SPORT AEROBATICS Ron Van Putte AS sat down write column realized five years ago first column sent Model nation During first column introduced myself described plans future occurred current readers never read first column appropriate update situation anniversary am aeronautical engineer degree Purdue University two degrees D--TH T FIG 1 AC 6 B 2 I-RT T1D J3 RT University Michigan 1959 1979 officer Air Force After retirement six month mandatory waiting period federal regulation returned job left Air Force Armament Laboratory Civil Service employee time work involves analyzing effects new weapons aircraft carry vice versa involvement fascinating hobby began college freshman 1954 has continued since several delays college During last 26 years have flown wide spectrum radio/aircraft/engine combina tions days Ill publish picture first radio system featured home built ground-based transmitter eleven foot antenna ECE vacuum tube receiver Bonner SN escapement two 22 volt four lV2 volt batteries Despite relative crudity high weight unreliability radio system great flights Harold deBolts Kitten airplanes never idea advances electronics would produce kind radios have today long time ago sat down listed airplanes Ive owned surprised discover average about airplane year hobby Included list deBolt Sonic Cruiser Viscount two Goldberg Senior LSTAILI WING -T L \ RT AC B FIG 3 F 385 WING IOOFS TAIL Falcons Midwest Esquire Lanier P-s 1 Bridi Kaos 60 Du-Bro Cherokee Arrow Beachcomber Intruder Andrews Trainermaster Phoenix III Phoenix V two Phoenix VIs Phoenix VIII Once involved RC pattern competition hooked first pattern contest Indianapolis Indiana 1966 Senior Falcon demolished maneuver called Scrambled Eight overhead eight half up right half inverted Youd think that would have end pattern flying career encouraged good friend named Don Lowe Over years Don has developed World Class pattern flier serves model kind flier want hope people can see some smooth Lowe style way Phoenix flies Last fall moved up after four years Advanced now fly Expert pattern fair-togood degree competence contests throughout Southeastern states Once get Figure M Half Rolls Eight Point Roll sorted Out scores will improve competitive drive has continued undiminished over years sweaty palms shaking knees pound ing heart routine repeats itself time step flight line contest will continue Continued page 105 FIG 2 CGAC h-rH FIG 4 AC CG II 12 P LSTAIL _ R 4-RTT 3SWING15RT 18 Model Aviation wheel courseas realistically full scale cousins Hegi showed 15 scale ASWl5 larger scale types fuselage epoxy molded wing balsa covered foam should further pointed out although models carry proud price tag quality top notch degree completion just short adding finishing touches Two manu facturers kept drool factor high Wik Wanitschek Wanitscheks line includes LS-l Club LS-3-l 7 LS-1 375 meters span LS-3 425 meters Others line include Jantar 2 span 41 meters 15 scale An HP-l 8 scale 14 375 meters span Jantar 1 also 14 scale bird span 475 meters Built-up wings keep cost down Price 43160 DM Wik showed sailplane real looking full scale version should built Its called Condor sports rudder elevator ailerons trailing edge speed brakes However best show 14 Astir C S-77 15 Twin Astir get nod also complete point installing spoilers ailerons shaped cut out hardware provided Cost large scale birds Anywhere 250 600 dollars Worth Yes might hard justifying cost yourself models worth price time worth thing its certain couldnt build scratch less Availability Contact Jerry Nelson Midwest Model Supply 1354 Naper yule Drive Romeo ville IL 60441 Phone 312 759-1955 Jerry also spent much time various sailplane booths both came away quite impressed quality big birds Another thing agreed week wasnt long enough still few bratwursts left Dan Pruss RA 2 Box 490 Plainfleld IL 60544 RC Aerobatics/Van Putte Continued page 18 compete pattern contests drive still look contest trail long time come Periodically receive letters ouestions Winning Ideas FOURMOST FUEL MANIFOLD TO SERVO -V VFUEL LINE[J4flJ J44FUEL SHUT OFF l Fuel Fitting Set Manifold Provides ConvenientCan Used Control FuelSize IDPRICE p125 Method Tank Filling Draining andFlow Starting1 Tee 2 Elbows 1 Pen Bladder Tee PrimingPositive Airborn Shutoft 510PRICE 95ePRICE 350 AND 5 00STRUT FAIRINGS