NO OCR TEXT NO OCR TEXT author checks Parakeet over carefully before another action-packed flight Always watchful model wing warps changes control reactions inputs Wing setup perform smooth axial rolling maneuvers rudder input yaw requires strong yaw-roll coupling YRC directly influenced amount effective dihedral present course could obtain sufficient YRC straight wings generous dihedral angle other possibilities example sweeping wing back will produce effect dihedral increase YRC value given dihedral angle Since full-scale biplanes use some sweep upper wing chose sweep Parakeets top wing moderate amount enhancing YRC exaggerating dihedral years Free Flight modelers have occasion good results used top-mounted forward fin pylon wing struts added help fortify wing against occasional nose-overs Balland-socket joints allow excellent knockapart protection really rough landing enhance YRC various models pylon-type mount top wing seemed natural choice Parakeet since rugged simple adds YRC value As result actual dihedral angle Para keets wings rather modest still little Left The instruments Tatone pilot Williams Bros pane sranea piywooa takes few minutes adds much realism Right 08 Max 25 engine perfect mate model Use wooden engine mounts dampen vibration Left Dave used control hardware Goldberg tail wheel sig Excellent accessories abound check local dealer find what suits best Right Plenty room servos Simple rugged wire landing gear provides plenty shock absorption 34 Model Aviation E ROBELEN jYDA BALSA 4 yLITE PLY 9 5ALSASHEEJ BALSA BLOCK 15-25 TWO STROKE K -PLY 4gPLY 7 \ A DOUbLER AL5AXDWHEEL 77 7 BALL LINKS7 [ITEPLYC 46x A SPAR TYPICAL DOWEL BALSA RIBS 4DWHEELS JYPICAL MUSIc WIRE C bird has tremendous roll response just rudder control no interplane struts early models after seasons flying began notice some chronic problems biggest nuisance keeping top wing tightly clamped place during roll maneuvers wanted tilt roll too occasional top wing spar would crack violent nose-over landing order minimize drag hadnt used struts first place drag penalty turned out small comparatively added struts Refer plan novel hassle-free method mounting Having settled wing system decided use fuselage tail design patterned generally after home-built single-seat EAA-type biplanes addition followed design concept earlier Pronto model whenever suitable stuck stock 3-in-wide woodless expen sive readily available selected tail-dragger landing gear setup since nose wheel biplane would look just plain ridiculous Equally important tail-dragger model can op erate out small bumpy fields problems nose wheel drags grass gets knocked out alignment adds needless weight Thats right Im prejudiced rate Vs-in wire landing gear has proven have excellent tracking takeoff no ground loops reasonably low weight superior re sistance damage wheel position shown plans good average both smooth grass paved runways fly off really bumpy strips thick grass just bend wheels forward about inch get the Parakeet need consider own flying pref erences before choosing engine example strong 15 Enya 15 IV completely adequate normal flying moderate maneuvering pilot wants really strong aerobatics capability 25-size engine good choice recommend FSR-type engines Parakeet engines get best results Master Airscrew 9-4 Whatever flying style pref erence start modest control move ments rudder right elevator own Use balance location shown plans good starting point Most hotdog pilots will want use control movement youll probably move balance point rearward enhance snap roll ma neuvers changes should made tried out time using ample altitude about two mistakes high during check flights Construction notes approach building Parakeet round up necessary materials make kit prepared parts before beginning assem builders have excellent results using thick cyanoacrylate CyA glues exclusively have concerns about strength would recommend Sig Epoxy something similar engine mounts wing center joints Sig Contact Cement good choice fuselage doublers prefer use thick CyA following construction sequence has established facilitate rapid assem bly Parakeet kit Starting fuselage laminate /I6 doublers sides making sure end up left right assembly Lightly score inside sides just aft doublers will help bend later Place right fuselage side over plan side view mark location cross braces engine mounts formers F-i through F-6 Carefully transfer marks inside left fuselage side right fuselage side flat work surface cement F-i F-2 F-3 place checking square alignment before continuing Add left side again carefully check alignment before pro ceeding Cement engine mounts place suitable glue doubt use epoxy Bend fuselage sides together 5 RISNTMAPLK ThRUSTMOTOR MOJTS II II III III ir III/ J us fi II DOWEL 3/I6II4 II Ii II iiII Ii II II I/I6 BALSA COCKPIT FLOOR 3/I6 DOWEL I/B BALSA SHEET SIDES 3/16 BALSA STRINGERS DSRSAL-. 7 TOP VIEW 44 WING ASSEMBI ASSAMALE WNG IWNELS 2 SAND DIHEDRAL ANGLE 3 ALOE ANNELS TOSETHE 4 REMOVE SECTION OF IA DRACES JAOUNT EBARLE BETh 4I/2 SHEET METAL SEDEWS -1/16 PILOT HOCKS OW LITE PLY /wING PLAT FORM SANG TO ThIS LINE SAND EDGE AS SEH3WN I/B BALSA BRACE~ GB BALSA____ BRACE 3/16 BALSA TIP SANS TO THIS LINE DR F-A RIB TEMPtATE LC WING 3/32 BALSA MAKE 12 I/4 BALSA 2 3/I6 DOWEL ENTA I93/BBA ENGINESHEET AWLITE PLY3/B 55 BALSA PAIRING -4PRDR F-K PUSI-IROOS3 SOWNTHRLISTIS SAG SO STR NGERS BALSA BALSS DES tail lightly glue Check alignment placing assembly over top view satisfied order add tapered tail block F-7 horizontal former /s6 square cross braces Install triangular braces behind F-3 thoroughly cement scored areas restore strength Glue tail cone formers add top stringers shown plan Glue F-3A bulk head place add 46 balsa cockpit floor Glue landing gear doubler place also VIE plywood nose bot tom Add extra glue fillets around landing gear doubler engine mounts needed Shape outside top block confirm t balsa pylon will fit correctly Hollow out inside top block fuel tank clearance leaving wall thickness Vs minimum satisfied shaping glue top block place add h-in square nose fairing pieces going finish cockpit plastic film now before adding side pieces fact inside surface E P1 Fl 36 Model Aviation 3AKI BALSA TOP B Quick assemble/disassembie Parakeet makes transportation service snap biplane types Time-honored rubberbands provide protection minor crashes Full-Size Plans See Page 180 MA DIA DOWELVBLITh PLYDIHEDRAL BRACE T BALSA AL BRACESLEADING EDGE WINGTEMPWI DIHEDRALI__ BALSA S/A/YYYIIICENTER SECT AIRFOIL1J WEBSI ---I/B BALSA VB UTE__ BRACEBIBS DIHEDRAL/4 BALSA -BRACE GPLANUPPER CEESOR B jK3/52BALSAI / SOLID BALSARID r /I CENTER SECTIONI r J K 3/IAEI IPLY DIHEDRAL AILDIHEDRAL BRACE5/IA I-V4 BALSA SMALL HORN EDGE LEADING EDGXLOWER WINGTYPICALI DOWEL BOTTOM WINS HINGE /_ _ __ ____ ____ ____ ____ ____ BALSA SPARS3/IA BALSAjIVBLITE1II WEBS lOIFREvPLY TOP B BOTTOMIIIII 1RIS/IABALSA ___ __ j/ ____ _______________ SlEET IjJ BS/4 MAPLE APE 2 3AA BALSA SHEET POSHMAPLE MOTOR 3/IA BALSA PEMOUNTO SHEET HO LOW lOP IN MOUNTLITE 3/IA BALSABLOCK AS SlI PLYWINDSHIELD BALSA -SHAPE AS SHOWN VIEW ERBALL LINKS___ \\- S/IA BALSA DOUBLER MA BALSA PL B BALSA //II/IA OJ-BRO [v33][b-1-10-1-10]]I FIN[ A ____________________ ____ SAl HORN BA SA BOTTOM~I -4 _____ _______PUSHRODS____WING STRUTS TABBATI KRAPT I3/IASO BALSA RECEIVERAzA4 i J555J___________________- SERVO___________________ ______SERVOS_________________ MINI SNAP-LINK/-GOLDBERG NYLON -- -------J-- I"TAILWHEEL BRACKET .CBiB ____If S/IA SO BALSA CROSS PIECS j PLACE APTER TAIL IP6 VIA BALSABALSAVIA-3/4DIAI/IAMA SO BALSA PLYVIA WIRE BOTTOMTAILBLOOPLY S PIECES SHEET SIDES I/B BALSA 4 3/B SHEET METALF-71W MWNT SCREWSII/IAPILOT HOLEII/BLITES/IABALSA PLY GESA CLIPS 3 REOD LG DOUBLERL/B MUSIC FRONT VIEW BALANCE PONT DOJA ER 0 EE S LG CLAMP DETAIL SPECIFICATIONS WING SPAN42 LENGTH34 WEIGHT 2-1/2 LBS CHBRNELS3 ENGINEIS TOSS 02345A MODEL AVIATION PARAKEET DESIGNED B DRAWN BY DAVE ROBELEN TRACING BY rOE DEMARCO blOhdYft rBrRwn - -~WING - - side pieces should also covered before assembly Glue side pieces place stripping away covering glue joint Glue 46 balsa tail cone bottom plywood tail wheel mount place After checking glue joints once shape sand entire fuselage contours shown plan Shape sand headrest also attach yet Assemble balsa pylon pieces sand contours shown Leave top bottom surfaces square well portion glued top block Shape sand -in plywood wing mount leave loose also Round up various 3/IA balsa tail pieces make sure fit properly fuselage other Join ele vators Y16 dowel shown Shape tail surfaces sand smooth Edges should rounded except hinge lines Refer plan contour sand sharp bevel front rudder elevators back edge fin stabilizer should left pylon-mounted top wing major departure usual array cabane struts wires etc builds easily makes easy assembly problemfree wing alignment February 1987 37 LANDING GEAR PATTERN square Set fuselage tail components aside prepare construct wings idea complete construction work before applying covering ma terial way covering process can completed interruption wing construction select flat smooth work surface free bends twists use old hollow door works great sheet Celotex ceiling material placed top work board will provide ideal surface stick pins Fasten plan sheet place smoothing out wrinkles cover wing areas clear plastic sheet such backing Super MonoKote Begin pinning bottom spars trailing edges plan Cement various ribs place taking care stick two center ribs together hstall spar webbing top spars Cement leading edge dowels place clamp securely good glue joints glue really dry remove two panels plan smooth ends sanding block Trim tip plates fit adding i-in balsa braces shown Carefully use sanding block trim center ribs dihedral angle shown glue two panels together Once glue dry remove section center ribs shown install plywood spar brace Glue carefully please Trim sand entire wing until smooth top wing follows same pattern construction except center panel sweep angle Take care trimming fitting various spars leading edge dowels sweep angle proper fit necessary ensure strong joints Shape dihedral angle ends two wing panels leaving center block square sides Borrow household vacuum cleaner thoroughly remove dust Cover various components material choice recommend Super Mono Kote Recheck wings very carefully warps correct problems stage should check again after 48 hours since amount shrinkage can dependent aging humidity other factors Assembly First glue tail components together mount fuselage Strap bottom wing place order check alignment Make sure stabil izer level viewed both front rear parallel bottom lower wing sure fin centerline standing exactly vertical Cut away covering parts joined install pylon its top plate Glue carefully good joint Strap top wing place gluing plywood plate again check align ment thoroughly Check incidence too bottom surface both wings should parallel Once satisfied wing alignment mount struts Fasten ball pieces struts locations shown mark location nylon socket pieces Drill pierce holes spars sockets snap sockets onto bails slip strut assembly back between wings Force nylon sockets holes bring wings tight against struts Twist nylon sockets holes remove play strut glue sockets securely place Hot Stuff other CyA glue Now can unsnap struts sideways put safe place Carefully fit control surfaces place hinges goal have minimum gap hinge line yet retain very free movement use flexible plastic strip hinges fasten Hot Stuff other excellent choices Make up tail wheel assembly fasten place appropriate glue screws etc Once again check carefully smooth free movement before proceeding Mount two control horns shown construct pushrods /16 square balsa wire ends use mini snap links rods tail soft /16 wire inside cabin Slip rods place check smooth easy movement hand Install windshield pilot Mine 2-in-scale Williams Brothers Make up fuel tank mount shown Install tank sliding rear until metal tubes extend through firewalls wrap some strapping tape around tank leave tab back will mighty handy future maintenance Mount engine checking get proper side thrust am partial sheet metal screws holding engine like nuts bolts guest Trim nose clear muffler maybe needle valve install throttle drive linkage Remove engine coat nose fuel proofer thin epoxy glue works great paint engine compartment match model Mount landing gear nylon clamps h-in x #4 sheet metal screws install wheels choice Balance test fly Remount engine place RC equipment loosely fuselage shown plan Strap wings support model fingertips under fuselage location shown necessary move battery and/or servos achieve balance Final-mount RC equipment wrap ping battery receiver softly sponge get excellent results servomounting tape however should con sult literature set use method manufacturer recommends Finish pushrods throttle linkage set control movements elevator Ii up down rudder right Range check radio engine running speeds make sure engine will maintain good power full throttle point nose up 450 Fill tank taxi around bit field surface permits first takeoff point Parakeet directly wind advance throttle evenly punch open quickly Once tail up ground speed looks normal small tug up will lift off easily Once acquainted new little beauty feel free try different control throws CG positions until bird feels just right After have some practice crosswind takeoffs landings fine Just get ground speed up before attempting lift off 38 Model Aviation long-legged Parakeet equally home pavement grass Tracking great theres ample prop clearance models compact size makes great schoolyards
