___John Preston___________________________ Safety Comes First Big models/little models have kinetic energy flight can pose danger people property Sum mary hobby health hazards BIG MODELS April 1987 issue Model Aviation column outlined two plans submitted AMA VP suggested way models weighing current maximum 55 lb see Official AMA Safety Code General paragraph 5 might safely flown nutshell plans either Remove 55-lb weight limit entirely allow models weight flown pro vided meet certain safety criteria 2 Keep current 55-lb weight limit establish spe cial Experimental category would have weight limit would again require mod els category meet certain safety criteria asked comments readers merits two plans Response overwhelming received enough letters convince Plan No remove 55-lb weight limit entirely favored Respondents cited number reasons did favor Plan No Generally felt weight limit heavy models would built flown would conform safety criteria favored Plan No 2 stated mod elers desiring build heavy model Ex perimental category should have bear extra insurance cost themselves impose such burden majority AMA membership have no desire build such large models seems fair may possible now essentially self-insured organi zation As AMA President Don Lowe pointed Out segment Big Models column AMA News May 1987 issue bottom line must fly safely whether fly big ones little ones current self-insurance program total assets AMA line Before leaving subject model weight limits Id like pass some comments letter subject Bill Kincheloe Magalia CA Bill favored Plan Continued page 16 14 Model Aviation CANT SPEAJ Fo czuv 541 WHArS ThE 6I D8AL ABOUT MOIEL WEtdMT column provided S address lieu 9 corner reeardlug safely aipacis 9 model evleilen acSIvIUes Content 9 SI. column however SI. opIulon 9th auth audi. uS necessarily represent official position 95k Academy 9 Model Aeronauties / 10 Bill Kinchelos sent Interesting chart Theres Information column including what meant lethal threshold Read heedi tLI Lets enjoy outdoors ort ~' Little World Comfort Hot Burning Summer Days Convenient Size Portable Shade Thats Guick Set up Change Instantly Give Protection Front Weathert Size 72 n 120 60 sq ft Add units double triple etc size PortaShade available Add 05 Units can used trailer awnings patio covers etc PortaShade convenient size has no center pole useable space can straddle picnic table model airplane small vehicle canopy strong heat retlecting waterproot material white top side unique tear proof corner tittings no grommets stands almost 7 tall strong 1 aluminum poles can stand work play under comtort wind resistant ed 40 MPH PortaShade very taut easy install beach picnic mountains anywhere want protection trom elements Set up very quick person can about 5 minutes can adjusted easily tilt against sun can set up vertically us windbreak Master CardVisaMoney OrdersChecks Dealer Inquiries Invited 4M Co Dept M 814 N Shawnee Dewey OK 74029 P hone 918-534-2244 Sportsman Model/PFR4-60 Economy Model/EPFR4-60 $3995 PS $3295 PS No 2but condition enforceable rules can drafted concerning pilots creden tials verification models airworthiness Bill engineer before retired worked designer weapon systems ordnance devices Enclosed letter graphical plot kinetic energy models weighing 15 10 50 lb respect velocity previous discussions model weight limits column Ive talked about kinetic energy should perhaps concern us just model weight However Bill has cluded some additional information plot thought might interest readers quoting letter Ill let Bill explain term Lethal Threshold plot new piece information PO BOX 3076 OAK RIDGE TENNESSEE 37830 Tel 615482-6188 experience may available want argue safety point Lethal Threshold t-lb line Now no longer used military once criterion weapon judged calculated results thousands wounds recorded during Civil War World War World War II Korea being energy dissipated vulnerable area human being has 70% chance killing person enjoy statistics probabilities probability modified multiplying probability missile question hits vulnerable area So can say prob ability lethal accident low because prob ability being hit low Im prepared estimate low acceptable Im sure underwriters wont accept very large number like 10% what see chart equal potential harm seven-to-one velocity increment 50-to-one weight change isnt surprising since seven squared 49 calculations led seven rounded What important whatever lethal threshold accept heavier model has sig nificantly greater potential harm smaller have agree Bill heavier model its potential harm However others have pointed out large models tend fly slower small ones therefore give bystanders time get out way event loss control pilot other words probability being struck large model despite its extra frontal area may less being struck small fast model real reason elected reproduce Bills graph show no matter what sizes Continued page 18 16 Model Aviation liti 74. r ROUSH KITS TaylorCraft Full apan 108 Ante 1670 Clipped 84 Area 1300 Power 75 no 12 cu Baleaft Ply 10l2lba $9996 Super Sport 120 Span 73 Area 960 Power 75 12 cii $9996 Super Kwik FII Span 70 Area 927 Power 75 12 Cu *8996 Coming Soon Two new enervdav scale airplanes 80 AT-6 78 P51 75-120 engines Both $9996 Jr Sticks Span fl Area 1080 Power 75 12 Cu $6995 Direct Sales Only Prices Include Shipping Send $100 Catalog ROUSH MFG 1726 Dywood St IE L Cast. Ohio 44707 21k 4644610 EXTRA 230 SPAN 76 AREA 900 sq POWER 4 stroke 120 ALL BALSA ARF KIT Features pre-assembled wood fuselage veneered plug-in wings stab er epoxy cowl Lexan canopy l UIC / details other Zimbabwe Model Products kits call write Full color deluxe catalog -$100 Manua u e uRep esen es& mpnrters n Fne can Pruducts -ZIMPRO MARKETING Authorized Warranty ServiceFREQUENCY CONVERSION $1000 Discount Regular Repair Moat Makes Models Converted Tuning Done Spectrum Analyzer K-LINE Also Service LIZi AU Futaba~5had Only Full Time Servicenter Midwest 117 East Main St Northvil le Michigan 48167 er Le~elJ e 1 -313-348-0085 Cyanoacrylate glue Two recent letters men tioned unpleasant experiences writers using CyA glue Neither resulted serious injury illness making aware what happened hope can save some griefand perhaps some bucks first Dave Powers Gastonia NC reason am writing pertains fact wear contact lenses bard lenses What has got sport Well fine until began use CyA glue building models Invariably some glue residue dries fingertips using debonder does get bit glue off Thus lend up scratching contacts cleaning fingers before putting dont plan give up using glue plan using latex fingertips available drug store Just thought would pass information along other lenswearers alert careful results can get expensive Although vision such have wear glasses have never invested contact lenses So Im speculating say seems residue fingers other glues aliphatic resin balsa cement may also cause scratches during contact-lens-wiping operations second letter came Hank Nystrom Johnson City TN also wears glasses credits preventing eye injury Hank following say about incident letter sent manufacturer glue usingContinued page 20 IORE LESS NOISE four-cycle measuring up expectations read Make engine before Make 60 120 four-stroke less means 1 Quieter glow 2 More mellow sounding four-cycle 3 More usable power both 4 Highest power-to-weight ratio 5 The lowest idle ever 6 Increase mileage up 4 times 7 Runs cooler glow 8 No glowplugs fail 9 Increased reliability 10 Fuel available concentrate Conversion kits available 049 30 cid Schnuerle ported engines Its sim ple just change heads fuel What waiting Dust off two-cycle DIESELIZE Send self-addressed stamped enve lope $100 information call 203-877-1670 between 730 pm 930 pm EST Mon-Fri DAVIS DIESEL DEVELOPMENT PO Box 141 Milford CT 06460 The leader quiet combustion technology since 1976 18 Model Aviation model like fly likely have Carry Largest Only StockLethal Threshold exceeds 57 ft-lb So Kraft Parts WorldKraft IsDon Lowe stated May column must oil fly safely alive working KRAFT MIDWEST recently incident using product feel need made aware two-ounce bottle glue developed annoying tendency clog up tip Because gotten habit squeezing bottle see breathing through tip before tipping bottle over workpiece time bottle ruptured halfway around circumference about midway between top bottom Note vertical seam let go split around diameter bottle pop CyA glue went everywhere Fortuntely wearing reading glasses eyes protected spray Needless say bottle remaining contents went shop trash can important results could have far worse bottle split below liquid level line has never happened before would seem indicate problem could strike again Per haps should warn customers see can obtain bottles formulated material less likely split squeezed previous Safety column published account similar incident modeler listening sound bottle breathing ended up ear full CyA glue dont remember whether result bottle rupturing cap coming off Considering number bottles CyA glue must sold year together fact Ive two letters subject rupturing bottles dont view serious problem However think should aware could happen Other potential health hazards recently re Continued page 22 87 Cool JN4 Jenny $3Yjjb$ Moogoto Bb $42 $4 Fobbe 87 Fl $39 108 DH MooqoBonb $55 70 Boylee GeoBee $32 98 Steo FTt 7Koydet $56 nd Pete Rote $32 99 NBIk Widoon P61 $69 6O Snpennnonine S68 $24 71 Soog DC-3 C47 $35 Sopennnonine 568 $35 95 Song DC3 C47 $55 Henl 96$ $42 06 Hoeoko0eoeool2 $32 94 Cot Henok P6E $54t 64 Stoot SkyCo $18 74 DoeIiOleoG-B 11 $48 72Co02111/4 t&S $46 95 Menoooope Spol $36 108 Con 0201/4 L&5 $36 $5 Hell Spn Bolldog $43- 60 Dooglot M-2 Molt $24 107 Aenonto C-S Opt $35 68 Betlol BoIldog FIn 030 ed Rooc Ike $40- 09 BoonRoe MOtA $54 7$ Oo,neo WW Ron $35 107 Onno Beonol P89 $54 Ink Ft IC $42 69 [jedbogo NX21 1 $28 h Fl iC $54 91 tindbegt NX21 1 $29 0001 Ron $24 96 WoNWiNon Ron $48 62 HooeMnMolligo, $35 74 C Ploildon S$2C4 $55 *94 Hoon 09 Molligo, $45150 FoiotnPT19 T $5963 Boeing F26A Fl $3660 Woco TopenWing $36 4 Boeing P26A Ftn $4890 Wono TopeWing 848 C6 Cobb $3675 Woolld tyonodon $32 *64 RecoIn C170 Slog $38105 WoolId Lnoonde $49 9 ceon C170 Slog 049 51Fon4 0101 4AT $36 55 tool 11 Eleolo$3076 Fond Tninntn 4AT $48 02 took 11 Eleenno$40114 Fo4 Tninln 4AT $65 62 Slinooo 71W SR7$1896 Bellonee Alnonoio $40 81 Snbnoon 71W 08782693 boning C2AnpIn $69 122 Stinoon 71W SR7 83858 Gnon J3p Dock $39 59 $nitol PIn P28 $20 78 Onon 129 $ook $56 110 BnioloI Pt P2-B 845124 took Al Fopeoe $48 74Tonnono Peono $4562IokA Enpeto $24 56 Con WorIl P40 $24 03 took Fop eoo $26 ogI Corool F4U $35 77W Wono 121 RedI $48 00 VogI Cononin P40$6962 C Seohonok F7C1 845 l 78 took tigintog P30$3894 C Seohoonk P7C1 $07 56 OopSooBee An$24108 5ko 030 AnpI $49 748 74 RopSeoBee An$3960 Bee no 100 Spo 1836 70 Pipe 13 Cob$2990 Roe ng 150 Spo $49~ 156 Pipe 53 Cob $3972 No hop Gonoo $40 90 Lonk Rodoon BonIn$3896 No op Goono 875 63 Onon F6F Helloot$28POSt no loon 3 M $56 77$oeiogRl7GFonl$256OStno 2 M$42 103 Roe 817G P018221205 noA ton3 M$82 60 WeolI WInnInind$3278 Con o Co PRISA $42 60 N Anne Noobon$39104 Con Co POY 5A $56 Oononen Vyol$3965 M Cl no Cl ope 865 77 toononbe Sedon$2597 09 Ch no Cl opo 72 NA 825 $OoIoe 849 62 Co too NC 4$59 * 65 l4ldooode 826 $49 94 Co too NC 4$69 tie teetootos 00*3000 tOO CANT RON 8 Sold Tbo Deoleno Pioeoooln 00 0 oInonge~lYn Ono 1400 94oe SOt Op 6124 Fo Alnooyo lno Add 10% oIl odeo fon otoipp 00$ no eo o Con & ldeo Eloenokene ito 15% 25 Fioloniol notolog $200 linolode Pnlne boll Pone teotion oboe $1 SO bn 01, foeon odd $100 LE VELAND MODEL & SUPPLY Co , te 0000 000, 000000 tO00t3000tAtOO 0 EOt tIONOOINOE Ott OnCOOI,00000000 10307$ DETROIT AVE CLEVEtANO OHIO 44102 on,OooooooOtonono hone toO 12PM 850 IOn 8Sll12161 9613400 OWO0OCtOOOO000 CLEVELAND GIANTS FOR GIANT SCALE BUFFS ,cludes HY-lA MOTOR B-52 FUGHT BATTERY TWO PROPS CHARGE PLUG CONNECTORS ACCESSORY PKG w/extra screws 20 Model Aviation 7 L TM POSI-CURE CYANOACRYLATE • LA viI 1 1 Es] SPECIAL INTRODUCTORY OFFER List Sale 1 oz Fast Cure 3-5 Sec $249 Savings 500/a Off 2 oz Fast Cure 3-5 Sec895$396 56% Off 1 oz Gap-Filling 5 Sec 2 oz Gap-Filling 5 Sec895$396 OUR GUARANTEE TO YOU satisfied POSI-CURE please return unused portion within 30 days full refundNo questions asked SHELDONS HOBBY SHOP 2135 Old Oakland Rd Jose CA 95131 FOR ORDERS ONLY PLEASEVISK 800 228-3237 822-1688 Out StateIn California $395 SHIPPING INFO 408 9430872per order Hours Mon-Wed Fri & Sat 930-530 FAST SERVICE Thur 930-900 1200-500 COD ADD $190 500/o Off 56% Off [DCO SKY D[VIL 65 Igmrion Approxed 90 Day Warraiity Twin Ball Bearing Crank Americas finest old-timer engine Originally designed Hassad & Havlik replica engine resonic tuning ensures continuous flow power through speed range Look out green goodbye red headT&Ds replica Sky Devil 65 $279 less coil cond & plug Calif residents add 6% sales tax ORDER DIRECT T&D RESEARCH AssocIAms 6371 El Cajon Blvd Suite 115 San Diego CA 92115 $1 FOR BROCHURE ceived copy publication DuPont Company titled Managing Safely sent Anthony Cantarella Western Region manager Safety Services DuPont also happens RC modeler publi cation article titled Hobbies Can Hurt contained some tips feel worth passing entire article follows People enjoy arts crafts home may realize materials use can cause health problems example lead used glazes can haled build up body cause nausea constipation various aches pains Sol vents lik used spray paint permanent markers rubber cement epoxy glues can cause headaches dizziness eye irritation dermatitis Exposure other substances may take years before people begin suffer ill effects industrial workers may exposed toxins often supplied protective equipment andwork controlled environ ments itiay true homes some same hazardous materials used minimize risks arts crafts take precautions Make sure work space has adequate ventilation need some kind system remove contaminated air supply fresh airmore simply opening window Dont eat drink smoke work area reduce chances accidentally ng hazardous materials break meals make habit wash hands carefully time leave project Wear proper protective equipment Depend ing what materials processes work Continued page 136 TRIM KNIFE Trim Knife designed precisely edge trim excess cover ing material model Can used outside soges straight curved Blade can set 1/16 1/4 simple adjustment screw Trim Knife will make perfect overlap butt seams Works covering materials 6 blades