Comes two 23 Lengths cockpit fl CoamingTwo Sizes 510Yor 0 Large Fuel Fitting Set / Size 1D PRICE 150 Packaged 2 Ft SizePRICE1 Tee 1 Elbow 1 Union 1 Plug PRICE 5195/pkg2 lengthseitlir size p225eats Made Froii FiVei Paal Poiyeiiyie,o Send SASE Complete Information FIJUflUVUJOI 4040 24th Ave Forest Grove OR 97116 PRODUCTS Phone 503 357-2732 NEW ZLIN Z5OL AEROBATIC QUARTER SCALE MODEL ENGINE 90 WINGSPAN 60 CONSTRUCTION Foam Wing a Fuselage Tail WING AREA 1122 sq FLYING WEIGHT 10 11 lbs Fiberglas Cowl 3116 Aluminium Landing Gear OHIO SUPERSTAR MODEL PRODUCTS INC 5630 Cherokee Drive Canton OH 44720 Ive answered earlier column Some have answered privately sufficient general interest warrant reprint fresh answer like include column Such case letter Paul Niner member Prince Georges June 1980 105 Van Puttes spectrum models includes first successful RC canard aircraft Designed Ron students Air Force Institute Technology built Ron first flew March 1966 Plane left looks like Fubar 36 caused sensation 1976 Nationals Dayton OH flewthis Zonker40 canard RC Pattern Craft lathe creation Milt Sanders Charlie Bair 58i/s span OS Max 4OFSR power Prop Tornado 106 nylon pusher THE CHOICE IS YOURS. Whether perfer ence Wood Fiber glas field caddys Youll get quality AerotrendTested reccomended ROM MAN FM magazines flyin Box right made super durable fiber glas shipped comple tely assembled storage bins flip-up plane supports folding legs Wood boxes left offer similar range fea tures low low prices Both offered basic & deluxe models s kits Introducing SANDING STIX Now can easily sand hard-to-reach places SANDING STIX consist strip top quality 3M production sand paper mated straight flat surface handle strip 80 grit shaping two strips 150 grit fine sanding stick comes 12 rule reverse side 2 strips per pkg Retail $149 7#67kEND IN STOCK FOR IMMEDIATE SHIPMENT QUADRAS $8995 QUADRA REPAIR- $1000 plus Darts Jim Messers ERCOUPE KIT- $19995* Concepts BIG FLEET KIT- $17995* Barkleys TIGER MOTH KIT- S22995* *includes FREE Du-Bro Wheels -SCALE PLANS FOR QUADRA ERCOUPE SKYBOLT- $2000 Ca SUPER STEARMAN- $495 ZINGER & TOP FLITE PROPS- 10% off BALSA & SPRUCE sIzes- 45% off COCKPIT KIT Ercoupe- $1500 Stearman $1800 Fleet- $1800 RADIAL ENG INESfor Fleet- $3000 COVERITE 15 rolls - 20% off 24-Hour Service $250 postage Send Bank Check Money Order JIM MESSERS QUALITY MODEL PRODUCTS 106 Valley View DrAllegany NY 14706 RC Club MD pre-med student Notre Dame Paul wrote past two years Ive growing interest canard concept aerodynamics tail ahead ofthe wing R VP am preliminary design process RC canard pattern airplane recall PGRC Club meeting several years ago presented film canard airplane students Annapolis successfully designed built flown Would possible obtain plans canard airplane tech nical information canard concept Boy does bring back memories students stability control course Air Force Institute Technology Annapolis sorry Paul 1966 tasked applying theory learned canard concept Together students designed built 6 foot span model flew offer other fine pro ducts too including BLUE LINE silicone products original thickerer tubing AQUA BLUE Gas & Diesel 1/4 scale Quadra type engines SQUEEZME HD Fuel Bulbs guaranteed lifel End-of-the-Line Nozzles Ti-rn-ups reusable ties other stainless steel accessories Send free catalog todayl 44 WProspect Street New Haven CT 06515 Ph 203 396- 3755 March 1966 displayed Toledo R/C Conference interest generated resulted article called Canard Pointers being published April 1968 American Aircraft Modeler magazine model eventually destroyed due battery pack failure during Air Force test project directed Don Lowe called airplane Ascender say slowly youll realize name new having used World War II canard fighter never produced quantity movie Paul saw compilation early flights Actually people experience RC canard pattern airplane design Charlie Bair Milt Sanders designed aircraft called Zonker Milt flew airplane 1976 Nats Dayton Ohio article airplane published March 1977 issued Model Aviation produced kit may still available Charlie Miltlet hear Now back technical information canard jrpj-aft TMeny euJe thiik tnat canard design tricky airplanes inherently unstable definitely true stable airplanes ever flew canard design true improper center mass location and/or insufficient