Soaring IDanPruss ITS BEEN SAID before its worth repeating being reminded thing sport has going it flexibility model design competition events further bear latter out Neal Nolte sent idea Bob Clarke along Cordova Model Masters used two contests past year task simply seven-minute pre cision duration spot landing bonus newcomers precision dura tion based point per second flight time up seven minutes Perfect flight score therefore would 420 points Now task itself isnt unique contestants highest lowest rounds scratched threw out bad air flight eliminated chance flier running away pack per haps goed luck flight As Nolte pointed out five rounds flying hi-b throw-out attacked same effects man-on-man one-on-one contests namely chance effects air variation Nolte further pointed out con tests can run less manpower frequency problems man-on-man contest As pointed out column some months back advan tages one-on-one concept Achilles heel system lies pos sibility two- three- four-way fly-off top spot fliers found same frequency two contests Cordova Model Masters held claim following 3540 contestants about 200 tows contest Four winches permitted con tests run less three onehalf hours both contests 30% flights over six one-half minutes 600-650 tow lines 16% flights high flights subse quently thrown out leaving 14% max flight figure day Interestingly winners both contests poor round being consistent other rounds able come out top Other advantages include simplified scorekeeping since type task being flown turn eliminates other scoring charts conversion tables contestants timers confused about what flown round further pointed out really sim plify scoring timers merely showed recorded flight stop watch scorekeepers time posted flier timer acknowledged time should prevent scoring irregularities negative side hi-b throw away system must realized fact longer contests meet must run efficient manner Five rounds seems minimum would practical considers three rounds would tallied 100-contestant show means 500 flights day day contest number has achieved before logistics such event become some concern considers further 200 40% flights will naught might take some convincing ole winchmaster 40% efforts will also go same value try own club level sure sounds like luck factorsgood badhave reduced should tighten spread scoreboard Nolte also sent expression two observation old bugaboospot landings noted back 19741975 LSF Tournaments landing zone concrete resulted scale-like approaches landings great majority flights attempted test durability hard ness runways three mix found balsa/fiberglass/Monokote came out very poor second Because us arent blessed landing zones Nolte suggested following pilot wants dork has accepted modelers vernacular describing landing closely resembles kamakaze attack results model closely akin full-size counterpart plane lets make highly probable breaks Ive chance try fol lowing landing area hope shortly pie-shaped wedge 30 40 degrees arc out common 25-foot radius part area laid out plywood edges leveled padded buried whatever no abrupt edges exposed rip wings noses projected distance out edge radii pylons made two A-in sq balsa pieces taped end end giving 5- 6-foot height after being pushed ground inch pylons shear easily ground level hit dont Continued page 81 Curled up wing tips distinguish Jim Porters original flight line SOAR Nats 20 Model Aviation Greg Seydel looks pessimistically over cast sky SOAR Nats Floyd Combs original design rviade ready flight 100 mph course two days flying time contest size its hard set things up other way facilities Winter Nats fan tastic takes place old WW-II base miles good runways end large aircraft stored various airlines strip also used forest service Would believe have WW-II B-17 equipped forest fire fighting well other modern aircraft purpose excellent cafeteria base well coffee sandwich shop right flight line end field contest held have attend ed contests coast coast cluding AMA Nats Tucson Winter Nats has have finest facili ties RC contest CDs dream Speaking CDs Bill Hempel Chuck Taylor people Tucson R/C Club commended fine job year side benefits Winter Nats Tucson fine Air Museum lot aircraft WW-II vintagemany need restoring exceptions B-24J reporter called home over 600 hours flying time back 4445 old Libby looks could take off right now aircraft dire need restoration out door museum started within last two three years have unusual aircraft such several large amphibians sev eral B-26s A-26 called WW II B-25s P-63 cargo craft including C-46 C-47 B29s course several early jets some interesting little-known helicopters Its gratifying after 30 years since WW II mood suppose money throughout country restore preserve possible aircraft era years following 1946 fine