right T dral angle ssary icarly ni cue frames con d Fiber insulatioi fine F ers quite ea enough hold nile hties i out sh j us wv scrappiec coup solderina 4th aCD& tfl n use e tli WOOd Loacur ealsa wil water wood hold uom age ss P-30 rubberpowered model can interesting change pace fairly small size re quired plastic prop can built quickly inex pensively text provides some ex cellent information have modest ex perience Clarence Mather work fine used properly favor phatic resins such Titebond soak wood form very strong joint dont shrink dry slowly enough pieces can fitted carefully Such glues quite thick usually squeeze some small bottle add few drops water weakens glue somewhat still plenty strong slightly-diluted glue will keep very lone mix small por tion time Coatboth edges joint allow glue soak several seconds As pieces joined some glue will squeeze out Use damp brush immediately remove much ex cess possible glue side frame dry remove pins leave frame plan Lay piece Saran Wrap over assemble second frame top first produce matched pair frames removed plan separated drill holes rear motor already done run glue ring around hole inside strengthen balsa number holes made because rubber varies thick ness batch batch sometimes varies different places within strip times unwound motor must slack freewheeling unit func tion dont want too much slack multiple holes allow adjustment motor proper amount slack Utilize two jig formers assemble two side frames box Jig farmers simply rectangular pieces sheet balsa cut fit between frames glued lightly place hold frames position adding fuse lage cross members jig formers cut free Lay fuselage sides members sheeted areas Cut flat inside facing up Glue jig couple observation holes sheeting formers vertically Lay second bottom rear peg holes fuselage side atop jig formers taking wood dowels used medical swab sticks care box formed square good size wing stab hold ends sides Add cross down rubberbands Pieces A2-in piano September 1984 69 model features tip dihedral strong lateral stability forward dethermalizer fuse mounting just behind wing shows clearly above picture moderately heavy plastic prop combined lightweight rear end allows wing placed well forwardand long stable efficient rear moment arm results -SIZE PLANS AVAILABLE. SEE PAGE 180 33 HARD F ISE 1/B FOR WASHOUrCENTER PANEL IS FLAYWING SPAR JOINTND WASHOUT 2P DIHEDRAL THREE LAMINATIONS OF 1132x1S.STAB EDGES AND SPAR HARD 11BP ASTIC PROP TWO LAMINATIONS 132xV16 /POWER-THREE DOPS OFPECK SHAFT IIII18 RUBBER OGRAMSBEARING IIIIISLIGHT ROH RUDDER HRUS XXIIIIII332SHEE BOX FUSE 1/4 TUBE NCEBA SW-A ERNATE NOSE A-WIRE GUIDE4 MONOFILAMLNT - ---- HIN PIANO WIRE EYE-/ -STAB1/B TUBEN3/32 HARD BALSA FRAMESCROCKET p_, -- REHODK- SMALL DOWELHDOK II - -i7CTh -7 FUSE OMITTED STAB RIBWING CENTERWING TIP ALLARE132FIRMBALSA911112 SWEET P-3D CAtA wire would also job wire harder keep glued place inner part nose plug must fit snugly front fuselage may fall out during glide ruin flight Some modelers glue couple small hooks fuselage cut groove nose block loop rubberband around block hold place PeckPolymers sells nose bearings prop shaft combos well plastic props P-30s work fine stocked hobby shops fuselage side view shows detachable rubber hook used winding tube can employed protect fuselage motor breakage during winding sketched cast aluminum hook sold Jim Crocket Various types homemade modelers simpler unit shown cross-sec tion sketch modelers wanting wind motors directly detachable type recommended because sooner later motor will break rubber wound full turns As P-30 very light model can soar quite well drag freewheeling prop Unless plan fly early mornings late eve nings dethernializer definitely needed shown plan reduce fire hazard flying fields covered dry grass brusha fire just waiting start Fortunately fire isnt likely start unless igniter down low dry material dense fuse located atop fuselage nearly impossible dethermal izer line tied eye rear fuselage brought forward over top stab Thus line fully exposed easy install adjust Al Ulm Orbiteers Club came up variation believe works fine free end snuffer tube cut projection sticking out act hook forward end dethermalizer band fine jewelers saw does job well Note projection blends rest tube rounded curve strength Dont put larger loads thin aluminumthe rubberbands have stretched twice length Glue snuffer tube fuse lage sheeting very securely fill area below tube piece Y6 balsa piano wire side hooks solidly glued piece whole unit can secured piece silk gauze glued overall dethermalizer line installed until after fuselage completed Wing Pick piece firm sheet /32 balsa ribs Cut 14 rectangular pieces bit larger wing center panel ribs Trace rib pattern two ribs place end stack pieces Pin stack together shape stack rib pattern tapered tip panels cut out eight rectangular pieces trace largest rib pattern end smallest rib another Stack pieces patContinued page 167 70 Model Aviation gn makes use classic stick-andtissue construction system produces very good strengfth keeping weight weii P-30 event specificatIons 020 Replica Fred Emmert 1200 first second Brad Levine 1049 third Dick Lyons 839 fourth Bill Valentine 806 fifth Bob Sunberg 759 Cabin won Hal Cover time 916 Larry Clark second 850 third Leon Nadol sky 742 Al Heinrik fourth 635 Bill Booth 5th 606 B Cabin saw Sal Taibi again first place fine time 1414 C Meyerscough second 1134 third B Aveustus 928 Dick Lyons fifth 853 C Gas exciting Doug Galbreath totaled amazing 4942 before finally missing max used OS VRB RC engine modified Dukie plane 101 aspect ratio weighed 43 oz say climbed rapidly would putting mildly Ralph Prey totaled 2947 second place third Dan Keegan 2205 Scott Reid fourth 1934 Wes Funk fifth 1405 Doug won Ocie Randall Trophy fourth time winning flight time A-B Nostalgia again proved later-year models fly longer bet ter power Dan Keegan maxed out 2729 first Jack Moreland maxed out 2622 second Terry Thorkild son maxed out 2343 Jim Adams fourth 1301 David Martin fifth 835 Saturday Night-Flying event won Travis Hunter 2954 Chas Dorsett second 1430 Bill Ruff third 1428 Scott Reid fourth 1405 Forrest Staines fifth 1153 Long before 6 oclock Sunday morn ing 1AA Texaco regular Tex aco models could heard droning away good warm air early starting get hot Sal Taibi put up AA Texaco total 4535 easy win over Bob Dittmars second-place 3106 Jim Adams third 2625 Bill Booth fourth 2047 fifth CJ Jordan 1628 regular Texaco event Bill Cohen ran away field flight 2932 almost double secondplace RB McKennas 1748 Jim Crocket third 1341 Larry Clark fourth time 1333 Brad Levine fifth 1241 C-D Nostalgia surprisingly no max outs RB McKenna won 1437 Dan Keegan second 1058 third Al Heitick 940 Hal Cover managed fourth D Gas found big Doug Galbreath max ing out 2325 Travis Hunter sec ond also maxing 2007 Dan Keegan third 1452 Bill Ruff fourth 1340 fifth Scott Reid 1320 Coupe dHiver another Bob-White-maxing-out contests total 1111 handily beat Joe Foster 1025 second Paul Masterson England third maxing 695 Ding BIGE SpEcihcATiofts Wisoypoow64 A.01206ooi0 Lossysh10 AwIAISywwSMcM Wolyb1 lb woody oo Ily P0EURA 2ENOAH ow QUADRA oy6oO P100 opociFy wlich o,o3oo 0 bol, 8w8 wlo odo8 voc ki Font. Ey bcld oooofwo bow owdwy MI bolwood 08 plywood poc0 wAs pouloo 08ws poolmd loll bs8s 81 odbooco0lcodRpbc IJMOOA wl% 0Ochso ME llcpww 08 IwwllAAo ocp~ SlAy Zwohol 7-bol sob 5l895 RowI poop dUll ip 1965 dOib so, shook ooSLOOow wood olcwlwcsd bock plo, 51895 Zarate fourth 659 Jim Quinn fifth 582 B Gas some reason another scored FAT fashion Bill Morgan maxed-out 1647 first place Don Berry maxed second place 1140 Jack Moreland maxed 960 sec third place Jon DeFries fourth 896 sec Mike Steam fifth 856 no scores announced A-l Towline Payload Electric ever winners follows A-i won Martyn Cowley sec ond Mike Johnson third Steve Geraghty fourth Antonio Abauza fifth Bill Booth Jr Payload first Terry Thorkildson sec ond Gus Sunberg third Erik Strengell fourth John Bonang fifth Ron Wittman Electric won Blane Beron Rawdon second Lynne Wainfain third Jim Ogg fourth Jim McDermoth fifth Tony Naccarato Last certainly least Grand Champion Marc Sisk traveled way Davenport IA really no wonder wonhe helper pretty wife Hattie Team Championship won San Diego Club #2 comprised Cezar Banks Paul Altonhoff guy gets Tomy timers around Bill Burke Joe Norcross announced after con test will Contest Director next year will flying hot day contest Sunday FLYING NEAR Al RPORTS BE CAREFUL PROTECT YOUR RIGHTTO FLY Us qoood 608111 wyl SIC F oow lo owls. Sd lowdiwo 05 locoslow pcoo.d 608 coo. bow oloo Ssd dock Ply loll p,.o *16 pow, TOOPO loclcdollIoosdosow oocopwIlwIooloowobly ThE NEW UPDATED E & L ZENOAN ENqINE PRECISE RIIJI VibuAhiaft p & L opdosod Iooo.co loclod bolSociwO iwllSOoOis cowpoOoiow d0 odlfid woMb, bopoocod Aiip cowboooboo ooood 46 owd cowol oob shoosol lbwboco jdId Spocdicoslooso 226 CID 2cyclo ydwooo p0Od OwiAs. 105000855 Polk bcobwy *010 piw owd powood posoonwy Sowooshi Mocb I, ciboosiow show botocod QUADRA powofoItPoowoOO lUbOpsop os 7500 RPIOI Dooblo boll booIwA cowkolAf Sold-,oo lOobolo 0 polOss WOiOIOS4 lb20 Eooylsoodssoosowy MASTERCARD Sweet P-3OlMather Continued page 70 tern end other pattern other Shape stack rib pat terns place first rib left panel second rib right panel continue alternating placement Cut strips 1/32 sheet tips Make inch longer min imum Soak strips water overnight bend same manner fuselage longerons dont like make rounded tips simply square off model will fly well Laminat ed tips such light strong Assemble wing center panel plan Use hardest strips leading edge top spars Note spars extend beyond last rib lapped joint can formed tip panel spars Such joint much stronger butt joints Usually bottom spars added after frame removed board pin surface flat again glue sets Assemble tip panels spars make easier shape joints right panel flat left panel washed out means trailing edge raised whole panel twisted So prop up trailing edge left tip panel being assembled ribs glued twist built Pin completed center panel board set tips position propped up correct dihedral angle Cut tip panel leading trailing edges angle mate wing edges Dont fret joints perfect though advantages aliphatic glue can brushed joint gaps form strong bond Observe panels rear right has no twist left trailing edge September1984 167 VISA B & L Manufacturin1 AbTl Losodo Lw, Scossodolo Awoowo 65251 602 41-OhS Tail surfaces outlines stabili zer fin made hard /16 balsa course /32 balsa can substituted dont like working smaller sizes hard /I6 available However hard /16 makes strong light surface stab ribs made same fash ion wing ribs fin has symmet rical airfoil requires additional step As rib cut curved left side sliced off portion shown line top view fin assem bled over plan fin re moved plan left sides ribs glued back fin airfoil critical given some thickness resist warping effective flat plate Coverlag/finishing preparation covering sand parts fine sand paper remove bumps rough spots coat wood parts will contact covering tissue two three coats clear dope dope step can fairly thick Again sand lightly fine sandpaper Lay piece tissue over area covered brush dope thinner liber ally over wood structure through tissue thinner will penetrate porous tissue soften dope will adhere tissue Check loose areas reapply thinner Cover fuselage before fin glued cover fin after glued fuselage area fuselage encloses tne motor given two layers cross grained tissue makes fuselage very rigid Apply layer water-shrink tissue apply coat finishing clear dope apply second layer finishing clear dope should rather thin Three parts thinner part dope good like use nitrate dope add three drops castor oil per ounce thinned mixture leaves tissue bit flexibility reduces amount shrinking some what Two coats will suffice Glue fin fuselage just little offset right turn cover water-shrink apply dope Check carefully rear about /32 left fin side should visible right During finishing process warp may have developed Boil water kettle having spout place warped part steam twist opposite direc tion remove warp Flying Weigh out 10 grams A-in rub ber strip make motor three loops six strands Make secure knot thoroughly soaking ends saliva tying overhand knot Pull tight near breaking point rub ber Again soak ends tie another square knot upon first Install motor model utilizing peg hole leaves motor slightly slack Aluminum tubing outside diameter will work rear peg stretch rubber hard fullwinds effort sure slide piece /6 piano wire larger through tube first Assemble model using rubberbands stretched about twice atrest length Slip stab under monofilament connect rubberband peg run through hook stab onto second peg stab will pull up dethermalizer posi tion Place small rubberband over snuffer tube end straddle fuse loop under side hooks connect hook end monofilament pushing rear stab down Check balance point model add weight front rear necessary achieve balance 1 ward trailing edge Observe model rear stab should parallel center section wing though right tip can slightly high flight testing lubricate motor motor placed small plastic bag rubber lube poured inside will less mess Fudo Takagi first suggested procedure believe Try locate area covered weeds grass testing disadvantage freewheeling propellers blade can snap off during fast landing hard surface Hand-glide model pointed slightly nose-down coming breeze model glides quite slowly because its light weight prop drag violent diving stalling occurs check wing stab angles balance point OK try different launch speed diving persists shim up rear stab conversely put shim under front stab model stalls Strips IBM tab cards make good thin shims Most models require some downthrust avoid power stalls ticipate putting A2-in piece balsa between top nose block fuselage Wind motor about 100 turns launch slightly nose-high position Ideally model will climb few feet glide down large right turn model goes straight dur ing both parts flight steam little turn finor glue small tab trailing edge fin up stab wont hit power phase flight straight shim left side nose block glide phase flight too straight place shims between right side fuselage stab stab tilt Power stalling can corrected additional downthrust side thrust As flight pattern smooths out crease number turns Eventually model should climb steeply slight right bank circle Try changing down side thrust small amounts get maximum altitude models climbers too much right rudder right thrust model may drop right wing during first part climb fine balance needed removing right rudder straightens out glide too much just add stab tilt fully stretched wound motor will take about 1000 turns de 88 Model Aviation up about Lay tip spars posi tion angle ends form good