consideration direc tional stability will cause nasty airplane thats fault canard concept finding proper center mass first consideration location aerodynamic center wing sorts cook book techniques best Ive found X equation Figure 1 Also calcu late 5 wing panel area later use Next aerodynamic center horizontal stabil izer determined same way using Figure 1 again numbers corresponding stabilizer Again calculate S time being stabilizer panel area will note no mention has made far canard design being considered fact end discussion will have two techniques center mass calculation corresponding either conventional canard aircraft difference between two equations will single minus sign term factor three another term Determine distance between aero dynamic centers wing horizontal stabilizer locate proper center mass shown Figure 2 using P equation center mass location guarantees aircraft will statically stable pitch After test flights have made may desirable move center mass toward rear airplane order improve pitch response aircraft second part successful canard aircraft design provide adequate directional stability canard aircraft often desirable put vertical fins tips relatively long swept wings rather installing large vertical fin fuselage Again using Figure 1 aero dynamic center location vertical fins calculated Also determine 5 now being vertical fin area V equation Figure 3 will tell vertical fins right size V about equal youre good shape its greater vertical fins too small Conversely V less vertical fins too big have adjust vertical fin area redo aerodynamic center calculation redetermine V until comes out about way V equation assumes have two vertical fins have shoot fora value two V Thats really preliminary canard aircraft design both steps major hurdles way success course theres no guar antee center mass design will end up calculations say its supposed However theres nothing new about situation conventional airplanes either ofyou werent really interested canard design interested deter mination proper center mass location conventional aircraft have treat you make calculations wing horizontal stabilizer using Figure 1 can go directly calculation proper center mass conventional aircraft using Figure 4 Next months feature will about prepare first contest Ron Van Putte 12 Connie Drive Shalimar FL 32579 106 Model Aviation r Woody $4995 Flyin Box $8995 BARRONS S XLE C SS IC S PLANS & CONSTR MANUAL Curtiss Hawk P6E Stinson Reliant SR9 1/4SCALE 9455P $2250 5AscALE 1205P $1500 25CALE 63SPAN $1250 5CALE R4SPAN $1500 3SCALE 471/45p$1050 IY2SCALF 435PAN $1250 Curtiss FIIC2 Curtiss Gulfhawk IA SCALE 945SP $3000 1MsCALE S45SP $3000 25CALE 03SP SISOO ISCALE 635P $1500 PLEASE ADD $200 FORP/H OUtS SEND $100 WR TE FOR MA L R NFORMAY 0N NCLUDE$ 00CATALOGE FOR CATA LOGE 1213 HOLLY SPRING LANE GRAND BLANC Mu 4R430
Edition: Model Aviation - 1980/06
Page Numbers: 18, 105, 106
SPORT AEROBATICS Ron Van Putte AS sat down write column realized five years ago first column sent Model nation During first column introduced myself described plans future occurred current readers never read first column appropriate update situation anniversary am aeronautical engineer degree Purdue University two degrees D--TH T FIG 1 AC 6 B 2 I-RT T1D J3 RT University Michigan 1959 1979 officer Air Force After retirement six month mandatory waiting period federal regulation returned job left Air Force Armament Laboratory Civil Service employee time work involves analyzing effects new weapons aircraft carry vice versa involvement fascinating hobby began college freshman 1954 has continued since several delays college During last 26 years have flown wide spectrum radio/aircraft/engine combina tions days Ill publish picture first radio system featured home built ground-based transmitter eleven foot antenna ECE vacuum tube receiver Bonner SN escapement two 22 volt four lV2 volt batteries Despite relative crudity high weight unreliability radio system great flights Harold deBolts Kitten airplanes never idea advances electronics would produce kind radios have today long time ago sat down listed airplanes Ive owned surprised discover average about airplane year hobby Included list deBolt Sonic Cruiser Viscount two Goldberg Senior LSTAILI WING -T L \ RT AC B FIG 3 F 385 WING IOOFS TAIL Falcons Midwest