THIS AIRCRAFT 1922 first relatively successful British post-WW transports simply con verted bomber Seven W8b planes built used during period 1922 1932 Power provided two 350-hp Rolls-Royce Eagle VIII V-12 en gines Span 75 ft gross weight 12000 lb carried 12 14 passengers speed about 104 mph between major cit ies throughout Britain European con tinent model design presented spired Dave Stotts beautiful little rubberpowered W8f three-engine version W8 flew 1982 Construction pretty much same typical stick-and-tissue Rubber model Use lightweight balsa except noted plans Keep model light possible Dont reinforce beef up structure Save heavy RC-grade balsa RC proj ects Make sure structure straight well sanded before covering uncov ered fit wing temporarily fuse lage Line up both wings very carefully fit size interplane struts permanently glue struts place just get snug placements strut fit tings lined up glue rein force strut plug-sockets balsa gussets rib locations Several commercial motor units can used cases least wiring harness will have discarded Rewire system place battery switch charge-plug fuselage nose FE motor Knight Purdham unit can used pretty much although both will have mounted fairly close front nacelle against radiator cause short prop shafts VL MRC units can used though adaptation will required units shown plans used proto type model HiLine Ltd MiniElectric tinkerers kit Fit motor mount/nacelle frame motors attached time Use Am broid equivalent removable model ce I -7K mlnllatlo mote p, Knight & Pldhm 1411100 nIl 1iS4 ply aaba OIl S rota Sod Ito boaop TA ll ad 5 balsa right motor meant /aol prop ade wood actOr OlbOC aaOkao tIm lOSS p151k COIl. stir S - ho sPa oaooom Koala 0 0 PIt ii. iL \do. ooor lop bond pap r&d J~N jj Sbwaoordboll pla 0 labitg heirS balsa 94 Model Aviation Top The Handley Page stable majestic filer Three 150 mAh cells provide consistent flights over 1 mm Above model would difficult Free Flight subject other form power Mini-electric motors trick due small size synchronization ment tack-glue place Drill fit small wood screws pins anchor nacelles struts Make sure motor thrust lines 00 down left nacelle 30 down right nacelle No side thrust needed Drill hole fuselage front brace hollow plastic drink stirrer taches thread motor wires fus elage Hook up parallel wiring harness switch charging jack battery used three Sanyo 270 mAh cells model although three 150 mAh cells would probably adequate save several grams Attach 4-in plastic props check out propulsion system prior covering assure smooth operation proper direc tion prop rotation nacelles may seem little flimsy point fi nal assembly scale M6 dowel braces stif fen motor mounts enormously Covering rmishiflg Disassemble Continued page 173 tzizzzzzz 0atiootBOTTOOI W MRC LI ho mn oil tank SIC ont p 0 dOWnthraat right motor 0 Ott motor a. 0 di. pinto 0032 thttt ttmt tatib typlaaiotratatttahmOnt halo 68 drilt p0 tab 32 lag OUt hrO 100 070 mth 00 ii LiIfI opt omno intl opt0 ft inof 1-7 OFOCE 7 4 ///[/ [/7II/1-/ U --C TinrO WOOS yL 3/02 hont tlCdia mttttl rib otrots 0032 thtt ati othoro tote throad 00010 Ottlotimant points 171 II I1/80 318 dihndri II C 0 U S S 5 0 Cl 0 -U U I0 0 -tE -1 0 tot OUttOOO 1032 0 3032 tAo 3/32 LE part btortOt 000 hornS 0033 ply N 0 tOot 0/32 tO tatottot tram 3032 OhOt OOOtttO logo oo tin tog no. k\IIIqIIIII/ Jtr Li Pt7 E*35537 W*@U WuOb FOR TWIN MINI-ELECTRtC MOTORS SCALE 10 35r SPAN ENGTH AREA540 iNCHES OmolgOOd sd Draon i N /00/// 7 Irrtplrmd Doom 52030 HP WSt Design September 1988 95 span about 30 flying weight 6 oz results being compact mood big enough detail Construction uses traditional stick-and-tissue methods x1w/ /bondtiotor Latt aino 8Otao 0 dOroni ply both tin. otiarat ttflrbtan dOtE bOa otrlpbtg tattintO tonoproOt 00 roiatd thiroddar oatS. 3132 wino bitob togittrttionr priOtitO 00th OttO ooOat/rOdintOtO moot tidomoto VINYLWRITE CUSTOM LETFERING Providing elegant time saving economical finishing touch modelers EZ TO APPLY Our lettering comes pre-spaced & pre-aligned Saves hours cutting & fuss aligning individual letters decals text custom computer cut fuel proof vvinoucnw premium l thin ical horizontal text om lengths olors vinyl 6 typestyles inc Military Block ted upright text high Priced right no minimum charge example can have AMA number 2 high text color $300 H orders processed upon receipt shipped via first class mail VINVLWRITE CUSTOM LETFERING 16043 Tulsa Street Granada Hills CA 91344 818 363-7131 between Noon 6PM pst order C4 res add tax fly cx & sum sin oa. veer no MU 9169 Call write complete info pack & sample ITS FREE Fly VINYLWRITE Custom Lettering model today torn motors tells cant difficult Two custom motor combina tions have found work well Rewind #30 wire 31 gear ratio 6-in Peck-Polymers prop two 100 mAh cells b Rewind #32 wire 61 gear ratio 7-in Peck-Polymers prop three 100 mAh cells latter motor system powers 26-inspan Curtiss OC-2 biplane 150 sq area 4 oz weight flies great three 100 mAh cells routinely provide beau tiful flights 1 2 mm want try hand making couple custom mini-motors dont mind rewinding own new company called HiLine Ltd PO Box 1283 thesda MD 20817 sells tinkerers double mini-motor kit $1295 plus $150 post age contains three Kodak motors case goof up rewind wire two sets gears shafts etc plus rewinding/as sembly instructions HiLine also sells parts kit hand-held field charger de scribed earlier timer $1995 plus $200 shipping Send pre addressed stamped envelope price list items way doubling power minielectric motors course gang two motors single spur gear photos show such dual motor system couples two rewound HiLine motors 61-ratio spur gear Power three 150 mAh cells 8-in Peck prop enough 250 sq model weighing 8 10 ox Total weight illustrated dual motor system 60 grams Dual mo tors course will draw twice power flight battery does single motor Multi-mini-motor systems ideal multi-engined Free Flight Scale models Scale subjects heretofore unthink able Free Flight now no big deal demonstrate point ourselves built flew 42-in-span Do-X few tips typical multi-engine models powered Mini-Electrics wing area multi should scaled up roughly number motors two-cell twin motors try model wing area between 150 240 sq three-cell twin motors go 200 280 sq Wing loading should kept between three five ounces per square foot lower better Prop diameter multis often limited reason lower gear ratio motors usually suitable some cases lower gear ratios found conunercial units will beneficial Thats advantage customizing own mo tors Suitable plastic props multis diameters 4 5 made Kaysun Oldtimer Models carries North Pacific Peck-Polymers Wil liams Brothers course can also make own props scalelike three- four-bladers Rule wiring multimotor motors should wired together Other wise primary advantages multi electrics would lost almost perfect auto matic synchronization Basically can wire multis together parallel series Lets take example Say have twin using two three-cell motors draw ing 2 amperes current illustra tions shows two possible arrangements either case need double battery en ergy single motor system series arrangement would use battery six cells say 70 mAh capacity draw 21/2 amps current parallel arrangement would use three cells 150 mAh capac ity draw five amps current bat tery advantage