joint center panel spars As glued check panels unwanted warps pending upon type rubber used prop run typically 20 25 seconds though model gets quite high will come down fast unless ther mal contest flying practice picking good air well trimming model Good Flying FF IndoorlTenny Continued page 71 new high-tech material requires some special handling and/or building techniques race develop reliable low-weight building methods us ing materials Help using carbon boron fibers new plastic films other materials improve models tell us about word warning Howard Haupt editor El Torbellino newsletter San Diego Orbiteers very recent issue printed following warning Boron glass-like material can very brittle Being brittle can shatter cause small sharp slivers slivers can penetrate skin ease will work themselves back surface Once under skin slivers least minor irritant worst danger heart lungs work way bloodstream Modern boron fiber pretty well behaved will break cleanly bent sharply pliers must take care dispose scrap ends broken off Little pieces boron cannot left laying about worktable floor Two ways discussed ensure proper disposal boron scrap ends have small bottle table repository boron scrap work material As break end off pliers continue grip pliers drop bottle Two place masking tape end boron trimming After breaking off end tape attached dispose wastepaper basket Bostonian year Manhattan Cabin became official event rush set records four AMA ceiling categories three age classes uni fies activity standard rules Now Ed Whittens New York door Times get set official rules Bostonian Cabin 1 Maximum projected wingspans 16 maximum wing chord 3 2 Maximum propellers diameter 6 3 Power limited rubber motors 4 All surfaces double-covered 5 Minimum weight rubber motors 7 grams 6 Maximum overall length 14 excluding propellers 7 Fuselage must contain exceed theoretical box measuring 1 x 2A x 3 longerons must both supNow Kit Form Save easy assemble 4 channel kit expandable 71 OnlyS 7995 service parts available past manufactured EK Logitrol radios including Logitrol manufactured Cirrus Tower Hobby Lobby radios Free servo reversing Hobby Lobby radios included service work FCS-4 Four Channel Radio Wider body ends aching shoulder muscles Angled easier monitering battery charge Designed easily accept new frequencies Servo reversing simply reversing plug Adjustable stick tension Inexpensive replacement servos V 4UOmAH battery pack I600mAH ft 1200mAH extral Expandable port motor form exceed box requirement No motor sticks allowed Fuselage must have forward windshield window side least square inch area 8 Landing Gear must fixed least two wheels Y4-in minimum diam eter rigid enough successfully sup port model hand-glided landing 9 Rise Off Ground least two wheels required takeoffs official flights 10 Charisma FactorThe judge rates model model appeals him based construction neatness scalelike details unique features design etc 100 rating up 130 used Two models may given same rating models rated against other against 100 130 scale 11 An unlimited number flights allowed total full seconds three best flights multiplied Charisma Factor determining models score 12 More model may entered prize entrant will awarded Ed Whitten has said Bostonian Cabin models Flying Scale models . except no full-sized mancarrying version Two photos models built some time back John Triolo shown perhaps can see what Ed means might notice design feature two modelsJohn clever ly arranged designs accommodate full-length motors best rubber usage Bedford reg ulars sessions Bedford Boys Ranch Bedford TX Al Backstrom Frisco TX Al flies some Indoor Scale flying wing models really fun $11995 wIth large lInear serve $12995 maK rotary servos Send 8Sf let cemplete catuleg 509 4S72 122 watch model launching photo flying-plank style use nothing except reflex airfoil stability model doesnt seem lack stability can hit ceiling recover very little loss alti tudefar better Scale models better some serious Indoor models Bud Tenny PO Box 545 Richardson TX 75080 FF DurationlMeuser Continued page 73 inner tip wing panels angles B D angles need know setting ribs adjacent dihe dral breaks sanding proper angle dimensions m h amounts prop up end panel gluing end another scenarios involving considerable trial-and-error modelers arrive final dimensions wings Ferrers Second Notion seems pretty good what model designer would really like 1 establish semi-span tip angle 2 establish ratio c d 3 invoke Ferrers First Notion about ellipse business other numbers interest should fall out onto floor ratio c d Well suppose decide rib spacing uniform throughout wing previous experience perhaps simply wild guess decide tip panel should have six rib spaces inner panel should have 10 c/d John calls R simply 10/6 Continued page 172 September 1984 169 Full Command Systems 908 E Rosewood Spokane WA 99208
Edition: Model Aviation - 1984/09
Page Numbers: 68, 69, 70, 167, 168, 169
right T dral angle ssary icarly ni cue frames con d Fiber insulatioi fine F ers quite ea enough hold nile hties i out sh j us wv scrappiec coup solderina 4th aCD& tfl n use e tli WOOd Loacur ealsa wil water wood hold uom age ss P-30 rubberpowered model can interesting change pace fairly small size re quired plastic prop can built quickly inex pensively text provides some ex cellent information have modest ex perience Clarence Mather work fine used properly favor phatic resins such Titebond soak wood form very strong joint dont shrink dry slowly enough pieces can fitted carefully Such glues quite thick usually squeeze some small bottle add few drops water weakens glue somewhat still plenty strong slightly-diluted glue will keep very lone mix small por tion time Coatboth edges joint allow glue soak several seconds As pieces joined some glue will squeeze out Use damp brush immediately remove much ex cess possible glue side frame dry remove pins leave frame plan Lay piece Saran Wrap over assemble second frame top first produce matched pair frames removed plan separated drill holes rear motor already done run glue ring around hole inside strengthen balsa number holes made because rubber varies thick ness batch batch sometimes varies different places within strip times unwound motor must slack freewheeling unit func tion dont want too much slack multiple holes allow adjustment motor proper amount slack Utilize two jig formers assemble two side frames box Jig farmers simply rectangular pieces sheet balsa cut fit between frames glued lightly place hold frames position adding fuse lage cross members jig formers cut free Lay fuselage sides members sheeted areas Cut flat inside facing up Glue jig couple observation holes sheeting formers vertically Lay second bottom rear peg holes fuselage side atop jig formers taking wood dowels used medical swab sticks care box formed square good size wing stab hold ends sides Add cross down rubberbands Pieces A2-in piano September 1984 69 model features tip dihedral strong lateral stability forward dethermalizer fuse mounting just behind wing shows clearly above picture moderately heavy plastic prop combined lightweight rear end allows wing placed well forwardand long stable efficient rear moment arm results -SIZE PLANS AVAILABLE. SEE PAGE 180 33 HARD F ISE 1/B FOR WASHOUrCENTER PANEL IS FLAYWING SPAR JOINTND WASHOUT 2P DIHEDRAL THREE LAMINATIONS OF 1132x1S.STAB EDGES AND SPAR HARD 11BP ASTIC PROP TWO LAMINATIONS 132xV16 /POWER-THREE DOPS OFPECK SHAFT IIII18 RUBBER OGRAMSBEARING IIIIISLIGHT ROH RUDDER HRUS XXIIIIII332SHEE BOX FUSE 1/4 TUBE NCEBA SW-A ERNATE NOSE A-WIRE GUIDE4 MONOFILAMLNT - ---- HIN PIANO WIRE EYE-/ -STAB1/B TUBEN3/32 HARD BALSA FRAMESCROCKET p_, -- REHODK- SMALL DOWELHDOK II - -i7CTh -7 FUSE OMITTED STAB RIBWING CENTERWING TIP ALLARE132FIRMBALSA911112 SWEET P-3D CAtA wire would also job wire harder keep glued place inner part nose plug must fit snugly front fuselage may fall out during glide ruin flight Some modelers glue couple small hooks fuselage cut groove nose block loop rubberband around block hold place PeckPolymers sells nose bearings prop shaft combos well plastic props P-30s work fine stocked hobby shops fuselage side view shows detachable rubber hook used winding tube can employed protect fuselage motor breakage during winding sketched cast aluminum hook sold Jim Crocket Various types homemade modelers simpler unit shown cross-sec tion sketch modelers wanting wind motors directly detachable type recommended because sooner later motor will break rubber wound full turns As P-30 very light model can soar quite well drag freewheeling prop Unless plan fly early mornings late eve nings dethernializer definitely needed shown plan reduce fire hazard flying fields covered dry grass brusha fire just waiting start Fortunately fire isnt likely start unless igniter down low dry material dense fuse located atop fuselage nearly impossible dethermal izer line tied eye rear fuselage brought forward over top stab Thus line fully exposed easy install adjust Al Ulm Orbiteers Club came up variation believe works fine free end snuffer tube cut projection sticking out act hook forward end dethermalizer band fine jewelers saw does job well Note projection blends rest tube rounded curve strength Dont put larger loads thin aluminumthe rubberbands have stretched twice length Glue snuffer tube fuse lage sheeting very securely fill area below tube piece Y6 balsa piano wire side hooks solidly glued piece whole unit can secured piece silk gauze glued overall dethermalizer line installed until after fuselage completed Wing Pick piece firm sheet /32 balsa ribs Cut 14 rectangular pieces bit larger wing center panel ribs Trace rib pattern two ribs place end stack pieces Pin stack together shape stack rib pattern tapered tip panels cut out eight rectangular pieces trace largest rib pattern end smallest rib another Stack pieces patContinued page 167 70 Model Aviation gn makes use classic stick-andtissue construction system produces very good strengfth keeping weight weii P-30 event specificatIons 020 Replica Fred Emmert 1200 first second Brad Levine 1049 third Dick Lyons 839 fourth Bill Valentine 806 fifth Bob Sunberg 759 Cabin won Hal Cover time 916 Larry Clark second 850 third Leon Nadol sky 742 Al Heinrik fourth 635 Bill Booth 5th 606 B Cabin saw Sal Taibi again first place fine time 1414 C Meyerscough second 1134 third B Aveustus 928 Dick Lyons fifth 853 C Gas exciting Doug Galbreath totaled amazing 4942 before finally missing max used OS VRB RC engine modified Dukie plane 101 aspect ratio weighed 43 oz say climbed rapidly would putting mildly Ralph Prey totaled 2947 second place third Dan Keegan 2205 Scott Reid fourth 1934 Wes Funk fifth 1405 Doug won Ocie Randall Trophy fourth time winning flight time A-B Nostalgia again proved later-year models fly longer bet ter power Dan Keegan maxed out 2729 first Jack Moreland maxed out 2622 second Terry Thorkild son maxed out 2343 Jim Adams fourth 1301 David Martin fifth 835 Saturday Night-Flying event won Travis Hunter 2954 Chas Dorsett second 1430 Bill Ruff third 1428 Scott Reid fourth 1405 Forrest Staines fifth 1153 Long before 6 oclock Sunday morn ing 1AA Texaco regular Tex aco models could heard droning away good warm air early starting get hot Sal Taibi put up AA Texaco total 4535 easy win over Bob Dittmars second-place 3106 Jim Adams third 2625 Bill Booth fourth 2047 fifth CJ Jordan 1628 regular Texaco event Bill Cohen ran away field flight 2932 almost double secondplace RB McKennas 1748 Jim Crocket third 1341 Larry Clark fourth time 1333 Brad Levine fifth 1241 C-D Nostalgia surprisingly no max outs RB McKenna won 1437 Dan Keegan second 1058 third Al Heitick 940 Hal Cover managed fourth D Gas found big Doug Galbreath max ing out 2325 Travis Hunter sec ond also maxing 2007 Dan Keegan third 1452 Bill Ruff fourth 1340 fifth Scott Reid 1320 Coupe dHiver another Bob-White-maxing-out contests total 1111 handily beat Joe Foster 1025 second Paul Masterson England third maxing 695 Ding BIGE SpEcihcATiofts Wisoypoow64 A.01206ooi0 Lossysh10 AwIAISywwSMcM Wolyb1 lb woody oo Ily P0EURA 2ENOAH ow QUADRA oy6oO P100 opociFy wlich o,o3oo 0 bol, 8w8 wlo odo8 voc ki Font. Ey bcld oooofwo bow owdwy MI bolwood 08 plywood poc0 wAs pouloo 08ws poolmd loll bs8s 81 odbooco0lcodRpbc IJMOOA wl% 0Ochso ME llcpww 08 IwwllAAo ocp~ SlAy Zwohol 7-bol sob 5l895 RowI poop dUll ip 1965 dOib so, shook ooSLOOow wood olcwlwcsd bock plo, 51895 Zarate fourth 659 Jim Quinn fifth 582 B Gas some reason another scored FAT fashion Bill Morgan maxed-out 1647 first place Don Berry maxed second place 1140 Jack Moreland maxed 960 sec third place Jon DeFries fourth 896 sec Mike Steam fifth 856 no scores announced A-l Towline Payload Electric ever winners follows A-i won Martyn Cowley sec ond Mike Johnson third Steve Geraghty fourth Antonio Abauza fifth Bill Booth Jr Payload first Terry Thorkildson sec ond Gus Sunberg third Erik Strengell fourth John Bonang fifth Ron Wittman Electric won Blane Beron Rawdon second Lynne Wainfain third Jim Ogg fourth Jim McDermoth fifth Tony Naccarato Last certainly least Grand Champion Marc Sisk traveled way Davenport IA really no wonder wonhe helper pretty wife Hattie Team Championship won San Diego Club #2 comprised Cezar Banks Paul Altonhoff guy gets Tomy timers around Bill Burke Joe Norcross announced after con test will Contest Director next year will flying hot day contest Sunday FLYING NEAR Al RPORTS BE CAREFUL PROTECT YOUR RIGHTTO FLY Us qoood 608111 wyl SIC F oow lo owls. Sd lowdiwo 05 locoslow pcoo.d 608 coo. bow oloo Ssd dock Ply loll p,.o *16 pow, TOOPO loclcdollIoosdosow oocopwIlwIooloowobly ThE NEW UPDATED E & L ZENOAN ENqINE PRECISE RIIJI VibuAhiaft p & L opdosod Iooo.co loclod bolSociwO iwllSOoOis cowpoOoiow d0 odlfid woMb, bopoocod Aiip cowboooboo ooood 46 owd cowol oob shoosol lbwboco jdId Spocdicoslooso 226 CID 2cyclo ydwooo p0Od OwiAs. 