an administratively excellent contest Acadian RC Club featured pig roast Friday night Saturday night specialty 700 pounds crawfish contestants families Hows Southern hospitality outdone Baton Rouge RC Club also sponsored wellmanaged contest cluded two free meals Friday nights feature giant spiced sausages supper good Dick McGraw bought ten pounds take home Saturday evening stuffed ourselves two giant kettles filled Jam balaya look up dictionary transplanted Up-State New Yorker just loves Southern cooking except grits dont have taste have plans trip south next May look up two fine contests Earlier month May contest director what may have last Jim Kirkland Memorial RC Contest Egiin Aero small strip somewhere mammoth 720square-mile Eglin AFB reservation Unfortu nately small strip will support contest caliber Kirkland Memorial club may forced cancel further contests Baton Rouge contest unique experience flying Balsa USA Phaeton biplane powered 05 60 4-cycle engine John Pagan Beaumont Texas let fly airplane about 15 minutes docile responsive airplane real joy fly great time John made few minor modifications kit mostly reinforce cabane struts reshape rudder unique sound 4-cycle OS engine swinging Top Flite 13-5w prop cannot described accurately remotely resembles sound moped loafing past wont claim airplane will perform entire FAI Masters pattern performed loops stall turns axial rolls four-point rolls Left two rudder horns Because rudder driven cables instead pushrod System virtually eliminates floppy rudder See text Right Rudder cable operated system easy install Rocket City long servo arm servo Jam nut locks cievis threaded coupler YOULL reading column just 1979 Nats begins hope successful everyone especially AMA Recent Nats have lost money partly because reductions attendance particularly RC pattern events 1979 gas crunch isnt going help situation either lets keep fingers crossed Good luck competitors though youll reading Nats time contest season has just begun written Ijust returned two delightful contests deep South Lafayette Baton Rouge Louisiana gas shortage scare didnt seem affect attendance Lafayette Coon-Ass Nationals contest famous extracurricular activities Besides putting Modellers sponsored sixth annual contest beautiful temporary site Eglin AFB reservation An Air Force Civil Engineering training squadron has taken over previous site teach emergency repair personnel make rapid runway repairs following bomb dam age training involves blowing holes 200-by 4000-foot runway used flying site temporary site another aban doned runway 200 8000 being shared group performing tests sensor systems detection battlefield intrusion may turn out flying RC models incom patible mission RC aircraft operation interferes test mission Egiin Aero Modellers will probably operating dozens slow low fly-by maneuvers would like comfortable good performing biplane Phacton great choice price right too check out months Pattern Problem Month submitted because nobody sent involves problem everyone has yet have never seen serious solution proposed magazines problem keep rudder getting floppy due excessive wear horn clevis pin hinges solution was proposed last year Continued page 108 September1979 33 Team eTtort seen nere I-ann yen -ute launches Rons powered version GraupnerAmlgo II forfourth-grade Florosa Florida students Flights followed talk airplanes fly Photo Joyce Cole THE chose Waco F-3 biplane flagship because represents Golden Era 1930s flying adventure Add easy snag-free building safe gentle flyingthe result thorough kit engineering careful prototype development features Platt Kits have satisfying building flying experience ahead Kit featuresTop-quality diecut machined balsa plywood Full size plans Separate instruction book isometrics Decals Injection-moulded vacuum-formed plastic cowl cowl blisters wheel pants required nylon fittings Formed wire langing gear & struts Span 60 Area 950 Sq 4 6 channel Engine good 40 60 2657 NE 188th Street Miami Florida 33180 Telephone 935-1436 KELLY PROPS Winningest Fiberglas Graphite Propellers U S Nationals 10-6 9 7 Nashville Slow Rat 8- 8 Gillopt 8 8 Regular 8-7 Regular 7 6 7 55 $650 $650 $500 $475 $475 $375 Graphite $500 614 5% Willoughby $375 Graphite $500 6 7/8 52 Anderson Ballard Latest Version Mk-3 $375 Graphite $500 7 4 FAI Combat Prop $375 TEAM RACE PROPS DRAZEK NOVA JOHN GRAY Fiber $375 Graphite $500 ODDY ONE BLADE PROP w/out counter balence Fiber $400 Graphite $500 DIESEL HEADS