rp ~itiii Soaring Dan Pruss GADGETS ideas should make life simpler workshop flying field months subject before get youve got hear what Madison Area Radio Con trol Society MARCS did first week November 1985 week end third annual RC symposium event just gets better year As past topics ranged high-tech presentations low-key discussions something everyone Introduction Aerodynamics HINERS AUDIO AMPLIFIER gv Sw presented Frank Baker Meteor ology Soaring Professor Roland Stull both gentlemen University Wisconsin Ken Bates entertained strong emphasis entertained 90-some folks first day lecture fly ing wings Any club Ann Arbor MI 6 Subminiature Plug5/ 2LM386 ReceiverlOKfl220 mfd BA Speaker 9v Jack Hiner built audio amp could use loudspeaker Thermal Sniffler circuit Radio Shacks Engineers Mini-Notebook Op Amps parts list end Dans column month area would well getting Ken club meetings comes complete slides sketches witty anecdotes Five cross-country experts Pat Flynn Noal Rossow Ken Bates Stan Watson Mark Stidhem discussed aspects cross-country flying cluded preparation tasks aircraft chase vehicles discussion cen tered around aircraft design construc tion techniques phases talk V 2 IN 3 IN 4 GND LM386 7 6 5 ouT Heres what pins LM386 inte grated circuit used 46 Model Aviation Mock-up built Scott Christensen demonstrate Gregg Seydels fine Idea improv ing fling-stab mounts Pivot left uses small squares circuit board material glued fin structure pivot-wire hole drilled number-drill no-slop fit Randy Culbertson shows ott 0 hIs low-aspect-ratIo designs lum Searcher 100 spans 100 has 75-to-one aspect ratio FX60-100 airfoil Wing area 181325 Sq Two-Meter version has 56-to Leon Kincaid has nifty way close gaps between wing roots fuse lage Scheme explained column 0 ssed safety Jack Hiner world record-holder Distance Altitude gave history variometers thermal sensors current use later about vario meter modification Jack has made Bob Sealy lectured fiberglass work presented line fuselages pro ducing examples craftsman ship its best Wayne Custer like manner showed Super Wings foam-core wings best tradition type construction Michael Selig rated top model-airfoil designer country fered opinions theories airfoil shapes youre getting feeling symposium leaned computeraided side modeling also slide presentation Fifth F3B World Championships Australia also Terry Edmonds gent fin ished first second third categories 1985 AMA Nats Continued page 131 Everyone stood up saluted Bob Sealys fine workmanshIp seen third annual MARCS symposium Piane Gemini bare fuselage example Bobs fine fiberglass work ASmAI WE ARE SHOOTING DOWN HIGH BALSA PRICES WITH SUPER QUALITYI Satisfaction Guaranteed Direct Only BALSA SN EETS 36 48 1/16233 3/32240 1/8 243 3/16248 1/4 256 1/33337 1/20337 1/163374831 3/323445837 1/8 3547146 3/163628255 1/4 3730661 5/16385 3/8 38812471 1/2 e3110155 3/4 3165 1/164587648 3/324709456 1/8 48010686 3/1648312275 1/4 411013484 3/8 225 1/2 4225261 MATCHED SHEETS 43 3/324100 1/84108 3/164120 1/44131 30, BALSA SliCKS 1/16 1/4 1/16 3/8 1/16 1/2 3/32 1/4 3/32 3/8 3/32 1/2 1/8 1/8 1/8 1/4 1/8 3/8 1/8 1/2 3/183/16 3/18 3/8 3/18 1/2 1/4 1/4 1/4 3/8 1/4 1/2 1/4 3/4 1/41 5/18 5/16 3/8 3/8 3/8 1/2 3/8 3/4 2/81 1/2 1/2 1/2 3/4 1/21 5/8 5/8 3/4 3/4 3648 09 10 14 10 12 16 08 1116 1218 1824 1116 17 2230 1624 1926 2130 3444 40 2126 2737 3246 4255 52 3653 4662 56 46 67 BALSA HOT LINE Ciii 806 745-6394 10 am -6pm Central lime LONE STAR MODELS 1623 57th St Lubbock TX 79412 WOOD 1/323 1/203 1/163 3/323 1/83 3/163 1/43 3/83 1/23 3/43 13 1/164 3/324 1/84 3/164 1/44 3/84 1/24 1W BALSA TRIANGLES 36 4425 383830 2235 343445 55 BALSA PLANKS 36 85 250 3200 4280 11/23276 11/24360 22225 23325 24435 33495 34658 TAPERED SHEETS36 1/42 65TRAILING EDGE36 1/43 851/4132 3/82 685/1611/439 3/83 983/811/246 1/231201/2270 LONE STAR EPOXY 9,L,1-835 5 ri598 15,,556 30 ne598 INS TAN CL UE 1 k 208 1 , Thi 208 2o Thick 500 2, Thie 500 CUSTOM CUT CONTEST BALSA Sheets Piece ed Close Tolerances AAA Grade Dried ped 100% serious modeler want performance BASSWOOD 3/16 3/16 3/161/4 3/163/8 3/16 1/2 3/163/4 1/4 1/4 1/43/8 1/4 3/4 3/8 3/8 3/81/2 3/8 3/4 1/2 1/2 1/23/4 must try 4-6 lb balsa 48 26 20 38 46 80 42 49 80 00 70 80 80 108 BUNDLE DEALS 201/6336685 201/164361020 20-3/32 336840 153/32436955 15-1/8336715 10-1/5436675 15-3/16336000 10-3/16436810 10-1/4336630 151/4436880 103/8336800 0-3/8436625 0-1/2336540 5-1/2436855 103/32448845 0-1/8448485 5-3/16448585 5-1/4449625 PINESTICKS 36 48 / HARD MAPLE 1/81/813171/43/8 1/81/416233/83/8 1/03/820273/81/2 3163/1617243/83/4 3/163/823321/23/4 3/161/23040 1/41/42637 14 3/83042I 1/41/23447 3/0 3/83762 SPRUCE SliCKS 36 48 1/8 1/815 1/8 1/41624 1/8 3/82029 3/163/162534 1/4 1/43145 1/4 3/83650 3/8 3/84563 3/6 1/25570 t/2 1/28080 1/2 3/448 88 SPRUCE TRIANGLES 3/83/6 1/2 1/2 3/43/4 BIRCH DO WELS 1/8 3/16 1/4 5/16 3/8 IS 40 46 50 08 68 36 09 11 14 20 32 3PLVBIRCH48 1/6412025 1/3212425 1/1612435 1/012450 SPLVBIRCH48 3/3212570 1/812585 363/1612585 401/412600 61 77 GROOVED LG MOUNTS LITEPLY 48 1/86154 1/812300 13 Inches 3/83/4/1/8/40 3/83/4/5/32/00 1/23/4/3/16/45 Handling Charge$30O pay UPS Add $200 COD $300 extra PP APO FPO accept Visa MasterCard personal checks COD 4-1/8% las Teas US currency 017 Minimam Order 01000 Sem LiGHT 4-6 LB 36 49 49 49 56 67 76 85 115 120 220 308 70 91 108 117 138 207 282 March 1986 47 Bob eaiy likes use thickernian-normai rib materialmakes up adding plenty lightening holes Hope covers transparent materla lilts lovely Photo Bob Sealy Jack Hiners boom box auuuouon Ace R/C Thermal Snifflers monitor Matched Performance System TOP PERFORMANCE K&B ENGINES AirplaneMarine K&B FUELSK&B GLOW PLUGS B Blends4 Cheices Matched Finish System BEST APPEARANCE K&B FIBERGLASS CLOTH K&B Micro-Balloons FILLER K&B SUPER POXY RESIN K&B SUPER FOXY THINNER K&B SUPER POXY PRIMER K&B SUPER POXY PAINT K&B MIXING CUPS sion centered third-order intermodula tion interference 31M considered test data presented George Steiner receivers Bill Hershberger transmit ters team Myers Aberle field tests both transmitters receivers have already seen Aberle/Myers data Radio Tech nique January February 1986 Flying Models magazine take Subsequent Frequency Commit tee meeting Bob Aberle went back field examine second-order product interference 20P question closely some thought passed off too easily Well can now report based much de tailed elaborate set tests find current crop receivers both AM FM single- dual-conversion have designed very nicely resist 20P less problem adjacent-channel interference 20 kHz raster far less important 31M George M Myers 70 Froehlich Farm Rd Hicksville NY 11801 RC Soaring/Pruss Continued page 47 along Gregg Seydel Scott Christ ensen Top Flite Models offered tricks trade under topic Contest Strategies Along above swap session socializingWisconsin style table clinics socializingWis consin style bull sessions socializ ingWisconsin style cost $15and included buffet lunch Saturday made contest cir cuit banquets look like Lenten fast days So can see fit Madison next Novembers first weekend can sure youll spend finest modeling get-togethers ever Never mind about eight inches snow fell programmed Dr Walt Good didnt think just going have drive country during trek up Florida Now some gadgets Leon Kincaid excellent designer builder see Scooter plans October 1983 issue Model Aviation has clever way getting airtight fit between wing roots fuselage Its also good secur ing