Edition: Model Aviation - 1987/02
Page Numbers: 32, 33, 34, 35, 36, 37, 38
NO OCR TEXT NO OCR TEXT author checks Parakeet over carefully before another action-packed flight Always watchful model wing warps changes control reactions inputs Wing setup perform smooth axial rolling maneuvers rudder input yaw requires strong yaw-roll coupling YRC directly influenced amount effective dihedral present course could obtain sufficient YRC straight wings generous dihedral angle other possibilities example sweeping wing back will produce effect dihedral increase YRC value given dihedral angle Since full-scale biplanes use some sweep upper wing chose sweep Parakeets top wing moderate amount enhancing YRC exaggerating dihedral years Free Flight modelers have occasion good results used top-mounted forward fin pylon wing struts added help fortify wing against occasional nose-overs Balland-socket joints allow excellent knockapart protection really rough landing enhance YRC various models pylon-type mount top wing seemed natural choice Parakeet since rugged simple adds YRC value As result actual dihedral angle Para keets wings rather modest still little Left The instruments Tatone pilot Williams Bros pane sranea piywooa takes few minutes adds much realism Right 08 Max 25 engine perfect mate model Use wooden engine mounts dampen vibration Left Dave used control hardware Goldberg tail wheel sig Excellent accessories abound check local dealer find what suits best Right Plenty room servos Simple rugged wire landing gear provides plenty shock absorption 34 Model Aviation E ROBELEN jYDA BALSA 4 yLITE PLY 9 5ALSASHEEJ BALSA BLOCK 15-25 TWO STROKE K -PLY 4gPLY 7 \ A DOUbLER AL5AXDWHEEL 77 7 BALL LINKS7 [ITEPLYC 46x A SPAR TYPICAL DOWEL BALSA RIBS 4DWHEELS JYPICAL MUSIc WIRE C bird has tremendous roll response just rudder control no interplane struts early models after seasons flying began notice some chronic problems biggest nuisance keeping top wing tightly clamped place during roll maneuvers wanted tilt roll too occasional top wing spar would crack violent nose-over landing order minimize drag hadnt used struts first place drag penalty turned out small comparatively added struts Refer plan novel hassle-free method mounting Having settled wing system decided use fuselage tail design patterned generally after home-built single-seat EAA-type biplanes addition followed design concept earlier Pronto model whenever suitable stuck stock 3-in-wide woodless expen sive readily available selected tail-dragger landing gear setup since nose wheel biplane would look just plain ridiculous Equally important tail-dragger model can op erate out small bumpy fields problems nose wheel drags grass gets knocked out alignment adds needless weight Thats right Im prejudiced rate Vs-in wire landing gear has proven have excellent tracking takeoff no ground loops reasonably low weight superior re sistance damage wheel position shown plans good average both smooth grass paved runways fly off really bumpy strips thick grass just bend wheels forward about inch get the Parakeet need consider own flying pref erences before choosing engine example strong 15 Enya 15 IV completely adequate normal flying moderate maneuvering pilot wants really strong aerobatics capability 25-size engine good choice recommend FSR-type engines Parakeet engines get best results Master Airscrew 9-4 Whatever flying style pref erence start modest control move ments rudder right elevator own Use balance location shown plans good starting point Most hotdog pilots will want use control movement youll probably move balance point rearward enhance snap roll ma neuvers changes should made tried out time using ample altitude about two mistakes high during check flights Construction notes approach building Parakeet round up necessary materials make kit prepared parts before beginning assem builders have excellent results using thick cyanoacrylate CyA glues exclusively have concerns about strength would recommend Sig Epoxy something similar engine mounts wing center joints Sig Contact Cement good choice fuselage doublers prefer use thick CyA following construction sequence has established facilitate rapid assem bly Parakeet kit Starting fuselage laminate /I6 doublers sides making sure end up left right assembly Lightly score inside sides just aft doublers will help bend later Place right fuselage side over plan side view mark location cross braces engine mounts formers F-i through F-6 Carefully transfer marks inside left fuselage side right fuselage side flat work surface cement F-i F-2 F-3 place checking square alignment before continuing Add left side again carefully check alignment before pro ceeding Cement engine mounts place suitable glue doubt use epoxy Bend fuselage sides together 5 RISNTMAPLK ThRUSTMOTOR MOJTS II II III III ir III/ J us fi II DOWEL 3/I6II4 II Ii II iiII Ii II II I/I6 BALSA COCKPIT FLOOR 3/I6 DOWEL I/B BALSA SHEET SIDES 3/16 BALSA STRINGERS DSRSAL-. 7 TOP VIEW 44 WING ASSEMBI ASSAMALE WNG IWNELS 2 SAND DIHEDRAL ANGLE 3 ALOE ANNELS TOSETHE 4 REMOVE SECTION OF IA DRACES JAOUNT EBARLE BETh 4I/2 SHEET METAL SEDEWS -1/16 PILOT HOCKS OW LITE PLY /wING PLAT FORM SANG TO ThIS LINE SAND EDGE AS SEH3WN I/B BALSA BRACE~ GB BALSA____ BRACE 3/16 BALSA TIP SANS TO THIS LINE DR F-A RIB TEMPtATE LC WING 3/32 BALSA MAKE 12 I/4 BALSA 2 3/I6 DOWEL ENTA I93/BBA ENGINESHEET AWLITE PLY3/B 55 BALSA PAIRING -4PRDR F-K PUSI-IROOS3 SOWNTHRLISTIS SAG SO STR NGERS BALSA BALSS DES tail lightly glue Check alignment placing assembly over top view satisfied order add tapered tail block F-7 horizontal former /s6 square cross braces Install triangular braces behind F-3 thoroughly cement scored areas restore strength Glue tail cone formers add top stringers shown plan Glue F-3A bulk head place add 46 balsa cockpit floor Glue landing gear doubler place also VIE plywood nose bot tom Add extra glue fillets around landing gear doubler engine mounts needed Shape outside top block confirm t balsa pylon will fit correctly Hollow out inside top block fuel tank clearance leaving wall thickness Vs minimum satisfied shaping glue top block place add h-in square nose fairing pieces going finish cockpit plastic film now before adding side pieces fact inside surface E P1 Fl 36 Model Aviation 3AKI BALSA TOP B Quick assemble/disassembie Parakeet makes transportation service snap biplane types Time-honored rubberbands provide protection minor crashes Full-Size Plans See Page 180 MA DIA DOWELVBLITh PLYDIHEDRAL BRACE T BALSA AL BRACESLEADING EDGE WINGTEMPWI DIHEDRALI__ BALSA S/A/YYYIIICENTER SECT AIRFOIL1J WEBSI ---I/B BALSA VB UTE__ BRACEBIBS DIHEDRAL/4 BALSA -BRACE GPLANUPPER CEESOR B jK3/52BALSAI / SOLID BALSARID r /I CENTER SECTIONI r J K 3/IAEI IPLY DIHEDRAL AILDIHEDRAL BRACE5/IA I-V4 BALSA SMALL HORN EDGE LEADING EDGXLOWER WINGTYPICALI DOWEL BOTTOM WINS HINGE /_ _ __ ____ ____ ____ ____ ____ BALSA SPARS3/IA BALSAjIVBLITE1II WEBS lOIFREvPLY TOP B BOTTOMIIIII 1RIS/IABALSA ___ __ j/ ____ _______________ SlEET IjJ BS/4 MAPLE APE 2 3AA BALSA SHEET POSHMAPLE MOTOR 3/IA BALSA PEMOUNTO SHEET HO LOW lOP IN MOUNTLITE 3/IA BALSABLOCK AS SlI PLYWINDSHIELD BALSA -SHAPE AS SHOWN VIEW ERBALL LINKS___ \\- S/IA BALSA DOUBLER MA BALSA PL B BALSA //II/IA OJ-BRO [v33][b-1-10-1-10]]I FIN[ A ____________________ ____ SAl HORN BA SA BOTTOM~I -4 _____ _______PUSHRODS____WING STRUTS TABBATI KRAPT I3/IASO BALSA RECEIVERAzA4 i J555J___________________- SERVO___________________ ______SERVOS_________________ MINI SNAP-LINK/-GOLDBERG NYLON -- -------J-- I"TAILWHEEL BRACKET .CBiB ____If S/IA SO BALSA CROSS PIECS j PLACE APTER TAIL IP6 VIA BALSABALSAVIA-3/4DIAI/IAMA SO BALSA PLYVIA WIRE BOTTOMTAILBLOOPLY S PIECES SHEET SIDES I/B BALSA 4 3/B SHEET METALF-71W MWNT SCREWSII/IAPILOT HOLEII/BLITES/IABALSA PLY GESA CLIPS 3 REOD LG DOUBLERL/B MUSIC FRONT VIEW BALANCE PONT DOJA ER 0 EE S LG CLAMP DETAIL SPECIFICATIONS WING SPAN42 LENGTH34 WEIGHT 2-1/2 LBS CHBRNELS3 ENGINEIS TOSS 02345A MODEL AVIATION PARAKEET DESIGNED B DRAWN BY DAVE ROBELEN TRACING BY rOE DEMARCO blOhdYft rBrRwn - -~WING - - side pieces should also covered before assembly Glue side pieces place stripping away covering glue joint Glue 46 balsa tail cone bottom plywood tail wheel mount place After checking glue joints once shape sand entire fuselage contours shown plan Shape sand headrest also attach yet Assemble balsa pylon pieces sand contours shown Leave top bottom surfaces square well portion glued top block Shape sand -in plywood wing mount leave loose also Round up various 3/IA balsa tail pieces make sure fit properly fuselage other Join ele vators Y16 dowel shown Shape tail surfaces sand smooth Edges should rounded except hinge lines Refer plan contour sand sharp bevel front rudder elevators back edge fin stabilizer should left pylon-mounted top wing major departure usual array cabane struts wires etc builds easily makes easy assembly problemfree wing alignment February 1987 37 LANDING GEAR PATTERN square Set fuselage tail components aside prepare construct wings idea complete construction work before applying covering ma terial way covering process can completed interruption wing construction select flat smooth work surface free bends twists use old hollow door works great sheet Celotex ceiling material placed top work board will provide ideal surface stick pins Fasten plan sheet place smoothing out wrinkles cover wing areas clear plastic sheet such backing Super MonoKote Begin pinning bottom spars trailing edges plan Cement various ribs place taking care stick two center ribs together hstall spar webbing top spars Cement leading edge dowels place clamp securely good glue joints glue really dry remove two panels plan smooth ends sanding block Trim tip plates fit adding i-in balsa braces shown Carefully use sanding block trim center ribs dihedral angle shown glue two panels together Once glue dry remove section center ribs shown install plywood spar brace Glue carefully please Trim sand entire wing until smooth top wing follows same pattern construction except center panel sweep angle Take care trimming fitting various spars leading edge dowels sweep angle proper fit necessary ensure strong joints Shape dihedral angle ends two wing panels leaving center block square sides Borrow household vacuum cleaner thoroughly remove dust Cover