i PRESENTED HERE computer program BASIC languageeasy use home computersto help design canard aircraft program simple will provide useful tool design work will also fun exercise youre learning use computer same time hobby use computers growing rapidly cost home com puters seems coming down just rapidly Judging local RC club mod elers getting computers theyre readily available now extent programs like can practical use ful Weve seen club newsletters heard discussions modelers already using computers hobby prob ably predominantely RC Soaringfor air foil analysis performance prediction wind tunnel data interpretation etc expect see computer programs presented model magazines future early stage starting off exciting direction use computers various programs can help advancement I{ C4t tt 1 44 C RC aeromodeling got involved effort during design Firebolt canard RC model fea tured issue mystery design ing canard determining location balance point size vertical fin area modelers design trial error procedure basing new design known successful past aircraft chang ing some dimensions see what happens can done successfully canard few existing aircraft use reference OOOOOOOOOOOOOOooooooooooooooOOOOOOOoOOooooooooooooooooc In* * 1 I-L** 1002 10** ItInII01* * rz- ** 0InIn0** 0002 1514 * * KIn 024W** 01 ILl 02** .In1-InIn10** 013 1302II* 01540100- * * tWIn- 02** 002In0It11** 3In IS * * 0000000 01 0- 0 5002 10 4 I-021-10In CIn 02 02In4 0DIn 115 InI-ItInO01 021 In00150-SI In020010 1 020 1-0 4WIn002 11 401002-Ol 34InIn0It21 ow In02 InIn4 0-InInC 02 0200-21 In00 210 15151'02ItIn 1110 01-cIInO0 0 1JInInIn0 0112-0-02ItIn10 02 r 0 InI 0201-1- 4In 00 021In021013 1InS I-In0 InOIn 150 0 InIn1In In 0 15120002 LOInII 0 0 15 ItIt.021In0 02 0In In 0- 15 03 0 020 InTh02100210- 4 0Z 1302 K15000In'1- 0001 010 1 0It 15 02 InIn3In 024In C 0It 0 415112InIn 0-15 0215 C In02 1- C 4 .2In1-InIn02In 1 C3 In15 02 002WInLI' 2102 1 02 0 1 0In 020313 15 002 0-In 2- 02020- I0200l 0202 InIn 015100- 0 -0*- 12 15 01-1 1 wa01Z ItOIn 102 InOIn 0 o 0 02 0 In.InInIn 02020 1 10-10 1502 nIt*In02W10It115 *-In 40 1 a01315010-15-J 11J 13 1310 1-o10- 1302 02112002 I- 1 1In InIn 21 -In02- COZInO 02-In- 0010151015 0 It02It0In0-02300 ,151-F-02In3154102002In0 02 1 1 -41 1 1515In02150215 1- F- 15 15 15 15 02115151515151515 2115151151It13It13It21It21It21It210 02 010 11111110- It02It02It0ItCOIt0 0- 114 InCInInIn In1111l 15 -InInInInInInInItItItTh 0-0-1010100- 0 02 InIn00-0-0-0-0-0-0-0 InInIn0SInS00InInInInInInIn00 15 InInInInIn0InInInIn.0111In1flOI-0201In-10111In11210110[v32][b24173012111425600]] .1J020211110120 11110C111140111111411JIJ0 11IFI\02 0 000000000 000 0000 00000000000000000000000000000c 40 Model Aviation K- 0 0 0 0 0 D D D Assist RC Canard Aircraft Design Home computers becoming more widespread perhaps time article computer can used modeling pur poses computer program printed using Ron Van Puttes formulas useful designing canards conventional air craft too U Dick Sarpolus Bernie Raad Aerodynamic formulas available sist us dont have aerodynamic engineers use Ron Van Putte writes MAs Sport Aerobatics column provides few additional answers balance point must move forward stab included several basic formulas necessary use area decreased balance point will canard design June 1980 column big advantage having computer move rear other variations can formulas provide center mass calculations ease performing considered working up new design balance point location canard number design variations variations can run through caldesign also indicate vertical fin work finalize new airplane culations until settle final airarea design sufficient course example looking canard design frame configuration desired computer program necessary wing swept-back further balance point recommend look Van use formulas program must move back As horizontal stabilizer Puttes June 1980 column complete makes easier faster get answers moved forward away wing explanation formulas along 00000000000000000000000000000000000000000000000000000 CFhi - C UAC LA CA U Fr Cd FCF-C0. FrCAFr 0I 000 CCC U ICEFr2 FrF- Fr IF0 F-F- Fr2 ILASCUW 4U CCZFCUFrO ZUC Fr0.rFrFr FrFLUCLLJ0I40LU 0OFLOF-00 CA I0LU 00W00 AAF- IF UOFFF F--FCLCAlFFrU FFOFrOCILFrO0 00- -FFF0JF0CFrFUFrOFF0 UFL U FrC C 0 0 FrFr FF CA FtCCF FCC0AJFr4UhF-C CF0 F- 0CF0FFFF0FAF Fr010 F-C-U 0NOFF L Fr CJ CCC F - IF FF CLA F\F CFFFr00 U 0 0 0U C Fr Fr-0Cli FFrFF000F-F IF 1-C FrI r-F- 1-FFr 0U 0 0 F-\N C- 0 IC.C1EUW EU U U 0F- COCCI-CCI CCI CCI CCIF FF0 FOILF 0 OF-LCE 11-lU LOll Fr CU C-C-XE CC Fr 0 CFACOFF ULL0.CU F-0N 0**CSO * CA NC 0 0FLFFOFFrF- UFr F FrOFrOC04F -Fr ACOF- OUFAW WA FrCAl C FLU U Fr F-F-COCOOCI CO CF 000 CI 0*Fr IF- F0000F- F uZCC UFrFI~ OCLUS FrS Ot- 0 0 F-UC F-NNCO* F- .A CA Cl0FF-FA0U EUE 0U UW Fr F- U 0 CO 0 CC-CO.CO COCOCO CAN U CA CA CA F 0F-U 0 F 0 F- 0FJFrFE Fr FrU IL0UUWZUFr Fr NF4F- 00 WF-FU0 0UFrFr U U 0. 4 Fr* * -CU*U W COCAAC 00 OOFA F FrC0FrFr 01 EU UFrF-0FrF-F- O EF- F- Fr 0101010 COFO0I0. U F C-FflE C- COW F N CICO F F-FrEE Fr F F-O-WW F-U C F-I0E'UCFr0 CE Fr F-Fr FL FL Fr Fr F- CC F- LA 00 FF-N NF-0 F-N00F-0J FrN 1 -C-ECO- 00 Fr F O-U OF OFrF-I4 CC- F C-COF-FLFL0IF-WFLCO F-U NON UCO 1 lUCO-CFFr ..C.FrO +-N* *-N CO*FC** *GF-LAIIJOJ S0NI-ACA FrFr ZFI-CCA4 1FF-C C C C NC C -C -C C C C 0S0S0S0F-400.4W00.4FSUWAJNNNF-F-CONFFONF-NOCOOOCO[v32][b11642871161624410]]NNFLO1 NI- * F-F- C C C C C C C C C IF IF CIC CC C C C C C NNC-CA+ FFCC+NNN IF NXNCO*A 1100*CO-F-F-F-F-F-OF-F-OF- F-F-F-F-F-F-F-F- FI-F-FF- F-CO F- F- F- F- F- F- F-F-F-tENONNCOCOCOCOCOCOCOCOFIFACO CAIFUF-F-F-F-F- F-F-F-F-ZZCCXAZOZZZCZZ OCLOCLOCLOCLOCLOCLOCLfl0O0O0fl00000000UU0Fr0U[v32][b13262913181924790]]S0*ISCC*S0 *ZZZZZZZZZZZZFr 000A0CO0CA0AA0A0CA0A0I00100IF FF1111 FF1111 FF1111 FF1111 1111FF 110FF 41111 F-4FF 0FrFrFrFrFrFLFrOFLFrCFrFr0FrFrFrFrFrCaFr0O Fr'Fr FLFrFrFrFrFrFrZZFr0COCO N COFLCOCOCOCOCO0CO FF0011 OCOFLO 110011 CC FrFrFrFrFrFrFrFrFrFrOFrFrFrCLCLCLFL0FLFLFL0000000FL0[v32][b22192938131624990]]000 00WW0F-OE EACXULAEC0CACO0hThL0-J~0FLCLCLFLCLCLCLCLCLFLFLFLFLCLQQQQ000QQQQ000Q0Q0Q6 0CC 0e0w&w&N00000000NNS0000GQO00S r COCOt0100000NCOFr0CONA0FCOCO*FICON0OFO NCOtN0O0COCOtN0O0N0t0C0N00COCOtCCCCOF-0O000OOOOOO CC- 000 COCOCOCOCOCOCOCOtttttttttt0VIUUU0U1fl0010 F010 010 NNF-NNNl-NFC-F--00000000000C AFOCOCOC-IFC 00000000000000000000000000000000000000000000000000000 June 1984 41 Lance Schneider seated Apple lie home computer flash picture doesnt show computer display screen program presented article cant help wonder ing whether computers will become standard equipment future modelers workshops Ron Van finding proper cen consideration Ia dynamic center wir cookbook technique best rye found X Also calculate S vs use Next aerodyn zontal stabilizer de way using Figure 1 responding 8 thIs time being will note no rr far ca sidered fact will have two ted mess calculation corre conventional cam drnor between ta minus sign another term ermine distani centers er locate wn Figure 2 enter mass loc Jrcraft will statk test flights have able move ce er airplane response e second part gn providE v canard airc put vertical fins wings rather n fusel xlynamic ce, calculated vertical fin 3wi11 tell II Lilt size V about ec od shape its greater i4 SOS WING loops TAIL CG ---0-H small Convers rticaJ fins t04 rtical fin arE wr calculation nag about es N mmave Sri V 0000000000000000000000000oo J001 00mCr 00-0in0$ m 0 Cr -Jin inLCr 11WI- 15-J 0SCr in15 00 U-w 1'5 0 S .inC inn0 -Ja-cowo 00 00000 -0 0 a-u O -Cr wOlaw a-wmazm 00 rmm-ma-0 moocc0 0 Lo 0zZOOWC0Cr0 0\0100 0 5inc 0-0141-1j-Z 00000 IIin'0 1 0sO -00a-0~a-0Cr- CrCr' 4mCr0 0 0 Ca-0 '0 0w 00100-00 NJ *00 -J 5CrCa-.0 0 a-C CU0000Cr Cr 0 0000CrCr0m0J0 o Cr100-1f-r-OW0111 O 01-1 N--0 0-0 00aCII 0in-JLtJJNJ0Cr 111Z*J a-0 0000-ZrWaCi-'0CrCr00Z100 inc 0 Oil I- -JinXCrCr -LU01jJt5 Cr 011 Cr0 ---0 I-Cr 0 000151505-JO-Cr hin NI -0'-ZCrZ0--0 Il0O-01-J0a- 0--Cr000a-0 C a- IIlCr000 0 Cr00WOO000OW00 a-0 W Oh '019WCr010400CrCr-Cr40005 * * Cr J0 ciW3-.Cr0 cc1-0 0 00 00 00-Crc0- 0jJWin OCr00 CWJzJ00-0W ----- 00 1-a--0 55bLCrCrWCr015-ini-Cr0015-0W\N N\550 * 111001-1--Zn-000innCr5000 -.- 00000 000001-0in-01--WCr0Cr--000- Cr 000000 -4000 05W0 CrCr01-1-- Cr5Cr505S005in-1 **0**0flJmooIICrIfl--0 5 N 0 -- -is Cr00U-tinNCr 0 0 II-00'0* 00.WON CrCrI a-j 0 nn UIU 1-E.Cr0 000000 a- 00 000 a- 000 a-- 000001 *0000 a- 00 a- 00000OC a-mo * o a- * 0 * 0001- - a- a- a- a- -a-a-a-a-a-a- -a-a--- a-a-a-a-a-u a- a- a- a- a- a- - -0 a- 00 a- a- -Cr OCr -J -0000 a-a-a- 010 1101010101 C 0 0101 C Ott 0 t 0 0 0 0 t t 10100 U U U U 00100000000000 N N N N 1-N N N 00000000000000000000000000000000000 output data program provides surface areas wing horizontal stabilizer vertical fin fins aerodynamic centers surfaces lo cated balance point range given relation leading edge wing used formulas provided Van Nile computer add bal ance point location provide range Firebolt flown balance point extremes range program will also suggest balance point location airplane conventional configuration further information wing loading given have seen references indicating since canard surface also lifts wing does better wing loading calculation Continued page 146 42 Model Aviation drawings provided although thats necessary use program Edi tor readers convenience appro priate portions column reprinted herewith LEOS LASER * World Aerobatic Champion lop Quality Epoxy Glass Fuse loge Cowl & Wheel Pent /4 Aluminum Landing Gear Foam Wing90 Spun Wing Area 1440 sq inches Complete Step Step Solon Finish Kit structions Pictures Weight 16-20 lbs Engine 2-4 HP 9995 PLU S $1 * SHIPPING Direct-Sales Only ROUSH MFG JR3 STICK Ideal Trainer Ax Ontstnnding Relsa & Fosm Kit 72 Wing Spun wing Ares-liSt sq 12 5, Assembly Time weight t -12 lbs Engine Sixe 75 1 3 95 $7 9 PLUS SHIPPING Direct Sales Only COMING SOON Turbo BD Trainer 40&25 sizes Manufacturers Quality Kits Large Scale Engines GLOW lireb PLUGS NEW IMPROVED High Performance Glow Element e Blow Proof Seal o Six Types 3 Heat Ranges o Longer Life Only $129 Swanson Associates PO Box 151Since 7948 NJA Wayne 07470 TO ORDERSend $1200 plux $150 Shipping Packaging Charges ICalit Rasidents Add 6/s%SnlnsTax Hal Payne Enterprises 1843 W Torrance Blvd Torrance CA 90501 213 320-3068 Address Radio Technique/Myers Continued page 143 two receptacles RUDDER AUX Collective servo plugs GEAR receptacle sounds confusing have once Read instruction manual its English Airtronics gyro resembles Circus gyro its setup its actions see photo system arrived 94554 servos zero-slop ball-bearing isolated potentiometer coreless-motor high-torque waterproof servos Because Helicopters seem eat servos Ive encountered failures little hour service seven 10 hours first failure nor mal some folks will argue plainbearing isolated-potentiometer standardmotor servo sensible choice Such plain servos usually have some degree gear slop Experienced chopper pilots will tell tighter stronger quicker precise control system better will fly No argument about Most Helicopter troubles come sloppy controls bad adjustments So pays money takes choice might choose fly cheaper servos until youve got everything under control put expensive servos advanced training will need advantages real precision wish quantitative way assess good/bad Helicopter servo installations So far just use rubber appliances come servo screw down metal eyelets place avoid crushing rubber youve proven theres better way Id really like hear about believe cant prove pushrods should short stiff possible links should fit bellcranks servo wheels etc snug fit pos sible vibration standpoint ar rowshaft pushrod should better bicycle spoke use lot spokes just because Im lazy next guy main reason seeking another radio desire try inverted flying Wankel-powered Baron 20 Sure could easily put invert switch Apollo Im obeying wise old sage once said Dont mess around working system Last years OS 28H/Apollo/Kraft gyro/5R900 packlAce Silver SevenIKPS-24-equipped Baron 20 camera its back doing just fine Im leaving alone Ive long idea Wankel could natural Baron 20 way installation works out carburetor crankcase pressure fittings fall right Barons fuel tank centerline should ideal kinds flying Wankel offers better power/weight ratio reciprocating 28 less vibration runs faster led sunnise tht might spin main rotor faster never have tained 1300 1500 rpm manual says correct machine Spinning main rotor faster might permit flight smaller main-rotor pitch angle reversing pitch inverted flying should require less rework right So what happened Tune next month find out George M Myers 70 Froehlich Farm Rd Hicksville NY 11801 Computer/Sarpolus-Raad Continued page 42 would include canard area also program gives both answers engine loading pounds per cubic inch engine displacement added program interest shows sort calculations computer can easily vertical fin area analyzed according formula program advises area needed design contains excess area Firebolt design has excessive fin area flies well Explanation description pro gram program developed using Hewlett-Packard Model 9830 mini-computer consequently written HP BASIC version BASIC very similar variations language now used innumerable home computers program consists Display Input Computation Print commands 146 Model Aviation Canton OH 44707 Phone 216 484-6810 484-4374 TUNED PIPE CONNEC TOR $1200 Pat Appi aluminum sealed silicon 0 rings Easy install Simply insert header pipe tighten end caps - More Blowouta e No Unsightly Ties No Lost PIpes oniy inlng ever wear out lea 50 0 ring extra 0 rIng Included e SatIsfactIon Money Back Guaranteed Thin return uhlppleg label t LegIbly EBERLES IS YOUR HEADQUARTERS FOR HEHCOPTERS EBELE5 COMPLETE LINE OF HELICOPTERS PARTS & ACCESSORIES mm o COMPETiTOR PRO Fully aerobatic collective pitch plus new added bearings PROmodelwithENYA6OX. 43995 OS61FSR. 44995 ENYA chrome heli46995 OS 61FSRH heli46995 O ANNOUNCING ThE AVAILABILITY OF KAEr HEUCOFERS___ BARON 20-collective pitch. 18995 BARON SOA MARK Il rotation collective pitch .. 29995 BARON 502 om collective pitch36795 BARON 50- ustom Blackhead MK B46195 o CUSTOM HEU-BOY collective pitch automatic tail rotor compensation & aerobic kit ENYA 60X34995 OS 61FSR35995 ENYA chrome heli37995 OS 61FSRH heli37995 EJ SUPER MINI-BOY collective pitch autorotation tail ro tor compensation&aerobic kit ENYA 4OCX28495 ENYA 45CX29495 OS 4OFSR28995 OS 45F5R29995 o HEUCOPTER& ENGINE OMBO ENYA 60X OS 61FSR HP 61 old Cup ENYA 60X hell OS 61FSR sell Some engines limited please order soon Call pral sg O RADIOS Airtronics Fut iba JR & Kraft AIRTRONICS 6 channel hell standard254% JR Century seven 4501 servos25495 Send $2 complete catalog Z ORDERING INFORMATION ALL ORDERS SHIPPED DMLY UPSt~J 0-$25 add 350 $26$lOOadd4 505101 over add6 00 BLUE LABEL- held 30 days Pennsylvania Residents add 6% sales tax add 10% merchandise total COD charge $165 Payment Eberles simply take order will endeavor awer COD orders cash money order certified check fast service please question may have will assist recommending xight lp#&fr send certified check money order use credit card Personal checks wili particular needs along prompt service equals trouble free 0*w We Sell Helicopters & Fly Wel Co-Pilot Everytime Fly IRCEiS ~Phone 412 &9766 9- PM 586-7768CfWg-# 672 PITTSBURGH RD BUTLER PA 16001 own use machines cannot handle lines 80 characters special care taken keep computation lines shorter 32 characters Input Output statements can shortened split ting two lines should present no problem budding pro grammer As presented program occupies little less five kilobytes memory means can handled com puters little 8K RAM Most special features peculiar HP left out order make program uni versal introduction over well get down business perpendicular fuselage value zero no sweep leading edge swept-back value positive leading edge swept-forward value negative 6 B5 Total span horizontal stabilizer inches 7 R2 Stabilizer root chord similar 3 8 T2 Stabilizer tip chord similar 4 9 D2 Stabilizer leading edge sweep similar 5 10 V2 Number vertical fins vertical fins positioning have no effect balance point location input useful canard designs stability affected fin characteris tics Therefore dealing con ventional design wing ahead stab assign zero value program will skip inputs 11 15 11 133 Vertical fin height inches 12 R3 Fin root chord similar 3 7 13 T3 Fin tip chord similar 4 8 14 D3 Fin leading edge sweep similar 5 9 15 L3 Fin offset wing leading edge inches dimension locates leading edge vertical fin respect wing leading edge root 16 C Enter 2 canard 1 conContinued page 150 Input lines 90 530 order run program get results will need 19 pieces information explained follows 1 CS Model Designation 30-char acter field has provided identify design being analyzed field includes blanks can occupied letters nu merals symbols combination three Should need larger field sure redimension C$ line 10 2 134 Total wingspan inches 3 Rl Wing root chord inches Dis tance between leading edge trailing edge measured wing center 4 Tl Wing tip chord inches 5 Dl Leading edge sweep inches Distance tip relative root resulting leading edge sweep leading edge