued its cause balsa drying out contracting pulling away Monokote Balsarite helps eliminate problem performs same Solarfilm nearly oth er covering makes iron-ons stick bet ter due deep wood penetration Coverite 2779 Philmont Ave Huntingdon Valley Pennsylvania 19006 p roduotviewp rod uctevgewprod uctrviewprod u Ctre o ie W 94 Model Aviation p oduoteviewp rod ootevewprod uct ,viewp rod octreview COX ENGINES COX/SANWA RIC SYSTEMS AIRTRONICS KITS C end catalog complete 525 E Warner Ave ama Ana CA 92702 HOBBIES
Edition: Model Aviation - 1977/02
Page Numbers: 40, 41, 42, 43, 93, 94
BABY WAKEFIELD never hear term anymore nutshell phrase did attract Coupe dl-liver other factor Maybe have given longing look Wakefield have stopped short after noticing seemingly complexity typical com petition model Coupe event offers perfect intro duction rubber competition ulti mately Wakefield Experience gained handling Coupe directly applicable larger models Construction meth ods trimming techniques pre-flight pro cedures air picking launch basically similar Coupe high-performance event Ten grams rubber 70-gram airframe requires good air produce 2-minute max Similarly 40-gram motor 190gram airframe Wakefield although somewhat favorable power loading needs good air make 180 seconds Coupe popularity suffered change 100 grams total weight few years ago Some avid competitors built new models new rules particularly Europe did quite well US modelers simply ballasted old models 100 grams mediocre success Coupe entries local contests dimin ished time low feared event would die Forces rallied cause however about two years ago rules changed back 80 grams all-up weight Contest entries during past year have proved wisdom change Coupe dHiver models have flown internationally generationthe perfect introduction competition rubber-power ultimately Wakefield Clarence Haught future Coupe assured can still get started enjoyable event will provide basic skills applicable rubber competition Que dCoupe deliberately designed employ common Wakefield construc tion techniques rolled-balsa tubular fuse lage laminated tips formed prop blades methods easy mas ter produce professional looking model Begin construction flying sur faces Prepare forms wing stab tips fit inside contours tips handy material ie balsa fir ply wood scrap lumber Form should ex tend inch beyond curve Glue-proof edge form rubbing crayon until well waxed Cut required number 1/32 balsa strips C-grain stock long enough form tips allow extra material handling Soak balsa strips warm water 10 minutes Remove strips blot excess water holding strip end around form pull free end around form secure rubberbands Prepare second strip coating side white glue apply over first strip same manner relocating rubberbands hold both strips Repeat until tip completed set aside dry overnight balance wing stab struc ture basic would suggest stacking 1/32 rib blanks between two cardstock templates carving sanding ribs once structures complete sanded apply two coats dope sanding after first coat cover Japanese tissue Water-shrink finish four coats dope wing two stabilizer Apply trim markings cut Japanese tissue second coat Use nitrate Sig Lite Coat dope hold down warping Locate some suitable molds form fuselage tubes length I-inch dowel will suffice motor tube bor rowed pool cue ideal tail boom Cut oversize blanks 4-inch-wide Agrain Sig calls tangent cut sheet balsa 1/16 motor tube 1/32 tail boom 4-inch stock unavail able may join narrower sheet edge edge epoxy cement Lay two pieces out overlapping edges joined about Trim both sheets si multaneously using razor blade straightedge Butt trimmed edges together bench join strip masking tape over seam Remove board fold 40 Model Aviation Opposite page clean Coupe Tubular fuseage rolled sheet balsa pylon satisfies cross-sectional requirement Ten grams rubber 70-gram frame requires good air produce 2-minute max flight Left Homemade winder adapted hand drill Counter frees mind concentrate flight prep wire prop hub takes curse Out prop making allows adjustment blades Below Rubberband provides positive power fold retracted blades wont affect turn Bot tom Prop blades power position ready launch Ship released climb groove nose up right wing slightly down open apply epoxy glue fold shut tape over seam Sand bevel along edge fuselage blanks shown plan Soak blanks water 10 minutes Remove wrap around forms allowing excess sheet overlap beveled edge Bind cloth ban