various components material choice recommend Super Mono Kote Recheck wings very carefully warps correct problems stage should check again after 48 hours since amount shrinkage can dependent aging humidity other factors Assembly First glue tail components together mount fuselage Strap bottom wing place order check alignment Make sure stabil izer level viewed both front rear parallel bottom lower wing sure fin centerline standing exactly vertical Cut away covering parts joined install pylon its top plate Glue carefully good joint Strap top wing place gluing plywood plate again check align ment thoroughly Check incidence too bottom surface both wings should parallel Once satisfied wing alignment mount struts Fasten ball pieces struts locations shown mark location nylon socket pieces Drill pierce holes spars sockets snap sockets onto bails slip strut assembly back between wings Force nylon sockets holes bring wings tight against struts Twist nylon sockets holes remove play strut glue sockets securely place Hot Stuff other CyA glue Now can unsnap struts sideways put safe place Carefully fit control surfaces place hinges goal have minimum gap hinge line yet retain very free movement use flexible plastic strip hinges fasten Hot Stuff other excellent choices Make up tail wheel assembly fasten place appropriate glue screws etc Once again check carefully smooth free movement before proceeding Mount two control horns shown construct pushrods /16 square balsa wire ends use mini snap links rods tail soft /16 wire inside cabin Slip rods place check smooth easy movement hand Install windshield pilot Mine 2-in-scale Williams Brothers Make up fuel tank mount shown Install tank sliding rear until metal tubes extend through firewalls wrap some strapping tape around tank leave tab back will mighty handy future maintenance Mount engine checking get proper side thrust am partial sheet metal screws holding engine like nuts bolts guest Trim nose clear muffler maybe needle valve install throttle drive linkage Remove engine coat nose fuel proofer thin epoxy glue works great paint engine compartment match model Mount landing gear nylon clamps h-in x #4 sheet metal screws install wheels choice Balance test fly Remount engine place RC equipment loosely fuselage shown plan Strap wings support model fingertips under fuselage location shown necessary move battery and/or servos achieve balance Final-mount RC equipment wrap ping battery receiver softly sponge get excellent results servomounting tape however should con sult literature set use method manufacturer recommends Finish pushrods throttle linkage set control movements elevator Ii up down rudder right Range check radio engine running speeds make sure engine will maintain good power full throttle point nose up 450 Fill tank taxi around bit field surface permits first takeoff point Parakeet directly wind advance throttle evenly punch open quickly Once tail up ground speed looks normal small tug up will lift off easily Once acquainted new little beauty feel free try different control throws CG positions until bird feels just right After have some practice crosswind takeoffs landings fine Just get ground speed up before attempting lift off 38 Model Aviation long-legged Parakeet equally home pavement grass Tracking great theres ample prop clearance models compact size makes great schoolyards
Edition: Model Aviation - 1987/02
Page Numbers: 32, 33, 34, 35, 36, 37, 38
NO OCR TEXT NO OCR TEXT author checks Parakeet over carefully before another action-packed flight Always watchful model wing warps changes control reactions inputs Wing setup perform smooth axial rolling maneuvers rudder input yaw requires strong yaw-roll coupling YRC directly influenced amount effective dihedral present course could obtain sufficient YRC straight wings generous dihedral angle other possibilities example sweeping wing back will produce effect dihedral increase YRC value given dihedral angle Since full-scale biplanes use some sweep upper wing chose sweep Parakeets top wing moderate amount enhancing YRC exaggerating dihedral years Free Flight modelers have occasion good results used top-mounted forward fin pylon wing struts added help fortify wing against occasional nose-overs Balland-socket joints allow excellent knockapart protection really rough landing enhance YRC various models pylon-type mount top wing seemed natural choice Parakeet since rugged simple adds YRC value As result actual dihedral angle Para keets wings rather modest still little Left The instruments Tatone pilot Williams Bros pane sranea piywooa takes few minutes adds much realism Right 08 Max 25 engine perfect mate model Use wooden engine mounts dampen vibration Left Dave used control hardware Goldberg tail wheel sig Excellent accessories abound check local dealer find what suits best Right Plenty room servos Simple rugged wire landing gear provides plenty shock absorption 34 Model Aviation E ROBELEN jYDA BALSA 4 yLITE PLY 9 5ALSASHEEJ BALSA BLOCK 15-25 TWO STROKE K -PLY 4gPLY 7 \ A DOUbLER AL5AXDWHEEL 77 7 BALL LINKS7 [ITEPLYC 46x A SPAR TYPICAL DOWEL BALSA RIBS 4DWHEELS JYPICAL MUSIc WIRE C bird has tremendous roll response just rudder control no interplane struts early models after seasons flying began notice some chronic problems biggest nuisance keeping top wing tightly clamped place during roll maneuvers wanted tilt roll too occasional top wing spar would crack violent nose-over landing order minimize drag hadnt used struts first place drag penalty turned out small comparatively added struts Refer plan novel hassle-free method mounting Having settled wing system decided use fuselage tail design patterned generally after home-built single-seat EAA-type biplanes addition followed design concept earlier Pronto model whenever suitable stuck stock 3-in-wide woodless expen sive readily available selected tail-dragger landing gear setup since nose wheel biplane would look just plain ridiculous Equally important tail-dragger model can op erate out small bumpy fields problems nose wheel drags grass gets knocked out alignment adds needless weight Thats right Im prejudiced rate Vs-in wire landing gear has proven have excellent tracking takeoff no ground loops reasonably low weight superior re sistance damage wheel position shown plans good average both smooth grass paved runways fly off really bumpy strips thick grass just bend wheels forward about inch get the Parakeet need consider own flying pref erences before choosing engine example strong 15 Enya 15 IV completely adequate normal flying moderate maneuvering pilot wants really strong aerobatics capability 25-size engine good choice recommend FSR-type engines Parakeet engines get best results Master Airscrew 9-4 Whatever flying style pref erence start modest control move ments rudder right elevator own Use balance location shown plans good starting point Most hotdog pilots will want use control movement youll probably move balance point rearward enhance snap roll ma neuvers changes should made tried out time using ample altitude about two mistakes high during check flights Construction notes approach building Parakeet round up necessary materials make kit prepared parts before beginning assem builders have excellent results using thick cyanoacrylate CyA glues exclusively have concerns about strength would recommend Sig Epoxy something similar engine mounts wing center joints Sig Contact Cement good choice fuselage doublers prefer use thick CyA following construction sequence has established facilitate rapid assem bly Parakeet kit Starting fuselage laminate /I6 doublers sides making sure end up left right assembly Lightly score inside sides just aft doublers will help bend later Place right fuselage side over plan side view mark location cross braces engine mounts formers F-i through F-6 Carefully transfer marks inside left fuselage side right fuselage side flat work surface cement F-i F-2 F-3 place checking square alignment before continuing Add left side again carefully check alignment before pro ceeding Cement engine mounts place suitable glue doubt use epoxy Bend fuselage sides together 5 RISNTMAPLK ThRUSTMOTOR MOJTS II II III III ir III/ J us fi II DOWEL 3/I6II4 II Ii II iiII Ii II II I/I6 BALSA COCKPIT FLOOR 3/I6 DOWEL I/B BALSA SHEET SIDES 3/16 BALSA STRINGERS DSRSAL-. 7 TOP VIEW 44 WING ASSEMBI ASSAMALE WNG IWNELS 2 SAND DIHEDRAL ANGLE 3 ALOE ANNELS TOSETHE 4 REMOVE SECTION OF IA DRACES JAOUNT EBARLE BETh 4I/2 SHEET METAL SEDEWS -1/16 PILOT HOCKS OW LITE PLY /wING PLAT FORM SANG TO ThIS LINE SAND EDGE AS SEH3WN I/B BALSA BRACE~ GB BALSA____ BRACE 3/16 BALSA TIP SANS TO THIS LINE DR F-A RIB TEMPtATE LC WING 3/32 BALSA MAKE 12 I/4 BALSA 2 3/I6 DOWEL ENTA I93/BBA ENGINESHEET AWLITE PLY3/B 55 BALSA PAIRING -4PRDR F-K PUSI-IROOS3 SOWNTHRLISTIS SAG SO STR NGERS BALSA BALSS DES tail lightly glue Check alignment placing assembly over top view satisfied order add tapered tail block F-7 horizontal former /s6 square cross braces Install triangular braces behind F-3 thoroughly cement scored areas restore strength Glue tail cone formers add top stringers shown plan Glue F-3A bulk head place add 46 balsa cockpit floor Glue landing gear doubler place also VIE plywood nose bot tom Add extra glue fillets around landing gear doubler engine mounts needed Shape outside top block confirm t balsa pylon will fit correctly Hollow out inside top block fuel tank clearance leaving wall thickness Vs minimum satisfied shaping glue top block place add h-in square nose fairing pieces going finish cockpit plastic film now before adding side pieces fact inside surface E P1 Fl 36 Model Aviation 3AKI BALSA TOP B Quick assemble/disassembie Parakeet makes transportation service snap biplane types Time-honored rubberbands provide protection minor crashes Full-Size Plans See Page 180 MA DIA DOWELVBLITh PLYDIHEDRAL BRACE T BALSA AL BRACESLEADING EDGE WINGTEMPWI DIHEDRALI__ BALSA S/A/YYYIIICENTER SECT AIRFOIL1J WEBSI ---I/B BALSA VB UTE__ BRACEBIBS DIHEDRAL/4 BALSA -BRACE GPLANUPPER CEESOR B jK3/52BALSAI / SOLID BALSARID r /I CENTER SECTIONI r J K 3/IAEI IPLY DIHEDRAL AILDIHEDRAL BRACE5/IA I-V4 BALSA SMALL HORN EDGE LEADING EDGXLOWER WINGTYPICALI DOWEL BOTTOM WINS HINGE /_ _ __ ____ ____ ____ ____ ____ BALSA SPARS3/IA BALSAjIVBLITE1II WEBS lOIFREvPLY TOP B BOTTOMIIIII 1RIS/IABALSA ___ __ j/ ____ _______________ SlEET IjJ BS/4 MAPLE APE 2 3AA BALSA SHEET POSHMAPLE MOTOR 3/IA BALSA PEMOUNTO SHEET HO LOW lOP IN MOUNTLITE 3/IA BALSABLOCK AS SlI PLYWINDSHIELD BALSA -SHAPE AS SHOWN VIEW ERBALL LINKS___ \\- S/IA BALSA DOUBLER MA BALSA PL B BALSA //II/IA OJ-BRO [v33][b-1-10-1-10]]I FIN[ A ____________________ ____ SAl HORN BA SA BOTTOM~I -4 _____ _______PUSHRODS____WING STRUTS TABBATI KRAPT I3/IASO BALSA RECEIVERAzA4 i J555J___________________- SERVO___________________ ______SERVOS_________________ MINI SNAP-LINK/-GOLDBERG NYLON -- -------J-- I"TAILWHEEL BRACKET .CBiB ____If S/IA SO BALSA CROSS PIECS j PLACE APTER TAIL IP6 VIA BALSABALSAVIA-3/4DIAI/IAMA SO BALSA PLYVIA WIRE BOTTOMTAILBLOOPLY S PIECES SHEET SIDES I/B BALSA 4 3/B SHEET METALF-71W MWNT SCREWSII/IAPILOT HOLEII/BLITES/IABALSA PLY GESA CLIPS 3 REOD LG DOUBLERL/B MUSIC FRONT VIEW BALANCE PONT DOJA ER 0 EE S LG CLAMP DETAIL SPECIFICATIONS WING SPAN42 LENGTH34 WEIGHT 2-1/2 LBS CHBRNELS3 ENGINEIS TOSS 02345A MODEL AVIATION PARAKEET DESIGNED B DRAWN BY DAVE ROBELEN TRACING BY rOE DEMARCO blOhdYft rBrRwn - -~WING - - side pieces should also covered before assembly Glue side pieces place stripping away covering glue joint Glue 46 balsa tail cone bottom plywood tail wheel mount place After checking glue joints once shape sand entire fuselage contours shown plan Shape sand headrest also attach yet Assemble balsa pylon pieces sand contours shown Leave top bottom surfaces square well portion glued top block Shape sand -in plywood wing mount leave loose also Round up various 3/IA balsa tail pieces make sure fit properly fuselage other Join ele