The author low-ceiling variant Top Cat 90 gossamerlike covering light silver gold Rodemaky microfilm LOW-CEILING version Top Cat 90 earlier Indoor model itself has set new standards consistency performance Top Cat 90L-1 became triple record holder single flight May 3 1991 established Category World Record still pending writing set new AMA FiD Stick records duration 3209 Top Cat 90 designed 1990 Indoor World Championships special challenges presented Johnson City East Tennessee State University flying site Having flown championships 1988 painfully familiar snaggy beams other hazardsropes bags ventsof ETSU site So set out design model could stay under 106-foot beams still fly longer 40 minutes incorporated features both Boron Bomber flown Nagoya 1984 original Top Cat flown Cardington 1986 did quite lot quarter-motor testing under 25-foot ceiling local Loma Linda Elementary School gymnasium before design came together its final form 50 Model Aviation Don Lindley left Bud Tenny right man processing booth ensure Top Cat 90 meets Fl D weight wingspan requirements 90 World Champs Bob Clemens photo featured adjustable VP variable pitch propeller boron prop ribs short tail boom small stabilizer asymmetrical wing rib camber Flight tests three prototypes indicated design goal would met very reliable VP propeller torque actuated has tiny 00-90 screw adjusting maximum high pitch able change pitch over rubber motors decaying torque curve slightly greater cruise thrust can maintained 1990 World Champs Top Cat 90 won Bronze Medal stole show Because its torque-actuated VP propeller model exceeded 40 minutes six official flightsa record can never broken very next day ship won National Indoor Championship month later claimed regional US team selection contest Moscow Idaho first time tried full motor testing gym Top Cat 90 set new Category AMA records FlD Stick recently selected National Free Flight Society NFFS Indoor Model Year 1991 Symposium Inspired ease other circle last touch 2359 model settled floor 3209 Since 150 turns unused average rpm flight remarkably low 357 Construction Unless youre experienced Indoor modeler youll have flying fun increase indicated wood sizes 20 30 percent Since plan gives dimensions Like its predecessor triple record-holding 1 06-gram Fl D design just keeps winningwith Category World Record still pending key its exceptional endurance outstand ing altitude control provided adjustable torque-actuated variable-pitch propeller EBob Randolph acquired two new Category records decided build low-ceiling version changes minor important 22 x 361/2 propeller replaced original 2214 x 40 motor stick shortened 1 /2 tail boom lengthened same amount also changed suspended stabilizer nonsoldered VP propeller hub details triple record-breaking May 1991 flight noteworthy another beautiful spring day Loma Linda California skies clear temperatures moderate humidity low air inside gym generally excellent although slow drift east low levels drift west top building After putting 1360 turns 12-in 070 tan rubber motor backed off 60 turns released model five feet above floor slowly lost altitude almost two minutes leveling off three feet Finally three minutes prop smoothed out ship began slowly gaining altitude Everyone breathed easier Top Cat reached beams 944 continued tap gently about September 1991 51 Bud Romak 1976 FiD World Champion helps count unused turns after half-motor test flight 1990 world contest authors view partial test motors must Top Cat 90 named Indoor Model Year 1991 NFFS Leif Englund photo Out box ready fray Team Manager Andy Tagliafico timers Walt Van Gorder Les Garber stand box decorated 84 WC Bob Clemens photo part figuring adjustments should easy way learn build light strong models building lots making little lighter may prejudiced honestly believe props will improve performance FiD ship fact may choose make just prop Ive used design try own model reason because variable-pitch props unique boron ribs require detailed explanation Ill discuss first Propeller adjustable VP hub combines Cezar Bankss idea using MonoKote hinges Larry Cailliaus concept solderless construction own idea using nylon adjusting screws Begin cutting out three 1116-OD aluminum washers side soda beer can hole must drilled undersized carefully reamed larger exactly fits 013 prop shaft wire Using hammer drift pin anvil strike shaft approximately thrust washer will go deform 015 Slide washers hook end shaft until stops deformed area Align washer shaft glue lightly Krazy Glue Make driver arm 012 wire 009 gap butt joint center Slide driver ann front end shaft align next washer again glue lightly Krazy Glue next step build up CyA cone over driver arm washer front side shaft best done shaft held vertically vise hook end up Put drop CyA waxed paper dab small amounts pin will take four five applications build cone Wait CyA set between applications use guitar strings music store 009 music wire drive pins spring idea borrowed Rick Doig Take along micrometer check size Bend spring nine coil turns other two washers youve already made glued hub make wobble-free bearings cutting off end prop shaft sure remove burr tapered prop spars must mate perfectly wooden hub hinge overlap Align hub spars flat surface lightly tack glue together using Ambroid thinned acetone Since use translucent orange MonoKote like mark prop size identifier 22 x 355-1 spar MonoKote hinge will cover protect Cut -in strips MonoKote iron place take care crush wood use wifes lightest iron set high cotton Use sharp razor trim MonoKote leading trailing edges Continued page 158 52 Model Aviation Top Cats climb angle shallow high initial torque variable-pitch prop decreases pitch torque drops off allowed ship climb slowly 16 18 mInutes level off just under 106-foot beams Johnson City ETSU site Bob Clemens photo Top Cat about launched model won Bronze Medal 90 WC six official flights exceeded 40 minutes best time 4207 Bob Clemens photo IOtIcuIarnauIv IJcrIuIIaIIc uc uu.n,.ontest rIrOl successes encouraged author design low-ceiling version aob Clemens photo BATFERY MANAGEMENT System MOSFET nicad cycler $18995 MOSPET nicad ccler designed specifically planes boats helicopters 3 overnight/trickle outputs capable charging 1 9 cells infinitely adjustable RX overnight charge current ability discharge both tiX TX packs digital discharge timer 3 outputs allow simultaneous separate charging lOt TX AUXILIARY eg glow plug starter battery nicads Nicads will charge overnight rate 17 hours 4 minutes before automatically switching trickle rate Adjustable control allows charging fiX pack up 2000 mAli capacity TX output can discharge 8 9 cell packs 300 mA fiX output can discharge 4 5 cell packs 300 500 mA True Constant Current sources used charge/discharge modes power up fiNS ONE will always come up overnight charge mode ensuring fully charged battenes event momentary 110 volt power loss Utilizing Current Detection Circuitry LEDs can illuminate current actually flowing out batteries Large digital display anti-glare filter shows RX TX discharge times Unique CAPACITY CALCULATOR will allow milliampere-hour rating batteries determined RK ELECTRONICS nNOVATIVE ELECTRONICS 3O Fox Run Hudson Ilew Iflampehire 03051 882-6022 local merchants make toy runs Getting calendar early helps ensure event can advertised along other Toys Tots events announced radio TV should help us reach beyond basic modeling audience improve public image Flying Circuits club membership has averaged between 100 120 members three years have held Toys Tots event have averaged about two toys donated per member challenge club better whether club collects toy thousand remember toy collected helping needy child community afterglow goes well beyond scorecard Want get started Get touch nearest Marine Reserves recruiting station find out get involved have near consider contacting local churches charity organizations similar mission ask can help real key get involved Prepald Orders Muney Order Certified Check Shipping & handling $500 COD Orders Cash Certified Check collected deliwry Add $350 abow amounts DEALER IfQVIWES IPIVITED Prices Specifications Subject Change Without Notice Designed manufactured USA community Dont limit yourselves Christmas gifts either Chances have local charities such childrens shelters area could use some help time year Enlist support local hobby dealer other area merchants events Short free donation can still help discounts merchandise destined charity can help other ways such distributing flyers advertising event possibly letting use photocopiers some other services help prepare flyers support docs have toys money organizations could simply use good old-fashioned manpower involvement project Get reputation helping out clubs good reputation earned demonstrated active involvement community help projects certainly wont hurt next time get pressure about flying site Dont forget get announcements local newspaper radio TV community affairs bulletins worthwhile cases toys collected distributed Marines Christmas toys some children RADIO SOUTH 5524 N Palafox Pensacola FL 32503 PRO HINGESSpecial Paper Easiest Hinge Install tic . No special hinge slotter needed r No alignment necessary inning messy epoxyInstant glues neededecal Paper RC $24SIpkg 18 e S449Ipkg 24 lot us cyanoacrylat adhesives available local hobby shop call 904-434-0909 see hobby RC modeling want funded discretionary funds need Too people communities still have needs preclude giving gifts Christmasor other time year Simply channeling some discretionary RC funds couple toys will giving needy child treasured giftD FF Top Cat/Randolph Continued page 52 hinge Dissolve tacked-on glue liberal amounts acetone allow hinges freedom movement MonoKote bond will affected Make L-pins about eighth-inch overlength Glue spars Slip shaft onto hub youll need exert preload torque driver can slipped onto pins Make fit adjust-and-screw assembly lines up driver arm has clearance both spring end prop spar end nylon adjusting screw must sanded filed flat prevent driver arm slipping off screw end high torque prop blades built flat cardboard female template boron ribs must broken off can accurately positioned prop outline extending beyond Glue ribs leading trailing edges taking care keep flat Glue balsa spacers under boron rib spar centerline glue has dried mark exact centerline felt-tipped pen Tack glue prop spar prop block 40-in pitch Top Cat 90 36-in pitch 90L-l Glue ribs tip end hub Line up several ribs marks spacers over center spar Working rib section time wet outline glue ribs spar Wet entire outline again will hold helical shape block assembly has dried remove block fasten other blade same manner prop frame complete except putting camber ribs Place prop building board rear blades facing upward its tip end closest Beginning tip glue length Kevlar leading edge positioning directly over first rib Still working over rib tension Kevlar obtain desired camber squeezing just past trailing edge Glue trailing edge make sure tension correct glue again crosses spar Trim off excess Kevlar once glue dry little practice procedure becomes quite easy Take word boron prop ribs unequaled strength lightness use Triple-R blue microfilm 158 Model Aviation CARBON FIBER LAMINATES 007 014 022 & 030 Thick WROHACELL Light Rigid Foam 1 2and 3mm GLASS CLOTH 58 ozisq yd 75 15 20 30 & 4 oz CARBON OR KEVLAR MAT 2 4 5 oz/sq yd CARBON FIBER NO FRAY TAPE CARBON FIBER RIBBON KEVLAR FABRIC TAPE KEVLAR FABRIC 17 ozIsq yd E-Z LAM Epoxy Laminating Resin Send SASE complete listing products AERO5PACE Composite Products PO Box 16621 Irvine CA 92714 714 250-1107 Source Lightweight Materials Rodemsky makes solution Bud Romak pours apply Though two members ad hoc team have won FiD World Championship title Im doing best correct deficiency achieve uniform pitch smooth running place propeller prop block during covering Theres trick making microfilm stick boron ribs Moisten brush saliva flick end across boron small droplets form -in intervals along rib length blow down gently material applied Wing Construction conventional except tips boron-stiffened wing posts Kevlar bracing use old-fashioned built-up compression ribs because can withstand high-torque strain produced variable pitch Since ribs tapered merely sliced off sanded Cut wing spars dihedral points tack glue flat Bend wing tips around 1-in-dia heated curling iron make small radius curves Mark center arc felt-tip pen moisten wood lips before bending Youll have repeat several times since wood tends spring back somewhat Cover wing flat work surface add trim Carefully brush dihedral joints acetone bend glue wing correct dihedral angles Add two boron reinforcements wing posts essential stiffen posts adequately achieve good fit tissue wing sockets repeatedly snap micrometer post ends until theyve squeezed down 058 inches bracing may seem excessive gives stiff wing prefer weight drag Kevlar negligible center rib will have too little camber after wing has braced Correct gluing tensioned Kevlar bowstring under rib using almost same technique prop rib camber Motor stick tail boom made metal forms following standard soaking rolling baking procedures glue seams boron using hypodermic needle avoid curved tail booms can result glue shrinkage employ Joe Foster technique Mount large end boom form horizontally vise Slip baked boom onto form clamp down small end form about three-sixteenths inch produce bow Glue seam along top form shrinkage will straighten seam once glue has dried Rudder trailing edge rudderand-post 45/s x 27 x 381iooo leading edge 8-in length boron Pierce SHIPPING & HANDLING UPS Ground Continental US $495 UPS Air & Parcel Post $495 plus 10% Subtotal Continental US UPS Neat Day Air $1400 plus $100 per lb Shipment total 000 add $395 Foreign Orders Parcel Post Air $495 Subtotal US Mail $495 plus 10% Subtotal September 1991 159 ACPs Advanced Lightweight Materials Cleveland Giant Scalesi T SCALE BUFFS *_________ Worlds Largest Gas Ptans Assartm INTERNATIONALLY FAMOUS C-D OUALITY MASTER MODElS PLANS 5S66e,ORllC 21 $48. 8COOOICMPBYSA$6O 72 Coo 02U14 361556 104 Ceo Cal PBT5A $7462 Hoeed Ree lIe$4S 96 Wig1lNOeyReee $56 o77 oeng B17G Fe$$2 52 WWI2l Red 1 $56 105 Bee B17G Fee $6591 77WWOlel2l Red 3 $6868 Do,g 046A Obe$46~ 84 Fekke 07 Fl $49. 108 Sike S38 Aoph$62 60900049~e ReeR$42.60 Boe 100 Spell $48 70 Boyle GeeBee $56.90 Boc 100 SpoIl $62 80 S,peo~eioe S6B$38 90 SiOC4Lee Willg$62 S950pelole6ne 568 $5280 Molifl 74 T4Ml $52 63 k P68 $5679 HPg 0600 Beo6$56 94 CRek P69 Fl $68 104 HPge 0400 Bo~$65 62 lecklleed Vego $35 65 MChi,e Clippe $66 74 OeRlillle 05 1 558 .07 MChille Clippe $80 95 MeeeeoPe Spel $$4-66 Weell Whjleind $43 80 Hell Op 8,Ildeg $58 -68 Ryon Nocee $46 107 Aeo,ea CS 5p$48 69 BBellolloo V $44 61 0ogIe 038 Gb $3477 Loee0be Sedee $35 122 Oo,glo 036 Ob$5875 N AM Ich 4 $62 94 Pege Cool Roee$$O65 M Mooode B 26$62 71 Molill 810 8eb $44 81 OH MO9, le 84 $50 78 00111lC WW Ree$SS156 OH Moq, Be04$a$ oo Oohk 91 1C2 $48 98 Slee PTI 76oyde$5$. 94Co Ge1I 911C5$6000 N 811 W 961 $75 06 DePee Co,el 8o1$44 71 Oeog DC S Tee $56 oecMM,Iligefl $44 OS Deog DC S Ton $64 94 HeM Molligen$56.86 1 Teeece 13$52 6SBeeilg 926A 91154$ lO8CoOS0l/4 I6S$88 84 Boeing 9264 Fl $5860 Deoglo MS MoI$32 69 Woe C6 Cobb $44 68 BileI Beildeg Pl$44 64 BeeS C178 Slog $4459 Boell8oeMLA $48 96 Beech C17B Oleg $56. 107 FBP$58e. 53 lel 11 Elecne $3873 Toeel AbI 6000 $34 82 leek 11 919e $46 107 Mell MB1 8ee $58 62 SIlIcon 9W SB7 $45 9191 81 SIeell TIW 387 $55 108 122 SineenT WSR7$66.90W 39 8491 P11 928 $32 73W 78 BileI Fl P28 $44 ITO 116 0lIleI F 92-B 558ST F 8 74TLFeeeeSpee $5676FedTon,4AT $66 65 SkyocIe 99591 $36 114 Fe6 TIel 4AT$72* 36 C0 We1b 940 $36 84 BeI-Jeyce l9J2 $52. 78 leek LighIng F58$45 95 leening C2Anp1 $65 36 Rep SeeS, Ae$36 58Go,J2F Doek $55 epOReB Anp1 $50 78 DonJSF Ocek $68 106 Fip~ 25 Cob $5259 Gelhe Dlv Bee $32 98 leek Hoden Bnlb$48 11709110 Dlv Bon$4O-. 63 0011 969 Belleel$4O 68 BonWinkle Bid $45 9008 82 Oboe Melb$SS54 Col Soo5 09934 $55 NeSeldTbeoeelee- Ficeoobjeelleellellge acre PRICE IlelCeThe 91eeT9X elr 3ee 1200 Olbre 6 75 Fell mel SOc UP Add 10% leo11 edee Fe ehippieg & b, ele e USA CeeSMee EIeehee IC 15%I25% ei1 Fee,eleeelegB200lecIodeeFeeLel1 F,eelal eee,en elene 8100 bya~ fee gIl odd 81 00 CLEVELAND MODEL & SUPPLY Co B808B OETROIT AVE CLBYBI884a OSlO 44182 Phece Be.c lB 30Ph19 te 8858 m339 MEYS HI TECH HOBBY INC White Pond Rd Stormville NY 12582 Introduces. AcuScaleAccurately Scaled R/C Aircraft Plus Full Line Hobby Shop Supplies 1/10 Scale A6 Intruder 1/16 Scale B-17 Electric Span 636 Length 655 ht 9 11 lbs Fiberglass Fuse Cores w/Molded Fiberglass Skins Precut Farmers chable Wings Vocuf armed Canopy Much Morel Uses Dynamos Fan72 90 Size Engine Intro Price350 post /~ end boron glue place glue has dried bend boron around pierce other end holding place gluing Glue boron adjusting arm install horizontal Keviar brace before covering also make razor slot post ends before covering makes easier adjust stab later Cover rudder placing film frame wetting outline Trim microfilm hot wire acetone Stabilizer Cut spars tapered wood join two halves means scarf splice glued CyA Install three ribs Lay flat surface covering trimming Tall assembly Shim up leading edge stab its centered boom end glue place Position glue rudder boom 0003 tungsten stab bracing attached left side boom away Span 7175 Length 56 Converted Gas Fiberglass Fuse Cores w/Molded Fiberglass Skins Precut Farmers Vacaformed Cowlings Mach 4/05 Motors Intro Price425 rudder Insert boom motor stick Use jig provide /~ negative incidence glue place Wing sockets center-of-gravity remains locate drill holes wing sockets Weigh model Make dummy motor weight 125 times amount dummy weight wing Tack glue dummy motor weight onto stick midway between prop shaft hook tail hook Move wing weight around until can balance model 56% wing front post mark socket locations center-of-gravity location compensates small stab short tail boom extremely high prop pitch launch provide necessary stability holes sockets go way through stick must carefully drilled achieve -in stab tilt required VP propeller adjustment Measure torque required cruise level flight flight testing Remove prop adjust preload tension hinges just begin open low pitch torque applied prop shaft test flights find motor length size will use up almost turns descending top altitude call optimum motor old standardone-third row knots landingshould used Avoid overclimbing site Back off turns reduce launch torque work up slowly top altitude Make additional test flights using optimum motor back off less time open high-pitch screw achieve climb begins minimal altitude gain use torque value flights Youll find torque kept constant small adjustments high-pitch screw will result outstanding altitude control Low-ceiling problems Propeller adjustment low-ceiling flight remains same flying however critical climb rate must reduced factor almost four avoid ceiling makes initial climb rate close zero have found smallest difference blade pitch high launch torque will cause oscillation loss altitude Also launch speed attitude crucial very little forward thrust must provide some airspeed launch wing stab can take hold Finally must take care own body turbulence doesnt ruin launch 0-rings opinion absolutely essential allow transfer wound motor torquemeter model loss turns torque use two 0-rings full motors partial motors Partial motors Different flying sites andlor weather conditions will alter power requirements Whether fun session record trials contest task Continued page 162 Modelers ice High Quality Convenient Size fl Modest Price NO SO K 2CMeS NOTSO KWiK 25 Minute Eposy U dealer caii 513-385-7398 order direct add $200 postage NOTSO KWIK 20 Mm EPOXY lOoz $995 Gas Model Products 8773 Russet Dr Cincinnati OH 45251 160 Model Aviation Coming Soon. Electric -130 tric OV-1 DA Bronco r Etendard Duct Fan na A-37 Duct Fan Call 914 878-75239am 3pm est 914 219-32704pm 8pm est Maleslam Gdin Recognisad ____ CSA certifiedAede,e NoFile No.Ld POwer E26226LR25154PodscfsIec Only certified checks money orders accepted Minimum Order 01400 for tirree packaaesof 4 Pomerpoies 10400 per package 0200 shippine haedijngi cr residents add saics tao Prices subject change notice DEALER INQUIRIES INVITED Par further information deaier pr ces seed SASh Susiness card SERMOS R/C SNAP CONNECTORS Inc Cedar Corners Station Box 16787 Stamford CT 06905203 322-6294 Catalogs Best Scale $500 Model Aircraft Plans Handbook 1990-91 $500 Scale Drawings Plans Handbooh $500 RC Model World Plans Coos Guide $500 Catalogs $400 ea 3 ot shipped together order BOB HOLMAN Kits Call 714 885-3959 New 138 pg GERMAN PLAN BOOKS $600 Other Catalogs Please add $2 00 Shipped Separately THE BEST IN SCALE Over 25 Years ServicePlans -Eposy Scale Documentation Btitish Magazine Plans Winners Toledo- Master Internals & / MC finding new optimum motor length size faster safer partial test motors used concept simple As example quarter-size test motor requires test stick exactly three-fourths distance between hooks weighted exacfly three times lubed weight quarter-motor Since one-fourth full motor turns can put model should climb one-fourth its previous altitude fly one-fourth time good news four times test flights can made bad news errors induce through inaccurate procedure faulty estimation altitude will compounded Most modelers overrate ability estimate aircrafts altitude like run helium balloon up beams mark line exacfly 50 percent 25 percent locations helps make better height estimates Once Im fairly certain optimum length size test quarter-motor prefer verify half-motor time permits 1985 US team selection finals Akron Ohio pressed time went directly 1050 quarter-motor test flight fullmotor official flight 4317 Still three seconds away perfect correlation Finding myself same situation flying Top Cat 90 1990 Nationals went straight 1023 quarter-motor test winning flight 4129 again deviating perfect correlation just three seconds think youll agree partial-motor testing has great merit Often full-motor flights will slightly higher longer because warmer air near site ceiling Easy build adjust fly National World record-holding model has brought great pride pleasure hope will same Recommended Indoor Suppliers 0 Indoor Model Supply Box 5311 Salem OR 97304 Micro-X Products 5200 Seven Pines Drive Lorain OH 44053 FAI Model Supply FM tan rubber Box 3954 Torrance CA 90510 Erv Rodemsky microfilm 1600 Rockspring Place Walnut Creek CA 94596 Bob Oppegard rubber cutters 140 East Golden Lake Lane Circle Pines MN 55014 E FF Duration/Haught Continued page 55 operation highly recommend products Quality service support excellent SASE 1337 Pine Sap Court Orlando Florida 32825 will get latest information Despite fact conceived quickie model whipped together few weeks prior Team Finals Sheety Idea has exceeded expectations serves very aicely fly-anytime model may worth serious look needing trainer-type model quickbuilding replacement airplane High-dollar emergency Shuriken CS engines raises questions far what future holds Gas AMA event admit better product form progress arrival engines scene threatens nature event fact engines drastically change economics event could ruin AMA Gas event would afford beginner fair chance compete terms so-called expert would beginner Power fly Pee Wee 30 Possibly areas so-called beginners event hotly contested field competitors aforementioned experts After PeeWee 30 would still no transition event someone wishing make progress competition TIireb4rIJl RIC Idle-Bar Glow Plugs Long Short $209 Only Also. Traditional line non-idle bar Glow Plugs Six Types 3 Heat Ranges High Performance Glow Element Blow Proof Seal Swanson Associates PO Box 151 Wayne NJ 07470 Only $169 F VALUABLE COUPON Flying paper CORSAIR $400 2 $6 10 $12 Build Fly just 2 I-lou - All pails Pie Cut & Painted W Vi nch WngSpan El 6 inch Proplii WthMotoiPQWUI KIT g 300a planes $18 $23 Foreign Refundable what order over $25 RC paper airp1arie PAPER AIRPLANES 433 NIHOA STREET KAHULUI HI 96732 USA Send w/oder-or pijer pCane 4L 162 Model Aviation Experience Excitement Lanier RC TR-260 An ARF Aerobatic Enthusiast Fuselage Length 44 Wing Span 60 Flying Weight 6 7 lbs Area 620 sq Rec Engine Size 45 60 Radio Channels 4 60- 914 Stroke Send SASE FREE Color Catalog PO Box 458Phone 404-532-6401 Oakwood GA 30566 FAX 404-532-2163 Designed Manufactured Americal
