-U Now theres easier way fashion replacement foam wings homemade foamcutter inexpensive make simple use ECarI Dunaway CUTTING FOAM wing part model airplane matter can lot easier think Theres no need buy foam-cutting kit expensive power supply such Variac transformer Heres innovative way will save some money As do-it-yourself method takes little patience halfway steady hand items youll need complete home foam-cutting workshop listed later article costliest piece equipment simple 12-volt battery charger What follows basic how-to presentation no technical jargon relative newcomers hobby should have no difficulties understanding cut foam wings first place youve ever destroyed beautiful wing balsa-and-ply masterpiece know answer After dumping pieces badly mangled wing garage floor go find plans figure out what need rebuild model put call friendly hobby shop time youve hung up know have bigger problem youd thought Ready-cut pieces such ribs lx found hobby shop other balsa supliers shopkeeper may try convince purchase wing kit made model may suggest buy some balsa stock start rebuilding Beginners take note Ualess ribs same shape least gives fighting chance time usually against you start rebuilding As promised such confusing terminology wing root airfoil etc banished article decide rebuild now face decision can trace out shape ribs carefully hand cut individually balsa sheet 66 Model Aviation brackets cutting wire mounted 40-in length 1 x 3-in pine stock arranged shown bolts secure brackets firmly eliminate movement cutting wire attached brackets insulated paper clip wire loop alligator clip connects wire power supply means eight foot length 16-gauge lamp cord Once its attached cutting wire lamp cord positioned out way taped wont interfere cutting An insulated spring used attach cutting wire opposite bracket keeps tension wire heats up Again lamp cord secured out way Left Getting ready cut wing blank block bead foam held place cuffing board nails templates plywood case secured pins eliminate movement toothpicks extending front rear foam used guide cutting wire foam Right single pass cutting wire reveals contour top wing patience spar notch can cut clean straight Once other foam blank has cut wing ready light sanding finishing have band saw can sandwich sheets between two tracings using templates cut ribs once templates should made material thats harder balsa band saw blade can guided around Band sawing much better way Its quicker hand cutting produces identical ribs Hand-cut ribs will need sanded matching contour Lets assume chose rebuild havent mentioned frustration youre going feel youve glued ribs leading edge piece find spar notches dont line up rebuilding wing seems like too much trouble using wing kitassuming available modelmay seem like too much money Tower Hobbies catalog example wing kits some Goldberg Great Planes models range $1750 $3895 modelers would rather cut ribs hand pay price An easier alternative course cut own wings out foam Making foam-cutting bow easy minimum hand tools required Ive found 1 x 3-in pine has enough strength stand up tension will undergo Its also easiest materials work Since trainers have wingspans no six feet strongly recommend keeping cutting capability wire maximum three feet Cut 40-in length 1 x 3-in pine stockeither No 2 clear use No 2 pine costs about 30 cents foot compared about 85 cents clear pine savings like dont mind seeing few knots along board Obtain two standard metal shelf brackets l0-to-12-inch size about $150 hardware stores Drill three A-in holes broad end bracket shown photo holes will accept wood screws nuts bolts attach brackets end wood Drill -in hole end bracket accommodate hanging setup cutting wire Mount first bracket end bow measure about 38 locate mount other bracket sure face brackets inward toward other shown Once both brackets firmly mounted wrap individually electrical tape Run tape bracket fastens wood way bottom local hardware store carries rolls electrical tape about 79 cents apiece desired can wrap entire bracket before mounting brackets mounted taped facing inward youre ready hang wire number suitable wire types choose youre concerned about keeping cost down consider using piece welding wire stainless steel fishing leader nickel chromium wire Welding wire type used Mig welders excellent choice start Go mechanic auto body shop ask piece about four feet long Im sure theyll oblige Welding wire can also ordered through almost discount tool catalogs welder supply houses through Sears sure wire 023 should also copper-jacketed steel Unlike softer steel wire copper-jacketed type wont sag heated Dont use galvanized wire Stainless steel fishing leader may used sure wire solid wire braided Since leader usually marked pounds ie 40-poundtest tell salesperson need diameter 020 025 small spoolmuch youll useaverages about $195 Finally have access nickel chromium wire dont mind expense means use Its good wire cutting foambut no better inexpensive cutter making Thread small paper clip through A-in hole bottom brackets will used attachment point cutting wire As alternative paper clip can cut piece heavier-gauge solid wire loop through hole paper clip wire loop must insulated cutting wire attachment point Electrical tape works fine Ive also used piece insulation stripped 18-gauge wire no problems Attach small reasonably strong spring other %-in hole Insulate end wire will connected Springs Continued page 105 July1991 67 Up Around/Aldrich Continued page 93 lately concerned care ball bearings used engines commented last time about use Rislone after run and/or storage lube Lest think after run lube important well-known manufacturer once commented 31 oil made him lots money Another thing remember manufacturers can afford put highest quality high-performance bearings engines ultimate cost consumer would prohibitive few relate lot bearing problems failure use Castor oil fuel Bert Striegler lead engineer Conoco now retired spent over $300000 prove least 3% Castor oil needed fuels addition chemical engineer friend related laboratory tests show synthetics used today produce acids attack metal burned comments directed toward longer engine life once ran fuel 10% Castrol MSSR synthetic lube 88% pure nitro 2% propylene oxide during speed meet perfectly willing sacrifice engine go fast Let desire guide Id like compile listing suppliers products CL FF including specialty items engines such mufflers Anyone would like included should send price list catalog sheet list complete can sending SASE may recall Doug Spreng didnt fly much CL Stunt after 1952 Instead became engrossed Radio Control design developed something think call feedback servo tell its used RC units today Foam/Du naway Continued page 67 can obtained quite inexpensively hardware stores main idea strength length Look spring good tension its too long can always cut down Examine cutting wire bends kinks before attaching between two brackets way accomplishing place end wire vise hold other end hand sight down its length Pull gently wire check bends Bend wire fingers remove Attach wire paper clip wire loop twisting few times security Stretch spring using pliers possible attach secure cutting wire its end Measure wire should 30 36 inches long thats maximum cut youll able work wire firmly attached between two insulated positions run length erAfter Muffler Experts Evuat.. Don Lowe RCM set-up has shown 6 dE drop very little RPM loss Brian Lee BIC Reportjeers None.it never cracked split melted came loose anything just hung ate noise Howard Crispin Sound Model Aeronautics dropped almost 6 db.the engine wIll turn few hundred RPM more.Oulte impressive Now Two Sizes $j995 up 49 size List $2405KDI 50 tosize10426 SE 206th P1 ListKent WA 98031 Postage ead headliag Free 450 PM256 5545053 Checls cc Mosey Ordees OSJLY July 1991 105 Super Light weight Construction Made USA No Advanced Modeling Skills Necessary Build Accepts X-Cell Kalt Hirobo GMP & Schiuter Kit includes Bodys Clear Canopy Landing Gear Flesable Tail Drive Unit Wood ~eBluePrint some E NTURY Pilotatation Machine ______________________________________ Shocks AH-1S TOW COBRA 36995 AH-64 APACHE 38995 OH-lB HUEY 27995 UH-60A BLACK HAWK 36995 WESTLAND SEAKING 34995 NEW AIRWOLE w/Retracts . 28995 759 E BROKAW RD SAN JOSE CA 95112 TEL & FAX 408 4361 325] WORLD CLASS RIC HELICOPTERS & ACCESSORIES IMPORT & EXPORT SUNBIRD SENSATION WITH STYLE Sunbird combines eye opening performance truly distinctive styling terrific flying design Whether choose 40 size Sunbird 10 Sunbird Jr youll find Sunbird perfect sport plane %fl PRECISION PRODUCTS INC 714 592-5144 510 E Arrow Highway San Dimas CA 91773 Available dealer Made America American Technology RJL K 61 Features include Single Ring Forged Piston Investment Cast Crankcase Schnuerle Porting Double Bail Bearings Forged Rod Bushed Both Ends Machined Latest Computer Controlled Equipment HP VT2J & VT49 Four Cycle Made Austria PJL hwbwoles Features Include Double Bell Bearings ABC Overhead Rotary Valves supported roller bearings Forged Rod Bushed both ends Ringed ABC Piston/Cylinder true chrome HP Gold Cup 61 ABC Also Available 20 40 Sizes 61 Hell ringed 40 & 61 rear intake Marine versions Features Include Schnuerle Porting Double Bail Bearings Slide Valve Carburetor Forged Rod ed both ends ABC Piston/Cylinder true chrome Vintage Forster Glow & Ignition very low production engine produced America Sold factory direct Glow $9500Ignition $73500 choice of29 36 Add $300 S&ll- CA Residents add tax 4-6 week delivery FACTORY PARTS & SERVICE FOR HB ENGINES- RJL ENGINES- HP ENGINES KRAFT 61 Cox CONQUEST 15 TAIPAN 40 HGK ENGINES FORSTER ENGINES MCCOY SERIES 21 BLACK HEAD FINNED CASEI CALL OR WRfl FOR IEEE 1NFORMA77ON RJL INDUSTRIES USA PO BoxS SIERRA M&iRR CA 91025 TELEPHONE 818 359-0016 AT LAST An Effect ye H gh Tech Engine Cleaner R/C Engines Removes Burned-On Fuel Residue Encrusted Carbon anteed ONLY $895 Add $200 S & H CA rus add 725% tax Clean Engines-Run Cooler-Last Longer Send Check Money OrderTo AIRBORNE HOBBIES 3764 30TH ST SAN DIEGO CA 92104 619543-9703 18-gauge wire connect bow power supply Commonly referred lamp cord 18-gauge wire available hardware stores about 10 cents foot length wire entirely up power supply will within arms reach work eight-foot length lamp cord will Strip insulation off end cord Attach alligator clip stripped end Connect clip cutting wire shown photo run lamp cord up bracket across