Radio Control Pylon Racing Bill Hager HAPPY New Year indications 1985 should great year Pylon Racing Quarter Midget making come back Formula just strong ever Q-500 have received several inquiries FAI have read lot different articles props have received some very inter esting information fellow flier does very well Racing wishes remain anonymous what writes interesting am going pass So goes Just read article about what props have used relative geographic location January 1984 issue dis cussion will use prop names sizes reference points am firm believer what works wont work another planes identical respects After about two three years asking wont prop same just took otT being very envious passed time Ijust sat down started thinking problem solve good Quality Control Manager should initial thoughts 1 Flying experience counts cant fly plane belongs start working problem 2 Building expertise needed well-built planes go faster 3 prop very important assuming have competitive engine Well spent winter building right spent lot time practicing icing buddi don about d learn gn once things started falling place done anything except balance make sure props same pitch both sides first years end result about 20-second drop time 500 15-second drop time Formula I knew could go faster still problem does prop much better So following winter spent making props good pitch gauge collected different props everyone went other way saw coming main center concentration props Zinger Rev-Up sizes related Q-500 Formula Iand also props knew did what So big thing test Well winter wasnt about go out cold test props Besides what would tell couldnt find out indoors So what done Finally found electric motor old Singer sewing machine used because proper shaft size put prop drive K&B 40 used lightdimmer switch control rpm Boy did sucker turn prop first time put Rev-Up 9-7 turned instant clean basement nothing left walls After airflow problem correc ted via open-door policy knew what rpm prop would turn respect its actual pitch using Prather pitch gauge Note pitch gauge means something person uses pitch gauges equal So set out plot pitch vs rpm Well didnt tell much least next step true balance propsif remember right about 20 done rpm Continued page 155 Dallas RC Clubs Race Against Cancer raised $13000 contributions American Cancer SocIety Weii bet fiying site neighbors compiained about noise after performance iike ieft Danny Baii caller Wayne Cox during race Danny sponsored himacif $100 Race Against Cancer foiks R L R Drew Jerena Dailas RC Ciub President John Gui Vai Marchesoni Matt Smith Western band played runway dance held Race Against Cancer Photos Randolph 58 Model Aviation RC Giant Scale/Beckman Continued page 57 glue especially consider stresses will see rough landing point seems obvious want get some glue working us joint Some people try using big globs glue fill cor ners two pieces meet adds weight strength since glue designed hold two pieces something else together itself very strong Dont make mistake think ing what just said doesnt apply epoxy does What needed crease total area glued joint Thats gussets come Take another look definition gusset talks about bracket plate. implies least two types gussets applica tion bracket corresponds piece material fitted glued angles between two structural members plate flat piece material glued surface both members spanning joint pictures can see gussets plate type Bracket fill-in type gussets have uses cases prefer plates mind fill-ins have two strikes against First trying get maximum glued area should thick structural members case t balsa would indicated Second joint requires least two sometimes three four carefully-fitted pieces Thats lot time-consuming work plates other hand piece per joint needed little fitting required Plates can quite thin since gluing area surface edge course material used must have good tensile strength favorite 42-in plywood has strength needed application can easily cut pair scissors took about two minutes prepare gussets Sparrowhawk used combination square draw bunch one-inch squares 6 x 12-in sheet plywood drew diagonals through squares easy job 450 head combination square cut Out triangular gussets scissors few rectangular pieces needed done just easily Youll note gussets outside framework gives maximum strength least amount work Since formers needed final fuselage shape simply included thickness gussets cutting formers fit framework sometimes case framework itself outer surface fuselage might want have gussets show ing case might want use bracket fill-in type gusset Plates can used inside framework have some real dis * TPLANS * AR Baby 7j Especially Turn-around thi 850 sq 120 9 cycle powered Ron Chidgey design smooth solid performer Rib templates computer plotted Plans construction hints $1190 TIGER TAIL 4 Ron Chidgeys latest best series little larger lighter slower retains honest flight characteristics its predecess ors Plans construction hints WELLER 3 BLADE FIBERGLASS PROP Proven ih Nats Interna tional competition 7319 $2000 IVANS MAGIC GADGET protractor device used Ivan Krletensen accurately measu-e aileron elevator arfd rucder throw Takes guess work Out trimming Out airplane quality tool complete instructions log book carrying case SEE YOUR DEALER OR OREItK DIRECT advantages first completely internal gusset arrangement can reinforce plane struc ture corner example could use internal plate gussets strengthen sides framework would have use either external plates brackets reinforce top bottom points crossmembers line vertical members final point Ive often seen gussets shown sections circles dont see advantage same size gusset difference gluing area significant compared work involved second Sparrowhawk picture month shows final rigid gusseted framework fleshed out lightweight formers stringers also shows that time making some progress responding advertisers mention read about Model Aviation WING TUBE & SOCKETS Aluminum alloy tubing plugin wings Included pair special slipfit phenolic sockets build wing structure Now size models 7/8 die x 2 0 1j dia x2 $895 11 dia x 3 5 ENGINE SLEEVE BEARING PULLER Pull tight sleeves bearings easily damage new 99s 17MM rea bearing Both SLEEVE- $795for TRANSMITTER CASE An inexpensive molded case protect eapenslve transmitter two stick single transmittersBrown1w grain aluminum trim ano locking clasp $1695 Qatar WC Products GP 3713 Pompano Drive Pensacola FL 325111 Phone 9011 11768639 INCLUbE 9100 PER ITEM FOR UPS photography learned little about backgrounds focus still long way go lighting composition Bob Beckman 8248 Holly Grove Ct Manass VA 22110 RC Pylon Racing/Hager Continued page 58 checked again Well some changes some props noted testing props noticed some seemed have airflow behind others So checked pitch see What found out didnt seem right lower-pitch prop turning same rpm higher-pitch prop equal diameter shouldnt have airflow other So started thinking could measure differ ence saying its wood system used easy make simple come round cardboard tube roll ZLIN Z50-L K Brand New hot new per former gives everything demand model Strong lightweight balsa ply construc tion easy buildl Fuel tank hardware included 60 90 two stroke 90 120 four stroke engines BASIC KIT S 1199569Z/3 wing span 844 sq wing area 80% ASSEMBLED 53250075 88 lbs WE GIVE YOU THE GREATEST VALUE fl33gORDER TOLL FREE 8007820022 CI3AI*5 SERVICE & INFORMATION 702-7320022 3132 So Highland Drive Las Vegas Nevada 89109 Send $150 