SOARING Dan Pruss KEN BATES Ann Arbor Michigan passes along some information flying wing devo tees see plans Windlord MA March 1978 later version called Manx 1978 Toledo winner Ken ran stability problems Everything drawing board said bird should fly didnt well anyway So drawing board Ken went building board found stack-sanding ribs some extra material left bottom rear airfoil section about 1/16 inch largest rib naked eyeball would seem like little added reflex little harm would done right Wrong average conventional floater type not-so-scientific French Curve 12 airfoil gets plotted Overshoe 9 D outline looks good might get away looks good itll fly good approach Isnt flying wings tailless horizontal stabilizerless designs designs sailplane has conventional wing tail layout tail will allow designer/flier get away certain design balance errors would make honest aerodynamicists cringe Tailless designs flying wings have very narrow margin forgiveness biggest head scratches designers flying wings build longitudinal stability through wide speed range An airfoil reflex solves part problem amount reflex critical isnt much else keep wing tumbling like falling leaf What Bates found out extra 1/16 inch bottom rear half airfoil instead what seemed little added sanding block reflex whole lot aero dynamic reflex What occurred mean camber line datum line crossover shifted forward point airfoil became unstable due too much reflex some cases STA 0 125 25 50 75 10 15 20 25 5S202510 UPR 0 275 370 504 5-97 659 734 759 759 450070do0oO NACA 23112-75 LWR 0 -120 -168 -214 -249 -278 -335 -389 -428 STA 30 40 50 60 70 80 90 100 LER UPR 7 A6 686 698 496 366 2 A8 120 13 SLOPE 337 LWR -455 -476 -463 -426 -352 -2 A8 -130 - 13 Manxs NACA 23112-75 airfoil section slight building error left too much material bottom surface ribs station 50 aft Read story explanations occurred 30% chord proper point 75% airfoil because little extra material literally upside down backwards Manxs 161 aspect ratio high side flying wings Ken points out exacting airfoil plotting along accurate con struction imperative Roll spoilers very effective both roll yaw control However Ken feels ailerons rudder would better job ailerons could fine-tuned reflex settings rudder would used over come lift loss spoilers now tend produce Ken also submitted coordinates NACA 23112-75 airfoil again stresses plot cut ribs accurately have drawbacks wider interest scale whether standoff museum type sailplane contests few reasons can offered Among lack subjects kit form lack scale contests generate interest almost-look-alike all-white glass ships regardless design reluctance build oldtimer because wouldnt compete against almost-look-alike all-white glass ships few suggestions have made encourage building models both old types newer designs offering ideas such having two categories pre-1946 1946 after wasnt cure-all solution because doggy designs didnt stop appearing after 1946 matter few slick designs did Continued May 1980 29 UFO Ken Batestailless Manxflies Photo above shows lines glider good advantage Without flight shot photo below looks like conventional glider tail breaking off duringthe launch Ken hadtrouble design first Careful check builtairfoilvs design plotshowedtheproblem now flies well 161 aspect ratio Californias Chris Adamswith scratch-built scale Caproni A21 Lnrls holds LSF Level V award model look-alike Doc Dennis Hall scale scratch-built Schule Glider always earns top static points cant soar all-glass ships Stan Watsons rule proposal see story would give beautiful nostalgic designs like chance top winners SIMITAR WINS 1St PLACEPATTERN PRE-NOVICE 1979 WINTER NATS SIMITAR NEW. SI MI TAR SIMITAR SIMITAR SPORT SIMITAR 19 40 Power 50 Inch Span SIMITAR Standard Kit includes Ply Wing Sheeting SIMITARBdlsdFuseiage$5995 SIMITARGear Formed Sliding Tray SIMIlARFull Site Plans SIMITAR WINS 1St PLACENORTHROP FLYING WING CONTEST 1979 