The Pacer 15 Swedish Glider Cup latter Individual World Champion award Fl A2 Towllne Gilder Gewain second American win coveted award otherwas late Gerry Ritz won 1959 Photos Gall Gewain except noted THIS DESIGN state art FLA model combines proven circle-tow mechanism strong lightweight struc ture reinforced carbon-fiber fiber glass materials result model gives high performance consistency Pacer intended beginners model like good contest designs model simple build flying Nordic Glider quite few years 1977 trans ferred Los Angeles area quickly discovered going compete hotbed Glider activity would have design improved Glider dedicate lot effort preparing competi tion Since time have built 20 models series call Pacer has different ideas tried discarded all-round successful design thus far has Pacer 15 incorporated lighter wing tips tail structures glide rudder delay present model won 1983 World Championships FlA FF A-2 Towline Glidersthe first US winner since 1959 state-of-the-a ii model respects Matt Gewain system lighter-weight extremities used Pacer 14 high aspect ratio calm-air model flew very well previous season Pacer 15 same concept thermal-type model glide rudder delay holds rudder position between straight tow glide predetermined amount time after model leaves towline works like auto-rudder Power model allowing model zoom-climb rudder position independent glide rudder setting gadget can make trimming zoom-climb much easier climb pattern consistent Construction Pacer 15 good first model beginner utilizes number unusual construction tech niques Rather go through step-by step list model assembled will just point out unusual aspects may find useful 56 Model Aviation privileged Wing built aug consists 1-in balsa plank 6 wide glued topofa straight hardwoodplank lower camber shape wing drawn end balsa plank series spanwise cuts made t top plank table saw depth cut adjusted comes down just lower camber outline using razor plane sanding block balsa between saw cuts removed down lower surface contour jig allows building repairing wings always maintaining same lower surface shape wing ribs cut three 1/16-in sheets hardest balsa can find sheets cut 6-in lengths stacked taped together rib shape cut little oversize band saw required number ribs center panels pinned together sanding lower camber shape aid coarse sandpaper tacked wing jig used sanding block same tip ribs Sand upper surface ribs flat sanding block area gets too much material taken off just Hot Stuff sheet balsa top rib stack continue sanding until have exactly intended airfoil shape cut away D-tube sheeting lower spar ribs separated add material top ribs cut ribs apart sharp knife same tech nique can used tip ribs giving very exact consistent airfoil shape wing wing leading edges built-up Hot-Stuffing -in strip carbon-fiber sheet down lower D-tube sheet gluing second layer carbon-fiber area shown plans Hot-Stuffing eading edge piece top use Jim Bradleys carbon-fiber sheet material cut sharp razor blade guided straightedge glued down Hot Stuff Its much easier use quicker loose fibers epoxy cut trailing edges table saw very hard blocks balsa because very difficult find pre-cut trailing edge stock hard enough order build wing will remain free warps construction method very important use hardest wood can find wing ribs trailing edges wing little lighter has warps cannot controlled worthless contest flying cannot consistently trim such model After trailing edges cut shape use Dremel Moto Tool set up router table cut -in slots carbon-fiber Glue carbon-fiber sheet material trailing edges Hot Stuff inboard top spars built-up next spars cut shape first pinned upside down flat building board aft edge along convenient straight edge 6-in length 3/16-in aluminum tubing will wing wire tube Hot-Stuffed across center top spars balsa fairing block added behind extending out inch both ends wing wire tube Make sure no openings epoxy can get inside tube Next shape fairing block balsa triangular section shown plans wrap center part spar cut 5 center 1-inwide strip 2-oz glass cloth will least two layers glass over entire tube Hot Stuff ends Coat glass slow-curing epoxy pin spar assembly top down flat surface has covered plastic wrap epoxy exposed surfaces spar assembly should blotted away paper towel leaving enough wet glass cloth extra epoxy adds weight no increased strength Assemble wing panel wing jig inner portion top D-tube sheeting has two layers carbon-fiber sheet laminated under balsa done special jig provides correct curvature sheeting put dihedral joints wing jig Next cut center panel diagonal ribs well oversize fit place carefully Also install spar vertical shear webs spruce leading edge cap root bay planking After parts glued place finish shaping wing lower surface sanded tacking sheet sandpaper wing jig sliding wing spanwise back forth over jig until bottom sanded smooth Use flat sanding block shape upper surface Apply two layers -oz glass cloth center panel D-tubes shown plans K&B Super Poxy clear finish reduced 50-50 thinner find takes about 1 oz mixture Cut glass weave 450 span wrap way around D-tube overlap vertical shear web glass hard handle before applied wing adds tremendous strength very little weight Fuselage Build flat jig shown pictures putting down left-side pieces stacking up nose layers balsa piywood Glue tail boom upper lower pieces finish core After glue dries sand top core structure glue right side fuselage After fuselage taken May1985 57 Matt checking timer tow hook mechanisms before going flying site prac tice says can save modeis much time competition fiying top ieveis nothing can left chanceand personal fitness isa must US Air Force photograph What see heart circletow mechanism tow hook base plate made aluminum band saw drill press hours work jig add fin stabilizer platform wing trailing edge platform Note fin frame made out very hard balsa vertical Im post being particularly hard Cut hole aft stab platform top fuselage shown plan reduces weight makes running dethermalizer DT line easier stabilizer uses normal construction except leading edge trailing edge built-up done very simply pinning down lower leading edge spar trailing edge add ribs top part of spanwise ele ments Covering etc Note spars through out model tapered ribs need notched individually locations Also covering stabilizer sure stick tissue down top bottom rib otherwise ribs will buckle tissue tightens use coat 50/50 nitrate stabilizer four coats wing causes tissue sag damp weather does affect models performance Another trick has proven very helpful making model consist ent use cut-down 12-in drills instead music wire wing wires use music wire wire will bend after two hard launches flight trim will change due increased dihedral angle have using cut-down drills two years have yet bend Trimming crucial step getting model fly well trimming carefully Balance model 3 behind leading edge Normally end up model weighing about five 10 grams under 410-gram minimumwith model properly balanced tape extra weight outside fuselage center gravity CG bring weight up 415 420 grams Next check warps flat surface holding three corners panel down measuring height above surface fourth corner right-turning model right inner wing panel has 1/16 washin Both wing tips have Ys washout Verifr tips exactly same comparing flat sur face stab left center panel should flat hcok position rudder deflection should shown plans hcok unlatch tension set 6 lb stab should have slight amount right tilt Take model big schoolyard other big open field hand-glide itto get correct stabilizer incidence set circle-tow rudder adjusting rud der line tumbuckle model ready start circle-towing always circle-tow model first flight have circle-towed before should have no trouble first flight model does turn tightly enough bounce model pulling nose down little letting model have slack line washin stab tilt working properly nose comes back up model stalls will turn much 90 right Circle-tow glide easy adjust using rudder elevator settings hardest part achieve gcod consistent zcom-launch way launch should work First have model circling high end line thermal conditions would want launch model As model comes around downwind side circle run few steps wind pull about 10 ft line model should straighten out wind line unlatches zoom rudder will cause slight turn right As model comes directly overhead release line model should pitch up per58 Model Aviation 4 wing structure designed aid Appie ii home computer Design A2 wings criticai othersa thin high aspect ratio needed forgilde perform ance great deai strength required withstand zoom isunches Air Force photo Above fuseisge built special Jig aids alignment speeds construction Right Seelig muitifunctlon timer Pacer rigged dethermaiizer auto-rudder operations Full-Size Plans Available. See Page 172 OBAIUB BOCC L E232 BALSA SKEET o LATROS OP 00 CANNONnMjIiTTEXiIG ImNALo 0raI#SLB BALSATop sons K FIBER S/SOOT AT AS T0jOABBRALLT /00060 0-fl B WEB H-V 4/ Th42friiF4jViiLL~t V BALSA OS 4T~ToLe NPNN UB/B 00 NBjJ~ftG NNLOA * LAdS OAR OANNN MEET TH\ INN/A UIB$L TIBE NAN SO BALSA VIA PITWOOD EET TOF B BOTTOM NING PLM RIG T sir F tIN BALSA TSAILISA EOOE I/SB BALSA RIBS WING PLAN LEFT SIDE JILLLL B AT LEI DIHEDRAL DETAIL L Tm BrUIT TIP 51 150050 0/ST STAB 7 BRASS LWT TIPSI St BASS MT TOTAL 410 BRASS I/O BALSA 20 PLT 5/52N 12 DRILL CUT TO BA/Z 0/IA BALSA rSTABILZERBA /32 BALSA VERY SNARl WEB LSB I/A TAPER TO I/IA IS BALSA TSP B NOTiON /116 BALSA 0100 TABLE SAW CUTS BALSA PLANK CAMBER LINE AINPEIL UNOENCAA4BER7i PLANOV\~ WINO /10 CONSTRUCTION LA 3/N BALSAI/SUBALSA TOP 6 T TAPERRIBS TO I/SO 20 FUSELAGE SIDE VIEW 0I2 5 5 5 5 PACER 15 1983 PIA NORDIC WORLD CHAMPION DESIGNED BY MArT GEWAIN TRACING BY JOE DEMARCO I/jR PLOI/B PLTWOOO CS 55% OF.W ROOT OI/IN PLY 01005 iT Ill LIRE--i u S aCF/S I/B PL WITS 0-SB BLIBO BATS FOR BASE PLATE JIB B SONS S SPLI OT TOWBOOR B P 0 SC BOAtER OELAT AOOEO SEELB TIMER form climbing right spiral about onethird one-half circle settle glide very little stall Note must take three four steps wind build up models speed launch chance may zoom model right out thermal Always try zoom model location directly above thermal circle-towing trim zoom using slight changes CG position control pitch changes wing washin zoom rudder deflection control yaw CO changes made moving small weight taped outside fuselage fore aft As CO moved forward little model will pitch up launch will pull harder towline As CG moved aft zoom pattern will flatter stall recovery characteristics may suffer nor mally fly new model six months year weight taped outside fuselage frequently move CG little see can improve trim model Training tactics After flying contests over years have learned very few contests won based upon model having superior performance over others Most