fit 15 engines $18 ORDER DIRECT 72 hour shipping cashiers checks money orders 10-day person al checks Money promptly refunded prop stock KELLY PRODUCTS INC P0 Box 38 Western Springs IL 60558 108 Model Aviation Reynolds number region full-size aircraft rm assuming holds true Reynolds number region cant imagine effects reversing have recently built wings taper 15% root 12% tip Martin Baker MB-S uses 2301523012 airfoil 34 ounce per sq ft wing loading consider moderate after some 75 flights have yet suffer unwanted snap roll Ive made some poor takeoffs routinely make high G turns tight square loops feel tapered % airfoil working Another sport plane Ijust finished also has tapered percent airfoil have difficult time getting snap roll command Since full-size planes use decreasing percentage toward tip increasing percent tip thickness would non-scale would look like h- constant percentage wings used scale kits look bad enough would interested comments right Dan about non-scale appear ance wing tips noticeably too thick searching through information airfoils find list stall patterns indicates tapered wing wash-out twist reduced percentage thickness tip will experience tip stalls first because smaller Reynolds number thinner airfoil loss aileron control nearthe stall tendency roll near stall Another stall patterns tapered wing increase 12% root 18% tip Bede 5 plane indicates excellent stall pattern good lift distribution no adverse drag cruise speed Planes have sharply tapered wings use large amounts washout avoid tip stalls high angies attack Douglas A-20 example 4i degrees wash-out com pensate low Reynolds number short chord wing tips tapered portion Cessna wings also use wash-out Overweight underpowered scale models flown near stalled condition need help increase thickness toward tips need great unsightly An alternative wash-out though used prototype certainly employed required original Bob Underwood used wash-out extremely narrow tips deHavilland Comet racer desired results plane neither overweight nor underpowered though wing loading Dans MB-S moderately high likely under powered therefore flies through maneuvers occasional bad take-offs evidence tip stalls RC Aerobatics/Van Putte continued page 33 Master flier Jim Edwards won 1968 Masters Tournament Indianapolis Indiana suggested operating rudder using two thin cables filed suggestion away almost year until judges Kirkland Memorial noted during judges training session rudder getting pretty py After pondering what about week remem bered Jims suggestion less half hour later conversion cable-driven rudder complete used two Sullivan 030 cables tubes Rocket City long servo arm two IM control horns cut down use inside holes new Sullivan cable packages come small threaded couplers sweat solder neatly cable clevis end cable locked threaded coupler ajam nut preclude movement install cable system simply put new horns side rudder drilled extra hole fuselage installed cables adjusted cable tension entire rudder system now very precise slop caused gear backiash servos seems negative reaction manufacturers new Beginner Simple Novice whatever call events limit aircraft system retracts fuel pumps tuned pipes Schnuerle ported engines attitude appears imply something being taken away having such events Just what logic results such conclusion escapes basic events intended draw new competitors pattern flying promote orderly transition highly competitive Novice class seems manufacturers would welcome events technique develop new sources income competitor encouraged continue competition pattern reasonable transition scheme will soon buying exotic products make other classes competitive mail often brings suggestions other fliers recent letter R Gregg Lovick Grapevine Texas warmed cockies Scottish heart mother born Scotland went follows use conductors punch little plier-like affairs punch round holes paper cut small circles out little scraps trim MonoKote accrue put red green dots gel cell Bob andDolly Wischer Ri 1 S221 Lap ham Peak Rd Delafleld WI 53018 polarity marks molded case tough read makes easier clip charger power panel leads making mistakejust match color code clip insulators also mark proper switch positions transmitter switches takeoff low rate aileron elevator whatever own plane needs gear down dot throttle trim acts reminder low trim kills engine lever must centered allows quick pre-flight lever positions before firing up especially box impounded knows bumped what