DONT BE AFRAID design own plane Its fun Ive always wanted afraid until got courage up last year said Im gonna being aeronautical engineer didnt anything way out few sound principles go really easier thought first step thought go through some other construction articles figure out what needed stability proportions etc very impressed Norm Pages Mach design because its size reasoning large plane easier judges see sounded logical Niris pronounced Near-iss started idea large wing area few side benefits plane size include wind penetration ease landing Thanks Norm wanted large radio compartment cause install radio two left thumbs Plus figured would need extra room first attempt retracts people make neat radio instal lations always make jealous Knowing room meant large cross-sec tion made decide go way fillets other drag-reducing items like painted canopy instead bubble type Also remember reading some higher aspect ratio lower induced drag some such thing Most pattern ships have aspect ratios order 5 6 So increased 6 base wing planform began evolve 14 root section radio compartment 7/2 tips span 66 gave nice 710 sq wing area equal taper wing chosen compromise between straight LE advantage loops effective dihedral advantage swept wing So now have wing planform What about airfoil insure tips would keep flying center begins stall out Ive incorporated built-in stall starters sharp LE near root progresses normal radius tips Also tip section should thicker center Knowing very little about airfoil theory Reynolds ef fect went back stack well-read magazines soon looking U flirjp Walter E DamuckJr Banshee airfoil Its nicest feature aft section flat youll see Know ing curvature over center important lift flow separation didnt alter However ruler quickly lengthened aft section pointed LE give 14 root 15% thick airfoil Voila tip section es sentially unchanged since 7 17% thick Now ailerons little sketching brought up ares 9% Inset style chosen because look pretty plane rolls less hinge line create drag hinge line chosen perpendicular fuselage center line torque rods would hit aft bulkhead eliminating need re lieve piece clearance Putting aileron servo bottom wing also makes much room upstairs radio gear No worry about inter ference fit foam wing large span will have fairly high moment inertia measure difficult start rolling difficult stop once starts means have lead exit roll spin 1/8 turn great advantage cutting through turbulent air Also roll rate tends remain constant cross wind Like everything else design usually ends up bunch compro mises way like fly will de termine way own design will created Now wing designed what about fuselage Starting thrust line wing set 0 degrees incidence w thrust line Ive seen true mid-wing designs hunt neutral feel due prop blast switching top wing bottom change roll too much will stop hunting Being ignorant centers pressure lift vectors yet knowing nose tail moments very important again returned other designs advice See easy design using proven ideas Using average chord length unit measure designs have prop 1 times average chord ahead CG elevator hinge line three times average chord behind CG changed slightly shortened tail moment 28 because proOctober1975 21 Niris posed incluson snap maneu vers pattern started out draw ing nose moment mentioned noticed retracts would tight fit So nose lengthened accommodate gear side benefit combination virtually impossible make tailbeavy plane way believe try next item consider stab Since short tail will make plane pitch sensitive stab 25% wing area instead usual 20-21% seemed right direction go help effectiveness stab raised 1 above thrust line long planform helps put some outside propwash Ever since Orion Taurus diamond section stab has way fly help reduce drag sharp LE again used Movable stab 25% total also meets current trends Now rudder previous bird kit t 9% 22 Model Aviation wing area Actually whole tail LE stab back acts like rudder dont forget include area figuring Anyway 9% rudder wig gles once increased 12% eliminate sensitivity around neutral tried diamond airfoil rudder Know what works least doesnt hurt thanks Jim Martin idea triangular rudder Besides looking sharp makes area very easy calculate movable por tion non-critical plenty rudder needed knife-edge spin forth About 40% vertical area seemed good thing remember however closer can get distribution about thrust line less October1975 23 picture worth thousand words au thor installed innards capacious cabin Close-up coclcpit designer also avoided turbulence-creating glued-on canopy Niris rudder will impart roll component Also further away TE hinge effect square inch has Niriss rudder does give bit roll either level flight knife edge An other item will contribute roll rudder shape wing tips seems upswept tip will make rudder command roll plane Look H-Rays tips sometime So sure sand tips symmetrical So far have wing rudder stab What about rest body Important thing insure radio tank retracts etc would fit drew first Next since body side acts like wing during knifeedge flight area proportions should 25% ahead CG 75% behind meant lot area up front Niris has tendency look like dolphin total side area about 200 sq flies well four-point rolls chose 4 wide again room radio compart ment keep engines carburetor line fuel tank engine tilted 45 degrees rather horizontal Dont forget add about e lead left wing tip compensate engine being off center actual structural details easy just followed modelers nose about strength needed Try get light weight wood especially block Besides being lighter up 6 oz block alone much easier