Trim Knife Set includes 6 blades $900 Trim Knits Blades 5 per pack $300 No Notches Straight cuts Heavy duty extra sharp no notch blade Same size 55 regular blades tip does flex cutting strip ping theker materials Great big birds Big Bird Blades box 100 blades$950 Trial size oackaoe 20 blades$250 22 Model Aviation NOR THEA ST AEROD YNAMICS 61C LEBANON STREET ORD ME 04073 490-1881 TRAIN-AIR 20 TRAIN-AIR 40 SPORT-AIR 40 BEL-AIR 40 AO U See local dealer call us referral BEL-AIR 60 Safety Preston Continued page 22 wear gloves dust masks safety gog gles special clothing respirators Learn about chemicals materials what precautions should taken working Study warning labels have questions contact manu facturer ask safety data sheets can replace hazardous materials safer ones Store materials original containers keep covered Keep work area clean Wipe up flammable liquid spills immediately put soaked rags tightly-covered trash container Dispose chemicals properly have World famous kits Europe Large magnificent replicas over 4 feet long beautiful walnut mahogany planking fittings details exquisitely cast bronze brass rare hardwoods Large scale plans step-bystep instructions materials included VHS Video tapecassette howto build also available Send 64-pg full-color catalog $100 MODEL EXPO INC Dept MA-77S 23 Just Road Fairfield NJ 07007 Please send full color ship model catalog $100 enclosed Name questions about disposal contact local health fire department Dont work flammable materials near ignition source such open flame heater water heater cigarette suffer asthma emphysema aller gies heart condition check doctor about materials processes work pregnant ask doctor about continuing hobby also applies wives male hobbyists JP Space out sessions hobby give body time recover between pos sible exposures Ive previously mentioned number above DuPont safety tips dont think can hurt repeat continue see new comers enter hobby may aware some hazards associated products use Before leaving subject potentially haz ardous chemicals want mention two have seemingly similar names have very different properties methyl ethyl ketone MEK methyl ethyl ketone peroxide MEKP MEK solvent commonly used join styrene plastic products Chemically closely related ace tone addition being another common modeling solvent may well principal gredient wifes girlfriends nail polish remover recent letter claimed writer told never allow MEK come contact ones skin since readily ab sorbed ones system will stay until die letter-writer also stated told MEK will cause permanent blind ness upon contact eyeball latter statement leads believe confusing MEK MEKP Methyl ethyl ketone peroxide MEKP clear liquid hardener accompanies polyester resin strong oxidizer extreme care should taken avoid getting drop ones eye Such mishap could well result permanent eye damage blindness would rather get drop methyl ethyl ketone MEK eye does present anywhere near same hazard eyes does MEKP eyes immediately flushed water upon contact MEK no lasting damage should result Similarly am aware MEK presents hazard due skin contact Cyanoacrylate CyA glues have also con fused MEKP some letter-writers writers believed mere drop CyA eye would result instant blindness drop CyA glue eye may well cause eyelids become stuck together likely will very uncomfortable its likely will result permanent damage However would urge take precautions against getting anything eye days ever find time would like list various chemicals use hobby together associated hazards handling precautions Meanwhile urge take care John Preston 2812 Northampton St N W Washington DC 20015 Low Voltage/Marron Continued page 34 /I6 Make sure kill switch off position check controls working properly right direction Since plane light glides well its easy trim out standing top small hill firmly throwing power nose level slightly down wind Make whatever adjustments necessary before attempting powered flight Top Flite nylon 6 x 4 prop installed turn kill switch check proper control surface movement start motor Launch model good shove nose down prevent stall let fly straight level until picks up speed Start feeding some up elevator remembering small electric motor doesnt have much power snarling glow engine Low Voltage has gained some height heart starts beating nor mally again put through some maneuvers get feel control responses Make mental notes adjustments may needed After about 4 5 min will hear whine motor noticeably decrease pitch model wont climb Its time shut off mjttor prepare landing ailerons effective down stall speed experienced landing planes landing gear will pleasantly surprised ease accomplished responding advertisers mention read about ModelAviation 136 Model Aviation city State_____________________ Zip
Edition: Model Aviation - 1987/07
Page Numbers: 14, 16, 18, 20, 22, 136
___John Preston___________________________ Safety Comes First Big models/little models have kinetic energy flight can pose danger people property Sum mary hobby health hazards BIG MODELS April 1987 issue Model Aviation column outlined two plans submitted AMA VP suggested way models weighing current maximum 55 lb see Official AMA Safety Code General paragraph 5 might safely flown nutshell plans either Remove 55-lb weight limit entirely allow models weight flown pro vided meet certain safety criteria 2 Keep current 55-lb weight limit establish spe cial Experimental category would have weight limit would again require mod els category meet certain safety criteria asked comments readers merits two plans Response overwhelming received enough letters convince Plan No remove 55-lb weight limit entirely favored Respondents cited number reasons did favor Plan No Generally felt weight limit heavy models would built flown would conform safety criteria favored Plan No 2 stated mod elers desiring build heavy model Ex perimental category should have bear extra insurance cost themselves impose such burden majority AMA membership have no desire build such large models seems fair may possible now essentially self-insured organi zation As AMA President Don Lowe pointed Out segment Big Models column AMA News May 1987 issue bottom line must fly safely whether fly big ones little ones current self-insurance program total assets AMA line Before leaving subject model weight limits Id like pass some comments letter subject Bill Kincheloe Magalia CA Bill favored Plan Continued page 16 14 Model Aviation CANT SPEAJ Fo czuv 541 WHArS ThE 6I D8AL ABOUT MOIEL WEtdMT column provided S address lieu 9 corner reeardlug safely aipacis 9 model evleilen acSIvIUes Content 9 SI. column however SI. opIulon 9th auth audi. uS necessarily represent official position 95k Academy 9 Model Aeronauties / 10 Bill Kinchelos sent Interesting chart Theres Information column including what meant lethal threshold Read heedi tLI Lets enjoy outdoors ort ~' Little World Comfort Hot Burning Summer Days Convenient Size Portable Shade Thats Guick Set up Change Instantly Give Protection Front Weathert Size 72 n 120 60 sq ft Add units double triple etc size PortaShade available Add 05 Units can used trailer awnings patio covers etc PortaShade convenient size has no center pole useable space can straddle picnic table model airplane small vehicle canopy strong heat retlecting waterproot material white top side unique tear proof corner tittings no grommets stands almost 7 tall strong 1 aluminum poles can stand work play under comtort wind resistant ed 40 MPH PortaShade very taut easy install beach picnic mountains anywhere want protection trom elements Set up very quick person can about 5 minutes can adjusted easily tilt against sun can set up vertically us windbreak Master CardVisaMoney OrdersChecks Dealer Inquiries Invited 4M Co Dept M 814 N Shawnee Dewey OK 74029 P hone 918-534-2244 Sportsman Model/PFR4-60 Economy Model/EPFR4-60 $3995 PS $3295 PS No 2but condition enforceable rules can drafted concerning pilots creden tials verification models airworthiness Bill engineer before retired worked designer weapon systems ordnance devices Enclosed letter graphical plot kinetic energy models weighing 15 10 50 lb respect velocity previous discussions model weight limits column Ive talked about kinetic energy should perhaps concern us just model weight However Bill has cluded some additional information plot thought might interest readers quoting letter Ill let Bill explain term Lethal Threshold plot new piece information PO BOX 3076 OAK RIDGE TENNESSEE 37830 Tel 615482-6188 experience may available want argue safety point Lethal Threshold t-lb line Now no longer used military once criterion weapon judged calculated results thousands wounds recorded during Civil War World War World War II Korea being energy dissipated vulnerable area human being has 70% chance killing person enjoy statistics probabilities probability modified multiplying probability missile question hits vulnerable area So can say prob ability lethal accident low because prob ability being hit low Im prepared estimate low acceptable Im sure underwriters wont accept very large number like 10% what see chart equal potential harm seven-to-one velocity increment 50-to-one weight change isnt surprising since seven squared 49 calculations led seven rounded What important whatever lethal threshold accept heavier model has sig nificantly greater potential harm smaller have agree Bill heavier model its potential harm However others have pointed out large models tend fly slower small ones therefore give bystanders time get out way event loss control pilot other words probability being struck large model despite its extra frontal area may less being struck small fast model real reason elected reproduce Bills graph show no matter what sizes Continued page 18 16 Model Aviation liti 74. r ROUSH KITS TaylorCraft Full apan 108 Ante 1670 Clipped 84 Area 1300 Power 75 no 12 cu Baleaft Ply 10l2lba $9996 Super Sport 120 Span 73 Area 960 Power 75 12 cii $9996 Super Kwik FII Span 70 Area 927 Power 75 12 Cu *8996 Coming Soon Two new enervdav scale airplanes 80 AT-6 78 P51 75-120 engines Both $9996 Jr Sticks Span fl Area 1080 Power 75 12 Cu $6995 Direct Sales Only Prices Include Shipping Send $100 Catalog ROUSH MFG 1726 Dywood St IE L Cast. Ohio 44707 21k 4644610 EXTRA 230 SPAN 76 AREA 900 sq POWER 4 stroke 120 ALL BALSA ARF KIT Features pre-assembled wood fuselage veneered plug-in wings stab er epoxy cowl Lexan canopy l UIC / details other Zimbabwe Model Products kits call write Full color deluxe catalog -$100 Manua u e uRep esen es& mpnrters n Fne can Pruducts -ZIMPRO MARKETING Authorized Warranty ServiceFREQUENCY CONVERSION $1000 Discount Regular Repair Moat Makes Models Converted Tuning Done Spectrum Analyzer K-LINE Also Service LIZi AU Futaba~5had Only Full Time Servicenter Midwest 117 East Main St Northvil le Michigan 48167 er Le~elJ e 1 -313-348-0085 Cyanoacrylate glue Two recent letters men tioned unpleasant experiences writers using CyA glue Neither resulted serious injury illness making aware what happened hope can save some griefand perhaps some bucks first Dave Powers Gastonia NC reason am writing pertains fact wear contact lenses bard lenses What has got sport Well fine until began use CyA glue building models Invariably some glue residue dries fingertips using debonder does get bit glue off Thus lend up scratching contacts cleaning fingers before putting dont plan give up using glue plan using latex fingertips available drug store Just thought would pass information along other lenswearers alert careful results can get expensive Although vision such have wear glasses have never invested contact lenses So Im speculating say seems residue fingers other glues aliphatic resin balsa cement may also cause scratches during contact-lens-wiping operations second letter came Hank Nystrom Johnson City TN also wears glasses credits preventing eye injury Hank following say about incident letter sent manufacturer glue usingContinued page 20 IORE LESS NOISE four-cycle measuring up expectations read Make engine before Make 60 120 four-stroke less means 1 Quieter glow 2 More mellow sounding four-cycle 3 More usable power both 4 Highest power-to-weight ratio 5 The lowest idle ever 6 Increase mileage up 4 times 7 Runs cooler glow 8 No glowplugs fail 9 Increased reliability 10 Fuel available concentrate Conversion kits available 049 30 cid Schnuerle ported engines Its sim ple just change heads fuel What waiting Dust off two-cycle DIESELIZE Send self-addressed stamped enve lope $100 information call 203-877-1670 between 730 pm 930 pm EST Mon-Fri DAVIS DIESEL DEVELOPMENT PO Box 141 Milford CT 06460 The leader quiet combustion technology since 1976 18 Model Aviation model like fly likely have Carry Largest Only StockLethal Threshold exceeds 57 ft-lb So Kraft Parts WorldKraft IsDon Lowe stated May column must oil fly safely alive working KRAFT MIDWEST recently incident using product feel need made aware two-ounce bottle glue developed annoying tendency clog up tip Because gotten habit squeezing bottle see breathing through tip before tipping bottle over workpiece time bottle ruptured halfway around circumference about midway between top bottom Note vertical seam let go split around diameter bottle pop CyA glue went everywhere Fortuntely wearing reading glasses eyes protected spray Needless say bottle remaining contents went shop trash can important results could have far worse bottle split below liquid level line has never happened before would seem indicate problem could strike again Per haps should warn customers see can obtain bottles formulated material less likely split squeezed previous Safety column published account similar incident modeler listening sound bottle breathing ended up ear full CyA glue dont remember whether result bottle rupturing cap coming off Considering number bottles CyA glue must sold year together fact Ive two letters subject rupturing bottles dont view serious problem However think should aware could happen Other potential health hazards recently re Continued page 22 87 Cool JN4 Jenny $3Yjjb$ Moogoto Bb $42 $4 Fobbe 87 Fl $39 108 DH MooqoBonb $55 70 Boylee GeoBee $32 98 Steo FTt 7Koydet $56 nd Pete Rote $32 99 NBIk Widoon P61 $69 6O Snpennnonine S68 $24 71 Soog DC-3 C47 $35 Sopennnonine 568 $35 95 Song DC3 C47 $55 Henl 96$ $42 06 Hoeoko0eoeool2 $32 94 Cot Henok P6E $54t 64 Stoot SkyCo $18 74 DoeIiOleoG-B 11 $48 72Co02111/4 t&S $46 95 Menoooope Spol $36 108 Con 0201/4 L&5 $36 $5 Hell Spn Bolldog $43- 60 Dooglot M-2 Molt $24 107 Aenonto C-S Opt $35 68 Betlol BoIldog FIn 030 ed Rooc Ike $40- 09 BoonRoe MOtA $54 7$ Oo,neo WW Ron $35 107 Onno Beonol P89 $54 Ink Ft IC $42 69 [jedbogo NX21 1 $28 h Fl iC $54 91 tindbegt NX21 1 $29 0001 Ron $24 96 WoNWiNon Ron $48 62 HooeMnMolligo, $35 74 C Ploildon S$2C4 $55 *94 Hoon 09 Molligo, $45150 FoiotnPT19 T $5963 Boeing F26A Fl $3660 Woco TopenWing $36 4 Boeing P26A Ftn $4890 Wono TopeWing 848 C6 Cobb $3675 Woolld tyonodon $32 *64 RecoIn C170 Slog $38105 WoolId Lnoonde $49 9 ceon C170 Slog 049 51Fon4 0101 4AT $36 55 tool 11 Eleolo$3076 Fond Tninntn 4AT $48 02 took 11 Eleenno$40114 Fo4 Tninln 4AT $65 62 Slinooo 71W SR7$1896 Bellonee Alnonoio $40 81 Snbnoon 71W 08782693 boning C2AnpIn $69 122 Stinoon 71W SR7 83858 Gnon J3p Dock $39 59 $nitol PIn P28 $20 78 Onon 129 $ook $56 110 BnioloI Pt P2-B 845124 took Al Fopeoe $48 74Tonnono Peono $4562IokA Enpeto $24 56 Con WorIl P40 $24 03 took Fop eoo $26 ogI Corool F4U $35 77W Wono 121 RedI $48 00 VogI Cononin P40$6962 C Seohonok F7C1 845 l 78 took tigintog P30$3894 C Seohoonk P7C1 $07 56 OopSooBee An$24108 5ko 030 AnpI $49 748 74 RopSeoBee An$3960 Bee no 100 Spo 1836 70 Pipe 13 Cob$2990 Roe ng 150 Spo $49~ 156 Pipe 53 Cob $3972 No hop Gonoo $40 90 Lonk Rodoon BonIn$3896 No op Goono 875 63 Onon F6F Helloot$28POSt no loon 3 M $56 77$oeiogRl7GFonl$256OStno 2 M$42 103 Roe 817G P018221205 noA ton3 M$82 60 WeolI WInnInind$3278 Con o Co PRISA $42 60 N Anne Noobon$39104 Con Co POY 5A $56 Oononen Vyol$3965 M Cl no Cl ope 865 77 toononbe Sedon$2597 09 Ch no Cl opo 72 NA 825 $OoIoe 849 62 Co too NC 4$59 * 65 l4ldooode 826 $49 94 Co too NC 4$69 tie teetootos 00*3000 tOO CANT RON 8 Sold Tbo Deoleno Pioeoooln 00 0 oInonge~lYn Ono 1400 94oe SOt Op 6124 Fo Alnooyo lno Add 10% oIl odeo fon otoipp 00$ no eo o Con & ldeo Eloenokene ito 15% 25 Fioloniol notolog $200 linolode Pnlne boll Pone teotion oboe $1 SO bn 01, foeon odd $100 LE VELAND MODEL & SUPPLY Co , te 0000 000, 000000 tO00t3000tAtOO 0 EOt tIONOOINOE Ott OnCOOI,00000000 10307$ DETROIT AVE CLEVEtANO OHIO 44102 on,OooooooOtonono hone toO 12PM 850 IOn 8Sll12161 9613400 OWO0OCtOOOO000 CLEVELAND GIANTS FOR GIANT SCALE BUFFS ,cludes HY-lA MOTOR B-52 FUGHT BATTERY TWO PROPS CHARGE PLUG CONNECTORS ACCESSORY PKG w/extra screws 20 Model Aviation 7 L TM POSI-CURE CYANOACRYLATE • LA viI 1 1 Es] SPECIAL INTRODUCTORY OFFER List Sale 1 oz Fast Cure 3-5 Sec $249 Savings 500/a Off 2 oz Fast Cure 3-5 Sec895$396 56% Off 1 oz Gap-Filling 5 Sec 2 oz Gap-Filling 5 Sec895$396 OUR GUARANTEE TO YOU satisfied POSI-CURE please return unused portion within 30 days full refundNo questions asked SHELDONS HOBBY SHOP 2135 Old Oakland Rd Jose CA 95131 FOR ORDERS ONLY PLEASEVISK 800 228-3237 822-1688 Out StateIn California $395 SHIPPING INFO 408 9430872per order Hours Mon-Wed Fri & Sat 930-530 FAST SERVICE Thur 930-900 1200-500 COD ADD $190 500/o Off 56% Off [DCO SKY D[VIL 65 Igmrion Approxed 90 Day Warraiity Twin Ball Bearing Crank Americas finest old-timer engine Originally designed Hassad & Havlik replica engine resonic tuning ensures continuous flow power through speed range Look out green goodbye red headT&Ds replica Sky Devil 65 $279 less coil cond & plug Calif residents add 6% sales tax ORDER DIRECT T&D RESEARCH AssocIAms 6371 El Cajon Blvd Suite 115 San Diego CA 92115 $1 FOR BROCHURE ceived copy publication DuPont Company titled Managing Safely sent Anthony Cantarella Western Region manager Safety Services DuPont also happens RC modeler publi cation article titled Hobbies Can Hurt contained some tips feel worth passing entire article follows People enjoy arts crafts home may realize materials use can cause health problems example lead used glazes can haled build up body cause nausea constipation various aches pains Sol vents lik used spray paint permanent markers rubber cement epoxy glues can cause headaches dizziness eye irritation dermatitis Exposure other substances may take years before people begin suffer ill effects industrial workers may exposed toxins often supplied protective equipment andwork controlled environ ments itiay true homes some same hazardous materials used minimize risks arts crafts take precautions Make sure work space has adequate ventilation need some kind system remove contaminated air supply fresh airmore simply opening window Dont eat drink smoke work area reduce chances accidentally ng hazardous materials break meals make habit wash hands carefully time leave project Wear proper protective equipment Depend ing what materials processes work Continued page 136 TRIM KNIFE Trim Knife designed precisely edge trim excess cover ing material model Can used outside soges straight curved Blade can set 1/16 1/4 simple adjustment screw Trim Knife will make perfect overlap butt seams Works covering materials 6 blades Trim Knife Set includes 6 blades $900 Trim Knits Blades 5 per pack $300 No Notches Straight cuts Heavy duty extra sharp no notch blade Same size 55 regular blades tip does flex cutting strip ping theker materials Great big birds Big Bird Blades box 100 blades$950 Trial size oackaoe 20 blades$250 22 Model Aviation NOR THEA ST AEROD YNAMICS 61C LEBANON STREET ORD ME 04073 490-1881 TRAIN-AIR 20 TRAIN-AIR 40 SPORT-AIR 40 BEL-AIR 40 AO U See local dealer call us referral BEL-AIR 60 Safety Preston Continued page 22 wear gloves dust masks safety gog gles special clothing respirators Learn about chemicals materials what precautions should taken working Study warning labels have questions contact manu facturer ask safety data sheets can replace hazardous materials safer ones Store materials original containers keep covered Keep work area clean Wipe up flammable liquid spills immediately put soaked rags tightly-covered trash container Dispose chemicals properly have World famous kits Europe Large magnificent replicas over 4 feet long beautiful walnut mahogany planking fittings details exquisitely cast bronze brass rare hardwoods Large scale plans step-bystep instructions materials included VHS Video tapecassette howto build also available Send 64-pg full-color catalog $100 MODEL EXPO INC Dept MA-77S 23 Just Road Fairfield NJ 07007 Please send full color ship model catalog $100 enclosed Name questions about disposal contact local health fire department Dont work flammable materials near ignition source such open flame heater water heater cigarette suffer asthma emphysema aller gies heart condition check doctor about materials processes work pregnant ask doctor about continuing hobby also applies wives male hobbyists JP Space out sessions hobby give body time recover between pos sible exposures Ive previously mentioned number above DuPont safety tips dont think can hurt repeat continue see new comers enter hobby may aware some hazards associated products use Before leaving subject potentially haz ardous chemicals want mention two have seemingly similar names have very different properties methyl ethyl ketone MEK methyl ethyl ketone peroxide MEKP MEK solvent commonly used join styrene plastic products Chemically closely related ace tone addition being another common modeling solvent may well principal gredient wifes girlfriends nail polish remover recent letter claimed writer told never allow MEK come contact ones skin since readily ab sorbed ones system will stay until die letter-writer also stated told MEK will cause permanent blind ness upon contact eyeball latter statement leads believe confusing MEK MEKP Methyl ethyl ketone peroxide MEKP clear liquid hardener accompanies polyester resin strong oxidizer extreme care should taken avoid getting drop ones eye Such mishap could well result permanent eye damage blindness would rather get drop methyl ethyl ketone MEK eye does present anywhere near same hazard eyes does MEKP eyes immediately flushed water upon contact MEK no lasting damage should result Similarly am aware MEK presents hazard due skin contact Cyanoacrylate CyA glues have also con fused MEKP some letter-writers writers believed mere drop CyA eye would result instant blindness drop CyA glue eye may well cause eyelids become stuck together likely will very uncomfortable its likely will result permanent damage However would urge take precautions against getting anything eye days ever find time would like list various chemicals use hobby together associated hazards handling precautions Meanwhile urge take care John Preston 2812 Northampton St N W Washington DC 20015 Low Voltage/Marron Continued page 34 /I6 Make sure kill switch off position check controls working properly right direction Since plane light glides well its easy trim out standing top small hill firmly throwing power nose level slightly down wind Make whatever adjustments necessary before attempting powered flight Top Flite nylon 6 x 4 prop installed turn kill switch check proper control surface movement start motor Launch model good shove nose down prevent stall let fly straight level until picks up speed Start feeding some up elevator remembering small electric motor doesnt have much power snarling glow engine Low Voltage has gained some height heart starts beating nor mally again put through some maneuvers get feel control responses Make mental notes adjustments may needed After about 4 5 min will hear whine motor noticeably decrease pitch model wont climb Its time shut off mjttor prepare landing ailerons effective down stall speed experienced landing planes landing gear will pleasantly surprised ease accomplished responding advertisers mention read about ModelAviation 136 Model Aviation city State_____________________ Zip
Edition: Model Aviation - 1987/07
Page Numbers: 14, 16, 18, 20, 22, 136
___John Preston___________________________ Safety Comes First Big models/little models have kinetic energy flight can pose danger people property Sum mary hobby health hazards BIG MODELS April 1987 issue Model Aviation column outlined two plans submitted AMA VP suggested way models weighing current maximum 55 lb see Official AMA Safety Code General paragraph 5 might safely flown nutshell plans either Remove 55-lb weight limit entirely allow models weight flown pro vided meet certain safety criteria 2 Keep current 55-lb weight limit establish spe cial Experimental category would have weight limit would again require mod els category meet certain safety criteria asked comments readers merits two plans Response overwhelming received enough letters convince Plan No remove 55-lb weight limit entirely favored Respondents cited number reasons did favor Plan No Generally felt weight limit heavy models would built flown would conform safety criteria favored Plan No 2 stated mod elers desiring build heavy model Ex perimental category should have bear extra insurance cost themselves impose such burden majority AMA membership have no desire build such large models seems fair may possible now essentially self-insured organi zation As AMA President Don Lowe pointed Out segment Big Models column AMA News May 1987 issue bottom line must fly safely whether fly big ones little ones current self-insurance program total assets AMA line Before leaving subject model weight limits Id like pass some comments letter subject Bill Kincheloe Magalia CA Bill favored Plan Continued page 16 14 Model Aviation CANT SPEAJ Fo czuv 541 WHArS ThE 6I D8AL ABOUT MOIEL WEtdMT column provided S address lieu 9 corner reeardlug safely aipacis 9 model evleilen acSIvIUes Content 9 SI. column however SI. opIulon 9th auth audi. uS necessarily represent official position 95k Academy 9 Model Aeronauties / 10 Bill Kinchelos sent Interesting chart Theres Information column including what meant lethal threshold Read heedi tLI Lets enjoy outdoors ort ~' Little World Comfort Hot Burning Summer Days Convenient Size Portable Shade Thats Guick Set up Change Instantly Give Protection Front Weathert Size 72 n 120 60 sq ft Add units double triple etc size PortaShade available Add 05 Units can used trailer awnings patio covers etc PortaShade convenient size has no center pole useable space can straddle picnic table model airplane small vehicle canopy strong heat retlecting waterproot material white top side unique tear proof corner tittings no grommets stands almost 7 tall strong 1 aluminum poles can stand work play under comtort wind resistant ed 40 MPH PortaShade very taut easy install beach picnic mountains anywhere want protection trom elements Set up very quick person can about 5 minutes can adjusted easily tilt against sun can set up vertically us windbreak Master CardVisaMoney OrdersChecks Dealer Inquiries Invited 4M Co Dept M 814 N Shawnee Dewey OK 74029 P hone 918-534-2244 Sportsman Model/PFR4-60 Economy Model/EPFR4-60 $3995 PS $3295 PS No 2but condition enforceable rules can drafted concerning pilots creden tials verification models airworthiness Bill engineer before retired worked designer weapon systems ordnance devices Enclosed letter graphical plot kinetic energy models weighing 15 10 50 lb respect velocity previous discussions model weight limits column Ive talked about kinetic energy should perhaps concern us just model weight However Bill has cluded some additional information plot thought might interest readers quoting letter Ill let Bill explain term Lethal Threshold plot new piece information PO BOX 3076 OAK RIDGE TENNESSEE 37830 Tel 615482-6188 experience may available want argue safety point Lethal Threshold t-lb line Now no longer used military once criterion weapon judged calculated results thousands wounds recorded during Civil War World War World War II Korea being energy dissipated vulnerable area human being has 70% chance killing person enjoy statistics probabilities probability modified multiplying probability missile question hits vulnerable area So can say prob ability lethal accident low because prob ability being hit low Im prepared estimate low acceptable Im sure underwriters wont accept very large number like 10% what see chart equal potential harm seven-to-one velocity increment 50-to-one weight change isnt surprising since seven squared 49 calculations led seven rounded What important whatever lethal threshold accept heavier model has sig nificantly greater potential harm smaller have agree Bill heavier model its potential harm However others have pointed out large models tend fly slower small ones therefore give bystanders time get out way event loss control pilot other words probability being struck large model despite its extra frontal