historical aircraft ended scrap pile lost forever especially true Japanese aircraft WW II famous standpoint infamous airplanes war Zero produced great numbers 1935 1945 country no airworthy Zeros left very few static ones WW-IIs Spitfires P-S ls ME-109s flying well-kept ma chines because shortsightedness no true Zerosonly makeshift AT-6-type Zeros Its truly shame want get chance full retract points should retract tail wheel did full-size bird old scale friend Lincoln Nebraska Don Neill has worked out very success ful retracting tail-wheel unit has used times latest su perb F6F Hellcat flew 1976 AMA Scale Nats have seen unit firsthand really works drawings speak themselves Bud Atkinson 734 North 6th Street Terrace Blue Springs MO 64015 RC Soaring/Pruss Continued page 20 disrupt flight path dont shear off Nolte goes further say 10-mph wind may too much balsa recently took part contest put Merced R/C used very impressed effectiveness Threading 12-foot wing through 15foot pylon gate rather fun too gain landing points Id propose pilot must enter through pylon gate touching land hard surface entire fuselage comes rest within wedge boundaries cuts out approach-fromany-angle -situation have now pylons demanding restricted approach line hard surface will foster smoother scale-like touchdowns rather crash dive Requiring entire fuselage inside wedge will force pilots maximize chances scoring landApril 1977 81 1st RC Masters Class 1st RC Advanced 1st RC Novice 1st RC Sport Scale 1st Formula Pylon 1st Quarter Midget Pylon 1st CL Stunt Open 1st CL Stunt Senior 1st CL Stunt Junior WORLD CHAMPIONSHIP 1976 AND 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 ClassCSpeedSr&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 BIADES OF HARD MAPLE WOOD * SUPERBLY FINISHED COMPLETELY FUEL PROOF SPECIAL PRO SERIES 2 FOR RC-FREE FLIGHT CONTROL LINE DIAPITCHPRICE 5%3499 e3499 733%4tie a3%45e129 94599A 77%139 10497149 10eW eW149 106EW159 114e77% 7I7%9159 11eEW199 11%E7i99 129179 125W179 1356219 14se249 1556309 194/9399 W WIDE BLADE 9W EXTRA WIDE SERIES 400 B FOR SPEED & RACING ADVANCED DESIGN NO1 IN PYLON RACING LEADING SPEED RECORD HOLDER OF ALL TIMES RC PYLON RACING CIA PITCH PRICE 5%3%4119 7 55/,9 129 7 SN 5AN eN 129 8% 9%9%7 7%7%199 9 9%7 747%199 CONTROL LINE SPEED & RACING DIA PITCH PRICE 4/947119 4%55119 9799%129 77% 10411139 999149 99N 9%N149 9%77%149 91213199 N NARROW ing farther out wedge trying slide farther point wedge Neil goes Finally dork landing now pays off long dont shed parts break something off dork point wedge isnt very likely produce score since dork usually result too much approach speed tends produce cartwheels ground loops should cases put some part fuselage outside boundary radii Taking Noltes figures 25-foot 30 degrees landing zone would about 164 square feet translates over five sheets -in plywood Cutting small enough sections ease transporting assembling joints wouldnt disrupt smooth landing might cause club field director some concern its worth try Get lead February issue column described proven method permanent nose ballast made B-B shot Since scribe has used B-B shot rather simple yet effec tive way make ballast modules improved L/D better penetrating capabilities wing loadings rela tively light adding ballast center gravity used method ballasting varies modelers Most common slug lead cut fit fuse lage compartment sophisticated methods include custom fit bars various weights desired overall ballast can made up smaller modules Leadfilled brass tubes slide wings parallel close main sparswork well also However simple ballast solution acquire some small plastic bags Bags 5 inches 11/2 inches work very well added insurance against punctures take three bags put inside other Eight ounces shot produces soft lead packet approximately 3A inches rolling top bag over several times stapling fold have secure packet course packets can made up weight three four different sizes recommended allows combinations selecting over ballast weight soft packs have advantage being able absorb shock should hard landing occur pillowlike shape wont localize sudden load such bolted down lead bars overall effect much gentle treat ment sailplanes structure youre making ballast might want have wing-loading figures handy Make up chart three columns ballast weight wing loading Under ballast column put numbers ounces ballast might using varying conditions Under weight column list planes up weights respective ballast weights Next figures under wing loading list various respective figures Wing loading per square foot can easily computed dividing overall weight wing area square feet Tape chart under canopy floor ballast compartment ready reference As right combinations practice under varying wind condi tionscan determine