Esquire Lanier P-s 1 Bridi Kaos 60 Du-Bro Cherokee Arrow Beachcomber Intruder Andrews Trainermaster Phoenix III Phoenix V two Phoenix VIs Phoenix VIII Once involved RC pattern competition hooked first pattern contest Indianapolis Indiana 1966 Senior Falcon demolished maneuver called Scrambled Eight overhead eight half up right half inverted Youd think that would have end pattern flying career encouraged good friend named Don Lowe Over years Don has developed World Class pattern flier serves model kind flier want hope people can see some smooth Lowe style way Phoenix flies Last fall moved up after four years Advanced now fly Expert pattern fair-togood degree competence contests throughout Southeastern states Once get Figure M Half Rolls Eight Point Roll sorted Out scores will improve competitive drive has continued undiminished over years sweaty palms shaking knees pound ing heart routine repeats itself time step flight line contest will continue Continued page 105 FIG 2 CGAC h-rH FIG 4 AC CG II 12 P LSTAIL _ R 4-RTT 3SWING15RT 18 Model Aviation wheel courseas realistically full scale cousins Hegi showed 15 scale ASWl5 larger scale types fuselage epoxy molded wing balsa covered foam should further pointed out although models carry proud price tag quality top notch degree completion just short adding finishing touches Two manu facturers kept drool factor high Wik Wanitschek Wanitscheks line includes LS-l Club LS-3-l 7 LS-1 375 meters span LS-3 425 meters Others line include Jantar 2 span 41 meters 15 scale An HP-l 8 scale 14 375 meters span Jantar 1 also 14 scale bird span 475 meters Built-up wings keep cost down Price 43160 DM Wik showed sailplane real looking full scale version should built Its called Condor sports rudder elevator ailerons trailing edge speed brakes However best show 14 Astir C S-77 15 Twin Astir get nod also complete point installing spoilers ailerons shaped cut out hardware provided Cost large scale birds Anywhere 250 600 dollars Worth Yes might hard justifying cost yourself models worth price time worth thing its certain couldnt build scratch less Availability Contact Jerry Nelson Midwest Model Supply 1354 Naper yule Drive Romeo ville IL 60441 Phone 312 759-1955 Jerry also spent much time various sailplane booths both came away quite impressed quality big birds Another thing agreed week wasnt long enough still few bratwursts left Dan Pruss RA 2 Box 490 Plainfleld IL 60544 RC Aerobatics/Van Putte Continued page 18 compete pattern contests drive still look contest trail long time come Periodically receive letters ouestions Winning Ideas FOURMOST FUEL MANIFOLD TO SERVO -V VFUEL LINE[J4flJ J44FUEL SHUT OFF l Fuel Fitting Set Manifold Provides ConvenientCan Used Control FuelSize IDPRICE p125 Method Tank Filling Draining andFlow Starting1 Tee 2 Elbows 1 Pen Bladder Tee PrimingPositive Airborn Shutoft 510PRICE 95ePRICE 350 AND 5 00STRUT FAIRINGS Comes two 23 Lengths cockpit fl CoamingTwo Sizes 510Yor 0 Large Fuel Fitting Set / Size 1D PRICE 150 Packaged 2 Ft SizePRICE1 Tee 1 Elbow 1 Union 1 Plug PRICE 5195/pkg2 lengthseitlir size p225eats Made Froii FiVei Paal Poiyeiiyie,o Send SASE Complete Information FIJUflUVUJOI 4040 24th Ave Forest Grove OR 97116 PRODUCTS Phone 503 357-2732 NEW ZLIN Z5OL AEROBATIC QUARTER SCALE MODEL ENGINE 90 WINGSPAN 60 CONSTRUCTION Foam Wing a Fuselage Tail WING AREA 1122 sq FLYING WEIGHT 10 11 lbs Fiberglas Cowl 3116 Aluminium Landing Gear OHIO SUPERSTAR MODEL PRODUCTS INC 5630 Cherokee Drive Canton OH 44720 Ive answered earlier column Some have answered privately sufficient general interest warrant reprint fresh answer like include column Such case letter Paul Niner member Prince Georges June 1980 105 Van Puttes spectrum models includes first successful RC canard aircraft Designed Ron students Air Force Institute Technology built Ron first flew March 1966 Plane left looks like Fubar 36 caused sensation 1976 Nationals Dayton OH flewthis Zonker40 canard RC Pattern Craft lathe creation Milt Sanders Charlie Bair 58i/s span OS Max 4OFSR power Prop Tornado 106 nylon pusher THE CHOICE IS YOURS. Whether perfer ence Wood Fiber glas field caddys Youll get quality AerotrendTested reccomended ROM MAN FM magazines flyin Box right made super durable fiber glas shipped comple tely assembled storage bins flip-up plane supports