area may less being struck small fast model real reason elected reproduce Bills graph show no matter what sizes Continued page 18 16 Model Aviation liti 74. r ROUSH KITS TaylorCraft Full apan 108 Ante 1670 Clipped 84 Area 1300 Power 75 no 12 cu Baleaft Ply 10l2lba $9996 Super Sport 120 Span 73 Area 960 Power 75 12 cii $9996 Super Kwik FII Span 70 Area 927 Power 75 12 Cu *8996 Coming Soon Two new enervdav scale airplanes 80 AT-6 78 P51 75-120 engines Both $9996 Jr Sticks Span fl Area 1080 Power 75 12 Cu $6995 Direct Sales Only Prices Include Shipping Send $100 Catalog ROUSH MFG 1726 Dywood St IE L Cast. Ohio 44707 21k 4644610 EXTRA 230 SPAN 76 AREA 900 sq POWER 4 stroke 120 ALL BALSA ARF KIT Features pre-assembled wood fuselage veneered plug-in wings stab er epoxy cowl Lexan canopy l UIC / details other Zimbabwe Model Products kits call write Full color deluxe catalog -$100 Manua u e uRep esen es& mpnrters n Fne can Pruducts -ZIMPRO MARKETING Authorized Warranty ServiceFREQUENCY CONVERSION $1000 Discount Regular Repair Moat Makes Models Converted Tuning Done Spectrum Analyzer K-LINE Also Service LIZi AU Futaba~5had Only Full Time Servicenter Midwest 117 East Main St Northvil le Michigan 48167 er Le~elJ e 1 -313-348-0085 Cyanoacrylate glue Two recent letters men tioned unpleasant experiences writers using CyA glue Neither resulted serious injury illness making aware what happened hope can save some griefand perhaps some bucks first Dave Powers Gastonia NC reason am writing pertains fact wear contact lenses bard lenses What has got sport Well fine until began use CyA glue building models Invariably some glue residue dries fingertips using debonder does get bit glue off Thus lend up scratching contacts cleaning fingers before putting dont plan give up using glue plan using latex fingertips available drug store Just thought would pass information along other lenswearers alert careful results can get expensive Although vision such have wear glasses have never invested contact lenses So Im speculating say seems residue fingers other glues aliphatic resin balsa cement may also cause scratches during contact-lens-wiping operations second letter came Hank Nystrom Johnson City TN also wears glasses credits preventing eye injury Hank following say about incident letter sent manufacturer glue usingContinued page 20 IORE LESS NOISE four-cycle measuring up expectations read Make engine before Make 60 120 four-stroke less means 1 Quieter glow 2 More mellow sounding four-cycle 3 More usable power both 4 Highest power-to-weight ratio 5 The lowest idle ever 6 Increase mileage up 4 times 7 Runs cooler glow 8 No glowplugs fail 9 Increased reliability 10 Fuel available concentrate Conversion kits available 049 30 cid Schnuerle ported engines Its sim ple just change heads fuel What waiting Dust off two-cycle DIESELIZE Send self-addressed stamped enve lope $100 information call 203-877-1670 between 730 pm 930 pm EST Mon-Fri DAVIS DIESEL DEVELOPMENT PO Box 141 Milford CT 06460 The leader quiet combustion technology since 1976 18 Model Aviation model like fly likely have Carry Largest Only StockLethal Threshold exceeds 57 ft-lb So Kraft Parts WorldKraft IsDon Lowe stated May column must oil fly safely alive working KRAFT MIDWEST recently incident using product feel need made aware two-ounce bottle glue developed annoying tendency clog up tip Because gotten habit squeezing bottle see breathing through tip before tipping bottle over workpiece time bottle ruptured halfway around circumference about midway between top bottom Note vertical seam let go split around diameter bottle pop CyA glue went everywhere Fortuntely wearing reading glasses eyes protected spray Needless say bottle remaining contents went shop trash can important results could have far worse bottle split below liquid level line has never happened before would seem indicate problem could strike again Per haps should warn customers see can obtain bottles formulated material less likely split squeezed previous Safety column published account similar incident modeler listening sound bottle breathing ended up ear full CyA glue dont remember whether result bottle rupturing cap coming off Considering number bottles CyA glue must sold year together fact Ive two letters subject rupturing bottles dont view serious problem However think should aware could happen Other potential health hazards recently re Continued page 22 87 Cool JN4 Jenny $3Yjjb$ Moogoto Bb $42 $4 Fobbe 87 Fl $39 108 DH MooqoBonb $55 70 Boylee GeoBee $32 98 Steo FTt 7Koydet $56 nd Pete Rote $32 99 NBIk Widoon P61 $69 6O Snpennnonine S68 $24 71 Soog DC-3 C47 $35 Sopennnonine 568 $35 95 Song DC3 C47 $55 Henl 96$ $42 06 Hoeoko0eoeool2 $32 94 Cot Henok P6E $54t 64 Stoot SkyCo $18 74 DoeIiOleoG-B 11 $48 72Co02111/4 t&S $46 95 Menoooope Spol $36 108 Con 0201/4 L&5 $36 $5 Hell Spn Bolldog $43- 60 Dooglot M-2 Molt $24 107 Aenonto C-S Opt $35 68 Betlol BoIldog FIn 030 ed Rooc Ike $40- 09 BoonRoe MOtA $54 7$ Oo,neo WW Ron $35 107 Onno Beonol P89 $54 Ink Ft IC $42 69 [jedbogo NX21 1 $28 h Fl iC $54 91 tindbegt NX21 1 $29 0001 Ron $24 96 WoNWiNon Ron $48 62 HooeMnMolligo, $35 74 C Ploildon S$2C4 $55 *94 Hoon 09 Molligo, $45150 FoiotnPT19 T $5963 Boeing F26A Fl $3660 Woco TopenWing $36 4 Boeing P26A Ftn $4890 Wono TopeWing 848 C6 Cobb $3675 Woolld tyonodon $32 *64 RecoIn C170 Slog $38105 WoolId Lnoonde $49 9 ceon C170 Slog 049 51Fon4 0101 4AT $36 55 tool 11 Eleolo$3076 Fond Tninntn 4AT $48 02 took 11 Eleenno$40114 Fo4 Tninln 4AT $65 62 Slinooo 71W SR7$1896 Bellonee Alnonoio $40 81 Snbnoon 71W 08782693 boning C2AnpIn $69 122 Stinoon 71W SR7 83858 Gnon J3p Dock $39 59 $nitol PIn P28 $20 78 Onon 129 $ook $56 110 BnioloI Pt P2-B 845124 took Al Fopeoe $48 74Tonnono Peono $4562IokA Enpeto $24 56 Con WorIl P40 $24 03 took Fop eoo $26 ogI Corool F4U $35 77W Wono 121 RedI $48 00 VogI Cononin P40$6962 C Seohonok F7C1 845 l 78 took tigintog P30$3894 C Seohoonk P7C1 $07 56 OopSooBee An$24108 5ko 030 AnpI $49 748 74 RopSeoBee An$3960 Bee no 100 Spo 1836 70 Pipe 13 Cob$2990 Roe ng 150 Spo $49~ 156 Pipe 53 Cob $3972 No hop Gonoo $40 90 Lonk Rodoon BonIn$3896 No op Goono 875 63 Onon F6F Helloot$28POSt no loon 3 M $56 77$oeiogRl7GFonl$256OStno 2 M$42 103 Roe 817G P018221205 noA ton3 M$82 60 WeolI WInnInind$3278 Con o Co PRISA $42 60 N Anne Noobon$39104 Con Co POY 5A $56 Oononen Vyol$3965 M Cl no Cl ope 865 77 toononbe Sedon$2597 09 Ch no Cl opo 72 NA 825 $OoIoe 849 62 Co too NC 4$59 * 65 l4ldooode 826 $49 94 Co too NC 4$69 tie teetootos 00*3000 tOO CANT RON 8 Sold Tbo Deoleno Pioeoooln 00 0 oInonge~lYn Ono 1400 94oe SOt Op 6124 Fo Alnooyo lno Add 10% oIl odeo fon otoipp 00$ no eo o Con & ldeo Eloenokene ito 15% 25 Fioloniol notolog $200 linolode Pnlne boll Pone teotion oboe $1 SO bn 01, foeon odd $100 LE VELAND MODEL & SUPPLY Co , te 0000 000, 000000 tO00t3000tAtOO 0 EOt tIONOOINOE Ott OnCOOI,00000000 10307$ DETROIT AVE CLEVEtANO OHIO 44102 on,OooooooOtonono hone toO 12PM 850 IOn 8Sll12161 9613400 OWO0OCtOOOO000 CLEVELAND GIANTS FOR GIANT SCALE BUFFS ,cludes HY-lA MOTOR B-52 FUGHT BATTERY TWO PROPS CHARGE PLUG CONNECTORS ACCESSORY PKG w/extra screws 20 Model Aviation 7 L TM POSI-CURE CYANOACRYLATE • LA viI 1 1 Es] SPECIAL INTRODUCTORY OFFER List Sale 1 oz Fast Cure 3-5 Sec $249 Savings 500/a Off 2 oz Fast Cure 3-5 Sec895$396 56% Off 1 oz Gap-Filling 5 Sec 2 oz Gap-Filling 5 Sec895$396 OUR GUARANTEE TO YOU satisfied POSI-CURE please return unused portion within 30 days full refundNo questions asked SHELDONS HOBBY SHOP 2135 Old Oakland Rd Jose CA 95131 FOR ORDERS ONLY PLEASEVISK 800 228-3237 822-1688 Out StateIn California $395 SHIPPING INFO 408 9430872per order Hours Mon-Wed Fri & Sat 930-530 FAST SERVICE Thur 930-900 1200-500 COD ADD $190 500/o Off 56% Off [DCO SKY D[VIL 65 Igmrion Approxed 90 Day Warraiity Twin Ball Bearing Crank Americas finest old-timer engine Originally designed Hassad & Havlik replica engine resonic tuning ensures continuous flow power through speed range Look out green goodbye red headT&Ds replica Sky Devil 65 $279 less coil cond & plug Calif residents add 6% sales tax ORDER DIRECT T&D RESEARCH AssocIAms 6371 El Cajon Blvd Suite 115 San Diego CA 92115 $1 FOR BROCHURE ceived copy publication DuPont Company titled Managing Safely sent Anthony Cantarella Western Region manager Safety Services DuPont also happens RC modeler publi cation article titled Hobbies Can Hurt contained some tips feel worth passing entire article follows People enjoy arts crafts home may realize materials use can cause health problems example lead used glazes can haled build up body cause nausea constipation various aches pains Sol vents lik used spray paint permanent markers rubber cement epoxy glues can cause headaches dizziness eye irritation dermatitis Exposure other substances may take years before people begin suffer ill effects industrial workers may exposed toxins often supplied protective equipment andwork controlled environ ments itiay true homes some same hazardous materials used minimize risks arts crafts take precautions Make sure work space has adequate ventilation need some kind system remove contaminated air supply fresh airmore simply opening window Dont eat drink smoke work area reduce chances accidentally ng hazardous materials break meals make habit wash hands carefully time leave project Wear proper protective equipment Depend ing what materials processes work Continued page 136 TRIM KNIFE Trim Knife designed precisely edge trim excess cover ing material model Can used outside soges straight curved Blade can set 1/16 1/4 simple adjustment screw Trim Knife will make perfect overlap butt seams Works covering materials 6 blades Trim Knife Set includes 6 blades $900 Trim Knits Blades 5 per pack $300 No Notches Straight cuts Heavy duty extra sharp no notch blade Same size 55 regular blades tip does flex cutting strip ping theker materials Great big birds Big Bird Blades box 100 blades$950 Trial size oackaoe 20 blades$250 22 Model Aviation NOR THEA ST AEROD YNAMICS 61C LEBANON STREET ORD ME 04073 490-1881 TRAIN-AIR 20 TRAIN-AIR 40 SPORT-AIR 40 BEL-AIR 40 AO U See local dealer call us referral BEL-AIR 60 Safety Preston Continued page 22 wear gloves dust masks safety gog gles special clothing respirators Learn about chemicals materials what precautions should taken working Study warning labels have questions contact manu facturer ask safety data sheets can replace hazardous materials safer ones Store materials original containers keep covered Keep work area clean Wipe up flammable liquid spills immediately put soaked rags tightly-covered trash container Dispose chemicals properly have World famous kits Europe Large magnificent replicas over 4 feet long beautiful walnut mahogany planking fittings details exquisitely cast bronze brass rare hardwoods Large scale plans step-bystep instructions materials included VHS Video tapecassette howto build also available Send 64-pg full-color catalog $100 MODEL EXPO INC Dept MA-77S 23 Just Road Fairfield NJ 07007 Please send full color ship model catalog $100 enclosed Name questions about disposal contact local health fire department Dont work flammable materials near ignition source such open flame heater water heater cigarette suffer asthma emphysema aller gies heart condition check doctor about materials processes work pregnant ask doctor about continuing hobby also applies wives male hobbyists JP Space out sessions hobby give body time recover between pos sible exposures Ive previously mentioned number above DuPont safety tips dont think can hurt repeat continue see new comers enter hobby may aware some hazards associated products use Before leaving subject potentially haz ardous chemicals want mention two have seemingly similar names have very different properties methyl ethyl ketone MEK methyl ethyl ketone peroxide MEKP MEK solvent commonly used join styrene plastic products Chemically closely related ace tone addition being another common modeling solvent may well principal gredient wifes girlfriends nail polish remover recent letter claimed writer told never allow MEK come contact ones skin since readily ab sorbed ones system will stay until die letter-writer also stated told MEK will cause permanent blind ness upon contact eyeball latter statement leads believe confusing MEK MEKP Methyl ethyl ketone peroxide MEKP clear liquid hardener accompanies polyester resin strong oxidizer extreme care should taken avoid getting drop ones eye Such mishap could well result permanent eye damage blindness would rather get drop methyl ethyl ketone MEK eye does present anywhere near same hazard eyes does MEKP eyes immediately flushed water upon contact MEK no lasting damage should result Similarly am aware MEK presents hazard due skin contact Cyanoacrylate CyA glues have also con fused MEKP some letter-writers writers believed mere drop CyA eye would result instant blindness drop CyA glue eye may well cause eyelids become stuck together likely will very uncomfortable its likely will result permanent damage However would urge take precautions against getting anything eye days ever find time would like list various chemicals use hobby together associated hazards handling precautions Meanwhile urge take care John Preston 2812 Northampton St N W Washington DC 20015 Low Voltage/Marron Continued page 34 /I6 Make sure kill switch off position check controls working properly right direction Since plane light glides well its easy trim out standing top small hill firmly throwing power nose level slightly down wind Make whatever adjustments necessary before attempting powered flight Top Flite nylon 6 x 4 prop installed turn kill switch check proper control surface movement start motor Launch model good shove nose down prevent stall let fly straight level until picks up speed Start feeding some up elevator remembering small electric motor doesnt have much power snarling glow engine Low Voltage has gained some height heart starts beating nor mally again put through some maneuvers get feel control responses Make mental notes adjustments may needed After about 4 5 min will hear whine motor noticeably decrease pitch model wont climb Its time shut off mjttor prepare landing ailerons effective down stall speed experienced landing planes landing gear will pleasantly surprised ease accomplished responding advertisers mention read about ModelAviation 136 Model Aviation city State_____________________ Zip
Edition: Model Aviation - 1987/07
