IIII IiII NOTEWINGS AREIiiUPPER AND LOWER WINGS FLAT WITHOUT DIHEDRALI SIMILAR IIII IIH EXCEPT IIu OUTER PIECES SHOWN COVER TOP SURFACESII DASHED LINES ONLY WITH LIGHT TISSUEII 4 REQUIRED FOR LOWER II II DO NOT SHRINKII II WING ONLY II ii II II II II II iiII WING 2 REQUIRED7 WING SPREADER p 3 REQUIRED FILE AWAY PLASTIC FOR MORE RUBBER MOTOR CLEARANCE M PROPELLER TYPING PAPER RUDDER WI ASSEMBLY LANDING GEAR AND FUSELAGE ARE FROM NORTH PACIFIC STREEK iv FIN/ RUDDER INVERTED VIEW OF LOWER WING ION SHOWING MOUNTS 1/4 x 1/16 WING MOUNT 2 REQUIRED SCOTCH TAPE STA B IL Z ER AWAY SHADED PORTION OF FUSELAGE STICK AND DISCARD ALL FRAME STRUCTURE IS 1/16 SQUARE BALSA Boxy Bipe BY BILL HANNAN HERES LITTLE two-winger both easy inexpensive construct fuselage propeller assembly land ing gear North Pacific Sleek Streek few items scrap box should complete project model somewhat unusual employs absolutely no dihedral Instead lateral stability assured vertical curtain surfaces separating wings glider Frank Scott/Jiri Kalina featur ing system appeared February Model viation idea originated early aviation history having advocated Aus tralian Lawrence Hargrave inventor box kite during 1893 Credit also due F W Lanchester England flew model gliders vertical stabilizing vanes during early 1900s first constructor apply concept fullsize aircraft appears have Gabriel Voisin during 1905 Santos-Dumont also employed wing curtains six em hedged bets using dihedral too Other early experimenters tried idea include Louis Bleriot Henri Farman Interestingly pioneer model aeroplanes flew dihedral vertical curtains either majority seem have gliders contrarotat ing propeller-driven twin-pushers subject de-stabilizing effects single propeller too number successful free-flight scale models flown dihedral cheated bit using wing-tip washout pendulum controls few years ago Walt Mooney published series models revived vertical curtain theory new form using oversize profile pilot carica tures lateral stabilization Dihedral joints have always source difficulty beginning builders Borrowing early days flight ROG uses interplane curtains instead dihedral Bill Hannan jxT often failure-prone case crash So heres chance try well-proven seldom seen alternative have some fun process First purchase North Pacific Sleek Streek ready-to-fly model may well fly Streek parts needed model apt damaged process Other materials required include Sev eral 1/16 sq balsa strips lightweight col ored tissue paper small section 1/16 sheet balsa Note would possible laminate 1/16 sq strips purpose choice glue plastic wrap Tools suggested include Single-edge razor blade sharp modeling knife con jinued page 88 February 1977 53 its Sleek Streek prop spinning madly distinctive Boxy Bipe flits camera after takeoff triplane version flies well Color tissue covering doped water shrunk Guide strips allow wing movement balanceScotch tape shown plan Glue cement balsa knife single-edge razor bladeand maybe small hammer tap pins work boardthe tools strength have experience lieve sharp corners whether painted Monokoted stay defined through sorts handling landings Although beefed up fuselage wont make plane fly hetter added strength should let breathe easier dur ing landings turn out less smooth Theres new full-size sailplane organi zation should interest scale enthusiasts Its Vintage Sail plane Assoc 6053 25th Road N Arling ton VA 22207 TRY SCALE ACCESSORIES KITS INE GUN KITS ENGINE KITS & CYLINDERS PILOTS LS PROPS & HANGERS SPINNERS INGS CANOPIES K COWLS ASK FOR OUR PRODUCTS AT YOUR DEALER OR SEND 25 FOR OUR CATALOG WILLIAMS BROS DEPT M 181 PAWNEE ST SAN MARCOS CA 92069 Dues $500 per year quarterly publication deals name imiilies vintage sailplanes Doc Hall sez its must youre interested old time scale Dan Pruss Ri 2 Box 490 Plainfield IL 60544 Boxy Bipe/Hannan continued page 53 pointed blade scissors common straight pins Construction soft building surface such insula tion board pins may easily pushed recommended Cover fullsize plan plastic wrap protect glue Wings Construct wings 1/16 sq balsa strips cutting longest pieces first waste will reduced Note upper lower wings almost quite alike lower wing has two extra members center section shown plan dotted lines Se cure strips straight pins drying X pins over strips rather piercing strips might weaken have new pin-clamps pin-down devices may used easily Allow glued joints dry completely before removing wings building board Tailplanes Wing Spreaders stabilizer rudder wing spreaders constructed same manner wings Try make three wing spread ers nearly alike possible Fuselage modification Sleek Streek fuselage consists cutting portion rear indicated plan essential operation serves lighten tail end creased efficiency Covering Only tops wings stabilizer covered tissue side rudder wing spreaders Note outer sides tip wing spreaders should covered best appearance Flight performance will suffer goof however tissue may applied clear dope adhesive perhaps easier employ white glue has slightly thinned water applied pointed brush use excessive amounts wood warp ing may occur tissue adhesive has dried trim off excess using sharp razor blade water-shrink dope tissue could easily gener ate warps Colors Although color tissue could used chose red white blue white stars Uncle Sam cut 88 Model Aviation RC Soaring continued ordinary white