Hansa Profile

MOST MODELERS have urge now build something looks bit different efforts along lines have fairly tame centering around num ber low-wing biplane Rubber mod els saw three-view picture Hansa though changed airplane begged modeled its swept-forward wing sweptback tail Hansa definitely unusual business jet light transport plane features quick-change facilities allow con version cargo layout ac commodates up 12 passengers Hailing West Germany Hansa its inau gural flight 1964 Just 50 planes made including eight West German air force flown Rubber model Hansa needs prop pusher prop rub ber motor have adapted com promise course allows air planes interesting configuration en joyed fun model its built rules No-Cal Scale 16-in wingspan recognizable Scale model rubber power Hansas generous wood requirement makes little heavy serious competi tion No matter model fun will attract interest flying field Although its fairly intricate-looking model Hansa deceptively simple build because wing pieces tail dont require curved tips preference pre pare covering tissue before building airplane structure Use whatever color scheme appeals shown based photo full-size plane Starting lightcolored tissue main background color trim windows can added markers darker-colored tissue ad hered rubber cement Use thin-tipped marker add control surface outlines win dow frames other decorations Set tissue pieces aside well move building model Wing Make cardboard wing rib tem plate slice out ribs leaving full-length time being Lay out wings leading edge trailing edge pin down Add ribs ex ception center rib trimming trailing edge fit After raising half wing supporting two dihedral jigs add center rib four stick gussets fuselage body stabilizer some what easier wing build theyre made entirely square sticks plus bit scrap sheet balsa front rear body Glue two stiff sticks together motor stick thrust bearing made shown plans order provide some adjustment thrust linequite im portant good performance Hansa requires pusher prop Due arrangement fm stab its probably best make own bent prop also allows motor stick bit shorter lightens tail little made prop plastic-coated surfaces large cottage cheese container Place blade pattern 150 off vertical trace around blade wish can also make blades / sheet balsa wet forming side cylindrical can bottle Tape balsa blades 150 angle can dry 68 Model Aviation Continued page 153 Top While probably wont walk away flying trophies No-Cal Scale contest good flying model certainly unique looking business jets ever produced Above author launches model skies calm afternoon Full-Size Plan Pages 97-100 either type blade hub fash ioned hard 78-in-sq balsa Drill /32 hole through hub place piece wire hole reference purposes Use sanding block form flat seat blades Glue blades hub making sure about same angle lean far enough rear An alternative malting own prop use & 7-in plastic commercial should installed front prop part freewheel catch faces thrust bearing original catch should smoothed over sandpa per less friction Bend plastic blades rear freewheeling prop virtually essential flying Hansa outdoors Other wise plane stops flying prop stops turning make freewheeling prop youll need some type spring thats needed gentle spring permits prop shaft move away pin hub after motor unwinds small spring shown plan BIC similar brand throwaway lighterthe spring gas nozzle long heavier flint Another approach would make mousetrap type spring scrap control line wire Covering Hansa easily quickly done Use sanding block remove glue bumps rough wood Cover body its left side viewed tail Use clear dope attach tissue making sure pull up tightly minimum wrinkles Trim edges carefully lightly built structure cant tolerate water shrinking doping because would warp badly model looks OK flies very well extra steps Continued page 181 January 1989 69 Launching pusher model can bit awkward Try holding body right hand prop left hand Release prop first gently push model forward Decoration takes place before its built Tape pieces tissue planadd surface hinge lines marker trim windows colored tissue glued rubber cement Building done directly over plans shrink tissue will warp structure sliced ribs really unusual part models construction Just dont forget make prop pusher re member must allowed freewheel FF Old-Timers/Baker Continued page 176 big fin makes high power very tricky wants spiral dive flown hands-off same September column talked about importance having small fin area going fly Free Flight high power pleased get letter Bill McCombs senior engineer Vought Corporation agrees great book published Air Age Inc Model Airplane News some years ago entitled Flying Improving Scale Model Airplanes Find copy can Does anyone still have bunch sale includes much data FF performance stabil ity trim limited Scale models Bill later published Making Scale Models Fly mostly limited Scale principles apply flying thing think can buy later book directly him 2106 Siesta Dr Dallas TX 75224 last time saw Peck-Polymers catalog listed too can find copy earlier larger book think will agree worth hunt Bill says power climbing angle crease fin size can tolerated spiral flight developing smaller very