Free Flight: Indoor

SUMMER Indoor Besides activities listed previous column significant activ ity Northwest Unfortunately nouncement mailed mid-Maytwo weeks too late included other announce ments Summer Indoor Meet Symposi um sponsored Willamette Modelers Club South Albany High School July 7-8 1990 Symposium program included presentations Andy Tagliafico Lew Gitlow Bruce Kim ball Lets hope future events will planned far enough ahead allow announced fair about contest part event announced Sanctioned Events Calen dar MA listings few Indoor events dedicated search would have found 25% chord r Tail Moment Arm Ad Alj 25% 7 chord MARGIN Chart explaining basics margin stability distance between CG AC expressed percent chord AC aerodynamic center CG center-of-gravity tail moment arm distance between 25% chord points wing stabilizer Great attendance have already read story World Championships/USIC/Nats Johnson City TN However final statistics may have available USIC US Indoor ChampionshipsEd 135 contestants continent major increase over past years seven World Champs contestants stayed compete USIC/Nats Ten entrants Canada US entrants came 27 states including eight Arizona California Oregon Washington provides interesting con trast comment Nats official several years ago said Indoor contestants wont travel support major contests Flying opportunities Heres note CDs PR persons will see listing late Au gust early September will threemonth gap due magazines Nats coverage Events listed below scheduled Septem ber through mid-December will over before can announced year will listed highly abbreviated form Competition News portion report Nats-coverage issue provided have formation no later September 5 1990 What need name phone number contact person whether event contest flying session sanctioned plan session dont know date let know anyway experiment good response can done time column displaced Nats coverage response good its going too much trouble Send information PO Box 830545 Richardson TX 75083 CaliforniaSan Diego Monthly sessions Cat Howard Haupt 3860 Eco chee Ave San Diego CA 92117 Kansas Special listing coming up Due justmentioned gap column publication sessions scheduled between late October end Topeka Look unsanctioned Indoor meets Stone Hangar site Sept 9 Oct 14 1990 Jack Koehlar 3425 SW Arrow head Rd Topeka KS 666143485 tel 1-913/272-8439 Continued page 182 76 Model Aviation Free Flight Indoor Bud Tenny Box 545 RIchardson TX 75080 Left New wing top vs old wing Buds Pennyplane Above Top view gear retract Stan Chiltons R0G Stick Tenny photos Left Side view extended gear timer Tenny photo Right long too long Prototype Jim Clems winning Federation ROQ * * Long Engine Life * * Use BRU LINE Air Cleaner Completely Fuel Proof Nylon Rubber Parts Cat No 102 Air Cleaner Coarse $275 Cat No202Air CleanerFine$275 Replacement Inserts Cat No 104 PkI2 Inserts Coarse $239 Cat No 204 Pkl2 Inserts Fine $239 FITS MOST ENGINES 25and UP SEE YOUR LOCAL HOBBY DEALER IF UNAVAILABLE LOCALLY SEND TO Bru Line Industries Inc o Box 3780 Center Line Michigan 48015 Add $2 50 sh pp ng M ch gan residents add 4% sales taxi change editors whims interest within club situation isnt detrimental except extent increases difficulty keep ing current grip information have always interest what other mod elers across country doing pursuit Free Flight activities newsletters excellent vehicle accomplishing sin gle significant advantage being colum nist puts center excitementeven though cannot always present wish thank contrib ute grass roots media purpose furthering Free Flight feel respon sibility column relay may significant interest larger audiences following have mentioned before some time have fan particular segment Fresno Model News currently edited Bill Booth Fresno Gas Model Club Sel dom does segment contain anything much would considered news technical pertinent informational viewpoint though caps human interest category am referring Corkys Corner usually single page issue gives wifes point view respect hubbys hobby Most items supplies club editor might overlook hectic tempo attempting adequately cover contest get little fly ing himself might choose offer little heartfelt sym pathy crashed models