Double Whammy

/2 DOUBLE WHAMMY designed simple model introduce Indoor rubber trim handling some building techniques modelers never before tried fascinating world Indoor model aircraft has successful airplane scores have built people skill levels regular contests have scheduled design event using mass-launch approach quite spectacular see 25 brightly colored aircraft simultaneously circling toward ceiling criterion materials equipment construction flying must readily available Three items normally found workshop required wwY w A box transport model Indoor flying site container should allow disassembled components lay flat bottom Unfortunately veiy popular box copier paper just little too small importance proper box cannot overstated Indoor models broken mishandling hardly ever crashes flight stresses geared winder Sig catalog lists 161 winder less $20 Since rubber motor will require well excess 1000 turus respectable flights hand-winding using winder lesser gear ratio could quite tiresome good supply 1/16 width TAN-Il rubber FAI Model Supply motors 68 Model Aviation os author Ii, j~n h ~i kn N er construction underway Wedges used again hold pieces place Drinking straw glue well right Glue stick can used apply adhesive structure covering Soft balsa applicator makes job easier Completed DW rest run-down stand Bong Eagles other groups have used design successfully youth Completed motorstick tail assembly balanced find proper horizontal Center Gravity location Wing held flat Note offset/twist built wing posts gives left main panel washin proper climb November1999 69 Scrap balsa used wedges side strip hold Trim excess covering sharp razor blade place having pin through wood splits Type FF Indoor Wingspan 17 inches Flying weight 5-6 grams Motor Tan II rubber strip Construction Built-up Covering Tissue no finish LEADING EDGE 1/16 SQ FULL-SIZE PLANS DELTA DART PROP AND BEARING PIN LIKE THIS-DO NOT PIN THROUGH WOOD 2-1/4 DIHEDRAL JOINT DETAIL TRIM AWAY EXCESS AFTER GLUE HAS DRIED 2-1/4 7 I 0 0 z CG 50% III WING DIHEDRAL NOT TO SCALE 1/16 50 7 U 0 e.J ILl TRAILING EDGE 1/16 50 SNUG FIT NOTCH ALLOWS INCIDENCE ADJUSTMENT AND WING REMOVAL FOR TRANSPORT MOTOR STICK 1/8 x 1/4 x 10 BOTTOM VIEW -4 0 0 0 CD 0 4Co uJ z w w o cc O-J z U m 0 C d cnZ Co cc 0 z 0 0 III DOUBLE WHAMMY DESIGNED BY CHUCK MARKOS LOU SCHOWALTEREET 1 OF 2 JAN 1994 THAN THE LEFT.MODEL FLIES NOTE RIGHT WING IS SHORTER U LU n m ElI REAR POST CANTED CREATE WING TWIST I8 TO LEFTTO STAB TRAILING EDGE1/16 SQ WING POSTTRAILING EDGE 1/16 SQ 1 1/2 APPROX /C 6OVER LEFTS1DE STRAIGHT PIN AT ANCHOR OF FIN ONLY POINTGLUE WELL 0 4 TAIL BOOM 118 x 114 x 8 TAPER TO 1116 SQ BOflOM VIEW 1 APPROX CONSTRUCTION Use firm balsa motorstick inner portions wing leading trailing edges vertical wing posts other balsa should quite lightweight Proper wood selection utmost importance Indoor model since making incorrect choices may result finished model constant need repair too light requires excess ballast maintain center gravity CG Only $2900 Lights 1 2 glow plugs Wt1O oz 12 V cell lights plugs 9/l6Hxl 3/8Wx2 1/8L Compatible radios point fuly adjustable just plain overweight heavy model necessarily strong model Most precut strip balsa firm enough high-stress components above rest can cut sheet balsa appropriate thickness density using metal straightedge single-edge razor blade finished airframe should weigh five six grams Place plans surface will Remote LED available no extra charge specify type radio plug desired Glow plug connectors chargers Nicds available Add $200 shipping Ga residents add 7% tax Product list prices available Master Card Visa accepted package deal Nicd battery charger glow plug connector Hook up kit Everything need complete installationl JHM Aero Engineering 123 Radford Circle Marietta Ga 30060 770-438-7146 Fax 770-438-9654 accept pins easily use Celotex ceiling tile Cover plans plastic food wrap before construction keep glue sticking structure plans Please note technique illustrated holding strips balsa place using opposed scraps pins gently clamp pieces place Use either Duco Ambroid cement apply small quantities make glue well short section plastic drinking straw pushed modeling clay toothpick can used transfer glue joints Make sure glue gets between two pieces wood joined Tailboom/Fin Stabilizer cannot form double-tapered boom shown plans its okay use medium-weight /16 balsa sheet single taper cut /16 x sq over its length Make precise bevel cuts soft square fin LE TE pieces match angle