Coronet 150

NO OCR TEXT NO OCR TEXT simplest construction designs really isnt directed absolute novice scratch-builder can handle its relative complexity youll compensated absolutely incredible slow-speed flight characteristics fin ished model During photo sessions attempted touch-and-go dead low throt tle light headwind brought model down very slowly placed three-point setdown Amazingly wheels didnt rotate allthe Coronet just lit perched gently bird Now slow three-point Old-Timer buff hankers after something really unusual contest de sign sport flier whos interested near-STOL handling Coronet 150 couldnt better choice Construction Wood sizes have care fully selected represent close min imum structural integrity sure se lect light firm C-grain sheeting un blemished stripwood neither cyanoacrylate CyA nor Left Early stages wing construction Note top front spar tapers down wingtip outboard rib slanted poly hedral joint Right Firewall moved back allow extra length four-stroke engine Theres plenty room radio system 26 Model Aviation Above Based trim scheme used original Scientific kit ads version comes out very attractive done up white transparent green MonoKote Text has Beiow Combining stubby wing long thick fuselage rounded empennage produ ces classic design original version enduringly popular part Scientifics line NO OCR TEXT epoxy specified aliphatic resin should used adhesive Use five-minute ep oxy wherever epoxy specified parts should cut out drilled prekitted prior actual assembly Former wing patterns can developed either using carbon paper under plans photocopying Use 3M Sprayment ad patterns wood cut out part peel off paper Positioning firewall holes blind nuts will differ de pending upon engine used Wing Stack cut ribs sandwiches balsa sheet Notch trailing edge re verse blade jigsaw better vi sion pin flat over plans Block up bottom spars balsa scraps care fully place ribs over spars tach CyA Cut wing tips following outline plan place over drawings adhere CyA Shim slightly second spar add ribs Attach leading edge using CyA Remove lead ing edge surface contour outline shown plan Add sheeting using thick CyA working lead ing edge spar spray dilute am monia helpful bending sheet Complete wing adding triangu lar gussets cap strips gled ribs dihedral joints serve cut ting guide trimming spar ends razor saw Sand ribs proper bevel blocking up opposite end prescribed height using flat table edge sanding guide No dihedral gussets required f epoxy used rib faces assembling wing should left uncovered until has aligned fuselage DIHEDRALV4SS BALSA U K SHAPE TO BOUND EDOEv BREAK/ -7-lb PIA SADDLE LAMR4ATE CYA DiiSIA WATER 3A6 BALSA WING SADDLEHA WOO WNG SADDLE V5 BALSA SHEET COWL ill 5FThLZX 335 SHIM ROT SPARLW-I V4SIDM BALSA CAP ST BR S 3/3D SHIM KN 7\ -Th t-~ 1W *1 BA LUS E STOCK ALSAI TOP VIEW U1Ii~ -e---j17 BOTTOM VII DRAINI/BDIA- RRDARED 155 WINO MCRJNY SET HOLEDOWEL FUEL TANK V4SO BA OSFS-40TO WilTLONSERO FOUR CYCLEVLBA PLY ENGINE SHOWNI SAM LEGAL WITH/WINDOW FRAME 30 TWO CYCLE HASVA BALSA LTPIN GOSSET SERVO SAL R WINDO JIUS D7I FRAME 3/32 I/A ______DISOONALS RAVES AL-HO__BATTERY'RECEIVERN MOTOR MOUNTbiT7Tt7 ISBWSA SHEET FUSELAGE SIDE VIEW F-SF-SF-K TWO SHEETS3/IKVABALOAI/K BALSA SFEET /HSO BALS VS BALSABALSASTRINGER SHEETING LL I/B MOSIC WISEMODEL AVIATIONA7 4A7Z77 LANDINS SESAhIfl -A CORONET DOIS WHEELS OLD TIMER 150% SCIENTIFIC CORONET- ENLARGED AND CONVERTED TO R/C ASSIST BY DR n B MATHEWS WING SPAN 72 CHORD II-II2 WING AREA 770 SO IN HT 52 02DABF-S THBU F-K TRACING BY JOE DEMARCOHPLYI/B BALSA SHEET Empennage Make laminated rudder outline strips balsa soaked ammo nia water coated aliphatic resin Merely pin outline over drawing bend treated wood around pins stab/elevator frame fashioned same manner wing tips pinned over plans prototype leading edge laminated like rudder built completely flat using blanks balsa ribs stripwood spars course individual ribs contoured spars may used instead Its simpler though equally effective use square balsa blanks ribs spars sand appropriate shape using large sanding block fitted 100-grit paper Trial fit hinge sections align control horn before final assembly youre satisfied everything fits alignment add filler sheeting sub-fin takes beating takeoffs landings light ply structure capped balsa prototype has held up well Slotted fit between crossmember fuselage fits scrap balsa slot everything can precov ered before final assembly tail details shown will helpful visualizing parts together Note location wire elevator joiner specifics built-up construction techniques 28 Model Aviation Full-Size Plans Available. See Page 180 DIHEDRAL BREAK 717I/H BALSA SHEET 1r t-v ~4L __ -i--m -4-WING TIP __-JV-11rn911KN -ftz~ 3/32 VERT GRAIN BALSA WEBS VIEW I/H SO BALSA SPARS TOP & BOTTOM I/H 1/2 BALSA SPAR BOTTOM OBLO 3/A BALSA AR BALSA SPARS I/H BALSASHEET NOTE ALL WINS RIBS ARE 3/32 C GRAIN BALSA w-I-BARE 14 HAL-3/IA DIA HOLE BE FL ECTISNO ALGAGI/4 BASSWOODIRBALSA SHEET3/IA I/ORAStER LEFT B RIGHT3/IA SHARE TO MATCHBALSAELEVATOR UP N DOWNPLYWOOD OSTE STOCK .i7GRABBER HISSEI/H 3/IAI/O/H 3/A 1/2LOCATIONBALSA I/HOG BALSAHALSALE CROSS PIECES DIHEDRAL DETAIL NO SCALEI 3/1ABALSASBEET LAMINATIONS OF TO STAB FLOOR/ FINRUDDERAlA 