COMPLETE THIS FORM AND ATTACH MAILING LABEL FROM RECENT ISSuE LET US KNOW WHERE YOU ARE GOING move please let us know advancesix weeks requIred change address Attach current MA mailing label check appropriate box mail Subscrip tion Dept Model Aviation 1810 Samuel Morse Dr Reston VA 22090 Check appropriate boxenclose payment 0 NEW SUBSCRIPTION Efl CHANGE OF AGORESS Non-AMA subscription rates $1800 12 months US possessions elsewhere inciuding Canada Mexico $2400 US Schools $900 US Libraries $1350 NAME ADDRESS CITY/STATE ____________________________________________ ZIP _______________ MODEL AVIATION 1810 SAMUEL MORSE DR RESTON VA 22090 June 1984 147 REBEL a/c 861 1mm RoadSan Antonio TX 78216 512 341-6712 FUTABA 7FGKFM20995 6FGK FMSOLDOUT 7FGK18495 6FGK16495 SFGK15495 6FG15495 4FG14395 4L3-S/2810495 2F2/S-28-R4H7495 S-28SERVO1895 S-32SERVO2595 COVERINGS Momokote Opaque 3 Rolls1695 Monokole Trans 3 Rolls1695 Monokole Met. 3 Rolls2095 CYANOACRYLATE Hot Stuff MS-I e149 Hot Stuff HSTl e149 Hot Stuff HS4 2 Ounce499 Hot Stuff HST-4 2 Ounce499 Hot Shot245 Jet e179 Super Jet e179 Jet 2 Ounce599 Super Jet 2 Ounce599 EPOXY GLUE Deveon 30 Minute 9 Ounce595 Deveon 5 Minute 9 Ounce595 Hobbypoxy 8 Ounce359 Hobbypoxy IV 8 Ounce559 Hobbypoxy 1118 Ounce295 SULLIVAN MT #600 Starter2595 HID #601 Stance2695 HTI-24 #602 Starter3695 PLEASE NOTE Prices subject change manufacturers prices change Alt Items subject availability time sale Prices effect until next Model Aviation Issue Show room prices may slightly higher Visit show room San Antonio 100 discount price list refunded first order Shipping& Handling Prepald orders S390 COD Credit Card orders S595 Overseas orders add estimated shipping 25% deposit re4nired first lime COD 55% sales tax required Texas residents Personal checks detay shipping IS days Coming Soon ~ 1/5 SCALE RIO MODEL 62 SPAN NGINE CHANNEL R/C FOR ADVANCE INFO WRITE TO ST CROIX OF PARK FALLS LTD PO Box 2790 Park Falls WI 54552 Computer/Sarpolus-Raad Continued paqe 147 ventional configuration 17 Li Distance between stabilizer wing root inches length fuselage between wing stab 18 Wi Total weight ounces i9 E9 Engine size cubic inches structure program such prompt value of pa rameters listed above have enter particular value gets stored memory until used sub sequently Compute lines 540 850 Assuming input sequence performed correctly program performs com putations needed between lines 540 850 computations involve finding aero dynamic centers surfaces surface areas area moments balance point center gravity location wing loading en gine loading Output lines 860 1760 Lines 860 1760 mostly comprise PRINT routine output subdivided three parts Part IIdentifies program its function Part IlPrints out input parameters allows double-check input data Part IllPrints out findings programs neat format part labeled Output Data can seen sample printout included article summation story behind computer program usable assist de sign canard RC aircraft hope interest help Happy com puting RC Aerobatics/Van Putte Continued oaoe 45 has end sometime letter mentioned receiving earlier Ray Gareau Ville de Laval Que bec Canada described instruction program overcome beginners natural tendency turn left program coincided almost exactly decided obviously correct Seriously does work So slightly-edited version Rays technique Tell student cannot move feet just like concrete after takeoff once has sumed pilot position Start off flying natural horizontal Figure 8 Figure 1 fly until three four exactly same groove fly reversed Figure 8 will have quite length time reversed control application opposed regular 8 Fly until same proficiency ac quired first harder think try Procedure Turns Figures 3 4 just different 8s wish require attention will see fast can get disoriented comes reverse controlapplication level plane comes traffic pattern insist rectangular Otherwise pilots will end up some sort triangle gets final turn line up runway gets trouble turn 90 plane usually starts dive spiral Pilots should practice right-hand traffic/landing patterns since usually home left-hand approach Rays method does work believe big part reason its success student concentrating what hes supposed make airplane hes supposed emphasizes positive aspects flying results de-emphasis negative ones good example what mean found less-than-average-ability pilot de cided build Quickie 500 racer join monthly club races somewhat apprehensive about having him join us didnt make us feel better could barely land airplane first test flights decided coach him flying pylons What didnt know wanted close transmitter case got trouble After couple practice race sessions really started concentrating making good pylon turns make long story shorter did well con fidence soared could almost visual ize light going head Suddenly landings no problem him Hows song go Accentuate posi tive orks future columns Ill include sug gestions learning fly now want emphasize beginners should look help early ask questions theres no such thing dumb question listen experts never fly alone until instructor says its okay Ron Van Puue 111 Sleepy Oaks Rd Ft Walton Beach FL 32548 RC Soaring/Pruss Continued aae 47 current version Dohle eyes arent tricking After finetunes design rules whether its de signing yachts race cars Sailplanes bound something common among winning designs aesthetics usually signature designer trick stuff isnt apparent Synergy full trick stuff linkages Controls rudder elevator ailerons flaps latter two can mixed work jointly affect camber changes can also controlled independently other recent breakthrough airfoil design using 150 Model Aviation
Edition: Model Aviation - 1984/06
Page Numbers: 40, 41, 42, 146, 147, 150
i PRESENTED HERE computer program BASIC languageeasy use home computersto help design canard aircraft program simple will provide useful tool design work will also fun exercise youre learning use computer same time hobby use computers growing rapidly cost home com puters seems coming down just rapidly Judging local RC club mod elers getting computers theyre readily available now extent programs like can practical use ful Weve seen club newsletters heard discussions modelers already using computers hobby prob ably predominantely RC Soaringfor air foil analysis performance prediction wind tunnel data interpretation etc expect see computer programs presented model magazines future early stage starting off exciting direction use computers various programs can help advancement I{ C4t tt 1 44 C RC aeromodeling got involved effort during design Firebolt canard RC model fea tured issue mystery design ing canard determining location balance point size vertical fin area modelers design trial error procedure basing new design known successful past aircraft chang ing some dimensions see what happens can done successfully canard few existing aircraft use reference OOOOOOOOOOOOOOooooooooooooooOOOOOOOoOOooooooooooooooooc In* * 1 I-L** 1002 10** ItInII01* * rz- ** 0InIn0** 0002 1514 * * KIn 024W** 01 ILl 02** .In1-InIn10** 013 1302II* 01540100- * * tWIn- 02** 002In0It11** 3In IS * * 0000000 01 0- 0 5002 10 4 I-021-10In CIn 02 02In4 0DIn 115 InI-ItInO01 021 In00150-SI In020010 1 020 1-0 4WIn002 11 401002-Ol 34InIn0It21 ow In02 InIn4 0-InInC 02 0200-21 In00 210 15151'02ItIn 1110 01-cIInO0 0 1JInInIn0 0112-0-02ItIn10 02 r 0 InI 0201-1- 4In 00 021In021013 1InS I-In0 InOIn 150 0 InIn1In In 0 15120002 LOInII 0 0 15 ItIt.021In0 02 0In In 0- 15 03 0 020 InTh02100210- 4 0Z 1302 K15000In'1- 0001 010 1 0It 15 02 InIn3In 024In C 0It 0 415112InIn 0-15 0215 C In02 1- C 4 .2In1-InIn02In 1 C3 In15 02 002WInLI' 2102 1 02 0 1 0In 020313 15 002 0-In 2- 02020- I0200l 0202 InIn 015100- 0 -0*- 12 15 01-1 1 wa01Z ItOIn 102 InOIn 0 o 0 02 0 In.InInIn 02020 1 10-10 1502 nIt*In02W10It115 *-In 40 1 a01315010-15-J 11J 13 1310 1-o10- 1302 02112002 I- 1 1In InIn 21 -In02- COZInO 02-In- 0010151015 0 It02It0In0-02300 ,151-F-02In3154102002In0 02 1 1 -41 1 1515In02150215 1- F- 15 15 15 15 02115151515151515 2115151151It13It13It21It21It21It210 02 010 11111110- It02It02It0ItCOIt0 0- 114 InCInInIn In1111l 15 -InInInInInInInItItItTh 0-0-1010100- 0 02 InIn00-0-0-0-0-0-0-0 InInIn0SInS00InInInInInInIn00 15 InInInInIn0InInInIn.0111In1flOI-0201In-10111In11210110[v32][b24173012111425600]] .1J020211110120 11110C111140111111411JIJ0 11IFI\02 0 000000000 000 0000 00000000000000000000000000000c 40 Model Aviation K- 0 0 0 0 0 D D D Assist RC Canard Aircraft Design Home computers becoming more widespread perhaps time article computer can used modeling pur poses computer program printed using Ron Van Puttes formulas useful designing canards conventional air craft too U Dick Sarpolus Bernie Raad Aerodynamic formulas available sist us dont have aerodynamic engineers use Ron Van Putte writes MAs Sport Aerobatics column provides few additional answers balance point must move forward stab included several basic formulas necessary use area decreased balance point will canard design June 1980 column big advantage having computer move rear other variations can formulas provide center mass calculations ease performing considered working up new design balance point location canard number design variations variations can run through caldesign also indicate vertical fin work finalize new airplane culations until settle final airarea design sufficient course example looking canard design frame configuration desired computer program necessary wing swept-back further balance point recommend look Van use formulas program must move back As horizontal stabilizer Puttes June 1980 column complete makes easier faster get answers moved forward away wing explanation formulas along 00000000000000000000000000000000000000000000000000000 CFhi - C UAC LA CA U Fr Cd FCF-C0. FrCAFr 0I 000 CCC U ICEFr2 FrF- Fr IF0 F-F- Fr2 ILASCUW 4U CCZFCUFrO ZUC Fr0.rFrFr FrFLUCLLJ0I40LU 0OFLOF-00 CA I0LU 00W00 AAF- IF UOFFF F--FCLCAlFFrU FFOFrOCILFrO0 00- -FFF0JF0CFrFUFrOFF0 UFL U FrC C 0 0 FrFr FF CA FtCCF FCC0AJFr4UhF-C CF0 F- 0CF0FFFF0FAF Fr010 F-C-U 0NOFF L Fr CJ CCC F - IF FF CLA F\F CFFFr00 U 0 0 0U C Fr Fr-0Cli FFrFF000F-F IF 1-C FrI r-F- 1-FFr 0U 0 0 F-\N C- 0 IC.C1EUW EU U U 0F- COCCI-CCI CCI CCI CCIF FF0 FOILF 0 OF-LCE 11-lU LOll Fr CU C-C-XE CC Fr 0 CFACOFF ULL0.CU F-0N 0**CSO * CA NC 0 0FLFFOFFrF- UFr F FrOFrOC04F -Fr ACOF- OUFAW WA FrCAl C FLU U Fr F-F-COCOOCI CO CF 000 CI 0*Fr IF- F0000F- F uZCC UFrFI~ OCLUS FrS Ot- 0 0 F-UC F-NNCO* F- .A CA Cl0FF-FA0U EUE 0U UW Fr F- U 0 CO 0 CC-CO.CO COCOCO CAN U CA CA CA F 0F-U 0 F 0 F- 0FJFrFE Fr FrU IL0UUWZUFr Fr NF4F- 00 WF-FU0 0UFrFr U U 0. 4 Fr* * -CU*U W COCAAC 00 OOFA F FrC0FrFr 01 EU UFrF-0FrF-F- O EF- F- Fr 0101010 COFO0I0. U F C-FflE C- COW F N CICO F F-FrEE Fr F F-O-WW F-U C F-I0E'UCFr0 CE Fr F-Fr FL FL Fr Fr F- CC F- LA 00 FF-N NF-0 F-N00F-0J FrN 1 -C-ECO- 00 Fr F O-U OF OFrF-I4 CC- F C-COF-FLFL0IF-WFLCO F-U NON UCO 1 lUCO-CFFr ..C.FrO +-N* *-N CO*FC** *GF-LAIIJOJ S0NI-ACA FrFr ZFI-CCA4 1FF-C C C C NC C -C -C C C C 0S0S0S0F-400.4W00.4FSUWAJNNNF-F-CONFFONF-NOCOOOCO[v32][b11642871161624410]]NNFLO1 NI- * F-F- C C C C C C C C C IF IF CIC CC C C C C C NNC-CA+ FFCC+NNN IF NXNCO*A 1100*CO-F-F-F-F-F-OF-F-OF- F-F-F-F-F-F-F-F- FI-F-FF- F-CO F- F- F- F- F- F- F-F-F-tENONNCOCOCOCOCOCOCOCOFIFACO CAIFUF-F-F-F-F- F-F-F-F-ZZCCXAZOZZZCZZ OCLOCLOCLOCLOCLOCLOCLfl0O0O0fl00000000UU0Fr0U[v32][b13262913181924790]]S0*ISCC*S0 *ZZZZZZZZZZZZFr 000A0CO0CA0AA0A0CA0A0I00100IF FF1111 FF1111 FF1111 FF1111 1111FF 110FF 41111 F-4FF 0FrFrFrFrFrFLFrOFLFrCFrFr0FrFrFrFrFrCaFr0O Fr'Fr FLFrFrFrFrFrFrZZFr0COCO N COFLCOCOCOCOCO0CO FF0011 OCOFLO 110011 CC FrFrFrFrFrFrFrFrFrFrOFrFrFrCLCLCLFL0FLFLFL0000000FL0[v32][b22192938131624990]]000 00WW0F-OE EACXULAEC0CACO0hThL0-J~0FLCLCLFLCLCLCLCLCLFLFLFLFLCLQQQQ000QQQQ000Q0Q0Q6 0CC 0e0w&w&N00000000NNS0000GQO00S r COCOt0100000NCOFr0CONA0FCOCO*FICON0OFO NCOtN0O0COCOtN0O0N0t0C0N00COCOtCCCCOF-0O000OOOOOO CC- 000 COCOCOCOCOCOCOCOtttttttttt0VIUUU0U1fl0010 F010 010 NNF-NNNl-NFC-F--00000000000C AFOCOCOC-IFC 00000000000000000000000000000000000000000000000000000 June 1984 41 Lance Schneider seated Apple lie home computer flash picture doesnt show computer display screen program presented article cant help wonder ing whether computers will become standard equipment future modelers workshops Ron Van finding proper cen consideration Ia dynamic center wir cookbook technique best rye found X Also calculate S vs use Next aerodyn zontal stabilizer de way using Figure 1 responding 8 thIs time being will note no rr far ca sidered fact will have two ted mess calculation corre conventional cam drnor between ta minus sign another term ermine distani centers er locate wn Figure 2 enter mass loc Jrcraft will statk test flights have able move ce er airplane response e second part gn providE v canard airc put vertical fins wings rather n fusel xlynamic ce, calculated vertical fin 3wi11 tell II Lilt size V about ec od shape its greater i4 SOS WING loops TAIL CG ---0-H small Convers rticaJ fins t04 rtical fin arE wr calculation nag about es N mmave Sri V 0000000000000000000000000oo J001 00mCr 00-0in0$ m 0 Cr -Jin inLCr 11WI- 15-J 0SCr in15 00 U-w 1'5 0 S .inC inn0 -Ja-cowo 00 00000 -0 0 a-u O -Cr wOlaw a-wmazm 00 rmm-ma-0 moocc0 0 Lo 0zZOOWC0Cr0 0\0100 0 5inc 0-0141-1j-Z 00000 IIin'0 1 0sO -00a-0~a-0Cr- CrCr' 4mCr0 0 0 Ca-0 '0 0w 00100-00 NJ *00 -J 5CrCa-.0 0 a-C CU0000Cr Cr 0 0000CrCr0m0J0 o Cr100-1f-r-OW0111 O 01-1 N--0 0-0 00aCII 0in-JLtJJNJ0Cr 111Z*J a-0 0000-ZrWaCi-'0CrCr00Z100 inc 0 Oil I- -JinXCrCr -LU01jJt5 Cr 011 Cr0 ---0 I-Cr 0 000151505-JO-Cr hin NI -0'-ZCrZ0--0 Il0O-01-J0a- 0--Cr000a-0 C a- IIlCr000 0 Cr00WOO000OW00 a-0 W Oh '019WCr010400CrCr-Cr40005 * * Cr J0 ciW3-.Cr0 cc1-0 0 00 00 00-Crc0- 0jJWin OCr00 CWJzJ00-0W ----- 00 1-a--0 55bLCrCrWCr015-ini-Cr0015-0W\N N\550 * 111001-1--Zn-000innCr5000 -.- 00000 000001-0in-01--WCr0Cr--000- Cr 000000 -4000 05W0 CrCr01-1-- Cr5Cr505S005in-1 **0**0flJmooIICrIfl--0 5 N 0 -- -is Cr00U-tinNCr 0 0 II-00'0* 00.WON CrCrI a-j 0 nn UIU 1-E.Cr0 000000 a- 00 000 a- 000 a-- 000001 *0000 a- 00 a- 00000OC a-mo * o a- * 0 * 0001- - a- a- a- a- -a-a-a-a-a-a- -a-a--- a-a-a-a-a-u a- a- a- a- a- a- - -0 a- 00 a- a- -Cr OCr -J -0000 a-a-a- 010 1101010101 C 0 0101 C Ott 0 t 0 0 0 0 t t 10100 U U U U 00100000000000 N N N N 1-N N N 00000000000000000000000000000000000 output data program provides surface areas wing horizontal stabilizer vertical fin fins aerodynamic centers surfaces lo cated balance point range given relation leading edge wing used formulas provided Van Nile computer add bal ance point location provide range Firebolt flown balance point extremes range program will also suggest balance point location airplane conventional configuration further information wing loading given have seen references indicating since canard surface also lifts wing does better wing loading calculation Continued page 146 42 Model Aviation drawings provided although thats necessary use program Edi tor readers convenience appro priate portions column reprinted herewith LEOS LASER * World Aerobatic Champion lop Quality Epoxy Glass Fuse loge Cowl & Wheel Pent /4 Aluminum Landing Gear Foam Wing90 Spun Wing Area 1440 sq inches Complete Step Step Solon Finish Kit structions Pictures Weight 16-20 lbs Engine 2-4 HP 9995 PLU S $1 * SHIPPING Direct-Sales Only ROUSH MFG JR3 STICK Ideal Trainer Ax Ontstnnding Relsa & Fosm Kit 72 Wing Spun wing Ares-liSt sq 12 5, Assembly Time weight t -12 lbs Engine Sixe 75 1 3 95 $7 9 PLUS SHIPPING Direct Sales Only COMING SOON Turbo BD Trainer 40&25 sizes Manufacturers Quality Kits Large Scale Engines GLOW lireb PLUGS NEW IMPROVED High Performance Glow Element e Blow Proof Seal o Six Types 3 Heat Ranges o Longer Life Only $129 Swanson Associates PO Box 151Since 7948 NJA Wayne 07470 TO ORDERSend $1200 plux $150 Shipping Packaging Charges ICalit Rasidents Add 6/s%SnlnsTax Hal Payne Enterprises 1843 W Torrance Blvd Torrance CA 90501 213 320-3068 Address Radio Technique/Myers Continued page 143 two receptacles RUDDER AUX Collective servo plugs GEAR receptacle sounds confusing have once Read instruction manual its English Airtronics gyro resembles Circus gyro its setup its actions see photo system arrived 94554 servos zero-slop ball-bearing isolated potentiometer coreless-motor high-torque waterproof servos Because Helicopters seem eat servos Ive encountered failures little hour service seven 10 hours first failure nor mal some folks will argue plainbearing isolated-potentiometer standardmotor servo sensible choice Such plain servos usually have some degree gear slop Experienced chopper pilots will tell tighter stronger quicker precise control system better will fly No argument about Most Helicopter troubles come sloppy controls bad adjustments So pays money takes choice might choose fly cheaper servos until youve got everything under control put expensive servos advanced training will need advantages real precision wish quantitative way assess good/bad Helicopter servo installations So far just use rubber appliances come servo screw down metal eyelets place avoid crushing rubber youve proven theres better way Id really like hear about believe cant prove pushrods should short stiff possible links should fit bellcranks servo wheels etc snug fit pos sible vibration standpoint ar rowshaft pushrod should better bicycle spoke use lot spokes just because Im lazy next guy main reason seeking another radio desire try inverted flying Wankel-powered Baron 20 Sure could easily put invert switch Apollo Im obeying wise old sage once said Dont mess around working system Last years OS 28H/Apollo/Kraft gyro/5R900 packlAce Silver SevenIKPS-24-equipped Baron 20 camera its back doing just fine Im leaving alone Ive long idea Wankel could natural Baron 20 way installation works out carburetor crankcase pressure fittings fall right Barons fuel tank centerline should ideal kinds flying Wankel offers better power/weight ratio reciprocating 28 less vibration runs faster led sunnise tht might spin main rotor faster never have tained 1300 1500 rpm manual says correct machine Spinning main rotor faster might permit flight smaller main-rotor pitch angle reversing pitch inverted flying should require less rework right So what happened Tune next month find out George M Myers 70 Froehlich Farm Rd Hicksville NY 11801 Computer/Sarpolus-Raad Continued page 42 would include canard area also program gives both answers engine loading pounds per cubic inch engine displacement added program interest shows sort calculations computer can easily vertical fin area analyzed according formula program advises area needed design contains excess area Firebolt design has excessive fin area flies well Explanation description pro gram program developed using Hewlett-Packard Model 9830 mini-computer consequently written HP BASIC version BASIC very similar variations language now used innumerable home computers program consists Display Input Computation Print commands 146 Model Aviation Canton OH 44707 Phone 216 484-6810 484-4374 TUNED PIPE CONNEC TOR $1200 Pat Appi aluminum sealed silicon 0 rings Easy install Simply insert header pipe tighten end caps - More Blowouta e No Unsightly Ties No Lost PIpes oniy inlng ever wear out lea 50 0 ring extra 0 rIng Included e SatIsfactIon Money Back Guaranteed Thin return uhlppleg label t LegIbly EBERLES IS YOUR HEADQUARTERS FOR HEHCOPTERS EBELE5 COMPLETE LINE OF HELICOPTERS PARTS & ACCESSORIES mm o COMPETiTOR PRO Fully aerobatic collective pitch plus new added bearings PROmodelwithENYA6OX. 43995 OS61FSR. 44995 ENYA chrome heli46995 OS 61FSRH heli46995 O ANNOUNCING ThE AVAILABILITY OF KAEr HEUCOFERS___ BARON 20-collective pitch. 