entire length bow Tape wire down point bracket across bow keep lamp cord out way during cutting Strip clip another length lamp cord attach cutting wire thats connected spring Attach alligator clips other ends lamp cord connectors power supply power supply merely battery charger use Sears model 934503050 Called 10/2/50-amp charger comes ammeter sells about $40 Any other type battery charger happen have around house should work just well An ammeter seems essential operation Should hook up wrong type wire future experiments meter will show youre drawing too amps excess amps create excess heat causing wire burn foam cuts usually resulting uneven cutting connecting system set charger two amps cutting cutting wires draw between two four amps Connecting bow power supply simple Lay bow down make sure cutting wire isnt touching anything connect lead positive clamp battery charger other negative clamp whatever necessary ensure charger clamps dont contact other use bow Turn charger pick up bow Position small scrap bead foam Dwl Sd Nose Gear a45 Fults Tooling PO Box 95 Champaign IL 61824 255 Eot Ashland/PO Sos 727/Soda Spriogs Idaho 83276 next cutting wire just second two cutting wire will hot enough cut foamand burn fingers Make habit keeping fingers away wire Making templates Now know foam-cutter works next step make templates actually cut out wing bead foam use comes sheets different sizes use 2in-thick stock thats cut 2 x 3-ft pieces Prices vary considerably area country another Insulating bead foam will also work can choose other varieties Nows time experiment Im convinced almost anything can used template Before choosing material however ask yourself two questions Will template reused must cuts want reusable template will cut evenly use material wont distorted ruined use Formica metal templates will last indefinitely Once youve made templates notched wing spars youll need attach prong some sort end guide cutting wire foam use round toothpicks gluing about half length extends beyond template ends Cutting foam recommend using 106 Model Aviation IO25SqAah I416IbFIyinoWoioh~GIo.Fa&CowI -.,-,,oSodac.AIoaLodngGaa CIaOCanopyAaiIobIa Sadie l~ S255Sheaad Ki S365~DeIe Shaead Kd $495 DEALERS INQUIRES WELCOME Electric F ight LIghtweight 12 OLuaauey back Adjustable swItchIng poIntrasstee hookup $2995 ON/OFF Controller Power save weight Vaiy high efficIency auly eeev baa at2OA51ze2Zot3x63 AddSlAl8foeshippiag Califoaio rexidoxo dd 725% $217 Tee Saud Check Sr Inoney order Ia comeoais,/jHigh Sky Fatahaeaaaeetar3929 Kansas St #9 aStor ooooacon S aba availableSan DlegoCA 92104 Satisfaction Guaranteed cutting board Its much easier cut piece thats secured nails board thats simply lying workbench scrap piece plywood will Pound several nails through board ready use Position templates end piece foam cut Attach firmly using same kind pin used building model Position foam cutting board pushing down its snug Mold bow lay cutting wire across prongs gently slide foam Allow wire move through foam its own applying enough pressure keep moving Cutting out spar notches takes patience Dont attempt force wire through foam allow melt through seat itself Forcing wire guarantees poor results suggest start trailing edge work forward thats comfortable however theres nothing wrong doing other way around Cut out top bottom wing turn foam over cut out other side Set wing aside together scrap cut cases youll need cut second foam blank other wing half Set up templates another piece foam repeat entire process Give foam light sanding finishing replacement wing ready Foam-cutting easy way well worth learning can use technique cutting other model parts too wish thank fellow Californians Paul Ross Lakeside Doug Wilsman Ramona making number helpful suggesttons Please contact questions need information offered Ill glad provide ask enclose SASE Write 310 N Hunter St Ramona CA 92065 D High-Lift/Lennon Continued page 103 would have accelerate around 35 mph would have lower rate climb flaps rugged may lowered partially fully point models flight Turning maneuvers loops very tight flaps down Harrier has flown repeatedly windy conditions flaps down nose up engine throttled back model hovers little ground speed yet remains under good control Fellow fliers surprised doesnt stall fall off spin powered OS Max 40 FSR engine turning 10 x 6 propeller best ways keep cool S maintain control ROBART HINGE POINTS Simply best hinging system available application Drill hole add drop glue Hinge Point youre hinged DON TBEA ROBART CONTROL HORNS accurate on-center control linkage No need bent kinked control lines use horns built-in rotating ball link Reach other fine ROBART products hobby deaters nattonwide ROBART MFG POBOX 1247 STCHARLES IL 60174 708-584-7616 July 1991 107 TSIG1 SH71O Pkg 0124 $295 EA~ HINE_ THE HIGH-TECH HINGE DESIGNED FOR THE CYANOACRYLATE AGE Easier install other hinge No gouging picking messy epoxies Simply cut single knife slot hinge slide hinges place apply few drops favorite CA glue youre done SUPER FAST SUPER EASY SUPER STRONG SIG MFG CO INC.401-7 So Front St.Montezuma IA 50171 23-5154 ROBART HINGE POINTS AND CONTROL HORNS.
Edition: Model Aviation - 1991/07
Page Numbers: 66, 67, 105, 106, 107
Edition: Model Aviation - 1991/07
Page Numbers: 66, 67, 105, 106, 107
-U Now theres easier way fashion replacement foam wings homemade foamcutter inexpensive make simple use ECarI Dunaway CUTTING FOAM wing part model airplane matter can lot easier think Theres no need buy foam-cutting kit expensive power supply such Variac transformer Heres innovative way will save some money As do-it-yourself method takes little patience halfway steady hand items youll need complete home foam-cutting workshop listed later article costliest piece equipment simple 12-volt battery charger What follows basic how-to presentation no technical jargon relative newcomers hobby should have no difficulties understanding cut foam wings first place youve ever destroyed beautiful wing balsa-and-ply masterpiece know answer After dumping pieces badly mangled wing garage floor go find plans figure out what need rebuild model put call friendly hobby shop time youve hung up know have bigger problem youd thought Ready-cut pieces such ribs lx found hobby shop other balsa supliers shopkeeper may try convince purchase wing kit made model may suggest buy some balsa stock start rebuilding Beginners take note Ualess ribs same shape least gives fighting chance time usually against you start rebuilding As promised such confusing terminology wing root airfoil etc banished article decide rebuild now face decision can trace out shape ribs carefully hand cut individually balsa sheet 66 Model Aviation brackets cutting wire mounted 40-in length 1 x 3-in pine stock arranged shown bolts secure brackets firmly eliminate movement cutting wire attached brackets insulated paper clip wire loop alligator clip connects wire power supply means eight foot length 16-gauge lamp cord Once its attached cutting wire lamp cord positioned out way taped wont interfere cutting An insulated spring used attach cutting wire opposite bracket keeps tension wire heats up Again lamp cord secured out way Left Getting ready cut wing blank block bead foam held place cuffing board nails templates plywood case secured pins eliminate movement toothpicks extending front rear foam used guide cutting wire foam Right single pass cutting wire reveals contour top wing patience spar notch can cut clean straight Once other foam blank has cut wing ready light sanding finishing have band saw can sandwich sheets between two tracings using templates cut ribs once templates should made material thats harder balsa band saw blade can guided around Band sawing much better way Its quicker hand cutting produces identical ribs Hand-cut ribs will need sanded matching contour Lets assume chose rebuild havent mentioned frustration youre going feel youve glued ribs leading edge piece find spar notches dont line up rebuilding wing seems like too much trouble using wing kitassuming available modelmay seem like too much money Tower Hobbies catalog example wing kits some Goldberg Great Planes models range $1750 $3895 modelers would rather cut ribs hand pay price An easier alternative course cut own wings out foam Making foam-cutting bow easy minimum hand tools required Ive found 1 x 3-in pine has enough strength stand up tension will undergo Its also easiest materials work Since trainers have wingspans no six feet strongly recommend keeping cutting capability wire maximum three feet Cut 40-in length 1 x 3-in pine stockeither No 2 clear use No 2 pine costs about 30 cents foot compared about 85 cents clear pine savings like dont mind seeing few knots along board Obtain two standard metal shelf brackets l0-to-12-inch size about $150 hardware stores Drill three A-in holes broad end bracket shown photo holes will accept wood screws nuts bolts attach brackets end wood Drill -in hole end bracket accommodate hanging setup cutting wire Mount first bracket end bow measure about 38 locate mount other bracket sure face brackets inward toward other shown Once both brackets firmly mounted wrap individually electrical tape Run tape bracket fastens wood way bottom local hardware store carries rolls electrical tape about 79 cents apiece desired can wrap entire bracket before mounting brackets mounted taped facing inward youre ready hang wire number suitable wire types choose youre concerned about keeping cost down consider using piece welding wire stainless steel fishing leader nickel chromium wire Welding wire type used Mig welders excellent choice start Go mechanic auto body shop ask piece about four feet long Im sure theyll oblige Welding wire can also ordered through almost discount tool catalogs welder supply houses through Sears sure wire 023 should also copper-jacketed steel Unlike softer steel wire copper-jacketed type wont sag heated Dont use galvanized wire Stainless steel fishing leader may used sure wire solid wire braided Since leader usually marked pounds ie 40-poundtest tell salesperson need diameter 020 025 small spoolmuch youll useaverages about $195 Finally have access nickel chromium wire dont mind expense means use Its good wire cutting foambut no better inexpensive cutter making Thread small paper clip through A-in hole bottom brackets will used attachment point cutting wire As alternative paper clip can cut piece heavier-gauge solid wire