contests won through consistent performances achieved hav ing reliable model flier prepared fourmost fly manner stay out trouble possible fly smarter others Pacer along other good Nordic designs has enough performance make 3-mm max round contest flier does make mistakes key winning contests concentration training tactics once have good reliable model first basic part training physical fitness Nordic Glider physical modeling events requiring vary ing degrees stamina speed agility depending tactics intend use flights flier should establish exercise routine allows him fly contests fatigue being factor try run 30 miles per week Others bicycle long distances Whatever form exer cise physical fitness necessary part training flying kind model Most training Nordic Glider flying done through practice flying tunately also fun practice flying mean practice what going during contests should practice types weather Continued page 153 Left Wing assembly jig used also ass sanding block lower camber tackgluing sandpaper around Jig sliding wing structure spanwise Right Rudder hookup seen fuselage bottom simple clean Note lightweight stab May1985 59 x I/ION//B BALSA SPARAdA BALSABUILT UP LE SEE AA TAPERS I/It x3/3BNIBSFOR SETAIL 1/16 5445 Sikorsky 5-76 Spirit model 75 long uses GMP Competitor mechan ics Tail drive accomplished via speed ometer cable model features MK retracts weighs 12 pounds all-up model flies very scalelike will eventual ly sport four-bladed main tail rotor systems months three-view will look Russian Kamov KA-25 Nikolai Ka mov died 1973 leaders rotorcraft design Soviet Union characteristic nearly designs being use superimposed coaxial rotors give greater lift vehicle smaller overall size Large numbers Ka- 15 -18 piston-engined machines used Soviet armed forces 1961 Aviation Day fly-past Tushino included completely new machine desig nated Ka-2- carried guided missile side allotted NATO code-name Harp Clearly powered gas turbines looked formidable Later 1960s became clear Kamovs design bureau under chief engi neer Barshevsky developed ma chine standard ship-based machine Soviet fleets replacing Mi-4 Designated Ka-25 allotted new Western code name Hormone service least five major versions numerous subtypes Whereas mis siles displayed 1961 have never seen since thought have dummies Ka-25 fully-equipped all-weather anti-submarine sensing tack equipment four landing wheels surrounded buoyancy-bag ring can swiftly inflated gas bottles just above Ka-25s deployed two main ver sions sub-types have shown changes over years basic ASW model called Hormone-A West has chin radar towed MAD magnetic anomaly detector bird dunk ing sonar normally housed its own rear compartment EQ electro-optical sensor major warships Kiev Minsk sisters carry 27 model Moskva Leningrad carry 18 new Kirov about five Cruis O OUTHERSTERN K~S~m* OR IRCRAFTERS Phone 404-953-3050 314 Lamplicjhter Lane etta Georgia 30067 em such Kresta Kara ships normally carry two three will have supplied India time country receives its three Krivak cruisers An EW electronic warfare version called Hormone-B acquires targets ship-launched missiles prob ably providing mid-course terminal semi-active guidance well perform ing other EW duties has larger radar different shape another radar under rear extensive data-like equipment Three aboard both Kiev Minsk BCNU Lany Jolly 5501 W Como Santa Ana CA 92703 Pacer 15/Gewain Continued page 59 models would fly contestand strive always launch air will make manes should practice other modelers possible great deal learned comparing performances models believe practice flying much possible First want know models characteristics very well before contest model has its own peculiarities Some giide better some turn tighter towline learning characteristics practice can set up trim take advantage otherwise upredictable differences choose model will perform best particular contest day Secondly lots practice flying model launching thermals become very routineso can concentrate staying out trouble flying best tactics conditions tactics should chcose fly contest very dependent ability flight characteristics model weather conditions size nature contest example circle-towing downwind using piggybacking tactics work very well large contests thermals fairly strong can comfortably circle-tow model other circumstances however tactics work very well example early morning very little helpful air frequently cannot tell models KIT SPECIFICATIONS Span-66 Inches 820 Sq Inches Weight7A8/4 Lbs ize Engines W/Pipe 6 1984 NATS Winner KIT FEATURES Epoxy Fiberglass Fuselage & Belly Pan Removable Fiberglass Canopy iled Plans Finished Bulkheads ware Package e Foam Wing & Stabilizer Cores ed Control Surfaces e Wing & Stabilizer Skins good air unless know model watch extended periodso piggy backing frequently does work conditions would suggest develop tactics watching moresuccessful fliers contest trying different tactics until find what comfortable set con dition goal successful competi tor nothing will better prepare actually competing Fly con tests can Develop tactics model trim conditions give up drop manit means need practice best place prac tice have contest conditions Fly same prop over over again Continuous filament fiberglass blades molded epoxy resin Hi-performance test proven propellor blade shape 2-piece 7075 aluminum T6 hardness hub anodized black Removeable steel pins quick blade changes Tested high RPM blades will change pitch PROP HUB ASSEMBLY # 109 15021 size engines electric motor equivalent Weight 85 grams $1500 PROP BLADES FOR HUB # 109 Available 7x 25 7x 3 7x 35 8x 4 $400 per blade $800 per pair Fsr addItional floss woluht stoal hub available PROP HUB ASSEMBLY N 108 285 grams $1500 PROP HUB ASSEMBLY # 110 049 051 engines electric motor equivalent Weight 5 grams $1500 PROP BLADES FOB HUB # 110 Available 6x 3 $400 per blade $600 per pair Additional sizes larger diameters available soon Send SSAE catalog sheet complete line OEALER IIUUIRIU INVITED May1985 153 FAI RUBBER Sizes 1/4 3/16 1/8 3/32 1/16 042 thick pound box Price $1300 FREE oz bottle SLICK rubber lube per box Postpaid UPS USA 65 FF kits mci Starduster Coupe Deville 4 Satellites now avail Dragmaster Zingo FAI Power Tilka Wakefield P-30s 2 pacifier tanks Crocket hooks Slick lube Seelig & KSB timers Front ends 3 prop kits 2 kinds fuse winders kinds hardware Books much 1985 catalog 75 Cal add 6% tax FAI Model Supply XTEc1o F
Edition: Model Aviation - 1985/05
Page Numbers: 56, 57, 58, 59, 153
The Pacer 15 Swedish Glider Cup latter Individual World Champion award Fl A2 Towllne Gilder Gewain second American win coveted award otherwas late Gerry Ritz won 1959 Photos Gall Gewain except noted THIS DESIGN state art FLA model combines proven circle-tow mechanism strong lightweight struc ture reinforced carbon-fiber fiber glass materials result model gives high performance consistency Pacer intended beginners model like good contest designs model simple build flying Nordic Glider quite few years 1977 trans ferred Los Angeles area quickly discovered going compete hotbed Glider activity would have design improved Glider dedicate lot effort preparing competi tion Since time have built 20 models series call Pacer has different ideas tried discarded all-round successful design thus far has Pacer 15 incorporated lighter wing tips tail structures glide rudder delay present model won 1983 World Championships FlA FF A-2 Towline Glidersthe first US winner since 1959 state-of-the-a ii model respects Matt Gewain system lighter-weight extremities used Pacer 14 high aspect ratio calm-air model flew very well previous season Pacer 15 same concept thermal-type model glide rudder delay holds rudder position between straight tow glide predetermined amount time after model leaves towline works like auto-rudder Power model allowing model zoom-climb rudder position independent glide rudder setting gadget can make trimming zoom-climb much easier climb pattern consistent Construction Pacer 15 good first model beginner utilizes number unusual construction tech niques Rather go through step-by step list model assembled will just point out unusual aspects may find useful 56 Model Aviation privileged Wing built aug consists 1-in balsa plank 6 wide glued topofa straight hardwoodplank lower camber shape wing drawn end balsa plank series spanwise cuts made t top plank table saw depth cut adjusted comes down just lower camber outline using razor plane sanding block balsa between saw cuts removed down lower surface contour jig allows building repairing wings always maintaining same lower surface shape wing ribs cut three 1/16-in sheets hardest balsa can find sheets cut 6-in lengths stacked taped together rib shape cut little oversize band saw required number ribs center panels pinned together sanding lower camber shape aid coarse sandpaper tacked wing jig used sanding block same tip ribs Sand upper surface ribs flat sanding block area gets too much material taken off just Hot Stuff sheet balsa top rib stack continue sanding until have exactly intended airfoil shape cut away D-tube sheeting lower spar ribs separated add material top ribs cut ribs apart sharp knife same tech nique can used tip ribs giving very exact consistent airfoil shape wing wing leading edges built-up Hot-Stuffing -in strip carbon-fiber sheet down lower D-tube sheet gluing second layer carbon-fiber area shown plans Hot-Stuffing eading edge piece top use Jim Bradleys carbon-fiber sheet material cut sharp razor blade guided straightedge glued down Hot Stuff Its much easier use quicker loose fibers epoxy cut trailing edges table saw very hard blocks balsa because very difficult find pre-cut trailing edge stock hard enough order build wing will remain free warps construction method very important use hardest wood can find wing ribs trailing edges wing little lighter has warps cannot controlled worthless contest flying cannot consistently trim such model After trailing edges cut shape use Dremel Moto Tool set up router table cut -in slots carbon-fiber Glue carbon-fiber sheet material trailing edges Hot Stuff inboard top spars built-up next spars cut shape first pinned upside down flat building board aft edge along convenient straight edge 6-in length 3/16-in aluminum tubing will wing wire tube Hot-Stuffed across center top spars balsa fairing block added behind extending out inch both ends wing wire tube Make sure no openings epoxy can get inside tube Next shape fairing block balsa triangular section shown plans wrap center part spar cut 5 center 1-inwide strip 2-oz glass cloth will least two layers glass over entire tube Hot Stuff ends Coat glass slow-curing epoxy pin spar assembly top down flat surface has covered plastic wrap epoxy exposed surfaces spar assembly should blotted away paper towel leaving enough