Radio Control SPORT AEROBA TICS Ron Van Putte THIS MONTH Id like tie up few loose ends several previous columns have couple topics generated com ments and/or questions readers may general interest first result letter Gary Sutton Ashby NE question about dihedraL reported can fly Sig Kadet upside down make very gradual turns Turning drawing upside down cant see works Most airplanes much dihedral wont stay upside down long will dihedral does strange thing rudder works just though airplane upright Figure 1 sketch what inverted airplane would look like viewed rear right rudder input Normally upright airplane right rudder would produce roll right right rudder inverted airplane dihedral will also make roll right explanation negative dihedral wing upside down causes re duction angle attack airplanes left wing corresponding increase angle attack right wing right rudder input made can visualize what happening hold ing book open inverted V yawing books right left must hold book angle attack would generate lift wing get proper perspective decrease lift left wing increase lift right wing caused difference angle attack two wing panels causes clockwise rolling moment generated tends roll airplane right So rudder-controlled airplane can probably rolled normally whether air plane upright inverted putting rudder command just like alleron command may have noted qualifier prob ably stuck previous sentence Thats because inverted airplane dihedral doesnt always roll right right rudder As discussed previous column right rudder causes counterclockwise moment gener ated vertical fin wing has insufficient dihedral airplane may roll left whether airplane upright inverted airplanes actions complicated fliers ever thought Reader questions comments propellers continue come Doug Dahlke Oshkosh WI has kept busy answering questions past letters propellers contained imalcombsi oxnw three questions Question 1 stated that. very little can done increase pressure bottom side airfoil angle attack shown increase rpm Surely will continue increase pres sure until compressibility problems encoun tered Question 2 Once perfect vacuum ob tained top surface no further thrust can generated thereall additional increases must come lower surface True Question 3 statement top blade provides vast majority thrust true according pressure diagrams guess- devil waste time pitchgaugesother relative sense numbers utterly irrelevant except comparing prop another answers Dougs questions Answer 1 Sure can increase pressure bottom side airfoil increasing rpm problem unless drag blade reduced engine doesnt have torque turn prop faster efficient airfoil sections managing three-dimensional effects blade tips better plays important part Answer 2 Sorry will never see perfect vacuum anything approaching top blade hypersonic speeds pressure will much less ambient Answer 3 simple answer impos sible build prop top Besides bottom surface does produce lower drag glven speed angle attack blade shaped like simple curve Gary Sutton Ashby NE sent another letter asking assistance since nearest club 125 miles away An excerpt letter follows have testing different props use Enya29 ona SigKadetwhichl am settingup STOL STOL t TakeOff Landing R VP want utilize power going such low pitch engine just screams did 10-35 yet does produce climb higher-pitch props gavethis surprised have enclosed list props tested crude manner use tach am about 4000 ft ASL Above Sea 40 Model Aviation Increa g heI%M e jat whiW fI Levet R VP using 15% fuel spring scale tied tail plane Enya 29 calls 10-in prop 11-in ones seem give best static thrust lose power once air larger props have sugges tions might help takeoff performance Gary included list 13 propellers tested highest static thrust 26 lb 11-5 Top Flite Super M prop other props tested static thrust 22 23 lb exception 10-35 Top Flite nylon prop tested 175 lb An excerpt what wrote back him follows must really boonies nearest club 125 miles away must problem get supplies arent hobby shops other modelers around Thats what makes extent experiments surprising have done lot work subject As have already discovered no simple answers problem Unfortunately lack tachometer will inhibit getting correct answer wont prevent getting will just take little longer probably already know plot curve power output versus engine speed will look something like Figure 2 Some engines have very broad power curve like shown others very sharp severe falloff power either side maximum-power rpm experience Enya engines has shown have very broad power curve will perform well number different props because nature power curve airplane flown speed could easily determine prop would enable engine operate rpm maximum power Unfortunately thats what want want start motionless condition perform short takeoff climb situation matching engine propeller difficult As have already learned possible determine best prop obtain maximum static thrust However soon airplane begins move angle attack prop begins decrease propeller rpm increases Depending good job prop selection have done thrust may increase decrease prop selected engine turning over rpm maximum power ground engine rpm increases airplane speed power available will decrease look Figure 2 thrust available will probably go downI say probably because whether does depends prop design also So what really need situation prop permits engine operate just below peak-power rpm ground still allows power orjust below its peak Continued page 103 p. SMALL NYLON HINGES HINGES nylon hinges e p ec son mo ded0 Just right size smaller air- nspected assembled Du-Bro 3 C planes Theyre easy install too byC kD C f50Insure finest Quality available En-0 tirely flash free tor smooth quiet Opera- using Du-Aro Kwik Hinge SlottingC ion simple install using a0 Device rigid nylon hinges embossed have 6 holes side6 e blade Du-Bro Kwik-Hinge mum holding power sate-6 6Slotter cat No 216 total holding0 power hinges embossed and0 ty hinge locked together thehave 6 holes side Safer factory checked smoothness ofremovable pinpin is0~ ationtype hinge ready locked place No118 6 SI00 No 119 l5eaNo 116 6 $110 No117 ll5ea KWIKHINGE SLOTTER FOR LARGE AND SMALL HINGES THE ORIGINAL UNIVERSAL SLOTING TOOL THAT NOT ONLY CENTERS BUT GUIGES YOUR BLAGE FOR PERFECTLY ALIIGNED HINGE SLOTS EVERY TIME Three hardened sleet Slack o,ded Saves fri neat y rn yox 50 2 eacto ie work fl Con unCirOt wrih Oat ordinal airdn meni rg Cvi edirres 3 rnietchangeaeie Snar gu des ice arge ieai hinges yen sinai ear S nges ann iv drniirng 3 sian darn sinde Sores match Common aerre sees miner hinges Thins drird-COmpivie Toni Sci ins vi ye air ese enna precinse hinge inhhtd idirOnS anninrog esita esOoid Se wdhie money OFII.AN FRVN MO eNOWOE eee Fe RO PRODUCTS INCORPORATED 480 Bonner Road Wauconda Illinois 60084 USA March 1982 41 mis sore ota came moaullruy-Ingocume pflffldp5J dunn riwus emyingousnouse ruiiy ala viny needed nearly full power remain airborne crashed engine ah stopped $195 Cut N. 216 DUBRO HEAVY DUTY HINGES With Removable o a Cotter Pin 1 0 C Shown acluat side hinges a, hair take Sevoy loads Dimes sons ate 314 wide 318 tueg OdO Sick csrvg 3i64 drameter cotiet pin 