18995 BARON SOA MARK Il rotation collective pitch .. 29995 BARON 502 om collective pitch36795 BARON 50- ustom Blackhead MK B46195 o CUSTOM HEU-BOY collective pitch automatic tail rotor compensation & aerobic kit ENYA 60X34995 OS 61FSR35995 ENYA chrome heli37995 OS 61FSRH heli37995 EJ SUPER MINI-BOY collective pitch autorotation tail ro tor compensation&aerobic kit ENYA 4OCX28495 ENYA 45CX29495 OS 4OFSR28995 OS 45F5R29995 o HEUCOPTER& ENGINE OMBO ENYA 60X OS 61FSR HP 61 old Cup ENYA 60X hell OS 61FSR sell Some engines limited please order soon Call pral sg O RADIOS Airtronics Fut iba JR & Kraft AIRTRONICS 6 channel hell standard254% JR Century seven 4501 servos25495 Send $2 complete catalog Z ORDERING INFORMATION ALL ORDERS SHIPPED DMLY UPSt~J 0-$25 add 350 $26$lOOadd4 505101 over add6 00 BLUE LABEL- held 30 days Pennsylvania Residents add 6% sales tax add 10% merchandise total COD charge $165 Payment Eberles simply take order will endeavor awer COD orders cash money order certified check fast service please question may have will assist recommending xight lp#&fr send certified check money order use credit card Personal checks wili particular needs along prompt service equals trouble free 0*w We Sell Helicopters & Fly Wel Co-Pilot Everytime Fly IRCEiS ~Phone 412 &9766 9- PM 586-7768CfWg-# 672 PITTSBURGH RD BUTLER PA 16001 own use machines cannot handle lines 80 characters special care taken keep computation lines shorter 32 characters Input Output statements can shortened split ting two lines should present no problem budding pro grammer As presented program occupies little less five kilobytes memory means can handled com puters little 8K RAM Most special features peculiar HP left out order make program uni versal introduction over well get down business perpendicular fuselage value zero no sweep leading edge swept-back value positive leading edge swept-forward value negative 6 B5 Total span horizontal stabilizer inches 7 R2 Stabilizer root chord similar 3 8 T2 Stabilizer tip chord similar 4 9 D2 Stabilizer leading edge sweep similar 5 10 V2 Number vertical fins vertical fins positioning have no effect balance point location input useful canard designs stability affected fin characteris tics Therefore dealing con ventional design wing ahead stab assign zero value program will skip inputs 11 15 11 133 Vertical fin height inches 12 R3 Fin root chord similar 3 7 13 T3 Fin tip chord similar 4 8 14 D3 Fin leading edge sweep similar 5 9 15 L3 Fin offset wing leading edge inches dimension locates leading edge vertical fin respect wing leading edge root 16 C Enter 2 canard 1 conContinued page 150 Input lines 90 530 order run program get results will need 19 pieces information explained follows 1 CS Model Designation 30-char acter field has provided identify design being analyzed field includes blanks can occupied letters nu merals symbols combination three Should need larger field sure redimension C$ line 10 2 134 Total wingspan inches 3 Rl Wing root chord inches Dis tance between leading edge trailing edge measured wing center 4 Tl Wing tip chord inches 5 Dl Leading edge sweep inches Distance tip relative root resulting leading edge sweep leading edge COMPLETE THIS FORM AND ATTACH MAILING LABEL FROM RECENT ISSuE LET US KNOW WHERE YOU ARE GOING move please let us know advancesix weeks requIred change address Attach current MA mailing label check appropriate box mail Subscrip tion Dept Model Aviation 1810 Samuel Morse Dr Reston VA 22090 Check appropriate boxenclose payment 0 NEW SUBSCRIPTION Efl CHANGE OF AGORESS Non-AMA subscription rates $1800 12 months US possessions elsewhere inciuding Canada Mexico $2400 US Schools $900 US Libraries $1350 NAME ADDRESS CITY/STATE ____________________________________________ ZIP _______________ MODEL AVIATION 1810 SAMUEL MORSE DR RESTON VA 22090 June 1984 147 REBEL a/c 861 1mm RoadSan Antonio TX 78216 512 341-6712 FUTABA 7FGKFM20995 6FGK FMSOLDOUT 7FGK18495 6FGK16495 SFGK15495 6FG15495 4FG14395 4L3-S/2810495 2F2/S-28-R4H7495 S-28SERVO1895 S-32SERVO2595 COVERINGS Momokote Opaque 3 Rolls1695 Monokole Trans 3 Rolls1695 Monokole Met. 3 Rolls2095 CYANOACRYLATE Hot Stuff MS-I e149 Hot Stuff HSTl e149 Hot Stuff HS4 2 Ounce499 Hot Stuff HST-4 2 Ounce499 Hot Shot245 Jet e179 Super Jet e179 Jet 2 Ounce599 Super Jet 2 Ounce599 EPOXY GLUE Deveon 30 Minute 9 Ounce595 Deveon 5 Minute 9 Ounce595 Hobbypoxy 8 Ounce359 Hobbypoxy IV 8 Ounce559 Hobbypoxy 1118 Ounce295 SULLIVAN MT #600 Starter2595 HID #601 Stance2695 HTI-24 #602 Starter3695 PLEASE NOTE Prices subject change manufacturers prices change Alt Items subject availability time sale Prices effect until next Model Aviation Issue Show room prices may slightly higher Visit show room San Antonio 100 discount price list refunded first order Shipping& Handling Prepald orders S390 COD Credit Card orders S595 Overseas orders add estimated shipping 25% deposit re4nired first lime COD 55% sales tax required Texas residents Personal checks detay shipping IS days Coming Soon ~ 1/5 SCALE RIO MODEL 62 SPAN NGINE CHANNEL R/C FOR ADVANCE INFO WRITE TO ST CROIX OF PARK FALLS LTD PO Box 2790 Park Falls WI 54552 Computer/Sarpolus-Raad Continued paqe 147 ventional configuration 17 Li Distance between stabilizer wing root inches length fuselage between wing stab 18 Wi Total weight ounces i9 E9 Engine size cubic inches structure program such prompt value of pa rameters listed above have enter particular value gets stored memory until used sub sequently Compute lines 540 850 Assuming input sequence performed correctly program performs com putations needed between lines 540 850 computations involve finding aero dynamic centers surfaces surface areas area moments balance point center gravity location wing loading en gine loading Output lines 860 1760 Lines 860 1760 mostly comprise PRINT routine output subdivided three parts Part IIdentifies program its function Part IlPrints out input parameters allows double-check input data Part IllPrints out findings programs neat format part labeled Output Data can seen sample printout included article summation story behind computer program usable assist de sign canard RC aircraft hope interest help Happy com puting RC Aerobatics/Van Putte Continued oaoe 45 has end sometime letter mentioned receiving earlier Ray Gareau Ville de Laval Que bec Canada described instruction program overcome beginners natural tendency turn left program coincided almost exactly decided obviously correct Seriously does work So slightly-edited version Rays technique Tell student cannot move feet just like concrete after takeoff once has sumed pilot position Start off flying natural horizontal Figure 8 Figure 1 fly until three four exactly same groove fly reversed Figure 8 will have quite length time reversed control application opposed regular 8 Fly until same proficiency ac quired first harder think try Procedure Turns Figures 3 4 just different 8s wish require attention will see fast can get disoriented comes reverse controlapplication level plane comes traffic pattern insist rectangular Otherwise pilots will end up some sort triangle gets final turn line up runway gets trouble turn 90 plane usually starts dive spiral Pilots should practice right-hand traffic/landing patterns since usually home left-hand approach Rays method does work believe big part reason its success student concentrating what hes supposed make airplane hes supposed emphasizes positive aspects flying results de-emphasis negative ones good example what mean found less-than-average-ability pilot de cided build Quickie 500 racer join monthly club races somewhat apprehensive about having him join us didnt make us feel better could barely land airplane first test flights decided coach him flying pylons What didnt know wanted close transmitter case got trouble After couple practice race sessions really started concentrating making good pylon turns make long story shorter did well con fidence soared could almost visual ize light going head Suddenly landings no problem him Hows song go Accentuate posi tive orks future columns Ill include sug gestions learning fly now want emphasize beginners should look help early ask questions theres no such thing dumb question listen experts never fly alone until instructor says its okay Ron Van Puue 111 Sleepy Oaks Rd Ft Walton Beach FL 32548 RC Soaring/Pruss Continued aae 47 current version Dohle eyes arent tricking After finetunes design rules whether its de signing yachts race cars Sailplanes bound something common among winning designs aesthetics usually signature designer trick stuff isnt apparent Synergy full trick stuff linkages Controls rudder elevator ailerons flaps latter two can mixed work jointly affect camber changes can also controlled independently other recent breakthrough airfoil design using 150 Model Aviation
Edition: Model Aviation - 1984/06
Page Numbers: 40, 41, 42, 146, 147, 150
i PRESENTED HERE computer program BASIC languageeasy use home computersto help design canard aircraft program simple will provide useful tool design work will also fun exercise youre learning use computer same time hobby use computers growing rapidly cost home com puters seems coming down just rapidly Judging local RC club mod elers getting computers theyre readily available now extent programs like can practical use ful Weve seen club newsletters heard discussions modelers already using computers hobby prob ably predominantely RC Soaringfor air foil analysis performance prediction wind tunnel data interpretation etc expect see computer programs presented model magazines future early stage starting off exciting direction use computers various programs can help advancement I{ C4t tt 1 44 C RC aeromodeling got involved effort during design Firebolt canard RC model fea tured issue mystery design ing canard determining location balance point size vertical fin area modelers design trial error procedure basing new design known successful past aircraft chang ing some dimensions see what happens can done successfully canard few existing aircraft use reference OOOOOOOOOOOOOOooooooooooooooOOOOOOOoOOooooooooooooooooc In* * 1 I-L** 1002 10** ItInII01* * rz- ** 0InIn0** 0002 1514 * * KIn 024W** 01 ILl 02** .In1-InIn10** 013 1302II* 01540100- * * tWIn- 02** 002In0It11** 3In IS * * 0000000 01 0- 0 5002 10 4 I-021-10In CIn 02 02In4 0DIn 115 InI-ItInO01 021 In00150-SI In020010 1 020 1-0 4WIn002 11 401002-Ol 34InIn0It21 ow In02 InIn4 0-InInC 02 0200-21 In00 210 15151'02ItIn 1110 01-cIInO0 0 1JInInIn0 0112-0-02ItIn10 02 r 0 InI 0201-1- 4In 00 021In021013 1InS I-In0 InOIn 150 0 InIn1In In 0 15120002 LOInII 0 0 15 ItIt.021In0 02 0In In 0- 15 03 0 020 InTh02100210- 4 0Z 1302 K15000In'1- 0001 010 1 0It 15 02 InIn3In 024In C 0It 0 415112InIn 0-15 0215 C In02 1- C 4 .2In1-InIn02In 1 C3 In15 02 002WInLI' 2102 1 02 0 1 0In 020313 15 002 0-In 2- 02020- I0200l 0202 InIn 015100- 0 -0*- 12 15 01-1 1 wa01Z ItOIn 102 InOIn 0 o 0 02 0 In.InInIn 02020 1 10-10 1502 nIt*In02W10It115 *-In 40 1 a01315010-15-J 11J 13 1310 1-o10- 1302 02112002 I- 1 1In InIn 21 -In02- COZInO 02-In- 0010151015 0 It02It0In0-02300 ,151-F-02In3154102002In0 02 1 1 -41 1 1515In02150215 1- F- 15 15 15 15 02115151515151515 2115151151It13It13It21It21It21It210 02 010 11111110- It02It02It0ItCOIt0 0- 114 InCInInIn In1111l 15 -InInInInInInInItItItTh 0-0-1010100- 0 02 InIn00-0-0-0-0-0-0-0 InInIn0SInS00InInInInInInIn00 15 InInInInIn0InInInIn.0111In1flOI-0201In-10111In11210110[v32][b24173012111425600]] .1J020211110120 11110C111140111111411JIJ0 11IFI\02 0 000000000 000 0000 00000000000000000000000000000c 40 Model Aviation K- 0 0 0 0 0 D D D Assist RC Canard Aircraft Design Home computers becoming more widespread perhaps time article computer can used modeling pur poses computer program printed using Ron Van Puttes formulas useful designing canards conventional air craft too U Dick Sarpolus Bernie Raad Aerodynamic formulas available sist us dont have aerodynamic engineers use Ron Van Putte writes MAs Sport Aerobatics column provides few additional answers balance point must move forward stab included several basic formulas necessary use area decreased balance point will canard design June 1980 column big advantage having computer move rear other variations can formulas provide center mass calculations ease performing considered working up new design balance point location canard number design variations variations can run through caldesign also indicate vertical fin work finalize new airplane culations until settle final airarea design sufficient course example looking canard design frame configuration desired computer program necessary wing swept-back further balance point recommend look Van use formulas program must move back As horizontal stabilizer Puttes June 1980 column complete makes easier faster get answers moved forward away wing explanation formulas along 00000000000000000000000000000000000000000000000000000 CFhi - C UAC LA CA U Fr Cd FCF-C0. FrCAFr 0I 000 CCC U ICEFr2 FrF- Fr IF0 F-F- Fr2 ILASCUW 4U CCZFCUFrO ZUC Fr0.rFrFr FrFLUCLLJ0I40LU 0OFLOF-00 CA I0LU 00W00 AAF- IF UOFFF F--FCLCAlFFrU FFOFrOCILFrO0 00- -FFF0JF0CFrFUFrOFF0 UFL U FrC C 0 0 FrFr FF CA FtCCF FCC0AJFr4UhF-C CF0 F- 0CF0FFFF0FAF Fr010 F-C-U 0NOFF L Fr CJ CCC F - IF FF CLA F\F CFFFr00 U 0 0 0U C Fr Fr-0Cli FFrFF000F-F IF 1-C FrI r-F- 1-FFr 0U 0 0 F-\N C- 0 IC.C1EUW EU U U 0F- COCCI-CCI CCI CCI CCIF FF0 FOILF 0 OF-LCE 11-lU LOll Fr CU C-C-XE CC Fr 0 CFACOFF ULL0.CU F-0N 0**CSO * CA NC 0 0FLFFOFFrF- UFr F FrOFrOC04F -Fr ACOF- OUFAW WA FrCAl C FLU U Fr F-F-COCOOCI CO CF 000 CI 0*Fr IF- F0000F- F uZCC UFrFI~ OCLUS FrS Ot- 0 0 F-UC F-NNCO* F- .A CA Cl0FF-FA0U EUE 0U UW Fr F- U 0 CO 0 CC-CO.CO COCOCO CAN U CA CA CA F 0F-U 0 F 0 F- 0FJFrFE Fr FrU IL0UUWZUFr Fr NF4F- 00 WF-FU0 0UFrFr U U 0. 