wet glass cloth extra epoxy adds weight no increased strength Assemble wing panel wing jig inner portion top D-tube sheeting has two layers carbon-fiber sheet laminated under balsa done special jig provides correct curvature sheeting put dihedral joints wing jig Next cut center panel diagonal ribs well oversize fit place carefully Also install spar vertical shear webs spruce leading edge cap root bay planking After parts glued place finish shaping wing lower surface sanded tacking sheet sandpaper wing jig sliding wing spanwise back forth over jig until bottom sanded smooth Use flat sanding block shape upper surface Apply two layers -oz glass cloth center panel D-tubes shown plans K&B Super Poxy clear finish reduced 50-50 thinner find takes about 1 oz mixture Cut glass weave 450 span wrap way around D-tube overlap vertical shear web glass hard handle before applied wing adds tremendous strength very little weight Fuselage Build flat jig shown pictures putting down left-side pieces stacking up nose layers balsa piywood Glue tail boom upper lower pieces finish core After glue dries sand top core structure glue right side fuselage After fuselage taken May1985 57 Matt checking timer tow hook mechanisms before going flying site prac tice says can save modeis much time competition fiying top ieveis nothing can left chanceand personal fitness isa must US Air Force photograph What see heart circletow mechanism tow hook base plate made aluminum band saw drill press hours work jig add fin stabilizer platform wing trailing edge platform Note fin frame made out very hard balsa vertical Im post being particularly hard Cut hole aft stab platform top fuselage shown plan reduces weight makes running dethermalizer DT line easier stabilizer uses normal construction except leading edge trailing edge built-up done very simply pinning down lower leading edge spar trailing edge add ribs top part of spanwise ele ments Covering etc Note spars through out model tapered ribs need notched individually locations Also covering stabilizer sure stick tissue down top bottom rib otherwise ribs will buckle tissue tightens use coat 50/50 nitrate stabilizer four coats wing causes tissue sag damp weather does affect models performance Another trick has proven very helpful making model consist ent use cut-down 12-in drills instead music wire wing wires use music wire wire will bend after two hard launches flight trim will change due increased dihedral angle have using cut-down drills two years have yet bend Trimming crucial step getting model fly well trimming carefully Balance model 3 behind leading edge Normally end up model weighing about five 10 grams under 410-gram minimumwith model properly balanced tape extra weight outside fuselage center gravity CG bring weight up 415 420 grams Next check warps flat surface holding three corners panel down measuring height above surface fourth corner right-turning model right inner wing panel has 1/16 washin Both wing tips have Ys washout Verifr tips exactly same comparing flat sur face stab left center panel should flat hcok position rudder deflection should shown plans hcok unlatch tension set 6 lb stab should have slight amount right tilt Take model big schoolyard other big open field hand-glide itto get correct stabilizer incidence set circle-tow rudder adjusting rud der line tumbuckle model ready start circle-towing always circle-tow model first flight have circle-towed before should have no trouble first flight model does turn tightly enough bounce model pulling nose down little letting model have slack line washin stab tilt working properly nose comes back up model stalls will turn much 90 right Circle-tow glide easy adjust using rudder elevator settings hardest part achieve gcod consistent zcom-launch way launch should work First have model circling high end line thermal conditions would want launch model As model comes around downwind side circle run few steps wind pull about 10 ft line model should straighten out wind line unlatches zoom rudder will cause slight turn right As model comes directly overhead release line model should pitch up per58 Model Aviation 4 wing structure designed aid Appie ii home computer Design A2 wings criticai othersa thin high aspect ratio needed forgilde perform ance great deai strength required withstand zoom isunches Air Force photo Above fuseisge built special Jig aids alignment speeds construction Right Seelig muitifunctlon timer Pacer rigged dethermaiizer auto-rudder operations Full-Size Plans Available. See Page 172 OBAIUB BOCC L E232 BALSA SKEET o LATROS OP 00 CANNONnMjIiTTEXiIG ImNALo 0raI#SLB BALSATop sons K FIBER S/SOOT AT AS T0jOABBRALLT /00060 0-fl B WEB H-V 4/ Th42friiF4jViiLL~t V BALSA OS 4T~ToLe NPNN UB/B 00 NBjJ~ftG NNLOA * LAdS OAR OANNN MEET TH\ INN/A UIB$L TIBE NAN SO BALSA VIA PITWOOD EET TOF B BOTTOM NING PLM RIG T sir F tIN BALSA TSAILISA EOOE I/SB BALSA RIBS WING PLAN LEFT SIDE JILLLL B AT LEI DIHEDRAL DETAIL L Tm BrUIT TIP 51 150050 0/ST STAB 7 BRASS LWT TIPSI St BASS MT TOTAL 410 BRASS I/O BALSA 20 PLT 5/52N 12 DRILL CUT TO BA/Z 0/IA BALSA rSTABILZERBA /32 BALSA VERY SNARl WEB LSB I/A TAPER TO I/IA IS BALSA TSP B NOTiON /116 BALSA 0100 TABLE SAW CUTS BALSA PLANK CAMBER LINE AINPEIL UNOENCAA4BER7i PLANOV\~ WINO /10 CONSTRUCTION LA 3/N BALSAI/SUBALSA TOP 6 T TAPERRIBS TO I/SO 20 FUSELAGE SIDE VIEW 0I2 5 5 5 5 PACER 15 1983 PIA NORDIC WORLD CHAMPION DESIGNED BY MArT GEWAIN TRACING BY JOE DEMARCO I/jR PLOI/B PLTWOOO CS 55% OF.W ROOT OI/IN PLY 01005 iT Ill LIRE--i u S aCF/S I/B PL WITS 0-SB BLIBO BATS FOR BASE PLATE JIB B SONS S SPLI OT TOWBOOR B P 0 SC BOAtER OELAT AOOEO SEELB TIMER form climbing right spiral about onethird one-half circle settle glide very little stall Note must take three four steps wind build up models speed launch chance may zoom model right out thermal Always try zoom model location directly above thermal circle-towing trim zoom using slight changes CG position control pitch changes wing washin zoom rudder deflection control yaw CO changes made moving small weight taped outside fuselage fore aft As CO moved forward little model will pitch up launch will pull harder towline As CG moved aft zoom pattern will flatter stall recovery characteristics may suffer nor mally fly new model six months year weight taped outside fuselage frequently move CG little see can improve trim model Training tactics After flying contests over years have learned very few contests won based upon model having superior performance over others Most contests won through consistent performances achieved hav ing reliable model flier prepared fourmost fly manner stay out trouble possible fly smarter others Pacer along other good Nordic designs has enough performance make 3-mm max round contest flier does make mistakes key winning contests concentration training tactics once have good reliable model first basic part training physical fitness Nordic Glider physical modeling events requiring vary ing degrees stamina speed agility depending tactics intend use flights flier should establish exercise routine allows him fly contests fatigue being factor try run 30 miles per week Others bicycle long distances Whatever form exer cise physical fitness necessary part training flying kind model Most training Nordic Glider flying done through practice flying tunately also fun practice flying mean practice what going during contests should practice types weather Continued page 153 Left Wing assembly jig used also ass sanding block lower camber tackgluing sandpaper around Jig sliding wing structure spanwise Right Rudder hookup seen fuselage bottom simple clean Note lightweight stab May1985 59 x I/ION//B BALSA SPARAdA BALSABUILT UP LE SEE AA TAPERS I/It x3/3BNIBSFOR SETAIL 1/16 5445 Sikorsky 5-76 Spirit model 75 long uses GMP Competitor mechan ics Tail drive accomplished via speed ometer cable model features MK retracts weighs 12 pounds all-up model flies very scalelike will eventual ly sport four-bladed main tail rotor systems months three-view will look Russian Kamov KA-25 Nikolai Ka mov died 1973 leaders rotorcraft design Soviet Union characteristic nearly designs being use superimposed coaxial rotors give greater lift vehicle smaller overall size Large numbers Ka- 15 -18 piston-engined machines used Soviet armed forces 1961 Aviation Day fly-past Tushino included completely new machine desig nated Ka-2- carried guided missile side allotted NATO code-name Harp Clearly powered gas turbines looked formidable Later 1960s became clear Kamovs design bureau under chief engi neer Barshevsky developed ma chine standard ship-based machine Soviet fleets replacing Mi-4 Designated Ka-25 allotted new Western code name Hormone service least five major versions numerous subtypes Whereas mis siles displayed 1961 have never seen since thought have dummies Ka-25 fully-equipped all-weather anti-submarine sensing tack equipment four landing wheels surrounded buoyancy-bag ring can swiftly inflated gas bottles just above Ka-25s deployed two main ver sions sub-types have shown changes over years basic ASW model called Hormone-A West has chin radar towed MAD magnetic anomaly detector bird dunk ing sonar normally housed its own rear compartment EQ electro-optical sensor major warships Kiev Minsk sisters carry 27 model Moskva Leningrad carry 18 new Kirov about five Cruis O OUTHERSTERN K~S~m* OR IRCRAFTERS Phone 404-953-3050 314 Lamplicjhter Lane etta Georgia 30067 em such Kresta Kara ships normally carry two three will have supplied India time country receives its three Krivak cruisers An EW electronic warfare version called Hormone-B acquires targets ship-launched missiles prob ably providing mid-course terminal semi-active guidance well perform ing other EW duties has larger radar different shape another radar under rear extensive data-like equipment Three aboard both Kiev Minsk BCNU Lany Jolly 5501 W Como Santa Ana CA 92703 Pacer 15/Gewain Continued page 59 models would fly contestand strive always launch air will make manes should practice other modelers possible great deal learned comparing performances models believe practice flying much possible First want know models characteristics very well before contest model has its own peculiarities Some giide better some turn tighter towline learning characteristics practice can set up trim take advantage otherwise upredictable differences choose model will perform best particular contest day Secondly lots practice flying model launching thermals become very routineso can concentrate staying out trouble flying best tactics conditions tactics should chcose fly contest very dependent ability flight characteristics model weather conditions size nature contest example circle-towing downwind using piggybacking tactics work very well large contests thermals fairly strong can comfortably circle-tow