wing halves matter Forget about tape idea does take bit building finesse job worth doing worth doing well During wing construction besides main wing joiners alignment tubes Leon installs second set tubes just behind main wing joiner shown photo Location critical tubing diameters arent either However larger diameters tubing better Notice saying diameters because key system fact wing tube telescopes other Which wing has larger tube isnt critical either Small holes carefully drilled wing tubes elongated slightly direction wingspan After wings joined fuselage flat steel tapered pin narrow end matches drilled holes insert ed forced holes As pin forced wing halves snugged up fuselage Nice Soaring Products Thermal Sniffler has production last 15 years now being manufactured distributed Ace R/C Inc no changes fine product ever receiver offered uses ear plug monitor Snifflers signal isnt bad arrangement tran quil summer afternoon However times loudspeaker would serve better others could listen insuch during LSF long-distance tasks cross-country flying teamwork important factor Jack Hiner found need such modification cir cuit parts list presented parts list end column Gregg Seydel has come up idea stabilizing stabilizerswell driven bellcrank up vertical fin anyway usual technique use bearing made brass tubing Continued page 135 6 NYRSeEB cm MACHE THE LEADER IN COMPETITION PROPELLERS NEW THP DESIGN TAILORED HELICAL PITCH DEVELOPEDTO GIVE MAXIMUM THRUST AT 4 CYCLE ENGINE RPM ALLTHE LATEST TECHNIQUES USED ON OUR PRO SERIES 3 SEE BELOW K DIAPITCH THP 126677/,8 13677/8 14677/8 1567 16678 NEW PRO SERIES 3 NEW HIGH TECH AIRFOIL SECTION lOTO 20% INCREASE IN THRUST MPG OF SELECT HARD MAPLE WOOD WILL NOT FATIGUE LIKE SYNTHETICS FUEL PROOF HIGH LUSTER FINISH DIAPITCHPRICE 53/34 149 634149 72833456179 83344568189 8/4566/7 199 94566h77/ 199 104566/7 209 106W8W209 106EW219 114677A7A78229 115W229 IiSEW239 1167239 124W 279 125W 279 1256 279 1356 349 1458 459 1556 659 164/N989 16678 969 RC PYLON RACING SERIES 500 DIA PITCH PRICE 7SN 5/N279 8I 6/7/,7A8 299 SERIES 400C 86677/7289 9777/289 W WIDE BLADE EW EXTRA WIDE N NARROW March 1986 131 PRICE 299 379 479 689 989 RC Soaring/Pruss Continued page 131 fin wire pivot-rod inserted result floppy stabilizer because usual loose tolerance tween wire tubing Some mod elers have come up remedies include larger bearing surfaces cant done some models especially smaller ones thin airfoil sections stab Greggs fix can considered almost universal Using 034-in circuit board material simply inlays two small squares left right skins vertical fin Using index drill precisely diameter pivot rod gives stab assembly thats rigid have try believe Fiberglass fuselages can use fix scabbing circuit board pieces side fin section finished models pieces could attached outside minor shimming being done root section stabilizer common wire diameters following should help 4-in music wire use No 52 index drill drilling circuit board /2-in music wire use No 42 drill way thickness circuit board material isnt critical Bob Sealy has line fiberglass/ epoxy fuselages mentioned MARCS Symposium report work absolutely finest quality Prices range $25 Two-Meter Stand ard-class sizes $70 cross-coun try/Unlimited-class fuselages line also includes some glass versions wellknown kit designs detailed catalog sheet send SASE Robert Sealy 521 96th Lane NE Blame MN 55434 phone 612 780-2737 following wont revolutionize RC Soaring did ever want use thicker rib material say A2-in balsa stead /16 didnt want weight penalty Well Sealy does obvious cuts lightening holes Depending rib size Sealy uses No 11 X-Acto blade plywood template smaller ribs uses brass plug-cutters says takes about five minutes per rib Now theres craftsman nothing time hands have just few ideas what some troops doing make modeling lives easier enjoyable Good lift Parts list Jack Hiners audio amplifier part description followed Radio Shack catalog number LM386 IC 2761731 10K potentiometer 27 1-335 eightohm speaker 40-1203C subminiature plug6 universal PC board 67184 220 mfd capacitor 272-956 SPST switch case assorted wire 9V battery battery connector Dan Pruss 131 F Pennington Ln Plain leld IL 60544 RC Scale/Wischers Continued page 49 Scale models wing already heavily loaded made stable adding weight First have changed longitudinal dihedral adding nose weight Down elevator trim now removed level flight Up ele vator trim substituted result down-force stabilizer-elevator combination increases rise airspeed tail depressed reduce speed nose rises speed drops off tail down-force dimin ishes raise tail positive stability formula fore-and-aft stabil ity used full-size aircraft Scale models tend decrease angular difference between wing tail incidence angles because engines weigh much less relative total plane weight full-size aircraft engine weight greater percentage total weight Decreasing angular difference leads longitudinal instability model flight tends hunt level position nose rising falling Add ing nose weight re-trimming eleva tor stops_the action model re mains level fore aft disturbed level flight will come back level its own Adding nose weight has done something extra provide lateral stability washed-out wing tips now flying positive aiigle attack doing share lifting wing tips have ceased continuous rise fall Ailerons large having excessive travel sought-after aileron author ity slow flight can have same effect warped wing Ailerons used establish steeply banked turn Recovery level flight application opposite aileron aileron low wing dropped attempt lifting side lowered aileron has great drag pulls nose down due adverse yaw pilot compensates everincreasing aileron steep turn angle attack increased point near stall Up elevator control because large portion wings lift being ex pended change direction flight rather support model Now lowered aileron acting like warped wing stall wing its aileron Stalls result excessive angle attack aileron actually modifies wing tips angle manner similar warp model snap-rolls over top spin could fatal low altitude isnt time airspace apply Down elevator recovery Several remedies available 1 Use less aileron elevator travel servo linkage 2 Learn use rudder con4$b OGA DESIGNS 44 Full Body Pilot Kit sLightest Pilot available sLifeilke vinyl la tex rubber parts Easy assemble finish eBuild either barnstormer sportsman pilot skit contains pilot head hands boots helmet cap goggles full templates easy instructions eFully positionable & moveable eSome simple sewing required WeightPrice 1/6Scale2oz$ 795 1/4 Scale4oz$ 995 lI3ScaleSoz*$1695 Weightmay vary depending material used construction DGA DESIGNS Bust Pilot Kit Weight 1/6 Scale 75 oz 1/4 Scale 1Soz 1/3 Scale 225 oz Price 595 795 $1495 sLightest bust pilot available sLifelike vinyl latex rubber parts sEasy assemble finish eBuild either barnstormer sportsman pilot Kit contains pilot head helmet cap goggles jacket instructions See dealer order direct Add $100 shipping direct orders Send $100 current catalog Dealers inquiries invited NYS Residents add 7 percent sales tax Send Check MO Allow 3 weeks check clearSorry-No COD s introducing. frebGll R/C Idle-Bar Glow Plugs Long Short Also.Only $1 69 Traditional line non-idle bar Glow Plugs Six Types 3 Heat Ranges High Performance Glow Element Blow Proof Seal Only $1 29 Swanson Associates PO Box 151 ne NJ 07470AI/Mk March 1986 135
Edition: Model Aviation - 1986/03