sand exception stab use built-up configuration sure use stiff 1/16 sheet skinning use soft wood first first full bore split S actually ended up being split stab top sheet started vibrate like drum head cracked rebuilt stab stiff quarter-grain wood 200 flights later still fine foam stab would work also building wing put LE TE sand shown plans sheet wing using epoxy tach sheet LE TE Use 6-32 screw soldering pencil cut channel aileron torque rod An easy set bearings can made fol lows Grease Vaseline ends continued page 78 24 Model Aviation Finished 60-powered aircraft makes pretty pic ture see familiar features its because designer studied other ships Niris continued measure pin ribs place Once ribs LE place can removed sheeting can applied Notice top rudder nar rower bottom insures smooth line high point air foil TE Speaking taper dont afraid use sandpaper mov able rudder just cut t Again choose light wood sands easy short word about control surface hing ing means try get little gap possible adds drag reduces ef fectiveness surface air gap best way know make front surface V shaped its corresponding fixed surface flat shown plans hinge pin should cen tered apex V re quires inset bit both sides hinge couple cuts Acto knife job done Bolt wing set level glue stab rudder filler block checking alignment go goof means bad bird take time engine cowling easy too Bolt engine slip F-l over crankshaft put prop spinner tape F- 1 back prop witti scrap 1/32 ply spacer Fill scrap sheet blocks using 5-minute epoxy Dont afraid put too much wood because after its dry can just take out engine go razor plane sanding blocks After fuelproof engine tank com partments should ready apply favorite finish tried Silk-Spun Coverite plane followed two coats Acrylic Laquer primer wet-sanded #400 wet/dry paper Fill dings auto body putty dust another coat primer Spray whole plane white mask off color Three coats clear acrylic sand #600 paper wet buff nice gloss Oh yes about fillets Either Epoxilite Micro Balloons epoxy will work fine Put after Coverite before primer Sand smooth paint nice touch personalize plane dry-transfer lettering should put after color before clear Just clean area rub spray clear over Dust couple light clear coats before laying paint heavy however letters may just float paint get out line everything checks out CG no warps etc bolt engine radio gear have fun flying CG 1 forward Niris very difficult spin landings can slowed down practically nothing fear tip stall too Ive tried fact think youll find N iris real pussycat sticks goes point very ca pable doing anything can limitation will Lo mecevak unless CG moved 1-1 Y2 rearward shown plans Dont try unless know though because can both exciting watch fun kids like pick up pieces broken airplane maneuverable also skit terish way proper CG though has absolutely no bad character istics have passed box flyer never flew anything gliders before Although slow half throttle thought ailerons made very touchy able fly problems also just loved feel ing doing axial roll 78 Model Aviation -I IF NOT AVAILABLE AT DEALER ORDER DIRECT SEND 25c FOR CATALOG 6917 West 59th Street Chicago Illinois 60638 HSI NGINEERING JIE-R5L-AL E WWII SCALE AIRCRAFT PLANS Send $100 catalogue containing copy Superseale drawing Superscale Box 201 Arlington Texas 76012
Edition: Model Aviation - 1975/10
Page Numbers: 21, 22, 23, 24, 78
DONT BE AFRAID design own plane Its fun Ive always wanted afraid until got courage up last year said Im gonna being aeronautical engineer didnt anything way out few sound principles go really easier thought first step thought go through some other construction articles figure out what needed stability proportions etc very impressed Norm Pages Mach design because its size reasoning large plane easier judges see sounded logical Niris pronounced Near-iss started idea large wing area few side benefits plane size include wind penetration ease landing Thanks Norm wanted large radio compartment cause install radio two left thumbs Plus figured would need extra room first attempt retracts people make neat radio instal lations always make jealous Knowing room meant large cross-sec tion made decide go way fillets other drag-reducing items like painted canopy instead bubble type Also remember reading some higher aspect ratio lower induced drag some such thing Most pattern ships have aspect ratios order 5 6 So increased 6 base wing planform began evolve 14 root section radio compartment 7/2 tips span 66 gave nice 710 sq wing area equal taper wing chosen compromise between straight LE advantage loops effective dihedral advantage swept wing So now have wing planform What about airfoil insure tips would keep flying center begins stall out Ive incorporated built-in stall starters sharp LE near root progresses normal radius tips Also tip section should thicker center Knowing very little about airfoil theory Reynolds ef fect went back stack well-read magazines soon looking U flirjp Walter E DamuckJr Banshee airfoil Its nicest feature aft section flat youll see Know ing curvature over center important lift flow separation didnt alter However ruler quickly lengthened aft section pointed LE give 14 root 15% thick airfoil Voila tip section es sentially unchanged since 7 17% thick Now ailerons little sketching brought up ares 9% Inset style chosen because look pretty plane rolls less hinge line create drag hinge line chosen perpendicular fuselage center line torque rods would hit aft bulkhead eliminating need re lieve piece clearance Putting aileron servo bottom wing also makes much room upstairs radio gear No worry about