model other circumstances however tactics work very well example early morning very little helpful air frequently cannot tell models KIT SPECIFICATIONS Span-66 Inches 820 Sq Inches Weight7A8/4 Lbs ize Engines W/Pipe 6 1984 NATS Winner KIT FEATURES Epoxy Fiberglass Fuselage & Belly Pan Removable Fiberglass Canopy iled Plans Finished Bulkheads ware Package e Foam Wing & Stabilizer Cores ed Control Surfaces e Wing & Stabilizer Skins good air unless know model watch extended periodso piggy backing frequently does work conditions would suggest develop tactics watching moresuccessful fliers contest trying different tactics until find what comfortable set con dition goal successful competi tor nothing will better prepare actually competing Fly con tests can Develop tactics model trim conditions give up drop manit means need practice best place prac tice have contest conditions Fly same prop over over again Continuous filament fiberglass blades molded epoxy resin Hi-performance test proven propellor blade shape 2-piece 7075 aluminum T6 hardness hub anodized black Removeable steel pins quick blade changes Tested high RPM blades will change pitch PROP HUB ASSEMBLY # 109 15021 size engines electric motor equivalent Weight 85 grams $1500 PROP BLADES FOR HUB # 109 Available 7x 25 7x 3 7x 35 8x 4 $400 per blade $800 per pair Fsr addItional floss woluht stoal hub available PROP HUB ASSEMBLY N 108 285 grams $1500 PROP HUB ASSEMBLY # 110 049 051 engines electric motor equivalent Weight 5 grams $1500 PROP BLADES FOB HUB # 110 Available 6x 3 $400 per blade $600 per pair Additional sizes larger diameters available soon Send SSAE catalog sheet complete line OEALER IIUUIRIU INVITED May1985 153 FAI RUBBER Sizes 1/4 3/16 1/8 3/32 1/16 042 thick pound box Price $1300 FREE oz bottle SLICK rubber lube per box Postpaid UPS USA 65 FF kits mci Starduster Coupe Deville 4 Satellites now avail Dragmaster Zingo FAI Power Tilka Wakefield P-30s 2 pacifier tanks Crocket hooks Slick lube Seelig & KSB timers Front ends 3 prop kits 2 kinds fuse winders kinds hardware Books much 1985 catalog 75 Cal add 6% tax FAI Model Supply XTEc1o F
Edition: Model Aviation - 1985/05
Page Numbers: 56, 57, 58, 59, 153
The Pacer 15 Swedish Glider Cup latter Individual World Champion award Fl A2 Towllne Gilder Gewain second American win coveted award otherwas late Gerry Ritz won 1959 Photos Gall Gewain except noted THIS DESIGN state art FLA model combines proven circle-tow mechanism strong lightweight struc ture reinforced carbon-fiber fiber glass materials result model gives high performance consistency Pacer intended beginners model like good contest designs model simple build flying Nordic Glider quite few years 1977 trans ferred Los Angeles area quickly discovered going compete hotbed Glider activity would have design improved Glider dedicate lot effort preparing competi tion Since time have built 20 models series call Pacer has different ideas tried discarded all-round successful design thus far has Pacer 15 incorporated lighter wing tips tail structures glide rudder delay present model won 1983 World Championships FlA FF A-2 Towline Glidersthe first US winner since 1959 state-of-the-a ii model respects Matt Gewain system lighter-weight extremities used Pacer 14 high aspect ratio calm-air model flew very well previous season Pacer 15 same concept thermal-type model glide rudder delay holds rudder position between straight tow glide predetermined amount time after model leaves towline works like auto-rudder Power model allowing model zoom-climb rudder position independent glide rudder setting gadget can make trimming zoom-climb much easier climb pattern consistent Construction Pacer 15 good first model beginner utilizes number unusual construction tech niques Rather go through step-by step list model assembled will just point out unusual aspects may find useful 56 Model Aviation privileged Wing built aug consists 1-in balsa plank 6 wide glued topofa straight hardwoodplank lower camber shape wing drawn end balsa plank series spanwise cuts made t top plank table saw depth cut adjusted comes down just lower camber outline using razor plane sanding block balsa between saw cuts removed down lower surface contour jig allows building repairing wings always maintaining same lower surface shape wing ribs cut three 1/16-in sheets hardest balsa can find sheets cut 6-in lengths stacked taped together rib shape cut little oversize band saw required number ribs center panels pinned together sanding lower camber shape aid coarse sandpaper tacked wing jig used sanding block same tip ribs Sand upper surface ribs flat sanding block area gets too much material taken off just Hot Stuff sheet balsa top rib stack continue sanding until have exactly intended airfoil shape cut away D-tube sheeting lower spar ribs separated add material top ribs cut ribs apart sharp knife same tech nique can used tip ribs giving very exact consistent airfoil shape wing wing leading edges built-up Hot-Stuffing -in strip carbon-fiber sheet down lower D-tube sheet gluing second layer carbon-fiber area shown plans Hot-Stuffing eading edge piece top use Jim Bradleys carbon-fiber sheet material cut sharp razor blade guided straightedge glued down Hot Stuff Its much easier use quicker loose fibers epoxy cut trailing edges table saw very hard blocks balsa because very difficult find pre-cut trailing edge stock hard enough order build wing will remain free warps construction method very important use hardest wood can find wing ribs trailing edges wing little lighter has warps cannot controlled worthless contest flying cannot consistently trim such model After trailing edges cut shape use Dremel Moto Tool set up router table cut -in slots carbon-fiber Glue carbon-fiber sheet material trailing edges Hot Stuff inboard top spars built-up next spars cut shape first pinned upside down flat building board aft edge along convenient straight edge 6-in length 3/16-in aluminum tubing will wing wire tube Hot-Stuffed across center top spars balsa fairing block added behind extending out inch both ends wing wire tube Make sure no openings epoxy can get inside tube Next shape fairing block balsa triangular section shown plans wrap center part spar cut 5 center 1-inwide strip 2-oz glass cloth will least two layers glass over entire tube Hot Stuff ends Coat glass slow-curing epoxy pin spar assembly top down flat surface has covered plastic wrap epoxy exposed surfaces spar assembly should blotted away paper towel leaving enough wet glass cloth extra epoxy adds weight no increased strength Assemble wing panel wing jig inner portion top D-tube sheeting has two layers carbon-fiber sheet laminated under balsa done special jig provides correct curvature sheeting put dihedral joints wing jig Next cut center panel diagonal ribs well oversize fit place carefully Also install spar vertical shear webs spruce leading edge cap root bay planking After parts glued place finish shaping wing lower surface sanded tacking sheet sandpaper wing jig sliding wing spanwise back forth over jig until bottom sanded smooth Use flat sanding block shape upper surface Apply two layers -oz glass cloth center panel D-tubes shown plans K&B Super Poxy clear finish reduced 50-50 thinner find takes about 1 oz mixture Cut glass weave 450 span wrap way around D-tube overlap vertical shear web glass hard handle before applied wing adds tremendous strength very little weight Fuselage Build flat jig shown pictures putting down left-side pieces stacking up nose layers balsa piywood Glue tail boom upper lower pieces finish core After glue dries sand top core structure glue right side fuselage After fuselage taken May1985 57 Matt checking timer tow hook mechanisms before going flying site prac tice says can save modeis much time competition fiying top ieveis nothing can left chanceand personal fitness isa must US Air Force photograph What see heart circletow mechanism tow hook base plate made aluminum band saw drill press hours work jig add fin stabilizer platform wing trailing edge platform Note fin frame made out very hard balsa vertical Im post being particularly hard Cut hole aft stab platform top fuselage shown plan reduces weight makes running dethermalizer DT line easier stabilizer uses normal construction except leading edge trailing edge built-up done very simply pinning down lower leading edge spar trailing edge add ribs top part of spanwise ele ments Covering etc Note spars through out model tapered ribs need notched individually locations Also covering stabilizer sure stick tissue down top bottom rib otherwise ribs will buckle tissue tightens use coat 50/50 nitrate stabilizer four coats wing causes tissue sag damp weather does affect models performance Another trick has proven very helpful making model consist ent use cut-down 12-in drills instead music wire wing wires use music wire wire will bend after two hard launches flight trim will change due increased dihedral angle have using cut-down drills two years have yet bend Trimming crucial step getting model fly well trimming carefully Balance model 3 behind leading edge Normally end up model weighing about five 10 grams under 410-gram minimumwith model properly balanced tape extra weight outside fuselage center gravity CG bring weight up 415 420 grams Next check warps flat surface holding three corners panel down measuring height above surface fourth corner right-turning model right inner wing panel has 1/16 washin Both wing tips have Ys washout Verifr tips exactly same comparing flat sur face stab left center panel should flat hcok position rudder deflection should shown plans hcok unlatch tension set 6 lb stab should have slight amount right tilt Take model big schoolyard other big open field hand-glide itto get correct stabilizer incidence set circle-tow rudder adjusting rud der line tumbuckle model ready start circle-towing always circle-tow model first flight have circle-towed before should have no trouble first flight model does turn tightly enough bounce model pulling nose down little letting model have slack line washin stab tilt working properly nose comes back up model stalls will turn much 90 right Circle-tow glide easy adjust using rudder elevator settings hardest part achieve gcod consistent zcom-launch way launch should work First have model circling high end line thermal conditions would want launch model As model comes around downwind side circle run few steps wind pull about 10 ft line model should straighten out wind line unlatches zoom rudder will cause slight turn right As model comes directly overhead release line model should pitch up per58 Model Aviation 4 wing structure designed aid Appie ii home computer Design A2 wings criticai othersa thin high aspect ratio needed forgilde perform ance great deai strength required withstand zoom