HELICOPTERS Dave Chesney WELL Im quite ready report Ray Hostetlers Jet Ranger modification month letter prompted some thoughts about Jet Ranger other scale semiscale RC helicopters months column has referred primarily erector-set-style helicopter Machines like Schlueter Heliboy American Commander Revolution 40 Du-Bro Shark choices available helicopter enthusiast fact kit helicopters both erector-set-style scale types far know have never advertised American magazines Pick up copy Japanese RC magazine some time look variety choppers guys fly Wish could read about Any interpreters Out rate American chopper enthusiasts have what seems have very limited variety helicopter types choose Most variety full-scale helicopters past present have modeled have ignored because un usual configurations respect present state modeling art instance helicop ters sporting tandem rotors like Piasecki H21 H25 Bocing-Vertol 107 later designs would likely found club flight line Nor would helicopters contrarotating intermeshing rotors such Kaman H-43 Our modeling technology commonly designates configuration having single main rotor anti-torque tall rotor Now still variety single rotor helicopters could modeled flown novice fliers Most will ignored model helicopter manufacturers simply cause does seem demand scale models familiar average spectator unlike fixed-wing RC scale counterparts unusual designs will left scratch-builders interest scale scale-like helicopter models variety scale helicopter kits perhaps better imaginedand variety growing Kavan Jet Ranger premiere scale helicopter kit Certainly has enjoyed great popularity years remains ex cellent kit Now newest rotor system options other changes Kavan Jet Ranger will probably remain us years come Some its popularity pro bably due popularity full-scale Bell Jet Ranger very possibly Kavans marketing strategy Kavan first present model helicopter people could recognize like asking average guy name light plane Cub right Well ask someone name helicopter likely itll Jet Ranger Well Cub sure covered lot different light aircraft ask RC helicopter flier about Jet Ranger first thought probably Kavaneven though least two other model helicopter manufacturers also kitted Bell Jet Ranger photos show what can done Kavan Jet Ranger scale modeling thing Another popular scale helicopter offered Schlueter form Bell Huey Cobra Cobra rather large todays standards chose too because after looked like real thing would fly still around attest designs popularity like Kavan Jet Ranger other manufacturers chose Cobra model well Last year Toledo American R/C Helicopters Inc introduced S Cobra prototype later design Bells earlier Huey Cobra American may soon release 5 Cobra us interested scale military choppers Hughes 500 also popular civil/mili tary helicopter probably few Kalt Hughes 500s around recently Ameri can R/C produced semi-scale Hughes 500 fuselage Revolution 40 other manufacturers have produced fuselage kits Hughes suitable use Kavan Jet Ranger mechanics Still others such T&J Manufacturing offer Hughes 500 fuse fit Heliboy some modification Revolution Commander Now ability wrap scale fuselage such Hughes 500 around existing helicopter seems ideal way gain new machine much work money about wrap-arounds later Hughes 500 sleek executive type full fuselage Hughes 300 n00p 102 April 1980 25 PHI Bell Jet Ranger helicopters familiar sight LA stopped lunch let George Croker take its picture Georges son Curtis r Dave Chesney standing holding chick Taken during lull 1978 Nationals action Hiller background Beautiful Aerospatiale AS 350 ramp Lake Charles LA field Photo Dave Chesney Dave Darrs Kavan Jet Ranger 17 WHAMS snow Photo Chesney Steve Mintz built Kavan Jet Ranger model decorated like big PHI other picture Frank Landry photo ZIF]IhMU EASY 90 NEW HIGH-WING SPORT 90 1/5 Scale 80 Wingspan Flying Weight 101a lbs Fast Building no die-cut parts 15 hrs Inc custom Alum landing Gear$12995 AEROBATIC AIRPLANESprior bending sharply like wing leading BY ROBT C MORRISONIedges Water gave marginally successful results 19 SUPERB ORAWINGSThen day someone suggested use S3 95 P usammon soak balsa Anyone has aoa POS 111111. ~.