inter ference fit foam wing large span will have fairly high moment inertia measure difficult start rolling difficult stop once starts means have lead exit roll spin 1/8 turn great advantage cutting through turbulent air Also roll rate tends remain constant cross wind Like everything else design usually ends up bunch compro mises way like fly will de termine way own design will created Now wing designed what about fuselage Starting thrust line wing set 0 degrees incidence w thrust line Ive seen true mid-wing designs hunt neutral feel due prop blast switching top wing bottom change roll too much will stop hunting Being ignorant centers pressure lift vectors yet knowing nose tail moments very important again returned other designs advice See easy design using proven ideas Using average chord length unit measure designs have prop 1 times average chord ahead CG elevator hinge line three times average chord behind CG changed slightly shortened tail moment 28 because proOctober1975 21 Niris posed incluson snap maneu vers pattern started out draw ing nose moment mentioned noticed retracts would tight fit So nose lengthened accommodate gear side benefit combination virtually impossible make tailbeavy plane way believe try next item consider stab Since short tail will make plane pitch sensitive stab 25% wing area instead usual 20-21% seemed right direction go help effectiveness stab raised 1 above thrust line long planform helps put some outside propwash Ever since Orion Taurus diamond section stab has way fly help reduce drag sharp LE again used Movable stab 25% total also meets current trends Now rudder previous bird kit t 9% 22 Model Aviation wing area Actually whole tail LE stab back acts like rudder dont forget include area figuring Anyway 9% rudder wig gles once increased 12% eliminate sensitivity around neutral tried diamond airfoil rudder Know what works least doesnt hurt thanks Jim Martin idea triangular rudder Besides looking sharp makes area very easy calculate movable por tion non-critical plenty rudder needed knife-edge spin forth About 40% vertical area seemed good thing remember however closer can get distribution about thrust line less October1975 23 picture worth thousand words au thor installed innards capacious cabin Close-up coclcpit designer also avoided turbulence-creating glued-on canopy Niris rudder will impart roll component Also further away TE hinge effect square inch has Niriss rudder does give bit roll either level flight knife edge An other item will contribute roll rudder shape wing tips seems upswept tip will make rudder command roll plane Look H-Rays tips sometime So sure sand tips symmetrical So far have wing rudder stab What about rest body Important thing insure radio tank retracts etc would fit drew first Next since body side acts like wing during knifeedge flight area proportions should 25% ahead CG 75% behind meant lot area up front Niris has tendency look like dolphin total side area about 200 sq flies well four-point rolls chose 4 wide again room radio compart ment keep engines carburetor line fuel tank engine tilted 45 degrees rather horizontal Dont forget add about e lead left wing tip compensate engine being off center actual structural details easy just followed modelers nose about strength needed Try get light weight wood especially block Besides being lighter up 6 oz block alone much easier sand exception stab use built-up configuration sure use stiff 1/16 sheet skinning use soft wood first first full bore split S actually ended up being split stab top sheet started vibrate like drum head cracked rebuilt stab stiff quarter-grain wood 200 flights later still fine foam stab would work also building wing put LE TE sand shown plans sheet wing using epoxy tach sheet LE TE Use 6-32 screw soldering pencil cut channel aileron torque rod An easy set bearings can made fol lows Grease Vaseline ends continued page 78 24 Model Aviation Finished 60-powered aircraft makes pretty pic ture see familiar features its because designer studied other ships Niris continued measure pin ribs place Once ribs LE place can removed sheeting can applied Notice top rudder nar rower bottom insures smooth line high point air foil TE Speaking taper dont afraid use sandpaper mov able rudder just cut t Again choose light wood sands easy short word about control surface hing ing means try get little gap possible adds drag reduces ef fectiveness surface air gap best way know make front surface V shaped its corresponding fixed surface flat shown plans hinge pin should cen tered apex V re quires inset bit both sides hinge couple cuts Acto knife job done Bolt wing set level glue stab rudder filler block checking alignment go goof means bad bird take time engine cowling easy too Bolt engine slip F-l over crankshaft put prop spinner tape F- 1 back prop witti scrap 1/32 ply spacer Fill scrap sheet blocks using 5-minute epoxy Dont afraid put too much wood because after its dry can just take out engine go razor plane sanding blocks After fuelproof engine tank com partments should ready apply favorite finish tried Silk-Spun Coverite plane followed two coats Acrylic Laquer primer wet-sanded #400 wet/dry paper Fill dings auto body putty dust another coat primer Spray whole plane white mask off color Three coats clear acrylic sand #600 paper wet buff nice gloss Oh yes about fillets Either Epoxilite Micro Balloons epoxy will work fine Put after Coverite before primer Sand smooth paint nice touch personalize plane dry-transfer lettering should put after color before clear Just clean area rub spray clear over Dust couple light clear