THIS month seem have little something everybody starters incom patability gasoline fuel tanks Although test conducted during past summer using gasoline-filled Sullivan tank experienced no leakage such case Frank Vidmar Orlando FL Frank writes experience Byron Pitts Special gasoline follows After installing Quadra engine Pitts used Sullivan tank installed inside fuselage After several flights much dismay discovered gasoline leak inside fuselage dissolved portion fuselage Foam gasoline acts like Alka Seltzer water disassembly discovered silicone tubing rubber cork tank swelled up causing tank leak occured also fuselage full gasoline fumes bomb hands also discussion fellow club member during last month related similar experience case swelling rubber stopper sufficient split tank open neck So moral story use gasoline old-style Sullivan tanks Sullivan accomplishes switch Buna N rubber stoppers can again use both conventional fuel gasoline Meanwhile pointed out Franks letter remedy situation repaired Pitts installed Kraft tank under cowl external fuselage Since time have no problems Kraft tank completely compat ible gasoline because does have rubber stopper comes supplied neoprene tubing Byron quite correct warning customers next have tip fliers much smaller models mostly FF Scale variety Earl Van Gorder author Flyin Things Fledglings column Flying Models maga zine comes solution problems experi enced several modelers have operated Shark CO-2 motors Several months back related incidents chargers blowing apart hot weather apparently due insufficient en gagement threads time CO-2 cylinder pierced Earls letter states came uponthis sameproblemlastMay aresultofan article Max-Fax newsletter Wash ington DC Maxecuters also edit club news letter get swap Stew Myers Washington club related problem errant Shark charger letting go just missing head fellow modeler did further experiments found charger let go timeon day tried temperature 900 F Stew did some calculations determined pres sure CO-2 temperature 1250 psi. too much Shark charger course Telco Brown new Modella chargers have surrounding chanical housing dependent threads hold pressure good news also found Shark engine can charged Telco charger tried make sure Telco charger does work fine Shark re wrote info FM column included above fact about Telco charger thought might want same since appar ently aware Thank Earl Indeed despite fact Stew almost neighbors quite because Stew lives wrong side river aware Telco charger could used Shark motor Hope IIILIA COMES FIRST Weve got informa tion gasoline plastic tanks CO-2 charger safety fires plastic Most important Careless use some new two-part poly urethane paints can cause death serious nj u ryfast John Preston readers saw discussed Earls FM column put out have repeated story happen regular subscriber Flying Models can skip next story too Much has said about hazards some paints use hobby previous column stated generally spray outdoors dont have inhale noxious fumes Well appears approach would safe among modelers like have custom auto body-shop finish elect use latest discovery model finishes known DuPont Imron June issue Flyng Models Bob Hoeckele devoted editorial hazard using Imron paint proper equipment edi torial brought attention John Jones Houston TX felt hazard should have distribution thank Flying Models permitting us quote editorial DuPonts literature describes Imron wet look lasts does twopart curable polyurethane coating available about 1000 colors cures amazingly fast glves high-gloss finish just two coats also absolutely impervious thing including pure nitromethane Sounds like just stuflfor model airplane boat doesnt does hire someone spray dont breath doesnt mean old rag wrapped around face either means air-fed respirator other protective gear careful profes sional finisher uses see Imron contains something called poly-isocianates Some other two-part polyure thanes use Toluene diisocianate TDI Imron uses aliphatic light stable poly-isocianates What important understand much what can instance Dangerous Properties Industrial Mater ials published Van Nostrand Reinhold Co 3 high toxic-hazard rating defined possibly causing death permanent injury after very short exposure small quanti ties Toluene diisocianate rates 3 under irritant inhalation alergen says capable producing severe dermatitis bronchial spasm also never leaves system after absorbed cumulative also sensitizes means f years pass since have breathed small wh could cause have attack Being modeler means use things cans jars time have warnings labels After awhile