Dan Pruss Rt 2 Box 490 Plainfield IL 60544 RC Helicopters/Schoonard Continued page 21 will make rapid descents quick stops tail moving inch Some may want mount pot collective servo am sure can done very neatly very simple method has permitted great deal experimenting re moving canopy seat will notice adding mix pot tail-rotor servo will increase servo travel Because will have move tail-rotor pushrod get travel accustomed creased travel tends make tail rotor touchy mix travel will have adjusted style flying may also have recenter tail-rotor servo pot bring mix tail rotor proper relationship Next months column will deal mod tail-rotor drive eliminates gear shaft wear clutch greatly increases power head Good luck tail-rotor mix youre flying youre trying Walt Schoonard 2080 Sharon Rd Winter Park FL 32789 Smith Miniplane Tailored 35 45 engine range Sigs kit famous homebuilt flown Maxey Hester firsts RC Sport Scale 76 Canadian Nats Multiwing Championships Span 44 area 650 sq Features too numerous mention include molded ABS plastic cowling wheel pants formed cabane struts formed aileron torque rods colorful decals pre-bent landing gear wires illustrated step-by-step structions Most complete hardware package includes aluminum motor mounts molded control hinges nylon bolts tailwheel bracket etc Design Mike Gretz Price $4995Sig Manufacturing Co Montezuma IA 50171 p roduct,viewprod uctreviewp rod u otroviwprodu Otroview 82 Model Aviation OUT- PERFORMS ALL OTHERS AT THE 1976 NATIONALS productrevieworoductreviworoduCtrevieWprOdoCtreVieW
Edition: Model Aviation - 1977/04
Page Numbers: 20, 81, 82
Soaring IDanPruss ITS BEEN SAID before its worth repeating being reminded thing sport has going it flexibility model design competition events further bear latter out Neal Nolte sent idea Bob Clarke along Cordova Model Masters used two contests past year task simply seven-minute pre cision duration spot landing bonus newcomers precision dura tion based point per second flight time up seven minutes Perfect flight score therefore would 420 points Now task itself isnt unique contestants highest lowest rounds scratched threw out bad air flight eliminated chance flier running away pack per haps goed luck flight As Nolte pointed out five rounds flying hi-b throw-out attacked same effects man-on-man one-on-one contests namely chance effects air variation Nolte further pointed out con tests can run less manpower frequency problems man-on-man contest As pointed out column some months back advan tages one-on-one concept Achilles heel system lies pos sibility two- three- four-way fly-off top spot fliers found same frequency two contests Cordova Model Masters held claim following 3540 contestants about 200 tows contest Four winches permitted con tests run less three onehalf hours both contests 30% flights over six one-half minutes 600-650 tow lines 16% flights high flights subse quently thrown out leaving 14% max flight figure day Interestingly winners both contests poor round being consistent other rounds able come out top Other advantages include simplified scorekeeping since type task being flown turn eliminates other scoring charts conversion tables contestants timers confused about what flown round further pointed out really sim plify scoring timers merely showed recorded flight stop watch scorekeepers time posted flier timer acknowledged time should prevent scoring irregularities negative side hi-b throw away system must realized fact longer contests meet must run efficient manner Five rounds seems minimum would practical considers three rounds would tallied 100-contestant show means 500 flights day day contest number has achieved before logistics such event become some concern considers further 200 40% flights will naught might take some convincing ole winchmaster 40% efforts will also go same value try own club level sure sounds like luck factorsgood badhave reduced should tighten spread scoreboard Nolte also sent expression two observation old bugaboospot landings noted back 19741975 LSF Tournaments landing zone concrete resulted scale-like approaches landings great majority flights attempted test durability hard ness runways three mix found balsa/fiberglass/Monokote came out very poor second Because us arent blessed landing zones Nolte suggested following pilot wants dork has accepted modelers vernacular describing landing closely resembles kamakaze attack results model closely akin full-size counterpart plane lets make highly probable breaks Ive chance try fol lowing landing area hope shortly pie-shaped wedge 30 40 degrees arc out common 25-foot radius part area laid out plywood edges leveled padded buried whatever no abrupt edges exposed rip wings noses projected distance out edge radii pylons made two A-in