Edition: Model Aviation - 1991/09
Page Numbers: 50, 51, 52, 158, 159, 160, 162
The author low-ceiling variant Top Cat 90 gossamerlike covering light silver gold Rodemaky microfilm LOW-CEILING version Top Cat 90 earlier Indoor model itself has set new standards consistency performance Top Cat 90L-1 became triple record holder single flight May 3 1991 established Category World Record still pending writing set new AMA FiD Stick records duration 3209 Top Cat 90 designed 1990 Indoor World Championships special challenges presented Johnson City East Tennessee State University flying site Having flown championships 1988 painfully familiar snaggy beams other hazardsropes bags ventsof ETSU site So set out design model could stay under 106-foot beams still fly longer 40 minutes incorporated features both Boron Bomber flown Nagoya 1984 original Top Cat flown Cardington 1986 did quite lot quarter-motor testing under 25-foot ceiling local Loma Linda Elementary School gymnasium before design came together its final form 50 Model Aviation Don Lindley left Bud Tenny right man processing booth ensure Top Cat 90 meets Fl D weight wingspan requirements 90 World Champs Bob Clemens photo featured adjustable VP variable pitch propeller boron prop ribs short tail boom small stabilizer asymmetrical wing rib camber Flight tests three prototypes indicated design goal would met very reliable VP propeller torque actuated has tiny 00-90 screw adjusting maximum high pitch able change pitch over rubber motors decaying torque curve slightly greater cruise thrust can maintained 1990 World Champs Top Cat 90 won Bronze Medal stole show Because its torque-actuated VP propeller model exceeded 40 minutes six official flightsa record can never broken very next day ship won National Indoor Championship month later claimed regional US team selection contest Moscow Idaho first time tried full motor testing gym Top Cat 90 set new Category AMA records FlD Stick recently selected National Free Flight Society NFFS Indoor Model Year 1991 Symposium Inspired ease other circle last touch 2359 model settled floor 3209 Since 150 turns unused average rpm flight remarkably low 357 Construction Unless youre experienced Indoor modeler youll have flying fun increase indicated wood sizes 20 30 percent Since plan gives dimensions Like its predecessor triple record-holding 1 06-gram Fl D design just keeps winningwith Category World Record still pending key its exceptional endurance outstand ing altitude control provided adjustable torque-actuated variable-pitch propeller EBob Randolph acquired two new Category records decided build low-ceiling version changes minor important 22 x 361/2 propeller replaced original 2214 x 40 motor stick shortened 1 /2 tail boom lengthened same amount also changed suspended stabilizer nonsoldered VP propeller hub details triple record-breaking May 1991 flight noteworthy another beautiful spring day Loma Linda California skies clear temperatures moderate humidity low air inside gym generally excellent although slow drift east low levels drift west top building After putting 1360 turns 12-in 070 tan rubber motor backed off 60 turns released model five feet above floor slowly lost altitude almost two minutes leveling off three feet Finally three minutes prop smoothed out ship began slowly gaining altitude Everyone breathed easier Top Cat reached beams 944 continued tap gently about September 1991 51 Bud Romak 1976 FiD World Champion helps count unused turns after half-motor test flight 1990 world contest authors view partial test motors must Top Cat 90 named Indoor Model Year 1991 NFFS Leif Englund photo Out box ready fray Team Manager Andy Tagliafico timers Walt Van Gorder Les Garber stand box decorated 84 WC Bob Clemens photo part figuring adjustments should easy way learn build light strong models building lots making little lighter may prejudiced honestly believe props will improve performance FiD ship fact may choose make just prop Ive used design try own model reason because variable-pitch props unique boron ribs require detailed explanation Ill discuss first Propeller adjustable VP hub combines Cezar Bankss idea using MonoKote hinges Larry Cailliaus concept solderless construction own idea using nylon adjusting screws Begin cutting out three 1116-OD aluminum washers side soda beer can hole must drilled undersized carefully reamed larger exactly fits 013 prop shaft wire Using hammer drift pin anvil strike shaft approximately thrust washer will go deform 015 Slide washers hook end shaft until stops deformed area Align washer shaft glue lightly Krazy Glue Make driver arm 012 wire 009 gap butt joint center Slide driver ann front end shaft align next washer again glue lightly Krazy Glue next step build up CyA cone over driver arm washer front side shaft best done shaft held vertically vise hook end up Put drop CyA waxed paper dab small amounts pin will take four five applications build cone Wait CyA set between applications use guitar strings music store 009 music wire drive pins spring idea borrowed Rick Doig Take along micrometer check size Bend spring nine coil turns other two washers youve already made glued hub make wobble-free bearings cutting off end prop shaft sure remove burr tapered prop spars must mate perfectly wooden hub hinge overlap Align hub spars flat surface lightly tack glue together using Ambroid thinned acetone Since use translucent orange MonoKote like mark prop size identifier 22 x 355-1 spar MonoKote hinge will cover protect Cut -in strips MonoKote iron place take care crush wood use wifes lightest iron set high cotton Use sharp razor trim MonoKote leading trailing edges Continued page 158 52 Model Aviation Top Cats climb angle shallow high initial torque variable-pitch prop decreases pitch torque drops off allowed ship climb slowly 16 18 mInutes level off just under 106-foot beams Johnson City ETSU site Bob Clemens photo Top Cat about launched model won Bronze Medal 90 WC six official flights exceeded 40 minutes best time 4207 Bob Clemens photo IOtIcuIarnauIv IJcrIuIIaIIc uc uu.n,.ontest rIrOl successes encouraged author design low-ceiling version aob Clemens photo BATFERY MANAGEMENT System MOSFET nicad cycler $18995 MOSPET nicad ccler designed specifically planes boats helicopters 3 overnight/trickle outputs capable charging 1 9 cells infinitely adjustable RX overnight charge current ability discharge both tiX TX packs digital discharge timer 3 outputs allow simultaneous separate charging lOt TX AUXILIARY eg glow plug starter battery nicads Nicads will charge overnight rate 17 hours 4 minutes before automatically switching trickle rate Adjustable control allows charging fiX pack up 2000 mAli capacity TX output can discharge 8 9 cell packs 300 mA fiX output can discharge 4 5 cell packs 300 500 mA True Constant Current sources used charge/discharge modes power up fiNS ONE will always come up overnight charge mode ensuring fully charged battenes event momentary 110 volt power loss Utilizing Current Detection Circuitry LEDs can illuminate current actually flowing out batteries Large digital display anti-glare filter shows RX TX discharge times Unique CAPACITY CALCULATOR will allow milliampere-hour rating batteries determined RK ELECTRONICS nNOVATIVE ELECTRONICS 3O Fox Run Hudson Ilew Iflampehire 03051 882-6022 local merchants make toy runs Getting calendar early helps ensure event can advertised along other Toys Tots events announced radio TV should help us reach beyond basic modeling audience improve public image Flying Circuits club membership has averaged between 100 120 members three years have held Toys Tots event have averaged about two toys donated per member challenge club better whether club collects toy thousand remember toy collected helping needy child community afterglow goes well beyond scorecard Want get started Get touch nearest Marine Reserves recruiting station find out get involved have near consider contacting local churches charity organizations similar mission ask can help real key get involved Prepald Orders Muney Order Certified Check Shipping & handling $500 COD Orders Cash Certified Check collected deliwry Add $350 abow amounts DEALER IfQVIWES IPIVITED Prices Specifications Subject Change Without Notice Designed manufactured USA community Dont limit yourselves Christmas gifts either Chances have local charities such childrens shelters area could use some help time year Enlist support local hobby dealer other area merchants events Short free donation can still help discounts merchandise destined charity can help other ways such distributing flyers advertising event possibly letting use photocopiers some other services help prepare flyers support docs have toys money organizations could simply use good old-fashioned manpower involvement project Get reputation helping out clubs good reputation earned demonstrated active involvement community help projects certainly wont hurt next time get pressure about flying site Dont forget get announcements local newspaper radio TV community affairs bulletins worthwhile cases toys collected distributed Marines Christmas toys some children RADIO SOUTH 5524 N Palafox Pensacola FL 32503 PRO HINGESSpecial Paper Easiest Hinge Install tic . No special hinge slotter needed r No alignment necessary inning messy epoxyInstant glues neededecal Paper RC $24SIpkg 18 e S449Ipkg 24 lot us cyanoacrylat adhesives available local hobby shop call 904-434-0909 see hobby RC modeling want funded discretionary funds need Too people communities still have needs preclude giving gifts Christmasor other time year Simply channeling some discretionary RC funds couple toys will giving needy child treasured giftD FF Top Cat/Randolph Continued page 52 hinge Dissolve tacked-on glue liberal amounts acetone allow hinges freedom movement MonoKote bond will affected Make L-pins about eighth-inch overlength Glue spars Slip shaft onto hub youll need exert preload torque driver can slipped onto pins Make fit adjust-and-screw assembly lines up driver arm has clearance both spring end prop spar end nylon adjusting screw must sanded filed flat prevent driver arm slipping off screw end high torque prop blades built flat cardboard female template boron ribs must broken off can accurately positioned prop outline extending beyond Glue ribs leading trailing edges taking care keep flat Glue balsa spacers under boron rib spar centerline glue has dried mark exact centerline felt-tipped pen Tack glue prop spar prop block 40-in pitch Top Cat 90 36-in pitch 90L-l Glue ribs tip end hub Line up several ribs marks spacers over center spar Working rib section time wet outline glue ribs spar Wet entire outline again will hold helical shape block assembly has dried remove block fasten other blade same manner prop frame complete except putting camber ribs Place prop building board rear blades facing upward its tip end closest Beginning tip glue length Kevlar leading edge positioning directly over first rib Still working over rib tension Kevlar obtain desired camber squeezing just past trailing edge Glue trailing edge make sure tension correct glue again crosses spar Trim off excess Kevlar once glue dry little practice procedure becomes quite easy Take word boron prop ribs unequaled strength lightness use Triple-R blue microfilm 158 Model Aviation CARBON FIBER LAMINATES 007 014 022 & 030 Thick WROHACELL Light Rigid Foam 1 2and 3mm GLASS CLOTH 58 ozisq yd 75 15 20 30 & 4 oz CARBON OR KEVLAR MAT 2 4 5 oz/sq yd CARBON FIBER NO FRAY TAPE CARBON FIBER RIBBON KEVLAR FABRIC TAPE KEVLAR FABRIC 17 ozIsq yd E-Z LAM Epoxy Laminating Resin Send SASE complete listing products AERO5PACE Composite Products PO Box 16621 Irvine CA 92714 714 250-1107 Source Lightweight Materials Rodemsky makes solution Bud Romak pours apply Though two members ad hoc team have won FiD World Championship title Im doing best correct deficiency achieve uniform pitch smooth running place propeller prop block during covering Theres trick making microfilm stick boron ribs Moisten brush saliva flick end across boron small droplets form -in intervals along rib length blow down gently material applied Wing Construction conventional except tips boron-stiffened wing posts Kevlar bracing use old-fashioned built-up compression ribs because can withstand high-torque strain produced variable pitch Since ribs tapered merely sliced off sanded Cut wing spars dihedral points tack glue flat Bend wing tips around 1-in-dia heated curling iron make small radius curves Mark center arc felt-tip pen moisten wood lips before bending Youll have repeat several times since wood tends spring back somewhat Cover wing flat work surface add trim Carefully brush dihedral joints acetone bend glue wing correct dihedral angles Add two boron reinforcements wing posts essential stiffen posts adequately achieve good fit tissue wing sockets repeatedly snap micrometer post ends until theyve squeezed down 058 inches bracing may seem excessive gives stiff wing prefer weight drag Kevlar negligible center rib will have too little camber after wing has braced Correct gluing tensioned Kevlar bowstring under rib using almost same technique prop rib camber Motor stick tail boom made metal forms following standard soaking rolling baking procedures glue seams boron using hypodermic needle avoid curved tail booms can result glue shrinkage employ Joe Foster technique Mount large end boom form horizontally vise Slip baked boom onto form clamp down small end form about three-sixteenths inch produce bow Glue seam along top form shrinkage will straighten seam once glue has dried Rudder trailing edge rudderand-post 45/s x 27 x 381iooo leading edge 8-in length boron Pierce SHIPPING & HANDLING UPS Ground Continental US $495 UPS Air & Parcel Post $495 plus 10% Subtotal Continental US UPS Neat Day Air $1400 plus $100 per lb Shipment total 000 add $395 Foreign Orders Parcel Post Air $495 Subtotal US Mail $495 plus 10% Subtotal September 1991 159 ACPs Advanced Lightweight Materials Cleveland Giant Scalesi T SCALE BUFFS *_________ Worlds Largest Gas Ptans Assartm INTERNATIONALLY FAMOUS C-D OUALITY MASTER MODElS PLANS 5S66e,ORllC 21 $48. 8COOOICMPBYSA$6O 72 Coo 02U14 361556 104 Ceo Cal PBT5A $7462 Hoeed Ree lIe$4S 96 Wig1lNOeyReee $56 o77 oeng B17G Fe$$2 52 WWI2l Red 1 $56 105 Bee B17G Fee $6591 77WWOlel2l Red 3 $6868 Do,g 046A Obe$46~ 84 Fekke 07 Fl $49. 108 Sike S38 Aoph$62 60900049~e ReeR$42.60 Boe 100 Spell $48 70 Boyle GeeBee $56.90 Boc 100 SpoIl $62 80 S,peo~eioe S6B$38 90 SiOC4Lee Willg$62 S950pelole6ne 568 $5280 Molifl 74 T4Ml $52 63 k P68 $5679 HPg 0600 Beo6$56 94 CRek P69 Fl $68 104 HPge 0400 Bo~$65 62 lecklleed Vego $35 65 MChi,e Clippe $66 74 OeRlillle 05 1 558 .07 MChille Clippe $80 95 MeeeeoPe Spel $$4-66 Weell Whjleind $43 80 Hell Op 8,Ildeg $58 -68 Ryon Nocee $46 107 Aeo,ea CS 5p$48 69 BBellolloo V $44 61 0ogIe 038 Gb $3477 Loee0be Sedee $35 122 Oo,glo 036 Ob$5875 N AM Ich 4 $62 94 Pege Cool Roee$$O65 M Mooode B 26$62 71 Molill 810 8eb $44 81 OH MO9, le 84 $50 78 00111lC WW Ree$SS156 OH Moq, Be04$a$ oo Oohk 91 1C2 $48 98 Slee PTI 76oyde$5$. 94Co Ge1I 911C5$6000 N 811 W 961 $75 06 DePee Co,el 8o1$44 71 Oeog DC S Tee $56 oecMM,Iligefl $44 OS Deog DC S Ton $64 94 HeM Molligen$56.86 1 Teeece 13$52 6SBeeilg 926A 91154$ lO8CoOS0l/4 I6S$88 84 Boeing 9264 Fl $5860 Deoglo MS MoI$32 69 Woe C6 Cobb $44 68 BileI Beildeg Pl$44 64 BeeS C178 Slog $4459 Boell8oeMLA $48 96 Beech C17B Oleg $56. 107 FBP$58e. 53 lel 11 Elecne $3873 Toeel AbI 6000 $34 82 leek 11 919e $46 107 Mell MB1 8ee $58 62 SIlIcon 9W SB7 $45 9191 81 SIeell TIW 387 $55 108 122 SineenT WSR7$66.90W 39 8491 P11 928 $32 73W 78 BileI Fl P28 $44 ITO 116 0lIleI F 92-B 558ST F 8 74TLFeeeeSpee $5676FedTon,4AT $66 65 SkyocIe 99591 $36 114 Fe6 TIel 4AT$72* 36 C0 We1b 940 $36 84 BeI-Jeyce l9J2 $52. 78 leek LighIng F58$45 95 leening C2Anp1 $65 36 Rep SeeS, Ae$36 58Go,J2F Doek $55 epOReB Anp1 $50 78 DonJSF Ocek $68 106 Fip~ 25 Cob $5259 Gelhe Dlv Bee $32 98 leek Hoden Bnlb$48 11709110 Dlv Bon$4O-. 