typing paper pointed modeling knife glued posi tion Assembly Cement stabilizer onto top rear fuselage being careful properly square viewed both rear top Next add rudder lining up accurately center stabi lizer trim tab Pin weight lower wing flat building board glue wing spreaders time tallest edges front wing since determine incidence Prop spread ers vertical position drying using sugar cubes dice something similar Add top wing adjusting spread ers needed line up properly Work carefully assure precise alignment complete wing assembly called cellule dry turn upside down glue wing mount members have cut 1/16 sheet should spaced snug fit either side fuselage too tight use folded piece coarse sandpaper inner sides too loose glue strip typing paper inner side mount wing glued may secured strip scotch tape until its proper position has determined Flying Try windless day pos sible test-fly over grass weeds just case Glide model few times shoulder height dives slide wing cellule forward slightly stalls slide assembly aft Next try few turns propeller launch gently throw Watch flight path carefully reshifting wing cellule required achieve smooth descent Increase number hand winds re peat model turns excessively side counter bending paper rud der tab opposite turn extreme cases tiny amount clay ballast may need added wing tip opposite di rection turn Gradually increase number propeller winds until model can safely handle full row knots rather peculiar skidding action model right after launch character istic stabilizing system no cause concern Up point standard North Pacific gum band has employed can replaced longer lubed rubber motor greater endurance ever longer motor may have tendency bunch up propeller hook creat ing prop-stopping bind carefully filing away clearance plastic propeller support bearing shown drawing problem can reduced Ex periment different motor sizes loop lengths use 2-mm size slow flights pier ROG starts better climb Postlude Since model construct ed several different versions have built Russ Barrera Warren Shipp came up triplane have exhibited similar stable flight characteris tics according newspaper clipping sent mother both Boeing Douglas engineers giving serious con sideration vertical tips call winglets Truly history repeats itself FF Old-Timers/Haught continued page 47 operating characteristics engines easy handle overly sensitive Response needle valve good Both engines very insensitive timer adjustments felt engines less flexibility over wide rpm range original ignition engines suspect related porting being designed glow operation higher rpms main purpose wanting test engines compare power output some familiar original ig nition engines similar displacement get information out readers assist choosing suitable powerplants design choice conversions put out power could create uncontrollable best difficult manage beast overpower ing model direct displacement com parison plan compare similar displacement engines using same prop fuel under same operating condi tions Familiar engines good condition used norms results shown accompanying table Both new engines tested performed very good well worth considera tion may reach Otto 77 Products 17119 So Harvard Blvd Gardena CA 90247 Bruce operates Chandler Engineer ing Company 7858 Farralone Ave Cano ga Park CA 91304 several other good craftsmen offering conversion work variety engines well few replica engines being manufactured provide flying engines Dont let elegant old-timer go unbuilt lack suitable powerplant proably bears mention within old-timer movement today rages Great Engine Controversy going hassle whether conver sions and/or replica engines should al lowed competition columnist sim ply doesnt want become involved issue nor feel Model Aviation could benefit anyway Otto Bernhardt sent along sample Blendzall engine try understand gasoline solu ble castor oil Otto suggested could mixed either gasoline Coleman fuel Hav ing never used Coleman fuel engines mixed Blendzall As Otto promised Blendzall fuel burned very 1st RC Masters Class 1st RC Advanced 1st RC Novice 1st Formula Pylon 1st Quarter Midget Pylon 1st CL Stunt Open 1st CL Stunt Senior 1st CL Stunt Junior WORLD CHAMPIONSHIP 1976 HOLLAND 1st 2nd 3rd CL STUNT MORE 1976 NATIONALS 1st CL Combat Op & Sr 1st CL Slow Comb Op & Sr 1st CL Carrier II Op Jr Sr 1st CL Carrier Sr Jr 1st CL Class D Speed Open 1st CL Class C Speed Sr & Jr 1st CL Class B Speed Op& Sr 1st CL Cl ASpeedOpSrJr 1st CL Formula 40 Open 1st CL Class B Proto Jr 1st FF Class B Open 1st FF Class C Open HIGH PERFORMANCE * COMPETITION PROVEN * THIN RIGID BLADES OF HARD MAPLE WOOD * SUPSRBLY FINISHED COMPIETELY FUEL PROOF SPECIAL PRO SERIES 2 FOR RC-FREE FLIGHT CONTROL LINE DIAPITCHPRICE 5/3489 63489 733%4119 83%456129 94566% 77%139 104e7149 106W 8W149 1066W169 114677/ 7% 7% 8159 1166W169 hA67169 126179 125W179 1356219 1466249 1556309 164% 6389 W WIDE 6LADE 6W EXTRA WIDE SERIES 400 B FOR SPEED & RACING ADVANCED DESIGN NO 1 IN PYLON RACING LEADING SPEED RECORD HOLDER OF ALL TIMES RC PYLON RACING DIA PITCHPRICE 5% 3%4119 7 55%6129 7 5N 5%N 6N129 9% 6% 6% 7 7%7%169 9 6%77%169 CONTROL LINE SPEED& RACING DIA PITCHPRICE 4%6%7119 455%119 6788%129 77%10%11139 869149 89N 9%N149 8%77%149 912 13199 N NARROW February 1977 89 7 IIOUT-PERFORMS ALL OTHERS AT THE 1976 NATIONALS
Edition: Model Aviation - 1977/02
