p Heres Free Flight Power model thats consistent ex tremely durable flier widely varying flight configurations Its refined over years very competitive AMA Cate gory II EWilliam H Langenberg THIS DESIGN larger modified ver sion Shrike previously published quite some time ago June 1975 Model Builder Though originally designed FAI Power advent such gadgets prop brakes auto tail surfaces made /2A Shrike obsolescent event refinements have potential increase performance FAI Power mod els view utilization requires almost monomaniacal devotion single event As longtime skeptic gadgets Free Flight models chose adapt Shrike AMA B Power classes has remained very compet itive During past 20 years have lived flown Free flight California Arizona Texas surrounding states least modelers standpoint regions show marked differences altitude ter rain climate wind patterns Probably meaningful evaluation can make Shrike its forebears same general design have demon strated consistency durability compet ing under widely varying conditions Originally flown under 20-second enDecember 1989 69 Top picture Shrike completed ready go relatively small rudder well aft sta bilizer clearly visible photo Above Left side front view showing engine de thermalizer timers generous wing dihedral greatly aids stability windy weather flying gine run five-minute max rules Shrike has refined over years com petitive 9-to-12-second power pattern three-minute maxes seem pre dominate today shrike curious predatory bird impales its prey thorns Fly ing fields bristle sorts hazards just lying wait vulnerable Free Flight ships model has met its doom impaled spears wheat stubble spikes barbed wire fences Shrike tougher order built shown plans flown intelligently rugged airplane should outlast its lighter weight competitors survive con test seasons design appeals aesthetic tastes seek consistent highly durable B model cuts down rebuilding time expanding competition time Shrike may answer Construction Stabilizer Beginning construction GIHEGRAL BREAK S S 1/16 BALSA SHEETING INBOARD SECTION NO FOR CLARITY7 ___ S/I CAP B 60 IN B GA 3/16NOT BALSA GUSSET S-S WINS MATCH LINE I/BS/4 BALSA I NO SF TRIPS SN WIS 1/4 BALSA SHEET LEFT WING TIP STABILIZER 1/4 BALSA SHEET 1/4 STOI RUGUER TA 1/16 LEFT FINFIN CR555 I_____ jSECTION 3/35 IGOWE I I/IA GIG ALUM TUBE FOR GT STRING K en VUCflCAI PLAN Left view shows some details geodetic wing structure silhouettes downthrust engine No variable-incidence tail autorudder other gadgets used Shrike Refer text authors reasoning Right Close-up view right side showing some fuel system details rather hefty landing skid engine operates off crankcase pressure steady fuel flow maximum rpm 70 Model Aviation striking right profile perspective shot shows off models sleek lines wire landing skid necessary prevent damage could result DT landings hard surfaces bottom view shows warp-resistant structural details wing elliptical wing stabilizer planforms give airplane pleasing appearance Left thrust obvious photo necessary order eliminate tendency swoop right after hand launch Full-Size Plans Available Page 202 1/ I/IA BALSAASS/IA RACKS SAHARACAP SABIPS RAINS PANELSI LBA SASACESA BALSA SPARSsNeER WING RIB PATTERN I/lA BALSA SHEET SEE WINS RIB BATTERN VIEW TOP B BDTTOM CENTER SECTION FOR LEADINS EDSE CONSTRSCTION1 II / 5/35 PLY BRACED DOUBLE/ / /16 #/BBLSA GUSSETS WIN I/B S I/H SPRU4 WINS SPDS TOP AND BSTTM-7 PLA VlE I/4I BALSA T K STOCKI/H 51/4 SPRUCE L K7 yR I/H BALSA 7 liii / HA BALSAESAS flEWPIE BALSA CIA IB SPRUCE STABILIZER PATTERNI/H 1/1K BALSA SPAR I/B 5 1/1K SPRUCE SPARS 3/IA BALSA ShEETTOP H BOTTOM MAIN 3/1K BALSA SHEET FUSELAGE SIDES TSP AND BOTTOM F-A F-S DOUBLE RIBS S/lK BALSA SHEET GUSSETS / 1/1K BALSA SHEETING CENTER SECTION TOP AND BOTTOM OMITTED FOR CLARITY F-SF-SF-S IIIII DIHEDRAL BALSAI/4SS BALSA BREAK/SHEET 2i75T11/1K B I/H BALSA ONLY _______SPARS TOP -I/HAl/B BALSA WINS TIP SPAR TOP B BOTTOM RIBS B DIAGONALS 1/4 BALSA SHEET STABILIZER 3/lB BALSA SHEET TRAILING EDGE 1/B PLYWOOD FIREWALL F-S F-I AII/ 42A4II [v32][b-1-10-1-10]] TOPVIEWI/H PLYWOOD/ S/IAGG SPRUCEFUSELAGEUB PLYWOODPYLON ID MADE OF FIREWALLALUMINUMIS/B DIA LONGERONG-CARUE/BALSA GREET CORE VESTENGINE FANDPINNER TO TRIANGLE SHAPE3/lA SD SPRUCEGRAIN B 3/IA BALSA5 LEFT THRUST FROM REAR OF PYLON/--j3/IA 5 BALSASHEET SIDED HORIZ GRAINI/IA DIA MUSIC WIRE TO REAR OF FUSELAG~///7lWINS PLATFORMGEE SECTIDNVIEWWING HOOKNOTE COVER FUSELAGE FORWARD SIDE VIEWpzvsLiV-//\OF PYLON WITH FIBERGLASS SEEAND EPOSY RESIN S/IA BALSA SHEETIS TO 23 ENGINE FUSE TOP B BOTTOMF-SF-4F3F 2 F-I 5 DOWN THRUST I/BBALSA SHEET-FORMERS FSLBALANCEBAA PROP THRUF-5A'- POINTI ES F-4 U-IJVFII -- -A-4-t --4--53/ TIMER FUSELAGE SIDE VIEW S/IA SO SPRUCE -WINS PLATFORM3/IA BALSALONGERSNS CARVE HEETTO TRIANGLE SHAPE FROM HERE BACK ~3/IA BALUA- 3/IA BALSA SHEET I/B BALSA -- NOTE GRAI BALSA SHEET 3/IA SD I-VBBALSA3/IA-SPRUCE SHEETBALSASECTION A-A N B-BSHEET SECTION AT PYLON ENGI NE TIMERLA I/H DIA MAGIC WIRE SKIS FIT INTO I/H U TUBE EPOSIES TO REAR OF F NOTE MOUNT DT B TIMERS ON LEFT SIDE OF FUSE MODEL AVIAT1ON A-B SHRIKE DESIGNED BY W H LANGENBERG 0 1 2 3 4 5 TRACING BY JOE DEMARCO -_____- ALL RIGHTS RESERVSD stabilizer allows part covered doped cured before test flying model withstand rigors dethermalizer DT landings enhance durability spruce used spars leading Continued page 175 Left Construction details stabilizer can seen photo Note warp resisting diagonals author used spruce spars lead ing edge strength durability Right shot shows stabilizer its dethermalized position stabilizer designed pop up about 45 degrees dethermalizer timer releases model will descend rapidly thermals inconvenient distance December 1989 71 DIHEDRAL BREAK BALSA T RIBS AG ORALS B BALSA SHEET IULKHEAD DY 3/IA BALSA SHEET SIDES tLtCTSS5IC CiRCUITRY REPLACES 555 URCHSSICAL ADVA5CR tar complete information send seltoddressed stamped best flight third round hut enough Nagy unable improve Hungarians continue favor widechord thick-section rock maple single-bladed propellers over thin carbon-fiber blades used other competitors As holder 25cc FAI world record UK s Paul Eisner person knows can get around pylon speeds approach ing 320 kph However use line ties FAI model F2A somewhat slower second-round speed close personal best good conditions Paul first flier third round took off just light hint rain within 10 seconds downpour model visibly slowed water density creased Swedens Stjarnesund suffered similar fate point flying suspended hour first two fliers allowed reflights Dick McGladdery reverse situation Eisner plagued throughout event engine suddenly being uncooper ative together model showing its best flying qualities windy weather Much hard practice eventually yielded flight 2795 kph second round third-round slower flight being disal lowed because handle-to-pylon problems MeGladdery like competitors did reach full potential Poland fielded full team headed ever-polite charming Andrezej Rachwal joined young son Tomasz Andre zej produced nicely built finished model powered reworked Rossi MK3 fitted own cast aluminum alloy pan own spun-aluminum fat boy large-volume tuned pipe Rachwals Rossi steel sleeve rear bearing housing better alignment permit use standard-size rear bearing Nee dle rollers used big end Andrezej re versed Breitenbach finishing order just managed pip MeGladdery event Theres little bit friendly rivalry developing Young Tomasz Rachwal would ex pected used setup similar fathers flew sensibly considering wind slight stature choosing enter pylon early let model wind up much speed come Tomaszs equipment lit tle stronger can develop flying technique third member Polish team Choj nacki managed 286 kph 86 world champs unable attain earlier form Rachwals flew wide-chord thick-section single-bladed carbon fiber replicas mapleMade Amerha III American Technology RIG & U/C ENGINES 15 thru 61 Glow Plugs & Spark Plugs Ignition Engines 29 35 ORIGINAL REPLACEMENT PARTS Kraft 61 Cox Conquest 15 Testor/McCoy Series 21 Taipan 40 HGK Forster Remco - Viking twin DC 09 diesel call write free information RJL Industries PO Box 5 - Sierra Ma&e CA 91024 818 359-0016 wood props used previous years Chojnacki stayed wood Italian team flew OPS power year stated earlier practiced harder longer anyone else unfortunately efforts fully rewarded Fuel richening during flight seemed problem engines coming near flooding off Frenchman Jean Magne suffered similar fate Italians uncharacteristic manner unable record timed run Moki powered model used large-volume Moki tuned pipe After first-round crash literally broke everything half French teammate Desloges fared much better record 27342 third round good see gentleman champs organizers commented youngster remembers reading about Mon sieur Desloges competing Speed 1953 Belgian Internationals Thats 36 years Speed flying Bulgarians suffered early-goodlaps-and-later-bad-laps syndrome will surely go much faster future remedy problem found Swedes Stjarnesund Fallgren used own machined-steel pipes did Ital ians Along fellow team member Kjellberg used variety enginesRossi Moki Picco strong runs plenty revs unfortunately speed match Like Bulgarians sure progress quickly near future Models upright engines centrifugal fuel switches used two contestants Luis Parramon Spain Gunter Rosenhan Federal Republic Germany Rosenhan has re cently testing Moki fitted Irvine pipe reported impressive gains rpm ex cess 1000 Unfortunately lack time de velop setup meant potential speeds approaching 280 kph could realized Rosenhan admitted being Catch 22 situation longtime CFS setup since due lack competitions flying partners Ger unable undertake extensive test flying required develop new suction fuel sys tem competition came close top two places being settled much forecast al beit lower speeds expected Kalmy kov becoming reigning European Champion addition being World Champion Peter Halmans superlative efforts Irvine 15 uses essentially standard form rewarded third place showing pro duction engine can easily live company hand-built Soviet specials Next years world champs held France near Metz competition should fierce See Editors note detailed listing re suits European CL Championships Speed event will found Competition Newslet ter section magazine RMcM AB Shrike/Langenberg Continued page 71 edge minimizing weight ultimate building criterion may substitute balsa although recommended stabilizer should covered tis sue given least three coats thinned dope generally prefer nitrate butyrate dope because appears less susceptible moisture changes air nitrate dope used coat fuel-proofer must ap plied final step See stabilizer absolutely free warps ensure remains strapping rubberbands flat board storage Wing relatively straightforward building techniques simplified flatbottomed airfoil have few problems Balsa may substituted spruce shown plans though again isnt rec ommended Select wood wing tips care should kept light possible two inboard wing panels ribs should cut %2 quarter grained stock trailing edges prefer ably carved A-in sheet