coats before laying paint heavy however letters may just float paint get out line everything checks out CG no warps etc bolt engine radio gear have fun flying CG 1 forward Niris very difficult spin landings can slowed down practically nothing fear tip stall too Ive tried fact think youll find N iris real pussycat sticks goes point very ca pable doing anything can limitation will Lo mecevak unless CG moved 1-1 Y2 rearward shown plans Dont try unless know though because can both exciting watch fun kids like pick up pieces broken airplane maneuverable also skit terish way proper CG though has absolutely no bad character istics have passed box flyer never flew anything gliders before Although slow half throttle thought ailerons made very touchy able fly problems also just loved feel ing doing axial roll 78 Model Aviation -I IF NOT AVAILABLE AT DEALER ORDER DIRECT SEND 25c FOR CATALOG 6917 West 59th Street Chicago Illinois 60638 HSI NGINEERING JIE-R5L-AL E WWII SCALE AIRCRAFT PLANS Send $100 catalogue containing copy Superseale drawing Superscale Box 201 Arlington Texas 76012
Edition: Model Aviation - 1975/10
Page Numbers: 21, 22, 23, 24, 78
DONT BE AFRAID design own plane Its fun Ive always wanted afraid until got courage up last year said Im gonna being aeronautical engineer didnt anything way out few sound principles go really easier thought first step thought go through some other construction articles figure out what needed stability proportions etc very impressed Norm Pages Mach design because its size reasoning large plane easier judges see sounded logical Niris pronounced Near-iss started idea large wing area few side benefits plane size include wind penetration ease landing Thanks Norm wanted large radio compartment cause install radio two left thumbs Plus figured would need extra room first attempt retracts people make neat radio instal lations always make jealous Knowing room meant large cross-sec tion made decide go way fillets other drag-reducing items like painted canopy instead bubble type Also remember reading some higher aspect ratio lower induced drag some such thing Most pattern ships have aspect ratios order 5 6 So increased 6 base wing planform began evolve 14 root section radio compartment 7/2 tips span 66 gave nice 710 sq wing area equal taper wing chosen compromise between straight LE advantage loops effective dihedral advantage swept wing So now have wing planform What about airfoil insure tips would keep flying center begins stall out Ive incorporated built-in stall starters sharp LE near root progresses normal radius tips Also tip section should thicker center Knowing very little about airfoil theory Reynolds ef fect went back stack well-read magazines soon looking U flirjp Walter E DamuckJr Banshee airfoil Its nicest feature aft section flat youll see Know ing curvature over center important lift flow separation didnt alter However ruler quickly lengthened aft section pointed LE give 14 root 15% thick airfoil Voila tip section es sentially unchanged since 7 17% thick Now ailerons little sketching brought up ares 9% Inset style chosen because look pretty plane rolls less hinge line create drag hinge line chosen perpendicular fuselage center line torque rods would hit aft bulkhead eliminating need re lieve piece clearance Putting aileron servo bottom wing also makes much room upstairs radio gear No worry about inter ference fit foam wing large span will have fairly high moment inertia measure difficult start rolling difficult stop once starts means have lead exit roll spin 1/8 turn great advantage cutting through turbulent air Also roll rate tends remain constant cross wind Like everything else design usually ends up bunch compro mises way like fly will de termine way own design will created Now wing designed what about fuselage Starting thrust line wing set 0 degrees incidence w thrust line Ive seen true mid-wing designs hunt neutral feel due prop blast switching top wing bottom change roll too much will stop hunting Being ignorant centers pressure lift vectors yet knowing nose tail moments very important again returned other designs advice See easy design using proven ideas Using average chord length unit measure designs have prop 1 times average chord ahead CG elevator hinge line three times average chord behind CG changed slightly shortened tail moment 28 because proOctober1975 21 Niris posed incluson snap maneu vers pattern started out draw ing nose moment mentioned noticed retracts would tight fit So nose lengthened accommodate gear side benefit combination virtually impossible make tailbeavy plane way believe try next item consider stab Since short tail will make plane pitch sensitive stab 25% wing area instead usual 20-21% seemed right direction go help effectiveness stab raised 1 above thrust line long planform helps put some outside propwash Ever since Orion Taurus diamond section stab has way fly help reduce drag sharp LE again used Movable stab 25% total also meets current trends Now rudder previous bird kit t 9% 22 Model Aviation wing area Actually whole tail LE stab back acts like rudder dont forget include area figuring Anyway 9% rudder wig gles once increased 12% eliminate sensitivity around neutral tried diamond airfoil rudder Know what works least doesnt hurt thanks Jim Martin idea triangular rudder Besides looking sharp makes area very easy calculate movable por tion non-critical plenty rudder needed knife-edge spin forth About 40% vertical area seemed good thing remember however closer can get distribution about thrust line less October1975 23 picture worth thousand words au thor