Free Flight: Duration

Free Flight Duration Harry Murphy LIKE AS NOT answer Whats new Outdoor Free Flight days can often produce some vintage item has just popped surface after lying around submerged relatively unno ticed years Whereas some contemporary readers may consider rediscovery modeling arti facts news certainly enjoy stories usually associated instances am prime supporter recording such things paper ver ification still possible no means feel retaining soft spot little modeling history cause alarm may unfurling old Free Flight Dead banner again rate cross-sectional study specific interests total present day Outdoor Free Flight community would surely confirm Old-Timer Nostalgia Gas followings grabbing off goodly share total competition activity fair move over occasionally permit some space folks possible reasons seemingly increasing trend recap ture past have often discussed fellow supporters apparent prime reason usually sifting down fact participants conI 135 U L1 0612 21375 Plyeood Sht 3/16 Core B Al C D Original Airfoil Ribs 3/32 Sht Stab Airfoil 7% Clark Y w 9 I 20 0 LI 65% CO // - 9L9 4fA E 3/16 Sht -- -II II 951 Bob Larshs 1 91j9-51 MODERN BOMBSHELL Bob Larshs Modem Bombshell built two versions 1949 1951 shown sider things arefor lack better explanationsimply fun Therefore interest fun recently leaned little model historian Bob Larsh before could pro duce pen note pad coughed up couple exclusive items never previously seen commercial print item early glow-engine-powered model design own other being interesting homebuilt hybrid takeoff old Brown Jr engine Bird Dog Bob unique individuals amazing memory said could remember first pair baby shoes would certainly believe him will persistently trace tiniest lead oblivion attempt shed additional light subject efforts regard have probably 60 Model Aviation Bud Brown Lawrencevllle IL winning twin-f P30 model Mid America Airports Fail Meet Bud mainstays Tn-Country Aero Club promotes both FF RC southern llllnolsIlndlana region admits making full circle active cipatlon FF RC back F agaIn also files full-scale pianos I-anerlaaugnter team OT Larry ana Amore Wiills Mid-America Airport near Lawrencevliie IL Midwests really great FF sites Next year therell 2-day FF meet hosted Tn-County Aero Club young Bob Larsh back 1951 makes adjustment tail Modern Bombshell Fort Harrison con test near indlanapoils Forsterpow ered vintage flying machine couid Inter est Nostaigia Gas buffs responsible additional designs being attached SAM Socie ty Antique Modelers eligibility list other sources combined also personally researched Nostalgia Gas engine situation resulted present official NFFS Engine Eligibility List Godsend Nos Gas Contest Director along Ralph Prey John Pond presently attempt ing grind out Nos Gas Eligible Design List well recent extensive biography Carl Goldbergs Zipper another example thoroughness Thviously Bobs contributions recording modeling history appreciated us will probably become invaluable years come older generation disintegrates passes next Meanwhile Bob offers us portion own nostalgic memories following contribution Modern Bombshell Sez Robert current interest shown Nostalgia models thought might like hear about model back 1949 built PlymouthDetroit Internationals being completed week before B/C size gassie powered glow Forsters 64-in wingspan incorporated original airfoil called Modem Bombshell admittedly very original thought name seemed appropriate particular airplane time put up its first test flight around six oclock evening After fairly short motor run model floated around surprising three minutes second flight little power caught thermal resulted unreal two-hour 15-mile chase During course flight model flew back over town circled high over own house awhile continued across town went OOS out-of-sight dusk set Luckily model found undam aged shortly thereafter farmer close lost sight prepared Internats left few days early could attend small contest northern Ohio way Detroit wanting risk new model newly installed DT dethermal izer set well short 10-minute maximum engine full revs went up like streak thermaled DTd flight racked up nearly 14 minutes take third place journeyed Detroit Selfridge AFB confident could compete anybodys league As ROG requirement early morning test hop field resulted unex pected seven-minute overhead flight terminated nice landing feet very fortunate bothered DT As conditions excellent immediately went official flight However engine stopped shortly after model broke ground resulting disappointing twominute flight After