Page Numbers: 46, 47, 131, 135
rp ~itiii Soaring Dan Pruss GADGETS ideas should make life simpler workshop flying field months subject before get youve got hear what Madison Area Radio Con trol Society MARCS did first week November 1985 week end third annual RC symposium event just gets better year As past topics ranged high-tech presentations low-key discussions something everyone Introduction Aerodynamics HINERS AUDIO AMPLIFIER gv Sw presented Frank Baker Meteor ology Soaring Professor Roland Stull both gentlemen University Wisconsin Ken Bates entertained strong emphasis entertained 90-some folks first day lecture fly ing wings Any club Ann Arbor MI 6 Subminiature Plug5/ 2LM386 ReceiverlOKfl220 mfd BA Speaker 9v Jack Hiner built audio amp could use loudspeaker Thermal Sniffler circuit Radio Shacks Engineers Mini-Notebook Op Amps parts list end Dans column month area would well getting Ken club meetings comes complete slides sketches witty anecdotes Five cross-country experts Pat Flynn Noal Rossow Ken Bates Stan Watson Mark Stidhem discussed aspects cross-country flying cluded preparation tasks aircraft chase vehicles discussion cen tered around aircraft design construc tion techniques phases talk V 2 IN 3 IN 4 GND LM386 7 6 5 ouT Heres what pins LM386 inte grated circuit used 46 Model Aviation Mock-up built Scott Christensen demonstrate Gregg Seydels fine Idea improv ing fling-stab mounts Pivot left uses small squares circuit board material glued fin structure pivot-wire hole drilled number-drill no-slop fit Randy Culbertson shows ott 0 hIs low-aspect-ratIo designs lum Searcher 100 spans 100 has 75-to-one aspect ratio FX60-100 airfoil Wing area 181325 Sq Two-Meter version has 56-to Leon Kincaid has nifty way close gaps between wing roots fuse lage Scheme explained column 0 ssed safety Jack Hiner world record-holder Distance Altitude gave history variometers thermal sensors current use later about vario meter modification Jack has made Bob Sealy lectured fiberglass work presented line fuselages pro ducing examples craftsman ship its best Wayne Custer like manner showed Super Wings foam-core wings best tradition type construction Michael Selig rated top model-airfoil designer country fered opinions theories airfoil shapes youre getting feeling symposium leaned computeraided side modeling also slide presentation Fifth F3B World Championships Australia also Terry Edmonds gent fin ished first second third categories 1985 AMA Nats Continued page 131 Everyone stood up saluted Bob Sealys fine workmanshIp seen third annual MARCS symposium Piane Gemini bare fuselage example Bobs fine fiberglass work ASmAI WE ARE SHOOTING DOWN HIGH BALSA PRICES WITH SUPER QUALITYI Satisfaction Guaranteed Direct Only BALSA SN EETS 36 48 1/16233 3/32240 1/8 243 3/16248 1/4 256 1/33337 1/20337 1/163374831 3/323445837 1/8 3547146 3/163628255 1/4 3730661 5/16385 3/8 38812471 1/2 e3110155 3/4 3165 1/164587648 3/324709456 1/8 48010686 3/1648312275 1/4 411013484 3/8 225 1/2 4225261 MATCHED SHEETS 43 3/324100 1/84108 3/164120 1/44131 30, BALSA SliCKS 1/16 1/4 1/16 3/8 1/16 1/2 3/32 1/4 3/32 3/8 3/32 1/2 1/8 1/8 1/8 1/4 1/8 3/8 1/8 1/2 3/183/16 3/18 3/8 3/18 1/2 1/4 1/4 1/4 3/8 1/4 1/2 1/4 3/4 1/41 5/18 5/16 3/8 3/8 3/8 1/2 3/8 3/4 2/81 1/2 1/2 1/2 3/4 1/21 5/8 5/8 3/4 3/4 3648 09 10 14 10 12 16 08 1116 1218 1824 1116 17 2230 1624 1926 2130 3444 40 2126 2737 3246 4255 52 3653 4662 56 46 67 BALSA HOT LINE Ciii 806 745-6394 10 am -6pm Central lime LONE STAR MODELS 1623 57th St Lubbock TX 79412 WOOD 1/323 1/203 1/163 3/323 1/83 3/163 1/43 3/83 1/23 3/43 13 1/164 3/324 1/84 3/164 1/44 3/84 1/24 1W BALSA TRIANGLES 36 4425 383830 2235 343445 55 BALSA PLANKS 36 85 250 3200 4280 11/23276 11/24360 22225 23325 24435 33495 34658 TAPERED SHEETS36 1/42 65TRAILING EDGE36 1/43 851/4132 3/82 685/1611/439 3/83 983/811/246 1/231201/2270 LONE STAR EPOXY 9,L,1-835 5 ri598 15,,556 30 ne598 INS TAN CL UE 1 k 208 1 , Thi 208 2o Thick 500 2, Thie 500 CUSTOM CUT CONTEST BALSA Sheets Piece ed Close Tolerances AAA Grade Dried ped 100% serious modeler want performance BASSWOOD 3/16 3/16 3/161/4 3/163/8 3/16 1/2 3/163/4 1/4 1/4 1/43/8 1/4 3/4 3/8 3/8 3/81/2 3/8 3/4 1/2 1/2 1/23/4 must try 4-6 lb balsa 48 26 20 38 46 80 42 49 80 00 70 80 80 108 BUNDLE DEALS 201/6336685 201/164361020 20-3/32 336840 153/32436955 15-1/8336715 10-1/5436675 15-3/16336000 10-3/16436810 10-1/4336630 151/4436880 103/8336800 0-3/8436625 0-1/2336540 5-1/2436855 103/32448845 0-1/8448485 5-3/16448585 5-1/4449625 PINESTICKS 36 48 / HARD MAPLE 1/81/813171/43/8 1/81/416233/83/8 1/03/820273/81/2 3163/1617243/83/4 3/163/823321/23/4 3/161/23040 1/41/42637 14 3/83042I 1/41/23447 3/0 3/83762 SPRUCE SliCKS 36 48 1/8 1/815 1/8 1/41624 1/8 3/82029 3/163/162534 1/4 1/43145 1/4 3/83650 3/8 3/84563 3/6 1/25570 t/2 1/28080 1/2 3/448 88 SPRUCE TRIANGLES 3/83/6 1/2 1/2 3/43/4 BIRCH DO WELS 1/8 3/16 1/4 5/16 3/8 IS 40 46 50 08 68 36 09 11 14 20 32 3PLVBIRCH48 1/6412025 1/3212425 1/1612435 1/012450 SPLVBIRCH48 3/3212570 1/812585 363/1612585 401/412600 61 77 GROOVED LG MOUNTS LITEPLY 48 1/86154 1/812300 13 Inches 3/83/4/1/8/40 3/83/4/5/32/00 1/23/4/3/16/45 Handling Charge$30O pay UPS Add $200 COD $300 extra PP APO FPO accept Visa MasterCard personal checks COD 4-1/8% las Teas US currency 017 Minimam Order 01000 Sem LiGHT 4-6 LB 36 49 49 49 56 67 76 85 115 120 220 308 70 91 108 117 138 207 282 March 1986 47 Bob eaiy likes use thickernian-normai rib materialmakes up adding plenty lightening holes Hope covers transparent materla lilts lovely Photo Bob Sealy Jack Hiners boom box auuuouon Ace R/C Thermal Snifflers monitor Matched Performance System TOP PERFORMANCE K&B ENGINES AirplaneMarine K&B FUELSK&B GLOW PLUGS B Blends4 Cheices Matched Finish System BEST APPEARANCE K&B FIBERGLASS CLOTH K&B Micro-Balloons FILLER K&B SUPER POXY RESIN K&B SUPER FOXY THINNER K&B SUPER POXY PRIMER K&B SUPER POXY PAINT K&B MIXING CUPS sion centered third-order intermodula tion interference 31M considered test data presented George Steiner receivers Bill Hershberger transmit ters team Myers Aberle field tests both transmitters receivers have already seen Aberle/Myers data Radio Tech nique January February 1986 Flying Models magazine take Subsequent Frequency Commit tee meeting Bob Aberle went back field examine second-order product interference 20P question closely some thought passed off too easily Well can now report based much de tailed elaborate set tests find current crop receivers both AM FM single- dual-conversion have designed very nicely resist 20P less problem adjacent-channel interference 20 kHz raster far less important 31M George M Myers 70 Froehlich Farm Rd Hicksville NY 11801 RC Soaring/Pruss Continued page 47 along Gregg Seydel Scott Christ ensen Top Flite Models offered tricks trade under topic Contest Strategies Along above swap session socializingWisconsin style table clinics socializingWis consin style bull sessions socializ ingWisconsin style cost $15and included buffet lunch Saturday made contest cir cuit banquets look like Lenten fast days So can see fit Madison next Novembers first weekend can sure youll spend finest modeling get-togethers ever Never mind about eight inches snow fell programmed Dr Walt Good didnt think just going have drive country during trek up Florida Now some gadgets Leon Kincaid excellent designer builder see Scooter plans October 1983 issue Model Aviation has clever way getting airtight fit between wing roots fuselage Its also