105000855 Polk bcobwy *010 piw owd powood posoonwy Sowooshi Mocb I, ciboosiow show botocod QUADRA powofoItPoowoOO lUbOpsop os 7500 RPIOI Dooblo boll booIwA cowkolAf Sold-,oo lOobolo 0 polOss WOiOIOS4 lb20 Eooylsoodssoosowy MASTERCARD Sweet P-3OlMather Continued page 70 tern end other pattern other Shape stack rib pat terns place first rib left panel second rib right panel continue alternating placement Cut strips 1/32 sheet tips Make inch longer min imum Soak strips water overnight bend same manner fuselage longerons dont like make rounded tips simply square off model will fly well Laminat ed tips such light strong Assemble wing center panel plan Use hardest strips leading edge top spars Note spars extend beyond last rib lapped joint can formed tip panel spars Such joint much stronger butt joints Usually bottom spars added after frame removed board pin surface flat again glue sets Assemble tip panels spars make easier shape joints right panel flat left panel washed out means trailing edge raised whole panel twisted So prop up trailing edge left tip panel being assembled ribs glued twist built Pin completed center panel board set tips position propped up correct dihedral angle Cut tip panel leading trailing edges angle mate wing edges Dont fret joints perfect though advantages aliphatic glue can brushed joint gaps form strong bond Observe panels rear right has no twist left trailing edge September1984 167 VISA B & L Manufacturin1 AbTl Losodo Lw, Scossodolo Awoowo 65251 602 41-OhS Tail surfaces outlines stabili zer fin made hard /16 balsa course /32 balsa can substituted dont like working smaller sizes hard /I6 available However hard /16 makes strong light surface stab ribs made same fash ion wing ribs fin has symmet rical airfoil requires additional step As rib cut curved left side sliced off portion shown line top view fin assem bled over plan fin re moved plan left sides ribs glued back fin airfoil critical given some thickness resist warping effective flat plate Coverlag/finishing preparation covering sand parts fine sand paper remove bumps rough spots coat wood parts will contact covering tissue two three coats clear dope dope step can fairly thick Again sand lightly fine sandpaper Lay piece tissue over area covered brush dope thinner liber ally over wood structure through tissue thinner will penetrate porous tissue soften dope will adhere tissue Check loose areas reapply thinner Cover fuselage before fin glued cover fin after glued fuselage area fuselage encloses tne motor given two layers cross grained tissue makes fuselage very rigid Apply layer water-shrink tissue apply coat finishing clear dope apply second layer finishing clear dope should rather thin Three parts thinner part dope good like use nitrate dope add three drops castor oil per ounce thinned mixture leaves tissue bit flexibility reduces amount shrinking some what Two coats will suffice Glue fin fuselage just little offset right turn cover water-shrink apply dope Check carefully rear about /32 left fin side should visible right During finishing process warp may have developed Boil water kettle having spout place warped part steam twist opposite direc tion remove warp Flying Weigh out 10 grams A-in rub ber strip make motor three loops six strands Make secure knot thoroughly soaking ends saliva tying overhand knot Pull tight near breaking point rub ber Again soak ends tie another square knot upon first Install motor model utilizing peg hole leaves motor slightly slack Aluminum tubing outside diameter will work rear peg stretch rubber hard fullwinds effort sure slide piece /6 piano wire larger through tube first Assemble model using rubberbands stretched about twice atrest length Slip stab under monofilament connect rubberband peg run through hook stab onto second peg stab will pull up dethermalizer posi tion Place small rubberband over snuffer tube end straddle fuse loop under side hooks connect hook end monofilament pushing rear stab down Check balance point model add weight front rear necessary achieve balance 1 ward trailing edge Observe model rear stab should parallel center section wing though right tip can slightly high flight testing lubricate motor motor placed small plastic bag rubber lube poured inside will less mess Fudo Takagi first suggested procedure believe Try locate area covered weeds grass testing disadvantage freewheeling propellers blade can snap off during fast landing hard surface Hand-glide model pointed slightly nose-down coming breeze model glides quite slowly because its light weight prop drag violent diving stalling occurs check wing stab angles balance point OK try different launch speed diving persists shim up rear stab conversely put shim under front stab model stalls Strips IBM tab cards make good thin shims Most models require some downthrust avoid power stalls ticipate putting A2-in piece balsa between top nose block fuselage Wind motor about 100 turns launch slightly nose-high position Ideally model will climb few feet glide down large right turn model goes straight dur ing both parts flight steam little turn finor glue small tab trailing edge fin up stab wont hit power phase flight straight shim left side nose block glide phase flight too straight place shims between right side fuselage stab stab tilt Power stalling can corrected additional downthrust side thrust As flight pattern smooths out crease number turns Eventually model should climb steeply slight right bank circle Try changing down side thrust small amounts get maximum altitude models climbers too much right rudder right thrust model may drop right wing during first part climb fine balance needed removing right rudder straightens out glide too much just add stab tilt fully stretched wound motor will take about 1000 turns de 88 Model Aviation up about Lay tip spars posi tion angle ends form good joint center panel spars As glued check panels unwanted warps pending upon type rubber used prop run typically 20 25 seconds though model gets quite high will come down fast unless ther mal contest flying practice picking good air well trimming model Good Flying FF IndoorlTenny Continued page 71 new high-tech material requires some special handling and/or building techniques race develop reliable low-weight building methods us ing materials Help using carbon boron fibers new plastic films other materials improve models tell us about word warning Howard Haupt editor El Torbellino newsletter San Diego Orbiteers very recent issue printed following warning Boron glass-like material can very brittle Being brittle can shatter cause small sharp slivers slivers can penetrate skin ease will work themselves back surface Once under skin slivers least minor irritant worst danger heart lungs work way bloodstream Modern boron fiber pretty well behaved will break cleanly bent sharply pliers must take care dispose scrap ends broken off Little pieces boron cannot left laying about worktable floor Two ways discussed ensure proper disposal boron scrap ends have small bottle table repository boron scrap work material As break end off pliers continue grip pliers drop bottle Two place masking tape end boron trimming After breaking off end tape attached dispose wastepaper basket Bostonian year Manhattan Cabin became official event rush set records four AMA ceiling categories three age classes uni fies activity standard rules Now Ed Whittens New York door Times get set official rules Bostonian Cabin 1 Maximum projected wingspans 16 maximum wing chord 3 2 Maximum propellers diameter 6 3 Power limited rubber motors 4 All surfaces double-covered 5 Minimum weight rubber motors 7 grams 6 Maximum overall length 14 excluding propellers 7 Fuselage must contain exceed theoretical box measuring 1 x 2A x 3 longerons must both supNow Kit Form Save easy assemble 4 channel kit expandable 71 OnlyS 7995 service parts available past manufactured EK Logitrol radios including Logitrol manufactured Cirrus Tower Hobby Lobby radios Free servo reversing Hobby Lobby radios included service work FCS-4 Four Channel Radio Wider body ends aching shoulder muscles Angled easier monitering battery charge Designed easily accept new frequencies Servo reversing simply reversing plug Adjustable stick tension Inexpensive replacement servos V 4UOmAH battery pack I600mAH ft 1200mAH extral Expandable port motor form exceed box requirement No motor sticks allowed Fuselage must have forward windshield window side least square inch area 8 Landing Gear must fixed least two wheels Y4-in minimum diam eter rigid enough successfully sup port model hand-glided landing 9 Rise Off Ground least two wheels required takeoffs official flights 10 Charisma FactorThe judge rates model model appeals him based construction neatness scalelike details unique features design etc 100 rating up 130 used Two models may given same rating models rated against other against 100 130 scale 11 An unlimited number flights allowed total full seconds three best flights multiplied Charisma Factor determining models score 12 More model may entered prize entrant will awarded Ed Whitten has said Bostonian Cabin models Flying Scale models . except no full-sized mancarrying version Two photos models built some time back John Triolo shown perhaps can see what Ed means might notice design feature two modelsJohn clever ly arranged designs accommodate full-length motors best rubber usage Bedford reg ulars sessions Bedford Boys Ranch Bedford TX Al Backstrom Frisco TX Al flies some Indoor Scale flying wing models really fun $11995 wIth large lInear serve $12995 maK rotary servos Send 8Sf let cemplete catuleg 509 4S72 122 watch model launching photo flying-plank style use nothing except reflex airfoil stability model doesnt seem lack stability can hit ceiling recover very little loss alti tudefar better Scale models better some serious Indoor models Bud Tenny PO Box 545 Richardson TX 75080 FF DurationlMeuser Continued page 73 inner tip wing panels angles B D angles need know setting ribs adjacent dihe dral breaks sanding proper angle dimensions m h amounts prop up end panel gluing end another scenarios involving considerable trial-and-error modelers arrive final dimensions wings Ferrers Second Notion seems pretty good what model designer would really like 1 establish semi-span tip angle 2 establish ratio c d 3 invoke Ferrers First Notion about ellipse business other numbers interest should fall out onto floor ratio c d Well suppose decide rib spacing uniform throughout wing previous experience perhaps simply wild guess decide tip panel should have six rib spaces inner panel should have 10 c/d John calls R simply 10/6 Continued page 172 September 1984 169 Full Command Systems 908 E Rosewood Spokane WA 99208
Edition: Model Aviation - 1984/09
Page Numbers: 68, 69, 70, 167, 168, 169
right T dral angle ssary icarly ni cue frames con d Fiber insulatioi fine F ers quite ea enough hold nile hties i out sh j us wv scrappiec coup solderina 4th aCD& tfl n use e tli WOOd Loacur ealsa wil water wood hold uom age ss P-30 rubberpowered model can interesting change pace fairly small size re quired plastic prop can built quickly inex pensively text provides some ex cellent information have modest ex perience Clarence Mather work fine used properly favor phatic resins such Titebond soak wood form very strong joint dont shrink dry slowly enough pieces can fitted carefully Such glues quite thick usually squeeze some small bottle add few drops water weakens glue somewhat still plenty strong slightly-diluted glue will keep very lone mix small por tion time Coatboth edges joint allow glue soak several seconds As pieces joined some glue will squeeze out Use damp brush immediately remove much ex cess possible glue side frame dry remove pins leave frame plan Lay piece Saran Wrap over assemble second frame top first produce matched pair frames removed plan separated drill holes rear motor already done run glue ring around hole inside strengthen balsa number holes made because rubber varies thick ness batch batch sometimes varies different places within strip times unwound motor must slack freewheeling unit func tion dont want too much slack multiple holes allow adjustment motor proper amount slack Utilize two jig formers assemble two side frames box Jig farmers simply rectangular pieces sheet balsa cut fit between frames glued lightly place hold frames position adding fuse lage cross members jig formers cut free Lay fuselage sides members sheeted areas Cut flat inside facing up Glue jig couple observation holes sheeting formers vertically Lay second bottom rear peg holes fuselage side atop jig formers taking wood dowels used medical swab sticks care box formed square good size wing stab hold ends sides Add cross down rubberbands Pieces A2-in piano September 1984 69 model features tip dihedral strong lateral stability forward dethermalizer fuse mounting just behind wing shows clearly above picture moderately heavy plastic prop combined lightweight rear end allows wing placed well forwardand long stable efficient rear moment arm results -SIZE PLANS AVAILABLE. SEE PAGE 180 33 HARD F ISE 1/B FOR WASHOUrCENTER PANEL IS FLAYWING SPAR JOINTND WASHOUT 2P DIHEDRAL THREE LAMINATIONS OF 1132x1S.STAB EDGES AND SPAR HARD 11BP ASTIC PROP TWO LAMINATIONS 132xV16 /POWER-THREE DOPS OFPECK SHAFT IIII18 RUBBER OGRAMSBEARING IIIIISLIGHT ROH RUDDER HRUS XXIIIIII332SHEE BOX FUSE 1/4 TUBE NCEBA SW-A ERNATE NOSE A-WIRE GUIDE4 MONOFILAMLNT - ---- HIN PIANO WIRE EYE-/ -STAB1/B TUBEN3/32 HARD BALSA FRAMESCROCKET p_, -- REHODK- SMALL DOWELHDOK II - -i7CTh -7 FUSE OMITTED STAB RIBWING CENTERWING TIP ALLARE132FIRMBALSA911112 SWEET P-3D CAtA wire would also job wire harder keep glued place inner part nose plug must fit snugly front fuselage may fall out during glide ruin flight Some modelers glue couple small hooks fuselage cut groove nose block loop rubberband around block hold place PeckPolymers sells nose bearings prop shaft combos well plastic props P-30s work fine stocked hobby shops fuselage side view shows detachable rubber hook used winding tube can employed protect fuselage motor breakage during winding sketched cast aluminum hook sold Jim Crocket Various types homemade modelers simpler unit shown cross-sec tion sketch modelers wanting wind motors directly detachable type recommended because sooner later motor will break rubber wound full turns As P-30 very light model can soar quite well drag freewheeling prop Unless plan fly early mornings late eve nings dethernializer definitely needed shown plan reduce fire hazard flying fields covered dry grass brusha fire just waiting start Fortunately fire isnt likely start unless igniter down low dry material dense fuse located atop fuselage nearly impossible dethermal izer line tied eye rear fuselage brought forward over top stab Thus line fully exposed easy install adjust Al Ulm Orbiteers Club came up variation believe works fine free end snuffer tube cut projection sticking out act hook forward end dethermalizer band fine jewelers saw does job well Note projection blends rest tube rounded curve strength Dont put larger loads thin aluminumthe rubberbands have stretched twice length Glue snuffer tube fuse lage sheeting very securely fill area below tube piece Y6 balsa piano wire side hooks solidly glued piece whole unit can secured piece silk gauze glued overall dethermalizer line installed until after fuselage completed Wing Pick piece firm sheet /32 balsa ribs Cut 14 rectangular pieces bit larger wing center panel ribs Trace rib pattern two ribs place end stack pieces Pin stack together shape stack rib pattern tapered tip panels cut out eight rectangular pieces trace largest rib pattern end smallest rib another