dont read anymore tend ignore new products get Imron carries proper warnings fact says industrial use professional trained personnel sale use general public modeler wants something hell get though Imron costs about $40 per gallon reasons writing include reports lot modelers seem have gotten some researching also contacted some mask manufacturers cluding Binks did recommend lower-priced masks use twopart polyurethanes thing should used air-fed respirator seems can smell isocianate already about 200% past tolerable levels What saying want readers around buy FM enjoy hobby used properly Imron could very well shorten time DuPont spokesman told us Imron used trained professional painting personnel appropriate equipment DuPont thought appro priate finishing models certainly would try sell youBob Hoeckele Note Emphasis added editor RBM So have though may want have best finish block club avoid using Imron unless also happen professional painter know handle air-fed respirator wind up months column have suggestion John Hunton fellow club member John employed firm builds RPVs incident describes happened work could just easily have happened own workshop home An incident occurred work yesterday might find place files warning others using propane torch heat remove englne backplate tapered shaft Continued page 125 4PPW PER Pm. ESCO 50 CEVAC UP TECH EREFS 250 L HOFFELT 1IP fUAIN4IIFUuT X 99774eSAN DIEGOCAUFb U 9210s TELEPHONE 754-453-1984 Piasecki/HRP-1 Flying Banana/i 11813 Piasecki/HRP-2 Flying Banana/i 11829 Piaaecki/UH-25C HUP-3 Retriever/i 47600 Sikoraky/CH-i 9E H RS-3 Chickaaew/1 42432 Sikoraky/HO3S-1 /124352 Sikorsky/UH-340 HUS-1 Seahorae/1 50227 Sikorsky/UH-34D HUS-1 Seahorse/i 54895 Sikoraky/VS-44 Flying Boat/Unknown Vought/OS2U-3 Kingfisher/Unknown Vultee/SNV-1 Valiant/Unknown Safety Preston Continued page 69 Being engrossed what doing sat torch down bench inadvertantly aimed toward MonoKote-covered vertical stabilizer RPV tail caught fire burned area quickly spread diameter two three inches reaction blow flame out quickly before things got out hand flame went out quickly ring molten plastic around hole flew back face plastic gave its heat skin droplet solidified stuck painful experience Luckily no plastic got eyes Suggestion Keep small fire extinguishers readily available no blow Out buming plastic time read column flying season northerly parts US will over Now have time hands some sit down drop us line John Preston 7012 Eltira Court Falls Church VA 22042 SAFE FLYING IS NO ACCIDENT Letters Editor Continued page 4 Powered FF Folders may realize Stan Stoys article Powered Folders Shadow Things Come MA June 1980 has engendered least four letters her three too long throw away Folders dont know what frustration until dig particular can worms last several years have designing refining building smashing rehashing endless cycle Im still confused bewil dered. hopefully now higher leveL best advice anyone contemplating folders Grab cool drink sit down wait urge pass rrhosis liver will less painful long run Im afraid Stans article makes appear too simple should get few laughs experience just dont think translating Stans HLG approach Power version will worktoo dif ferences Q trigger relying does air speed would become booby-trap ship going off-pattern slowing down wings wouldnt open until hit ground End airplane style wing hinge used HLG suitable heavier faster Power ships enough muscle overcome adverse air pressure enough mechanical ad vantage handle inertial shock opening keep wings ripping off Actually impossible get enough power hinges alone Auxiliary boosters needed fuselage get wing N I--------I Ps Balsa Fuzz Freow/out Adjustments Sma $10 00 Large shown $20 00 P ease add $1 00 postage P Kits ature Replicas EE BEE shown $600 please adc $100 postage Catalog 75 See Dealer Order VGENE DUBOIS P0 BoxAcushnet MA 02743 .DEALER INQUIRIES INVITED moving past hinge dead spot triplefolding feature has lot going isnt much room squeeze third similar section Power foils thicker best can Whitcomb winglet Some vital things about wing design con struction must pressed fit between January 1981 125 AOUOBOOM AMA $ 2900 MONOOOEi FRI 2800 IOUOOOM FAI.e 2400 NO NONSENSE BALSA STRIPPERS ZONA SAWS famous line hobby saws Razor #200 $190 Sabre #400 $165 #1$345 Replacement blades available dealer F A I Model Supply PO Box 3957 Torrence CA 90510 USA Bill Gieskieng first kids tne block have FAI folder witness 77 photos top pylon back position gliding lower pic shows forward position necessary rearward center-of-gravity
Edition: Model Aviation - 1981/01