rather awestruck feats winners com ment about some toddler carries toy air plane everywhere making engine noises mouth attempting mimic authentic noises generated real toy airplanes dads granddads world Whos ill whos gotten well wife furnished great baked beans last club cookout has moved area has moved out old friendships renewed new ones made some ways socializing express ing mutual concern may important pect hobby Anyway Corky Mullen am great fan yours Please continue keep us straying too far reality thing Should readersand especially wives readerscare get womans viewpoint things men pursuit Free Flight fun might wish subscribe Fresno Model News 4215 E Clay Fresno CA 93702 Twelve dollars 12 issues will cover cost Meanwhile til next session see down wind FF Old-Timers/Baker Continued page 75 original possible Oh know some us too paid visit Jim Clems workshop once Witch Doctor-Country Boy Clem Speed Indoor Clem working Zipper using original plans structurally much improved P&W kit plans Because first Zipper had Dennymite hoped use time aroundand just old Dennymite same model same type tank right wheels having trouble finding exact type motor mount told him use Hayes ny lon Jim wouldnt consider ever flies Zipper will see hear smell like flew 1939 will payoff After Jim has enough tro phies can assure Recently saw short filler piece newspa per saying six people killed fight ing between remote tribes New Guinea dispute over prepare pig feast cel ebrate peace treaty got out hand Sometimet think disputes over rules categories ol model planes gets bit out hand too once small aquarium few Tiger Barb fish destroyed other trying estab lish dominance within such limited territory five gallons important Go fly model have some fun think Jim Clem once signed off letter Have nice transition today Yeah FF Indoor/Tenny Continued page 76 MarylandGoddard NAS Record Trials flying sessions scheduled auditorium Building 8 God dard NAS Saturdays 1200 noon 1000 pm Oct 20 Nov 3 1990 NASA security re quires attendees US citi zens AMA members li cense available inspection ai gate list compiled Tom Vallee must notify Tom advance meet Changes NASA launch sched ules other possible events can preempt auditorium out much warningbe sure Over 750 Select *7 1/4 Scala18 Sheets *eo Size38 5heets *40 Size38 Sheets *Propeller Decais WT snip e Sheets-3siZes 00 80 *Kiii Marhinas onlyte sheets *Nomenclature Markingo 3 Sizes-12 Sheets Biack White copy * Letters Numbers 10 coiors See color chart * Fiaas. American United Kinedom Contederate * Stars Comm 9 Sizes pius Shoal 01 Assorted Sizes * mm Sheets 4-3/4 -28 go 10 Coisro see color chart PRESSURE SENSITiVE R TRANSFER Authentic modei insianios pressare sensilise major decals mater transier tsr 1/4 scaie 40 80 size propeiier decais World War ii kiii mark ings stors hogs letters numbers trimU sheets I I LNORTHEAST SCREEN GRAPHICS 21 FiSHER AVE. EAST LONGMEADOW MA 01023 TEL 413-528-4110A AT LAST An Effective High Tech Engine Cleaner R/C Engines Removes Burned-On Fuel Residue Encrusted Carbon anteed ONLY $695 CA residents add 725% tax Clean Engines-Run Cooler-Last Longer Send Check Money OrderTo AIRBORNE HOBBIES 3764 30TH ST SAN DIEGO CA 92104 619543-9703 182 Model Aviation Electric Flight f Coetrollar Perfect 05 Motors 510 cells month Lightweight 12 OLmoney hack Adjuotohie switching pointguarantee Soideriess terminal ror easy hookup $24 ON/OFF Controller 95 Power nave weight high efficiency osty 806v toss 20 Size 22x13L63 Add SItO shipping Colitorsis residents odd 65% 1163 Too Send Check money order High Sky Foists oossnosoe3929 Kansas St #9 other OOOOOOtOtS oreSan Dleno CA 92104 sins avajishlo DECALS DEALEff S INQUIRES WELCOME verify Tom before leaving home Tom Vallee 444 Henryton So Laurel MD 20707 tel 1-301/498-0790 Vew Jersey Lakehurst NAS Record Trials FAI Trials Hangar #1 Lakehurst NAS Record Trials Aug 29 Sept 16 Oct 7 1990 FAI Regional meetsSept 1-3 1990 Note must reg istered East Coast door Modelers club advance event Contact Dan Domi na 6 Meadow Lane East Wind sor NJ 08520 tel 1-609/4482840 Gary Underwood 9 Treelawn Terrace Mercerville NJ 08619 tel 1-609/586-4441 registration info mail send photostat AMA license phone numbers well