Page Numbers: 52, 53, 88, 89
IIII IiII NOTEWINGS AREIiiUPPER AND LOWER WINGS FLAT WITHOUT DIHEDRALI SIMILAR IIII IIH EXCEPT IIu OUTER PIECES SHOWN COVER TOP SURFACESII DASHED LINES ONLY WITH LIGHT TISSUEII 4 REQUIRED FOR LOWER II II DO NOT SHRINKII II WING ONLY II ii II II II II II iiII WING 2 REQUIRED7 WING SPREADER p 3 REQUIRED FILE AWAY PLASTIC FOR MORE RUBBER MOTOR CLEARANCE M PROPELLER TYPING PAPER RUDDER WI ASSEMBLY LANDING GEAR AND FUSELAGE ARE FROM NORTH PACIFIC STREEK iv FIN/ RUDDER INVERTED VIEW OF LOWER WING ION SHOWING MOUNTS 1/4 x 1/16 WING MOUNT 2 REQUIRED SCOTCH TAPE STA B IL Z ER AWAY SHADED PORTION OF FUSELAGE STICK AND DISCARD ALL FRAME STRUCTURE IS 1/16 SQUARE BALSA Boxy Bipe BY BILL HANNAN HERES LITTLE two-winger both easy inexpensive construct fuselage propeller assembly land ing gear North Pacific Sleek Streek few items scrap box should complete project model somewhat unusual employs absolutely no dihedral Instead lateral stability assured vertical curtain surfaces separating wings glider Frank Scott/Jiri Kalina featur ing system appeared February Model viation idea originated early aviation history having advocated Aus tralian Lawrence Hargrave inventor box kite during 1893 Credit also due F W Lanchester England flew model gliders vertical stabilizing vanes during early 1900s first constructor apply concept fullsize aircraft appears have Gabriel Voisin during 1905 Santos-Dumont also employed wing curtains six em hedged bets using dihedral too Other early experimenters tried idea include Louis Bleriot Henri Farman Interestingly pioneer model aeroplanes flew dihedral vertical curtains either majority seem have gliders contrarotat ing propeller-driven twin-pushers subject de-stabilizing effects single propeller too number successful free-flight scale models flown dihedral cheated bit using wing-tip washout pendulum controls few years ago Walt Mooney published series models revived vertical curtain theory new form using oversize profile pilot carica tures lateral stabilization Dihedral joints have always source difficulty beginning builders Borrowing early days flight ROG uses interplane curtains instead dihedral Bill Hannan jxT often failure-prone case crash So heres chance try well-proven seldom seen alternative have some fun process First purchase North Pacific Sleek Streek ready-to-fly model may well fly Streek parts needed model apt damaged process Other materials required include Sev eral 1/16 sq balsa strips lightweight col ored tissue paper small section 1/16 sheet balsa Note would possible laminate 1/16 sq strips purpose choice glue plastic wrap Tools suggested include Single-edge razor blade sharp modeling knife con jinued page 88 February 1977 53 its Sleek Streek prop spinning madly distinctive Boxy Bipe flits camera after takeoff triplane version flies well Color tissue covering doped water shrunk Guide strips allow wing movement balanceScotch tape shown plan Glue cement balsa knife single-edge razor bladeand maybe small hammer tap pins work boardthe tools strength have experience lieve sharp corners whether painted Monokoted stay defined through sorts handling landings Although beefed up fuselage wont make plane fly hetter added strength should let breathe easier dur ing landings turn out less smooth Theres new full-size sailplane organi zation should interest scale enthusiasts Its Vintage Sail plane Assoc 6053 25th Road N Arling ton VA 22207 TRY SCALE ACCESSORIES KITS INE GUN KITS ENGINE KITS & CYLINDERS PILOTS LS PROPS & HANGERS SPINNERS INGS CANOPIES K COWLS ASK FOR OUR PRODUCTS AT YOUR DEALER OR SEND 25 FOR OUR CATALOG WILLIAMS BROS DEPT M 181 PAWNEE ST SAN MARCOS CA 92069 Dues $500 per year quarterly publication deals name imiilies vintage sailplanes Doc Hall sez its must youre interested old time scale Dan Pruss Ri 2 Box 490 Plainfield IL 60544 Boxy Bipe/Hannan continued page 53 pointed blade scissors common straight pins Construction soft building surface such insula tion board pins may easily pushed recommended Cover fullsize plan plastic wrap protect glue Wings Construct wings 1/16 sq balsa strips cutting longest pieces first waste will reduced Note upper lower wings almost quite alike lower wing has two extra members center section shown plan dotted lines Se cure strips straight pins drying X pins over strips rather piercing strips might weaken have new pin-clamps pin-down devices may used easily Allow glued joints dry completely before removing wings building board Tailplanes Wing Spreaders stabilizer rudder wing spreaders constructed same manner wings Try make three wing spread ers nearly alike possible Fuselage modification Sleek Streek fuselage consists cutting portion rear indicated plan essential operation serves lighten tail end creased efficiency Covering Only tops wings stabilizer covered tissue side rudder wing spreaders Note outer sides tip wing spreaders should covered best appearance Flight performance will suffer goof however tissue may applied clear dope adhesive perhaps easier employ white glue has slightly thinned water applied pointed brush use excessive amounts wood warp ing may occur tissue adhesive has dried trim off excess using sharp razor blade water-shrink dope tissue could easily gener ate warps Colors Although color tissue could used chose red white blue white stars Uncle Sam cut 88 Model Aviation RC Soaring continued