series setup higher voltage lower losses battery because lower current advan tages parallel setup include easier charging three cells still can use standard field charger second ad vantage parallel wiring will use much reliable robust battery less chance single cell go bad less problem cell balance etc Overall prefer parallel system its simplicity reliability four-motor six-motor airplanes eight 10 12 etc same princi ples apply although options available basic requirement pair up opposite-side motors example out board left outboard right same cells Another drawing illustrates enough various alternatives give idea parallel-wired multis cells used flight battery pack have higher capacity commonly used conventional single-motor MiniElectric Cells 150 270 higher capacity may necessary twins 150 mAh- 270 mAh-capacity cells about correct size Radio Shack sells 150 mAh N size packages two $499 catalog #23-121 Ace RC sells San yo 270 mAh cells $390 SR Batter ies carries high quality cells 150 mAh 300 mAh higher capacity would like give twins try dont mind building two wings Hand ley Page W8b construction article illu strates example new breed Mini-Electric Free Flight Scale models Re member Free Flight Dornier Do-X now practical reality Lets cut balsa Handley Page/SruII Continued page 95 pieces cover lightweight white Japanese tissue Lightly water spray tissue shrinkage dry brush three four thin coats nonshrinking dope such Sig Lite Coat buty rate clear brushing lacquer sure paper wood surfaces sealed spray couple very fine coats silver dope lacquer Theres no need load up thick opaque finish light uniform coverage adequate particular aircraft modeled G-EBBI has somewhat tricky attractive trim dark blue stripe edges fuselage longe rons well outlines vertical fin/rudder assembly marked stripes drafting pen filled thinned blue enamel brushed interior stripes fine brush Doing somewhat tedious looks pretty good Registration letters can masked sprayed onor cut black tissue other fuselage lettering rub-on dry transfers drawn pen ink let tering guide Handley Page logos fin nose inked onto piece silver-doped tissue stuck Continued page 174 September 1988 173 P Off M CATAM double-sided tape Wait until after initial test flights before permanently attaching 6 dowel motor nacelle braces lightly glue Ambroid first adding radiators vacuformed engines will enable make minor thrust adjustments needed easily Lastly carve some foam pilot figures add much rigging control ca bles like flying Make sure surfaces un warped balance point shown plans first test flights should very calm weather over softest sur face can find green grass ideal Test charge flight battery several times get feel long charge needed get 8- 10-sec motor run Since really cant test glide model will use short runs sort things out initially Put tweak about /16 right rud der Charge motor 8- 10-sec run carefully launch model Re move noticeable turn dive stall ten dency rudder elevator surfaces large make small changes time Shoot straight power glide almost level flight no tendency slow down hang props short hops satisfactory gin lengthen charge get five 10 additional seconds power Remember lengthen charge initial power level will increase somewhat time reach 20 30 seconds power should getting very slight initial climb level cruise Keep turns very wide gentle power exhausted model will descend slow steep glide isnt thermal soarer allow model climb nosehigh near stallespecially gusty weather Trim relatively shallow pen etrating climb satisfied short power runs charge up enjoy prettiest Free Flight sights youre ever likely see Dihedral/Beron-Rawdon Continued page 99 will roll 15/10 x 20/30 same roll rate Going plot Figure 4 80-in-span planes find roll rate should about 26 degrees per second Good thing plots agree Figure 5 also contains same informa tion three EDAs function yaw angle NEW IMPROVED * * LIjila WiMit todd wilk wouli Pow *US Pcte,tNx Des ** WANDIT * 2763 * * ies exited * eveamarramiPo1OftCORDJ * * elorOry * ick Abrasives * * Machine gives exceptional * ing control excellent tinixh * * 5 easic mci 1 fiat Wand aed 1 * nisantsp * ulde Specel iint 2 fIat 1 hail* rauma wand 5 xl grits * ehsiie ricxdes3liai2 hail 10uSd xi * gits * ditional Wandx Abraxivex available * *WANDIT MANUFACTURING 214 2885789 PO Box 266 uite Texas 75149 MINIJET SERIESOhs Proud gird thePreiLd Sun Onese planes feature xii balsadesigned meet rxnstructlon Designed ciththe g/7 0SPRA Furmula intccnedlate flyer xindthey clii 120 rulesnhis 1/u accept 2025 sizeenginefuse scale wedel ciii accept rear eahaust engine fur xx 60i20 cl size engines ccptionai perforxanceOet p glass fuselageclth uf tIe thrill jet cithoutoo wing cxnstructixn full kit $15000 ccv hassles nutted fanSkphack Semikit alma axailable Ins cund $02100 Special Introdactocp PricePlease add $1000 shipping handling $4000 plus $300 flu hes Send check Mdadd 5% sales tax Mastercard hisS C0D add $3003001 15lA477 PARRISH AIRCRAFT c SCALE cOAStS Toy Turkyp Fornula lDart Experimental o SW 49lkTer $9100 $5 SIRtigershurkceoplace full size aircraft antalien FIx 33317 Prototypical dihedral arrangements Al though different dihedral schemes same Equivalent Dihedral Angle will roll same rate actual localized flow air over wing will vary considerably sake illustrating behavior less rudder yaw near stall fly speed margin stall rapid maneuvers required Polyhedral Breaking wing up four sections instead two V-dihedral re duces range angle attack variations across wing during steady-state roll illustrated Figure 9 saw tooth line reduces possibility leaving drag bucket during maneuvers can imagine number wing panels increased sawtooth becomes progressively finer until equivalent elliptical wing reached Discussion see above designer rudder-elevator airplane has few options play order control maximum roll rate plane RC Sailplane applications desire achieve high roll ratemore almost al ways better Span airspeed powerful variables usually determined higher prior ity requirements such glide ratio 174 Model Aviation AND PRINTING SERVICE QUICK SERVICE OVER 300 ORDINATE SETS ON FILE SEND 5200 xodS1SEloogeonelopeforsuoooplea tlxs list xf niefuil xx isuod xxxv SEP10 S500 SASE bag fur plot ta chord irogIlo suet oxooples oxooc scvezxl xixfuds lox ocdcc pocfccruccc IncludE pLots copy thc thepe rod die dhta possible SEND $1011 fur doe PLOT SHAPE CATALOG xfcbe 100 plus olotuds loc St ditch plots pius lustsoicxi xoofcol iofnzxoxloon sdsec osefxdl aicfod duos roan/many puges STANDARD PLOTSander Oliorhex ISLE poge Lorge docoda noriloble no coDs cost cssopcopscdoorlox clssod bxogob 20 chord tosice coat sf10 p1st CUSTOM PLOTnEG AVAILABLE Can modifr oanbcx olijobosass mdi pieces Osgather coos slow vanous also thocboocSScs top & bottom ilifrorot TAPERED 1NO PLOTS $1000 Secop pbua 50 roots pci rib oven 10 slightly higher THIS MONThS HOT PLOTS MACA 6100 MACA 0000 Orcut foc stabs EPPLER 102 205 SIOil Oxsd chE cod af Mooch magsoioe issue date Can slow Slid oh no tltdiSlsixnldclooess NO EXIThIL CHARGE Hot plots Osly $100 over 10 $101 THE PTERANOOOH PRESS 0N PODOSS0 OAE ANn CA 0160 0 0 StarBase Exchange 1902 Walnut Montgomery AL 36106 dee. Write free catalog SVNASA patches flight suits pictures astronaut food much VISA/MC 1-800-426-1354
Edition: Model Aviation - 1988/09