Page Numbers: 14, 16, 18, 20, 22, 136
___John Preston___________________________ Safety Comes First Big models/little models have kinetic energy flight can pose danger people property Sum mary hobby health hazards BIG MODELS April 1987 issue Model Aviation column outlined two plans submitted AMA VP suggested way models weighing current maximum 55 lb see Official AMA Safety Code General paragraph 5 might safely flown nutshell plans either Remove 55-lb weight limit entirely allow models weight flown pro vided meet certain safety criteria 2 Keep current 55-lb weight limit establish spe cial Experimental category would have weight limit would again require mod els category meet certain safety criteria asked comments readers merits two plans Response overwhelming received enough letters convince Plan No remove 55-lb weight limit entirely favored Respondents cited number reasons did favor Plan No Generally felt weight limit heavy models would built flown would conform safety criteria favored Plan No 2 stated mod elers desiring build heavy model Ex perimental category should have bear extra insurance cost themselves impose such burden majority AMA membership have no desire build such large models seems fair may possible now essentially self-insured organi zation As AMA President Don Lowe pointed Out segment Big Models column AMA News May 1987 issue bottom line must fly safely whether fly big ones little ones current self-insurance program total assets AMA line Before leaving subject model weight limits Id like pass some comments letter subject Bill Kincheloe Magalia CA Bill favored Plan Continued page 16 14 Model Aviation CANT SPEAJ Fo czuv 541 WHArS ThE 6I D8AL ABOUT MOIEL WEtdMT column provided S address lieu 9 corner reeardlug safely aipacis 9 model evleilen acSIvIUes Content 9 SI. column however SI. opIulon 9th auth audi. uS necessarily represent official position 95k Academy 9 Model Aeronauties / 10 Bill Kinchelos sent Interesting chart Theres Information column including what meant lethal threshold Read heedi tLI Lets enjoy outdoors ort ~' Little World Comfort Hot Burning Summer Days Convenient Size Portable Shade Thats Guick Set up Change Instantly Give Protection Front Weathert Size 72 n 120 60 sq ft Add units double triple etc size PortaShade available Add 05 Units can used trailer awnings patio covers etc PortaShade convenient size has no center pole useable space can straddle picnic table model airplane small vehicle canopy strong heat retlecting waterproot material white top side unique tear proof corner tittings no grommets stands almost 7 tall strong 1 aluminum poles can stand work play under comtort wind resistant ed 40 MPH PortaShade very taut easy install beach picnic mountains anywhere want protection trom elements Set up very quick person can about 5 minutes can adjusted easily tilt against sun can set up vertically us windbreak Master CardVisaMoney OrdersChecks Dealer Inquiries Invited 4M Co Dept M 814 N Shawnee Dewey OK 74029 P hone 918-534-2244 Sportsman Model/PFR4-60 Economy Model/EPFR4-60 $3995 PS $3295 PS No 2but condition enforceable rules can drafted concerning pilots creden tials verification models airworthiness Bill engineer before retired worked designer weapon systems ordnance devices Enclosed letter graphical plot kinetic energy models weighing 15 10 50 lb respect velocity previous discussions model weight limits column Ive talked about kinetic energy should perhaps concern us just model weight However Bill has cluded some additional information plot thought might interest readers quoting letter Ill let Bill explain term Lethal Threshold plot new piece information PO BOX 3076 OAK RIDGE TENNESSEE 37830 Tel 615482-6188 experience may available want argue safety point Lethal Threshold t-lb line Now no longer used military once criterion weapon judged calculated results thousands wounds recorded during Civil War World War World War II Korea being energy dissipated vulnerable area human being has 70% chance killing person enjoy statistics probabilities probability modified multiplying probability missile question hits vulnerable area So can say prob ability lethal accident low because prob ability being hit low Im prepared estimate low acceptable Im sure underwriters wont accept very large number like 10% what see chart equal potential harm seven-to-one velocity increment 50-to-one weight change isnt surprising since seven squared 49 calculations led seven rounded What important whatever lethal threshold accept heavier model has sig nificantly greater potential harm smaller have agree Bill heavier model its potential harm However others have pointed out large models tend fly slower small ones therefore give bystanders time get out way event loss control pilot other words probability being struck large model despite its extra frontal area may less being struck small fast model real reason elected reproduce Bills graph show no matter what sizes Continued page 18 16 Model Aviation liti 74. r ROUSH KITS TaylorCraft Full apan 108 Ante 1670 Clipped 84 Area 1300 Power 75 no 12 cu Baleaft Ply 10l2lba $9996 Super Sport 120 Span 73 Area 960 Power 75 12 cii $9996 Super Kwik FII Span 70 Area 927 Power 75 12 Cu *8996 Coming Soon Two new enervdav scale airplanes 80 AT-6 78 P51 75-120 engines Both $9996 Jr Sticks Span fl Area 1080 Power 75 12 Cu $6995 Direct Sales Only Prices Include Shipping Send $100 Catalog ROUSH MFG 1726 Dywood St IE L Cast. Ohio 44707 21k 4644610 EXTRA 230 SPAN 76 AREA 900 sq POWER 4 stroke 120 ALL BALSA ARF KIT Features pre-assembled wood fuselage veneered plug-in wings stab er epoxy cowl Lexan canopy l UIC / details other Zimbabwe Model Products kits call write Full color deluxe catalog -$100 Manua u e uRep esen es& mpnrters n Fne can Pruducts -ZIMPRO MARKETING Authorized Warranty ServiceFREQUENCY CONVERSION $1000 Discount Regular Repair Moat Makes Models Converted Tuning Done Spectrum Analyzer K-LINE Also Service LIZi AU Futaba~5had Only Full Time Servicenter Midwest 117 East Main St Northvil le Michigan 48167 er Le~elJ e 1 -313-348-0085 Cyanoacrylate glue Two recent letters men tioned unpleasant experiences writers using CyA glue Neither resulted serious injury illness making aware what happened hope can save some griefand perhaps some bucks first Dave Powers Gastonia NC reason am writing pertains fact wear contact lenses bard lenses What has got sport Well fine until began use CyA glue building models Invariably some glue residue dries fingertips using debonder does get bit glue off Thus lend up scratching contacts cleaning fingers before putting dont plan give up using glue plan using latex fingertips available drug store Just thought would pass information along other lenswearers alert careful results can get expensive Although vision such have wear glasses have never invested contact lenses So Im speculating say seems residue fingers other glues aliphatic resin balsa cement may also cause scratches during contact-lens-wiping operations second letter came Hank Nystrom Johnson City TN also wears glasses credits preventing eye injury Hank following say about incident letter sent manufacturer glue usingContinued page 20 IORE LESS NOISE four-cycle measuring up expectations read Make engine before Make 60 120 four-stroke less means 1 Quieter glow 2 More mellow sounding four-cycle 3 More usable power both 4 Highest power-to-weight ratio 5 The lowest idle ever 6 Increase mileage up 4 times 7 Runs cooler glow 8 No glowplugs fail 9 Increased reliability 10 Fuel available concentrate Conversion kits available 049 30 cid Schnuerle ported engines Its sim ple just change heads fuel What waiting Dust off two-cycle DIESELIZE Send self-addressed stamped enve lope $100 information call 203-877-1670 between 730 pm 930 pm EST Mon-Fri DAVIS DIESEL DEVELOPMENT PO Box 141 Milford CT 06460 The leader quiet combustion technology since 1976 18 Model Aviation model like fly likely have Carry Largest Only StockLethal Threshold exceeds 57 ft-lb So Kraft Parts WorldKraft IsDon Lowe stated May column must oil fly safely alive working KRAFT MIDWEST recently incident using product feel need made aware two-ounce bottle glue developed annoying tendency clog up tip Because gotten habit squeezing bottle see breathing through tip before tipping bottle over workpiece time bottle ruptured halfway around circumference about midway between top bottom Note vertical seam let go split around diameter bottle pop CyA glue went everywhere Fortuntely wearing reading glasses eyes protected spray Needless say bottle remaining contents went shop trash can important results could have far worse bottle split below liquid level line has never happened before would seem indicate problem could strike again Per haps should warn customers see can obtain bottles formulated material less likely split squeezed previous Safety column published account similar incident modeler listening sound bottle breathing ended up ear full CyA glue dont remember whether result bottle rupturing cap coming off Considering number bottles CyA glue must sold year together fact Ive two letters subject rupturing bottles dont view serious problem However think should aware could happen Other potential health hazards recently re Continued page 22 87 Cool JN4 Jenny $3Yjjb$ Moogoto Bb $42 $4 Fobbe 87 Fl $39 108 DH MooqoBonb $55 70 Boylee GeoBee $32 98 Steo FTt 7Koydet $56 nd Pete Rote $32 99 NBIk Widoon P61 $69 6O Snpennnonine S68 $24 71 Soog DC-3 C47 $35 Sopennnonine 568 $35 95 Song DC3 C47 $55 Henl 96$ $42 06 Hoeoko0eoeool2 $32 94 Cot Henok P6E $54t 64 Stoot SkyCo $18 74 DoeIiOleoG-B 11 $48 72Co02111/4 t&S $46 95 Menoooope Spol $36 108 Con 0201/4 L&5 $36 $5 Hell Spn Bolldog $43- 60 Dooglot M-2 Molt $24 107 Aenonto C-S Opt $35 68 Betlol BoIldog FIn 030 ed Rooc Ike $40- 09 BoonRoe MOtA $54 7$ Oo,neo WW Ron $35 107 Onno Beonol P89 $54 Ink Ft IC $42 69 [jedbogo NX21 1 $28 h Fl iC $54 91 tindbegt NX21 1 $29 0001 Ron $24 96 WoNWiNon Ron $48 62 HooeMnMolligo, $35 74 C Ploildon S$2C4 $55 *94 Hoon 09 Molligo, $45150 FoiotnPT19 T $5963 Boeing F26A Fl $3660 Woco TopenWing $36 4 Boeing P26A Ftn $4890 Wono TopeWing 848 C6 Cobb $3675 Woolld tyonodon $32 *64 RecoIn C170 Slog $38105 WoolId Lnoonde $49 9 ceon C170 Slog 049 51Fon4 0101 4AT $36 55 tool 11 Eleolo$3076 Fond Tninntn 4AT $48 02 took 11 Eleenno$40114 Fo4 Tninln 4AT $65 62 Slinooo 71W SR7$1896 Bellonee Alnonoio $40 81 Snbnoon 71W 08782693 boning C2AnpIn $69 122 Stinoon 71W SR7 83858 Gnon J3p Dock $39 59 $nitol PIn P28 $20 78 Onon 129 $ook $56 110 BnioloI Pt P2-B 845124 took Al Fopeoe $48 74Tonnono Peono $4562IokA Enpeto $24 56 Con WorIl P40 $24 03 took Fop eoo $26 ogI Corool F4U $35 77W Wono 121 RedI $48 00 VogI Cononin P40$6962 C Seohonok F7C1 845 l 78 took tigintog P30$3894 C Seohoonk P7C1 $07 56 OopSooBee An$24108 5ko 030 AnpI $49 748 74 RopSeoBee An$3960 Bee no 100 Spo 1836 70 Pipe 13 Cob$2990 Roe ng 150 Spo $49~ 156 Pipe 53 Cob $3972 No hop Gonoo $40 90 Lonk Rodoon BonIn$3896 No op Goono 875 63 Onon F6F Helloot$28POSt no loon 3 M $56 77$oeiogRl7GFonl$256OStno 2 M$42 103 Roe 817G P018221205 noA ton3 M$82 60 WeolI WInnInind$3278 Con o Co PRISA $42 60 N Anne Noobon$39104 Con Co POY 5A $56 Oononen Vyol$3965 M Cl no Cl ope 865 77 toononbe Sedon$2597 09 Ch no Cl opo 72 NA 825 $OoIoe 849 62 Co too NC 4$59 * 65 l4ldooode 826 $49 94 Co too NC 4$69 tie teetootos 00*3000 tOO CANT RON 8 Sold Tbo Deoleno Pioeoooln 00 0 oInonge~lYn Ono 1400 94oe SOt Op 6124 Fo Alnooyo lno Add 10% oIl odeo fon otoipp 00$ no eo o Con & ldeo Eloenokene ito 15% 25 Fioloniol notolog $200 linolode Pnlne boll Pone teotion oboe $1 SO bn 01, foeon odd $100 LE VELAND MODEL & SUPPLY Co , te 0000 000, 000000 tO00t3000tAtOO 0 EOt tIONOOINOE Ott OnCOOI,00000000 10307$ DETROIT AVE CLEVEtANO OHIO 44102 on,OooooooOtonono hone toO 12PM 850 IOn 8Sll12161 9613400 OWO0OCtOOOO000 CLEVELAND GIANTS FOR GIANT SCALE BUFFS ,cludes HY-lA MOTOR B-52 FUGHT BATTERY TWO PROPS CHARGE PLUG CONNECTORS ACCESSORY PKG w/extra screws 20 Model Aviation 7 L TM POSI-CURE CYANOACRYLATE • LA viI 1 1 Es] SPECIAL INTRODUCTORY OFFER List Sale 1 oz Fast Cure 3-5 Sec $249 Savings 500/a Off 2 oz Fast Cure 3-5 Sec895$396 56% Off 1 oz Gap-Filling 5 Sec 2 oz Gap-Filling 5 Sec895$396 OUR GUARANTEE TO YOU satisfied POSI-CURE please return unused portion within 30 days full refundNo questions asked SHELDONS HOBBY SHOP 2135 Old Oakland Rd Jose CA 95131 FOR ORDERS ONLY PLEASEVISK 800 228-3237 822-1688 Out StateIn California $395 SHIPPING INFO 408 9430872per order Hours Mon-Wed Fri & Sat 930-530 FAST SERVICE Thur 930-900 1200-500 COD ADD $190 500/o Off 56% Off [DCO SKY D[VIL 65 Igmrion Approxed 90 Day Warraiity Twin Ball Bearing Crank Americas finest old-timer engine Originally designed Hassad & Havlik replica engine resonic tuning ensures continuous flow power through speed range Look out green goodbye red headT&Ds replica Sky Devil 65 $279 less coil cond & plug Calif residents add 6% sales tax ORDER DIRECT T&D RESEARCH AssocIAms 6371 El Cajon Blvd Suite 115 San Diego CA 92115 $1 FOR BROCHURE ceived copy publication DuPont Company titled Managing Safely sent Anthony Cantarella Western Region manager Safety Services DuPont also happens RC modeler publi cation article titled Hobbies Can Hurt contained some tips feel worth passing entire article follows People enjoy arts crafts home may realize materials use can cause health problems example lead used glazes can haled build up body cause nausea constipation various aches pains Sol vents lik used spray paint permanent markers rubber cement epoxy glues can cause headaches dizziness eye irritation dermatitis Exposure other substances may take years before people begin suffer ill effects industrial workers may exposed toxins often supplied protective equipment andwork controlled environ ments itiay true homes some same hazardous materials used minimize risks arts crafts take precautions Make sure work space has adequate ventilation need some kind system remove contaminated air supply fresh airmore simply opening window Dont eat drink smoke work area reduce chances accidentally ng hazardous materials break meals make habit wash hands carefully time leave project Wear proper protective equipment Depend ing what materials processes work Continued page 136 TRIM KNIFE Trim Knife designed precisely edge trim excess cover ing material model Can used outside soges straight curved Blade can set 1/16 1/4 simple adjustment screw Trim Knife will make perfect overlap butt seams