spots stick well clean surface can scraped off fingernall need arises suppose two planes different set-ups could use two sets dots different colors remindermaybe color keyed spot switch plane things punched best way anvil paper hole mylar Lots uses like price too thanks idea Whether Pattern Problem Month continues column depends whether get some interest readers fonn suggestions store ideas about run dry Ron Van Putte 12 Connie Drive Shalimar FL 32579 RC Pylon/Hager continued page 34 Polzin 4 Bill Hager 5 Ken Hulik Dave Keats fast time 12 16 Bakersfield California May 19 20 59 entries Formula down little past years think can blame lower turn-out gas crunch Competition fierce top ten finishers times 1 Dave Shadel 1170 2 Tom Christopher 1189 3 Jerry Boyce 1153 4 Clay Barrett Team Steve Barrett flying 1178 5 John McDermott 1156 6 Harley Condra 11847 Ron Oilman 1199 8 Rusty Van Baren 11709 Andrew Mclndoe 1248 10 Lenard Walker 1279 UPRC its first Formula race May 20 20 entries finished 1 Dave Kelly 2 Hal DeBolt 3 Chuck Boyer 4 Bob Ball 5 Mike Burg Mike Burgs first Formula race idea keep people informed what going racing parts country will try print much various contests have room So keep reports coming Formula racing has past practice judge airplanes appearance workman ship person best looking plane takes off first chore contest management think very important part Formula As racers best built nicest looking planes hobby few areas doing away judging just draw straws something takeoff positions intent make easier new flier have spend much time finishing planes might apt start flying event Scale judging part Formula flier takes pride finish has planes same flier will same type work construc ting plane dont need quickly built Formula thing keeps new flier out event finishing planes Formula racing competitive event have have other events intended new Rosies Power Pod Fits CDX T- D & Med 049 051 Engs Rubber Band Screw Mounting Eng mts upright Inverted Running time appx 4 mm Nylon InjectIon moulded Power 3 ib airpianes totai weight 3/4 OZ WE$495 ALSO MAKE BANTAM Seru D&R Sticks Switch Colors / RED BLACl f YELLOW / ORANGE Write Free Catalog Fine Products duty gearROSIES Other AccessRIC PRODUCTS 3501-B W Moore St. Sent Am CA 92704 September1979 109 Serious model builders have reading MODEL AIRPLANE NEWS fifty years Theres good reason MODEL AIRPLANE NEWS original model airplane magazine 50 years weve continued complete informative model magazine market feature construction articles Radio Control planes cars sailboats powerboats plus full cov erage Free Flight Control Line addition magazine carry in-depth Engine Review month See AMA special membership offer price ordering information DIET GINIBLE USE BALSARITE Balsarite sinks deep wood melts & intermixes fladhesive iron-on 7U coverings heat applied No trapped air permanent ad ~hesion no fuel creep fillets cinch use Monokote Solarfi Coverite Baisarite isa must1 19044
Edition: Model Aviation - 1979/09
Page Numbers: 33, 108, 109
an administratively excellent contest Acadian RC Club featured pig roast Friday night Saturday night specialty 700 pounds crawfish contestants families Hows Southern hospitality outdone Baton Rouge RC Club also sponsored wellmanaged contest cluded two free meals Friday nights feature giant spiced sausages supper good Dick McGraw bought ten pounds take home Saturday evening stuffed ourselves two giant kettles filled Jam balaya look up dictionary transplanted Up-State New Yorker just loves Southern cooking except grits dont have taste have plans trip south next May look up two fine contests Earlier month May contest director what may have last Jim Kirkland Memorial RC Contest Egiin Aero small strip somewhere mammoth 720square-mile Eglin AFB reservation Unfortu nately small strip will support contest caliber Kirkland Memorial club may forced cancel further contests Baton Rouge contest unique experience flying Balsa USA Phaeton biplane powered 05 60 4-cycle engine John Pagan Beaumont Texas let fly airplane about 15 minutes docile responsive airplane real joy fly great time John made few minor modifications kit mostly reinforce cabane struts reshape rudder unique sound 4-cycle OS engine swinging Top Flite 13-5w prop cannot described accurately remotely resembles sound moped loafing past wont claim airplane will perform entire FAI Masters pattern performed loops stall turns axial rolls four-point rolls Left two rudder horns Because rudder driven cables instead