loop through hole paper clip wire loop must insulated cutting wire attachment point Electrical tape works fine Ive also used piece insulation stripped 18-gauge wire no problems Attach small reasonably strong spring other %-in hole Insulate end wire will connected Springs Continued page 105 July1991 67 Up Around/Aldrich Continued page 93 lately concerned care ball bearings used engines commented last time about use Rislone after run and/or storage lube Lest think after run lube important well-known manufacturer once commented 31 oil made him lots money Another thing remember manufacturers can afford put highest quality high-performance bearings engines ultimate cost consumer would prohibitive few relate lot bearing problems failure use Castor oil fuel Bert Striegler lead engineer Conoco now retired spent over $300000 prove least 3% Castor oil needed fuels addition chemical engineer friend related laboratory tests show synthetics used today produce acids attack metal burned comments directed toward longer engine life once ran fuel 10% Castrol MSSR synthetic lube 88% pure nitro 2% propylene oxide during speed meet perfectly willing sacrifice engine go fast Let desire guide Id like compile listing suppliers products CL FF including specialty items engines such mufflers Anyone would like included should send price list catalog sheet list complete can sending SASE may recall Doug Spreng didnt fly much CL Stunt after 1952 Instead became engrossed Radio Control design developed something think call feedback servo tell its used RC units today Foam/Du naway Continued page 67 can obtained quite inexpensively hardware stores main idea strength length Look spring good tension its too long can always cut down Examine cutting wire bends kinks before attaching between two brackets way accomplishing place end wire vise hold other end hand sight down its length Pull gently wire check bends Bend wire fingers remove Attach wire paper clip wire loop twisting few times security Stretch spring using pliers possible attach secure cutting wire its end Measure wire should 30 36 inches long thats maximum cut youll able work wire firmly attached between two insulated positions run length erAfter Muffler Experts Evuat.. Don Lowe RCM set-up has shown 6 dE drop very little RPM loss Brian Lee BIC Reportjeers None.it never cracked split melted came loose anything just hung ate noise Howard Crispin Sound Model Aeronautics dropped almost 6 db.the engine wIll turn few hundred RPM more.Oulte impressive Now Two Sizes $j995 up 49 size List $2405KDI 50 tosize10426 SE 206th P1 ListKent WA 98031 Postage ead headliag Free 450 PM256 5545053 Checls cc Mosey Ordees OSJLY July 1991 105 Super Light weight Construction Made USA No Advanced Modeling Skills Necessary Build Accepts X-Cell Kalt Hirobo GMP & Schiuter Kit includes Bodys Clear Canopy Landing Gear Flesable Tail Drive Unit Wood ~eBluePrint some E NTURY Pilotatation Machine ______________________________________ Shocks AH-1S TOW COBRA 36995 AH-64 APACHE 38995 OH-lB HUEY 27995 UH-60A BLACK HAWK 36995 WESTLAND SEAKING 34995 NEW AIRWOLE w/Retracts . 28995 759 E BROKAW RD SAN JOSE CA 95112 TEL & FAX 408 4361 325] WORLD CLASS RIC HELICOPTERS & ACCESSORIES IMPORT & EXPORT SUNBIRD SENSATION WITH STYLE Sunbird combines eye opening performance truly distinctive styling terrific flying design Whether choose 40 size Sunbird 10 Sunbird Jr youll find Sunbird perfect sport plane %fl PRECISION PRODUCTS INC 714 592-5144 510 E Arrow Highway San Dimas CA 91773 Available dealer Made America American Technology RJL K 61 Features include Single Ring Forged Piston Investment Cast Crankcase Schnuerle Porting Double Bail Bearings Forged Rod Bushed Both Ends Machined Latest Computer Controlled Equipment HP VT2J & VT49 Four Cycle Made Austria PJL hwbwoles Features Include Double Bell Bearings ABC Overhead Rotary Valves supported roller bearings Forged Rod Bushed both ends Ringed ABC Piston/Cylinder true chrome HP Gold Cup 61 ABC Also Available 20 40 Sizes 61 Hell ringed 40 & 61 rear intake Marine versions Features Include Schnuerle Porting Double Bail Bearings Slide Valve Carburetor Forged Rod ed both ends ABC Piston/Cylinder true chrome Vintage Forster Glow & Ignition very low production engine produced America Sold factory direct Glow $9500Ignition $73500 choice of29 36 Add $300 S&ll- CA Residents add tax 4-6 week delivery FACTORY PARTS & SERVICE FOR HB ENGINES- RJL ENGINES- HP ENGINES KRAFT 61 Cox CONQUEST 15 TAIPAN 40 HGK ENGINES FORSTER ENGINES MCCOY SERIES 21 BLACK HEAD FINNED CASEI CALL OR WRfl FOR IEEE 1NFORMA77ON RJL INDUSTRIES USA PO BoxS SIERRA M&iRR CA 91025 TELEPHONE 818 359-0016 AT LAST An Effect ye H gh Tech Engine Cleaner R/C Engines Removes Burned-On Fuel Residue Encrusted Carbon anteed ONLY $895 Add $200 S & H CA rus add 725% tax Clean Engines-Run Cooler-Last Longer Send Check Money OrderTo AIRBORNE HOBBIES 3764 30TH ST SAN DIEGO CA 92104 619543-9703 18-gauge wire connect bow power supply Commonly referred lamp cord 18-gauge wire available hardware stores about 10 cents foot length wire entirely up power supply will within arms reach work eight-foot length lamp cord will Strip insulation off end cord Attach alligator clip stripped end Connect clip cutting wire shown photo run lamp cord up bracket across entire length bow Tape wire down point bracket across bow keep lamp cord out way during cutting Strip clip another length lamp cord attach cutting wire thats connected spring Attach alligator clips other ends lamp cord connectors power supply power supply merely battery charger use Sears model 934503050 Called 10/2/50-amp charger comes ammeter sells about $40 Any other type battery charger happen have around house should work just well An ammeter seems essential operation Should hook up wrong type wire future experiments meter will show youre drawing too amps excess amps create excess heat causing wire burn foam cuts usually resulting uneven cutting connecting system set charger two amps cutting cutting wires draw between two four amps Connecting bow power supply simple Lay bow down make sure cutting wire isnt touching anything connect lead positive clamp battery charger other negative clamp whatever necessary ensure charger clamps dont contact other use bow Turn charger pick up bow Position small scrap bead foam Dwl Sd Nose Gear a45 Fults Tooling PO Box 95 Champaign IL 61824 255 Eot Ashland/PO Sos 727/Soda Spriogs Idaho 83276 next cutting wire just second two cutting wire will hot enough cut foamand burn fingers Make habit keeping fingers away wire Making templates Now know foam-cutter works next step make templates actually cut out wing bead foam use comes sheets different sizes use 2in-thick stock thats cut 2 x 3-ft pieces Prices vary considerably area country another Insulating bead foam will also work can choose other varieties Nows time experiment Im convinced almost anything can used template Before choosing material however ask yourself two questions Will template reused must cuts want reusable template will cut evenly use material wont distorted ruined use Formica metal templates will last indefinitely Once youve made templates notched wing spars youll need attach prong some sort end guide cutting wire foam use round toothpicks gluing about half length extends beyond template ends Cutting foam recommend using 106 Model Aviation IO25SqAah I416IbFIyinoWoioh~GIo.Fa&CowI -.,-,,oSodac.AIoaLodngGaa CIaOCanopyAaiIobIa Sadie l~ S255Sheaad Ki S365~DeIe Shaead Kd $495 DEALERS INQUIRES WELCOME Electric F ight LIghtweight 12 OLuaauey back Adjustable swItchIng poIntrasstee hookup $2995 ON/OFF Controller Power save weight Vaiy high efficIency auly eeev baa at2OA51ze2Zot3x63 AddSlAl8foeshippiag Califoaio rexidoxo dd 725% $217 Tee Saud Check Sr Inoney order Ia comeoais,/jHigh Sky Fatahaeaaaeetar3929 Kansas St #9 aStor ooooacon S aba availableSan DlegoCA 92104 Satisfaction Guaranteed cutting board Its much easier cut piece thats secured nails board thats simply lying workbench scrap piece plywood will Pound several nails through board ready use Position templates end piece foam cut Attach firmly using same kind pin used building model Position foam cutting board pushing down its snug Mold bow lay cutting wire across prongs gently slide foam Allow wire move through foam its own applying enough pressure keep moving Cutting out spar notches takes patience Dont attempt force wire through foam allow melt through seat itself Forcing wire guarantees poor results suggest start trailing edge work forward thats comfortable however theres nothing wrong doing other way around Cut out top bottom wing turn foam over cut out other side Set wing aside together scrap cut cases youll need cut second foam blank other wing half Set up templates another piece foam repeat entire process Give foam light sanding finishing replacement wing ready Foam-cutting easy way well worth learning can use technique cutting other model parts too wish thank fellow Californians Paul Ross Lakeside Doug Wilsman Ramona making number helpful suggesttons Please contact questions need information offered Ill glad provide ask enclose SASE Write 310 N Hunter St Ramona CA 92065 D High-Lift/Lennon Continued page 103 would have accelerate around 35 mph would have lower rate climb flaps rugged may lowered partially fully point models flight Turning maneuvers loops very tight flaps down Harrier has flown repeatedly windy conditions flaps down nose up engine throttled back model hovers little ground speed yet remains under good control Fellow fliers surprised doesnt stall fall off spin powered OS Max 40 FSR engine turning 10 x 6 propeller best ways keep cool S maintain control ROBART HINGE POINTS Simply best hinging system available application Drill hole add drop glue Hinge Point youre hinged DON TBEA ROBART CONTROL HORNS accurate on-center control linkage No need bent kinked control lines use horns built-in rotating ball link Reach other fine ROBART products hobby deaters nattonwide ROBART MFG POBOX 1247 STCHARLES IL 60174 708-584-7616 July 1991 107 TSIG1 SH71O Pkg 0124 $295 EA~ HINE_ THE HIGH-TECH HINGE DESIGNED FOR THE CYANOACRYLATE AGE Easier install other hinge No gouging picking messy epoxies Simply cut single knife slot hinge slide hinges place apply few drops favorite CA glue youre done SUPER FAST SUPER EASY SUPER STRONG SIG MFG CO INC.401-7 So Front St.Montezuma IA 50171 23-5154 ROBART HINGE POINTS AND CONTROL HORNS.