catalog Refunded first purchase April1985 155 Dupont Mylar just right 10-in diameter cut three feet long end slot cut hold protractor using Ping-Pong ball lightweight league size hole drilled thread Hot-Stuffed ball suspended protractor thread hung down center tube trouble getting motor center tube made wooden mount attached workbench slid tube up prop front tube really set some tests because given rpm could test flow prop Boy Did find out lot props same diame ter same pitch same motor rpm close airflow checked angle Ping-Pong ball reached found much 150 difference ball locations wasnt interested scientific explanation inter ested finding prop equal prop knew got low times raced Well knew strong engine little math using existing rpm vs known engine rpm constant calcu lated such prop stand turned certain rpm could expect certain rpm engine Later field tests proved constant could used thing method taught no two props same no matter much effort put modi fying will change much important thing knew could identify before left workshop Also knew practice props go-fast props important items Also using method make change will see result right Im about discuss Take two 9-7 Rev-Up props Both have same rpm balanced might have much 100 difference aifflow checking pitch may find prop lower blade other prop True up check airflow will likely increase Balance prop retest might find airflow along increase rpm So now prop worst now best rpm airflow After doingthis number props will begin see definite pattern taking place will soon able identify props identical rpm pitch can referenced back prop makes go fast have spoken Q-500-type props seems place start also questions come guess what Im trying say have sound base start such prop know makes go fast changes pitch diameter rpm will have meaning have found guy gets rpm usually wins tach race just sounds good running himself after everyone else has finished race piece equipment has used prop have used both Q-500 Formula result going also-ran being ones beat Sure flying experience helpsbut isnt acquired weekend next Thats fast results prop work noted goes back being able take prop out box knowing closest thing before Did ever hear guys say good prop hadand sure enough because just didnt go fast next time out Well have heard times just look flight box chuckle myself list information can obtained using device endless depends deeply want get closing will list few things have investigated 1 Airflow ver sus pitch 2 Prop design differences 3 Diameter versus airflow pitch 4 Prop trueness 5 Thickness versus rpm tip flutter 6 Expected rpm 7 Engine going over hill 8 Tip washout 9 Practice versus racing props 10 nothing else better understanding props aster MANUFACTURERS OF SPORT PATTERNSTINGER II PEPPERMINT PATTIE 60 TAN PEPPERMINT PATTIE 40SPORT/SCALE PEPPERMINT PATTIE 15 HIPERBIPE Custom Built Models 2036 N Theme Ave Fresno CA 93704 Order Phone 209 233-1050ask Bill LOVE fly HATE build Contact me have solution probleml Kits Custom Built Order Sanded Ready Cover AndrewsGoldbergGreat PlanesEtc IF1yWhatIDui1d 1935 KINNER SPORTWING 1/4 size span Plans consist 4 sheets include construction booklet fin decals Plans 0 Postage WOODY FRANTZ 9126 E 67th Ct Tulsa OK 74133 918 250-0033 156 Model Aviation B 7I~i2t4iy Needless say thats what mean ur modelers compar apples apples considering Large S le Warbird Dozens f phone calls disappointed purchasers mpetitive bargai kits have prompted us produce very ple priceless arbirds Buyers Guide trying event disappoi ment modelers complete info acket Buyers ide fine Warbirds Kits send $2 per model Specify P- latest release A6M5 Zero us find out ca become Lifetime Charter Member lusive Byron Originals 1 ir Force Byron Origina Box 279 B N ORIG Ida Grove wa 51445 Ph364-3165 DIVISION OP BAR/RICH SALES CO #2 FAIRWAY HANNIBAL MO 63401 314 221-8803 really great stuff eh See next month Bill Hager 706 Glen Haven Dr Conroe TX 77385 RC Helicopters/Jolly Continued page 59 stable hover Once forward flight decrease drag makes maneuvers just much smoother After flying Jet Ranger sur prised Robert Gorham chose combination successful bid team slot upcoming World Champs smaller size lighter weight 50-powered Helicopter gives apparent edge larger machines diminutive machine can accelerate decelerate quicker well perform flight maneuvers tighter box National competition GMP Jet Ranger has already finished second Intermediate flown John Gorham first US team trials flown Robert Gorham Well have wait see Robert stacks up against Ewald Heim just happens fly own design Jet Ranger called Star Ranger What get money order GMP Jet Ranger get hand-laid laminated fiberglass fuselage polyester resin fuselage very detailed comes complete die-cut A-in plywood formers full-size draw ing clear windows fuselage weighs 22 ounces formers installed As previously men tioned fuselage looks very Japanese originbut 100% domestic Whether youre looking Scale ship sport ship all-out contest bird Cobra Jet Ranger can nicely fit task understand folks GMP working fuselages Cobra mechanics Well keep posted information becomes available months three-view Its no wonder Bell model 206 Jet Ranger most-produced Radio Control Scale Heli copter moment can think eight different RC Jet Rangers produc tion Jet Ranger has become most-recognized full-size machines can ask non-helicopter people identify commercial helicopter just passed overhead nine times out 10 theyll answer correctly Model 206 Jet Ranger designed compete 1961 US Army light observation helicopter LOH program lost competition Hughes OH-6 prototype Model 206 built competition against OH-6 Fairchild-Hiller OH-5 designated OH-4 Army first flew late 1962 less 13 months after ordered Despite its loss OH-6 LOH contract Model 206 became significant commercial success Bell 1968 US Navy ordered 40 slightlymodified Jet Rangers its basic helicop ter flight instruction program designating TH-57A Sea Rangers Shortly thereafter US Army announced Model 206A won reopened LOH competition OH-58A Kiowa initial order 2200 aircraft placed Model 206 has also built under license Italy Australia variants model 206 singleengined general-purpose light helicop ters landing skids two-bladed semi-rigid main rotor anti-torque tail rotor mounted left side tail boom fuselage made up three sections nose semi-monocoque center tail boom accom modation five cabin original Model 206 entered 1961 LOH competition equipped 250-shp Allison T63 turboshaft engine has grown current 317 shp uprated Allison T63 US Navys TH-57As equipped dual controls electronics package modified suit Navys needs US Armys OH-58s have single controls Continued page 160 SAVE OLD 11MER have parts inventory tor prompt delivery Over 235 items Timers ts s etc Coming Ignition Engine Parts Only Send $200 Current List MICRO MODEL ENGINEERING Kirach Municipal Airport 1301 West Latayette StreetSturgis Michigan 49091 echTor THERMO MOLDEDSTRONGA METAL FRAME-GREAT GIFT FOAMFILLED 951255. TransmItter * Protection Case E $35 lechde Shrppra & KondIcg n USCAodd 6%Sond check or 0 * BERGERON ENTERPRISES 443 ROBERTAFULLERTON CA 92632 A Matched Performance System TOP PERFORMANCE K&B ENGINES 16 Airplave 4 Marive K&R FUELS668 GLOW PLUGS 7 BlevOs4 cvvices Matched Finish System BEST APPEARANCE 666 FIBERGLASS CLOTFI 668 Mcrn-Ballvvvs FILLER 668 SUPER FOXY RESIN 668 SUPER POXY THINNER K&R SUPER POXY PRIMER K&R SUPER POXY PAINT 666 MIXING CUPS April 1985157
Edition: Model Aviation - 1985/04