pushrod System virtually eliminates floppy rudder See text Right Rudder cable operated system easy install Rocket City long servo arm servo Jam nut locks cievis threaded coupler YOULL reading column just 1979 Nats begins hope successful everyone especially AMA Recent Nats have lost money partly because reductions attendance particularly RC pattern events 1979 gas crunch isnt going help situation either lets keep fingers crossed Good luck competitors though youll reading Nats time contest season has just begun written Ijust returned two delightful contests deep South Lafayette Baton Rouge Louisiana gas shortage scare didnt seem affect attendance Lafayette Coon-Ass Nationals contest famous extracurricular activities Besides putting Modellers sponsored sixth annual contest beautiful temporary site Eglin AFB reservation An Air Force Civil Engineering training squadron has taken over previous site teach emergency repair personnel make rapid runway repairs following bomb dam age training involves blowing holes 200-by 4000-foot runway used flying site temporary site another aban doned runway 200 8000 being shared group performing tests sensor systems detection battlefield intrusion may turn out flying RC models incom patible mission RC aircraft operation interferes test mission Egiin Aero Modellers will probably operating dozens slow low fly-by maneuvers would like comfortable good performing biplane Phacton great choice price right too check out months Pattern Problem Month submitted because nobody sent involves problem everyone has yet have never seen serious solution proposed magazines problem keep rudder getting floppy due excessive wear horn clevis pin hinges solution was proposed last year Continued page 108 September1979 33 Team eTtort seen nere I-ann yen -ute launches Rons powered version GraupnerAmlgo II forfourth-grade Florosa Florida students Flights followed talk airplanes fly Photo Joyce Cole THE chose Waco F-3 biplane flagship because represents Golden Era 1930s flying adventure Add easy snag-free building safe gentle flyingthe result thorough kit engineering careful prototype development features Platt Kits have satisfying building flying experience ahead Kit featuresTop-quality diecut machined balsa plywood Full size plans Separate instruction book isometrics Decals Injection-moulded vacuum-formed plastic cowl cowl blisters wheel pants required nylon fittings Formed wire langing gear & struts Span 60 Area 950 Sq 4 6 channel Engine good 40 60 2657 NE 188th Street Miami Florida 33180 Telephone 935-1436 KELLY PROPS Winningest Fiberglas Graphite Propellers U S Nationals 10-6 9 7 Nashville Slow Rat 8- 8 Gillopt 8 8 Regular 8-7 Regular 7 6 7 55 $650 $650 $500 $475 $475 $375 Graphite $500 614 5% Willoughby $375 Graphite $500 6 7/8 52 Anderson Ballard Latest Version Mk-3 $375 Graphite $500 7 4 FAI Combat Prop $375 TEAM RACE PROPS DRAZEK NOVA JOHN GRAY Fiber $375 Graphite $500 ODDY ONE BLADE PROP w/out counter balence Fiber $400 Graphite $500 DIESEL HEADS fit 15 engines $18 ORDER DIRECT 72 hour shipping cashiers checks money orders 10-day person al checks Money promptly refunded prop stock KELLY PRODUCTS INC P0 Box 38 Western Springs IL 60558 108 Model Aviation Reynolds number region full-size aircraft rm assuming holds true Reynolds number region cant imagine effects reversing have recently built wings taper 15% root 12% tip Martin Baker MB-S uses 2301523012 airfoil 34 ounce per sq ft wing loading consider moderate after some 75 flights have yet suffer unwanted snap roll Ive made some poor takeoffs routinely make high G turns tight square loops feel tapered % airfoil working Another sport plane Ijust finished also has tapered percent airfoil have difficult time getting snap roll command Since full-size planes use decreasing percentage toward tip increasing percent tip thickness would non-scale would look like h- constant percentage wings used scale kits look bad enough would interested comments right Dan about non-scale appear ance wing tips noticeably too thick searching through information airfoils find list stall patterns indicates tapered wing wash-out twist reduced percentage thickness tip will experience tip stalls first because smaller Reynolds number thinner airfoil loss aileron control nearthe stall tendency roll near stall Another stall patterns tapered wing increase 12% root 18% tip Bede 5 plane indicates excellent stall pattern good lift distribution no adverse drag cruise speed Planes have