=used ammonia knows gives fantastic cA OGSRGPLA-1ECHresults never knew However $ 004SO MC k52 .w Leb gh Valley PlC Newsletter edited Tom B Ihe mer short article bending balsa wood went follows bend balsa wood soak ammonia water aqua-ammonia best 15 longer 45 minutes What happens within balsa wood structure orderly assembly arrangement microscopic elongated hollow cellulose tubes held together natural adhesive called lignin temporarily d storted ammonia solution applied balsa wood bent new shape solution water ammonia evapo rates lignin returns its original strength So now know ammonia works About time next column comes out will getting ready fly again after winters hibernation So column will feature suggestions get airplane engine/radio/pilot combination started right foot GET ORGANIZED Hee S set 01 4 stardy tiles holds over 4 years yoa taaolte 5 11 magazInes 4 MAG FILES $495 send $495 pIns $100 postage handling DON INDUSTRIES PO Box 388-K DOVER NH 03820 displacement rating engine intentional some load factor ranges overlap since know hot 35 can swing prop sick 40 After load factor has selected calculations load factors several combinations prop diameter pitch should made determine closest match After initial selection props slight higher lower load factors should tried see satisfies requirements air plane/engine/pilot combination example speed desired prop higher load factor should tried Conversely better low speed thrust will generally obtained using prop lower load factor Unfortunately load factor chart wont tell whether would have better luck manufacturers prop anothers However easy determine everything no would expert Give chart try next time beginner asks what prop put first airplane might think about way go get better vertical performance latest airplane too long time used water soak balsa sheet Ron Van Putte 12 Connie Drive Shalimar FL 32579 RC Helicopters/Chesney Continued page 25 utility variety semi-scale Hughes 300 available Du-Bro number years can fashioned very respectable stand-off scale model Look back few months ago July 1979 MA photo Grady Howards Hughes 300 example what can done Du-Bros Shark Hughes part executive military types full fuselages seem popular guess because chances really doll up fuselage paint schemes recent executive helicopters modeled Bell 222 very sleek business aircraft retractable tricycle landing gear rather usual landing skids Schlueter first offered 222 scale fuselage Heliboy recently Bell 222 fuse lage offered Kavan Jet Ranger mechanics Central Hobby Supply 35 Woodberry Little Rock AR 72212 Centrals Bell 222 may also modified accept Heliboy Revolution Commander Graupner mechanics leaflet photos fiberglass kit looked great wish photo present So far looks like Bell helicopter would have likely full scale helicopter represented model helicopter flying field continue trend Graupner intro duced Bell 212 47G models few years ago Graupner 47G 25 size machine never seemed make over Graupner Bell 212s did Im sure Graupner kits still available 212 fliers Ive talked still find desirable model Graupoer 212 seems very smooth scale-like flying ma chine Other fuselage kits Bell helicopters will modeled instance Bell 212 214 205 slated future releases Central Hobby Supply Bell 204 UH lB IROQUOIS helicopter kit Hirobo available through Consumers Hobby Corp rounds out Bell Helicopter family available RC fliers What about representation other fullscale American helicopter manufacturers have single rotor designs Well excep tion Enstrom Im sure few years ago Du-Bro presented 40 size TnStar Enstrom fuselage re cently Hirobo offers Enstrom Shark 40 size far know model helicopter manufacturers have ignored other full scale american helicopter designs So Sikorsky fans will have scratch-build few other models full scale birds available about Kavans Alouette II 40 size engines Hirobos Aero spatiale Gazelle 60s Schlueters Bolkow B0105 four blade head other helicopters available kit form models European helicopters quite well known American skywatchers beautiful ships very pretty helicopter European design Aerospatiale AS350 have opportunity walk around photo course full scale machine fuselage kit will soon available fit Heliboy mechanics So variety scale helicopter kits fuselage kits availablenow about some 102 Model Aviation 1/5 Scale Size 80 Wingspan 1126 Wing Area Price $12995 CHIPSHIP k Fast Super Aerobatic Ohio TWO EASYt Truly Aerobatic Twin 40 Model High Quality Throughout Price $8995 Diesel Conversion Scale Power Quiet Smooth Economical Send 25 & Stamped Addressed Envelope Dealer Inquiry Invited Diesel Development Inc Dads ox 141 Miltord CT 06460 RC helicopter scale contests expect see several new scale fuselage kits Toledo Show year know Ive probably missed some already available dont feel left outsend photos See Toledo Dave Chesney Route 9 Box 621A Greensboro NC 27409 RC Soaring/Pruss Continued page 26 see Millers article December 1977 MA Wing construction D-tube uses leading edge sheeting both top bottom wing leading edge main spar Ken also passes ideasopinions obser vations has gathered quest Level V goal return work Ken feels three considerations first day little wind key importance second weak lift quite acceptable since will usually weak sink third strong lift strong sink combined moderate winds has undoing goal retum attempts faster climb rates strong thermals