good secur ing wing halves matter Forget about tape idea does take bit building finesse job worth doing worth doing well During wing construction besides main wing joiners alignment tubes Leon installs second set tubes just behind main wing joiner shown photo Location critical tubing diameters arent either However larger diameters tubing better Notice saying diameters because key system fact wing tube telescopes other Which wing has larger tube isnt critical either Small holes carefully drilled wing tubes elongated slightly direction wingspan After wings joined fuselage flat steel tapered pin narrow end matches drilled holes insert ed forced holes As pin forced wing halves snugged up fuselage Nice Soaring Products Thermal Sniffler has production last 15 years now being manufactured distributed Ace R/C Inc no changes fine product ever receiver offered uses ear plug monitor Snifflers signal isnt bad arrangement tran quil summer afternoon However times loudspeaker would serve better others could listen insuch during LSF long-distance tasks cross-country flying teamwork important factor Jack Hiner found need such modification cir cuit parts list presented parts list end column Gregg Seydel has come up idea stabilizing stabilizerswell driven bellcrank up vertical fin anyway usual technique use bearing made brass tubing Continued page 135 6 NYRSeEB cm MACHE THE LEADER IN COMPETITION PROPELLERS NEW THP DESIGN TAILORED HELICAL PITCH DEVELOPEDTO GIVE MAXIMUM THRUST AT 4 CYCLE ENGINE RPM ALLTHE LATEST TECHNIQUES USED ON OUR PRO SERIES 3 SEE BELOW K DIAPITCH THP 126677/,8 13677/8 14677/8 1567 16678 NEW PRO SERIES 3 NEW HIGH TECH AIRFOIL SECTION lOTO 20% INCREASE IN THRUST MPG OF SELECT HARD MAPLE WOOD WILL NOT FATIGUE LIKE SYNTHETICS FUEL PROOF HIGH LUSTER FINISH DIAPITCHPRICE 53/34 149 634149 72833456179 83344568189 8/4566/7 199 94566h77/ 199 104566/7 209 106W8W209 106EW219 114677A7A78229 115W229 IiSEW239 1167239 124W 279 125W 279 1256 279 1356 349 1458 459 1556 659 164/N989 16678 969 RC PYLON RACING SERIES 500 DIA PITCH PRICE 7SN 5/N279 8I 6/7/,7A8 299 SERIES 400C 86677/7289 9777/289 W WIDE BLADE EW EXTRA WIDE N NARROW March 1986 131 PRICE 299 379 479 689 989 RC Soaring/Pruss Continued page 131 fin wire pivot-rod inserted result floppy stabilizer because usual loose tolerance tween wire tubing Some mod elers have come up remedies include larger bearing surfaces cant done some models especially smaller ones thin airfoil sections stab Greggs fix can considered almost universal Using 034-in circuit board material simply inlays two small squares left right skins vertical fin Using index drill precisely diameter pivot rod gives stab assembly thats rigid have try believe Fiberglass fuselages can use fix scabbing circuit board pieces side fin section finished models pieces could attached outside minor shimming being done root section stabilizer common wire diameters following should help 4-in music wire use No 52 index drill drilling circuit board /2-in music wire use No 42 drill way thickness circuit board material isnt critical Bob Sealy has line fiberglass/ epoxy fuselages mentioned MARCS Symposium report work absolutely finest quality Prices range $25 Two-Meter Stand ard-class sizes $70 cross-coun try/Unlimited-class fuselages line also includes some glass versions wellknown kit designs detailed catalog sheet send SASE Robert Sealy 521 96th Lane NE Blame MN 55434 phone 612 780-2737 following wont revolutionize RC Soaring did ever want use thicker rib material say A2-in balsa stead /16 didnt want weight penalty Well Sealy does obvious cuts lightening holes Depending rib size Sealy uses No 11 X-Acto blade plywood template smaller ribs uses brass plug-cutters says takes about five minutes per rib Now theres craftsman nothing time hands have just few ideas what some troops doing make modeling lives easier enjoyable Good lift Parts list Jack Hiners audio amplifier part description followed Radio Shack catalog number LM386 IC 2761731 10K potentiometer 27 1-335 eightohm speaker 40-1203C subminiature plug6 universal PC board 67184 220 mfd capacitor 272-956 SPST switch case assorted wire 9V battery battery connector Dan Pruss 131 F Pennington Ln Plain leld IL 60544 RC Scale/Wischers Continued page 49 Scale models wing already heavily loaded made stable adding weight First have changed longitudinal dihedral adding nose weight Down elevator trim now removed level flight Up ele vator trim substituted result down-force stabilizer-elevator combination increases rise airspeed tail depressed reduce speed nose rises speed drops off tail down-force dimin ishes raise tail positive stability formula fore-and-aft stabil ity used full-size aircraft Scale models tend decrease angular difference between wing tail incidence angles because engines weigh much less relative total plane weight full-size aircraft engine weight greater percentage total weight Decreasing angular difference leads longitudinal instability model flight tends hunt level position nose rising falling Add ing nose weight re-trimming eleva tor stops_the action model re mains level fore aft disturbed level flight will come back level its own Adding nose weight has done something extra provide lateral stability washed-out wing tips now flying positive aiigle attack doing share lifting wing tips have ceased continuous rise fall Ailerons large having excessive travel sought-after aileron author ity slow flight can have same effect warped wing Ailerons used establish steeply banked turn Recovery level flight application opposite aileron aileron low wing dropped attempt lifting side lowered aileron has great drag pulls nose down due adverse yaw pilot compensates everincreasing aileron steep turn angle attack increased point near stall Up elevator control because large portion wings lift being ex pended change direction flight rather support model Now lowered aileron acting like warped wing stall wing its aileron Stalls result excessive angle attack aileron actually modifies wing tips angle manner similar warp model snap-rolls over top spin could fatal low altitude isnt time airspace apply Down elevator recovery Several remedies available 1 Use less aileron elevator travel servo linkage 2 Learn use rudder con4$b OGA DESIGNS 44 Full Body Pilot Kit sLightest Pilot available sLifeilke vinyl la tex rubber parts Easy assemble finish eBuild either barnstormer sportsman pilot skit contains pilot head hands boots helmet cap goggles full templates easy instructions eFully positionable & moveable eSome simple sewing required WeightPrice 1/6Scale2oz$ 795 1/4 Scale4oz$ 995 lI3ScaleSoz*$1695 Weightmay vary depending material used construction DGA DESIGNS Bust Pilot Kit Weight 1/6 Scale 75 oz 1/4 Scale 1Soz 1/3 Scale 225 oz Price 595 795 $1495 sLightest bust pilot available sLifelike vinyl latex rubber parts sEasy assemble finish eBuild either barnstormer sportsman pilot Kit contains pilot head helmet cap goggles jacket instructions See dealer order direct Add $100 shipping direct orders Send $100 current catalog Dealers inquiries invited NYS Residents add 7 percent sales tax Send Check MO Allow 3 weeks check clearSorry-No COD s introducing. frebGll R/C Idle-Bar Glow Plugs Long Short Also.Only $1 69 Traditional line non-idle bar Glow Plugs Six Types 3 Heat Ranges High Performance Glow Element Blow Proof Seal Only $1 29 Swanson Associates PO Box 151 ne NJ 07470AI/Mk March 1986 135
Edition: Model Aviation - 1986/03