63 0011 969 Belleel$4O 68 BonWinkle Bid $45 9008 82 Oboe Melb$SS54 Col Soo5 09934 $55 NeSeldTbeoeelee- Ficeoobjeelleellellge acre PRICE IlelCeThe 91eeT9X elr 3ee 1200 Olbre 6 75 Fell mel SOc UP Add 10% leo11 edee Fe ehippieg & b, ele e USA CeeSMee EIeehee IC 15%I25% ei1 Fee,eleeelegB200lecIodeeFeeLel1 F,eelal eee,en elene 8100 bya~ fee gIl odd 81 00 CLEVELAND MODEL & SUPPLY Co B808B OETROIT AVE CLBYBI884a OSlO 44182 Phece Be.c lB 30Ph19 te 8858 m339 MEYS HI TECH HOBBY INC White Pond Rd Stormville NY 12582 Introduces. AcuScaleAccurately Scaled R/C Aircraft Plus Full Line Hobby Shop Supplies 1/10 Scale A6 Intruder 1/16 Scale B-17 Electric Span 636 Length 655 ht 9 11 lbs Fiberglass Fuse Cores w/Molded Fiberglass Skins Precut Farmers chable Wings Vocuf armed Canopy Much Morel Uses Dynamos Fan72 90 Size Engine Intro Price350 post /~ end boron glue place glue has dried bend boron around pierce other end holding place gluing Glue boron adjusting arm install horizontal Keviar brace before covering also make razor slot post ends before covering makes easier adjust stab later Cover rudder placing film frame wetting outline Trim microfilm hot wire acetone Stabilizer Cut spars tapered wood join two halves means scarf splice glued CyA Install three ribs Lay flat surface covering trimming Tall assembly Shim up leading edge stab its centered boom end glue place Position glue rudder boom 0003 tungsten stab bracing attached left side boom away Span 7175 Length 56 Converted Gas Fiberglass Fuse Cores w/Molded Fiberglass Skins Precut Farmers Vacaformed Cowlings Mach 4/05 Motors Intro Price425 rudder Insert boom motor stick Use jig provide /~ negative incidence glue place Wing sockets center-of-gravity remains locate drill holes wing sockets Weigh model Make dummy motor weight 125 times amount dummy weight wing Tack glue dummy motor weight onto stick midway between prop shaft hook tail hook Move wing weight around until can balance model 56% wing front post mark socket locations center-of-gravity location compensates small stab short tail boom extremely high prop pitch launch provide necessary stability holes sockets go way through stick must carefully drilled achieve -in stab tilt required VP propeller adjustment Measure torque required cruise level flight flight testing Remove prop adjust preload tension hinges just begin open low pitch torque applied prop shaft test flights find motor length size will use up almost turns descending top altitude call optimum motor old standardone-third row knots landingshould used Avoid overclimbing site Back off turns reduce launch torque work up slowly top altitude Make additional test flights using optimum motor back off less time open high-pitch screw achieve climb begins minimal altitude gain use torque value flights Youll find torque kept constant small adjustments high-pitch screw will result outstanding altitude control Low-ceiling problems Propeller adjustment low-ceiling flight remains same flying however critical climb rate must reduced factor almost four avoid ceiling makes initial climb rate close zero have found smallest difference blade pitch high launch torque will cause oscillation loss altitude Also launch speed attitude crucial very little forward thrust must provide some airspeed launch wing stab can take hold Finally must take care own body turbulence doesnt ruin launch 0-rings opinion absolutely essential allow transfer wound motor torquemeter model loss turns torque use two 0-rings full motors partial motors Partial motors Different flying sites andlor weather conditions will alter power requirements Whether fun session record trials contest task Continued page 162 Modelers ice High Quality Convenient Size fl Modest Price NO SO K 2CMeS NOTSO KWiK 25 Minute Eposy U dealer caii 513-385-7398 order direct add $200 postage NOTSO KWIK 20 Mm EPOXY lOoz $995 Gas Model Products 8773 Russet Dr Cincinnati OH 45251 160 Model Aviation Coming Soon. Electric -130 tric OV-1 DA Bronco r Etendard Duct Fan na A-37 Duct Fan Call 914 878-75239am 3pm est 914 219-32704pm 8pm est Maleslam Gdin Recognisad ____ CSA certifiedAede,e NoFile No.Ld POwer E26226LR25154PodscfsIec Only certified checks money orders accepted Minimum Order 01400 for tirree packaaesof 4 Pomerpoies 10400 per package 0200 shippine haedijngi cr residents add saics tao Prices subject change notice DEALER INQUIRIES INVITED Par further information deaier pr ces seed SASh Susiness card SERMOS R/C SNAP CONNECTORS Inc Cedar Corners Station Box 16787 Stamford CT 06905203 322-6294 Catalogs Best Scale $500 Model Aircraft Plans Handbook 1990-91 $500 Scale Drawings Plans Handbooh $500 RC Model World Plans Coos Guide $500 Catalogs $400 ea 3 ot shipped together order BOB HOLMAN Kits Call 714 885-3959 New 138 pg GERMAN PLAN BOOKS $600 Other Catalogs Please add $2 00 Shipped Separately THE BEST IN SCALE Over 25 Years ServicePlans -Eposy Scale Documentation Btitish Magazine Plans Winners Toledo- Master Internals & / MC finding new optimum motor length size faster safer partial test motors used concept simple As example quarter-size test motor requires test stick exactly three-fourths distance between hooks weighted exacfly three times lubed weight quarter-motor Since one-fourth full motor turns can put model should climb one-fourth its previous altitude fly one-fourth time good news four times test flights can made bad news errors induce through inaccurate procedure faulty estimation altitude will compounded Most modelers overrate ability estimate aircrafts altitude like run helium balloon up beams mark line exacfly 50 percent 25 percent locations helps make better height estimates Once Im fairly certain optimum length size test quarter-motor prefer verify half-motor time permits 1985 US team selection finals Akron Ohio pressed time went directly 1050 quarter-motor test flight fullmotor official flight 4317 Still three seconds away perfect correlation Finding myself same situation flying Top Cat 90 1990 Nationals went straight 1023 quarter-motor test winning flight 4129 again deviating perfect correlation just three seconds think youll agree partial-motor testing has great merit Often full-motor flights will slightly higher longer because warmer air near site ceiling Easy build adjust fly National World record-holding model has brought great pride pleasure hope will same Recommended Indoor Suppliers 0 Indoor Model Supply Box 5311 Salem OR 97304 Micro-X Products 5200 Seven Pines Drive Lorain OH 44053 FAI Model Supply FM tan rubber Box 3954 Torrance CA 90510 Erv Rodemsky microfilm 1600 Rockspring Place Walnut Creek CA 94596 Bob Oppegard rubber cutters 140 East Golden Lake Lane Circle Pines MN 55014 E FF Duration/Haught Continued page 55 operation highly recommend products Quality service support excellent SASE 1337 Pine Sap Court Orlando Florida 32825 will get latest information Despite fact conceived quickie model whipped together few weeks prior Team Finals Sheety Idea has exceeded expectations serves very aicely fly-anytime model may worth serious look needing trainer-type model quickbuilding replacement airplane High-dollar emergency Shuriken CS engines raises questions far what future holds Gas AMA event admit better product form progress arrival engines scene threatens nature event fact engines drastically change economics event could ruin AMA Gas event would afford beginner fair chance compete terms so-called expert would beginner Power fly Pee Wee 30 Possibly areas so-called beginners event hotly contested field competitors aforementioned experts After PeeWee 30 would still no transition event someone wishing make progress competition TIireb4rIJl RIC Idle-Bar Glow Plugs Long Short $209 Only Also. Traditional line non-idle bar Glow Plugs Six Types 3 Heat Ranges High Performance Glow Element Blow Proof Seal Swanson Associates PO Box 151 Wayne NJ 07470 Only $169 F VALUABLE COUPON Flying paper CORSAIR $400 2 $6 10 $12 Build Fly just 2 I-lou - All pails Pie Cut & Painted W Vi nch WngSpan El 6 inch Proplii WthMotoiPQWUI KIT g 300a planes $18 $23 Foreign Refundable what order over $25 RC paper airp1arie PAPER AIRPLANES 433 NIHOA STREET KAHULUI HI 96732 USA Send w/oder-or pijer pCane 4L 162 Model Aviation Experience Excitement Lanier RC TR-260 An ARF Aerobatic Enthusiast Fuselage Length 44 Wing Span 60 Flying Weight 6 7 lbs Area 620 sq Rec Engine Size 45 60 Radio Channels 4 60- 914 Stroke Send SASE FREE Color Catalog PO Box 458Phone 404-532-6401 Oakwood GA 30566 FAX 404-532-2163 Designed Manufactured Americal
Edition: Model Aviation - 1991/09
Page Numbers: 50, 51, 52, 158, 159, 160, 162
The author low-ceiling variant Top Cat 90 gossamerlike covering light silver gold Rodemaky microfilm LOW-CEILING version Top Cat 90 earlier Indoor model itself has set new standards consistency performance Top Cat 90L-1 became triple record holder single flight May 3 1991 established Category World Record still pending writing set new AMA FiD Stick records duration 3209 Top Cat 90 designed 1990 Indoor World Championships special challenges presented Johnson City East Tennessee State University flying site Having flown championships 1988 painfully familiar snaggy beams other hazardsropes bags ventsof ETSU site So set out design model could stay under 106-foot beams still fly longer 40 minutes incorporated features both Boron Bomber flown Nagoya 1984 original Top Cat flown Cardington 1986 did quite lot quarter-motor testing under 25-foot ceiling local Loma Linda Elementary School gymnasium before design came together its final form 50 Model Aviation Don Lindley left Bud Tenny right man processing booth ensure Top Cat 90 meets Fl D weight wingspan requirements 90 World Champs Bob Clemens photo featured adjustable VP variable pitch propeller boron prop ribs short tail boom small stabilizer asymmetrical wing rib camber Flight tests three prototypes indicated design goal would met very reliable VP propeller torque actuated has tiny 00-90 screw adjusting maximum high pitch able change pitch over rubber motors decaying torque curve slightly greater cruise thrust can maintained 1990 World Champs Top Cat 90 won Bronze Medal stole show Because its torque-actuated VP propeller model exceeded 40 minutes six official flightsa record can never broken very next day ship won National Indoor Championship month later claimed regional US team selection contest Moscow Idaho first time tried full motor testing gym Top Cat 90 set new Category AMA records FlD Stick recently selected National Free Flight Society NFFS Indoor Model Year 1991 Symposium Inspired ease other circle last touch 2359 model settled floor 3209 Since 150 turns unused average rpm flight remarkably low 357 Construction Unless youre experienced Indoor modeler youll have flying fun increase indicated wood sizes 20 30 percent Since plan gives dimensions Like its predecessor triple record-holding 1 06-gram Fl D design just keeps winningwith Category World Record still pending key its exceptional endurance outstand ing altitude control provided adjustable torque-actuated variable-pitch propeller EBob Randolph acquired two new Category records decided build low-ceiling version changes minor important 22 x 361/2 propeller replaced original 2214 x 40 motor stick shortened 1 /2 tail boom lengthened same amount also changed suspended stabilizer nonsoldered VP propeller hub details triple record-breaking May 1991 flight noteworthy another beautiful spring day Loma Linda California skies clear temperatures moderate humidity low air inside gym generally excellent although slow drift east low levels drift west top building After putting 1360 turns 12-in 070 tan rubber motor backed off 60 turns released model five feet above floor slowly lost altitude almost two minutes leveling off three feet Finally three minutes prop smoothed out ship began slowly gaining altitude Everyone breathed easier Top Cat reached beams 944 continued tap gently about September 1991 51 Bud Romak 1976 FiD World Champion helps count unused turns after half-motor test flight 1990 world contest authors view partial test motors must Top Cat 90 named Indoor Model Year 1991 NFFS Leif Englund photo Out box ready fray Team Manager Andy Tagliafico timers Walt Van Gorder Les Garber stand box decorated 84 WC Bob Clemens photo part figuring adjustments should easy way learn build light strong models building lots making little lighter may prejudiced honestly believe props will improve performance FiD ship fact may choose make just prop Ive used design try own model reason because variable-pitch props unique boron ribs require detailed explanation Ill discuss first Propeller adjustable VP hub combines Cezar Bankss idea using MonoKote hinges Larry Cailliaus concept solderless construction own idea using nylon adjusting screws Begin cutting out three 1116-OD aluminum washers side soda beer can hole must drilled undersized carefully reamed larger exactly fits 013 prop shaft wire Using hammer drift pin anvil strike shaft approximately thrust washer will go deform 015 Slide washers hook end shaft until stops deformed area Align washer shaft glue lightly Krazy Glue Make driver arm 012 wire 009 gap butt joint center Slide driver ann front end shaft align next washer again glue lightly Krazy Glue next step build up CyA cone over driver arm washer front side shaft best done shaft held vertically vise hook end up Put drop CyA waxed paper dab small amounts pin will take four five applications build cone Wait CyA set between applications use guitar strings music store 009 music wire drive pins spring idea borrowed Rick Doig Take along micrometer check size Bend spring nine coil turns other two washers youve already made glued hub make wobble-free bearings cutting off end prop shaft sure remove burr tapered prop spars must mate perfectly wooden hub hinge overlap Align hub spars flat surface lightly tack glue together using Ambroid thinned acetone Since use translucent orange MonoKote like mark prop size identifier 22 x 355-1 spar MonoKote hinge will cover protect Cut -in strips MonoKote iron place take care crush wood use wifes lightest iron set high cotton Use sharp razor trim MonoKote leading trailing edges Continued page 158 52 Model Aviation Top Cats climb angle shallow high initial torque variable-pitch prop decreases pitch torque drops off allowed ship climb slowly 16 18 mInutes level off just under 106-foot beams Johnson City ETSU site Bob Clemens photo Top Cat about launched model won Bronze Medal 90 WC six official flights exceeded 40 minutes best time 4207 Bob Clemens photo IOtIcuIarnauIv IJcrIuIIaIIc uc uu.n,.ontest rIrOl successes encouraged author design low-ceiling version aob Clemens photo BATFERY MANAGEMENT System MOSFET nicad cycler $18995 MOSPET nicad ccler designed specifically planes boats helicopters 3 overnight/trickle outputs capable charging 1 9 cells infinitely adjustable RX overnight charge current ability discharge both tiX TX packs digital discharge timer 3 outputs allow simultaneous separate charging lOt TX AUXILIARY eg glow plug starter battery nicads Nicads will charge overnight rate 17 hours 4 minutes before automatically switching trickle rate Adjustable control allows charging fiX pack up 2000 mAli capacity TX output can discharge 8 9 cell packs 300 mA fiX output can discharge 4 5 cell packs 300 500 mA True Constant Current sources used charge/discharge modes power up fiNS ONE will always come up overnight charge mode ensuring fully charged battenes event momentary 110 volt power loss Utilizing Current Detection Circuitry LEDs can illuminate current actually flowing out batteries Large digital display anti-glare filter shows RX TX discharge times Unique CAPACITY CALCULATOR will allow milliampere-hour rating batteries determined RK ELECTRONICS nNOVATIVE ELECTRONICS 3O Fox Run Hudson Ilew Iflampehire 03051 882-6022 local merchants make toy runs Getting calendar early helps ensure event can advertised along other Toys Tots events announced radio TV should help us reach beyond basic modeling audience improve public image Flying Circuits club membership has averaged between 100 120 members three years have held Toys Tots event have averaged about two toys donated per member challenge club better whether club collects toy thousand remember toy collected helping needy child community afterglow goes well beyond scorecard Want get started Get touch nearest Marine Reserves recruiting station find out get involved have near consider contacting local churches charity organizations similar mission ask can help real key get involved Prepald Orders Muney Order Certified Check Shipping & handling $500 COD Orders Cash Certified Check collected deliwry Add $350 abow amounts DEALER IfQVIWES IPIVITED Prices Specifications Subject Change Without Notice Designed manufactured USA community Dont limit yourselves Christmas gifts either Chances have local charities such childrens shelters area could use some help time year Enlist support local hobby dealer other area merchants events Short free donation can still help discounts merchandise destined charity can help other ways such distributing flyers advertising event possibly letting use photocopiers some other services help prepare flyers support docs have toys money organizations could simply use good old-fashioned manpower involvement project Get reputation helping out clubs good reputation earned demonstrated active involvement community help projects certainly wont hurt next time get pressure about flying site Dont forget get announcements local newspaper radio TV community affairs bulletins worthwhile cases toys collected distributed Marines Christmas toys some children RADIO SOUTH 5524 N Palafox Pensacola FL 32503 PRO HINGESSpecial Paper Easiest Hinge Install tic . No special hinge slotter needed r No alignment necessary inning messy epoxyInstant glues neededecal Paper RC $24SIpkg 18 e S449Ipkg 24 lot us cyanoacrylat adhesives available local hobby shop call 904-434-0909 see hobby RC modeling want funded discretionary funds need Too people communities still have needs preclude giving gifts Christmasor other time year Simply channeling some discretionary RC funds couple toys will giving needy child treasured giftD FF Top Cat/Randolph Continued page 52 hinge Dissolve tacked-on glue liberal amounts acetone allow hinges freedom movement MonoKote bond will affected Make L-pins about eighth-inch overlength Glue spars Slip shaft onto hub youll need exert preload torque driver can slipped onto pins Make fit adjust-and-screw assembly lines up driver arm has clearance both spring end prop spar end nylon adjusting screw must sanded filed flat prevent driver arm slipping off screw end high torque prop blades built flat cardboard female template boron ribs must broken off can accurately positioned prop outline extending beyond Glue ribs leading trailing edges taking care keep flat Glue balsa spacers under boron rib spar centerline glue has dried mark exact centerline felt-tipped pen Tack glue prop spar prop block 40-in pitch Top Cat 90 36-in pitch 90L-l Glue ribs tip end hub Line up several ribs marks spacers over center spar Working rib section time wet outline glue ribs spar Wet entire outline again will hold helical shape block assembly has dried remove block fasten other blade same manner prop frame complete except putting camber ribs Place prop building board rear blades facing upward its tip end closest Beginning tip glue length Kevlar leading edge positioning directly over first rib Still working over rib tension Kevlar obtain desired camber squeezing just past trailing edge Glue trailing edge make sure tension correct glue again crosses spar Trim off excess Kevlar once glue dry little practice procedure becomes quite easy Take word boron prop ribs unequaled strength lightness use Triple-R blue microfilm 158 Model Aviation CARBON FIBER LAMINATES 007 014 022 & 030 Thick WROHACELL Light Rigid Foam 1 2and 3mm GLASS CLOTH 58 ozisq yd 75 15 20 30 & 4 oz CARBON OR KEVLAR MAT 2 4 5 oz/sq yd CARBON FIBER NO FRAY TAPE CARBON FIBER RIBBON KEVLAR FABRIC TAPE KEVLAR FABRIC 17 ozIsq yd E-Z LAM Epoxy Laminating Resin Send SASE complete listing products AERO5PACE Composite Products PO Box 16621 Irvine CA 92714 714 250-1107 Source Lightweight Materials Rodemsky makes solution Bud Romak pours apply Though two members ad hoc team have won FiD World Championship title Im doing best correct deficiency achieve uniform pitch smooth running place propeller prop block during covering Theres trick making microfilm stick boron ribs Moisten brush saliva flick end across boron small droplets form -in intervals along rib length blow down gently material applied Wing Construction conventional except tips boron-stiffened wing posts Kevlar bracing use old-fashioned built-up compression ribs because can withstand high-torque strain produced variable pitch Since ribs tapered merely sliced off sanded Cut wing spars dihedral points tack glue flat Bend wing tips around 1-in-dia heated curling iron make small radius curves Mark center arc felt-tip pen moisten wood lips before bending Youll have repeat several times since wood tends spring back somewhat Cover wing flat work surface add trim Carefully brush dihedral joints acetone bend glue wing correct dihedral angles Add two boron reinforcements wing posts essential stiffen posts adequately achieve good fit tissue wing sockets repeatedly snap micrometer post ends until theyve squeezed down 058 inches bracing may seem excessive gives stiff wing prefer weight drag Kevlar negligible center rib will have too little camber after wing has braced Correct gluing tensioned Kevlar bowstring under rib using almost same technique prop rib camber Motor stick tail boom made metal forms following standard soaking rolling baking procedures glue seams boron using hypodermic needle avoid curved tail booms can result glue shrinkage employ Joe Foster technique Mount large end boom form horizontally vise Slip baked boom onto form clamp down small end form about three-sixteenths inch produce bow Glue seam along top form shrinkage will straighten seam once glue has dried Rudder trailing edge rudderand-post 45/s x 27 x 381iooo leading edge 8-in length boron Pierce SHIPPING & HANDLING UPS Ground Continental US $495 UPS Air & Parcel Post $495 plus 10% Subtotal Continental US UPS Neat Day Air $1400 plus $100 per lb Shipment total 000 add $395 Foreign Orders Parcel Post Air $495 Subtotal US Mail $495 plus 10% Subtotal September 1991 159 ACPs Advanced Lightweight Materials Cleveland Giant Scalesi T SCALE BUFFS *_________ Worlds Largest Gas Ptans Assartm INTERNATIONALLY FAMOUS C-D OUALITY MASTER MODElS PLANS 5S66e,ORllC 21 $48. 8COOOICMPBYSA$6O 72 Coo 02U14 361556 104 Ceo Cal PBT5A $7462 Hoeed Ree lIe$4S 96 Wig1lNOeyReee $56 o77 oeng B17G Fe$$2 52 WWI2l Red 1 $56 105 Bee B17G Fee $6591 77WWOlel2l Red 3 $6868 Do,g 046A Obe$46~ 84 Fekke 07 Fl $49. 108 Sike S38 Aoph$62 60900049~e ReeR$42.60 Boe 100 Spell $48 70 Boyle GeeBee $56.90 Boc 100 SpoIl $62 80 S,peo~eioe S6B$38 90 SiOC4Lee Willg$62 S950pelole6ne 568 $5280 Molifl 74 T4Ml $52 63 k P68 $5679 HPg 0600 Beo6$56 94 CRek P69 Fl $68 104 HPge 0400 Bo~$65 62 lecklleed Vego $35 65 MChi,e Clippe $66 74 OeRlillle 05 1 558 .07 MChille Clippe $80 95 MeeeeoPe Spel $$4-66 Weell Whjleind $43 80 Hell Op 8,Ildeg $58 -68 Ryon Nocee $46 107 Aeo,ea CS 5p$48 69 BBellolloo V $44 61 0ogIe 038 Gb $3477 Loee0be Sedee $35 122 Oo,glo 036 Ob$5875 N AM Ich 4 $62 94 Pege Cool Roee$$O65 M Mooode B 26$62 71 Molill 810 8eb $44 81 OH MO9, le 84 $50 78 00111lC WW Ree$SS156 OH Moq, Be04$a$ oo Oohk 91 1C2 $48 98 Slee PTI 76oyde$5$. 