Edition: Model Aviation - 1991/07
Page Numbers: 66, 67, 105, 106, 107
-U Now theres easier way fashion replacement foam wings homemade foamcutter inexpensive make simple use ECarI Dunaway CUTTING FOAM wing part model airplane matter can lot easier think Theres no need buy foam-cutting kit expensive power supply such Variac transformer Heres innovative way will save some money As do-it-yourself method takes little patience halfway steady hand items youll need complete home foam-cutting workshop listed later article costliest piece equipment simple 12-volt battery charger What follows basic how-to presentation no technical jargon relative newcomers hobby should have no difficulties understanding cut foam wings first place youve ever destroyed beautiful wing balsa-and-ply masterpiece know answer After dumping pieces badly mangled wing garage floor go find plans figure out what need rebuild model put call friendly hobby shop time youve hung up know have bigger problem youd thought Ready-cut pieces such ribs lx found hobby shop other balsa supliers shopkeeper may try convince purchase wing kit made model may suggest buy some balsa stock start rebuilding Beginners take note Ualess ribs same shape least gives fighting chance time usually against you start rebuilding As promised such confusing terminology wing root airfoil etc banished article decide rebuild now face decision can trace out shape ribs carefully hand cut individually balsa sheet 66 Model Aviation brackets cutting wire mounted 40-in length 1 x 3-in pine stock arranged shown bolts secure brackets firmly eliminate movement cutting wire attached brackets insulated paper clip wire loop alligator clip connects wire power supply means eight foot length 16-gauge lamp cord Once its attached cutting wire lamp cord positioned out way taped wont interfere cutting An insulated spring used attach cutting wire opposite bracket keeps tension wire heats up Again lamp cord secured out way Left Getting ready cut wing blank block bead foam held place cuffing board nails templates plywood case secured pins eliminate movement toothpicks extending front rear foam used guide cutting wire foam Right single pass cutting wire reveals contour top wing patience spar notch can cut clean straight Once other foam blank has cut wing ready light sanding finishing have band saw can sandwich sheets between two tracings using templates cut ribs once templates should made material thats harder balsa band saw blade can guided around Band sawing much better way Its quicker hand cutting produces identical ribs Hand-cut ribs will need sanded matching contour Lets assume chose rebuild havent mentioned frustration youre going feel youve glued ribs leading edge piece find spar notches dont line up rebuilding wing seems like too much trouble using wing kitassuming available modelmay seem like too much money Tower Hobbies catalog example wing kits some Goldberg Great Planes models range $1750 $3895 modelers would rather cut ribs hand pay price An easier alternative course cut own wings out foam Making foam-cutting bow easy minimum hand tools required Ive found 1 x 3-in pine has enough strength stand up tension will undergo Its also easiest materials work Since trainers have wingspans no six feet strongly recommend keeping cutting capability wire maximum three feet Cut 40-in length 1 x 3-in pine stockeither No 2 clear use No 2 pine costs about 30 cents foot compared about 85 cents clear pine savings like dont mind seeing few knots along board Obtain two standard metal shelf brackets l0-to-12-inch size about $150 hardware stores Drill three A-in holes broad end bracket shown photo holes will accept wood screws nuts bolts attach brackets end wood Drill -in hole end bracket accommodate hanging setup cutting wire Mount first bracket end bow measure about 38 locate mount other bracket sure face brackets inward toward other shown Once both brackets firmly mounted wrap individually electrical tape Run tape bracket fastens wood way bottom local hardware store carries rolls electrical tape about 79 cents apiece desired can wrap entire bracket before mounting brackets mounted taped facing inward youre ready hang wire number suitable wire types choose youre concerned about keeping cost down consider using piece welding wire stainless steel fishing leader nickel chromium wire Welding wire type used Mig welders excellent choice start Go mechanic auto body shop ask piece about four feet long Im sure theyll oblige Welding wire can also ordered through almost discount tool catalogs welder supply houses through Sears sure wire 023 should also copper-jacketed steel Unlike softer steel wire copper-jacketed type wont sag heated Dont use galvanized wire Stainless steel fishing leader may used sure wire solid wire braided Since leader usually marked pounds ie 40-poundtest tell salesperson need diameter 020 025 small spoolmuch youll useaverages about $195 Finally have access nickel chromium wire dont mind expense means use Its good wire cutting foambut no better inexpensive cutter making Thread small paper clip through A-in hole bottom brackets will used attachment point cutting wire As alternative paper clip can cut piece heavier-gauge solid wire loop through hole paper clip wire loop must insulated cutting wire attachment point Electrical tape works fine Ive also used piece insulation stripped 18-gauge wire no problems Attach small reasonably strong spring other %-in hole Insulate end wire will connected Springs Continued page 105 July1991 67 Up Around/Aldrich Continued page 93 lately concerned care ball bearings used engines commented last time about use Rislone after run and/or storage lube Lest think after run lube important well-known manufacturer once commented 31 oil made him lots money Another thing remember manufacturers can afford put highest quality high-performance bearings engines ultimate cost consumer would prohibitive few relate lot bearing problems failure use Castor oil fuel Bert Striegler lead engineer Conoco now retired spent over $300000 prove least 3% Castor oil needed fuels addition chemical engineer friend related laboratory tests show synthetics used today produce acids attack metal burned comments directed toward longer engine life once ran fuel 10% Castrol MSSR synthetic lube 88% pure nitro 2% propylene oxide during speed meet perfectly willing sacrifice engine go fast Let desire guide Id like compile listing suppliers products CL FF including specialty items engines such mufflers Anyone would like included should send price list catalog sheet list complete can sending SASE may recall Doug Spreng didnt fly much CL Stunt after 1952 Instead became engrossed Radio Control design developed something think call feedback servo tell its used RC units today Foam/Du naway Continued page 67 can obtained quite inexpensively hardware stores main idea strength length Look spring good tension its too long can always cut down Examine cutting wire bends kinks before attaching between two brackets way accomplishing place end wire vise hold other end hand sight down its length Pull gently wire check bends Bend wire fingers remove Attach wire paper clip wire loop twisting few times security Stretch spring using pliers possible attach secure cutting wire its end Measure wire should 30 36 inches long thats maximum cut youll able work wire firmly attached between two insulated positions run length erAfter Muffler Experts Evuat.. Don Lowe RCM set-up has shown 6 dE drop very little RPM loss Brian Lee BIC Reportjeers None.it never cracked split melted came loose anything just hung ate noise Howard Crispin Sound Model Aeronautics dropped almost 6 db.the engine wIll turn few hundred RPM more.Oulte impressive Now Two Sizes $j995 up 49 size List $2405KDI 50 tosize10426 SE 206th P1 ListKent WA 98031 Postage ead headliag Free 450 PM256 5545053 Checls cc Mosey Ordees OSJLY July 1991 105 Super Light weight Construction Made USA No Advanced Modeling Skills Necessary Build Accepts X-Cell Kalt Hirobo GMP & Schiuter Kit includes Bodys Clear Canopy Landing Gear Flesable Tail Drive Unit Wood ~eBluePrint some E NTURY Pilotatation Machine ______________________________________ Shocks AH-1S TOW COBRA 36995 AH-64 APACHE 38995 OH-lB HUEY 27995 UH-60A BLACK HAWK 36995 WESTLAND SEAKING 34995 NEW AIRWOLE w/Retracts . 