balsa sim ilar grain Assemble wing panels polyhe dral dimensions indicated liberally gluing joints Install plywood gussets trian gular reinforcements shown Sand en tire completed structure carefully ensure attractive covering job recommend covering inboard wing panels GM silkspan silk over tissue latter method used first water shrink tissue apply coat dope December 1989 175 CAPACITIVEDISCHARGE IGNITION SYSTEM teaturing EJECTRQN1CALLY D1TR0ILEfl SPARK c unit99 MAKES MAGNtTS CO5VE5SIS5S SNAP! Free Flight Kits Supplies Rubber er Power Kits Scale Old Timer Too Co2 Electric Motors Rubber Tissue Cox ParIs Rubber Accessories Winding Hooks Timers Nitrate Dope CATALOGUE $200 CAMPBELLS CUSTOM KITS PO BOX 5996 LAKE WORTH FL 33466-5996 monthly publication covering International RC Soaring Scene US $17 yr 21/yr lstCiass Canada/Mexico S22/yr US funds Asia & Pacific $28/yr US funds Europe UK $28/yr US funds Surface Mall Foreign $18/yr US funds RO SOARING DIGEST PO Box 1079 Payson AZ 85547 before covering silk permits silk stretched tight dramatically re duces amount dope absorbs result very taut double covering relatively impervious changes temper ature moisture enhances torsional rigidity wing wing tips should tissue covered As stabilizer apply least three coats nitrate dope wing plus fuelproofer inboard panels Set wing aside allow cure thoroughly right inboard wing panel should have / washin Fin Cut part A-in soft balsa sheet outline shown plan Carve sand streamlined shape indicated Fuselage Select four /6 x 3A6 straight grained spruce strips longerons Carve triangular shape starting about 3 aft Section indicated plan Cut two fuselage sides /6 soft sheet balsa Pin side over plan glue longerons Insert %-in balsa bulkheads just forward aft pylon spacing shown plan Remove first fuselage side plan glue shaped longerons second side longerons dry tach side bulkheads making sure doing entire fuselage prop erly aligned Select sheet medium a fuselage bottom Sand smooth bottom two fuselage sides longerons con necting bulkheads glue entire assembly bottom sheet Pin entire structure flat surface desired Cut pylon very accurately hard %-in sheet balsa notch bulk heads glue firmly place Ensure perfectly vertical Sand smooth fuselage top attach /6 cover sheet along its entire length Glue 46 soft sheet pylon sides place Prepare wing stabilizer platforms shown plan Remove fuselage assembly plan dry Cut drill A-in ply wood firewall fit commercially available aluminum engine pans Install Electric Flight f Controller Perfect 05 Motors 510 cells LIghtweight 12 oo Adjustable switching pointmoney back Solderless tenninal easy hookup $2guarantee ON/OFF Controller495 Power save weight Very high efficiency O06V loss 20 5fre 22x13x63 Add 51ffl shippiog Colitorojo resideoto odd 65% $163 Too Send Chrek money order ooeooith11High Sky Fntaho comooto 3929 Kansas St #9 Otesooe San DlegocA 92104 blind mounting nuts epoxy firewall fuselage forward bulkhead shown plan File carve sand ward fuselage smooth configuration ensure clean junction engine mount Cover entire area fiber glass epoxy resin Sand balance fuselage smooth add wing stabilizer platforms Slot fuselage fin insert shown plan check alignment glue place Add %2 spruce dowel DT bands tubing ex ternal DT string Bend wing hooks /16 wire shown plan epoxy firmly place Sand smooth entire fuselage apply two coats clear dope Install engine DT timers normally apply two coats epoxy paint fuselage finish primarily because durable absolutely fuel-proof de sired however fuselage can tissue covered doped Ensure adequate fuel-proofing applied latter proce dure used original A-B Shrike used pressure fuel system illustrated plans photographs pen bladder pressure system can used preferred Install hot 15-23 size engine choice pre pare model flight testing Flight testing hot A-B model like Shrike first few test flights usually critical airplane passes crucible mishap remaining flights become easier Before attempting first test flight check model carefully proper align ment center-of-gravity location free dom warps test glide adjust plane necessary small increments packing under leading trailing edge stabilizer Hand glides should re veal slight right turn produced adjust ing stab tilt Once glide satisfactory ship ready its first power flight Set en gine timer three-second run start engine hand launch model gently wind about 450 el evation Climb should straight out angle launch slight right spiral observe tendency veer leftward climb correct immediately its generally fatal condition subsequent test flights increase length engine run flight pattern safety mention intestinal forti tude permit models gen eral design have required about %2 left rudder tab keep tail down during climbout /8 washin right board wing panel helps keep latter up during ascent word caution using Shrike interchangeably classes B repeat test procedure upon switching engines Nothing affects Shrikes climb pattern drastically major changes power ergo speed Unless abso lutely certain B engines have equal power output its prudent few short test flights after changing en gines full 9-to-12-second engine run model should make two full turns right during climb enter its glide pattern no stall loss altitude airplane built according plans flight patterns automatically will right-right Competition durability built shown ready-to-fly weight about 24 26 ounces opinion assuming hot engine used extra weight wont noticeably reduce performanceand rugged construction will carry model through several contest seasons Modelers limited building time simply prefer competing building will find Shrikes longevity great advantage risk being iconoclast offer suggestion enhance models du rability further minimize unnecessary testing Once wing stabilizer have aged model properly adjusted has proven competition-worthy little addi tional testing necessary Probably two three short DT flights before contest should suffice question philosophy will take moment recall folded wings damaged models lost Free Flight ships have expe rience traceable superfluous test flights think theyll concede point Battery Box/Render Continued page 73 wires strip 1/2 insulation end Placing spring plate equidistant between lines box bot tom mark mounting holes through wood sharp pencil photos shows spring plate position No tice uncut side opposite spring fingers approximately flush edge wood Drill pilot holes using 1A6 drill slight angle screw does split wood see drawing Mount spring plate screws trapping bared lamp cord under plate Its good idea 176 Model Aviation
Edition: Model Aviation - 1989/12
Page Numbers: 69, 70, 71, 175, 176
p Heres Free Flight Power model thats consistent ex tremely durable flier widely varying flight configurations Its refined over years very competitive AMA Cate gory II EWilliam H Langenberg THIS DESIGN larger modified ver sion Shrike previously published quite some time ago June 1975 Model Builder Though originally designed FAI Power advent such gadgets prop brakes auto tail surfaces made /2A Shrike obsolescent event refinements have potential increase performance FAI Power mod els view utilization requires almost monomaniacal devotion single event As longtime skeptic gadgets Free Flight models chose adapt Shrike AMA B Power classes has remained very compet itive During past 20 years have lived flown Free flight California Arizona Texas surrounding states least modelers standpoint regions show marked differences altitude ter rain climate wind patterns Probably meaningful evaluation can make Shrike its forebears same general design have demon strated consistency durability compet ing under widely varying conditions Originally flown under 20-second enDecember 1989 69 Top picture Shrike completed ready go relatively small rudder well aft sta bilizer clearly visible photo Above Left side front view showing engine de thermalizer timers generous wing dihedral greatly aids stability windy weather flying gine run five-minute max rules Shrike has refined over years com petitive 9-to-12-second power pattern three-minute maxes seem pre dominate today shrike curious predatory bird impales its prey thorns Fly ing fields bristle sorts hazards just lying wait vulnerable Free Flight ships model has met its doom impaled spears wheat stubble spikes barbed wire fences Shrike tougher order built shown plans flown intelligently rugged airplane should outlast its lighter weight competitors survive con test seasons design appeals aesthetic tastes seek consistent highly durable B model cuts down rebuilding time expanding competition time Shrike may answer Construction Stabilizer Beginning construction GIHEGRAL BREAK S S 1/16 BALSA SHEETING INBOARD SECTION NO FOR CLARITY7 ___ S/I CAP B 60 IN B GA 3/16NOT BALSA GUSSET S-S WINS MATCH LINE I/BS/4 BALSA I NO SF TRIPS SN WIS 1/4 BALSA SHEET LEFT WING TIP STABILIZER 1/4 BALSA SHEET 1/4 STOI RUGUER TA 1/16 LEFT FINFIN CR555 I_____ jSECTION 3/35 IGOWE I I/IA GIG ALUM TUBE FOR GT STRING K en VUCflCAI PLAN Left view shows some details geodetic wing structure silhouettes downthrust engine No variable-incidence tail autorudder other gadgets used Shrike Refer text authors reasoning Right Close-up view right side showing some fuel system details rather hefty landing skid engine operates off crankcase pressure steady fuel flow maximum rpm 70 Model Aviation striking right profile perspective shot shows off models sleek lines wire landing skid necessary prevent damage could result DT landings hard surfaces bottom view shows warp-resistant structural details wing elliptical wing stabilizer planforms give airplane pleasing appearance Left thrust obvious photo necessary order eliminate tendency swoop right after hand launch Full-Size Plans Available Page 202 1/ I/IA BALSAASS/IA RACKS SAHARACAP SABIPS RAINS PANELSI LBA SASACESA BALSA SPARSsNeER WING RIB PATTERN I/lA BALSA SHEET SEE WINS RIB BATTERN VIEW TOP B BDTTOM CENTER SECTION FOR LEADINS EDSE CONSTRSCTION1 II / 5/35 PLY BRACED DOUBLE/ / /16 #/BBLSA GUSSETS WIN I/B S I/H SPRU4 WINS SPDS TOP AND BSTTM-7 PLA VlE I/4I BALSA T K STOCKI/H 51/4 SPRUCE L K7 yR I/H BALSA 7 liii / HA BALSAESAS flEWPIE BALSA CIA IB SPRUCE STABILIZER PATTERNI/H 1/1K BALSA SPAR I/B 5 1/1K SPRUCE SPARS 3/IA BALSA ShEETTOP H BOTTOM MAIN 3/1K BALSA SHEET FUSELAGE SIDES TSP AND BOTTOM F-A F-S DOUBLE RIBS S/lK BALSA SHEET GUSSETS / 1/1K BALSA SHEETING CENTER SECTION TOP AND BOTTOM OMITTED FOR CLARITY F-SF-SF-S IIIII DIHEDRAL BALSAI/4SS BALSA BREAK/SHEET 2i75T11/1K B I/H BALSA ONLY _______SPARS TOP -I/HAl/B BALSA WINS TIP SPAR TOP B BOTTOM RIBS B DIAGONALS 1/4 BALSA SHEET STABILIZER 3/lB BALSA SHEET TRAILING EDGE 1/B PLYWOOD FIREWALL F-S F-I AII/ 42A4II [v32][b-1-10-1-10]] TOPVIEWI/H PLYWOOD/ S/IAGG SPRUCEFUSELAGEUB PLYWOODPYLON ID MADE OF FIREWALLALUMINUMIS/B DIA LONGERONG-CARUE/BALSA GREET CORE VESTENGINE FANDPINNER TO TRIANGLE SHAPE3/lA SD SPRUCEGRAIN B 3/IA BALSA5 LEFT THRUST FROM REAR OF PYLON/--j3/IA 5 BALSASHEET SIDED HORIZ GRAINI/IA DIA MUSIC WIRE TO REAR OF FUSELAG~///7lWINS PLATFORMGEE SECTIDNVIEWWING