94Co Ge1I 911C5$6000 N 811 W 961 $75 06 DePee Co,el 8o1$44 71 Oeog DC S Tee $56 oecMM,Iligefl $44 OS Deog DC S Ton $64 94 HeM Molligen$56.86 1 Teeece 13$52 6SBeeilg 926A 91154$ lO8CoOS0l/4 I6S$88 84 Boeing 9264 Fl $5860 Deoglo MS MoI$32 69 Woe C6 Cobb $44 68 BileI Beildeg Pl$44 64 BeeS C178 Slog $4459 Boell8oeMLA $48 96 Beech C17B Oleg $56. 107 FBP$58e. 53 lel 11 Elecne $3873 Toeel AbI 6000 $34 82 leek 11 919e $46 107 Mell MB1 8ee $58 62 SIlIcon 9W SB7 $45 9191 81 SIeell TIW 387 $55 108 122 SineenT WSR7$66.90W 39 8491 P11 928 $32 73W 78 BileI Fl P28 $44 ITO 116 0lIleI F 92-B 558ST F 8 74TLFeeeeSpee $5676FedTon,4AT $66 65 SkyocIe 99591 $36 114 Fe6 TIel 4AT$72* 36 C0 We1b 940 $36 84 BeI-Jeyce l9J2 $52. 78 leek LighIng F58$45 95 leening C2Anp1 $65 36 Rep SeeS, Ae$36 58Go,J2F Doek $55 epOReB Anp1 $50 78 DonJSF Ocek $68 106 Fip~ 25 Cob $5259 Gelhe Dlv Bee $32 98 leek Hoden Bnlb$48 11709110 Dlv Bon$4O-. 63 0011 969 Belleel$4O 68 BonWinkle Bid $45 9008 82 Oboe Melb$SS54 Col Soo5 09934 $55 NeSeldTbeoeelee- Ficeoobjeelleellellge acre PRICE IlelCeThe 91eeT9X elr 3ee 1200 Olbre 6 75 Fell mel SOc UP Add 10% leo11 edee Fe ehippieg & b, ele e USA CeeSMee EIeehee IC 15%I25% ei1 Fee,eleeelegB200lecIodeeFeeLel1 F,eelal eee,en elene 8100 bya~ fee gIl odd 81 00 CLEVELAND MODEL & SUPPLY Co B808B OETROIT AVE CLBYBI884a OSlO 44182 Phece Be.c lB 30Ph19 te 8858 m339 MEYS HI TECH HOBBY INC White Pond Rd Stormville NY 12582 Introduces. AcuScaleAccurately Scaled R/C Aircraft Plus Full Line Hobby Shop Supplies 1/10 Scale A6 Intruder 1/16 Scale B-17 Electric Span 636 Length 655 ht 9 11 lbs Fiberglass Fuse Cores w/Molded Fiberglass Skins Precut Farmers chable Wings Vocuf armed Canopy Much Morel Uses Dynamos Fan72 90 Size Engine Intro Price350 post /~ end boron glue place glue has dried bend boron around pierce other end holding place gluing Glue boron adjusting arm install horizontal Keviar brace before covering also make razor slot post ends before covering makes easier adjust stab later Cover rudder placing film frame wetting outline Trim microfilm hot wire acetone Stabilizer Cut spars tapered wood join two halves means scarf splice glued CyA Install three ribs Lay flat surface covering trimming Tall assembly Shim up leading edge stab its centered boom end glue place Position glue rudder boom 0003 tungsten stab bracing attached left side boom away Span 7175 Length 56 Converted Gas Fiberglass Fuse Cores w/Molded Fiberglass Skins Precut Farmers Vacaformed Cowlings Mach 4/05 Motors Intro Price425 rudder Insert boom motor stick Use jig provide /~ negative incidence glue place Wing sockets center-of-gravity remains locate drill holes wing sockets Weigh model Make dummy motor weight 125 times amount dummy weight wing Tack glue dummy motor weight onto stick midway between prop shaft hook tail hook Move wing weight around until can balance model 56% wing front post mark socket locations center-of-gravity location compensates small stab short tail boom extremely high prop pitch launch provide necessary stability holes sockets go way through stick must carefully drilled achieve -in stab tilt required VP propeller adjustment Measure torque required cruise level flight flight testing Remove prop adjust preload tension hinges just begin open low pitch torque applied prop shaft test flights find motor length size will use up almost turns descending top altitude call optimum motor old standardone-third row knots landingshould used Avoid overclimbing site Back off turns reduce launch torque work up slowly top altitude Make additional test flights using optimum motor back off less time open high-pitch screw achieve climb begins minimal altitude gain use torque value flights Youll find torque kept constant small adjustments high-pitch screw will result outstanding altitude control Low-ceiling problems Propeller adjustment low-ceiling flight remains same flying however critical climb rate must reduced factor almost four avoid ceiling makes initial climb rate close zero have found smallest difference blade pitch high launch torque will cause oscillation loss altitude Also launch speed attitude crucial very little forward thrust must provide some airspeed launch wing stab can take hold Finally must take care own body turbulence doesnt ruin launch 0-rings opinion absolutely essential allow transfer wound motor torquemeter model loss turns torque use two 0-rings full motors partial motors Partial motors Different flying sites andlor weather conditions will alter power requirements Whether fun session record trials contest task Continued page 162 Modelers ice High Quality Convenient Size fl Modest Price NO SO K 2CMeS NOTSO KWiK 25 Minute Eposy U dealer caii 513-385-7398 order direct add $200 postage NOTSO KWIK 20 Mm EPOXY lOoz $995 Gas Model Products 8773 Russet Dr Cincinnati OH 45251 160 Model Aviation Coming Soon. Electric -130 tric OV-1 DA Bronco r Etendard Duct Fan na A-37 Duct Fan Call 914 878-75239am 3pm est 914 219-32704pm 8pm est Maleslam Gdin Recognisad ____ CSA certifiedAede,e NoFile No.Ld POwer E26226LR25154PodscfsIec Only certified checks money orders accepted Minimum Order 01400 for tirree packaaesof 4 Pomerpoies 10400 per package 0200 shippine haedijngi cr residents add saics tao Prices subject change notice DEALER INQUIRIES INVITED Par further information deaier pr ces seed SASh Susiness card SERMOS R/C SNAP CONNECTORS Inc Cedar Corners Station Box 16787 Stamford CT 06905203 322-6294 Catalogs Best Scale $500 Model Aircraft Plans Handbook 1990-91 $500 Scale Drawings Plans Handbooh $500 RC Model World Plans Coos Guide $500 Catalogs $400 ea 3 ot shipped together order BOB HOLMAN Kits Call 714 885-3959 New 138 pg GERMAN PLAN BOOKS $600 Other Catalogs Please add $2 00 Shipped Separately THE BEST IN SCALE Over 25 Years ServicePlans -Eposy Scale Documentation Btitish Magazine Plans Winners Toledo- Master Internals & / MC finding new optimum motor length size faster safer partial test motors used concept simple As example quarter-size test motor requires test stick exactly three-fourths distance between hooks weighted exacfly three times lubed weight quarter-motor Since one-fourth full motor turns can put model should climb one-fourth its previous altitude fly one-fourth time good news four times test flights can made bad news errors induce through inaccurate procedure faulty estimation altitude will compounded Most modelers overrate ability estimate aircrafts altitude like run helium balloon up beams mark line exacfly 50 percent 25 percent locations helps make better height estimates Once Im fairly certain optimum length size test quarter-motor prefer verify half-motor time permits 1985 US team selection finals Akron Ohio pressed time went directly 1050 quarter-motor test flight fullmotor official flight 4317 Still three seconds away perfect correlation Finding myself same situation flying Top Cat 90 1990 Nationals went straight 1023 quarter-motor test winning flight 4129 again deviating perfect correlation just three seconds think youll agree partial-motor testing has great merit Often full-motor flights will slightly higher longer because warmer air near site ceiling Easy build adjust fly National World record-holding model has brought great pride pleasure hope will same Recommended Indoor Suppliers 0 Indoor Model Supply Box 5311 Salem OR 97304 Micro-X Products 5200 Seven Pines Drive Lorain OH 44053 FAI Model Supply FM tan rubber Box 3954 Torrance CA 90510 Erv Rodemsky microfilm 1600 Rockspring Place Walnut Creek CA 94596 Bob Oppegard rubber cutters 140 East Golden Lake Lane Circle Pines MN 55014 E FF Duration/Haught Continued page 55 operation highly recommend products Quality service support excellent SASE 1337 Pine Sap Court Orlando Florida 32825 will get latest information Despite fact conceived quickie model whipped together few weeks prior Team Finals Sheety Idea has exceeded expectations serves very aicely fly-anytime model may worth serious look needing trainer-type model quickbuilding replacement airplane High-dollar emergency Shuriken CS engines raises questions far what future holds Gas AMA event admit better product form progress arrival engines scene threatens nature event fact engines drastically change economics event could ruin AMA Gas event would afford beginner fair chance compete terms so-called expert would beginner Power fly Pee Wee 30 Possibly areas so-called beginners event hotly contested field competitors aforementioned experts After PeeWee 30 would still no transition event someone wishing make progress competition TIireb4rIJl RIC Idle-Bar Glow Plugs Long Short $209 Only Also. Traditional line non-idle bar Glow Plugs Six Types 3 Heat Ranges High Performance Glow Element Blow Proof Seal Swanson Associates PO Box 151 Wayne NJ 07470 Only $169 F VALUABLE COUPON Flying paper CORSAIR $400 2 $6 10 $12 Build Fly just 2 I-lou - All pails Pie Cut & Painted W Vi nch WngSpan El 6 inch Proplii WthMotoiPQWUI KIT g 300a planes $18 $23 Foreign Refundable what order over $25 RC paper airp1arie PAPER AIRPLANES 433 NIHOA STREET KAHULUI HI 96732 USA Send w/oder-or pijer pCane 4L 162 Model Aviation Experience Excitement Lanier RC TR-260 An ARF Aerobatic Enthusiast Fuselage Length 44 Wing Span 60 Flying Weight 6 7 lbs Area 620 sq Rec Engine Size 45 60 Radio Channels 4 60- 914 Stroke Send SASE FREE Color Catalog PO Box 458Phone 404-532-6401 Oakwood GA 30566 FAX 404-532-2163 Designed Manufactured Americal
Edition: Model Aviation - 1991/09
Page Numbers: 50, 51, 52, 158, 159, 160, 162
The author low-ceiling variant Top Cat 90 gossamerlike covering light silver gold Rodemaky microfilm LOW-CEILING version Top Cat 90 earlier Indoor model itself has set new standards consistency performance Top Cat 90L-1 became triple record holder single flight May 3 1991 established Category World Record still pending writing set new AMA FiD Stick records duration 3209 Top Cat 90 designed 1990 Indoor World Championships special challenges presented Johnson City East Tennessee State University flying site Having flown championships 1988 painfully familiar snaggy beams other hazardsropes bags ventsof ETSU site So set out design model could stay under 106-foot beams still fly longer 40 minutes incorporated features both Boron Bomber flown Nagoya 1984 original Top Cat flown Cardington 1986 did quite lot quarter-motor testing under 25-foot ceiling local Loma Linda Elementary School gymnasium before design came together its final form 50 Model Aviation Don Lindley left Bud Tenny right man processing booth ensure Top Cat 90 meets Fl D weight wingspan requirements 90 World Champs Bob Clemens photo featured adjustable VP variable pitch propeller boron prop ribs short tail boom small stabilizer asymmetrical wing rib camber Flight tests three prototypes indicated design goal would met very reliable VP propeller torque actuated has tiny 00-90 screw adjusting maximum high pitch able change pitch over rubber motors decaying torque curve slightly greater cruise thrust can maintained 1990 World Champs Top Cat 90 won Bronze Medal stole show Because its torque-actuated VP propeller model exceeded 40 minutes six official flightsa record can never broken very next day ship won National Indoor Championship month later claimed regional US team selection contest Moscow Idaho first time tried full motor testing gym Top Cat 90 set new Category AMA records FlD Stick recently selected National Free Flight Society NFFS Indoor Model Year 1991 Symposium Inspired ease other circle last touch 2359 model settled floor 3209 Since 150 turns unused average rpm flight remarkably low 357 Construction Unless youre experienced Indoor modeler youll have flying fun increase indicated wood sizes 20 30 percent Since plan gives dimensions Like its predecessor triple record-holding 1 06-gram Fl D design just keeps winningwith Category World Record still pending key its exceptional endurance outstand ing altitude control provided adjustable torque-actuated variable-pitch propeller EBob Randolph acquired two new Category records decided build low-ceiling version changes minor important 22 x 361/2 propeller replaced original 2214 x 40 motor stick shortened 1 /2 tail boom lengthened same amount also changed suspended stabilizer nonsoldered VP propeller hub details triple record-breaking May 1991 flight noteworthy another beautiful spring day Loma Linda California skies clear temperatures moderate humidity low air inside gym generally excellent although slow drift east low levels drift west top building After putting 1360 turns 12-in 070 tan rubber motor backed off 60 turns released model five feet above floor slowly lost altitude almost two minutes leveling off three feet Finally three minutes prop smoothed out ship began slowly gaining altitude Everyone breathed easier Top Cat reached beams 944 continued tap gently about September 1991 51 Bud Romak 1976 FiD World Champion helps count unused turns after half-motor test flight 1990 world contest authors view partial test motors must Top Cat 90 named Indoor Model Year 1991 NFFS Leif Englund photo Out box ready fray Team Manager Andy Tagliafico timers Walt Van Gorder Les Garber stand box decorated 84 WC Bob Clemens photo part figuring adjustments should easy way learn build light strong models building lots making little lighter may prejudiced honestly believe props will improve performance FiD ship fact may choose make just prop Ive used design try own model reason because variable-pitch props unique boron ribs require detailed explanation Ill discuss first Propeller adjustable VP hub combines Cezar Bankss idea using MonoKote hinges Larry Cailliaus concept solderless construction own idea using nylon adjusting screws Begin cutting out three 1116-OD aluminum washers side soda beer can hole must drilled undersized carefully reamed larger exactly fits 013 prop shaft wire Using hammer drift pin anvil strike shaft approximately thrust washer will go deform 015 Slide washers hook end shaft until stops deformed area Align washer shaft glue lightly Krazy Glue Make driver arm 012 wire 009 gap butt joint center Slide driver ann front end shaft align next washer again glue lightly Krazy Glue next step build up CyA cone over driver arm washer front side shaft best done shaft held vertically vise hook end up Put drop CyA waxed paper dab small amounts pin will take four five applications build cone Wait CyA set between applications use guitar strings music store 009 music wire drive pins spring idea borrowed Rick Doig Take along micrometer check size Bend spring nine coil turns other two washers youve already made glued hub make wobble-free bearings cutting off end prop shaft sure remove burr tapered prop spars must mate perfectly wooden hub hinge overlap Align hub spars flat surface lightly tack glue together using Ambroid thinned acetone Since use translucent orange MonoKote like mark prop size identifier 22 x 355-1 spar MonoKote hinge will cover protect Cut -in strips MonoKote iron place take care crush wood use wifes lightest iron set high cotton Use sharp razor trim MonoKote leading trailing edges Continued page 158 52 Model Aviation Top Cats climb angle shallow high initial torque variable-pitch prop decreases pitch torque drops off allowed ship climb slowly 16 18 mInutes level off just under 106-foot beams Johnson City ETSU site Bob Clemens photo Top Cat about launched model won Bronze Medal 90 WC six official flights exceeded 40 minutes best time 4207 Bob Clemens photo IOtIcuIarnauIv IJcrIuIIaIIc uc uu.n,.ontest rIrOl successes encouraged author design low-ceiling version aob Clemens photo BATFERY MANAGEMENT System MOSFET nicad cycler $18995 MOSPET nicad ccler designed specifically planes boats helicopters 3 overnight/trickle outputs capable charging 1 9 cells infinitely adjustable RX overnight charge current ability discharge both tiX TX packs digital discharge timer 3 outputs allow simultaneous separate charging lOt TX AUXILIARY eg glow plug starter battery nicads Nicads will charge overnight rate 17 hours 4 minutes before automatically switching trickle rate Adjustable control allows charging fiX pack up 2000 mAli capacity TX output can discharge 8 9 cell packs 300 mA fiX output can discharge 4 5 cell packs 300 500 mA True Constant Current sources used charge/discharge modes power up fiNS ONE will always come up overnight charge mode ensuring fully charged battenes event momentary 110 volt power loss Utilizing Current Detection Circuitry LEDs can illuminate current actually flowing out batteries Large digital display anti-glare filter shows RX TX discharge times Unique CAPACITY CALCULATOR will allow milliampere-hour rating batteries determined RK ELECTRONICS nNOVATIVE ELECTRONICS 3O Fox Run Hudson Ilew Iflampehire 03051 882-6022 local merchants make toy runs Getting calendar early helps ensure event can advertised along other Toys Tots events announced radio TV should help us reach beyond basic modeling audience improve public image Flying Circuits club membership has averaged between 100 120 members three years have held Toys Tots event have averaged about two toys donated per member challenge club better whether club collects toy thousand remember toy collected helping needy child community afterglow goes well beyond scorecard Want get started Get touch nearest Marine Reserves recruiting station find out get involved have near consider contacting local churches charity organizations similar mission ask can help real key get involved Prepald Orders Muney Order Certified Check Shipping & handling $500 COD Orders Cash Certified Check collected deliwry Add $350 abow amounts DEALER IfQVIWES IPIVITED Prices Specifications Subject Change Without Notice Designed manufactured USA community Dont limit yourselves Christmas gifts either Chances have local charities such childrens shelters area could use some help time year Enlist support local hobby dealer other area merchants events Short free donation can still help discounts merchandise destined charity can help other ways such distributing flyers advertising event possibly letting use photocopiers some other services help prepare flyers support docs have toys money organizations could simply use good old-fashioned manpower involvement project Get reputation helping out clubs good reputation earned demonstrated active involvement community help projects certainly wont hurt next time get pressure about flying site Dont forget get announcements local newspaper radio TV community affairs bulletins worthwhile cases toys collected distributed Marines Christmas toys some children RADIO SOUTH 5524 N Palafox Pensacola FL 32503 PRO HINGESSpecial Paper Easiest Hinge Install tic . No special hinge slotter needed r No alignment necessary inning messy epoxyInstant glues neededecal Paper RC $24SIpkg 18 e S449Ipkg 24 lot us cyanoacrylat adhesives available local hobby shop call 904-434-0909 see hobby RC modeling want funded discretionary funds need Too people communities still have needs preclude giving gifts Christmasor other time year Simply channeling some discretionary RC funds couple toys will giving needy child treasured giftD FF Top Cat/Randolph Continued page 52 hinge Dissolve tacked-on glue liberal amounts acetone allow hinges freedom movement MonoKote bond will affected Make L-pins about eighth-inch overlength Glue spars Slip shaft onto hub youll need exert preload torque driver can slipped onto pins Make fit adjust-and-screw assembly lines up driver arm has clearance both spring end prop spar end nylon adjusting screw must sanded filed flat prevent driver arm slipping off screw end high torque prop blades built flat cardboard female template boron ribs must broken off can accurately positioned prop outline extending beyond Glue ribs leading trailing edges taking care keep flat Glue balsa spacers under boron rib spar centerline glue has dried mark exact centerline felt-tipped pen Tack glue prop spar prop block 40-in pitch Top Cat 90 36-in pitch 90L-l Glue ribs tip end hub Line up several ribs marks spacers over center spar Working rib section time wet outline glue ribs spar Wet entire outline again will hold helical shape block assembly has dried remove block fasten other blade same manner prop frame complete except putting camber ribs Place prop building board rear blades facing upward its tip end closest Beginning tip glue length Kevlar leading edge positioning directly over first rib Still working over rib tension Kevlar obtain desired camber squeezing just past trailing edge Glue trailing edge make sure tension correct glue again crosses spar Trim off excess Kevlar once glue dry little practice procedure becomes quite easy Take word boron prop ribs unequaled strength lightness use Triple-R blue microfilm 158 Model Aviation CARBON FIBER LAMINATES 007 014 022 & 030 Thick WROHACELL Light Rigid Foam 1 2and 3mm GLASS CLOTH 58 ozisq yd 75 15 20 30 & 4 oz CARBON OR KEVLAR MAT 2 4 5 oz/sq yd CARBON FIBER NO FRAY TAPE CARBON FIBER RIBBON KEVLAR FABRIC TAPE KEVLAR FABRIC 17 ozIsq yd E-Z LAM Epoxy Laminating Resin Send SASE complete listing products AERO5PACE Composite Products PO Box 16621 Irvine CA 92714 714 250-1107 Source Lightweight Materials Rodemsky makes solution Bud Romak pours apply Though two members ad hoc team have won FiD World Championship title Im doing best correct deficiency achieve uniform pitch smooth running place propeller prop block during covering Theres trick making microfilm stick boron ribs Moisten brush saliva flick end across boron small droplets form -in intervals along rib length blow down gently material applied Wing Construction conventional except tips boron-stiffened wing posts Kevlar bracing use old-fashioned built-up compression ribs because can withstand high-torque strain produced variable pitch Since ribs tapered merely sliced off sanded Cut wing spars dihedral points tack glue flat Bend wing tips around 1-in-dia heated curling iron make small radius curves Mark center arc felt-tip pen moisten wood lips before bending Youll have repeat several times since wood tends spring back somewhat Cover wing flat work surface add trim Carefully brush dihedral joints acetone bend glue wing correct dihedral angles Add two boron reinforcements wing posts essential stiffen posts adequately achieve good fit tissue wing sockets repeatedly snap micrometer post ends until theyve squeezed down 058 inches bracing may seem excessive gives stiff wing prefer weight drag Kevlar negligible center rib will have too little camber after wing has braced Correct gluing tensioned Kevlar bowstring under rib using almost same technique prop rib camber Motor stick tail boom made metal forms following standard soaking rolling baking procedures glue seams boron using hypodermic needle avoid curved tail booms can result glue shrinkage employ Joe Foster technique Mount large end boom form horizontally vise Slip baked boom onto form clamp down small end form about three-sixteenths inch produce bow Glue seam along top form shrinkage will straighten seam once glue has dried Rudder trailing edge rudderand-post 45/s x 27 x 381iooo leading edge 8-in length boron Pierce SHIPPING & HANDLING UPS Ground Continental US $495 UPS Air & Parcel Post $495 plus 10% Subtotal Continental US UPS Neat Day Air $1400 plus $100 per lb Shipment total 000 add $395 Foreign Orders Parcel Post Air $495 Subtotal US Mail $495 plus 10% Subtotal September 1991 159 ACPs Advanced Lightweight Materials Cleveland Giant Scalesi T SCALE BUFFS *_________ Worlds Largest Gas Ptans Assartm INTERNATIONALLY FAMOUS C-D OUALITY MASTER MODElS PLANS 5S66e,ORllC 21 $48. 