attachment tailboom should slightly overlength glued place Did use scrap balsa pins hold everything place Mark location tip piece LE TE cut through using sharp razor blade crush balsa Hint Use scrap manila folder paper under two marked fin members cut doesnt go through plastic wrap plans gap will allow excess glue seep onto paper make removal completed fin difficult As square fin tip cut slightly longer its final dimension glued place Trim length after glue has dried stabilizer designed minimum area could made lightweight wood still rugged enough withstand rigors handling flying LE TE cut slightly overlength held place using balsa scraps pins 72 Model Aviation -IT Magazine Multi-Cylinders Ask DGS 5 Only $4900 Save $1000 Ask about IEUJW U1W7 followingUD followingJ OS 405 engineAdvesive OS 40S Engine ce OS 35S CL Wheels Acme U-4 Brass Stellar Spec 60 Brodak Controlenginei4 AdhesiveFuel Tankx 015 control line WheelsLinesE Sullivan 2 3/4L1 10x6 Prop Brass ls ivan ControlFuel Tank 1 extra McCoy Handle Sullivan Handle Plug Tank Adhesive TCI Price $20000TCI Price $16500TCI Price 1 9050 crosspieces ribs must fit precisely between LB TE technique attain fit place end crosspiece against LE cutting partially through location TB crosspiece can picked up grabs razor blade cut can completed cutting board crosspiece bows causes LE TE bow much too long must reduced size wont stay place glue too short must discarded use too-short piece gauge cut its replacement just hair longer depend glue fill gaps practice will result heavier weaker structure properly fitted pieces Once crosspieces glued place glue has dried trim excess length LE TE Cover fin also stabilizer gift-wrapping tissue still contact plastic wrap held glue seeped joints Cut tissue about 112 inch longer length width cover piece Make sure grain tissue runs spanwise stabilizer Use glue stick Kidstick UHU Stic coat wood will come contact covering Place covering over adhesive-treated structure rub gently finger hold place Use scrap manila folder cardboard loosen structure plastic wrap Trim excess paper wood using very sharp razor blade extra careful tear paper cutting across grain Place stabilizer upsidedown glue tailboom fin LE TB locations Wing The wing construction similar stabilizer major difference dihedral added tip section after covering Prepare placing some glue over joints center section LB TB meet tip sections glue will act hinge later Did remember cover wing paper grain spanwise yEW1WU4ukLfEEwIWmIWLUIWpWMW5vAwwEwiwNM 6SSSSSS NEW P-3000 CELLS$625 Ea SANYO RC-2000 CELLS$550 Ea SANYO RC-2000 CELLS MATCHED$600 Ea SANYO RC-1700 CELLS new$400 Ea SANYO RC-1700 CELLS MATCHED$450 Ea SANYO KR1400 AE$350 Ea SANYO N1000 SCR CELLS$350 Ea SANYO N700 AA CELLS$150 Ea SANYO N500 AR CELLS$350 Ea SANYO KR600 AE CELLS$250 Ea SANYO N800 AR CELLS$350 Ea SANYO N350 AA CELLS$250 Ea 4 CELL 270AA RECEIVER PACK$1000 Ea 5 CELL 1000 AE RECEIVER PACK$1800 Ea CONNECTORS PFD & BLACK$150 Pr SHRINK BARS AND ON SITE EXPERT ADVICE AND INFORMATION QUALITY MODELING PRODUCTS WERE THERE WHEN YOU NEED US WHERE ELSE CAN YOU GET THAT GLOW PLUG ON SATURDAY MORNING AMA FAX APPLICATIONS AVAILABLE LOCAL CLUB NEWS AND HAPPENINGS PART OF NATIONWIDE ORGANIZATION WORKING FOR THE BETTERMENT OF THE HOBBY INDUSTRY HAVE YOU EVER RACED ON MAIL ORDER TRACK REMEMBER WHO GOT YOU STARTED IN RIC November1999 73 ONALnErA% LOOK FOR YOUR LOCAL HOBBY STORES ASSCAT1Ot NCNRHSA HOBBY SHOP www hobbystoresorg Davis Diesel Heads Over ito models 049-36 Worlds largest producer Model Diesel Fuels Tronslorms Yuor 25 to 40w 40100 60 60100 90 90 too 120 Up 50% Power 4- Rum llvice Long Some Easy Starting e Sound No Glou Plugs DAVIS morn rmcoucnu PO Box 141 Dept MA ord Ct 06460 877-1670 o coroploto rrfOrroOtjOo pocket send $400 cedd oppliod first order attempt tighten tissue spraying water alcohol might outdoor model structure model strong enough resist warping tissue shrinks add dihedral covered wing placed upside-down support 2 inches high three sheets plywood under center section tips bent down hanging over edges Place weight center section hold place tips held down building board scrap balsa pins Sharpen four stakes tAs square balsa put gob glue also some gaps formed between center section tip LE TE Push preglued stakes joints let glue dry about hour Trim excess away fingernail clipper Prepare two wing posts gussets added center rib location sure posts will skewed inboard wing will washed-in have higher angle attack outboard wing wing posts forced parallel