folding legs Wood boxes left offer similar range fea tures low low prices Both offered basic & deluxe models s kits Introducing SANDING STIX Now can easily sand hard-to-reach places SANDING STIX consist strip top quality 3M production sand paper mated straight flat surface handle strip 80 grit shaping two strips 150 grit fine sanding stick comes 12 rule reverse side 2 strips per pkg Retail $149 7#67kEND IN STOCK FOR IMMEDIATE SHIPMENT QUADRAS $8995 QUADRA REPAIR- $1000 plus Darts Jim Messers ERCOUPE KIT- $19995* Concepts BIG FLEET KIT- $17995* Barkleys TIGER MOTH KIT- S22995* *includes FREE Du-Bro Wheels -SCALE PLANS FOR QUADRA ERCOUPE SKYBOLT- $2000 Ca SUPER STEARMAN- $495 ZINGER & TOP FLITE PROPS- 10% off BALSA & SPRUCE sIzes- 45% off COCKPIT KIT Ercoupe- $1500 Stearman $1800 Fleet- $1800 RADIAL ENG INESfor Fleet- $3000 COVERITE 15 rolls - 20% off 24-Hour Service $250 postage Send Bank Check Money Order JIM MESSERS QUALITY MODEL PRODUCTS 106 Valley View DrAllegany NY 14706 RC Club MD pre-med student Notre Dame Paul wrote past two years Ive growing interest canard concept aerodynamics tail ahead ofthe wing R VP am preliminary design process RC canard pattern airplane recall PGRC Club meeting several years ago presented film canard airplane students Annapolis successfully designed built flown Would possible obtain plans canard airplane tech nical information canard concept Boy does bring back memories students stability control course Air Force Institute Technology Annapolis sorry Paul 1966 tasked applying theory learned canard concept Together students designed built 6 foot span model flew offer other fine pro ducts too including BLUE LINE silicone products original thickerer tubing AQUA BLUE Gas & Diesel 1/4 scale Quadra type engines SQUEEZME HD Fuel Bulbs guaranteed lifel End-of-the-Line Nozzles Ti-rn-ups reusable ties other stainless steel accessories Send free catalog todayl 44 WProspect Street New Haven CT 06515 Ph 203 396- 3755 March 1966 displayed Toledo R/C Conference interest generated resulted article called Canard Pointers being published April 1968 American Aircraft Modeler magazine model eventually destroyed due battery pack failure during Air Force test project directed Don Lowe called airplane Ascender say slowly youll realize name new having used World War II canard fighter never produced quantity movie Paul saw compilation early flights Actually people experience RC canard pattern airplane design Charlie Bair Milt Sanders designed aircraft called Zonker Milt flew airplane 1976 Nats Dayton Ohio article airplane published March 1977 issued Model Aviation produced kit may still available Charlie Miltlet hear Now back technical information canard jrpj-aft TMeny euJe thiik tnat canard design tricky airplanes inherently unstable definitely true stable airplanes ever flew canard design true improper center mass location and/or insufficient consideration direc tional stability will cause nasty airplane thats fault canard concept finding proper center mass first consideration location aerodynamic center wing sorts cook book techniques best Ive found X equation Figure 1 Also calcu late 5 wing panel area later use Next aerodynamic center horizontal stabil izer determined same way using Figure 1 again numbers corresponding stabilizer Again calculate S time being stabilizer panel area will note no mention has made far canard design being considered fact end discussion will have two techniques center mass calculation corresponding either conventional canard aircraft difference between two equations will single minus sign term factor three another term Determine distance between aero dynamic centers wing horizontal stabilizer locate proper center mass shown Figure 2 using P equation center mass location guarantees aircraft will statically stable pitch After test flights have made may desirable move center mass toward rear airplane order improve pitch response aircraft second part successful canard aircraft design provide adequate directional stability canard aircraft often desirable put vertical fins tips relatively long swept wings rather installing large vertical fin fuselage Again using Figure 1 aero dynamic center location vertical fins calculated Also determine 5 now being vertical fin area V equation Figure 3 will tell vertical fins right