isunches Air Force photo Above fuseisge built special Jig aids alignment speeds construction Right Seelig muitifunctlon timer Pacer rigged dethermaiizer auto-rudder operations Full-Size Plans Available. See Page 172 OBAIUB BOCC L E232 BALSA SKEET o LATROS OP 00 CANNONnMjIiTTEXiIG ImNALo 0raI#SLB BALSATop sons K FIBER S/SOOT AT AS T0jOABBRALLT /00060 0-fl B WEB H-V 4/ Th42friiF4jViiLL~t V BALSA OS 4T~ToLe NPNN UB/B 00 NBjJ~ftG NNLOA * LAdS OAR OANNN MEET TH\ INN/A UIB$L TIBE NAN SO BALSA VIA PITWOOD EET TOF B BOTTOM NING PLM RIG T sir F tIN BALSA TSAILISA EOOE I/SB BALSA RIBS WING PLAN LEFT SIDE JILLLL B AT LEI DIHEDRAL DETAIL L Tm BrUIT TIP 51 150050 0/ST STAB 7 BRASS LWT TIPSI St BASS MT TOTAL 410 BRASS I/O BALSA 20 PLT 5/52N 12 DRILL CUT TO BA/Z 0/IA BALSA rSTABILZERBA /32 BALSA VERY SNARl WEB LSB I/A TAPER TO I/IA IS BALSA TSP B NOTiON /116 BALSA 0100 TABLE SAW CUTS BALSA PLANK CAMBER LINE AINPEIL UNOENCAA4BER7i PLANOV\~ WINO /10 CONSTRUCTION LA 3/N BALSAI/SUBALSA TOP 6 T TAPERRIBS TO I/SO 20 FUSELAGE SIDE VIEW 0I2 5 5 5 5 PACER 15 1983 PIA NORDIC WORLD CHAMPION DESIGNED BY MArT GEWAIN TRACING BY JOE DEMARCO I/jR PLOI/B PLTWOOO CS 55% OF.W ROOT OI/IN PLY 01005 iT Ill LIRE--i u S aCF/S I/B PL WITS 0-SB BLIBO BATS FOR BASE PLATE JIB B SONS S SPLI OT TOWBOOR B P 0 SC BOAtER OELAT AOOEO SEELB TIMER form climbing right spiral about onethird one-half circle settle glide very little stall Note must take three four steps wind build up models speed launch chance may zoom model right out thermal Always try zoom model location directly above thermal circle-towing trim zoom using slight changes CG position control pitch changes wing washin zoom rudder deflection control yaw CO changes made moving small weight taped outside fuselage fore aft As CO moved forward little model will pitch up launch will pull harder towline As CG moved aft zoom pattern will flatter stall recovery characteristics may suffer nor mally fly new model six months year weight taped outside fuselage frequently move CG little see can improve trim model Training tactics After flying contests over years have learned very few contests won based upon model having superior performance over others Most contests won through consistent performances achieved hav ing reliable model flier prepared fourmost fly manner stay out trouble possible fly smarter others Pacer along other good Nordic designs has enough performance make 3-mm max round contest flier does make mistakes key winning contests concentration training tactics once have good reliable model first basic part training physical fitness Nordic Glider physical modeling events requiring vary ing degrees stamina speed agility depending tactics intend use flights flier should establish exercise routine allows him fly contests fatigue being factor try run 30 miles per week Others bicycle long distances Whatever form exer cise physical fitness necessary part training flying kind model Most training Nordic Glider flying done through practice flying tunately also fun practice flying mean practice what going during contests should practice types weather Continued page 153 Left Wing assembly jig used also ass sanding block lower camber tackgluing sandpaper around Jig sliding wing structure spanwise Right Rudder hookup seen fuselage bottom simple clean Note lightweight stab May1985 59 x I/ION//B BALSA SPARAdA BALSABUILT UP LE SEE AA TAPERS I/It x3/3BNIBSFOR SETAIL 1/16 5445 Sikorsky 5-76 Spirit model 75 long uses GMP Competitor mechan ics Tail drive accomplished via speed ometer cable model features MK retracts weighs 12 pounds all-up model flies very scalelike will eventual ly sport four-bladed main tail rotor systems months three-view will look Russian Kamov KA-25 Nikolai Ka mov died 1973 leaders rotorcraft design Soviet Union characteristic nearly designs being use superimposed coaxial rotors give greater lift vehicle smaller overall size Large numbers Ka- 15 -18 piston-engined machines used Soviet armed forces 1961 Aviation Day fly-past Tushino included completely new machine desig nated Ka-2- carried guided missile side allotted NATO code-name Harp Clearly powered gas turbines looked formidable Later 1960s became clear Kamovs design bureau under chief engi neer Barshevsky developed ma chine standard ship-based machine Soviet fleets replacing Mi-4 Designated Ka-25 allotted new Western code name Hormone service least five major versions numerous subtypes Whereas mis siles displayed 1961 have never seen since thought have dummies Ka-25 fully-equipped all-weather anti-submarine sensing tack equipment four landing wheels surrounded buoyancy-bag ring can swiftly inflated gas bottles just above Ka-25s deployed two main ver sions sub-types have shown changes over years basic ASW model called Hormone-A West has chin radar towed MAD magnetic anomaly detector bird dunk ing sonar normally housed its own rear compartment EQ electro-optical sensor major warships Kiev Minsk sisters carry 27 model Moskva Leningrad carry 18 new Kirov about five Cruis O OUTHERSTERN K~S~m* OR IRCRAFTERS Phone 404-953-3050 314 Lamplicjhter Lane etta Georgia 30067 em such Kresta Kara ships normally carry two three will have supplied India time country receives its three Krivak cruisers An EW electronic warfare version called Hormone-B acquires targets ship-launched missiles prob ably providing mid-course terminal semi-active guidance well perform ing other EW duties has larger radar different shape another radar under rear extensive data-like equipment Three aboard both Kiev Minsk BCNU Lany Jolly 5501 W Como Santa Ana CA 92703 Pacer 15/Gewain Continued page 59 models would fly contestand strive always launch air will make manes should practice other modelers possible great deal learned comparing performances models believe practice flying much possible First want know models characteristics very well before contest model has its own peculiarities Some giide better some turn tighter towline learning characteristics practice can set up trim take advantage otherwise upredictable differences choose model will perform best particular contest day Secondly lots practice flying model launching thermals become very routineso can concentrate staying out trouble flying best tactics conditions tactics should chcose fly contest very dependent ability flight characteristics model weather conditions size nature contest example circle-towing downwind using piggybacking tactics work very well large contests thermals fairly strong can comfortably circle-tow model other circumstances however tactics work very well example early morning very little helpful air frequently cannot tell models KIT SPECIFICATIONS Span-66 Inches 820 Sq Inches Weight7A8/4 Lbs ize Engines W/Pipe 6 1984 NATS Winner KIT FEATURES Epoxy Fiberglass Fuselage & Belly Pan Removable Fiberglass Canopy iled Plans Finished Bulkheads ware Package e Foam Wing & Stabilizer Cores ed Control Surfaces e Wing & Stabilizer Skins good air unless know model watch extended periodso piggy backing frequently does work conditions would suggest develop tactics watching moresuccessful fliers contest trying different tactics until find what comfortable set con dition goal successful competi tor nothing will better prepare actually competing Fly con tests can Develop tactics model trim conditions give up drop manit means need practice best place prac tice have contest conditions Fly same prop over over again Continuous filament fiberglass blades molded epoxy resin Hi-performance test proven propellor blade shape 2-piece 7075 aluminum T6 hardness hub anodized black Removeable steel pins quick blade changes Tested high RPM blades will change pitch PROP HUB ASSEMBLY # 109 15021 size engines electric motor equivalent Weight 85 grams $1500 PROP BLADES FOR HUB # 109 Available 7x 25 7x 3 7x 35 8x 4 $400 per blade $800 per pair Fsr addItional floss woluht stoal hub available PROP HUB ASSEMBLY N 108 285 grams $1500 PROP HUB ASSEMBLY # 110 049 051 engines electric motor equivalent Weight 5 grams $1500 PROP BLADES FOB HUB # 110 Available 6x 3 $400 per blade $600 per pair Additional sizes larger diameters available soon Send SSAE catalog sheet complete line OEALER IIUUIRIU INVITED May1985 153 FAI RUBBER Sizes 1/4 3/16 1/8 3/32 1/16 042 thick pound box Price $1300 FREE oz bottle SLICK rubber lube per box Postpaid UPS USA 65 FF kits mci Starduster Coupe Deville 4 Satellites now avail Dragmaster Zingo FAI Power Tilka Wakefield P-30s 2 pacifier tanks Crocket hooks Slick lube Seelig & KSB timers Front ends 3 prop kits 2 kinds fuse winders kinds hardware Books much 1985 catalog 75 Cal add 6% tax FAI Model Supply XTEc1o F
Edition: Model Aviation - 1985/05
Page Numbers: 56, 57, 58, 59, 153
The Pacer 15 Swedish Glider Cup latter Individual World Champion award Fl A2 Towllne Gilder Gewain second American win coveted award otherwas late Gerry Ritz won 1959 Photos Gall Gewain except noted THIS DESIGN state art FLA model combines proven circle-tow mechanism strong lightweight struc ture reinforced carbon-fiber fiber glass materials result model gives high performance consistency Pacer intended beginners model like good contest designs model simple build flying Nordic Glider quite few years 1977 trans ferred Los Angeles area quickly discovered going compete hotbed Glider activity would have design improved Glider dedicate lot effort preparing competi tion Since time have built 20 models series call Pacer has different ideas tried discarded all-round successful design thus far has Pacer 15 incorporated lighter wing tips tail structures glide rudder delay present model won 1983 World Championships FlA FF A-2 Towline Glidersthe first US winner since 1959 state-of-the-a ii model respects Matt Gewain system lighter-weight extremities used Pacer 14 high aspect ratio calm-air model flew very well previous season Pacer 15 same concept thermal-type model glide rudder delay holds rudder position between straight tow glide predetermined amount time after model leaves towline works like auto-rudder Power model allowing model zoom-climb rudder position independent glide rudder setting gadget can make trimming zoom-climb much easier climb pattern consistent Construction Pacer 15 good first model beginner utilizes number unusual construction tech niques Rather go through step-by step list model assembled will just point out unusual aspects may find useful 56 Model Aviation privileged Wing built aug consists 1-in balsa plank 6 wide glued topofa straight hardwoodplank lower camber shape wing drawn end balsa plank series spanwise cuts made t top plank table saw depth cut adjusted comes down just lower camber outline using razor plane sanding block balsa between saw cuts removed down lower surface contour jig allows building repairing wings always maintaining same lower surface shape wing ribs cut three 