8COOOICMPBYSA$6O 72 Coo 02U14 361556 104 Ceo Cal PBT5A $7462 Hoeed Ree lIe$4S 96 Wig1lNOeyReee $56 o77 oeng B17G Fe$$2 52 WWI2l Red 1 $56 105 Bee B17G Fee $6591 77WWOlel2l Red 3 $6868 Do,g 046A Obe$46~ 84 Fekke 07 Fl $49. 108 Sike S38 Aoph$62 60900049~e ReeR$42.60 Boe 100 Spell $48 70 Boyle GeeBee $56.90 Boc 100 SpoIl $62 80 S,peo~eioe S6B$38 90 SiOC4Lee Willg$62 S950pelole6ne 568 $5280 Molifl 74 T4Ml $52 63 k P68 $5679 HPg 0600 Beo6$56 94 CRek P69 Fl $68 104 HPge 0400 Bo~$65 62 lecklleed Vego $35 65 MChi,e Clippe $66 74 OeRlillle 05 1 558 .07 MChille Clippe $80 95 MeeeeoPe Spel $$4-66 Weell Whjleind $43 80 Hell Op 8,Ildeg $58 -68 Ryon Nocee $46 107 Aeo,ea CS 5p$48 69 BBellolloo V $44 61 0ogIe 038 Gb $3477 Loee0be Sedee $35 122 Oo,glo 036 Ob$5875 N AM Ich 4 $62 94 Pege Cool Roee$$O65 M Mooode B 26$62 71 Molill 810 8eb $44 81 OH MO9, le 84 $50 78 00111lC WW Ree$SS156 OH Moq, Be04$a$ oo Oohk 91 1C2 $48 98 Slee PTI 76oyde$5$. 94Co Ge1I 911C5$6000 N 811 W 961 $75 06 DePee Co,el 8o1$44 71 Oeog DC S Tee $56 oecMM,Iligefl $44 OS Deog DC S Ton $64 94 HeM Molligen$56.86 1 Teeece 13$52 6SBeeilg 926A 91154$ lO8CoOS0l/4 I6S$88 84 Boeing 9264 Fl $5860 Deoglo MS MoI$32 69 Woe C6 Cobb $44 68 BileI Beildeg Pl$44 64 BeeS C178 Slog $4459 Boell8oeMLA $48 96 Beech C17B Oleg $56. 107 FBP$58e. 53 lel 11 Elecne $3873 Toeel AbI 6000 $34 82 leek 11 919e $46 107 Mell MB1 8ee $58 62 SIlIcon 9W SB7 $45 9191 81 SIeell TIW 387 $55 108 122 SineenT WSR7$66.90W 39 8491 P11 928 $32 73W 78 BileI Fl P28 $44 ITO 116 0lIleI F 92-B 558ST F 8 74TLFeeeeSpee $5676FedTon,4AT $66 65 SkyocIe 99591 $36 114 Fe6 TIel 4AT$72* 36 C0 We1b 940 $36 84 BeI-Jeyce l9J2 $52. 78 leek LighIng F58$45 95 leening C2Anp1 $65 36 Rep SeeS, Ae$36 58Go,J2F Doek $55 epOReB Anp1 $50 78 DonJSF Ocek $68 106 Fip~ 25 Cob $5259 Gelhe Dlv Bee $32 98 leek Hoden Bnlb$48 11709110 Dlv Bon$4O-. 63 0011 969 Belleel$4O 68 BonWinkle Bid $45 9008 82 Oboe Melb$SS54 Col Soo5 09934 $55 NeSeldTbeoeelee- Ficeoobjeelleellellge acre PRICE IlelCeThe 91eeT9X elr 3ee 1200 Olbre 6 75 Fell mel SOc UP Add 10% leo11 edee Fe ehippieg & b, ele e USA CeeSMee EIeehee IC 15%I25% ei1 Fee,eleeelegB200lecIodeeFeeLel1 F,eelal eee,en elene 8100 bya~ fee gIl odd 81 00 CLEVELAND MODEL & SUPPLY Co B808B OETROIT AVE CLBYBI884a OSlO 44182 Phece Be.c lB 30Ph19 te 8858 m339 MEYS HI TECH HOBBY INC White Pond Rd Stormville NY 12582 Introduces. AcuScaleAccurately Scaled R/C Aircraft Plus Full Line Hobby Shop Supplies 1/10 Scale A6 Intruder 1/16 Scale B-17 Electric Span 636 Length 655 ht 9 11 lbs Fiberglass Fuse Cores w/Molded Fiberglass Skins Precut Farmers chable Wings Vocuf armed Canopy Much Morel Uses Dynamos Fan72 90 Size Engine Intro Price350 post /~ end boron glue place glue has dried bend boron around pierce other end holding place gluing Glue boron adjusting arm install horizontal Keviar brace before covering also make razor slot post ends before covering makes easier adjust stab later Cover rudder placing film frame wetting outline Trim microfilm hot wire acetone Stabilizer Cut spars tapered wood join two halves means scarf splice glued CyA Install three ribs Lay flat surface covering trimming Tall assembly Shim up leading edge stab its centered boom end glue place Position glue rudder boom 0003 tungsten stab bracing attached left side boom away Span 7175 Length 56 Converted Gas Fiberglass Fuse Cores w/Molded Fiberglass Skins Precut Farmers Vacaformed Cowlings Mach 4/05 Motors Intro Price425 rudder Insert boom motor stick Use jig provide /~ negative incidence glue place Wing sockets center-of-gravity remains locate drill holes wing sockets Weigh model Make dummy motor weight 125 times amount dummy weight wing Tack glue dummy motor weight onto stick midway between prop shaft hook tail hook Move wing weight around until can balance model 56% wing front post mark socket locations center-of-gravity location compensates small stab short tail boom extremely high prop pitch launch provide necessary stability holes sockets go way through stick must carefully drilled achieve -in stab tilt required VP propeller adjustment Measure torque required cruise level flight flight testing Remove prop adjust preload tension hinges just begin open low pitch torque applied prop shaft test flights find motor length size will use up almost turns descending top altitude call optimum motor old standardone-third row knots landingshould used Avoid overclimbing site Back off turns reduce launch torque work up slowly top altitude Make additional test flights using optimum motor back off less time open high-pitch screw achieve climb begins minimal altitude gain use torque value flights Youll find torque kept constant small adjustments high-pitch screw will result outstanding altitude control Low-ceiling problems Propeller adjustment low-ceiling flight remains same flying however critical climb rate must reduced factor almost four avoid ceiling makes initial climb rate close zero have found smallest difference blade pitch high launch torque will cause oscillation loss altitude Also launch speed attitude crucial very little forward thrust must provide some airspeed launch wing stab can take hold Finally must take care own body turbulence doesnt ruin launch 0-rings opinion absolutely essential allow transfer wound motor torquemeter model loss turns torque use two 0-rings full motors partial motors Partial motors Different flying sites andlor weather conditions will alter power requirements Whether fun session record trials contest task Continued page 162 Modelers ice High Quality Convenient Size fl Modest Price NO SO K 2CMeS NOTSO KWiK 25 Minute Eposy U dealer caii 513-385-7398 order direct add $200 postage NOTSO KWIK 20 Mm EPOXY lOoz $995 Gas Model Products 8773 Russet Dr Cincinnati OH 45251 160 Model Aviation Coming Soon. Electric -130 tric OV-1 DA Bronco r Etendard Duct Fan na A-37 Duct Fan Call 914 878-75239am 3pm est 914 219-32704pm 8pm est Maleslam Gdin Recognisad ____ CSA certifiedAede,e NoFile No.Ld POwer E26226LR25154PodscfsIec Only certified checks money orders accepted Minimum Order 01400 for tirree packaaesof 4 Pomerpoies 10400 per package 0200 shippine haedijngi cr residents add saics tao Prices subject change notice DEALER INQUIRIES INVITED Par further information deaier pr ces seed SASh Susiness card SERMOS R/C SNAP CONNECTORS Inc Cedar Corners Station Box 16787 Stamford CT 06905203 322-6294 Catalogs Best Scale $500 Model Aircraft Plans Handbook 1990-91 $500 Scale Drawings Plans Handbooh $500 RC Model World Plans Coos Guide $500 Catalogs $400 ea 3 ot shipped together order BOB HOLMAN Kits Call 714 885-3959 New 138 pg GERMAN PLAN BOOKS $600 Other Catalogs Please add $2 00 Shipped Separately THE BEST IN SCALE Over 25 Years ServicePlans -Eposy Scale Documentation Btitish Magazine Plans Winners Toledo- Master Internals & / MC finding new optimum motor length size faster safer partial test motors used concept simple As example quarter-size test motor requires test stick exactly three-fourths distance between hooks weighted exacfly three times lubed weight quarter-motor Since one-fourth full motor turns can put model should climb one-fourth its previous altitude fly one-fourth time good news four times test flights can made bad news errors induce through inaccurate procedure faulty estimation altitude will compounded Most modelers overrate ability estimate aircrafts altitude like run helium balloon up beams mark line exacfly 50 percent 25 percent locations helps make better height estimates Once Im fairly certain optimum length size test quarter-motor prefer verify half-motor time permits 1985 US team selection finals Akron Ohio pressed time went directly 1050 quarter-motor test flight fullmotor official flight 4317 Still three seconds away perfect correlation Finding myself same situation flying Top Cat 90 1990 Nationals went straight 1023 quarter-motor test winning flight 4129 again deviating perfect correlation just three seconds think youll agree partial-motor testing has great merit Often full-motor flights will slightly higher longer because warmer air near site ceiling Easy build adjust fly National World record-holding model has brought great pride pleasure hope will same Recommended Indoor Suppliers 0 Indoor Model Supply Box 5311 Salem OR 97304 Micro-X Products 5200 Seven Pines Drive Lorain OH 44053 FAI Model Supply FM tan rubber Box 3954 Torrance CA 90510 Erv Rodemsky microfilm 1600 Rockspring Place Walnut Creek CA 94596 Bob Oppegard rubber cutters 140 East Golden Lake Lane Circle Pines MN 55014 E FF Duration/Haught Continued page 55 operation highly recommend products Quality service support excellent SASE 1337 Pine Sap Court Orlando Florida 32825 will get latest information Despite fact conceived quickie model whipped together few weeks prior Team Finals Sheety Idea has exceeded expectations serves very aicely fly-anytime model may worth serious look needing trainer-type model quickbuilding replacement airplane High-dollar emergency Shuriken CS engines raises questions far what future holds Gas AMA event admit better product form progress arrival engines scene threatens nature event fact engines drastically change economics event could ruin AMA Gas event would afford beginner fair chance compete terms so-called expert would beginner Power fly Pee Wee 30 Possibly areas so-called beginners event hotly contested field competitors aforementioned experts After PeeWee 30 would still no transition event someone wishing make progress competition TIireb4rIJl RIC Idle-Bar Glow Plugs Long Short $209 Only Also. Traditional line non-idle bar Glow Plugs Six Types 3 Heat Ranges High Performance Glow Element Blow Proof Seal Swanson Associates PO Box 151 Wayne NJ 07470 Only $169 F VALUABLE COUPON Flying paper CORSAIR $400 2 $6 10 $12 Build Fly just 2 I-lou - All pails Pie Cut & Painted W Vi nch WngSpan El 6 inch Proplii WthMotoiPQWUI KIT g 300a planes $18 $23 Foreign Refundable what order over $25 RC paper airp1arie PAPER AIRPLANES 433 NIHOA STREET KAHULUI HI 96732 USA Send w/oder-or pijer pCane 4L 162 Model Aviation Experience Excitement Lanier RC TR-260 An ARF Aerobatic Enthusiast Fuselage Length 44 Wing Span 60 Flying Weight 6 7 lbs Area 620 sq Rec Engine Size 45 60 Radio Channels 4 60- 914 Stroke Send SASE FREE Color Catalog PO Box 458Phone 404-532-6401 Oakwood GA 30566 FAX 404-532-2163 Designed Manufactured Americal
Edition: Model Aviation - 1991/09
Page Numbers: 50, 51, 52, 158, 159, 160, 162
The author low-ceiling variant Top Cat 90 gossamerlike covering light silver gold Rodemaky microfilm LOW-CEILING version Top Cat 90 earlier Indoor model itself has set new standards consistency performance Top Cat 90L-1 became triple record holder single flight May 3 1991 established Category World Record still pending writing set new AMA FiD Stick records duration 3209 Top Cat 90 designed 1990 Indoor World Championships special challenges presented Johnson City East Tennessee State University flying site Having flown championships 1988 painfully familiar snaggy beams other hazardsropes bags ventsof ETSU site So set out design model could stay under 106-foot beams still fly longer 40 minutes incorporated features both Boron Bomber flown Nagoya 1984 original Top Cat flown Cardington 1986 did quite lot quarter-motor testing under 25-foot ceiling local Loma Linda Elementary School gymnasium before design came together its final form 50 Model Aviation Don Lindley left Bud Tenny right man processing booth ensure Top Cat 90 meets Fl D weight wingspan requirements 90 World Champs Bob Clemens photo featured adjustable VP variable pitch propeller boron prop ribs short tail boom small stabilizer asymmetrical wing rib camber Flight tests three prototypes indicated design goal would met very reliable VP propeller torque actuated has tiny 00-90 screw adjusting maximum high pitch able change pitch over rubber motors decaying torque curve slightly greater cruise thrust can maintained 1990 World Champs Top Cat 90 won Bronze Medal stole show Because its torque-actuated VP propeller model exceeded 40 minutes six official flightsa record can never broken very next day ship won National Indoor Championship month later claimed regional US team selection contest Moscow Idaho first time tried full motor testing gym Top Cat 90 set new Category AMA records FlD Stick recently selected National Free Flight Society NFFS Indoor Model Year 1991 Symposium Inspired ease other circle last touch 2359 model settled floor 3209 Since 150 turns unused average rpm flight remarkably low 357 Construction Unless youre experienced Indoor modeler youll have flying fun increase indicated wood sizes 20 30 percent Since plan gives dimensions Like its predecessor triple record-holding 1 06-gram Fl D design just keeps winningwith Category World Record still pending key its exceptional endurance outstand ing altitude control provided adjustable torque-actuated variable-pitch propeller EBob Randolph acquired two new Category records decided build low-ceiling version changes minor important 22 x 361/2 propeller replaced original 2214 x 40 motor stick shortened 1 /2 tail boom lengthened same amount also changed suspended stabilizer nonsoldered VP propeller hub details triple record-breaking May 1991 flight noteworthy another beautiful spring day Loma Linda California skies clear temperatures moderate humidity low air inside gym generally excellent although slow drift east low levels drift west top building After putting 1360 turns 12-in 070 tan rubber motor backed off 60 turns released model five feet above floor slowly lost altitude almost two minutes leveling off three feet Finally three minutes prop smoothed out ship began slowly gaining altitude Everyone breathed easier Top Cat reached beams 944 continued tap gently about September 1991 51 Bud Romak 1976 FiD World Champion helps count unused turns after half-motor test flight 1990 world contest authors view partial test motors must Top Cat 90 named Indoor Model Year 1991 NFFS Leif Englund photo Out box ready fray Team Manager Andy Tagliafico timers Walt Van Gorder Les Garber stand box decorated 84 WC Bob Clemens photo part figuring adjustments should easy way learn build light strong models building lots making little lighter may prejudiced honestly believe props will improve performance FiD ship fact may choose make just prop Ive used design try own model reason because variable-pitch props unique boron ribs require detailed explanation Ill discuss first Propeller adjustable VP hub combines Cezar Bankss idea using MonoKote hinges Larry Cailliaus concept solderless construction own idea using nylon adjusting screws Begin cutting out three 1116-OD aluminum washers side soda beer can hole must drilled undersized carefully reamed larger exactly fits 013 prop shaft wire Using hammer drift pin anvil strike shaft approximately thrust washer will go deform 015 Slide washers hook end shaft until stops deformed area Align washer shaft glue lightly Krazy Glue Make driver arm 012 wire 009 gap butt joint center Slide driver ann front end shaft align next washer again glue lightly Krazy Glue next step build up CyA cone over driver arm washer front side shaft best done shaft held vertically vise hook end up Put drop CyA waxed paper dab small amounts pin will take four five applications build cone Wait CyA set between applications use guitar strings music store 009 music wire drive pins spring idea borrowed Rick Doig Take along micrometer check size Bend spring nine coil turns other two washers youve already made glued hub make wobble-free bearings cutting off end prop shaft sure remove burr tapered prop spars must mate perfectly wooden hub hinge overlap Align hub spars flat surface lightly tack glue together using Ambroid thinned acetone Since use translucent orange MonoKote like mark prop size identifier 22 x 355-1 spar MonoKote hinge will cover protect Cut -in strips MonoKote iron place take care crush wood use wifes lightest iron set high cotton Use sharp razor trim MonoKote leading trailing edges Continued page 158 52 Model Aviation Top Cats climb angle shallow high initial torque variable-pitch prop decreases pitch torque drops off allowed ship climb slowly 16 18 mInutes level off just under 106-foot beams Johnson City ETSU site Bob Clemens photo Top Cat about launched model won Bronze Medal 90 WC six official flights exceeded 40 minutes best time 4207 Bob Clemens photo IOtIcuIarnauIv IJcrIuIIaIIc uc uu.n,.ontest rIrOl successes encouraged author design low-ceiling version aob Clemens photo BATFERY MANAGEMENT System MOSFET nicad cycler $18995 MOSPET nicad ccler designed specifically planes boats helicopters 3 overnight/trickle outputs capable charging 1 9 cells infinitely adjustable RX overnight charge current ability discharge both tiX TX packs digital discharge timer 3 outputs allow simultaneous separate charging lOt TX AUXILIARY eg glow plug starter battery nicads Nicads will charge overnight rate 17 hours 4 minutes before automatically switching trickle rate Adjustable control allows charging fiX pack up 2000 mAli capacity TX output can discharge 8 9 cell packs 300 mA fiX output can discharge 4 5 cell packs 300 500 mA True Constant Current sources used charge/discharge modes power up fiNS ONE will always come up overnight charge mode ensuring fully charged battenes event momentary 110 volt power loss Utilizing Current Detection Circuitry LEDs can illuminate current actually flowing out batteries Large digital display anti-glare filter shows RX TX discharge times Unique CAPACITY CALCULATOR will allow milliampere-hour rating batteries determined RK ELECTRONICS nNOVATIVE ELECTRONICS 3O Fox Run Hudson Ilew Iflampehire 03051 882-6022 local merchants make toy runs Getting calendar early helps ensure event can advertised along other Toys Tots events announced radio TV should help us reach beyond basic modeling audience improve public image Flying Circuits club membership has averaged between 100 120 members three years have held Toys Tots event have averaged about two toys donated per member challenge club better whether club collects toy thousand remember toy collected helping needy child community afterglow goes well beyond scorecard Want get started Get touch nearest Marine Reserves recruiting station find out get involved have near consider contacting local churches charity organizations similar mission ask can help real key get involved Prepald Orders Muney Order Certified Check Shipping & handling $500 COD Orders Cash Certified Check collected deliwry Add $350 abow amounts DEALER IfQVIWES IPIVITED Prices Specifications Subject Change Without Notice Designed manufactured USA community Dont limit yourselves Christmas gifts either Chances have local charities such childrens shelters area could use some help time year Enlist support local hobby dealer other area merchants events Short free donation can still help discounts merchandise destined charity can help other ways such distributing flyers advertising event possibly letting use photocopiers some other services help prepare flyers support docs have toys money organizations could