3/A BALSA 1/4 50_____ BALSA3/A BALSAI IGIG MED HORN SHEET /3/A BALSA SHEET I/IA I/A ________ ___ ___L XzBALSA___ L4 BALSA_______ SHEET I____ DIJBRO ISO WINS MOUNT B BOLT SO SW1/4 BASHI/A LT PLY DOD UNDER PLYSETS OP INTO FRAME IN FUSELISHTENINS HOLES BOTTOM1/A I/H BASSWOOD I/RLT PLY I/HOOLEASING EDGE IS 4 LABIINATANS BALSAOF AK 1/4 BALSA 3/321/0 BALSA RIBS BLOCK SAND TO SI-lOPE__________________ I/B LT pyEACRIG20DIA MOSIC WIRE SHEET JIG-2LANDING GEAR_____________________ A-I/O Ii SG SAG AD W 2 W-3 MAKE W-4 I/IA BALSA SHEET TOP N BOTTOM 3/IA BALSA SHEET NOTE SAWN DIRECTION 3AABALSA1/HBALSA SHEET RIBSPAR SEE DETAIL STABILIZER SPARS PARALLEL HINGE LINE BOTTOM OF SPAR STAR HINGE DETAIL 0I23 45 Fuselage Make two identical sides lay top other using scraps masking tape prevent sticking Remove two sides pop apart ta ble knife Align fuselage side flat building board assemble frames using CyA Use carpenters square 900 triangles keep frames right angles planes Pull tail post together measure ensure its raised off building board exactly half width fuselage Again use 900 triangle check abso lute squareness directions Secure tem porarily clothespins CyA tail post halves together Cut out crossmem bers over top view add pairs Once everything has set up cured remove box add details Fabricate wing saddle unit two sheets balsa have moistened ammonia pushed against wing bottom coated thick CyA opposite side hold shape Install rear wing hold-down close dead center possible front dowel should run parallel centerline slightly downward toward rear Epoxy place fit wing Drill hole through hardwood trailing edge wings center section Secure grabber against spar faces clamp two insert bolt through hole trial mount wing onto fuse lage Carefully measure distance wing tip wing tip relative fuselage tail post center line Some helpful hints Use string held post pin mark tip end Continue adjust po Docs Coronet mixture both old new construction techniques Balsa strips soaked diluted ammonia formed around pins Sub-fin must hard balsa sition grabber dowel until wing absolutely square relative fu selage Attach grabber epoxy An optional wing mounting method uses 3A6-in-dia dowels rubberbands dowel positions obvious dont re quire further explanation approach may advisable less experienced flier might occasionally put rough landing Trial install mount engine notice hole must drilled engine mount proper placement throffle cable Cut two sections bass other hardwood tight fit inside light ply servo rails temporarily seat servos Position receiver battery pack far forward possible Trial fit plumb metal tank its light ply floor Move servos about obtain slightly nose-heavy balance point compensate covering servos prototype placed pretty well rear rather firm stock used nose cheeks compensation Make pushrods using either 14 x A-in fum balsa nylon rods proto type used solder clevis elevator conOctober 1988 29 OTER SECTION BOTTOM I/A BALSA SHEET TOP ONLY SEE TEST -3/32 PLY BRACE IA PLY GRABBER AHEL ThBRATE -U OLSA ro WING PLAN LOCATIONS TOP 3/3D BALSAT RIBS om Aviation Prints 7 Custom made photo prints several recent Model Buildet COVER PAINTINGS Bob Benjamin now available INCLUDING ee o~95ot ts future Model Builder COVER PAINTINGS will also available have something special mind Bob pleased disouss creating new originals custom commission basis coerpiete detals co ordaing priots toquiro aJt orifl8t petoings ceti write Robert Benjamin Aviation Art 1222 26th Ave NE Olympia WA 98506 206 352-2602 trol horn EZ connector servo MonoKete covering chose prototype simplicitys sake alt small assemblies stab filler unit finally fin-rudder assembly precovered before seating hinges well secured inserting section tooth pick through hole hinge attach ing CyA MonoKote slightly roughened 400 steel wool thoroughly cleaned acetone sprayed Poly U paint will much better job ad hering Ive also used Super Poxy success fully way Vinyl tape such Sigs Stripe Rite excellent masking joints use latter trim stripes too sealing edges thin brushed-on coat Skybrite clear Typical light-but-strong old-time construction airplane terribiy difficult build will certainly source great pride ones craftsmanship its completed After covering over window frames cut out MonoKote cut sections clear plastic fit inside plywood Ad Wilhold RC 56 resulted very neat durable window elimi nating mess usually associated Continued page 138 30 Model Aviation THERMAL CHARGER what looking electric sailplane good looks easy build fun fly great perfor mance Thermal Charger fl PRECISION PRODUCTS INC 714 592-5144 510 E Arrow Highway San Dimas CA 91773 Once Dec completed drawings Coronet matter very short time before others began experimenting design new owner Instailed OS Wankel engine Climb awesome Heavy duty tabric weight bags tar Building Covering Transporting & Field Tie-Down Easily filled sand shot up 5 pounds Five 4x6 hags per package Conforms curvaturest95 Complete instructions Add $100 shipping Worlds Most Usetul Sanding Blocks CS 04 58 4&35CS06 47w/34590V w5u35& 90 V Comho package #2 4j5s95 GS 104 105106 13 4 &35 CS 02 CS 53 Add $2 50 fo Shppng 2&55 34&RoundsGS200PKG Comho package #1 ~g595 $2OO GS 1011021031J a3/8 1/25n3141Shipping Add $200 ShippingSquaresGS 300 PIG Six Pack Comho~65 4200 4l~ GS 101-1061 $23 950 Shipping Add $300 Shipping Single GS $5955 long lasting \#.r/V Add $100 Shipping silicon Carbide gritg blocks sides10 Lonij III El i jsju i inusjrnj Engine Covers __ Dust dirt among en gines worst enemies can greatly reduce life prized powerplants So complete modeling acces sories ordering set MODEL lOXno ~theyll protect engines save money Order Yours Today Easily secured model seconds Fuel p roof stretch fabric conforms engine muffler shapes Long life Velcro fasteners Attractive assorted colors Catalog NoSize 11011/2A thru 25 engines 110240 thru 60 engines 110360 thru 120 engines 1104 ras&Up Add $100 shipping pricen $200 $250 $300 $350 Safety/Preston Continued page 22 model did become uncontrollable should flying primary responsibility safety rests pilot meeting organizers insurance companies have seen flying year has quite definitely dangerous un less take steps reduce risks worst will happen just happens two weeks time will off Nats cover RC Scale events Model Aviation Bob Dolly Wischer have covering events years cannot make time will interesting see whether flight safety foremost minds US Scale competition fliers Till next month have safe Coronet/Mathews Continued page 30 other techniques Hying balanced point shown plans deflections set mdi cated Coronet 150 will literally jump off ground full throffleso much recommend gentle applications throttle first few flights Just point nose wind gently advance throttle until shes airborne No control input should needed Climbout purely function amount power appliedthe throt tle steeper climb Likewise faster flies touchier just good old fun-flying leave engine halfthroffle youre heat compe tition its time let rip Coronet 150 remarkably thermal ready tends ride very light lift well Whether power off models combination extremely slow flight speed exceptional stability give definite edge strong lift airplane quite capable beating socks off some streamlined sisters Power stability versatility Coronet 150 can have Reduce power gentle enjoyable sport fly ing pull out stops take advantage highly competitive thermaling abil ity airplane marries best both worlds either way cant lose Fun Fly/Oldenkamp Continued page 35 about smooth riding over wash board least todays closed quiet airconditioned vehicles forgiving yore airplanes ar rived traces dust Shades 52 Indiana us took trek out door site disappointed greeted complex three flying sites separated perhaps mile RC power Sailplanes second signed Free Flight distant given over Old-Timer RC-Assist crowd latter group Society Antique Modelers SAM 51 holding its West Coast Championship Meet con junction fun-fly/convention formal counts Saturday Sunday about 700 vehicles showed up events including motor homes camping onsite Reno Radio Control Club home Hungry Valley fliers hosted RC ac tivities relatively new field features long wide runway vast pit areas shel tered control center excellent frequen 138 Model Aviation Balsa Cutters 00 5 pc Masters Set 1/8 3/16 1/4 5/16 3/8 . $1698 3 pc Builders Set 3/16 1/4 5/16$998 Whether kit builder scratch builder SQUARE CUT Tools will save time Remove stubborn die cuts cut own squares slots Made US quality machined zinc plated steel Order set today See Dealer Cataloger Order dont carry Square cut Tools call us call well pay shipping SQUARE CUT Tools 4073 254-0516 905 N Harbor City Blvd Melbourne FL 32935 Dualr/Ditributor Inquiries Invited

NO OCR TEXT NO OCR TEXT simplest construction designs really isnt directed absolute novice scratch-builder can handle its relative complexity youll compensated absolutely incredible slow-speed flight characteristics fin ished model During photo sessions attempted touch-and-go dead low throt tle light headwind brought model down very slowly placed three-point setdown Amazingly wheels didnt rotate allthe Coronet just lit perched gently bird Now slow three-point Old-Timer buff hankers after something really unusual contest de sign sport flier whos interested near-STOL handling Coronet 150 couldnt better choice Construction Wood sizes have care fully selected represent close min imum structural integrity sure se lect light firm C-grain sheeting un blemished stripwood neither cyanoacrylate CyA nor Left Early stages wing construction Note top front spar tapers down wingtip outboard rib slanted poly hedral joint Right Firewall moved back allow extra length four-stroke engine Theres plenty room radio system 26 Model Aviation Above Based trim scheme used original Scientific kit ads version comes out very attractive done up white transparent green MonoKote Text has Beiow Combining stubby wing long thick fuselage rounded empennage produ ces classic design original version enduringly popular part Scientifics line NO OCR TEXT epoxy specified aliphatic resin should used adhesive Use five-minute ep oxy wherever epoxy specified parts should cut out drilled prekitted prior actual assembly Former wing patterns can developed either using carbon paper under plans photocopying Use 3M Sprayment ad patterns wood cut out part peel off paper Positioning firewall holes blind nuts will differ de pending upon engine used Wing Stack