101 muatmam conoenreYce strengtS dear lId SCdiU medeis Pe PEg 375 Ne 25 j $89395 Maple Prop included Exhaust may positioned left right facing rearward Full Size FOX 19 BB-RC Engine Drawing available request runs great economical Fox Gold Star Fuel new FOX 19 BB-RC handstarts ease yet stressed radial loads imposed electric starters beltdrive spur gear systems two large 11mm Ball Bearings front rear Its got smooth low idle too years engine life known millionodd engines taught us covered Spraying techniques sequences vary part being finished its shape prefer ence wing example spray bottom first beginning edges followed flat surfaces wing too wide cover pass gun spray near side first gun held angle about 450 follow second pass along far side technique covers off-spray first pass wet coat second Repeat top surface after bottom has dried cold weather wet parts carried indoors drying Crumpled newspapers stuffed openings model spray should penetrate slow-drying materials epoxy example preferred spray top bottom same time part suspended manner can turned New ducted fan book us have impressed success ducted fan models Nats recent first place win Tom Cooks F-S Phantom Scale Masters Tournament new book Dick Sarpolus sums up what need know entry exciting phase Scale modeling book helps us get ducted fans having reinvent things others have already done Dick Sarpolus no stranger have reading magazines Forty designs have appeared construction articles book explains operation ducted fans lists accessories needed tells build fly ducted fan model planes book also contains up-to-date listing ducted fan units suitable engines currently available ducted fan air craft kits consists 52 magazine-size pages how-to text includes 1 34 photos drawings Dicks book titled Building Flting Ducted Fan RCA ircraft $695 avail able hobby shops book stores direct Kalmbach Books 1027 N 7th St. Milwaukee WI 53233 Include postage handling US $75 foreign $125 Bob andDolh Wiseher Rt 1 S-221 Lapham Peak Rd Delafield WI 53018 RC Aerobatics/Van Putte Continued page 41 rpm increases peak-power rpm moves through Obviously engine broad power curve definite advantage STOL operation because power output wont vary much rpm What rye written far hasnt really answered question can answer satisfactorily youby doing kinds experiments have done already practical way attack situation deter what prop gives static thrust youve done already try prop pitch diameter somewhat higher Probably best prop try same pitch larger diameter After determining static thrust untouched larger prop try trimming tips little bit time until get down diameter previous prop Since Top Flite 11-5 Super Maple superior static ally try 12-5 go After reading what just wrote started shaking head must potent Enya 29 have swing 11-5 prop used fly Enya 45 11-6 props years ago much bigger engine 29 Good luck Continued page 108 ANOTHER GREAT WINDER List $5625 Plus diipping JOHN MORRILLS SIDEWINDER Precision Built Heavy Duty Windert March 1982 103 18000 RPMs Hot Pertarmance tion CANADIAN HOBBY DEALERS von can now order Fox Model Products direct fac tory Standard discounts apply Freight Prepaid except fuel Most Fox Products should Tariff Free under provi sions Taritt Item 62435-1 Gall us write further details 535 Towson Ave Fort Smith Arkansas 72901 $100 FOR CATALOG CUSTOM TUNED ENGINES COMPETITION ACCESSORIES Specialists custom 70 049/051 reed engines Throttled TD available Complete inventory individual stock custom parts Cox 70 020 049 051 & 09 engines Exclusive distributor Nelson 15 engine parts Hard-to-get items such custom needle valves racing wheels quick fills fuel shut-a fis solid control lines others detailed brochure send 25 cents Kustom Kraftsmanship Box 2699 Laguna Hills CA 92653 Ph 714 830-5162 Tired flying same old thing fly future TIJNI3IJIAIFIrlF TOTALLY UNIQUE first its kind radio controlled ring wing aircraft having flight performance helicopter complexities A very complete precision kit can easily assembled ready operation 8 12 hours All required minimum standard 3 channel radio good 60 90 engine DEALER INQUIRIES INVITED FLYING SENSATION complete details contact FIJTIJNFLITEE 214 Dolomite Drive Downsview Ontario M3J 2P8416 661 5562 Matched Performance System TOP PERFORMANCE K&B ENGINES Airplane 4 Marine K&B FUELSK&B GLOW PLUGS 7 Blends4 choices Matched Finish System BEST APPEARANCE KAB FIBERGLASS CLOTH K&B Micro-Balloons FILLER KAB SUPER POXY RESIN K&B SUPER POXY THINNER K&B SUPER POXY PRIMER K&B SUPER POXY PAINT K&B MIXING CUPS club newsletters sent way AMA HQ found gem share contained Prop Wash newsletter Heart Texas Model Aircraft Club Waco TX suspect canoe else An edited version follows air craft manufacturers research facilities mili tary squadrons National Board Aircraft Improvement Subject effective military civilian aircraft constructions utilization following directives im plemented immediately reduce cost improve efficiency improve front line readiness 1 funding research will cease bullet proof balloon project 2 Concrete will used airframes despite its availability 3 Wagers shall conducted between designers within hearing test pilots 4 pilots encouraged raise wheels after aircraft airborne 5 Use sandbags engine test facilities encouraged Use sand desir able though straw makes bags easier handle 6 Parachutes should packed before leaving ground Attempting air asking trouble Ron Van Putte 111 Sleepy Oaks Rd Fort Walton Beach FL 32548 RC Pylon Racing/Hager Co ntinued page 42 May 31 Wichita Radio Control Club sponsored its two sanctioned Q-500 races beautiful day light winds out east-southeast elected set * 1 pylon up south end 400-ft runway Registration started 900 am race started 1000 am Atthe days end 14 entries seven out town seven Wichita Five out-of-towners Kansas City area Salina KS Emporia KS truly enjoyed day lots good comments well complete race nm thanks expertise CD Loren Tregellas day destined pro-Wichita three four trophies staying place ments awards ended up like i st CP Comegy-Wichita 2nd Jim Cox-Wichita 3rd Don Moden-Salina 4th Jerry Carley-Wichita Loeklng ahead looks though 1982 season going bit good better 1981 1982 Nats will held Lincoln NE should have more-or-less same crew Lincoln Seguin 1981 i 982 NMPRA Championship Race will somewhere Texas probably end October also looks like some clubs quit sponsoring some great races past getting back again have thinking getting racing now time get started As reading probably snowing outside nothing build up fleet racers 1982 need some help just look up local Pylon fliers Please keep contest reports pictures hints ideas coming will print can Bill Hager 706 Glen Haven Dr Conroe iX 773 02 read about Model Aviation writing advertisers mention 108 Model Aviation S ti1UIaIUtJ BALANLt IC ALL UIItUIIUNS Heres equipment yea need pine year props nery Best balance--balance directions Carefully crafted top grade materials BUBBLE BALAPJCER accomodates 3/181/49/32 prep holes Other sizes available en special order Dealers incited $1595 Add $15Bfnr HOWARD B HUEBL age handhng hr Mine add 4%oules tan No Ctllis Box 82 Ru B Mankeno MN 56001
Edition: Model Aviation - 1982/03