negated necessity penetrate strong sink areas Ken also noted since Astro-Jeff Jerry Mrliks fine design paved way crosscountry work Midwest its numerous Level V goal return achievements plus two wins out four SOARs annual Great Race design better L/D would make looking up bit easier didnt shorten time Great Race wins remarkable 212 mile non-stop run Pat Flynn see November 1979 MA flight Pats airbome battery pack gave out Greater Detroit Soaring Hiking Society felt could have gone way challenge still Merlyns design Ken after climb rate equal Astro-Jefls betterL/D bottom line Merlyn has 301 LID 20 mph compares Astro-Jeff L/D 201 same speed Ken goes say due difficulties taking exact mea surements above figures arent 100 percent accurate verify soundness Kens design further information contact Ken Bates 738 N Harris Saline MI 48176 1SF LEVEL V AWARDS 1 John Baxter 2 Steve Work 3 Fred Weaver 4 Neil NoISe 5 Marvin Quail 6 John Newman 7 Don Harris 8 Chris Adams 9 Tom Christian 10 Howard Sears 11 Dwight Holley 12 Ken Bates 13 Paul Wedeking California New Mexico California California California California Ohio California California California Connecticut Michigan New Jersey 1975 1975 1976 1977 1978 1978 1978 1978 1979 1979 1979 1979 1979 Status January 1980 Great Race VSOAR announcedGreat Race V will run year July 19 20 Rules will basically same last year 1 Any AMA sanctioned club may enter mem bers wish least member LSF Level III above sailplanes care however onefrequency will assigned club 2 No relaunching course relaunches desired back starting point 3 SOAR will Inexpensive key word ACES new hoe R/C kits called Silver Series line offers s unique combination value sods wide range versatility found todays R/C market until now cutting out biggest costs Labor furnish kit sod furnish labor allows us give topquality product inexpensive price comparable ro $800 radios some its features SERVO REVERSAL SWITCHES-Wth ost tsp switch thc serco tracel doectron four primary chaanels oun reversed * INOEPENOENT THROW AOJtfST--Ort ohoanela atoovot netoo treori coo coo tolled indepetadently * FIFTH CHANNEL AOJUST--Serao poalsion whee hr retract swrtch rirhar Up Down positron rndrpendenslv ad1assable TRIM LOCATION VARIABLESThe location trims tsar rha builders discretroo p 00 coo hove standard trim cromed srim osa combination thr two * TRIM AUTHORITY PROGRAMMA5ILITYBp rlvanging plog-re fiord resistore amount servo evcvrsioe terms moved programmahle * DUAL RATE -Switches adjustment pars furnished proorde DUAL RATE op three channels EXPONENTIAL RATE OPEION--Tlas plog-iss opsino providra eon-linear narso travel re MIssion snob movrmrer up three channels $1795 * ELECTRONIC MIXER OPEIONWrIb pIne-in modulr two functions can together either utd-dieeosionally ue bidheosiunally $1195 PROGRAMMABLE PUSH BUtTON OPTION-In-fSeht adjustable pra-programmed control surface munemees may uhlalned pain ing bnlrun 08951 THE SILVER SEVEN $28495 Full ni cd system kit receiver four servos cheek pose Ace dealer write call f complete Cdetails 11r erWS S cowplete catalog $100 ladrl $50 foe 1st Class Mail retarni Box 511E 119W 19th Hlgginsvllle Mo 64037 816 5847121 two classics Flyline ITS HERE 11/2 Scale SEE YOUR LOCAL HOBBY DEALER send 25 catalog 34 span 020 power channel nc ors1595 free flight OUAKER FLASH stngle w Vower i9 WIngspan $2495 4 FLYLINE MODELS INC 2850 0055 AOENuE II Farman Moustique PAISFAX VtI5OtNtA santo 755j 573 2038 April 1980 103 ed READY NOW
Edition: Model Aviation - 1980/04
Page Numbers: 25, 102, 103
HELICOPTERS Dave Chesney WELL Im quite ready report Ray Hostetlers Jet Ranger modification month letter prompted some thoughts about Jet Ranger other scale semiscale RC helicopters months column has referred primarily erector-set-style helicopter Machines like Schlueter Heliboy American Commander Revolution 40 Du-Bro Shark choices available helicopter enthusiast fact kit helicopters both erector-set-style scale types far know have never advertised American magazines Pick up copy Japanese RC magazine some time look variety choppers guys fly Wish could read about Any interpreters Out rate American chopper enthusiasts have what seems have very limited variety helicopter types choose Most variety full-scale helicopters past present have modeled have ignored because un usual configurations respect present state modeling art instance helicop ters sporting tandem rotors like Piasecki H21 H25 Bocing-Vertol 107 later designs would likely found club flight line Nor would helicopters contrarotating intermeshing rotors such Kaman H-43 Our modeling technology commonly designates configuration having single main rotor anti-torque tall rotor Now still variety single rotor helicopters could modeled flown novice fliers Most will ignored model helicopter