installed innards capacious cabin Close-up coclcpit designer also avoided turbulence-creating glued-on canopy Niris rudder will impart roll component Also further away TE hinge effect square inch has Niriss rudder does give bit roll either level flight knife edge An other item will contribute roll rudder shape wing tips seems upswept tip will make rudder command roll plane Look H-Rays tips sometime So sure sand tips symmetrical So far have wing rudder stab What about rest body Important thing insure radio tank retracts etc would fit drew first Next since body side acts like wing during knifeedge flight area proportions should 25% ahead CG 75% behind meant lot area up front Niris has tendency look like dolphin total side area about 200 sq flies well four-point rolls chose 4 wide again room radio compart ment keep engines carburetor line fuel tank engine tilted 45 degrees rather horizontal Dont forget add about e lead left wing tip compensate engine being off center actual structural details easy just followed modelers nose about strength needed Try get light weight wood especially block Besides being lighter up 6 oz block alone much easier sand exception stab use built-up configuration sure use stiff 1/16 sheet skinning use soft wood first first full bore split S actually ended up being split stab top sheet started vibrate like drum head cracked rebuilt stab stiff quarter-grain wood 200 flights later still fine foam stab would work also building wing put LE TE sand shown plans sheet wing using epoxy tach sheet LE TE Use 6-32 screw soldering pencil cut channel aileron torque rod An easy set bearings can made fol lows Grease Vaseline ends continued page 78 24 Model Aviation Finished 60-powered aircraft makes pretty pic ture see familiar features its because designer studied other ships Niris continued measure pin ribs place Once ribs LE place can removed sheeting can applied Notice top rudder nar rower bottom insures smooth line high point air foil TE Speaking taper dont afraid use sandpaper mov able rudder just cut t Again choose light wood sands easy short word about control surface hing ing means try get little gap possible adds drag reduces ef fectiveness surface air gap best way know make front surface V shaped its corresponding fixed surface flat shown plans hinge pin should cen tered apex V re quires inset bit both sides hinge couple cuts Acto knife job done Bolt wing set level glue stab rudder filler block checking alignment go goof means bad bird take time engine cowling easy too Bolt engine slip F-l over crankshaft put prop spinner tape F- 1 back prop witti scrap 1/32 ply spacer Fill scrap sheet blocks using 5-minute epoxy Dont afraid put too much wood because after its dry can just take out engine go razor plane sanding blocks After fuelproof engine tank com partments should ready apply favorite finish tried Silk-Spun Coverite plane followed two coats Acrylic Laquer primer wet-sanded #400 wet/dry paper Fill dings auto body putty dust another coat primer Spray whole plane white mask off color Three coats clear acrylic sand #600 paper wet buff nice gloss Oh yes about fillets Either Epoxilite Micro Balloons epoxy will work fine Put after Coverite before primer Sand smooth paint nice touch personalize plane dry-transfer lettering should put after color before clear Just clean area rub spray clear over Dust couple light clear coats before laying paint heavy however letters may just float paint get out line everything checks out CG no warps etc bolt engine radio gear have fun flying CG 1 forward Niris very difficult spin landings can slowed down practically nothing fear tip stall too Ive tried fact think youll find N iris real pussycat sticks goes point very ca pable doing anything can limitation will Lo mecevak unless CG moved 1-1 Y2 rearward shown plans Dont try unless know though because can both exciting watch fun kids like pick up pieces broken airplane maneuverable also skit terish way proper CG though has absolutely no bad character istics have passed box flyer never flew anything gliders before Although slow half throttle thought ailerons made very touchy able fly problems also just loved feel ing doing axial roll 78 Model Aviation -I IF NOT AVAILABLE AT DEALER ORDER DIRECT SEND 25c FOR CATALOG 6917 West 59th Street Chicago Illinois 60638 HSI NGINEERING JIE-R5L-AL E WWII SCALE AIRCRAFT PLANS Send $100 catalogue containing copy Superseale drawing Superscale Box 201 Arlington Texas 76012
Edition: Model Aviation - 1975/10
Page Numbers: 21, 22, 23, 24, 78
DONT BE AFRAID design own plane Its fun Ive always wanted afraid until got courage up last year said Im gonna being aeronautical engineer didnt anything way out few sound principles go really easier thought first step thought go through some other construction articles figure out what needed stability proportions etc very impressed Norm Pages Mach design because its size reasoning large plane easier judges see sounded logical Niris pronounced Near-iss started idea large wing area few side benefits plane size include wind penetration ease landing Thanks Norm wanted large radio compartment cause install radio two left thumbs Plus figured would need extra room first attempt retracts people make neat radio instal lations always make jealous Knowing room meant large cross-sec tion made decide go way fillets other drag-reducing items like painted canopy instead bubble type Also remember reading some higher aspect ratio lower induced drag some such thing Most pattern ships have aspect ratios order 5 6 So increased 6 base wing planform began evolve 14 root section radio