ordinary white typing paper pointed modeling knife glued posi tion Assembly Cement stabilizer onto top rear fuselage being careful properly square viewed both rear top Next add rudder lining up accurately center stabi lizer trim tab Pin weight lower wing flat building board glue wing spreaders time tallest edges front wing since determine incidence Prop spread ers vertical position drying using sugar cubes dice something similar Add top wing adjusting spread ers needed line up properly Work carefully assure precise alignment complete wing assembly called cellule dry turn upside down glue wing mount members have cut 1/16 sheet should spaced snug fit either side fuselage too tight use folded piece coarse sandpaper inner sides too loose glue strip typing paper inner side mount wing glued may secured strip scotch tape until its proper position has determined Flying Try windless day pos sible test-fly over grass weeds just case Glide model few times shoulder height dives slide wing cellule forward slightly stalls slide assembly aft Next try few turns propeller launch gently throw Watch flight path carefully reshifting wing cellule required achieve smooth descent Increase number hand winds re peat model turns excessively side counter bending paper rud der tab opposite turn extreme cases tiny amount clay ballast may need added wing tip opposite di rection turn Gradually increase number propeller winds until model can safely handle full row knots rather peculiar skidding action model right after launch character istic stabilizing system no cause concern Up point standard North Pacific gum band has employed can replaced longer lubed rubber motor greater endurance ever longer motor may have tendency bunch up propeller hook creat ing prop-stopping bind carefully filing away clearance plastic propeller support bearing shown drawing problem can reduced Ex periment different motor sizes loop lengths use 2-mm size slow flights pier ROG starts better climb Postlude Since model construct ed several different versions have built Russ Barrera Warren Shipp came up triplane have exhibited similar stable flight characteris tics according newspaper clipping sent mother both Boeing Douglas engineers giving serious con sideration vertical tips call winglets Truly history repeats itself FF Old-Timers/Haught continued page 47 operating characteristics engines easy handle overly sensitive Response needle valve good Both engines very insensitive timer adjustments felt engines less flexibility over wide rpm range original ignition engines suspect related porting being designed glow operation higher rpms main purpose wanting test engines compare power output some familiar original ig nition engines similar displacement get information out readers assist choosing suitable powerplants design choice conversions put out power could create uncontrollable best difficult manage beast overpower ing model direct displacement com parison plan compare similar displacement engines using same prop fuel under same operating condi tions Familiar engines good condition used norms results shown accompanying table Both new engines tested performed very good well worth considera tion may reach Otto 77 Products 17119 So Harvard Blvd Gardena CA 90247 Bruce operates Chandler Engineer ing Company 7858 Farralone Ave Cano ga Park CA 91304 several other good craftsmen offering conversion work variety engines well few replica engines being manufactured provide flying engines Dont let elegant old-timer go unbuilt lack suitable powerplant proably bears mention within old-timer movement today rages Great Engine Controversy going hassle whether conver sions and/or replica engines should al lowed competition columnist sim ply doesnt want become involved issue nor feel Model Aviation could benefit anyway Otto Bernhardt sent along sample Blendzall engine try understand gasoline solu ble castor oil Otto suggested could mixed either gasoline Coleman fuel Hav ing never used Coleman fuel engines mixed Blendzall As Otto promised Blendzall fuel burned very 1st RC Masters Class 1st RC Advanced 1st RC Novice 1st Formula Pylon 1st Quarter Midget Pylon 1st CL Stunt Open 1st CL Stunt Senior 1st CL Stunt Junior WORLD CHAMPIONSHIP 1976 HOLLAND 1st 2nd 3rd CL STUNT MORE 1976 NATIONALS 1st CL Combat Op & Sr 1st CL Slow Comb Op & Sr 1st CL Carrier II Op Jr Sr 1st CL Carrier Sr Jr 1st CL Class D Speed Open 1st CL Class C Speed Sr & Jr 1st CL Class B Speed Op& Sr 1st CL Cl ASpeedOpSrJr 1st CL Formula 40 Open 1st CL Class B Proto Jr 1st FF Class B Open 1st FF Class C Open HIGH PERFORMANCE * COMPETITION PROVEN * THIN RIGID BLADES OF HARD MAPLE WOOD * SUPSRBLY FINISHED COMPIETELY FUEL PROOF SPECIAL PRO SERIES 2 FOR RC-FREE FLIGHT CONTROL LINE DIAPITCHPRICE 5/3489 63489 733%4119 83%456129 94566% 77%139 104e7149 106W 8W149 1066W169 114677/ 7% 7% 8159 1166W169 hA67169 126179 125W179 1356219 1466249 1556309 164% 6389 W WIDE 6LADE 6W EXTRA WIDE SERIES 400 B FOR SPEED & RACING ADVANCED DESIGN NO 1 IN PYLON RACING LEADING SPEED RECORD HOLDER OF ALL TIMES RC PYLON RACING DIA PITCHPRICE 5% 3%4119 7 55%6129 7 5N 5%N 6N129 9% 6% 6% 7 7%7%169 9 6%77%169 CONTROL LINE SPEED& RACING DIA PITCHPRICE 4%6%7119 455%119 6788%129 77%10%11139 869149 89N 9%N149 8%77%149 912 13199 N NARROW February 1977 89 7 IIOUT-PERFORMS ALL OTHERS AT THE 1976 NATIONALS
Edition: Model Aviation - 1977/02