Page Numbers: 94, 95, 173, 174
THIS AIRCRAFT 1922 first relatively successful British post-WW transports simply con verted bomber Seven W8b planes built used during period 1922 1932 Power provided two 350-hp Rolls-Royce Eagle VIII V-12 en gines Span 75 ft gross weight 12000 lb carried 12 14 passengers speed about 104 mph between major cit ies throughout Britain European con tinent model design presented spired Dave Stotts beautiful little rubberpowered W8f three-engine version W8 flew 1982 Construction pretty much same typical stick-and-tissue Rubber model Use lightweight balsa except noted plans Keep model light possible Dont reinforce beef up structure Save heavy RC-grade balsa RC proj ects Make sure structure straight well sanded before covering uncov ered fit wing temporarily fuse lage Line up both wings very carefully fit size interplane struts permanently glue struts place just get snug placements strut fit tings lined up glue rein force strut plug-sockets balsa gussets rib locations Several commercial motor units can used cases least wiring harness will have discarded Rewire system place battery switch charge-plug fuselage nose FE motor Knight Purdham unit can used pretty much although both will have mounted fairly close front nacelle against radiator cause short prop shafts VL MRC units can used though adaptation will required units shown plans used proto type model HiLine Ltd MiniElectric tinkerers kit Fit motor mount/nacelle frame motors attached time Use Am broid equivalent removable model ce I -7K mlnllatlo mote p, Knight & Pldhm 1411100 nIl 1iS4 ply aaba OIl S rota Sod Ito boaop TA ll ad 5 balsa right motor meant /aol prop ade wood actOr OlbOC aaOkao tIm lOSS p151k COIl. stir S - ho sPa oaooom Koala 0 0 PIt ii. iL \do. ooor lop bond pap r&d J~N jj Sbwaoordboll pla 0 labitg heirS balsa 94 Model Aviation Top The Handley Page stable majestic filer Three 150 mAh cells provide consistent flights over 1 mm Above model would difficult Free Flight subject other form power Mini-electric motors trick due small size synchronization ment tack-glue place Drill fit small wood screws pins anchor nacelles struts Make sure motor thrust lines 00 down left nacelle 30 down right nacelle No side thrust needed Drill hole fuselage front brace hollow plastic drink stirrer taches thread motor wires fus elage Hook up parallel wiring harness switch charging jack battery used three Sanyo 270 mAh cells model although three 150 mAh cells would probably adequate save several grams Attach 4-in plastic props check out propulsion system prior covering assure smooth operation proper direc tion prop rotation nacelles may seem little flimsy point fi nal assembly scale M6 dowel braces stif fen motor mounts enormously Covering rmishiflg Disassemble Continued page 173 tzizzzzzz 0atiootBOTTOOI W MRC LI ho mn oil tank SIC ont p 0 dOWnthraat right motor 0 Ott motor a. 0 di. pinto 0032 thttt ttmt tatib typlaaiotratatttahmOnt halo 68 drilt p0 tab 32 lag OUt hrO 100 070 mth 00 ii LiIfI opt omno intl opt0 ft inof 1-7 OFOCE 7 4 ///[/ [/7II/1-/ U --C TinrO WOOS yL 3/02 hont tlCdia mttttl rib otrots 0032 thtt ati othoro tote throad 00010 Ottlotimant points 171 II I1/80 318 dihndri II C 0 U S S 5 0 Cl 0 -U U I0 0 -tE -1 0 tot OUttOOO 1032 0 3032 tAo 3/32 LE part btortOt 000 hornS 0033 ply N 0 tOot 0/32 tO tatottot tram 3032 OhOt OOOtttO logo oo tin tog no. k\IIIqIIIII/ Jtr Li Pt7 E*35537 W*@U WuOb FOR TWIN MINI-ELECTRtC MOTORS SCALE 10 35r SPAN ENGTH AREA540 iNCHES OmolgOOd sd Draon i N /00/// 7 Irrtplrmd Doom 52030 HP WSt Design September 1988 95 span about 30 flying weight 6 oz results being compact mood big enough detail Construction uses traditional stick-and-tissue methods x1w/ /bondtiotor Latt aino 8Otao 0 dOroni ply both tin. otiarat ttflrbtan dOtE bOa otrlpbtg tattintO tonoproOt 00 roiatd thiroddar oatS. 3132 wino bitob togittrttionr priOtitO 00th OttO ooOat/rOdintOtO moot tidomoto VINYLWRITE CUSTOM LETFERING Providing elegant time saving economical finishing touch modelers EZ TO APPLY Our lettering comes pre-spaced & pre-aligned Saves hours cutting & fuss aligning individual letters decals text custom computer cut fuel proof vvinoucnw premium l thin ical horizontal text om lengths olors vinyl 6 typestyles inc Military Block ted upright text high Priced right no minimum charge example can have AMA number 2 high text color $300 H orders processed upon receipt shipped via first class mail VINVLWRITE CUSTOM LETFERING 16043 Tulsa Street Granada Hills CA 91344 818 363-7131 between Noon 6PM pst order C4 res add tax fly cx & sum sin oa. veer no MU 9169 Call write complete info pack & sample ITS FREE Fly VINYLWRITE Custom Lettering model today torn motors tells cant difficult Two custom motor combina tions have found work well Rewind #30 wire 31 gear ratio 6-in Peck-Polymers prop two 100 mAh cells b Rewind #32 wire 61 gear ratio 7-in Peck-Polymers prop three 100 mAh cells latter motor system powers 26-inspan Curtiss OC-2 biplane 150 sq area 4 oz weight flies great three 100 mAh cells routinely provide beau tiful flights 1 2 mm want try hand making couple custom mini-motors dont mind rewinding own new company called HiLine Ltd PO Box 1283 thesda MD 20817 sells tinkerers double mini-motor kit $1295 plus $150 post age contains three Kodak motors case goof up rewind wire two sets gears shafts etc plus rewinding/as sembly instructions HiLine also sells parts kit hand-held field charger de scribed earlier timer $1995 plus $200 shipping Send pre addressed stamped envelope price list items way doubling power minielectric motors course gang two motors single spur gear photos show such dual motor system couples two rewound HiLine motors 61-ratio spur gear Power three 150 mAh cells 8-in Peck prop enough 250 sq model weighing 8 10 ox Total weight illustrated dual motor system 60 grams Dual mo tors course will draw twice power flight battery does single motor Multi-mini-motor systems ideal multi-engined Free Flight Scale models Scale subjects heretofore unthink able Free Flight now no big deal demonstrate point ourselves built flew 42-in-span Do-X few tips typical multi-engine models powered Mini-Electrics wing area multi should scaled up roughly number motors two-cell twin motors try model wing area between 150 240 sq three-cell twin motors go 200 280 sq Wing loading should kept between three five ounces per square foot lower better Prop diameter multis often limited reason lower gear ratio motors usually suitable some cases lower gear ratios found conunercial units will beneficial Thats advantage customizing own mo tors Suitable plastic props multis diameters 4 5 made Kaysun Oldtimer Models carries North Pacific Peck-Polymers Wil liams Brothers course can also make own props scalelike three- four-bladers Rule wiring multimotor motors should wired together Other wise primary advantages multi electrics would lost almost perfect auto matic synchronization Basically can wire multis together parallel series Lets take example Say have twin using two three-cell motors draw ing 2 amperes current illustra tions shows two possible arrangements either case need double battery en ergy single motor system series arrangement would use battery six cells say 70 mAh capacity draw 21/2 amps current parallel arrangement would use three cells 150 mAh capac ity draw five amps current