Works covering materials 6 blades Trim Knife Set includes 6 blades $900 Trim Knits Blades 5 per pack $300 No Notches Straight cuts Heavy duty extra sharp no notch blade Same size 55 regular blades tip does flex cutting strip ping theker materials Great big birds Big Bird Blades box 100 blades$950 Trial size oackaoe 20 blades$250 22 Model Aviation NOR THEA ST AEROD YNAMICS 61C LEBANON STREET ORD ME 04073 490-1881 TRAIN-AIR 20 TRAIN-AIR 40 SPORT-AIR 40 BEL-AIR 40 AO U See local dealer call us referral BEL-AIR 60 Safety Preston Continued page 22 wear gloves dust masks safety gog gles special clothing respirators Learn about chemicals materials what precautions should taken working Study warning labels have questions contact manu facturer ask safety data sheets can replace hazardous materials safer ones Store materials original containers keep covered Keep work area clean Wipe up flammable liquid spills immediately put soaked rags tightly-covered trash container Dispose chemicals properly have World famous kits Europe Large magnificent replicas over 4 feet long beautiful walnut mahogany planking fittings details exquisitely cast bronze brass rare hardwoods Large scale plans step-bystep instructions materials included VHS Video tapecassette howto build also available Send 64-pg full-color catalog $100 MODEL EXPO INC Dept MA-77S 23 Just Road Fairfield NJ 07007 Please send full color ship model catalog $100 enclosed Name questions about disposal contact local health fire department Dont work flammable materials near ignition source such open flame heater water heater cigarette suffer asthma emphysema aller gies heart condition check doctor about materials processes work pregnant ask doctor about continuing hobby also applies wives male hobbyists JP Space out sessions hobby give body time recover between pos sible exposures Ive previously mentioned number above DuPont safety tips dont think can hurt repeat continue see new comers enter hobby may aware some hazards associated products use Before leaving subject potentially haz ardous chemicals want mention two have seemingly similar names have very different properties methyl ethyl ketone MEK methyl ethyl ketone peroxide MEKP MEK solvent commonly used join styrene plastic products Chemically closely related ace tone addition being another common modeling solvent may well principal gredient wifes girlfriends nail polish remover recent letter claimed writer told never allow MEK come contact ones skin since readily ab sorbed ones system will stay until die letter-writer also stated told MEK will cause permanent blind ness upon contact eyeball latter statement leads believe confusing MEK MEKP Methyl ethyl ketone peroxide MEKP clear liquid hardener accompanies polyester resin strong oxidizer extreme care should taken avoid getting drop ones eye Such mishap could well result permanent eye damage blindness would rather get drop methyl ethyl ketone MEK eye does present anywhere near same hazard eyes does MEKP eyes immediately flushed water upon contact MEK no lasting damage should result Similarly am aware MEK presents hazard due skin contact Cyanoacrylate CyA glues have also con fused MEKP some letter-writers writers believed mere drop CyA eye would result instant blindness drop CyA glue eye may well cause eyelids become stuck together likely will very uncomfortable its likely will result permanent damage However would urge take precautions against getting anything eye days ever find time would like list various chemicals use hobby together associated hazards handling precautions Meanwhile urge take care John Preston 2812 Northampton St N W Washington DC 20015 Low Voltage/Marron Continued page 34 /I6 Make sure kill switch off position check controls working properly right direction Since plane light glides well its easy trim out standing top small hill firmly throwing power nose level slightly down wind Make whatever adjustments necessary before attempting powered flight Top Flite nylon 6 x 4 prop installed turn kill switch check proper control surface movement start motor Launch model good shove nose down prevent stall let fly straight level until picks up speed Start feeding some up elevator remembering small electric motor doesnt have much power snarling glow engine Low Voltage has gained some height heart starts beating nor mally again put through some maneuvers get feel control responses Make mental notes adjustments may needed After about 4 5 min will hear whine motor noticeably decrease pitch model wont climb Its time shut off mjttor prepare landing ailerons effective down stall speed experienced landing planes landing gear will pleasantly surprised ease accomplished responding advertisers mention read about ModelAviation 136 Model Aviation city State_____________________ Zip
Edition: Model Aviation - 1987/07
Page Numbers: 14, 16, 18, 20, 22, 136
___John Preston___________________________ Safety Comes First Big models/little models have kinetic energy flight can pose danger people property Sum mary hobby health hazards BIG MODELS April 1987 issue Model Aviation column outlined two plans submitted AMA VP suggested way models weighing current maximum 55 lb see Official AMA Safety Code General paragraph 5 might safely flown nutshell plans either Remove 55-lb weight limit entirely allow models weight flown pro vided meet certain safety criteria 2 Keep current 55-lb weight limit establish spe cial Experimental category would have weight limit would again require mod els category meet certain safety criteria asked comments readers merits two plans Response overwhelming received enough letters convince Plan No remove 55-lb weight limit entirely favored Respondents cited number reasons did favor Plan No Generally felt weight limit heavy models would built flown would conform safety criteria favored Plan No 2 stated mod elers desiring build heavy model Ex perimental category should have bear extra insurance cost themselves impose such burden majority AMA membership have no desire build such large models seems fair may possible now essentially self-insured organi zation As AMA President Don Lowe pointed Out segment Big Models column AMA News May 1987 issue bottom line must fly safely whether fly big ones little ones current self-insurance program total assets AMA line Before leaving subject model weight limits Id like pass some comments letter subject Bill Kincheloe Magalia CA Bill favored Plan Continued page 16 14 Model Aviation CANT SPEAJ Fo czuv 541 WHArS ThE 6I D8AL ABOUT MOIEL WEtdMT column provided S address lieu 9 corner reeardlug safely aipacis 9 model evleilen acSIvIUes Content 9 SI. column however SI. opIulon 9th auth audi. uS necessarily represent official position 95k Academy 9 Model Aeronauties / 10 Bill Kinchelos sent Interesting chart Theres Information column including what meant lethal threshold Read heedi tLI Lets enjoy outdoors ort ~' Little World Comfort Hot Burning Summer Days Convenient Size Portable Shade Thats Guick Set up Change Instantly Give Protection Front Weathert Size 72 n 120 60 sq ft Add units double triple etc size PortaShade available Add 05 Units can used trailer awnings patio covers etc PortaShade convenient size has no center pole useable space can straddle picnic table model airplane small vehicle canopy strong heat retlecting waterproot material white top side unique tear proof corner tittings no grommets stands almost 7 tall strong 1 aluminum poles can stand work play under comtort wind resistant ed 40 MPH PortaShade very taut easy install beach picnic mountains anywhere want protection trom elements Set up very quick person can about 5 minutes can adjusted easily tilt against sun can set up vertically us windbreak Master CardVisaMoney OrdersChecks Dealer Inquiries Invited 4M Co Dept M 814 N Shawnee Dewey OK 74029 P hone 918-534-2244 Sportsman Model/PFR4-60 Economy Model/EPFR4-60 $3995 PS $3295 PS No 2but condition enforceable rules can drafted concerning pilots creden tials verification models airworthiness Bill engineer before retired worked designer weapon systems ordnance devices Enclosed letter graphical plot kinetic energy models weighing 15 10 50 lb respect velocity previous discussions model weight limits column Ive talked about kinetic energy should perhaps concern us just model weight However Bill has cluded some additional information plot thought might interest readers quoting letter Ill let Bill explain term Lethal Threshold plot new piece information PO BOX 3076 OAK RIDGE TENNESSEE 37830 Tel 615482-6188 experience may available want argue safety point Lethal Threshold t-lb line Now no longer used military once criterion weapon judged calculated results thousands wounds recorded during Civil War World War World War II Korea being energy dissipated vulnerable area human being has 70% chance killing person enjoy statistics probabilities probability modified multiplying probability missile question hits vulnerable area So can say prob ability lethal accident low because prob ability being hit low Im prepared estimate low acceptable Im sure underwriters wont accept very large number like 10% what see chart equal potential harm seven-to-one velocity increment 50-to-one weight change isnt surprising since seven squared 49 calculations led seven rounded What important whatever lethal threshold accept heavier model has sig nificantly greater potential harm smaller have agree Bill heavier model its potential harm However others have pointed out large models tend fly slower small ones therefore give bystanders time get out way event loss control pilot other words probability being struck large model despite its extra frontal area may less being struck small fast model real reason elected reproduce Bills graph show no matter what sizes Continued page 18 16 Model Aviation liti 74. r ROUSH KITS TaylorCraft Full apan 108 Ante 1670 Clipped 84 Area 1300 Power 75 no 12 cu Baleaft Ply 10l2lba $9996 Super Sport 120 Span 73 Area 960 Power 75 12 cii $9996 Super Kwik FII Span 70 Area 927 Power 75 12 Cu *8996 Coming Soon Two new enervdav scale airplanes 80 AT-6 78 P51 75-120 engines Both $9996 Jr Sticks Span fl Area 1080 Power 75 12 Cu $6995 Direct Sales Only Prices Include Shipping Send $100 Catalog ROUSH MFG 1726 Dywood St IE L Cast. Ohio 44707 21k 4644610 EXTRA 230 SPAN 76 AREA 900 sq POWER 4 stroke 120 ALL BALSA ARF KIT Features pre-assembled wood fuselage veneered plug-in wings stab er epoxy cowl Lexan canopy l UIC / details other Zimbabwe Model Products kits call write Full color deluxe catalog -$100 Manua u e uRep esen es& mpnrters n Fne can Pruducts -ZIMPRO MARKETING Authorized Warranty ServiceFREQUENCY CONVERSION $1000 Discount Regular Repair Moat Makes Models Converted Tuning Done Spectrum Analyzer K-LINE Also Service LIZi AU Futaba~5had Only Full Time Servicenter Midwest 117 East Main St Northvil le Michigan 48167 er Le~elJ e 1 -313-348-0085 Cyanoacrylate glue Two recent letters men tioned unpleasant experiences writers using CyA glue Neither resulted serious injury illness making aware what happened hope can save some griefand perhaps some bucks first Dave Powers Gastonia NC reason am writing pertains fact wear contact lenses bard lenses What has got sport Well fine until began use CyA glue building models Invariably some glue residue dries fingertips using debonder does get bit glue off Thus lend up scratching contacts cleaning fingers before putting dont plan give up using glue plan using latex fingertips available drug store Just thought would pass information along other lenswearers alert careful results can get expensive Although vision such have wear glasses have never invested contact lenses So Im speculating say seems residue fingers other glues aliphatic resin balsa cement may also cause scratches during contact-lens-wiping operations second letter came Hank Nystrom Johnson City TN also wears glasses credits preventing eye injury Hank following say about incident letter sent manufacturer glue usingContinued page 20 IORE LESS NOISE four-cycle measuring up expectations read Make engine before Make 60 120 four-stroke less means 1 Quieter glow 2 More mellow sounding four-cycle 3 More usable power both 4 Highest power-to-weight ratio 5 The lowest idle ever 6 Increase mileage up 4 times 7 Runs cooler glow 8 No glowplugs fail 9 Increased reliability 10 Fuel available concentrate Conversion kits available 049 30 cid Schnuerle ported engines Its sim ple just change heads fuel What waiting Dust off two-cycle DIESELIZE Send self-addressed stamped enve lope $100 information call 203-877-1670 between 730 pm 930 pm EST Mon-Fri DAVIS DIESEL DEVELOPMENT PO Box 141 Milford CT 06460 The leader quiet combustion technology since 1976 18 Model Aviation model like fly likely have Carry Largest Only StockLethal Threshold exceeds 57 ft-lb So Kraft Parts WorldKraft IsDon Lowe stated May column must oil fly safely alive working KRAFT MIDWEST recently incident using product feel need made aware two-ounce bottle glue developed annoying tendency clog up tip Because gotten habit squeezing bottle see breathing through tip before tipping bottle over workpiece time bottle ruptured halfway around circumference about midway between top bottom Note vertical seam let go split around diameter bottle pop CyA glue went everywhere Fortuntely wearing reading glasses eyes protected spray Needless say bottle remaining contents went shop trash can important results could have far worse bottle split below liquid level line has never happened before would seem indicate problem could strike again Per haps should warn customers see can obtain bottles formulated material less likely split squeezed previous Safety column published account similar incident modeler listening sound bottle breathing ended up ear full CyA glue dont remember whether result bottle rupturing cap coming off Considering number bottles CyA glue must sold year together fact Ive two letters subject rupturing bottles dont view serious problem However think should aware could happen Other potential health hazards recently re Continued page 22 87 Cool JN4 Jenny $3Yjjb$ Moogoto Bb $42 $4 Fobbe 87 Fl $39 108 DH MooqoBonb $55 70 Boylee GeoBee $32 98 Steo FTt 7Koydet $56 nd Pete Rote $32 99 NBIk Widoon P61 $69 6O Snpennnonine S68 $24 71 Soog DC-3 C47 $35 Sopennnonine 568 $35 95 Song DC3 C47 $55 Henl 96$ $42 06 Hoeoko0eoeool2 $32 94 Cot Henok P6E $54t 64 Stoot SkyCo $18 74 DoeIiOleoG-B 11 $48 72Co02111/4 t&S $46 95 