HOOKNOTE COVER FUSELAGE FORWARD SIDE VIEWpzvsLiV-//\OF PYLON WITH FIBERGLASS SEEAND EPOSY RESIN S/IA BALSA SHEETIS TO 23 ENGINE FUSE TOP B BOTTOMF-SF-4F3F 2 F-I 5 DOWN THRUST I/BBALSA SHEET-FORMERS FSLBALANCEBAA PROP THRUF-5A'- POINTI ES F-4 U-IJVFII -- -A-4-t --4--53/ TIMER FUSELAGE SIDE VIEW S/IA SO SPRUCE -WINS PLATFORM3/IA BALSALONGERSNS CARVE HEETTO TRIANGLE SHAPE FROM HERE BACK ~3/IA BALUA- 3/IA BALSA SHEET I/B BALSA -- NOTE GRAI BALSA SHEET 3/IA SD I-VBBALSA3/IA-SPRUCE SHEETBALSASECTION A-A N B-BSHEET SECTION AT PYLON ENGI NE TIMERLA I/H DIA MAGIC WIRE SKIS FIT INTO I/H U TUBE EPOSIES TO REAR OF F NOTE MOUNT DT B TIMERS ON LEFT SIDE OF FUSE MODEL AVIAT1ON A-B SHRIKE DESIGNED BY W H LANGENBERG 0 1 2 3 4 5 TRACING BY JOE DEMARCO -_____- ALL RIGHTS RESERVSD stabilizer allows part covered doped cured before test flying model withstand rigors dethermalizer DT landings enhance durability spruce used spars leading Continued page 175 Left Construction details stabilizer can seen photo Note warp resisting diagonals author used spruce spars lead ing edge strength durability Right shot shows stabilizer its dethermalized position stabilizer designed pop up about 45 degrees dethermalizer timer releases model will descend rapidly thermals inconvenient distance December 1989 71 DIHEDRAL BREAK BALSA T RIBS AG ORALS B BALSA SHEET IULKHEAD DY 3/IA BALSA SHEET SIDES tLtCTSS5IC CiRCUITRY REPLACES 555 URCHSSICAL ADVA5CR tar complete information send seltoddressed stamped best flight third round hut enough Nagy unable improve Hungarians continue favor widechord thick-section rock maple single-bladed propellers over thin carbon-fiber blades used other competitors As holder 25cc FAI world record UK s Paul Eisner person knows can get around pylon speeds approach ing 320 kph However use line ties FAI model F2A somewhat slower second-round speed close personal best good conditions Paul first flier third round took off just light hint rain within 10 seconds downpour model visibly slowed water density creased Swedens Stjarnesund suffered similar fate point flying suspended hour first two fliers allowed reflights Dick McGladdery reverse situation Eisner plagued throughout event engine suddenly being uncooper ative together model showing its best flying qualities windy weather Much hard practice eventually yielded flight 2795 kph second round third-round slower flight being disal lowed because handle-to-pylon problems MeGladdery like competitors did reach full potential Poland fielded full team headed ever-polite charming Andrezej Rachwal joined young son Tomasz Andre zej produced nicely built finished model powered reworked Rossi MK3 fitted own cast aluminum alloy pan own spun-aluminum fat boy large-volume tuned pipe Rachwals Rossi steel sleeve rear bearing housing better alignment permit use standard-size rear bearing Nee dle rollers used big end Andrezej re versed Breitenbach finishing order just managed pip MeGladdery event Theres little bit friendly rivalry developing Young Tomasz Rachwal would ex pected used setup similar fathers flew sensibly considering wind slight stature choosing enter pylon early let model wind up much speed come Tomaszs equipment lit tle stronger can develop flying technique third member Polish team Choj nacki managed 286 kph 86 world champs unable attain earlier form Rachwals flew wide-chord thick-section single-bladed carbon fiber replicas mapleMade Amerha III American Technology RIG & U/C ENGINES 15 thru 61 Glow Plugs & Spark Plugs Ignition Engines 29 35 ORIGINAL REPLACEMENT PARTS Kraft 61 Cox Conquest 15 Testor/McCoy Series 21 Taipan 40 HGK Forster Remco - Viking twin DC 09 diesel call write free information RJL Industries PO Box 5 - Sierra Ma&e CA 91024 818 359-0016 wood props used previous years Chojnacki stayed wood Italian team flew OPS power year stated earlier practiced harder longer anyone else unfortunately efforts fully rewarded Fuel richening during flight seemed problem engines coming near flooding off Frenchman Jean Magne suffered similar fate Italians uncharacteristic manner unable record timed run Moki powered model used large-volume Moki tuned pipe After first-round crash literally broke everything half French teammate Desloges fared much better record 27342 third round good see gentleman champs organizers commented youngster remembers reading about Mon sieur Desloges competing Speed 1953 Belgian Internationals Thats 36 years Speed flying Bulgarians suffered early-goodlaps-and-later-bad-laps syndrome will surely go much faster future remedy problem found Swedes Stjarnesund Fallgren used own machined-steel pipes did Ital ians Along fellow team member Kjellberg used variety enginesRossi Moki Picco strong runs plenty revs unfortunately speed match Like Bulgarians sure progress quickly near future Models upright engines centrifugal fuel switches used two contestants Luis Parramon Spain Gunter Rosenhan Federal Republic Germany Rosenhan has re cently testing Moki fitted Irvine pipe reported impressive gains rpm ex cess 1000 Unfortunately lack time de velop setup meant potential speeds approaching 280 kph could realized Rosenhan admitted being Catch 22 situation longtime CFS setup since due lack competitions flying partners Ger unable undertake extensive test flying required develop new suction fuel sys tem competition came close top two places being settled much forecast al beit lower speeds expected Kalmy kov becoming reigning European Champion addition being World Champion Peter Halmans superlative efforts Irvine 15 uses essentially standard form rewarded third place showing pro duction engine can easily live company hand-built Soviet specials Next years world champs held France near Metz competition should fierce See Editors note detailed listing re suits European CL Championships Speed event will found Competition Newslet ter section magazine RMcM AB Shrike/Langenberg Continued page 71 edge minimizing weight ultimate building criterion may substitute balsa although recommended stabilizer should covered tis sue given least three coats thinned dope generally prefer nitrate butyrate dope because appears less susceptible moisture changes air nitrate dope used coat fuel-proofer must ap plied final step See stabilizer absolutely free warps ensure remains strapping rubberbands flat board storage Wing relatively straightforward building techniques simplified flatbottomed airfoil have few problems Balsa may substituted spruce shown plans though again isnt rec ommended Select wood wing tips care should kept light possible two inboard wing panels ribs should cut %2 quarter grained stock trailing edges prefer ably carved A-in sheet balsa sim ilar grain Assemble wing panels polyhe dral dimensions indicated liberally gluing joints Install plywood gussets trian gular reinforcements shown Sand en tire completed structure carefully ensure attractive covering job recommend covering inboard wing panels GM silkspan silk over tissue latter method used first water shrink tissue apply coat dope December 1989 175 CAPACITIVEDISCHARGE IGNITION SYSTEM teaturing EJECTRQN1CALLY D1TR0ILEfl SPARK c unit99 MAKES MAGNtTS CO5VE5SIS5S SNAP! Free Flight Kits Supplies Rubber er Power Kits Scale Old Timer Too Co2 Electric Motors Rubber Tissue Cox ParIs Rubber Accessories Winding Hooks Timers Nitrate Dope CATALOGUE $200 CAMPBELLS CUSTOM KITS PO BOX 5996 LAKE WORTH FL 33466-5996 monthly publication covering International RC Soaring Scene US $17 yr 21/yr lstCiass Canada/Mexico S22/yr US funds Asia & Pacific $28/yr US funds Europe UK $28/yr US funds Surface Mall Foreign $18/yr US funds RO SOARING DIGEST PO Box 1079 Payson AZ 85547 before covering silk permits silk stretched tight dramatically re duces amount dope absorbs result very taut double covering relatively impervious changes temper ature moisture enhances torsional rigidity wing wing tips should tissue covered As stabilizer apply least three coats nitrate dope wing plus fuelproofer inboard panels Set wing aside allow cure thoroughly right inboard wing panel should have / washin Fin Cut part A-in soft balsa sheet outline shown plan Carve sand streamlined shape indicated Fuselage Select four /6 x 3A6 straight grained spruce strips longerons Carve triangular shape starting about 3 aft Section indicated plan Cut two fuselage sides /6 soft sheet balsa Pin side over plan glue longerons Insert %-in balsa bulkheads just forward aft pylon spacing shown plan Remove first fuselage side plan glue shaped longerons second side longerons dry tach side bulkheads making sure doing entire fuselage prop erly aligned Select sheet medium a fuselage bottom Sand smooth bottom two fuselage sides longerons con necting bulkheads glue entire assembly bottom sheet Pin entire structure flat surface desired Cut pylon very accurately hard %-in sheet balsa notch bulk heads glue firmly place Ensure perfectly vertical Sand smooth fuselage top attach /6 cover sheet along its entire length Glue 46 soft sheet pylon sides place Prepare wing stabilizer platforms shown plan Remove fuselage assembly plan dry Cut drill A-in ply wood firewall fit commercially available aluminum engine pans Install Electric Flight f Controller Perfect 05 Motors 510 cells LIghtweight 12 oo Adjustable switching pointmoney back Solderless tenninal easy hookup $2guarantee ON/OFF Controller495 Power save weight Very high efficiency O06V loss 20 5fre 22x13x63 Add 51ffl shippiog Colitorojo resideoto odd 65% $163 Too Send Chrek money order ooeooith11High Sky Fntaho comooto 3929 Kansas St #9 Otesooe San DlegocA 92104 blind mounting nuts epoxy firewall fuselage forward bulkhead shown plan File carve sand ward fuselage smooth configuration ensure clean junction engine mount Cover entire area fiber glass epoxy resin Sand balance fuselage smooth add wing stabilizer platforms Slot fuselage fin insert shown plan check alignment glue place Add %2 spruce dowel DT bands tubing ex ternal DT string Bend wing hooks /16 wire shown plan epoxy firmly place Sand smooth entire fuselage apply two coats clear dope Install engine DT timers normally apply two coats epoxy paint fuselage finish primarily because durable absolutely fuel-proof de sired however fuselage can tissue covered doped Ensure adequate fuel-proofing applied latter proce dure used original A-B Shrike used pressure fuel system illustrated plans photographs pen bladder pressure system can used preferred Install hot 15-23 size engine choice pre pare model flight testing Flight testing hot A-B model like Shrike first few test flights usually critical airplane passes crucible mishap remaining flights become easier Before attempting first test flight check model carefully proper align ment center-of-gravity location free dom warps test glide adjust plane necessary small increments packing under leading trailing edge stabilizer Hand glides should re veal slight right turn produced adjust ing stab tilt Once glide satisfactory ship ready its first power flight Set en gine timer three-second run start engine hand launch model gently wind about 450 el evation Climb