vators Y16 dowel shown Shape tail surfaces sand smooth Edges should rounded except hinge lines Refer plan contour sand sharp bevel front rudder elevators back edge fin stabilizer should left pylon-mounted top wing major departure usual array cabane struts wires etc builds easily makes easy assembly problemfree wing alignment February 1987 37 LANDING GEAR PATTERN square Set fuselage tail components aside prepare construct wings idea complete construction work before applying covering ma terial way covering process can completed interruption wing construction select flat smooth work surface free bends twists use old hollow door works great sheet Celotex ceiling material placed top work board will provide ideal surface stick pins Fasten plan sheet place smoothing out wrinkles cover wing areas clear plastic sheet such backing Super MonoKote Begin pinning bottom spars trailing edges plan Cement various ribs place taking care stick two center ribs together hstall spar webbing top spars Cement leading edge dowels place clamp securely good glue joints glue really dry remove two panels plan smooth ends sanding block Trim tip plates fit adding i-in balsa braces shown Carefully use sanding block trim center ribs dihedral angle shown glue two panels together Once glue dry remove section center ribs shown install plywood spar brace Glue carefully please Trim sand entire wing until smooth top wing follows same pattern construction except center panel sweep angle Take care trimming fitting various spars leading edge dowels sweep angle proper fit necessary ensure strong joints Shape dihedral angle ends two wing panels leaving center block square sides Borrow household vacuum cleaner thoroughly remove dust Cover various components material choice recommend Super Mono Kote Recheck wings very carefully warps correct problems stage should check again after 48 hours since amount shrinkage can dependent aging humidity other factors Assembly First glue tail components together mount fuselage Strap bottom wing place order check alignment Make sure stabil izer level viewed both front rear parallel bottom lower wing sure fin centerline standing exactly vertical Cut away covering parts joined install pylon its top plate Glue carefully good joint Strap top wing place gluing plywood plate again check align ment thoroughly Check incidence too bottom surface both wings should parallel Once satisfied wing alignment mount struts Fasten ball pieces struts locations shown mark location nylon socket pieces Drill pierce holes spars sockets snap sockets onto bails slip strut assembly back between wings Force nylon sockets holes bring wings tight against struts Twist nylon sockets holes remove play strut glue sockets securely place Hot Stuff other CyA glue Now can unsnap struts sideways put safe place Carefully fit control surfaces place hinges goal have minimum gap hinge line yet retain very free movement use flexible plastic strip hinges fasten Hot Stuff other excellent choices Make up tail wheel assembly fasten place appropriate glue screws etc Once again check carefully smooth free movement before proceeding Mount two control horns shown construct pushrods /16 square balsa wire ends use mini snap links rods tail soft /16 wire inside cabin Slip rods place check smooth easy movement hand Install windshield pilot Mine 2-in-scale Williams Brothers Make up fuel tank mount shown Install tank sliding rear until metal tubes extend through firewalls wrap some strapping tape around tank leave tab back will mighty handy future maintenance Mount engine checking get proper side thrust am partial sheet metal screws holding engine like nuts bolts guest Trim nose clear muffler maybe needle valve install throttle drive linkage Remove engine coat nose fuel proofer thin epoxy glue works great paint engine compartment match model Mount landing gear nylon clamps h-in x #4 sheet metal screws install wheels choice Balance test fly Remount engine place RC equipment loosely fuselage shown plan Strap wings support model fingertips under fuselage location shown necessary move battery and/or servos achieve balance Final-mount RC equipment wrap ping battery receiver softly sponge get excellent results servomounting tape however should con sult literature set use method manufacturer recommends Finish pushrods throttle linkage set control movements elevator Ii up down rudder right Range check radio engine running speeds make sure engine will maintain good power full throttle point nose up 450 Fill tank taxi around bit field surface permits first takeoff point Parakeet directly wind advance throttle evenly punch open quickly Once tail up ground speed looks normal small tug up will lift off easily Once acquainted new little beauty feel free try different control throws CG positions until bird feels just right After have some practice crosswind takeoffs landings fine Just get ground speed up before attempting lift off 38 Model Aviation long-legged Parakeet equally home pavement grass Tracking great theres ample prop clearance models compact size makes great schoolyards
Edition: Model Aviation - 1987/02
Page Numbers: 32, 33, 34, 35, 36, 37, 38
NO OCR TEXT NO OCR TEXT author checks Parakeet over carefully before another action-packed flight Always watchful model wing warps changes control reactions inputs Wing setup perform smooth axial rolling maneuvers rudder input yaw requires strong yaw-roll coupling YRC directly influenced amount effective dihedral present course could obtain sufficient YRC straight wings generous dihedral angle other possibilities example sweeping wing back will produce effect dihedral increase YRC value given dihedral angle Since full-scale biplanes use some sweep upper wing chose sweep Parakeets top wing moderate amount enhancing YRC exaggerating dihedral years Free Flight modelers have occasion good results used top-mounted forward fin pylon wing struts added help fortify wing against occasional nose-overs Balland-socket joints allow excellent knockapart protection really rough landing enhance YRC various models pylon-type mount top wing seemed natural choice Parakeet since rugged simple adds YRC value As result actual dihedral angle Para keets wings rather modest still little Left The instruments Tatone pilot Williams Bros pane sranea piywooa takes few minutes adds much realism Right 08 Max 25 engine perfect mate model Use wooden engine mounts dampen vibration Left Dave used control hardware Goldberg tail wheel sig Excellent accessories abound check local dealer find what suits best Right Plenty room servos Simple rugged wire landing gear provides plenty shock absorption 34 Model Aviation E ROBELEN jYDA BALSA 4 yLITE PLY 9 5ALSASHEEJ BALSA BLOCK 15-25 TWO STROKE K -PLY 4gPLY 7 \ A DOUbLER AL5AXDWHEEL 77 7 BALL LINKS7 [ITEPLYC 46x A SPAR TYPICAL DOWEL BALSA RIBS 4DWHEELS JYPICAL MUSIc WIRE C bird has tremendous roll response just rudder control no interplane struts early models after seasons flying began notice some chronic problems biggest nuisance keeping top wing tightly clamped place during roll maneuvers wanted tilt roll too occasional top wing spar would crack violent nose-over landing order minimize drag hadnt used struts first place drag penalty turned out small comparatively added struts Refer plan novel hassle-free method mounting Having settled wing system decided use fuselage tail design patterned generally after home-built single-seat EAA-type biplanes addition followed design concept earlier Pronto model whenever suitable stuck stock 3-in-wide woodless expen sive readily available selected tail-dragger landing gear setup since nose wheel biplane would look just plain ridiculous Equally important tail-dragger model can op erate out small bumpy fields problems nose wheel drags grass gets knocked out alignment adds needless weight Thats right Im prejudiced rate Vs-in wire landing gear has proven have excellent tracking takeoff no ground loops reasonably low weight superior re sistance damage wheel position shown plans good average both smooth grass paved runways fly off really bumpy strips thick grass just bend wheels forward about inch get the Parakeet need consider own flying pref erences before choosing engine example strong 15 Enya 15 IV completely adequate normal flying moderate maneuvering pilot wants really strong aerobatics capability 25-size engine good choice recommend FSR-type engines Parakeet engines get best results Master Airscrew 9-4 Whatever flying style pref erence start modest control move ments rudder right elevator own Use balance location shown plans good starting point Most hotdog pilots will want use control movement youll probably move balance point rearward enhance snap roll ma neuvers changes should made tried out time using ample altitude about two mistakes high during check flights Construction notes approach building Parakeet round up necessary materials make kit prepared parts before beginning assem builders have excellent results using thick cyanoacrylate CyA glues exclusively have concerns about strength would recommend Sig Epoxy something similar engine mounts wing center joints Sig Contact Cement good choice fuselage doublers prefer use thick CyA following construction sequence has established facilitate rapid assem bly Parakeet kit Starting fuselage laminate /I6 doublers sides making sure end up left right assembly Lightly score inside sides just aft doublers will help bend later Place right fuselage side over plan side view mark location cross braces engine mounts formers F-i through F-6 Carefully transfer marks inside left fuselage side right fuselage side flat work surface cement F-i F-2 F-3 place checking square alignment before continuing Add left side again carefully check alignment before pro ceeding Cement engine mounts place suitable glue doubt use epoxy Bend fuselage sides together 5 RISNTMAPLK ThRUSTMOTOR MOJTS II II III III ir III/ J us fi II DOWEL 3/I6II4 II Ii II iiII Ii II II I/I6 BALSA COCKPIT FLOOR 3/I6 DOWEL I/B BALSA SHEET SIDES 3/16 BALSA STRINGERS DSRSAL-. 7 TOP VIEW 44 WING ASSEMBI ASSAMALE WNG IWNELS 2 SAND DIHEDRAL ANGLE 3 ALOE ANNELS TOSETHE 4 REMOVE SECTION OF IA DRACES JAOUNT EBARLE BETh 4I/2 SHEET METAL SEDEWS -1/16 PILOT HOCKS OW LITE PLY /wING PLAT FORM SANG TO ThIS LINE SAND EDGE AS SEH3WN I/B BALSA BRACE~ GB BALSA____ BRACE 3/16 BALSA TIP SANS TO THIS LINE DR F-A RIB TEMPtATE LC WING 3/32 BALSA MAKE 12 I/4 BALSA 2 3/I6 DOWEL ENTA I93/BBA ENGINESHEET AWLITE PLY3/B 55 BALSA PAIRING -4PRDR F-K PUSI-IROOS3 SOWNTHRLISTIS SAG SO STR NGERS BALSA BALSS DES tail lightly glue Check alignment placing assembly over top view satisfied order add tapered tail block F-7 horizontal former /s6 square cross braces Install triangular braces behind F-3 thoroughly cement scored areas restore strength Glue tail cone formers add top stringers shown plan Glue F-3A bulk head place add 46 balsa cockpit floor Glue landing gear doubler place also VIE plywood nose bot tom Add extra glue fillets around landing gear doubler engine mounts needed Shape outside top block confirm t balsa pylon will fit correctly Hollow out inside top block fuel tank clearance leaving wall thickness Vs minimum satisfied shaping glue top block place add h-in square nose fairing pieces going finish cockpit plastic film now before adding side pieces fact inside surface E P1 Fl 36 Model Aviation 3AKI BALSA TOP B Quick assemble/disassembie Parakeet makes transportation service snap biplane types Time-honored rubberbands provide protection minor crashes Full-Size Plans See Page 180 MA DIA DOWELVBLITh PLYDIHEDRAL BRACE T BALSA AL BRACESLEADING EDGE WINGTEMPWI DIHEDRALI__ BALSA S/A/YYYIIICENTER SECT AIRFOIL1J WEBSI ---I/B BALSA VB UTE__ BRACEBIBS DIHEDRAL/4 BALSA -BRACE GPLANUPPER CEESOR B jK3/52BALSAI / SOLID BALSARID r /I CENTER SECTIONI r J K 3/IAEI IPLY DIHEDRAL AILDIHEDRAL BRACE5/IA I-V4 BALSA SMALL HORN EDGE LEADING EDGXLOWER WINGTYPICALI DOWEL BOTTOM WINS HINGE /_ _ __ ____ ____ ____ ____ ____ BALSA SPARS3/IA BALSAjIVBLITE1II WEBS lOIFREvPLY TOP B BOTTOMIIIII 1RIS/IABALSA ___ __ j/ ____ _______________ SlEET IjJ BS/4 MAPLE APE 2 3AA BALSA SHEET POSHMAPLE MOTOR 3/IA BALSA PEMOUNTO SHEET HO LOW lOP IN MOUNTLITE 3/IA BALSABLOCK AS SlI PLYWINDSHIELD BALSA -SHAPE AS SHOWN VIEW ERBALL LINKS___ \\- S/IA BALSA DOUBLER MA BALSA PL B BALSA //II/IA OJ-BRO [v33][b-1-10-1-10]]I FIN[ A ____________________ ____ SAl HORN BA SA BOTTOM~I -4 _____ _______PUSHRODS____WING STRUTS TABBATI KRAPT I3/IASO BALSA RECEIVERAzA4 i J555J___________________- SERVO___________________ ______SERVOS_________________ MINI SNAP-LINK/-GOLDBERG NYLON -- -------J-- I"TAILWHEEL BRACKET .CBiB ____If S/IA SO BALSA CROSS PIECS j PLACE APTER TAIL IP6 VIA BALSABALSAVIA-3/4DIAI/IAMA SO BALSA PLYVIA WIRE BOTTOMTAILBLOOPLY S PIECES SHEET SIDES I/B BALSA 4 3/B SHEET METALF-71W MWNT SCREWSII/IAPILOT HOLEII/BLITES/IABALSA PLY GESA CLIPS 3 REOD LG DOUBLERL/B MUSIC FRONT VIEW BALANCE PONT DOJA ER 0 EE S LG CLAMP DETAIL SPECIFICATIONS WING SPAN42 LENGTH34 WEIGHT 2-1/2 LBS CHBRNELS3 ENGINEIS TOSS 02345A MODEL AVIATION PARAKEET DESIGNED B DRAWN BY DAVE ROBELEN TRACING BY rOE DEMARCO blOhdYft rBrRwn - -~WING - - side pieces should also covered before assembly Glue side pieces place stripping away covering glue joint Glue 46 balsa tail cone bottom plywood tail wheel mount place After checking glue joints once shape sand entire fuselage contours shown plan Shape sand headrest also attach yet Assemble balsa pylon pieces sand contours shown Leave top bottom surfaces square well portion glued top block Shape sand -in plywood wing mount leave loose also Round up various 3/IA balsa tail pieces make sure fit properly fuselage other Join ele vators Y16 dowel shown Shape tail surfaces sand smooth Edges should rounded except hinge lines Refer plan contour sand sharp bevel front rudder elevators back edge fin stabilizer should left pylon-mounted top wing major departure usual array cabane struts wires etc builds easily makes easy assembly problemfree wing alignment February 1987 37 LANDING GEAR PATTERN square Set fuselage tail components aside prepare construct wings idea complete construction work before applying covering ma terial way covering process can completed interruption wing construction select flat smooth work surface free bends twists use old hollow door works great sheet Celotex ceiling material placed top work board will provide ideal surface stick pins Fasten plan sheet place smoothing out wrinkles cover wing areas clear plastic sheet such backing Super MonoKote Begin pinning bottom spars trailing edges plan Cement various ribs place taking care stick two center ribs together hstall spar webbing top spars Cement leading edge dowels place clamp securely good glue joints glue really dry remove two panels plan smooth ends sanding block Trim tip plates fit adding i-in balsa braces shown Carefully use sanding block trim center ribs dihedral angle shown glue two panels together Once glue dry remove section center ribs shown install plywood spar brace Glue carefully please Trim sand entire wing until smooth top wing follows same pattern construction except center panel sweep angle Take care trimming fitting various spars leading edge dowels sweep angle proper fit necessary ensure strong joints Shape dihedral angle ends two wing panels leaving center block square sides Borrow household vacuum cleaner thoroughly remove dust Cover various components material choice recommend Super Mono Kote Recheck wings very carefully warps correct problems stage should check again after 48 hours since amount shrinkage can dependent aging humidity other factors Assembly First glue tail components together mount fuselage Strap bottom wing place order check alignment Make sure stabil izer level viewed both front rear parallel bottom lower wing sure fin centerline standing exactly vertical Cut away covering parts joined install pylon its top plate Glue carefully good joint Strap top wing place gluing plywood plate again check align ment thoroughly Check incidence too bottom surface both wings should parallel Once satisfied wing alignment mount struts Fasten ball pieces struts locations shown mark location nylon socket pieces Drill pierce holes spars sockets snap sockets onto bails slip strut assembly back between wings Force nylon sockets holes bring wings tight against struts Twist nylon sockets holes remove play strut glue sockets securely place Hot Stuff other CyA glue Now can unsnap struts sideways put safe place Carefully fit control surfaces place hinges goal have minimum gap hinge line yet retain very free movement use flexible plastic strip hinges fasten Hot Stuff other excellent choices Make up tail wheel assembly fasten place appropriate glue screws etc Once again check carefully smooth free movement before proceeding Mount two control horns shown construct pushrods /16 square balsa wire ends use mini snap links rods tail soft /16 wire inside cabin Slip rods place check smooth easy movement hand Install windshield pilot Mine 2-in-scale Williams Brothers Make up fuel tank mount shown Install tank sliding rear until metal tubes extend through firewalls wrap some strapping tape around tank leave tab back will mighty handy future maintenance Mount engine checking get proper side thrust am partial sheet metal screws holding engine like nuts bolts guest Trim nose clear muffler maybe needle valve install throttle drive linkage Remove engine coat nose fuel proofer thin epoxy glue works great paint engine compartment match model Mount landing gear nylon clamps h-in x #4 sheet metal screws install wheels choice Balance test fly Remount engine place RC equipment loosely fuselage shown plan Strap wings support model fingertips under fuselage location shown necessary move battery and/or servos achieve balance Final-mount RC equipment wrap ping battery receiver softly sponge get excellent results servomounting tape however should con sult literature set use method manufacturer recommends Finish pushrods throttle linkage set control movements elevator Ii up down rudder right Range check radio engine running speeds make sure engine will maintain good power full throttle point nose up 450 Fill tank taxi around bit field surface permits first takeoff point Parakeet directly wind advance throttle evenly punch open quickly Once tail up ground speed looks normal small tug up will lift off easily Once acquainted new little beauty feel free try different control throws CG positions until bird feels just right After have some practice crosswind takeoffs landings fine Just get ground speed up before attempting lift off 38 Model Aviation long-legged Parakeet equally home pavement grass Tracking great theres ample prop clearance models compact size makes great schoolyards
Edition: Model Aviation - 1987/02
Page Numbers: 32, 33, 34, 35, 36, 37, 38
NO OCR TEXT NO OCR TEXT author checks Parakeet over carefully before another action-packed flight Always watchful model wing warps changes control reactions inputs Wing setup perform smooth axial rolling maneuvers rudder input yaw requires strong yaw-roll coupling YRC directly influenced amount effective dihedral present course could obtain sufficient YRC straight wings generous dihedral angle other possibilities example sweeping wing back will produce effect dihedral increase YRC value given dihedral angle Since full-scale biplanes use some sweep upper wing chose sweep Parakeets top wing moderate amount enhancing YRC exaggerating dihedral years Free Flight modelers have occasion good results used top-mounted forward fin pylon wing struts added help fortify wing against occasional nose-overs Balland-socket joints allow excellent knockapart protection really rough landing enhance YRC various models pylon-type mount top wing seemed natural choice Parakeet since rugged simple adds YRC value As result actual dihedral angle Para keets wings rather modest still little Left The instruments Tatone pilot Williams Bros pane sranea piywooa takes few minutes adds much realism Right 08 Max 25 engine perfect mate model Use wooden engine mounts dampen vibration Left Dave used control hardware Goldberg tail wheel sig Excellent accessories abound check local dealer find what suits best Right Plenty room servos Simple rugged wire landing gear provides plenty shock absorption 34 Model Aviation E ROBELEN jYDA BALSA 4 yLITE PLY 9 5ALSASHEEJ BALSA BLOCK 15-25 TWO STROKE K -PLY 4gPLY 7 \ A DOUbLER AL5AXDWHEEL 77 7 BALL LINKS7 [ITEPLYC 46x A SPAR TYPICAL DOWEL BALSA RIBS 4DWHEELS JYPICAL MUSIc WIRE C bird has tremendous roll response just rudder control no interplane struts early models after seasons flying began notice some chronic problems biggest nuisance keeping top wing tightly clamped place during roll maneuvers wanted tilt roll too occasional top wing spar would crack violent nose-over landing order minimize drag hadnt used struts first place drag penalty turned out small comparatively added struts Refer plan novel hassle-free method mounting Having settled wing system decided use fuselage tail design patterned generally after home-built single-seat EAA-type biplanes addition followed design concept earlier Pronto model whenever suitable stuck stock 3-in-wide woodless expen sive readily available selected tail-dragger landing gear setup since nose wheel biplane would look just plain ridiculous Equally important tail-dragger model can op erate out small bumpy fields problems nose wheel drags grass gets knocked out alignment adds needless weight Thats right Im prejudiced rate Vs-in wire landing gear has proven have excellent tracking takeoff no ground loops reasonably low weight superior re sistance damage wheel position shown plans good average both smooth grass paved runways fly off really bumpy strips thick grass just bend wheels forward about inch get the Parakeet need consider own flying pref erences before choosing engine example strong 15 Enya 15 IV completely adequate normal flying moderate maneuvering pilot wants really strong aerobatics capability 25-size engine good choice recommend FSR-type engines Parakeet engines get best results Master Airscrew 9-4 Whatever flying style pref erence start modest control move ments rudder right elevator own Use balance location shown plans good starting point Most hotdog pilots will want use control movement youll probably move balance point rearward enhance snap roll ma neuvers changes should made tried out time using ample altitude about two mistakes high during check flights Construction notes approach building Parakeet round up necessary materials make kit prepared parts before beginning assem builders have excellent results using thick cyanoacrylate CyA glues exclusively have concerns about strength would recommend Sig Epoxy something similar engine mounts wing center joints Sig Contact Cement good choice fuselage doublers prefer use thick CyA following construction sequence has established facilitate rapid assem bly Parakeet kit Starting fuselage laminate /I6 doublers sides making sure end up left right assembly Lightly score inside sides just aft doublers will help bend later Place right fuselage side over plan side view mark location cross braces engine mounts formers F-i through F-6 Carefully transfer marks inside left fuselage side right fuselage side flat work surface cement F-i F-2 F-3 place checking square alignment before continuing Add left side again carefully check alignment before pro ceeding Cement engine mounts place suitable glue doubt use epoxy Bend fuselage sides together 5 RISNTMAPLK ThRUSTMOTOR MOJTS II II III III ir III/ J us fi II DOWEL 3/I6II4 II Ii II iiII Ii II II I/I6 BALSA COCKPIT FLOOR 3/I6 DOWEL I/B BALSA SHEET SIDES 3/16 BALSA STRINGERS DSRSAL-. 