sq balsa pieces taped end end giving 5- 6-foot height after being pushed ground inch pylons shear easily ground level hit dont Continued page 81 Curled up wing tips distinguish Jim Porters original flight line SOAR Nats 20 Model Aviation Greg Seydel looks pessimistically over cast sky SOAR Nats Floyd Combs original design rviade ready flight 100 mph course two days flying time contest size its hard set things up other way facilities Winter Nats fan tastic takes place old WW-II base miles good runways end large aircraft stored various airlines strip also used forest service Would believe have WW-II B-17 equipped forest fire fighting well other modern aircraft purpose excellent cafeteria base well coffee sandwich shop right flight line end field contest held have attend ed contests coast coast cluding AMA Nats Tucson Winter Nats has have finest facili ties RC contest CDs dream Speaking CDs Bill Hempel Chuck Taylor people Tucson R/C Club commended fine job year side benefits Winter Nats Tucson fine Air Museum lot aircraft WW-II vintagemany need restoring exceptions B-24J reporter called home over 600 hours flying time back 4445 old Libby looks could take off right now aircraft dire need restoration out door museum started within last two three years have unusual aircraft such several large amphibians sev eral B-26s A-26 called WW II B-25s P-63 cargo craft including C-46 C-47 B29s course several early jets some interesting little-known helicopters Its gratifying after 30 years since WW II mood suppose money throughout country restore preserve possible aircraft era years following 1946 fine historical aircraft ended scrap pile lost forever especially true Japanese aircraft WW II famous standpoint infamous airplanes war Zero produced great numbers 1935 1945 country no airworthy Zeros left very few static ones WW-IIs Spitfires P-S ls ME-109s flying well-kept ma chines because shortsightedness no true Zerosonly makeshift AT-6-type Zeros Its truly shame want get chance full retract points should retract tail wheel did full-size bird old scale friend Lincoln Nebraska Don Neill has worked out very success ful retracting tail-wheel unit has used times latest su perb F6F Hellcat flew 1976 AMA Scale Nats have seen unit firsthand really works drawings speak themselves Bud Atkinson 734 North 6th Street Terrace Blue Springs MO 64015 RC Soaring/Pruss Continued page 20 disrupt flight path dont shear off Nolte goes further say 10-mph wind may too much balsa recently took part contest put Merced R/C used very impressed effectiveness Threading 12-foot wing through 15foot pylon gate rather fun too gain landing points Id propose pilot must enter through pylon gate touching land hard surface entire fuselage comes rest within wedge boundaries cuts out approach-fromany-angle -situation have now pylons demanding restricted approach line hard surface will foster smoother scale-like touchdowns rather crash dive Requiring entire fuselage inside wedge will force pilots maximize chances scoring landApril 1977 81 1st RC Masters Class 1st RC Advanced 1st RC Novice 1st RC Sport Scale 1st Formula Pylon 1st Quarter Midget Pylon 1st CL Stunt Open 1st CL Stunt Senior 1st CL Stunt Junior WORLD CHAMPIONSHIP 1976 AND 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 ClassCSpeedSr&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 BIADES OF HARD MAPLE WOOD * SUPERBLY FINISHED COMPLETELY FUEL PROOF SPECIAL PRO SERIES 2 FOR RC-FREE FLIGHT CONTROL LINE DIAPITCHPRICE 5%3499 e3499 733%4tie a3%45e129 94599A 77%139 10497149 10eW eW149 106EW159 114e77% 7I7%9159 11eEW199 11%E7i99 129179 125W179 1356219 14se249 1556309 194/9399 W WIDE BLADE 9W EXTRA WIDE SERIES 400 B FOR SPEED & RACING ADVANCED DESIGN NO1 IN PYLON RACING LEADING SPEED RECORD HOLDER OF ALL TIMES RC PYLON RACING CIA PITCH PRICE 5%3%4119 7 55/,9 129 7 SN 5AN eN 129 8% 9%9%7 7%7%199 9 9%7 747%199 CONTROL LINE SPEED & RACING DIA PITCH PRICE 4/947119 4%55119 9799%129 77% 10411139 999149 99N 9%N149 9%77%149 91213199 N NARROW ing farther out wedge trying slide farther point wedge Neil goes Finally dork landing now pays off long dont shed parts break something off dork point wedge isnt very likely produce score since dork usually result too much approach speed tends produce cartwheels ground loops should cases put some part fuselage outside boundary radii Taking Noltes figures 25-foot 30 degrees landing zone would about 164 square feet translates over five sheets -in plywood Cutting small enough sections ease transporting assembling joints wouldnt disrupt smooth landing might cause club field director some concern its worth try Get lead February issue column described proven method permanent nose ballast made B-B shot Since scribe has used B-B shot rather simple yet effec tive