Page Numbers: 58, 155, 156, 157
Radio Control Pylon Racing Bill Hager HAPPY New Year indications 1985 should great year Pylon Racing Quarter Midget making come back Formula just strong ever Q-500 have received several inquiries FAI have read lot different articles props have received some very inter esting information fellow flier does very well Racing wishes remain anonymous what writes interesting am going pass So goes Just read article about what props have used relative geographic location January 1984 issue dis cussion will use prop names sizes reference points am firm believer what works wont work another planes identical respects After about two three years asking wont prop same just took otT being very envious passed time Ijust sat down started thinking problem solve good Quality Control Manager should initial thoughts 1 Flying experience counts cant fly plane belongs start working problem 2 Building expertise needed well-built planes go faster 3 prop very important assuming have competitive engine Well spent winter building right spent lot time practicing icing buddi don about d learn gn once things started falling place done anything except balance make sure props same pitch both sides first years end result about 20-second drop time 500 15-second drop time Formula I knew could go faster still problem does prop much better So following winter spent making props good pitch gauge collected different props everyone went other way saw coming main center concentration props Zinger Rev-Up sizes related Q-500 Formula Iand also props knew did what So big thing test Well winter wasnt about go out cold test props Besides what would tell couldnt find out indoors So what done Finally found electric motor old Singer sewing machine used because proper shaft size put prop drive K&B 40 used lightdimmer switch control rpm Boy did sucker turn prop first time put Rev-Up 9-7 turned instant clean basement nothing left walls After airflow problem correc ted via open-door policy knew what rpm prop would turn respect its actual pitch using Prather pitch gauge Note pitch gauge means something person uses pitch gauges equal So set out plot pitch vs rpm Well didnt tell much least next step true balance propsif remember right about 20 done rpm Continued page 155 Dallas RC Clubs Race Against Cancer raised $13000 contributions American Cancer SocIety Weii bet fiying site neighbors compiained about noise after performance iike ieft Danny Baii caller Wayne Cox during race Danny sponsored himacif $100 Race Against Cancer foiks R L R Drew Jerena Dailas RC Ciub President John Gui Vai Marchesoni Matt Smith Western band played runway dance held Race Against Cancer Photos Randolph 58 Model Aviation RC Giant Scale/Beckman Continued page 57 glue especially consider stresses will see rough landing point seems obvious want get some glue working us joint Some people try using big globs glue fill cor ners two pieces meet adds weight strength since glue designed hold two pieces something else together itself very strong Dont make mistake think ing what just said doesnt apply epoxy does What needed crease total area glued joint Thats gussets come Take another look definition gusset talks about bracket plate. implies least two types gussets applica tion bracket corresponds piece material fitted glued angles between two structural members plate flat piece material glued surface both members spanning joint pictures can see gussets plate type Bracket fill-in type gussets have uses cases prefer plates mind fill-ins have two strikes against First trying get maximum glued area should thick structural members case t balsa would indicated Second joint requires least two sometimes three four carefully-fitted pieces Thats lot time-consuming work plates other hand piece per joint needed little fitting required Plates can quite thin since gluing area surface edge course material used must have good tensile strength favorite 42-in plywood has strength needed application can easily cut pair scissors took about two minutes prepare gussets Sparrowhawk used combination square draw bunch one-inch squares 6 x 12-in sheet plywood drew diagonals through squares easy job 450 head combination square cut Out triangular gussets scissors few rectangular pieces needed done just easily Youll note gussets outside framework gives maximum strength least amount work Since formers needed final fuselage shape simply included thickness gussets cutting formers fit framework sometimes case framework itself outer surface fuselage might want have gussets show ing case might want use bracket fill-in type gusset Plates can used inside framework have some real dis * TPLANS * AR Baby 7j Especially Turn-around thi 850 sq 120 9 cycle powered Ron Chidgey design smooth solid performer Rib templates computer plotted Plans construction hints $1190 TIGER TAIL 4 Ron Chidgeys latest best series little larger lighter slower retains honest flight characteristics its predecess ors Plans construction hints WELLER 3 BLADE FIBERGLASS PROP Proven ih Nats Interna tional competition 7319 $2000 IVANS MAGIC GADGET protractor device used Ivan Krletensen accurately measu-e aileron elevator arfd rucder throw Takes guess work Out trimming Out airplane quality tool complete instructions log book carrying case SEE YOUR DEALER OR OREItK DIRECT advantages first completely internal gusset arrangement can reinforce plane struc ture corner example could use internal plate gussets strengthen sides framework would have use either external plates brackets reinforce top bottom points crossmembers line vertical members final point Ive often seen gussets shown sections circles dont see advantage same size gusset difference gluing area significant compared work involved second Sparrowhawk picture month shows final rigid gusseted framework fleshed out lightweight formers stringers also shows that time making some progress responding advertisers mention read about Model Aviation WING TUBE & SOCKETS Aluminum alloy tubing plugin wings Included pair special slipfit phenolic sockets build wing structure Now size models 7/8 die x 2 0 1j dia x2 $895 11 dia x 3 5 ENGINE SLEEVE BEARING PULLER Pull tight sleeves bearings easily damage new 99s 17MM rea bearing Both SLEEVE- $795for TRANSMITTER CASE An inexpensive molded case protect eapenslve transmitter two stick single transmittersBrown1w grain aluminum trim ano locking clasp $1695 Qatar WC Products GP 3713 Pompano Drive Pensacola FL 325111 Phone 9011 11768639 INCLUbE 9100 PER ITEM FOR UPS photography learned little about backgrounds focus still long way go lighting composition Bob Beckman 8248 Holly Grove Ct Manass VA 22110 RC Pylon Racing/Hager Continued page 58 checked again Well some changes some props noted testing props noticed some seemed have airflow behind others So checked pitch see What found out didnt seem right lower-pitch prop turning same rpm higher-pitch prop equal diameter shouldnt have airflow other So started thinking could measure differ ence saying its wood system used easy make simple come round cardboard tube roll ZLIN Z50-L K Brand New hot new per former gives everything demand model Strong lightweight balsa ply construc tion easy buildl Fuel tank hardware included 60 90 two stroke 90 120 four stroke engines BASIC KIT S 1199569Z/3 wing span 844 sq wing area 80% ASSEMBLED 53250075 88 lbs WE GIVE YOU THE GREATEST VALUE fl33gORDER TOLL FREE 8007820022 CI3AI*5 SERVICE & INFORMATION 702-7320022 3132 So Highland Drive Las Vegas Nevada 