Page Numbers: 40, 41, 103, 108
Radio Control SPORT AEROBA TICS Ron Van Putte THIS MONTH Id like tie up few loose ends several previous columns have couple topics generated com ments and/or questions readers may general interest first result letter Gary Sutton Ashby NE question about dihedraL reported can fly Sig Kadet upside down make very gradual turns Turning drawing upside down cant see works Most airplanes much dihedral wont stay upside down long will dihedral does strange thing rudder works just though airplane upright Figure 1 sketch what inverted airplane would look like viewed rear right rudder input Normally upright airplane right rudder would produce roll right right rudder inverted airplane dihedral will also make roll right explanation negative dihedral wing upside down causes re duction angle attack airplanes left wing corresponding increase angle attack right wing right rudder input made can visualize what happening hold ing book open inverted V yawing books right left must hold book angle attack would generate lift wing get proper perspective decrease lift left wing increase lift right wing caused difference angle attack two wing panels causes clockwise rolling moment generated tends roll airplane right So rudder-controlled airplane can probably rolled normally whether air plane upright inverted putting rudder command just like alleron command may have noted qualifier prob ably stuck previous sentence Thats because inverted airplane dihedral doesnt always roll right right rudder As discussed previous column right rudder causes counterclockwise moment gener ated vertical fin wing has insufficient dihedral airplane may roll left whether airplane upright inverted airplanes actions complicated fliers ever thought Reader questions comments propellers continue come Doug Dahlke Oshkosh WI has kept busy answering questions past letters propellers contained imalcombsi oxnw three questions Question 1 stated that. very little can done increase pressure bottom side airfoil angle attack shown increase rpm Surely will continue increase pres sure until compressibility problems encoun tered Question 2 Once perfect vacuum ob tained top surface no further thrust can generated thereall additional increases must come lower surface True Question 3 statement top blade provides vast majority thrust true according pressure diagrams guess- devil waste time pitchgaugesother relative sense numbers utterly irrelevant except comparing prop another answers Dougs questions Answer 1 Sure can increase pressure bottom side airfoil increasing rpm problem unless drag blade reduced engine doesnt have torque turn prop faster efficient airfoil sections managing three-dimensional effects blade tips better plays important part Answer 2 Sorry will never see perfect vacuum anything approaching top blade hypersonic speeds pressure will much less ambient Answer 3 simple answer impos sible build prop top Besides bottom surface does produce lower drag glven speed angle attack blade shaped like simple curve Gary Sutton Ashby NE sent another letter asking assistance since nearest club 125 miles away An excerpt letter follows have testing different props use Enya29 ona SigKadetwhichl am settingup STOL STOL t TakeOff Landing R VP want utilize power going such low pitch engine just screams did 10-35 yet does produce climb higher-pitch props gavethis surprised have enclosed list props tested crude manner use tach am about 4000 ft ASL Above Sea 40 Model Aviation Increa g heI%M e jat whiW fI Levet R VP using 15% fuel spring scale tied tail plane Enya 29 calls 10-in prop 11-in ones seem give best static thrust lose power once air larger props have sugges tions might help takeoff performance Gary included list 13 propellers tested highest static thrust 26 lb 11-5 Top Flite Super M prop other props tested static thrust 22 23 lb exception 10-35 Top Flite nylon prop tested 175 lb An excerpt what wrote back him follows must really boonies nearest club 125 miles away must problem get supplies arent hobby shops other modelers around Thats what makes extent experiments surprising have done lot work subject As have already discovered no simple answers problem Unfortunately lack tachometer will inhibit getting correct answer wont prevent getting will just take little longer probably already know plot curve power output versus engine speed will look something like Figure 2 Some engines have very broad power curve like shown others very sharp severe falloff power either side maximum-power rpm experience Enya engines has shown have very broad power curve will perform well number different props because nature power curve airplane flown speed could easily determine prop would enable engine operate rpm maximum power Unfortunately thats what want want start motionless condition perform short takeoff climb situation matching engine propeller difficult As have already learned possible determine best prop obtain maximum static thrust However soon airplane begins move angle attack prop begins decrease propeller rpm increases Depending good job prop selection have done thrust may increase decrease prop selected engine turning over rpm maximum power ground engine rpm increases airplane speed power available will decrease look Figure 2 thrust available will probably go downI say probably because whether does depends prop design also So what really need situation prop permits engine operate just below peak-power rpm ground still allows power orjust below its peak Continued page 103 p. SMALL NYLON HINGES HINGES nylon hinges e p ec son mo ded0 Just right size smaller air- nspected assembled Du-Bro 3 C planes Theyre easy install too byC kD C f50Insure finest Quality available En-0 tirely flash free tor smooth quiet Opera- using Du-Aro Kwik Hinge SlottingC ion simple install using a0 Device rigid nylon hinges embossed have 6 holes side6 e blade Du-Bro Kwik-Hinge mum holding power sate-6 6Slotter cat No 216 total holding0 power hinges embossed and0 ty hinge locked together thehave 6 holes side Safer factory checked smoothness ofremovable pinpin is0~ ationtype hinge ready locked place No118 6 SI00 No 119 l5eaNo 116 6 $110 No117 ll5ea KWIKHINGE SLOTTER FOR LARGE AND SMALL HINGES THE ORIGINAL UNIVERSAL SLOTING TOOL THAT NOT ONLY CENTERS BUT GUIGES YOUR BLAGE FOR PERFECTLY ALIIGNED HINGE SLOTS EVERY TIME Three hardened sleet Slack o,ded Saves fri neat y rn yox 50 2 eacto ie work fl Con unCirOt wrih Oat ordinal airdn meni rg Cvi edirres 3 rnietchangeaeie Snar gu des ice arge ieai hinges yen sinai ear S nges ann iv drniirng 3 sian darn sinde Sores match Common aerre sees miner hinges Thins drird-COmpivie Toni Sci ins vi ye air ese enna precinse hinge inhhtd idirOnS anninrog esita esOoid Se wdhie money OFII.AN FRVN MO eNOWOE eee Fe RO PRODUCTS INCORPORATED 480 Bonner Road Wauconda Illinois 60084 USA March 1982 41 mis sore ota came moaullruy-Ingocume pflffldp5J dunn riwus emyingousnouse ruiiy ala viny needed nearly full power remain airborne crashed engine ah stopped $195 Cut N. 216 DUBRO HEAVY DUTY HINGES With Removable o a Cotter Pin 1 0 C Shown acluat side hinges a, hair take Sevoy loads Dimes sons ate 314 wide 318 tueg OdO Sick csrvg 3i64 