28995 759 E BROKAW RD SAN JOSE CA 95112 TEL & FAX 408 4361 325] WORLD CLASS RIC HELICOPTERS & ACCESSORIES IMPORT & EXPORT SUNBIRD SENSATION WITH STYLE Sunbird combines eye opening performance truly distinctive styling terrific flying design Whether choose 40 size Sunbird 10 Sunbird Jr youll find Sunbird perfect sport plane %fl PRECISION PRODUCTS INC 714 592-5144 510 E Arrow Highway San Dimas CA 91773 Available dealer Made America American Technology RJL K 61 Features include Single Ring Forged Piston Investment Cast Crankcase Schnuerle Porting Double Bail Bearings Forged Rod Bushed Both Ends Machined Latest Computer Controlled Equipment HP VT2J & VT49 Four Cycle Made Austria PJL hwbwoles Features Include Double Bell Bearings ABC Overhead Rotary Valves supported roller bearings Forged Rod Bushed both ends Ringed ABC Piston/Cylinder true chrome HP Gold Cup 61 ABC Also Available 20 40 Sizes 61 Hell ringed 40 & 61 rear intake Marine versions Features Include Schnuerle Porting Double Bail Bearings Slide Valve Carburetor Forged Rod ed both ends ABC Piston/Cylinder true chrome Vintage Forster Glow & Ignition very low production engine produced America Sold factory direct Glow $9500Ignition $73500 choice of29 36 Add $300 S&ll- CA Residents add tax 4-6 week delivery FACTORY PARTS & SERVICE FOR HB ENGINES- RJL ENGINES- HP ENGINES KRAFT 61 Cox CONQUEST 15 TAIPAN 40 HGK ENGINES FORSTER ENGINES MCCOY SERIES 21 BLACK HEAD FINNED CASEI CALL OR WRfl FOR IEEE 1NFORMA77ON RJL INDUSTRIES USA PO BoxS SIERRA M&iRR CA 91025 TELEPHONE 818 359-0016 AT LAST An Effect ye H gh Tech Engine Cleaner R/C Engines Removes Burned-On Fuel Residue Encrusted Carbon anteed ONLY $895 Add $200 S & H CA rus add 725% tax Clean Engines-Run Cooler-Last Longer Send Check Money OrderTo AIRBORNE HOBBIES 3764 30TH ST SAN DIEGO CA 92104 619543-9703 18-gauge wire connect bow power supply Commonly referred lamp cord 18-gauge wire available hardware stores about 10 cents foot length wire entirely up power supply will within arms reach work eight-foot length lamp cord will Strip insulation off end cord Attach alligator clip stripped end Connect clip cutting wire shown photo run lamp cord up bracket across entire length bow Tape wire down point bracket across bow keep lamp cord out way during cutting Strip clip another length lamp cord attach cutting wire thats connected spring Attach alligator clips other ends lamp cord connectors power supply power supply merely battery charger use Sears model 934503050 Called 10/2/50-amp charger comes ammeter sells about $40 Any other type battery charger happen have around house should work just well An ammeter seems essential operation Should hook up wrong type wire future experiments meter will show youre drawing too amps excess amps create excess heat causing wire burn foam cuts usually resulting uneven cutting connecting system set charger two amps cutting cutting wires draw between two four amps Connecting bow power supply simple Lay bow down make sure cutting wire isnt touching anything connect lead positive clamp battery charger other negative clamp whatever necessary ensure charger clamps dont contact other use bow Turn charger pick up bow Position small scrap bead foam Dwl Sd Nose Gear a45 Fults Tooling PO Box 95 Champaign IL 61824 255 Eot Ashland/PO Sos 727/Soda Spriogs Idaho 83276 next cutting wire just second two cutting wire will hot enough cut foamand burn fingers Make habit keeping fingers away wire Making templates Now know foam-cutter works next step make templates actually cut out wing bead foam use comes sheets different sizes use 2in-thick stock thats cut 2 x 3-ft pieces Prices vary considerably area country another Insulating bead foam will also work can choose other varieties Nows time experiment Im convinced almost anything can used template Before choosing material however ask yourself two questions Will template reused must cuts want reusable template will cut evenly use material wont distorted ruined use Formica metal templates will last indefinitely Once youve made templates notched wing spars youll need attach prong some sort end guide cutting wire foam use round toothpicks gluing about half length extends beyond template ends Cutting foam recommend using 106 Model Aviation IO25SqAah I416IbFIyinoWoioh~GIo.Fa&CowI -.,-,,oSodac.AIoaLodngGaa CIaOCanopyAaiIobIa Sadie l~ S255Sheaad Ki S365~DeIe Shaead Kd $495 DEALERS INQUIRES WELCOME Electric F ight LIghtweight 12 OLuaauey back Adjustable swItchIng poIntrasstee hookup $2995 ON/OFF Controller Power save weight Vaiy high efficIency auly eeev baa at2OA51ze2Zot3x63 AddSlAl8foeshippiag Califoaio rexidoxo dd 725% $217 Tee Saud Check Sr Inoney order Ia comeoais,/jHigh Sky Fatahaeaaaeetar3929 Kansas St #9 aStor ooooacon S aba availableSan DlegoCA 92104 Satisfaction Guaranteed cutting board Its much easier cut piece thats secured nails board thats simply lying workbench scrap piece plywood will Pound several nails through board ready use Position templates end piece foam cut Attach firmly using same kind pin used building model Position foam cutting board pushing down its snug Mold bow lay cutting wire across prongs gently slide foam Allow wire move through foam its own applying enough pressure keep moving Cutting out spar notches takes patience Dont attempt force wire through foam allow melt through seat itself Forcing wire guarantees poor results suggest start trailing edge work forward thats comfortable however theres nothing wrong doing other way around Cut out top bottom wing turn foam over cut out other side Set wing aside together scrap cut cases youll need cut second foam blank other wing half Set up templates another piece foam repeat entire process Give foam light sanding finishing replacement wing ready Foam-cutting easy way well worth learning can use technique cutting other model parts too wish thank fellow Californians Paul Ross Lakeside Doug Wilsman Ramona making number helpful suggesttons Please contact questions need information offered Ill glad provide ask enclose SASE Write 310 N Hunter St Ramona CA 92065 D High-Lift/Lennon Continued page 103 would have accelerate around 35 mph would have lower rate climb flaps rugged may lowered partially fully point models flight Turning maneuvers loops very tight flaps down Harrier has flown repeatedly windy conditions flaps down nose up engine throttled back model hovers little ground speed yet remains under good control Fellow fliers surprised doesnt stall fall off spin powered OS Max 40 FSR engine turning 10 x 6 propeller best ways keep cool S maintain control ROBART HINGE POINTS Simply best hinging system available application Drill hole add drop glue Hinge Point youre hinged DON TBEA ROBART CONTROL HORNS accurate on-center control linkage No need bent kinked control lines use horns built-in rotating ball link Reach other fine ROBART products hobby deaters nattonwide ROBART MFG POBOX 1247 STCHARLES IL 60174 708-584-7616 July 1991 107 TSIG1 SH71O Pkg 0124 $295 EA~ HINE_ THE HIGH-TECH HINGE DESIGNED FOR THE CYANOACRYLATE AGE Easier install other hinge No gouging picking messy epoxies Simply cut single knife slot hinge slide hinges place apply few drops favorite CA glue youre done SUPER FAST SUPER EASY SUPER STRONG SIG MFG CO INC.401-7 So Front St.Montezuma IA 50171 23-5154 ROBART HINGE POINTS AND CONTROL HORNS.