Page Numbers: 46, 47, 131, 135
rp ~itiii Soaring Dan Pruss GADGETS ideas should make life simpler workshop flying field months subject before get youve got hear what Madison Area Radio Con trol Society MARCS did first week November 1985 week end third annual RC symposium event just gets better year As past topics ranged high-tech presentations low-key discussions something everyone Introduction Aerodynamics HINERS AUDIO AMPLIFIER gv Sw presented Frank Baker Meteor ology Soaring Professor Roland Stull both gentlemen University Wisconsin Ken Bates entertained strong emphasis entertained 90-some folks first day lecture fly ing wings Any club Ann Arbor MI 6 Subminiature Plug5/ 2LM386 ReceiverlOKfl220 mfd BA Speaker 9v Jack Hiner built audio amp could use loudspeaker Thermal Sniffler circuit Radio Shacks Engineers Mini-Notebook Op Amps parts list end Dans column month area would well getting Ken club meetings comes complete slides sketches witty anecdotes Five cross-country experts Pat Flynn Noal Rossow Ken Bates Stan Watson Mark Stidhem discussed aspects cross-country flying cluded preparation tasks aircraft chase vehicles discussion cen tered around aircraft design construc tion techniques phases talk V 2 IN 3 IN 4 GND LM386 7 6 5 ouT Heres what pins LM386 inte grated circuit used 46 Model Aviation Mock-up built Scott Christensen demonstrate Gregg Seydels fine Idea improv ing fling-stab mounts Pivot left uses small squares circuit board material glued fin structure pivot-wire hole drilled number-drill no-slop fit Randy Culbertson shows ott 0 hIs low-aspect-ratIo designs lum Searcher 100 spans 100 has 75-to-one aspect ratio FX60-100 airfoil Wing area 181325 Sq Two-Meter version has 56-to Leon Kincaid has nifty way close gaps between wing roots fuse lage Scheme explained column 0 ssed safety Jack Hiner world record-holder Distance Altitude gave history variometers thermal sensors current use later about vario meter modification Jack has made Bob Sealy lectured fiberglass work presented line fuselages pro ducing examples craftsman ship its best Wayne Custer like manner showed Super Wings foam-core wings best tradition type construction Michael Selig rated top model-airfoil designer country fered opinions theories airfoil shapes youre getting feeling symposium leaned computeraided side modeling also slide presentation Fifth F3B World Championships Australia also Terry Edmonds gent fin ished first second third categories 1985 AMA Nats Continued page 131 Everyone stood up saluted Bob Sealys fine workmanshIp seen third annual MARCS symposium Piane Gemini bare fuselage example Bobs fine fiberglass work ASmAI WE ARE SHOOTING DOWN HIGH BALSA PRICES WITH SUPER QUALITYI Satisfaction Guaranteed Direct Only BALSA SN EETS 36 48 1/16233 3/32240 1/8 243 3/16248 1/4 256 1/33337 1/20337 1/163374831 3/323445837 1/8 3547146 3/163628255 1/4 3730661 5/16385 3/8 38812471 1/2 e3110155 3/4 3165 1/164587648 3/324709456 1/8 48010686 3/1648312275 1/4 411013484 3/8 225 1/2 4225261 MATCHED SHEETS 43 3/324100 1/84108 3/164120 1/44131 30, BALSA SliCKS 1/16 1/4 1/16 3/8 1/16 1/2 3/32 1/4 3/32 3/8 3/32 1/2 1/8 1/8 1/8 1/4 1/8 3/8 1/8 1/2 3/183/16 3/18 3/8 3/18 1/2 1/4 1/4 1/4 3/8 1/4 1/2 1/4 3/4 1/41 5/18 5/16 3/8 3/8 3/8 1/2 3/8 3/4 2/81 1/2 1/2 1/2 3/4 1/21 5/8 5/8 3/4 3/4 3648 09 10 14 10 12 16 08 1116 1218 1824 1116 17 2230 1624 1926 2130 3444 40 2126 2737 3246 4255 52 3653 4662 56 46 67 BALSA HOT LINE Ciii 806 745-6394 10 am -6pm Central lime LONE STAR MODELS 1623 57th St Lubbock TX 79412 WOOD 1/323 1/203 1/163 3/323 1/83 3/163 1/43 3/83 1/23 3/43 13 1/164 3/324 1/84 3/164 1/44 3/84 1/24 1W BALSA TRIANGLES 36 4425 383830 2235 343445 55 BALSA PLANKS 36 85 250 3200 4280 11/23276 11/24360 22225 23325 24435 33495 34658 TAPERED SHEETS36 1/42 65TRAILING EDGE36 1/43 851/4132 3/82 685/1611/439 3/83 983/811/246 1/231201/2270 LONE STAR EPOXY 9,L,1-835 5 ri598 15,,556 30 ne598 INS TAN CL UE 1 k 208 1 , Thi 208 2o Thick 500 2, Thie 500 CUSTOM CUT CONTEST BALSA Sheets Piece ed Close Tolerances AAA Grade Dried ped 100% serious modeler want performance BASSWOOD 3/16 3/16 3/161/4 3/163/8 3/16 1/2 3/163/4 1/4 1/4 1/43/8 1/4 3/4 3/8 3/8 3/81/2 3/8 3/4 1/2 1/2 1/23/4 must try 4-6 lb balsa 48 26 20 38 46 80 42 49 80 00 70 80 80 108 BUNDLE DEALS 201/6336685 201/164361020 20-3/32 336840 153/32436955 15-1/8336715 10-1/5436675 15-3/16336000 10-3/16436810 10-1/4336630 151/4436880 103/8336800 0-3/8436625 0-1/2336540 5-1/2436855 103/32448845 0-1/8448485 5-3/16448585 5-1/4449625 PINESTICKS 36 48 / HARD MAPLE 1/81/813171/43/8 1/81/416233/83/8 1/03/820273/81/2 3163/1617243/83/4 3/163/823321/23/4 3/161/23040 1/41/42637 14 3/83042I 1/41/23447 3/0 3/83762 SPRUCE SliCKS 36 48 1/8 1/815 1/8 1/41624 1/8 3/82029 3/163/162534 1/4 1/43145 1/4 3/83650 3/8 3/84563 3/6 1/25570 t/2 1/28080 1/2 3/448 88 SPRUCE TRIANGLES 3/83/6 1/2 1/2 3/43/4 BIRCH DO WELS 1/8 3/16 1/4 5/16 3/8 IS 40 46 50 08 68 36 09 11 14 20 32 3PLVBIRCH48 1/6412025 1/3212425 1/1612435 1/012450 SPLVBIRCH48 3/3212570 1/812585 363/1612585 401/412600 61 77 GROOVED LG MOUNTS LITEPLY 48 1/86154 1/812300 13 Inches 3/83/4/1/8/40 3/83/4/5/32/00 1/23/4/3/16/45 Handling Charge$30O pay UPS Add $200 COD $300 extra PP APO FPO accept Visa MasterCard personal checks COD 4-1/8% las Teas US currency 017 Minimam Order 01000 Sem LiGHT 4-6 LB 36 49 49 49 56 67 76 85 115 120 220 308 70 91 108 117 138 207 282 March 1986 47 Bob eaiy likes use thickernian-normai rib materialmakes up adding plenty lightening holes Hope covers transparent materla lilts lovely Photo Bob Sealy Jack Hiners boom box auuuouon Ace R/C Thermal Snifflers monitor Matched Performance System TOP PERFORMANCE K&B ENGINES AirplaneMarine K&B FUELSK&B GLOW PLUGS B Blends4 Cheices Matched Finish System BEST APPEARANCE K&B FIBERGLASS CLOTH K&B Micro-Balloons FILLER K&B SUPER POXY RESIN K&B SUPER FOXY THINNER K&B SUPER POXY PRIMER K&B SUPER POXY PAINT K&B MIXING CUPS sion centered third-order intermodula tion interference 31M considered test data presented George Steiner receivers Bill Hershberger transmit ters team Myers Aberle field tests both transmitters receivers have already seen Aberle/Myers data Radio Tech nique January February 1986 Flying Models magazine take Subsequent Frequency Commit tee meeting Bob Aberle went back field examine second-order product interference 20P question closely some thought passed off too easily Well can now report based much de tailed elaborate set tests find current crop receivers both AM FM single- dual-conversion have designed very nicely resist 20P less problem adjacent-channel interference 20 kHz raster far less important 31M George M Myers 70 Froehlich Farm Rd Hicksville NY 11801 RC Soaring/Pruss Continued page 47 along Gregg Seydel Scott Christ ensen Top Flite Models offered tricks trade under topic Contest Strategies Along above swap session socializingWisconsin style table clinics socializingWis consin style bull sessions socializ ingWisconsin style cost $15and included buffet lunch Saturday made contest cir cuit banquets look like Lenten fast days So can see fit Madison next Novembers first weekend can sure youll spend finest modeling get-togethers ever Never mind about eight inches snow fell programmed Dr Walt Good didnt think just going have drive country during trek up Florida Now some gadgets Leon Kincaid excellent designer builder see Scooter plans October 1983 issue Model Aviation has clever way getting airtight fit between wing roots