drameter cotiet pin 101 muatmam conoenreYce strengtS dear lId SCdiU medeis Pe PEg 375 Ne 25 j $89395 Maple Prop included Exhaust may positioned left right facing rearward Full Size FOX 19 BB-RC Engine Drawing available request runs great economical Fox Gold Star Fuel new FOX 19 BB-RC handstarts ease yet stressed radial loads imposed electric starters beltdrive spur gear systems two large 11mm Ball Bearings front rear Its got smooth low idle too years engine life known millionodd engines taught us covered Spraying techniques sequences vary part being finished its shape prefer ence wing example spray bottom first beginning edges followed flat surfaces wing too wide cover pass gun spray near side first gun held angle about 450 follow second pass along far side technique covers off-spray first pass wet coat second Repeat top surface after bottom has dried cold weather wet parts carried indoors drying Crumpled newspapers stuffed openings model spray should penetrate slow-drying materials epoxy example preferred spray top bottom same time part suspended manner can turned New ducted fan book us have impressed success ducted fan models Nats recent first place win Tom Cooks F-S Phantom Scale Masters Tournament new book Dick Sarpolus sums up what need know entry exciting phase Scale modeling book helps us get ducted fans having reinvent things others have already done Dick Sarpolus no stranger have reading magazines Forty designs have appeared construction articles book explains operation ducted fans lists accessories needed tells build fly ducted fan model planes book also contains up-to-date listing ducted fan units suitable engines currently available ducted fan air craft kits consists 52 magazine-size pages how-to text includes 1 34 photos drawings Dicks book titled Building Flting Ducted Fan RCA ircraft $695 avail able hobby shops book stores direct Kalmbach Books 1027 N 7th St. Milwaukee WI 53233 Include postage handling US $75 foreign $125 Bob andDolh Wiseher Rt 1 S-221 Lapham Peak Rd Delafield WI 53018 RC Aerobatics/Van Putte Continued page 41 rpm increases peak-power rpm moves through Obviously engine broad power curve definite advantage STOL operation because power output wont vary much rpm What rye written far hasnt really answered question can answer satisfactorily youby doing kinds experiments have done already practical way attack situation deter what prop gives static thrust youve done already try prop pitch diameter somewhat higher Probably best prop try same pitch larger diameter After determining static thrust untouched larger prop try trimming tips little bit time until get down diameter previous prop Since Top Flite 11-5 Super Maple superior static ally try 12-5 go After reading what just wrote started shaking head must potent Enya 29 have swing 11-5 prop used fly Enya 45 11-6 props years ago much bigger engine 29 Good luck Continued page 108 ANOTHER GREAT WINDER List $5625 Plus diipping JOHN MORRILLS SIDEWINDER Precision Built Heavy Duty Windert March 1982 103 18000 RPMs Hot Pertarmance tion CANADIAN HOBBY DEALERS von can now order Fox Model Products direct fac tory Standard discounts apply Freight Prepaid except fuel Most Fox Products should Tariff Free under provi sions Taritt Item 62435-1 Gall us write further details 535 Towson Ave Fort Smith Arkansas 72901 $100 FOR CATALOG CUSTOM TUNED ENGINES COMPETITION ACCESSORIES Specialists custom 70 049/051 reed engines Throttled TD available Complete inventory individual stock custom parts Cox 70 020 049 051 & 09 engines Exclusive distributor Nelson 15 engine parts Hard-to-get items such custom needle valves racing wheels quick fills fuel shut-a fis solid control lines others detailed brochure send 25 cents Kustom Kraftsmanship Box 2699 Laguna Hills CA 92653 Ph 714 830-5162 Tired flying same old thing fly future TIJNI3IJIAIFIrlF TOTALLY UNIQUE first its kind radio controlled ring wing aircraft having flight performance helicopter complexities A very complete precision kit can easily assembled ready operation 8 12 hours All required minimum standard 3 channel radio good 60 90 engine DEALER INQUIRIES INVITED FLYING SENSATION complete details contact FIJTIJNFLITEE 214 Dolomite Drive Downsview Ontario M3J 2P8416 661 5562 Matched Performance System TOP PERFORMANCE K&B ENGINES Airplane 4 Marine K&B FUELSK&B GLOW PLUGS 7 Blends4 choices Matched Finish System BEST APPEARANCE KAB FIBERGLASS CLOTH K&B Micro-Balloons FILLER KAB SUPER POXY RESIN K&B SUPER POXY THINNER K&B SUPER POXY PRIMER K&B SUPER POXY PAINT K&B MIXING CUPS club newsletters sent way AMA HQ found gem share contained Prop Wash newsletter Heart Texas Model Aircraft Club Waco TX suspect canoe else An edited version follows air craft manufacturers research facilities mili tary squadrons National Board Aircraft Improvement Subject effective military civilian aircraft constructions utilization following directives im plemented immediately reduce cost improve efficiency improve front line readiness 1 funding research will cease bullet proof balloon project 2 Concrete will used airframes despite its availability 3 Wagers shall conducted between designers within hearing test pilots 4 pilots encouraged raise wheels after aircraft airborne 5 Use sandbags engine test facilities encouraged Use sand desir able though straw makes bags easier handle 6 Parachutes should packed before leaving ground Attempting air asking trouble Ron Van Putte 111 Sleepy Oaks Rd Fort Walton Beach FL 32548 RC Pylon Racing/Hager Co ntinued page 42 May 31 Wichita Radio Control Club sponsored its two sanctioned Q-500 races beautiful day light winds out east-southeast elected set * 1 pylon up south end 400-ft runway Registration started 900 am race started 1000 am Atthe days end 14 entries seven out town seven Wichita Five out-of-towners Kansas City area Salina KS Emporia KS truly enjoyed day lots good comments well complete race nm thanks expertise CD Loren Tregellas day destined pro-Wichita three four trophies staying place ments awards ended up like i st CP Comegy-Wichita 2nd Jim Cox-Wichita 3rd Don Moden-Salina 4th Jerry Carley-Wichita Loeklng ahead looks though 1982 season going bit good better 1981 1982 Nats will held Lincoln NE should have more-or-less same crew Lincoln Seguin 1981 i 982 NMPRA Championship Race will somewhere Texas probably end October also looks like some clubs quit sponsoring some great races past getting back again have thinking getting racing now time get started As reading probably snowing outside nothing build up fleet racers 1982 need some help just look up local Pylon fliers Please keep contest reports pictures hints ideas coming will print can Bill Hager 706 Glen Haven Dr Conroe iX 773 02 read about Model Aviation writing advertisers mention 108 Model Aviation S ti1UIaIUtJ BALANLt IC ALL UIItUIIUNS Heres equipment yea need pine year props nery Best balance--balance directions Carefully crafted top grade materials BUBBLE BALAPJCER accomodates 3/181/49/32 prep holes Other sizes available en special order Dealers incited $1595 Add $15Bfnr HOWARD B HUEBL age handhng hr Mine add 4%oules tan No Ctllis Box 82 Ru B Mankeno MN 56001
Edition: Model Aviation - 1982/03