89109 Send $150 catalog Refunded first purchase April1985 155 Dupont Mylar just right 10-in diameter cut three feet long end slot cut hold protractor using Ping-Pong ball lightweight league size hole drilled thread Hot-Stuffed ball suspended protractor thread hung down center tube trouble getting motor center tube made wooden mount attached workbench slid tube up prop front tube really set some tests because given rpm could test flow prop Boy Did find out lot props same diame ter same pitch same motor rpm close airflow checked angle Ping-Pong ball reached found much 150 difference ball locations wasnt interested scientific explanation inter ested finding prop equal prop knew got low times raced Well knew strong engine little math using existing rpm vs known engine rpm constant calcu lated such prop stand turned certain rpm could expect certain rpm engine Later field tests proved constant could used thing method taught no two props same no matter much effort put modi fying will change much important thing knew could identify before left workshop Also knew practice props go-fast props important items Also using method make change will see result right Im about discuss Take two 9-7 Rev-Up props Both have same rpm balanced might have much 100 difference aifflow checking pitch may find prop lower blade other prop True up check airflow will likely increase Balance prop retest might find airflow along increase rpm So now prop worst now best rpm airflow After doingthis number props will begin see definite pattern taking place will soon able identify props identical rpm pitch can referenced back prop makes go fast have spoken Q-500-type props seems place start also questions come guess what Im trying say have sound base start such prop know makes go fast changes pitch diameter rpm will have meaning have found guy gets rpm usually wins tach race just sounds good running himself after everyone else has finished race piece equipment has used prop have used both Q-500 Formula result going also-ran being ones beat Sure flying experience helpsbut isnt acquired weekend next Thats fast results prop work noted goes back being able take prop out box knowing closest thing before Did ever hear guys say good prop hadand sure enough because just didnt go fast next time out Well have heard times just look flight box chuckle myself list information can obtained using device endless depends deeply want get closing will list few things have investigated 1 Airflow ver sus pitch 2 Prop design differences 3 Diameter versus airflow pitch 4 Prop trueness 5 Thickness versus rpm tip flutter 6 Expected rpm 7 Engine going over hill 8 Tip washout 9 Practice versus racing props 10 nothing else better understanding props aster MANUFACTURERS OF SPORT PATTERNSTINGER II PEPPERMINT PATTIE 60 TAN PEPPERMINT PATTIE 40SPORT/SCALE PEPPERMINT PATTIE 15 HIPERBIPE Custom Built Models 2036 N Theme Ave Fresno CA 93704 Order Phone 209 233-1050ask Bill LOVE fly HATE build Contact me have solution probleml Kits Custom Built Order Sanded Ready Cover AndrewsGoldbergGreat PlanesEtc IF1yWhatIDui1d 1935 KINNER SPORTWING 1/4 size span Plans consist 4 sheets include construction booklet fin decals Plans 0 Postage WOODY FRANTZ 9126 E 67th Ct Tulsa OK 74133 918 250-0033 156 Model Aviation B 7I~i2t4iy Needless say thats what mean ur modelers compar apples apples considering Large S le Warbird Dozens f phone calls disappointed purchasers mpetitive bargai kits have prompted us produce very ple priceless arbirds Buyers Guide trying event disappoi ment modelers complete info acket Buyers ide fine Warbirds Kits send $2 per model Specify P- latest release A6M5 Zero us find out ca become Lifetime Charter Member lusive Byron Originals 1 ir Force Byron Origina Box 279 B N ORIG Ida Grove wa 51445 Ph364-3165 DIVISION OP BAR/RICH SALES CO #2 FAIRWAY HANNIBAL MO 63401 314 221-8803 really great stuff eh See next month Bill Hager 706 Glen Haven Dr Conroe TX 77385 RC Helicopters/Jolly Continued page 59 stable hover Once forward flight decrease drag makes maneuvers just much smoother After flying Jet Ranger sur prised Robert Gorham chose combination successful bid team slot upcoming World Champs smaller size lighter weight 50-powered Helicopter gives apparent edge larger machines diminutive machine can accelerate decelerate quicker well perform flight maneuvers tighter box National competition GMP Jet Ranger has already finished second Intermediate flown John Gorham first US team trials flown Robert Gorham Well have wait see Robert stacks up against Ewald Heim just happens fly own design Jet Ranger called Star Ranger What get money order GMP Jet Ranger get hand-laid laminated fiberglass fuselage polyester resin fuselage very detailed comes complete die-cut A-in plywood formers full-size draw ing clear windows fuselage weighs 22 ounces formers installed As previously men tioned fuselage looks very Japanese originbut 100% domestic Whether youre looking Scale ship sport ship all-out contest bird Cobra Jet Ranger can nicely fit task understand folks GMP working fuselages Cobra mechanics Well keep posted information becomes available months three-view Its no wonder Bell model 206 Jet Ranger most-produced Radio Control Scale Heli copter moment can think eight different RC Jet Rangers produc tion Jet Ranger has become most-recognized full-size machines can ask non-helicopter people identify commercial helicopter just passed overhead nine times out 10 theyll answer correctly Model 206 Jet Ranger designed compete 1961 US Army light observation helicopter LOH program lost competition Hughes OH-6 prototype Model 206 built competition against OH-6 Fairchild-Hiller OH-5 designated OH-4 Army first flew late 1962 less 13 months after ordered Despite its loss OH-6 LOH contract Model 206 became significant commercial success Bell 1968 US Navy ordered 40 slightlymodified Jet Rangers its basic helicop ter flight instruction program designating TH-57A Sea Rangers Shortly thereafter US Army announced Model 206A won reopened LOH competition OH-58A Kiowa initial order 2200 aircraft placed Model 206 has also built under license Italy Australia variants model 206 singleengined general-purpose light helicop ters landing skids two-bladed semi-rigid main rotor anti-torque tail rotor mounted left side tail boom fuselage made up three sections nose semi-monocoque center tail boom accom modation five cabin original Model 206 entered 1961 LOH competition equipped 250-shp Allison T63 turboshaft engine has grown current 317 shp uprated Allison T63 US Navys TH-57As equipped dual controls electronics package modified suit Navys needs US Armys OH-58s have single controls Continued page 160 SAVE OLD 11MER have parts inventory tor prompt delivery Over 235 items Timers ts s etc Coming Ignition Engine Parts Only Send $200 Current List MICRO MODEL ENGINEERING Kirach Municipal Airport 1301 West Latayette StreetSturgis Michigan 49091 echTor THERMO MOLDEDSTRONGA METAL FRAME-GREAT GIFT FOAMFILLED 951255. TransmItter * Protection Case E $35 lechde Shrppra & KondIcg n USCAodd 6%Sond check or 0 * BERGERON ENTERPRISES 443 ROBERTAFULLERTON CA 92632 A Matched Performance System TOP PERFORMANCE K&B ENGINES 16 Airplave 4 Marive K&R FUELS668 GLOW PLUGS 7 BlevOs4 cvvices Matched Finish System BEST APPEARANCE 666 FIBERGLASS CLOTFI 668 Mcrn-Ballvvvs FILLER 668 SUPER FOXY RESIN 668 SUPER POXY THINNER K&R SUPER POXY PRIMER K&R SUPER POXY PAINT 666 MIXING CUPS April 1985157
Edition: Model Aviation - 1985/04