cut ribs sandwiches balsa sheet Notch trailing edge re verse blade jigsaw better vi sion pin flat over plans Block up bottom spars balsa scraps care fully place ribs over spars tach CyA Cut wing tips following outline plan place over drawings adhere CyA Shim slightly second spar add ribs Attach leading edge using CyA Remove lead ing edge surface contour outline shown plan Add sheeting using thick CyA working lead ing edge spar spray dilute am monia helpful bending sheet Complete wing adding triangu lar gussets cap strips gled ribs dihedral joints serve cut ting guide trimming spar ends razor saw Sand ribs proper bevel blocking up opposite end prescribed height using flat table edge sanding guide No dihedral gussets required f epoxy used rib faces assembling wing should left uncovered until has aligned fuselage DIHEDRALV4SS BALSA U K SHAPE TO BOUND EDOEv BREAK/ -7-lb PIA SADDLE LAMR4ATE CYA DiiSIA WATER 3A6 BALSA WING SADDLEHA WOO WNG SADDLE V5 BALSA SHEET COWL ill 5FThLZX 335 SHIM ROT SPARLW-I V4SIDM BALSA CAP ST BR S 3/3D SHIM KN 7\ -Th t-~ 1W *1 BA LUS E STOCK ALSAI TOP VIEW U1Ii~ -e---j17 BOTTOM VII DRAINI/BDIA- RRDARED 155 WINO MCRJNY SET HOLEDOWEL FUEL TANK V4SO BA OSFS-40TO WilTLONSERO FOUR CYCLEVLBA PLY ENGINE SHOWNI SAM LEGAL WITH/WINDOW FRAME 30 TWO CYCLE HASVA BALSA LTPIN GOSSET SERVO SAL R WINDO JIUS D7I FRAME 3/32 I/A ______DISOONALS RAVES AL-HO__BATTERY'RECEIVERN MOTOR MOUNTbiT7Tt7 ISBWSA SHEET FUSELAGE SIDE VIEW F-SF-SF-K TWO SHEETS3/IKVABALOAI/K BALSA SFEET /HSO BALS VS BALSABALSASTRINGER SHEETING LL I/B MOSIC WISEMODEL AVIATIONA7 4A7Z77 LANDINS SESAhIfl -A CORONET DOIS WHEELS OLD TIMER 150% SCIENTIFIC CORONET- ENLARGED AND CONVERTED TO R/C ASSIST BY DR n B MATHEWS WING SPAN 72 CHORD II-II2 WING AREA 770 SO IN HT 52 02DABF-S THBU F-K TRACING BY JOE DEMARCOHPLYI/B BALSA SHEET Empennage Make laminated rudder outline strips balsa soaked ammo nia water coated aliphatic resin Merely pin outline over drawing bend treated wood around pins stab/elevator frame fashioned same manner wing tips pinned over plans prototype leading edge laminated like rudder built completely flat using blanks balsa ribs stripwood spars course individual ribs contoured spars may used instead Its simpler though equally effective use square balsa blanks ribs spars sand appropriate shape using large sanding block fitted 100-grit paper Trial fit hinge sections align control horn before final assembly youre satisfied everything fits alignment add filler sheeting sub-fin takes beating takeoffs landings light ply structure capped balsa prototype has held up well Slotted fit between crossmember fuselage fits scrap balsa slot everything can precov ered before final assembly tail details shown will helpful visualizing parts together Note location wire elevator joiner specifics built-up construction techniques 28 Model Aviation Full-Size Plans Available. See Page 180 DIHEDRAL BREAK 717I/H BALSA SHEET 1r t-v ~4L __ -i--m -4-WING TIP __-JV-11rn911KN -ftz~ 3/32 VERT GRAIN BALSA WEBS VIEW I/H SO BALSA SPARS TOP & BOTTOM I/H 1/2 BALSA SPAR BOTTOM OBLO 3/A BALSA AR BALSA SPARS I/H BALSASHEET NOTE ALL WINS RIBS ARE 3/32 C GRAIN BALSA w-I-BARE 14 HAL-3/IA DIA HOLE BE FL ECTISNO ALGAGI/4 BASSWOODIRBALSA SHEET3/IA I/ORAStER LEFT B RIGHT3/IA SHARE TO MATCHBALSAELEVATOR UP N DOWNPLYWOOD OSTE STOCK .i7GRABBER HISSEI/H 3/IAI/O/H 3/A 1/2LOCATIONBALSA I/HOG BALSAHALSALE CROSS PIECES DIHEDRAL DETAIL NO SCALEI 3/1ABALSASBEET LAMINATIONS OF TO STAB FLOOR/ FINRUDDERAlA 3/A BALSA 1/4 50_____ BALSA3/A BALSAI IGIG MED HORN SHEET /3/A BALSA SHEET I/IA I/A ________ ___ ___L XzBALSA___ L4 BALSA_______ SHEET I____ DIJBRO ISO WINS MOUNT B BOLT SO SW1/4 BASHI/A LT PLY DOD UNDER PLYSETS OP INTO FRAME IN FUSELISHTENINS HOLES BOTTOM1/A I/H BASSWOOD I/RLT PLY I/HOOLEASING EDGE IS 4 LABIINATANS BALSAOF AK 1/4 BALSA 3/321/0 BALSA RIBS BLOCK SAND TO SI-lOPE__________________ I/B LT pyEACRIG20DIA MOSIC WIRE SHEET JIG-2LANDING GEAR_____________________ A-I/O Ii SG SAG AD W 2 W-3 MAKE W-4 I/IA BALSA SHEET TOP N BOTTOM 3/IA BALSA SHEET NOTE SAWN DIRECTION 3AABALSA1/HBALSA SHEET RIBSPAR SEE DETAIL STABILIZER SPARS PARALLEL HINGE LINE BOTTOM OF SPAR STAR HINGE DETAIL 0I23 45 Fuselage Make two identical sides lay top other using scraps masking tape prevent sticking Remove two sides pop apart ta ble knife Align fuselage side flat building board assemble frames using CyA Use carpenters square 900 triangles keep frames right angles planes Pull tail post together measure ensure its raised off building board exactly half width fuselage Again use 900 triangle check abso lute squareness directions Secure tem porarily clothespins CyA tail post halves together Cut out crossmem bers over top view add pairs Once everything has set up cured remove box add details Fabricate wing saddle unit two sheets balsa have moistened ammonia pushed against wing bottom coated thick CyA opposite side hold shape Install rear wing hold-down close dead center possible front dowel should run parallel centerline slightly downward toward rear Epoxy place fit wing Drill hole through hardwood trailing edge wings center section Secure grabber against spar faces clamp two insert bolt through hole trial mount wing onto fuse lage Carefully