simply use good old-fashioned manpower involvement project Get reputation helping out clubs good reputation earned demonstrated active involvement community help projects certainly wont hurt next time get pressure about flying site Dont forget get announcements local newspaper radio TV community affairs bulletins worthwhile cases toys collected distributed Marines Christmas toys some children RADIO SOUTH 5524 N Palafox Pensacola FL 32503 PRO HINGESSpecial Paper Easiest Hinge Install tic . No special hinge slotter needed r No alignment necessary inning messy epoxyInstant glues neededecal Paper RC $24SIpkg 18 e S449Ipkg 24 lot us cyanoacrylat adhesives available local hobby shop call 904-434-0909 see hobby RC modeling want funded discretionary funds need Too people communities still have needs preclude giving gifts Christmasor other time year Simply channeling some discretionary RC funds couple toys will giving needy child treasured giftD FF Top Cat/Randolph Continued page 52 hinge Dissolve tacked-on glue liberal amounts acetone allow hinges freedom movement MonoKote bond will affected Make L-pins about eighth-inch overlength Glue spars Slip shaft onto hub youll need exert preload torque driver can slipped onto pins Make fit adjust-and-screw assembly lines up driver arm has clearance both spring end prop spar end nylon adjusting screw must sanded filed flat prevent driver arm slipping off screw end high torque prop blades built flat cardboard female template boron ribs must broken off can accurately positioned prop outline extending beyond Glue ribs leading trailing edges taking care keep flat Glue balsa spacers under boron rib spar centerline glue has dried mark exact centerline felt-tipped pen Tack glue prop spar prop block 40-in pitch Top Cat 90 36-in pitch 90L-l Glue ribs tip end hub Line up several ribs marks spacers over center spar Working rib section time wet outline glue ribs spar Wet entire outline again will hold helical shape block assembly has dried remove block fasten other blade same manner prop frame complete except putting camber ribs Place prop building board rear blades facing upward its tip end closest Beginning tip glue length Kevlar leading edge positioning directly over first rib Still working over rib tension Kevlar obtain desired camber squeezing just past trailing edge Glue trailing edge make sure tension correct glue again crosses spar Trim off excess Kevlar once glue dry little practice procedure becomes quite easy Take word boron prop ribs unequaled strength lightness use Triple-R blue microfilm 158 Model Aviation CARBON FIBER LAMINATES 007 014 022 & 030 Thick WROHACELL Light Rigid Foam 1 2and 3mm GLASS CLOTH 58 ozisq yd 75 15 20 30 & 4 oz CARBON OR KEVLAR MAT 2 4 5 oz/sq yd CARBON FIBER NO FRAY TAPE CARBON FIBER RIBBON KEVLAR FABRIC TAPE KEVLAR FABRIC 17 ozIsq yd E-Z LAM Epoxy Laminating Resin Send SASE complete listing products AERO5PACE Composite Products PO Box 16621 Irvine CA 92714 714 250-1107 Source Lightweight Materials Rodemsky makes solution Bud Romak pours apply Though two members ad hoc team have won FiD World Championship title Im doing best correct deficiency achieve uniform pitch smooth running place propeller prop block during covering Theres trick making microfilm stick boron ribs Moisten brush saliva flick end across boron small droplets form -in intervals along rib length blow down gently material applied Wing Construction conventional except tips boron-stiffened wing posts Kevlar bracing use old-fashioned built-up compression ribs because can withstand high-torque strain produced variable pitch Since ribs tapered merely sliced off sanded Cut wing spars dihedral points tack glue flat Bend wing tips around 1-in-dia heated curling iron make small radius curves Mark center arc felt-tip pen moisten wood lips before bending Youll have repeat several times since wood tends spring back somewhat Cover wing flat work surface add trim Carefully brush dihedral joints acetone bend glue wing correct dihedral angles Add two boron reinforcements wing posts essential stiffen posts adequately achieve good fit tissue wing sockets repeatedly snap micrometer post ends until theyve squeezed down 058 inches bracing may seem excessive gives stiff wing prefer weight drag Kevlar negligible center rib will have too little camber after wing has braced Correct gluing tensioned Kevlar bowstring under rib using almost same technique prop rib camber Motor stick tail boom made metal forms following standard soaking rolling baking procedures glue seams boron using hypodermic needle avoid curved tail booms can result glue shrinkage employ Joe Foster technique Mount large end boom form horizontally vise Slip baked boom onto form clamp down small end form about three-sixteenths inch produce bow Glue seam along top form shrinkage will straighten seam once glue has dried Rudder trailing edge rudderand-post 45/s x 27 x 381iooo leading edge 8-in length boron Pierce SHIPPING & HANDLING UPS Ground Continental US $495 UPS Air & Parcel Post $495 plus 10% Subtotal Continental US UPS Neat Day Air $1400 plus $100 per lb Shipment total 000 add $395 Foreign Orders Parcel Post Air $495 Subtotal US Mail $495 plus 10% Subtotal September 1991 159 ACPs Advanced Lightweight Materials Cleveland Giant Scalesi T SCALE BUFFS *_________ Worlds Largest Gas Ptans Assartm INTERNATIONALLY FAMOUS C-D OUALITY MASTER MODElS PLANS 5S66e,ORllC 21 $48. 8COOOICMPBYSA$6O 72 Coo 02U14 361556 104 Ceo Cal PBT5A $7462 Hoeed Ree lIe$4S 96 Wig1lNOeyReee $56 o77 oeng B17G Fe$$2 52 WWI2l Red 1 $56 105 Bee B17G Fee $6591 77WWOlel2l Red 3 $6868 Do,g 046A Obe$46~ 84 Fekke 07 Fl $49. 108 Sike S38 Aoph$62 60900049~e ReeR$42.60 Boe 100 Spell $48 70 Boyle GeeBee $56.90 Boc 100 SpoIl $62 80 S,peo~eioe S6B$38 90 SiOC4Lee Willg$62 S950pelole6ne 568 $5280 Molifl 74 T4Ml $52 63 k P68 $5679 HPg 0600 Beo6$56 94 CRek P69 Fl $68 104 HPge 0400 Bo~$65 62 lecklleed Vego $35 65 MChi,e Clippe $66 74 OeRlillle 05 1 558 .07 MChille Clippe $80 95 MeeeeoPe Spel $$4-66 Weell Whjleind $43 80 Hell Op 8,Ildeg $58 -68 Ryon Nocee $46 107 Aeo,ea CS 5p$48 69 BBellolloo V $44 61 0ogIe 038 Gb $3477 Loee0be Sedee $35 122 Oo,glo 036 Ob$5875 N AM Ich 4 $62 94 Pege Cool Roee$$O65 M Mooode B 26$62 71 Molill 810 8eb $44 81 OH MO9, le 84 $50 78 00111lC WW Ree$SS156 OH Moq, Be04$a$ oo Oohk 91 1C2 $48 98 Slee PTI 76oyde$5$. 94Co Ge1I 911C5$6000 N 811 W 961 $75 06 DePee Co,el 8o1$44 71 Oeog DC S Tee $56 oecMM,Iligefl $44 OS Deog DC S Ton $64 94 HeM Molligen$56.86 1 Teeece 13$52 6SBeeilg 926A 91154$ lO8CoOS0l/4 I6S$88 84 Boeing 9264 Fl $5860 Deoglo MS MoI$32 69 Woe C6 Cobb $44 68 BileI Beildeg Pl$44 64 BeeS C178 Slog $4459 Boell8oeMLA $48 96 Beech C17B Oleg $56. 107 FBP$58e. 53 lel 11 Elecne $3873 Toeel AbI 6000 $34 82 leek 11 919e $46 107 Mell MB1 8ee $58 62 SIlIcon 9W SB7 $45 9191 81 SIeell TIW 387 $55 108 122 SineenT WSR7$66.90W 39 8491 P11 928 $32 73W 78 BileI Fl P28 $44 ITO 116 0lIleI F 92-B 558ST F 8 74TLFeeeeSpee $5676FedTon,4AT $66 65 SkyocIe 99591 $36 114 Fe6 TIel 4AT$72* 36 C0 We1b 940 $36 84 BeI-Jeyce l9J2 $52. 78 leek LighIng F58$45 95 leening C2Anp1 $65 36 Rep SeeS, Ae$36 58Go,J2F Doek $55 epOReB Anp1 $50 78 DonJSF Ocek $68 106 Fip~ 25 Cob $5259 Gelhe Dlv Bee $32 98 leek Hoden Bnlb$48 11709110 Dlv Bon$4O-. 63 0011 969 Belleel$4O 68 BonWinkle Bid $45 9008 82 Oboe Melb$SS54 Col Soo5 09934 $55 NeSeldTbeoeelee- Ficeoobjeelleellellge acre PRICE IlelCeThe 91eeT9X elr 3ee 1200 Olbre 6 75 Fell mel SOc UP Add 10% leo11 edee Fe ehippieg & b, ele e USA CeeSMee EIeehee IC 15%I25% ei1 Fee,eleeelegB200lecIodeeFeeLel1 F,eelal eee,en elene 8100 bya~ fee gIl odd 81 00 CLEVELAND MODEL & SUPPLY Co B808B OETROIT AVE CLBYBI884a OSlO 44182 Phece Be.c lB 30Ph19 te 8858 m339 MEYS HI TECH HOBBY INC White Pond Rd Stormville NY 12582 Introduces. AcuScaleAccurately Scaled R/C Aircraft Plus Full Line Hobby Shop Supplies 1/10 Scale A6 Intruder 1/16 Scale B-17 Electric Span 636 Length 655 ht 9 11 lbs Fiberglass Fuse Cores w/Molded Fiberglass Skins Precut Farmers chable Wings Vocuf armed Canopy Much Morel Uses Dynamos Fan72 90 Size Engine Intro Price350 post /~ end boron glue place glue has dried bend boron around pierce other end holding place gluing Glue boron adjusting arm install horizontal Keviar brace before covering also make razor slot post ends before covering makes easier adjust stab later Cover rudder placing film frame wetting outline Trim microfilm hot wire acetone Stabilizer Cut spars tapered wood join two halves means scarf splice glued CyA Install three ribs Lay flat surface covering trimming Tall assembly Shim up leading edge stab its centered boom end glue place Position glue rudder boom 0003 tungsten stab bracing attached left side boom away Span 7175 Length 56 Converted Gas Fiberglass Fuse Cores w/Molded Fiberglass Skins Precut Farmers Vacaformed Cowlings Mach 4/05 Motors Intro Price425 rudder Insert boom motor stick Use jig provide /~ negative incidence glue place Wing sockets center-of-gravity remains locate drill holes wing sockets Weigh model Make dummy motor weight 125 times amount dummy weight wing Tack glue dummy motor weight onto stick midway between prop shaft hook tail hook Move wing weight around until can balance model 56% wing front post mark socket locations center-of-gravity location compensates small stab short tail boom extremely high prop pitch launch provide necessary stability holes sockets go way through stick must carefully drilled achieve -in stab tilt required VP propeller adjustment Measure torque required cruise level flight flight testing Remove prop adjust preload tension hinges just begin open low pitch torque applied prop shaft test flights find motor length size will use up almost turns descending top altitude call optimum motor old standardone-third row knots landingshould used Avoid overclimbing site Back off turns reduce launch torque work up slowly top altitude Make additional test flights using optimum motor back off less time open high-pitch screw achieve climb begins minimal altitude gain use torque value flights Youll find torque kept constant small adjustments high-pitch screw will result outstanding altitude control Low-ceiling problems Propeller adjustment low-ceiling flight remains same flying however critical climb rate must reduced factor almost four avoid ceiling makes initial climb rate close zero have found smallest difference blade pitch high launch torque will cause oscillation loss altitude Also launch speed attitude crucial very little forward thrust must provide some airspeed launch wing stab can take hold Finally must take care own body turbulence doesnt ruin launch 0-rings opinion absolutely essential allow transfer wound motor torquemeter model loss turns torque use two 0-rings full motors partial motors Partial motors Different flying sites andlor weather conditions will alter power requirements Whether fun session record trials contest task Continued page 162 Modelers ice High Quality Convenient Size fl Modest Price NO SO K 2CMeS NOTSO KWiK 25 Minute Eposy U dealer caii 513-385-7398 order direct add $200 postage NOTSO KWIK 20 Mm EPOXY lOoz $995 Gas Model Products 8773 Russet Dr Cincinnati OH 45251 160 Model Aviation Coming Soon. Electric -130 tric OV-1 DA Bronco r Etendard Duct Fan na A-37 Duct Fan Call 914 878-75239am 3pm est 914 219-32704pm 8pm est Maleslam Gdin Recognisad ____ CSA certifiedAede,e NoFile No.Ld POwer E26226LR25154PodscfsIec Only certified checks money orders accepted Minimum Order 01400 for tirree packaaesof 4 Pomerpoies 10400 per package 0200 shippine haedijngi cr residents add saics tao Prices subject change notice DEALER INQUIRIES INVITED Par further information deaier pr ces seed SASh Susiness card SERMOS R/C SNAP CONNECTORS Inc Cedar Corners Station Box 16787 Stamford CT 06905203 322-6294 Catalogs Best Scale $500 Model Aircraft Plans Handbook 1990-91 $500 Scale Drawings Plans Handbooh $500 RC Model World Plans Coos Guide $500 Catalogs $400 ea 3 ot shipped together order BOB HOLMAN Kits Call 714 885-3959 New 138 pg GERMAN PLAN BOOKS $600 Other Catalogs Please add $2 00 Shipped Separately THE BEST IN SCALE Over 25 Years ServicePlans -Eposy Scale Documentation Btitish Magazine Plans Winners Toledo- Master Internals & / MC finding new optimum motor length size faster safer partial test motors used concept simple As example quarter-size test motor requires test stick exactly three-fourths distance between hooks weighted exacfly three times lubed weight quarter-motor Since one-fourth full motor turns can put model should climb one-fourth its previous altitude fly one-fourth time good news four times test flights can made bad news errors induce through inaccurate procedure faulty estimation altitude will compounded Most modelers overrate ability estimate aircrafts altitude like run helium balloon up beams mark line exacfly 50 percent 25 percent locations helps make better height estimates Once Im fairly certain optimum length size test quarter-motor prefer verify half-motor time permits 1985 US team selection finals Akron Ohio pressed time went directly 1050 quarter-motor test flight fullmotor official flight 4317 Still three seconds away perfect correlation Finding myself same situation flying Top Cat 90 1990 Nationals went straight 1023 quarter-motor test winning flight 4129 again deviating perfect correlation just three seconds think youll agree partial-motor testing has great merit Often full-motor flights will slightly higher longer because warmer air near site ceiling Easy build adjust fly National World record-holding model has brought great pride pleasure hope will same Recommended Indoor Suppliers 0 Indoor Model Supply Box 5311 Salem OR 97304 Micro-X Products 5200 Seven Pines Drive Lorain OH 44053 FAI Model Supply FM tan rubber Box 3954 Torrance CA 90510 Erv Rodemsky microfilm 1600 Rockspring Place Walnut Creek CA 94596 Bob Oppegard rubber cutters 140 East Golden Lake Lane Circle Pines MN 55014 E FF Duration/Haught Continued page 55 operation highly recommend products Quality service support excellent SASE 1337 Pine Sap Court Orlando Florida 32825 will get latest information Despite fact conceived quickie model whipped together few weeks prior Team Finals Sheety Idea has exceeded expectations serves very aicely fly-anytime model may worth serious look needing trainer-type model quickbuilding replacement airplane High-dollar emergency Shuriken CS engines raises questions far what future holds Gas AMA event admit better product form progress arrival engines scene threatens nature event fact engines drastically change economics event could ruin AMA Gas event would afford beginner fair chance compete terms so-called expert would beginner Power fly Pee Wee 30 Possibly areas so-called beginners event hotly contested field competitors aforementioned experts After PeeWee 30 would still no transition event someone wishing make progress competition TIireb4rIJl RIC Idle-Bar Glow Plugs Long Short $209 Only Also. Traditional line non-idle bar Glow Plugs Six Types 3 Heat Ranges High Performance Glow Element Blow Proof Seal Swanson Associates PO Box 151 Wayne NJ 07470 Only $169 F VALUABLE COUPON Flying paper CORSAIR $400 2 $6 10 $12 Build Fly just 2 I-lou - All pails Pie Cut & Painted W Vi nch WngSpan El 6 inch Proplii WthMotoiPQWUI KIT g 300a planes $18 $23 Foreign Refundable what order over $25 RC paper airp1arie PAPER AIRPLANES 433 NIHOA STREET KAHULUI HI 96732 USA Send w/oder-or pijer pCane 4L 162 Model Aviation Experience Excitement Lanier RC TR-260 An ARF Aerobatic Enthusiast Fuselage Length 44 Wing Span 60 Flying Weight 6 7 lbs Area 620 sq Rec Engine Size 45 60 Radio Channels 4 60- 914 Stroke Send SASE FREE Color Catalog PO Box 458Phone 404-532-6401 Oakwood GA 30566 FAX 404-532-2163 Designed Manufactured Americal
Edition: Model Aviation - 1991/09
Page Numbers: 50, 51, 52, 158, 159, 160, 162
The author low-ceiling variant Top Cat 90 gossamerlike covering light silver gold Rodemaky microfilm LOW-CEILING version Top Cat 90 earlier Indoor model itself has set new standards consistency performance Top Cat 90L-1 became triple record holder single flight May 3 1991 established Category World Record still pending writing set new AMA FiD Stick records duration 3209 Top Cat 90 designed 1990 Indoor World Championships special challenges presented Johnson City East Tennessee State University flying site Having flown championships 1988 painfully familiar snaggy beams other hazardsropes bags ventsof ETSU site So set out design model could stay under 106-foot beams still fly longer 40 minutes incorporated features both Boron Bomber flown Nagoya 1984 original Top Cat flown Cardington 1986 did quite lot quarter-motor testing under 25-foot ceiling local Loma Linda Elementary School gymnasium before design came together its final form 50 Model Aviation Don Lindley left Bud Tenny right man processing booth ensure Top Cat 90 meets Fl D weight wingspan requirements 90 World Champs Bob Clemens photo featured adjustable VP variable pitch propeller boron prop ribs short tail boom small stabilizer asymmetrical wing rib camber Flight tests three prototypes indicated design goal would met very reliable VP propeller torque actuated has tiny 00-90 screw adjusting maximum high pitch able change pitch over rubber motors decaying torque curve slightly greater cruise thrust can maintained 1990 World Champs Top Cat 90 won Bronze Medal stole show Because its torque-actuated VP propeller model exceeded 40 minutes six official flightsa record can never broken very next day ship won National Indoor Championship month later claimed regional US team selection contest Moscow Idaho first time tried full motor testing gym Top Cat 90 set new Category AMA records FlD Stick recently selected National Free Flight Society NFFS Indoor Model Year 1991 Symposium Inspired ease other circle last touch 2359 model settled floor 3209 Since 150 turns unused average rpm flight remarkably low 357 Construction Unless youre experienced Indoor modeler youll have flying fun increase indicated wood sizes 20 30 percent Since plan gives dimensions Like its predecessor triple record-holding 1 06-gram Fl D design just keeps winningwith Category World Record still pending key its exceptional endurance outstand ing altitude control provided adjustable torque-actuated variable-pitch propeller EBob Randolph acquired two new Category records decided build low-ceiling version changes minor important 22 x 361/2 propeller replaced original 2214 x 40 motor stick shortened 1 /2 tail boom lengthened same amount also changed suspended stabilizer nonsoldered VP propeller hub details triple record-breaking May 1991 flight noteworthy another beautiful spring day Loma Linda California skies clear temperatures moderate humidity low air inside gym generally excellent although slow drift east low levels drift west top building After putting 1360 turns 12-in 070 tan rubber motor backed off 60 turns released model five feet above floor slowly lost altitude almost two minutes leveling off three feet Finally three minutes prop smoothed out ship began slowly gaining altitude Everyone breathed easier Top Cat reached beams 944 continued tap gently about September 1991 51 Bud Romak 1976 FiD World Champion helps count unused turns after half-motor test flight 1990 world contest authors view partial test motors must Top Cat 90 named Indoor Model Year 1991 NFFS Leif Englund photo Out box ready fray Team Manager Andy Tagliafico timers Walt Van Gorder Les Garber stand box decorated 84 WC Bob Clemens photo part figuring adjustments should easy way learn build light strong models building lots making little lighter may prejudiced honestly believe props will improve performance FiD ship fact may choose make just prop Ive used design try own model reason because variable-pitch props unique boron ribs require detailed explanation Ill discuss first Propeller adjustable VP hub combines Cezar Bankss idea using MonoKote hinges Larry Cailliaus concept solderless construction own idea using nylon adjusting screws Begin cutting out three 1116-OD aluminum washers side soda beer can hole must drilled undersized carefully reamed larger exactly fits 013 prop shaft wire Using hammer drift pin anvil strike shaft approximately thrust washer will go deform 015 Slide washers hook end shaft until stops deformed area Align washer shaft glue lightly Krazy Glue Make driver arm 012 wire 009 gap butt joint center Slide driver ann front end shaft align next washer again glue lightly Krazy Glue next step build up CyA cone over driver arm washer front side shaft best done shaft held vertically vise hook end up Put drop CyA waxed paper dab small amounts pin will take four five applications build cone Wait CyA set between applications use guitar strings music store 009 music wire drive pins spring idea borrowed Rick Doig Take along micrometer check size Bend spring nine coil turns other two washers youve already made glued hub make wobble-free bearings cutting off end prop shaft sure remove burr tapered prop spars must mate perfectly wooden hub hinge overlap Align hub spars flat surface lightly tack glue together using Ambroid thinned acetone Since use translucent orange MonoKote like mark prop size identifier 22 x 355-1 spar MonoKote hinge will cover protect Cut -in strips MonoKote iron place take care crush wood use wifes