manufacturers simply cause does seem demand scale models familiar average spectator unlike fixed-wing RC scale counterparts unusual designs will left scratch-builders interest scale scale-like helicopter models variety scale helicopter kits perhaps better imaginedand variety growing Kavan Jet Ranger premiere scale helicopter kit Certainly has enjoyed great popularity years remains ex cellent kit Now newest rotor system options other changes Kavan Jet Ranger will probably remain us years come Some its popularity pro bably due popularity full-scale Bell Jet Ranger very possibly Kavans marketing strategy Kavan first present model helicopter people could recognize like asking average guy name light plane Cub right Well ask someone name helicopter likely itll Jet Ranger Well Cub sure covered lot different light aircraft ask RC helicopter flier about Jet Ranger first thought probably Kavaneven though least two other model helicopter manufacturers also kitted Bell Jet Ranger photos show what can done Kavan Jet Ranger scale modeling thing Another popular scale helicopter offered Schlueter form Bell Huey Cobra Cobra rather large todays standards chose too because after looked like real thing would fly still around attest designs popularity like Kavan Jet Ranger other manufacturers chose Cobra model well Last year Toledo American R/C Helicopters Inc introduced S Cobra prototype later design Bells earlier Huey Cobra American may soon release 5 Cobra us interested scale military choppers Hughes 500 also popular civil/mili tary helicopter probably few Kalt Hughes 500s around recently Ameri can R/C produced semi-scale Hughes 500 fuselage Revolution 40 other manufacturers have produced fuselage kits Hughes suitable use Kavan Jet Ranger mechanics Still others such T&J Manufacturing offer Hughes 500 fuse fit Heliboy some modification Revolution Commander Now ability wrap scale fuselage such Hughes 500 around existing helicopter seems ideal way gain new machine much work money about wrap-arounds later Hughes 500 sleek executive type full fuselage Hughes 300 n00p 102 April 1980 25 PHI Bell Jet Ranger helicopters familiar sight LA stopped lunch let George Croker take its picture Georges son Curtis r Dave Chesney standing holding chick Taken during lull 1978 Nationals action Hiller background Beautiful Aerospatiale AS 350 ramp Lake Charles LA field Photo Dave Chesney Dave Darrs Kavan Jet Ranger 17 WHAMS snow Photo Chesney Steve Mintz built Kavan Jet Ranger model decorated like big PHI other picture Frank Landry photo ZIF]IhMU EASY 90 NEW HIGH-WING SPORT 90 1/5 Scale 80 Wingspan Flying Weight 101a lbs Fast Building no die-cut parts 15 hrs Inc custom Alum landing Gear$12995 AEROBATIC AIRPLANESprior bending sharply like wing leading BY ROBT C MORRISONIedges Water gave marginally successful results 19 SUPERB ORAWINGSThen day someone suggested use S3 95 P usammon soak balsa Anyone has aoa POS 111111. ~.=used ammonia knows gives fantastic cA OGSRGPLA-1ECHresults never knew However $ 004SO MC k52 .w Leb gh Valley PlC Newsletter edited Tom B Ihe mer short article bending balsa wood went follows bend balsa wood soak ammonia water aqua-ammonia best 15 longer 45 minutes What happens within balsa wood structure orderly assembly arrangement microscopic elongated hollow cellulose tubes held together natural adhesive called lignin temporarily d storted ammonia solution applied balsa wood bent new shape solution water ammonia evapo rates lignin returns its original strength So now know ammonia works About time next column comes out will getting ready fly again after winters hibernation So column will feature suggestions get airplane engine/radio/pilot combination started right foot GET ORGANIZED Hee S set 01 4 stardy tiles holds over 4 years yoa taaolte 5 11 magazInes 4 MAG FILES $495 send $495 pIns $100 postage handling DON INDUSTRIES PO Box 388-K DOVER NH 03820 displacement rating engine intentional some load factor ranges overlap since know hot 35 can swing prop sick 40 After load factor has selected calculations load factors several combinations prop diameter pitch should made determine closest match After initial selection props slight higher lower load factors should tried see satisfies requirements air plane/engine/pilot combination example speed desired prop higher load factor should tried Conversely better low speed thrust will generally obtained using prop lower load factor Unfortunately load factor chart wont tell whether would have better luck manufacturers prop anothers However easy determine everything no would expert Give chart try next time beginner asks what prop put first airplane might think about way go get better vertical performance latest airplane too long time used water soak balsa sheet Ron Van Putte 12 Connie Drive