should straight out angle launch slight right spiral observe tendency veer leftward climb correct immediately its generally fatal condition subsequent test flights increase length engine run flight pattern safety mention intestinal forti tude permit models gen eral design have required about %2 left rudder tab keep tail down during climbout /8 washin right board wing panel helps keep latter up during ascent word caution using Shrike interchangeably classes B repeat test procedure upon switching engines Nothing affects Shrikes climb pattern drastically major changes power ergo speed Unless abso lutely certain B engines have equal power output its prudent few short test flights after changing en gines full 9-to-12-second engine run model should make two full turns right during climb enter its glide pattern no stall loss altitude airplane built according plans flight patterns automatically will right-right Competition durability built shown ready-to-fly weight about 24 26 ounces opinion assuming hot engine used extra weight wont noticeably reduce performanceand rugged construction will carry model through several contest seasons Modelers limited building time simply prefer competing building will find Shrikes longevity great advantage risk being iconoclast offer suggestion enhance models du rability further minimize unnecessary testing Once wing stabilizer have aged model properly adjusted has proven competition-worthy little addi tional testing necessary Probably two three short DT flights before contest should suffice question philosophy will take moment recall folded wings damaged models lost Free Flight ships have expe rience traceable superfluous test flights think theyll concede point Battery Box/Render Continued page 73 wires strip 1/2 insulation end Placing spring plate equidistant between lines box bot tom mark mounting holes through wood sharp pencil photos shows spring plate position No tice uncut side opposite spring fingers approximately flush edge wood Drill pilot holes using 1A6 drill slight angle screw does split wood see drawing Mount spring plate screws trapping bared lamp cord under plate Its good idea 176 Model Aviation
Edition: Model Aviation - 1989/12
Page Numbers: 69, 70, 71, 175, 176
p Heres Free Flight Power model thats consistent ex tremely durable flier widely varying flight configurations Its refined over years very competitive AMA Cate gory II EWilliam H Langenberg THIS DESIGN larger modified ver sion Shrike previously published quite some time ago June 1975 Model Builder Though originally designed FAI Power advent such gadgets prop brakes auto tail surfaces made /2A Shrike obsolescent event refinements have potential increase performance FAI Power mod els view utilization requires almost monomaniacal devotion single event As longtime skeptic gadgets Free Flight models chose adapt Shrike AMA B Power classes has remained very compet itive During past 20 years have lived flown Free flight California Arizona Texas surrounding states least modelers standpoint regions show marked differences altitude ter rain climate wind patterns Probably meaningful evaluation can make Shrike its forebears same general design have demon strated consistency durability compet ing under widely varying conditions Originally flown under 20-second enDecember 1989 69 Top picture Shrike completed ready go relatively small rudder well aft sta bilizer clearly visible photo Above Left side front view showing engine de thermalizer timers generous wing dihedral greatly aids stability windy weather flying gine run five-minute max rules Shrike has refined over years com petitive 9-to-12-second power pattern three-minute maxes seem pre dominate today shrike curious predatory bird impales its prey thorns Fly ing fields bristle sorts hazards just lying wait vulnerable Free Flight ships model has met its doom impaled spears wheat stubble spikes barbed wire fences Shrike tougher order built shown plans flown intelligently rugged airplane should outlast its lighter weight competitors survive con test seasons design appeals aesthetic tastes seek consistent highly durable B model cuts down rebuilding time expanding competition time Shrike may answer Construction Stabilizer Beginning construction GIHEGRAL BREAK S S 1/16 BALSA SHEETING INBOARD SECTION NO FOR CLARITY7 ___ S/I CAP B 60 IN B GA 3/16NOT BALSA GUSSET S-S WINS MATCH LINE I/BS/4 BALSA I NO SF TRIPS SN WIS 1/4 BALSA SHEET LEFT WING TIP STABILIZER 1/4 BALSA SHEET 1/4 STOI RUGUER TA 1/16 LEFT FINFIN CR555 I_____ jSECTION 3/35 IGOWE I I/IA GIG ALUM TUBE FOR GT STRING K en VUCflCAI PLAN Left view shows some details geodetic wing structure silhouettes downthrust engine No variable-incidence tail autorudder other gadgets used Shrike Refer text authors reasoning Right Close-up view right side showing some fuel system details rather hefty landing skid engine operates off crankcase pressure steady fuel flow maximum rpm 70 Model Aviation striking right profile perspective shot shows off models sleek lines wire landing skid necessary prevent damage could result DT landings hard surfaces bottom view shows warp-resistant structural details wing elliptical wing stabilizer planforms give airplane pleasing appearance Left thrust obvious photo necessary order eliminate tendency swoop right after hand launch Full-Size Plans Available Page 202 1/ I/IA BALSAASS/IA RACKS SAHARACAP SABIPS RAINS PANELSI LBA SASACESA BALSA SPARSsNeER WING RIB PATTERN I/lA BALSA SHEET SEE WINS RIB BATTERN VIEW TOP B BDTTOM CENTER SECTION FOR LEADINS EDSE CONSTRSCTION1 II / 5/35 PLY BRACED DOUBLE/ / /16 #/BBLSA GUSSETS WIN I/B S I/H SPRU4 WINS SPDS TOP AND BSTTM-7 PLA VlE I/4I BALSA T K STOCKI/H 51/4 SPRUCE L K7 yR I/H BALSA 7 liii / HA BALSAESAS flEWPIE BALSA CIA IB SPRUCE STABILIZER PATTERNI/H 1/1K BALSA SPAR I/B 5 1/1K SPRUCE SPARS 3/IA BALSA ShEETTOP H BOTTOM MAIN 3/1K BALSA SHEET FUSELAGE SIDES TSP AND BOTTOM F-A F-S DOUBLE RIBS S/lK BALSA SHEET GUSSETS / 1/1K BALSA SHEETING CENTER SECTION TOP AND BOTTOM OMITTED FOR CLARITY F-SF-SF-S IIIII DIHEDRAL BALSAI/4SS BALSA BREAK/SHEET 2i75T11/1K B I/H BALSA ONLY _______SPARS TOP -I/HAl/B BALSA WINS TIP SPAR TOP B BOTTOM RIBS B DIAGONALS 1/4 BALSA SHEET STABILIZER 3/lB BALSA SHEET TRAILING EDGE 1/B PLYWOOD FIREWALL F-S F-I AII/ 42A4II [v32][b-1-10-1-10]] TOPVIEWI/H PLYWOOD/ S/IAGG SPRUCEFUSELAGEUB PLYWOODPYLON ID MADE OF FIREWALLALUMINUMIS/B DIA LONGERONG-CARUE/BALSA GREET CORE VESTENGINE FANDPINNER TO TRIANGLE SHAPE3/lA SD SPRUCEGRAIN B 3/IA BALSA5 LEFT THRUST FROM REAR OF PYLON/--j3/IA 5 BALSASHEET SIDED HORIZ GRAINI/IA DIA MUSIC WIRE TO REAR OF FUSELAG~///7lWINS PLATFORMGEE SECTIDNVIEWWING HOOKNOTE COVER FUSELAGE FORWARD SIDE VIEWpzvsLiV-//\OF PYLON WITH FIBERGLASS SEEAND EPOSY RESIN S/IA BALSA SHEETIS TO 23 ENGINE FUSE TOP B BOTTOMF-SF-4F3F 2 F-I 5 DOWN THRUST I/BBALSA SHEET-FORMERS FSLBALANCEBAA PROP THRUF-5A'- POINTI ES F-4 U-IJVFII -- -A-4-t --4--53/ TIMER FUSELAGE SIDE VIEW S/IA SO SPRUCE -WINS PLATFORM3/IA BALSALONGERSNS CARVE HEETTO TRIANGLE SHAPE FROM HERE BACK ~3/IA BALUA- 3/IA BALSA SHEET I/B BALSA -- NOTE GRAI BALSA SHEET 3/IA SD I-VBBALSA3/IA-SPRUCE SHEETBALSASECTION A-A N B-BSHEET SECTION AT PYLON ENGI NE TIMERLA I/H DIA MAGIC WIRE SKIS FIT INTO I/H U TUBE EPOSIES TO REAR OF F NOTE MOUNT DT B TIMERS ON LEFT SIDE OF FUSE MODEL AVIAT1ON A-B SHRIKE DESIGNED BY W H LANGENBERG 0 1 2 3 4 5 TRACING BY JOE DEMARCO -_____- ALL RIGHTS RESERVSD stabilizer allows part covered doped cured before test flying model withstand rigors dethermalizer DT landings enhance durability spruce used spars leading Continued page 175 Left Construction details stabilizer can seen photo Note warp resisting diagonals author used spruce spars lead ing edge strength durability Right shot shows stabilizer its dethermalized position stabilizer designed pop up about 45 degrees dethermalizer timer releases model will descend rapidly thermals inconvenient distance December 1989 71 DIHEDRAL BREAK BALSA T RIBS AG ORALS B BALSA SHEET IULKHEAD DY 3/IA BALSA SHEET SIDES tLtCTSS5IC CiRCUITRY REPLACES 555 URCHSSICAL ADVA5CR tar complete information send seltoddressed stamped best flight third round hut enough Nagy unable improve Hungarians continue favor widechord thick-section rock maple single-bladed propellers over thin carbon-fiber blades used other competitors As holder 25cc FAI world record UK s Paul Eisner person knows can get around pylon speeds approach ing 320 kph However use line ties FAI model F2A somewhat slower second-round speed close personal best good conditions Paul first flier third round took off just light hint rain within 10 seconds downpour model visibly slowed water density creased Swedens Stjarnesund suffered similar fate point flying suspended hour first two fliers allowed reflights Dick McGladdery reverse situation Eisner plagued throughout event engine suddenly being uncooper ative together model showing its best flying qualities windy weather Much hard practice eventually yielded flight 2795 kph second round third-round slower flight being disal lowed because handle-to-pylon problems MeGladdery like competitors did reach full potential Poland fielded full team headed ever-polite charming Andrezej Rachwal joined young son Tomasz Andre zej produced nicely built finished model powered reworked Rossi MK3 fitted own cast aluminum alloy pan own spun-aluminum fat boy large-volume tuned pipe Rachwals Rossi steel sleeve rear bearing housing better alignment permit use standard-size rear bearing Nee dle rollers used big end Andrezej re versed Breitenbach finishing order just managed pip MeGladdery event Theres little bit friendly rivalry developing Young Tomasz Rachwal would ex pected used setup similar fathers flew sensibly considering wind slight stature choosing enter pylon early let model wind up much speed come Tomaszs equipment lit tle stronger can develop flying technique third member Polish team Choj nacki managed 286 kph 86 world champs unable attain earlier form Rachwals flew wide-chord thick-section single-bladed carbon fiber replicas mapleMade Amerha III American Technology RIG & U/C ENGINES 15 thru 61 Glow Plugs & Spark Plugs Ignition Engines 29 35 ORIGINAL REPLACEMENT PARTS Kraft 61 Cox Conquest 15 Testor/McCoy Series 21 Taipan 40 HGK Forster Remco - Viking twin DC 09 diesel call write free information RJL Industries PO Box 5 - Sierra Ma&e CA 91024 818 359-0016 wood props used previous years Chojnacki stayed wood Italian team flew OPS power year stated earlier practiced harder longer anyone else unfortunately efforts fully rewarded Fuel richening during flight seemed problem engines coming near flooding off Frenchman Jean Magne suffered similar fate Italians uncharacteristic manner unable record timed run Moki powered model used large-volume Moki tuned pipe After first-round crash literally broke everything half French teammate Desloges fared much better record 27342 third round good see gentleman champs organizers commented youngster remembers reading about Mon sieur Desloges competing Speed 1953 Belgian Internationals Thats 