bat tery advantage series setup higher voltage lower losses battery because lower current advan tages parallel setup include easier charging three cells still can use standard field charger second ad vantage parallel wiring will use much reliable robust battery less chance single cell go bad less problem cell balance etc Overall prefer parallel system its simplicity reliability four-motor six-motor airplanes eight 10 12 etc same princi ples apply although options available basic requirement pair up opposite-side motors example out board left outboard right same cells Another drawing illustrates enough various alternatives give idea parallel-wired multis cells used flight battery pack have higher capacity commonly used conventional single-motor MiniElectric Cells 150 270 higher capacity may necessary twins 150 mAh- 270 mAh-capacity cells about correct size Radio Shack sells 150 mAh N size packages two $499 catalog #23-121 Ace RC sells San yo 270 mAh cells $390 SR Batter ies carries high quality cells 150 mAh 300 mAh higher capacity would like give twins try dont mind building two wings Hand ley Page W8b construction article illu strates example new breed Mini-Electric Free Flight Scale models Re member Free Flight Dornier Do-X now practical reality Lets cut balsa Handley Page/SruII Continued page 95 pieces cover lightweight white Japanese tissue Lightly water spray tissue shrinkage dry brush three four thin coats nonshrinking dope such Sig Lite Coat buty rate clear brushing lacquer sure paper wood surfaces sealed spray couple very fine coats silver dope lacquer Theres no need load up thick opaque finish light uniform coverage adequate particular aircraft modeled G-EBBI has somewhat tricky attractive trim dark blue stripe edges fuselage longe rons well outlines vertical fin/rudder assembly marked stripes drafting pen filled thinned blue enamel brushed interior stripes fine brush Doing somewhat tedious looks pretty good Registration letters can masked sprayed onor cut black tissue other fuselage lettering rub-on dry transfers drawn pen ink let tering guide Handley Page logos fin nose inked onto piece silver-doped tissue stuck Continued page 174 September 1988 173 P Off M CATAM double-sided tape Wait until after initial test flights before permanently attaching 6 dowel motor nacelle braces lightly glue Ambroid first adding radiators vacuformed engines will enable make minor thrust adjustments needed easily Lastly carve some foam pilot figures add much rigging control ca bles like flying Make sure surfaces un warped balance point shown plans first test flights should very calm weather over softest sur face can find green grass ideal Test charge flight battery several times get feel long charge needed get 8- 10-sec motor run Since really cant test glide model will use short runs sort things out initially Put tweak about /16 right rud der Charge motor 8- 10-sec run carefully launch model Re move noticeable turn dive stall ten dency rudder elevator surfaces large make small changes time Shoot straight power glide almost level flight no tendency slow down hang props short hops satisfactory gin lengthen charge get five 10 additional seconds power Remember lengthen charge initial power level will increase somewhat time reach 20 30 seconds power should getting very slight initial climb level cruise Keep turns very wide gentle power exhausted model will descend slow steep glide isnt thermal soarer allow model climb nosehigh near stallespecially gusty weather Trim relatively shallow pen etrating climb satisfied short power runs charge up enjoy prettiest Free Flight sights youre ever likely see Dihedral/Beron-Rawdon Continued page 99 will roll 15/10 x 20/30 same roll rate Going plot Figure 4 80-in-span planes find roll rate should about 26 degrees per second Good thing plots agree Figure 5 also contains same informa tion three EDAs function yaw angle NEW IMPROVED * * LIjila WiMit todd wilk wouli Pow *US Pcte,tNx Des ** WANDIT * 2763 * * ies exited * eveamarramiPo1OftCORDJ * * elorOry * ick Abrasives * * Machine gives exceptional * ing control excellent tinixh * * 5 easic mci 1 fiat Wand aed 1 * nisantsp * ulde Specel iint 2 fIat 1 hail* rauma wand 5 xl grits * ehsiie ricxdes3liai2 hail 10uSd xi * gits * ditional Wandx Abraxivex available * *WANDIT MANUFACTURING 214 2885789 PO Box 266 uite Texas 75149 MINIJET SERIESOhs Proud gird thePreiLd Sun Onese planes feature xii balsadesigned meet rxnstructlon Designed ciththe g/7 0SPRA Furmula intccnedlate flyer xindthey clii 120 rulesnhis 1/u accept 2025 sizeenginefuse scale wedel ciii accept rear eahaust engine fur xx 60i20 cl size engines ccptionai perforxanceOet p glass fuselageclth uf tIe thrill jet cithoutoo wing cxnstructixn full kit $15000 ccv hassles nutted fanSkphack Semikit alma axailable Ins cund $02100 Special Introdactocp PricePlease add $1000 shipping handling $4000 plus $300 flu hes Send check Mdadd 5% sales tax Mastercard hisS C0D add $3003001 15lA477 PARRISH AIRCRAFT c SCALE cOAStS Toy Turkyp Fornula lDart Experimental o SW 49lkTer $9100 $5 SIRtigershurkceoplace full size aircraft antalien FIx 33317 Prototypical dihedral arrangements Al though different dihedral schemes same Equivalent Dihedral Angle will roll same rate actual localized flow air over wing will vary considerably sake illustrating behavior less rudder yaw near stall fly speed margin stall rapid maneuvers required Polyhedral Breaking wing up four sections instead two V-dihedral re duces range angle attack variations across wing during steady-state roll illustrated Figure 9 saw tooth line reduces possibility leaving drag bucket during maneuvers can imagine number wing panels increased sawtooth becomes progressively finer until equivalent elliptical wing reached Discussion see above designer rudder-elevator airplane has few options play order control maximum roll rate plane RC Sailplane applications desire achieve high roll ratemore almost al ways better Span airspeed powerful variables usually determined higher prior ity requirements such glide ratio 174 Model Aviation AND PRINTING SERVICE QUICK SERVICE OVER 300 ORDINATE SETS ON FILE SEND 5200 xodS1SEloogeonelopeforsuoooplea tlxs list xf niefuil xx isuod xxxv SEP10 S500 SASE bag fur plot ta chord irogIlo suet oxooples oxooc scvezxl xixfuds lox ocdcc pocfccruccc IncludE pLots copy thc thepe rod die dhta possible SEND $1011 fur doe PLOT SHAPE CATALOG xfcbe 100 plus olotuds loc St ditch plots pius lustsoicxi xoofcol iofnzxoxloon sdsec osefxdl aicfod duos roan/many puges STANDARD PLOTSander Oliorhex ISLE poge Lorge docoda noriloble no coDs cost cssopcopscdoorlox clssod bxogob 20 chord tosice coat sf10 p1st CUSTOM PLOTnEG AVAILABLE Can modifr oanbcx olijobosass mdi pieces Osgather coos slow vanous also thocboocSScs top & bottom ilifrorot TAPERED 1NO PLOTS $1000 Secop pbua 50 roots pci rib oven 10 slightly higher THIS MONThS HOT PLOTS MACA 6100 MACA 0000 Orcut foc stabs EPPLER 102 205 SIOil Oxsd chE cod af Mooch magsoioe issue date Can slow Slid oh no tltdiSlsixnldclooess NO EXIThIL CHARGE Hot plots Osly $100 over 10 $101 THE PTERANOOOH PRESS 0N PODOSS0 OAE ANn CA 0160 0 0 StarBase Exchange 1902 Walnut Montgomery AL 36106 dee. Write free catalog SVNASA patches flight suits pictures astronaut food much VISA/MC 1-800-426-1354
Edition: Model Aviation - 1988/09