advance event want attend Pennyplane evolution wrap-up bottom inc saga major problem riginal model too much wing camber f photos composite comparing two kings best flight new wing LISIC 11 44good enough keep op five about two hours time made fourth official flight 50% improvement ver original model flown 88 USIC final official flight made negative stab incidence assumption model underelevated Wrong final analysis models current configuration nearly optimum owner just needs know tow pick rubber adjust model Lest forget Although wing too thick teveral other lessons learned 1 There absolutely must enough clearance Detween motor stick prevent rubber unching 2 The wing incidence set zero relative o stick centerline negative incidence stab nose rides high cruise help oad prop 3 All twist removed wing leav ng offset control torque has proved adequate handle full torque small amount left thrust used Left thrust set smallest amount needed prevent stalling luring burst As left thrust reduced limb turn opens slightly climb signif candy steeper loss climb speed 4 Very slight equal wing tip washout ised prevent tip stall improve models esponse turbulent air upsets due ceiling ouches ne thing typical problem models equiring high launch torque reverse stab tilt aused twisting motor stick tail boom rn Limited PP stiff up/down loads icry weak torsion stab twisted slightly o flies required tilt twisting oom Between automatic stab tilt left hrust model grooves perfectly level f launch torque has possible use vVheres CGPart H August 1990 col win introduced concept margin stabil ty Lets review looking Figure 1 figire shows critical components aerody ianiic stability 1 AC aerodynamic centera theoretical toint about external aerodynamic orces actContinued page 184 U m U U U U U I I I I I I I I U U I I U I I I I U U U U U U U I I I I I BIG GLOW FUEL MANUFACTURED WITh ThE PUREST FINEST QUALITY INGREDIENTS AVAILABLE * Superior Igniters Improve starting idle acceleration Youll notice power bargain fuels * Special Detergents Promote clean burning prevent residue buildup * Rust Inhibitors Protect engines corrosion After run oil needed engines * Film Strength Additives Increase lubricity provide extra lean run protection * Anti-Wear Additives Help keep engines running peak performance longer * Satisfaction Guaranteed FREE SHIPPING ON ORDERS OVER $1500 SIG CHAMPION 2-STROKE FUEL NTART 10 Nltrin oa 5d5 35% NitroF 5$2595 SIG PREMIUM 4-STROKE FUEL 10% Nitromethane$1325 15% Nitromethane$1525 THE CHOICE OF CHAMPION FLYERS over 20 years SIG has blending finest quality model engine fuel available using finest quality ingredients instance Methanol use 995% pure very best grade money can buy also use real 100% pure Nitromethane get full measure ye paid based honest percentage-of-volume method percentage weight SIG fuels con tain 50-50 blend Bakers purest AA Castor Oil new improved Klotz Techniplate Synthetic Racing Oil maximum engine lubrication protection Based experience sincerely believe finest quality fuel can made price dont take word try some judge yourselfp sobject chenge withoet notics See dealer firstl available order direct Call 800-247-5008 toll free orders Latest Catalog $300 SIG MANUFACTURING CO Montezuma IA 50171 •••••••ininininin ber 1990 183 I I I I I I I I I U I I U I I I U I I U U U I I I I I I U U BOB HOLMAN PLANS best scale 29 years Plans tram Englands leading scale modeleliers have plans have won everything BEST Show Toledo World Scale Meet Masters Plans Brian Taylor Dennis Bryant Thorpe BROS leading British magazines Catalogs Best Scale $500 Model Aircraft plans Handbook 1989-90 $500 Scale Drawings Plans Handbook $500 RC-Model World Plans Const Guide $500 Catalogs $400 3 shipped togethar order Please donot buy glass FW 190 Kit untill check quality glass work Bob Holman Kits Call BH 714 885-3959 Spit MK 1 69 AfPi Plans $2500A essories $6000 Shipping Messerschmitt 109E 68 Plans $3500 Accessories $6500 Shipping $500 Hawker Hurricane MK Plans $2500 Accessories $6000 Shipping $500 Dornier 17z 74 Plans $2400 Shipping $300 Heinkel 111 74 Plans $3100 Shipping $300 Ju 68 72 Plans $2250 Canopy $1000 Shipping $300 Messerschmitt BFI1O 71 Plans $2500 Accessories $2500 Shipping $500 50th ANNIVERSARY BATHE 2 CG center-of-gravityfore/aft balance point model complete rubber motor 3 Stability marginthe distance between CG AC expressed percent wing chord 4 Tail moment armthe distance measured tween 25% chord points wing stab CG location CG must always ahead AC shown model stable works like models weight acts down ward through CG aerodynamic forces act upward through AC model equi librium flight forces exactly balance model noses up aero force increases enough bring back level flight nose-down condition aero force reduces allowing tail drop distance between CG AC margin leverage aero forces have restore level flight margin drops zero model will have neutral stability will go whatever direction pointed until some outside force diverts CO behind AC model unconditionally unstable nose comes up will continue rise What about too much margin model has very high positive stability margin two undesir able things happen 1 The stability high little can stop After contact between outboard wing tip curved ceiling beam model chugs along turning obstruction invariably hangs up slides down curve optimum mar gin overwound model tends stall turn torque away obstacle con tinue flying 2 The angular difference between wing stab greater giving higher drag power required both climb cruise flight speed higher time high mar gin can help highly turbulent air higher speed helps model penetrate better Outdoor models correct stability mar gin fixed adding weight nose tail adjusting trim fix glide wing Indoor model can properly located respect CO possible set cruise trim new model almost perfectly few two test flights Once margin trim set always fly model same weight rubber used find its CG ballast plane keep same CG location Worlds lightest timer Two photos show works Stan Chiltons gear-retraction mech anism record-holding ROG Stick model shot shows top view retracted gear hinge mechanism other side view stop timer Well can see stop timer too tiny see tiny piece double-sticky transparent tape hinge mechanism both pivot torsion bar retracts gear Stan cocks timer using pair tweezers tape holds couple minutes Al though CO shift gear retracts model very stable shows no apparent ef fect retraction long last photo shows Jim Clems interesting experiments inspired rash loooong Federation ROOs Federa tion ROG no officially recognized AMA classEd prototype version 39 long overall proved slightly unwieldy Jim won individual honors Federation ROG USIC flying 34-in version 751 flight long ones seem fly just about like shorter ones except may have higher potential duration Slow Worm/Platt Continued page 81 happens find Out immediately Lets toss plane once want nice fin glide too close stall models teni toward stally glide get up ani out ground effect should tendenc turn right too pronounced though just tendency model too slov stally add shim under stab leading edge glide too fast divey add shim un der stab trailing edge Precut some hims same size forward stab mount put field kit ua glue place dont want crashed ship over shim compressed fel out Repeat tosses until glide looks good about turn doesnt match abovi descriptionalarm bells Find out th fuselage fin bent misaligned will affec glide circle must corrected youl never get ship flying properly higl speed power flights bring Lets say glide circle okay clos4 enough minor adjustment stab tilt gle fixed means can proceed ha next stage first power flights Set DT want about 20 30 sec onds point Set engine timer abou three seconds Start engine adjusting fo] slightly richer leanest setting Hold thi model around fuselage behind pylon aim dead wind about 80 up trip ha Continued page I8 iXX xxxxxxxxxxxx FREEDM 9O ONLY MUFFLER$1295 xEasily attached 25 108 size engine xsilencers FREEDOM 90 Muffler gives XAMA recommended 90 dBA 9, silencing Xnoise noise cornlaints Ensure X freedom fly Unchwlenged through 90s x FREEDOM 90 X Tested qualified US published engine reviewer Silences 50-98% engine noise WITHOUT POWER LOSSI Uc US SNUF-LER Patent #4858722 \I1SA AND MASTERCARD 1-800-NOW GO RC accepted Add $2S0 far 660-4872 I 2 weeks delivery time Made America II American Technology IdODa. 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