Page Numbers: 69, 125
THIS month seem have little something everybody starters incom patability gasoline fuel tanks Although test conducted during past summer using gasoline-filled Sullivan tank experienced no leakage such case Frank Vidmar Orlando FL Frank writes experience Byron Pitts Special gasoline follows After installing Quadra engine Pitts used Sullivan tank installed inside fuselage After several flights much dismay discovered gasoline leak inside fuselage dissolved portion fuselage Foam gasoline acts like Alka Seltzer water disassembly discovered silicone tubing rubber cork tank swelled up causing tank leak occured also fuselage full gasoline fumes bomb hands also discussion fellow club member during last month related similar experience case swelling rubber stopper sufficient split tank open neck So moral story use gasoline old-style Sullivan tanks Sullivan accomplishes switch Buna N rubber stoppers can again use both conventional fuel gasoline Meanwhile pointed out Franks letter remedy situation repaired Pitts installed Kraft tank under cowl external fuselage Since time have no problems Kraft tank completely compat ible gasoline because does have rubber stopper comes supplied neoprene tubing Byron quite correct warning customers next have tip fliers much smaller models mostly FF Scale variety Earl Van Gorder author Flyin Things Fledglings column Flying Models maga zine comes solution problems experi enced several modelers have operated Shark CO-2 motors Several months back related incidents chargers blowing apart hot weather apparently due insufficient en gagement threads time CO-2 cylinder pierced Earls letter states came uponthis sameproblemlastMay aresultofan article Max-Fax newsletter Wash ington DC Maxecuters also edit club news letter get swap Stew Myers Washington club related problem errant Shark charger letting go just missing head fellow modeler did further experiments found charger let go timeon day tried temperature 900 F Stew did some calculations determined pres sure CO-2 temperature 1250 psi. too much Shark charger course Telco Brown new Modella chargers have surrounding chanical housing dependent threads hold pressure good news also found Shark engine can charged Telco charger tried make sure Telco charger does work fine Shark re wrote info FM column included above fact about Telco charger thought might want same since appar ently aware Thank Earl Indeed despite fact Stew almost neighbors quite because Stew lives wrong side river aware Telco charger could used Shark motor Hope IIILIA COMES FIRST Weve got informa tion gasoline plastic tanks CO-2 charger safety fires plastic Most important Careless use some new two-part poly urethane paints can cause death serious nj u ryfast John Preston readers saw discussed Earls FM column put out have repeated story happen regular subscriber Flying Models can skip next story too Much has said about hazards some paints use hobby previous column stated generally spray outdoors dont have inhale noxious fumes Well appears approach would safe among modelers like have custom auto body-shop finish elect use latest discovery model finishes known DuPont Imron June issue Flyng Models Bob Hoeckele devoted editorial hazard using Imron paint proper equipment edi torial brought attention John Jones Houston TX felt hazard should have distribution thank Flying Models permitting us quote editorial DuPonts literature describes Imron wet look lasts does twopart curable polyurethane coating available about 1000 colors cures amazingly fast glves high-gloss finish just two coats also absolutely impervious thing including pure nitromethane Sounds like just stuflfor model airplane boat doesnt does hire someone spray dont breath doesnt mean old rag wrapped around face either means air-fed respirator other protective gear careful profes sional finisher uses see Imron contains something called poly-isocianates Some other two-part polyure thanes use Toluene diisocianate TDI Imron uses aliphatic light stable poly-isocianates What important understand much what can instance Dangerous Properties Industrial Mater ials published Van Nostrand Reinhold Co 3 high toxic-hazard rating defined possibly causing death permanent injury after very short exposure small quanti ties Toluene diisocianate rates 3 under irritant inhalation alergen says capable producing severe dermatitis bronchial spasm also never leaves system after absorbed cumulative also sensitizes means f years pass since have breathed small wh could cause have attack Being modeler means use things cans jars time