1/16-in sheets hardest balsa can find sheets cut 6-in lengths stacked taped together rib shape cut little oversize band saw required number ribs center panels pinned together sanding lower camber shape aid coarse sandpaper tacked wing jig used sanding block same tip ribs Sand upper surface ribs flat sanding block area gets too much material taken off just Hot Stuff sheet balsa top rib stack continue sanding until have exactly intended airfoil shape cut away D-tube sheeting lower spar ribs separated add material top ribs cut ribs apart sharp knife same tech nique can used tip ribs giving very exact consistent airfoil shape wing wing leading edges built-up Hot-Stuffing -in strip carbon-fiber sheet down lower D-tube sheet gluing second layer carbon-fiber area shown plans Hot-Stuffing eading edge piece top use Jim Bradleys carbon-fiber sheet material cut sharp razor blade guided straightedge glued down Hot Stuff Its much easier use quicker loose fibers epoxy cut trailing edges table saw very hard blocks balsa because very difficult find pre-cut trailing edge stock hard enough order build wing will remain free warps construction method very important use hardest wood can find wing ribs trailing edges wing little lighter has warps cannot controlled worthless contest flying cannot consistently trim such model After trailing edges cut shape use Dremel Moto Tool set up router table cut -in slots carbon-fiber Glue carbon-fiber sheet material trailing edges Hot Stuff inboard top spars built-up next spars cut shape first pinned upside down flat building board aft edge along convenient straight edge 6-in length 3/16-in aluminum tubing will wing wire tube Hot-Stuffed across center top spars balsa fairing block added behind extending out inch both ends wing wire tube Make sure no openings epoxy can get inside tube Next shape fairing block balsa triangular section shown plans wrap center part spar cut 5 center 1-inwide strip 2-oz glass cloth will least two layers glass over entire tube Hot Stuff ends Coat glass slow-curing epoxy pin spar assembly top down flat surface has covered plastic wrap epoxy exposed surfaces spar assembly should blotted away paper towel leaving enough wet glass cloth extra epoxy adds weight no increased strength Assemble wing panel wing jig inner portion top D-tube sheeting has two layers carbon-fiber sheet laminated under balsa done special jig provides correct curvature sheeting put dihedral joints wing jig Next cut center panel diagonal ribs well oversize fit place carefully Also install spar vertical shear webs spruce leading edge cap root bay planking After parts glued place finish shaping wing lower surface sanded tacking sheet sandpaper wing jig sliding wing spanwise back forth over jig until bottom sanded smooth Use flat sanding block shape upper surface Apply two layers -oz glass cloth center panel D-tubes shown plans K&B Super Poxy clear finish reduced 50-50 thinner find takes about 1 oz mixture Cut glass weave 450 span wrap way around D-tube overlap vertical shear web glass hard handle before applied wing adds tremendous strength very little weight Fuselage Build flat jig shown pictures putting down left-side pieces stacking up nose layers balsa piywood Glue tail boom upper lower pieces finish core After glue dries sand top core structure glue right side fuselage After fuselage taken May1985 57 Matt checking timer tow hook mechanisms before going flying site prac tice says can save modeis much time competition fiying top ieveis nothing can left chanceand personal fitness isa must US Air Force photograph What see heart circletow mechanism tow hook base plate made aluminum band saw drill press hours work jig add fin stabilizer platform wing trailing edge platform Note fin frame made out very hard balsa vertical Im post being particularly hard Cut hole aft stab platform top fuselage shown plan reduces weight makes running dethermalizer DT line easier stabilizer uses normal construction except leading edge trailing edge built-up done very simply pinning down lower leading edge spar trailing edge add ribs top part of spanwise ele ments Covering etc Note spars through out model tapered ribs need notched individually locations Also covering stabilizer sure stick tissue down top bottom rib otherwise ribs will buckle tissue tightens use coat 50/50 nitrate stabilizer four coats wing causes tissue sag damp weather does affect models performance Another trick has proven very helpful making model consist ent use cut-down 12-in drills instead music wire wing wires use music wire wire will bend after two hard launches flight trim will change due increased dihedral angle have using cut-down drills two years have yet bend Trimming crucial step getting model fly well trimming carefully Balance model 3 behind leading edge Normally end up model weighing about five 10 grams under 410-gram minimumwith model properly balanced tape extra weight outside fuselage center gravity CG bring weight up 415 420 grams Next check warps flat surface holding three corners panel down measuring height above surface fourth corner right-turning model right inner wing panel has 1/16 washin Both wing tips have Ys washout Verifr tips exactly same comparing flat sur face stab left center panel should flat hcok position rudder deflection should shown plans hcok unlatch tension set 6 lb stab should have slight amount right tilt Take model big schoolyard other big open field hand-glide itto get correct stabilizer incidence set circle-tow rudder adjusting rud der line tumbuckle model ready start circle-towing always circle-tow model first flight have circle-towed before should have no trouble first flight model does turn tightly enough bounce model pulling nose down little letting model have slack line washin stab tilt working properly nose comes back up model stalls will turn much 90 right Circle-tow glide easy adjust using rudder elevator settings hardest part achieve gcod consistent zcom-launch way launch should work First have model circling high end line thermal conditions would want launch model As model comes around downwind side circle run few steps wind pull about 10 ft line model should straighten out wind line unlatches zoom rudder will cause slight turn right As model comes directly overhead release line model should pitch up per58 Model Aviation 4 wing structure designed aid Appie ii home computer Design A2 wings criticai othersa thin high aspect ratio needed forgilde perform ance great deai strength required withstand zoom isunches Air Force photo Above fuseisge built special Jig aids alignment speeds construction Right Seelig muitifunctlon timer Pacer rigged dethermaiizer auto-rudder operations Full-Size Plans Available. See Page 172 OBAIUB BOCC L E232 BALSA SKEET o LATROS OP 00 CANNONnMjIiTTEXiIG ImNALo 0raI#SLB BALSATop sons K FIBER S/SOOT AT AS T0jOABBRALLT /00060 0-fl B WEB H-V 4/ Th42friiF4jViiLL~t V BALSA OS 4T~ToLe NPNN UB/B 00 NBjJ~ftG NNLOA * LAdS OAR OANNN MEET TH\ INN/A UIB$L TIBE NAN SO BALSA VIA PITWOOD EET TOF B BOTTOM NING PLM RIG T sir F tIN BALSA TSAILISA EOOE I/SB BALSA RIBS WING PLAN LEFT SIDE JILLLL B AT LEI DIHEDRAL DETAIL L Tm BrUIT TIP 51 150050 0/ST STAB 7 BRASS LWT TIPSI St BASS MT TOTAL 410 BRASS I/O BALSA 20 PLT 5/52N 12 DRILL CUT TO BA/Z 0/IA BALSA rSTABILZERBA /32 BALSA VERY SNARl WEB LSB I/A TAPER TO I/IA IS BALSA TSP B NOTiON /116 BALSA 0100 TABLE SAW CUTS BALSA PLANK CAMBER LINE AINPEIL UNOENCAA4BER7i PLANOV\~ WINO /10 CONSTRUCTION LA 3/N BALSAI/SUBALSA TOP 6 T TAPERRIBS TO I/SO 20 FUSELAGE SIDE VIEW 0I2 5 5 5 5 PACER 15 1983 PIA NORDIC WORLD CHAMPION DESIGNED BY MArT GEWAIN TRACING BY JOE DEMARCO I/jR PLOI/B PLTWOOO CS 55% OF.W ROOT OI/IN PLY 01005 iT Ill LIRE--i u S aCF/S I/B PL WITS 0-SB BLIBO BATS FOR BASE PLATE JIB B SONS S SPLI OT TOWBOOR B P 0 SC BOAtER OELAT AOOEO SEELB TIMER form climbing right spiral about onethird one-half circle settle glide very little stall Note must take three four steps wind build up models speed launch chance may zoom model right out thermal Always try zoom model location directly above thermal circle-towing trim zoom using slight changes CG position control pitch changes wing washin zoom rudder deflection control yaw CO changes made moving small weight taped outside fuselage fore aft As CO moved forward little model will pitch up launch will pull harder towline As CG moved aft zoom pattern will flatter stall recovery characteristics may suffer nor mally fly new model six months year weight taped outside fuselage frequently move CG little see can improve trim model Training tactics After flying contests over years have learned very few contests won based upon model having superior performance over others Most contests won through consistent performances achieved hav ing reliable model flier prepared fourmost fly manner stay out trouble possible fly smarter others Pacer along other good Nordic designs has enough performance make 3-mm max round contest flier does make mistakes key winning contests concentration training tactics once have good reliable model first basic part training physical fitness Nordic Glider physical modeling events requiring vary ing degrees stamina speed agility depending tactics intend use flights flier should establish exercise routine allows him fly contests fatigue being factor try run 30 miles per week Others bicycle long distances Whatever form exer cise physical fitness necessary part training flying kind model Most training Nordic Glider flying done through practice flying tunately also fun practice flying mean practice what going during contests should practice types weather Continued page 153 Left Wing assembly jig used also ass sanding block lower camber tackgluing sandpaper around Jig sliding wing structure spanwise Right Rudder hookup seen fuselage bottom simple clean Note lightweight stab May1985 59 x I/ION//B BALSA SPARAdA BALSABUILT UP LE SEE AA TAPERS I/It x3/3BNIBSFOR SETAIL 1/16 5445 Sikorsky 5-76 Spirit model 75 long uses GMP Competitor mechan ics Tail drive accomplished via speed ometer cable model features MK retracts weighs 12 pounds all-up model flies very scalelike will eventual ly sport four-bladed main tail rotor systems months three-view will look Russian Kamov KA-25 Nikolai Ka mov died 1973 leaders rotorcraft design Soviet Union characteristic nearly designs being use superimposed coaxial rotors give greater lift vehicle smaller overall size Large numbers Ka- 15 -18 piston-engined machines used Soviet armed forces 1961 Aviation Day fly-past Tushino included completely new machine desig nated Ka-2- carried guided missile side allotted NATO code-name Harp Clearly powered gas turbines looked formidable Later 1960s became clear Kamovs design bureau under chief engi neer Barshevsky developed ma chine standard ship-based machine Soviet fleets replacing Mi-4 