sharply tapered wings use large amounts washout avoid tip stalls high angies attack Douglas A-20 example 4i degrees wash-out com pensate low Reynolds number short chord wing tips tapered portion Cessna wings also use wash-out Overweight underpowered scale models flown near stalled condition need help increase thickness toward tips need great unsightly An alternative wash-out though used prototype certainly employed required original Bob Underwood used wash-out extremely narrow tips deHavilland Comet racer desired results plane neither overweight nor underpowered though wing loading Dans MB-S moderately high likely under powered therefore flies through maneuvers occasional bad take-offs evidence tip stalls RC Aerobatics/Van Putte continued page 33 Master flier Jim Edwards won 1968 Masters Tournament Indianapolis Indiana suggested operating rudder using two thin cables filed suggestion away almost year until judges Kirkland Memorial noted during judges training session rudder getting pretty py After pondering what about week remem bered Jims suggestion less half hour later conversion cable-driven rudder complete used two Sullivan 030 cables tubes Rocket City long servo arm two IM control horns cut down use inside holes new Sullivan cable packages come small threaded couplers sweat solder neatly cable clevis end cable locked threaded coupler ajam nut preclude movement install cable system simply put new horns side rudder drilled extra hole fuselage installed cables adjusted cable tension entire rudder system now very precise slop caused gear backiash servos seems negative reaction manufacturers new Beginner Simple Novice whatever call events limit aircraft system retracts fuel pumps tuned pipes Schnuerle ported engines attitude appears imply something being taken away having such events Just what logic results such conclusion escapes basic events intended draw new competitors pattern flying promote orderly transition highly competitive Novice class seems manufacturers would welcome events technique develop new sources income competitor encouraged continue competition pattern reasonable transition scheme will soon buying exotic products make other classes competitive mail often brings suggestions other fliers recent letter R Gregg Lovick Grapevine Texas warmed cockies Scottish heart mother born Scotland went follows use conductors punch little plier-like affairs punch round holes paper cut small circles out little scraps trim MonoKote accrue put red green dots gel cell Bob andDolly Wischer Ri 1 S221 Lap ham Peak Rd Delafleld WI 53018 polarity marks molded case tough read makes easier clip charger power panel leads making mistakejust match color code clip insulators also mark proper switch positions transmitter switches takeoff low rate aileron elevator whatever own plane needs gear down dot throttle trim acts reminder low trim kills engine lever must centered allows quick pre-flight lever positions before firing up especially box impounded knows bumped what spots stick well clean surface can scraped off fingernall need arises suppose two planes different set-ups could use two sets dots different colors remindermaybe color keyed spot switch plane things punched best way anvil paper hole mylar Lots uses like price too thanks idea Whether Pattern Problem Month continues column depends whether get some interest readers fonn suggestions store ideas about run dry Ron Van Putte 12 Connie Drive Shalimar FL 32579 RC Pylon/Hager continued page 34 Polzin 4 Bill Hager 5 Ken Hulik Dave Keats fast time 12 16 Bakersfield California May 19 20 59 entries Formula down little past years think can blame lower turn-out gas crunch Competition fierce top ten finishers times 1 Dave Shadel 1170 2 Tom Christopher 1189 3 Jerry Boyce 1153 4 Clay Barrett Team Steve Barrett flying 1178 5 John McDermott 1156 6 Harley Condra 11847 Ron Oilman 1199 8 Rusty Van Baren 11709 Andrew Mclndoe 1248 10 Lenard Walker 1279 UPRC its first Formula race May 20 20 entries finished 1 Dave Kelly 2 Hal DeBolt 3 Chuck Boyer 4 Bob Ball 5 Mike Burg Mike Burgs first Formula race idea keep people informed what going racing parts country will try print much various contests have room So keep reports coming Formula racing has past practice judge airplanes appearance workman ship person best looking plane takes off first chore contest management think very important part Formula As racers best built nicest looking planes hobby few areas doing away judging just draw