size V about equal youre good shape its greater vertical fins too small Conversely V less vertical fins too big have adjust vertical fin area redo aerodynamic center calculation redetermine V until comes out about way V equation assumes have two vertical fins have shoot fora value two V Thats really preliminary canard aircraft design both steps major hurdles way success course theres no guar antee center mass design will end up calculations say its supposed However theres nothing new about situation conventional airplanes either ofyou werent really interested canard design interested deter mination proper center mass location conventional aircraft have treat you make calculations wing horizontal stabilizer using Figure 1 can go directly calculation proper center mass conventional aircraft using Figure 4 Next months feature will about prepare first contest Ron Van Putte 12 Connie Drive Shalimar FL 32579 106 Model Aviation r Woody $4995 Flyin Box $8995 BARRONS S XLE C SS IC S PLANS & CONSTR MANUAL Curtiss Hawk P6E Stinson Reliant SR9 1/4SCALE 9455P $2250 5AscALE 1205P $1500 25CALE 63SPAN $1250 5CALE R4SPAN $1500 3SCALE 471/45p$1050 IY2SCALF 435PAN $1250 Curtiss FIIC2 Curtiss Gulfhawk IA SCALE 945SP $3000 1MsCALE S45SP $3000 25CALE 03SP SISOO ISCALE 635P $1500 PLEASE ADD $200 FORP/H OUtS SEND $100 WR TE FOR MA L R NFORMAY 0N NCLUDE$ 00CATALOGE FOR CATA LOGE 1213 HOLLY SPRING LANE GRAND BLANC Mu 4R430
Edition: Model Aviation - 1980/06
Page Numbers: 18, 105, 106
SPORT AEROBATICS Ron Van Putte AS sat down write column realized five years ago first column sent Model nation During first column introduced myself described plans future occurred current readers never read first column appropriate update situation anniversary am aeronautical engineer degree Purdue University two degrees D--TH T FIG 1 AC 6 B 2 I-RT T1D J3 RT University Michigan 1959 1979 officer Air Force After retirement six month mandatory waiting period federal regulation returned job left Air Force Armament Laboratory Civil Service employee time work involves analyzing effects new weapons aircraft carry vice versa involvement fascinating hobby began college freshman 1954 has continued since several delays college During last 26 years have flown wide spectrum radio/aircraft/engine combina tions days Ill publish picture first radio system featured home built ground-based transmitter eleven foot antenna ECE vacuum tube receiver Bonner SN escapement two 22 volt four lV2 volt batteries Despite relative crudity high weight unreliability radio system great flights Harold deBolts Kitten airplanes never idea advances electronics would produce kind radios have today long time ago sat down listed airplanes Ive owned surprised discover average about airplane year hobby Included list deBolt Sonic Cruiser Viscount two Goldberg Senior LSTAILI WING -T L \ RT AC B FIG 3 F 385 WING IOOFS TAIL Falcons Midwest Esquire Lanier P-s 1 Bridi Kaos 60 Du-Bro Cherokee Arrow Beachcomber Intruder Andrews Trainermaster Phoenix III Phoenix V two Phoenix VIs Phoenix VIII Once involved RC pattern competition hooked first pattern contest Indianapolis Indiana 1966 Senior Falcon demolished maneuver called Scrambled Eight overhead eight half up right half inverted Youd think that would have end pattern flying career encouraged good friend named Don Lowe Over years Don has developed World Class pattern flier serves model kind flier want hope people can see some smooth Lowe style way Phoenix flies Last fall moved up after four years Advanced now fly Expert pattern fair-togood degree competence contests throughout Southeastern states Once get Figure M Half Rolls Eight Point Roll sorted Out scores will improve competitive drive has continued undiminished over years sweaty palms shaking knees pound ing heart routine repeats itself time step flight line contest will continue Continued page 105 FIG 2 CGAC h-rH FIG 4 AC CG II 12 P LSTAIL _ R 4-RTT 3SWING15RT 18 Model Aviation wheel courseas realistically full scale cousins Hegi showed 15 scale ASWl5 larger scale types fuselage epoxy molded wing balsa covered foam should further pointed out although models carry proud price tag quality top notch degree completion just short adding finishing touches Two manu facturers kept drool factor high Wik Wanitschek Wanitscheks line includes LS-l