Stack pieces patContinued page 167 70 Model Aviation gn makes use classic stick-andtissue construction system produces very good strengfth keeping weight weii P-30 event specificatIons 020 Replica Fred Emmert 1200 first second Brad Levine 1049 third Dick Lyons 839 fourth Bill Valentine 806 fifth Bob Sunberg 759 Cabin won Hal Cover time 916 Larry Clark second 850 third Leon Nadol sky 742 Al Heinrik fourth 635 Bill Booth 5th 606 B Cabin saw Sal Taibi again first place fine time 1414 C Meyerscough second 1134 third B Aveustus 928 Dick Lyons fifth 853 C Gas exciting Doug Galbreath totaled amazing 4942 before finally missing max used OS VRB RC engine modified Dukie plane 101 aspect ratio weighed 43 oz say climbed rapidly would putting mildly Ralph Prey totaled 2947 second place third Dan Keegan 2205 Scott Reid fourth 1934 Wes Funk fifth 1405 Doug won Ocie Randall Trophy fourth time winning flight time A-B Nostalgia again proved later-year models fly longer bet ter power Dan Keegan maxed out 2729 first Jack Moreland maxed out 2622 second Terry Thorkild son maxed out 2343 Jim Adams fourth 1301 David Martin fifth 835 Saturday Night-Flying event won Travis Hunter 2954 Chas Dorsett second 1430 Bill Ruff third 1428 Scott Reid fourth 1405 Forrest Staines fifth 1153 Long before 6 oclock Sunday morn ing 1AA Texaco regular Tex aco models could heard droning away good warm air early starting get hot Sal Taibi put up AA Texaco total 4535 easy win over Bob Dittmars second-place 3106 Jim Adams third 2625 Bill Booth fourth 2047 fifth CJ Jordan 1628 regular Texaco event Bill Cohen ran away field flight 2932 almost double secondplace RB McKennas 1748 Jim Crocket third 1341 Larry Clark fourth time 1333 Brad Levine fifth 1241 C-D Nostalgia surprisingly no max outs RB McKenna won 1437 Dan Keegan second 1058 third Al Heitick 940 Hal Cover managed fourth D Gas found big Doug Galbreath max ing out 2325 Travis Hunter sec ond also maxing 2007 Dan Keegan third 1452 Bill Ruff fourth 1340 fifth Scott Reid 1320 Coupe dHiver another Bob-White-maxing-out contests total 1111 handily beat Joe Foster 1025 second Paul Masterson England third maxing 695 Ding BIGE SpEcihcATiofts Wisoypoow64 A.01206ooi0 Lossysh10 AwIAISywwSMcM Wolyb1 lb woody oo Ily P0EURA 2ENOAH ow QUADRA oy6oO P100 opociFy wlich o,o3oo 0 bol, 8w8 wlo odo8 voc ki Font. Ey bcld oooofwo bow owdwy MI bolwood 08 plywood poc0 wAs pouloo 08ws poolmd loll bs8s 81 odbooco0lcodRpbc IJMOOA wl% 0Ochso ME llcpww 08 IwwllAAo ocp~ SlAy Zwohol 7-bol sob 5l895 RowI poop dUll ip 1965 dOib so, shook ooSLOOow wood olcwlwcsd bock plo, 51895 Zarate fourth 659 Jim Quinn fifth 582 B Gas some reason another scored FAT fashion Bill Morgan maxed-out 1647 first place Don Berry maxed second place 1140 Jack Moreland maxed 960 sec third place Jon DeFries fourth 896 sec Mike Steam fifth 856 no scores announced A-l Towline Payload Electric ever winners follows A-i won Martyn Cowley sec ond Mike Johnson third Steve Geraghty fourth Antonio Abauza fifth Bill Booth Jr Payload first Terry Thorkildson sec ond Gus Sunberg third Erik Strengell fourth John Bonang fifth Ron Wittman Electric won Blane Beron Rawdon second Lynne Wainfain third Jim Ogg fourth Jim McDermoth fifth Tony Naccarato Last certainly least Grand Champion Marc Sisk traveled way Davenport IA really no wonder wonhe helper pretty wife Hattie Team Championship won San Diego Club #2 comprised Cezar Banks Paul Altonhoff guy gets Tomy timers around Bill Burke Joe Norcross announced after con test will Contest Director next year will flying hot day contest Sunday FLYING NEAR Al RPORTS BE CAREFUL PROTECT YOUR RIGHTTO FLY Us qoood 608111 wyl SIC F oow lo owls. Sd lowdiwo 05 locoslow pcoo.d 608 coo. bow oloo Ssd dock Ply loll p,.o *16 pow, TOOPO loclcdollIoosdosow oocopwIlwIooloowobly ThE NEW UPDATED E & L ZENOAN ENqINE PRECISE RIIJI VibuAhiaft p & L opdosod Iooo.co loclod bolSociwO iwllSOoOis cowpoOoiow d0 odlfid woMb, bopoocod Aiip cowboooboo ooood 46 owd cowol oob shoosol lbwboco jdId Spocdicoslooso 226 CID 2cyclo ydwooo p0Od OwiAs. 105000855 Polk bcobwy *010 piw owd powood posoonwy Sowooshi Mocb I, ciboosiow show botocod QUADRA powofoItPoowoOO lUbOpsop os 7500 RPIOI Dooblo boll booIwA cowkolAf Sold-,oo lOobolo 0 polOss WOiOIOS4 lb20 Eooylsoodssoosowy MASTERCARD Sweet P-3OlMather Continued page 70 tern end other pattern other Shape stack rib pat terns place first rib left panel second rib right panel continue alternating placement Cut strips 1/32 sheet tips Make inch longer min imum Soak strips water overnight bend same manner fuselage longerons dont like make rounded tips simply square off model will fly well Laminat ed tips such light strong Assemble wing center panel plan Use hardest strips leading edge top spars Note spars extend beyond last rib lapped joint can formed tip panel spars Such joint much stronger butt joints Usually bottom spars added after frame removed board pin surface flat again glue sets Assemble tip panels spars make easier shape joints right panel flat left panel washed out means trailing edge raised whole panel twisted So prop up trailing edge left tip panel being assembled ribs glued twist built Pin completed center panel board set tips position propped up correct dihedral angle Cut tip panel leading trailing edges angle mate wing edges Dont fret joints perfect though advantages aliphatic glue can brushed joint gaps form strong bond Observe panels rear right has no twist left trailing edge September1984 167 VISA B & L Manufacturin1 AbTl Losodo Lw, Scossodolo Awoowo 65251 602 41-OhS Tail surfaces outlines stabili zer fin made hard /16 balsa course /32 balsa can substituted dont like working smaller sizes hard /I6 available However hard /16 makes strong light surface stab ribs made same fash ion wing ribs fin has symmet rical airfoil requires additional step As rib cut curved left side sliced off portion shown line top view fin assem bled over plan fin re moved plan left sides ribs glued back fin airfoil critical given some thickness resist warping effective flat plate Coverlag/finishing preparation covering sand parts fine sand paper remove bumps rough spots coat wood parts will contact covering tissue two three coats clear dope dope step can fairly thick Again sand lightly fine sandpaper Lay piece tissue over area covered brush dope thinner liber ally over wood structure through tissue thinner will penetrate porous tissue soften dope will adhere tissue Check loose areas reapply thinner Cover fuselage before fin glued cover fin after glued fuselage area fuselage encloses tne motor given two layers cross grained tissue makes fuselage very rigid Apply layer water-shrink tissue apply coat finishing clear dope apply second layer finishing clear dope should rather thin Three parts thinner part dope good like use nitrate dope add three drops castor oil per ounce thinned mixture leaves tissue bit flexibility reduces amount shrinking some what Two coats will suffice Glue fin fuselage just little offset right turn cover water-shrink apply dope Check carefully rear about /32 left fin side should visible right During finishing process warp may have developed Boil water kettle having spout place warped part steam twist opposite direc tion remove warp Flying Weigh out 10 grams A-in rub ber strip make motor three loops six strands Make secure knot thoroughly soaking ends saliva tying overhand knot Pull tight near breaking point rub ber Again soak ends tie another square knot upon first Install motor model utilizing peg hole leaves motor slightly slack Aluminum tubing outside diameter will work rear peg stretch rubber hard fullwinds effort sure slide piece /6 piano wire larger through tube first Assemble model using rubberbands stretched about twice atrest length Slip stab under monofilament connect rubberband peg run through hook stab onto second peg stab will pull up dethermalizer posi tion Place small rubberband over snuffer tube end straddle fuse loop under side hooks connect hook end monofilament pushing rear stab down Check balance point model add weight front rear necessary achieve balance 1 ward trailing edge Observe model rear stab should parallel center section wing though right tip can slightly high flight testing lubricate motor motor placed small plastic bag rubber lube poured inside will less mess Fudo Takagi first suggested procedure believe Try locate area covered weeds grass testing disadvantage freewheeling propellers blade can snap off during fast landing hard surface Hand-glide model pointed slightly nose-down coming breeze model glides quite slowly because its light weight prop drag violent diving stalling occurs check wing stab angles balance point OK try different launch speed diving persists shim up rear stab conversely put shim under front stab model stalls Strips IBM tab cards make good thin shims Most models require some downthrust avoid power stalls ticipate putting A2-in piece balsa between top nose block fuselage Wind motor about 100 turns launch slightly nose-high position Ideally model will climb few feet glide down large right turn model goes straight dur ing both parts flight steam little turn finor glue small tab trailing edge fin up stab wont hit power phase flight straight shim left side nose block glide phase flight too straight place shims between right side fuselage stab stab tilt Power stalling can corrected additional downthrust side thrust As flight pattern smooths out crease number turns Eventually model should climb steeply slight right bank circle Try changing down side thrust small amounts get maximum altitude models climbers too much right rudder right thrust model may drop right wing during first part climb fine balance needed removing right rudder straightens out glide too much just add stab tilt fully stretched wound motor will take about 1000 turns de 88 Model Aviation up about Lay tip spars posi tion angle ends form good joint center panel spars As glued check panels unwanted warps pending upon type rubber used prop run typically 20 25 seconds though model gets quite high will come down fast unless ther mal contest flying practice picking good air well trimming model Good Flying FF IndoorlTenny Continued page 71 new high-tech material requires some special handling and/or building techniques race develop reliable low-weight building methods us ing materials Help using carbon boron fibers new plastic films other materials improve models tell us about word warning Howard Haupt editor El Torbellino newsletter San Diego Orbiteers very recent issue printed following warning Boron glass-like material can very brittle Being brittle can shatter cause small sharp slivers slivers can penetrate skin ease will work themselves back surface Once under skin slivers least minor irritant worst danger heart lungs work way bloodstream Modern boron fiber pretty well behaved will break cleanly bent sharply pliers must take care dispose scrap ends broken off Little pieces boron cannot left laying about worktable floor Two ways discussed ensure proper disposal boron scrap ends have small bottle table repository boron scrap work material As break end off pliers continue grip pliers drop bottle Two place masking tape end boron trimming After breaking off end tape attached dispose wastepaper basket Bostonian year Manhattan Cabin became official event rush set records four AMA ceiling categories three age classes uni fies activity standard rules Now Ed Whittens New York door Times get set official rules Bostonian Cabin 1 Maximum projected wingspans 16 maximum wing chord 3 2 Maximum propellers diameter 6 3 Power limited rubber motors 4 All surfaces double-covered 5 Minimum weight rubber motors 7 grams 6 Maximum overall length 14 excluding propellers 7 Fuselage must contain exceed theoretical box measuring 1 x 2A x 3 longerons must both supNow Kit Form Save easy assemble 4 channel kit expandable 71 OnlyS 7995 service parts available past manufactured EK Logitrol radios including Logitrol manufactured Cirrus Tower Hobby Lobby radios Free servo reversing Hobby Lobby radios included service work FCS-4 Four Channel Radio Wider body ends aching shoulder muscles Angled easier monitering battery charge Designed easily accept new frequencies Servo reversing simply reversing plug Adjustable stick tension Inexpensive replacement servos V 4UOmAH battery pack I600mAH ft 1200mAH extral Expandable port motor form exceed box requirement No motor sticks allowed Fuselage must have forward windshield window side least square inch area 8 Landing Gear must fixed least two wheels Y4-in minimum diam eter rigid enough successfully sup port model hand-glided landing 9 Rise Off Ground least two wheels required takeoffs official flights 10 Charisma FactorThe judge rates model model appeals him based construction neatness scalelike details unique features design etc 100 rating up 130 used Two models may given same rating models rated against other against 100 130 scale 11 An unlimited number flights allowed total full seconds three best flights multiplied Charisma Factor determining models score 12 More model may entered prize entrant will awarded Ed Whitten has said Bostonian Cabin models Flying Scale models . except no full-sized mancarrying version Two photos models built some time back John Triolo shown perhaps can see what Ed means might notice design feature two modelsJohn clever ly arranged designs accommodate full-length motors best rubber usage Bedford reg ulars sessions Bedford Boys Ranch Bedford TX Al Backstrom Frisco TX Al flies some Indoor Scale flying wing models really fun $11995 wIth large lInear serve $12995 maK rotary servos Send 8Sf let cemplete catuleg 509 4S72 122 watch model launching photo flying-plank style use nothing except reflex airfoil stability model doesnt seem lack stability can hit ceiling recover very little loss alti tudefar better Scale models better some serious Indoor models Bud Tenny PO Box 545 Richardson TX 75080 FF DurationlMeuser Continued page 73 inner tip wing panels angles B D angles need know setting ribs adjacent dihe dral breaks sanding proper angle dimensions m h amounts prop up end panel gluing end another scenarios involving considerable trial-and-error modelers arrive final dimensions wings Ferrers Second Notion seems pretty good what model designer would really like 1 establish semi-span tip angle 2 establish ratio c d 3 invoke Ferrers First Notion about ellipse business other numbers interest should fall out onto floor ratio c d Well suppose decide rib spacing uniform throughout wing previous experience perhaps simply wild guess decide tip panel should have six rib spaces inner panel should have 10 c/d John calls R simply 10/6 Continued page 172 September 1984 169 Full Command Systems 908 E Rosewood Spokane WA 99208
Edition: Model Aviation - 1984/09