replacing faulty timer launched model its second official gained considerable altitude allotted 20 seconds pulling spectacular vapor trails early morning air model did easy 10-minute max some reason did DT last seen soar ing over nearby Lake St Clair chase boats present assigned retrieve errant models was recovered An Air Force chopper crew reported spotted model fit description colors down inaccessible swamp Canadian side lake couldnt recovered So twoflight total good 10th place medal model lasted nine days nine flights managed rack up hours flying time lifetime memories followed effort 55-in A-size version won several area meets before also eventually lost thick woods Another B/C model built 1951 number significant changes made intention ing improve breed resultant effort proved just average good contest model showing iptprmittent Continued on144 Hey Heres secret weapon increas ing attendance contest great food Lawrencevllie IL Club staged cook out eve October 14 contest terrific smoked sausage alumi nized potatoes enticements Contest entries double usual numbers Frank Roales photo Jim Richmond dis lays various awards receive~ World Championship-winning performance FlO World Champs held Nagoya Japan last October US team made unprecedented indoor clean sweep event taking three top places take Team Championship wuc v e ronu ho bb ya prod uc tsin PO Box 2480 0 Sandusky Ohio 44870 419 627-1877 fields Personally feel can plus hobby flying fields have lost result noise prob lems Most modern engines now shipped muffler very least muf fler available manufacturer separate item Additionally some excellent after-market mufflers avail able various configurations both conventional special applications such Helicopters Scale Racing should realize muffler design has its own characteristics noise reduction exhaust back pressure resultant performance Most model engine mufflers consist adapter bolts directly strapped engines crankcase fits tightly over exhaust stack adapt er transfers exhaust gases expan sion chamber large tube end expansion chamber outlet tube restricts flow thereby generating back pressure can use pressurize fuel tank Most generally back muffler pressure noise reduction given engine inversely proportional performance other words smaller outlet restriction less noise less performance Some mufflers particularly after-mar ket models available flow through version Unlike conventional configurations mufflers have opening front straightthrough tube covered another con centric tube forms outside expansion chamber Flow-through mufflers generally pro vide maximum performance muchlessened noise control Primarily used maximum performance events some muffler required such Club 500 Pylon Racing Next month will cover tuned pipes engine break-in idle settings other topics Please stay tuned FF Duration/Murphy Continued page 61 flashes its predecessors performance did garner number significant wins before being damaged retired As Ive never built same design twice other different sizes never tried constructing exact replica 1949 model Perhaps should have made exception case No pictures 49 job taken am enclosing three-view construction sketch photos similar 1951 version hope short story accom panying three-view might motivate other modelers recalling some memories Nostalgia Gas era aiding cause Nostalgia movement reference Bobs three-view drawing note differences between 49 51 models basically wing stab spans plus basic construc tion fuselages Should anyone inclined take up pencil scale draw up full size plans following additional info would helpful As wingthe top spars x / main bottom spar x rear spar x / LE blank A-in square tapered TE x 1 wing ribs Y,-in sheet double rib tip dihedral measured trailing edge 2 inner panel/tip joint poly hedral being 4 wing tip meas ured flat plane inner panel Note dihedral break moves out rib station 51 model stab material list specifies /16 x LE /16 x 7/ TE /16 x % bottom spar x top spar Stab ribs /16 sheet Neither fuselage construction what would call conventional dif ferences fairly well defined drawing 49 version incorporates X-shaped core center bottom horizontal components /6-in sheet vertical backbones %-in sheet / x hardwood motor bearers used 49 model K&B steel mounts latter design /16 sheet horizontal plan view outline moved downward become flat bot tom fuselage 51 model top backbone /16 x pylon core both versions both instances pylon entire fuselages planked /16-in sheet Bob states 49 model incorporated single-wheel LG 51 used both single- two-wheel arrangement various times foregoing