Page Numbers: 52, 53, 88, 89
IIII IiII NOTEWINGS AREIiiUPPER AND LOWER WINGS FLAT WITHOUT DIHEDRALI SIMILAR IIII IIH EXCEPT IIu OUTER PIECES SHOWN COVER TOP SURFACESII DASHED LINES ONLY WITH LIGHT TISSUEII 4 REQUIRED FOR LOWER II II DO NOT SHRINKII II WING ONLY II ii II II II II II iiII WING 2 REQUIRED7 WING SPREADER p 3 REQUIRED FILE AWAY PLASTIC FOR MORE RUBBER MOTOR CLEARANCE M PROPELLER TYPING PAPER RUDDER WI ASSEMBLY LANDING GEAR AND FUSELAGE ARE FROM NORTH PACIFIC STREEK iv FIN/ RUDDER INVERTED VIEW OF LOWER WING ION SHOWING MOUNTS 1/4 x 1/16 WING MOUNT 2 REQUIRED SCOTCH TAPE STA B IL Z ER AWAY SHADED PORTION OF FUSELAGE STICK AND DISCARD ALL FRAME STRUCTURE IS 1/16 SQUARE BALSA Boxy Bipe BY BILL HANNAN HERES LITTLE two-winger both easy inexpensive construct fuselage propeller assembly land ing gear North Pacific Sleek Streek few items scrap box should complete project model somewhat unusual employs absolutely no dihedral Instead lateral stability assured vertical curtain surfaces separating wings glider Frank Scott/Jiri Kalina featur ing system appeared February Model viation idea originated early aviation history having advocated Aus tralian Lawrence Hargrave inventor box kite during 1893 Credit also due F W Lanchester England flew model gliders vertical stabilizing vanes during early 1900s first constructor apply concept fullsize aircraft appears have Gabriel Voisin during 1905 Santos-Dumont also employed wing curtains six em hedged bets using dihedral too Other early experimenters tried idea include Louis Bleriot Henri Farman Interestingly pioneer model aeroplanes flew dihedral vertical curtains either majority seem have gliders contrarotat ing propeller-driven twin-pushers subject de-stabilizing effects single propeller too number successful free-flight scale models flown dihedral cheated bit using wing-tip washout pendulum controls few years ago Walt Mooney published series models revived vertical curtain theory new form using oversize profile pilot carica tures lateral stabilization Dihedral joints have always source difficulty beginning builders Borrowing early days flight ROG uses interplane curtains instead dihedral Bill Hannan jxT often failure-prone case crash So heres chance try well-proven seldom seen alternative have some fun process First purchase North Pacific Sleek Streek ready-to-fly model may well fly Streek parts needed model apt damaged process Other materials required include Sev eral 1/16 sq balsa strips lightweight col ored tissue paper small section 1/16 sheet balsa Note would possible laminate 1/16 sq strips purpose choice glue plastic wrap Tools suggested include Single-edge razor blade sharp modeling knife con jinued page 88 February 1977 53 its Sleek Streek prop spinning madly distinctive Boxy Bipe flits camera after takeoff triplane version flies well Color tissue covering doped water shrunk Guide strips allow wing movement balanceScotch tape shown plan Glue cement balsa knife single-edge razor bladeand maybe small hammer tap pins work boardthe tools strength have experience lieve sharp corners whether painted Monokoted stay defined through sorts handling landings Although beefed up fuselage wont make plane fly hetter added strength should let breathe easier dur ing landings turn out less smooth Theres new full-size sailplane organi zation should interest scale enthusiasts Its Vintage Sail plane Assoc 6053 25th Road N Arling ton VA 22207 TRY SCALE ACCESSORIES KITS INE GUN KITS ENGINE KITS & CYLINDERS PILOTS LS PROPS & HANGERS SPINNERS INGS CANOPIES K COWLS ASK FOR OUR PRODUCTS AT YOUR DEALER OR SEND 25 FOR OUR CATALOG WILLIAMS BROS DEPT M 181 PAWNEE ST SAN MARCOS CA 92069 Dues $500 per year quarterly publication deals name imiilies vintage sailplanes Doc Hall sez its must youre interested old time scale Dan Pruss Ri 2 Box 490 Plainfield IL 60544 Boxy Bipe/Hannan continued page 53 pointed blade scissors common straight pins Construction soft building surface such insula tion board pins may easily pushed recommended Cover fullsize plan plastic wrap protect glue Wings Construct wings 1/16 sq balsa strips cutting longest pieces first waste will reduced Note upper lower wings almost quite alike lower wing has two extra members center section shown plan dotted lines Se cure strips straight pins drying X pins over strips rather piercing strips might weaken have new pin-clamps pin-down devices may used easily Allow glued joints dry completely before removing wings building board Tailplanes Wing Spreaders stabilizer rudder wing spreaders constructed same manner wings Try make three wing spread ers nearly alike possible Fuselage modification Sleek Streek fuselage consists cutting portion rear indicated plan essential operation serves lighten tail end creased efficiency Covering Only tops wings stabilizer covered tissue side rudder wing spreaders Note outer sides tip wing spreaders should covered best appearance Flight performance will suffer goof however tissue may applied clear dope adhesive perhaps easier employ white glue has slightly thinned water applied pointed brush use excessive amounts wood warp ing may occur tissue adhesive has dried trim off excess using sharp razor blade water-shrink dope tissue could easily gener ate warps Colors Although color tissue could used chose red white blue white stars Uncle Sam cut 88 Model Aviation RC