configuration placed sockets motorstick sure glue joints dry before wing assembled motorstick Motorstick The motorstick 10-inch length 1/ x a Using wood same hard piece prepare two notched sockets will fitted place later Bevel end tailboom will offset left about inch glued motorstick glue end motorstick about /s inch up addition left offset Push straight pin motorstick end tailboom assemble propeller bearing front motorstick using scrap /s balsa fill gap Prepare rubber motor loop about 15 inches length Double connect thrust hook rear pin Find location assembly balances finger mark Place two socket pieces equidistant balance point left side motor stick total distance between sockets should 41/is inches Flying An Indoor rubber model different other models has asymmetric construction fly left-hand circles Note left wing longer right Make sure assembly wing motor stick maintains orientation As noted construction section wing also twisted provide incidence inboard outboard model doesnt demonstrate twist assembled reposition wing posts correct other built-in adjustment offset fin model may also need some left thrust flight circle too large diameter keep model hitting wall flying site can accomplished removing propeller bearing slicing thin wedge right-front motorstick gluing same wedge left-front side before replacing propeller bearing adjustable part model changing wing incidence sliding wing posts up down sockets correct stalls dives Initial flights should have about 200300 turns motor After motor tied form single loop coat some commercial rubber lube substitute hand cream will increase number turns may put motor also decrease internal friction unwinds power propeller Have helper hold model thrust bearing stretch rubber motor rearward about four five times its relaxed length winder As wind move last winds put just approach rear pin Take motor off winder pinching doesnt unwind attach rear pin Take propeller helper hand hold model motorstick just under wing other Simultaneously release propeller give DW gentle push forward Indoor rubber models should no nonpowered/deadstick glide phase flight best duration model should under power launch until touchdown using bit energy stored motor turn put motor used up model lands too turns left motor may too heavy way use motor change propeller lower pitch twisting both blades lower angle moredrastic change cut diameter propeller Impressive increases flight duration can obtained optimizing propeller-motor combination already trimmed model Double Whammy will outperform Delta Dart intent model teach newcomers some basics make performance model However model can converted Pennyplane changing 12inch-diameter wood prop wing cambered airfoil Such changes will result model capable five-minute flights original intent design two thus name Double Whammy Editors note sufficient reader response may run followup article Penn yplane conversion Happy Landings k Markos 655 Carlisle Ave Deerfield IL 60015 74 Model Aviation HASSLE MORE FUN Dieselize Davis Diesel Its Awesome

/2 DOUBLE WHAMMY designed simple model introduce Indoor rubber trim handling some building techniques modelers never before tried fascinating world Indoor model aircraft has successful airplane scores have built people skill levels regular contests have scheduled design event using mass-launch approach quite spectacular see 25 brightly colored aircraft simultaneously circling toward ceiling criterion materials equipment construction flying must readily available Three items normally found workshop required wwY w A box transport model Indoor flying site container should allow disassembled components lay flat bottom Unfortunately veiy popular box copier paper just little too small importance proper box cannot overstated Indoor models broken mishandling hardly ever crashes flight stresses geared winder Sig catalog lists 161 winder less $20 Since rubber motor will require well excess 1000 turus respectable flights hand-winding using winder lesser gear ratio could quite tiresome good supply 1/16 width TAN-Il rubber FAI Model Supply motors 68 Model Aviation os author Ii, j~n h ~i kn N er construction underway Wedges used again hold pieces place Drinking straw glue well right Glue stick can used apply adhesive structure covering Soft balsa applicator makes job easier Completed DW rest run-down stand Bong Eagles other groups have used design successfully youth Completed motorstick tail assembly balanced find proper horizontal Center Gravity location Wing held flat