NEWT-SHIRTS High Quality 1000 n $ ulti-color Silkscreen U Sites SML&XL Eleck Rider Yellow Plus $100 Asiron Light Blue Shipping Simitar 540--Tan Charge SEE YOUR DEALER OR ORDER FROM BILL EVANS ~AIR/CRAFT 20825 ROSCOF BLVD CANOGA PARK CA 91306 TEL 213 344-6391 OR 709-0894 GRUMMAN WIDGEON MR Gs PRODUCTS 1100 Michigan Box 161 Mai-ysville Nil 4804 RC Soaring/Pruss continued page 29 appear before World War II So chronologically really wasnt cutoff point older designs starting date newer ones previous large Contests organizers could chance including scale event few stalwarts such Geier Hall Pearson Thacker usually showed up ships qualified separate category own because quality building because scale subjects us cheered Schule Glider Doc Hall same group knew Hall slim chance 10-minute duration event against likes Chris Adams sleek Caproni A21 unless lift such manhole covers out maxing Frisbees models Geier Pearson Thacker just also-rans isnt meant demean efforts fliers glass birds However date hasnt contest mixture various models ever left final results up grabs Well maybe following isnt cure-all above Stan Watson Hazel Crest IL has come up suggestion just could INDOOR MODEL SUPPLIES Box C Garberville CA 95440 PIRELLI RUBBER9e leteyIIhscI siase between 0206176 & ORb OUS in,insnne 3/32 7/64 & 116196 FAI BALSA1/lOK 1/64 10/IUU0thoagh25/1600 1/32 3/64126 1/163/32 esReed 9150 long 24 A&B gsi175 QUALITY BALSAAB&C gein sizes tepssd soar65 MICROFILM BEeoepIoeIly seehie etong light & itpoed296 MICROFILM AEsen Iiltng& blendable will Bee dse,ad295 QUICK STICK BALSA CEMENT Will flotbowl,beslhroughehinkege125 STICK TIUKT BALSA CEMENT N, eSinkage & blanagAle will US125 THINNERFe wend tenlenle MiteIiln A&R100 CONSENSKR PAPER CEMENT Sly 4 nin-eIetgIhens wond w/t ehinl125 RUBRER LUBEFleeS inAne tonIcs blend wins no weUr1SU ULUE SUNWilbeelee lee saeeenine en MT sear end booms375 NICOROME WIRE001 Riwgn wing haee 50 015025150 SYNS WIRE0007 1/3 weight OUONitlr US 175 25125 SONS WIRE0005 00%wnet557elabgs&eetwtda0h125 TUNGSTEN WIRE501 Ne elenaednn met, e,hs heing 25150 SHAFT WIRE010 012014 015 end 025 State sige eanI35 GLASSPORMSRelIingelhelsam,tnIohee3/1t 7/329/325/1U75 BOOM FORMUtieseesl bas en toll nail benme lGUS THRUST BEARINGTsnneed elan TINT 60 Sane 660 SinaI RAL100 TEFLONWABOERS00 07.Ut eds 07l,OlSwie150 RUBBER WINDERS6 itch, 6495 tHtet,595 MICRO WEISOTS100 e ,s end 200mg 160 CONDENSER PAPOR UIIallglI 30 sheene 2 shsels Os oIi200 MICROLITE FILMLwhanB eneengerthen CP went shrink per yd225 UILVE9 MICROLITE Saws nhwhness se snendend clear tsr yd275 Orders under $10 add $1 LEWGITLOW postage Orders over $10 4.nm add 5% postage encourage scale building older type sailplanes 5mixing categories Again might answer sure step right direction suggestion original parameter chosen represent full-scale performance event L/D ratio ratio generally given number such 20 37 sometimes high 50 modern 15-meter sailplanes have LID ratios around 40 have chosen number construct ratio will adjust maxes model entered essence Stan has come up formula L/D symbols whichreadsDxj defined follows D tion task say six minutes L/D -to-drag ratio full-size sailplane modeling 40 age high performance sailplanes would constant formula So decide build something out early 30s published L/D say 20 above formula six-minute max contest would required get three minutes almost-look-alike allwhite glass ships would shooting six minutes Stan offers few ideas youre interested send stamped self-addressed envel ope three-page copy proposal Stan Watson 3402 Hickory Lane Hazel Crest IL 60429 References full-scale sailplane specifica tions include Americas Soaring Book editors Flying Magazine Die Benahmtesten Segelj7ugzeuge Germany George Brutting Soarers Italy Ferdi Gale Carbon fiber spars Bill Mueller Hi-Flight Model Products has announced producing carbon fiber spars 36- 48-inch lengths Widths cknesses ngth spars unbelievable Its safe bet