Page Numbers: 94, 95, 173, 174
THIS AIRCRAFT 1922 first relatively successful British post-WW transports simply con verted bomber Seven W8b planes built used during period 1922 1932 Power provided two 350-hp Rolls-Royce Eagle VIII V-12 en gines Span 75 ft gross weight 12000 lb carried 12 14 passengers speed about 104 mph between major cit ies throughout Britain European con tinent model design presented spired Dave Stotts beautiful little rubberpowered W8f three-engine version W8 flew 1982 Construction pretty much same typical stick-and-tissue Rubber model Use lightweight balsa except noted plans Keep model light possible Dont reinforce beef up structure Save heavy RC-grade balsa RC proj ects Make sure structure straight well sanded before covering uncov ered fit wing temporarily fuse lage Line up both wings very carefully fit size interplane struts permanently glue struts place just get snug placements strut fit tings lined up glue rein force strut plug-sockets balsa gussets rib locations Several commercial motor units can used cases least wiring harness will have discarded Rewire system place battery switch charge-plug fuselage nose FE motor Knight Purdham unit can used pretty much although both will have mounted fairly close front nacelle against radiator cause short prop shafts VL MRC units can used though adaptation will required units shown plans used proto type model HiLine Ltd MiniElectric tinkerers kit Fit motor mount/nacelle frame motors attached time Use Am broid equivalent removable model ce I -7K mlnllatlo mote p, Knight & Pldhm 1411100 nIl 1iS4 ply aaba OIl S rota Sod Ito boaop TA ll ad 5 balsa right motor meant /aol prop ade wood actOr OlbOC aaOkao tIm lOSS p151k COIl. stir S - ho sPa oaooom Koala 0 0 PIt ii. iL \do. ooor lop bond pap r&d J~N jj Sbwaoordboll pla 0 labitg heirS balsa 94 Model Aviation Top The Handley Page stable majestic filer Three 150 mAh cells provide consistent flights over 1 mm Above model would difficult Free Flight subject other form power Mini-electric motors trick due small size synchronization ment tack-glue place Drill fit small wood screws pins anchor nacelles struts Make sure motor thrust lines 00 down left nacelle 30 down right nacelle No side thrust needed Drill hole fuselage front brace hollow plastic drink stirrer taches thread motor wires fus elage Hook up parallel wiring harness switch charging jack battery used three Sanyo 270 mAh cells model although three 150 mAh cells would probably adequate save several grams Attach 4-in plastic props check out propulsion system prior covering assure smooth operation proper direc tion prop rotation nacelles may seem little flimsy point fi nal assembly scale M6 dowel braces stif fen motor mounts enormously Covering rmishiflg Disassemble Continued page 173 tzizzzzzz 0atiootBOTTOOI W MRC LI ho mn oil tank SIC ont p 0 dOWnthraat right motor 0 Ott motor a. 0 di. pinto 0032 thttt ttmt tatib typlaaiotratatttahmOnt halo 68 drilt p0 tab 32 lag OUt hrO 100 070 mth 00 ii LiIfI opt omno intl opt0 ft inof 1-7 OFOCE 7 4 ///[/ [/7II/1-/ U --C TinrO WOOS yL 3/02 hont tlCdia mttttl rib otrots 0032 thtt ati othoro tote throad 00010 Ottlotimant points 171 II I1/80 318 dihndri II C 0 U S S 5 0 Cl 0 -U U I0 0 -tE -1 0 tot OUttOOO 1032 0 3032 tAo 3/32 LE part btortOt 000 hornS 0033 ply N 0 tOot 0/32 tO tatottot tram 3032 OhOt OOOtttO logo oo tin tog no. k\IIIqIIIII/ Jtr Li Pt7 E*35537 W*@U WuOb FOR TWIN MINI-ELECTRtC MOTORS SCALE 10 35r SPAN ENGTH AREA540 iNCHES OmolgOOd sd Draon i N /00/// 7 Irrtplrmd Doom 52030 HP WSt Design September 1988 95 span about 30 flying weight 6 oz results being compact mood big enough detail Construction uses traditional stick-and-tissue methods x1w/ /bondtiotor Latt aino 8Otao 0 dOroni ply both tin. otiarat ttflrbtan dOtE bOa otrlpbtg tattintO tonoproOt 00 roiatd thiroddar oatS. 3132 wino bitob togittrttionr priOtitO 00th OttO ooOat/rOdintOtO moot tidomoto VINYLWRITE CUSTOM LETFERING Providing elegant time saving economical finishing touch modelers EZ TO APPLY Our lettering comes pre-spaced & pre-aligned Saves hours cutting & fuss aligning individual letters decals text custom computer cut fuel proof vvinoucnw premium l thin ical horizontal text om lengths olors vinyl 6 typestyles inc Military Block ted upright text high Priced right no minimum charge example can have AMA number 2 high text color $300 H orders processed upon receipt shipped via first class mail VINVLWRITE CUSTOM LETFERING 16043 Tulsa Street Granada Hills CA 91344 818 363-7131 between Noon 6PM pst order C4 res add tax fly cx & sum sin oa. veer no MU 9169 Call write complete info pack & sample ITS FREE Fly VINYLWRITE Custom Lettering model today torn motors tells cant difficult Two custom motor combina tions have found work well Rewind #30 wire 31 gear ratio 6-in Peck-Polymers prop two 100 mAh cells b Rewind #32 wire 61 gear ratio 7-in Peck-Polymers prop three 100 mAh cells latter motor system powers 26-inspan Curtiss OC-2 biplane 150 sq area 4 oz weight flies great three 100 mAh cells routinely provide beau tiful flights 1 2 mm want try hand making couple custom mini-motors dont mind rewinding own new company called HiLine Ltd PO Box 1283 thesda MD 20817 sells tinkerers double mini-motor kit $1295 plus $150 post age contains three Kodak motors case goof up rewind wire two sets gears shafts etc plus rewinding/as sembly instructions HiLine also sells parts kit hand-held field charger de scribed earlier timer $1995 plus $200 shipping Send pre addressed stamped envelope price list items way doubling power minielectric motors course gang two motors single spur gear photos show such dual motor system couples two rewound HiLine motors 61-ratio spur gear Power three 150 mAh cells 8-in Peck prop enough 250 sq model weighing 8 10 ox Total weight illustrated dual motor system 60 grams Dual mo tors course will draw twice power flight battery does single motor Multi-mini-motor systems ideal multi-engined Free Flight Scale models Scale subjects heretofore unthink able Free Flight now no big deal demonstrate point ourselves built flew 42-in-span Do-X few tips typical multi-engine models powered Mini-Electrics wing area multi should scaled up roughly number motors two-cell twin motors try model wing area between 150 240 sq three-cell twin motors go 200 280 sq Wing loading should kept between three five ounces per square foot lower better Prop diameter multis often limited reason lower gear ratio motors usually suitable some cases lower gear ratios found conunercial units will beneficial Thats advantage customizing own mo tors Suitable plastic props multis diameters 4 5 made Kaysun Oldtimer Models carries North Pacific Peck-Polymers Wil liams Brothers course can also make own props scalelike three- four-bladers Rule wiring multimotor motors should wired together Other wise primary advantages multi electrics would lost almost perfect auto matic synchronization Basically can wire multis together parallel series Lets take example Say have twin using two three-cell motors draw ing 2 amperes current illustra tions shows two possible arrangements either case need double battery en ergy single motor system series arrangement would use battery six cells say 70 mAh capacity draw 21/2 amps current parallel arrangement would use three cells 150 mAh capac ity draw five