36 years Speed flying Bulgarians suffered early-goodlaps-and-later-bad-laps syndrome will surely go much faster future remedy problem found Swedes Stjarnesund Fallgren used own machined-steel pipes did Ital ians Along fellow team member Kjellberg used variety enginesRossi Moki Picco strong runs plenty revs unfortunately speed match Like Bulgarians sure progress quickly near future Models upright engines centrifugal fuel switches used two contestants Luis Parramon Spain Gunter Rosenhan Federal Republic Germany Rosenhan has re cently testing Moki fitted Irvine pipe reported impressive gains rpm ex cess 1000 Unfortunately lack time de velop setup meant potential speeds approaching 280 kph could realized Rosenhan admitted being Catch 22 situation longtime CFS setup since due lack competitions flying partners Ger unable undertake extensive test flying required develop new suction fuel sys tem competition came close top two places being settled much forecast al beit lower speeds expected Kalmy kov becoming reigning European Champion addition being World Champion Peter Halmans superlative efforts Irvine 15 uses essentially standard form rewarded third place showing pro duction engine can easily live company hand-built Soviet specials Next years world champs held France near Metz competition should fierce See Editors note detailed listing re suits European CL Championships Speed event will found Competition Newslet ter section magazine RMcM AB Shrike/Langenberg Continued page 71 edge minimizing weight ultimate building criterion may substitute balsa although recommended stabilizer should covered tis sue given least three coats thinned dope generally prefer nitrate butyrate dope because appears less susceptible moisture changes air nitrate dope used coat fuel-proofer must ap plied final step See stabilizer absolutely free warps ensure remains strapping rubberbands flat board storage Wing relatively straightforward building techniques simplified flatbottomed airfoil have few problems Balsa may substituted spruce shown plans though again isnt rec ommended Select wood wing tips care should kept light possible two inboard wing panels ribs should cut %2 quarter grained stock trailing edges prefer ably carved A-in sheet balsa sim ilar grain Assemble wing panels polyhe dral dimensions indicated liberally gluing joints Install plywood gussets trian gular reinforcements shown Sand en tire completed structure carefully ensure attractive covering job recommend covering inboard wing panels GM silkspan silk over tissue latter method used first water shrink tissue apply coat dope December 1989 175 CAPACITIVEDISCHARGE IGNITION SYSTEM teaturing EJECTRQN1CALLY D1TR0ILEfl SPARK c unit99 MAKES MAGNtTS CO5VE5SIS5S SNAP! Free Flight Kits Supplies Rubber er Power Kits Scale Old Timer Too Co2 Electric Motors Rubber Tissue Cox ParIs Rubber Accessories Winding Hooks Timers Nitrate Dope CATALOGUE $200 CAMPBELLS CUSTOM KITS PO BOX 5996 LAKE WORTH FL 33466-5996 monthly publication covering International RC Soaring Scene US $17 yr 21/yr lstCiass Canada/Mexico S22/yr US funds Asia & Pacific $28/yr US funds Europe UK $28/yr US funds Surface Mall Foreign $18/yr US funds RO SOARING DIGEST PO Box 1079 Payson AZ 85547 before covering silk permits silk stretched tight dramatically re duces amount dope absorbs result very taut double covering relatively impervious changes temper ature moisture enhances torsional rigidity wing wing tips should tissue covered As stabilizer apply least three coats nitrate dope wing plus fuelproofer inboard panels Set wing aside allow cure thoroughly right inboard wing panel should have / washin Fin Cut part A-in soft balsa sheet outline shown plan Carve sand streamlined shape indicated Fuselage Select four /6 x 3A6 straight grained spruce strips longerons Carve triangular shape starting about 3 aft Section indicated plan Cut two fuselage sides /6 soft sheet balsa Pin side over plan glue longerons Insert %-in balsa bulkheads just forward aft pylon spacing shown plan Remove first fuselage side plan glue shaped longerons second side longerons dry tach side bulkheads making sure doing entire fuselage prop erly aligned Select sheet medium a fuselage bottom Sand smooth bottom two fuselage sides longerons con necting bulkheads glue entire assembly bottom sheet Pin entire structure flat surface desired Cut pylon very accurately hard %-in sheet balsa notch bulk heads glue firmly place Ensure perfectly vertical Sand smooth fuselage top attach /6 cover sheet along its entire length Glue 46 soft sheet pylon sides place Prepare wing stabilizer platforms shown plan Remove fuselage assembly plan dry Cut drill A-in ply wood firewall fit commercially available aluminum engine pans Install Electric Flight f Controller Perfect 05 Motors 510 cells LIghtweight 12 oo Adjustable switching pointmoney back Solderless tenninal easy hookup $2guarantee ON/OFF Controller495 Power save weight Very high efficiency O06V loss 20 5fre 22x13x63 Add 51ffl shippiog Colitorojo resideoto odd 65% $163 Too Send Chrek money order ooeooith11High Sky Fntaho comooto 3929 Kansas St #9 Otesooe San DlegocA 92104 blind mounting nuts epoxy firewall fuselage forward bulkhead shown plan File carve sand ward fuselage smooth configuration ensure clean junction engine mount Cover entire area fiber glass epoxy resin Sand balance fuselage smooth add wing stabilizer platforms Slot fuselage fin insert shown plan check alignment glue place Add %2 spruce dowel DT bands tubing ex ternal DT string Bend wing hooks /16 wire shown plan epoxy firmly place Sand smooth entire fuselage apply two coats clear dope Install engine DT timers normally apply two coats epoxy paint fuselage finish primarily because durable absolutely fuel-proof de sired however fuselage can tissue covered doped Ensure adequate fuel-proofing applied latter proce dure used original A-B Shrike used pressure fuel system illustrated plans photographs pen bladder pressure system can used preferred Install hot 15-23 size engine choice pre pare model flight testing Flight testing hot A-B model like Shrike first few test flights usually critical airplane passes crucible mishap remaining flights become easier Before attempting first test flight check model carefully proper align ment center-of-gravity location free dom warps test glide adjust plane necessary small increments packing under leading trailing edge stabilizer Hand glides should re veal slight right turn produced adjust ing stab tilt Once glide satisfactory ship ready its first power flight Set en gine timer three-second run start engine hand launch model gently wind about 450 el evation Climb should straight out angle launch slight right spiral observe tendency veer leftward climb correct immediately its generally fatal condition subsequent test flights increase length engine run flight pattern safety mention intestinal forti tude permit models gen eral design have required about %2 left rudder tab keep tail down during climbout /8 washin right board wing panel helps keep latter up during ascent word caution using Shrike interchangeably classes B repeat test procedure upon switching engines Nothing affects Shrikes climb pattern drastically major changes power ergo speed Unless abso lutely certain B engines have equal power output its prudent few short test flights after changing en gines full 9-to-12-second engine run model should make two full turns right during climb enter its glide pattern no stall loss altitude airplane built according plans flight patterns automatically will right-right Competition durability built shown ready-to-fly weight about 24 26 ounces opinion assuming hot engine used extra weight wont noticeably reduce performanceand rugged construction will carry model through several contest seasons Modelers limited building time simply prefer competing building will find Shrikes longevity great advantage risk being iconoclast offer suggestion enhance models du rability further minimize unnecessary testing Once wing stabilizer have aged model properly adjusted has proven competition-worthy little addi tional testing necessary Probably two three short DT flights before contest should suffice question philosophy will take moment recall folded wings damaged models lost Free Flight ships have expe rience traceable superfluous test flights think theyll concede point Battery Box/Render Continued page 73 wires strip 1/2 insulation end Placing spring plate equidistant between lines box bot tom mark mounting holes through wood sharp pencil photos shows spring plate position No tice uncut side opposite spring fingers approximately flush edge wood Drill pilot holes using 1A6 drill slight angle screw does split wood see drawing Mount spring plate screws trapping bared lamp cord under plate Its good idea 176 Model Aviation
Edition: Model Aviation - 1989/12
Page Numbers: 69, 70, 71, 175, 176
p Heres Free Flight Power model thats consistent ex tremely durable flier widely varying flight configurations Its refined over years very competitive AMA Cate gory II EWilliam H Langenberg THIS DESIGN larger modified ver sion Shrike previously published quite some time ago June 1975 Model Builder Though originally designed FAI Power advent such gadgets prop brakes auto tail surfaces made /2A Shrike obsolescent event refinements have potential increase performance FAI Power mod els view utilization requires almost monomaniacal devotion single event As longtime skeptic gadgets Free Flight models chose adapt Shrike AMA B Power classes has remained very compet itive During past 20 years have lived flown Free flight California Arizona Texas surrounding states least modelers standpoint regions show marked differences altitude ter rain climate wind patterns Probably meaningful evaluation can make Shrike its forebears same general design have demon strated consistency durability compet ing under widely varying conditions Originally flown under 20-second enDecember 1989 69 Top picture Shrike completed ready go relatively small rudder well aft sta bilizer clearly visible photo Above Left side front view showing engine de thermalizer timers generous wing dihedral greatly aids stability windy weather flying gine run five-minute max rules Shrike has refined over years com petitive 9-to-12-second power pattern three-minute maxes seem pre dominate today shrike curious predatory bird impales its prey thorns Fly ing fields bristle sorts hazards just lying wait vulnerable Free Flight ships model has met its doom impaled spears wheat stubble spikes barbed wire fences Shrike tougher order built shown plans flown intelligently rugged airplane should outlast its lighter weight competitors survive con test seasons design appeals aesthetic tastes seek consistent highly durable B model cuts down rebuilding time expanding competition time Shrike may answer Construction Stabilizer Beginning construction GIHEGRAL BREAK S S 1/16 BALSA SHEETING INBOARD SECTION NO FOR CLARITY7 ___ S/I CAP B 60 IN B GA 3/16NOT BALSA GUSSET S-S WINS MATCH LINE I/BS/4 BALSA I NO SF TRIPS