Club LS-3-l 7 LS-1 375 meters span LS-3 425 meters Others line include Jantar 2 span 41 meters 15 scale An HP-l 8 scale 14 375 meters span Jantar 1 also 14 scale bird span 475 meters Built-up wings keep cost down Price 43160 DM Wik showed sailplane real looking full scale version should built Its called Condor sports rudder elevator ailerons trailing edge speed brakes However best show 14 Astir C S-77 15 Twin Astir get nod also complete point installing spoilers ailerons shaped cut out hardware provided Cost large scale birds Anywhere 250 600 dollars Worth Yes might hard justifying cost yourself models worth price time worth thing its certain couldnt build scratch less Availability Contact Jerry Nelson Midwest Model Supply 1354 Naper yule Drive Romeo ville IL 60441 Phone 312 759-1955 Jerry also spent much time various sailplane booths both came away quite impressed quality big birds Another thing agreed week wasnt long enough still few bratwursts left Dan Pruss RA 2 Box 490 Plainfleld IL 60544 RC Aerobatics/Van Putte Continued page 18 compete pattern contests drive still look contest trail long time come Periodically receive letters ouestions Winning Ideas FOURMOST FUEL MANIFOLD TO SERVO -V VFUEL LINE[J4flJ J44FUEL SHUT OFF l Fuel Fitting Set Manifold Provides ConvenientCan Used Control FuelSize IDPRICE p125 Method Tank Filling Draining andFlow Starting1 Tee 2 Elbows 1 Pen Bladder Tee PrimingPositive Airborn Shutoft 510PRICE 95ePRICE 350 AND 5 00STRUT FAIRINGS Comes two 23 Lengths cockpit fl CoamingTwo Sizes 510Yor 0 Large Fuel Fitting Set / Size 1D PRICE 150 Packaged 2 Ft SizePRICE1 Tee 1 Elbow 1 Union 1 Plug PRICE 5195/pkg2 lengthseitlir size p225eats Made Froii FiVei Paal Poiyeiiyie,o Send SASE Complete Information FIJUflUVUJOI 4040 24th Ave Forest Grove OR 97116 PRODUCTS Phone 503 357-2732 NEW ZLIN Z5OL AEROBATIC QUARTER SCALE MODEL ENGINE 90 WINGSPAN 60 CONSTRUCTION Foam Wing a Fuselage Tail WING AREA 1122 sq FLYING WEIGHT 10 11 lbs Fiberglas Cowl 3116 Aluminium Landing Gear OHIO SUPERSTAR MODEL PRODUCTS INC 5630 Cherokee Drive Canton OH 44720 Ive answered earlier column Some have answered privately sufficient general interest warrant reprint fresh answer like include column Such case letter Paul Niner member Prince Georges June 1980 105 Van Puttes spectrum models includes first successful RC canard aircraft Designed Ron students Air Force Institute Technology built Ron first flew March 1966 Plane left looks like Fubar 36 caused sensation 1976 Nationals Dayton OH flewthis Zonker40 canard RC Pattern Craft lathe creation Milt Sanders Charlie Bair 58i/s span OS Max 4OFSR power Prop Tornado 106 nylon pusher THE CHOICE IS YOURS. Whether perfer ence Wood Fiber glas field caddys Youll get quality AerotrendTested reccomended ROM MAN FM magazines flyin Box right made super durable fiber glas shipped comple tely assembled storage bins flip-up plane supports folding legs Wood boxes left offer similar range fea tures low low prices Both offered basic & deluxe models s kits Introducing SANDING STIX Now can easily sand hard-to-reach places SANDING STIX consist strip top quality 3M production sand paper mated straight flat surface handle strip 80 grit shaping two strips 150 grit fine sanding stick comes 12 rule reverse side 2 strips per pkg Retail $149 7#67kEND IN STOCK FOR IMMEDIATE SHIPMENT QUADRAS $8995 QUADRA REPAIR- $1000 plus Darts Jim Messers ERCOUPE KIT- $19995* Concepts BIG FLEET KIT- $17995* Barkleys TIGER MOTH KIT- S22995* *includes FREE Du-Bro Wheels -SCALE PLANS FOR QUADRA ERCOUPE SKYBOLT- $2000 Ca SUPER STEARMAN- $495 ZINGER & TOP FLITE PROPS- 10% off BALSA & SPRUCE sIzes- 45% off COCKPIT KIT Ercoupe- $1500 Stearman $1800 Fleet- $1800 RADIAL ENG INESfor Fleet- $3000 COVERITE 15 rolls - 20% off 24-Hour Service $250 postage Send Bank Check Money Order JIM MESSERS QUALITY MODEL PRODUCTS 106 Valley View DrAllegany NY 14706 RC Club MD pre-med student Notre Dame Paul wrote past two years Ive growing interest canard concept aerodynamics tail ahead ofthe wing R VP am preliminary design process RC canard pattern airplane recall PGRC Club meeting several years ago presented film canard airplane students Annapolis successfully designed built flown Would possible obtain plans canard airplane tech nical information canard concept Boy does bring back memories