amps current bat tery advantage series setup higher voltage lower losses battery because lower current advan tages parallel setup include easier charging three cells still can use standard field charger second ad vantage parallel wiring will use much reliable robust battery less chance single cell go bad less problem cell balance etc Overall prefer parallel system its simplicity reliability four-motor six-motor airplanes eight 10 12 etc same princi ples apply although options available basic requirement pair up opposite-side motors example out board left outboard right same cells Another drawing illustrates enough various alternatives give idea parallel-wired multis cells used flight battery pack have higher capacity commonly used conventional single-motor MiniElectric Cells 150 270 higher capacity may necessary twins 150 mAh- 270 mAh-capacity cells about correct size Radio Shack sells 150 mAh N size packages two $499 catalog #23-121 Ace RC sells San yo 270 mAh cells $390 SR Batter ies carries high quality cells 150 mAh 300 mAh higher capacity would like give twins try dont mind building two wings Hand ley Page W8b construction article illu strates example new breed Mini-Electric Free Flight Scale models Re member Free Flight Dornier Do-X now practical reality Lets cut balsa Handley Page/SruII Continued page 95 pieces cover lightweight white Japanese tissue Lightly water spray tissue shrinkage dry brush three four thin coats nonshrinking dope such Sig Lite Coat buty rate clear brushing lacquer sure paper wood surfaces sealed spray couple very fine coats silver dope lacquer Theres no need load up thick opaque finish light uniform coverage adequate particular aircraft modeled G-EBBI has somewhat tricky attractive trim dark blue stripe edges fuselage longe rons well outlines vertical fin/rudder assembly marked stripes drafting pen filled thinned blue enamel brushed interior stripes fine brush Doing somewhat tedious looks pretty good Registration letters can masked sprayed onor cut black tissue other fuselage lettering rub-on dry transfers drawn pen ink let tering guide Handley Page logos fin nose inked onto piece silver-doped tissue stuck Continued page 174 September 1988 173 P Off M CATAM double-sided tape Wait until after initial test flights before permanently attaching 6 dowel motor nacelle braces lightly glue Ambroid first adding radiators vacuformed engines will enable make minor thrust adjustments needed easily Lastly carve some foam pilot figures add much rigging control ca bles like flying Make sure surfaces un warped balance point shown plans first test flights should very calm weather over softest sur face can find green grass ideal Test charge flight battery several times get feel long charge needed get 8- 10-sec motor run Since really cant test glide model will use short runs sort things out initially Put tweak about /16 right rud der Charge motor 8- 10-sec run carefully launch model Re move noticeable turn dive stall ten dency rudder elevator surfaces large make small changes time Shoot straight power glide almost level flight no tendency slow down hang props short hops satisfactory gin lengthen charge get five 10 additional seconds power Remember lengthen charge initial power level will increase somewhat time reach 20 30 seconds power should getting very slight initial climb level cruise Keep turns very wide gentle power exhausted model will descend slow steep glide isnt thermal soarer allow model climb nosehigh near stallespecially gusty weather Trim relatively shallow pen etrating climb satisfied short power runs charge up enjoy prettiest Free Flight sights youre ever likely see Dihedral/Beron-Rawdon Continued page 99 will roll 15/10 x 20/30 same roll rate Going plot Figure 4 80-in-span planes find roll rate should about 26 degrees per second Good thing plots agree Figure 5 also contains same informa tion three EDAs function yaw angle NEW IMPROVED * * LIjila WiMit todd wilk wouli Pow *US Pcte,tNx Des ** WANDIT * 2763 * * ies exited * eveamarramiPo1OftCORDJ * * elorOry * ick Abrasives * * Machine gives exceptional * ing control excellent tinixh * * 5 easic mci 1 fiat Wand aed 1 * nisantsp * ulde Specel iint 2 fIat 1 hail* rauma wand 5 xl grits * ehsiie ricxdes3liai2 hail 10uSd xi * gits * ditional Wandx Abraxivex available * *WANDIT MANUFACTURING 214 2885789 PO Box 266 uite Texas 75149 MINIJET SERIESOhs Proud gird thePreiLd Sun Onese planes feature xii balsadesigned meet rxnstructlon Designed ciththe g/7 0SPRA Furmula intccnedlate flyer xindthey clii 120 rulesnhis 1/u accept 2025 sizeenginefuse scale wedel ciii accept rear eahaust engine fur xx 60i20 cl size engines ccptionai perforxanceOet p glass fuselageclth uf tIe thrill jet cithoutoo wing cxnstructixn full kit $15000 ccv hassles nutted fanSkphack Semikit alma axailable Ins cund $02100 Special Introdactocp PricePlease add $1000 shipping handling $4000 plus $300 flu hes Send check Mdadd 5% sales tax Mastercard hisS C0D add $3003001 15lA477 PARRISH AIRCRAFT c SCALE cOAStS Toy Turkyp Fornula lDart Experimental o SW 49lkTer $9100 $5 SIRtigershurkceoplace full size aircraft antalien FIx 33317 Prototypical dihedral arrangements Al though different dihedral schemes same Equivalent Dihedral Angle will roll same rate actual localized flow air over wing will vary considerably sake illustrating behavior less rudder yaw near stall fly speed margin stall rapid maneuvers required Polyhedral Breaking wing up four sections instead two V-dihedral re duces range angle attack variations across wing during steady-state roll illustrated Figure 9 saw tooth line reduces possibility leaving drag bucket during maneuvers can imagine number wing panels increased sawtooth becomes progressively finer until equivalent elliptical wing reached Discussion see above designer rudder-elevator airplane has few options play order control maximum roll rate plane RC Sailplane applications desire achieve high roll ratemore almost al ways better Span airspeed powerful variables usually determined higher prior ity requirements such glide ratio 174 Model Aviation AND PRINTING SERVICE QUICK SERVICE OVER 300 ORDINATE SETS ON FILE SEND 5200 xodS1SEloogeonelopeforsuoooplea tlxs list xf niefuil xx isuod xxxv SEP10 S500 SASE bag fur plot ta chord irogIlo suet oxooples oxooc scvezxl xixfuds lox ocdcc pocfccruccc IncludE pLots copy thc thepe rod die dhta possible SEND $1011 fur doe PLOT SHAPE CATALOG xfcbe 100 plus olotuds loc St ditch plots pius lustsoicxi xoofcol iofnzxoxloon sdsec osefxdl aicfod duos roan/many puges STANDARD PLOTSander Oliorhex ISLE poge Lorge docoda noriloble no coDs cost cssopcopscdoorlox clssod bxogob 20 chord tosice coat sf10 p1st CUSTOM PLOTnEG AVAILABLE Can modifr oanbcx olijobosass mdi pieces Osgather coos slow vanous also thocboocSScs top & bottom ilifrorot TAPERED 1NO PLOTS $1000 Secop pbua 50 roots pci rib oven 10 slightly higher THIS MONThS HOT PLOTS MACA 6100 MACA 0000 Orcut foc stabs EPPLER 102 205 SIOil Oxsd chE cod af Mooch magsoioe issue date Can slow Slid oh no tltdiSlsixnldclooess NO EXIThIL CHARGE Hot plots Osly $100 over 10 $101 THE PTERANOOOH PRESS 0N PODOSS0 OAE ANn CA 0160 0 0 StarBase Exchange 1902 Walnut Montgomery AL 36106 dee. Write free catalog SVNASA patches flight suits pictures astronaut food much VISA/MC 1-800-426-1354