SN WIS 1/4 BALSA SHEET LEFT WING TIP STABILIZER 1/4 BALSA SHEET 1/4 STOI RUGUER TA 1/16 LEFT FINFIN CR555 I_____ jSECTION 3/35 IGOWE I I/IA GIG ALUM TUBE FOR GT STRING K en VUCflCAI PLAN Left view shows some details geodetic wing structure silhouettes downthrust engine No variable-incidence tail autorudder other gadgets used Shrike Refer text authors reasoning Right Close-up view right side showing some fuel system details rather hefty landing skid engine operates off crankcase pressure steady fuel flow maximum rpm 70 Model Aviation striking right profile perspective shot shows off models sleek lines wire landing skid necessary prevent damage could result DT landings hard surfaces bottom view shows warp-resistant structural details wing elliptical wing stabilizer planforms give airplane pleasing appearance Left thrust obvious photo necessary order eliminate tendency swoop right after hand launch Full-Size Plans Available Page 202 1/ I/IA BALSAASS/IA RACKS SAHARACAP SABIPS RAINS PANELSI LBA SASACESA BALSA SPARSsNeER WING RIB PATTERN I/lA BALSA SHEET SEE WINS RIB BATTERN VIEW TOP B BDTTOM CENTER SECTION FOR LEADINS EDSE CONSTRSCTION1 II / 5/35 PLY BRACED DOUBLE/ / /16 #/BBLSA GUSSETS WIN I/B S I/H SPRU4 WINS SPDS TOP AND BSTTM-7 PLA VlE I/4I BALSA T K STOCKI/H 51/4 SPRUCE L K7 yR I/H BALSA 7 liii / HA BALSAESAS flEWPIE BALSA CIA IB SPRUCE STABILIZER PATTERNI/H 1/1K BALSA SPAR I/B 5 1/1K SPRUCE SPARS 3/IA BALSA ShEETTOP H BOTTOM MAIN 3/1K BALSA SHEET FUSELAGE SIDES TSP AND BOTTOM F-A F-S DOUBLE RIBS S/lK BALSA SHEET GUSSETS / 1/1K BALSA SHEETING CENTER SECTION TOP AND BOTTOM OMITTED FOR CLARITY F-SF-SF-S IIIII DIHEDRAL BALSAI/4SS BALSA BREAK/SHEET 2i75T11/1K B I/H BALSA ONLY _______SPARS TOP -I/HAl/B BALSA WINS TIP SPAR TOP B BOTTOM RIBS B DIAGONALS 1/4 BALSA SHEET STABILIZER 3/lB BALSA SHEET TRAILING EDGE 1/B PLYWOOD FIREWALL F-S F-I AII/ 42A4II [v32][b-1-10-1-10]] TOPVIEWI/H PLYWOOD/ S/IAGG SPRUCEFUSELAGEUB PLYWOODPYLON ID MADE OF FIREWALLALUMINUMIS/B DIA LONGERONG-CARUE/BALSA GREET CORE VESTENGINE FANDPINNER TO TRIANGLE SHAPE3/lA SD SPRUCEGRAIN B 3/IA BALSA5 LEFT THRUST FROM REAR OF PYLON/--j3/IA 5 BALSASHEET SIDED HORIZ GRAINI/IA DIA MUSIC WIRE TO REAR OF FUSELAG~///7lWINS PLATFORMGEE SECTIDNVIEWWING HOOKNOTE COVER FUSELAGE FORWARD SIDE VIEWpzvsLiV-//\OF PYLON WITH FIBERGLASS SEEAND EPOSY RESIN S/IA BALSA SHEETIS TO 23 ENGINE FUSE TOP B BOTTOMF-SF-4F3F 2 F-I 5 DOWN THRUST I/BBALSA SHEET-FORMERS FSLBALANCEBAA PROP THRUF-5A'- POINTI ES F-4 U-IJVFII -- -A-4-t --4--53/ TIMER FUSELAGE SIDE VIEW S/IA SO SPRUCE -WINS PLATFORM3/IA BALSALONGERSNS CARVE HEETTO TRIANGLE SHAPE FROM HERE BACK ~3/IA BALUA- 3/IA BALSA SHEET I/B BALSA -- NOTE GRAI BALSA SHEET 3/IA SD I-VBBALSA3/IA-SPRUCE SHEETBALSASECTION A-A N B-BSHEET SECTION AT PYLON ENGI NE TIMERLA I/H DIA MAGIC WIRE SKIS FIT INTO I/H U TUBE EPOSIES TO REAR OF F NOTE MOUNT DT B TIMERS ON LEFT SIDE OF FUSE MODEL AVIAT1ON A-B SHRIKE DESIGNED BY W H LANGENBERG 0 1 2 3 4 5 TRACING BY JOE DEMARCO -_____- ALL RIGHTS RESERVSD stabilizer allows part covered doped cured before test flying model withstand rigors dethermalizer DT landings enhance durability spruce used spars leading Continued page 175 Left Construction details stabilizer can seen photo Note warp resisting diagonals author used spruce spars lead ing edge strength durability Right shot shows stabilizer its dethermalized position stabilizer designed pop up about 45 degrees dethermalizer timer releases model will descend rapidly thermals inconvenient distance December 1989 71 DIHEDRAL BREAK BALSA T RIBS AG ORALS B BALSA SHEET IULKHEAD DY 3/IA BALSA SHEET SIDES tLtCTSS5IC CiRCUITRY REPLACES 555 URCHSSICAL ADVA5CR tar complete information send seltoddressed stamped best flight third round hut enough Nagy unable improve Hungarians continue favor widechord thick-section rock maple single-bladed propellers over thin carbon-fiber blades used other competitors As holder 25cc FAI world record UK s Paul Eisner person knows can get around pylon speeds approach ing 320 kph However use line ties FAI model F2A somewhat slower second-round speed close personal best good conditions Paul first flier third round took off just light hint rain within 10 seconds downpour model visibly slowed water density creased Swedens Stjarnesund suffered similar fate point flying suspended hour first two fliers allowed reflights Dick McGladdery reverse situation Eisner plagued throughout event engine suddenly being uncooper ative together model showing its best flying qualities windy weather Much hard practice eventually yielded flight 2795 kph second round third-round slower flight being disal lowed because handle-to-pylon problems MeGladdery like competitors did reach full potential Poland fielded full team headed ever-polite charming Andrezej Rachwal joined young son Tomasz Andre zej produced nicely built finished model powered reworked Rossi MK3 fitted own cast aluminum alloy pan own spun-aluminum fat boy large-volume tuned pipe Rachwals Rossi steel sleeve rear bearing housing better alignment permit use standard-size rear bearing Nee dle rollers used big end Andrezej re versed Breitenbach finishing order just managed pip MeGladdery event Theres little bit friendly rivalry developing Young Tomasz Rachwal would ex pected used setup similar fathers flew sensibly considering wind slight stature choosing enter pylon early let model wind up much speed come Tomaszs equipment lit tle stronger can develop flying technique third member Polish team Choj nacki managed 286 kph 86 world champs unable attain earlier form Rachwals flew wide-chord thick-section single-bladed carbon fiber replicas mapleMade Amerha III American Technology RIG & U/C ENGINES 15 thru 61 Glow Plugs & Spark Plugs Ignition Engines 29 35 ORIGINAL REPLACEMENT PARTS Kraft 61 Cox Conquest 15 Testor/McCoy Series 21 Taipan 40 HGK Forster Remco - Viking twin DC 09 diesel call write free information RJL Industries PO Box 5 - Sierra Ma&e CA 91024 818 359-0016 wood props used previous years Chojnacki stayed wood Italian team flew OPS power year stated earlier practiced harder longer anyone else unfortunately efforts fully rewarded Fuel richening during flight seemed problem engines coming near flooding off Frenchman Jean Magne suffered similar fate Italians uncharacteristic manner unable record timed run Moki powered model used large-volume Moki tuned pipe After first-round crash literally broke everything half French teammate Desloges fared much better record 27342 third round good see gentleman champs organizers commented youngster remembers reading about Mon sieur Desloges competing Speed 1953 Belgian Internationals Thats 36 years Speed flying Bulgarians suffered early-goodlaps-and-later-bad-laps syndrome will surely go much faster future remedy problem found Swedes Stjarnesund Fallgren used own machined-steel pipes did Ital ians Along fellow team member Kjellberg used variety enginesRossi Moki Picco strong runs plenty revs unfortunately speed match Like Bulgarians sure progress quickly near future Models upright engines centrifugal fuel switches used two contestants Luis Parramon Spain Gunter Rosenhan Federal Republic Germany Rosenhan has re cently testing Moki fitted Irvine pipe reported impressive gains rpm ex cess 1000 Unfortunately lack time de velop setup meant potential speeds approaching 280 kph could realized Rosenhan admitted being Catch 22 situation longtime CFS setup since due lack competitions flying partners Ger unable undertake extensive test flying required develop new suction fuel sys tem competition came close top two places being settled much forecast al beit lower speeds expected Kalmy kov becoming reigning European Champion addition being World Champion Peter Halmans superlative efforts Irvine 15 uses essentially standard form rewarded third place showing pro duction engine can easily live company hand-built Soviet specials Next years world champs held France near Metz competition should fierce See Editors note detailed listing re suits European CL Championships Speed event will found Competition Newslet ter section magazine RMcM AB Shrike/Langenberg Continued page 71 edge minimizing weight ultimate building criterion may substitute balsa although recommended stabilizer should covered tis sue given least three coats thinned dope generally prefer nitrate butyrate dope because appears less susceptible moisture changes air nitrate dope used coat fuel-proofer must ap plied final step See stabilizer absolutely free warps ensure remains strapping rubberbands flat board storage Wing relatively straightforward building techniques simplified flatbottomed airfoil have few problems Balsa may substituted spruce shown plans though again isnt rec ommended Select wood wing tips care should kept light possible two inboard wing panels ribs should cut %2 quarter grained stock trailing edges prefer ably carved A-in sheet balsa sim ilar grain Assemble wing panels polyhe dral dimensions indicated liberally gluing joints Install plywood gussets trian gular reinforcements shown Sand en tire completed structure carefully ensure attractive covering job recommend covering inboard wing panels GM silkspan silk over tissue latter method used first water shrink tissue apply coat dope December 1989 175 CAPACITIVEDISCHARGE IGNITION SYSTEM teaturing EJECTRQN1CALLY D1TR0ILEfl SPARK c unit99 MAKES MAGNtTS CO5VE5SIS5S SNAP! Free Flight Kits Supplies Rubber er Power Kits Scale Old Timer Too Co2 Electric Motors Rubber Tissue Cox ParIs Rubber Accessories Winding Hooks Timers Nitrate Dope CATALOGUE $200 CAMPBELLS CUSTOM KITS PO BOX 5996 LAKE WORTH FL 33466-5996 monthly publication covering International RC Soaring Scene US $17 yr 21/yr lstCiass Canada/Mexico S22/yr US funds Asia & Pacific $28/yr US funds Europe UK $28/yr US funds Surface Mall Foreign $18/yr US funds RO SOARING DIGEST PO Box 1079 Payson AZ 85547 before covering silk permits silk stretched tight dramatically re duces amount dope absorbs result very taut double covering relatively impervious changes temper ature moisture enhances torsional rigidity wing wing tips should tissue covered As stabilizer apply least three coats nitrate dope wing plus fuelproofer inboard panels Set wing aside allow cure thoroughly right inboard wing panel should have / washin Fin Cut part A-in soft balsa sheet outline shown plan Carve sand streamlined shape indicated Fuselage Select four /6 x 3A6 straight grained spruce strips longerons Carve triangular shape starting about 3 aft Section indicated plan Cut two fuselage sides /6 soft sheet balsa Pin side over plan glue longerons Insert %-in balsa bulkheads just forward aft pylon spacing shown plan Remove first fuselage side plan glue shaped longerons second side longerons dry tach side bulkheads making sure doing entire fuselage prop erly aligned Select sheet medium a fuselage bottom Sand smooth bottom two fuselage sides longerons con necting bulkheads glue entire assembly bottom sheet Pin entire structure flat surface desired Cut pylon very accurately hard %-in sheet balsa notch