Page Numbers: 58, 155, 156, 157
Radio Control Pylon Racing Bill Hager HAPPY New Year indications 1985 should great year Pylon Racing Quarter Midget making come back Formula just strong ever Q-500 have received several inquiries FAI have read lot different articles props have received some very inter esting information fellow flier does very well Racing wishes remain anonymous what writes interesting am going pass So goes Just read article about what props have used relative geographic location January 1984 issue dis cussion will use prop names sizes reference points am firm believer what works wont work another planes identical respects After about two three years asking wont prop same just took otT being very envious passed time Ijust sat down started thinking problem solve good Quality Control Manager should initial thoughts 1 Flying experience counts cant fly plane belongs start working problem 2 Building expertise needed well-built planes go faster 3 prop very important assuming have competitive engine Well spent winter building right spent lot time practicing icing buddi don about d learn gn once things started falling place done anything except balance make sure props same pitch both sides first years end result about 20-second drop time 500 15-second drop time Formula I knew could go faster still problem does prop much better So following winter spent making props good pitch gauge collected different props everyone went other way saw coming main center concentration props Zinger Rev-Up sizes related Q-500 Formula Iand also props knew did what So big thing test Well winter wasnt about go out cold test props Besides what would tell couldnt find out indoors So what done Finally found electric motor old Singer sewing machine used because proper shaft size put prop drive K&B 40 used lightdimmer switch control rpm Boy did sucker turn prop first time put Rev-Up 9-7 turned instant clean basement nothing left walls After airflow problem correc ted via open-door policy knew what rpm prop would turn respect its actual pitch using Prather pitch gauge Note pitch gauge means something person uses pitch gauges equal So set out plot pitch vs rpm Well didnt tell much least next step true balance propsif remember right about 20 done rpm Continued page 155 Dallas RC Clubs Race Against Cancer raised $13000 contributions American Cancer SocIety Weii bet fiying site neighbors compiained about noise after performance iike ieft Danny Baii caller Wayne Cox during race Danny sponsored himacif $100 Race Against Cancer foiks R L R Drew Jerena Dailas RC Ciub President John Gui Vai Marchesoni Matt Smith Western band played runway dance held Race Against Cancer Photos Randolph 58 Model Aviation RC Giant Scale/Beckman Continued page 57 glue especially consider stresses will see rough landing point seems obvious want get some glue working us joint Some people try using big globs glue fill cor ners two pieces meet adds weight strength since glue designed hold two pieces something else together itself very strong Dont make mistake think ing what just said doesnt apply epoxy does What needed crease total area glued joint Thats gussets come Take another look definition gusset talks about bracket plate. implies least two types gussets applica tion bracket corresponds piece material fitted glued angles between two structural members plate flat piece material glued surface both members spanning joint pictures can see gussets plate type Bracket fill-in type gussets have uses cases prefer plates mind fill-ins have two strikes against First trying get maximum glued area should thick structural members case t balsa would indicated Second joint requires least two sometimes three four carefully-fitted pieces Thats lot time-consuming work plates other hand piece per joint needed little fitting required Plates can quite thin since gluing area surface edge course material used must have good tensile strength favorite 42-in plywood has strength needed application can easily cut pair scissors took about two minutes prepare gussets Sparrowhawk used combination square draw bunch one-inch squares 6 x 12-in sheet plywood drew diagonals through squares easy job 450 head combination square cut Out triangular gussets scissors few rectangular pieces needed done just easily Youll note gussets outside framework gives maximum strength least amount work Since formers needed final fuselage shape simply included thickness gussets cutting formers fit framework sometimes case framework itself outer surface fuselage might want have gussets show ing case might want use bracket fill-in type gusset Plates can used inside framework have some real dis * TPLANS * AR Baby 7j Especially Turn-around thi 850 sq 120 9 cycle powered Ron Chidgey design smooth solid performer Rib templates computer plotted Plans construction hints $1190 TIGER TAIL 4 Ron Chidgeys latest best series little larger lighter slower retains honest flight characteristics its predecess ors Plans construction hints WELLER 3 BLADE FIBERGLASS PROP Proven ih Nats Interna tional competition 7319 $2000 IVANS MAGIC GADGET protractor device used Ivan Krletensen accurately measu-e aileron elevator arfd rucder throw Takes guess work Out trimming Out airplane quality tool complete instructions log book carrying case SEE YOUR DEALER OR OREItK DIRECT advantages first completely internal gusset arrangement can reinforce plane struc ture corner example could use internal plate gussets strengthen sides framework would have use either external plates brackets reinforce top bottom points crossmembers line vertical members final point Ive often seen gussets shown sections circles dont see advantage same size gusset difference gluing area significant compared work involved second Sparrowhawk picture month shows final rigid gusseted framework fleshed out lightweight formers stringers also shows that time making some progress responding advertisers mention read about Model Aviation WING TUBE & SOCKETS Aluminum alloy tubing plugin wings Included pair special slipfit phenolic sockets build wing structure Now size models 7/8 die x 2 0 1j dia x2 $895 11 dia x 3 5 ENGINE SLEEVE BEARING PULLER Pull tight sleeves bearings easily damage new 99s 17MM rea bearing Both SLEEVE- $795for TRANSMITTER CASE An inexpensive molded case protect eapenslve transmitter two stick single transmittersBrown1w grain aluminum trim ano locking clasp $1695 Qatar WC Products GP 3713 Pompano Drive Pensacola FL 325111 Phone 9011 11768639 INCLUbE 9100 PER ITEM FOR UPS photography learned little about backgrounds focus still long way go lighting composition Bob Beckman 8248 Holly Grove Ct Manass VA 22110 RC Pylon Racing/Hager Continued page 58 checked again Well some changes some props noted testing props noticed some seemed have airflow behind others So checked pitch see What found out didnt seem right lower-pitch prop turning same rpm higher-pitch prop equal diameter shouldnt have airflow other So started thinking could measure differ ence saying its wood system used easy make simple come round cardboard tube roll ZLIN Z50-L K Brand New hot new per former gives everything demand model Strong lightweight balsa ply construc tion easy buildl Fuel tank hardware included 60 90 two stroke 90 120 four stroke engines BASIC KIT S 1199569Z/3 wing span 844 sq wing area 80% ASSEMBLED 53250075 88 lbs WE GIVE YOU THE GREATEST VALUE fl33gORDER TOLL FREE 8007820022 CI3AI*5 SERVICE & INFORMATION 702-7320022 3132 So Highland Drive Las