dage allow dry overnight same time prepare 1/32 ply wood reinforcements Wrap soaked plywood around same mold simply roll up sufficient length wet plywood secure rubberband until dry Remove blanks forms cement seams supporting tubular sections -inch dowel gluing glue up fuselage tubes forming molds will have difficulty removing finished tube dry trim off excess sheet sand smooth Fit plywood nose reinforcement stall Make up motor peg reinforcement fuselage joiner install rear motor tube Drill -inch holes motor peg best drilled sharp ened piece -inch brass tubing electric drill Support motor tube short length dowel drilling Install /8-inch balsa bulkhead end fuselage joiner Fit rear boom cement place Sight down completed fuselage tube determine straightness fuselage perfect rotate until offset top mark fuselage top center reference Install rudder stab rest DT hard ware rear end Using protractor reference sand specified thrust angles nose Plug motor peg holes pour about 2 ounces thinned dope motor tube Cap end shake Pour excess dope out allow dry Repeat operation least time seal interior motor tube against rubber lube Dope outside fuselage two coats sanding between Cover tail boom Japanese tissue motor tube two layers silk layer Silron protection against blown motors FULL SIZE PLANS AVAILABLE PAGE 96 3/IA S LEADING EDGE TI 7JI9 I/3D GREET LAMINATE TIPS FROM 1/32 0 I/U STRIP PULL STAKES STRIPS AROOGS WOOLS FORM RUNS AlTO WRITE SLOE 5 LABS FOR WIGS 3 ABS FOR STAS I/H SO LEADIRG EDGE #HP1IIIIII~IIIIIII~ I/MR J2 TMAILIGS EDGE SHUT DOWEL KEYS VR GO ROTTOB SPAR I/IA GUSSETS F-S AF-2 D F-I DIHEDRAL DETAIL TRIB TAG STAB RIG IROFI/3tOF 3/32 WING BIBS ilIZ2z TIP PANEL B OF I/SD 2 0F3/35 MAIN PANEL AGE I/SD 3/32X 3/B TMAILING EDGE U i PAPEB CLIP WIRE STAB PLATFORM I/ID PLYWOOD Y FORM PROP BLADES DR GA CAN BOAR & RIND WITH GTRIP BARRAGE CORER MOTOR TUBE W1TH 2 LAYERS SBB OR LAYER SILNON Q TYPICAL FUSELAGE JOINT DETAIL BEVEL EDOE OF FUSELAGE BLANK SOAK B BIND TO FORM WITH STRIP BANDAGE WREN DRY REMOVE CEMENT SERB TRIM B GURU TYPICAL BLADE GECTIOBIS 1/4 DOWELFABRIC BERtI/B GBEET I2 1/2 IROBENCE TRIM BAER EDGE / APPROX PYLON LRCATION TO LIMIT FWDBLADE FOLD TWIGT ROB SHRE TO ATTAINCEMENT IN PROPER OLACK BLADE TGARELLBAND BOOR DRILL AT AG ANGLE54 ANGLE AT 5 BLADE 07KBTD BALANCE COMPLETED I/B BRAGG TUBESO BLADE BAEO I/IAMOOEL WITH ID GRAM RIND B SOLDERMOTOR INSTALLED L"~- I/IA MUSIC RUREI/IRO sszRINA FUSELAGE WITR SANDPAPER B GLIDE PYLOR RHER FORTR FOB 4"I/3D PLY REIN PREFORM WIRDINO 1100KBY SOAKING ROLLING B DECLINING WITH RUBBERF-S 1/1K MUSIC WIBEPROP STOP SCREWBAND GNTLL DRY 3/32 PLY 1/32 PLY Al BIND NLSOLDERRETAIN NOSE BLOCKI SPRING FROMWITH RUBBER BAND BALL POINT PENIA DIR EDBRASS TURK PAl MODEL SUPPLY BALL I/B GO SPRUCE KEY TANUST BEARING OR 2 PINE BOSE BLOCK OTEEL B BRASS WASHERS BASIC THRUST LINE ARAJSYSENTS 2 RIGHT 1 SOWN COAT INSIDE -OF MOTOR TUBE WITH DOPE I/3D PLY REINF ROLL PROM UHAIN INER I/B SHEET BALSA \ I/B SHEET BLOWN MOTGR BULK1ELD DoNT OMITI 1/4 ALlAH TUBE MOTOR PEG FIF-Z COWER TAIL BOON WITH JAPANESE TOSUE / j i--ROLL FROM BRAIN cTANGENT CUTI VSD GREET BALSA 0I534B6 5F-4 ALL PYLON PARTG 3D SHEET 3/32 SOFT SHEET SOFT BARK BilGES DT ANGLE 45 DORIJIPERTUBE IJPRPEBOJPWBIE DI LIT LWE Que Coupe II CRUR dHHNr BR CLARENCE RAUBIIT 1/16 GUSSETS Iv 140 I/H TOP SPARS NV \ I CENTOR 2 SF V52 OF 3/3D Que dCoupe Cut out pylon parts assemble pylon attach fuselage time wrap fuselage sandpaper slide pylon back forth attain perfect fit Cover pylon Japanese tissue stall wing hold down hooks streamlined pylon provides fuselage cross sectional area required rules Que dCoupe uses can-formed prop blades method construction pro vides good quality blades minimum time material expended feel prop important single com ponent rubber model formed prop blades allow unlimited experimenta tion diameters pitches blade shapes areas Cut rectangular blanks adequate size 1/8 medium sheet stock Soak blanks water 10 minutes bind both blanks either stacked side side approximately 6-inch diameter tin can blanks should canted 15 degrees left vertical provide necessary helical twist finished blade Allow dry thoroughly Drying can hastened baking oven 175 degrees wish Cut blades outline shape Sharpen -inch dowel pencil sharpener epoxy notch blade form hub Above Packing turns inexpensive winding stooge fabricated local welding shopwont flinch motor bursts Left Typical dethermalizer set-up Too much angle brings ship down too fast too little