straws something takeoff positions intent make easier new flier have spend much time finishing planes might apt start flying event Scale judging part Formula flier takes pride finish has planes same flier will same type work construc ting plane dont need quickly built Formula thing keeps new flier out event finishing planes Formula racing competitive event have have other events intended new Rosies Power Pod Fits CDX T- D & Med 049 051 Engs Rubber Band Screw Mounting Eng mts upright Inverted Running time appx 4 mm Nylon InjectIon moulded Power 3 ib airpianes totai weight 3/4 OZ WE$495 ALSO MAKE BANTAM Seru D&R Sticks Switch Colors / RED BLACl f YELLOW / ORANGE Write Free Catalog Fine Products duty gearROSIES Other AccessRIC PRODUCTS 3501-B W Moore St. Sent Am CA 92704 September1979 109 Serious model builders have reading MODEL AIRPLANE NEWS fifty years Theres good reason MODEL AIRPLANE NEWS original model airplane magazine 50 years weve continued complete informative model magazine market feature construction articles Radio Control planes cars sailboats powerboats plus full cov erage Free Flight Control Line addition magazine carry in-depth Engine Review month See AMA special membership offer price ordering information DIET GINIBLE USE BALSARITE Balsarite sinks deep wood melts & intermixes fladhesive iron-on 7U coverings heat applied No trapped air permanent ad ~hesion no fuel creep fillets cinch use Monokote Solarfi Coverite Baisarite isa must1 19044
Edition: Model Aviation - 1979/09
Page Numbers: 33, 108, 109
an administratively excellent contest Acadian RC Club featured pig roast Friday night Saturday night specialty 700 pounds crawfish contestants families Hows Southern hospitality outdone Baton Rouge RC Club also sponsored wellmanaged contest cluded two free meals Friday nights feature giant spiced sausages supper good Dick McGraw bought ten pounds take home Saturday evening stuffed ourselves two giant kettles filled Jam balaya look up dictionary transplanted Up-State New Yorker just loves Southern cooking except grits dont have taste have plans trip south next May look up two fine contests Earlier month May contest director what may have last Jim Kirkland Memorial RC Contest Egiin Aero small strip somewhere mammoth 720square-mile Eglin AFB reservation Unfortu nately small strip will support contest caliber Kirkland Memorial club may forced cancel further contests Baton Rouge contest unique experience flying Balsa USA Phaeton biplane powered 05 60 4-cycle engine John Pagan Beaumont Texas let fly airplane about 15 minutes docile responsive airplane real joy fly great time John made few minor modifications kit mostly reinforce cabane struts reshape rudder unique sound 4-cycle OS engine swinging Top Flite 13-5w prop cannot described accurately remotely resembles sound moped loafing past wont claim airplane will perform entire FAI Masters pattern performed loops stall turns axial rolls four-point rolls Left two rudder horns Because rudder driven cables instead pushrod System virtually eliminates floppy rudder See text Right Rudder cable operated system easy install Rocket City long servo arm servo Jam nut locks cievis threaded coupler YOULL reading column just 1979 Nats begins hope successful everyone especially AMA Recent Nats have lost money partly because reductions attendance particularly RC pattern events 1979 gas crunch isnt going help situation either lets keep fingers crossed Good luck competitors though youll reading Nats time contest season has just begun written Ijust returned two delightful contests deep South Lafayette Baton Rouge Louisiana gas shortage scare didnt seem affect attendance Lafayette Coon-Ass Nationals contest famous extracurricular activities Besides putting Modellers sponsored sixth annual contest beautiful temporary site Eglin AFB reservation An Air Force Civil Engineering training squadron has taken over previous site teach emergency repair personnel make rapid runway repairs following bomb dam age training involves blowing holes 200-by 4000-foot runway used flying site temporary site another aban doned runway 200 8000 being shared group performing tests sensor systems detection battlefield intrusion may turn out flying RC models incom patible mission RC aircraft operation interferes test mission Egiin Aero Modellers will probably operating dozens slow low fly-by maneuvers would like comfortable good performing biplane Phacton great choice price right too check out months