7 TOP VIEW 44 WING ASSEMBI ASSAMALE WNG IWNELS 2 SAND DIHEDRAL ANGLE 3 ALOE ANNELS TOSETHE 4 REMOVE SECTION OF IA DRACES JAOUNT EBARLE BETh 4I/2 SHEET METAL SEDEWS -1/16 PILOT HOCKS OW LITE PLY /wING PLAT FORM SANG TO ThIS LINE SAND EDGE AS SEH3WN I/B BALSA BRACE~ GB BALSA____ BRACE 3/16 BALSA TIP SANS TO THIS LINE DR F-A RIB TEMPtATE LC WING 3/32 BALSA MAKE 12 I/4 BALSA 2 3/I6 DOWEL ENTA I93/BBA ENGINESHEET AWLITE PLY3/B 55 BALSA PAIRING -4PRDR F-K PUSI-IROOS3 SOWNTHRLISTIS SAG SO STR NGERS BALSA BALSS DES tail lightly glue Check alignment placing assembly over top view satisfied order add tapered tail block F-7 horizontal former /s6 square cross braces Install triangular braces behind F-3 thoroughly cement scored areas restore strength Glue tail cone formers add top stringers shown plan Glue F-3A bulk head place add 46 balsa cockpit floor Glue landing gear doubler place also VIE plywood nose bot tom Add extra glue fillets around landing gear doubler engine mounts needed Shape outside top block confirm t balsa pylon will fit correctly Hollow out inside top block fuel tank clearance leaving wall thickness Vs minimum satisfied shaping glue top block place add h-in square nose fairing pieces going finish cockpit plastic film now before adding side pieces fact inside surface E P1 Fl 36 Model Aviation 3AKI BALSA TOP B Quick assemble/disassembie Parakeet makes transportation service snap biplane types Time-honored rubberbands provide protection minor crashes Full-Size Plans See Page 180 MA DIA DOWELVBLITh PLYDIHEDRAL BRACE T BALSA AL BRACESLEADING EDGE WINGTEMPWI DIHEDRALI__ BALSA S/A/YYYIIICENTER SECT AIRFOIL1J WEBSI ---I/B BALSA VB UTE__ BRACEBIBS DIHEDRAL/4 BALSA -BRACE GPLANUPPER CEESOR B jK3/52BALSAI / SOLID BALSARID r /I CENTER SECTIONI r J K 3/IAEI IPLY DIHEDRAL AILDIHEDRAL BRACE5/IA I-V4 BALSA SMALL HORN EDGE LEADING EDGXLOWER WINGTYPICALI DOWEL BOTTOM WINS HINGE /_ _ __ ____ ____ ____ ____ ____ BALSA SPARS3/IA BALSAjIVBLITE1II WEBS lOIFREvPLY TOP B BOTTOMIIIII 1RIS/IABALSA ___ __ j/ ____ _______________ SlEET IjJ BS/4 MAPLE APE 2 3AA BALSA SHEET POSHMAPLE MOTOR 3/IA BALSA PEMOUNTO SHEET HO LOW lOP IN MOUNTLITE 3/IA BALSABLOCK AS SlI PLYWINDSHIELD BALSA -SHAPE AS SHOWN VIEW ERBALL LINKS___ \\- S/IA BALSA DOUBLER MA BALSA PL B BALSA //II/IA OJ-BRO [v33][b-1-10-1-10]]I FIN[ A ____________________ ____ SAl HORN BA SA BOTTOM~I -4 _____ _______PUSHRODS____WING STRUTS TABBATI KRAPT I3/IASO BALSA RECEIVERAzA4 i J555J___________________- SERVO___________________ ______SERVOS_________________ MINI SNAP-LINK/-GOLDBERG NYLON -- -------J-- I"TAILWHEEL BRACKET .CBiB ____If S/IA SO BALSA CROSS PIECS j PLACE APTER TAIL IP6 VIA BALSABALSAVIA-3/4DIAI/IAMA SO BALSA PLYVIA WIRE BOTTOMTAILBLOOPLY S PIECES SHEET SIDES I/B BALSA 4 3/B SHEET METALF-71W MWNT SCREWSII/IAPILOT HOLEII/BLITES/IABALSA PLY GESA CLIPS 3 REOD LG DOUBLERL/B MUSIC FRONT VIEW BALANCE PONT DOJA ER 0 EE S LG CLAMP DETAIL SPECIFICATIONS WING SPAN42 LENGTH34 WEIGHT 2-1/2 LBS CHBRNELS3 ENGINEIS TOSS 02345A MODEL AVIATION PARAKEET DESIGNED B DRAWN BY DAVE ROBELEN TRACING BY rOE DEMARCO blOhdYft rBrRwn - -~WING - - side pieces should also covered before assembly Glue side pieces place stripping away covering glue joint Glue 46 balsa tail cone bottom plywood tail wheel mount place After checking glue joints once shape sand entire fuselage contours shown plan Shape sand headrest also attach yet Assemble balsa pylon pieces sand contours shown Leave top bottom surfaces square well portion glued top block Shape sand -in plywood wing mount leave loose also Round up various 3/IA balsa tail pieces make sure fit properly fuselage other Join ele vators Y16 dowel shown Shape tail surfaces sand smooth Edges should rounded except hinge lines Refer plan contour sand sharp bevel front rudder elevators back edge fin stabilizer should left pylon-mounted top wing major departure usual array cabane struts wires etc builds easily makes easy assembly problemfree wing alignment February 1987 37 LANDING GEAR PATTERN square Set fuselage tail components aside prepare construct wings idea complete construction work before applying covering ma terial way covering process can completed interruption wing construction select flat smooth work surface free bends twists use old hollow door works great sheet Celotex ceiling material placed top work board will provide ideal surface stick pins Fasten plan sheet place smoothing out wrinkles cover wing areas clear plastic sheet such backing Super MonoKote Begin pinning bottom spars trailing edges plan Cement various ribs place taking care stick two center ribs together hstall spar webbing top spars Cement leading edge dowels place clamp securely good glue joints glue really dry remove two panels plan smooth ends sanding block Trim tip plates fit adding i-in balsa braces shown Carefully use sanding block trim center ribs dihedral angle shown glue two panels together Once glue dry remove section center ribs shown install plywood spar brace Glue carefully please Trim sand entire wing until smooth top wing follows same pattern construction except center panel sweep angle Take care trimming fitting various spars leading edge dowels sweep angle proper fit necessary ensure strong joints Shape dihedral angle ends two wing panels leaving center block square sides Borrow household vacuum cleaner thoroughly remove dust Cover various components material choice recommend Super Mono Kote Recheck wings very carefully warps correct problems stage should check again after 48 hours since amount shrinkage can dependent aging humidity other factors Assembly First glue tail components together mount fuselage Strap bottom wing place order check alignment Make sure stabil izer level viewed both front rear parallel bottom lower wing sure fin centerline standing exactly vertical Cut away covering parts joined install pylon its top plate Glue carefully good joint Strap top wing place gluing plywood plate again check align ment thoroughly Check incidence too bottom surface both wings should parallel Once satisfied wing alignment mount struts Fasten ball pieces struts locations shown mark location nylon socket pieces Drill pierce holes spars sockets snap sockets onto bails slip strut assembly back between wings Force nylon sockets holes bring wings tight against struts Twist nylon sockets holes remove play strut glue sockets securely place Hot Stuff other CyA glue Now can unsnap struts sideways put safe place Carefully fit control surfaces place hinges goal have minimum gap hinge line yet retain very free movement use flexible plastic strip hinges fasten Hot Stuff other excellent choices Make up tail wheel assembly fasten place appropriate glue screws etc Once again check carefully smooth free movement before proceeding Mount two control horns shown construct pushrods /16 square balsa wire ends use mini snap links rods tail soft /16 wire inside cabin Slip rods place check smooth easy movement hand Install windshield pilot Mine 2-in-scale Williams Brothers Make up fuel tank mount shown Install tank sliding rear until metal tubes extend through firewalls wrap some strapping tape around tank leave tab back will mighty handy future maintenance Mount engine checking get proper side thrust am partial sheet metal screws holding engine like nuts bolts guest Trim nose clear muffler maybe needle valve install throttle drive linkage Remove engine coat nose fuel proofer thin epoxy glue works great paint engine compartment match model Mount landing gear nylon clamps h-in x #4 sheet metal screws install wheels choice Balance test fly Remount engine place RC equipment loosely fuselage shown plan Strap wings support model fingertips under fuselage location shown necessary move battery and/or servos achieve balance Final-mount RC equipment wrap ping battery receiver softly sponge get excellent results servomounting tape however should con sult literature set use method manufacturer recommends Finish pushrods throttle linkage set control movements elevator Ii up down rudder right Range check radio engine running speeds make sure engine will maintain good power full throttle point nose up 450 Fill tank taxi around bit field surface permits first takeoff point Parakeet directly wind advance throttle evenly punch open quickly Once tail up ground speed looks normal small tug up will lift off easily Once acquainted new little beauty feel free try different control throws CG positions until bird feels just right After have some practice crosswind takeoffs landings fine Just get ground speed up before attempting lift off 38 Model Aviation long-legged Parakeet equally home pavement grass Tracking great theres ample prop clearance models compact size makes great schoolyards
Edition: Model Aviation - 1987/02
Page Numbers: 32, 33, 34, 35, 36, 37, 38
NO OCR TEXT NO OCR TEXT author checks Parakeet over carefully before another action-packed flight Always watchful model wing warps changes control reactions inputs Wing setup perform smooth axial rolling maneuvers rudder input yaw requires strong yaw-roll coupling YRC directly influenced amount effective dihedral present course could obtain sufficient YRC straight wings generous dihedral angle other possibilities example sweeping wing back will produce effect dihedral increase YRC value given dihedral angle Since full-scale biplanes use some sweep upper wing chose sweep Parakeets top wing moderate amount enhancing YRC exaggerating dihedral years Free Flight modelers have occasion good results used top-mounted forward fin pylon wing struts added help fortify wing against occasional nose-overs Balland-socket joints allow excellent knockapart protection really rough landing enhance YRC various models pylon-type mount top wing seemed natural choice Parakeet since rugged simple adds YRC value As result actual dihedral angle Para keets wings rather modest still little Left The instruments Tatone pilot Williams Bros pane sranea piywooa takes few minutes adds much realism Right 08 Max 25 engine perfect mate model Use wooden engine mounts dampen vibration Left Dave used control hardware Goldberg tail wheel sig Excellent accessories abound check local dealer find what suits best Right Plenty room servos Simple rugged wire landing gear provides plenty shock absorption 34 Model Aviation E ROBELEN jYDA BALSA 4 yLITE PLY 9 5ALSASHEEJ BALSA BLOCK 15-25 TWO STROKE K -PLY 4gPLY 7 \ A DOUbLER AL5AXDWHEEL 77 7 BALL LINKS7 [ITEPLYC 46x A SPAR TYPICAL DOWEL BALSA RIBS 4DWHEELS JYPICAL MUSIc WIRE C bird has tremendous roll response just rudder control no interplane struts early models after seasons flying began notice some chronic problems biggest nuisance keeping top wing tightly clamped place during roll maneuvers wanted tilt roll too occasional top wing spar would crack violent nose-over landing order minimize drag hadnt used struts first place drag penalty turned out small comparatively added struts Refer plan novel hassle-free method mounting Having settled wing system decided use fuselage tail design patterned generally after home-built single-seat EAA-type biplanes addition followed design concept earlier Pronto model whenever suitable stuck stock 3-in-wide woodless expen sive readily available selected tail-dragger landing gear setup since nose wheel biplane would look just plain ridiculous Equally important tail-dragger model can op erate out small bumpy fields problems nose wheel drags grass gets knocked out alignment adds needless weight Thats right Im prejudiced rate Vs-in wire landing gear has proven have excellent tracking takeoff no ground loops reasonably low weight superior re sistance damage wheel position shown plans good average both smooth grass paved runways fly off really bumpy strips thick grass just bend wheels forward about inch get the Parakeet need consider own flying pref erences before choosing engine example strong 15 Enya 15 IV completely adequate normal flying moderate maneuvering pilot wants really strong aerobatics capability 25-size engine good choice recommend FSR-type engines Parakeet engines get best results Master Airscrew 9-4 Whatever flying style pref erence start modest control move ments rudder right elevator own Use balance location shown plans good starting point Most hotdog pilots will want use control movement youll probably move balance point rearward enhance snap roll ma neuvers changes should made tried out time using ample altitude about two mistakes high during check flights Construction notes approach building Parakeet round up necessary materials make kit prepared parts before beginning assem builders have excellent results using thick cyanoacrylate CyA glues exclusively have concerns about strength would recommend Sig Epoxy something similar engine mounts wing center joints Sig Contact Cement good choice fuselage doublers prefer use thick CyA following construction sequence has established facilitate rapid assem bly Parakeet kit Starting fuselage laminate /I6 doublers sides making sure end up left right assembly Lightly score inside sides just aft doublers will help bend later Place right fuselage side over plan side view mark location cross braces engine mounts formers F-i through F-6 Carefully transfer marks inside left fuselage side right fuselage side flat work surface cement F-i F-2 F-3 place checking square alignment before continuing Add left side again carefully check alignment before pro ceeding Cement engine mounts place suitable glue doubt use epoxy Bend fuselage sides together 5 RISNTMAPLK ThRUSTMOTOR MOJTS II II III III ir III/ J us fi II DOWEL 3/I6II4 II Ii II iiII Ii II II I/I6 BALSA COCKPIT FLOOR 3/I6 DOWEL I/B BALSA SHEET SIDES 3/16 BALSA STRINGERS DSRSAL-. 