Edition: Model Aviation - 1991/07
Page Numbers: 66, 67, 105, 106, 107
-U Now theres easier way fashion replacement foam wings homemade foamcutter inexpensive make simple use ECarI Dunaway CUTTING FOAM wing part model airplane matter can lot easier think Theres no need buy foam-cutting kit expensive power supply such Variac transformer Heres innovative way will save some money As do-it-yourself method takes little patience halfway steady hand items youll need complete home foam-cutting workshop listed later article costliest piece equipment simple 12-volt battery charger What follows basic how-to presentation no technical jargon relative newcomers hobby should have no difficulties understanding cut foam wings first place youve ever destroyed beautiful wing balsa-and-ply masterpiece know answer After dumping pieces badly mangled wing garage floor go find plans figure out what need rebuild model put call friendly hobby shop time youve hung up know have bigger problem youd thought Ready-cut pieces such ribs lx found hobby shop other balsa supliers shopkeeper may try convince purchase wing kit made model may suggest buy some balsa stock start rebuilding Beginners take note Ualess ribs same shape least gives fighting chance time usually against you start rebuilding As promised such confusing terminology wing root airfoil etc banished article decide rebuild now face decision can trace out shape ribs carefully hand cut individually balsa sheet 66 Model Aviation brackets cutting wire mounted 40-in length 1 x 3-in pine stock arranged shown bolts secure brackets firmly eliminate movement cutting wire attached brackets insulated paper clip wire loop alligator clip connects wire power supply means eight foot length 16-gauge lamp cord Once its attached cutting wire lamp cord positioned out way taped wont interfere cutting An insulated spring used attach cutting wire opposite bracket keeps tension wire heats up Again lamp cord secured out way Left Getting ready cut wing blank block bead foam held place cuffing board nails templates plywood case secured pins eliminate movement toothpicks extending front rear foam used guide cutting wire foam Right single pass cutting wire reveals contour top wing patience spar notch can cut clean straight Once other foam blank has cut wing ready light sanding finishing have band saw can sandwich sheets between two tracings using templates cut ribs once templates should made material thats harder balsa band saw blade can guided around Band sawing much better way Its quicker hand cutting produces identical ribs Hand-cut ribs will need sanded matching contour Lets assume chose rebuild havent mentioned frustration youre going feel youve glued ribs leading edge piece find spar notches dont line up rebuilding wing seems like too much trouble using wing kitassuming available modelmay seem like too much money Tower Hobbies catalog example wing kits some Goldberg Great Planes models range $1750 $3895 modelers would rather cut ribs hand pay price An easier alternative course cut own wings out foam Making foam-cutting bow easy minimum hand tools required Ive found 1 x 3-in pine has enough strength stand up tension will undergo Its also easiest materials work Since trainers have wingspans no six feet strongly recommend keeping cutting capability wire maximum three feet Cut 40-in length 1 x 3-in pine stockeither No 2 clear use No 2 pine costs about 30 cents foot compared about 85 cents clear pine savings like dont mind seeing few knots along board Obtain two standard metal shelf brackets l0-to-12-inch size about $150 hardware stores Drill three A-in holes broad end bracket shown photo holes will accept wood screws nuts bolts attach brackets end wood Drill -in hole end bracket accommodate hanging setup cutting wire Mount first bracket end bow measure about 38 locate mount other bracket sure face brackets inward toward other shown Once both brackets firmly mounted wrap individually electrical tape Run tape bracket fastens wood way bottom local hardware store carries rolls electrical tape about 79 cents apiece desired can wrap entire bracket before mounting brackets mounted taped facing inward youre ready hang wire number suitable wire types choose youre concerned about keeping cost down consider using piece welding wire stainless steel fishing leader nickel chromium wire Welding wire type used Mig welders excellent choice start Go mechanic auto body shop ask piece about four feet long Im sure theyll oblige Welding wire can also ordered through almost discount tool catalogs welder supply houses through Sears sure wire 023 should also copper-jacketed steel Unlike softer steel wire copper-jacketed type wont sag heated Dont use galvanized wire Stainless steel fishing leader may used sure wire solid wire braided Since leader usually marked pounds ie 40-poundtest tell salesperson need diameter 020 025 small spoolmuch youll useaverages about $195 Finally have access nickel chromium wire dont mind expense means use Its good wire cutting foambut no better inexpensive cutter making Thread small paper clip through A-in hole bottom brackets will used attachment point cutting wire As alternative paper clip can cut piece heavier-gauge solid wire loop through hole paper clip wire loop must insulated cutting wire attachment point Electrical tape works fine Ive also used piece insulation stripped 18-gauge wire no problems Attach small reasonably strong spring other %-in hole Insulate end wire will connected Springs Continued page 105 July1991 67 Up Around/Aldrich Continued page 93 lately concerned care ball bearings used engines commented last time about use Rislone after run and/or storage lube Lest think after run lube important well-known manufacturer once commented 31 oil made him lots money Another thing remember manufacturers can afford put highest quality high-performance bearings engines ultimate cost consumer would prohibitive few relate lot bearing problems failure use Castor oil fuel Bert Striegler lead engineer Conoco now retired spent over $300000 prove least 3% Castor oil needed fuels addition chemical engineer friend related laboratory tests show synthetics used today produce acids attack metal burned comments directed toward longer engine life once ran fuel 10% Castrol MSSR synthetic lube 88% pure nitro 2% propylene oxide during speed meet perfectly willing sacrifice engine go fast Let desire guide Id like compile listing suppliers products CL FF including specialty items engines such mufflers Anyone would like included should send price list catalog sheet list complete can sending SASE may recall Doug Spreng didnt fly much CL Stunt after 1952 Instead became engrossed Radio Control design developed something think call feedback servo tell its used RC units today Foam/Du naway Continued page 67 can obtained quite inexpensively hardware stores main idea strength length Look spring good tension its too long can always cut down Examine cutting wire bends kinks before attaching between two brackets way accomplishing place end wire vise hold other end hand sight down its length Pull gently wire check bends Bend wire fingers remove Attach wire paper clip wire loop twisting few times security Stretch spring using pliers possible attach secure cutting wire its end Measure wire should 30 36 inches long thats maximum cut youll able work wire firmly attached between two insulated positions run length erAfter Muffler Experts Evuat.. Don Lowe RCM set-up has shown 6 dE drop very little RPM loss Brian Lee BIC Reportjeers None.it never cracked split melted came loose anything just hung ate noise Howard Crispin Sound Model Aeronautics dropped almost 6 db.the engine wIll turn few hundred RPM more.Oulte impressive Now Two Sizes $j995 up 49 size List $2405KDI 50 tosize10426 SE 206th P1 ListKent WA 98031 Postage ead headliag Free 450 PM256 5545053 Checls cc Mosey Ordees OSJLY July 1991 105 Super Light weight Construction Made USA No Advanced Modeling Skills Necessary Build Accepts X-Cell Kalt Hirobo GMP & Schiuter Kit includes Bodys Clear Canopy Landing Gear Flesable Tail Drive Unit Wood ~eBluePrint some E NTURY Pilotatation Machine ______________________________________ Shocks AH-1S TOW COBRA 36995 AH-64 APACHE 38995 OH-lB HUEY 27995 UH-60A BLACK HAWK 36995 WESTLAND SEAKING 34995 NEW AIRWOLE w/Retracts . 28995 759 E BROKAW RD SAN JOSE CA 95112 TEL & FAX 408 4361 325] WORLD CLASS RIC HELICOPTERS & ACCESSORIES IMPORT & EXPORT SUNBIRD SENSATION WITH STYLE Sunbird combines eye opening performance truly distinctive styling terrific flying design Whether choose 40 size Sunbird 10 Sunbird Jr youll find Sunbird perfect sport plane %fl PRECISION PRODUCTS INC 714 592-5144 510 E Arrow Highway San Dimas CA 91773 Available dealer Made America American Technology RJL K 61 Features include Single Ring Forged Piston Investment Cast Crankcase Schnuerle Porting Double Bail Bearings Forged Rod Bushed Both Ends Machined Latest Computer Controlled Equipment HP VT2J & VT49 Four Cycle Made Austria PJL hwbwoles Features Include Double Bell Bearings ABC Overhead Rotary Valves supported roller bearings Forged Rod Bushed both ends Ringed ABC Piston/Cylinder true chrome HP Gold Cup 61 ABC Also Available 20 40 Sizes 61 Hell ringed 40 & 61 rear intake Marine versions Features Include Schnuerle Porting Double Bail Bearings Slide Valve Carburetor Forged Rod ed both ends ABC Piston/Cylinder true chrome Vintage Forster Glow & Ignition very low production engine produced America Sold factory direct Glow $9500Ignition $73500 choice of29 36 Add $300 S&ll- CA Residents add tax 4-6 week delivery FACTORY PARTS & SERVICE FOR HB ENGINES- RJL ENGINES- HP ENGINES KRAFT 61 Cox CONQUEST 15 TAIPAN 40 HGK ENGINES FORSTER ENGINES MCCOY SERIES 21 BLACK HEAD FINNED CASEI CALL OR WRfl FOR IEEE 1NFORMA77ON RJL INDUSTRIES USA PO BoxS SIERRA M&iRR CA 91025 TELEPHONE 818 359-0016 AT LAST An Effect ye H gh Tech Engine Cleaner R/C Engines Removes Burned-On Fuel Residue Encrusted Carbon anteed ONLY $895 Add $200 S & H CA rus add 725% tax Clean Engines-Run Cooler-Last Longer Send Check Money OrderTo AIRBORNE HOBBIES 3764 30TH ST SAN DIEGO CA 92104 619543-9703 18-gauge wire connect bow power supply Commonly referred lamp cord 18-gauge wire available hardware stores about 10 cents foot length wire entirely up power supply will within arms reach work eight-foot length lamp cord will Strip insulation off end cord Attach alligator clip stripped end