Pattern Problem Month submitted because nobody sent involves problem everyone has yet have never seen serious solution proposed magazines problem keep rudder getting floppy due excessive wear horn clevis pin hinges solution was proposed last year Continued page 108 September1979 33 Team eTtort seen nere I-ann yen -ute launches Rons powered version GraupnerAmlgo II forfourth-grade Florosa Florida students Flights followed talk airplanes fly Photo Joyce Cole THE chose Waco F-3 biplane flagship because represents Golden Era 1930s flying adventure Add easy snag-free building safe gentle flyingthe result thorough kit engineering careful prototype development features Platt Kits have satisfying building flying experience ahead Kit featuresTop-quality diecut machined balsa plywood Full size plans Separate instruction book isometrics Decals Injection-moulded vacuum-formed plastic cowl cowl blisters wheel pants required nylon fittings Formed wire langing gear & struts Span 60 Area 950 Sq 4 6 channel Engine good 40 60 2657 NE 188th Street Miami Florida 33180 Telephone 935-1436 KELLY PROPS Winningest Fiberglas Graphite Propellers U S Nationals 10-6 9 7 Nashville Slow Rat 8- 8 Gillopt 8 8 Regular 8-7 Regular 7 6 7 55 $650 $650 $500 $475 $475 $375 Graphite $500 614 5% Willoughby $375 Graphite $500 6 7/8 52 Anderson Ballard Latest Version Mk-3 $375 Graphite $500 7 4 FAI Combat Prop $375 TEAM RACE PROPS DRAZEK NOVA JOHN GRAY Fiber $375 Graphite $500 ODDY ONE BLADE PROP w/out counter balence Fiber $400 Graphite $500 DIESEL HEADS fit 15 engines $18 ORDER DIRECT 72 hour shipping cashiers checks money orders 10-day person al checks Money promptly refunded prop stock KELLY PRODUCTS INC P0 Box 38 Western Springs IL 60558 108 Model Aviation Reynolds number region full-size aircraft rm assuming holds true Reynolds number region cant imagine effects reversing have recently built wings taper 15% root 12% tip Martin Baker MB-S uses 2301523012 airfoil 34 ounce per sq ft wing loading consider moderate after some 75 flights have yet suffer unwanted snap roll Ive made some poor takeoffs routinely make high G turns tight square loops feel tapered % airfoil working Another sport plane Ijust finished also has tapered percent airfoil have difficult time getting snap roll command Since full-size planes use decreasing percentage toward tip increasing percent tip thickness would non-scale would look like h- constant percentage wings used scale kits look bad enough would interested comments right Dan about non-scale appear ance wing tips noticeably too thick searching through information airfoils find list stall patterns indicates tapered wing wash-out twist reduced percentage thickness tip will experience tip stalls first because smaller Reynolds number thinner airfoil loss aileron control nearthe stall tendency roll near stall Another stall patterns tapered wing increase 12% root 18% tip Bede 5 plane indicates excellent stall pattern good lift distribution no adverse drag cruise speed Planes have sharply tapered wings use large amounts washout avoid tip stalls high angies attack Douglas A-20 example 4i degrees wash-out com pensate low Reynolds number short chord wing tips tapered portion Cessna wings also use wash-out Overweight underpowered scale models flown near stalled condition need help increase thickness toward tips need great unsightly An alternative wash-out though used prototype certainly employed required original Bob Underwood used wash-out extremely narrow tips deHavilland Comet racer desired results plane neither overweight nor underpowered though wing loading Dans MB-S moderately high likely under powered therefore flies through maneuvers occasional bad take-offs evidence tip stalls RC Aerobatics/Van Putte continued page 33 Master flier Jim Edwards won 1968 Masters Tournament Indianapolis Indiana suggested operating rudder using two thin cables filed suggestion away almost year until judges Kirkland Memorial noted during judges training session rudder getting pretty py After pondering what about week remem bered Jims suggestion less half hour later conversion cable-driven rudder complete used two Sullivan 030 cables tubes Rocket City long servo arm two IM control horns cut down use inside holes new Sullivan cable packages come small threaded couplers sweat solder neatly cable clevis end cable locked threaded coupler ajam nut preclude movement install cable system simply put new horns side rudder drilled extra hole fuselage