Note offset/twist built wing posts gives left main panel washin proper climb November1999 69 Scrap balsa used wedges side strip hold Trim excess covering sharp razor blade place having pin through wood splits Type FF Indoor Wingspan 17 inches Flying weight 5-6 grams Motor Tan II rubber strip Construction Built-up Covering Tissue no finish LEADING EDGE 1/16 SQ FULL-SIZE PLANS DELTA DART PROP AND BEARING PIN LIKE THIS-DO NOT PIN THROUGH WOOD 2-1/4 DIHEDRAL JOINT DETAIL TRIM AWAY EXCESS AFTER GLUE HAS DRIED 2-1/4 7 I 0 0 z CG 50% III WING DIHEDRAL NOT TO SCALE 1/16 50 7 U 0 e.J ILl TRAILING EDGE 1/16 50 SNUG FIT NOTCH ALLOWS INCIDENCE ADJUSTMENT AND WING REMOVAL FOR TRANSPORT MOTOR STICK 1/8 x 1/4 x 10 BOTTOM VIEW -4 0 0 0 CD 0 4Co uJ z w w o cc O-J z U m 0 C d cnZ Co cc 0 z 0 0 III DOUBLE WHAMMY DESIGNED BY CHUCK MARKOS LOU SCHOWALTEREET 1 OF 2 JAN 1994 THAN THE LEFT.MODEL FLIES NOTE RIGHT WING IS SHORTER U LU n m ElI REAR POST CANTED CREATE WING TWIST I8 TO LEFTTO STAB TRAILING EDGE1/16 SQ WING POSTTRAILING EDGE 1/16 SQ 1 1/2 APPROX /C 6OVER LEFTS1DE STRAIGHT PIN AT ANCHOR OF FIN ONLY POINTGLUE WELL 0 4 TAIL BOOM 118 x 114 x 8 TAPER TO 1116 SQ BOflOM VIEW 1 APPROX CONSTRUCTION Use firm balsa motorstick inner portions wing leading trailing edges vertical wing posts other balsa should quite lightweight Proper wood selection utmost importance Indoor model since making incorrect choices may result finished model constant need repair too light requires excess ballast maintain center gravity CG Only $2900 Lights 1 2 glow plugs Wt1O oz 12 V cell lights plugs 9/l6Hxl 3/8Wx2 1/8L Compatible radios point fuly adjustable just plain overweight heavy model necessarily strong model Most precut strip balsa firm enough high-stress components above rest can cut sheet balsa appropriate thickness density using metal straightedge single-edge razor blade finished airframe should weigh five six grams Place plans surface will Remote LED available no extra charge specify type radio plug desired Glow plug connectors chargers Nicds available Add $200 shipping Ga residents add 7% tax Product list prices available Master Card Visa accepted package deal Nicd battery charger glow plug connector Hook up kit Everything need complete installationl JHM Aero Engineering 123 Radford Circle Marietta Ga 30060 770-438-7146 Fax 770-438-9654 accept pins easily use Celotex ceiling tile Cover plans plastic food wrap before construction keep glue sticking structure plans Please note technique illustrated holding strips balsa place using opposed scraps pins gently clamp pieces place Use either Duco Ambroid cement apply small quantities make glue well short section plastic drinking straw pushed modeling clay toothpick can used transfer glue joints Make sure glue gets between two pieces wood joined Tailboom/Fin Stabilizer cannot form double-tapered boom shown plans its okay use medium-weight /16 balsa sheet single taper cut /16 x sq over its length Make precise bevel cuts soft square fin LE TE pieces match angle attachment tailboom should slightly overlength glued place Did use scrap balsa pins hold everything place Mark location tip piece LE TE cut through using sharp razor blade crush balsa Hint Use scrap manila folder paper under two marked fin members cut doesnt go through plastic wrap plans gap will allow excess glue seep onto paper make removal completed fin difficult As square fin tip cut slightly longer its final dimension glued place Trim length after glue has dried stabilizer designed minimum area could made lightweight wood still rugged enough withstand rigors handling flying LE TE cut slightly overlength held place using balsa scraps pins 72 Model Aviation -IT Magazine Multi-Cylinders Ask DGS 5 Only $4900 Save $1000 Ask about IEUJW U1W7 followingUD followingJ OS 405 engineAdvesive OS 40S Engine ce OS 35S CL Wheels Acme U-4 Brass Stellar Spec 60 Brodak Controlenginei4 AdhesiveFuel Tankx 015 control line WheelsLinesE Sullivan 2 3/4L1 10x6 Prop Brass ls ivan ControlFuel Tank 1 extra McCoy Handle Sullivan Handle Plug Tank Adhesive TCI Price $20000TCI Price $16500TCI Price 1 9050 crosspieces ribs must fit precisely between LB TE technique attain fit place end crosspiece against LE cutting partially through location TB crosspiece can picked up grabs razor blade cut can completed cutting board crosspiece bows causes LE TE bow much too long must reduced size wont stay place glue too short must discarded use too-short piece gauge cut its replacement just hair longer depend glue