way make ballast modules improved L/D better penetrating capabilities wing loadings rela tively light adding ballast center gravity used method ballasting varies modelers Most common slug lead cut fit fuse lage compartment sophisticated methods include custom fit bars various weights desired overall ballast can made up smaller modules Leadfilled brass tubes slide wings parallel close main sparswork well also However simple ballast solution acquire some small plastic bags Bags 5 inches 11/2 inches work very well added insurance against punctures take three bags put inside other Eight ounces shot produces soft lead packet approximately 3A inches rolling top bag over several times stapling fold have secure packet course packets can made up weight three four different sizes recommended allows combinations selecting over ballast weight soft packs have advantage being able absorb shock should hard landing occur pillowlike shape wont localize sudden load such bolted down lead bars overall effect much gentle treat ment sailplanes structure youre making ballast might want have wing-loading figures handy Make up chart three columns ballast weight wing loading Under ballast column put numbers ounces ballast might using varying conditions Under weight column list planes up weights respective ballast weights Next figures under wing loading list various respective figures Wing loading per square foot can easily computed dividing overall weight wing area square feet Tape chart under canopy floor ballast compartment ready reference As right combinations practice under varying wind condi tionscan determine Dan Pruss Rt 2 Box 490 Plainfield IL 60544 RC Helicopters/Schoonard Continued page 21 will make rapid descents quick stops tail moving inch Some may want mount pot collective servo am sure can done very neatly very simple method has permitted great deal experimenting re moving canopy seat will notice adding mix pot tail-rotor servo will increase servo travel Because will have move tail-rotor pushrod get travel accustomed creased travel tends make tail rotor touchy mix travel will have adjusted style flying may also have recenter tail-rotor servo pot bring mix tail rotor proper relationship Next months column will deal mod tail-rotor drive eliminates gear shaft wear clutch greatly increases power head Good luck tail-rotor mix youre flying youre trying Walt Schoonard 2080 Sharon Rd Winter Park FL 32789 Smith Miniplane Tailored 35 45 engine range Sigs kit famous homebuilt flown Maxey Hester firsts RC Sport Scale 76 Canadian Nats Multiwing Championships Span 44 area 650 sq Features too numerous mention include molded ABS plastic cowling wheel pants formed cabane struts formed aileron torque rods colorful decals pre-bent landing gear wires illustrated step-by-step structions Most complete hardware package includes aluminum motor mounts molded control hinges nylon bolts tailwheel bracket etc Design Mike Gretz Price $4995Sig Manufacturing Co Montezuma IA 50171 p roduct,viewprod uctreviewp rod u otroviwprodu Otroview 82 Model Aviation OUT- PERFORMS ALL OTHERS AT THE 1976 NATIONALS productrevieworoductreviworoduCtrevieWprOdoCtreVieW
Edition: Model Aviation - 1977/04
Page Numbers: 20, 81, 82
Soaring IDanPruss ITS BEEN SAID before its worth repeating being reminded thing sport has going it flexibility model design competition events further bear latter out Neal Nolte sent idea Bob Clarke along Cordova Model Masters used two contests past year task simply seven-minute pre cision duration spot landing bonus newcomers precision dura tion based point per second flight time up seven minutes Perfect flight score therefore would 420 points Now task itself isnt unique contestants highest lowest rounds scratched threw out bad air flight eliminated chance flier running away pack per haps goed luck flight As Nolte pointed out five rounds flying hi-b throw-out attacked same effects man-on-man one-on-one contests namely chance effects air variation Nolte further pointed out con tests can run less manpower frequency problems man-on-man contest As pointed out column some months back advan tages one-on-one concept Achilles heel system lies pos sibility two- three- four-way fly-off top spot fliers found same frequency two contests Cordova Model Masters held claim following 3540 contestants about 200 tows contest Four winches permitted con tests run less three onehalf hours both contests 30% flights over six one-half minutes 600-650 tow lines 16% flights high flights subse quently thrown out leaving 14% max flight figure day Interestingly winners both contests poor round being consistent other rounds able come out top Other advantages include simplified scorekeeping since type task being flown turn eliminates other scoring charts