compartment 7/2 tips span 66 gave nice 710 sq wing area equal taper wing chosen compromise between straight LE advantage loops effective dihedral advantage swept wing So now have wing planform What about airfoil insure tips would keep flying center begins stall out Ive incorporated built-in stall starters sharp LE near root progresses normal radius tips Also tip section should thicker center Knowing very little about airfoil theory Reynolds ef fect went back stack well-read magazines soon looking U flirjp Walter E DamuckJr Banshee airfoil Its nicest feature aft section flat youll see Know ing curvature over center important lift flow separation didnt alter However ruler quickly lengthened aft section pointed LE give 14 root 15% thick airfoil Voila tip section es sentially unchanged since 7 17% thick Now ailerons little sketching brought up ares 9% Inset style chosen because look pretty plane rolls less hinge line create drag hinge line chosen perpendicular fuselage center line torque rods would hit aft bulkhead eliminating need re lieve piece clearance Putting aileron servo bottom wing also makes much room upstairs radio gear No worry about inter ference fit foam wing large span will have fairly high moment inertia measure difficult start rolling difficult stop once starts means have lead exit roll spin 1/8 turn great advantage cutting through turbulent air Also roll rate tends remain constant cross wind Like everything else design usually ends up bunch compro mises way like fly will de termine way own design will created Now wing designed what about fuselage Starting thrust line wing set 0 degrees incidence w thrust line Ive seen true mid-wing designs hunt neutral feel due prop blast switching top wing bottom change roll too much will stop hunting Being ignorant centers pressure lift vectors yet knowing nose tail moments very important again returned other designs advice See easy design using proven ideas Using average chord length unit measure designs have prop 1 times average chord ahead CG elevator hinge line three times average chord behind CG changed slightly shortened tail moment 28 because proOctober1975 21 Niris posed incluson snap maneu vers pattern started out draw ing nose moment mentioned noticed retracts would tight fit So nose lengthened accommodate gear side benefit combination virtually impossible make tailbeavy plane way believe try next item consider stab Since short tail will make plane pitch sensitive stab 25% wing area instead usual 20-21% seemed right direction go help effectiveness stab raised 1 above thrust line long planform helps put some outside propwash Ever since Orion Taurus diamond section stab has way fly help reduce drag sharp LE again used Movable stab 25% total also meets current trends Now rudder previous bird kit t 9% 22 Model Aviation wing area Actually whole tail LE stab back acts like rudder dont forget include area figuring Anyway 9% rudder wig gles once increased 12% eliminate sensitivity around neutral tried diamond airfoil rudder Know what works least doesnt hurt thanks Jim Martin idea triangular rudder Besides looking sharp makes area very easy calculate movable por tion non-critical plenty rudder needed knife-edge spin forth About 40% vertical area seemed good thing remember however closer can get distribution about thrust line less October1975 23 picture worth thousand words au thor installed innards capacious cabin Close-up coclcpit designer also avoided turbulence-creating glued-on canopy Niris rudder will impart roll component Also further away TE hinge effect square inch has Niriss rudder does give bit roll either level flight knife edge An other item will contribute roll rudder shape wing tips seems upswept tip will make rudder command roll plane Look H-Rays tips sometime So sure sand tips symmetrical So far have wing rudder stab What about rest body Important thing insure radio tank retracts etc would fit drew first Next since body side acts like wing during knifeedge flight area proportions should 25% ahead CG 75% behind meant lot area up front Niris has tendency look like dolphin total side area about 200 sq flies well four-point rolls chose 4 wide again room radio compart ment keep engines carburetor line fuel tank engine tilted 45 degrees rather horizontal Dont forget add about e lead left wing tip compensate engine being off center actual structural details easy just followed modelers nose about strength needed Try get light weight wood especially block Besides being lighter up 6 oz block alone much easier sand exception stab use built-up configuration sure use stiff 1/16 sheet skinning use soft wood first first full bore split S actually ended up being split stab top sheet started vibrate like drum head cracked rebuilt stab stiff quarter-grain wood 200 flights later still fine foam stab would work also building wing put LE TE sand shown plans sheet wing using epoxy tach sheet LE TE Use 6-32 screw soldering pencil cut channel aileron torque rod An easy set bearings can made fol lows Grease Vaseline ends continued page 78 24 Model Aviation Finished 60-powered aircraft makes pretty pic ture see familiar features its because designer studied other ships Niris continued measure pin ribs place Once ribs LE place can removed sheeting can applied Notice top rudder nar rower bottom insures smooth line high point air foil TE Speaking taper dont afraid use sandpaper mov able rudder just cut t Again choose light wood sands easy short word about control surface hing ing means try get little gap possible adds drag reduces ef fectiveness surface air gap best way know make front surface