fill gaps practice will result heavier weaker structure properly fitted pieces Once crosspieces glued place glue has dried trim excess length LE TE Cover fin also stabilizer gift-wrapping tissue still contact plastic wrap held glue seeped joints Cut tissue about 112 inch longer length width cover piece Make sure grain tissue runs spanwise stabilizer Use glue stick Kidstick UHU Stic coat wood will come contact covering Place covering over adhesive-treated structure rub gently finger hold place Use scrap manila folder cardboard loosen structure plastic wrap Trim excess paper wood using very sharp razor blade extra careful tear paper cutting across grain Place stabilizer upsidedown glue tailboom fin LE TB locations Wing The wing construction similar stabilizer major difference dihedral added tip section after covering Prepare placing some glue over joints center section LB TB meet tip sections glue will act hinge later Did remember cover wing paper grain spanwise yEW1WU4ukLfEEwIWmIWLUIWpWMW5vAwwEwiwNM 6SSSSSS NEW P-3000 CELLS$625 Ea SANYO RC-2000 CELLS$550 Ea SANYO RC-2000 CELLS MATCHED$600 Ea SANYO RC-1700 CELLS new$400 Ea SANYO RC-1700 CELLS MATCHED$450 Ea SANYO KR1400 AE$350 Ea SANYO N1000 SCR CELLS$350 Ea SANYO N700 AA CELLS$150 Ea SANYO N500 AR CELLS$350 Ea SANYO KR600 AE CELLS$250 Ea SANYO N800 AR CELLS$350 Ea SANYO N350 AA CELLS$250 Ea 4 CELL 270AA RECEIVER PACK$1000 Ea 5 CELL 1000 AE RECEIVER PACK$1800 Ea CONNECTORS PFD & BLACK$150 Pr SHRINK BARS AND ON SITE EXPERT ADVICE AND INFORMATION QUALITY MODELING PRODUCTS WERE THERE WHEN YOU NEED US WHERE ELSE CAN YOU GET THAT GLOW PLUG ON SATURDAY MORNING AMA FAX APPLICATIONS AVAILABLE LOCAL CLUB NEWS AND HAPPENINGS PART OF NATIONWIDE ORGANIZATION WORKING FOR THE BETTERMENT OF THE HOBBY INDUSTRY HAVE YOU EVER RACED ON MAIL ORDER TRACK REMEMBER WHO GOT YOU STARTED IN RIC November1999 73 ONALnErA% LOOK FOR YOUR LOCAL HOBBY STORES ASSCAT1Ot NCNRHSA HOBBY SHOP www hobbystoresorg Davis Diesel Heads Over ito models 049-36 Worlds largest producer Model Diesel Fuels Tronslorms Yuor 25 to 40w 40100 60 60100 90 90 too 120 Up 50% Power 4- Rum llvice Long Some Easy Starting e Sound No Glou Plugs DAVIS morn rmcoucnu PO Box 141 Dept MA ord Ct 06460 877-1670 o coroploto rrfOrroOtjOo pocket send $400 cedd oppliod first order attempt tighten tissue spraying water alcohol might outdoor model structure model strong enough resist warping tissue shrinks add dihedral covered wing placed upside-down support 2 inches high three sheets plywood under center section tips bent down hanging over edges Place weight center section hold place tips held down building board scrap balsa pins Sharpen four stakes tAs square balsa put gob glue also some gaps formed between center section tip LE TE Push preglued stakes joints let glue dry about hour Trim excess away fingernail clipper Prepare two wing posts gussets added center rib location sure posts will skewed inboard wing will washed-in have higher angle attack outboard wing wing posts forced parallel configuration placed sockets motorstick sure glue joints dry before wing assembled motorstick Motorstick The motorstick 10-inch length 1/ x a Using wood same hard piece prepare two notched sockets will fitted place later Bevel end tailboom will offset left about inch glued motorstick glue end motorstick about /s inch up addition left offset Push straight pin motorstick end tailboom assemble propeller bearing front motorstick using scrap /s balsa fill gap Prepare rubber motor loop about 15 inches length Double connect thrust hook rear pin Find location assembly balances finger mark Place two socket pieces equidistant balance point left side motor stick total distance between sockets should 41/is inches Flying An Indoor rubber model different other models has asymmetric construction fly left-hand circles Note left wing longer right Make sure assembly wing motor stick maintains orientation As noted construction section wing also twisted provide incidence inboard outboard model doesnt demonstrate twist assembled reposition wing posts correct other built-in adjustment offset fin model may also need some left thrust flight circle too large diameter keep model hitting wall flying site can accomplished removing propeller bearing slicing thin wedge right-front motorstick gluing same wedge left-front side before replacing propeller bearing adjustable part model changing wing incidence sliding wing posts up down sockets correct stalls dives Initial flights should have about 200300 turns