conversion tables contestants timers confused about what flown round further pointed out really sim plify scoring timers merely showed recorded flight stop watch scorekeepers time posted flier timer acknowledged time should prevent scoring irregularities negative side hi-b throw away system must realized fact longer contests meet must run efficient manner Five rounds seems minimum would practical considers three rounds would tallied 100-contestant show means 500 flights day day contest number has achieved before logistics such event become some concern considers further 200 40% flights will naught might take some convincing ole winchmaster 40% efforts will also go same value try own club level sure sounds like luck factorsgood badhave reduced should tighten spread scoreboard Nolte also sent expression two observation old bugaboospot landings noted back 19741975 LSF Tournaments landing zone concrete resulted scale-like approaches landings great majority flights attempted test durability hard ness runways three mix found balsa/fiberglass/Monokote came out very poor second Because us arent blessed landing zones Nolte suggested following pilot wants dork has accepted modelers vernacular describing landing closely resembles kamakaze attack results model closely akin full-size counterpart plane lets make highly probable breaks Ive chance try fol lowing landing area hope shortly pie-shaped wedge 30 40 degrees arc out common 25-foot radius part area laid out plywood edges leveled padded buried whatever no abrupt edges exposed rip wings noses projected distance out edge radii pylons made two A-in sq balsa pieces taped end end giving 5- 6-foot height after being pushed ground inch pylons shear easily ground level hit dont Continued page 81 Curled up wing tips distinguish Jim Porters original flight line SOAR Nats 20 Model Aviation Greg Seydel looks pessimistically over cast sky SOAR Nats Floyd Combs original design rviade ready flight 100 mph course two days flying time contest size its hard set things up other way facilities Winter Nats fan tastic takes place old WW-II base miles good runways end large aircraft stored various airlines strip also used forest service Would believe have WW-II B-17 equipped forest fire fighting well other modern aircraft purpose excellent cafeteria base well coffee sandwich shop right flight line end field contest held have attend ed contests coast coast cluding AMA Nats Tucson Winter Nats has have finest facili ties RC contest CDs dream Speaking CDs Bill Hempel Chuck Taylor people Tucson R/C Club commended fine job year side benefits Winter Nats Tucson fine Air Museum lot aircraft WW-II vintagemany need restoring exceptions B-24J reporter called home over 600 hours flying time back 4445 old Libby looks could take off right now aircraft dire need restoration out door museum started within last two three years have unusual aircraft such several large amphibians sev eral B-26s A-26 called WW II B-25s P-63 cargo craft including C-46 C-47 B29s course several early jets some interesting little-known helicopters Its gratifying after 30 years since WW II mood suppose money throughout country restore preserve possible aircraft era years following 1946 fine historical aircraft ended scrap pile lost forever especially true Japanese aircraft WW II famous standpoint infamous airplanes war Zero produced great numbers 1935 1945 country no airworthy Zeros left very few static ones WW-IIs Spitfires P-S ls ME-109s flying well-kept ma chines because shortsightedness no true Zerosonly makeshift AT-6-type Zeros Its truly shame want get chance full retract points should retract tail wheel did full-size bird old scale friend Lincoln Nebraska Don Neill has worked out very success ful retracting tail-wheel unit has used times latest su perb F6F Hellcat flew 1976 AMA Scale Nats have seen unit firsthand really works drawings speak themselves Bud Atkinson 734 North 6th Street Terrace Blue Springs MO 64015 RC Soaring/Pruss Continued page 20 disrupt flight path dont shear off Nolte goes further say 10-mph wind may too much balsa recently took part contest put Merced R/C used very impressed effectiveness Threading 12-foot wing through 15foot pylon gate rather fun too gain landing points Id propose pilot must enter through pylon gate touching land hard surface entire fuselage comes rest within wedge boundaries cuts out approach-fromany-angle -situation have now pylons demanding restricted approach line hard surface will foster smoother scale-like touchdowns rather crash dive Requiring entire fuselage inside wedge will force pilots maximize chances scoring landApril 1977 81 1st RC Masters Class 1st RC Advanced 1st RC Novice 1st RC Sport Scale 1st Formula Pylon 1st Quarter Midget Pylon 1st CL Stunt Open 