causes spinning45 degrees about right Use fire proof limit line Photos Tim Christie Sand blade airfoil section thinning blade toward tips Drill hole hub trying maintain much accuracy possible although angles specified approximate purpose angles allow blades fold properly against fuselage sides Final adjustments made bend ing wire hub Finish blades dope Apply rein forcing fabric hub areas small hooks provide power fold de sired small rubberband stretched tween hooks through winding loop hub will insure positive fold time Fabricate nose block shown bend wire parts specifications Bush nose block brass tubing stall prop shaft thrust bearing spring Bend 90-degree angle prop shaft bind hub winding 1oop prop shaft copper wire Solder securely Install prop blade hub retain -A wheel collars Trim dowel bears hub provide stop limit blade folding forward Twist wire continued page 93 February 1977 43 Que dCoupe/Haught continued page 43 hub provide proper angle 54 degrees prop shaft 5-inch blade station Check prop balance add weight sand heavy blade bring prop balance Determine proper location prop stop screw stop prop horizontal position tension oil shaft spring winding hook shown plans desirable accessory allows motor wound prop assembly practice prop assembly removed winder engaged directly winding hook After winding length music wire inserted tubing wind ing hook hold wound motor prop nose block assembly hooked procedure lessens possibility damage bursting motors during wind ing Always secure nose block retaining band jolt stopping prop can dislodge nose block disrupt ing flight trim major dilemma facing rubber fliers today difficulty obtaining quality rubber Pirelli long time standard no longer available its replacement Filati does measure up old Pirelli standards inconsistent batch batch old stocks understand Filati getting better samples have tested proved disappointing Some old stock Pirelli available want pay price quantitites limited reason recommend use something available order may become thoroughly familiar its characteristics model will need extensive retrimming new batch rubber leaves about two choices Sig FAI rubber sold Ed Dolby FAI Model Supply chose Dolby rubber takes fewer winds Pirelli has stronger initial burst good perform ance can obtained available 3/16 hs reasonably priced suggest start i/4 FAI rubber experiment other sizes brands model fully acquainted Prepare several motors cutting lengths weigh slightly under 10 grams Wash thoroughly remove talc lubri cate 50-50 mixture glycerine surgical jelly Just pour dab lube palm hand motor other rub vigorously thoroughly coat motor Tie ends together overhand knot pulled tight followed square knot snugged up Clip off short ends Break motors stretching five times length minute increasing stretch six times length another min ute finally releasing tension gradually during one-minute period can break four five motors time smooth door knob makes good anchor end short length -inch larger dowel works good handle end Loop motor six strands chor end solidly Hook winder other end Stretch motor out approxi mately 30 inches crank about 175 turns move slowly continuing wind count Wind until motor bursts note number turns Use figure guide winding flight Allow 5 percent safety margin word about winders just planning flying Coupe small shop egg beater type hand drill will just fine Obtain sturdy hook i/8 material hardware store have nut February 1977 93 flit P R 0 D U CT S N C DAVISVILLE ROAD OW GROVE PA 19090 659-3900 NOW. THE SUPER POWER TEAM Could Start Something Big SUPER/GEL. EXPRESSLY FOR MODEL USE Say goodby batteries really designed something else No need make anymore Super/Gel Fast Charge & Discharge Needed Models Sealed-in Gel No water no spill no leak MA Full 45 amp hours between recharges Long Life Recharge 500 TImes SULLIVAN CHARGER . GREAT TEAMMATE U UL Listed Plugs Ordinary House Current Fully Charges Battery 12 Hours 500 ma Output ideal New Battery Can Used Most Wet Cell Batteries Too hobby eno n FREE SAMPLE Pin Clamps Try em youll want Send ad selfaddressed stamped envelope ROCKET CITY SPECIALTIES 103 Wholesale Ave NE Huntsville Ala 35811 MA Que dCoupecontinued brazed threaded end prevent hook pulling out drill chuck Most drills have approximately 4-to-i gear ratios Determine what yours can convert winder handle turns motor turns plan graduate Wakefield and/or Unlimited buy ready made winder make heavy-duty hand drill Attach D-type