Menoooope Spol $36 108 Con 0201/4 L&5 $36 $5 Hell Spn Bolldog $43- 60 Dooglot M-2 Molt $24 107 Aenonto C-S Opt $35 68 Betlol BoIldog FIn 030 ed Rooc Ike $40- 09 BoonRoe MOtA $54 7$ Oo,neo WW Ron $35 107 Onno Beonol P89 $54 Ink Ft IC $42 69 [jedbogo NX21 1 $28 h Fl iC $54 91 tindbegt NX21 1 $29 0001 Ron $24 96 WoNWiNon Ron $48 62 HooeMnMolligo, $35 74 C Ploildon S$2C4 $55 *94 Hoon 09 Molligo, $45150 FoiotnPT19 T $5963 Boeing F26A Fl $3660 Woco TopenWing $36 4 Boeing P26A Ftn $4890 Wono TopeWing 848 C6 Cobb $3675 Woolld tyonodon $32 *64 RecoIn C170 Slog $38105 WoolId Lnoonde $49 9 ceon C170 Slog 049 51Fon4 0101 4AT $36 55 tool 11 Eleolo$3076 Fond Tninntn 4AT $48 02 took 11 Eleenno$40114 Fo4 Tninln 4AT $65 62 Slinooo 71W SR7$1896 Bellonee Alnonoio $40 81 Snbnoon 71W 08782693 boning C2AnpIn $69 122 Stinoon 71W SR7 83858 Gnon J3p Dock $39 59 $nitol PIn P28 $20 78 Onon 129 $ook $56 110 BnioloI Pt P2-B 845124 took Al Fopeoe $48 74Tonnono Peono $4562IokA Enpeto $24 56 Con WorIl P40 $24 03 took Fop eoo $26 ogI Corool F4U $35 77W Wono 121 RedI $48 00 VogI Cononin P40$6962 C Seohonok F7C1 845 l 78 took tigintog P30$3894 C Seohoonk P7C1 $07 56 OopSooBee An$24108 5ko 030 AnpI $49 748 74 RopSeoBee An$3960 Bee no 100 Spo 1836 70 Pipe 13 Cob$2990 Roe ng 150 Spo $49~ 156 Pipe 53 Cob $3972 No hop Gonoo $40 90 Lonk Rodoon BonIn$3896 No op Goono 875 63 Onon F6F Helloot$28POSt no loon 3 M $56 77$oeiogRl7GFonl$256OStno 2 M$42 103 Roe 817G P018221205 noA ton3 M$82 60 WeolI WInnInind$3278 Con o Co PRISA $42 60 N Anne Noobon$39104 Con Co POY 5A $56 Oononen Vyol$3965 M Cl no Cl ope 865 77 toononbe Sedon$2597 09 Ch no Cl opo 72 NA 825 $OoIoe 849 62 Co too NC 4$59 * 65 l4ldooode 826 $49 94 Co too NC 4$69 tie teetootos 00*3000 tOO CANT RON 8 Sold Tbo Deoleno Pioeoooln 00 0 oInonge~lYn Ono 1400 94oe SOt Op 6124 Fo Alnooyo lno Add 10% oIl odeo fon otoipp 00$ no eo o Con & ldeo Eloenokene ito 15% 25 Fioloniol notolog $200 linolode Pnlne boll Pone teotion oboe $1 SO bn 01, foeon odd $100 LE VELAND MODEL & SUPPLY Co , te 0000 000, 000000 tO00t3000tAtOO 0 EOt tIONOOINOE Ott OnCOOI,00000000 10307$ DETROIT AVE CLEVEtANO OHIO 44102 on,OooooooOtonono hone toO 12PM 850 IOn 8Sll12161 9613400 OWO0OCtOOOO000 CLEVELAND GIANTS FOR GIANT SCALE BUFFS ,cludes HY-lA MOTOR B-52 FUGHT BATTERY TWO PROPS CHARGE PLUG CONNECTORS ACCESSORY PKG w/extra screws 20 Model Aviation 7 L TM POSI-CURE CYANOACRYLATE • LA viI 1 1 Es] SPECIAL INTRODUCTORY OFFER List Sale 1 oz Fast Cure 3-5 Sec $249 Savings 500/a Off 2 oz Fast Cure 3-5 Sec895$396 56% Off 1 oz Gap-Filling 5 Sec 2 oz Gap-Filling 5 Sec895$396 OUR GUARANTEE TO YOU satisfied POSI-CURE please return unused portion within 30 days full refundNo questions asked SHELDONS HOBBY SHOP 2135 Old Oakland Rd Jose CA 95131 FOR ORDERS ONLY PLEASEVISK 800 228-3237 822-1688 Out StateIn California $395 SHIPPING INFO 408 9430872per order Hours Mon-Wed Fri & Sat 930-530 FAST SERVICE Thur 930-900 1200-500 COD ADD $190 500/o Off 56% Off [DCO SKY D[VIL 65 Igmrion Approxed 90 Day Warraiity Twin Ball Bearing Crank Americas finest old-timer engine Originally designed Hassad & Havlik replica engine resonic tuning ensures continuous flow power through speed range Look out green goodbye red headT&Ds replica Sky Devil 65 $279 less coil cond & plug Calif residents add 6% sales tax ORDER DIRECT T&D RESEARCH AssocIAms 6371 El Cajon Blvd Suite 115 San Diego CA 92115 $1 FOR BROCHURE ceived copy publication DuPont Company titled Managing Safely sent Anthony Cantarella Western Region manager Safety Services DuPont also happens RC modeler publi cation article titled Hobbies Can Hurt contained some tips feel worth passing entire article follows People enjoy arts crafts home may realize materials use can cause health problems example lead used glazes can haled build up body cause nausea constipation various aches pains Sol vents lik used spray paint permanent markers rubber cement epoxy glues can cause headaches dizziness eye irritation dermatitis Exposure other substances may take years before people begin suffer ill effects industrial workers may exposed toxins often supplied protective equipment andwork controlled environ ments itiay true homes some same hazardous materials used minimize risks arts crafts take precautions Make sure work space has adequate ventilation need some kind system remove contaminated air supply fresh airmore simply opening window Dont eat drink smoke work area reduce chances accidentally ng hazardous materials break meals make habit wash hands carefully time leave project Wear proper protective equipment Depend ing what materials processes work Continued page 136 TRIM KNIFE Trim Knife designed precisely edge trim excess cover ing material model Can used outside soges straight curved Blade can set 1/16 1/4 simple adjustment screw Trim Knife will make perfect overlap butt seams Works covering materials 6 blades Trim Knife Set includes 6 blades $900 Trim Knits Blades 5 per pack $300 No Notches Straight cuts Heavy duty extra sharp no notch blade Same size 55 regular blades tip does flex cutting strip ping theker materials Great big birds Big Bird Blades box 100 blades$950 Trial size oackaoe 20 blades$250 22 Model Aviation NOR THEA ST AEROD YNAMICS 61C LEBANON STREET ORD ME 04073 490-1881 TRAIN-AIR 20 TRAIN-AIR 40 SPORT-AIR 40 BEL-AIR 40 AO U See local dealer call us referral BEL-AIR 60 Safety Preston Continued page 22 wear gloves dust masks safety gog gles special clothing respirators Learn about chemicals materials what precautions should taken working Study warning labels have questions contact manu facturer ask safety data sheets can replace hazardous materials safer ones Store materials original containers keep covered Keep work area clean Wipe up flammable liquid spills immediately put soaked rags tightly-covered trash container Dispose chemicals properly have World famous kits Europe Large magnificent replicas over 4 feet long beautiful walnut mahogany planking fittings details exquisitely cast bronze brass rare hardwoods Large scale plans step-bystep instructions materials included VHS Video tapecassette howto build also available Send 64-pg full-color catalog $100 MODEL EXPO INC Dept MA-77S 23 Just Road Fairfield NJ 07007 Please send full color ship model catalog $100 enclosed Name questions about disposal contact local health fire department Dont work flammable materials near ignition source such open flame heater water heater cigarette suffer asthma emphysema aller gies heart condition check doctor about materials processes work pregnant ask doctor about continuing hobby also applies wives male hobbyists JP Space out sessions hobby give body time recover between pos sible exposures Ive previously mentioned number above DuPont safety tips dont think can hurt repeat continue see new comers enter hobby may aware some hazards associated products use Before leaving subject potentially haz ardous chemicals want mention two have seemingly similar names have very different properties methyl ethyl ketone MEK methyl ethyl ketone peroxide MEKP MEK solvent commonly used join styrene plastic products Chemically closely related ace tone addition being another common modeling solvent may well principal gredient wifes girlfriends nail polish remover recent letter claimed writer told never allow MEK come contact ones skin since readily ab sorbed ones system will stay until die letter-writer also stated told MEK will cause permanent blind ness upon contact eyeball latter statement leads believe confusing MEK MEKP Methyl ethyl ketone peroxide MEKP clear liquid hardener accompanies polyester resin strong oxidizer extreme care should taken avoid getting drop ones eye Such mishap could well result permanent eye damage blindness would rather get drop methyl ethyl ketone MEK eye does present anywhere near same hazard eyes does MEKP eyes immediately flushed water upon contact MEK no lasting damage should result Similarly am aware MEK presents hazard due skin contact Cyanoacrylate CyA glues have also con fused MEKP some letter-writers writers believed mere drop CyA eye would result instant blindness drop CyA glue eye may well cause eyelids become stuck together likely will very uncomfortable its likely will result permanent damage However would urge take precautions against getting anything eye days ever find time would like list various chemicals use hobby together associated hazards handling precautions Meanwhile urge take care John Preston 2812 Northampton St N W Washington DC 20015 Low Voltage/Marron Continued page 34 /I6 Make sure kill switch off position check controls working properly right direction Since plane light glides well its easy trim out standing top small hill firmly throwing power nose level slightly down wind Make whatever adjustments necessary before attempting powered flight Top Flite nylon 6 x 4 prop installed turn kill switch check proper control surface movement start motor Launch model good shove nose down prevent stall let fly straight level until picks up speed Start feeding some up elevator remembering small electric motor doesnt have much power snarling glow engine Low Voltage has gained some height heart starts beating nor mally again put through some maneuvers get feel control responses Make mental notes adjustments may needed After about 4 5 min will hear whine motor noticeably decrease pitch model wont climb Its time shut off mjttor prepare landing ailerons effective down stall speed experienced landing planes landing gear will pleasantly surprised ease accomplished responding advertisers mention read about ModelAviation 136 Model Aviation city State_____________________ Zip
Edition: Model Aviation - 1987/07
Page Numbers: 14, 16, 18, 20, 22, 136
___John Preston___________________________ Safety Comes First Big models/little models have kinetic energy flight can pose danger people property Sum mary hobby health hazards BIG MODELS April 1987 issue Model Aviation column outlined two plans submitted AMA VP suggested way models weighing current maximum 55 lb see Official AMA Safety Code General paragraph 5 might safely flown nutshell plans either Remove 55-lb weight limit entirely allow models weight flown pro vided meet certain safety criteria 2 Keep current 55-lb weight limit establish spe cial Experimental category would have weight limit would again require mod els category meet certain safety criteria asked comments readers merits two plans Response overwhelming received enough letters convince Plan No remove 55-lb weight limit entirely favored Respondents cited number reasons did favor Plan No Generally felt weight limit heavy models would built flown would conform safety criteria favored Plan No 2 stated mod elers desiring build heavy model Ex perimental category should have bear extra insurance cost themselves impose such burden majority AMA membership have no desire build such large models seems fair may possible now essentially self-insured organi zation As AMA President Don Lowe pointed Out segment Big Models column AMA News May 1987 issue bottom line must fly safely whether fly big ones little ones current self-insurance program total assets AMA line Before leaving subject model weight limits Id like pass some comments letter subject Bill Kincheloe Magalia CA Bill favored Plan Continued page 16 14 Model Aviation CANT SPEAJ Fo czuv 541 WHArS ThE 6I D8AL ABOUT MOIEL WEtdMT column provided S address lieu 9 corner reeardlug safely aipacis 9 model evleilen acSIvIUes Content 9 SI. column however SI. opIulon 9th auth audi. uS necessarily represent official position 95k Academy 9 Model Aeronauties / 10 Bill Kinchelos sent Interesting chart Theres Information column including what meant lethal threshold Read heedi tLI Lets enjoy outdoors ort ~' Little World Comfort Hot Burning Summer Days Convenient Size Portable Shade Thats Guick Set up Change Instantly Give Protection Front Weathert Size 72 n 120 60 sq ft Add units double triple etc size PortaShade available Add 05 Units can used trailer awnings patio covers etc PortaShade convenient size has no center pole useable space can straddle picnic table model airplane small vehicle canopy strong heat retlecting waterproot material white top side unique tear proof corner tittings no grommets stands almost 7 tall strong 1 aluminum poles can stand work play under comtort wind resistant ed 40 MPH PortaShade very taut easy install beach picnic mountains anywhere want protection trom elements Set up very quick person can about 5 minutes can adjusted easily tilt against sun can set up vertically us windbreak Master CardVisaMoney OrdersChecks Dealer Inquiries Invited 4M Co Dept M 814 N Shawnee Dewey OK 74029 P hone 918-534-2244 Sportsman Model/PFR4-60 Economy Model/EPFR4-60 $3995 PS $3295 PS No 2but condition enforceable rules can drafted concerning pilots creden tials verification models airworthiness Bill engineer before retired worked designer weapon systems ordnance devices Enclosed letter graphical plot kinetic energy models weighing 15 10 50 lb respect velocity previous discussions model weight limits column Ive talked about kinetic energy should perhaps concern us just model weight However Bill has cluded some additional information plot thought might interest readers quoting letter Ill let Bill explain term Lethal Threshold plot new piece information PO BOX 3076 OAK RIDGE TENNESSEE 37830 Tel 615482-6188 experience may available want argue safety point Lethal Threshold t-lb line Now no longer used military once criterion weapon judged calculated results thousands wounds recorded during Civil War World War World War II Korea being energy dissipated vulnerable area human being has 70% chance killing person enjoy statistics probabilities probability modified multiplying probability missile question hits vulnerable area So can say prob ability lethal accident low because prob ability being hit low Im prepared estimate low acceptable Im sure underwriters wont accept very large number like 10% what see chart equal potential harm seven-to-one velocity increment 50-to-one weight change isnt surprising since seven squared 49 calculations led seven rounded What important whatever lethal threshold accept heavier model has sig nificantly greater potential harm smaller have agree Bill heavier model its potential harm However others have pointed out large models tend fly slower small ones therefore give bystanders time get out way event loss control pilot other words probability being struck large