bulk heads glue firmly place Ensure perfectly vertical Sand smooth fuselage top attach /6 cover sheet along its entire length Glue 46 soft sheet pylon sides place Prepare wing stabilizer platforms shown plan Remove fuselage assembly plan dry Cut drill A-in ply wood firewall fit commercially available aluminum engine pans Install Electric Flight f Controller Perfect 05 Motors 510 cells LIghtweight 12 oo Adjustable switching pointmoney back Solderless tenninal easy hookup $2guarantee ON/OFF Controller495 Power save weight Very high efficiency O06V loss 20 5fre 22x13x63 Add 51ffl shippiog Colitorojo resideoto odd 65% $163 Too Send Chrek money order ooeooith11High Sky Fntaho comooto 3929 Kansas St #9 Otesooe San DlegocA 92104 blind mounting nuts epoxy firewall fuselage forward bulkhead shown plan File carve sand ward fuselage smooth configuration ensure clean junction engine mount Cover entire area fiber glass epoxy resin Sand balance fuselage smooth add wing stabilizer platforms Slot fuselage fin insert shown plan check alignment glue place Add %2 spruce dowel DT bands tubing ex ternal DT string Bend wing hooks /16 wire shown plan epoxy firmly place Sand smooth entire fuselage apply two coats clear dope Install engine DT timers normally apply two coats epoxy paint fuselage finish primarily because durable absolutely fuel-proof de sired however fuselage can tissue covered doped Ensure adequate fuel-proofing applied latter proce dure used original A-B Shrike used pressure fuel system illustrated plans photographs pen bladder pressure system can used preferred Install hot 15-23 size engine choice pre pare model flight testing Flight testing hot A-B model like Shrike first few test flights usually critical airplane passes crucible mishap remaining flights become easier Before attempting first test flight check model carefully proper align ment center-of-gravity location free dom warps test glide adjust plane necessary small increments packing under leading trailing edge stabilizer Hand glides should re veal slight right turn produced adjust ing stab tilt Once glide satisfactory ship ready its first power flight Set en gine timer three-second run start engine hand launch model gently wind about 450 el evation Climb should straight out angle launch slight right spiral observe tendency veer leftward climb correct immediately its generally fatal condition subsequent test flights increase length engine run flight pattern safety mention intestinal forti tude permit models gen eral design have required about %2 left rudder tab keep tail down during climbout /8 washin right board wing panel helps keep latter up during ascent word caution using Shrike interchangeably classes B repeat test procedure upon switching engines Nothing affects Shrikes climb pattern drastically major changes power ergo speed Unless abso lutely certain B engines have equal power output its prudent few short test flights after changing en gines full 9-to-12-second engine run model should make two full turns right during climb enter its glide pattern no stall loss altitude airplane built according plans flight patterns automatically will right-right Competition durability built shown ready-to-fly weight about 24 26 ounces opinion assuming hot engine used extra weight wont noticeably reduce performanceand rugged construction will carry model through several contest seasons Modelers limited building time simply prefer competing building will find Shrikes longevity great advantage risk being iconoclast offer suggestion enhance models du rability further minimize unnecessary testing Once wing stabilizer have aged model properly adjusted has proven competition-worthy little addi tional testing necessary Probably two three short DT flights before contest should suffice question philosophy will take moment recall folded wings damaged models lost Free Flight ships have expe rience traceable superfluous test flights think theyll concede point Battery Box/Render Continued page 73 wires strip 1/2 insulation end Placing spring plate equidistant between lines box bot tom mark mounting holes through wood sharp pencil photos shows spring plate position No tice uncut side opposite spring fingers approximately flush edge wood Drill pilot holes using 1A6 drill slight angle screw does split wood see drawing Mount spring plate screws trapping bared lamp cord under plate Its good idea 176 Model Aviation
Edition: Model Aviation - 1989/12
Page Numbers: 69, 70, 71, 175, 176
p Heres Free Flight Power model thats consistent ex tremely durable flier widely varying flight configurations Its refined over years very competitive AMA Cate gory II EWilliam H Langenberg THIS DESIGN larger modified ver sion Shrike previously published quite some time ago June 1975 Model Builder Though originally designed FAI Power advent such gadgets prop brakes auto tail surfaces made /2A Shrike obsolescent event refinements have potential increase performance FAI Power mod els view utilization requires almost monomaniacal devotion single event As longtime skeptic gadgets Free Flight models chose adapt Shrike AMA B Power classes has remained very compet itive During past 20 years have lived flown Free flight California Arizona Texas surrounding states least modelers standpoint regions show marked differences altitude ter rain climate wind patterns Probably meaningful evaluation can make Shrike its forebears same general design have demon strated consistency durability compet ing under widely varying conditions Originally flown under 20-second enDecember 1989 69 Top picture Shrike completed ready go relatively small rudder well aft sta bilizer clearly visible photo Above Left side front view showing engine de thermalizer timers generous wing dihedral greatly aids stability windy weather flying gine run five-minute max rules Shrike has refined over years com petitive 9-to-12-second power pattern three-minute maxes seem pre dominate today shrike curious predatory bird impales its prey thorns Fly ing fields bristle sorts hazards just lying wait vulnerable Free Flight ships model has met its doom impaled spears wheat stubble spikes barbed wire fences Shrike tougher order built shown plans flown intelligently rugged airplane should outlast its lighter weight competitors survive con test seasons design appeals aesthetic tastes seek consistent highly durable B model cuts down rebuilding time expanding competition time Shrike may answer Construction Stabilizer Beginning construction GIHEGRAL BREAK S S 1/16 BALSA SHEETING INBOARD SECTION NO FOR CLARITY7 ___ S/I CAP B 60 IN B GA 3/16NOT BALSA GUSSET S-S WINS MATCH LINE I/BS/4 BALSA I NO SF TRIPS SN WIS 1/4 BALSA SHEET LEFT WING TIP STABILIZER 1/4 BALSA SHEET 1/4 STOI RUGUER TA 1/16 LEFT FINFIN CR555 I_____ jSECTION 3/35 IGOWE I I/IA GIG ALUM TUBE FOR GT STRING K en VUCflCAI PLAN Left view shows some details geodetic wing structure silhouettes downthrust engine No variable-incidence tail autorudder other gadgets used Shrike Refer text authors reasoning Right Close-up view right side showing some fuel system details rather hefty landing skid engine operates off crankcase pressure steady fuel flow maximum rpm 70 Model Aviation striking right profile perspective shot shows off models sleek lines wire landing skid necessary prevent damage could result DT landings hard surfaces bottom view shows warp-resistant structural details wing elliptical wing stabilizer planforms give airplane pleasing appearance Left thrust obvious photo necessary order eliminate tendency swoop right after hand launch Full-Size Plans Available Page 202 1/ I/IA BALSAASS/IA RACKS SAHARACAP SABIPS RAINS PANELSI LBA SASACESA BALSA SPARSsNeER WING RIB PATTERN I/lA BALSA SHEET SEE WINS RIB BATTERN VIEW TOP B BDTTOM CENTER SECTION FOR LEADINS EDSE CONSTRSCTION1 II / 5/35 PLY BRACED DOUBLE/ / /16 #/BBLSA GUSSETS WIN I/B S I/H SPRU4 WINS SPDS TOP AND BSTTM-7 PLA VlE I/4I BALSA T K STOCKI/H 51/4 SPRUCE L K7 yR I/H BALSA 7 liii / HA BALSAESAS flEWPIE BALSA CIA IB SPRUCE STABILIZER PATTERNI/H 1/1K BALSA SPAR I/B 5 1/1K SPRUCE SPARS 3/IA BALSA ShEETTOP H BOTTOM MAIN 3/1K BALSA SHEET FUSELAGE SIDES TSP AND BOTTOM F-A F-S DOUBLE RIBS S/lK BALSA SHEET GUSSETS / 1/1K BALSA SHEETING CENTER SECTION TOP AND BOTTOM OMITTED FOR CLARITY F-SF-SF-S IIIII DIHEDRAL BALSAI/4SS BALSA BREAK/SHEET 2i75T11/1K B I/H BALSA ONLY _______SPARS TOP -I/HAl/B BALSA WINS TIP SPAR TOP B BOTTOM RIBS B DIAGONALS 1/4 BALSA SHEET STABILIZER 3/lB BALSA SHEET TRAILING EDGE 1/B PLYWOOD FIREWALL F-S F-I AII/ 42A4II [v32][b-1-10-1-10]] TOPVIEWI/H PLYWOOD/ S/IAGG SPRUCEFUSELAGEUB PLYWOODPYLON ID MADE OF FIREWALLALUMINUMIS/B DIA LONGERONG-CARUE/BALSA GREET CORE VESTENGINE FANDPINNER TO TRIANGLE SHAPE3/lA SD SPRUCEGRAIN B 3/IA BALSA5 LEFT THRUST FROM REAR OF PYLON/--j3/IA 5 BALSASHEET SIDED HORIZ GRAINI/IA DIA MUSIC WIRE TO REAR OF FUSELAG~///7lWINS PLATFORMGEE SECTIDNVIEWWING HOOKNOTE COVER FUSELAGE FORWARD SIDE VIEWpzvsLiV-//\OF PYLON WITH FIBERGLASS SEEAND EPOSY RESIN S/IA BALSA SHEETIS TO 23 ENGINE FUSE TOP B BOTTOMF-SF-4F3F 2 F-I 5 DOWN THRUST I/BBALSA SHEET-FORMERS FSLBALANCEBAA PROP THRUF-5A'- POINTI ES F-4 U-IJVFII -- -A-4-t --4--53/ TIMER FUSELAGE SIDE VIEW S/IA SO SPRUCE -WINS PLATFORM3/IA BALSALONGERSNS CARVE HEETTO TRIANGLE SHAPE FROM HERE BACK ~3/IA BALUA- 3/IA BALSA SHEET I/B BALSA -- NOTE GRAI BALSA SHEET 3/IA SD I-VBBALSA3/IA-SPRUCE SHEETBALSASECTION A-A N B-BSHEET SECTION AT PYLON ENGI NE TIMERLA I/H DIA MAGIC WIRE SKIS FIT INTO I/H U TUBE EPOSIES TO REAR OF F NOTE MOUNT DT B TIMERS ON LEFT SIDE OF FUSE MODEL AVIAT1ON A-B SHRIKE DESIGNED BY W H LANGENBERG 0 1 2 3 4 5 TRACING BY JOE DEMARCO -_____- ALL RIGHTS RESERVSD stabilizer allows part covered doped cured before test flying model withstand rigors dethermalizer DT landings enhance durability spruce used spars leading Continued page 175 Left Construction details stabilizer can seen photo Note warp resisting diagonals author used spruce spars lead ing edge strength durability Right shot shows stabilizer its dethermalized position stabilizer designed pop up about 45 degrees dethermalizer timer releases model will descend rapidly thermals inconvenient distance December 1989 71 DIHEDRAL BREAK BALSA T RIBS AG ORALS B BALSA SHEET IULKHEAD DY 3/IA BALSA SHEET SIDES tLtCTSS5IC CiRCUITRY REPLACES 555 URCHSSICAL ADVA5CR tar complete information send seltoddressed stamped best flight third round hut enough Nagy unable improve Hungarians continue favor widechord thick-section rock maple single-bladed propellers over thin carbon-fiber blades used other competitors As holder 25cc FAI world record UK s Paul Eisner person knows can get around pylon speeds approach ing 320 kph However use line ties FAI model F2A somewhat slower second-round speed close personal best good conditions Paul first flier third round took off just light hint rain within 10 seconds downpour model visibly slowed water density creased Swedens Stjarnesund suffered similar fate point flying suspended hour first two fliers allowed reflights Dick McGladdery reverse situation Eisner plagued