fuselage Its also good secur ing wing halves matter Forget about tape idea does take bit building finesse job worth doing worth doing well During wing construction besides main wing joiners alignment tubes Leon installs second set tubes just behind main wing joiner shown photo Location critical tubing diameters arent either However larger diameters tubing better Notice saying diameters because key system fact wing tube telescopes other Which wing has larger tube isnt critical either Small holes carefully drilled wing tubes elongated slightly direction wingspan After wings joined fuselage flat steel tapered pin narrow end matches drilled holes insert ed forced holes As pin forced wing halves snugged up fuselage Nice Soaring Products Thermal Sniffler has production last 15 years now being manufactured distributed Ace R/C Inc no changes fine product ever receiver offered uses ear plug monitor Snifflers signal isnt bad arrangement tran quil summer afternoon However times loudspeaker would serve better others could listen insuch during LSF long-distance tasks cross-country flying teamwork important factor Jack Hiner found need such modification cir cuit parts list presented parts list end column Gregg Seydel has come up idea stabilizing stabilizerswell driven bellcrank up vertical fin anyway usual technique use bearing made brass tubing Continued page 135 6 NYRSeEB cm MACHE THE LEADER IN COMPETITION PROPELLERS NEW THP DESIGN TAILORED HELICAL PITCH DEVELOPEDTO GIVE MAXIMUM THRUST AT 4 CYCLE ENGINE RPM ALLTHE LATEST TECHNIQUES USED ON OUR PRO SERIES 3 SEE BELOW K DIAPITCH THP 126677/,8 13677/8 14677/8 1567 16678 NEW PRO SERIES 3 NEW HIGH TECH AIRFOIL SECTION lOTO 20% INCREASE IN THRUST MPG OF SELECT HARD MAPLE WOOD WILL NOT FATIGUE LIKE SYNTHETICS FUEL PROOF HIGH LUSTER FINISH DIAPITCHPRICE 53/34 149 634149 72833456179 83344568189 8/4566/7 199 94566h77/ 199 104566/7 209 106W8W209 106EW219 114677A7A78229 115W229 IiSEW239 1167239 124W 279 125W 279 1256 279 1356 349 1458 459 1556 659 164/N989 16678 969 RC PYLON RACING SERIES 500 DIA PITCH PRICE 7SN 5/N279 8I 6/7/,7A8 299 SERIES 400C 86677/7289 9777/289 W WIDE BLADE EW EXTRA WIDE N NARROW March 1986 131 PRICE 299 379 479 689 989 RC Soaring/Pruss Continued page 131 fin wire pivot-rod inserted result floppy stabilizer because usual loose tolerance tween wire tubing Some mod elers have come up remedies include larger bearing surfaces cant done some models especially smaller ones thin airfoil sections stab Greggs fix can considered almost universal Using 034-in circuit board material simply inlays two small squares left right skins vertical fin Using index drill precisely diameter pivot rod gives stab assembly thats rigid have try believe Fiberglass fuselages can use fix scabbing circuit board pieces side fin section finished models pieces could attached outside minor shimming being done root section stabilizer common wire diameters following should help 4-in music wire use No 52 index drill drilling circuit board /2-in music wire use No 42 drill way thickness circuit board material isnt critical Bob Sealy has line fiberglass/ epoxy fuselages mentioned MARCS Symposium report work absolutely finest quality Prices range $25 Two-Meter Stand ard-class sizes $70 cross-coun try/Unlimited-class fuselages line also includes some glass versions wellknown kit designs detailed catalog sheet send SASE Robert Sealy 521 96th Lane NE Blame MN 55434 phone 612 780-2737 following wont revolutionize RC Soaring did ever want use thicker rib material say A2-in balsa stead /16 didnt want weight penalty Well Sealy does obvious cuts lightening holes Depending rib size Sealy uses No 11 X-Acto blade plywood template smaller ribs uses brass plug-cutters says takes about five minutes per rib Now theres craftsman nothing time hands have just few ideas what some troops doing make modeling lives easier enjoyable Good lift Parts list Jack Hiners audio amplifier part description followed Radio Shack catalog number LM386 IC 2761731 10K potentiometer 27 1-335 eightohm speaker 40-1203C subminiature plug6 universal PC board 67184 220 mfd capacitor 272-956 SPST switch case assorted wire 9V battery battery connector Dan Pruss 131 F Pennington Ln Plain leld IL 60544 RC Scale/Wischers Continued page 49 Scale models wing already heavily loaded made stable adding weight First have changed longitudinal dihedral adding nose weight Down elevator trim now removed level flight Up ele vator trim substituted result down-force stabilizer-elevator combination increases rise airspeed tail depressed reduce speed nose rises speed drops off tail down-force dimin ishes raise tail positive stability formula fore-and-aft stabil ity used full-size aircraft Scale models tend decrease angular difference between wing tail incidence angles because engines weigh much less relative total plane weight full-size aircraft engine weight greater percentage total weight Decreasing angular difference leads longitudinal instability model flight tends hunt level position nose rising falling Add ing nose weight re-trimming eleva tor stops_the action model re mains level fore aft disturbed level flight will come back level its own Adding nose weight has done something extra provide lateral stability washed-out wing tips now flying positive aiigle attack doing share lifting wing tips have ceased continuous rise fall Ailerons large having excessive travel sought-after aileron author ity slow flight can have same effect warped wing Ailerons used establish steeply banked turn Recovery level flight application opposite aileron aileron low wing dropped attempt lifting side lowered aileron has great drag pulls nose down due adverse yaw pilot compensates everincreasing aileron steep turn angle attack increased point near stall Up elevator control because large portion wings lift being ex pended change direction flight rather support model Now lowered aileron acting like warped wing stall wing its aileron Stalls result excessive angle attack aileron actually modifies wing tips angle manner similar warp model snap-rolls over top spin could fatal low altitude isnt time airspace apply Down elevator recovery Several remedies available 1 Use less aileron elevator travel servo linkage 2 Learn use rudder con4$b OGA DESIGNS 44 Full Body Pilot Kit sLightest Pilot available sLifeilke vinyl la tex rubber parts Easy assemble finish eBuild either barnstormer sportsman pilot skit contains pilot head hands boots helmet cap goggles full templates easy instructions eFully positionable & moveable eSome simple sewing required WeightPrice 1/6Scale2oz$ 795 1/4 Scale4oz$ 995 lI3ScaleSoz*$1695 Weightmay vary depending material used construction DGA DESIGNS Bust Pilot Kit Weight 1/6 Scale 75 oz 1/4 Scale 1Soz 1/3 Scale 225 oz Price 595 795 $1495 sLightest bust pilot available sLifelike vinyl latex rubber parts sEasy assemble finish eBuild either barnstormer sportsman pilot Kit contains pilot head helmet cap goggles jacket instructions See dealer order direct Add $100 shipping direct orders Send $100 current catalog Dealers inquiries invited NYS Residents add 7 percent sales tax Send Check MO Allow 3 weeks check clearSorry-No COD s introducing. frebGll R/C Idle-Bar Glow Plugs Long Short Also.Only $1 69 Traditional line non-idle bar Glow Plugs Six Types 3 Heat Ranges High Performance Glow Element Blow Proof Seal Only $1 29 Swanson Associates PO Box 151 ne NJ 07470AI/Mk March 1986 135