Edition: Model Aviation - 1988/09
Page Numbers: 94, 95, 173, 174
THIS AIRCRAFT 1922 first relatively successful British post-WW transports simply con verted bomber Seven W8b planes built used during period 1922 1932 Power provided two 350-hp Rolls-Royce Eagle VIII V-12 en gines Span 75 ft gross weight 12000 lb carried 12 14 passengers speed about 104 mph between major cit ies throughout Britain European con tinent model design presented spired Dave Stotts beautiful little rubberpowered W8f three-engine version W8 flew 1982 Construction pretty much same typical stick-and-tissue Rubber model Use lightweight balsa except noted plans Keep model light possible Dont reinforce beef up structure Save heavy RC-grade balsa RC proj ects Make sure structure straight well sanded before covering uncov ered fit wing temporarily fuse lage Line up both wings very carefully fit size interplane struts permanently glue struts place just get snug placements strut fit tings lined up glue rein force strut plug-sockets balsa gussets rib locations Several commercial motor units can used cases least wiring harness will have discarded Rewire system place battery switch charge-plug fuselage nose FE motor Knight Purdham unit can used pretty much although both will have mounted fairly close front nacelle against radiator cause short prop shafts VL MRC units can used though adaptation will required units shown plans used proto type model HiLine Ltd MiniElectric tinkerers kit Fit motor mount/nacelle frame motors attached time Use Am broid equivalent removable model ce I -7K mlnllatlo mote p, Knight & Pldhm 1411100 nIl 1iS4 ply aaba OIl S rota Sod Ito boaop TA ll ad 5 balsa right motor meant /aol prop ade wood actOr OlbOC aaOkao tIm lOSS p151k COIl. stir S - ho sPa oaooom Koala 0 0 PIt ii. iL \do. ooor lop bond pap r&d J~N jj Sbwaoordboll pla 0 labitg heirS balsa 94 Model Aviation Top The Handley Page stable majestic filer Three 150 mAh cells provide consistent flights over 1 mm Above model would difficult Free Flight subject other form power Mini-electric motors trick due small size synchronization ment tack-glue place Drill fit small wood screws pins anchor nacelles struts Make sure motor thrust lines 00 down left nacelle 30 down right nacelle No side thrust needed Drill hole fuselage front brace hollow plastic drink stirrer taches thread motor wires fus elage Hook up parallel wiring harness switch charging jack battery used three Sanyo 270 mAh cells model although three 150 mAh cells would probably adequate save several grams Attach 4-in plastic props check out propulsion system prior covering assure smooth operation proper direc tion prop rotation nacelles may seem little flimsy point fi nal assembly scale M6 dowel braces stif fen motor mounts enormously Covering rmishiflg Disassemble Continued page 173 tzizzzzzz 0atiootBOTTOOI W MRC LI ho mn oil tank SIC ont p 0 dOWnthraat right motor 0 Ott motor a. 0 di. pinto 0032 thttt ttmt tatib typlaaiotratatttahmOnt halo 68 drilt p0 tab 32 lag OUt hrO 100 070 mth 00 ii LiIfI opt omno intl opt0 ft inof 1-7 OFOCE 7 4 ///[/ [/7II/1-/ U --C TinrO WOOS yL 3/02 hont tlCdia mttttl rib otrots 0032 thtt ati othoro tote throad 00010 Ottlotimant points 171 II I1/80 318 dihndri II C 0 U S S 5 0 Cl 0 -U U I0 0 -tE -1 0 tot OUttOOO 1032 0 3032 tAo 3/32 LE part btortOt 000 hornS 0033 ply N 0 tOot 0/32 tO tatottot tram 3032 OhOt OOOtttO logo oo tin tog no. k\IIIqIIIII/ Jtr Li Pt7 E*35537 W*@U WuOb FOR TWIN MINI-ELECTRtC MOTORS SCALE 10 35r SPAN ENGTH AREA540 iNCHES OmolgOOd sd Draon i N /00/// 7 Irrtplrmd Doom 52030 HP WSt Design September 1988 95 span about 30 flying weight 6 oz results being compact mood big enough detail Construction uses traditional stick-and-tissue methods x1w/ /bondtiotor Latt aino 8Otao 0 dOroni ply both tin. otiarat ttflrbtan dOtE bOa otrlpbtg tattintO tonoproOt 00 roiatd thiroddar oatS. 3132 wino bitob togittrttionr priOtitO 00th OttO ooOat/rOdintOtO moot tidomoto VINYLWRITE CUSTOM LETFERING Providing elegant time saving economical finishing touch modelers EZ TO APPLY Our lettering comes pre-spaced & pre-aligned Saves hours cutting & fuss aligning individual letters decals text custom computer cut fuel proof vvinoucnw premium l thin ical horizontal text om lengths olors vinyl 6 typestyles inc Military Block ted upright text high Priced right no minimum charge example can have AMA number 2 high text color $300 H orders processed upon receipt shipped via first class mail VINVLWRITE CUSTOM LETFERING 16043 Tulsa Street Granada Hills CA 91344 818 363-7131 between Noon 6PM pst order C4 res add tax fly cx & sum sin oa. veer no MU 9169 Call write complete info pack & sample ITS FREE Fly VINYLWRITE Custom Lettering model today torn motors tells cant difficult Two custom motor combina tions have found work well Rewind #30 wire 31 gear ratio 6-in Peck-Polymers prop two 100 mAh cells b Rewind #32 wire 61 gear ratio 7-in Peck-Polymers prop three 100 mAh cells latter motor system powers 26-inspan Curtiss OC-2 biplane 150 sq area 4 oz weight flies great three 100 mAh cells routinely provide beau tiful flights 1 2 mm want try hand making couple custom mini-motors dont mind rewinding own new company called HiLine Ltd PO Box 1283 thesda MD 20817 sells tinkerers double mini-motor kit $1295 plus $150 post age contains three Kodak motors case goof up rewind wire two sets gears shafts etc plus rewinding/as sembly instructions HiLine also sells parts kit hand-held field charger de scribed earlier timer $1995 plus $200 shipping Send pre addressed stamped envelope price list items way doubling power minielectric motors course gang two motors single spur gear photos show such dual motor system couples two rewound HiLine motors 61-ratio spur gear Power three 150 mAh cells 8-in Peck prop enough 250 sq model weighing 8 10 ox Total weight illustrated dual motor system 60 grams Dual mo tors course will draw twice power flight battery does single motor Multi-mini-motor systems ideal multi-engined Free Flight Scale models Scale subjects heretofore unthink able Free Flight now no big deal demonstrate point ourselves built flew 42-in-span Do-X few tips typical multi-engine models powered Mini-Electrics wing area multi should scaled up roughly number motors two-cell twin motors try model wing area between 150 240 sq three-cell twin motors go 200 280 sq Wing loading should kept between three five ounces per square foot lower better Prop diameter multis often limited reason lower gear ratio motors usually suitable some cases lower gear ratios found conunercial units will beneficial Thats advantage customizing own mo tors Suitable plastic props multis diameters 4 5 made Kaysun Oldtimer Models carries North Pacific Peck-Polymers Wil liams Brothers course can also make own props scalelike three- four-bladers Rule wiring multimotor motors should wired together Other wise primary advantages multi electrics would lost almost perfect auto matic synchronization Basically can wire multis together parallel series Lets take example Say have twin using two three-cell motors draw ing 2 amperes current illustra tions shows two possible arrangements either case need double battery en ergy single motor system series arrangement would use battery six cells say 70 mAh capacity draw 21/2 amps current parallel arrangement would use three cells 150 mAh