Connect clip cutting wire shown photo run lamp cord up bracket across entire length bow Tape wire down point bracket across bow keep lamp cord out way during cutting Strip clip another length lamp cord attach cutting wire thats connected spring Attach alligator clips other ends lamp cord connectors power supply power supply merely battery charger use Sears model 934503050 Called 10/2/50-amp charger comes ammeter sells about $40 Any other type battery charger happen have around house should work just well An ammeter seems essential operation Should hook up wrong type wire future experiments meter will show youre drawing too amps excess amps create excess heat causing wire burn foam cuts usually resulting uneven cutting connecting system set charger two amps cutting cutting wires draw between two four amps Connecting bow power supply simple Lay bow down make sure cutting wire isnt touching anything connect lead positive clamp battery charger other negative clamp whatever necessary ensure charger clamps dont contact other use bow Turn charger pick up bow Position small scrap bead foam Dwl Sd Nose Gear a45 Fults Tooling PO Box 95 Champaign IL 61824 255 Eot Ashland/PO Sos 727/Soda Spriogs Idaho 83276 next cutting wire just second two cutting wire will hot enough cut foamand burn fingers Make habit keeping fingers away wire Making templates Now know foam-cutter works next step make templates actually cut out wing bead foam use comes sheets different sizes use 2in-thick stock thats cut 2 x 3-ft pieces Prices vary considerably area country another Insulating bead foam will also work can choose other varieties Nows time experiment Im convinced almost anything can used template Before choosing material however ask yourself two questions Will template reused must cuts want reusable template will cut evenly use material wont distorted ruined use Formica metal templates will last indefinitely Once youve made templates notched wing spars youll need attach prong some sort end guide cutting wire foam use round toothpicks gluing about half length extends beyond template ends Cutting foam recommend using 106 Model Aviation IO25SqAah I416IbFIyinoWoioh~GIo.Fa&CowI -.,-,,oSodac.AIoaLodngGaa CIaOCanopyAaiIobIa Sadie l~ S255Sheaad Ki S365~DeIe Shaead Kd $495 DEALERS INQUIRES WELCOME Electric F ight LIghtweight 12 OLuaauey back Adjustable swItchIng poIntrasstee hookup $2995 ON/OFF Controller Power save weight Vaiy high efficIency auly eeev baa at2OA51ze2Zot3x63 AddSlAl8foeshippiag Califoaio rexidoxo dd 725% $217 Tee Saud Check Sr Inoney order Ia comeoais,/jHigh Sky Fatahaeaaaeetar3929 Kansas St #9 aStor ooooacon S aba availableSan DlegoCA 92104 Satisfaction Guaranteed cutting board Its much easier cut piece thats secured nails board thats simply lying workbench scrap piece plywood will Pound several nails through board ready use Position templates end piece foam cut Attach firmly using same kind pin used building model Position foam cutting board pushing down its snug Mold bow lay cutting wire across prongs gently slide foam Allow wire move through foam its own applying enough pressure keep moving Cutting out spar notches takes patience Dont attempt force wire through foam allow melt through seat itself Forcing wire guarantees poor results suggest start trailing edge work forward thats comfortable however theres nothing wrong doing other way around Cut out top bottom wing turn foam over cut out other side Set wing aside together scrap cut cases youll need cut second foam blank other wing half Set up templates another piece foam repeat entire process Give foam light sanding finishing replacement wing ready Foam-cutting easy way well worth learning can use technique cutting other model parts too wish thank fellow Californians Paul Ross Lakeside Doug Wilsman Ramona making number helpful suggesttons Please contact questions need information offered Ill glad provide ask enclose SASE Write 310 N Hunter St Ramona CA 92065 D High-Lift/Lennon Continued page 103 would have accelerate around 35 mph would have lower rate climb flaps rugged may lowered partially fully point models flight Turning maneuvers loops very tight flaps down Harrier has flown repeatedly windy conditions flaps down nose up engine throttled back model hovers little ground speed yet remains under good control Fellow fliers surprised doesnt stall fall off spin powered OS Max 40 FSR engine turning 10 x 6 propeller best ways keep cool S maintain control ROBART HINGE POINTS Simply best hinging system available application Drill hole add drop glue Hinge Point youre hinged DON TBEA ROBART CONTROL HORNS accurate on-center control linkage No need bent kinked control lines use horns built-in rotating ball link Reach other fine ROBART products hobby deaters nattonwide ROBART MFG POBOX 1247 STCHARLES IL 60174 708-584-7616 July 1991 107 TSIG1 SH71O Pkg 0124 $295 EA~ HINE_ THE HIGH-TECH HINGE DESIGNED FOR THE CYANOACRYLATE AGE Easier install other hinge No gouging picking messy epoxies Simply cut single knife slot hinge slide hinges place apply few drops favorite CA glue youre done SUPER FAST SUPER EASY SUPER STRONG SIG MFG CO INC.401-7 So Front St.Montezuma IA 50171 23-5154 ROBART HINGE POINTS AND CONTROL HORNS.
Edition: Model Aviation - 1991/07
Page Numbers: 66, 67, 105, 106, 107
-U Now theres easier way fashion replacement foam wings homemade foamcutter inexpensive make simple use ECarI Dunaway CUTTING FOAM wing part model airplane matter can lot easier think Theres no need buy foam-cutting kit expensive power supply such Variac transformer Heres innovative way will save some money As do-it-yourself method takes little patience halfway steady hand items youll need complete home foam-cutting workshop listed later article costliest piece equipment simple 12-volt battery charger What follows basic how-to presentation no technical jargon relative newcomers hobby should have no difficulties understanding cut foam wings first place youve ever destroyed beautiful wing balsa-and-ply masterpiece know answer After dumping pieces badly mangled wing garage floor go find plans figure out what need rebuild model put call friendly hobby shop time youve hung up know have bigger problem youd thought Ready-cut pieces such ribs lx found hobby shop other balsa supliers shopkeeper may try convince purchase wing kit made model may suggest buy some balsa stock start rebuilding Beginners take note Ualess ribs same shape least gives fighting chance time usually against you start rebuilding As promised such confusing terminology wing root airfoil etc banished article decide rebuild now face decision can trace out shape ribs carefully hand cut individually balsa sheet 66 Model Aviation brackets cutting wire mounted 40-in length 1 x 3-in pine stock arranged shown bolts secure brackets firmly eliminate movement cutting wire attached brackets insulated paper clip wire loop alligator clip connects wire power supply means eight foot length 16-gauge lamp cord Once its attached cutting wire lamp cord positioned out way taped wont interfere cutting An insulated spring used attach cutting wire opposite bracket keeps tension wire heats up Again lamp cord secured out way Left Getting ready cut wing blank block bead foam held place cuffing board nails templates plywood case secured pins eliminate movement toothpicks extending front rear foam used guide cutting wire foam Right single pass cutting wire reveals contour top wing patience spar notch can cut clean straight Once other foam blank has cut wing ready light sanding finishing have band saw can sandwich sheets between two tracings using templates cut ribs once templates should made material thats harder balsa band saw blade can guided around Band sawing much better way Its quicker hand cutting produces identical ribs Hand-cut ribs will need sanded matching contour Lets assume chose rebuild havent mentioned frustration youre going feel youve glued ribs leading edge piece find spar notches dont line up rebuilding wing seems like too much trouble using wing kitassuming available modelmay seem like too much money Tower Hobbies catalog example wing kits some Goldberg Great Planes models range $1750 $3895 modelers would rather cut ribs hand pay price An easier alternative course cut own wings out foam Making foam-cutting bow easy minimum hand tools required Ive found 1 x 3-in pine has enough strength stand up tension will undergo Its also easiest materials work Since trainers have wingspans no six feet strongly recommend keeping cutting capability wire maximum three feet Cut 40-in length 1 x 3-in pine stockeither No 2 clear use No 2 pine costs about 30 cents foot compared about 85 cents clear pine savings like dont mind seeing few knots along board Obtain two standard metal shelf brackets l0-to-12-inch size about $150 hardware stores Drill three A-in holes broad end bracket shown photo holes will accept wood screws nuts bolts attach brackets end wood Drill -in hole end bracket accommodate hanging setup cutting wire Mount first bracket end bow measure about 38 locate mount other bracket sure face brackets inward toward other shown Once both brackets firmly mounted wrap individually electrical tape Run tape bracket fastens wood way bottom local hardware store carries rolls electrical tape about 79 cents apiece desired can wrap entire bracket before mounting brackets mounted taped facing inward youre ready hang wire number suitable wire types choose youre concerned about keeping cost down consider using piece welding wire stainless steel fishing leader nickel chromium wire Welding wire type used Mig welders excellent choice start Go mechanic auto body shop ask piece about four feet long Im sure theyll oblige Welding wire can also ordered through almost discount tool catalogs welder supply houses through Sears sure wire 023 should also copper-jacketed steel Unlike softer steel wire copper-jacketed type wont sag heated Dont use galvanized wire Stainless steel fishing leader may used sure wire solid wire braided Since leader usually marked pounds ie 40-poundtest tell salesperson need diameter 020 025 small spoolmuch youll useaverages about $195 Finally have access nickel chromium wire dont mind expense means use Its good wire cutting foambut no better inexpensive cutter making Thread small paper clip through A-in hole bottom brackets will used attachment point cutting wire As alternative paper clip can cut piece heavier-gauge solid wire