Edition: Model Aviation - 1986/03
Page Numbers: 46, 47, 131, 135
rp ~itiii Soaring Dan Pruss GADGETS ideas should make life simpler workshop flying field months subject before get youve got hear what Madison Area Radio Con trol Society MARCS did first week November 1985 week end third annual RC symposium event just gets better year As past topics ranged high-tech presentations low-key discussions something everyone Introduction Aerodynamics HINERS AUDIO AMPLIFIER gv Sw presented Frank Baker Meteor ology Soaring Professor Roland Stull both gentlemen University Wisconsin Ken Bates entertained strong emphasis entertained 90-some folks first day lecture fly ing wings Any club Ann Arbor MI 6 Subminiature Plug5/ 2LM386 ReceiverlOKfl220 mfd BA Speaker 9v Jack Hiner built audio amp could use loudspeaker Thermal Sniffler circuit Radio Shacks Engineers Mini-Notebook Op Amps parts list end Dans column month area would well getting Ken club meetings comes complete slides sketches witty anecdotes Five cross-country experts Pat Flynn Noal Rossow Ken Bates Stan Watson Mark Stidhem discussed aspects cross-country flying cluded preparation tasks aircraft chase vehicles discussion cen tered around aircraft design construc tion techniques phases talk V 2 IN 3 IN 4 GND LM386 7 6 5 ouT Heres what pins LM386 inte grated circuit used 46 Model Aviation Mock-up built Scott Christensen demonstrate Gregg Seydels fine Idea improv ing fling-stab mounts Pivot left uses small squares circuit board material glued fin structure pivot-wire hole drilled number-drill no-slop fit Randy Culbertson shows ott 0 hIs low-aspect-ratIo designs lum Searcher 100 spans 100 has 75-to-one aspect ratio FX60-100 airfoil Wing area 181325 Sq Two-Meter version has 56-to Leon Kincaid has nifty way close gaps between wing roots fuse lage Scheme explained column 0 ssed safety Jack Hiner world record-holder Distance Altitude gave history variometers thermal sensors current use later about vario meter modification Jack has made Bob Sealy lectured fiberglass work presented line fuselages pro ducing examples craftsman ship its best Wayne Custer like manner showed Super Wings foam-core wings best tradition type construction Michael Selig rated top model-airfoil designer country fered opinions theories airfoil shapes youre getting feeling symposium leaned computeraided side modeling also slide presentation Fifth F3B World Championships Australia also Terry Edmonds gent fin ished first second third categories 1985 AMA Nats Continued page 131 Everyone stood up saluted Bob Sealys fine workmanshIp seen third annual MARCS symposium Piane Gemini bare fuselage example Bobs fine fiberglass work ASmAI WE ARE SHOOTING DOWN HIGH BALSA PRICES WITH SUPER QUALITYI Satisfaction Guaranteed Direct Only BALSA SN EETS 36 48 1/16233 3/32240 1/8 243 3/16248 1/4 256 1/33337 1/20337 1/163374831 3/323445837 1/8 3547146 3/163628255 1/4 3730661 5/16385 3/8 38812471 1/2 e3110155 3/4 3165 1/164587648 3/324709456 1/8 48010686 3/1648312275 1/4 411013484 3/8 225 1/2 4225261 MATCHED SHEETS 43 3/324100 1/84108 3/164120 1/44131 30, BALSA SliCKS 1/16 1/4 1/16 3/8 1/16 1/2 3/32 1/4 3/32 3/8 3/32 1/2 1/8 1/8 1/8 1/4 1/8 3/8 1/8 1/2 3/183/16 3/18 3/8 3/18 1/2 1/4 1/4 1/4 3/8 1/4 1/2 1/4 3/4 1/41 5/18 5/16 3/8 3/8 3/8 1/2 3/8 3/4 2/81 1/2 1/2 1/2 3/4 1/21 5/8 5/8 3/4 3/4 3648 09 10 14 10 12 16 08 1116 1218 1824 1116 17 2230 1624 1926 2130 3444 40 2126 2737 3246 4255 52 3653 4662 56 46 67 BALSA HOT LINE Ciii 806 745-6394 10 am -6pm Central lime LONE STAR MODELS 1623 57th St Lubbock TX 79412 WOOD 1/323 1/203 1/163 3/323 1/83 3/163 1/43 3/83 1/23 3/43 13 1/164 3/324 1/84 3/164 1/44 3/84 1/24 1W BALSA TRIANGLES 36 4425 383830 2235 343445 55 BALSA PLANKS 36 85 250 3200 4280 11/23276 11/24360 22225 23325 24435 33495 34658 TAPERED SHEETS36 1/42 65TRAILING EDGE36 1/43 851/4132 3/82 685/1611/439 3/83 983/811/246 1/231201/2270 LONE STAR EPOXY 9,L,1-835 5 ri598 15,,556 30 ne598 INS TAN CL UE 1 k 208 1 , Thi 208 2o Thick 500 2, Thie 500 CUSTOM CUT CONTEST BALSA Sheets Piece ed Close Tolerances AAA Grade Dried ped 100% serious modeler want performance BASSWOOD 3/16 3/16 3/161/4 3/163/8 3/16 1/2 3/163/4 1/4 1/4 1/43/8 1/4 3/4 3/8 3/8 3/81/2 3/8 3/4 1/2 1/2 1/23/4 must try 4-6 lb balsa 48 26 20 38 46 80 42 49 80 00 70 80 80 108 BUNDLE DEALS 201/6336685 201/164361020 20-3/32 336840 153/32436955 15-1/8336715 10-1/5436675 15-3/16336000 10-3/16436810 10-1/4336630 151/4436880 103/8336800 0-3/8436625 0-1/2336540 5-1/2436855 103/32448845 0-1/8448485 5-3/16448585 5-1/4449625 PINESTICKS 36 48 / HARD MAPLE 1/81/813171/43/8 1/81/416233/83/8 1/03/820273/81/2 3163/1617243/83/4 3/163/823321/23/4 3/161/23040 1/41/42637 14 3/83042I 1/41/23447 3/0 3/83762 SPRUCE SliCKS 36 48 1/8 1/815 1/8 1/41624 1/8 3/82029 3/163/162534 1/4 1/43145 1/4 3/83650 3/8 3/84563 3/6 1/25570 t/2 1/28080 1/2 3/448 88 SPRUCE TRIANGLES 3/83/6 1/2 1/2 3/43/4 BIRCH DO WELS 1/8 3/16 1/4 5/16 3/8 IS 40 46 50 08 68 36 09 11 14 20 32 3PLVBIRCH48 1/6412025 1/3212425 1/1612435 1/012450 SPLVBIRCH48 3/3212570 1/812585 363/1612585 401/412600 61 77 GROOVED LG MOUNTS LITEPLY 48 1/86154 1/812300 13 Inches 3/83/4/1/8/40 3/83/4/5/32/00 1/23/4/3/16/45 Handling Charge$30O pay UPS Add $200 COD $300 extra PP APO FPO accept Visa MasterCard personal checks COD 4-1/8% las Teas US currency 017 Minimam Order 01000 Sem LiGHT 4-6 LB 36 49 49 49 56 67 76 85 115 120 220 308 70 91 108 117 138 207 282 March 1986 47 Bob eaiy likes use thickernian-normai rib materialmakes up adding plenty lightening holes Hope covers transparent materla lilts lovely Photo Bob Sealy Jack Hiners boom box auuuouon Ace R/C Thermal Snifflers monitor Matched Performance System TOP PERFORMANCE K&B ENGINES AirplaneMarine K&B FUELSK&B GLOW PLUGS B Blends4 Cheices Matched Finish System BEST APPEARANCE K&B FIBERGLASS CLOTH K&B Micro-Balloons FILLER K&B SUPER POXY RESIN K&B SUPER FOXY THINNER K&B SUPER POXY PRIMER K&B SUPER POXY PAINT K&B MIXING CUPS sion centered third-order intermodula tion interference 31M considered test data presented George Steiner receivers Bill Hershberger transmit ters team Myers Aberle field tests both transmitters receivers have already seen Aberle/Myers data Radio Tech nique January February 1986 Flying Models magazine take Subsequent Frequency Commit tee meeting Bob Aberle went back field examine second-order product interference 20P question closely some thought passed off too easily Well can now report based much de tailed elaborate set tests find current crop receivers both AM FM single- dual-conversion have designed very nicely resist 20P less problem adjacent-channel interference 20 kHz raster far less important 31M George M Myers 70 Froehlich Farm Rd Hicksville NY 11801 RC Soaring/Pruss Continued page 47 along Gregg Seydel Scott Christ ensen Top Flite Models offered tricks trade under topic Contest Strategies Along above swap session socializingWisconsin style table clinics socializingWis consin style bull sessions socializ ingWisconsin style cost $15and included buffet lunch Saturday made contest cir cuit banquets look like Lenten fast days So can see fit Madison next Novembers first weekend can sure youll spend finest modeling get-togethers ever Never mind about eight inches snow fell programmed Dr Walt Good didnt think just going have drive country during trek up Florida Now some gadgets Leon Kincaid excellent designer builder see Scooter plans October 1983 issue Model Aviation has clever way getting airtight fit between