motor After motor tied form single loop coat some commercial rubber lube substitute hand cream will increase number turns may put motor also decrease internal friction unwinds power propeller Have helper hold model thrust bearing stretch rubber motor rearward about four five times its relaxed length winder As wind move last winds put just approach rear pin Take motor off winder pinching doesnt unwind attach rear pin Take propeller helper hand hold model motorstick just under wing other Simultaneously release propeller give DW gentle push forward Indoor rubber models should no nonpowered/deadstick glide phase flight best duration model should under power launch until touchdown using bit energy stored motor turn put motor used up model lands too turns left motor may too heavy way use motor change propeller lower pitch twisting both blades lower angle moredrastic change cut diameter propeller Impressive increases flight duration can obtained optimizing propeller-motor combination already trimmed model Double Whammy will outperform Delta Dart intent model teach newcomers some basics make performance model However model can converted Pennyplane changing 12inch-diameter wood prop wing cambered airfoil Such changes will result model capable five-minute flights original intent design two thus name Double Whammy Editors note sufficient reader response may run followup article Penn yplane conversion Happy Landings k Markos 655 Carlisle Ave Deerfield IL 60015 74 Model Aviation HASSLE MORE FUN Dieselize Davis Diesel Its Awesome

/2 DOUBLE WHAMMY designed simple model introduce Indoor rubber trim handling some building techniques modelers never before tried fascinating world Indoor model aircraft has successful airplane scores have built people skill levels regular contests have scheduled design event using mass-launch approach quite spectacular see 25 brightly colored aircraft simultaneously circling toward ceiling criterion materials equipment construction flying must readily available Three items normally found workshop required wwY w A box transport model Indoor flying site container should allow disassembled components lay flat bottom Unfortunately veiy popular box copier paper just little too small importance proper box cannot overstated Indoor models broken mishandling hardly ever crashes flight stresses geared winder Sig catalog lists 161 winder less $20 Since rubber motor will require well excess 1000 turus respectable flights hand-winding using winder lesser gear ratio could quite tiresome good supply 1/16 width TAN-Il rubber FAI Model Supply motors 68 Model Aviation os author Ii, j~n h ~i kn N er construction underway Wedges used again hold pieces place Drinking straw glue well right Glue stick can used apply adhesive structure covering Soft balsa applicator makes job easier Completed DW rest run-down stand Bong Eagles other groups have used design successfully youth Completed motorstick tail assembly balanced find proper horizontal Center Gravity location Wing held flat Note offset/twist built wing posts gives left main panel washin proper climb November1999 69 Scrap balsa used wedges side strip hold Trim excess covering sharp razor blade place having pin through wood splits Type FF Indoor Wingspan 17 inches Flying weight 5-6 grams Motor Tan II rubber strip Construction Built-up Covering Tissue no finish LEADING EDGE 1/16 SQ FULL-SIZE PLANS DELTA DART PROP AND BEARING PIN LIKE THIS-DO NOT PIN THROUGH WOOD 2-1/4 DIHEDRAL JOINT DETAIL TRIM AWAY EXCESS AFTER GLUE HAS DRIED 2-1/4 7 I 0 0 z CG 50% III WING DIHEDRAL NOT TO SCALE 1/16 50 7 U 0 e.J ILl TRAILING EDGE 1/16 50 SNUG FIT NOTCH ALLOWS INCIDENCE ADJUSTMENT AND WING REMOVAL FOR TRANSPORT MOTOR STICK 1/8 x 1/4 x 10 BOTTOM VIEW -4 0 0 0 CD 0 4Co uJ z w w o cc O-J z U m 0 C d cnZ Co cc 0 z 0 0 III DOUBLE WHAMMY DESIGNED BY CHUCK MARKOS LOU SCHOWALTEREET 1 OF 2 JAN 1994 THAN THE LEFT.MODEL FLIES NOTE RIGHT WING IS SHORTER U LU n m ElI REAR POST CANTED CREATE WING TWIST I8 TO LEFTTO STAB TRAILING EDGE1/16 SQ WING POSTTRAILING EDGE 1/16 SQ 1 1/2 APPROX /C 6OVER LEFTS1DE STRAIGHT PIN AT ANCHOR OF FIN ONLY POINTGLUE WELL 0 4 TAIL BOOM 118 x 114 x 8 TAPER TO 1116 SQ BOflOM VIEW 1 APPROX CONSTRUCTION Use firm balsa motorstick inner portions wing leading trailing edges vertical wing posts other balsa should quite lightweight Proper wood selection utmost importance Indoor model since making incorrect choices may result finished model constant need repair too light requires excess ballast maintain