Page Numbers: 40, 41, 103, 108
Radio Control SPORT AEROBA TICS Ron Van Putte THIS MONTH Id like tie up few loose ends several previous columns have couple topics generated com ments and/or questions readers may general interest first result letter Gary Sutton Ashby NE question about dihedraL reported can fly Sig Kadet upside down make very gradual turns Turning drawing upside down cant see works Most airplanes much dihedral wont stay upside down long will dihedral does strange thing rudder works just though airplane upright Figure 1 sketch what inverted airplane would look like viewed rear right rudder input Normally upright airplane right rudder would produce roll right right rudder inverted airplane dihedral will also make roll right explanation negative dihedral wing upside down causes re duction angle attack airplanes left wing corresponding increase angle attack right wing right rudder input made can visualize what happening hold ing book open inverted V yawing books right left must hold book angle attack would generate lift wing get proper perspective decrease lift left wing increase lift right wing caused difference angle attack two wing panels causes clockwise rolling moment generated tends roll airplane right So rudder-controlled airplane can probably rolled normally whether air plane upright inverted putting rudder command just like alleron command may have noted qualifier prob ably stuck previous sentence Thats because inverted airplane dihedral doesnt always roll right right rudder As discussed previous column right rudder causes counterclockwise moment gener ated vertical fin wing has insufficient dihedral airplane may roll left whether airplane upright inverted airplanes actions complicated fliers ever thought Reader questions comments propellers continue come Doug Dahlke Oshkosh WI has kept busy answering questions past letters propellers contained imalcombsi oxnw three questions Question 1 stated that. very little can done increase pressure bottom side airfoil angle attack shown increase rpm Surely will continue increase pres sure until compressibility problems encoun tered Question 2 Once perfect vacuum ob tained top surface no further thrust can generated thereall additional increases must come lower surface True Question 3 statement top blade provides vast majority thrust true according pressure diagrams guess- devil waste time pitchgaugesother relative sense numbers utterly irrelevant except comparing prop another answers Dougs questions Answer 1 Sure can increase pressure bottom side airfoil increasing rpm problem unless drag blade reduced engine doesnt have torque turn prop faster efficient airfoil sections managing three-dimensional effects blade tips better plays important part Answer 2 Sorry will never see perfect vacuum anything approaching top blade hypersonic speeds pressure will much less ambient Answer 3 simple answer impos sible build prop top Besides bottom surface does produce lower drag glven speed angle attack blade shaped like simple curve Gary Sutton Ashby NE sent another letter asking assistance since nearest club 125 miles away An excerpt letter follows have testing different props use Enya29 ona SigKadetwhichl am settingup STOL STOL t TakeOff Landing R VP want utilize power going such low pitch engine just screams did 10-35 yet does produce climb higher-pitch props gavethis surprised have enclosed list props tested crude manner use tach am about 4000 ft ASL Above Sea 40 Model Aviation Increa g heI%M e jat whiW fI Levet R VP using 15% fuel spring scale tied tail plane Enya 29 calls 10-in prop 11-in ones seem give best static thrust lose power once air larger props have sugges tions might help takeoff performance Gary included list 13 propellers tested highest static thrust 26 lb 11-5 Top Flite Super M prop other props tested static thrust 22 23 lb exception 10-35 Top Flite nylon prop tested 175 lb An excerpt what wrote back him follows must really boonies nearest club 125 miles away must problem get supplies arent hobby shops other modelers around Thats what makes extent experiments surprising have done lot work subject As have already discovered no simple answers problem Unfortunately lack tachometer will inhibit getting correct answer wont prevent getting will just take little longer probably already know plot curve power output versus engine speed will look something like Figure 2 Some engines have very broad power curve like shown others very sharp severe falloff power either side maximum-power rpm experience Enya engines has shown have very broad power curve will perform well number different props because nature power curve airplane flown speed could easily determine prop would enable engine operate rpm maximum power Unfortunately thats what want want start motionless condition perform short takeoff climb situation matching engine propeller difficult As have already learned possible determine best prop obtain maximum static thrust However soon airplane begins move angle attack prop begins decrease propeller rpm increases Depending good job prop selection have done thrust may increase decrease prop selected engine turning over rpm maximum power ground engine rpm increases airplane speed power available will decrease look Figure 2 thrust available will probably go downI say probably because whether does depends prop design also So what really need situation prop permits engine operate just below peak-power rpm ground still allows power orjust below its peak Continued page 103 p. SMALL NYLON HINGES HINGES nylon hinges e p ec son mo ded0 Just right size smaller air- nspected assembled Du-Bro 3 C planes Theyre easy install too byC kD C f50Insure finest Quality available En-0 tirely flash free tor smooth quiet Opera- using Du-Aro Kwik Hinge SlottingC ion simple install using a0 Device rigid nylon hinges embossed have 6 holes side6 e blade Du-Bro Kwik-Hinge mum holding power sate-6 6Slotter cat No 216 total holding0 power hinges embossed and0 ty hinge locked together thehave 6 holes side Safer factory checked smoothness ofremovable pinpin is0~ ationtype hinge ready locked place No118 6 SI00 No 119 l5eaNo 116 6 $110 No117 ll5ea KWIKHINGE SLOTTER FOR LARGE AND SMALL HINGES THE ORIGINAL UNIVERSAL SLOTING TOOL THAT NOT ONLY CENTERS BUT GUIGES YOUR BLAGE FOR PERFECTLY ALIIGNED HINGE SLOTS EVERY TIME Three hardened sleet Slack o,ded Saves fri neat y rn yox 50 2 eacto ie work fl Con unCirOt wrih Oat ordinal airdn meni rg Cvi edirres 3 rnietchangeaeie Snar gu des ice arge ieai hinges yen sinai ear S nges ann iv drniirng 3 sian darn sinde Sores match Common aerre sees miner hinges Thins drird-COmpivie Toni Sci ins vi ye air ese enna precinse hinge inhhtd idirOnS anninrog esita esOoid Se wdhie money OFII.AN FRVN MO eNOWOE eee Fe RO PRODUCTS INCORPORATED 480 Bonner Road Wauconda Illinois 60084 USA March 1982 41 mis sore ota came moaullruy-Ingocume pflffldp5J dunn riwus emyingousnouse ruiiy ala viny needed nearly full power remain airborne crashed engine ah stopped $195 Cut N. 216 DUBRO HEAVY DUTY HINGES With Removable o a Cotter Pin 1 0 C Shown acluat side hinges a, hair take Sevoy loads Dimes sons ate 314 wide 318 tueg OdO Sick