students stability control course Air Force Institute Technology Annapolis sorry Paul 1966 tasked applying theory learned canard concept Together students designed built 6 foot span model flew offer other fine pro ducts too including BLUE LINE silicone products original thickerer tubing AQUA BLUE Gas & Diesel 1/4 scale Quadra type engines SQUEEZME HD Fuel Bulbs guaranteed lifel End-of-the-Line Nozzles Ti-rn-ups reusable ties other stainless steel accessories Send free catalog todayl 44 WProspect Street New Haven CT 06515 Ph 203 396- 3755 March 1966 displayed Toledo R/C Conference interest generated resulted article called Canard Pointers being published April 1968 American Aircraft Modeler magazine model eventually destroyed due battery pack failure during Air Force test project directed Don Lowe called airplane Ascender say slowly youll realize name new having used World War II canard fighter never produced quantity movie Paul saw compilation early flights Actually people experience RC canard pattern airplane design Charlie Bair Milt Sanders designed aircraft called Zonker Milt flew airplane 1976 Nats Dayton Ohio article airplane published March 1977 issued Model Aviation produced kit may still available Charlie Miltlet hear Now back technical information canard jrpj-aft TMeny euJe thiik tnat canard design tricky airplanes inherently unstable definitely true stable airplanes ever flew canard design true improper center mass location and/or insufficient consideration direc tional stability will cause nasty airplane thats fault canard concept finding proper center mass first consideration location aerodynamic center wing sorts cook book techniques best Ive found X equation Figure 1 Also calcu late 5 wing panel area later use Next aerodynamic center horizontal stabil izer determined same way using Figure 1 again numbers corresponding stabilizer Again calculate S time being stabilizer panel area will note no mention has made far canard design being considered fact end discussion will have two techniques center mass calculation corresponding either conventional canard aircraft difference between two equations will single minus sign term factor three another term Determine distance between aero dynamic centers wing horizontal stabilizer locate proper center mass shown Figure 2 using P equation center mass location guarantees aircraft will statically stable pitch After test flights have made may desirable move center mass toward rear airplane order improve pitch response aircraft second part successful canard aircraft design provide adequate directional stability canard aircraft often desirable put vertical fins tips relatively long swept wings rather installing large vertical fin fuselage Again using Figure 1 aero dynamic center location vertical fins calculated Also determine 5 now being vertical fin area V equation Figure 3 will tell vertical fins right size V about equal youre good shape its greater vertical fins too small Conversely V less vertical fins too big have adjust vertical fin area redo aerodynamic center calculation redetermine V until comes out about way V equation assumes have two vertical fins have shoot fora value two V Thats really preliminary canard aircraft design both steps major hurdles way success course theres no guar antee center mass design will end up calculations say its supposed However theres nothing new about situation conventional airplanes either ofyou werent really interested canard design interested deter mination proper center mass location conventional aircraft have treat you make calculations wing horizontal stabilizer using Figure 1 can go directly calculation proper center mass conventional aircraft using Figure 4 Next months feature will about prepare first contest Ron Van Putte 12 Connie Drive Shalimar FL 32579 106 Model Aviation r Woody $4995 Flyin Box $8995 BARRONS S XLE C SS IC S PLANS & CONSTR MANUAL Curtiss Hawk P6E Stinson Reliant SR9 1/4SCALE 9455P $2250 5AscALE 1205P $1500 25CALE 63SPAN $1250 5CALE R4SPAN $1500 3SCALE 471/45p$1050 IY2SCALF 435PAN $1250 Curtiss FIIC2 Curtiss Gulfhawk IA SCALE 945SP $3000 1MsCALE S45SP $3000 25CALE 03SP SISOO ISCALE 635P $1500 PLEASE ADD $200 FORP/H OUtS SEND $100 WR TE FOR MA L R NFORMAY 0N NCLUDE$ 00CATALOGE FOR CATA LOGE 1213 HOLLY SPRING LANE GRAND BLANC Mu 4R430