Soaring continued ordinary white typing paper pointed modeling knife glued posi tion Assembly Cement stabilizer onto top rear fuselage being careful properly square viewed both rear top Next add rudder lining up accurately center stabi lizer trim tab Pin weight lower wing flat building board glue wing spreaders time tallest edges front wing since determine incidence Prop spread ers vertical position drying using sugar cubes dice something similar Add top wing adjusting spread ers needed line up properly Work carefully assure precise alignment complete wing assembly called cellule dry turn upside down glue wing mount members have cut 1/16 sheet should spaced snug fit either side fuselage too tight use folded piece coarse sandpaper inner sides too loose glue strip typing paper inner side mount wing glued may secured strip scotch tape until its proper position has determined Flying Try windless day pos sible test-fly over grass weeds just case Glide model few times shoulder height dives slide wing cellule forward slightly stalls slide assembly aft Next try few turns propeller launch gently throw Watch flight path carefully reshifting wing cellule required achieve smooth descent Increase number hand winds re peat model turns excessively side counter bending paper rud der tab opposite turn extreme cases tiny amount clay ballast may need added wing tip opposite di rection turn Gradually increase number propeller winds until model can safely handle full row knots rather peculiar skidding action model right after launch character istic stabilizing system no cause concern Up point standard North Pacific gum band has employed can replaced longer lubed rubber motor greater endurance ever longer motor may have tendency bunch up propeller hook creat ing prop-stopping bind carefully filing away clearance plastic propeller support bearing shown drawing problem can reduced Ex periment different motor sizes loop lengths use 2-mm size slow flights pier ROG starts better climb Postlude Since model construct ed several different versions have built Russ Barrera Warren Shipp came up triplane have exhibited similar stable flight characteris tics according newspaper clipping sent mother both Boeing Douglas engineers giving serious con sideration vertical tips call winglets Truly history repeats itself FF Old-Timers/Haught continued page 47 operating characteristics engines easy handle overly sensitive Response needle valve good Both engines very insensitive timer adjustments felt engines less flexibility over wide rpm range original ignition engines suspect related porting being designed glow operation higher rpms main purpose wanting test engines compare power output some familiar original ig nition engines similar displacement get information out readers assist choosing suitable powerplants design choice conversions put out power could create uncontrollable best difficult manage beast overpower ing model direct displacement com parison plan compare similar displacement engines using same prop fuel under same operating condi tions Familiar engines good condition used norms results shown accompanying table Both new engines tested performed very good well worth considera tion may reach Otto 77 Products 17119 So Harvard Blvd Gardena CA 90247 Bruce operates Chandler Engineer ing Company 7858 Farralone Ave Cano ga Park CA 91304 several other good craftsmen offering conversion work variety engines well few replica engines being manufactured provide flying engines Dont let elegant old-timer go unbuilt lack suitable powerplant proably bears mention within old-timer movement today rages Great Engine Controversy going hassle whether conver sions and/or replica engines should al lowed competition columnist sim ply doesnt want become involved issue nor feel Model Aviation could benefit anyway Otto Bernhardt sent along sample Blendzall engine try understand gasoline solu ble castor oil Otto suggested could mixed either gasoline Coleman fuel Hav ing never used Coleman fuel engines mixed Blendzall As Otto promised Blendzall fuel burned very 1st RC Masters Class 1st RC Advanced 1st RC Novice 1st Formula Pylon 1st Quarter Midget Pylon 1st CL Stunt Open 1st CL Stunt Senior 1st CL Stunt Junior WORLD CHAMPIONSHIP 1976 HOLLAND 1st 2nd 3rd CL STUNT MORE 1976 NATIONALS 1st CL Combat Op & Sr 1st CL Slow Comb Op & Sr 1st CL Carrier II Op Jr Sr 1st CL Carrier Sr Jr 1st CL Class D Speed Open 1st CL Class C Speed Sr & Jr 1st CL Class B Speed Op& Sr 1st CL Cl ASpeedOpSrJr 1st CL Formula 40 Open 1st CL Class B Proto Jr 1st FF Class B Open 1st FF Class C Open HIGH PERFORMANCE * COMPETITION PROVEN * THIN RIGID BLADES OF HARD MAPLE WOOD * SUPSRBLY FINISHED COMPIETELY FUEL PROOF SPECIAL PRO SERIES 2 FOR RC-FREE FLIGHT CONTROL LINE DIAPITCHPRICE 5/3489 63489 733%4119 83%456129 94566% 77%139 104e7149 106W 8W149 1066W169 114677/ 7% 7% 8159 1166W169 hA67169 126179 125W179 1356219 1466249 1556309 164% 6389 W WIDE 6LADE 6W EXTRA WIDE SERIES 400 B FOR SPEED & RACING ADVANCED DESIGN NO 1 IN PYLON RACING LEADING SPEED RECORD HOLDER OF ALL TIMES RC PYLON RACING DIA PITCHPRICE 5% 3%4119 7 55%6129 7 5N 5%N 6N129 9% 6% 6% 7 7%7%169 9 6%77%169 CONTROL LINE SPEED& RACING DIA PITCHPRICE 4%6%7119 455%119 6788%129 77%10%11139 869149 89N 9%N149 8%77%149 912 13199 N NARROW February 1977 89 7 IIOUT-PERFORMS ALL OTHERS AT THE 1976 NATIONALS