center gravity CG Only $2900 Lights 1 2 glow plugs Wt1O oz 12 V cell lights plugs 9/l6Hxl 3/8Wx2 1/8L Compatible radios point fuly adjustable just plain overweight heavy model necessarily strong model Most precut strip balsa firm enough high-stress components above rest can cut sheet balsa appropriate thickness density using metal straightedge single-edge razor blade finished airframe should weigh five six grams Place plans surface will Remote LED available no extra charge specify type radio plug desired Glow plug connectors chargers Nicds available Add $200 shipping Ga residents add 7% tax Product list prices available Master Card Visa accepted package deal Nicd battery charger glow plug connector Hook up kit Everything need complete installationl JHM Aero Engineering 123 Radford Circle Marietta Ga 30060 770-438-7146 Fax 770-438-9654 accept pins easily use Celotex ceiling tile Cover plans plastic food wrap before construction keep glue sticking structure plans Please note technique illustrated holding strips balsa place using opposed scraps pins gently clamp pieces place Use either Duco Ambroid cement apply small quantities make glue well short section plastic drinking straw pushed modeling clay toothpick can used transfer glue joints Make sure glue gets between two pieces wood joined Tailboom/Fin Stabilizer cannot form double-tapered boom shown plans its okay use medium-weight /16 balsa sheet single taper cut /16 x sq over its length Make precise bevel cuts soft square fin LE TE pieces match angle attachment tailboom should slightly overlength glued place Did use scrap balsa pins hold everything place Mark location tip piece LE TE cut through using sharp razor blade crush balsa Hint Use scrap manila folder paper under two marked fin members cut doesnt go through plastic wrap plans gap will allow excess glue seep onto paper make removal completed fin difficult As square fin tip cut slightly longer its final dimension glued place Trim length after glue has dried stabilizer designed minimum area could made lightweight wood still rugged enough withstand rigors handling flying LE TE cut slightly overlength held place using balsa scraps pins 72 Model Aviation -IT Magazine Multi-Cylinders Ask DGS 5 Only $4900 Save $1000 Ask about IEUJW U1W7 followingUD followingJ OS 405 engineAdvesive OS 40S Engine ce OS 35S CL Wheels Acme U-4 Brass Stellar Spec 60 Brodak Controlenginei4 AdhesiveFuel Tankx 015 control line WheelsLinesE Sullivan 2 3/4L1 10x6 Prop Brass ls ivan ControlFuel Tank 1 extra McCoy Handle Sullivan Handle Plug Tank Adhesive TCI Price $20000TCI Price $16500TCI Price 1 9050 crosspieces ribs must fit precisely between LB TE technique attain fit place end crosspiece against LE cutting partially through location TB crosspiece can picked up grabs razor blade cut can completed cutting board crosspiece bows causes LE TE bow much too long must reduced size wont stay place glue too short must discarded use too-short piece gauge cut its replacement just hair longer depend glue fill gaps practice will result heavier weaker structure properly fitted pieces Once crosspieces glued place glue has dried trim excess length LE TE Cover fin also stabilizer gift-wrapping tissue still contact plastic wrap held glue seeped joints Cut tissue about 112 inch longer length width cover piece Make sure grain tissue runs spanwise stabilizer Use glue stick Kidstick UHU Stic coat wood will come contact covering Place covering over adhesive-treated structure rub gently finger hold place Use scrap manila folder cardboard loosen structure plastic wrap Trim excess paper wood using very sharp razor blade extra careful tear paper cutting across grain Place stabilizer upsidedown glue tailboom fin LE TB locations Wing The wing construction similar stabilizer major difference dihedral added tip section after covering Prepare placing some glue over joints center section LB TB meet tip sections glue will act hinge later Did remember cover wing paper grain spanwise yEW1WU4ukLfEEwIWmIWLUIWpWMW5vAwwEwiwNM 6SSSSSS NEW P-3000 CELLS$625 Ea SANYO RC-2000 CELLS$550 Ea SANYO RC-2000 CELLS MATCHED$600 Ea SANYO RC-1700 CELLS new$400 Ea SANYO RC-1700 CELLS MATCHED$450 Ea SANYO KR1400 AE$350 Ea SANYO N1000 SCR CELLS$350 Ea SANYO N700 AA CELLS$150 Ea SANYO N500 AR CELLS$350 Ea SANYO KR600 AE CELLS$250 Ea SANYO N800 AR CELLS$350 Ea SANYO N350 AA CELLS$250 Ea 4 CELL 270AA RECEIVER PACK$1000 Ea 5 CELL 1000 AE RECEIVER PACK$1800 Ea CONNECTORS PFD & BLACK$150 Pr SHRINK BARS AND ON SITE EXPERT