installed cables adjusted cable tension entire rudder system now very precise slop caused gear backiash servos seems negative reaction manufacturers new Beginner Simple Novice whatever call events limit aircraft system retracts fuel pumps tuned pipes Schnuerle ported engines attitude appears imply something being taken away having such events Just what logic results such conclusion escapes basic events intended draw new competitors pattern flying promote orderly transition highly competitive Novice class seems manufacturers would welcome events technique develop new sources income competitor encouraged continue competition pattern reasonable transition scheme will soon buying exotic products make other classes competitive mail often brings suggestions other fliers recent letter R Gregg Lovick Grapevine Texas warmed cockies Scottish heart mother born Scotland went follows use conductors punch little plier-like affairs punch round holes paper cut small circles out little scraps trim MonoKote accrue put red green dots gel cell Bob andDolly Wischer Ri 1 S221 Lap ham Peak Rd Delafleld WI 53018 polarity marks molded case tough read makes easier clip charger power panel leads making mistakejust match color code clip insulators also mark proper switch positions transmitter switches takeoff low rate aileron elevator whatever own plane needs gear down dot throttle trim acts reminder low trim kills engine lever must centered allows quick pre-flight lever positions before firing up especially box impounded knows bumped what spots stick well clean surface can scraped off fingernall need arises suppose two planes different set-ups could use two sets dots different colors remindermaybe color keyed spot switch plane things punched best way anvil paper hole mylar Lots uses like price too thanks idea Whether Pattern Problem Month continues column depends whether get some interest readers fonn suggestions store ideas about run dry Ron Van Putte 12 Connie Drive Shalimar FL 32579 RC Pylon/Hager continued page 34 Polzin 4 Bill Hager 5 Ken Hulik Dave Keats fast time 12 16 Bakersfield California May 19 20 59 entries Formula down little past years think can blame lower turn-out gas crunch Competition fierce top ten finishers times 1 Dave Shadel 1170 2 Tom Christopher 1189 3 Jerry Boyce 1153 4 Clay Barrett Team Steve Barrett flying 1178 5 John McDermott 1156 6 Harley Condra 11847 Ron Oilman 1199 8 Rusty Van Baren 11709 Andrew Mclndoe 1248 10 Lenard Walker 1279 UPRC its first Formula race May 20 20 entries finished 1 Dave Kelly 2 Hal DeBolt 3 Chuck Boyer 4 Bob Ball 5 Mike Burg Mike Burgs first Formula race idea keep people informed what going racing parts country will try print much various contests have room So keep reports coming Formula racing has past practice judge airplanes appearance workman ship person best looking plane takes off first chore contest management think very important part Formula As racers best built nicest looking planes hobby few areas doing away judging just draw straws something takeoff positions intent make easier new flier have spend much time finishing planes might apt start flying event Scale judging part Formula flier takes pride finish has planes same flier will same type work construc ting plane dont need quickly built Formula thing keeps new flier out event finishing planes Formula racing competitive event have have other events intended new Rosies Power Pod Fits CDX T- D & Med 049 051 Engs Rubber Band Screw Mounting Eng mts upright Inverted Running time appx 4 mm Nylon InjectIon moulded Power 3 ib airpianes totai weight 3/4 OZ WE$495 ALSO MAKE BANTAM Seru D&R Sticks Switch Colors / RED BLACl f YELLOW / ORANGE Write Free Catalog Fine Products duty gearROSIES Other AccessRIC PRODUCTS 3501-B W Moore St. Sent Am CA 92704 September1979 109 Serious model builders have reading MODEL AIRPLANE NEWS fifty years Theres good reason MODEL AIRPLANE NEWS original model airplane magazine 50 years weve continued complete informative model magazine market feature construction articles Radio Control planes cars sailboats powerboats plus full cov erage Free Flight Control Line addition magazine carry in-depth Engine Review month See AMA special membership offer price ordering information DIET GINIBLE USE BALSARITE Balsarite sinks deep wood melts & intermixes fladhesive iron-on 7U coverings heat applied No trapped air permanent ad ~hesion no fuel creep fillets cinch use Monokote Solarfi Coverite Baisarite isa must1 19044