Designated Ka-25 allotted new Western code name Hormone service least five major versions numerous subtypes Whereas mis siles displayed 1961 have never seen since thought have dummies Ka-25 fully-equipped all-weather anti-submarine sensing tack equipment four landing wheels surrounded buoyancy-bag ring can swiftly inflated gas bottles just above Ka-25s deployed two main ver sions sub-types have shown changes over years basic ASW model called Hormone-A West has chin radar towed MAD magnetic anomaly detector bird dunk ing sonar normally housed its own rear compartment EQ electro-optical sensor major warships Kiev Minsk sisters carry 27 model Moskva Leningrad carry 18 new Kirov about five Cruis O OUTHERSTERN K~S~m* OR IRCRAFTERS Phone 404-953-3050 314 Lamplicjhter Lane etta Georgia 30067 em such Kresta Kara ships normally carry two three will have supplied India time country receives its three Krivak cruisers An EW electronic warfare version called Hormone-B acquires targets ship-launched missiles prob ably providing mid-course terminal semi-active guidance well perform ing other EW duties has larger radar different shape another radar under rear extensive data-like equipment Three aboard both Kiev Minsk BCNU Lany Jolly 5501 W Como Santa Ana CA 92703 Pacer 15/Gewain Continued page 59 models would fly contestand strive always launch air will make manes should practice other modelers possible great deal learned comparing performances models believe practice flying much possible First want know models characteristics very well before contest model has its own peculiarities Some giide better some turn tighter towline learning characteristics practice can set up trim take advantage otherwise upredictable differences choose model will perform best particular contest day Secondly lots practice flying model launching thermals become very routineso can concentrate staying out trouble flying best tactics conditions tactics should chcose fly contest very dependent ability flight characteristics model weather conditions size nature contest example circle-towing downwind using piggybacking tactics work very well large contests thermals fairly strong can comfortably circle-tow model other circumstances however tactics work very well example early morning very little helpful air frequently cannot tell models KIT SPECIFICATIONS Span-66 Inches 820 Sq Inches Weight7A8/4 Lbs ize Engines W/Pipe 6 1984 NATS Winner KIT FEATURES Epoxy Fiberglass Fuselage & Belly Pan Removable Fiberglass Canopy iled Plans Finished Bulkheads ware Package e Foam Wing & Stabilizer Cores ed Control Surfaces e Wing & Stabilizer Skins good air unless know model watch extended periodso piggy backing frequently does work conditions would suggest develop tactics watching moresuccessful fliers contest trying different tactics until find what comfortable set con dition goal successful competi tor nothing will better prepare actually competing Fly con tests can Develop tactics model trim conditions give up drop manit means need practice best place prac tice have contest conditions Fly same prop over over again Continuous filament fiberglass blades molded epoxy resin Hi-performance test proven propellor blade shape 2-piece 7075 aluminum T6 hardness hub anodized black Removeable steel pins quick blade changes Tested high RPM blades will change pitch PROP HUB ASSEMBLY # 109 15021 size engines electric motor equivalent Weight 85 grams $1500 PROP BLADES FOR HUB # 109 Available 7x 25 7x 3 7x 35 8x 4 $400 per blade $800 per pair Fsr addItional floss woluht stoal hub available PROP HUB ASSEMBLY N 108 285 grams $1500 PROP HUB ASSEMBLY # 110 049 051 engines electric motor equivalent Weight 5 grams $1500 PROP BLADES FOB HUB # 110 Available 6x 3 $400 per blade $600 per pair Additional sizes larger diameters available soon Send SSAE catalog sheet complete line OEALER IIUUIRIU INVITED May1985 153 FAI RUBBER Sizes 1/4 3/16 1/8 3/32 1/16 042 thick pound box Price $1300 FREE oz bottle SLICK rubber lube per box Postpaid UPS USA 65 FF kits mci Starduster Coupe Deville 4 Satellites now avail Dragmaster Zingo FAI Power Tilka Wakefield P-30s 2 pacifier tanks Crocket hooks Slick lube Seelig & KSB timers Front ends 3 prop kits 2 kinds fuse winders kinds hardware Books much 1985 catalog 75 Cal add 6% tax FAI Model Supply XTEc1o F
Edition: Model Aviation - 1985/05
Page Numbers: 56, 57, 58, 59, 153
The Pacer 15 Swedish Glider Cup latter Individual World Champion award Fl A2 Towllne Gilder Gewain second American win coveted award otherwas late Gerry Ritz won 1959 Photos Gall Gewain except noted THIS DESIGN state art FLA model combines proven circle-tow mechanism strong lightweight struc ture reinforced carbon-fiber fiber glass materials result model gives high performance consistency Pacer intended beginners model like good contest designs model simple build flying Nordic Glider quite few years 1977 trans ferred Los Angeles area quickly discovered going compete hotbed Glider activity would have design improved Glider dedicate lot effort preparing competi tion Since time have built 20 models series call Pacer has different ideas tried discarded all-round successful design thus far has Pacer 15 incorporated lighter wing tips tail structures glide rudder delay present model won 1983 World Championships FlA FF A-2 Towline Glidersthe first US winner since 1959 state-of-the-a ii model respects Matt Gewain system lighter-weight extremities used Pacer 14 high aspect ratio calm-air model flew very well previous season Pacer 15 same concept thermal-type model glide rudder delay holds rudder position between straight tow glide predetermined amount time after model leaves towline works like auto-rudder Power model allowing model zoom-climb rudder position independent glide rudder setting gadget can make trimming zoom-climb much easier climb pattern consistent Construction Pacer 15 good first model beginner utilizes number unusual construction tech niques Rather go through step-by step list model assembled will just point out unusual aspects may find useful 56 Model Aviation privileged Wing built aug consists 1-in balsa plank 6 wide glued topofa straight hardwoodplank lower camber shape wing drawn end balsa plank series spanwise cuts made t top plank table saw depth cut adjusted comes down just lower camber outline using razor plane sanding block balsa between saw cuts removed down lower surface contour jig allows building repairing wings always maintaining same lower surface shape wing ribs cut three 1/16-in sheets hardest balsa can find sheets cut 6-in lengths stacked taped together rib shape cut little oversize band saw required number ribs center panels pinned together sanding lower camber shape aid coarse sandpaper tacked wing jig used sanding block same tip ribs Sand upper surface ribs flat sanding block area gets too much material taken off just Hot Stuff sheet balsa top rib stack continue sanding until have exactly intended airfoil shape cut away D-tube sheeting lower spar ribs separated add material top ribs cut ribs apart sharp knife same tech nique can used tip ribs giving very exact consistent airfoil shape wing wing leading edges built-up Hot-Stuffing -in strip carbon-fiber sheet down lower D-tube sheet gluing second layer carbon-fiber area shown plans Hot-Stuffing eading edge piece top use Jim Bradleys carbon-fiber sheet material cut sharp razor blade guided straightedge glued down Hot Stuff Its much easier use quicker loose fibers epoxy cut trailing edges table saw very hard blocks balsa because very difficult find pre-cut trailing edge stock hard enough order build wing will remain free warps construction method very important use hardest wood can find wing ribs trailing edges wing little lighter has warps cannot controlled worthless contest flying cannot consistently trim such model After trailing edges cut shape use Dremel Moto Tool set up router table cut -in slots carbon-fiber Glue carbon-fiber sheet material trailing edges Hot Stuff inboard top spars built-up next spars cut shape first pinned upside down flat building board aft edge along convenient straight edge 6-in length 3/16-in aluminum tubing will wing wire tube Hot-Stuffed across center top spars balsa fairing block added behind extending out inch both ends wing wire tube Make sure no openings epoxy can get inside tube Next shape fairing block balsa triangular section shown plans wrap center part spar cut 5 center 1-inwide strip 2-oz glass cloth will least two layers glass over entire tube Hot Stuff ends Coat glass slow-curing epoxy pin spar assembly top down flat surface has covered plastic wrap epoxy exposed surfaces spar assembly should blotted away paper towel leaving enough wet glass cloth extra epoxy adds weight no increased strength Assemble wing panel wing jig inner portion top D-tube sheeting has two layers carbon-fiber sheet laminated under balsa done special jig provides correct curvature sheeting put dihedral joints wing jig Next cut center panel diagonal ribs well oversize fit place carefully Also install spar vertical shear webs spruce leading edge cap root bay planking After parts glued place finish shaping wing lower surface sanded tacking sheet sandpaper wing jig sliding wing spanwise back forth over jig until bottom sanded smooth Use flat sanding block shape upper surface Apply two layers -oz glass cloth center panel D-tubes shown plans K&B Super Poxy clear finish reduced 50-50 thinner find takes about 1 oz mixture Cut glass weave 450 span wrap way around D-tube overlap vertical shear web glass hard handle before applied wing adds tremendous strength very little weight Fuselage Build flat jig shown pictures putting down left-side pieces stacking up nose layers balsa piywood Glue tail boom upper lower pieces finish core After glue dries sand top core structure glue right side fuselage After fuselage taken May1985 57 Matt checking timer tow hook mechanisms before going flying site prac tice says can save modeis much time competition fiying top ieveis nothing can left chanceand personal fitness isa must US Air Force photograph What see heart circletow mechanism tow hook base plate made aluminum band saw drill press hours work jig add fin stabilizer platform wing trailing edge platform Note fin frame made out very hard balsa vertical Im post being particularly hard Cut hole aft stab platform top fuselage shown plan reduces weight makes running dethermalizer DT line easier stabilizer uses normal construction except leading edge trailing edge built-up done very simply pinning down lower leading edge spar trailing edge add ribs top part of spanwise ele ments Covering etc Note spars through out model tapered ribs need notched individually locations Also covering stabilizer sure stick tissue down top bottom rib otherwise ribs will buckle tissue tightens use coat 