4 Fr* * -CU*U W COCAAC 00 OOFA F FrC0FrFr 01 EU UFrF-0FrF-F- O EF- F- Fr 0101010 COFO0I0. U F C-FflE C- COW F N CICO F F-FrEE Fr F F-O-WW F-U C F-I0E'UCFr0 CE Fr F-Fr FL FL Fr Fr F- CC F- LA 00 FF-N NF-0 F-N00F-0J FrN 1 -C-ECO- 00 Fr F O-U OF OFrF-I4 CC- F C-COF-FLFL0IF-WFLCO F-U NON UCO 1 lUCO-CFFr ..C.FrO +-N* *-N CO*FC** *GF-LAIIJOJ S0NI-ACA FrFr ZFI-CCA4 1FF-C C C C NC C -C -C C C C 0S0S0S0F-400.4W00.4FSUWAJNNNF-F-CONFFONF-NOCOOOCO[v32][b11642871161624410]]NNFLO1 NI- * F-F- C C C C C C C C C IF IF CIC CC C C C C C NNC-CA+ FFCC+NNN IF NXNCO*A 1100*CO-F-F-F-F-F-OF-F-OF- F-F-F-F-F-F-F-F- FI-F-FF- F-CO F- F- F- F- F- F- F-F-F-tENONNCOCOCOCOCOCOCOCOFIFACO CAIFUF-F-F-F-F- F-F-F-F-ZZCCXAZOZZZCZZ OCLOCLOCLOCLOCLOCLOCLfl0O0O0fl00000000UU0Fr0U[v32][b13262913181924790]]S0*ISCC*S0 *ZZZZZZZZZZZZFr 000A0CO0CA0AA0A0CA0A0I00100IF FF1111 FF1111 FF1111 FF1111 1111FF 110FF 41111 F-4FF 0FrFrFrFrFrFLFrOFLFrCFrFr0FrFrFrFrFrCaFr0O Fr'Fr FLFrFrFrFrFrFrZZFr0COCO N COFLCOCOCOCOCO0CO FF0011 OCOFLO 110011 CC FrFrFrFrFrFrFrFrFrFrOFrFrFrCLCLCLFL0FLFLFL0000000FL0[v32][b22192938131624990]]000 00WW0F-OE EACXULAEC0CACO0hThL0-J~0FLCLCLFLCLCLCLCLCLFLFLFLFLCLQQQQ000QQQQ000Q0Q0Q6 0CC 0e0w&w&N00000000NNS0000GQO00S r COCOt0100000NCOFr0CONA0FCOCO*FICON0OFO NCOtN0O0COCOtN0O0N0t0C0N00COCOtCCCCOF-0O000OOOOOO CC- 000 COCOCOCOCOCOCOCOtttttttttt0VIUUU0U1fl0010 F010 010 NNF-NNNl-NFC-F--00000000000C AFOCOCOC-IFC 00000000000000000000000000000000000000000000000000000 June 1984 41 Lance Schneider seated Apple lie home computer flash picture doesnt show computer display screen program presented article cant help wonder ing whether computers will become standard equipment future modelers workshops Ron Van finding proper cen consideration Ia dynamic center wir cookbook technique best rye found X Also calculate S vs use Next aerodyn zontal stabilizer de way using Figure 1 responding 8 thIs time being will note no rr far ca sidered fact will have two ted mess calculation corre conventional cam drnor between ta minus sign another term ermine distani centers er locate wn Figure 2 enter mass loc Jrcraft will statk test flights have able move ce er airplane response e second part gn providE v canard airc put vertical fins wings rather n fusel xlynamic ce, calculated vertical fin 3wi11 tell II Lilt size V about ec od shape its greater i4 SOS WING loops TAIL CG ---0-H small Convers rticaJ fins t04 rtical fin arE wr calculation nag about es N mmave Sri V 0000000000000000000000000oo J001 00mCr 00-0in0$ m 0 Cr -Jin inLCr 11WI- 15-J 0SCr in15 00 U-w 1'5 0 S .inC inn0 -Ja-cowo 00 00000 -0 0 a-u O -Cr wOlaw a-wmazm 00 rmm-ma-0 moocc0 0 Lo 0zZOOWC0Cr0 0\0100 0 5inc 0-0141-1j-Z 00000 IIin'0 1 0sO -00a-0~a-0Cr- CrCr' 4mCr0 0 0 Ca-0 '0 0w 00100-00 NJ *00 -J 5CrCa-.0 0 a-C CU0000Cr Cr 0 0000CrCr0m0J0 o Cr100-1f-r-OW0111 O 01-1 N--0 0-0 00aCII 0in-JLtJJNJ0Cr 111Z*J a-0 0000-ZrWaCi-'0CrCr00Z100 inc 0 Oil I- -JinXCrCr -LU01jJt5 Cr 011 Cr0 ---0 I-Cr 0 000151505-JO-Cr hin NI -0'-ZCrZ0--0 Il0O-01-J0a- 0--Cr000a-0 C a- IIlCr000 0 Cr00WOO000OW00 a-0 W Oh '019WCr010400CrCr-Cr40005 * * Cr J0 ciW3-.Cr0 cc1-0 0 00 00 00-Crc0- 0jJWin OCr00 CWJzJ00-0W ----- 00 1-a--0 55bLCrCrWCr015-ini-Cr0015-0W\N N\550 * 111001-1--Zn-000innCr5000 -.- 00000 000001-0in-01--WCr0Cr--000- Cr 000000 -4000 05W0 CrCr01-1-- Cr5Cr505S005in-1 **0**0flJmooIICrIfl--0 5 N 0 -- -is Cr00U-tinNCr 0 0 II-00'0* 00.WON CrCrI a-j 0 nn UIU 1-E.Cr0 000000 a- 00 000 a- 000 a-- 000001 *0000 a- 00 a- 00000OC a-mo * o a- * 0 * 0001- - a- a- a- a- -a-a-a-a-a-a- -a-a--- a-a-a-a-a-u a- a- a- a- a- a- - -0 a- 00 a- a- -Cr OCr -J -0000 a-a-a- 010 1101010101 C 0 0101 C Ott 0 t 0 0 0 0 t t 10100 U U U U 00100000000000 N N N N 1-N N N 00000000000000000000000000000000000 output data program provides surface areas wing horizontal stabilizer vertical fin fins aerodynamic centers surfaces lo cated balance point range given relation leading edge wing used formulas provided Van Nile computer add bal ance point location provide range Firebolt flown balance point extremes range program will also suggest balance point location airplane conventional configuration further information wing loading given have seen references indicating since canard surface also lifts wing does better wing loading calculation Continued page 146 42 Model Aviation drawings provided although thats necessary use program Edi tor readers convenience appro priate portions column reprinted herewith LEOS LASER * World Aerobatic Champion lop Quality Epoxy Glass Fuse loge Cowl & Wheel Pent /4 Aluminum Landing Gear Foam Wing90 Spun Wing Area 1440 sq inches Complete Step Step Solon Finish Kit structions Pictures Weight 16-20 lbs Engine 2-4 HP 9995 PLU S $1 * SHIPPING Direct-Sales Only ROUSH MFG JR3 STICK Ideal Trainer Ax Ontstnnding Relsa & Fosm Kit 72 Wing Spun wing Ares-liSt sq 12 5, Assembly Time weight t -12 lbs Engine Sixe 75 1 3 95 $7 9 PLUS SHIPPING Direct Sales Only COMING SOON Turbo BD Trainer 40&25 sizes Manufacturers Quality Kits Large Scale Engines GLOW lireb PLUGS NEW IMPROVED High Performance Glow Element e Blow Proof Seal o Six Types 3 Heat Ranges o Longer Life Only $129 Swanson Associates PO Box 151Since 7948 NJA Wayne 07470 TO ORDERSend $1200 plux $150 Shipping Packaging Charges ICalit Rasidents Add 6/s%SnlnsTax Hal Payne Enterprises 1843 W Torrance Blvd Torrance CA 90501 213 320-3068 Address Radio Technique/Myers Continued page 143 two receptacles RUDDER AUX Collective servo plugs GEAR receptacle sounds confusing have once Read instruction manual its English Airtronics gyro resembles Circus gyro its setup its actions see photo system arrived 94554 servos zero-slop ball-bearing isolated potentiometer coreless-motor high-torque waterproof servos Because Helicopters seem eat servos Ive encountered failures little hour service seven 10 hours first failure nor mal some folks will argue plainbearing isolated-potentiometer standardmotor servo sensible choice Such plain servos usually have some degree gear slop Experienced chopper pilots will tell tighter stronger quicker precise control system better will fly No argument about Most Helicopter troubles come sloppy controls bad adjustments So pays money takes choice might choose fly cheaper servos until youve got everything under control put expensive servos advanced training will need advantages real precision wish quantitative way assess good/bad Helicopter servo installations So far just use rubber appliances come servo screw down metal eyelets place avoid crushing rubber youve proven theres better way Id really like hear about believe cant prove pushrods should short stiff possible links should fit bellcranks servo wheels etc snug fit pos sible vibration standpoint ar rowshaft pushrod should better bicycle spoke use lot spokes just because Im lazy next guy main reason seeking another radio desire try inverted flying Wankel-powered Baron 20 Sure could easily put invert switch Apollo Im obeying wise old sage once said Dont mess around working system Last years OS 28H/Apollo/Kraft gyro/5R900 packlAce Silver SevenIKPS-24-equipped Baron 20 camera its back doing just fine Im leaving alone Ive long idea Wankel could natural Baron 20 way installation works out carburetor crankcase pressure fittings fall right Barons fuel tank centerline should ideal kinds flying Wankel offers better power/weight ratio reciprocating 28 less vibration runs faster led sunnise tht might spin main rotor faster never have tained 1300 1500 rpm manual says correct machine Spinning main rotor faster might permit flight smaller main-rotor pitch angle reversing pitch inverted flying should require less rework right So what happened Tune next month find out George M Myers 70 Froehlich Farm Rd Hicksville NY 11801 Computer/Sarpolus-Raad Continued page 42 would include canard area also program gives both answers engine loading pounds per cubic inch engine displacement added program interest shows sort calculations computer can easily vertical fin area analyzed according formula program advises area needed design contains excess area Firebolt design has excessive fin area flies well Explanation description pro gram program developed using Hewlett-Packard Model 9830 mini-computer consequently written HP BASIC version BASIC very similar variations language now used innumerable home computers program consists Display Input Computation Print commands 146 Model Aviation Canton OH 44707 Phone 216 484-6810 484-4374 TUNED PIPE CONNEC TOR $1200 Pat Appi aluminum sealed silicon 0 rings Easy install Simply insert header pipe tighten end caps - More Blowouta e No Unsightly Ties No Lost PIpes oniy inlng ever wear out lea 50 0 ring extra 0 rIng Included e SatIsfactIon Money Back Guaranteed Thin return uhlppleg label t LegIbly EBERLES IS YOUR HEADQUARTERS FOR HEHCOPTERS EBELE5 COMPLETE LINE OF HELICOPTERS PARTS & ACCESSORIES mm o COMPETiTOR PRO Fully aerobatic collective pitch plus new added bearings PROmodelwithENYA6OX. 43995 OS61FSR. 44995 ENYA chrome heli46995 OS 61FSRH heli46995 O ANNOUNCING ThE AVAILABILITY OF KAEr HEUCOFERS___ BARON 20-collective pitch. 18995 BARON SOA MARK Il rotation collective pitch .. 29995 BARON 502 om collective pitch36795 BARON 50- ustom Blackhead MK B46195 o CUSTOM HEU-BOY collective pitch automatic tail rotor compensation & aerobic kit ENYA 60X34995 OS 61FSR35995 ENYA chrome heli37995 OS 61FSRH heli37995 EJ SUPER MINI-BOY collective pitch autorotation tail ro tor compensation&aerobic kit ENYA 4OCX28495 ENYA 45CX29495 OS 4OFSR28995 OS 45F5R29995 o HEUCOPTER& ENGINE OMBO ENYA 60X OS 61FSR HP 61 old Cup ENYA 60X hell OS 61FSR sell Some engines limited please order soon Call pral sg O RADIOS Airtronics Fut iba JR & Kraft AIRTRONICS 6 channel hell standard254% JR Century seven 4501 servos25495 Send $2 complete catalog Z ORDERING INFORMATION ALL ORDERS SHIPPED DMLY UPSt~J 0-$25 add 350 $26$lOOadd4 505101 over add6 00 BLUE LABEL- held 30 days Pennsylvania Residents add 6% sales tax add 10% merchandise total COD charge $165 Payment Eberles simply take order will endeavor awer COD orders cash money order certified check fast service please question may have will assist recommending xight lp#&fr send certified check money order use credit card Personal checks wili particular needs along prompt service equals trouble free 0*w We Sell Helicopters & Fly Wel Co-Pilot Everytime Fly IRCEiS ~Phone 412 &9766 9- PM 586-7768CfWg-# 672 PITTSBURGH RD BUTLER PA 16001 own use machines cannot handle lines 80 characters special care taken keep computation lines shorter 32 characters Input Output statements can shortened split ting two lines should present no problem budding pro grammer As presented program occupies little less five kilobytes memory means can handled com puters little 8K RAM Most special features peculiar HP left out order make program uni versal introduction over well get down business perpendicular fuselage value zero no sweep leading edge swept-back value positive leading edge swept-forward value negative 6 B5 Total span horizontal stabilizer inches 7 R2 Stabilizer root chord similar 3 8 T2 Stabilizer tip chord similar 4 9 D2 Stabilizer leading edge sweep similar 5 10 V2 Number vertical fins vertical fins positioning have no effect balance point location input useful canard designs stability affected fin characteris tics Therefore dealing con ventional design wing ahead stab assign zero value program will skip inputs 11 15 11 133 Vertical fin height inches 12 R3 Fin root chord similar 3 7 13 T3 Fin tip chord similar 4 8 14 D3 Fin leading edge sweep similar 5 9 15 L3 Fin offset wing leading edge inches dimension locates leading edge vertical fin respect wing leading edge root 16 C Enter 2 canard 1 conContinued page 150 Input lines 90 530 order run program get results will need 19 pieces information explained follows 1 CS Model Designation 30-char acter field has provided identify design being analyzed field includes blanks can occupied letters nu merals symbols combination three Should need larger field sure redimension C$ line 10 2 134 Total wingspan inches 3 Rl Wing root chord inches Dis tance between leading edge trailing edge measured wing center 4 Tl Wing tip chord inches 5 Dl Leading edge sweep inches Distance tip relative root resulting leading edge sweep leading edge COMPLETE THIS FORM AND ATTACH MAILING LABEL FROM RECENT ISSuE LET US KNOW WHERE YOU ARE GOING move please let us know advancesix weeks requIred change address Attach current MA mailing label check appropriate box mail Subscrip tion Dept Model Aviation 1810 Samuel Morse Dr Reston VA 22090 Check appropriate boxenclose payment 0 NEW SUBSCRIPTION Efl CHANGE OF AGORESS Non-AMA subscription rates $1800 12 months US possessions elsewhere inciuding Canada Mexico $2400 US Schools $900 US Libraries $1350 NAME ADDRESS CITY/STATE ____________________________________________ ZIP _______________ MODEL AVIATION 1810 SAMUEL MORSE DR RESTON VA 22090 June 1984 147 REBEL a/c 861 1mm RoadSan Antonio TX 78216 512 341-6712 FUTABA 7FGKFM20995 6FGK FMSOLDOUT 7FGK18495 6FGK16495 SFGK15495 6FG15495 4FG14395 4L3-S/2810495 2F2/S-28-R4H7495 S-28SERVO1895 S-32SERVO2595 COVERINGS Momokote Opaque 3 Rolls1695 Monokole Trans 3 Rolls1695 Monokole Met. 3 Rolls2095 CYANOACRYLATE Hot Stuff MS-I e149 Hot Stuff HSTl e149 Hot Stuff HS4 2 Ounce499 Hot Stuff HST-4 2 Ounce499 Hot Shot245 Jet e179 Super Jet e179 Jet 2 Ounce599 Super Jet 2 Ounce599 EPOXY GLUE Deveon 30 Minute 9 Ounce595 Deveon 5 Minute 9 Ounce595 Hobbypoxy 8 Ounce359 Hobbypoxy IV 8 Ounce559 Hobbypoxy 1118 Ounce295 SULLIVAN MT #600 Starter2595 HID #601 Stance2695 HTI-24 #602 Starter3695 PLEASE NOTE Prices subject change manufacturers prices change Alt Items subject availability time sale Prices effect until next Model Aviation Issue Show room prices may slightly higher Visit show room San Antonio 100 discount price list refunded first order Shipping& Handling Prepald orders S390 COD Credit Card orders S595 Overseas orders add estimated shipping 25% deposit re4nired first lime COD 55% sales tax required Texas residents Personal checks detay shipping IS days Coming Soon ~ 1/5 SCALE RIO MODEL 62 SPAN NGINE CHANNEL R/C FOR ADVANCE INFO WRITE TO ST CROIX OF PARK FALLS LTD PO Box 2790 Park Falls WI 54552 Computer/Sarpolus-Raad Continued paqe 147 ventional configuration 17 Li Distance between stabilizer wing root inches length fuselage between wing stab 18 Wi Total weight ounces i9 E9 Engine size cubic inches structure program such prompt value of pa rameters listed above have enter particular value gets stored memory until used sub sequently Compute lines 540 850 Assuming input sequence performed correctly program performs com putations needed between lines 540 850 computations involve finding aero dynamic centers surfaces surface areas area moments balance point center gravity location wing loading en gine loading Output lines 860 1760 Lines 860 1760 mostly comprise PRINT routine output subdivided three parts Part IIdentifies program its function Part IlPrints out input parameters allows double-check input data Part IllPrints out findings programs neat format part labeled Output Data can seen sample printout included article summation story behind computer program usable assist de sign canard RC aircraft hope interest help Happy com puting RC Aerobatics/Van Putte Continued oaoe 45 has end sometime letter mentioned receiving earlier Ray Gareau Ville de Laval Que bec Canada described instruction program overcome beginners natural tendency turn left program coincided almost exactly decided obviously correct Seriously does work So slightly-edited version Rays technique Tell student cannot move feet just like concrete after takeoff once has sumed pilot position Start off flying natural horizontal Figure 8 Figure 1 fly until three four exactly same groove fly reversed Figure 8 will have quite length time reversed control application opposed regular 8 Fly until same proficiency ac quired first harder think try Procedure Turns Figures 3 4 just different 8s wish require attention will see fast can get disoriented comes reverse controlapplication level plane comes traffic pattern insist rectangular Otherwise pilots will end up some sort triangle gets final turn line up runway gets trouble turn 90 plane usually starts dive spiral Pilots should practice right-hand traffic/landing patterns since usually home left-hand approach Rays method does work believe big part reason its success student concentrating what hes supposed make airplane hes supposed emphasizes positive aspects flying results de-emphasis negative ones good example what mean found less-than-average-ability pilot de cided build Quickie 500 racer join monthly club races somewhat apprehensive about having him join us didnt make us feel better could barely land airplane first test flights decided coach him flying pylons What didnt know wanted close transmitter case got trouble After couple practice race sessions really started concentrating making good pylon turns make long story shorter did well con fidence soared could almost visual ize light going head Suddenly landings no problem him Hows song go Accentuate posi tive orks future columns Ill include sug gestions learning fly now want emphasize beginners should look help early ask questions theres no such thing dumb question listen experts never fly alone until instructor says its okay Ron Van Puue 111 Sleepy Oaks Rd Ft Walton Beach FL 32548 RC Soaring/Pruss Continued aae 47 current version Dohle eyes arent tricking After finetunes design rules whether its de signing yachts race cars Sailplanes bound something common among winning designs aesthetics usually signature designer trick stuff isnt apparent Synergy full trick stuff linkages Controls rudder elevator ailerons flaps latter two can mixed work jointly affect camber changes can also controlled independently other recent breakthrough airfoil design using 150 Model Aviation
Edition: Model Aviation - 1984/06