say spars will construction sailplanes what MonoKote did covering Other applications spars could looked such blades wing joiners slim booms pod boom designers See dealer write Hi-Flight Model Products 43225 Whittier Avenue Hemet CA 92343 Send now department Just received notice SOAR/Utah sailplane group out thataway hosting RC soaring/vacation week July 27 August 3 Theyre offering Alpine Thermal Slope soaring Lodging available side trips Festivities also include art shows symphonyjazz pop concerts swimming tennis Snowbirdjust outside Salt Lake City Utah brochure makes look quite inviting information write Loel H Schoonover 1425 South 320 East Orem UT 84057 Don Hamilton 760 West Crest Orem UT 84057 team competition has club fired up theres cross-country race being scheduled out Hutchinson Kansas Its 15-mile event particulars can obtained mail Pat McCleave 205 East 13th Hutchinson KS 67501 Keep building Dan Pruss RR 2 Box 490 Plainfield IL 60544 RC Giant Scale/Beckman continued page 30 dont mean disparage plan-built model kit-built Over years Ive certainly built plenty both Its just feel term scratch-built should really mean starting scratch nothing desired flight char acteristics mind case scale model necessary information about original airplane built kit finished model usually identified kit manufacturer talk about Nosen P-51s Bridi Rearwins think plan-built airplanes should giving same kind credit publicity person put time effort designing Two examples come mind Bob Morses fine Cessna 180 Don Godfreys outstanding Super Stearman Giant Scale plans available some advertised model mags interested plan-building intend review plans can get hold pass comments opinions have plans available send list what have prices get etc copy least offerings will retumed Ill give objective report possibly can Plan-building logical step between kitbuilding scratch-building youve got 102 Model Aviation Ultimate Flying Boat The
Edition: Model Aviation - 1980/05
Page Numbers: 29, 102
SOARING Dan Pruss KEN BATES Ann Arbor Michigan passes along some information flying wing devo tees see plans Windlord MA March 1978 later version called Manx 1978 Toledo winner Ken ran stability problems Everything drawing board said bird should fly didnt well anyway So drawing board Ken went building board found stack-sanding ribs some extra material left bottom rear airfoil section about 1/16 inch largest rib naked eyeball would seem like little added reflex little harm would done right Wrong average conventional floater type not-so-scientific French Curve 12 airfoil gets plotted Overshoe 9 D outline looks good might get away looks good itll fly good approach Isnt flying wings tailless horizontal stabilizerless designs designs sailplane has conventional wing tail layout tail will allow designer/flier get away certain design balance errors would make honest aerodynamicists cringe Tailless designs flying wings have very narrow margin forgiveness biggest head scratches designers flying wings build longitudinal stability through wide speed range An airfoil reflex solves part problem amount reflex critical isnt much else keep wing tumbling like falling leaf What Bates found out extra 1/16 inch bottom rear half airfoil instead what seemed little added sanding block reflex whole lot aero dynamic reflex What occurred mean camber line datum line crossover shifted forward point airfoil became unstable due too much reflex some cases STA 0 125 25 50 75 10 15 20 25 5S202510 UPR 0 275 370 504 5-97 659 734 759 759 450070do0oO NACA 23112-75 LWR 0 -120 -168 -214 -249 -278 -335 -389 -428 STA 30 40 50 60 70 80 90 100 LER UPR 7 A6 686 698 496 366 2 A8 120 13 SLOPE 337 LWR -455 -476 -463 -426 -352 -2 A8 -130 - 13 Manxs NACA 23112-75 airfoil section slight building error left too much material bottom surface ribs station 50 aft Read story explanations occurred 30% chord proper point 75% airfoil because little extra material