measure distance wing tip wing tip relative fuselage tail post center line Some helpful hints Use string held post pin mark tip end Continue adjust po Docs Coronet mixture both old new construction techniques Balsa strips soaked diluted ammonia formed around pins Sub-fin must hard balsa sition grabber dowel until wing absolutely square relative fu selage Attach grabber epoxy An optional wing mounting method uses 3A6-in-dia dowels rubberbands dowel positions obvious dont re quire further explanation approach may advisable less experienced flier might occasionally put rough landing Trial install mount engine notice hole must drilled engine mount proper placement throffle cable Cut two sections bass other hardwood tight fit inside light ply servo rails temporarily seat servos Position receiver battery pack far forward possible Trial fit plumb metal tank its light ply floor Move servos about obtain slightly nose-heavy balance point compensate covering servos prototype placed pretty well rear rather firm stock used nose cheeks compensation Make pushrods using either 14 x A-in fum balsa nylon rods proto type used solder clevis elevator conOctober 1988 29 OTER SECTION BOTTOM I/A BALSA SHEET TOP ONLY SEE TEST -3/32 PLY BRACE IA PLY GRABBER AHEL ThBRATE -U OLSA ro WING PLAN LOCATIONS TOP 3/3D BALSAT RIBS om Aviation Prints 7 Custom made photo prints several recent Model Buildet COVER PAINTINGS Bob Benjamin now available INCLUDING ee o~95ot ts future Model Builder COVER PAINTINGS will also available have something special mind Bob pleased disouss creating new originals custom commission basis coerpiete detals co ordaing priots toquiro aJt orifl8t petoings ceti write Robert Benjamin Aviation Art 1222 26th Ave NE Olympia WA 98506 206 352-2602 trol horn EZ connector servo MonoKete covering chose prototype simplicitys sake alt small assemblies stab filler unit finally fin-rudder assembly precovered before seating hinges well secured inserting section tooth pick through hole hinge attach ing CyA MonoKote slightly roughened 400 steel wool thoroughly cleaned acetone sprayed Poly U paint will much better job ad hering Ive also used Super Poxy success fully way Vinyl tape such Sigs Stripe Rite excellent masking joints use latter trim stripes too sealing edges thin brushed-on coat Skybrite clear Typical light-but-strong old-time construction airplane terribiy difficult build will certainly source great pride ones craftsmanship its completed After covering over window frames cut out MonoKote cut sections clear plastic fit inside plywood Ad Wilhold RC 56 resulted very neat durable window elimi nating mess usually associated Continued page 138 30 Model Aviation THERMAL CHARGER what looking electric sailplane good looks easy build fun fly great perfor mance Thermal Charger fl PRECISION PRODUCTS INC 714 592-5144 510 E Arrow Highway San Dimas CA 91773 Once Dec completed drawings Coronet matter very short time before others began experimenting design new owner Instailed OS Wankel engine Climb awesome Heavy duty tabric weight bags tar Building Covering Transporting & Field Tie-Down Easily filled sand shot up 5 pounds Five 4x6 hags per package Conforms curvaturest95 Complete instructions Add $100 shipping Worlds Most Usetul Sanding Blocks CS 04 58 4&35CS06 47w/34590V w5u35& 90 V Comho package #2 4j5s95 GS 104 105106 13 4 &35 CS 02 CS 53 Add $2 50 fo Shppng 2&55 34&RoundsGS200PKG Comho package #1 ~g595 $2OO GS 1011021031J a3/8 1/25n3141Shipping Add $200 ShippingSquaresGS 300 PIG Six Pack Comho~65 4200 4l~ GS 101-1061 $23 950 Shipping Add $300 Shipping Single GS $5955 long lasting \#.r/V Add $100 Shipping silicon Carbide gritg blocks sides10 Lonij III El i jsju i inusjrnj Engine Covers __ Dust dirt among en gines worst enemies can greatly reduce life prized powerplants So complete modeling acces sories ordering set MODEL lOXno ~theyll protect engines save money Order Yours Today Easily secured model seconds Fuel p roof stretch fabric conforms engine muffler shapes Long life Velcro fasteners Attractive assorted colors Catalog NoSize 11011/2A thru 25 engines 110240 thru 60 engines 110360 thru 120 engines 1104 ras&Up Add $100 shipping pricen $200 $250 $300 $350 Safety/Preston Continued page 22 model did become uncontrollable should flying primary responsibility safety rests pilot meeting organizers insurance companies have seen flying year has quite definitely dangerous un less take steps reduce risks worst will happen just happens two weeks time will off Nats cover RC Scale events Model Aviation Bob Dolly Wischer have covering events years cannot make time will interesting see whether flight safety foremost minds US Scale competition fliers Till next month have safe Coronet/Mathews Continued page 30 other techniques Hying balanced point shown plans deflections set mdi cated Coronet 150 will literally jump off ground full throffleso much recommend gentle applications throttle first few flights Just point nose wind gently advance throttle until shes airborne No control input should needed Climbout purely function amount power appliedthe throt tle steeper climb Likewise faster flies touchier just good old fun-flying leave engine halfthroffle youre heat compe tition