7 TOP VIEW 44 WING ASSEMBI ASSAMALE WNG IWNELS 2 SAND DIHEDRAL ANGLE 3 ALOE ANNELS TOSETHE 4 REMOVE SECTION OF IA DRACES JAOUNT EBARLE BETh 4I/2 SHEET METAL SEDEWS -1/16 PILOT HOCKS OW LITE PLY /wING PLAT FORM SANG TO ThIS LINE SAND EDGE AS SEH3WN I/B BALSA BRACE~ GB BALSA____ BRACE 3/16 BALSA TIP SANS TO THIS LINE DR F-A RIB TEMPtATE LC WING 3/32 BALSA MAKE 12 I/4 BALSA 2 3/I6 DOWEL ENTA I93/BBA ENGINESHEET AWLITE PLY3/B 55 BALSA PAIRING -4PRDR F-K PUSI-IROOS3 SOWNTHRLISTIS SAG SO STR NGERS BALSA BALSS DES tail lightly glue Check alignment placing assembly over top view satisfied order add tapered tail block F-7 horizontal former /s6 square cross braces Install triangular braces behind F-3 thoroughly cement scored areas restore strength Glue tail cone formers add top stringers shown plan Glue F-3A bulk head place add 46 balsa cockpit floor Glue landing gear doubler place also VIE plywood nose bot tom Add extra glue fillets around landing gear doubler engine mounts needed Shape outside top block confirm t balsa pylon will fit correctly Hollow out inside top block fuel tank clearance leaving wall thickness Vs minimum satisfied shaping glue top block place add h-in square nose fairing pieces going finish cockpit plastic film now before adding side pieces fact inside surface E P1 Fl 36 Model Aviation 3AKI BALSA TOP B Quick assemble/disassembie Parakeet makes transportation service snap biplane types Time-honored rubberbands provide protection minor crashes Full-Size Plans See Page 180 MA DIA DOWELVBLITh PLYDIHEDRAL BRACE T BALSA AL BRACESLEADING EDGE WINGTEMPWI DIHEDRALI__ BALSA S/A/YYYIIICENTER SECT AIRFOIL1J WEBSI ---I/B BALSA VB UTE__ BRACEBIBS DIHEDRAL/4 BALSA -BRACE GPLANUPPER CEESOR B jK3/52BALSAI / SOLID BALSARID r /I CENTER SECTIONI r J K 3/IAEI IPLY DIHEDRAL AILDIHEDRAL BRACE5/IA I-V4 BALSA SMALL HORN EDGE LEADING EDGXLOWER WINGTYPICALI DOWEL BOTTOM WINS HINGE /_ _ __ ____ ____ ____ ____ ____ BALSA SPARS3/IA BALSAjIVBLITE1II WEBS lOIFREvPLY TOP B BOTTOMIIIII 1RIS/IABALSA ___ __ j/ ____ _______________ SlEET IjJ BS/4 MAPLE APE 2 3AA BALSA SHEET POSHMAPLE MOTOR 3/IA BALSA PEMOUNTO SHEET HO LOW lOP IN MOUNTLITE 3/IA BALSABLOCK AS SlI PLYWINDSHIELD BALSA -SHAPE AS SHOWN VIEW ERBALL LINKS___ \\- S/IA BALSA DOUBLER MA BALSA PL B BALSA //II/IA OJ-BRO [v33][b-1-10-1-10]]I FIN[ A ____________________ ____ SAl HORN BA SA BOTTOM~I -4 _____ _______PUSHRODS____WING STRUTS TABBATI KRAPT I3/IASO BALSA RECEIVERAzA4 i J555J___________________- SERVO___________________ ______SERVOS_________________ MINI SNAP-LINK/-GOLDBERG NYLON -- -------J-- I"TAILWHEEL BRACKET .CBiB ____If S/IA SO BALSA CROSS PIECS j PLACE APTER TAIL IP6 VIA BALSABALSAVIA-3/4DIAI/IAMA SO BALSA PLYVIA WIRE BOTTOMTAILBLOOPLY S PIECES SHEET SIDES I/B BALSA 4 3/B SHEET METALF-71W MWNT SCREWSII/IAPILOT HOLEII/BLITES/IABALSA PLY GESA CLIPS 3 REOD LG DOUBLERL/B MUSIC FRONT VIEW BALANCE PONT DOJA ER 0 EE S LG CLAMP DETAIL SPECIFICATIONS WING SPAN42 LENGTH34 WEIGHT 2-1/2 LBS CHBRNELS3 ENGINEIS TOSS 02345A MODEL AVIATION PARAKEET DESIGNED B DRAWN BY DAVE ROBELEN TRACING BY rOE DEMARCO blOhdYft rBrRwn - -~WING - - side pieces should also covered before assembly Glue side pieces place stripping away covering glue joint Glue 46 balsa tail cone bottom plywood tail wheel mount place After checking glue joints once shape sand entire fuselage contours shown plan Shape sand headrest also attach yet Assemble balsa pylon pieces sand contours shown Leave top bottom surfaces square well portion glued top block Shape sand -in plywood wing mount leave loose also Round up various 3/IA balsa tail pieces make sure fit properly fuselage other Join ele vators Y16 dowel shown Shape tail surfaces sand smooth Edges should rounded except hinge lines Refer plan contour sand sharp bevel front rudder elevators back edge fin stabilizer should left pylon-mounted top wing major departure usual array cabane struts wires etc builds easily makes easy assembly problemfree wing alignment February 1987 37 LANDING GEAR PATTERN square Set fuselage tail components aside prepare construct wings idea complete construction work before applying covering ma terial way covering process can completed interruption wing construction select flat smooth work surface free bends twists use old hollow door works great sheet Celotex ceiling material placed top work board will provide ideal surface stick pins Fasten plan sheet place smoothing out wrinkles cover wing areas clear plastic sheet such backing Super MonoKote Begin pinning bottom spars trailing edges plan Cement various ribs place taking care stick two center ribs together hstall spar webbing top spars Cement leading edge dowels place clamp securely good glue joints glue really dry remove two panels plan smooth ends sanding block Trim tip plates fit adding i-in balsa braces shown Carefully use sanding block trim center ribs dihedral angle shown glue two panels together Once glue dry remove section center ribs shown install plywood spar brace Glue carefully please Trim sand entire wing until smooth top wing follows same pattern construction except center panel sweep angle Take care trimming fitting various spars leading edge dowels sweep angle proper fit necessary ensure strong joints Shape dihedral angle ends two wing panels leaving center block square sides Borrow household vacuum cleaner thoroughly remove dust Cover various components material choice recommend Super Mono Kote Recheck wings very carefully warps correct problems stage should check again after 48 hours since amount shrinkage can dependent aging humidity other factors Assembly First glue tail components together mount fuselage Strap bottom wing place order check alignment Make sure stabil izer level viewed both front rear parallel bottom lower wing sure fin centerline standing exactly vertical Cut away covering parts joined install pylon its top plate Glue carefully good joint Strap top wing place gluing plywood plate again check align ment thoroughly Check incidence too bottom surface both wings should parallel Once satisfied wing alignment mount struts Fasten ball pieces struts locations shown mark location nylon socket pieces Drill pierce holes spars sockets snap sockets onto bails slip strut assembly back between wings Force nylon sockets holes bring wings tight against struts Twist nylon sockets holes remove play strut glue sockets securely place Hot Stuff other CyA glue Now can unsnap struts sideways put safe place Carefully fit control surfaces place hinges goal have minimum gap hinge line yet retain very free movement use flexible plastic strip hinges fasten Hot Stuff other excellent choices Make up tail wheel assembly fasten place appropriate glue screws etc Once again check carefully smooth free movement before proceeding Mount two control horns shown construct pushrods /16 square balsa wire ends use mini snap links rods tail soft /16 wire inside cabin Slip rods place check smooth easy movement hand Install windshield pilot Mine 2-in-scale Williams Brothers Make up fuel tank mount shown Install tank sliding rear until metal tubes extend through firewalls wrap some strapping tape around tank leave tab back will mighty handy future maintenance Mount engine checking get proper side thrust am partial sheet metal screws holding engine like nuts bolts guest Trim nose clear muffler maybe needle valve install throttle drive linkage Remove engine coat nose fuel proofer thin epoxy glue works great paint engine compartment match model Mount landing gear nylon clamps h-in x #4 sheet metal screws install wheels choice Balance test fly Remount engine place RC equipment loosely fuselage shown plan Strap wings support model fingertips under fuselage location shown necessary move battery and/or servos achieve balance Final-mount RC equipment wrap ping battery receiver softly sponge get excellent results servomounting tape however should con sult literature set use method manufacturer recommends Finish pushrods throttle linkage set control movements elevator Ii up down rudder right Range check radio engine running speeds make sure engine will maintain good power full throttle point nose up 450 Fill tank taxi around bit field surface permits first takeoff point Parakeet directly wind advance throttle evenly punch open quickly Once tail up ground speed looks normal small tug up will lift off easily Once acquainted new little beauty feel free try different control throws CG positions until bird feels just right After have some practice crosswind takeoffs landings fine Just get ground speed up before attempting lift off 38 Model Aviation long-legged Parakeet equally home pavement grass Tracking great theres ample prop clearance models compact size makes great schoolyards
Edition: Model Aviation - 1987/02
Page Numbers: 32, 33, 34, 35, 36, 37, 38