Page Numbers: 40, 41, 42, 146, 147, 150
i PRESENTED HERE computer program BASIC languageeasy use home computersto help design canard aircraft program simple will provide useful tool design work will also fun exercise youre learning use computer same time hobby use computers growing rapidly cost home com puters seems coming down just rapidly Judging local RC club mod elers getting computers theyre readily available now extent programs like can practical use ful Weve seen club newsletters heard discussions modelers already using computers hobby prob ably predominantely RC Soaringfor air foil analysis performance prediction wind tunnel data interpretation etc expect see computer programs presented model magazines future early stage starting off exciting direction use computers various programs can help advancement I{ C4t tt 1 44 C RC aeromodeling got involved effort during design Firebolt canard RC model fea tured issue mystery design ing canard determining location balance point size vertical fin area modelers design trial error procedure basing new design known successful past aircraft chang ing some dimensions see what happens can done successfully canard few existing aircraft use reference OOOOOOOOOOOOOOooooooooooooooOOOOOOOoOOooooooooooooooooc In* * 1 I-L** 1002 10** ItInII01* * rz- ** 0InIn0** 0002 1514 * * KIn 024W** 01 ILl 02** .In1-InIn10** 013 1302II* 01540100- * * tWIn- 02** 002In0It11** 3In IS * * 0000000 01 0- 0 5002 10 4 I-021-10In CIn 02 02In4 0DIn 115 InI-ItInO01 021 In00150-SI In020010 1 020 1-0 4WIn002 11 401002-Ol 34InIn0It21 ow In02 InIn4 0-InInC 02 0200-21 In00 210 15151'02ItIn 1110 01-cIInO0 0 1JInInIn0 0112-0-02ItIn10 02 r 0 InI 0201-1- 4In 00 021In021013 1InS I-In0 InOIn 150 0 InIn1In In 0 15120002 LOInII 0 0 15 ItIt.021In0 02 0In In 0- 15 03 0 020 InTh02100210- 4 0Z 1302 K15000In'1- 0001 010 1 0It 15 02 InIn3In 024In C 0It 0 415112InIn 0-15 0215 C In02 1- C 4 .2In1-InIn02In 1 C3 In15 02 002WInLI' 2102 1 02 0 1 0In 020313 15 002 0-In 2- 02020- I0200l 0202 InIn 015100- 0 -0*- 12 15 01-1 1 wa01Z ItOIn 102 InOIn 0 o 0 02 0 In.InInIn 02020 1 10-10 1502 nIt*In02W10It115 *-In 40 1 a01315010-15-J 11J 13 1310 1-o10- 1302 02112002 I- 1 1In InIn 21 -In02- COZInO 02-In- 0010151015 0 It02It0In0-02300 ,151-F-02In3154102002In0 02 1 1 -41 1 1515In02150215 1- F- 15 15 15 15 02115151515151515 2115151151It13It13It21It21It21It210 02 010 11111110- It02It02It0ItCOIt0 0- 114 InCInInIn In1111l 15 -InInInInInInInItItItTh 0-0-1010100- 0 02 InIn00-0-0-0-0-0-0-0 InInIn0SInS00InInInInInInIn00 15 InInInInIn0InInInIn.0111In1flOI-0201In-10111In11210110[v32][b24173012111425600]] .1J020211110120 11110C111140111111411JIJ0 11IFI\02 0 000000000 000 0000 00000000000000000000000000000c 40 Model Aviation K- 0 0 0 0 0 D D D Assist RC Canard Aircraft Design Home computers becoming more widespread perhaps time article computer can used modeling pur poses computer program printed using Ron Van Puttes formulas useful designing canards conventional air craft too U Dick Sarpolus Bernie Raad Aerodynamic formulas available sist us dont have aerodynamic engineers use Ron Van Putte writes MAs Sport Aerobatics column provides few additional answers balance point must move forward stab included several basic formulas necessary use area decreased balance point will canard design June 1980 column big advantage having computer move rear other variations can formulas provide center mass calculations ease performing considered working up new design balance point location canard number design variations variations can run through caldesign also indicate vertical fin work finalize new airplane culations until settle final airarea design sufficient course example looking canard design frame configuration desired computer program necessary wing swept-back further balance point recommend look Van use formulas program must move back As horizontal stabilizer Puttes June 1980 column complete makes easier faster get answers moved forward away wing explanation formulas along 00000000000000000000000000000000000000000000000000000 CFhi - C UAC LA CA U Fr Cd FCF-C0. FrCAFr 0I 000 CCC U ICEFr2 FrF- Fr IF0 F-F- Fr2 ILASCUW 4U CCZFCUFrO ZUC Fr0.rFrFr FrFLUCLLJ0I40LU 0OFLOF-00 CA I0LU 00W00 AAF- IF UOFFF F--FCLCAlFFrU FFOFrOCILFrO0 00- -FFF0JF0CFrFUFrOFF0 UFL U FrC C 0 0 FrFr FF CA FtCCF FCC0AJFr4UhF-C CF0 F- 0CF0FFFF0FAF Fr010 F-C-U 0NOFF L Fr CJ CCC F - IF FF CLA F\F CFFFr00 U 0 0 0U C Fr Fr-0Cli FFrFF000F-F IF 1-C FrI r-F- 1-FFr 0U 0 0 F-\N C- 0 IC.C1EUW EU U U 0F- COCCI-CCI CCI CCI CCIF FF0 FOILF 0 OF-LCE 11-lU LOll Fr CU C-C-XE CC Fr 0 CFACOFF ULL0.CU F-0N 0**CSO * CA NC 0 0FLFFOFFrF- UFr F FrOFrOC04F -Fr ACOF- OUFAW WA FrCAl C FLU U Fr F-F-COCOOCI CO CF 000 CI 0*Fr IF- F0000F- F uZCC UFrFI~ OCLUS FrS Ot- 0 0 F-UC F-NNCO* F- .A CA Cl0FF-FA0U EUE 0U UW Fr F- U 0 CO 0 CC-CO.CO COCOCO CAN U CA CA CA F 0F-U 0 F 0 F- 0FJFrFE Fr FrU IL0UUWZUFr Fr NF4F- 00 WF-FU0 0UFrFr U U 0. 4 Fr* * -CU*U W COCAAC 00 OOFA F FrC0FrFr 01 EU UFrF-0FrF-F- O EF- F- Fr 0101010 COFO0I0. U F C-FflE C- COW F N CICO F F-FrEE Fr F F-O-WW F-U C F-I0E'UCFr0 CE Fr F-Fr FL FL Fr Fr F- CC F- LA 00 FF-N NF-0 F-N00F-0J FrN 1 -C-ECO- 00 Fr F O-U OF OFrF-I4 CC- F C-COF-FLFL0IF-WFLCO F-U NON UCO 1 lUCO-CFFr ..C.FrO +-N* *-N CO*FC** *GF-LAIIJOJ S0NI-ACA FrFr ZFI-CCA4 1FF-C C C C NC C -C -C C C C 0S0S0S0F-400.4W00.4FSUWAJNNNF-F-CONFFONF-NOCOOOCO[v32][b11642871161624410]]NNFLO1 NI- * F-F- C C C C C C C C C IF IF CIC CC C C C C C NNC-CA+ FFCC+NNN IF NXNCO*A 1100*CO-F-F-F-F-F-OF-F-OF- F-F-F-F-F-F-F-F- FI-F-FF- F-CO F- F- F- F- F- F- F-F-F-tENONNCOCOCOCOCOCOCOCOFIFACO CAIFUF-F-F-F-F- F-F-F-F-ZZCCXAZOZZZCZZ OCLOCLOCLOCLOCLOCLOCLfl0O0O0fl00000000UU0Fr0U[v32][b13262913181924790]]S0*ISCC*S0 *ZZZZZZZZZZZZFr 000A0CO0CA0AA0A0CA0A0I00100IF FF1111 FF1111 FF1111 FF1111 1111FF 110FF 41111 F-4FF 0FrFrFrFrFrFLFrOFLFrCFrFr0FrFrFrFrFrCaFr0O Fr'Fr FLFrFrFrFrFrFrZZFr0COCO N COFLCOCOCOCOCO0CO FF0011 OCOFLO 110011 CC FrFrFrFrFrFrFrFrFrFrOFrFrFrCLCLCLFL0FLFLFL0000000FL0[v32][b22192938131624990]]000 00WW0F-OE EACXULAEC0CACO0hThL0-J~0FLCLCLFLCLCLCLCLCLFLFLFLFLCLQQQQ000QQQQ000Q0Q0Q6 0CC 0e0w&w&N00000000NNS0000GQO00S r COCOt0100000NCOFr0CONA0FCOCO*FICON0OFO NCOtN0O0COCOtN0O0N0t0C0N00COCOtCCCCOF-0O000OOOOOO CC- 000 COCOCOCOCOCOCOCOtttttttttt0VIUUU0U1fl0010 F010 010 NNF-NNNl-NFC-F--00000000000C AFOCOCOC-IFC 00000000000000000000000000000000000000000000000000000 June 1984 41 Lance Schneider seated Apple lie home computer flash picture doesnt show computer display screen program presented article cant help wonder ing whether computers will become standard equipment future modelers workshops Ron Van finding proper cen consideration Ia dynamic center wir cookbook technique best rye found X Also calculate S vs use Next aerodyn zontal stabilizer de way using Figure 1 responding 8 thIs time being will note no rr far ca sidered fact will have two ted mess calculation corre conventional cam drnor between ta minus sign another term ermine distani centers er locate wn Figure 2 enter mass loc Jrcraft will statk test flights have able move ce er airplane response e second part gn providE v canard airc put vertical fins wings rather n fusel xlynamic ce, calculated vertical fin 3wi11 tell II Lilt size V about ec od shape its greater i4 SOS WING loops TAIL CG ---0-H small Convers rticaJ fins t04 rtical fin arE wr calculation nag about es N mmave Sri V 0000000000000000000000000oo J001 00mCr 00-0in0$ m 0 Cr -Jin inLCr 11WI- 15-J 0SCr in15 00 U-w 1'5 0 S .inC inn0 -Ja-cowo 00 00000 -0 0 a-u O -Cr wOlaw a-wmazm 00 rmm-ma-0 moocc0 0 Lo 0zZOOWC0Cr0 0\0100 0 5inc 0-0141-1j-Z 00000 IIin'0 1 0sO -00a-0~a-0Cr- CrCr' 4mCr0 0 0 Ca-0 '0 0w 00100-00 NJ *00 -J 5CrCa-.0 0 a-C CU0000Cr Cr 0 0000CrCr0m0J0 o Cr100-1f-r-OW0111 O 01-1 N--0 0-0 00aCII 0in-JLtJJNJ0Cr 111Z*J a-0 0000-ZrWaCi-'0CrCr00Z100 inc 0 Oil I- -JinXCrCr -LU01jJt5 Cr 011 Cr0 ---0 I-Cr 0 000151505-JO-Cr hin NI -0'-ZCrZ0--0 Il0O-01-J0a- 0--Cr000a-0 C a- IIlCr000 0 Cr00WOO000OW00 a-0 W Oh '019WCr010400CrCr-Cr40005 * * Cr J0 ciW3-.Cr0 cc1-0 0 00 00 00-Crc0- 0jJWin OCr00 CWJzJ00-0W ----- 00 1-a--0 55bLCrCrWCr015-ini-Cr0015-0W\N N\550 * 111001-1--Zn-000innCr5000 -.- 00000 000001-0in-01--WCr0Cr--000- Cr 000000 -4000 05W0 CrCr01-1-- Cr5Cr505S005in-1 **0**0flJmooIICrIfl--0 5 N 0 -- -is Cr00U-tinNCr 0 0 II-00'0* 00.WON CrCrI a-j 0 nn UIU 1-E.Cr0 000000 a- 00 000 a- 000 a-- 000001 *0000 a- 00 a- 00000OC a-mo * o a- * 0 * 0001- - a- a- a- a- -a-a-a-a-a-a- -a-a--- a-a-a-a-a-u a- a- a- a- a- a- - -0 a- 00 a- a- -Cr OCr -J -0000 a-a-a- 010 1101010101 C 0 0101 C Ott 0 t 0 0 0 0 t t 10100 U U U U 00100000000000 N N N N 1-N N N 00000000000000000000000000000000000 output data program provides surface areas wing horizontal stabilizer vertical fin fins aerodynamic centers surfaces lo cated balance point range given relation leading edge wing used formulas provided Van Nile computer add bal ance point location provide range Firebolt flown balance point extremes range program will also suggest balance point location airplane conventional configuration further information wing loading given have seen references indicating since canard surface also lifts wing does better wing loading calculation Continued page 146 42 Model Aviation drawings provided although thats necessary use program Edi tor readers convenience appro priate portions column reprinted herewith LEOS LASER * World Aerobatic Champion lop Quality Epoxy Glass Fuse loge Cowl & Wheel Pent /4 Aluminum Landing Gear Foam Wing90 Spun Wing Area 1440 sq inches Complete Step Step Solon Finish Kit structions Pictures Weight 16-20 lbs Engine 2-4 HP 9995 PLU S $1 * SHIPPING Direct-Sales Only ROUSH MFG JR3 STICK Ideal Trainer Ax Ontstnnding Relsa & Fosm Kit 72 Wing Spun wing Ares-liSt sq 12 5, Assembly Time weight t -12 lbs Engine Sixe 75 1 3 95 $7 9 PLUS SHIPPING Direct Sales Only COMING SOON Turbo BD Trainer 40&25 sizes Manufacturers Quality Kits Large Scale Engines GLOW lireb PLUGS NEW IMPROVED High Performance Glow Element e Blow Proof Seal o Six Types 3 Heat Ranges o Longer Life Only $129 Swanson Associates PO Box 151Since 7948 NJA Wayne 07470 TO ORDERSend $1200 plux $150 Shipping Packaging Charges ICalit Rasidents Add 6/s%SnlnsTax Hal Payne Enterprises 1843 W Torrance Blvd Torrance CA 90501 213 320-3068 Address Radio Technique/Myers Continued page 143 two receptacles RUDDER AUX Collective servo plugs GEAR receptacle sounds confusing have once Read instruction manual its English Airtronics gyro resembles Circus gyro its setup its actions see photo system arrived 94554 servos zero-slop ball-bearing isolated potentiometer coreless-motor high-torque waterproof servos Because Helicopters seem eat servos Ive encountered failures little hour service seven 10 hours first failure nor mal some folks will argue plainbearing isolated-potentiometer standardmotor servo sensible choice Such plain servos usually have some degree gear slop Experienced chopper pilots will tell tighter stronger quicker precise control system better will fly No argument about Most Helicopter troubles come sloppy controls bad adjustments So pays money takes choice might choose fly cheaper servos until youve got everything under control put expensive servos advanced training will need advantages real precision wish quantitative way assess good/bad Helicopter servo installations So far just use rubber appliances come servo screw down metal eyelets place avoid crushing rubber youve proven theres better way Id really like hear about believe cant prove pushrods should short stiff possible links should fit bellcranks servo wheels etc snug fit pos sible vibration standpoint ar rowshaft pushrod should better bicycle spoke use lot spokes just because Im lazy next guy main reason seeking another radio desire try inverted flying Wankel-powered Baron 20 Sure could easily put invert switch Apollo Im obeying wise old sage once said Dont mess around working system Last years OS 28H/Apollo/Kraft gyro/5R900 packlAce Silver SevenIKPS-24-equipped Baron 20 camera its back doing just fine Im leaving alone Ive long idea Wankel could natural Baron 20 way installation works out carburetor crankcase pressure fittings fall right Barons fuel tank centerline should ideal kinds flying Wankel offers better power/weight ratio reciprocating 28 less vibration runs faster led sunnise tht might spin main rotor faster never have tained 1300 1500 rpm manual says correct machine Spinning main rotor faster might permit flight smaller main-rotor pitch angle reversing pitch inverted flying should require less rework right So what happened Tune next month find out George M Myers 70 Froehlich Farm Rd Hicksville NY 11801 Computer/Sarpolus-Raad Continued page 42 would include canard area also program gives both answers engine loading pounds per cubic inch engine displacement added program interest shows sort calculations computer can easily vertical fin area analyzed according formula program advises area needed design contains excess area Firebolt design has excessive fin area flies well Explanation description pro gram program developed using Hewlett-Packard Model 9830 mini-computer consequently written HP BASIC version BASIC very similar variations language now used innumerable home computers program consists Display Input Computation Print commands 146 Model Aviation Canton OH 44707 Phone 216 484-6810 484-4374 TUNED PIPE CONNEC TOR $1200 Pat Appi aluminum sealed silicon 0 rings Easy install Simply insert header pipe tighten end caps - More Blowouta e No Unsightly Ties No Lost PIpes oniy inlng ever wear out lea 50 0 ring extra 0 rIng Included e SatIsfactIon Money Back Guaranteed Thin return uhlppleg label t LegIbly EBERLES IS YOUR HEADQUARTERS FOR HEHCOPTERS EBELE5 COMPLETE LINE OF HELICOPTERS PARTS & ACCESSORIES mm o COMPETiTOR PRO Fully aerobatic collective pitch plus new added bearings PROmodelwithENYA6OX. 43995 OS61FSR. 44995 ENYA chrome heli46995 OS 61FSRH heli46995 O ANNOUNCING ThE AVAILABILITY OF KAEr HEUCOFERS___ BARON 20-collective pitch. 18995 BARON SOA MARK Il rotation collective pitch .. 29995 BARON 502 om collective pitch36795 BARON 50- ustom Blackhead MK B46195 o CUSTOM HEU-BOY collective pitch automatic tail rotor compensation & aerobic kit ENYA 60X34995 OS 61FSR35995 ENYA chrome heli37995 OS 61FSRH heli37995 EJ SUPER MINI-BOY collective pitch autorotation tail ro tor compensation&aerobic kit ENYA 4OCX28495 ENYA 45CX29495 OS 4OFSR28995 OS 45F5R29995 o HEUCOPTER& ENGINE OMBO ENYA 60X OS 61FSR HP 61 old Cup ENYA 60X hell OS 61FSR sell Some engines limited please order soon Call pral sg O RADIOS Airtronics Fut iba JR & Kraft AIRTRONICS 6 channel hell standard254% JR Century seven 4501 servos25495 Send $2 complete catalog Z ORDERING INFORMATION ALL ORDERS SHIPPED DMLY UPSt~J 0-$25 add 350 $26$lOOadd4 505101 over add6 00 BLUE LABEL- held 30 days Pennsylvania Residents add 6% sales tax add 10% merchandise total COD charge $165 Payment Eberles simply take order will endeavor awer COD orders cash money order certified check fast service please question may have will assist recommending xight lp#&fr send certified check money order use credit card Personal checks wili particular needs along prompt service equals trouble free 0*w We Sell Helicopters & Fly Wel Co-Pilot Everytime Fly IRCEiS ~Phone 412 &9766 9- PM 586-7768CfWg-# 672 PITTSBURGH RD BUTLER PA 16001 own use machines cannot handle lines 80 characters special care taken keep computation lines shorter 32 characters Input Output statements can shortened split ting two lines should present no problem budding pro grammer As presented program occupies little less five kilobytes memory means can handled com puters little 8K RAM Most special features peculiar HP left out order make program uni versal introduction over well get down business perpendicular fuselage value zero no sweep leading edge swept-back value positive leading edge swept-forward value negative 6 B5 Total span horizontal stabilizer inches 7 R2 Stabilizer root chord similar 3 8 T2 Stabilizer tip chord similar 4 9 D2 Stabilizer leading edge sweep similar 5 10 V2 Number vertical fins vertical fins positioning have no effect balance point location input useful canard designs stability affected fin characteris tics Therefore dealing con ventional design wing ahead stab assign zero value program will skip inputs 11 15 11 133 Vertical fin height inches 12 R3 Fin root chord similar 3 7 13 T3 Fin tip chord similar 4 8 14 D3 Fin leading edge sweep similar 5 9 15 L3 Fin offset wing leading edge inches dimension locates leading edge vertical fin respect wing leading edge root 16 C Enter 2 canard 1 conContinued page 150 Input lines 90 530 order run program get results will need 19 pieces information explained follows 1 CS Model Designation 30-char acter field has provided identify design being analyzed field includes blanks can occupied letters nu merals symbols combination three Should need larger field sure redimension C$ line 10 2 134 Total wingspan inches 3 Rl Wing root chord inches Dis tance between leading edge trailing edge measured wing center 4 Tl Wing tip chord inches 5 Dl Leading edge sweep inches Distance tip relative root