ADVICE AND INFORMATION QUALITY MODELING PRODUCTS WERE THERE WHEN YOU NEED US WHERE ELSE CAN YOU GET THAT GLOW PLUG ON SATURDAY MORNING AMA FAX APPLICATIONS AVAILABLE LOCAL CLUB NEWS AND HAPPENINGS PART OF NATIONWIDE ORGANIZATION WORKING FOR THE BETTERMENT OF THE HOBBY INDUSTRY HAVE YOU EVER RACED ON MAIL ORDER TRACK REMEMBER WHO GOT YOU STARTED IN RIC November1999 73 ONALnErA% LOOK FOR YOUR LOCAL HOBBY STORES ASSCAT1Ot NCNRHSA HOBBY SHOP www hobbystoresorg Davis Diesel Heads Over ito models 049-36 Worlds largest producer Model Diesel Fuels Tronslorms Yuor 25 to 40w 40100 60 60100 90 90 too 120 Up 50% Power 4- Rum llvice Long Some Easy Starting e Sound No Glou Plugs DAVIS morn rmcoucnu PO Box 141 Dept MA ord Ct 06460 877-1670 o coroploto rrfOrroOtjOo pocket send $400 cedd oppliod first order attempt tighten tissue spraying water alcohol might outdoor model structure model strong enough resist warping tissue shrinks add dihedral covered wing placed upside-down support 2 inches high three sheets plywood under center section tips bent down hanging over edges Place weight center section hold place tips held down building board scrap balsa pins Sharpen four stakes tAs square balsa put gob glue also some gaps formed between center section tip LE TE Push preglued stakes joints let glue dry about hour Trim excess away fingernail clipper Prepare two wing posts gussets added center rib location sure posts will skewed inboard wing will washed-in have higher angle attack outboard wing wing posts forced parallel configuration placed sockets motorstick sure glue joints dry before wing assembled motorstick Motorstick The motorstick 10-inch length 1/ x a Using wood same hard piece prepare two notched sockets will fitted place later Bevel end tailboom will offset left about inch glued motorstick glue end motorstick about /s inch up addition left offset Push straight pin motorstick end tailboom assemble propeller bearing front motorstick using scrap /s balsa fill gap Prepare rubber motor loop about 15 inches length Double connect thrust hook rear pin Find location assembly balances finger mark Place two socket pieces equidistant balance point left side motor stick total distance between sockets should 41/is inches Flying An Indoor rubber model different other models has asymmetric construction fly left-hand circles Note left wing longer right Make sure assembly wing motor stick maintains orientation As noted construction section wing also twisted provide incidence inboard outboard model doesnt demonstrate twist assembled reposition wing posts correct other built-in adjustment offset fin model may also need some left thrust flight circle too large diameter keep model hitting wall flying site can accomplished removing propeller bearing slicing thin wedge right-front motorstick gluing same wedge left-front side before replacing propeller bearing adjustable part model changing wing incidence sliding wing posts up down sockets correct stalls dives Initial flights should have about 200300 turns motor After motor tied form single loop coat some commercial rubber lube substitute hand cream will increase number turns may put motor also decrease internal friction unwinds power propeller Have helper hold model thrust bearing stretch rubber motor rearward about four five times its relaxed length winder As wind move last winds put just approach rear pin Take motor off winder pinching doesnt unwind attach rear pin Take propeller helper hand hold model motorstick just under wing other Simultaneously release propeller give DW gentle push forward Indoor rubber models should no nonpowered/deadstick glide phase flight best duration model should under power launch until touchdown using bit energy stored motor turn put motor used up model lands too turns left motor may too heavy way use motor change propeller lower pitch twisting both blades lower angle moredrastic change cut diameter propeller Impressive increases flight duration can obtained optimizing propeller-motor combination already trimmed model Double Whammy will outperform Delta Dart intent model teach newcomers some basics make performance model However model can converted Pennyplane changing 12inch-diameter wood prop wing cambered airfoil Such changes will result model capable five-minute flights original intent design two thus name Double Whammy Editors note sufficient reader response may run followup article Penn yplane conversion Happy Landings k Markos 655 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