Edition: Model Aviation - 1977/02
Page Numbers: 52, 53, 88, 89
IIII IiII NOTEWINGS AREIiiUPPER AND LOWER WINGS FLAT WITHOUT DIHEDRALI SIMILAR IIII IIH EXCEPT IIu OUTER PIECES SHOWN COVER TOP SURFACESII DASHED LINES ONLY WITH LIGHT TISSUEII 4 REQUIRED FOR LOWER II II DO NOT SHRINKII II WING ONLY II ii II II II II II iiII WING 2 REQUIRED7 WING SPREADER p 3 REQUIRED FILE AWAY PLASTIC FOR MORE RUBBER MOTOR CLEARANCE M PROPELLER TYPING PAPER RUDDER WI ASSEMBLY LANDING GEAR AND FUSELAGE ARE FROM NORTH PACIFIC STREEK iv FIN/ RUDDER INVERTED VIEW OF LOWER WING ION SHOWING MOUNTS 1/4 x 1/16 WING MOUNT 2 REQUIRED SCOTCH TAPE STA B IL Z ER AWAY SHADED PORTION OF FUSELAGE STICK AND DISCARD ALL FRAME STRUCTURE IS 1/16 SQUARE BALSA Boxy Bipe BY BILL HANNAN HERES LITTLE two-winger both easy inexpensive construct fuselage propeller assembly land ing gear North Pacific Sleek Streek few items scrap box should complete project model somewhat unusual employs absolutely no dihedral Instead lateral stability assured vertical curtain surfaces separating wings glider Frank Scott/Jiri Kalina featur ing system appeared February Model viation idea originated early aviation history having advocated Aus tralian Lawrence Hargrave inventor box kite during 1893 Credit also due F W Lanchester England flew model gliders vertical stabilizing vanes during early 1900s first constructor apply concept fullsize aircraft appears have Gabriel Voisin during 1905 Santos-Dumont also employed wing curtains six em hedged bets using dihedral too Other early experimenters tried idea include Louis Bleriot Henri Farman Interestingly pioneer model aeroplanes flew dihedral vertical curtains either majority seem have gliders contrarotat ing propeller-driven twin-pushers subject de-stabilizing effects single propeller too number successful free-flight scale models flown dihedral cheated bit using wing-tip washout pendulum controls few years ago Walt Mooney published series models revived vertical curtain theory new form using oversize profile pilot carica tures lateral stabilization Dihedral joints have always source difficulty beginning builders Borrowing early days flight ROG uses interplane curtains instead dihedral Bill Hannan jxT often failure-prone case crash So heres chance try well-proven seldom seen alternative have some fun process First purchase North Pacific Sleek Streek ready-to-fly model may well fly Streek parts needed model apt damaged process Other materials required include Sev eral 1/16 sq balsa strips lightweight col ored tissue paper small section 1/16 sheet balsa Note would possible laminate 1/16 sq strips purpose choice glue plastic wrap Tools suggested include Single-edge razor blade sharp modeling knife con jinued page 88 February 1977 53 its Sleek Streek prop spinning madly distinctive Boxy Bipe flits camera after takeoff triplane version flies well Color tissue covering doped water shrunk Guide strips allow wing movement balanceScotch tape shown plan Glue cement balsa knife single-edge razor bladeand maybe small hammer tap pins work boardthe tools strength have experience lieve sharp corners whether painted Monokoted stay defined through sorts handling landings Although beefed up fuselage wont make plane fly hetter added strength should let breathe easier dur ing landings turn out less smooth Theres new full-size sailplane organi zation should interest scale enthusiasts Its Vintage Sail plane Assoc 6053 25th Road N Arling ton VA 22207 TRY SCALE ACCESSORIES KITS INE GUN KITS ENGINE KITS & CYLINDERS PILOTS LS PROPS & HANGERS SPINNERS INGS CANOPIES K COWLS ASK FOR OUR PRODUCTS AT YOUR DEALER OR SEND 25 FOR OUR CATALOG WILLIAMS BROS DEPT M 181 PAWNEE ST SAN MARCOS CA 92069 Dues $500 per year quarterly publication deals name imiilies vintage sailplanes Doc Hall sez its must youre interested old time scale Dan Pruss Ri 2 Box 490 Plainfield IL 60544 Boxy Bipe/Hannan continued page 53 pointed blade scissors common straight pins Construction soft building surface such insula tion board pins may easily pushed recommended Cover fullsize plan plastic wrap protect glue Wings Construct wings 1/16 sq balsa strips cutting longest pieces first waste will reduced Note upper lower wings almost quite alike lower wing has two extra members center section shown plan dotted lines Se cure strips straight pins drying X pins over strips rather piercing strips might weaken have new pin-clamps pin-down devices may used easily Allow glued joints dry completely before removing wings building board Tailplanes Wing Spreaders stabilizer rudder wing spreaders constructed same manner wings Try make three wing spread ers nearly alike possible Fuselage modification Sleek Streek fuselage consists cutting portion rear indicated plan essential operation serves lighten tail end creased efficiency Covering Only tops wings stabilizer covered tissue side rudder wing spreaders Note outer sides tip wing spreaders should covered best appearance Flight performance will suffer goof however tissue may applied clear dope adhesive perhaps easier employ white glue has slightly thinned water applied pointed brush use excessive amounts wood warp ing may occur tissue adhesive has dried trim off excess using sharp razor blade water-shrink dope tissue could easily gener ate warps Colors Although color tissue could used chose red white blue white stars Uncle Sam cut 88 Model