have warnings labels After awhile dont read anymore tend ignore new products get Imron carries proper warnings fact says industrial use professional trained personnel sale use general public modeler wants something hell get though Imron costs about $40 per gallon reasons writing include reports lot modelers seem have gotten some researching also contacted some mask manufacturers cluding Binks did recommend lower-priced masks use twopart polyurethanes thing should used air-fed respirator seems can smell isocianate already about 200% past tolerable levels What saying want readers around buy FM enjoy hobby used properly Imron could very well shorten time DuPont spokesman told us Imron used trained professional painting personnel appropriate equipment DuPont thought appro priate finishing models certainly would try sell youBob Hoeckele Note Emphasis added editor RBM So have though may want have best finish block club avoid using Imron unless also happen professional painter know handle air-fed respirator wind up months column have suggestion John Hunton fellow club member John employed firm builds RPVs incident describes happened work could just easily have happened own workshop home An incident occurred work yesterday might find place files warning others using propane torch heat remove englne backplate tapered shaft Continued page 125 4PPW PER Pm. ESCO 50 CEVAC UP TECH EREFS 250 L HOFFELT 1IP fUAIN4IIFUuT X 99774eSAN DIEGOCAUFb U 9210s TELEPHONE 754-453-1984 Piasecki/HRP-1 Flying Banana/i 11813 Piasecki/HRP-2 Flying Banana/i 11829 Piaaecki/UH-25C HUP-3 Retriever/i 47600 Sikoraky/CH-i 9E H RS-3 Chickaaew/1 42432 Sikoraky/HO3S-1 /124352 Sikorsky/UH-340 HUS-1 Seahorae/1 50227 Sikorsky/UH-34D HUS-1 Seahorse/i 54895 Sikoraky/VS-44 Flying Boat/Unknown Vought/OS2U-3 Kingfisher/Unknown Vultee/SNV-1 Valiant/Unknown Safety Preston Continued page 69 Being engrossed what doing sat torch down bench inadvertantly aimed toward MonoKote-covered vertical stabilizer RPV tail caught fire burned area quickly spread diameter two three inches reaction blow flame out quickly before things got out hand flame went out quickly ring molten plastic around hole flew back face plastic gave its heat skin droplet solidified stuck painful experience Luckily no plastic got eyes Suggestion Keep small fire extinguishers readily available no blow Out buming plastic time read column flying season northerly parts US will over Now have time hands some sit down drop us line John Preston 7012 Eltira Court Falls Church VA 22042 SAFE FLYING IS NO ACCIDENT Letters Editor Continued page 4 Powered FF Folders may realize Stan Stoys article Powered Folders Shadow Things Come MA June 1980 has engendered least four letters her three too long throw away Folders dont know what frustration until dig particular can worms last several years have designing refining building smashing rehashing endless cycle Im still confused bewil dered. hopefully now higher leveL best advice anyone contemplating folders Grab cool drink sit down wait urge pass rrhosis liver will less painful long run Im afraid Stans article makes appear too simple should get few laughs experience just dont think translating Stans HLG approach Power version will worktoo dif ferences Q trigger relying does air speed would become booby-trap ship going off-pattern slowing down wings wouldnt open until hit ground End airplane style wing hinge used HLG suitable heavier faster Power ships enough muscle overcome adverse air pressure enough mechanical ad vantage handle inertial shock opening keep wings ripping off Actually impossible get enough power hinges alone Auxiliary boosters needed fuselage get wing N I--------I Ps Balsa Fuzz Freow/out Adjustments Sma $10 00 Large shown $20 00 P ease add $1 00 postage P Kits ature Replicas EE BEE shown $600 please adc $100 postage Catalog 75 See Dealer Order VGENE DUBOIS P0 BoxAcushnet MA 02743 .DEALER INQUIRIES INVITED moving past hinge dead spot triplefolding feature has lot going isnt much room squeeze third similar section Power foils thicker best can Whitcomb winglet Some vital things about wing design con struction must pressed fit between January 1981 125 AOUOBOOM AMA $ 2900 MONOOOEi FRI 2800 IOUOOOM FAI.e 2400 NO NONSENSE BALSA STRIPPERS ZONA SAWS famous line hobby saws Razor #200 $190 Sabre #400 $165 #1$345 Replacement blades available dealer F A I Model Supply PO Box 3957 Torrence CA 90510 USA Bill Gieskieng first kids tne block have FAI folder witness 77 photos top pylon back position gliding lower pic shows forward position necessary rearward center-of-gravity