Shalimar FL 32579 RC Helicopters/Chesney Continued page 25 utility variety semi-scale Hughes 300 available Du-Bro number years can fashioned very respectable stand-off scale model Look back few months ago July 1979 MA photo Grady Howards Hughes 300 example what can done Du-Bros Shark Hughes part executive military types full fuselages seem popular guess because chances really doll up fuselage paint schemes recent executive helicopters modeled Bell 222 very sleek business aircraft retractable tricycle landing gear rather usual landing skids Schlueter first offered 222 scale fuselage Heliboy recently Bell 222 fuse lage offered Kavan Jet Ranger mechanics Central Hobby Supply 35 Woodberry Little Rock AR 72212 Centrals Bell 222 may also modified accept Heliboy Revolution Commander Graupner mechanics leaflet photos fiberglass kit looked great wish photo present So far looks like Bell helicopter would have likely full scale helicopter represented model helicopter flying field continue trend Graupner intro duced Bell 212 47G models few years ago Graupner 47G 25 size machine never seemed make over Graupner Bell 212s did Im sure Graupner kits still available 212 fliers Ive talked still find desirable model Graupoer 212 seems very smooth scale-like flying ma chine Other fuselage kits Bell helicopters will modeled instance Bell 212 214 205 slated future releases Central Hobby Supply Bell 204 UH lB IROQUOIS helicopter kit Hirobo available through Consumers Hobby Corp rounds out Bell Helicopter family available RC fliers What about representation other fullscale American helicopter manufacturers have single rotor designs Well excep tion Enstrom Im sure few years ago Du-Bro presented 40 size TnStar Enstrom fuselage re cently Hirobo offers Enstrom Shark 40 size far know model helicopter manufacturers have ignored other full scale american helicopter designs So Sikorsky fans will have scratch-build few other models full scale birds available about Kavans Alouette II 40 size engines Hirobos Aero spatiale Gazelle 60s Schlueters Bolkow B0105 four blade head other helicopters available kit form models European helicopters quite well known American skywatchers beautiful ships very pretty helicopter European design Aerospatiale AS350 have opportunity walk around photo course full scale machine fuselage kit will soon available fit Heliboy mechanics So variety scale helicopter kits fuselage kits availablenow about some 102 Model Aviation 1/5 Scale Size 80 Wingspan 1126 Wing Area Price $12995 CHIPSHIP k Fast Super Aerobatic Ohio TWO EASYt Truly Aerobatic Twin 40 Model High Quality Throughout Price $8995 Diesel Conversion Scale Power Quiet Smooth Economical Send 25 & Stamped Addressed Envelope Dealer Inquiry Invited Diesel Development Inc Dads ox 141 Miltord CT 06460 RC helicopter scale contests expect see several new scale fuselage kits Toledo Show year know Ive probably missed some already available dont feel left outsend photos See Toledo Dave Chesney Route 9 Box 621A Greensboro NC 27409 RC Soaring/Pruss Continued page 26 see Millers article December 1977 MA Wing construction D-tube uses leading edge sheeting both top bottom wing leading edge main spar Ken also passes ideasopinions obser vations has gathered quest Level V goal return work Ken feels three considerations first day little wind key importance second weak lift quite acceptable since will usually weak sink third strong lift strong sink combined moderate winds has undoing goal retum attempts faster climb rates strong thermals negated necessity penetrate strong sink areas Ken also noted since Astro-Jeff Jerry Mrliks fine design paved way crosscountry work Midwest its numerous Level V goal return achievements plus two wins out four SOARs annual Great Race design better L/D would make looking up bit easier didnt shorten time Great Race wins remarkable 212 mile non-stop run Pat Flynn see November 1979 MA flight Pats airbome battery pack gave out Greater Detroit Soaring Hiking Society felt could have gone way challenge still Merlyns design Ken after climb rate equal Astro-Jefls betterL/D bottom line Merlyn has 301 LID 20 mph compares Astro-Jeff L/D 201 same speed Ken goes say due difficulties taking exact mea surements above figures arent 100 percent accurate verify soundness Kens design further information contact Ken Bates 738 N Harris Saline MI 48176 1SF LEVEL V AWARDS 1 John Baxter 2 Steve Work 3 Fred Weaver 4 Neil NoISe 5 Marvin Quail 6 John Newman 7 Don Harris 8 Chris Adams 9 Tom Christian 10 Howard Sears 11 Dwight Holley 12 Ken Bates 13 Paul Wedeking California New Mexico California California California California Ohio California California California Connecticut Michigan New Jersey 1975 1975 1976 1977 1978 1978 1978 1978 1979 1979 1979 1979 1979 Status January 1980 