lightest iron set high cotton Use sharp razor trim MonoKote leading trailing edges Continued page 158 52 Model Aviation Top Cats climb angle shallow high initial torque variable-pitch prop decreases pitch torque drops off allowed ship climb slowly 16 18 mInutes level off just under 106-foot beams Johnson City ETSU site Bob Clemens photo Top Cat about launched model won Bronze Medal 90 WC six official flights exceeded 40 minutes best time 4207 Bob Clemens photo IOtIcuIarnauIv IJcrIuIIaIIc uc uu.n,.ontest rIrOl successes encouraged author design low-ceiling version aob Clemens photo BATFERY MANAGEMENT System MOSFET nicad cycler $18995 MOSPET nicad ccler designed specifically planes boats helicopters 3 overnight/trickle outputs capable charging 1 9 cells infinitely adjustable RX overnight charge current ability discharge both tiX TX packs digital discharge timer 3 outputs allow simultaneous separate charging lOt TX AUXILIARY eg glow plug starter battery nicads Nicads will charge overnight rate 17 hours 4 minutes before automatically switching trickle rate Adjustable control allows charging fiX pack up 2000 mAli capacity TX output can discharge 8 9 cell packs 300 mA fiX output can discharge 4 5 cell packs 300 500 mA True Constant Current sources used charge/discharge modes power up fiNS ONE will always come up overnight charge mode ensuring fully charged battenes event momentary 110 volt power loss Utilizing Current Detection Circuitry LEDs can illuminate current actually flowing out batteries Large digital display anti-glare filter shows RX TX discharge times Unique CAPACITY CALCULATOR will allow milliampere-hour rating batteries determined RK ELECTRONICS nNOVATIVE ELECTRONICS 3O Fox Run Hudson Ilew Iflampehire 03051 882-6022 local merchants make toy runs Getting calendar early helps ensure event can advertised along other Toys Tots events announced radio TV should help us reach beyond basic modeling audience improve public image Flying Circuits club membership has averaged between 100 120 members three years have held Toys Tots event have averaged about two toys donated per member challenge club better whether club collects toy thousand remember toy collected helping needy child community afterglow goes well beyond scorecard Want get started Get touch nearest Marine Reserves recruiting station find out get involved have near consider contacting local churches charity organizations similar mission ask can help real key get involved Prepald Orders Muney Order Certified Check Shipping & handling $500 COD Orders Cash Certified Check collected deliwry Add $350 abow amounts DEALER IfQVIWES IPIVITED Prices Specifications Subject Change Without Notice Designed manufactured USA community Dont limit yourselves Christmas gifts either Chances have local charities such childrens shelters area could use some help time year Enlist support local hobby dealer other area merchants events Short free donation can still help discounts merchandise destined charity can help other ways such distributing flyers advertising event possibly letting use photocopiers some other services help prepare flyers support docs have toys money organizations could simply use good old-fashioned manpower involvement project Get reputation helping out clubs good reputation earned demonstrated active involvement community help projects certainly wont hurt next time get pressure about flying site Dont forget get announcements local newspaper radio TV community affairs bulletins worthwhile cases toys collected distributed Marines Christmas toys some children RADIO SOUTH 5524 N Palafox Pensacola FL 32503 PRO HINGESSpecial Paper Easiest Hinge Install tic . No special hinge slotter needed r No alignment necessary inning messy epoxyInstant glues neededecal Paper RC $24SIpkg 18 e S449Ipkg 24 lot us cyanoacrylat adhesives available local hobby shop call 904-434-0909 see hobby RC modeling want funded discretionary funds need Too people communities still have needs preclude giving gifts Christmasor other time year Simply channeling some discretionary RC funds couple toys will giving needy child treasured giftD FF Top Cat/Randolph Continued page 52 hinge Dissolve tacked-on glue liberal amounts acetone allow hinges freedom movement MonoKote bond will affected Make L-pins about eighth-inch overlength Glue spars Slip shaft onto hub youll need exert preload torque driver can slipped onto pins Make fit adjust-and-screw assembly lines up driver arm has clearance both spring end prop spar end nylon adjusting screw must sanded filed flat prevent driver arm slipping off screw end high torque prop blades built flat cardboard female template boron ribs must broken off can accurately positioned prop outline extending beyond Glue ribs leading trailing edges taking care keep flat Glue balsa spacers under boron rib spar centerline glue has dried mark exact centerline felt-tipped pen Tack glue prop spar prop block 40-in pitch Top Cat 90 36-in pitch 90L-l Glue ribs tip end hub Line up several ribs marks spacers over center spar Working rib section time wet outline glue ribs spar Wet entire outline again will hold helical shape block assembly has dried remove block fasten other blade same manner prop frame complete except putting camber ribs Place prop building board rear blades facing upward its tip end closest Beginning tip glue length Kevlar leading edge positioning directly over first rib Still working over rib tension Kevlar obtain desired camber squeezing just past trailing edge Glue trailing edge make sure tension correct glue again crosses spar Trim off excess Kevlar once glue dry little practice procedure becomes quite easy Take word boron prop ribs unequaled strength lightness use Triple-R blue microfilm 158 Model Aviation CARBON FIBER LAMINATES 007 014 022 & 030 Thick WROHACELL Light Rigid Foam 1 2and 3mm GLASS CLOTH 58 ozisq yd 75 15 20 30 & 4 oz CARBON OR KEVLAR MAT 2 4 5 oz/sq yd CARBON FIBER NO FRAY TAPE CARBON FIBER RIBBON KEVLAR FABRIC TAPE KEVLAR FABRIC 17 ozIsq yd E-Z LAM Epoxy Laminating Resin Send SASE complete listing products AERO5PACE Composite Products PO Box 16621 Irvine CA 92714 714 250-1107 Source Lightweight Materials Rodemsky makes solution Bud Romak pours apply Though two members ad hoc team have won FiD World Championship title Im doing best correct deficiency achieve uniform pitch smooth running place propeller prop block during covering Theres trick making microfilm stick boron ribs Moisten brush saliva flick end across boron small droplets form -in intervals along rib length blow down gently material applied Wing Construction conventional except tips boron-stiffened wing posts Kevlar bracing use old-fashioned built-up compression ribs because can withstand high-torque strain produced variable pitch Since ribs tapered merely sliced off sanded Cut wing spars dihedral points tack glue flat Bend wing tips around 1-in-dia heated curling iron make small radius curves Mark center arc felt-tip pen moisten wood lips before bending Youll have repeat several times since wood tends spring back somewhat Cover wing flat work surface add trim Carefully brush dihedral joints acetone bend glue wing correct dihedral angles Add two boron reinforcements wing posts essential stiffen posts adequately achieve good fit tissue wing sockets repeatedly snap micrometer post ends until theyve squeezed down 058 inches bracing may seem excessive gives stiff wing prefer weight drag Kevlar negligible center rib will have too little camber after wing has braced Correct gluing tensioned Kevlar bowstring under rib using almost same technique prop rib camber Motor stick tail boom made metal forms following standard soaking rolling baking procedures glue seams boron using hypodermic needle avoid curved tail booms can result glue shrinkage employ Joe Foster technique Mount large end boom form horizontally vise Slip baked boom onto form clamp down small end form about three-sixteenths inch produce bow Glue seam along top form shrinkage will straighten seam once glue has dried Rudder trailing edge rudderand-post 45/s x 27 x 381iooo leading edge 8-in length boron Pierce SHIPPING & HANDLING UPS Ground Continental US $495 UPS Air & Parcel Post $495 plus 10% Subtotal Continental US UPS Neat Day Air $1400 plus $100 per lb Shipment total 000 add $395 Foreign Orders Parcel Post Air $495 Subtotal US Mail $495 plus 10% Subtotal September 1991 159 ACPs Advanced Lightweight Materials Cleveland Giant Scalesi T SCALE BUFFS *_________ Worlds Largest Gas Ptans Assartm INTERNATIONALLY FAMOUS C-D OUALITY MASTER MODElS PLANS 5S66e,ORllC 21 $48. 8COOOICMPBYSA$6O 72 Coo 02U14 361556 104 Ceo Cal PBT5A $7462 Hoeed Ree lIe$4S 96 Wig1lNOeyReee $56 o77 oeng B17G Fe$$2 52 WWI2l Red 1 $56 105 Bee B17G Fee $6591 77WWOlel2l Red 3 $6868 Do,g 046A Obe$46~ 84 Fekke 07 Fl $49. 108 Sike S38 Aoph$62 60900049~e ReeR$42.60 Boe 100 Spell $48 70 Boyle GeeBee $56.90 Boc 100 SpoIl $62 80 S,peo~eioe S6B$38 90 SiOC4Lee Willg$62 S950pelole6ne 568 $5280 Molifl 74 T4Ml $52 63 k P68 $5679 HPg 0600 Beo6$56 94 CRek P69 Fl $68 104 HPge 0400 Bo~$65 62 lecklleed Vego $35 65 MChi,e Clippe $66 74 OeRlillle 05 1 558 .07 MChille Clippe $80 95 MeeeeoPe Spel $$4-66 Weell Whjleind $43 80 Hell Op 8,Ildeg $58 -68 Ryon Nocee $46 107 Aeo,ea CS 5p$48 69 BBellolloo V $44 61 0ogIe 038 Gb $3477 Loee0be Sedee $35 122 Oo,glo 036 Ob$5875 N AM Ich 4 $62 94 Pege Cool Roee$$O65 M Mooode B 26$62 71 Molill 810 8eb $44 81 OH MO9, le 84 $50 78 00111lC WW Ree$SS156 OH Moq, Be04$a$ oo Oohk 91 1C2 $48 98 Slee PTI 76oyde$5$. 94Co Ge1I 911C5$6000 N 811 W 961 $75 06 DePee Co,el 8o1$44 71 Oeog DC S Tee $56 oecMM,Iligefl $44 OS Deog DC S Ton $64 94 HeM Molligen$56.86 1 Teeece 13$52 6SBeeilg 926A 91154$ lO8CoOS0l/4 I6S$88 84 Boeing 9264 Fl $5860 Deoglo MS MoI$32 69 Woe C6 Cobb $44 68 BileI Beildeg Pl$44 64 BeeS C178 Slog $4459 Boell8oeMLA $48 96 Beech C17B Oleg $56. 107 FBP$58e. 53 lel 11 Elecne $3873 Toeel AbI 6000 $34 82 leek 11 919e $46 107 Mell MB1 8ee $58 62 SIlIcon 9W SB7 $45 9191 81 SIeell TIW 387 $55 108 122 SineenT WSR7$66.90W 39 8491 P11 928 $32 73W 78 BileI Fl P28 $44 ITO 116 0lIleI F 92-B 558ST F 8 74TLFeeeeSpee $5676FedTon,4AT $66 65 SkyocIe 99591 $36 114 Fe6 TIel 4AT$72* 36 C0 We1b 940 $36 84 BeI-Jeyce l9J2 $52. 78 leek LighIng F58$45 95 leening C2Anp1 $65 36 Rep SeeS, Ae$36 58Go,J2F Doek $55 epOReB Anp1 $50 78 DonJSF Ocek $68 106 Fip~ 25 Cob $5259 Gelhe Dlv Bee $32 98 leek Hoden Bnlb$48 11709110 Dlv Bon$4O-. 63 0011 969 Belleel$4O 68 BonWinkle Bid $45 9008 82 Oboe Melb$SS54 Col Soo5 09934 $55 NeSeldTbeoeelee- Ficeoobjeelleellellge acre PRICE IlelCeThe 91eeT9X elr 3ee 1200 Olbre 6 75 Fell mel SOc UP Add 10% leo11 edee Fe ehippieg & b, ele e USA CeeSMee EIeehee IC 15%I25% ei1 Fee,eleeelegB200lecIodeeFeeLel1 F,eelal eee,en elene 8100 bya~ fee gIl odd 81 00 CLEVELAND MODEL & SUPPLY Co B808B OETROIT AVE CLBYBI884a OSlO 44182 Phece Be.c lB 30Ph19 te 8858 m339 MEYS HI TECH HOBBY INC White Pond Rd Stormville NY 12582 Introduces. AcuScaleAccurately Scaled R/C Aircraft Plus Full Line Hobby Shop Supplies 1/10 Scale A6 Intruder 1/16 Scale B-17 Electric Span 636 Length 655 ht 9 11 lbs Fiberglass Fuse Cores w/Molded Fiberglass Skins Precut Farmers chable Wings Vocuf armed Canopy Much Morel Uses Dynamos Fan72 90 Size Engine Intro Price350 post /~ end boron glue place glue has dried bend boron around pierce other end holding place gluing Glue boron adjusting arm install horizontal Keviar brace before covering also make razor slot post ends before covering makes easier adjust stab later Cover rudder placing film frame wetting outline Trim microfilm hot wire acetone Stabilizer Cut spars tapered wood join two halves means scarf splice glued CyA Install three ribs Lay flat surface covering trimming Tall assembly Shim up leading edge stab its centered boom end glue place Position glue rudder boom 0003 tungsten stab bracing attached left side boom away Span 7175 Length 56 Converted Gas Fiberglass Fuse Cores w/Molded Fiberglass Skins Precut Farmers Vacaformed Cowlings Mach 4/05 Motors Intro Price425 rudder Insert boom motor stick Use jig provide /~ negative incidence glue place Wing sockets center-of-gravity remains locate drill holes wing sockets Weigh model Make dummy motor weight 125 times amount dummy weight wing Tack glue dummy motor weight onto stick midway between prop shaft hook tail hook Move wing weight around until can balance model 56% wing front post mark socket locations center-of-gravity location compensates small stab short tail boom extremely high prop pitch launch provide necessary stability holes sockets go way through stick must carefully drilled achieve -in stab tilt required VP propeller adjustment Measure torque required cruise level flight flight testing Remove prop adjust preload tension hinges just begin open low pitch torque applied prop shaft test flights find motor length size will use up almost turns descending top altitude call optimum motor old standardone-third row knots landingshould used Avoid overclimbing site Back off turns reduce launch torque work up slowly top altitude Make additional test flights using optimum motor back off less time open high-pitch screw achieve climb begins minimal altitude gain use torque value flights Youll find torque kept constant small adjustments high-pitch screw will result outstanding altitude control Low-ceiling problems Propeller adjustment low-ceiling flight remains same flying however critical climb rate must reduced factor almost four avoid ceiling makes initial climb rate close zero have found smallest difference blade pitch high launch torque will cause oscillation loss altitude Also launch speed attitude crucial very little forward thrust must provide some airspeed launch wing stab can take hold Finally must take care own body turbulence doesnt ruin launch 0-rings opinion absolutely essential allow transfer wound motor torquemeter model loss turns torque use two 0-rings full motors partial motors Partial motors Different flying sites andlor weather conditions will alter power requirements Whether fun session record trials contest task Continued page 162 Modelers ice High Quality Convenient Size fl Modest Price NO SO K 2CMeS NOTSO KWiK 25 Minute Eposy U dealer caii 513-385-7398 order direct add $200 postage NOTSO KWIK 20 Mm EPOXY lOoz $995 Gas Model Products 8773 Russet Dr Cincinnati OH 45251 160 Model Aviation Coming Soon. Electric -130 tric OV-1 DA Bronco r Etendard Duct Fan na A-37 Duct Fan Call 914 878-75239am 3pm est 914 219-32704pm 8pm est Maleslam Gdin Recognisad ____ CSA certifiedAede,e NoFile No.Ld POwer E26226LR25154PodscfsIec Only certified checks money orders accepted Minimum Order 01400 for tirree packaaesof 4 Pomerpoies 10400 per package 0200 shippine haedijngi cr residents add saics tao Prices subject change notice DEALER INQUIRIES INVITED Par further information deaier pr ces seed SASh Susiness card SERMOS R/C SNAP CONNECTORS Inc Cedar Corners Station Box 16787 Stamford CT 06905203 322-6294 Catalogs Best Scale $500 Model Aircraft Plans Handbook 1990-91 $500 Scale Drawings Plans Handbooh $500 RC Model World Plans Coos Guide $500 Catalogs $400 ea 3 ot shipped together order BOB HOLMAN Kits Call 714 885-3959 New 138 pg GERMAN PLAN BOOKS $600 Other Catalogs Please add $2 00 Shipped Separately THE BEST IN SCALE Over 25 Years ServicePlans -Eposy Scale Documentation Btitish Magazine Plans Winners Toledo- Master Internals & / MC finding new optimum motor length size faster safer partial test motors used concept simple As example quarter-size test motor requires test stick exactly three-fourths distance between hooks weighted exacfly three times lubed weight quarter-motor Since one-fourth full motor turns can put model should climb one-fourth its previous altitude fly one-fourth time good news four times test flights can made bad news errors induce through inaccurate procedure faulty estimation altitude will compounded Most modelers overrate ability estimate aircrafts altitude like run helium balloon up beams mark line exacfly 50 percent 25 percent locations helps make better height estimates Once Im fairly certain optimum length size test quarter-motor prefer verify half-motor time permits 1985 US team selection finals Akron Ohio pressed time went directly 1050 quarter-motor test flight fullmotor official flight 4317 Still three seconds away perfect correlation Finding myself same situation flying Top Cat 90 1990 Nationals went straight 1023 quarter-motor test winning flight 4129 again deviating perfect correlation just three seconds think youll agree partial-motor testing has great merit Often full-motor flights will slightly higher longer because warmer air near site ceiling Easy build adjust fly National World record-holding model has brought great pride pleasure hope will same Recommended Indoor Suppliers 0 Indoor Model Supply Box 5311 Salem OR 97304 Micro-X Products 5200 Seven Pines Drive Lorain OH 44053 FAI Model Supply FM tan rubber Box 3954 Torrance CA 90510 Erv Rodemsky microfilm 1600 Rockspring Place Walnut Creek CA 94596 Bob Oppegard rubber cutters 140 East Golden Lake Lane Circle Pines MN 55014 E FF Duration/Haught Continued page 55 operation highly recommend products Quality service support excellent SASE 1337 Pine Sap Court Orlando Florida 32825 will get latest information Despite fact conceived quickie model whipped together few weeks prior Team Finals Sheety Idea has exceeded expectations serves very aicely fly-anytime model may worth serious look needing trainer-type model quickbuilding replacement airplane High-dollar emergency Shuriken CS engines raises questions far what future holds Gas AMA event admit better product form progress arrival engines scene threatens nature event fact engines drastically change economics event could ruin AMA Gas event would afford beginner fair chance compete terms so-called expert would beginner Power fly Pee Wee 30 Possibly areas so-called beginners event hotly contested field competitors aforementioned experts After PeeWee 30 would still no transition event someone wishing make progress competition TIireb4rIJl RIC Idle-Bar Glow Plugs Long Short $209 Only Also. Traditional line non-idle bar Glow Plugs Six Types 3 Heat Ranges High Performance Glow Element Blow Proof Seal Swanson Associates PO Box 151 Wayne NJ 07470 Only $169 F VALUABLE COUPON Flying paper CORSAIR $400 2 $6 10 $12 Build Fly just 2 I-lou - All pails Pie Cut & Painted W Vi nch WngSpan El 6 inch Proplii WthMotoiPQWUI KIT g 300a planes $18 $23 Foreign Refundable what order over $25 RC paper airp1arie PAPER AIRPLANES 433 NIHOA STREET KAHULUI HI 96732 USA Send w/oder-or pijer pCane 4L 162 Model Aviation Experience Excitement Lanier RC TR-260 An ARF Aerobatic Enthusiast Fuselage Length 44 Wing Span 60 Flying Weight 6 7 lbs Area 620 sq Rec Engine Size 45 60 Radio Channels 4 60- 914 Stroke Send SASE FREE Color Catalog PO Box 458Phone 404-532-6401 Oakwood GA 30566 FAX 404-532-2163 Designed Manufactured Americal
Edition: Model Aviation - 1991/09
Page Numbers: 50, 51, 52, 158, 159, 160, 162