loop through hole paper clip wire loop must insulated cutting wire attachment point Electrical tape works fine Ive also used piece insulation stripped 18-gauge wire no problems Attach small reasonably strong spring other %-in hole Insulate end wire will connected Springs Continued page 105 July1991 67 Up Around/Aldrich Continued page 93 lately concerned care ball bearings used engines commented last time about use Rislone after run and/or storage lube Lest think after run lube important well-known manufacturer once commented 31 oil made him lots money Another thing remember manufacturers can afford put highest quality high-performance bearings engines ultimate cost consumer would prohibitive few relate lot bearing problems failure use Castor oil fuel Bert Striegler lead engineer Conoco now retired spent over $300000 prove least 3% Castor oil needed fuels addition chemical engineer friend related laboratory tests show synthetics used today produce acids attack metal burned comments directed toward longer engine life once ran fuel 10% Castrol MSSR synthetic lube 88% pure nitro 2% propylene oxide during speed meet perfectly willing sacrifice engine go fast Let desire guide Id like compile listing suppliers products CL FF including specialty items engines such mufflers Anyone would like included should send price list catalog sheet list complete can sending SASE may recall Doug Spreng didnt fly much CL Stunt after 1952 Instead became engrossed Radio Control design developed something think call feedback servo tell its used RC units today Foam/Du naway Continued page 67 can obtained quite inexpensively hardware stores main idea strength length Look spring good tension its too long can always cut down Examine cutting wire bends kinks before attaching between two brackets way accomplishing place end wire vise hold other end hand sight down its length Pull gently wire check bends Bend wire fingers remove Attach wire paper clip wire loop twisting few times security Stretch spring using pliers possible attach secure cutting wire its end Measure wire should 30 36 inches long thats maximum cut youll able work wire firmly attached between two insulated positions run length erAfter Muffler Experts Evuat.. Don Lowe RCM set-up has shown 6 dE drop very little RPM loss Brian Lee BIC Reportjeers None.it never cracked split melted came loose anything just hung ate noise Howard Crispin Sound Model Aeronautics dropped almost 6 db.the engine wIll turn few hundred RPM more.Oulte impressive Now Two Sizes $j995 up 49 size List $2405KDI 50 tosize10426 SE 206th P1 ListKent WA 98031 Postage ead headliag Free 450 PM256 5545053 Checls cc Mosey Ordees OSJLY July 1991 105 Super Light weight Construction Made USA No Advanced Modeling Skills Necessary Build Accepts X-Cell Kalt Hirobo GMP & Schiuter Kit includes Bodys Clear Canopy Landing Gear Flesable Tail Drive Unit Wood ~eBluePrint some E NTURY Pilotatation Machine ______________________________________ Shocks AH-1S TOW COBRA 36995 AH-64 APACHE 38995 OH-lB HUEY 27995 UH-60A BLACK HAWK 36995 WESTLAND SEAKING 34995 NEW AIRWOLE w/Retracts . 28995 759 E BROKAW RD SAN JOSE CA 95112 TEL & FAX 408 4361 325] WORLD CLASS RIC HELICOPTERS & ACCESSORIES IMPORT & EXPORT SUNBIRD SENSATION WITH STYLE Sunbird combines eye opening performance truly distinctive styling terrific flying design Whether choose 40 size Sunbird 10 Sunbird Jr youll find Sunbird perfect sport plane %fl PRECISION PRODUCTS INC 714 592-5144 510 E Arrow Highway San Dimas CA 91773 Available dealer Made America American Technology RJL K 61 Features include Single Ring Forged Piston Investment Cast Crankcase Schnuerle Porting Double Bail Bearings Forged Rod Bushed Both Ends Machined Latest Computer Controlled Equipment HP VT2J & VT49 Four Cycle Made Austria PJL hwbwoles Features Include Double Bell Bearings ABC Overhead Rotary Valves supported roller bearings Forged Rod Bushed both ends Ringed ABC Piston/Cylinder true chrome HP Gold Cup 61 ABC Also Available 20 40 Sizes 61 Hell ringed 40 & 61 rear intake Marine versions Features Include Schnuerle Porting Double Bail Bearings Slide Valve Carburetor Forged Rod ed both ends ABC Piston/Cylinder true chrome Vintage Forster Glow & Ignition very low production engine produced America Sold factory direct Glow $9500Ignition $73500 choice of29 36 Add $300 S&ll- CA Residents add tax 4-6 week delivery FACTORY PARTS & SERVICE FOR HB ENGINES- RJL ENGINES- HP ENGINES KRAFT 61 Cox CONQUEST 15 TAIPAN 40 HGK ENGINES FORSTER ENGINES MCCOY SERIES 21 BLACK HEAD FINNED CASEI CALL OR WRfl FOR IEEE 1NFORMA77ON RJL INDUSTRIES USA PO BoxS SIERRA M&iRR CA 91025 TELEPHONE 818 359-0016 AT LAST An Effect ye H gh Tech Engine Cleaner R/C Engines Removes Burned-On Fuel Residue Encrusted Carbon anteed ONLY $895 Add $200 S & H CA rus add 725% tax Clean Engines-Run Cooler-Last Longer Send Check Money OrderTo AIRBORNE HOBBIES 3764 30TH ST SAN DIEGO CA 92104 619543-9703 18-gauge wire connect bow power supply Commonly referred lamp cord 18-gauge wire available hardware stores about 10 cents foot length wire entirely up power supply will within arms reach work eight-foot length lamp cord will Strip insulation off end cord Attach alligator clip stripped end Connect clip cutting wire shown photo run lamp cord up bracket across entire length bow Tape wire down point bracket across bow keep lamp cord out way during cutting Strip clip another length lamp cord attach cutting wire thats connected spring Attach alligator clips other ends lamp cord connectors power supply power supply merely battery charger use Sears model 934503050 Called 10/2/50-amp charger comes ammeter sells about $40 Any other type battery charger happen have around house should work just well An ammeter seems essential operation Should hook up wrong type wire future experiments meter will show youre drawing too amps excess amps create excess heat causing wire burn foam cuts usually resulting uneven cutting connecting system set charger two amps cutting cutting wires draw between two four amps Connecting bow power supply simple Lay bow down make sure cutting wire isnt touching anything connect lead positive clamp battery charger other negative clamp whatever necessary ensure charger clamps dont contact other use bow Turn charger pick up bow Position small scrap bead foam Dwl Sd Nose Gear a45 Fults Tooling PO Box 95 Champaign IL 61824 255 Eot Ashland/PO Sos 727/Soda Spriogs Idaho 83276 next cutting wire just second two cutting wire will hot enough cut foamand burn fingers Make habit keeping fingers away wire Making templates Now know foam-cutter works next step make templates actually cut out wing bead foam use comes sheets different sizes use 2in-thick stock thats cut 2 x 3-ft pieces Prices vary considerably area country another Insulating bead foam will also work can choose other varieties Nows time experiment Im convinced almost anything can used template Before choosing material however ask yourself two questions Will template reused must cuts want reusable template will cut evenly use material wont distorted ruined use Formica metal templates will last indefinitely Once youve made templates notched wing spars youll need attach prong some sort end guide cutting wire foam use round toothpicks gluing about half length extends beyond template ends Cutting foam recommend using 106 Model Aviation IO25SqAah I416IbFIyinoWoioh~GIo.Fa&CowI -.,-,,oSodac.AIoaLodngGaa CIaOCanopyAaiIobIa Sadie l~ S255Sheaad Ki S365~DeIe Shaead Kd $495 DEALERS INQUIRES WELCOME Electric F ight LIghtweight 12 OLuaauey back Adjustable swItchIng poIntrasstee hookup $2995 ON/OFF Controller Power save weight Vaiy high efficIency auly eeev baa at2OA51ze2Zot3x63 AddSlAl8foeshippiag Califoaio rexidoxo dd 725% $217 Tee Saud Check Sr Inoney order Ia comeoais,/jHigh Sky Fatahaeaaaeetar3929 Kansas St #9 aStor ooooacon S aba availableSan DlegoCA 92104 Satisfaction Guaranteed cutting board Its much easier cut piece thats secured nails board thats simply lying workbench scrap piece plywood will Pound several nails through board ready use Position templates end piece foam cut Attach firmly using same kind pin used building model Position foam cutting board pushing down its snug Mold bow lay cutting wire across prongs gently slide foam Allow wire move through foam its own applying enough pressure keep moving Cutting out spar notches takes patience Dont attempt force wire through foam allow melt through seat itself Forcing wire guarantees poor results suggest start trailing edge work forward thats comfortable however theres nothing wrong doing other way around Cut out top bottom wing turn foam over cut out other side Set wing aside together scrap cut cases youll need cut second foam blank other wing half Set up templates another piece foam repeat entire process Give foam light sanding finishing replacement wing ready Foam-cutting easy way well worth learning can use technique cutting other model parts too wish thank fellow Californians Paul Ross Lakeside Doug Wilsman Ramona making number helpful suggesttons Please contact questions need information offered Ill glad provide ask enclose SASE Write 310 N Hunter St Ramona CA 92065 D High-Lift/Lennon Continued page 103 would have accelerate around 35 mph would have lower rate climb flaps rugged may lowered partially fully point models flight Turning maneuvers loops very tight flaps down Harrier has flown repeatedly windy conditions flaps down nose up engine throttled back model hovers little ground speed yet remains under good control Fellow fliers surprised doesnt stall fall off spin powered OS Max 40 FSR engine turning 10 x 6 propeller best ways keep cool S maintain control ROBART HINGE POINTS Simply best hinging system available application Drill hole add drop glue Hinge Point youre hinged DON TBEA ROBART CONTROL HORNS accurate on-center control linkage No need bent kinked control lines use horns built-in rotating ball link Reach other fine ROBART products hobby deaters nattonwide ROBART MFG POBOX 1247 STCHARLES IL 60174 708-584-7616 July 1991 107 TSIG1 SH71O Pkg 0124 $295 EA~ HINE_ THE HIGH-TECH HINGE DESIGNED FOR THE CYANOACRYLATE AGE Easier install other hinge No gouging picking messy epoxies Simply cut single knife slot hinge slide hinges place apply few drops favorite CA glue youre done SUPER FAST SUPER EASY SUPER STRONG SIG MFG CO INC.401-7 So Front St.Montezuma IA 50171 23-5154 ROBART HINGE POINTS AND CONTROL HORNS.