Great Race VSOAR announcedGreat Race V will run year July 19 20 Rules will basically same last year 1 Any AMA sanctioned club may enter mem bers wish least member LSF Level III above sailplanes care however onefrequency will assigned club 2 No relaunching course relaunches desired back starting point 3 SOAR will Inexpensive key word ACES new hoe R/C kits called Silver Series line offers s unique combination value sods wide range versatility found todays R/C market until now cutting out biggest costs Labor furnish kit sod furnish labor allows us give topquality product inexpensive price comparable ro $800 radios some its features SERVO REVERSAL SWITCHES-Wth ost tsp switch thc serco tracel doectron four primary chaanels oun reversed * INOEPENOENT THROW AOJtfST--Ort ohoanela atoovot netoo treori coo coo tolled indepetadently * FIFTH CHANNEL AOJUST--Serao poalsion whee hr retract swrtch rirhar Up Down positron rndrpendenslv ad1assable TRIM LOCATION VARIABLESThe location trims tsar rha builders discretroo p 00 coo hove standard trim cromed srim osa combination thr two * TRIM AUTHORITY PROGRAMMA5ILITYBp rlvanging plog-re fiord resistore amount servo evcvrsioe terms moved programmahle * DUAL RATE -Switches adjustment pars furnished proorde DUAL RATE op three channels EXPONENTIAL RATE OPEION--Tlas plog-iss opsino providra eon-linear narso travel re MIssion snob movrmrer up three channels $1795 * ELECTRONIC MIXER OPEIONWrIb pIne-in modulr two functions can together either utd-dieeosionally ue bidheosiunally $1195 PROGRAMMABLE PUSH BUtTON OPTION-In-fSeht adjustable pra-programmed control surface munemees may uhlalned pain ing bnlrun 08951 THE SILVER SEVEN $28495 Full ni cd system kit receiver four servos cheek pose Ace dealer write call f complete Cdetails 11r erWS S cowplete catalog $100 ladrl $50 foe 1st Class Mail retarni Box 511E 119W 19th Hlgginsvllle Mo 64037 816 5847121 two classics Flyline ITS HERE 11/2 Scale SEE YOUR LOCAL HOBBY DEALER send 25 catalog 34 span 020 power channel nc ors1595 free flight OUAKER FLASH stngle w Vower i9 WIngspan $2495 4 FLYLINE MODELS INC 2850 0055 AOENuE II Farman Moustique PAISFAX VtI5OtNtA santo 755j 573 2038 April 1980 103 ed READY NOW
Edition: Model Aviation - 1980/04
Page Numbers: 25, 102, 103
HELICOPTERS Dave Chesney WELL Im quite ready report Ray Hostetlers Jet Ranger modification month letter prompted some thoughts about Jet Ranger other scale semiscale RC helicopters months column has referred primarily erector-set-style helicopter Machines like Schlueter Heliboy American Commander Revolution 40 Du-Bro Shark choices available helicopter enthusiast fact kit helicopters both erector-set-style scale types far know have never advertised American magazines Pick up copy Japanese RC magazine some time look variety choppers guys fly Wish could read about Any interpreters Out rate American chopper enthusiasts have what seems have very limited variety helicopter types choose Most variety full-scale helicopters past present have modeled have ignored because un usual configurations respect present state modeling art instance helicop ters sporting tandem rotors like Piasecki H21 H25 Bocing-Vertol 107 later designs would likely found club flight line Nor would helicopters contrarotating intermeshing rotors such Kaman H-43 Our modeling technology commonly designates configuration having single main rotor anti-torque tall rotor Now still variety single rotor helicopters could modeled flown novice fliers Most will ignored model helicopter manufacturers simply cause does seem demand scale models familiar average spectator unlike fixed-wing RC scale counterparts unusual designs will left scratch-builders interest scale scale-like helicopter models variety scale helicopter kits perhaps better imaginedand variety growing Kavan Jet Ranger premiere scale helicopter kit Certainly has enjoyed great popularity years remains ex cellent kit Now newest rotor system options other changes Kavan Jet Ranger will probably remain us years come Some its popularity pro bably due popularity full-scale Bell Jet Ranger very possibly Kavans marketing strategy Kavan first present model helicopter people could recognize like asking average guy name light plane Cub right Well ask someone name helicopter likely itll Jet Ranger Well Cub sure covered lot different light aircraft ask RC helicopter flier about Jet Ranger first thought probably Kavaneven though least two other model helicopter manufacturers also kitted Bell Jet Ranger photos show what can done Kavan Jet Ranger scale modeling thing Another popular scale helicopter offered Schlueter form Bell Huey Cobra Cobra rather large todays standards chose too because after looked like real thing would fly still around attest designs popularity like Kavan Jet