its time let rip Coronet 150 remarkably thermal ready tends ride very light lift well Whether power off models combination extremely slow flight speed exceptional stability give definite edge strong lift airplane quite capable beating socks off some streamlined sisters Power stability versatility Coronet 150 can have Reduce power gentle enjoyable sport fly ing pull out stops take advantage highly competitive thermaling abil ity airplane marries best both worlds either way cant lose Fun Fly/Oldenkamp Continued page 35 about smooth riding over wash board least todays closed quiet airconditioned vehicles forgiving yore airplanes ar rived traces dust Shades 52 Indiana us took trek out door site disappointed greeted complex three flying sites separated perhaps mile RC power Sailplanes second signed Free Flight distant given over Old-Timer RC-Assist crowd latter group Society Antique Modelers SAM 51 holding its West Coast Championship Meet con junction fun-fly/convention formal counts Saturday Sunday about 700 vehicles showed up events including motor homes camping onsite Reno Radio Control Club home Hungry Valley fliers hosted RC ac tivities relatively new field features long wide runway vast pit areas shel tered control center excellent frequen 138 Model Aviation Balsa Cutters 00 5 pc Masters Set 1/8 3/16 1/4 5/16 3/8 . $1698 3 pc Builders Set 3/16 1/4 5/16$998 Whether kit builder scratch builder SQUARE CUT Tools will save time Remove stubborn die cuts cut own squares slots Made US quality machined zinc plated steel Order set today See Dealer Cataloger Order dont carry Square cut Tools call us call well pay shipping SQUARE CUT Tools 4073 254-0516 905 N Harbor City Blvd Melbourne FL 32935 Dualr/Ditributor Inquiries Invited

NO OCR TEXT NO OCR TEXT simplest construction designs really isnt directed absolute novice scratch-builder can handle its relative complexity youll compensated absolutely incredible slow-speed flight characteristics fin ished model During photo sessions attempted touch-and-go dead low throt tle light headwind brought model down very slowly placed three-point setdown Amazingly wheels didnt rotate allthe Coronet just lit perched gently bird Now slow three-point Old-Timer buff hankers after something really unusual contest de sign sport flier whos interested near-STOL handling Coronet 150 couldnt better choice Construction Wood sizes have care fully selected represent close min imum structural integrity sure se lect light firm C-grain sheeting un blemished stripwood neither cyanoacrylate CyA nor Left Early stages wing construction Note top front spar tapers down wingtip outboard rib slanted poly hedral joint Right Firewall moved back allow extra length four-stroke engine Theres plenty room radio system 26 Model Aviation Above Based trim scheme used original Scientific kit ads version comes out very attractive done up white transparent green MonoKote Text has Beiow Combining stubby wing long thick fuselage rounded empennage produ ces classic design original version enduringly popular part Scientifics line NO OCR TEXT epoxy specified aliphatic resin should used adhesive Use five-minute ep oxy wherever epoxy specified parts should cut out drilled prekitted prior actual assembly Former wing patterns can developed either using carbon paper under plans photocopying Use 3M Sprayment ad patterns wood cut out part peel off paper Positioning firewall holes blind nuts will differ de pending upon engine used Wing Stack cut ribs sandwiches balsa sheet Notch trailing edge re verse blade jigsaw better vi sion pin flat over plans Block up bottom spars balsa scraps care fully place ribs over spars tach CyA Cut wing tips following outline plan place over drawings adhere CyA Shim slightly second spar add ribs Attach leading edge using CyA Remove lead ing edge surface contour outline shown plan Add sheeting using thick CyA working lead ing edge spar spray dilute am monia helpful bending sheet Complete wing adding triangu lar gussets cap strips gled ribs dihedral joints serve cut ting guide trimming spar ends razor saw Sand ribs proper bevel blocking up opposite end prescribed height using flat table edge sanding guide No dihedral gussets required f epoxy used rib faces assembling wing should left uncovered until has aligned fuselage DIHEDRALV4SS BALSA U K SHAPE TO BOUND EDOEv BREAK/ -7-lb PIA SADDLE LAMR4ATE CYA DiiSIA WATER 3A6 BALSA WING SADDLEHA WOO WNG SADDLE V5 BALSA SHEET COWL ill 5FThLZX 335 SHIM ROT SPARLW-I V4SIDM BALSA CAP ST BR S 3/3D SHIM KN 7\ -Th t-~ 1W *1 BA LUS E STOCK ALSAI TOP VIEW U1Ii~ -e---j17 BOTTOM VII DRAINI/BDIA- RRDARED 155 WINO MCRJNY SET HOLEDOWEL FUEL TANK V4SO BA OSFS-40TO WilTLONSERO FOUR CYCLEVLBA PLY ENGINE SHOWNI SAM LEGAL WITH/WINDOW FRAME 30 TWO CYCLE HASVA BALSA LTPIN GOSSET SERVO SAL R WINDO JIUS D7I FRAME 3/32 I/A ______DISOONALS RAVES AL-HO__BATTERY'RECEIVERN MOTOR MOUNTbiT7Tt7 ISBWSA SHEET FUSELAGE SIDE VIEW F-SF-SF-K TWO SHEETS3/IKVABALOAI/K BALSA SFEET /HSO BALS VS BALSABALSASTRINGER SHEETING LL I/B MOSIC WISEMODEL AVIATIONA7 4A7Z77 LANDINS SESAhIfl -A CORONET DOIS WHEELS OLD TIMER 150% SCIENTIFIC CORONET- ENLARGED AND CONVERTED TO R/C ASSIST BY DR n B MATHEWS WING SPAN 72 CHORD II-II2 WING AREA 