The author low-ceiling variant Top Cat 90 gossamerlike covering light silver gold Rodemaky microfilm LOW-CEILING version Top Cat 90 earlier Indoor model itself has set new standards consistency performance Top Cat 90L-1 became triple record holder single flight May 3 1991 established Category World Record still pending writing set new AMA FiD Stick records duration 3209 Top Cat 90 designed 1990 Indoor World Championships special challenges presented Johnson City East Tennessee State University flying site Having flown championships 1988 painfully familiar snaggy beams other hazardsropes bags ventsof ETSU site So set out design model could stay under 106-foot beams still fly longer 40 minutes incorporated features both Boron Bomber flown Nagoya 1984 original Top Cat flown Cardington 1986 did quite lot quarter-motor testing under 25-foot ceiling local Loma Linda Elementary School gymnasium before design came together its final form 50 Model Aviation Don Lindley left Bud Tenny right man processing booth ensure Top Cat 90 meets Fl D weight wingspan requirements 90 World Champs Bob Clemens photo featured adjustable VP variable pitch propeller boron prop ribs short tail boom small stabilizer asymmetrical wing rib camber Flight tests three prototypes indicated design goal would met very reliable VP propeller torque actuated has tiny 00-90 screw adjusting maximum high pitch able change pitch over rubber motors decaying torque curve slightly greater cruise thrust can maintained 1990 World Champs Top Cat 90 won Bronze Medal stole show Because its torque-actuated VP propeller model exceeded 40 minutes six official flightsa record can never broken very next day ship won National Indoor Championship month later claimed regional US team selection contest Moscow Idaho first time tried full motor testing gym Top Cat 90 set new Category AMA records FlD Stick recently selected National Free Flight Society NFFS Indoor Model Year 1991 Symposium Inspired ease other circle last touch 2359 model settled floor 3209 Since 150 turns unused average rpm flight remarkably low 357 Construction Unless youre experienced Indoor modeler youll have flying fun increase indicated wood sizes 20 30 percent Since plan gives dimensions Like its predecessor triple record-holding 1 06-gram Fl D design just keeps winningwith Category World Record still pending key its exceptional endurance outstand ing altitude control provided adjustable torque-actuated variable-pitch propeller EBob Randolph acquired two new Category records decided build low-ceiling version changes minor important 22 x 361/2 propeller replaced original 2214 x 40 motor stick shortened 1 /2 tail boom lengthened same amount also changed suspended stabilizer nonsoldered VP propeller hub details triple record-breaking May 1991 flight noteworthy another beautiful spring day Loma Linda California skies clear temperatures moderate humidity low air inside gym generally excellent although slow drift east low levels drift west top building After putting 1360 turns 12-in 070 tan rubber motor backed off 60 turns released model five feet above floor slowly lost altitude almost two minutes leveling off three feet Finally three minutes prop smoothed out ship began slowly gaining altitude Everyone breathed easier Top Cat reached beams 944 continued tap gently about September 1991 51 Bud Romak 1976 FiD World Champion helps count unused turns after half-motor test flight 1990 world contest authors view partial test motors must Top Cat 90 named Indoor Model Year 1991 NFFS Leif Englund photo Out box ready fray Team Manager Andy Tagliafico timers Walt Van Gorder Les Garber stand box decorated 84 WC Bob Clemens photo part figuring adjustments should easy way learn build light strong models building lots making little lighter may prejudiced honestly believe props will improve performance FiD ship fact may choose make just prop Ive used design try own model reason because variable-pitch props unique boron ribs require detailed explanation Ill discuss first Propeller adjustable VP hub combines Cezar Bankss idea using MonoKote hinges Larry Cailliaus concept solderless construction own idea using nylon adjusting screws Begin cutting out three 1116-OD aluminum washers side soda beer can hole must drilled undersized carefully reamed larger exactly fits 013 prop shaft wire Using hammer drift pin anvil strike shaft approximately thrust washer will go deform 015 Slide washers hook end shaft until stops deformed area Align washer shaft glue lightly Krazy Glue Make driver arm 012 wire 009 gap butt joint center Slide driver ann front end shaft align next washer again glue lightly Krazy Glue next step build up CyA cone over driver arm washer front side shaft best done shaft held vertically vise hook end up Put drop CyA waxed paper dab small amounts pin will take four five applications build cone Wait CyA set between applications use guitar strings music store 009 music wire drive pins spring idea borrowed Rick Doig Take along micrometer check size Bend spring nine coil turns other two washers youve already made glued hub make wobble-free bearings cutting off end prop shaft sure remove burr tapered prop spars must mate perfectly wooden hub hinge overlap Align hub spars flat surface lightly tack glue together using Ambroid thinned acetone Since use translucent orange MonoKote like mark prop size identifier 22 x 355-1 spar MonoKote hinge will cover protect Cut -in strips MonoKote iron place take care crush wood use wifes lightest iron set high cotton Use sharp razor trim MonoKote leading trailing edges Continued page 158 52 Model Aviation Top Cats climb angle shallow high initial torque variable-pitch prop decreases pitch torque drops off allowed ship climb slowly 16 18 mInutes level off just under 106-foot beams Johnson City ETSU site Bob Clemens photo Top Cat about launched model won Bronze Medal 90 WC six official flights exceeded 40 minutes best time 4207 Bob Clemens photo IOtIcuIarnauIv IJcrIuIIaIIc uc uu.n,.ontest rIrOl successes encouraged author design low-ceiling version aob Clemens photo BATFERY MANAGEMENT System MOSFET nicad cycler $18995 MOSPET nicad ccler designed specifically planes boats helicopters 3 overnight/trickle outputs capable charging 1 9 cells infinitely adjustable RX overnight charge current ability discharge both tiX TX packs digital discharge timer 3 outputs allow simultaneous separate charging lOt TX AUXILIARY eg glow plug starter battery nicads Nicads will charge overnight rate 17 hours 4 minutes before automatically switching trickle rate Adjustable control allows charging fiX pack up 2000 mAli capacity TX output can discharge 8 9 cell packs 300 mA fiX output can discharge 4 5 cell packs 300 500 mA True Constant Current sources used charge/discharge modes power up fiNS ONE will always come up overnight charge mode ensuring fully charged battenes event momentary 110 volt power loss Utilizing Current Detection Circuitry LEDs can illuminate current actually flowing out batteries Large digital display anti-glare filter shows RX TX discharge times Unique CAPACITY CALCULATOR will allow milliampere-hour rating batteries determined RK ELECTRONICS nNOVATIVE ELECTRONICS 3O Fox Run Hudson Ilew Iflampehire 03051 882-6022 local merchants make toy runs Getting calendar early helps ensure event can advertised along other Toys Tots events announced radio TV should help us reach beyond basic modeling audience improve public image Flying Circuits club membership has averaged between 100 120 members three years have held Toys Tots event have averaged about two toys donated per member challenge club better whether club collects toy thousand remember toy collected helping needy child community afterglow goes well beyond scorecard Want get started Get touch nearest Marine Reserves recruiting station find out get involved have near consider contacting local churches charity organizations similar mission ask can help real key get involved Prepald Orders Muney Order Certified Check Shipping & handling $500 COD Orders Cash Certified Check collected deliwry Add $350 abow amounts DEALER IfQVIWES IPIVITED Prices Specifications Subject Change Without Notice Designed manufactured USA community Dont limit yourselves Christmas gifts either Chances have local charities such childrens shelters area could use some help time year Enlist support local hobby dealer other area merchants events Short free donation can still help discounts merchandise destined charity can help other ways such distributing flyers advertising event possibly letting use photocopiers some other services help prepare flyers support docs have toys money organizations could simply use good old-fashioned manpower involvement project Get reputation helping out clubs good reputation earned demonstrated active involvement community help projects certainly wont hurt next time get pressure about flying site Dont forget get announcements local newspaper radio TV community affairs bulletins worthwhile cases toys collected distributed Marines Christmas toys some children RADIO SOUTH 5524 N Palafox Pensacola FL 32503 PRO HINGESSpecial Paper Easiest Hinge Install tic . No special hinge slotter needed r No alignment necessary inning messy epoxyInstant glues neededecal Paper RC $24SIpkg 18 e S449Ipkg 24 lot us cyanoacrylat adhesives available local hobby shop call 904-434-0909 see hobby RC modeling want funded discretionary funds need Too people communities still have needs preclude giving gifts Christmasor other time year Simply channeling some discretionary RC funds couple toys will giving needy child treasured giftD FF Top Cat/Randolph Continued page 52 hinge Dissolve tacked-on glue liberal amounts acetone allow hinges freedom movement MonoKote bond will affected Make L-pins about eighth-inch overlength Glue spars Slip shaft onto hub youll need exert preload torque driver can slipped onto pins Make fit adjust-and-screw assembly lines up driver arm has clearance both spring end prop spar end nylon adjusting screw must sanded filed flat prevent driver arm slipping off screw end high torque prop blades built flat cardboard female template boron ribs must broken off can accurately positioned prop outline extending beyond Glue ribs leading trailing edges taking care keep flat Glue balsa spacers under boron rib spar centerline glue has dried mark exact centerline felt-tipped pen Tack glue prop spar prop block 40-in pitch Top Cat 90 36-in pitch 90L-l Glue ribs tip end hub Line up several ribs marks spacers over center spar Working rib section time wet outline glue ribs spar Wet entire outline again will hold helical shape block assembly has dried remove block fasten other blade same manner prop frame complete except putting camber ribs Place prop building board rear blades facing upward its tip end closest Beginning tip glue length Kevlar leading edge positioning directly over first rib Still working over rib tension Kevlar obtain desired camber squeezing just past trailing edge Glue trailing edge make sure tension correct glue again crosses spar Trim off excess Kevlar once glue dry little practice procedure becomes quite easy Take word boron prop ribs unequaled strength lightness use Triple-R blue microfilm 158 Model Aviation CARBON FIBER LAMINATES 007 014 022 & 030 Thick WROHACELL Light Rigid Foam 1 2and 3mm GLASS CLOTH 58 ozisq yd 75 15 20 30 & 4 oz CARBON OR KEVLAR MAT 2 4 5 oz/sq yd CARBON FIBER NO FRAY TAPE CARBON FIBER RIBBON KEVLAR FABRIC TAPE KEVLAR FABRIC 17 ozIsq yd E-Z LAM Epoxy Laminating Resin Send SASE complete listing products AERO5PACE Composite Products PO Box 16621 Irvine CA 92714 714 250-1107 Source Lightweight Materials Rodemsky makes solution Bud Romak pours apply Though two members ad hoc team have won FiD World Championship title Im doing best correct deficiency achieve uniform pitch smooth running place propeller prop block during covering Theres trick making microfilm stick boron ribs Moisten brush saliva flick end across boron small droplets form -in intervals along rib length blow down gently material applied Wing Construction conventional except tips boron-stiffened wing posts Kevlar bracing use old-fashioned built-up compression ribs because can withstand high-torque strain produced variable pitch Since ribs tapered merely sliced off sanded Cut wing spars dihedral points tack glue flat Bend wing tips around 1-in-dia heated curling iron make small radius curves Mark center arc felt-tip pen moisten wood lips before bending Youll have repeat several times since wood tends spring back somewhat Cover wing flat work surface add trim Carefully brush dihedral joints acetone bend glue wing correct dihedral angles Add two boron reinforcements wing posts essential stiffen posts adequately achieve good fit tissue wing sockets repeatedly snap micrometer post ends until theyve squeezed down 058 inches bracing may seem excessive gives stiff wing prefer weight drag Kevlar negligible center rib will have too little camber after wing has braced Correct gluing tensioned Kevlar bowstring under rib using almost same technique prop rib camber Motor stick tail boom made metal forms following standard soaking rolling baking procedures glue seams boron using hypodermic needle avoid curved tail booms can result glue shrinkage employ Joe Foster technique Mount large end boom form horizontally vise Slip baked boom onto form clamp down small end form about three-sixteenths inch produce bow Glue seam along top form shrinkage will straighten seam once glue has dried Rudder trailing edge rudderand-post 45/s x 27 x 381iooo leading edge 8-in length boron Pierce SHIPPING & HANDLING UPS Ground Continental US $495 UPS Air & Parcel Post $495 plus 10% Subtotal Continental US UPS Neat Day Air $1400 plus $100 per lb Shipment total 000 add $395 Foreign Orders Parcel Post Air $495 Subtotal US Mail $495 plus 10% Subtotal September 1991 159 ACPs Advanced Lightweight Materials Cleveland Giant Scalesi T SCALE BUFFS *_________ Worlds Largest Gas Ptans Assartm INTERNATIONALLY FAMOUS C-D OUALITY MASTER MODElS PLANS 5S66e,ORllC 21 $48. 8COOOICMPBYSA$6O 72 Coo 02U14 361556 104 Ceo Cal PBT5A $7462 Hoeed Ree lIe$4S 96 Wig1lNOeyReee $56 o77 oeng B17G Fe$$2 52 WWI2l Red 1 $56 105 Bee B17G Fee $6591 77WWOlel2l Red 3 $6868 Do,g 046A Obe$46~ 84 Fekke 07 Fl $49. 108 Sike S38 Aoph$62 60900049~e ReeR$42.60 Boe 100 Spell $48 70 Boyle GeeBee $56.90 Boc 100 SpoIl $62 80 S,peo~eioe S6B$38 90 SiOC4Lee Willg$62 S950pelole6ne 568 $5280 Molifl 74 T4Ml $52 63 k P68 $5679 HPg 0600 Beo6$56 94 CRek P69 Fl $68 104 HPge 0400 Bo~$65 62 lecklleed Vego $35 65 MChi,e Clippe $66 74 OeRlillle 05 1 558 .07 MChille Clippe $80 95 MeeeeoPe Spel $$4-66 Weell Whjleind $43 80 Hell Op 8,Ildeg $58 -68 Ryon Nocee $46 107 Aeo,ea CS 5p$48 69 BBellolloo V $44 61 0ogIe 038 Gb $3477 Loee0be Sedee $35 122 Oo,glo 036 Ob$5875 N AM Ich 4 $62 94 Pege Cool Roee$$O65 M Mooode B 26$62 71 Molill 810 8eb $44 81 OH MO9, le 84 $50 78 00111lC WW Ree$SS156 OH Moq, Be04$a$ oo Oohk 91 1C2 $48 98 Slee PTI 76oyde$5$. 94Co Ge1I 911C5$6000 N 811 W 961 $75 06 DePee Co,el 8o1$44 71 Oeog DC S Tee $56 oecMM,Iligefl $44 OS Deog DC S Ton $64 94 HeM Molligen$56.86 1 Teeece 13$52 6SBeeilg 926A 91154$ lO8CoOS0l/4 I6S$88 84 Boeing 9264 Fl $5860 Deoglo MS MoI$32 69 Woe C6 Cobb $44 68 BileI Beildeg Pl$44 64 BeeS C178 Slog $4459 Boell8oeMLA $48 96 Beech C17B Oleg $56. 107 FBP$58e. 53 lel 11 Elecne $3873 Toeel AbI 6000 $34 82 leek 11 919e $46 107 Mell MB1 8ee $58 62 SIlIcon 9W SB7 $45 9191 81 SIeell TIW 387 $55 108 122 SineenT WSR7$66.90W 39 8491 P11 928 $32 73W 78 BileI Fl P28 $44 ITO 116 0lIleI F 92-B 558ST F 8 74TLFeeeeSpee $5676FedTon,4AT $66 65 SkyocIe 99591 $36 114 Fe6 TIel 4AT$72* 36 C0 We1b 940 $36 84 BeI-Jeyce l9J2 $52. 78 leek LighIng F58$45 95 leening C2Anp1 $65 36 Rep SeeS, Ae$36 58Go,J2F Doek $55 epOReB Anp1 $50 78 DonJSF Ocek $68 106 Fip~ 25 Cob $5259 Gelhe Dlv Bee $32 98 leek Hoden Bnlb$48 11709110 Dlv Bon$4O-. 63 0011 969 Belleel$4O 68 BonWinkle Bid $45 9008 82 Oboe Melb$SS54 Col Soo5 09934 $55 NeSeldTbeoeelee- Ficeoobjeelleellellge acre PRICE IlelCeThe 91eeT9X elr 3ee 1200 Olbre 6 75 Fell mel SOc UP Add 10% leo11 edee Fe ehippieg & b, ele e USA CeeSMee EIeehee IC 15%I25% ei1 Fee,eleeelegB200lecIodeeFeeLel1 F,eelal eee,en elene 8100 bya~ fee gIl odd 81 00 CLEVELAND MODEL & SUPPLY Co B808B OETROIT AVE CLBYBI884a OSlO 44182 Phece Be.c lB 30Ph19 te 8858 m339 MEYS HI TECH HOBBY INC White Pond Rd Stormville NY 12582 Introduces. AcuScaleAccurately Scaled R/C Aircraft Plus Full Line Hobby Shop Supplies 1/10 Scale A6 Intruder 1/16 Scale B-17 Electric Span 636 Length 655 ht 9 11 lbs Fiberglass Fuse Cores w/Molded Fiberglass Skins Precut Farmers chable Wings Vocuf armed Canopy Much Morel Uses Dynamos Fan72 90 Size Engine Intro Price350 post /~ end boron glue place glue has dried bend boron around pierce other end holding place gluing Glue boron adjusting arm install horizontal Keviar brace before covering also make razor slot post ends before covering makes easier adjust stab later Cover rudder placing film frame wetting outline Trim microfilm hot wire acetone Stabilizer Cut spars tapered wood join two halves means scarf splice glued CyA Install three ribs Lay flat surface covering trimming Tall assembly Shim up leading edge stab its centered boom end glue place Position glue rudder boom 0003 tungsten stab bracing attached left side boom away Span 7175 Length 56 Converted Gas Fiberglass Fuse Cores w/Molded Fiberglass Skins Precut Farmers Vacaformed Cowlings Mach 4/05 Motors Intro Price425 rudder Insert boom motor stick Use jig provide /~ negative incidence glue place Wing sockets center-of-gravity remains locate drill holes wing sockets Weigh model Make dummy motor weight 125 times amount dummy weight wing Tack glue dummy motor weight onto stick midway between prop shaft hook tail hook Move wing weight around until can balance model 56% wing front post mark socket locations center-of-gravity location compensates small stab short tail boom extremely high prop pitch launch provide necessary stability holes sockets go way through stick must carefully drilled achieve -in stab tilt required VP propeller adjustment Measure torque required cruise level flight flight testing Remove prop adjust preload tension hinges just begin open low pitch torque applied prop shaft test flights find motor length size will use up almost turns descending top altitude call optimum motor old standardone-third row knots landingshould used Avoid overclimbing site Back off turns reduce launch torque work up slowly top altitude Make additional test flights using optimum motor back off less time open high-pitch screw achieve climb begins minimal altitude gain use torque value flights Youll find torque kept constant small adjustments high-pitch screw will result outstanding altitude control Low-ceiling problems Propeller adjustment low-ceiling flight remains same flying however critical climb rate must reduced factor almost four avoid ceiling makes initial climb rate close zero have found smallest difference blade pitch high launch torque will cause oscillation loss altitude Also launch speed attitude crucial very little forward thrust must provide some airspeed launch wing stab can take hold Finally must take care own body turbulence doesnt ruin launch 0-rings opinion absolutely essential allow transfer wound motor torquemeter model loss turns torque use two 0-rings full motors partial motors Partial motors Different flying sites andlor weather conditions will alter power requirements Whether fun session record trials contest task Continued page 162 Modelers ice High Quality Convenient Size fl Modest Price NO SO K 2CMeS NOTSO KWiK 25 Minute Eposy U dealer caii 513-385-7398 order direct add $200 postage NOTSO KWIK 20 Mm EPOXY lOoz $995 Gas Model Products 8773 Russet Dr Cincinnati OH 45251 160 Model Aviation Coming Soon. Electric -130 tric OV-1 DA Bronco r Etendard Duct Fan na A-37 Duct Fan Call 914 878-75239am 3pm est 914 219-32704pm 8pm est Maleslam Gdin Recognisad ____ CSA certifiedAede,e NoFile No.Ld POwer E26226LR25154PodscfsIec Only certified checks money orders accepted Minimum Order 01400 for tirree packaaesof 4 Pomerpoies 10400 per package 0200 shippine haedijngi cr residents add saics tao Prices subject change notice DEALER INQUIRIES INVITED Par further information deaier pr ces seed SASh Susiness card SERMOS R/C SNAP CONNECTORS Inc Cedar Corners Station Box 16787 Stamford CT 06905203 322-6294 Catalogs Best Scale $500 Model Aircraft Plans Handbook 1990-91 $500 Scale Drawings Plans Handbooh $500 RC Model World Plans Coos Guide $500 Catalogs $400 ea 3 ot shipped together order BOB HOLMAN Kits Call 714 885-3959 New 138 pg GERMAN PLAN BOOKS $600 Other Catalogs Please add $2 00 Shipped Separately THE BEST IN SCALE Over 25 Years ServicePlans -Eposy Scale Documentation Btitish Magazine Plans Winners Toledo- Master Internals & / MC finding new optimum motor length size faster safer partial test motors used concept simple As example quarter-size test motor requires test stick exactly three-fourths distance between hooks weighted exacfly three times lubed weight quarter-motor Since one-fourth full motor turns can put model should climb one-fourth its previous altitude fly one-fourth time good news four times test flights can made bad news errors induce through inaccurate procedure faulty estimation altitude will compounded Most modelers overrate ability estimate aircrafts altitude like run helium balloon up beams mark line exacfly 50 percent 25 percent locations helps make better height estimates Once Im fairly certain optimum length size test quarter-motor prefer verify half-motor time permits 1985 US team selection finals Akron Ohio pressed time went directly 1050 quarter-motor test flight fullmotor official flight 4317 Still three seconds away perfect correlation Finding myself same situation flying Top Cat 90 1990 Nationals went straight 1023 quarter-motor test winning flight 4129 again deviating perfect correlation just three seconds think youll agree partial-motor testing has great merit Often full-motor flights will slightly higher longer because warmer air near site ceiling Easy build adjust fly National World record-holding model has brought great pride pleasure hope will same Recommended Indoor Suppliers 0 Indoor Model Supply Box 5311 Salem OR 97304 Micro-X Products 5200 Seven Pines Drive Lorain OH 44053 FAI Model Supply FM tan rubber Box 3954 Torrance CA 90510 Erv Rodemsky microfilm 1600 Rockspring Place Walnut Creek CA 94596 Bob Oppegard rubber cutters 140 East Golden Lake Lane Circle Pines MN 55014 E FF Duration/Haught Continued page 55 operation highly recommend products Quality service support excellent SASE 1337 Pine Sap Court Orlando Florida 32825 will get latest information Despite fact conceived quickie model whipped together few weeks prior Team Finals Sheety Idea has exceeded expectations serves very aicely fly-anytime model may worth serious look needing trainer-type model quickbuilding replacement airplane High-dollar emergency Shuriken CS engines raises questions far what future holds Gas AMA event admit better product form progress arrival engines scene threatens nature event fact engines drastically change economics event could ruin AMA Gas event would afford beginner fair chance compete terms so-called expert would beginner Power fly Pee Wee 30 Possibly areas so-called beginners event hotly contested field competitors aforementioned experts After PeeWee 30 would still no transition event someone wishing make progress competition TIireb4rIJl RIC Idle-Bar Glow Plugs Long Short $209 Only Also. 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