handle remove chuck install permanent winding hook Que dCoupe flies right power right glide Prepare flight double checking surfaces alignment Rudder should 1/16 right Wing tab should down 1/16 Tips washed out 1/16 Stab should titled right side high CU thrust line shown plans slack out motor prop blades held folded position rubberband test glide shimming stab until smooth floating glide slight right turn obtained Put 100 hand turns motor launch right wind nose up slightly Observe carefully right moderate climbing turn indicates well looking dangerous traits time As long model does spiral dive right continue add power using winder ship spiral dives re duce right thrust increase wing tab down adjustment As increase power full winds cor rect climb turn angle thrust adjustments small sanding block flight kit handy Keep right wing up tab Adjust glide turn stab tilt glide angle slight CU shifts may fine tune flight trim small rudder tab stabilizer incidence adjustments Change motors other flight practicing flight competition Spinner/Spector continued page 49 Spinners design does away fin ickiness trying get gyro fly variety speeds simple expedient flying speed hows cheap trick uses four systematically related main functional design elements achieve provide stability speed 1 Constant speed rotor 2 Balance forces singular flight speed 3 Pendulum stability 4 Light weight controlled amount induced drag makes almost constant-speed rotor provides lift/drag vector tends stay put can balanced proper alignment prop thrust center gravity slipstream/rotor stream interaction rudder thrust Perturbations flying attitude quickly damped pendu lum action landing gear heavier plane less stable due inertial effects momentary gain/loss airspeed up/downwind turns launches too fast slow will fly much weight launch speed comes highly critical wind will upset Try yourself like add ing weight just rearward CU generate higher angle attack lift watch interesting variety crashes plane destabilizes what starts out smooth flight Construction will find model very quick make few procedures slightly differ ent convention should followed else wont work right balsa version uses North Pacifics 4-dia Skeeter prop bearing equivalent size same no heavier can com pensated bending landing gear aft wheels rubber Sleek Streak equivalent note rubber size fairly critical Select very light straight sheets 1/16 1/32 balsa no denser Skeeters wings used contest grade 1/32 blades soft rigid turned out slightly thicker 1/32 1/20 perfect cant get light wood youd best forget whole thing make plastic model instead can use Sleek Streak landing gear simply bend wheels forward out youll need 1/32 wire rotor shaft might well use make longer landing gear Fly kinds weather experiment rubber Try 3/16 8-strand motors etc Try put Coupe thermal max have some good articles thermals lately Check some RC glider columns Get rubber technique down pat start looking good Wakefield design its much stable Just follow bends original extend legs rotor-shaft bearing must metal nylon else will quickly wear out allow rotor disc tilt out specs indicated CG produces nice climb either real steep climb flat penetration use rearward forward CU building rotor mast respectively forward rearward aw fuselage fuselage mostly cosmetic can vary greatly shape provided same thrust rotor position CU used Build own favorite design uses parameters resulting about 30 hours flight testing fol lowing closely should definitely put ballpark Make rotor first Cut out blades glue together water-based glue wetting out side joint water Holding joint close heat source such heat gun twist negative pitch dihedral blades remember unpowered blades screw downward just glider points down rising thermal Use jig plans get angles exact sure blades straight along diameter sight along re spective leading edges opposite tips Balsarite crystal clear liquid makes balsawood watertight times Monokote sags comes unglued its cause balsa drying out contracting pulling away Monokote Balsarite helps eliminate problem performs same Solarfilm nearly oth er covering makes iron-ons stick bet ter due deep wood penetration Coverite 2779 Philmont Ave Huntingdon Valley Pennsylvania 19006 p roduotviewp rod uctevgewprod uctrviewprod u Ctre o ie W 94 Model Aviation p oduoteviewp rod ootevewprod uct ,viewp rod octreview COX ENGINES COX/SANWA RIC SYSTEMS AIRTRONICS KITS C end catalog complete 525 E Warner Ave ama Ana CA 92702 HOBBIES