large dihedral spiral flight can climb old enemy spiral dive lurks nearby very old antique Cabin models nce allowed cut off fin area increase dihedral d better fly Long Cabins Musketeers power levels designed handle next time Please keep letters photos coming Hansa No-CaI/Lidberg Continued page 69 Lay body down its left covered side glue motor stick making sure place stick wing must fit Add stabilizer wing havent already done make up tip tanks add jet engine Make lightening holes sheet balsa parts using piece sharpened brass tub ing eraser holder old wooden pencil cover parts glue place Attach ioop rubber check balance Add clay front body necessary obtain balance point shown plan Check plane over warps us ing dry heat electric stove burner space heater straighten out Try test glide making sure prop freewheels air Some adjustment add ing removing clay may necessary optimal glide Try some power flights Use about 100 turns making sure wind correct direction Power adjustments made largely using bendable thrust bear ing model stalls bend bit downthrust wont climb take out some downthrust add turns and/or take off some clay airplane seems happiest wide climb turn youre ready turn few heads flying field Hansa surefire way have some fun doing Lippisch/Mcllrath Continued page 72 another idea didnt pan out course such failures frustrations common research work some times disappointments can provide laughalthough humor situa tion might obvious time Such incident occurred building new tail duct replace dam aged flying model should light flies off workbench itself favorite Lippisch expression Saving weight always pri mary building goals particular morning doctor stopped workbench inspect nearly completed duct section picked up part weighed hand tossed down bench obvious dissatisfaction Too heavy announced Much too heavy its lots lighter old argued Twenty-three grams instead 31 Dr Lippisch sputtered moment stmggling find way explain such obvious principle poor slow-witted fellow Finally controlling himself ef fort quoted what might called Lip pischs First Law Aerodynamics feels too heavy too heavy marched out shop probably silently lamenting problem finding good model builders anymore As several stories have shown Dr Lippischs wit often mixed wisdom Sometimes after care ful reflection listener could tease out much playfulness much penetration words contained example friend once told discussion Dr Lippisch building pedal-powered plane jokingly called pedalfiugel un der consideration plane built like giant Indoor model using balsa much stmcture doctor describing amazing strength balsa tail boom section just tested Fifteen hundred pounds supported compression reported enthusiastically can keep compression interrupted another listener What some unexpected loads buckles tail collapses asked lis tener thinking course fate unfortunate individual manning ped als handlebars breaks fix answered doctorhis standard response whenever questioned strength unmanned models immediately resumed earlier dis cussion surprised hear doctor seemingly brush aside issue pilots safety safety people flying airplanes always Dr Lippischs pri mary concern proud fact never fatal accident during testing of civil designs wartime development fu turistic rocket-powered Me-163 ad hered cautious methods doctor followed earlier work Testing gan unpowered flights glider tiny interceptor towed aloft plane released high altitude Engineering measurements pilot familiarization exciting aerobatics safely per formed during long glides back earth Obviously pilots safety line breaks fix just wasnt like doctor ignoring danger accident pedalfiugel Looking back dont think Dr Lippisch years experi ence areas related man-powered air craft low-speed flight lightweight struc tures ground effect phenomena testing unorthodox machines Long before conversation understandably con cerned listener must have visualized actually calculated floating shoulderhigh flight giant Indoor model clearly sure serious injury highiy unlikely considered prob lem decided would problem erased mind Years later history Gossamer Condor Albatross projects confirmed principles extreme lightuess easy repairability two keys success human-powered flight As breaks fix dozens crashes Condor Albatross sur vived serious injury proved underneath its apparent casualness Dr Lip pischs maxim expressed sound engineer ing principle Dr Alexander Lippisch man ahead time ideas advanced spent whole adult life dragging much aeronautical world along behind him Trying convince doubting experts hed snort used term pleading businessmen research funds trying make rest us see future through eyes Sustaining kind effort year after year demands combination qualities few men possess Probably vivid sense humor traits made possible Doctor Lippischs brilliant leadership aeronautical science nearly 60 years CL Aerobatics/Fancher Continued page 74 response rate somewhat Nonetheless found ship could flown fairly comfort ably supplied Dacron lines handle later fly ship bellcrank itself mounted top wing control lines exit fuselage along top inboard wing similar cur rent Combat models clever two-piece lead out guide provided locate lead-outs January 1989 181