Aviation RC Soaring continued ordinary white typing paper pointed modeling knife glued posi tion Assembly Cement stabilizer onto top rear fuselage being careful properly square viewed both rear top Next add rudder lining up accurately center stabi lizer trim tab Pin weight lower wing flat building board glue wing spreaders time tallest edges front wing since determine incidence Prop spread ers vertical position drying using sugar cubes dice something similar Add top wing adjusting spread ers needed line up properly Work carefully assure precise alignment complete wing assembly called cellule dry turn upside down glue wing mount members have cut 1/16 sheet should spaced snug fit either side fuselage too tight use folded piece coarse sandpaper inner sides too loose glue strip typing paper inner side mount wing glued may secured strip scotch tape until its proper position has determined Flying Try windless day pos sible test-fly over grass weeds just case Glide model few times shoulder height dives slide wing cellule forward slightly stalls slide assembly aft Next try few turns propeller launch gently throw Watch flight path carefully reshifting wing cellule required achieve smooth descent Increase number hand winds re peat model turns excessively side counter bending paper rud der tab opposite turn extreme cases tiny amount clay ballast may need added wing tip opposite di rection turn Gradually increase number propeller winds until model can safely handle full row knots rather peculiar skidding action model right after launch character istic stabilizing system no cause concern Up point standard North Pacific gum band has employed can replaced longer lubed rubber motor greater endurance ever longer motor may have tendency bunch up propeller hook creat ing prop-stopping bind carefully filing away clearance plastic propeller support bearing shown drawing problem can reduced Ex periment different motor sizes loop lengths use 2-mm size slow flights pier ROG starts better climb Postlude Since model construct ed several different versions have built Russ Barrera Warren Shipp came up triplane have exhibited similar stable flight characteris tics according newspaper clipping sent mother both Boeing Douglas engineers giving serious con sideration vertical tips call winglets Truly history repeats itself FF Old-Timers/Haught continued page 47 operating characteristics engines easy handle overly sensitive Response needle valve good Both engines very insensitive timer adjustments felt engines less flexibility over wide rpm range original ignition engines suspect related porting being designed glow operation higher rpms main purpose wanting test engines compare power output some familiar original ig nition engines similar displacement get information out readers assist choosing suitable powerplants design choice conversions put out power could create uncontrollable best difficult manage beast overpower ing model direct displacement com parison plan compare similar displacement engines using same prop fuel under same operating condi tions Familiar engines good condition used norms results shown accompanying table Both new engines tested performed very good well worth considera tion may reach Otto 77 Products 17119 So Harvard Blvd Gardena CA 90247 Bruce operates Chandler Engineer ing Company 7858 Farralone Ave Cano ga Park CA 91304 several other good craftsmen offering conversion work variety engines well few replica engines being manufactured provide flying engines Dont let elegant old-timer go unbuilt lack suitable powerplant proably bears mention within old-timer movement today rages Great Engine Controversy going hassle whether conver sions and/or replica engines should al lowed competition columnist sim ply doesnt want become involved issue nor feel Model Aviation could benefit anyway Otto Bernhardt sent along sample Blendzall engine try understand gasoline solu ble castor oil Otto suggested could mixed either gasoline Coleman fuel Hav ing never used Coleman fuel engines mixed Blendzall As Otto promised Blendzall fuel burned very 1st RC Masters Class 1st RC Advanced 1st RC Novice 1st Formula Pylon 1st Quarter Midget Pylon 1st CL Stunt Open 1st CL Stunt Senior 1st CL Stunt Junior WORLD CHAMPIONSHIP 1976 HOLLAND 1st 2nd 3rd CL STUNT MORE 1976 NATIONALS 1st CL Combat Op & Sr 1st CL Slow Comb Op & Sr 1st CL Carrier II Op Jr Sr 1st CL Carrier Sr Jr 1st CL Class D Speed Open 1st CL Class C Speed Sr & Jr 1st CL Class B Speed Op& Sr 1st CL Cl ASpeedOpSrJr 1st CL Formula 40 Open 1st CL Class B Proto Jr 1st FF Class B Open 1st FF Class C Open HIGH PERFORMANCE * COMPETITION PROVEN * THIN RIGID BLADES OF HARD MAPLE WOOD * SUPSRBLY FINISHED COMPIETELY FUEL PROOF SPECIAL PRO SERIES 2 FOR RC-FREE FLIGHT CONTROL LINE DIAPITCHPRICE 5/3489 63489 733%4119 83%456129 94566% 77%139 104e7149 106W 8W149 1066W169 114677/ 7% 7% 8159 1166W169 hA67169 126179 125W179 1356219 1466249 1556309 164% 6389 W WIDE 6LADE 6W EXTRA WIDE SERIES 400 B FOR SPEED & RACING ADVANCED DESIGN NO 1 IN PYLON RACING LEADING SPEED RECORD HOLDER OF ALL TIMES RC PYLON RACING DIA PITCHPRICE 5% 3%4119 7 55%6129 7 5N 5%N 6N129 9% 6% 6% 7 7%7%169 9 6%77%169 CONTROL LINE SPEED& RACING DIA PITCHPRICE 4%6%7119 455%119 6788%129 77%10%11139 869149 89N 9%N149 8%77%149 912 13199 N NARROW February 1977 89 7 IIOUT-PERFORMS ALL OTHERS AT THE 1976 NATIONALS