resulting leading edge sweep leading edge COMPLETE THIS FORM AND ATTACH MAILING LABEL FROM RECENT ISSuE LET US KNOW WHERE YOU ARE GOING move please let us know advancesix weeks requIred change address Attach current MA mailing label check appropriate box mail Subscrip tion Dept Model Aviation 1810 Samuel Morse Dr Reston VA 22090 Check appropriate boxenclose payment 0 NEW SUBSCRIPTION Efl CHANGE OF AGORESS Non-AMA subscription rates $1800 12 months US possessions elsewhere inciuding Canada Mexico $2400 US Schools $900 US Libraries $1350 NAME ADDRESS CITY/STATE ____________________________________________ ZIP _______________ MODEL AVIATION 1810 SAMUEL MORSE DR RESTON VA 22090 June 1984 147 REBEL a/c 861 1mm RoadSan Antonio TX 78216 512 341-6712 FUTABA 7FGKFM20995 6FGK FMSOLDOUT 7FGK18495 6FGK16495 SFGK15495 6FG15495 4FG14395 4L3-S/2810495 2F2/S-28-R4H7495 S-28SERVO1895 S-32SERVO2595 COVERINGS Momokote Opaque 3 Rolls1695 Monokole Trans 3 Rolls1695 Monokole Met. 3 Rolls2095 CYANOACRYLATE Hot Stuff MS-I e149 Hot Stuff HSTl e149 Hot Stuff HS4 2 Ounce499 Hot Stuff HST-4 2 Ounce499 Hot Shot245 Jet e179 Super Jet e179 Jet 2 Ounce599 Super Jet 2 Ounce599 EPOXY GLUE Deveon 30 Minute 9 Ounce595 Deveon 5 Minute 9 Ounce595 Hobbypoxy 8 Ounce359 Hobbypoxy IV 8 Ounce559 Hobbypoxy 1118 Ounce295 SULLIVAN MT #600 Starter2595 HID #601 Stance2695 HTI-24 #602 Starter3695 PLEASE NOTE Prices subject change manufacturers prices change Alt Items subject availability time sale Prices effect until next Model Aviation Issue Show room prices may slightly higher Visit show room San Antonio 100 discount price list refunded first order Shipping& Handling Prepald orders S390 COD Credit Card orders S595 Overseas orders add estimated shipping 25% deposit re4nired first lime COD 55% sales tax required Texas residents Personal checks detay shipping IS days Coming Soon ~ 1/5 SCALE RIO MODEL 62 SPAN NGINE CHANNEL R/C FOR ADVANCE INFO WRITE TO ST CROIX OF PARK FALLS LTD PO Box 2790 Park Falls WI 54552 Computer/Sarpolus-Raad Continued paqe 147 ventional configuration 17 Li Distance between stabilizer wing root inches length fuselage between wing stab 18 Wi Total weight ounces i9 E9 Engine size cubic inches structure program such prompt value of pa rameters listed above have enter particular value gets stored memory until used sub sequently Compute lines 540 850 Assuming input sequence performed correctly program performs com putations needed between lines 540 850 computations involve finding aero dynamic centers surfaces surface areas area moments balance point center gravity location wing loading en gine loading Output lines 860 1760 Lines 860 1760 mostly comprise PRINT routine output subdivided three parts Part IIdentifies program its function Part IlPrints out input parameters allows double-check input data Part IllPrints out findings programs neat format part labeled Output Data can seen sample printout included article summation story behind computer program usable assist de sign canard RC aircraft hope interest help Happy com puting RC Aerobatics/Van Putte Continued oaoe 45 has end sometime letter mentioned receiving earlier Ray Gareau Ville de Laval Que bec Canada described instruction program overcome beginners natural tendency turn left program coincided almost exactly decided obviously correct Seriously does work So slightly-edited version Rays technique Tell student cannot move feet just like concrete after takeoff once has sumed pilot position Start off flying natural horizontal Figure 8 Figure 1 fly until three four exactly same groove fly reversed Figure 8 will have quite length time reversed control application opposed regular 8 Fly until same proficiency ac quired first harder think try Procedure Turns Figures 3 4 just different 8s wish require attention will see fast can get disoriented comes reverse controlapplication level plane comes traffic pattern insist rectangular Otherwise pilots will end up some sort triangle gets final turn line up runway gets trouble turn 90 plane usually starts dive spiral Pilots should practice right-hand traffic/landing patterns since usually home left-hand approach Rays method does work believe big part reason its success student concentrating what hes supposed make airplane hes supposed emphasizes positive aspects flying results de-emphasis negative ones good example what mean found less-than-average-ability pilot de cided build Quickie 500 racer join monthly club races somewhat apprehensive about having him join us didnt make us feel better could barely land airplane first test flights decided coach him flying pylons What didnt know wanted close transmitter case got trouble After couple practice race sessions really started concentrating making good pylon turns make long story shorter did well con fidence soared could almost visual ize light going head Suddenly landings no problem him Hows song go Accentuate posi tive orks future columns Ill include sug gestions learning fly now want emphasize beginners should look help early ask questions theres no such thing dumb question listen experts never fly alone until instructor says its okay Ron Van Puue 111 Sleepy Oaks Rd Ft Walton Beach FL 32548 RC Soaring/Pruss Continued aae 47 current version Dohle eyes arent tricking After finetunes design rules whether its de signing yachts race cars Sailplanes bound something common among winning designs aesthetics usually signature designer trick stuff isnt apparent Synergy full trick stuff linkages Controls rudder elevator ailerons flaps latter two can mixed work jointly affect camber changes can also controlled independently other recent breakthrough airfoil design using 150 Model Aviation
Edition: Model Aviation - 1984/06
Page Numbers: 40, 41, 42, 146, 147, 150
i PRESENTED HERE computer program BASIC languageeasy use home computersto help design canard aircraft program simple will provide useful tool design work will also fun exercise youre learning use computer same time hobby use computers growing rapidly cost home com puters seems coming down just rapidly Judging local RC club mod elers getting computers theyre readily available now extent programs like can practical use ful Weve seen club newsletters heard discussions modelers already using computers hobby prob ably predominantely RC Soaringfor air foil analysis performance prediction wind tunnel data interpretation etc expect see computer programs presented model magazines future early stage starting off exciting direction use computers various programs can help advancement I{ C4t tt 1 44 C RC aeromodeling got involved effort during design Firebolt canard RC model fea tured issue mystery design ing canard determining location balance point size vertical fin area modelers design trial error procedure basing new design known successful past aircraft chang ing some dimensions see what happens can done successfully canard few existing aircraft use reference OOOOOOOOOOOOOOooooooooooooooOOOOOOOoOOooooooooooooooooc In* * 1 I-L** 1002 10** ItInII01* * rz- ** 0InIn0** 0002 1514 * * KIn 024W** 01 ILl 02** .In1-InIn10** 013 1302II* 01540100- * * tWIn- 02** 002In0It11** 3In IS * * 0000000 01 0- 0 5002 10 4 I-021-10In CIn 02 02In4 0DIn 115 InI-ItInO01 021 In00150-SI In020010 1 020 1-0 4WIn002 11 401002-Ol 34InIn0It21 ow In02 InIn4 0-InInC 02 0200-21 In00 210 15151'02ItIn 1110 01-cIInO0 0 1JInInIn0 0112-0-02ItIn10 02 r 0 InI 0201-1- 4In 00 021In021013 1InS I-In0 InOIn 150 0 InIn1In In 0 15120002 LOInII 0 0 15 ItIt.021In0 02 0In In 0- 15 03 0 020 InTh02100210- 4 0Z 1302 K15000In'1- 0001 010 1 0It 15 02 InIn3In 024In C 0It 0 415112InIn 0-15 0215 C In02 1- C 4 .2In1-InIn02In 1 C3 In15 02 002WInLI' 2102 1 02 0 1 0In 020313 15 002 0-In 2- 02020- I0200l 0202 InIn 015100- 0 -0*- 12 15 01-1 1 wa01Z ItOIn 102 InOIn 0 o 0 02 0 In.InInIn 02020 1 10-10 1502 nIt*In02W10It115 *-In 40 1 a01315010-15-J 11J 13 1310 1-o10- 1302 02112002 I- 1 1In InIn 21 -In02- COZInO 02-In- 0010151015 0 It02It0In0-02300 ,151-F-02In3154102002In0 02 1 1 -41 1 1515In02150215 1- F- 15 15 15 15 02115151515151515 2115151151It13It13It21It21It21It210 02 010 11111110- It02It02It0ItCOIt0 0- 114 InCInInIn In1111l 15 -InInInInInInInItItItTh 0-0-1010100- 0 02 InIn00-0-0-0-0-0-0-0 InInIn0SInS00InInInInInInIn00 15 InInInInIn0InInInIn.0111In1flOI-0201In-10111In11210110[v32][b24173012111425600]] .1J020211110120 11110C111140111111411JIJ0 11IFI\02 0 000000000 000 0000 00000000000000000000000000000c 40 Model Aviation K- 0 0 0 0 0 D D D Assist RC Canard Aircraft Design Home computers becoming more widespread perhaps time article computer can used modeling pur poses computer program printed using Ron Van Puttes formulas useful designing canards conventional air craft too U Dick Sarpolus Bernie Raad Aerodynamic formulas available sist us dont have aerodynamic engineers use Ron Van Putte writes MAs Sport Aerobatics column provides few additional answers balance point must move forward stab included several basic formulas necessary use area decreased balance point will canard design June 1980 column big advantage having computer move rear other variations can formulas provide center mass calculations ease performing considered working up new design balance point location canard number design variations variations can run through caldesign also indicate vertical fin work finalize new airplane culations until settle final airarea design sufficient course example looking canard design frame configuration desired computer program necessary wing swept-back further balance point recommend look Van use formulas program must move back As horizontal stabilizer Puttes June 1980 column complete makes easier faster get answers moved forward away wing explanation formulas along 00000000000000000000000000000000000000000000000000000 CFhi - C UAC LA CA U Fr Cd FCF-C0. FrCAFr 0I 000 CCC U ICEFr2 FrF- Fr IF0 F-F- Fr2 ILASCUW 4U CCZFCUFrO ZUC Fr0.rFrFr FrFLUCLLJ0I40LU 0OFLOF-00 CA I0LU 00W00 AAF- IF UOFFF F--FCLCAlFFrU FFOFrOCILFrO0 00- -FFF0JF0CFrFUFrOFF0 UFL U FrC C 0 0 FrFr FF CA FtCCF FCC0AJFr4UhF-C CF0 F- 0CF0FFFF0FAF Fr010 F-C-U 0NOFF L Fr CJ CCC F - IF FF CLA F\F CFFFr00 U 0 0 0U C Fr Fr-0Cli FFrFF000F-F IF 1-C FrI r-F- 1-FFr 0U 0 0 F-\N C- 0 IC.C1EUW EU U U 0F- COCCI-CCI CCI CCI CCIF FF0 FOILF 0 OF-LCE 11-lU LOll Fr CU C-C-XE CC Fr 0 CFACOFF ULL0.CU F-0N 0**CSO * CA NC 0 0FLFFOFFrF- UFr F FrOFrOC04F -Fr ACOF- OUFAW WA FrCAl C FLU U Fr F-F-COCOOCI CO CF 000 CI 0*Fr IF- F0000F- F uZCC UFrFI~ OCLUS FrS Ot- 0 0 F-UC F-NNCO* F- .A CA Cl0FF-FA0U EUE 0U UW Fr F- U 0 CO 0 CC-CO.CO COCOCO CAN U CA CA CA F 0F-U 0 F 0 F- 0FJFrFE Fr FrU IL0UUWZUFr Fr NF4F- 00 WF-FU0 0UFrFr U U 0. 4 Fr* * -CU*U W COCAAC 00 OOFA F FrC0FrFr 01 EU UFrF-0FrF-F- O EF- F- Fr 0101010 COFO0I0. U F C-FflE C- COW F N CICO F F-FrEE Fr F F-O-WW F-U C F-I0E'UCFr0 CE Fr F-Fr FL FL Fr Fr F- CC F- LA 00 FF-N NF-0 F-N00F-0J FrN 1 -C-ECO- 00 Fr F O-U OF OFrF-I4 CC- F C-COF-FLFL0IF-WFLCO F-U NON UCO 1 lUCO-CFFr ..C.FrO +-N* *-N CO*FC** *GF-LAIIJOJ S0NI-ACA FrFr ZFI-CCA4 1FF-C C C C NC C -C -C C C C 0S0S0S0F-400.4W00.4FSUWAJNNNF-F-CONFFONF-NOCOOOCO[v32][b11642871161624410]]NNFLO1 NI- * F-F- C C C C C C C C C IF IF CIC CC C C C C C NNC-CA+ FFCC+NNN IF NXNCO*A 1100*CO-F-F-F-F-F-OF-F-OF- F-F-F-F-F-F-F-F- FI-F-FF- F-CO F- F- F- F- F- F- F-F-F-tENONNCOCOCOCOCOCOCOCOFIFACO CAIFUF-F-F-F-F- F-F-F-F-ZZCCXAZOZZZCZZ OCLOCLOCLOCLOCLOCLOCLfl0O0O0fl00000000UU0Fr0U[v32][b13262913181924790]]S0*ISCC*S0 *ZZZZZZZZZZZZFr 000A0CO0CA0AA0A0CA0A0I00100IF FF1111 FF1111 FF1111 FF1111 1111FF 110FF 41111 F-4FF 0FrFrFrFrFrFLFrOFLFrCFrFr0FrFrFrFrFrCaFr0O Fr'Fr FLFrFrFrFrFrFrZZFr0COCO N COFLCOCOCOCOCO0CO FF0011 OCOFLO 110011 CC FrFrFrFrFrFrFrFrFrFrOFrFrFrCLCLCLFL0FLFLFL0000000FL0[v32][b22192938131624990]]000 00WW0F-OE EACXULAEC0CACO0hThL0-J~0FLCLCLFLCLCLCLCLCLFLFLFLFLCLQQQQ000QQQQ000Q0Q0Q6 0CC 0e0w&w&N00000000NNS0000GQO00S r COCOt0100000NCOFr0CONA0FCOCO*FICON0OFO NCOtN0O0COCOtN0O0N0t0C0N00COCOtCCCCOF-0O000OOOOOO CC- 000 COCOCOCOCOCOCOCOtttttttttt0VIUUU0U1fl0010 F010 010 NNF-NNNl-NFC-F--00000000000C AFOCOCOC-IFC 00000000000000000000000000000000000000000000000000000 June 1984 41 Lance Schneider seated Apple lie home computer flash picture doesnt show computer display screen program presented article cant help wonder ing whether computers will become standard equipment future modelers workshops Ron Van finding proper cen consideration Ia dynamic center wir cookbook technique best rye found X Also calculate S vs use Next aerodyn zontal stabilizer de way using Figure 1 responding 8 thIs time being will note no rr far ca sidered fact will have two ted mess calculation corre conventional cam drnor between ta minus sign another term ermine distani centers er locate wn Figure 2 enter mass loc Jrcraft will statk test flights have able move ce er airplane response e second part gn providE v canard airc put vertical fins wings rather n fusel xlynamic ce, calculated vertical fin 3wi11 tell II Lilt size V about ec od shape its greater i4 SOS WING loops TAIL CG ---0-H small Convers rticaJ fins t04 rtical fin arE wr calculation nag about es N mmave Sri V 0000000000000000000000000oo J001 00mCr 00-0in0$ m 0 Cr -Jin inLCr 11WI- 15-J 0SCr in15 00 U-w 1'5 0 S .inC inn0 -Ja-cowo 00 00000 -0 0 a-u O -Cr wOlaw a-wmazm 00 rmm-ma-0 moocc0 0 Lo 0zZOOWC0Cr0 0\0100 0 5inc 0-0141-1j-Z 00000 IIin'0 1 0sO -00a-0~a-0Cr- CrCr' 4mCr0 0 0 Ca-0 '0 0w 00100-00 NJ *00 -J 5CrCa-.0 0 a-C CU0000Cr Cr 0 0000CrCr0m0J0 o Cr100-1f-r-OW0111 O 01-1 N--0 0-0 00aCII 0in-JLtJJNJ0Cr 111Z*J a-0 0000-ZrWaCi-'0CrCr00Z100 inc 0 Oil I- -JinXCrCr -LU01jJt5 Cr 011 Cr0 ---0 I-Cr 0 000151505-JO-Cr hin NI -0'-ZCrZ0--0 Il0O-01-J0a- 0--Cr000a-0 C a- IIlCr000 0 Cr00WOO000OW00 a-0 W Oh '019WCr010400CrCr-Cr40005 * * Cr J0 ciW3-.Cr0 cc1-0 0 00 00 00-Crc0- 0jJWin OCr00 CWJzJ00-0W ----- 00 1-a--0 55bLCrCrWCr015-ini-Cr0015-0W\N N\550 * 111001-1--Zn-000innCr5000 -.- 00000 000001-0in-01--WCr0Cr--000- Cr 000000 -4000 05W0 CrCr01-1-- Cr5Cr505S005in-1 **0**0flJmooIICrIfl--0 5 N 0 -- -is Cr00U-tinNCr 0 0 II-00'0* 00.WON CrCrI a-j 0 nn UIU 1-E.Cr0 000000 a- 00 000 a- 000 a-- 000001 *0000 a- 00 a- 00000OC a-mo * o a- * 0 * 0001- - a- a- a- a- -a-a-a-a-a-a- -a-a--- a-a-a-a-a-u a- a- a- a- a- a- - -0 a- 00 a- a- -Cr OCr -J -0000 a-a-a- 010 1101010101 C 0 0101 C Ott 0 t 0 0 0 0 t t 10100 U U U U 00100000000000 N N N N 1-N N N 00000000000000000000000000000000000 output data program provides surface areas wing horizontal stabilizer vertical fin fins aerodynamic centers surfaces lo cated balance point range given relation leading edge wing used formulas provided Van Nile computer add bal ance point location provide range Firebolt flown balance point extremes range program will also suggest balance point location airplane conventional configuration further information wing loading given have seen references indicating since canard surface also lifts wing does better wing loading calculation Continued page 146 42 Model Aviation drawings provided although thats necessary use program Edi tor readers convenience appro priate portions column reprinted herewith LEOS LASER * World Aerobatic Champion lop Quality Epoxy Glass Fuse loge Cowl & Wheel Pent /4 Aluminum Landing Gear Foam Wing90 Spun Wing Area 1440 sq inches Complete Step Step Solon Finish Kit structions Pictures Weight 16-20 lbs Engine 2-4 HP 9995 PLU S $1 * SHIPPING Direct-Sales Only ROUSH MFG JR3 STICK Ideal Trainer Ax Ontstnnding Relsa & Fosm Kit 72 Wing Spun wing Ares-liSt sq 12 5, Assembly Time weight t -12 lbs Engine Sixe 75 1 3 95 $7 9 PLUS SHIPPING Direct Sales Only COMING SOON Turbo BD Trainer 40&25 sizes Manufacturers Quality Kits Large Scale Engines GLOW lireb PLUGS NEW IMPROVED High Performance Glow Element e Blow Proof Seal o Six Types 3 Heat Ranges o Longer Life Only $129 Swanson Associates PO Box 151Since 7948 NJA Wayne 07470 TO ORDERSend $1200 plux $150 Shipping Packaging Charges ICalit Rasidents Add 6/s%SnlnsTax Hal Payne Enterprises 1843 W Torrance Blvd Torrance CA 90501 213 320-3068 Address Radio Technique/Myers Continued page 143 two receptacles RUDDER AUX Collective servo plugs GEAR receptacle sounds confusing have once Read instruction manual its English Airtronics gyro resembles Circus gyro its setup its actions see photo system arrived 94554 servos zero-slop ball-bearing isolated potentiometer coreless-motor high-torque waterproof servos Because Helicopters seem eat servos Ive encountered failures little hour service seven 10 hours first failure nor mal some folks will argue plainbearing isolated-potentiometer standardmotor servo sensible choice Such plain servos usually have some degree gear slop Experienced chopper pilots will tell tighter stronger quicker precise control system better will fly No argument about Most Helicopter troubles come sloppy controls bad adjustments So pays money takes choice might choose fly cheaper servos until youve got everything under control put expensive servos advanced training will need advantages real precision wish quantitative way assess good/bad Helicopter servo installations So far just use rubber appliances come servo screw down metal eyelets place avoid crushing rubber youve proven theres better way Id really like hear about believe cant prove pushrods should short stiff possible links should fit bellcranks servo wheels etc snug fit pos sible vibration standpoint ar rowshaft pushrod should better bicycle spoke use lot spokes just because Im lazy next guy main reason seeking another radio desire try inverted flying Wankel-powered Baron 20 Sure could easily put invert switch Apollo Im obeying wise old sage once said Dont mess around working system Last years OS 28H/Apollo/Kraft gyro/5R900 packlAce Silver SevenIKPS-24-equipped Baron 20 camera its back doing just fine Im leaving alone Ive long idea Wankel could natural Baron 20 way installation works out carburetor crankcase pressure fittings fall right Barons fuel tank centerline should ideal kinds flying Wankel offers better power/weight ratio reciprocating 28 less vibration runs faster led sunnise tht might spin main rotor faster never have tained 1300 1500 rpm manual says correct machine Spinning main rotor faster might permit flight smaller main-rotor pitch angle reversing pitch inverted flying should require less rework right So what happened Tune next month find out George M Myers 70 Froehlich Farm Rd Hicksville NY 11801 Computer/Sarpolus-Raad Continued page 42 would include canard area also program gives both answers engine loading pounds per cubic inch engine displacement added program interest shows sort calculations computer can easily vertical fin area analyzed according formula program advises area needed design contains excess area Firebolt design has excessive fin area flies well Explanation description pro gram program developed using Hewlett-Packard Model 9830 mini-computer consequently written HP BASIC version BASIC very similar variations language now used innumerable home computers program consists Display Input Computation Print commands 146 Model Aviation Canton OH 44707 Phone 216 484-6810 484-4374 TUNED PIPE CONNEC TOR $1200 Pat Appi aluminum sealed silicon 0 rings Easy install Simply insert header pipe tighten end caps - More Blowouta e No Unsightly Ties No Lost PIpes oniy inlng ever wear out lea 50 0 ring extra 0 rIng Included e SatIsfactIon Money Back Guaranteed Thin return uhlppleg label t LegIbly EBERLES IS YOUR HEADQUARTERS FOR HEHCOPTERS EBELE5 COMPLETE LINE OF HELICOPTERS PARTS & ACCESSORIES mm o COMPETiTOR PRO Fully aerobatic collective pitch plus new added bearings PROmodelwithENYA6OX. 43995 OS61FSR. 44995 ENYA chrome heli46995 OS 61FSRH heli46995 O ANNOUNCING ThE AVAILABILITY OF KAEr HEUCOFERS___ BARON 20-collective pitch. 