wing roots fuselage Its also good secur ing wing halves matter Forget about tape idea does take bit building finesse job worth doing worth doing well During wing construction besides main wing joiners alignment tubes Leon installs second set tubes just behind main wing joiner shown photo Location critical tubing diameters arent either However larger diameters tubing better Notice saying diameters because key system fact wing tube telescopes other Which wing has larger tube isnt critical either Small holes carefully drilled wing tubes elongated slightly direction wingspan After wings joined fuselage flat steel tapered pin narrow end matches drilled holes insert ed forced holes As pin forced wing halves snugged up fuselage Nice Soaring Products Thermal Sniffler has production last 15 years now being manufactured distributed Ace R/C Inc no changes fine product ever receiver offered uses ear plug monitor Snifflers signal isnt bad arrangement tran quil summer afternoon However times loudspeaker would serve better others could listen insuch during LSF long-distance tasks cross-country flying teamwork important factor Jack Hiner found need such modification cir cuit parts list presented parts list end column Gregg Seydel has come up idea stabilizing stabilizerswell driven bellcrank up vertical fin anyway usual technique use bearing made brass tubing Continued page 135 6 NYRSeEB cm MACHE THE LEADER IN COMPETITION PROPELLERS NEW THP DESIGN TAILORED HELICAL PITCH DEVELOPEDTO GIVE MAXIMUM THRUST AT 4 CYCLE ENGINE RPM ALLTHE LATEST TECHNIQUES USED ON OUR PRO SERIES 3 SEE BELOW K DIAPITCH THP 126677/,8 13677/8 14677/8 1567 16678 NEW PRO SERIES 3 NEW HIGH TECH AIRFOIL SECTION lOTO 20% INCREASE IN THRUST MPG OF SELECT HARD MAPLE WOOD WILL NOT FATIGUE LIKE SYNTHETICS FUEL PROOF HIGH LUSTER FINISH DIAPITCHPRICE 53/34 149 634149 72833456179 83344568189 8/4566/7 199 94566h77/ 199 104566/7 209 106W8W209 106EW219 114677A7A78229 115W229 IiSEW239 1167239 124W 279 125W 279 1256 279 1356 349 1458 459 1556 659 164/N989 16678 969 RC PYLON RACING SERIES 500 DIA PITCH PRICE 7SN 5/N279 8I 6/7/,7A8 299 SERIES 400C 86677/7289 9777/289 W WIDE BLADE EW EXTRA WIDE N NARROW March 1986 131 PRICE 299 379 479 689 989 RC Soaring/Pruss Continued page 131 fin wire pivot-rod inserted result floppy stabilizer because usual loose tolerance tween wire tubing Some mod elers have come up remedies include larger bearing surfaces cant done some models especially smaller ones thin airfoil sections stab Greggs fix can considered almost universal Using 034-in circuit board material simply inlays two small squares left right skins vertical fin Using index drill precisely diameter pivot rod gives stab assembly thats rigid have try believe Fiberglass fuselages can use fix scabbing circuit board pieces side fin section finished models pieces could attached outside minor shimming being done root section stabilizer common wire diameters following should help 4-in music wire use No 52 index drill drilling circuit board /2-in music wire use No 42 drill way thickness circuit board material isnt critical Bob Sealy has line fiberglass/ epoxy fuselages mentioned MARCS Symposium report work absolutely finest quality Prices range $25 Two-Meter Stand ard-class sizes $70 cross-coun try/Unlimited-class fuselages line also includes some glass versions wellknown kit designs detailed catalog sheet send SASE Robert Sealy 521 96th Lane NE Blame MN 55434 phone 612 780-2737 following wont revolutionize RC Soaring did ever want use thicker rib material say A2-in balsa stead /16 didnt want weight penalty Well Sealy does obvious cuts lightening holes Depending rib size Sealy uses No 11 X-Acto blade plywood template smaller ribs uses brass plug-cutters says takes about five minutes per rib Now theres craftsman nothing time hands have just few ideas what some troops doing make modeling lives easier enjoyable Good lift Parts list Jack Hiners audio amplifier part description followed Radio Shack catalog number LM386 IC 2761731 10K potentiometer 27 1-335 eightohm speaker 40-1203C subminiature plug6 universal PC board 67184 220 mfd capacitor 272-956 SPST switch case assorted wire 9V battery battery connector Dan Pruss 131 F Pennington Ln Plain leld IL 60544 RC Scale/Wischers Continued page 49 Scale models wing already heavily loaded made stable adding weight First have changed longitudinal dihedral adding nose weight Down elevator trim now removed level flight Up ele vator trim substituted result down-force stabilizer-elevator combination increases rise airspeed tail depressed reduce speed nose rises speed drops off tail down-force dimin ishes raise tail positive stability formula fore-and-aft stabil ity used full-size aircraft Scale models tend decrease angular difference between wing tail incidence angles because engines weigh much less relative total plane weight full-size aircraft engine weight greater percentage total weight Decreasing angular difference leads longitudinal instability model flight tends hunt level position nose rising falling Add ing nose weight re-trimming eleva tor stops_the action model re mains level fore aft disturbed level flight will come back level its own Adding nose weight has done something extra provide lateral stability washed-out wing tips now flying positive aiigle attack doing share lifting wing tips have ceased continuous rise fall Ailerons large having excessive travel sought-after aileron author ity slow flight can have same effect warped wing Ailerons used establish steeply banked turn Recovery level flight application opposite aileron aileron low wing dropped attempt lifting side lowered aileron has great drag pulls nose down due adverse yaw pilot compensates everincreasing aileron steep turn angle attack increased point near stall Up elevator control because large portion wings lift being ex pended change direction flight rather support model Now lowered aileron acting like warped wing stall wing its aileron Stalls result excessive angle attack aileron actually modifies wing tips angle manner similar warp model snap-rolls over top spin could fatal low altitude isnt time airspace apply Down elevator recovery Several remedies available 1 Use less aileron elevator travel servo linkage 2 Learn use rudder con4$b OGA DESIGNS 44 Full Body Pilot Kit sLightest Pilot available sLifeilke vinyl la tex rubber parts Easy assemble finish eBuild either barnstormer sportsman pilot skit contains pilot head hands boots helmet cap goggles full templates easy instructions eFully positionable & moveable eSome simple sewing required WeightPrice 1/6Scale2oz$ 795 1/4 Scale4oz$ 995 lI3ScaleSoz*$1695 Weightmay vary depending material used construction DGA DESIGNS Bust Pilot Kit Weight 1/6 Scale 75 oz 1/4 Scale 1Soz 1/3 Scale 225 oz Price 595 795 $1495 sLightest bust pilot available sLifelike vinyl latex rubber parts sEasy assemble finish eBuild either barnstormer sportsman pilot Kit contains pilot head helmet cap goggles jacket instructions See dealer order direct Add $100 shipping direct orders Send $100 current catalog Dealers inquiries invited NYS Residents add 7 percent sales tax Send Check MO Allow 3 weeks check clearSorry-No COD s introducing. frebGll R/C Idle-Bar Glow Plugs Long Short Also.Only $1 69 Traditional line non-idle bar Glow Plugs Six Types 3 Heat Ranges High Performance Glow Element Blow Proof Seal Only $1 29 Swanson Associates PO Box 151 ne NJ 07470AI/Mk March 1986 135