model despite its extra frontal area may less being struck small fast model real reason elected reproduce Bills graph show no matter what sizes Continued page 18 16 Model Aviation liti 74. r ROUSH KITS TaylorCraft Full apan 108 Ante 1670 Clipped 84 Area 1300 Power 75 no 12 cu Baleaft Ply 10l2lba $9996 Super Sport 120 Span 73 Area 960 Power 75 12 cii $9996 Super Kwik FII Span 70 Area 927 Power 75 12 Cu *8996 Coming Soon Two new enervdav scale airplanes 80 AT-6 78 P51 75-120 engines Both $9996 Jr Sticks Span fl Area 1080 Power 75 12 Cu $6995 Direct Sales Only Prices Include Shipping Send $100 Catalog ROUSH MFG 1726 Dywood St IE L Cast. Ohio 44707 21k 4644610 EXTRA 230 SPAN 76 AREA 900 sq POWER 4 stroke 120 ALL BALSA ARF KIT Features pre-assembled wood fuselage veneered plug-in wings stab er epoxy cowl Lexan canopy l UIC / details other Zimbabwe Model Products kits call write Full color deluxe catalog -$100 Manua u e uRep esen es& mpnrters n Fne can Pruducts -ZIMPRO MARKETING Authorized Warranty ServiceFREQUENCY CONVERSION $1000 Discount Regular Repair Moat Makes Models Converted Tuning Done Spectrum Analyzer K-LINE Also Service LIZi AU Futaba~5had Only Full Time Servicenter Midwest 117 East Main St Northvil le Michigan 48167 er Le~elJ e 1 -313-348-0085 Cyanoacrylate glue Two recent letters men tioned unpleasant experiences writers using CyA glue Neither resulted serious injury illness making aware what happened hope can save some griefand perhaps some bucks first Dave Powers Gastonia NC reason am writing pertains fact wear contact lenses bard lenses What has got sport Well fine until began use CyA glue building models Invariably some glue residue dries fingertips using debonder does get bit glue off Thus lend up scratching contacts cleaning fingers before putting dont plan give up using glue plan using latex fingertips available drug store Just thought would pass information along other lenswearers alert careful results can get expensive Although vision such have wear glasses have never invested contact lenses So Im speculating say seems residue fingers other glues aliphatic resin balsa cement may also cause scratches during contact-lens-wiping operations second letter came Hank Nystrom Johnson City TN also wears glasses credits preventing eye injury Hank following say about incident letter sent manufacturer glue usingContinued page 20 IORE LESS NOISE four-cycle measuring up expectations read Make engine before Make 60 120 four-stroke less means 1 Quieter glow 2 More mellow sounding four-cycle 3 More usable power both 4 Highest power-to-weight ratio 5 The lowest idle ever 6 Increase mileage up 4 times 7 Runs cooler glow 8 No glowplugs fail 9 Increased reliability 10 Fuel available concentrate Conversion kits available 049 30 cid Schnuerle ported engines Its sim ple just change heads fuel What waiting Dust off two-cycle DIESELIZE Send self-addressed stamped enve lope $100 information call 203-877-1670 between 730 pm 930 pm EST Mon-Fri DAVIS DIESEL DEVELOPMENT PO Box 141 Milford CT 06460 The leader quiet combustion technology since 1976 18 Model Aviation model like fly likely have Carry Largest Only StockLethal Threshold exceeds 57 ft-lb So Kraft Parts WorldKraft IsDon Lowe stated May column must oil fly safely alive working KRAFT MIDWEST recently incident using product feel need made aware two-ounce bottle glue developed annoying tendency clog up tip Because gotten habit squeezing bottle see breathing through tip before tipping bottle over workpiece time bottle ruptured halfway around circumference about midway between top bottom Note vertical seam let go split around diameter bottle pop CyA glue went everywhere Fortuntely wearing reading glasses eyes protected spray Needless say bottle remaining contents went shop trash can important results could have far worse bottle split below liquid level line has never happened before would seem indicate problem could strike again Per haps should warn customers see can obtain bottles formulated material less likely split squeezed previous Safety column published account similar incident modeler listening sound bottle breathing ended up ear full CyA glue dont remember whether result bottle rupturing cap coming off Considering number bottles CyA glue must sold year together fact Ive two letters subject rupturing bottles dont view serious problem However think should aware could happen Other potential health hazards recently re Continued page 22 87 Cool JN4 Jenny $3Yjjb$ Moogoto Bb $42 $4 Fobbe 87 Fl $39 108 DH MooqoBonb $55 70 Boylee GeoBee $32 98 Steo FTt 7Koydet $56 nd Pete Rote $32 99 NBIk Widoon P61 $69 6O Snpennnonine S68 $24 71 Soog DC-3 C47 $35 Sopennnonine 568 $35 95 Song DC3 C47 $55 Henl 96$ $42 06 Hoeoko0eoeool2 $32 94 Cot Henok P6E $54t 64 Stoot SkyCo $18 74 DoeIiOleoG-B 11 $48 72Co02111/4 t&S $46 95 Menoooope Spol $36 108 Con 0201/4 L&5 $36 $5 Hell Spn Bolldog $43- 60 Dooglot M-2 Molt $24 107 Aenonto C-S Opt $35 68 Betlol BoIldog FIn 030 ed Rooc Ike $40- 09 BoonRoe MOtA $54 7$ Oo,neo WW Ron $35 107 Onno Beonol P89 $54 Ink Ft IC $42 69 [jedbogo NX21 1 $28 h Fl iC $54 91 tindbegt NX21 1 $29 0001 Ron $24 96 WoNWiNon Ron $48 62 HooeMnMolligo, $35 74 C Ploildon S$2C4 $55 *94 Hoon 09 Molligo, $45150 FoiotnPT19 T $5963 Boeing F26A Fl $3660 Woco TopenWing $36 4 Boeing P26A Ftn $4890 Wono TopeWing 848 C6 Cobb $3675 Woolld tyonodon $32 *64 RecoIn C170 Slog $38105 WoolId Lnoonde $49 9 ceon C170 Slog 049 51Fon4 0101 4AT $36 55 tool 11 Eleolo$3076 Fond Tninntn 4AT $48 02 took 11 Eleenno$40114 Fo4 Tninln 4AT $65 62 Slinooo 71W SR7$1896 Bellonee Alnonoio $40 81 Snbnoon 71W 08782693 boning C2AnpIn $69 122 Stinoon 71W SR7 83858 Gnon J3p Dock $39 59 $nitol PIn P28 $20 78 Onon 129 $ook $56 110 BnioloI Pt P2-B 845124 took Al Fopeoe $48 74Tonnono Peono $4562IokA Enpeto $24 56 Con WorIl P40 $24 03 took Fop eoo $26 ogI Corool F4U $35 77W Wono 121 RedI $48 00 VogI Cononin P40$6962 C Seohonok F7C1 845 l 78 took tigintog P30$3894 C Seohoonk P7C1 $07 56 OopSooBee An$24108 5ko 030 AnpI $49 748 74 RopSeoBee An$3960 Bee no 100 Spo 1836 70 Pipe 13 Cob$2990 Roe ng 150 Spo $49~ 156 Pipe 53 Cob $3972 No hop Gonoo $40 90 Lonk Rodoon BonIn$3896 No op Goono 875 63 Onon F6F Helloot$28POSt no loon 3 M $56 77$oeiogRl7GFonl$256OStno 2 M$42 103 Roe 817G P018221205 noA ton3 M$82 60 WeolI WInnInind$3278 Con o Co PRISA $42 60 N Anne Noobon$39104 Con Co POY 5A $56 Oononen Vyol$3965 M Cl no Cl ope 865 77 toononbe Sedon$2597 09 Ch no Cl opo 72 NA 825 $OoIoe 849 62 Co too NC 4$59 * 65 l4ldooode 826 $49 94 Co too NC 4$69 tie teetootos 00*3000 tOO CANT RON 8 Sold Tbo Deoleno Pioeoooln 00 0 oInonge~lYn Ono 1400 94oe SOt Op 6124 Fo Alnooyo lno Add 10% oIl odeo fon otoipp 00$ no eo o Con & ldeo Eloenokene ito 15% 25 Fioloniol notolog $200 linolode Pnlne boll Pone teotion oboe $1 SO bn 01, foeon odd $100 LE VELAND MODEL & SUPPLY Co , te 0000 000, 000000 tO00t3000tAtOO 0 EOt tIONOOINOE Ott OnCOOI,00000000 10307$ DETROIT AVE CLEVEtANO OHIO 44102 on,OooooooOtonono hone toO 12PM 850 IOn 8Sll12161 9613400 OWO0OCtOOOO000 CLEVELAND GIANTS FOR GIANT SCALE BUFFS ,cludes HY-lA MOTOR B-52 FUGHT BATTERY TWO PROPS CHARGE PLUG CONNECTORS ACCESSORY PKG w/extra screws 20 Model Aviation 7 L TM POSI-CURE CYANOACRYLATE • LA viI 1 1 Es] SPECIAL INTRODUCTORY OFFER List Sale 1 oz Fast Cure 3-5 Sec $249 Savings 500/a Off 2 oz Fast Cure 3-5 Sec895$396 56% Off 1 oz Gap-Filling 5 Sec 2 oz Gap-Filling 5 Sec895$396 OUR GUARANTEE TO YOU satisfied POSI-CURE please return unused portion within 30 days full refundNo questions asked SHELDONS HOBBY SHOP 2135 Old Oakland Rd Jose CA 95131 FOR ORDERS ONLY PLEASEVISK 800 228-3237 822-1688 Out StateIn California $395 SHIPPING INFO 408 9430872per order Hours Mon-Wed Fri & Sat 930-530 FAST SERVICE Thur 930-900 1200-500 COD ADD $190 500/o Off 56% Off [DCO SKY D[VIL 65 Igmrion Approxed 90 Day Warraiity Twin Ball Bearing Crank Americas finest old-timer engine Originally designed Hassad & Havlik replica engine resonic tuning ensures continuous flow power through speed range Look out green goodbye red headT&Ds replica Sky Devil 65 $279 less coil cond & plug Calif residents add 6% sales tax ORDER DIRECT T&D RESEARCH AssocIAms 6371 El Cajon Blvd Suite 115 San Diego CA 92115 $1 FOR BROCHURE ceived copy publication DuPont Company titled Managing Safely sent Anthony Cantarella Western Region manager Safety Services DuPont also happens RC modeler publi cation article titled Hobbies Can Hurt contained some tips feel worth passing entire article follows People enjoy arts crafts home may realize materials use can cause health problems example lead used glazes can haled build up body cause nausea constipation various aches pains Sol vents lik used spray paint permanent markers rubber cement epoxy glues can cause headaches dizziness eye irritation dermatitis Exposure other substances may take years before people begin suffer ill effects industrial workers may exposed toxins often supplied protective equipment andwork controlled environ ments itiay true homes some same hazardous materials used minimize risks arts crafts take precautions Make sure work space has adequate ventilation need some kind system remove contaminated air supply fresh airmore simply opening window Dont eat drink smoke work area reduce chances accidentally ng hazardous materials break meals make habit wash hands carefully time leave project Wear proper protective equipment Depend ing what materials processes work Continued page 136 TRIM KNIFE Trim Knife designed precisely edge trim excess cover ing material model Can used outside soges straight curved Blade can set 1/16 1/4 simple adjustment screw Trim Knife will make perfect overlap butt seams Works covering materials 6 blades Trim Knife Set includes 6 blades $900 Trim Knits Blades 5 per pack $300 No Notches Straight cuts Heavy duty extra sharp no notch blade Same size 55 regular blades tip does flex cutting strip ping theker materials Great big birds Big Bird Blades box 100 blades$950 Trial size oackaoe 20 blades$250 22 Model Aviation NOR THEA ST AEROD YNAMICS 61C LEBANON STREET ORD ME 04073 490-1881 TRAIN-AIR 20 TRAIN-AIR 40 SPORT-AIR 40 BEL-AIR 40 AO U See local dealer call us referral BEL-AIR 60 Safety Preston Continued page 22 wear gloves dust masks safety gog gles special clothing respirators Learn about chemicals materials what precautions should taken working Study warning labels have questions contact manu facturer ask safety data sheets can replace hazardous materials safer ones Store materials original containers keep covered Keep work area clean Wipe up flammable liquid spills immediately put soaked rags tightly-covered trash container Dispose chemicals properly have World famous kits Europe Large magnificent replicas over 4 feet long beautiful walnut mahogany planking fittings details exquisitely cast bronze brass rare hardwoods Large scale plans step-bystep instructions materials included VHS Video tapecassette howto build also available Send 64-pg full-color catalog $100 MODEL EXPO INC Dept MA-77S 23 Just Road Fairfield NJ 07007 Please send full color ship model catalog $100 enclosed Name questions about disposal contact local health fire department Dont work flammable materials near ignition source such open flame heater water heater cigarette suffer asthma emphysema aller gies heart condition check doctor about materials processes work pregnant ask doctor about continuing hobby also applies wives male hobbyists JP Space out sessions hobby give body time recover between pos sible exposures Ive previously mentioned number above DuPont safety tips dont think can hurt repeat continue see new comers enter hobby may aware some hazards associated products use Before leaving subject potentially haz ardous chemicals want mention two have seemingly similar names have very different properties methyl ethyl ketone MEK methyl ethyl ketone peroxide MEKP MEK solvent commonly used join styrene plastic products Chemically closely related ace tone addition being another common modeling solvent may well principal gredient wifes girlfriends nail polish remover recent letter claimed writer told never allow MEK come contact ones skin since readily ab sorbed ones system will stay until die letter-writer also stated told MEK will cause permanent blind ness upon contact eyeball latter statement leads believe confusing MEK MEKP Methyl ethyl ketone peroxide MEKP clear liquid hardener accompanies polyester resin strong oxidizer extreme care should taken avoid getting drop ones eye Such mishap could well result permanent eye damage blindness would rather get drop methyl ethyl ketone MEK eye does present anywhere near same hazard eyes does MEKP eyes immediately flushed water upon contact MEK no lasting damage should result Similarly am aware MEK presents hazard due skin contact Cyanoacrylate CyA glues have also con fused MEKP some letter-writers writers believed mere drop CyA eye would result instant blindness drop CyA glue eye may well cause eyelids become stuck together likely will very uncomfortable its likely will result permanent damage However would urge take precautions against getting anything eye days ever find time would like list various chemicals use hobby together associated hazards handling precautions Meanwhile urge take care John Preston 2812 Northampton St N W Washington DC 20015 Low Voltage/Marron Continued page 34 /I6 Make sure kill switch off position check controls working properly right direction Since plane light glides well its easy trim out standing top small hill firmly throwing power nose level slightly down wind Make whatever adjustments necessary before attempting powered flight Top Flite nylon 6 x 4 prop installed turn kill switch check proper control surface movement start motor Launch model good shove nose down prevent stall let fly straight level until picks up speed Start feeding some up elevator remembering small electric motor doesnt have much power snarling glow engine Low Voltage has gained some height heart starts beating nor mally again put through some maneuvers get feel control responses Make mental notes adjustments may needed After about 4 5 min will hear whine motor noticeably decrease pitch model wont climb Its time shut off mjttor prepare landing ailerons effective down stall speed experienced landing planes landing gear will pleasantly surprised ease accomplished responding advertisers mention read about ModelAviation 136 Model Aviation city State_____________________ Zip