csrvg 3i64 drameter cotiet pin 101 muatmam conoenreYce strengtS dear lId SCdiU medeis Pe PEg 375 Ne 25 j $89395 Maple Prop included Exhaust may positioned left right facing rearward Full Size FOX 19 BB-RC Engine Drawing available request runs great economical Fox Gold Star Fuel new FOX 19 BB-RC handstarts ease yet stressed radial loads imposed electric starters beltdrive spur gear systems two large 11mm Ball Bearings front rear Its got smooth low idle too years engine life known millionodd engines taught us covered Spraying techniques sequences vary part being finished its shape prefer ence wing example spray bottom first beginning edges followed flat surfaces wing too wide cover pass gun spray near side first gun held angle about 450 follow second pass along far side technique covers off-spray first pass wet coat second Repeat top surface after bottom has dried cold weather wet parts carried indoors drying Crumpled newspapers stuffed openings model spray should penetrate slow-drying materials epoxy example preferred spray top bottom same time part suspended manner can turned New ducted fan book us have impressed success ducted fan models Nats recent first place win Tom Cooks F-S Phantom Scale Masters Tournament new book Dick Sarpolus sums up what need know entry exciting phase Scale modeling book helps us get ducted fans having reinvent things others have already done Dick Sarpolus no stranger have reading magazines Forty designs have appeared construction articles book explains operation ducted fans lists accessories needed tells build fly ducted fan model planes book also contains up-to-date listing ducted fan units suitable engines currently available ducted fan air craft kits consists 52 magazine-size pages how-to text includes 1 34 photos drawings Dicks book titled Building Flting Ducted Fan RCA ircraft $695 avail able hobby shops book stores direct Kalmbach Books 1027 N 7th St. Milwaukee WI 53233 Include postage handling US $75 foreign $125 Bob andDolh Wiseher Rt 1 S-221 Lapham Peak Rd Delafield WI 53018 RC Aerobatics/Van Putte Continued page 41 rpm increases peak-power rpm moves through Obviously engine broad power curve definite advantage STOL operation because power output wont vary much rpm What rye written far hasnt really answered question can answer satisfactorily youby doing kinds experiments have done already practical way attack situation deter what prop gives static thrust youve done already try prop pitch diameter somewhat higher Probably best prop try same pitch larger diameter After determining static thrust untouched larger prop try trimming tips little bit time until get down diameter previous prop Since Top Flite 11-5 Super Maple superior static ally try 12-5 go After reading what just wrote started shaking head must potent Enya 29 have swing 11-5 prop used fly Enya 45 11-6 props years ago much bigger engine 29 Good luck Continued page 108 ANOTHER GREAT WINDER List $5625 Plus diipping JOHN MORRILLS SIDEWINDER Precision Built Heavy Duty Windert March 1982 103 18000 RPMs Hot Pertarmance tion CANADIAN HOBBY DEALERS von can now order Fox Model Products direct fac tory Standard discounts apply Freight Prepaid except fuel Most Fox Products should Tariff Free under provi sions Taritt Item 62435-1 Gall us write further details 535 Towson Ave Fort Smith Arkansas 72901 $100 FOR CATALOG CUSTOM TUNED ENGINES COMPETITION ACCESSORIES Specialists custom 70 049/051 reed engines Throttled TD available Complete inventory individual stock custom parts Cox 70 020 049 051 & 09 engines Exclusive distributor Nelson 15 engine parts Hard-to-get items such custom needle valves racing wheels quick fills fuel shut-a fis solid control lines others detailed brochure send 25 cents Kustom Kraftsmanship Box 2699 Laguna Hills CA 92653 Ph 714 830-5162 Tired flying same old thing fly future TIJNI3IJIAIFIrlF TOTALLY UNIQUE first its kind radio controlled ring wing aircraft having flight performance helicopter complexities A very complete precision kit can easily assembled ready operation 8 12 hours All required minimum standard 3 channel radio good 60 90 engine DEALER INQUIRIES INVITED FLYING SENSATION complete details contact FIJTIJNFLITEE 214 Dolomite Drive Downsview Ontario M3J 2P8416 661 5562 Matched Performance System TOP PERFORMANCE K&B ENGINES Airplane 4 Marine K&B FUELSK&B GLOW PLUGS 7 Blends4 choices Matched Finish System BEST APPEARANCE KAB FIBERGLASS CLOTH K&B Micro-Balloons FILLER KAB SUPER POXY RESIN K&B SUPER POXY THINNER K&B SUPER POXY PRIMER K&B SUPER POXY PAINT K&B MIXING CUPS club newsletters sent way AMA HQ found gem share contained Prop Wash newsletter Heart Texas Model Aircraft Club Waco TX suspect canoe else An edited version follows air craft manufacturers research facilities mili tary squadrons National Board Aircraft Improvement Subject effective military civilian aircraft constructions utilization following directives im plemented immediately reduce cost improve efficiency improve front line readiness 1 funding research will cease bullet proof balloon project 2 Concrete will used airframes despite its availability 3 Wagers shall conducted between designers within hearing test pilots 4 pilots encouraged raise wheels after aircraft airborne 5 Use sandbags engine test facilities encouraged Use sand desir able though straw makes bags easier handle 6 Parachutes should packed before leaving ground Attempting air asking trouble Ron Van Putte 111 Sleepy Oaks Rd Fort Walton Beach FL 32548 RC Pylon Racing/Hager Co ntinued page 42 May 31 Wichita Radio Control Club sponsored its two sanctioned Q-500 races beautiful day light winds out east-southeast elected set * 1 pylon up south end 400-ft runway Registration started 900 am race started 1000 am Atthe days end 14 entries seven out town seven Wichita Five out-of-towners Kansas City area Salina KS Emporia KS truly enjoyed day lots good comments well complete race nm thanks expertise CD Loren Tregellas day destined pro-Wichita three four trophies staying place ments awards ended up like i st CP Comegy-Wichita 2nd Jim Cox-Wichita 3rd Don Moden-Salina 4th Jerry Carley-Wichita Loeklng ahead looks though 1982 season going bit good better 1981 1982 Nats will held Lincoln NE should have more-or-less same crew Lincoln Seguin 1981 i 982 NMPRA Championship Race will somewhere Texas probably end October also looks like some clubs quit sponsoring some great races past getting back again have thinking getting racing now time get started As reading probably snowing outside nothing build up fleet racers 1982 need some help just look up local Pylon fliers Please keep contest reports pictures hints ideas coming will print can Bill Hager 706 Glen Haven Dr Conroe iX 773 02 read about Model Aviation writing advertisers mention 108 Model Aviation S ti1UIaIUtJ BALANLt IC ALL UIItUIIUNS Heres equipment yea need pine year props nery Best balance--balance directions Carefully crafted top grade materials BUBBLE BALAPJCER accomodates 3/181/49/32 prep holes Other sizes available en special order Dealers incited $1595 Add $15Bfnr HOWARD B HUEBL age handhng hr Mine add 4%oules tan No Ctllis Box 82 Ru B Mankeno MN 56001