50/50 nitrate stabilizer four coats wing causes tissue sag damp weather does affect models performance Another trick has proven very helpful making model consist ent use cut-down 12-in drills instead music wire wing wires use music wire wire will bend after two hard launches flight trim will change due increased dihedral angle have using cut-down drills two years have yet bend Trimming crucial step getting model fly well trimming carefully Balance model 3 behind leading edge Normally end up model weighing about five 10 grams under 410-gram minimumwith model properly balanced tape extra weight outside fuselage center gravity CG bring weight up 415 420 grams Next check warps flat surface holding three corners panel down measuring height above surface fourth corner right-turning model right inner wing panel has 1/16 washin Both wing tips have Ys washout Verifr tips exactly same comparing flat sur face stab left center panel should flat hcok position rudder deflection should shown plans hcok unlatch tension set 6 lb stab should have slight amount right tilt Take model big schoolyard other big open field hand-glide itto get correct stabilizer incidence set circle-tow rudder adjusting rud der line tumbuckle model ready start circle-towing always circle-tow model first flight have circle-towed before should have no trouble first flight model does turn tightly enough bounce model pulling nose down little letting model have slack line washin stab tilt working properly nose comes back up model stalls will turn much 90 right Circle-tow glide easy adjust using rudder elevator settings hardest part achieve gcod consistent zcom-launch way launch should work First have model circling high end line thermal conditions would want launch model As model comes around downwind side circle run few steps wind pull about 10 ft line model should straighten out wind line unlatches zoom rudder will cause slight turn right As model comes directly overhead release line model should pitch up per58 Model Aviation 4 wing structure designed aid Appie ii home computer Design A2 wings criticai othersa thin high aspect ratio needed forgilde perform ance great deai strength required withstand zoom isunches Air Force photo Above fuseisge built special Jig aids alignment speeds construction Right Seelig muitifunctlon timer Pacer rigged dethermaiizer auto-rudder operations Full-Size Plans Available. See Page 172 OBAIUB BOCC L E232 BALSA SKEET o LATROS OP 00 CANNONnMjIiTTEXiIG ImNALo 0raI#SLB BALSATop sons K FIBER S/SOOT AT AS T0jOABBRALLT /00060 0-fl B WEB H-V 4/ Th42friiF4jViiLL~t V BALSA OS 4T~ToLe NPNN UB/B 00 NBjJ~ftG NNLOA * LAdS OAR OANNN MEET TH\ INN/A UIB$L TIBE NAN SO BALSA VIA PITWOOD EET TOF B BOTTOM NING PLM RIG T sir F tIN BALSA TSAILISA EOOE I/SB BALSA RIBS WING PLAN LEFT SIDE JILLLL B AT LEI DIHEDRAL DETAIL L Tm BrUIT TIP 51 150050 0/ST STAB 7 BRASS LWT TIPSI St BASS MT TOTAL 410 BRASS I/O BALSA 20 PLT 5/52N 12 DRILL CUT TO BA/Z 0/IA BALSA rSTABILZERBA /32 BALSA VERY SNARl WEB LSB I/A TAPER TO I/IA IS BALSA TSP B NOTiON /116 BALSA 0100 TABLE SAW CUTS BALSA PLANK CAMBER LINE AINPEIL UNOENCAA4BER7i PLANOV\~ WINO /10 CONSTRUCTION LA 3/N BALSAI/SUBALSA TOP 6 T TAPERRIBS TO I/SO 20 FUSELAGE SIDE VIEW 0I2 5 5 5 5 PACER 15 1983 PIA NORDIC WORLD CHAMPION DESIGNED BY MArT GEWAIN TRACING BY JOE DEMARCO I/jR PLOI/B PLTWOOO CS 55% OF.W ROOT OI/IN PLY 01005 iT Ill LIRE--i u S aCF/S I/B PL WITS 0-SB BLIBO BATS FOR BASE PLATE JIB B SONS S SPLI OT TOWBOOR B P 0 SC BOAtER OELAT AOOEO SEELB TIMER form climbing right spiral about onethird one-half circle settle glide very little stall Note must take three four steps wind build up models speed launch chance may zoom model right out thermal Always try zoom model location directly above thermal circle-towing trim zoom using slight changes CG position control pitch changes wing washin zoom rudder deflection control yaw CO changes made moving small weight taped outside fuselage fore aft As CO moved forward little model will pitch up launch will pull harder towline As CG moved aft zoom pattern will flatter stall recovery characteristics may suffer nor mally fly new model six months year weight taped outside fuselage frequently move CG little see can improve trim model Training tactics After flying contests over years have learned very few contests won based upon model having superior performance over others Most contests won through consistent performances achieved hav ing reliable model flier prepared fourmost fly manner stay out trouble possible fly smarter others Pacer along other good Nordic designs has enough performance make 3-mm max round contest flier does make mistakes key winning contests concentration training tactics once have good reliable model first basic part training physical fitness Nordic Glider physical modeling events requiring vary ing degrees stamina speed agility depending tactics intend use flights flier should establish exercise routine allows him fly contests fatigue being factor try run 30 miles per week Others bicycle long distances Whatever form exer cise physical fitness necessary part training flying kind model Most training Nordic Glider flying done through practice flying tunately also fun practice flying mean practice what going during contests should practice types weather Continued page 153 Left Wing assembly jig used also ass sanding block lower camber tackgluing sandpaper around Jig sliding wing structure spanwise Right Rudder hookup seen fuselage bottom simple clean Note lightweight stab May1985 59 x I/ION//B BALSA SPARAdA BALSABUILT UP LE SEE AA TAPERS I/It x3/3BNIBSFOR SETAIL 1/16 5445 Sikorsky 5-76 Spirit model 75 long uses GMP Competitor mechan ics Tail drive accomplished via speed ometer cable model features MK retracts weighs 12 pounds all-up model flies very scalelike will eventual ly sport four-bladed main tail rotor systems months three-view will look Russian Kamov KA-25 Nikolai Ka mov died 1973 leaders rotorcraft design Soviet Union characteristic nearly designs being use superimposed coaxial rotors give greater lift vehicle smaller overall size Large numbers Ka- 15 -18 piston-engined machines used Soviet armed forces 1961 Aviation Day fly-past Tushino included completely new machine desig nated Ka-2- carried guided missile side allotted NATO code-name Harp Clearly powered gas turbines looked formidable Later 1960s became clear Kamovs design bureau under chief engi neer Barshevsky developed ma chine standard ship-based machine Soviet fleets replacing Mi-4 Designated Ka-25 allotted new Western code name Hormone service least five major versions numerous subtypes Whereas mis siles displayed 1961 have never seen since thought have dummies Ka-25 fully-equipped all-weather anti-submarine sensing tack equipment four landing wheels surrounded buoyancy-bag ring can swiftly inflated gas bottles just above Ka-25s deployed two main ver sions sub-types have shown changes over years basic ASW model called Hormone-A West has chin radar towed MAD magnetic anomaly detector bird dunk ing sonar normally housed its own rear compartment EQ electro-optical sensor major warships Kiev Minsk sisters carry 27 model Moskva Leningrad carry 18 new Kirov about five Cruis O OUTHERSTERN K~S~m* OR IRCRAFTERS Phone 404-953-3050 314 Lamplicjhter Lane etta Georgia 30067 em such Kresta Kara ships normally carry two three will have supplied India time country receives its three Krivak cruisers An EW electronic warfare version called Hormone-B acquires targets ship-launched missiles prob ably providing mid-course terminal semi-active guidance well perform ing other EW duties has larger radar different shape another radar under rear extensive data-like equipment Three aboard both Kiev Minsk BCNU Lany Jolly 5501 W Como Santa Ana CA 92703 Pacer 15/Gewain Continued page 59 models would fly contestand strive always launch air will make manes should practice other modelers possible great deal learned comparing performances models believe practice flying much possible First want know models characteristics very well before contest model has its own peculiarities Some giide better some turn tighter towline learning characteristics practice can set up trim take advantage otherwise upredictable differences choose model will perform best particular contest day Secondly lots practice flying model launching thermals become very routineso can concentrate staying out trouble flying best tactics conditions tactics should chcose fly contest very dependent ability flight characteristics model weather conditions size nature contest example circle-towing downwind using piggybacking tactics work very well large contests thermals fairly strong can comfortably circle-tow model other circumstances however tactics work very well example early morning very little helpful air frequently cannot tell models KIT SPECIFICATIONS Span-66 Inches 820 Sq Inches Weight7A8/4 Lbs ize Engines W/Pipe 6 1984 NATS Winner KIT FEATURES Epoxy Fiberglass Fuselage & Belly Pan Removable Fiberglass Canopy iled Plans Finished Bulkheads ware Package e Foam Wing & Stabilizer Cores ed Control Surfaces e Wing & Stabilizer Skins good air unless know model watch extended periodso piggy backing frequently does work conditions would suggest develop tactics watching moresuccessful fliers contest trying different tactics until find what comfortable set con dition goal successful competi tor nothing will better prepare actually competing Fly con tests can Develop tactics model trim conditions give up drop manit means need practice best place prac tice have contest conditions Fly same prop over over again Continuous filament fiberglass blades molded epoxy resin Hi-performance test proven propellor blade shape 2-piece 7075 aluminum T6 hardness hub anodized black Removeable steel pins quick blade changes Tested high RPM blades will change pitch PROP HUB ASSEMBLY # 109 15021 size engines electric motor equivalent Weight 85 grams $1500 PROP BLADES FOR HUB # 109 Available 7x 25 7x 3 7x 35 8x 4 $400 per blade $800 per pair Fsr addItional floss woluht stoal hub available PROP HUB ASSEMBLY N 108 285 grams $1500 PROP HUB ASSEMBLY # 110 049 051 engines electric motor equivalent Weight 5 grams $1500 PROP BLADES FOB HUB # 110 Available 6x 3 $400 per blade $600 per pair Additional sizes larger diameters available soon Send SSAE catalog sheet complete line OEALER IIUUIRIU INVITED May1985 153 FAI RUBBER Sizes 1/4 3/16 1/8 3/32 1/16 042 thick pound box Price $1300 FREE oz bottle SLICK rubber lube per box Postpaid UPS USA 65 FF kits mci Starduster Coupe Deville 4 Satellites now avail Dragmaster Zingo FAI Power Tilka Wakefield P-30s 2 pacifier tanks Crocket hooks Slick lube Seelig & KSB timers Front ends 3 prop kits 2 kinds fuse winders kinds hardware Books much 1985 catalog 75 Cal add 6% tax FAI Model Supply XTEc1o F