18995 BARON SOA MARK Il rotation collective pitch .. 29995 BARON 502 om collective pitch36795 BARON 50- ustom Blackhead MK B46195 o CUSTOM HEU-BOY collective pitch automatic tail rotor compensation & aerobic kit ENYA 60X34995 OS 61FSR35995 ENYA chrome heli37995 OS 61FSRH heli37995 EJ SUPER MINI-BOY collective pitch autorotation tail ro tor compensation&aerobic kit ENYA 4OCX28495 ENYA 45CX29495 OS 4OFSR28995 OS 45F5R29995 o HEUCOPTER& ENGINE OMBO ENYA 60X OS 61FSR HP 61 old Cup ENYA 60X hell OS 61FSR sell Some engines limited please order soon Call pral sg O RADIOS Airtronics Fut iba JR & Kraft AIRTRONICS 6 channel hell standard254% JR Century seven 4501 servos25495 Send $2 complete catalog Z ORDERING INFORMATION ALL ORDERS SHIPPED DMLY UPSt~J 0-$25 add 350 $26$lOOadd4 505101 over add6 00 BLUE LABEL- held 30 days Pennsylvania Residents add 6% sales tax add 10% merchandise total COD charge $165 Payment Eberles simply take order will endeavor awer COD orders cash money order certified check fast service please question may have will assist recommending xight lp#&fr send certified check money order use credit card Personal checks wili particular needs along prompt service equals trouble free 0*w We Sell Helicopters & Fly Wel Co-Pilot Everytime Fly IRCEiS ~Phone 412 &9766 9- PM 586-7768CfWg-# 672 PITTSBURGH RD BUTLER PA 16001 own use machines cannot handle lines 80 characters special care taken keep computation lines shorter 32 characters Input Output statements can shortened split ting two lines should present no problem budding pro grammer As presented program occupies little less five kilobytes memory means can handled com puters little 8K RAM Most special features peculiar HP left out order make program uni versal introduction over well get down business perpendicular fuselage value zero no sweep leading edge swept-back value positive leading edge swept-forward value negative 6 B5 Total span horizontal stabilizer inches 7 R2 Stabilizer root chord similar 3 8 T2 Stabilizer tip chord similar 4 9 D2 Stabilizer leading edge sweep similar 5 10 V2 Number vertical fins vertical fins positioning have no effect balance point location input useful canard designs stability affected fin characteris tics Therefore dealing con ventional design wing ahead stab assign zero value program will skip inputs 11 15 11 133 Vertical fin height inches 12 R3 Fin root chord similar 3 7 13 T3 Fin tip chord similar 4 8 14 D3 Fin leading edge sweep similar 5 9 15 L3 Fin offset wing leading edge inches dimension locates leading edge vertical fin respect wing leading edge root 16 C Enter 2 canard 1 conContinued page 150 Input lines 90 530 order run program get results will need 19 pieces information explained follows 1 CS Model Designation 30-char acter field has provided identify design being analyzed field includes blanks can occupied letters nu merals symbols combination three Should need larger field sure redimension C$ line 10 2 134 Total wingspan inches 3 Rl Wing root chord inches Dis tance between leading edge trailing edge measured wing center 4 Tl Wing tip chord inches 5 Dl Leading edge sweep inches Distance tip relative root resulting leading edge sweep leading edge COMPLETE THIS FORM AND ATTACH MAILING LABEL FROM RECENT ISSuE LET US KNOW WHERE YOU ARE GOING move please let us know advancesix weeks requIred change address Attach current MA mailing label check appropriate box mail Subscrip tion Dept Model Aviation 1810 Samuel Morse Dr Reston VA 22090 Check appropriate boxenclose payment 0 NEW SUBSCRIPTION Efl CHANGE OF AGORESS Non-AMA subscription rates $1800 12 months US possessions elsewhere inciuding Canada Mexico $2400 US Schools $900 US Libraries $1350 NAME ADDRESS CITY/STATE ____________________________________________ ZIP _______________ MODEL AVIATION 1810 SAMUEL MORSE DR RESTON VA 22090 June 1984 147 REBEL a/c 861 1mm RoadSan Antonio TX 78216 512 341-6712 FUTABA 7FGKFM20995 6FGK FMSOLDOUT 7FGK18495 6FGK16495 SFGK15495 6FG15495 4FG14395 4L3-S/2810495 2F2/S-28-R4H7495 S-28SERVO1895 S-32SERVO2595 COVERINGS Momokote Opaque 3 Rolls1695 Monokole Trans 3 Rolls1695 Monokole Met. 3 Rolls2095 CYANOACRYLATE Hot Stuff MS-I e149 Hot Stuff HSTl e149 Hot Stuff HS4 2 Ounce499 Hot Stuff HST-4 2 Ounce499 Hot Shot245 Jet e179 Super Jet e179 Jet 2 Ounce599 Super Jet 2 Ounce599 EPOXY GLUE Deveon 30 Minute 9 Ounce595 Deveon 5 Minute 9 Ounce595 Hobbypoxy 8 Ounce359 Hobbypoxy IV 8 Ounce559 Hobbypoxy 1118 Ounce295 SULLIVAN MT #600 Starter2595 HID #601 Stance2695 HTI-24 #602 Starter3695 PLEASE NOTE Prices subject change manufacturers prices change Alt Items subject availability time sale Prices effect until next Model Aviation Issue Show room prices may slightly higher Visit show room San Antonio 100 discount price list refunded first order Shipping& Handling Prepald orders S390 COD Credit Card orders S595 Overseas orders add estimated shipping 25% deposit re4nired first lime COD 55% sales tax required Texas residents Personal checks detay shipping IS days Coming Soon ~ 1/5 SCALE RIO MODEL 62 SPAN NGINE CHANNEL R/C FOR ADVANCE INFO WRITE TO ST CROIX OF PARK FALLS LTD PO Box 2790 Park Falls WI 54552 Computer/Sarpolus-Raad Continued paqe 147 ventional configuration 17 Li Distance between stabilizer wing root inches length fuselage between wing stab 18 Wi Total weight ounces i9 E9 Engine size cubic inches structure program such prompt value of pa rameters listed above have enter particular value gets stored memory until used sub sequently Compute lines 540 850 Assuming input sequence performed correctly program performs com putations needed between lines 540 850 computations involve finding aero dynamic centers surfaces surface areas area moments balance point center gravity location wing loading en gine loading Output lines 860 1760 Lines 860 1760 mostly comprise PRINT routine output subdivided three parts Part IIdentifies program its function Part IlPrints out input parameters allows double-check input data Part IllPrints out findings programs neat format part labeled Output Data can seen sample printout included article summation story behind computer program usable assist de sign canard RC aircraft hope interest help Happy com puting RC Aerobatics/Van Putte Continued oaoe 45 has end sometime letter mentioned receiving earlier Ray Gareau Ville de Laval Que bec Canada described instruction program overcome beginners natural tendency turn left program coincided almost exactly decided obviously correct Seriously does work So slightly-edited version Rays technique Tell student cannot move feet just like concrete after takeoff once has sumed pilot position Start off flying natural horizontal Figure 8 Figure 1 fly until three four exactly same groove fly reversed Figure 8 will have quite length time reversed control application opposed regular 8 Fly until same proficiency ac quired first harder think try Procedure Turns Figures 3 4 just different 8s wish require attention will see fast can get disoriented comes reverse controlapplication level plane comes traffic pattern insist rectangular Otherwise pilots will end up some sort triangle gets final turn line up runway gets trouble turn 90 plane usually starts dive spiral Pilots should practice right-hand traffic/landing patterns since usually home left-hand approach Rays method does work believe big part reason its success student concentrating what hes supposed make airplane hes supposed emphasizes positive aspects flying results de-emphasis negative ones good example what mean found less-than-average-ability pilot de cided build Quickie 500 racer join monthly club races somewhat apprehensive about having him join us didnt make us feel better could barely land airplane first test flights decided coach him flying pylons What didnt know wanted close transmitter case got trouble After couple practice race sessions really started concentrating making good pylon turns make long story shorter did well con fidence soared could almost visual ize light going head Suddenly landings no problem him Hows song go Accentuate posi tive orks future columns Ill include sug gestions learning fly now want emphasize beginners should look help early ask questions theres no such thing dumb question listen experts never fly alone until instructor says its okay Ron Van Puue 111 Sleepy Oaks Rd Ft Walton Beach FL 32548 RC Soaring/Pruss Continued aae 47 current version Dohle eyes arent tricking After finetunes design rules whether its de signing yachts race cars Sailplanes bound something common among winning designs aesthetics usually signature designer trick stuff isnt apparent Synergy full trick stuff linkages Controls rudder elevator ailerons flaps latter two can mixed work jointly affect camber changes can also controlled independently other recent breakthrough airfoil design using 150 Model Aviation
Edition: Model Aviation - 1984/06
Page Numbers: 40, 41, 42, 146, 147, 150
i PRESENTED HERE computer program BASIC languageeasy use home computersto help design canard aircraft program simple will provide useful tool design work will also fun exercise youre learning use computer same time hobby use computers growing rapidly cost home com puters seems coming down just rapidly Judging local RC club mod elers getting computers theyre readily available now extent programs like can practical use ful Weve seen club newsletters heard discussions modelers already using computers hobby prob ably predominantely RC Soaringfor air foil analysis performance prediction wind tunnel data interpretation etc expect see computer programs presented model magazines future early stage starting off exciting direction use computers various programs can help advancement I{ C4t tt 1 44 C RC aeromodeling got involved effort during design Firebolt canard RC model fea tured issue mystery design ing canard determining location balance point size vertical fin area modelers design trial error procedure basing new design known successful past aircraft chang ing some dimensions see what happens can done successfully canard few existing aircraft use reference OOOOOOOOOOOOOOooooooooooooooOOOOOOOoOOooooooooooooooooc In* * 1 I-L** 1002 10** ItInII01* * rz- ** 0InIn0** 0002 1514 * * KIn 024W** 01 ILl 02** .In1-InIn10** 013 1302II* 01540100- * * tWIn- 02** 002In0It11** 3In IS * * 0000000 01 0- 0 5002 10 4 I-021-10In CIn 02 02In4 0DIn 115 InI-ItInO01 021 In00150-SI In020010 1 020 1-0 4WIn002 11 401002-Ol 34InIn0It21 ow In02 InIn4 0-InInC 02 0200-21 In00 210 15151'02ItIn 1110 01-cIInO0 0 1JInInIn0 0112-0-02ItIn10 02 r 0 InI 0201-1- 4In 00 021In021013 1InS I-In0 InOIn 150 0 InIn1In In 0 15120002 LOInII 0 0 15 ItIt.021In0 02 0In In 0- 15 03 0 020 InTh02100210- 4 0Z 1302 K15000In'1- 0001 010 1 0It 15 02 InIn3In 024In C 0It 0 415112InIn 0-15 0215 C In02 1- C 4 .2In1-InIn02In 1 C3 In15 02 002WInLI' 2102 1 02 0 1 0In 020313 15 002 0-In 2- 02020- I0200l 0202 InIn 015100- 0 -0*- 12 15 01-1 1 wa01Z ItOIn 102 InOIn 0 o 0 02 0 In.InInIn 02020 1 10-10 1502 nIt*In02W10It115 *-In 40 1 a01315010-15-J 11J 13 1310 1-o10- 1302 02112002 I- 1 1In InIn 21 -In02- COZInO 02-In- 0010151015 0 It02It0In0-02300 ,151-F-02In3154102002In0 02 1 1 -41 1 1515In02150215 1- F- 15 15 15 15 02115151515151515 2115151151It13It13It21It21It21It210 02 010 11111110- It02It02It0ItCOIt0 0- 114 InCInInIn In1111l 15 -InInInInInInInItItItTh 0-0-1010100- 0 02 InIn00-0-0-0-0-0-0-0 InInIn0SInS00InInInInInInIn00 15 InInInInIn0InInInIn.0111In1flOI-0201In-10111In11210110[v32][b24173012111425600]] .1J020211110120 11110C111140111111411JIJ0 11IFI\02 0 000000000 000 0000 00000000000000000000000000000c 40 Model Aviation K- 0 0 0 0 0 D D D Assist RC Canard Aircraft Design Home computers becoming more widespread perhaps time article computer can used modeling pur poses computer program printed using Ron Van Puttes formulas useful designing canards conventional air craft too U Dick Sarpolus Bernie Raad Aerodynamic formulas available sist us dont have aerodynamic engineers use Ron Van Putte writes MAs Sport Aerobatics column provides few additional answers balance point must move forward stab included several basic formulas necessary use area decreased balance point will canard design June 1980 column big advantage having computer move rear other variations can formulas provide center mass calculations ease performing considered working up new design balance point location canard number design variations variations can run through caldesign also indicate vertical fin work finalize new airplane culations until settle final airarea design sufficient course example looking canard design frame configuration desired computer program necessary wing swept-back further balance point recommend look Van use formulas program must move back As horizontal stabilizer Puttes June 1980 column complete makes easier faster get answers moved forward away wing explanation formulas along 00000000000000000000000000000000000000000000000000000 CFhi - C UAC LA CA U Fr Cd FCF-C0. FrCAFr 0I 000 CCC U ICEFr2 FrF- Fr IF0 F-F- Fr2 ILASCUW 4U CCZFCUFrO ZUC Fr0.rFrFr FrFLUCLLJ0I40LU 0OFLOF-00 CA I0LU 00W00 AAF- IF UOFFF F--FCLCAlFFrU FFOFrOCILFrO0 00- -FFF0JF0CFrFUFrOFF0 UFL U FrC C 0 0 FrFr FF CA FtCCF FCC0AJFr4UhF-C CF0 F- 0CF0FFFF0FAF Fr010 F-C-U 0NOFF L Fr CJ CCC F - IF FF CLA F\F CFFFr00 U 0 0 0U C Fr Fr-0Cli FFrFF000F-F IF 1-C FrI r-F- 1-FFr 0U 0 0 F-\N C- 0 IC.C1EUW EU U U 0F- COCCI-CCI CCI CCI CCIF FF0 FOILF 0 OF-LCE 11-lU LOll Fr CU C-C-XE CC Fr 0 CFACOFF ULL0.CU F-0N 0**CSO * CA NC 0 0FLFFOFFrF- UFr F FrOFrOC04F -Fr ACOF- OUFAW WA FrCAl C FLU U Fr F-F-COCOOCI CO CF 000 CI 0*Fr IF- F0000F- F uZCC UFrFI~ OCLUS FrS Ot- 0 0 F-UC F-NNCO* F- .A CA Cl0FF-FA0U EUE 0U UW Fr F- U 0 CO 0 CC-CO.CO COCOCO CAN U CA CA CA F 0F-U 0 F 0 F- 0FJFrFE Fr FrU IL0UUWZUFr Fr NF4F- 00 WF-FU0 0UFrFr U U 0. 