NO OCR TEXT NO OCR TEXT author checks Parakeet over carefully before another action-packed flight Always watchful model wing warps changes control reactions inputs Wing setup perform smooth axial rolling maneuvers rudder input yaw requires strong yaw-roll coupling YRC directly influenced amount effective dihedral present course could obtain sufficient YRC straight wings generous dihedral angle other possibilities example sweeping wing back will produce effect dihedral increase YRC value given dihedral angle Since full-scale biplanes use some sweep upper wing chose sweep Parakeets top wing moderate amount enhancing YRC exaggerating dihedral years Free Flight modelers have occasion good results used top-mounted forward fin pylon wing struts added help fortify wing against occasional nose-overs Balland-socket joints allow excellent knockapart protection really rough landing enhance YRC various models pylon-type mount top wing seemed natural choice Parakeet since rugged simple adds YRC value As result actual dihedral angle Para keets wings rather modest still little Left The instruments Tatone pilot Williams Bros pane sranea piywooa takes few minutes adds much realism Right 08 Max 25 engine perfect mate model Use wooden engine mounts dampen vibration Left Dave used control hardware Goldberg tail wheel sig Excellent accessories abound check local dealer find what suits best Right Plenty room servos Simple rugged wire landing gear provides plenty shock absorption 34 Model Aviation E ROBELEN jYDA BALSA 4 yLITE PLY 9 5ALSASHEEJ BALSA BLOCK 15-25 TWO STROKE K -PLY 4gPLY 7 \ A DOUbLER AL5AXDWHEEL 77 7 BALL LINKS7 [ITEPLYC 46x A SPAR TYPICAL DOWEL BALSA RIBS 4DWHEELS JYPICAL MUSIc WIRE C bird has tremendous roll response just rudder control no interplane struts early models after seasons flying began notice some chronic problems biggest nuisance keeping top wing tightly clamped place during roll maneuvers wanted tilt roll too occasional top wing spar would crack violent nose-over landing order minimize drag hadnt used struts first place drag penalty turned out small comparatively added struts Refer plan novel hassle-free method mounting Having settled wing system decided use fuselage tail design patterned generally after home-built single-seat EAA-type biplanes addition followed design concept earlier Pronto model whenever suitable stuck stock 3-in-wide woodless expen sive readily available selected tail-dragger landing gear setup since nose wheel biplane would look just plain ridiculous Equally important tail-dragger model can op erate out small bumpy fields problems nose wheel drags grass gets knocked out alignment adds needless weight Thats right Im prejudiced rate Vs-in wire landing gear has proven have excellent tracking takeoff no ground loops reasonably low weight superior re sistance damage wheel position shown plans good average both smooth grass paved runways fly off really bumpy strips thick grass just bend wheels forward about inch get the Parakeet need consider own flying pref erences before choosing engine example strong 15 Enya 15 IV completely adequate normal flying moderate maneuvering pilot wants really strong aerobatics capability 25-size engine good choice recommend FSR-type engines Parakeet engines get best results Master Airscrew 9-4 Whatever flying style pref erence start modest control move ments rudder right elevator own Use balance location shown plans good starting point Most hotdog pilots will want use control movement youll probably move balance point rearward enhance snap roll ma neuvers changes should made tried out time using ample altitude about two mistakes high during check flights Construction notes approach building Parakeet round up necessary materials make kit prepared parts before beginning assem builders have excellent results using thick cyanoacrylate CyA glues exclusively have concerns about strength would recommend Sig Epoxy something similar engine mounts wing center joints Sig Contact Cement good choice fuselage doublers prefer use thick CyA following construction sequence has established facilitate rapid assem bly Parakeet kit Starting fuselage laminate /I6 doublers sides making sure end up left right assembly Lightly score inside sides just aft doublers will help bend later Place right fuselage side over plan side view mark location cross braces engine mounts formers F-i through F-6 Carefully transfer marks inside left fuselage side right fuselage side flat work surface cement F-i F-2 F-3 place checking square alignment before continuing Add left side again carefully check alignment before pro ceeding Cement engine mounts place suitable glue doubt use epoxy Bend fuselage sides together 5 RISNTMAPLK ThRUSTMOTOR MOJTS II II III III ir III/ J us fi II DOWEL 3/I6II4 II Ii II iiII Ii II II I/I6 BALSA COCKPIT FLOOR 3/I6 DOWEL I/B BALSA SHEET SIDES 3/16 BALSA STRINGERS DSRSAL-. 7 TOP VIEW 44 WING ASSEMBI ASSAMALE WNG IWNELS 2 SAND DIHEDRAL ANGLE 3 ALOE ANNELS TOSETHE 4 REMOVE SECTION OF IA DRACES JAOUNT EBARLE BETh 4I/2 SHEET METAL SEDEWS -1/16 PILOT HOCKS OW LITE PLY /wING PLAT FORM SANG TO ThIS LINE SAND EDGE AS SEH3WN I/B BALSA BRACE~ GB BALSA____ BRACE 3/16 BALSA TIP SANS TO THIS LINE DR F-A RIB TEMPtATE LC WING 3/32 BALSA MAKE 12 I/4 BALSA 2 3/I6 DOWEL ENTA I93/BBA ENGINESHEET AWLITE PLY3/B 55 BALSA PAIRING -4PRDR F-K PUSI-IROOS3 SOWNTHRLISTIS SAG SO STR NGERS BALSA BALSS DES tail lightly glue Check alignment placing assembly over top view satisfied order add tapered tail block F-7 horizontal former /s6 square cross braces Install triangular braces behind F-3 thoroughly cement scored areas restore strength Glue tail cone formers add top stringers shown plan Glue F-3A bulk head place add 46 balsa cockpit floor Glue landing gear doubler place also VIE plywood nose bot tom Add extra glue fillets around landing gear doubler engine mounts needed Shape outside top block confirm t balsa pylon will fit correctly Hollow out inside top block fuel tank clearance leaving wall thickness Vs minimum satisfied shaping glue top block place add h-in square nose fairing pieces going finish cockpit plastic film now before adding side pieces fact inside surface E P1 Fl 36 Model Aviation 3AKI BALSA TOP B Quick assemble/disassembie Parakeet makes transportation service snap biplane types Time-honored rubberbands provide protection minor crashes Full-Size Plans See Page 180 MA DIA DOWELVBLITh PLYDIHEDRAL BRACE T BALSA AL BRACESLEADING EDGE WINGTEMPWI DIHEDRALI__ BALSA S/A/YYYIIICENTER SECT AIRFOIL1J WEBSI ---I/B BALSA VB UTE__ BRACEBIBS DIHEDRAL/4 BALSA -BRACE GPLANUPPER CEESOR B jK3/52BALSAI / SOLID BALSARID r /I CENTER SECTIONI r J K 3/IAEI IPLY DIHEDRAL AILDIHEDRAL BRACE5/IA I-V4 BALSA SMALL HORN EDGE LEADING EDGXLOWER WINGTYPICALI DOWEL BOTTOM WINS HINGE /_ _ __ ____ ____ ____ ____ ____ BALSA SPARS3/IA BALSAjIVBLITE1II WEBS lOIFREvPLY TOP B BOTTOMIIIII 1RIS/IABALSA ___ __ j/ ____ _______________ SlEET IjJ BS/4 MAPLE APE 2 3AA BALSA SHEET POSHMAPLE MOTOR 3/IA BALSA PEMOUNTO SHEET HO LOW lOP IN MOUNTLITE 3/IA BALSABLOCK AS SlI PLYWINDSHIELD BALSA -SHAPE AS SHOWN VIEW ERBALL LINKS___ \\- S/IA BALSA DOUBLER MA BALSA PL B BALSA //II/IA OJ-BRO [v33][b-1-10-1-10]]I FIN[ A ____________________ ____ SAl HORN BA SA BOTTOM~I -4 _____ _______PUSHRODS____WING STRUTS TABBATI KRAPT I3/IASO BALSA RECEIVERAzA4 i J555J___________________- SERVO___________________ ______SERVOS_________________ MINI SNAP-LINK/-GOLDBERG NYLON -- -------J-- I"TAILWHEEL BRACKET .CBiB ____If S/IA SO BALSA CROSS PIECS j PLACE APTER TAIL IP6 VIA BALSABALSAVIA-3/4DIAI/IAMA SO BALSA PLYVIA WIRE BOTTOMTAILBLOOPLY S PIECES SHEET SIDES I/B BALSA 4 3/B SHEET METALF-71W MWNT SCREWSII/IAPILOT HOLEII/BLITES/IABALSA PLY GESA CLIPS 3 REOD LG DOUBLERL/B MUSIC FRONT VIEW BALANCE PONT DOJA ER 0 EE S LG CLAMP DETAIL SPECIFICATIONS WING SPAN42 LENGTH34 WEIGHT 2-1/2 LBS CHBRNELS3 ENGINEIS TOSS 02345A MODEL AVIATION PARAKEET DESIGNED B DRAWN BY DAVE ROBELEN TRACING BY rOE DEMARCO blOhdYft rBrRwn - -~WING - - side pieces should also covered before assembly Glue side pieces place stripping away covering glue joint Glue 46 balsa tail cone bottom plywood tail wheel mount place After checking glue joints once shape sand entire fuselage contours shown plan Shape sand headrest also attach yet Assemble balsa pylon pieces sand contours shown Leave top bottom surfaces square well portion glued top block Shape sand -in plywood wing mount leave loose also Round up various 3/IA balsa tail pieces make sure fit properly fuselage other Join ele vators Y16 dowel shown Shape tail surfaces sand smooth Edges should rounded except hinge lines Refer plan contour sand sharp bevel front rudder elevators back edge fin stabilizer should left pylon-mounted top wing major departure usual array cabane struts wires etc builds easily makes easy assembly problemfree wing alignment February 1987 37 LANDING GEAR PATTERN square Set fuselage tail components aside prepare construct wings idea complete construction work before applying covering ma terial way covering process can completed interruption wing construction select flat smooth work surface free bends twists use old hollow door works great sheet Celotex ceiling material placed top work board will provide ideal surface stick pins Fasten plan sheet place smoothing out wrinkles cover wing areas clear plastic sheet such backing Super MonoKote Begin pinning bottom spars trailing edges plan Cement various ribs place taking care stick two center ribs together hstall spar webbing top spars Cement leading edge dowels place clamp securely good glue joints glue really dry remove two panels plan smooth ends sanding block Trim tip plates fit adding i-in balsa braces shown Carefully use sanding block trim center ribs dihedral angle shown glue two panels together Once glue dry remove section center ribs shown install plywood spar brace Glue carefully please Trim sand entire wing until smooth top wing follows same pattern construction except center panel sweep angle Take care trimming fitting various spars leading edge dowels sweep angle proper fit necessary ensure strong joints Shape dihedral angle ends two wing panels leaving center block square sides Borrow household vacuum cleaner thoroughly remove dust Cover various components material choice recommend Super Mono Kote Recheck wings very carefully warps correct problems stage should check again after 48 hours since amount shrinkage can dependent aging humidity other factors Assembly First glue tail components together mount fuselage Strap bottom wing place order check alignment Make sure stabil izer level viewed both front rear parallel bottom lower wing sure fin centerline standing exactly vertical Cut away covering parts joined install pylon its top plate Glue carefully good joint Strap top wing place gluing plywood plate again check align ment thoroughly Check incidence too bottom surface both wings should parallel Once satisfied wing alignment mount struts Fasten ball pieces struts locations shown mark location nylon socket pieces Drill pierce holes spars sockets snap sockets onto bails slip strut assembly back between wings Force nylon sockets holes bring wings tight against struts Twist nylon sockets holes remove play strut glue sockets securely place Hot Stuff other CyA glue Now can unsnap struts sideways put safe place Carefully fit control surfaces place hinges goal have minimum gap hinge line yet retain very free movement use flexible plastic strip hinges fasten Hot Stuff other excellent choices Make up tail wheel assembly fasten place appropriate glue screws etc Once again check carefully smooth free movement before proceeding Mount two control horns shown construct pushrods /16 square balsa wire ends use mini snap links rods tail soft /16 wire inside cabin Slip rods place check smooth easy movement hand Install windshield pilot Mine 2-in-scale Williams Brothers Make up fuel tank mount shown Install tank sliding rear until metal tubes extend through firewalls wrap some strapping tape around tank leave tab back will mighty handy future maintenance Mount engine checking get proper side thrust am partial sheet metal screws holding engine like nuts bolts guest Trim nose clear muffler maybe needle valve install throttle drive linkage Remove engine coat nose fuel proofer thin epoxy glue works great paint engine compartment match model Mount landing gear nylon clamps h-in x #4 sheet metal screws install wheels choice Balance test fly Remount engine place RC equipment loosely fuselage shown plan Strap wings support model fingertips under fuselage location shown necessary move battery and/or servos achieve balance Final-mount RC equipment wrap ping battery receiver softly sponge get excellent results servomounting tape however should con sult literature set use method manufacturer recommends Finish pushrods throttle linkage set control movements elevator Ii up down rudder right Range check radio engine running speeds make sure engine will maintain good power full throttle point nose up 450 Fill tank taxi around bit field surface permits first takeoff point Parakeet directly wind advance throttle evenly punch open quickly Once tail up ground speed looks normal small tug up will lift off easily Once acquainted new little beauty feel free try different control throws CG positions until bird feels just right After have some practice crosswind takeoffs landings fine Just get ground speed up before attempting lift off 38 Model Aviation long-legged Parakeet equally home pavement grass Tracking great theres ample prop clearance models compact size makes great schoolyards