770 SO IN HT 52 02DABF-S THBU F-K TRACING BY JOE DEMARCOHPLYI/B BALSA SHEET Empennage Make laminated rudder outline strips balsa soaked ammo nia water coated aliphatic resin Merely pin outline over drawing bend treated wood around pins stab/elevator frame fashioned same manner wing tips pinned over plans prototype leading edge laminated like rudder built completely flat using blanks balsa ribs stripwood spars course individual ribs contoured spars may used instead Its simpler though equally effective use square balsa blanks ribs spars sand appropriate shape using large sanding block fitted 100-grit paper Trial fit hinge sections align control horn before final assembly youre satisfied everything fits alignment add filler sheeting sub-fin takes beating takeoffs landings light ply structure capped balsa prototype has held up well Slotted fit between crossmember fuselage fits scrap balsa slot everything can precov ered before final assembly tail details shown will helpful visualizing parts together Note location wire elevator joiner specifics built-up construction techniques 28 Model Aviation Full-Size Plans Available. See Page 180 DIHEDRAL BREAK 717I/H BALSA SHEET 1r t-v ~4L __ -i--m -4-WING TIP __-JV-11rn911KN -ftz~ 3/32 VERT GRAIN BALSA WEBS VIEW I/H SO BALSA SPARS TOP & BOTTOM I/H 1/2 BALSA SPAR BOTTOM OBLO 3/A BALSA AR BALSA SPARS I/H BALSASHEET NOTE ALL WINS RIBS ARE 3/32 C GRAIN BALSA w-I-BARE 14 HAL-3/IA DIA HOLE BE FL ECTISNO ALGAGI/4 BASSWOODIRBALSA SHEET3/IA I/ORAStER LEFT B RIGHT3/IA SHARE TO MATCHBALSAELEVATOR UP N DOWNPLYWOOD OSTE STOCK .i7GRABBER HISSEI/H 3/IAI/O/H 3/A 1/2LOCATIONBALSA I/HOG BALSAHALSALE CROSS PIECES DIHEDRAL DETAIL NO SCALEI 3/1ABALSASBEET LAMINATIONS OF TO STAB FLOOR/ FINRUDDERAlA 3/A BALSA 1/4 50_____ BALSA3/A BALSAI IGIG MED HORN SHEET /3/A BALSA SHEET I/IA I/A ________ ___ ___L XzBALSA___ L4 BALSA_______ SHEET I____ DIJBRO ISO WINS MOUNT B BOLT SO SW1/4 BASHI/A LT PLY DOD UNDER PLYSETS OP INTO FRAME IN FUSELISHTENINS HOLES BOTTOM1/A I/H BASSWOOD I/RLT PLY I/HOOLEASING EDGE IS 4 LABIINATANS BALSAOF AK 1/4 BALSA 3/321/0 BALSA RIBS BLOCK SAND TO SI-lOPE__________________ I/B LT pyEACRIG20DIA MOSIC WIRE SHEET JIG-2LANDING GEAR_____________________ A-I/O Ii SG SAG AD W 2 W-3 MAKE W-4 I/IA BALSA SHEET TOP N BOTTOM 3/IA BALSA SHEET NOTE SAWN DIRECTION 3AABALSA1/HBALSA SHEET RIBSPAR SEE DETAIL STABILIZER SPARS PARALLEL HINGE LINE BOTTOM OF SPAR STAR HINGE DETAIL 0I23 45 Fuselage Make two identical sides lay top other using scraps masking tape prevent sticking Remove two sides pop apart ta ble knife Align fuselage side flat building board assemble frames using CyA Use carpenters square 900 triangles keep frames right angles planes Pull tail post together measure ensure its raised off building board exactly half width fuselage Again use 900 triangle check abso lute squareness directions Secure tem porarily clothespins CyA tail post halves together Cut out crossmem bers over top view add pairs Once everything has set up cured remove box add details Fabricate wing saddle unit two sheets balsa have moistened ammonia pushed against wing bottom coated thick CyA opposite side hold shape Install rear wing hold-down close dead center possible front dowel should run parallel centerline slightly downward toward rear Epoxy place fit wing Drill hole through hardwood trailing edge wings center section Secure grabber against spar faces clamp two insert bolt through hole trial mount wing onto fuse lage Carefully measure distance wing tip wing tip relative fuselage tail post center line Some helpful hints Use string held post pin mark tip end Continue adjust po Docs Coronet mixture both old new construction techniques Balsa strips soaked diluted ammonia formed around pins Sub-fin must hard balsa sition grabber dowel until wing absolutely square relative fu selage Attach grabber epoxy An optional wing mounting method uses 3A6-in-dia dowels rubberbands dowel positions obvious dont re quire further explanation approach may advisable less experienced flier might occasionally put rough landing Trial install mount engine notice hole must drilled engine mount proper placement throffle cable Cut two sections bass other hardwood tight fit inside light ply servo rails temporarily seat servos Position receiver battery pack far forward possible Trial fit plumb metal tank its light ply floor Move servos about obtain slightly nose-heavy balance point compensate covering servos prototype placed pretty well rear rather firm stock used nose cheeks compensation Make pushrods using either 14 x A-in fum balsa nylon rods proto type used solder clevis elevator conOctober 1988 29 OTER SECTION BOTTOM I/A BALSA SHEET TOP ONLY SEE TEST -3/32 PLY BRACE IA PLY GRABBER AHEL ThBRATE -U OLSA ro WING PLAN LOCATIONS TOP 3/3D BALSAT RIBS om Aviation Prints 7 Custom made photo prints several recent Model Buildet COVER PAINTINGS Bob Benjamin now available INCLUDING ee o~95ot ts future Model Builder COVER PAINTINGS will also available have something special mind Bob pleased disouss creating new originals custom commission basis coerpiete detals co ordaing priots toquiro aJt orifl8t petoings ceti write Robert Benjamin Aviation Art 1222 26th Ave NE Olympia WA 98506 