4 Fr* * -CU*U W COCAAC 00 OOFA F FrC0FrFr 01 EU UFrF-0FrF-F- O EF- F- Fr 0101010 COFO0I0. U F C-FflE C- COW F N CICO F F-FrEE Fr F F-O-WW F-U C F-I0E'UCFr0 CE Fr F-Fr FL FL Fr Fr F- CC F- LA 00 FF-N NF-0 F-N00F-0J FrN 1 -C-ECO- 00 Fr F O-U OF OFrF-I4 CC- F C-COF-FLFL0IF-WFLCO F-U NON UCO 1 lUCO-CFFr ..C.FrO +-N* *-N CO*FC** *GF-LAIIJOJ S0NI-ACA FrFr ZFI-CCA4 1FF-C C C C NC C -C -C C C C 0S0S0S0F-400.4W00.4FSUWAJNNNF-F-CONFFONF-NOCOOOCO[v32][b11642871161624410]]NNFLO1 NI- * F-F- C C C C C C C C C IF IF CIC CC C C C C C NNC-CA+ FFCC+NNN IF NXNCO*A 1100*CO-F-F-F-F-F-OF-F-OF- F-F-F-F-F-F-F-F- FI-F-FF- F-CO F- F- F- F- F- F- F-F-F-tENONNCOCOCOCOCOCOCOCOFIFACO CAIFUF-F-F-F-F- F-F-F-F-ZZCCXAZOZZZCZZ OCLOCLOCLOCLOCLOCLOCLfl0O0O0fl00000000UU0Fr0U[v32][b13262913181924790]]S0*ISCC*S0 *ZZZZZZZZZZZZFr 000A0CO0CA0AA0A0CA0A0I00100IF FF1111 FF1111 FF1111 FF1111 1111FF 110FF 41111 F-4FF 0FrFrFrFrFrFLFrOFLFrCFrFr0FrFrFrFrFrCaFr0O Fr'Fr FLFrFrFrFrFrFrZZFr0COCO N COFLCOCOCOCOCO0CO FF0011 OCOFLO 110011 CC FrFrFrFrFrFrFrFrFrFrOFrFrFrCLCLCLFL0FLFLFL0000000FL0[v32][b22192938131624990]]000 00WW0F-OE EACXULAEC0CACO0hThL0-J~0FLCLCLFLCLCLCLCLCLFLFLFLFLCLQQQQ000QQQQ000Q0Q0Q6 0CC 0e0w&w&N00000000NNS0000GQO00S r COCOt0100000NCOFr0CONA0FCOCO*FICON0OFO NCOtN0O0COCOtN0O0N0t0C0N00COCOtCCCCOF-0O000OOOOOO CC- 000 COCOCOCOCOCOCOCOtttttttttt0VIUUU0U1fl0010 F010 010 NNF-NNNl-NFC-F--00000000000C AFOCOCOC-IFC 00000000000000000000000000000000000000000000000000000 June 1984 41 Lance Schneider seated Apple lie home computer flash picture doesnt show computer display screen program presented article cant help wonder ing whether computers will become standard equipment future modelers workshops Ron Van finding proper cen consideration Ia dynamic center wir cookbook technique best rye found X Also calculate S vs use Next aerodyn zontal stabilizer de way using Figure 1 responding 8 thIs time being will note no rr far ca sidered fact will have two ted mess calculation corre conventional cam drnor between ta minus sign another term ermine distani centers er locate wn Figure 2 enter mass loc Jrcraft will statk test flights have able move ce er airplane response e second part gn providE v canard airc put vertical fins wings rather n fusel xlynamic ce, calculated vertical fin 3wi11 tell II Lilt size V about ec od shape its greater i4 SOS WING loops TAIL CG ---0-H small Convers rticaJ fins t04 rtical fin arE wr calculation nag about es N mmave Sri V 0000000000000000000000000oo J001 00mCr 00-0in0$ m 0 Cr -Jin inLCr 11WI- 15-J 0SCr in15 00 U-w 1'5 0 S .inC inn0 -Ja-cowo 00 00000 -0 0 a-u O -Cr wOlaw a-wmazm 00 rmm-ma-0 moocc0 0 Lo 0zZOOWC0Cr0 0\0100 0 5inc 0-0141-1j-Z 00000 IIin'0 1 0sO -00a-0~a-0Cr- CrCr' 4mCr0 0 0 Ca-0 '0 0w 00100-00 NJ *00 -J 5CrCa-.0 0 a-C CU0000Cr Cr 0 0000CrCr0m0J0 o Cr100-1f-r-OW0111 O 01-1 N--0 0-0 00aCII 0in-JLtJJNJ0Cr 111Z*J a-0 0000-ZrWaCi-'0CrCr00Z100 inc 0 Oil I- -JinXCrCr -LU01jJt5 Cr 011 Cr0 ---0 I-Cr 0 000151505-JO-Cr hin NI -0'-ZCrZ0--0 Il0O-01-J0a- 0--Cr000a-0 C a- IIlCr000 0 Cr00WOO000OW00 a-0 W Oh '019WCr010400CrCr-Cr40005 * * Cr J0 ciW3-.Cr0 cc1-0 0 00 00 00-Crc0- 0jJWin OCr00 CWJzJ00-0W ----- 00 1-a--0 55bLCrCrWCr015-ini-Cr0015-0W\N N\550 * 111001-1--Zn-000innCr5000 -.- 00000 000001-0in-01--WCr0Cr--000- Cr 000000 -4000 05W0 CrCr01-1-- Cr5Cr505S005in-1 **0**0flJmooIICrIfl--0 5 N 0 -- -is Cr00U-tinNCr 0 0 II-00'0* 00.WON CrCrI a-j 0 nn UIU 1-E.Cr0 000000 a- 00 000 a- 000 a-- 000001 *0000 a- 00 a- 00000OC a-mo * o a- * 0 * 0001- - a- a- a- a- -a-a-a-a-a-a- -a-a--- a-a-a-a-a-u a- a- a- a- a- a- - -0 a- 00 a- a- -Cr OCr -J -0000 a-a-a- 010 1101010101 C 0 0101 C Ott 0 t 0 0 0 0 t t 10100 U U U U 00100000000000 N N N N 1-N N N 00000000000000000000000000000000000 output data program provides surface areas wing horizontal stabilizer vertical fin fins aerodynamic centers surfaces lo cated balance point range given relation leading edge wing used formulas provided Van Nile computer add bal ance point location provide range Firebolt flown balance point extremes range program will also suggest balance point location airplane conventional configuration further information wing loading given have seen references indicating since canard surface also lifts wing does better wing loading calculation Continued page 146 42 Model Aviation drawings provided although thats necessary use program Edi tor readers convenience appro priate portions column reprinted herewith LEOS LASER * World Aerobatic Champion lop Quality Epoxy Glass Fuse loge Cowl & Wheel Pent /4 Aluminum Landing Gear Foam Wing90 Spun Wing Area 1440 sq inches Complete Step Step Solon Finish Kit structions Pictures Weight 16-20 lbs Engine 2-4 HP 9995 PLU S $1 * SHIPPING Direct-Sales Only ROUSH MFG JR3 STICK Ideal Trainer Ax Ontstnnding Relsa & Fosm Kit 72 Wing Spun wing Ares-liSt sq 12 5, Assembly Time weight t -12 lbs Engine Sixe 75 1 3 95 $7 9 PLUS SHIPPING Direct Sales Only COMING SOON Turbo BD Trainer 40&25 sizes Manufacturers Quality Kits Large Scale Engines GLOW lireb PLUGS NEW IMPROVED High Performance Glow Element e Blow Proof Seal o Six Types 3 Heat Ranges o Longer Life Only $129 Swanson Associates PO Box 151Since 7948 NJA Wayne 07470 TO ORDERSend $1200 plux $150 Shipping Packaging Charges ICalit Rasidents Add 6/s%SnlnsTax Hal Payne Enterprises 1843 W Torrance Blvd Torrance CA 90501 213 320-3068 Address Radio Technique/Myers Continued page 143 two receptacles RUDDER AUX Collective servo plugs GEAR receptacle sounds confusing have once Read instruction manual its English Airtronics gyro resembles Circus gyro its setup its actions see photo system arrived 94554 servos zero-slop ball-bearing isolated potentiometer coreless-motor high-torque waterproof servos Because Helicopters seem eat servos Ive encountered failures little hour service seven 10 hours first failure nor mal some folks will argue plainbearing isolated-potentiometer standardmotor servo sensible choice Such plain servos usually have some degree gear slop Experienced chopper pilots will tell tighter stronger quicker precise control system better will fly No argument about Most Helicopter troubles come sloppy controls bad adjustments So pays money takes choice might choose fly cheaper servos until youve got everything under control put expensive servos advanced training will need advantages real precision wish quantitative way assess good/bad Helicopter servo installations So far just use rubber appliances come servo screw down metal eyelets place avoid crushing rubber youve proven theres better way Id really like hear about believe cant prove pushrods should short stiff possible links should fit bellcranks servo wheels etc snug fit pos sible vibration standpoint ar rowshaft pushrod should better bicycle spoke use lot spokes just because Im lazy next guy main reason seeking another radio desire try inverted flying Wankel-powered Baron 20 Sure could easily put invert switch Apollo Im obeying wise old sage once said Dont mess around working system Last years OS 28H/Apollo/Kraft gyro/5R900 packlAce Silver SevenIKPS-24-equipped Baron 20 camera its back doing just fine Im leaving alone Ive long idea Wankel could natural Baron 20 way installation works out carburetor crankcase pressure fittings fall right Barons fuel tank centerline should ideal kinds flying Wankel offers better power/weight ratio reciprocating 28 less vibration runs faster led sunnise tht might spin main rotor faster never have tained 1300 1500 rpm manual says correct machine Spinning main rotor faster might permit flight smaller main-rotor pitch angle reversing pitch inverted flying should require less rework right So what happened Tune next month find out George M Myers 70 Froehlich Farm Rd Hicksville NY 11801 Computer/Sarpolus-Raad Continued page 42 would include canard area also program gives both answers engine loading pounds per cubic inch engine displacement added program interest shows sort calculations computer can easily vertical fin area analyzed according formula program advises area needed design contains excess area Firebolt design has excessive fin area flies well Explanation description pro gram program developed using Hewlett-Packard Model 9830 mini-computer consequently written HP BASIC version BASIC very similar variations language now used innumerable home computers program consists Display Input Computation Print commands 146 Model Aviation Canton OH 44707 Phone 216 484-6810 484-4374 TUNED PIPE CONNEC TOR $1200 Pat Appi aluminum sealed silicon 0 rings Easy install Simply insert header pipe tighten end caps - More Blowouta e No Unsightly Ties No Lost PIpes oniy inlng ever wear out lea 50 0 ring extra 0 rIng Included e SatIsfactIon Money Back Guaranteed Thin return uhlppleg label t LegIbly EBERLES IS YOUR HEADQUARTERS FOR HEHCOPTERS EBELE5 COMPLETE LINE OF HELICOPTERS PARTS & ACCESSORIES mm o COMPETiTOR PRO Fully aerobatic collective pitch plus new added bearings PROmodelwithENYA6OX. 43995 OS61FSR. 44995 ENYA chrome heli46995 OS 61FSRH heli46995 O ANNOUNCING ThE AVAILABILITY OF KAEr HEUCOFERS___ BARON 20-collective pitch. 18995 BARON SOA MARK Il rotation collective pitch .. 29995 BARON 502 om collective pitch36795 BARON 50- ustom Blackhead MK B46195 o CUSTOM HEU-BOY collective pitch automatic tail rotor compensation & aerobic kit ENYA 60X34995 OS 61FSR35995 ENYA chrome heli37995 OS 61FSRH heli37995 EJ SUPER MINI-BOY collective pitch autorotation tail ro tor compensation&aerobic kit ENYA 4OCX28495 ENYA 45CX29495 OS 4OFSR28995 OS 45F5R29995 o HEUCOPTER& ENGINE OMBO ENYA 60X OS 61FSR HP 61 old Cup ENYA 60X hell OS 61FSR sell Some engines limited please order soon Call pral sg O RADIOS Airtronics Fut iba JR & Kraft AIRTRONICS 6 channel hell standard254% JR Century seven 4501 servos25495 Send $2 complete catalog Z ORDERING INFORMATION ALL ORDERS SHIPPED DMLY UPSt~J 0-$25 add 350 $26$lOOadd4 505101 over add6 00 BLUE LABEL- held 30 days Pennsylvania Residents add 6% sales tax add 10% merchandise total COD charge $165 Payment Eberles simply take order will endeavor awer COD orders cash money order certified check fast service please question may have will assist recommending xight lp#&fr send certified check money order use credit card Personal checks wili particular needs along prompt service equals trouble free 0*w We Sell Helicopters & Fly Wel Co-Pilot Everytime Fly IRCEiS ~Phone 412 &9766 9- PM 586-7768CfWg-# 672 PITTSBURGH RD BUTLER PA 16001 own use machines cannot handle lines 80 characters special care taken keep computation lines shorter 32 characters Input Output statements can shortened split ting two lines should present no problem budding pro grammer As presented program occupies little less five kilobytes memory means can handled com puters little 8K RAM Most special features peculiar HP left out order make program uni versal introduction over well get down business perpendicular fuselage value zero no sweep leading edge swept-back value positive leading edge swept-forward value negative 6 B5 Total span horizontal stabilizer inches 7 R2 Stabilizer root chord similar 3 8 T2 Stabilizer tip chord similar 4 9 D2 Stabilizer leading edge sweep similar 5 10 V2 Number vertical fins vertical fins positioning have no effect balance point location input useful canard designs stability affected fin characteris tics Therefore dealing con ventional design wing ahead stab assign zero value program will skip inputs 11 15 11 133 Vertical fin height inches 12 R3 Fin root chord similar 3 7 13 T3 Fin tip chord similar 4 8 14 D3 Fin leading edge sweep similar 5 9 15 L3 Fin offset wing leading edge inches dimension locates leading edge vertical fin respect wing leading edge root 16 C Enter 2 canard 1 conContinued page 150 Input lines 90 530 order run program get results will need 19 pieces information explained follows 1 CS Model Designation 30-char acter field has provided identify design being analyzed field includes blanks can occupied letters nu merals symbols combination three Should need larger field sure redimension C$ line 10 2 134 Total wingspan inches 3 Rl Wing root chord inches Dis tance between leading edge trailing edge measured wing center 4 Tl Wing tip chord inches 5 Dl Leading edge sweep inches Distance tip relative root resulting leading edge sweep leading edge COMPLETE THIS FORM AND ATTACH MAILING LABEL FROM RECENT ISSuE LET US KNOW WHERE YOU ARE GOING move please let us know advancesix weeks requIred change address Attach current MA mailing label check appropriate box mail Subscrip tion Dept Model Aviation 1810 Samuel Morse Dr Reston VA 22090 Check appropriate boxenclose payment 0 NEW SUBSCRIPTION Efl CHANGE OF AGORESS Non-AMA subscription rates $1800 12 months US possessions elsewhere inciuding Canada Mexico $2400 US Schools $900 US Libraries $1350 NAME ADDRESS CITY/STATE ____________________________________________ ZIP _______________ MODEL AVIATION 1810 SAMUEL MORSE DR RESTON VA 22090 June 1984 147 REBEL a/c 861 1mm RoadSan Antonio TX 78216 512 341-6712 FUTABA 7FGKFM20995 6FGK FMSOLDOUT 7FGK18495 6FGK16495 SFGK15495 6FG15495 4FG14395 4L3-S/2810495 2F2/S-28-R4H7495 S-28SERVO1895 S-32SERVO2595 COVERINGS Momokote Opaque 3 Rolls1695 Monokole Trans 3 Rolls1695 Monokole Met. 3 Rolls2095 CYANOACRYLATE Hot Stuff MS-I e149 Hot Stuff HSTl e149 Hot Stuff HS4 2 Ounce499 Hot Stuff HST-4 2 Ounce499 Hot Shot245 Jet e179 Super Jet e179 Jet 2 Ounce599 Super Jet 2 Ounce599 EPOXY GLUE Deveon 30 Minute 9 Ounce595 Deveon 5 Minute 9 Ounce595 Hobbypoxy 8 Ounce359 Hobbypoxy IV 8 Ounce559 Hobbypoxy 1118 Ounce295 SULLIVAN MT #600 Starter2595 HID #601 Stance2695 HTI-24 #602 Starter3695 PLEASE NOTE Prices subject change manufacturers prices change Alt Items subject availability time sale Prices effect until next Model Aviation Issue Show room prices may slightly higher Visit show room San Antonio 100 discount price list refunded first order Shipping& Handling Prepald orders S390 COD Credit Card orders S595 Overseas orders add estimated shipping 25% deposit re4nired first lime COD 55% sales tax required Texas residents Personal checks detay shipping IS days Coming Soon ~ 1/5 SCALE RIO MODEL 62 SPAN NGINE CHANNEL R/C FOR ADVANCE INFO WRITE TO ST CROIX OF PARK FALLS LTD PO Box 2790 Park Falls WI 54552 Computer/Sarpolus-Raad Continued paqe 147 ventional configuration 17 Li Distance between stabilizer wing root inches length fuselage between wing stab 18 Wi Total weight ounces i9 E9 Engine size cubic inches structure program such prompt value of pa rameters listed above have enter particular value gets stored memory until used sub sequently Compute lines 540 850 Assuming input sequence performed correctly program performs com putations needed between lines 540 850 computations involve finding aero dynamic centers surfaces surface areas area moments balance point center gravity location wing loading en gine loading Output lines 860 1760 Lines 860 1760 mostly comprise PRINT routine output subdivided three parts Part IIdentifies program its function Part IlPrints out input parameters allows double-check input data Part IllPrints out findings programs neat format part labeled Output Data can seen sample printout included article summation story behind computer program usable assist de sign canard RC aircraft hope interest help Happy com puting RC Aerobatics/Van Putte Continued oaoe 45 has end sometime letter mentioned receiving earlier Ray Gareau Ville de Laval Que bec Canada described instruction program overcome beginners natural tendency turn left program coincided almost exactly decided obviously correct Seriously does work So slightly-edited version Rays technique Tell student cannot move feet just like concrete after takeoff once has sumed pilot position Start off flying natural horizontal Figure 8 Figure 1 fly until three four exactly same groove fly reversed Figure 8 will have quite length time reversed control application opposed regular 8 Fly until same proficiency ac quired first harder think try Procedure Turns Figures 3 4 just different 8s wish require attention will see fast can get disoriented comes reverse controlapplication level plane comes traffic pattern insist rectangular Otherwise pilots will end up some sort triangle gets final turn line up runway gets trouble turn 90 plane usually starts dive spiral Pilots should practice right-hand traffic/landing patterns since usually home left-hand approach Rays method does work believe big part reason its success student concentrating what hes supposed make airplane hes supposed emphasizes positive aspects flying results de-emphasis negative ones good example what mean found less-than-average-ability pilot de cided build Quickie 500 racer join monthly club races somewhat apprehensive about having him join us didnt make us feel better could barely land airplane first test flights decided coach him flying pylons What didnt know wanted close transmitter case got trouble After couple practice race sessions really started concentrating making good pylon turns make long story shorter did well con fidence soared could almost visual ize light going head Suddenly landings no problem him Hows song go Accentuate posi tive orks future columns Ill include sug gestions learning fly now want emphasize beginners should look help early ask questions theres no such thing dumb question listen experts never fly alone until instructor says its okay Ron Van Puue 111 Sleepy Oaks Rd Ft Walton Beach FL 32548 RC Soaring/Pruss Continued aae 47 current version Dohle eyes arent tricking After finetunes design rules whether its de signing yachts race cars Sailplanes bound something common among winning designs aesthetics usually signature designer trick stuff isnt apparent Synergy full trick stuff linkages Controls rudder elevator ailerons flaps latter two can mixed work jointly affect camber changes can also controlled independently other recent breakthrough airfoil design using 150 Model Aviation