Vegas Nevada 89109 Send $150 catalog Refunded first purchase April1985 155 Dupont Mylar just right 10-in diameter cut three feet long end slot cut hold protractor using Ping-Pong ball lightweight league size hole drilled thread Hot-Stuffed ball suspended protractor thread hung down center tube trouble getting motor center tube made wooden mount attached workbench slid tube up prop front tube really set some tests because given rpm could test flow prop Boy Did find out lot props same diame ter same pitch same motor rpm close airflow checked angle Ping-Pong ball reached found much 150 difference ball locations wasnt interested scientific explanation inter ested finding prop equal prop knew got low times raced Well knew strong engine little math using existing rpm vs known engine rpm constant calcu lated such prop stand turned certain rpm could expect certain rpm engine Later field tests proved constant could used thing method taught no two props same no matter much effort put modi fying will change much important thing knew could identify before left workshop Also knew practice props go-fast props important items Also using method make change will see result right Im about discuss Take two 9-7 Rev-Up props Both have same rpm balanced might have much 100 difference aifflow checking pitch may find prop lower blade other prop True up check airflow will likely increase Balance prop retest might find airflow along increase rpm So now prop worst now best rpm airflow After doingthis number props will begin see definite pattern taking place will soon able identify props identical rpm pitch can referenced back prop makes go fast have spoken Q-500-type props seems place start also questions come guess what Im trying say have sound base start such prop know makes go fast changes pitch diameter rpm will have meaning have found guy gets rpm usually wins tach race just sounds good running himself after everyone else has finished race piece equipment has used prop have used both Q-500 Formula result going also-ran being ones beat Sure flying experience helpsbut isnt acquired weekend next Thats fast results prop work noted goes back being able take prop out box knowing closest thing before Did ever hear guys say good prop hadand sure enough because just didnt go fast next time out Well have heard times just look flight box chuckle myself list information can obtained using device endless depends deeply want get closing will list few things have investigated 1 Airflow ver sus pitch 2 Prop design differences 3 Diameter versus airflow pitch 4 Prop trueness 5 Thickness versus rpm tip flutter 6 Expected rpm 7 Engine going over hill 8 Tip washout 9 Practice versus racing props 10 nothing else better understanding props aster MANUFACTURERS OF SPORT PATTERNSTINGER II PEPPERMINT PATTIE 60 TAN PEPPERMINT PATTIE 40SPORT/SCALE PEPPERMINT PATTIE 15 HIPERBIPE Custom Built Models 2036 N Theme Ave Fresno CA 93704 Order Phone 209 233-1050ask Bill LOVE fly HATE build Contact me have solution probleml Kits Custom Built Order Sanded Ready Cover AndrewsGoldbergGreat PlanesEtc IF1yWhatIDui1d 1935 KINNER SPORTWING 1/4 size span Plans consist 4 sheets include construction booklet fin decals Plans 0 Postage WOODY FRANTZ 9126 E 67th Ct Tulsa OK 74133 918 250-0033 156 Model Aviation B 7I~i2t4iy Needless say thats what mean ur modelers compar apples apples considering Large S le Warbird Dozens f phone calls disappointed purchasers mpetitive bargai kits have prompted us produce very ple priceless arbirds Buyers Guide trying event disappoi ment modelers complete info acket Buyers ide fine Warbirds Kits send $2 per model Specify P- latest release A6M5 Zero us find out ca become Lifetime Charter Member lusive Byron Originals 1 ir Force Byron Origina Box 279 B N ORIG Ida Grove wa 51445 Ph364-3165 DIVISION OP BAR/RICH SALES CO #2 FAIRWAY HANNIBAL MO 63401 314 221-8803 really great stuff eh See next month Bill Hager 706 Glen Haven Dr Conroe TX 77385 RC Helicopters/Jolly Continued page 59 stable hover Once forward flight decrease drag makes maneuvers just much smoother After flying Jet Ranger sur prised Robert Gorham chose combination successful bid team slot upcoming World Champs smaller size lighter weight 50-powered Helicopter gives apparent edge larger machines diminutive machine can accelerate decelerate quicker well perform flight maneuvers tighter box National competition GMP Jet Ranger has already finished second Intermediate flown John Gorham first US team trials flown Robert Gorham Well have wait see Robert stacks up against Ewald Heim just happens fly own design Jet Ranger called Star Ranger What get money order GMP Jet Ranger get hand-laid laminated fiberglass fuselage polyester resin fuselage very detailed comes complete die-cut A-in plywood formers full-size draw ing clear windows fuselage weighs 22 ounces formers installed As previously men tioned fuselage looks very Japanese originbut 100% domestic Whether youre looking Scale ship sport ship all-out contest bird Cobra Jet Ranger can nicely fit task understand folks GMP working fuselages Cobra mechanics Well keep posted information becomes available months three-view Its no wonder Bell model 206 Jet Ranger most-produced Radio Control Scale Heli copter moment can think eight different RC Jet Rangers produc tion Jet Ranger has become most-recognized full-size machines can ask non-helicopter people identify commercial helicopter just passed overhead nine times out 10 theyll answer correctly Model 206 Jet Ranger designed compete 1961 US Army light observation helicopter LOH program lost competition Hughes OH-6 prototype Model 206 built competition against OH-6 Fairchild-Hiller OH-5 designated OH-4 Army first flew late 1962 less 13 months after ordered Despite its loss OH-6 LOH contract Model 206 became significant commercial success Bell 1968 US Navy ordered 40 slightlymodified Jet Rangers its basic helicop ter flight instruction program designating TH-57A Sea Rangers Shortly thereafter US Army announced Model 206A won reopened LOH competition OH-58A Kiowa initial order 2200 aircraft placed Model 206 has also built under license Italy Australia variants model 206 singleengined general-purpose light helicop ters landing skids two-bladed semi-rigid main rotor anti-torque tail rotor mounted left side tail boom fuselage made up three sections nose semi-monocoque center tail boom accom modation five cabin original Model 206 entered 1961 LOH competition equipped 250-shp Allison T63 turboshaft engine has grown current 317 shp uprated Allison T63 US Navys TH-57As equipped dual controls electronics package modified suit Navys needs US Armys OH-58s have single controls Continued page 160 SAVE OLD 11MER have parts inventory tor prompt delivery Over 235 items Timers ts s etc Coming Ignition Engine Parts Only Send $200 Current List MICRO MODEL ENGINEERING Kirach Municipal Airport 1301 West Latayette StreetSturgis Michigan 49091 echTor THERMO MOLDEDSTRONGA METAL FRAME-GREAT GIFT FOAMFILLED 951255. TransmItter * Protection Case E $35 lechde Shrppra & KondIcg n USCAodd 6%Sond check or 0 * BERGERON ENTERPRISES 443 ROBERTAFULLERTON CA 92632 A Matched Performance System TOP PERFORMANCE K&B ENGINES 16 Airplave 4 Marive K&R FUELS668 GLOW PLUGS 7 BlevOs4 cvvices Matched Finish System BEST APPEARANCE 666 FIBERGLASS CLOTFI 668 Mcrn-Ballvvvs FILLER 668 SUPER FOXY RESIN 668 SUPER POXY THINNER K&R SUPER POXY PRIMER K&R SUPER POXY PAINT 666 MIXING CUPS April 1985157