throughout event engine suddenly being uncooper ative together model showing its best flying qualities windy weather Much hard practice eventually yielded flight 2795 kph second round third-round slower flight being disal lowed because handle-to-pylon problems MeGladdery like competitors did reach full potential Poland fielded full team headed ever-polite charming Andrezej Rachwal joined young son Tomasz Andre zej produced nicely built finished model powered reworked Rossi MK3 fitted own cast aluminum alloy pan own spun-aluminum fat boy large-volume tuned pipe Rachwals Rossi steel sleeve rear bearing housing better alignment permit use standard-size rear bearing Nee dle rollers used big end Andrezej re versed Breitenbach finishing order just managed pip MeGladdery event Theres little bit friendly rivalry developing Young Tomasz Rachwal would ex pected used setup similar fathers flew sensibly considering wind slight stature choosing enter pylon early let model wind up much speed come Tomaszs equipment lit tle stronger can develop flying technique third member Polish team Choj nacki managed 286 kph 86 world champs unable attain earlier form Rachwals flew wide-chord thick-section single-bladed carbon fiber replicas mapleMade Amerha III American Technology RIG & U/C ENGINES 15 thru 61 Glow Plugs & Spark Plugs Ignition Engines 29 35 ORIGINAL REPLACEMENT PARTS Kraft 61 Cox Conquest 15 Testor/McCoy Series 21 Taipan 40 HGK Forster Remco - Viking twin DC 09 diesel call write free information RJL Industries PO Box 5 - Sierra Ma&e CA 91024 818 359-0016 wood props used previous years Chojnacki stayed wood Italian team flew OPS power year stated earlier practiced harder longer anyone else unfortunately efforts fully rewarded Fuel richening during flight seemed problem engines coming near flooding off Frenchman Jean Magne suffered similar fate Italians uncharacteristic manner unable record timed run Moki powered model used large-volume Moki tuned pipe After first-round crash literally broke everything half French teammate Desloges fared much better record 27342 third round good see gentleman champs organizers commented youngster remembers reading about Mon sieur Desloges competing Speed 1953 Belgian Internationals Thats 36 years Speed flying Bulgarians suffered early-goodlaps-and-later-bad-laps syndrome will surely go much faster future remedy problem found Swedes Stjarnesund Fallgren used own machined-steel pipes did Ital ians Along fellow team member Kjellberg used variety enginesRossi Moki Picco strong runs plenty revs unfortunately speed match Like Bulgarians sure progress quickly near future Models upright engines centrifugal fuel switches used two contestants Luis Parramon Spain Gunter Rosenhan Federal Republic Germany Rosenhan has re cently testing Moki fitted Irvine pipe reported impressive gains rpm ex cess 1000 Unfortunately lack time de velop setup meant potential speeds approaching 280 kph could realized Rosenhan admitted being Catch 22 situation longtime CFS setup since due lack competitions flying partners Ger unable undertake extensive test flying required develop new suction fuel sys tem competition came close top two places being settled much forecast al beit lower speeds expected Kalmy kov becoming reigning European Champion addition being World Champion Peter Halmans superlative efforts Irvine 15 uses essentially standard form rewarded third place showing pro duction engine can easily live company hand-built Soviet specials Next years world champs held France near Metz competition should fierce See Editors note detailed listing re suits European CL Championships Speed event will found Competition Newslet ter section magazine RMcM AB Shrike/Langenberg Continued page 71 edge minimizing weight ultimate building criterion may substitute balsa although recommended stabilizer should covered tis sue given least three coats thinned dope generally prefer nitrate butyrate dope because appears less susceptible moisture changes air nitrate dope used coat fuel-proofer must ap plied final step See stabilizer absolutely free warps ensure remains strapping rubberbands flat board storage Wing relatively straightforward building techniques simplified flatbottomed airfoil have few problems Balsa may substituted spruce shown plans though again isnt rec ommended Select wood wing tips care should kept light possible two inboard wing panels ribs should cut %2 quarter grained stock trailing edges prefer ably carved A-in sheet balsa sim ilar grain Assemble wing panels polyhe dral dimensions indicated liberally gluing joints Install plywood gussets trian gular reinforcements shown Sand en tire completed structure carefully ensure attractive covering job recommend covering inboard wing panels GM silkspan silk over tissue latter method used first water shrink tissue apply coat dope December 1989 175 CAPACITIVEDISCHARGE IGNITION SYSTEM teaturing EJECTRQN1CALLY D1TR0ILEfl SPARK c unit99 MAKES MAGNtTS CO5VE5SIS5S SNAP! Free Flight Kits Supplies Rubber er Power Kits Scale Old Timer Too Co2 Electric Motors Rubber Tissue Cox ParIs Rubber Accessories Winding Hooks Timers Nitrate Dope CATALOGUE $200 CAMPBELLS CUSTOM KITS PO BOX 5996 LAKE WORTH FL 33466-5996 monthly publication covering International RC Soaring Scene US $17 yr 21/yr lstCiass Canada/Mexico S22/yr US funds Asia & Pacific $28/yr US funds Europe UK $28/yr US funds Surface Mall Foreign $18/yr US funds RO SOARING DIGEST PO Box 1079 Payson AZ 85547 before covering silk permits silk stretched tight dramatically re duces amount dope absorbs result very taut double covering relatively impervious changes temper ature moisture enhances torsional rigidity wing wing tips should tissue covered As stabilizer apply least three coats nitrate dope wing plus fuelproofer inboard panels Set wing aside allow cure thoroughly right inboard wing panel should have / washin Fin Cut part A-in soft balsa sheet outline shown plan Carve sand streamlined shape indicated Fuselage Select four /6 x 3A6 straight grained spruce strips longerons Carve triangular shape starting about 3 aft Section indicated plan Cut two fuselage sides /6 soft sheet balsa Pin side over plan glue longerons Insert %-in balsa bulkheads just forward aft pylon spacing shown plan Remove first fuselage side plan glue shaped longerons second side longerons dry tach side bulkheads making sure doing entire fuselage prop erly aligned Select sheet medium a fuselage bottom Sand smooth bottom two fuselage sides longerons con necting bulkheads glue entire assembly bottom sheet Pin entire structure flat surface desired Cut pylon very accurately hard %-in sheet balsa notch bulk heads glue firmly place Ensure perfectly vertical Sand smooth fuselage top attach /6 cover sheet along its entire length Glue 46 soft sheet pylon sides place Prepare wing stabilizer platforms shown plan Remove fuselage assembly plan dry Cut drill A-in ply wood firewall fit commercially available aluminum engine pans Install Electric Flight f Controller Perfect 05 Motors 510 cells LIghtweight 12 oo Adjustable switching pointmoney back Solderless tenninal easy hookup $2guarantee ON/OFF Controller495 Power save weight Very high efficiency O06V loss 20 5fre 22x13x63 Add 51ffl shippiog Colitorojo resideoto odd 65% $163 Too Send Chrek money order ooeooith11High Sky Fntaho comooto 3929 Kansas St #9 Otesooe San DlegocA 92104 blind mounting nuts epoxy firewall fuselage forward bulkhead shown plan File carve sand ward fuselage smooth configuration ensure clean junction engine mount Cover entire area fiber glass epoxy resin Sand balance fuselage smooth add wing stabilizer platforms Slot fuselage fin insert shown plan check alignment glue place Add %2 spruce dowel DT bands tubing ex ternal DT string Bend wing hooks /16 wire shown plan epoxy firmly place Sand smooth entire fuselage apply two coats clear dope Install engine DT timers normally apply two coats epoxy paint fuselage finish primarily because durable absolutely fuel-proof de sired however fuselage can tissue covered doped Ensure adequate fuel-proofing applied latter proce dure used original A-B Shrike used pressure fuel system illustrated plans photographs pen bladder pressure system can used preferred Install hot 15-23 size engine choice pre pare model flight testing Flight testing hot A-B model like Shrike first few test flights usually critical airplane passes crucible mishap remaining flights become easier Before attempting first test flight check model carefully proper align ment center-of-gravity location free dom warps test glide adjust plane necessary small increments packing under leading trailing edge stabilizer Hand glides should re veal slight right turn produced adjust ing stab tilt Once glide satisfactory ship ready its first power flight Set en gine timer three-second run start engine hand launch model gently wind about 450 el evation Climb should straight out angle launch slight right spiral observe tendency veer leftward climb correct immediately its generally fatal condition subsequent test flights increase length engine run flight pattern safety mention intestinal forti tude permit models gen eral design have required about %2 left rudder tab keep tail down during climbout /8 washin right board wing panel helps keep latter up during ascent word caution using Shrike interchangeably classes B repeat test procedure upon switching engines Nothing affects Shrikes climb pattern drastically major changes power ergo speed Unless abso lutely certain B engines have equal power output its prudent few short test flights after changing en gines full 9-to-12-second engine run model should make two full turns right during climb enter its glide pattern no stall loss altitude airplane built according plans flight patterns automatically will right-right Competition durability built shown ready-to-fly weight about 24 26 ounces opinion assuming hot engine used extra weight wont noticeably reduce performanceand rugged construction will carry model through several contest seasons Modelers limited building time simply prefer competing building will find Shrikes longevity great advantage risk being iconoclast offer suggestion enhance models du rability further minimize unnecessary testing Once wing stabilizer have aged model properly adjusted has proven competition-worthy little addi tional testing necessary Probably two three short DT flights before contest should suffice question philosophy will take moment recall folded wings damaged models lost Free Flight ships have expe rience traceable superfluous test flights think theyll concede point Battery Box/Render Continued page 73 wires strip 1/2 insulation end Placing spring plate equidistant between lines box bot tom mark mounting holes through wood sharp pencil photos shows spring plate position No tice uncut side opposite spring fingers approximately flush edge wood Drill pilot holes using 1A6 drill slight angle screw does split wood see drawing Mount spring plate screws trapping bared lamp cord under plate Its good idea 176 Model Aviation