Page Numbers: 68, 69, 70, 167, 168, 169
right T dral angle ssary icarly ni cue frames con d Fiber insulatioi fine F ers quite ea enough hold nile hties i out sh j us wv scrappiec coup solderina 4th aCD& tfl n use e tli WOOd Loacur ealsa wil water wood hold uom age ss P-30 rubberpowered model can interesting change pace fairly small size re quired plastic prop can built quickly inex pensively text provides some ex cellent information have modest ex perience Clarence Mather work fine used properly favor phatic resins such Titebond soak wood form very strong joint dont shrink dry slowly enough pieces can fitted carefully Such glues quite thick usually squeeze some small bottle add few drops water weakens glue somewhat still plenty strong slightly-diluted glue will keep very lone mix small por tion time Coatboth edges joint allow glue soak several seconds As pieces joined some glue will squeeze out Use damp brush immediately remove much ex cess possible glue side frame dry remove pins leave frame plan Lay piece Saran Wrap over assemble second frame top first produce matched pair frames removed plan separated drill holes rear motor already done run glue ring around hole inside strengthen balsa number holes made because rubber varies thick ness batch batch sometimes varies different places within strip times unwound motor must slack freewheeling unit func tion dont want too much slack multiple holes allow adjustment motor proper amount slack Utilize two jig formers assemble two side frames box Jig farmers simply rectangular pieces sheet balsa cut fit between frames glued lightly place hold frames position adding fuse lage cross members jig formers cut free Lay fuselage sides members sheeted areas Cut flat inside facing up Glue jig couple observation holes sheeting formers vertically Lay second bottom rear peg holes fuselage side atop jig formers taking wood dowels used medical swab sticks care box formed square good size wing stab hold ends sides Add cross down rubberbands Pieces A2-in piano September 1984 69 model features tip dihedral strong lateral stability forward dethermalizer fuse mounting just behind wing shows clearly above picture moderately heavy plastic prop combined lightweight rear end allows wing placed well forwardand long stable efficient rear moment arm results -SIZE PLANS AVAILABLE. SEE PAGE 180 33 HARD F ISE 1/B FOR WASHOUrCENTER PANEL IS FLAYWING SPAR JOINTND WASHOUT 2P DIHEDRAL THREE LAMINATIONS OF 1132x1S.STAB EDGES AND SPAR HARD 11BP ASTIC PROP TWO LAMINATIONS 132xV16 /POWER-THREE DOPS OFPECK SHAFT IIII18 RUBBER OGRAMSBEARING IIIIISLIGHT ROH RUDDER HRUS XXIIIIII332SHEE BOX FUSE 1/4 TUBE NCEBA SW-A ERNATE NOSE A-WIRE GUIDE4 MONOFILAMLNT - ---- HIN PIANO WIRE EYE-/ -STAB1/B TUBEN3/32 HARD BALSA FRAMESCROCKET p_, -- REHODK- SMALL DOWELHDOK II - -i7CTh -7 FUSE OMITTED STAB RIBWING CENTERWING TIP ALLARE132FIRMBALSA911112 SWEET P-3D CAtA wire would also job wire harder keep glued place inner part nose plug must fit snugly front fuselage may fall out during glide ruin flight Some modelers glue couple small hooks fuselage cut groove nose block loop rubberband around block hold place PeckPolymers sells nose bearings prop shaft combos well plastic props P-30s work fine stocked hobby shops fuselage side view shows detachable rubber hook used winding tube can employed protect fuselage motor breakage during winding sketched cast aluminum hook sold Jim Crocket Various types homemade modelers simpler unit shown cross-sec tion sketch modelers wanting wind motors directly detachable type recommended because sooner later motor will break rubber wound full turns As P-30 very light model can soar quite well drag freewheeling prop Unless plan fly early mornings late eve nings dethernializer definitely needed shown plan reduce fire hazard flying fields covered dry grass brusha fire just waiting start Fortunately fire isnt likely start unless igniter down low dry material dense fuse located atop fuselage nearly impossible dethermal izer line tied eye rear fuselage brought forward over top stab Thus line fully exposed easy install adjust Al Ulm Orbiteers Club came up variation believe works fine free end snuffer tube cut projection sticking out act hook forward end dethermalizer band fine jewelers saw does job well Note projection blends rest tube rounded curve strength Dont put larger loads thin aluminumthe rubberbands have stretched twice length Glue snuffer tube fuse lage sheeting very securely fill area below tube piece Y6 balsa piano wire side hooks solidly glued piece whole unit can secured piece silk gauze glued overall dethermalizer line installed until after fuselage completed Wing Pick piece firm sheet /32 balsa ribs Cut 14 rectangular pieces bit larger wing center panel ribs Trace rib pattern two ribs place end stack pieces Pin stack together shape stack rib pattern tapered tip panels cut out eight rectangular pieces trace largest rib pattern end smallest rib another Stack pieces patContinued page 167 70 Model Aviation gn makes use classic stick-andtissue construction system produces very good strengfth keeping weight weii P-30 event specificatIons 020 Replica Fred Emmert 1200 first second Brad Levine 1049 third Dick Lyons 839 fourth Bill Valentine 806 fifth Bob Sunberg 759 Cabin won Hal Cover time 916 Larry Clark second 850 third Leon Nadol sky 742 Al Heinrik fourth 635 Bill Booth 5th 606 B Cabin saw Sal Taibi again first place fine time 1414 C Meyerscough second 1134 third B Aveustus 928 Dick Lyons fifth 853 C Gas exciting Doug Galbreath totaled amazing 4942 before finally missing max used OS VRB RC engine modified Dukie plane 101 aspect ratio weighed 43 oz say climbed rapidly would putting mildly Ralph Prey totaled 2947 second place third Dan Keegan 2205 Scott Reid fourth 1934 Wes Funk fifth 1405 Doug won Ocie Randall Trophy fourth time winning flight time A-B Nostalgia again proved later-year models fly longer bet ter power Dan Keegan maxed out 2729 first Jack Moreland maxed out 2622 second Terry Thorkild son maxed out 2343 Jim Adams fourth 1301 David Martin fifth 835 Saturday Night-Flying event won Travis Hunter 2954 Chas Dorsett second 1430 Bill Ruff third 1428 Scott Reid fourth 1405 Forrest Staines fifth 1153 Long before 6 oclock Sunday morn ing 1AA Texaco regular Tex aco models could heard droning away good warm air early starting get hot Sal Taibi put up AA Texaco total 4535 easy win over Bob Dittmars second-place 3106 Jim Adams third 2625 Bill Booth fourth 2047 fifth CJ Jordan 1628 regular Texaco event Bill Cohen ran away field flight 2932 almost double secondplace RB McKennas 1748 Jim Crocket third 1341 Larry Clark fourth time 1333 Brad Levine fifth 1241 C-D Nostalgia surprisingly no max outs RB McKenna won 1437 Dan Keegan second 1058 third Al Heitick 940 Hal Cover managed fourth D Gas found big Doug Galbreath max ing out 2325 Travis Hunter sec ond also maxing 2007 Dan Keegan third 1452 Bill Ruff fourth 1340 fifth Scott Reid 1320 Coupe dHiver another Bob-White-maxing-out contests total 1111 handily beat Joe Foster 1025 second Paul Masterson England third maxing 695 Ding BIGE SpEcihcATiofts Wisoypoow64 A.01206ooi0 Lossysh10 AwIAISywwSMcM Wolyb1 lb woody oo Ily P0EURA 2ENOAH ow QUADRA oy6oO P100 opociFy wlich o,o3oo 0 bol, 8w8 wlo odo8 voc ki Font. Ey bcld oooofwo bow owdwy MI bolwood 08 plywood poc0 wAs pouloo 08ws poolmd loll bs8s 81 odbooco0lcodRpbc IJMOOA wl% 0Ochso ME llcpww 08 IwwllAAo ocp~ SlAy Zwohol 7-bol sob 5l895 RowI poop dUll ip 1965 dOib so, shook ooSLOOow wood olcwlwcsd bock plo, 51895 Zarate fourth 659 Jim Quinn fifth 582 B Gas some reason another scored FAT fashion Bill Morgan maxed-out 1647 first place Don Berry maxed second place 1140 Jack Moreland maxed 960 sec third place Jon DeFries fourth 896 sec Mike Steam fifth 856 no scores announced A-l Towline Payload Electric ever winners follows A-i won Martyn Cowley sec ond Mike Johnson third Steve Geraghty fourth Antonio Abauza fifth Bill Booth Jr Payload first Terry Thorkildson sec ond Gus Sunberg third Erik Strengell fourth John Bonang fifth Ron Wittman Electric won Blane Beron Rawdon second Lynne Wainfain third Jim Ogg fourth Jim McDermoth fifth Tony Naccarato Last certainly least Grand Champion Marc Sisk traveled way Davenport IA really no wonder wonhe helper pretty wife Hattie Team Championship won San Diego Club #2 comprised Cezar Banks Paul Altonhoff guy gets Tomy timers around Bill Burke Joe Norcross announced after con test will Contest Director next year will flying hot day contest Sunday FLYING NEAR Al RPORTS BE CAREFUL PROTECT YOUR RIGHTTO FLY Us qoood 608111 wyl SIC F oow lo owls. Sd lowdiwo 05 locoslow pcoo.d 608 coo. bow oloo Ssd dock Ply loll p,.o *16 pow, TOOPO loclcdollIoosdosow oocopwIlwIooloowobly ThE NEW UPDATED E & L ZENOAN ENqINE PRECISE RIIJI VibuAhiaft p & L opdosod Iooo.co loclod bolSociwO iwllSOoOis cowpoOoiow d0 odlfid woMb, bopoocod Aiip cowboooboo ooood 46 owd cowol oob shoosol lbwboco jdId Spocdicoslooso 226 CID 2cyclo ydwooo p0Od OwiAs. 105000855 Polk bcobwy *010 piw owd powood posoonwy Sowooshi Mocb I, ciboosiow show botocod QUADRA powofoItPoowoOO lUbOpsop os 7500 RPIOI Dooblo boll booIwA cowkolAf Sold-,oo lOobolo 0 polOss WOiOIOS4 lb20 Eooylsoodssoosowy MASTERCARD Sweet P-3OlMather Continued page 70 tern end other pattern other Shape stack rib pat terns place first rib left panel second rib right panel continue alternating placement Cut strips 1/32 sheet tips Make inch longer min imum Soak strips water overnight bend same manner fuselage longerons dont like make rounded tips simply square off model will fly well Laminat ed tips such light strong Assemble wing center panel plan Use hardest strips leading edge top spars Note spars extend beyond last rib lapped joint can formed tip panel spars Such joint much stronger butt joints Usually bottom spars added after frame removed board pin surface flat again glue sets Assemble tip panels spars make easier shape joints right panel flat left panel washed out means trailing edge raised whole panel twisted So prop up trailing edge left tip panel being assembled ribs glued twist built Pin completed center panel board set tips position propped up correct dihedral angle Cut tip panel leading trailing edges angle mate wing edges Dont fret joints perfect though advantages aliphatic glue can brushed joint gaps form strong bond Observe panels rear right has no twist left trailing edge September1984 167 VISA B & L Manufacturin1 AbTl Losodo Lw, Scossodolo Awoowo 65251 602 41-OhS Tail surfaces outlines stabili zer fin made hard /16 balsa course /32 balsa can substituted dont like working smaller sizes hard /I6 available However hard /16 makes strong light surface stab ribs made same fash ion wing ribs fin has symmet rical airfoil requires additional step As rib cut curved left side sliced off portion shown line top view fin assem bled over plan fin re moved plan left sides ribs glued back fin airfoil critical given some thickness resist warping effective flat plate Coverlag/finishing preparation covering sand parts fine sand paper remove bumps rough spots coat wood parts will contact covering tissue two three coats clear dope dope step can fairly thick Again sand lightly fine sandpaper Lay piece tissue over area covered brush dope thinner liber ally over wood structure through tissue thinner will penetrate porous tissue soften dope will adhere tissue Check loose areas reapply thinner Cover fuselage before fin glued cover fin after glued fuselage area fuselage encloses tne motor given two layers cross grained tissue makes fuselage very rigid Apply layer water-shrink tissue apply coat finishing clear dope apply second layer finishing clear dope should rather thin Three parts thinner part dope good like use nitrate dope add three drops castor oil per ounce thinned mixture leaves tissue bit flexibility reduces amount shrinking some what Two coats will suffice Glue fin fuselage just little offset right turn cover water-shrink apply dope Check carefully rear about /32 left fin side should visible right During finishing process warp may have developed Boil water kettle having spout place warped part steam twist opposite direc tion remove warp Flying Weigh out 10 grams A-in rub ber strip make motor three loops six strands Make secure knot thoroughly soaking ends saliva tying overhand knot Pull tight near breaking point rub ber Again soak ends tie another square knot upon first Install motor model utilizing peg hole leaves motor slightly slack Aluminum tubing outside diameter will work rear peg stretch rubber hard fullwinds effort sure slide piece /6 piano wire larger through tube first Assemble model using rubberbands stretched about twice atrest length Slip stab under monofilament connect rubberband peg run through hook stab onto second peg stab will pull up dethermalizer posi tion Place small rubberband over snuffer tube end straddle fuse loop under side hooks connect hook end monofilament pushing rear stab down Check balance point model add weight front rear necessary achieve balance 1 ward trailing edge Observe model rear stab should parallel center section wing though right tip can slightly high flight testing lubricate motor motor placed small plastic bag rubber lube poured inside will less mess Fudo Takagi first suggested procedure believe Try locate area covered weeds grass testing disadvantage freewheeling propellers blade can snap off during fast landing hard surface Hand-glide model pointed slightly nose-down coming breeze model glides quite slowly because its light weight prop drag violent diving stalling occurs check wing stab angles balance point OK try different launch speed diving persists shim up rear stab conversely put shim under front stab model stalls Strips IBM tab cards make good thin shims Most models require some downthrust avoid power stalls ticipate putting A2-in piece balsa between top nose block fuselage Wind motor about 100 turns launch slightly nose-high position Ideally model will climb few feet glide down large right turn model goes straight dur ing both parts flight steam little turn finor glue small tab trailing edge fin up stab wont hit power phase flight straight shim left side nose block glide phase flight too straight place shims between right side fuselage stab stab tilt Power stalling can corrected additional downthrust side thrust As flight pattern smooths out crease number turns Eventually model should climb steeply slight right bank circle Try changing down side thrust small amounts get maximum altitude models climbers too much right rudder right thrust model may drop right wing during first part climb fine balance needed removing right rudder straightens out glide too much just add stab tilt fully stretched wound motor will take about 1000 turns de 88 Model Aviation up about Lay tip