Edition: Model Aviation - 1982/03
Page Numbers: 40, 41, 103, 108
Radio Control SPORT AEROBA TICS Ron Van Putte THIS MONTH Id like tie up few loose ends several previous columns have couple topics generated com ments and/or questions readers may general interest first result letter Gary Sutton Ashby NE question about dihedraL reported can fly Sig Kadet upside down make very gradual turns Turning drawing upside down cant see works Most airplanes much dihedral wont stay upside down long will dihedral does strange thing rudder works just though airplane upright Figure 1 sketch what inverted airplane would look like viewed rear right rudder input Normally upright airplane right rudder would produce roll right right rudder inverted airplane dihedral will also make roll right explanation negative dihedral wing upside down causes re duction angle attack airplanes left wing corresponding increase angle attack right wing right rudder input made can visualize what happening hold ing book open inverted V yawing books right left must hold book angle attack would generate lift wing get proper perspective decrease lift left wing increase lift right wing caused difference angle attack two wing panels causes clockwise rolling moment generated tends roll airplane right So rudder-controlled airplane can probably rolled normally whether air plane upright inverted putting rudder command just like alleron command may have noted qualifier prob ably stuck previous sentence Thats because inverted airplane dihedral doesnt always roll right right rudder As discussed previous column right rudder causes counterclockwise moment gener ated vertical fin wing has insufficient dihedral airplane may roll left whether airplane upright inverted airplanes actions complicated fliers ever thought Reader questions comments propellers continue come Doug Dahlke Oshkosh WI has kept busy answering questions past letters propellers contained imalcombsi oxnw three questions Question 1 stated that. very little can done increase pressure bottom side airfoil angle attack shown increase rpm Surely will continue increase pres sure until compressibility problems encoun tered Question 2 Once perfect vacuum ob tained top surface no further thrust can generated thereall additional increases must come lower surface True Question 3 statement top blade provides vast majority thrust true according pressure diagrams guess- devil waste time pitchgaugesother relative sense numbers utterly irrelevant except comparing prop another answers Dougs questions Answer 1 Sure can increase pressure bottom side airfoil increasing rpm problem unless drag blade reduced engine doesnt have torque turn prop faster efficient airfoil sections managing three-dimensional effects blade tips better plays important part Answer 2 Sorry will never see perfect vacuum anything approaching top blade hypersonic speeds pressure will much less ambient Answer 3 simple answer impos sible build prop top Besides bottom surface does produce lower drag glven speed angle attack blade shaped like simple curve Gary Sutton Ashby NE sent another letter asking assistance since nearest club 125 miles away An excerpt letter follows have testing different props use Enya29 ona SigKadetwhichl am settingup STOL STOL t TakeOff Landing R VP want utilize power going such low pitch engine just screams did 10-35 yet does produce climb higher-pitch props gavethis surprised have enclosed list props tested crude manner use tach am about 4000 ft ASL Above Sea 40 Model Aviation Increa g heI%M e jat whiW fI Levet R VP using 15% fuel spring scale tied tail plane Enya 29 calls 10-in prop 11-in ones seem give best static thrust lose power once air larger props have sugges tions might help takeoff performance Gary included list 13 propellers tested highest static thrust 26 lb 11-5 Top Flite Super M prop other props tested static thrust 22 23 lb exception 10-35 Top Flite nylon prop tested 175 lb An excerpt what wrote back him follows must really boonies nearest club 125 miles away must problem get supplies arent hobby shops other modelers around Thats what makes extent experiments surprising have done lot work subject As have already discovered no simple answers problem Unfortunately lack tachometer will inhibit getting correct answer wont prevent getting will just take little longer probably already know plot curve power output versus engine speed will look something like Figure 2 Some engines have very broad power curve like shown others very sharp severe falloff power either side maximum-power rpm experience Enya engines has shown have very broad power curve will perform well number different props because nature power curve airplane flown speed could easily determine prop would enable engine operate rpm maximum power Unfortunately thats what want want start motionless condition perform short takeoff climb situation matching engine propeller difficult As have already learned possible determine best prop obtain maximum static thrust However soon airplane begins move angle attack prop begins decrease propeller rpm increases Depending good job prop selection have done thrust may increase decrease prop selected engine turning over rpm maximum power ground engine rpm increases airplane speed power available will decrease look Figure 2 thrust available will probably go downI say probably because whether does depends prop design also So what really need situation prop permits engine operate just below peak-power rpm ground still allows power orjust below its peak Continued page 103 p. SMALL NYLON HINGES HINGES nylon hinges e p ec son mo ded0 Just right size smaller air- nspected assembled Du-Bro 3 C planes Theyre easy install too byC kD C f50Insure finest Quality available En-0 tirely flash free tor smooth quiet Opera- using Du-Aro Kwik Hinge SlottingC ion simple install using a0 Device rigid nylon hinges embossed have 6 holes side6 e blade Du-Bro Kwik-Hinge mum holding power sate-6 6Slotter cat No 216 total holding0 power hinges embossed and0 ty hinge locked together thehave 6 holes side Safer factory checked smoothness ofremovable pinpin is0~ ationtype hinge ready locked place No118 6 SI00 No 119 l5eaNo 116 6 $110 No117 ll5ea KWIKHINGE SLOTTER FOR LARGE AND SMALL HINGES THE ORIGINAL UNIVERSAL SLOTING TOOL THAT NOT ONLY CENTERS BUT GUIGES YOUR BLAGE FOR PERFECTLY ALIIGNED HINGE SLOTS EVERY TIME Three hardened sleet Slack o,ded Saves fri neat y rn yox 50 2 eacto ie work fl Con unCirOt wrih Oat ordinal airdn meni rg Cvi edirres 3 rnietchangeaeie Snar gu des ice arge ieai hinges yen sinai ear S nges ann iv drniirng 3 sian darn sinde Sores match Common aerre sees miner hinges Thins drird-COmpivie Toni Sci ins vi ye air ese enna precinse hinge inhhtd idirOnS anninrog esita esOoid Se wdhie money OFII.AN FRVN MO eNOWOE eee Fe RO PRODUCTS INCORPORATED 480 Bonner Road Wauconda Illinois 60084 USA March 1982 41 mis sore ota came moaullruy-Ingocume pflffldp5J dunn riwus emyingousnouse ruiiy ala viny needed nearly full power remain airborne crashed engine ah stopped $195 Cut N. 216 DUBRO HEAVY DUTY HINGES With Removable o a Cotter Pin 1 0 C Shown acluat side hinges a, hair take Sevoy loads Dimes sons ate 314 wide 