literally upside down backwards Manxs 161 aspect ratio high side flying wings Ken points out exacting airfoil plotting along accurate con struction imperative Roll spoilers very effective both roll yaw control However Ken feels ailerons rudder would better job ailerons could fine-tuned reflex settings rudder would used over come lift loss spoilers now tend produce Ken also submitted coordinates NACA 23112-75 airfoil again stresses plot cut ribs accurately have drawbacks wider interest scale whether standoff museum type sailplane contests few reasons can offered Among lack subjects kit form lack scale contests generate interest almost-look-alike all-white glass ships regardless design reluctance build oldtimer because wouldnt compete against almost-look-alike all-white glass ships few suggestions have made encourage building models both old types newer designs offering ideas such having two categories pre-1946 1946 after wasnt cure-all solution because doggy designs didnt stop appearing after 1946 matter few slick designs did Continued May 1980 29 UFO Ken Batestailless Manxflies Photo above shows lines glider good advantage Without flight shot photo below looks like conventional glider tail breaking off duringthe launch Ken hadtrouble design first Careful check builtairfoilvs design plotshowedtheproblem now flies well 161 aspect ratio Californias Chris Adamswith scratch-built scale Caproni A21 Lnrls holds LSF Level V award model look-alike Doc Dennis Hall scale scratch-built Schule Glider always earns top static points cant soar all-glass ships Stan Watsons rule proposal see story would give beautiful nostalgic designs like chance top winners SIMITAR WINS 1St PLACEPATTERN PRE-NOVICE 1979 WINTER NATS SIMITAR NEW. SI MI TAR SIMITAR SIMITAR SPORT SIMITAR 19 40 Power 50 Inch Span SIMITAR Standard Kit includes Ply Wing Sheeting SIMITARBdlsdFuseiage$5995 SIMITARGear Formed Sliding Tray SIMIlARFull Site Plans SIMITAR WINS 1St PLACENORTHROP FLYING WING CONTEST 1979 NEWT-SHIRTS High Quality 1000 n $ ulti-color Silkscreen U Sites SML&XL Eleck Rider Yellow Plus $100 Asiron Light Blue Shipping Simitar 540--Tan Charge SEE YOUR DEALER OR ORDER FROM BILL EVANS ~AIR/CRAFT 20825 ROSCOF BLVD CANOGA PARK CA 91306 TEL 213 344-6391 OR 709-0894 GRUMMAN WIDGEON MR Gs PRODUCTS 1100 Michigan Box 161 Mai-ysville Nil 4804 RC Soaring/Pruss continued page 29 appear before World War II So chronologically really wasnt cutoff point older designs starting date newer ones previous large Contests organizers could chance including scale event few stalwarts such Geier Hall Pearson Thacker usually showed up ships qualified separate category own because quality building because scale subjects us cheered Schule Glider Doc Hall same group knew Hall slim chance 10-minute duration event against likes Chris Adams sleek Caproni A21 unless lift such manhole covers out maxing Frisbees models Geier Pearson Thacker just also-rans isnt meant demean efforts fliers glass birds However date hasnt contest mixture various models ever left final results up grabs Well maybe following isnt cure-all above Stan Watson Hazel Crest IL has come up suggestion just could INDOOR MODEL SUPPLIES Box C Garberville CA 95440 PIRELLI RUBBER9e leteyIIhscI siase between 0206176 & ORb OUS in,insnne 3/32 7/64 & 116196 FAI BALSA1/lOK 1/64 10/IUU0thoagh25/1600 1/32 3/64126 1/163/32 esReed 9150 long 24 A&B gsi175 QUALITY BALSAAB&C gein sizes tepssd soar65 MICROFILM BEeoepIoeIly seehie etong light & itpoed296 MICROFILM AEsen Iiltng& blendable will Bee dse,ad295 QUICK STICK BALSA CEMENT Will flotbowl,beslhroughehinkege125 STICK TIUKT BALSA CEMENT N, eSinkage & blanagAle will US125 THINNERFe wend tenlenle MiteIiln A&R100 CONSENSKR PAPER CEMENT Sly 4 nin-eIetgIhens wond w/t ehinl125 RUBRER LUBEFleeS inAne tonIcs blend wins no weUr1SU ULUE SUNWilbeelee lee saeeenine en MT sear end booms375 NICOROME WIRE001 Riwgn wing haee 50 015025150 SYNS WIRE0007 