spars posi tion angle ends form good joint center panel spars As glued check panels unwanted warps pending upon type rubber used prop run typically 20 25 seconds though model gets quite high will come down fast unless ther mal contest flying practice picking good air well trimming model Good Flying FF IndoorlTenny Continued page 71 new high-tech material requires some special handling and/or building techniques race develop reliable low-weight building methods us ing materials Help using carbon boron fibers new plastic films other materials improve models tell us about word warning Howard Haupt editor El Torbellino newsletter San Diego Orbiteers very recent issue printed following warning Boron glass-like material can very brittle Being brittle can shatter cause small sharp slivers slivers can penetrate skin ease will work themselves back surface Once under skin slivers least minor irritant worst danger heart lungs work way bloodstream Modern boron fiber pretty well behaved will break cleanly bent sharply pliers must take care dispose scrap ends broken off Little pieces boron cannot left laying about worktable floor Two ways discussed ensure proper disposal boron scrap ends have small bottle table repository boron scrap work material As break end off pliers continue grip pliers drop bottle Two place masking tape end boron trimming After breaking off end tape attached dispose wastepaper basket Bostonian year Manhattan Cabin became official event rush set records four AMA ceiling categories three age classes uni fies activity standard rules Now Ed Whittens New York door Times get set official rules Bostonian Cabin 1 Maximum projected wingspans 16 maximum wing chord 3 2 Maximum propellers diameter 6 3 Power limited rubber motors 4 All surfaces double-covered 5 Minimum weight rubber motors 7 grams 6 Maximum overall length 14 excluding propellers 7 Fuselage must contain exceed theoretical box measuring 1 x 2A x 3 longerons must both supNow Kit Form Save easy assemble 4 channel kit expandable 71 OnlyS 7995 service parts available past manufactured EK Logitrol radios including Logitrol manufactured Cirrus Tower Hobby Lobby radios Free servo reversing Hobby Lobby radios included service work FCS-4 Four Channel Radio Wider body ends aching shoulder muscles Angled easier monitering battery charge Designed easily accept new frequencies Servo reversing simply reversing plug Adjustable stick tension Inexpensive replacement servos V 4UOmAH battery pack I600mAH ft 1200mAH extral Expandable port motor form exceed box requirement No motor sticks allowed Fuselage must have forward windshield window side least square inch area 8 Landing Gear must fixed least two wheels Y4-in minimum diam eter rigid enough successfully sup port model hand-glided landing 9 Rise Off Ground least two wheels required takeoffs official flights 10 Charisma FactorThe judge rates model model appeals him based construction neatness scalelike details unique features design etc 100 rating up 130 used Two models may given same rating models rated against other against 100 130 scale 11 An unlimited number flights allowed total full seconds three best flights multiplied Charisma Factor determining models score 12 More model may entered prize entrant will awarded Ed Whitten has said Bostonian Cabin models Flying Scale models . except no full-sized mancarrying version Two photos models built some time back John Triolo shown perhaps can see what Ed means might notice design feature two modelsJohn clever ly arranged designs accommodate full-length motors best rubber usage Bedford reg ulars sessions Bedford Boys Ranch Bedford TX Al Backstrom Frisco TX Al flies some Indoor Scale flying wing models really fun $11995 wIth large lInear serve $12995 maK rotary servos Send 8Sf let cemplete catuleg 509 4S72 122 watch model launching photo flying-plank style use nothing except reflex airfoil stability model doesnt seem lack stability can hit ceiling recover very little loss alti tudefar better Scale models better some serious Indoor models Bud Tenny PO Box 545 Richardson TX 75080 FF DurationlMeuser Continued page 73 inner tip wing panels angles B D angles need know setting ribs adjacent dihe dral breaks sanding proper angle dimensions m h amounts prop up end panel gluing end another scenarios involving considerable trial-and-error modelers arrive final dimensions wings Ferrers Second Notion seems pretty good what model designer would really like 1 establish semi-span tip angle 2 establish ratio c d 3 invoke Ferrers First Notion about ellipse business other numbers interest should fall out onto floor ratio c d Well suppose decide rib spacing uniform throughout wing previous experience perhaps simply wild guess decide tip panel should have six rib spaces inner panel should have 10 c/d John calls R simply 10/6 Continued page 172 September 1984 169 Full Command Systems 908 E Rosewood Spokane WA 99208
Edition: Model Aviation - 1984/09
Page Numbers: 68, 69, 70, 167, 168, 169
right T dral angle ssary icarly ni cue frames con d Fiber insulatioi fine F ers quite ea enough hold nile hties i out sh j us wv scrappiec coup solderina 4th aCD& tfl n use e tli WOOd Loacur ealsa wil water wood hold uom age ss P-30 rubberpowered model can interesting change pace fairly small size re quired plastic prop can built quickly inex pensively text provides some ex cellent information have modest ex perience Clarence Mather work fine used properly favor phatic resins such Titebond soak wood form very strong joint dont shrink dry slowly enough pieces can fitted carefully Such glues quite thick usually squeeze some small bottle add few drops water weakens glue somewhat still plenty strong slightly-diluted glue will keep very lone mix small por tion time Coatboth edges joint allow glue soak several seconds As pieces joined some glue will squeeze out Use damp brush immediately remove much ex cess possible glue side frame dry remove pins leave frame plan Lay piece Saran Wrap over assemble second frame top first produce matched pair frames removed plan separated drill holes rear motor already done run glue ring around hole inside strengthen balsa number holes made because rubber varies thick ness batch batch sometimes varies different places within strip times unwound motor must slack freewheeling unit func tion dont want too much slack multiple holes allow adjustment motor proper amount slack Utilize two jig formers assemble two side frames box Jig farmers simply rectangular pieces sheet balsa cut fit between frames glued lightly place hold frames position adding fuse lage cross members jig formers cut free Lay fuselage sides members sheeted areas Cut flat inside facing up Glue jig couple observation holes sheeting formers vertically Lay second bottom rear peg holes fuselage side atop jig formers taking wood dowels used medical swab sticks care box formed square good size wing stab hold ends sides Add cross down rubberbands Pieces A2-in piano September 1984 69 model features tip dihedral strong lateral stability forward dethermalizer fuse mounting just behind wing shows clearly above picture moderately heavy plastic prop combined lightweight rear end allows wing placed well forwardand long stable efficient rear moment arm results -SIZE PLANS AVAILABLE. SEE PAGE 180 33 HARD F ISE 1/B FOR WASHOUrCENTER PANEL IS FLAYWING SPAR JOINTND WASHOUT 2P DIHEDRAL THREE LAMINATIONS OF 1132x1S.STAB EDGES AND SPAR HARD 11BP ASTIC PROP TWO LAMINATIONS 132xV16 /POWER-THREE DOPS OFPECK SHAFT IIII18 RUBBER OGRAMSBEARING IIIIISLIGHT ROH RUDDER HRUS XXIIIIII332SHEE BOX FUSE 1/4 TUBE NCEBA SW-A ERNATE NOSE A-WIRE GUIDE4 MONOFILAMLNT - ---- HIN PIANO WIRE EYE-/ -STAB1/B TUBEN3/32 HARD BALSA FRAMESCROCKET p_, -- REHODK- SMALL DOWELHDOK II - -i7CTh -7 FUSE OMITTED STAB RIBWING CENTERWING TIP ALLARE132FIRMBALSA911112 SWEET P-3D CAtA wire would also job wire harder keep glued place inner part nose plug must fit snugly front fuselage may fall out during glide ruin flight Some modelers glue couple small hooks fuselage cut groove nose block loop rubberband around block hold place PeckPolymers sells nose bearings prop shaft combos well plastic props P-30s work fine stocked hobby shops fuselage side view shows detachable rubber hook used winding tube can employed protect fuselage motor breakage during winding sketched cast aluminum hook sold Jim Crocket Various types homemade modelers simpler unit shown cross-sec tion sketch modelers wanting wind motors directly detachable type recommended because sooner later motor will break rubber wound full turns As P-30 very light model can soar quite well drag freewheeling prop Unless plan fly early mornings late eve nings dethernializer definitely needed shown plan reduce fire hazard flying fields covered dry grass brusha fire just waiting start Fortunately fire isnt likely start unless igniter down low dry material dense fuse located atop fuselage nearly impossible dethermal izer line tied eye rear fuselage brought forward over top stab Thus line fully exposed easy install adjust Al Ulm Orbiteers Club came up variation believe works fine free end snuffer tube cut projection sticking out act hook forward end dethermalizer band fine jewelers saw does job well Note projection blends rest tube rounded curve strength Dont put larger loads thin aluminumthe rubberbands have stretched twice length Glue snuffer tube fuse lage sheeting very securely fill area below tube piece Y6 balsa piano wire side hooks solidly glued piece whole unit can secured piece silk gauze glued overall dethermalizer line installed until after fuselage completed Wing Pick piece firm sheet /32 balsa ribs Cut 14 rectangular pieces bit larger wing center panel ribs Trace rib pattern two ribs place end stack pieces Pin stack together shape stack rib pattern tapered tip panels cut out eight rectangular pieces trace largest rib pattern end smallest rib another Stack pieces patContinued page 167 70 Model Aviation gn makes use classic stick-andtissue construction system produces very good strengfth keeping weight weii P-30 event specificatIons 020 Replica Fred Emmert 1200 first second Brad Levine 1049 third Dick Lyons 839 fourth Bill Valentine 806 fifth Bob Sunberg 759 Cabin won Hal Cover time 916 Larry Clark second 850 third Leon Nadol sky 742 Al Heinrik fourth 635 Bill Booth 5th 606 B Cabin saw Sal Taibi again first place fine time 1414 C Meyerscough second 1134 third B Aveustus 928 Dick Lyons fifth 853 C Gas exciting Doug Galbreath totaled amazing 4942 before finally missing max used OS VRB RC engine modified Dukie plane 101 aspect ratio weighed 43 oz say climbed rapidly would putting mildly Ralph Prey totaled 2947 second place third Dan Keegan 2205 Scott Reid fourth 1934 Wes Funk fifth 1405 Doug won Ocie Randall Trophy fourth time winning flight time A-B Nostalgia again proved later-year models fly longer bet ter power Dan Keegan maxed out 2729 first Jack Moreland maxed out 2622 second Terry Thorkild son maxed out 2343 Jim Adams fourth 1301 David Martin fifth 835 Saturday Night-Flying event won Travis Hunter 2954 Chas Dorsett second 1430 Bill Ruff third 1428 Scott Reid fourth 1405 Forrest Staines fifth 1153 Long before 6 oclock Sunday morn ing 1AA Texaco regular Tex aco models could heard droning away good warm air early starting get hot Sal Taibi put up AA Texaco total 4535 easy win over Bob Dittmars second-place 3106 Jim Adams third 2625 Bill Booth fourth 2047 fifth CJ Jordan 1628 regular Texaco event Bill Cohen ran away field flight 2932 almost double secondplace RB McKennas 1748 Jim Crocket third 1341 Larry Clark fourth time 1333 Brad Levine fifth 1241 C-D Nostalgia surprisingly no max outs RB McKenna won 1437 Dan Keegan second 1058 third Al Heitick 940 Hal Cover managed fourth D Gas found big Doug Galbreath max ing out 2325 Travis Hunter sec ond also maxing 2007 Dan Keegan third 1452 Bill Ruff fourth 1340 fifth Scott Reid 1320 Coupe dHiver another Bob-White-maxing-out contests total 1111 handily beat Joe Foster 1025 second Paul Masterson England third maxing 695 Ding BIGE SpEcihcATiofts Wisoypoow64 A.01206ooi0 Lossysh10 AwIAISywwSMcM Wolyb1 lb woody oo Ily P0EURA 2ENOAH ow QUADRA oy6oO P100 opociFy wlich o,o3oo 0 bol, 8w8 wlo odo8 voc ki Font. Ey bcld oooofwo bow owdwy MI bolwood 08 plywood poc0 wAs pouloo 08ws poolmd loll bs8s 81 odbooco0lcodRpbc IJMOOA wl% 0Ochso ME llcpww 08 IwwllAAo ocp~ SlAy Zwohol 7-bol sob 5l895 RowI poop dUll ip 1965 dOib so, shook ooSLOOow wood olcwlwcsd bock plo, 51895 Zarate fourth 659 Jim Quinn fifth 582 B Gas some reason another scored FAT fashion Bill Morgan maxed-out 1647 first place Don Berry maxed second place 1140 Jack Moreland maxed 960 sec third place Jon DeFries fourth 896 sec Mike Steam fifth 856 no scores announced A-l Towline Payload Electric ever winners follows A-i won Martyn Cowley sec ond Mike Johnson third Steve Geraghty fourth Antonio Abauza fifth Bill Booth Jr Payload first Terry Thorkildson sec ond Gus Sunberg third Erik Strengell fourth John Bonang fifth Ron Wittman Electric won Blane Beron Rawdon second Lynne Wainfain third Jim Ogg fourth Jim McDermoth fifth Tony Naccarato Last certainly least Grand Champion Marc Sisk traveled way Davenport IA really no wonder wonhe helper pretty wife Hattie Team Championship won San Diego Club #2 comprised Cezar Banks Paul Altonhoff guy gets Tomy timers around Bill Burke Joe Norcross announced after con test will Contest Director next year will flying hot day contest Sunday FLYING NEAR Al RPORTS BE CAREFUL PROTECT YOUR RIGHTTO FLY Us qoood 608111 wyl SIC F oow lo owls. Sd lowdiwo 05 locoslow pcoo.d 608 coo. bow oloo Ssd dock Ply loll p,.o *16 pow, TOOPO loclcdollIoosdosow oocopwIlwIooloowobly ThE NEW UPDATED E & L ZENOAN ENqINE PRECISE RIIJI VibuAhiaft p & L opdosod Iooo.co loclod bolSociwO iwllSOoOis cowpoOoiow d0 odlfid woMb, bopoocod Aiip cowboooboo ooood 46 owd cowol oob shoosol lbwboco jdId Spocdicoslooso 226 CID 2cyclo ydwooo p0Od OwiAs. 