Ranger other manufacturers chose Cobra model well Last year Toledo American R/C Helicopters Inc introduced S Cobra prototype later design Bells earlier Huey Cobra American may soon release 5 Cobra us interested scale military choppers Hughes 500 also popular civil/mili tary helicopter probably few Kalt Hughes 500s around recently Ameri can R/C produced semi-scale Hughes 500 fuselage Revolution 40 other manufacturers have produced fuselage kits Hughes suitable use Kavan Jet Ranger mechanics Still others such T&J Manufacturing offer Hughes 500 fuse fit Heliboy some modification Revolution Commander Now ability wrap scale fuselage such Hughes 500 around existing helicopter seems ideal way gain new machine much work money about wrap-arounds later Hughes 500 sleek executive type full fuselage Hughes 300 n00p 102 April 1980 25 PHI Bell Jet Ranger helicopters familiar sight LA stopped lunch let George Croker take its picture Georges son Curtis r Dave Chesney standing holding chick Taken during lull 1978 Nationals action Hiller background Beautiful Aerospatiale AS 350 ramp Lake Charles LA field Photo Dave Chesney Dave Darrs Kavan Jet Ranger 17 WHAMS snow Photo Chesney Steve Mintz built Kavan Jet Ranger model decorated like big PHI other picture Frank Landry photo ZIF]IhMU EASY 90 NEW HIGH-WING SPORT 90 1/5 Scale 80 Wingspan Flying Weight 101a lbs Fast Building no die-cut parts 15 hrs Inc custom Alum landing Gear$12995 AEROBATIC AIRPLANESprior bending sharply like wing leading BY ROBT C MORRISONIedges Water gave marginally successful results 19 SUPERB ORAWINGSThen day someone suggested use S3 95 P usammon soak balsa Anyone has aoa POS 111111. ~.=used ammonia knows gives fantastic cA OGSRGPLA-1ECHresults never knew However $ 004SO MC k52 .w Leb gh Valley PlC Newsletter edited Tom B Ihe mer short article bending balsa wood went follows bend balsa wood soak ammonia water aqua-ammonia best 15 longer 45 minutes What happens within balsa wood structure orderly assembly arrangement microscopic elongated hollow cellulose tubes held together natural adhesive called lignin temporarily d storted ammonia solution applied balsa wood bent new shape solution water ammonia evapo rates lignin returns its original strength So now know ammonia works About time next column comes out will getting ready fly again after winters hibernation So column will feature suggestions get airplane engine/radio/pilot combination started right foot GET ORGANIZED Hee S set 01 4 stardy tiles holds over 4 years yoa taaolte 5 11 magazInes 4 MAG FILES $495 send $495 pIns $100 postage handling DON INDUSTRIES PO Box 388-K DOVER NH 03820 displacement rating engine intentional some load factor ranges overlap since know hot 35 can swing prop sick 40 After load factor has selected calculations load factors several combinations prop diameter pitch should made determine closest match After initial selection props slight higher lower load factors should tried see satisfies requirements air plane/engine/pilot combination example speed desired prop higher load factor should tried Conversely better low speed thrust will generally obtained using prop lower load factor Unfortunately load factor chart wont tell whether would have better luck manufacturers prop anothers However easy determine everything no would expert Give chart try next time beginner asks what prop put first airplane might think about way go get better vertical performance latest airplane too long time used water soak balsa sheet Ron Van Putte 12 Connie Drive Shalimar FL 32579 RC Helicopters/Chesney Continued page 25 utility variety semi-scale Hughes 300 available Du-Bro number years can fashioned very respectable stand-off scale model Look back few months ago July 1979 MA photo Grady Howards Hughes 300 example what can done Du-Bros Shark Hughes part executive military types full fuselages seem popular guess because chances really doll up fuselage paint schemes recent executive helicopters modeled Bell 222 very sleek business aircraft retractable tricycle landing gear rather usual landing skids Schlueter first offered 222 scale fuselage Heliboy recently Bell 222 fuse lage offered Kavan Jet Ranger mechanics Central Hobby Supply 35 Woodberry Little Rock AR 72212 Centrals Bell 222 may also modified accept Heliboy Revolution Commander Graupner mechanics leaflet photos fiberglass kit looked great wish photo present So far looks like Bell helicopter would have likely full scale helicopter represented model helicopter flying field continue trend Graupner intro duced Bell 212 47G models few years ago Graupner 47G 25 size machine never seemed make over Graupner Bell 212s did Im sure Graupner kits still available 212 fliers Ive talked still find desirable model Graupoer 212 seems very smooth scale-like flying