should suffice proper duplication effort have fellas Supercharged Brown Jr oddball engines occasionally brought light dogged persistence some model engine collectors seem always accompanied some tall tale discov ery oft times just interesting engine itself Such case recently discovered Supercharged Brown Jr depicted photo accompanies months column took picture Bob Larshs find recent CIA Club meeting Bob subsequently narrated following story seems Bob heard rumors various sources over years two brothers name Scott quite active Control Line Indianapolis area during early Forties Following lead last sum mer hoped might bring him con tact Bob ultimately knocked door answered young man uniform US Navy Bob soon learn indeed located two brothers sought however gentleman recently passed away young 144 Model Aviation 54 now have plans available forthe famoun A-J Fireball Plans show six production vaaiants plus FOUR modified designs including Fireball Bipe Ihe heaulil, Sportster set also includes Fireball Floats instructions few other nice surprises Orderyour Fireball Plan PakTOOAY andstartbuildingyourownA-JAIRFORCE COLLECTIONPrice includes Mailing Tube First Class UPS delivery charges price complete $2500 Ad P0 Box 548 ilor actually son ecial leave Navy enable sposition household items operty itself just sold Fur ermore young man intended ss some 20-odd antique engines sorted modeling paraphernalia ash can very next morning want immediate solution Obviously ir man Robert offered fellow pedient alternative cleanup oblem Supposedly brothers owned casting business back Forties id being interested Control Line eed performed some hop-up exper ients various engines such cx riment apparently special rearurn-rotor downdraft-venturi arrange ent wild exhaust extension e Brown Jr shown photo b found engine finished Lrts another set unfin ied castings among other engines id accessories also numer sketches plans CL Speed odels drawn back sllpaper evidence brothers 4 quite successful extruding ry commendable 105 mph out Hornet iwered models 1945-46 era What really amazing though fact th brothers deaf mutes Since ither could hear would determine ak engine rpm settings placing nds model assessing engine ms models vibrations Unfortunately both brothers now ceased what amazing tales gine collectors can relateand love ery Thanks again Bob LM Champs date change 1985 t report stated 1985 Medera Champs would held June -20 time bonafide tes However Jack Jella SAM Champs tnager has since announced tes have now moved June 24-27 request Eastern Midstern modelers could accom date earlier schedule money rather lean toward ving dates further nmerto point returning vious schedule mid- late-July yway parts June simply too ly flying season expect peak rnpetition levels both engines dels after long winters layoff Most having similar climate have portunity stage maybe Timer contests point ng contest-ready SAM amps fleet mid-June exceptionaccomplishment say least [t understanding idea ving dates forward calendar s proposed possible remedy ape heat warmer climes Per ially think would prefer take inces heat rather models Signal Guard blocks random noise oft-frequency signals can cause loss control air land RC models Signal Guard responds sig nals its own precisely tuned fre quency ignoring static noise craft itself Plus additional amplification allows control operators visual limit want spend time flying less time money repairing crashed model Signal Guard answer Call toll-free 1-800-468-8215 order Signal Guard TM major credit card send $150 check money order m 1 riFTllSFF PO Box 30179 Portland OR 97230 Oregon call collect 503-257-0912 90 day warranW cted dealershIps avaIlable out trim engines wont start what know Im managementI just work here. See ya downwind Harry Murphy 3824 Oakwood Blvd Anderson IN 46011 CL Aerobatics/Fancher Continued page 70 understand affect overhang control feel necessary understand feel handle made up inputs both Up Down lines input line made up two elements actual tensionwhich have arbitrarily stated 15 lb per lineand vertical distance point tension force applied wrist hinge-point case will measure tension pounds distance components inches resulting moment being expressed inch-pounds Take look Figure II will notice horizontal line running wrist hinge-point horizontally through center handle large Plus above large Minus below median line distance measurement will taken Any lineattach point falling above line will considered positive value thus force overcome up maneuvers Any line-attach point below line will March 1985 145