105000855 Polk bcobwy *010 piw owd powood posoonwy Sowooshi Mocb I, ciboosiow show botocod QUADRA powofoItPoowoOO lUbOpsop os 7500 RPIOI Dooblo boll booIwA cowkolAf Sold-,oo lOobolo 0 polOss WOiOIOS4 lb20 Eooylsoodssoosowy MASTERCARD Sweet P-3OlMather Continued page 70 tern end other pattern other Shape stack rib pat terns place first rib left panel second rib right panel continue alternating placement Cut strips 1/32 sheet tips Make inch longer min imum Soak strips water overnight bend same manner fuselage longerons dont like make rounded tips simply square off model will fly well Laminat ed tips such light strong Assemble wing center panel plan Use hardest strips leading edge top spars Note spars extend beyond last rib lapped joint can formed tip panel spars Such joint much stronger butt joints Usually bottom spars added after frame removed board pin surface flat again glue sets Assemble tip panels spars make easier shape joints right panel flat left panel washed out means trailing edge raised whole panel twisted So prop up trailing edge left tip panel being assembled ribs glued twist built Pin completed center panel board set tips position propped up correct dihedral angle Cut tip panel leading trailing edges angle mate wing edges Dont fret joints perfect though advantages aliphatic glue can brushed joint gaps form strong bond Observe panels rear right has no twist left trailing edge September1984 167 VISA B & L Manufacturin1 AbTl Losodo Lw, Scossodolo Awoowo 65251 602 41-OhS Tail surfaces outlines stabili zer fin made hard /16 balsa course /32 balsa can substituted dont like working smaller sizes hard /I6 available However hard /16 makes strong light surface stab ribs made same fash ion wing ribs fin has symmet rical airfoil requires additional step As rib cut curved left side sliced off portion shown line top view fin assem bled over plan fin re moved plan left sides ribs glued back fin airfoil critical given some thickness resist warping effective flat plate Coverlag/finishing preparation covering sand parts fine sand paper remove bumps rough spots coat wood parts will contact covering tissue two three coats clear dope dope step can fairly thick Again sand lightly fine sandpaper Lay piece tissue over area covered brush dope thinner liber ally over wood structure through tissue thinner will penetrate porous tissue soften dope will adhere tissue Check loose areas reapply thinner Cover fuselage before fin glued cover fin after glued fuselage area fuselage encloses tne motor given two layers cross grained tissue makes fuselage very rigid Apply layer water-shrink tissue apply coat finishing clear dope apply second layer finishing clear dope should rather thin Three parts thinner part dope good like use nitrate dope add three drops castor oil per ounce thinned mixture leaves tissue bit flexibility reduces amount shrinking some what Two coats will suffice Glue fin fuselage just little offset right turn cover water-shrink apply dope Check carefully rear about /32 left fin side should visible right During finishing process warp may have developed Boil water kettle having spout place warped part steam twist opposite direc tion remove warp Flying Weigh out 10 grams A-in rub ber strip make motor three loops six strands Make secure knot thoroughly soaking ends saliva tying overhand knot Pull tight near breaking point rub ber Again soak ends tie another square knot upon first Install motor model utilizing peg hole leaves motor slightly slack Aluminum tubing outside diameter will work rear peg stretch rubber hard fullwinds effort sure slide piece /6 piano wire larger through tube first Assemble model using rubberbands stretched about twice atrest length Slip stab under monofilament connect rubberband peg run through hook stab onto second peg stab will pull up dethermalizer posi tion Place small rubberband over snuffer tube end straddle fuse loop under side hooks connect hook end monofilament pushing rear stab down Check balance point model add weight front rear necessary achieve balance 1 ward trailing edge Observe model rear stab should parallel center section wing though right tip can slightly high flight testing lubricate motor motor placed small plastic bag rubber lube poured inside will less mess Fudo Takagi first suggested procedure believe Try locate area covered weeds grass testing disadvantage freewheeling propellers blade can snap off during fast landing hard surface Hand-glide model pointed slightly nose-down coming breeze model glides quite slowly because its light weight prop drag violent diving stalling occurs check wing stab angles balance point OK try different launch speed diving persists shim up rear stab conversely put shim under front stab model stalls Strips IBM tab cards make good thin shims Most models require some downthrust avoid power stalls ticipate putting A2-in piece balsa between top nose block fuselage Wind motor about 100 turns launch slightly nose-high position Ideally model will climb few feet glide down large right turn model goes straight dur ing both parts flight steam little turn finor glue small tab trailing edge fin up stab wont hit power phase flight straight shim left side nose block glide phase flight too straight place shims between right side fuselage stab stab tilt Power stalling can corrected additional downthrust side thrust As flight pattern smooths out crease number turns Eventually model should climb steeply slight right bank circle Try changing down side thrust small amounts get maximum altitude models climbers too much right rudder right thrust model may drop right wing during first part climb fine balance needed removing right rudder straightens out glide too much just add stab tilt fully stretched wound motor will take about 1000 turns de 88 Model Aviation up about Lay tip spars posi tion angle ends form good joint center panel spars As glued check panels unwanted warps pending upon type rubber used prop run typically 20 25 seconds though model gets quite high will come down fast unless ther mal contest flying practice picking good air well trimming model Good Flying FF IndoorlTenny Continued page 71 new high-tech material requires some special handling and/or building techniques race develop reliable low-weight building methods us ing materials Help using carbon boron fibers new plastic films other materials improve models tell us about word warning Howard Haupt editor El Torbellino newsletter San Diego Orbiteers very recent issue printed following warning Boron glass-like material can very brittle Being brittle can shatter cause small sharp slivers slivers can penetrate skin ease will work themselves back surface Once under skin slivers least minor irritant worst danger heart lungs work way bloodstream Modern boron fiber pretty well behaved will break cleanly bent sharply pliers must take care dispose scrap ends broken off Little pieces boron cannot left laying about worktable floor Two ways discussed ensure proper disposal boron scrap ends have small bottle table repository boron scrap work material As break end off pliers continue grip pliers drop bottle Two place masking tape end boron trimming After breaking off end tape attached dispose wastepaper basket Bostonian year Manhattan Cabin became official event rush set records four AMA ceiling categories three age classes uni fies activity standard rules Now Ed Whittens New York door Times get set official rules Bostonian Cabin 1 Maximum projected wingspans 16 maximum wing chord 3 2 Maximum propellers diameter 6 3 Power limited rubber motors 4 All surfaces double-covered 5 Minimum weight rubber motors 7 grams 6 Maximum overall length 14 excluding propellers 7 Fuselage must contain exceed theoretical box measuring 1 x 2A x 3 longerons must both supNow Kit Form Save easy assemble 4 channel kit expandable 71 OnlyS 7995 service parts available past manufactured EK Logitrol radios including Logitrol manufactured Cirrus Tower Hobby Lobby radios Free servo reversing Hobby Lobby radios included service work FCS-4 Four Channel Radio Wider body ends aching shoulder muscles Angled easier monitering battery charge Designed easily accept new frequencies Servo reversing simply reversing plug Adjustable stick tension Inexpensive replacement servos V 4UOmAH battery pack I600mAH ft 1200mAH extral Expandable port motor form exceed box requirement No motor sticks allowed Fuselage must have forward windshield window side least square inch area 8 Landing Gear must fixed least two wheels Y4-in minimum diam eter rigid enough successfully sup port model hand-glided landing 9 Rise Off Ground least two wheels required takeoffs official flights 10 Charisma FactorThe judge rates model model appeals him based construction neatness scalelike details unique features design etc 100 rating up 130 used Two models may given same rating models rated against other against 100 130 scale 11 An unlimited number flights allowed total full seconds three best flights multiplied Charisma Factor determining models score 12 More model may entered prize entrant will awarded Ed Whitten has said Bostonian Cabin models Flying Scale models . except no full-sized mancarrying version Two photos models built some time back John Triolo shown perhaps can see what Ed means might notice design feature two modelsJohn clever ly arranged designs accommodate full-length motors best rubber usage Bedford reg ulars sessions Bedford Boys Ranch Bedford TX Al Backstrom Frisco TX Al flies some Indoor Scale flying wing models really fun $11995 wIth large lInear serve $12995 maK rotary servos Send 8Sf let cemplete catuleg 509 4S72 122 watch model launching photo flying-plank style use nothing except reflex airfoil stability model doesnt seem lack stability can hit ceiling recover very little loss alti tudefar better Scale models better some serious Indoor models Bud Tenny PO Box 545 Richardson TX 75080 FF DurationlMeuser Continued page 73 inner tip wing panels angles B D angles need know setting ribs adjacent dihe dral breaks sanding proper angle dimensions m h amounts prop up end panel gluing end another scenarios involving considerable trial-and-error modelers arrive final dimensions wings Ferrers Second Notion seems pretty good what model designer would really like 1 establish semi-span tip angle 2 establish ratio c d 3 invoke Ferrers First Notion about ellipse business other numbers interest should fall out onto floor ratio c d Well suppose decide rib spacing uniform throughout wing previous experience perhaps simply wild guess decide tip panel should have six rib spaces inner panel should have 10 c/d John calls R simply 10/6 Continued page 172 September 1984 169 Full Command Systems 908 E Rosewood Spokane WA 99208
Edition: Model Aviation - 1984/09
Page Numbers: 68, 69, 70, 167, 168, 169
right T dral angle ssary icarly ni cue frames con d Fiber insulatioi fine F ers quite ea enough hold nile hties i out sh j us wv scrappiec coup solderina 4th aCD& tfl n use e tli WOOd Loacur ealsa wil water wood hold uom age ss P-30 rubberpowered model can interesting change pace fairly small size re quired plastic prop can built quickly inex pensively text provides some ex cellent information have modest ex perience Clarence Mather work fine used properly favor phatic resins such Titebond soak wood form very strong joint dont shrink dry slowly enough pieces can fitted carefully Such glues quite thick usually squeeze some small bottle add few drops water weakens glue somewhat still plenty strong slightly-diluted glue will keep very lone mix small por tion time Coatboth edges joint allow glue soak several seconds As pieces joined some glue will squeeze out Use damp brush immediately remove much ex cess possible glue side frame dry remove pins leave frame plan Lay piece Saran Wrap over assemble second frame top first produce matched pair frames removed plan separated drill holes rear motor already done run glue ring around hole inside strengthen balsa number holes made because rubber varies thick ness batch batch sometimes varies different places within strip times unwound motor must slack freewheeling unit func tion dont want too much slack multiple holes allow adjustment motor proper amount slack Utilize two jig formers assemble two side frames box Jig farmers simply rectangular pieces sheet balsa cut fit between frames glued lightly place hold frames position adding fuse lage cross members jig formers cut free Lay fuselage sides members sheeted areas Cut flat inside facing up Glue jig couple observation holes sheeting formers vertically Lay second bottom rear peg holes fuselage side atop jig formers taking wood dowels used medical swab sticks care box formed square good size wing stab hold ends sides Add cross down rubberbands Pieces A2-in piano September 1984 69 model features tip dihedral strong lateral stability forward dethermalizer fuse mounting just behind wing shows clearly above picture moderately heavy plastic prop combined lightweight rear end allows wing placed well forwardand long stable efficient rear moment arm results -SIZE PLANS AVAILABLE. SEE PAGE 180 33 HARD F ISE 1/B FOR WASHOUrCENTER PANEL IS FLAYWING SPAR JOINTND WASHOUT 2P DIHEDRAL THREE LAMINATIONS OF 1132x1S.STAB EDGES AND SPAR HARD 11BP ASTIC PROP TWO LAMINATIONS 132xV16 /POWER-THREE DOPS OFPECK SHAFT IIII18 RUBBER OGRAMSBEARING IIIIISLIGHT ROH RUDDER HRUS XXIIIIII332SHEE BOX FUSE 1/4 TUBE NCEBA SW-A ERNATE NOSE A-WIRE GUIDE4 MONOFILAMLNT - ---- HIN PIANO WIRE EYE-/ -STAB1/B TUBEN3/32 HARD BALSA FRAMESCROCKET p_, -- REHODK- SMALL DOWELHDOK II - -i7CTh -7 FUSE OMITTED STAB RIBWING CENTERWING TIP ALLARE132FIRMBALSA911112 SWEET P-3D CAtA wire would also job wire harder keep glued place inner part nose plug must fit snugly front fuselage may fall out during glide ruin flight Some modelers glue couple small hooks fuselage cut groove nose block loop rubberband around block hold place PeckPolymers sells nose bearings prop shaft combos well plastic props P-30s work fine stocked hobby shops fuselage side view shows detachable rubber hook used winding tube can employed protect fuselage motor breakage during winding sketched cast aluminum hook sold Jim Crocket Various types homemade modelers simpler unit shown cross-sec tion sketch modelers wanting wind motors directly detachable type recommended because sooner later motor will break rubber wound full turns As P-30 very light model can soar quite well drag freewheeling prop Unless plan fly early mornings late eve nings dethernializer definitely needed shown plan reduce fire hazard flying fields covered dry grass brusha fire just waiting start Fortunately fire isnt likely start unless igniter down low dry material dense fuse located atop fuselage nearly impossible dethermal izer line tied eye rear fuselage brought forward over top stab Thus line fully exposed easy install adjust Al Ulm Orbiteers Club came up variation believe works fine free end snuffer tube cut projection sticking out act hook forward end dethermalizer band fine jewelers saw does job well Note projection blends rest tube rounded curve strength Dont put larger loads thin aluminumthe rubberbands have stretched twice length Glue snuffer tube fuse lage sheeting very securely fill area below tube piece Y6 balsa piano wire side hooks solidly glued piece whole unit can secured piece silk gauze glued overall dethermalizer line installed until after fuselage completed Wing Pick piece firm sheet /32 balsa ribs Cut 14 rectangular pieces bit larger wing center panel ribs Trace rib pattern two ribs place end stack pieces Pin stack together shape stack rib pattern tapered tip panels cut out eight rectangular pieces trace largest