318 tueg OdO Sick csrvg 3i64 drameter cotiet pin 101 muatmam conoenreYce strengtS dear lId SCdiU medeis Pe PEg 375 Ne 25 j $89395 Maple Prop included Exhaust may positioned left right facing rearward Full Size FOX 19 BB-RC Engine Drawing available request runs great economical Fox Gold Star Fuel new FOX 19 BB-RC handstarts ease yet stressed radial loads imposed electric starters beltdrive spur gear systems two large 11mm Ball Bearings front rear Its got smooth low idle too years engine life known millionodd engines taught us covered Spraying techniques sequences vary part being finished its shape prefer ence wing example spray bottom first beginning edges followed flat surfaces wing too wide cover pass gun spray near side first gun held angle about 450 follow second pass along far side technique covers off-spray first pass wet coat second Repeat top surface after bottom has dried cold weather wet parts carried indoors drying Crumpled newspapers stuffed openings model spray should penetrate slow-drying materials epoxy example preferred spray top bottom same time part suspended manner can turned New ducted fan book us have impressed success ducted fan models Nats recent first place win Tom Cooks F-S Phantom Scale Masters Tournament new book Dick Sarpolus sums up what need know entry exciting phase Scale modeling book helps us get ducted fans having reinvent things others have already done Dick Sarpolus no stranger have reading magazines Forty designs have appeared construction articles book explains operation ducted fans lists accessories needed tells build fly ducted fan model planes book also contains up-to-date listing ducted fan units suitable engines currently available ducted fan air craft kits consists 52 magazine-size pages how-to text includes 1 34 photos drawings Dicks book titled Building Flting Ducted Fan RCA ircraft $695 avail able hobby shops book stores direct Kalmbach Books 1027 N 7th St. Milwaukee WI 53233 Include postage handling US $75 foreign $125 Bob andDolh Wiseher Rt 1 S-221 Lapham Peak Rd Delafield WI 53018 RC Aerobatics/Van Putte Continued page 41 rpm increases peak-power rpm moves through Obviously engine broad power curve definite advantage STOL operation because power output wont vary much rpm What rye written far hasnt really answered question can answer satisfactorily youby doing kinds experiments have done already practical way attack situation deter what prop gives static thrust youve done already try prop pitch diameter somewhat higher Probably best prop try same pitch larger diameter After determining static thrust untouched larger prop try trimming tips little bit time until get down diameter previous prop Since Top Flite 11-5 Super Maple superior static ally try 12-5 go After reading what just wrote started shaking head must potent Enya 29 have swing 11-5 prop used fly Enya 45 11-6 props years ago much bigger engine 29 Good luck Continued page 108 ANOTHER GREAT WINDER List $5625 Plus diipping JOHN MORRILLS SIDEWINDER Precision Built Heavy Duty Windert March 1982 103 18000 RPMs Hot Pertarmance tion CANADIAN HOBBY DEALERS von can now order Fox Model Products direct fac tory Standard discounts apply Freight Prepaid except fuel Most Fox Products should Tariff Free under provi sions Taritt Item 62435-1 Gall us write further details 535 Towson Ave Fort Smith Arkansas 72901 $100 FOR CATALOG CUSTOM TUNED ENGINES COMPETITION ACCESSORIES Specialists custom 70 049/051 reed engines Throttled TD available Complete inventory individual stock custom parts Cox 70 020 049 051 & 09 engines Exclusive distributor Nelson 15 engine parts Hard-to-get items such custom needle valves racing wheels quick fills fuel shut-a fis solid control lines others detailed brochure send 25 cents Kustom Kraftsmanship Box 2699 Laguna Hills CA 92653 Ph 714 830-5162 Tired flying same old thing fly future TIJNI3IJIAIFIrlF TOTALLY UNIQUE first its kind radio controlled ring wing aircraft having flight performance helicopter complexities A very complete precision kit can easily assembled ready operation 8 12 hours All required minimum standard 3 channel radio good 60 90 engine DEALER INQUIRIES INVITED FLYING SENSATION complete details contact FIJTIJNFLITEE 214 Dolomite Drive Downsview Ontario M3J 2P8416 661 5562 Matched Performance System TOP PERFORMANCE K&B ENGINES Airplane 4 Marine K&B FUELSK&B GLOW PLUGS 7 Blends4 choices Matched Finish System BEST APPEARANCE KAB FIBERGLASS CLOTH K&B Micro-Balloons FILLER KAB SUPER POXY RESIN K&B SUPER POXY THINNER K&B SUPER POXY PRIMER K&B SUPER POXY PAINT K&B MIXING CUPS club newsletters sent way AMA HQ found gem share contained Prop Wash newsletter Heart Texas Model Aircraft Club Waco TX suspect canoe else An edited version follows air craft manufacturers research facilities mili tary squadrons National Board Aircraft Improvement Subject effective military civilian aircraft constructions utilization following directives im plemented immediately reduce cost improve efficiency improve front line readiness 1 funding research will cease bullet proof balloon project 2 Concrete will used airframes despite its availability 3 Wagers shall conducted between designers within hearing test pilots 4 pilots encouraged raise wheels after aircraft airborne 5 Use sandbags engine test facilities encouraged Use sand desir able though straw makes bags easier handle 6 Parachutes should packed before leaving ground Attempting air asking trouble Ron Van Putte 111 Sleepy Oaks Rd Fort Walton Beach FL 32548 RC Pylon Racing/Hager Co ntinued page 42 May 31 Wichita Radio Control Club sponsored its two sanctioned Q-500 races beautiful day light winds out east-southeast elected set * 1 pylon up south end 400-ft runway Registration started 900 am race started 1000 am Atthe days end 14 entries seven out town seven Wichita Five out-of-towners Kansas City area Salina KS Emporia KS truly enjoyed day lots good comments well complete race nm thanks expertise CD Loren Tregellas day destined pro-Wichita three four trophies staying place ments awards ended up like i st CP Comegy-Wichita 2nd Jim Cox-Wichita 3rd Don Moden-Salina 4th Jerry Carley-Wichita Loeklng ahead looks though 1982 season going bit good better 1981 1982 Nats will held Lincoln NE should have more-or-less same crew Lincoln Seguin 1981 i 982 NMPRA Championship Race will somewhere Texas probably end October also looks like some clubs quit sponsoring some great races past getting back again have thinking getting racing now time get started As reading probably snowing outside nothing build up fleet racers 1982 need some help just look up local Pylon fliers Please keep contest reports pictures hints ideas coming will print can Bill Hager 706 Glen Haven Dr Conroe iX 773 02 read about Model Aviation writing advertisers mention 108 Model Aviation S ti1UIaIUtJ BALANLt IC ALL UIItUIIUNS Heres equipment yea need pine year props nery Best balance--balance directions Carefully crafted top grade materials BUBBLE BALAPJCER accomodates 3/181/49/32 prep holes Other sizes available en special order Dealers incited $1595 Add $15Bfnr HOWARD B HUEBL age handhng hr Mine add 4%oules tan No Ctllis Box 82 Ru B Mankeno MN 56001