1st CL Stunt Senior 1st CL Stunt Junior WORLD CHAMPIONSHIP 1976 AND 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 ClassCSpeedSr&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 BIADES OF HARD MAPLE WOOD * SUPERBLY FINISHED COMPLETELY FUEL PROOF SPECIAL PRO SERIES 2 FOR RC-FREE FLIGHT CONTROL LINE DIAPITCHPRICE 5%3499 e3499 733%4tie a3%45e129 94599A 77%139 10497149 10eW eW149 106EW159 114e77% 7I7%9159 11eEW199 11%E7i99 129179 125W179 1356219 14se249 1556309 194/9399 W WIDE BLADE 9W EXTRA WIDE SERIES 400 B FOR SPEED & RACING ADVANCED DESIGN NO1 IN PYLON RACING LEADING SPEED RECORD HOLDER OF ALL TIMES RC PYLON RACING CIA PITCH PRICE 5%3%4119 7 55/,9 129 7 SN 5AN eN 129 8% 9%9%7 7%7%199 9 9%7 747%199 CONTROL LINE SPEED & RACING DIA PITCH PRICE 4/947119 4%55119 9799%129 77% 10411139 999149 99N 9%N149 9%77%149 91213199 N NARROW ing farther out wedge trying slide farther point wedge Neil goes Finally dork landing now pays off long dont shed parts break something off dork point wedge isnt very likely produce score since dork usually result too much approach speed tends produce cartwheels ground loops should cases put some part fuselage outside boundary radii Taking Noltes figures 25-foot 30 degrees landing zone would about 164 square feet translates over five sheets -in plywood Cutting small enough sections ease transporting assembling joints wouldnt disrupt smooth landing might cause club field director some concern its worth try Get lead February issue column described proven method permanent nose ballast made B-B shot Since scribe has used B-B shot rather simple yet effec tive way make ballast modules improved L/D better penetrating capabilities wing loadings rela tively light adding ballast center gravity used method ballasting varies modelers Most common slug lead cut fit fuse lage compartment sophisticated methods include custom fit bars various weights desired overall ballast can made up smaller modules Leadfilled brass tubes slide wings parallel close main sparswork well also However simple ballast solution acquire some small plastic bags Bags 5 inches 11/2 inches work very well added insurance against punctures take three bags put inside other Eight ounces shot produces soft lead packet approximately 3A inches rolling top bag over several times stapling fold have secure packet course packets can made up weight three four different sizes recommended allows combinations selecting over ballast weight soft packs have advantage being able absorb shock should hard landing occur pillowlike shape wont localize sudden load such bolted down lead bars overall effect much gentle treat ment sailplanes structure youre making ballast might want have wing-loading figures handy Make up chart three columns ballast weight wing loading Under ballast column put numbers ounces ballast might using varying conditions Under weight column list planes up weights respective ballast weights Next figures under wing loading list various respective figures Wing loading per square foot can easily computed dividing overall weight wing area square feet Tape chart under canopy floor ballast compartment ready reference As right combinations practice under varying wind condi tionscan determine Dan Pruss Rt 2 Box 490 Plainfield IL 60544 RC Helicopters/Schoonard Continued page 21 will make rapid descents quick stops tail moving inch Some may want mount pot collective servo am sure can done very neatly very simple method has permitted great deal experimenting re moving canopy seat will notice adding mix pot tail-rotor servo will increase servo travel Because will have move tail-rotor pushrod get travel accustomed creased travel tends make tail rotor touchy mix travel will have adjusted style flying may also have recenter tail-rotor servo pot bring mix tail rotor proper relationship Next months column will deal mod tail-rotor drive eliminates gear shaft wear clutch greatly increases power head Good luck tail-rotor mix youre flying youre trying Walt Schoonard 2080 Sharon Rd Winter Park FL 32789 Smith Miniplane Tailored 35 45 engine range Sigs kit famous homebuilt flown Maxey Hester firsts RC Sport Scale 76 Canadian Nats Multiwing Championships Span 44 area 650 sq Features too numerous mention include molded ABS plastic cowling wheel pants formed cabane struts formed aileron torque rods colorful decals pre-bent landing gear wires illustrated step-by-step structions Most complete hardware package includes aluminum motor mounts molded control hinges nylon bolts tailwheel bracket etc Design Mike Gretz Price $4995Sig Manufacturing Co Montezuma IA 50171 p roduct,viewprod uctreviewp rod u otroviwprodu Otroview 82 Model Aviation OUT- PERFORMS ALL OTHERS AT THE 1976 NATIONALS productrevieworoductreviworoduCtrevieWprOdoCtreVieW