V shaped its corresponding fixed surface flat shown plans hinge pin should cen tered apex V re quires inset bit both sides hinge couple cuts Acto knife job done Bolt wing set level glue stab rudder filler block checking alignment go goof means bad bird take time engine cowling easy too Bolt engine slip F-l over crankshaft put prop spinner tape F- 1 back prop witti scrap 1/32 ply spacer Fill scrap sheet blocks using 5-minute epoxy Dont afraid put too much wood because after its dry can just take out engine go razor plane sanding blocks After fuelproof engine tank com partments should ready apply favorite finish tried Silk-Spun Coverite plane followed two coats Acrylic Laquer primer wet-sanded #400 wet/dry paper Fill dings auto body putty dust another coat primer Spray whole plane white mask off color Three coats clear acrylic sand #600 paper wet buff nice gloss Oh yes about fillets Either Epoxilite Micro Balloons epoxy will work fine Put after Coverite before primer Sand smooth paint nice touch personalize plane dry-transfer lettering should put after color before clear Just clean area rub spray clear over Dust couple light clear coats before laying paint heavy however letters may just float paint get out line everything checks out CG no warps etc bolt engine radio gear have fun flying CG 1 forward Niris very difficult spin landings can slowed down practically nothing fear tip stall too Ive tried fact think youll find N iris real pussycat sticks goes point very ca pable doing anything can limitation will Lo mecevak unless CG moved 1-1 Y2 rearward shown plans Dont try unless know though because can both exciting watch fun kids like pick up pieces broken airplane maneuverable also skit terish way proper CG though has absolutely no bad character istics have passed box flyer never flew anything gliders before Although slow half throttle thought ailerons made very touchy able fly problems also just loved feel ing doing axial roll 78 Model Aviation -I IF NOT AVAILABLE AT DEALER ORDER DIRECT SEND 25c FOR CATALOG 6917 West 59th Street Chicago Illinois 60638 HSI NGINEERING JIE-R5L-AL E WWII SCALE AIRCRAFT PLANS Send $100 catalogue containing copy Superseale drawing Superscale Box 201 Arlington Texas 76012
Edition: Model Aviation - 1975/10
Page Numbers: 21, 22, 23, 24, 78
DONT BE AFRAID design own plane Its fun Ive always wanted afraid until got courage up last year said Im gonna being aeronautical engineer didnt anything way out few sound principles go really easier thought first step thought go through some other construction articles figure out what needed stability proportions etc very impressed Norm Pages Mach design because its size reasoning large plane easier judges see sounded logical Niris pronounced Near-iss started idea large wing area few side benefits plane size include wind penetration ease landing Thanks Norm wanted large radio compartment cause install radio two left thumbs Plus figured would need extra room first attempt retracts people make neat radio instal lations always make jealous Knowing room meant large cross-sec tion made decide go way fillets other drag-reducing items like painted canopy instead bubble type Also remember reading some higher aspect ratio lower induced drag some such thing Most pattern ships have aspect ratios order 5 6 So increased 6 base wing planform began evolve 14 root section radio compartment 7/2 tips span 66 gave nice 710 sq wing area equal taper wing chosen compromise between straight LE advantage loops effective dihedral advantage swept wing So now have wing planform What about airfoil insure tips would keep flying center begins stall out Ive incorporated built-in stall starters sharp LE near root progresses normal radius tips Also tip section should thicker center Knowing very little about airfoil theory Reynolds ef fect went back stack well-read magazines soon looking U flirjp Walter E DamuckJr Banshee airfoil Its nicest feature aft section flat youll see Know ing curvature over center important lift flow separation didnt alter However ruler quickly lengthened aft section pointed LE give 14 root 15% thick airfoil Voila tip section es sentially unchanged since 7 17% thick Now ailerons little sketching brought up ares 9% Inset style chosen because look pretty plane rolls less hinge line create drag hinge line chosen perpendicular fuselage center line torque rods would hit aft bulkhead eliminating need re lieve piece clearance Putting aileron servo bottom wing also makes much room upstairs radio gear No worry about inter ference fit foam wing large span will have fairly high moment inertia measure difficult start rolling difficult stop once starts means have lead exit roll spin 1/8 turn great advantage cutting through turbulent air Also roll rate tends remain constant cross wind Like everything else design usually ends up bunch compro mises way like fly will de termine way own design will created Now wing designed what about fuselage Starting thrust line wing set 0 degrees incidence w thrust line Ive seen true mid-wing designs hunt neutral feel due prop blast switching top wing bottom change roll too much will stop hunting Being ignorant centers pressure lift vectors yet knowing nose tail moments very important again returned other designs advice See easy design using proven ideas Using average chord length unit measure designs have prop 1 times average chord ahead CG elevator hinge line three times average chord behind CG changed slightly shortened tail moment 28 because proOctober1975 21 Niris posed incluson snap maneu vers pattern started out draw ing nose moment mentioned