capac ity draw five amps current bat tery advantage series setup higher voltage lower losses battery because lower current advan tages parallel setup include easier charging three cells still can use standard field charger second ad vantage parallel wiring will use much reliable robust battery less chance single cell go bad less problem cell balance etc Overall prefer parallel system its simplicity reliability four-motor six-motor airplanes eight 10 12 etc same princi ples apply although options available basic requirement pair up opposite-side motors example out board left outboard right same cells Another drawing illustrates enough various alternatives give idea parallel-wired multis cells used flight battery pack have higher capacity commonly used conventional single-motor MiniElectric Cells 150 270 higher capacity may necessary twins 150 mAh- 270 mAh-capacity cells about correct size Radio Shack sells 150 mAh N size packages two $499 catalog #23-121 Ace RC sells San yo 270 mAh cells $390 SR Batter ies carries high quality cells 150 mAh 300 mAh higher capacity would like give twins try dont mind building two wings Hand ley Page W8b construction article illu strates example new breed Mini-Electric Free Flight Scale models Re member Free Flight Dornier Do-X now practical reality Lets cut balsa Handley Page/SruII Continued page 95 pieces cover lightweight white Japanese tissue Lightly water spray tissue shrinkage dry brush three four thin coats nonshrinking dope such Sig Lite Coat buty rate clear brushing lacquer sure paper wood surfaces sealed spray couple very fine coats silver dope lacquer Theres no need load up thick opaque finish light uniform coverage adequate particular aircraft modeled G-EBBI has somewhat tricky attractive trim dark blue stripe edges fuselage longe rons well outlines vertical fin/rudder assembly marked stripes drafting pen filled thinned blue enamel brushed interior stripes fine brush Doing somewhat tedious looks pretty good Registration letters can masked sprayed onor cut black tissue other fuselage lettering rub-on dry transfers drawn pen ink let tering guide Handley Page logos fin nose inked onto piece silver-doped tissue stuck Continued page 174 September 1988 173 P Off M CATAM double-sided tape Wait until after initial test flights before permanently attaching 6 dowel motor nacelle braces lightly glue Ambroid first adding radiators vacuformed engines will enable make minor thrust adjustments needed easily Lastly carve some foam pilot figures add much rigging control ca bles like flying Make sure surfaces un warped balance point shown plans first test flights should very calm weather over softest sur face can find green grass ideal Test charge flight battery several times get feel long charge needed get 8- 10-sec motor run Since really cant test glide model will use short runs sort things out initially Put tweak about /16 right rud der Charge motor 8- 10-sec run carefully launch model Re move noticeable turn dive stall ten dency rudder elevator surfaces large make small changes time Shoot straight power glide almost level flight no tendency slow down hang props short hops satisfactory gin lengthen charge get five 10 additional seconds power Remember lengthen charge initial power level will increase somewhat time reach 20 30 seconds power should getting very slight initial climb level cruise Keep turns very wide gentle power exhausted model will descend slow steep glide isnt thermal soarer allow model climb nosehigh near stallespecially gusty weather Trim relatively shallow pen etrating climb satisfied short power runs charge up enjoy prettiest Free Flight sights youre ever likely see Dihedral/Beron-Rawdon Continued page 99 will roll 15/10 x 20/30 same roll rate Going plot Figure 4 80-in-span planes find roll rate should about 26 degrees per second Good thing plots agree Figure 5 also contains same informa tion three EDAs function yaw angle NEW IMPROVED * * LIjila WiMit todd wilk wouli Pow *US Pcte,tNx Des ** WANDIT * 2763 * * ies exited * eveamarramiPo1OftCORDJ * * elorOry * ick Abrasives * * Machine gives exceptional * ing control excellent tinixh * * 5 easic mci 1 fiat Wand aed 1 * nisantsp * ulde Specel iint 2 fIat 1 hail* rauma wand 5 xl grits * ehsiie ricxdes3liai2 hail 10uSd xi * gits * ditional Wandx Abraxivex available * *WANDIT MANUFACTURING 214 2885789 PO Box 266 uite Texas 75149 MINIJET SERIESOhs Proud gird thePreiLd Sun Onese planes feature xii balsadesigned meet rxnstructlon Designed ciththe g/7 0SPRA Furmula intccnedlate flyer xindthey clii 120 rulesnhis 1/u accept 2025 sizeenginefuse scale wedel ciii accept rear eahaust engine fur xx 60i20 cl size engines ccptionai perforxanceOet p glass fuselageclth uf tIe thrill jet cithoutoo wing cxnstructixn full kit $15000 ccv hassles nutted fanSkphack Semikit alma axailable Ins cund $02100 Special Introdactocp PricePlease add $1000 shipping handling $4000 plus $300 flu hes Send check Mdadd 5% sales tax Mastercard hisS C0D add $3003001 15lA477 PARRISH AIRCRAFT c SCALE cOAStS Toy Turkyp Fornula lDart Experimental o SW 49lkTer $9100 $5 SIRtigershurkceoplace full size aircraft antalien FIx 33317 Prototypical dihedral arrangements Al though different dihedral schemes same Equivalent Dihedral Angle will roll same rate actual localized flow air over wing will vary considerably sake illustrating behavior less rudder yaw near stall fly speed margin stall rapid maneuvers required Polyhedral Breaking wing up four sections instead two V-dihedral re duces range angle attack variations across wing during steady-state roll illustrated Figure 9 saw tooth line reduces possibility leaving drag bucket during maneuvers can imagine number wing panels increased sawtooth becomes progressively finer until equivalent elliptical wing reached Discussion see above designer rudder-elevator airplane has few options play order control maximum roll rate plane RC Sailplane applications desire achieve high roll ratemore almost al ways better Span airspeed powerful variables usually determined higher prior ity requirements such glide ratio 174 Model Aviation AND PRINTING SERVICE QUICK SERVICE OVER 300 ORDINATE SETS ON FILE SEND 5200 xodS1SEloogeonelopeforsuoooplea tlxs list xf niefuil xx isuod xxxv SEP10 S500 SASE bag fur plot ta chord irogIlo suet oxooples oxooc scvezxl xixfuds lox ocdcc pocfccruccc IncludE pLots copy thc thepe rod die dhta possible SEND $1011 fur doe PLOT SHAPE CATALOG xfcbe 100 plus olotuds loc St ditch plots pius lustsoicxi xoofcol iofnzxoxloon sdsec osefxdl aicfod duos roan/many puges STANDARD PLOTSander Oliorhex ISLE poge Lorge docoda noriloble no coDs cost cssopcopscdoorlox clssod bxogob 20 chord tosice coat sf10 p1st CUSTOM PLOTnEG AVAILABLE Can modifr oanbcx olijobosass mdi pieces Osgather coos slow vanous also thocboocSScs top & bottom ilifrorot TAPERED 1NO PLOTS $1000 Secop pbua 50 roots pci rib oven 10 slightly higher THIS MONThS HOT PLOTS MACA 6100 MACA 0000 Orcut foc stabs EPPLER 102 205 SIOil Oxsd chE cod af Mooch magsoioe issue date Can slow Slid oh no tltdiSlsixnldclooess NO EXIThIL CHARGE Hot plots Osly $100 over 10 $101 THE PTERANOOOH PRESS 0N PODOSS0 OAE ANn CA 0160 0 0 StarBase Exchange 1902 Walnut Montgomery AL 36106 dee. Write free catalog SVNASA patches flight suits pictures astronaut food much VISA/MC 1-800-426-1354