1/3 weight OUONitlr US 175 25125 SONS WIRE0005 00%wnet557elabgs&eetwtda0h125 TUNGSTEN WIRE501 Ne elenaednn met, e,hs heing 25150 SHAFT WIRE010 012014 015 end 025 State sige eanI35 GLASSPORMSRelIingelhelsam,tnIohee3/1t 7/329/325/1U75 BOOM FORMUtieseesl bas en toll nail benme lGUS THRUST BEARINGTsnneed elan TINT 60 Sane 660 SinaI RAL100 TEFLONWABOERS00 07.Ut eds 07l,OlSwie150 RUBBER WINDERS6 itch, 6495 tHtet,595 MICRO WEISOTS100 e ,s end 200mg 160 CONDENSER PAPOR UIIallglI 30 sheene 2 shsels Os oIi200 MICROLITE FILMLwhanB eneengerthen CP went shrink per yd225 UILVE9 MICROLITE Saws nhwhness se snendend clear tsr yd275 Orders under $10 add $1 LEWGITLOW postage Orders over $10 4.nm add 5% postage encourage scale building older type sailplanes 5mixing categories Again might answer sure step right direction suggestion original parameter chosen represent full-scale performance event L/D ratio ratio generally given number such 20 37 sometimes high 50 modern 15-meter sailplanes have LID ratios around 40 have chosen number construct ratio will adjust maxes model entered essence Stan has come up formula L/D symbols whichreadsDxj defined follows D tion task say six minutes L/D -to-drag ratio full-size sailplane modeling 40 age high performance sailplanes would constant formula So decide build something out early 30s published L/D say 20 above formula six-minute max contest would required get three minutes almost-look-alike allwhite glass ships would shooting six minutes Stan offers few ideas youre interested send stamped self-addressed envel ope three-page copy proposal Stan Watson 3402 Hickory Lane Hazel Crest IL 60429 References full-scale sailplane specifica tions include Americas Soaring Book editors Flying Magazine Die Benahmtesten Segelj7ugzeuge Germany George Brutting Soarers Italy Ferdi Gale Carbon fiber spars Bill Mueller Hi-Flight Model Products has announced producing carbon fiber spars 36- 48-inch lengths Widths cknesses ngth spars unbelievable Its safe bet say spars will construction sailplanes what MonoKote did covering Other applications spars could looked such blades wing joiners slim booms pod boom designers See dealer write Hi-Flight Model Products 43225 Whittier Avenue Hemet CA 92343 Send now department Just received notice SOAR/Utah sailplane group out thataway hosting RC soaring/vacation week July 27 August 3 Theyre offering Alpine Thermal Slope soaring Lodging available side trips Festivities also include art shows symphonyjazz pop concerts swimming tennis Snowbirdjust outside Salt Lake City Utah brochure makes look quite inviting information write Loel H Schoonover 1425 South 320 East Orem UT 84057 Don Hamilton 760 West Crest Orem UT 84057 team competition has club fired up theres cross-country race being scheduled out Hutchinson Kansas Its 15-mile event particulars can obtained mail Pat McCleave 205 East 13th Hutchinson KS 67501 Keep building Dan Pruss RR 2 Box 490 Plainfield IL 60544 RC Giant Scale/Beckman continued page 30 dont mean disparage plan-built model kit-built Over years Ive certainly built plenty both Its just feel term scratch-built should really mean starting scratch nothing desired flight char acteristics mind case scale model necessary information about original airplane built kit finished model usually identified kit manufacturer talk about Nosen P-51s Bridi Rearwins think plan-built airplanes should giving same kind credit publicity person put time effort designing Two examples come mind Bob Morses fine Cessna 180 Don Godfreys outstanding Super Stearman Giant Scale plans available some advertised model mags interested plan-building intend review plans can get hold pass comments opinions have plans available send list what have prices get etc copy least offerings will retumed Ill give objective report possibly can Plan-building logical step between kitbuilding scratch-building youve got 102 Model Aviation Ultimate Flying Boat The