noticed retracts would tight fit So nose lengthened accommodate gear side benefit combination virtually impossible make tailbeavy plane way believe try next item consider stab Since short tail will make plane pitch sensitive stab 25% wing area instead usual 20-21% seemed right direction go help effectiveness stab raised 1 above thrust line long planform helps put some outside propwash Ever since Orion Taurus diamond section stab has way fly help reduce drag sharp LE again used Movable stab 25% total also meets current trends Now rudder previous bird kit t 9% 22 Model Aviation wing area Actually whole tail LE stab back acts like rudder dont forget include area figuring Anyway 9% rudder wig gles once increased 12% eliminate sensitivity around neutral tried diamond airfoil rudder Know what works least doesnt hurt thanks Jim Martin idea triangular rudder Besides looking sharp makes area very easy calculate movable por tion non-critical plenty rudder needed knife-edge spin forth About 40% vertical area seemed good thing remember however closer can get distribution about thrust line less October1975 23 picture worth thousand words au thor installed innards capacious cabin Close-up coclcpit designer also avoided turbulence-creating glued-on canopy Niris rudder will impart roll component Also further away TE hinge effect square inch has Niriss rudder does give bit roll either level flight knife edge An other item will contribute roll rudder shape wing tips seems upswept tip will make rudder command roll plane Look H-Rays tips sometime So sure sand tips symmetrical So far have wing rudder stab What about rest body Important thing insure radio tank retracts etc would fit drew first Next since body side acts like wing during knifeedge flight area proportions should 25% ahead CG 75% behind meant lot area up front Niris has tendency look like dolphin total side area about 200 sq flies well four-point rolls chose 4 wide again room radio compart ment keep engines carburetor line fuel tank engine tilted 45 degrees rather horizontal Dont forget add about e lead left wing tip compensate engine being off center actual structural details easy just followed modelers nose about strength needed Try get light weight wood especially block Besides being lighter up 6 oz block alone much easier sand exception stab use built-up configuration sure use stiff 1/16 sheet skinning use soft wood first first full bore split S actually ended up being split stab top sheet started vibrate like drum head cracked rebuilt stab stiff quarter-grain wood 200 flights later still fine foam stab would work also building wing put LE TE sand shown plans sheet wing using epoxy tach sheet LE TE Use 6-32 screw soldering pencil cut channel aileron torque rod An easy set bearings can made fol lows Grease Vaseline ends continued page 78 24 Model Aviation Finished 60-powered aircraft makes pretty pic ture see familiar features its because designer studied other ships Niris continued measure pin ribs place Once ribs LE place can removed sheeting can applied Notice top rudder nar rower bottom insures smooth line high point air foil TE Speaking taper dont afraid use sandpaper mov able rudder just cut t Again choose light wood sands easy short word about control surface hing ing means try get little gap possible adds drag reduces ef fectiveness surface air gap best way know make front surface V shaped its corresponding fixed surface flat shown plans hinge pin should cen tered apex V re quires inset bit both sides hinge couple cuts Acto knife job done Bolt wing set level glue stab rudder filler block checking alignment go goof means bad bird take time engine cowling easy too Bolt engine slip F-l over crankshaft put prop spinner tape F- 1 back prop witti scrap 1/32 ply spacer Fill scrap sheet blocks using 5-minute epoxy Dont afraid put too much wood because after its dry can just take out engine go razor plane sanding blocks After fuelproof engine tank com partments should ready apply favorite finish tried Silk-Spun Coverite plane followed two coats Acrylic Laquer primer wet-sanded #400 wet/dry paper Fill dings auto body putty dust another coat primer Spray whole plane white mask off color Three coats clear acrylic sand #600 paper wet buff nice gloss Oh yes about fillets Either Epoxilite Micro Balloons epoxy will work fine Put after Coverite before primer Sand smooth paint nice touch personalize plane dry-transfer lettering should put after color before clear Just clean area rub spray clear over Dust couple light clear coats before laying paint heavy however letters may just float paint get out line everything checks out CG no warps etc bolt engine radio gear have fun flying CG 1 forward Niris very difficult spin landings can slowed down practically nothing fear tip stall too Ive tried fact think youll find N iris real pussycat sticks goes point very ca pable doing anything can limitation will Lo mecevak unless CG moved 1-1 Y2 rearward shown plans Dont try unless know though because can both exciting watch fun kids like pick up pieces broken airplane maneuverable also skit terish way proper CG though has absolutely no bad character istics have passed box flyer never flew anything gliders before Although slow half throttle thought ailerons made very touchy able fly problems also just loved feel ing doing axial roll 78 Model Aviation -I IF NOT AVAILABLE AT DEALER ORDER DIRECT SEND 25c FOR CATALOG 6917 West 59th Street Chicago Illinois 60638 HSI NGINEERING JIE-R5L-AL E WWII SCALE AIRCRAFT PLANS Send $100 catalogue containing copy Superseale drawing Superscale Box 201 Arlington Texas 76012