rib pattern end smallest rib another Stack pieces patContinued page 167 70 Model Aviation gn makes use classic stick-andtissue construction system produces very good strengfth keeping weight weii P-30 event specificatIons 020 Replica Fred Emmert 1200 first second Brad Levine 1049 third Dick Lyons 839 fourth Bill Valentine 806 fifth Bob Sunberg 759 Cabin won Hal Cover time 916 Larry Clark second 850 third Leon Nadol sky 742 Al Heinrik fourth 635 Bill Booth 5th 606 B Cabin saw Sal Taibi again first place fine time 1414 C Meyerscough second 1134 third B Aveustus 928 Dick Lyons fifth 853 C Gas exciting Doug Galbreath totaled amazing 4942 before finally missing max used OS VRB RC engine modified Dukie plane 101 aspect ratio weighed 43 oz say climbed rapidly would putting mildly Ralph Prey totaled 2947 second place third Dan Keegan 2205 Scott Reid fourth 1934 Wes Funk fifth 1405 Doug won Ocie Randall Trophy fourth time winning flight time A-B Nostalgia again proved later-year models fly longer bet ter power Dan Keegan maxed out 2729 first Jack Moreland maxed out 2622 second Terry Thorkild son maxed out 2343 Jim Adams fourth 1301 David Martin fifth 835 Saturday Night-Flying event won Travis Hunter 2954 Chas Dorsett second 1430 Bill Ruff third 1428 Scott Reid fourth 1405 Forrest Staines fifth 1153 Long before 6 oclock Sunday morn ing 1AA Texaco regular Tex aco models could heard droning away good warm air early starting get hot Sal Taibi put up AA Texaco total 4535 easy win over Bob Dittmars second-place 3106 Jim Adams third 2625 Bill Booth fourth 2047 fifth CJ Jordan 1628 regular Texaco event Bill Cohen ran away field flight 2932 almost double secondplace RB McKennas 1748 Jim Crocket third 1341 Larry Clark fourth time 1333 Brad Levine fifth 1241 C-D Nostalgia surprisingly no max outs RB McKenna won 1437 Dan Keegan second 1058 third Al Heitick 940 Hal Cover managed fourth D Gas found big Doug Galbreath max ing out 2325 Travis Hunter sec ond also maxing 2007 Dan Keegan third 1452 Bill Ruff fourth 1340 fifth Scott Reid 1320 Coupe dHiver another Bob-White-maxing-out contests total 1111 handily beat Joe Foster 1025 second Paul Masterson England third maxing 695 Ding BIGE SpEcihcATiofts Wisoypoow64 A.01206ooi0 Lossysh10 AwIAISywwSMcM Wolyb1 lb woody oo Ily P0EURA 2ENOAH ow QUADRA oy6oO P100 opociFy wlich o,o3oo 0 bol, 8w8 wlo odo8 voc ki Font. Ey bcld oooofwo bow owdwy MI bolwood 08 plywood poc0 wAs pouloo 08ws poolmd loll bs8s 81 odbooco0lcodRpbc IJMOOA wl% 0Ochso ME llcpww 08 IwwllAAo ocp~ SlAy Zwohol 7-bol sob 5l895 RowI poop dUll ip 1965 dOib so, shook ooSLOOow wood olcwlwcsd bock plo, 51895 Zarate fourth 659 Jim Quinn fifth 582 B Gas some reason another scored FAT fashion Bill Morgan maxed-out 1647 first place Don Berry maxed second place 1140 Jack Moreland maxed 960 sec third place Jon DeFries fourth 896 sec Mike Steam fifth 856 no scores announced A-l Towline Payload Electric ever winners follows A-i won Martyn Cowley sec ond Mike Johnson third Steve Geraghty fourth Antonio Abauza fifth Bill Booth Jr Payload first Terry Thorkildson sec ond Gus Sunberg third Erik Strengell fourth John Bonang fifth Ron Wittman Electric won Blane Beron Rawdon second Lynne Wainfain third Jim Ogg fourth Jim McDermoth fifth Tony Naccarato Last certainly least Grand Champion Marc Sisk traveled way Davenport IA really no wonder wonhe helper pretty wife Hattie Team Championship won San Diego Club #2 comprised Cezar Banks Paul Altonhoff guy gets Tomy timers around Bill Burke Joe Norcross announced after con test will Contest Director next year will flying hot day contest Sunday FLYING NEAR Al RPORTS BE CAREFUL PROTECT YOUR RIGHTTO FLY Us qoood 608111 wyl SIC F oow lo owls. Sd lowdiwo 05 locoslow pcoo.d 608 coo. bow oloo Ssd dock Ply loll p,.o *16 pow, TOOPO loclcdollIoosdosow oocopwIlwIooloowobly ThE NEW UPDATED E & L ZENOAN ENqINE PRECISE RIIJI VibuAhiaft p & L opdosod Iooo.co loclod bolSociwO iwllSOoOis cowpoOoiow d0 odlfid woMb, bopoocod Aiip cowboooboo ooood 46 owd cowol oob shoosol lbwboco jdId Spocdicoslooso 226 CID 2cyclo ydwooo p0Od OwiAs. 105000855 Polk bcobwy *010 piw owd powood posoonwy Sowooshi Mocb I, ciboosiow show botocod QUADRA powofoItPoowoOO lUbOpsop os 7500 RPIOI Dooblo boll booIwA cowkolAf Sold-,oo lOobolo 0 polOss WOiOIOS4 lb20 Eooylsoodssoosowy MASTERCARD Sweet P-3OlMather Continued page 70 tern end other pattern other Shape stack rib pat terns place first rib left panel second rib right panel continue alternating placement Cut strips 1/32 sheet tips Make inch longer min imum Soak strips water overnight bend same manner fuselage longerons dont like make rounded tips simply square off model will fly well Laminat ed tips such light strong Assemble wing center panel plan Use hardest strips leading edge top spars Note spars extend beyond last rib lapped joint can formed tip panel spars Such joint much stronger butt joints Usually bottom spars added after frame removed board pin surface flat again glue sets Assemble tip panels spars make easier shape joints right panel flat left panel washed out means trailing edge raised whole panel twisted So prop up trailing edge left tip panel being assembled ribs glued twist built Pin completed center panel board set tips position propped up correct dihedral angle Cut tip panel leading trailing edges angle mate wing edges Dont fret joints perfect though advantages aliphatic glue can brushed joint gaps form strong bond Observe panels rear right has no twist left trailing edge September1984 167 VISA B & L Manufacturin1 AbTl Losodo Lw, Scossodolo Awoowo 65251 602 41-OhS Tail surfaces outlines stabili zer fin made hard /16 balsa course /32 balsa can substituted dont like working smaller sizes hard /I6 available However hard /16 makes strong light surface stab ribs made same fash ion wing ribs fin has symmet rical airfoil requires additional step As rib cut curved left side sliced off portion shown line top view fin assem bled over plan fin re moved plan left sides ribs glued back fin airfoil critical given some thickness resist warping effective flat plate Coverlag/finishing preparation covering sand parts fine sand paper remove bumps rough spots coat wood parts will contact covering tissue two three coats clear dope dope step can fairly thick Again sand lightly fine sandpaper Lay piece tissue over area covered brush dope thinner liber ally over wood structure through tissue thinner will penetrate porous tissue soften dope will adhere tissue Check loose areas reapply thinner Cover fuselage before fin glued cover fin after glued fuselage area fuselage encloses tne motor given two layers cross grained tissue makes fuselage very rigid Apply layer water-shrink tissue apply coat finishing clear dope apply second layer finishing clear dope should rather thin Three parts thinner part dope good like use nitrate dope add three drops castor oil per ounce thinned mixture leaves tissue bit flexibility reduces amount shrinking some what Two coats will suffice Glue fin fuselage just little offset right turn cover water-shrink apply dope Check carefully rear about /32 left fin side should visible right During finishing process warp may have developed Boil water kettle having spout place warped part steam twist opposite direc tion remove warp Flying Weigh out 10 grams A-in rub ber strip make motor three loops six strands Make secure knot thoroughly soaking ends saliva tying overhand knot Pull tight near breaking point rub ber Again soak ends tie another square knot upon first Install motor model utilizing peg hole leaves motor slightly slack Aluminum tubing outside diameter will work rear peg stretch rubber hard fullwinds effort sure slide piece /6 piano wire larger through tube first Assemble model using rubberbands stretched about twice atrest length Slip stab under monofilament connect rubberband peg run through hook stab onto second peg stab will pull up dethermalizer posi tion Place small rubberband over snuffer tube end straddle fuse loop under side hooks connect hook end monofilament pushing rear stab down Check balance point model add weight front rear necessary achieve balance 1 ward trailing edge Observe model rear stab should parallel center section wing though right tip can slightly high flight testing lubricate motor motor placed small plastic bag rubber lube poured inside will less mess Fudo Takagi first suggested procedure believe Try locate area covered weeds grass testing disadvantage freewheeling propellers blade can snap off during fast landing hard surface Hand-glide model pointed slightly nose-down coming breeze model glides quite slowly because its light weight prop drag violent diving stalling occurs check wing stab angles balance point OK try different launch speed diving persists shim up rear stab conversely put shim under front stab model stalls Strips IBM tab cards make good thin shims Most models require some downthrust avoid power stalls ticipate putting A2-in piece balsa between top nose block fuselage Wind motor about 100 turns launch slightly nose-high position Ideally model will climb few feet glide down large right turn model goes straight dur ing both parts flight steam little turn finor glue small tab trailing edge fin up stab wont hit power phase flight straight shim left side nose block glide phase flight too straight place shims between right side fuselage stab stab tilt Power stalling can corrected additional downthrust side thrust As flight pattern smooths out crease number turns Eventually model should climb steeply slight right bank circle Try changing down side thrust small amounts get maximum altitude models climbers too much right rudder right thrust model may drop right wing during first part climb fine balance needed removing right rudder straightens out glide too much just add stab tilt fully stretched wound motor will take about 1000 turns de 88 Model Aviation up about Lay tip spars posi tion angle ends form good joint center panel spars As glued check panels unwanted warps pending upon type rubber used prop run typically 20 25 seconds though model gets quite high will come down fast unless ther mal contest flying practice picking good air well trimming model Good Flying FF IndoorlTenny Continued page 71 new high-tech material requires some special handling and/or building techniques race develop reliable low-weight building methods us ing materials Help using carbon boron fibers new plastic films other materials improve models tell us about word warning Howard Haupt editor El Torbellino newsletter San Diego Orbiteers very recent issue printed following warning Boron glass-like material can very brittle Being brittle can shatter cause small sharp slivers slivers can penetrate skin ease will work themselves back surface Once under skin slivers least minor irritant worst danger heart lungs work way bloodstream Modern boron fiber pretty well behaved will break cleanly bent sharply pliers must take care dispose scrap ends broken off Little pieces boron cannot left laying about worktable floor Two ways discussed ensure proper disposal boron scrap ends have small bottle table repository boron scrap work material As break end off pliers continue grip pliers drop bottle Two place masking tape end boron trimming After breaking off end tape attached dispose wastepaper basket Bostonian year Manhattan Cabin became official event rush set records four AMA ceiling categories three age classes uni fies activity standard rules Now Ed Whittens New York door Times get set official rules Bostonian Cabin 1 Maximum projected wingspans 16 maximum wing chord 3 2 Maximum propellers diameter 6 3 Power limited rubber motors 4 All surfaces double-covered 5 Minimum weight rubber motors 7 grams 6 Maximum overall length 14 excluding propellers 7 Fuselage must contain exceed theoretical box measuring 1 x 2A x 3 longerons must both supNow Kit Form Save easy assemble 4 channel kit expandable 71 OnlyS 7995 service parts available past manufactured EK Logitrol radios including Logitrol manufactured Cirrus Tower Hobby Lobby radios Free servo reversing Hobby Lobby radios included service work FCS-4 Four Channel Radio Wider body ends aching shoulder muscles Angled easier monitering battery charge Designed easily accept new frequencies Servo reversing simply reversing plug Adjustable stick tension Inexpensive replacement servos V 4UOmAH battery pack I600mAH ft 1200mAH extral Expandable port motor form exceed box requirement No motor sticks allowed Fuselage must have forward windshield window side least square inch area 8 Landing Gear must fixed least two wheels Y4-in minimum diam eter rigid enough successfully sup port model hand-glided landing 9 Rise Off Ground least two wheels required takeoffs official flights 10 Charisma FactorThe judge rates model model appeals him based construction neatness scalelike details unique features design etc 100 rating up 130 used Two models may given same rating models rated against other against 100 130 scale 11 An unlimited number flights allowed total full seconds three best flights multiplied Charisma Factor determining models score 12 More model may entered prize entrant will awarded Ed Whitten has said Bostonian Cabin models Flying Scale models . except no full-sized mancarrying version Two photos models built some time back John Triolo shown perhaps can see what Ed means might notice design feature two modelsJohn clever ly arranged designs accommodate full-length motors best rubber usage Bedford reg ulars sessions Bedford Boys Ranch Bedford TX Al Backstrom Frisco TX Al flies some Indoor Scale flying wing models really fun $11995 wIth large lInear serve $12995 maK rotary servos Send 8Sf let cemplete catuleg 509 4S72 122 watch model launching photo flying-plank style use nothing except reflex airfoil stability model doesnt seem lack stability can hit ceiling recover very little loss alti tudefar better Scale models better some serious Indoor models Bud Tenny PO Box 545 Richardson TX 75080 FF DurationlMeuser Continued page 73 inner tip wing panels angles B D angles need know setting ribs adjacent dihe dral breaks sanding proper angle dimensions m h amounts prop up end panel gluing end another scenarios involving considerable trial-and-error modelers arrive final dimensions wings Ferrers Second Notion seems pretty good what model designer would really like 1 establish semi-span tip angle 2 establish ratio c d 3 invoke Ferrers First Notion about ellipse business other numbers interest should fall out onto floor ratio c d Well suppose decide rib spacing uniform throughout wing previous experience perhaps simply wild guess decide tip panel should have six rib spaces inner panel should have 10 c/d John calls R simply 10/6 Continued page 172 September 1984 169 Full Command Systems 908 E Rosewood Spokane WA 99208