ma chine Other fuselage kits Bell helicopters will modeled instance Bell 212 214 205 slated future releases Central Hobby Supply Bell 204 UH lB IROQUOIS helicopter kit Hirobo available through Consumers Hobby Corp rounds out Bell Helicopter family available RC fliers What about representation other fullscale American helicopter manufacturers have single rotor designs Well excep tion Enstrom Im sure few years ago Du-Bro presented 40 size TnStar Enstrom fuselage re cently Hirobo offers Enstrom Shark 40 size far know model helicopter manufacturers have ignored other full scale american helicopter designs So Sikorsky fans will have scratch-build few other models full scale birds available about Kavans Alouette II 40 size engines Hirobos Aero spatiale Gazelle 60s Schlueters Bolkow B0105 four blade head other helicopters available kit form models European helicopters quite well known American skywatchers beautiful ships very pretty helicopter European design Aerospatiale AS350 have opportunity walk around photo course full scale machine fuselage kit will soon available fit Heliboy mechanics So variety scale helicopter kits fuselage kits availablenow about some 102 Model Aviation 1/5 Scale Size 80 Wingspan 1126 Wing Area Price $12995 CHIPSHIP k Fast Super Aerobatic Ohio TWO EASYt Truly Aerobatic Twin 40 Model High Quality Throughout Price $8995 Diesel Conversion Scale Power Quiet Smooth Economical Send 25 & Stamped Addressed Envelope Dealer Inquiry Invited Diesel Development Inc Dads ox 141 Miltord CT 06460 RC helicopter scale contests expect see several new scale fuselage kits Toledo Show year know Ive probably missed some already available dont feel left outsend photos See Toledo Dave Chesney Route 9 Box 621A Greensboro NC 27409 RC Soaring/Pruss Continued page 26 see Millers article December 1977 MA Wing construction D-tube uses leading edge sheeting both top bottom wing leading edge main spar Ken also passes ideasopinions obser vations has gathered quest Level V goal return work Ken feels three considerations first day little wind key importance second weak lift quite acceptable since will usually weak sink third strong lift strong sink combined moderate winds has undoing goal retum attempts faster climb rates strong thermals negated necessity penetrate strong sink areas Ken also noted since Astro-Jeff Jerry Mrliks fine design paved way crosscountry work Midwest its numerous Level V goal return achievements plus two wins out four SOARs annual Great Race design better L/D would make looking up bit easier didnt shorten time Great Race wins remarkable 212 mile non-stop run Pat Flynn see November 1979 MA flight Pats airbome battery pack gave out Greater Detroit Soaring Hiking Society felt could have gone way challenge still Merlyns design Ken after climb rate equal Astro-Jefls betterL/D bottom line Merlyn has 301 LID 20 mph compares Astro-Jeff L/D 201 same speed Ken goes say due difficulties taking exact mea surements above figures arent 100 percent accurate verify soundness Kens design further information contact Ken Bates 738 N Harris Saline MI 48176 1SF LEVEL V AWARDS 1 John Baxter 2 Steve Work 3 Fred Weaver 4 Neil NoISe 5 Marvin Quail 6 John Newman 7 Don Harris 8 Chris Adams 9 Tom Christian 10 Howard Sears 11 Dwight Holley 12 Ken Bates 13 Paul Wedeking California New Mexico California California California California Ohio California California California Connecticut Michigan New Jersey 1975 1975 1976 1977 1978 1978 1978 1978 1979 1979 1979 1979 1979 Status January 1980 Great Race VSOAR announcedGreat Race V will run year July 19 20 Rules will basically same last year 1 Any AMA sanctioned club may enter mem bers wish least member LSF Level III above sailplanes care however onefrequency will assigned club 2 No relaunching course relaunches desired back starting point 3 SOAR will Inexpensive key word ACES new hoe R/C kits called Silver Series line offers s unique combination value sods wide range versatility found todays R/C market until now cutting out biggest costs Labor furnish kit sod furnish labor allows us give topquality product inexpensive price comparable ro $800 radios some its features SERVO REVERSAL SWITCHES-Wth ost tsp switch thc serco tracel doectron four primary chaanels oun reversed * INOEPENOENT THROW AOJtfST--Ort ohoanela atoovot netoo treori coo coo tolled indepetadently * FIFTH CHANNEL AOJUST--Serao poalsion whee hr retract swrtch rirhar Up Down positron rndrpendenslv ad1assable TRIM LOCATION VARIABLESThe location trims tsar rha builders discretroo p 00 coo hove standard trim cromed srim osa combination thr two * TRIM AUTHORITY PROGRAMMA5ILITYBp 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AOENuE II Farman Moustique PAISFAX VtI5OtNtA santo 755j 573 2038 April 1980 103 ed READY NOW