Edition: Model Aviation - 1985/04
Page Numbers: 58, 155, 156, 157
Radio Control Pylon Racing Bill Hager HAPPY New Year indications 1985 should great year Pylon Racing Quarter Midget making come back Formula just strong ever Q-500 have received several inquiries FAI have read lot different articles props have received some very inter esting information fellow flier does very well Racing wishes remain anonymous what writes interesting am going pass So goes Just read article about what props have used relative geographic location January 1984 issue dis cussion will use prop names sizes reference points am firm believer what works wont work another planes identical respects After about two three years asking wont prop same just took otT being very envious passed time Ijust sat down started thinking problem solve good Quality Control Manager should initial thoughts 1 Flying experience counts cant fly plane belongs start working problem 2 Building expertise needed well-built planes go faster 3 prop very important assuming have competitive engine Well spent winter building right spent lot time practicing icing buddi don about d learn gn once things started falling place done anything except balance make sure props same pitch both sides first years end result about 20-second drop time 500 15-second drop time Formula I knew could go faster still problem does prop much better So following winter spent making props good pitch gauge collected different props everyone went other way saw coming main center concentration props Zinger Rev-Up sizes related Q-500 Formula Iand also props knew did what So big thing test Well winter wasnt about go out cold test props Besides what would tell couldnt find out indoors So what done Finally found electric motor old Singer sewing machine used because proper shaft size put prop drive K&B 40 used lightdimmer switch control rpm Boy did sucker turn prop first time put Rev-Up 9-7 turned instant clean basement nothing left walls After airflow problem correc ted via open-door policy knew what rpm prop would turn respect its actual pitch using Prather pitch gauge Note pitch gauge means something person uses pitch gauges equal So set out plot pitch vs rpm Well didnt tell much least next step true balance propsif remember right about 20 done rpm Continued page 155 Dallas RC Clubs Race Against Cancer raised $13000 contributions American Cancer SocIety Weii bet fiying site neighbors compiained about noise after performance iike ieft Danny Baii caller Wayne Cox during race Danny sponsored himacif $100 Race Against Cancer foiks R L R Drew Jerena Dailas RC Ciub President John Gui Vai Marchesoni Matt Smith Western band played runway dance held Race Against Cancer Photos Randolph 58 Model Aviation RC Giant Scale/Beckman Continued page 57 glue especially consider stresses will see rough landing point seems obvious want get some glue working us joint Some people try using big globs glue fill cor ners two pieces meet adds weight strength since glue designed hold two pieces something else together itself very strong Dont make mistake think ing what just said doesnt apply epoxy does What needed crease total area glued joint Thats gussets come Take another look definition gusset talks about bracket plate. implies least two types gussets applica tion bracket corresponds piece material fitted glued angles between two structural members plate flat piece material glued surface both members spanning joint pictures can see gussets plate type Bracket fill-in type gussets have uses cases prefer plates mind fill-ins have two strikes against First trying get maximum glued area should thick structural members case t balsa would indicated Second joint requires least two sometimes three four carefully-fitted pieces Thats lot time-consuming work plates other hand piece per joint needed little fitting required Plates can quite thin since gluing area surface edge course material used must have good tensile strength favorite 42-in plywood has strength needed application can easily cut pair scissors took about two minutes prepare gussets Sparrowhawk used combination square draw bunch one-inch squares 6 x 12-in sheet plywood drew diagonals through squares easy job 450 head combination square cut Out triangular gussets scissors few rectangular pieces needed done just easily Youll note gussets outside framework gives maximum strength least amount work Since formers needed final fuselage shape simply included thickness gussets cutting formers fit framework sometimes case framework itself outer surface fuselage might want have gussets show ing case might want use bracket fill-in type gusset Plates can used inside framework have some real dis * TPLANS * AR Baby 7j Especially Turn-around thi 850 sq 120 9 cycle powered Ron Chidgey design smooth solid performer Rib templates computer plotted Plans construction hints $1190 TIGER TAIL 4 Ron Chidgeys latest best series little larger lighter slower retains honest flight characteristics its predecess ors Plans construction hints WELLER 3 BLADE FIBERGLASS PROP Proven ih Nats Interna tional competition 7319 $2000 IVANS MAGIC GADGET protractor device used Ivan Krletensen accurately measu-e aileron elevator arfd rucder throw Takes guess work Out trimming Out airplane quality tool complete instructions log book carrying case SEE YOUR DEALER OR OREItK DIRECT advantages first completely internal gusset arrangement can reinforce plane struc ture corner example could use internal plate gussets strengthen sides framework would have use either external plates brackets reinforce top bottom points crossmembers line vertical members final point Ive often seen gussets shown sections circles dont see advantage same size gusset difference gluing area significant compared work involved second Sparrowhawk picture month shows final rigid gusseted framework fleshed out lightweight formers stringers also shows that time making some progress responding advertisers mention read about Model Aviation WING TUBE & SOCKETS Aluminum alloy tubing plugin wings Included pair special slipfit phenolic sockets build wing structure Now size models 7/8 die x 2 0 1j dia x2 $895 11 dia x 3 5 ENGINE SLEEVE BEARING PULLER Pull tight sleeves bearings easily damage new 99s 17MM rea bearing Both SLEEVE- $795for TRANSMITTER CASE An inexpensive molded case protect eapenslve transmitter two stick single transmittersBrown1w grain aluminum trim ano locking clasp $1695 Qatar WC Products GP 3713 Pompano Drive Pensacola FL 325111 Phone 9011 11768639 INCLUbE 9100 PER ITEM FOR UPS photography learned little about backgrounds focus still long way go lighting composition Bob Beckman 8248 Holly Grove Ct Manass VA 22110 RC Pylon Racing/Hager Continued page 58 checked again Well some changes some props noted testing props noticed some seemed have airflow behind others So checked pitch see What found out didnt seem right lower-pitch prop turning same rpm higher-pitch prop equal diameter shouldnt have airflow other So started thinking could measure differ ence saying its wood system used easy make simple come round cardboard tube roll ZLIN Z50-L K Brand New hot new per former gives everything demand model Strong lightweight balsa ply construc tion easy buildl Fuel tank hardware included 60 90 two stroke 90 120 four stroke engines BASIC KIT S 1199569Z/3 wing span 844 sq wing area 80% ASSEMBLED 53250075 88 lbs WE GIVE YOU THE GREATEST VALUE fl33gORDER TOLL FREE 8007820022 CI3AI*5 SERVICE & INFORMATION 702-7320022 3132 So