206 352-2602 trol horn EZ connector servo MonoKete covering chose prototype simplicitys sake alt small assemblies stab filler unit finally fin-rudder assembly precovered before seating hinges well secured inserting section tooth pick through hole hinge attach ing CyA MonoKote slightly roughened 400 steel wool thoroughly cleaned acetone sprayed Poly U paint will much better job ad hering Ive also used Super Poxy success fully way Vinyl tape such Sigs Stripe Rite excellent masking joints use latter trim stripes too sealing edges thin brushed-on coat Skybrite clear Typical light-but-strong old-time construction airplane terribiy difficult build will certainly source great pride ones craftsmanship its completed After covering over window frames cut out MonoKote cut sections clear plastic fit inside plywood Ad Wilhold RC 56 resulted very neat durable window elimi nating mess usually associated Continued page 138 30 Model Aviation THERMAL CHARGER what looking electric sailplane good looks easy build fun fly great perfor mance Thermal Charger fl PRECISION PRODUCTS INC 714 592-5144 510 E Arrow Highway San Dimas CA 91773 Once Dec completed drawings Coronet matter very short time before others began experimenting design new owner Instailed OS Wankel engine Climb awesome Heavy duty tabric weight bags tar Building Covering Transporting & Field Tie-Down Easily filled sand shot up 5 pounds Five 4x6 hags per package Conforms curvaturest95 Complete instructions Add $100 shipping Worlds Most Usetul Sanding Blocks CS 04 58 4&35CS06 47w/34590V w5u35& 90 V Comho package #2 4j5s95 GS 104 105106 13 4 &35 CS 02 CS 53 Add $2 50 fo Shppng 2&55 34&RoundsGS200PKG Comho package #1 ~g595 $2OO GS 1011021031J a3/8 1/25n3141Shipping Add $200 ShippingSquaresGS 300 PIG Six Pack Comho~65 4200 4l~ GS 101-1061 $23 950 Shipping Add $300 Shipping Single GS $5955 long lasting \#.r/V Add $100 Shipping silicon Carbide gritg blocks sides10 Lonij III El i jsju i inusjrnj Engine Covers __ Dust dirt among en gines worst enemies can greatly reduce life prized powerplants So complete modeling acces sories ordering set MODEL lOXno ~theyll protect engines save money Order Yours Today Easily secured model seconds Fuel p roof stretch fabric conforms engine muffler shapes Long life Velcro fasteners Attractive assorted colors Catalog NoSize 11011/2A thru 25 engines 110240 thru 60 engines 110360 thru 120 engines 1104 ras&Up Add $100 shipping pricen $200 $250 $300 $350 Safety/Preston Continued page 22 model did become uncontrollable should flying primary responsibility safety rests pilot meeting organizers insurance companies have seen flying year has quite definitely dangerous un less take steps reduce risks worst will happen just happens two weeks time will off Nats cover RC Scale events Model Aviation Bob Dolly Wischer have covering events years cannot make time will interesting see whether flight safety foremost minds US Scale competition fliers Till next month have safe Coronet/Mathews Continued page 30 other techniques Hying balanced point shown plans deflections set mdi cated Coronet 150 will literally jump off ground full throffleso much recommend gentle applications throttle first few flights Just point nose wind gently advance throttle until shes airborne No control input should needed Climbout purely function amount power appliedthe throt tle steeper climb Likewise faster flies touchier just good old fun-flying leave engine halfthroffle youre heat compe tition its time let rip Coronet 150 remarkably thermal ready tends ride very light lift well Whether power off models combination extremely slow flight speed exceptional stability give definite edge strong lift airplane quite capable beating socks off some streamlined sisters Power stability versatility Coronet 150 can have Reduce power gentle enjoyable sport fly ing pull out stops take advantage highly competitive thermaling abil ity airplane marries best both worlds either way cant lose Fun Fly/Oldenkamp Continued page 35 about smooth riding over wash board least todays closed quiet airconditioned vehicles forgiving yore airplanes ar rived traces dust Shades 52 Indiana us took trek out door site disappointed greeted complex three flying sites separated perhaps mile RC power Sailplanes second signed Free Flight distant given over Old-Timer RC-Assist crowd latter group Society Antique Modelers SAM 51 holding its West Coast Championship Meet con junction fun-fly/convention formal counts Saturday Sunday about 700 vehicles showed up events including motor homes camping onsite Reno Radio Control Club home Hungry Valley fliers hosted RC ac tivities relatively new field features long wide runway vast pit areas shel tered control center excellent frequen 138 Model Aviation Balsa Cutters 00 5 pc Masters Set 1/8 3/16 1/4 5/16 3/8 . $1698 3 pc Builders Set 3/16 1/4 5/16$998 Whether kit builder scratch builder SQUARE CUT Tools will save time Remove stubborn die cuts cut own squares slots Made US quality machined zinc plated steel Order set today See Dealer Cataloger Order dont carry Square cut Tools call us call well pay shipping SQUARE CUT Tools 4073 254-0516 905 N Harbor City Blvd Melbourne FL 32935 Dualr/Ditributor Inquiries Invited