Highland Drive Las Vegas Nevada 89109 Send $150 catalog Refunded first purchase April1985 155 Dupont Mylar just right 10-in diameter cut three feet long end slot cut hold protractor using Ping-Pong ball lightweight league size hole drilled thread Hot-Stuffed ball suspended protractor thread hung down center tube trouble getting motor center tube made wooden mount attached workbench slid tube up prop front tube really set some tests because given rpm could test flow prop Boy Did find out lot props same diame ter same pitch same motor rpm close airflow checked angle Ping-Pong ball reached found much 150 difference ball locations wasnt interested scientific explanation inter ested finding prop equal prop knew got low times raced Well knew strong engine little math using existing rpm vs known engine rpm constant calcu lated such prop stand turned certain rpm could expect certain rpm engine Later field tests proved constant could used thing method taught no two props same no matter much effort put modi fying will change much important thing knew could identify before left workshop Also knew practice props go-fast props important items Also using method make change will see result right Im about discuss Take two 9-7 Rev-Up props Both have same rpm balanced might have much 100 difference aifflow checking pitch may find prop lower blade other prop True up check airflow will likely increase Balance prop retest might find airflow along increase rpm So now prop worst now best rpm airflow After doingthis number props will begin see definite pattern taking place will soon able identify props identical rpm pitch can referenced back prop makes go fast have spoken Q-500-type props seems place start also questions come guess what Im trying say have sound base start such prop know makes go fast changes pitch diameter rpm will have meaning have found guy gets rpm usually wins tach race just sounds good running himself after everyone else has finished race piece equipment has used prop have used both Q-500 Formula result going also-ran being ones beat Sure flying experience helpsbut isnt acquired weekend next Thats fast results prop work noted goes back being able take prop out box knowing closest thing before Did ever hear guys say good prop hadand sure enough because just didnt go fast next time out Well have heard times just look flight box chuckle myself list information can obtained using device endless depends deeply want get closing will list few things have investigated 1 Airflow ver sus pitch 2 Prop design differences 3 Diameter versus airflow pitch 4 Prop trueness 5 Thickness versus rpm tip flutter 6 Expected rpm 7 Engine going over hill 8 Tip washout 9 Practice versus racing props 10 nothing else better understanding props aster MANUFACTURERS OF SPORT PATTERNSTINGER II PEPPERMINT PATTIE 60 TAN PEPPERMINT PATTIE 40SPORT/SCALE PEPPERMINT PATTIE 15 HIPERBIPE Custom Built Models 2036 N Theme Ave Fresno CA 93704 Order Phone 209 233-1050ask Bill LOVE fly HATE build Contact me have solution probleml Kits Custom Built Order Sanded Ready Cover AndrewsGoldbergGreat PlanesEtc IF1yWhatIDui1d 1935 KINNER SPORTWING 1/4 size span Plans consist 4 sheets include construction booklet fin decals Plans 0 Postage WOODY FRANTZ 9126 E 67th Ct Tulsa OK 74133 918 250-0033 156 Model Aviation B 7I~i2t4iy Needless say thats what mean ur modelers compar apples apples considering Large S le Warbird Dozens f phone calls disappointed purchasers mpetitive bargai kits have prompted us produce very ple priceless arbirds Buyers Guide trying event disappoi ment modelers complete info acket Buyers ide fine Warbirds Kits send $2 per model Specify P- latest release A6M5 Zero us find out ca become Lifetime Charter Member lusive Byron Originals 1 ir Force Byron Origina Box 279 B N ORIG Ida Grove wa 51445 Ph364-3165 DIVISION OP BAR/RICH SALES CO #2 FAIRWAY HANNIBAL MO 63401 314 221-8803 really great stuff eh See next month Bill Hager 706 Glen Haven Dr Conroe TX 77385 RC Helicopters/Jolly Continued page 59 stable hover Once forward flight decrease drag makes maneuvers just much smoother After flying Jet Ranger sur prised Robert Gorham chose combination successful bid team slot upcoming World Champs smaller size lighter weight 50-powered Helicopter gives apparent edge larger machines diminutive machine can accelerate decelerate quicker well perform flight maneuvers tighter box National competition GMP Jet Ranger has already finished second Intermediate flown John Gorham first US team trials flown Robert Gorham Well have wait see Robert stacks up against Ewald Heim just happens fly own design Jet Ranger called Star Ranger What get money order GMP Jet Ranger get hand-laid laminated fiberglass fuselage polyester resin fuselage very detailed comes complete die-cut A-in plywood formers full-size draw ing clear windows fuselage weighs 22 ounces formers installed As previously men tioned fuselage looks very Japanese originbut 100% domestic Whether youre looking Scale ship sport ship all-out contest bird Cobra Jet Ranger can nicely fit task understand folks GMP working fuselages Cobra mechanics Well keep posted information becomes available months three-view Its no wonder Bell model 206 Jet Ranger most-produced Radio Control Scale Heli copter moment can think eight different RC Jet Rangers produc tion Jet Ranger has become most-recognized full-size machines can ask non-helicopter people identify commercial helicopter just passed overhead nine times out 10 theyll answer correctly Model 206 Jet Ranger designed compete 1961 US Army light observation helicopter LOH program lost competition Hughes OH-6 prototype Model 206 built competition against OH-6 Fairchild-Hiller OH-5 designated OH-4 Army first flew late 1962 less 13 months after ordered Despite its loss OH-6 LOH contract Model 206 became significant commercial success Bell 1968 US Navy ordered 40 slightlymodified Jet Rangers its basic helicop ter flight instruction program designating TH-57A Sea Rangers Shortly thereafter US Army announced Model 206A won reopened LOH competition OH-58A Kiowa initial order 2200 aircraft placed Model 206 has also built under license Italy Australia variants model 206 singleengined general-purpose light helicop ters landing skids two-bladed semi-rigid main rotor anti-torque tail rotor mounted left side tail boom fuselage made up three sections nose semi-monocoque center tail boom accom modation five cabin original Model 206 entered 1961 LOH competition equipped 250-shp Allison T63 turboshaft engine has grown current 317 shp uprated Allison T63 US Navys TH-57As equipped dual controls electronics package modified suit Navys needs US Armys OH-58s have single controls Continued page 160 SAVE OLD 11MER have parts inventory tor prompt delivery Over 235 items Timers ts s etc Coming Ignition Engine Parts Only Send $200 Current List MICRO MODEL ENGINEERING Kirach Municipal Airport 1301 West Latayette StreetSturgis Michigan 49091 echTor THERMO MOLDEDSTRONGA METAL FRAME-GREAT GIFT FOAMFILLED 951255. TransmItter * Protection Case E $35 lechde Shrppra & KondIcg n USCAodd 6%Sond check or 0 * BERGERON ENTERPRISES 443 ROBERTAFULLERTON CA 92632 A Matched Performance System TOP PERFORMANCE K&B ENGINES 16 Airplave 4 Marive K&R FUELS668 GLOW PLUGS 7 BlevOs4 cvvices Matched Finish System BEST APPEARANCE 666 FIBERGLASS CLOTFI 668 Mcrn-Ballvvvs FILLER 668 SUPER FOXY RESIN 668 SUPER POXY THINNER K&R SUPER POXY PRIMER K&R SUPER POXY PAINT 666 MIXING CUPS April 1985157