Radio Control: Electrics

MORE photos somewhat less text usual features months columnthis cause have abundance former less latter needed Fuses connections what consider risky situation existing some Electric products installations has fuses particular its lack thereofi early days Electric endeavors readily usable fuses round glass cy lindrical ones fuses associated holders quite bulky small models quite heavy Also time did see much value fusing didnt Well things change Over years learned hard way Astro 05 cobaft its gear drive top Kyosho 360 PT bottom sports new Astro Co bait 02/035 gear drive Astros new product fits just about aii ferrite 05 motors far rugged economy drive Kopskis yet seen Drives pinion gear must pressed onto motors 1/-in motor shaftas aii other Astro drives Info coiumn VERY unwise fuse Electric installations Now fuses principal part planes Cause Ive both seen experienced loss es various kindsfried armatures melted wir ing insulation welded switches etcwith systems didnt have fuse protect against overloads overloads can come easily unexpectedly Examples include such simple mat ters getting prop snarled tall grass weeds stalling motor perhaps having flight mishap read crash having Old L new Astro 15 cobalts brushes pulled clearly shows new larger brushes Note greater protrusion new brush holders needed because commut ator now larger rugged Same im provements Astro 05 cobalts well motor bury itself try run same time Stalled motors wiring shorts can easily result rather costly damage can easily inexpensively prevented fuse Besides relatively small light fusea now readily availableso no excuses Its interesting note imported Elec tric systemsincluding economy systems incorporate fuses systems embrace sold Kyosho Goldberg DSC Great Planes same time American-made productsincluding costly high-quality productsdont include feature As far Im concerned ALL Electric systems should include fuse protectionnot benefit motor wiring etc especially because potential safety hazard involved fact motor Ni-Cds can conKopskis coiiection K&W foiding props Above range size 6 x 4 15 x 7 Closeup prop hub L shows rugged construction 1/4-in shaft bore fact blades wili fold forward biades easily assembled removed re placed R Hub design accommodates very wide range blade sizes Hinge pin strong smooth permits easy folding Product line destined high-volume pro duction Sonic-Tronics 38 Model Aviation Radio Conoi Electrics Bob Kopski 25 West End Dr Lansdale PA 19446 Heres finished terminal heatshrunk tubing place attached fuse lugs sure tubing covers exposed terminal metal avoid shorts piece unshrunk Du-Bro tubing purposes comparison tam enormous energy stores such can rep resent significant fire hazard model mishap FOR THIS REASON FEEL IT WOULD BE PRUDENT MOVE TO ADD MUST FUSE SAFETY REQUIREMENT IN FU TURE AMA REGULATIONS Now Ive raised concern heres can add fuse existing systems new installations Take look photo sequence see whats involved Only few tools parts needed addition few minutes time fuse shown standard automotive ATC type available auto supply store Radio Shack available wide range ratings described simple numbers like 15 20 numbers current rating amperes beyond fuse will blow open circuit Such fuses plug very nicely standard elec trical disconnects also shown latter parts also readily available var ious styles same stores type pictured favorite choicecomes built-in par tial plastic insulator Continued page 135 ATT-CHEIC7 ON-Board Battery Tester Saves Time. Saves Models BAiTCHEK RX-1 $1495 ade USA NEW Install RO Models Check receiver battery status press button Small Light 1/2 oz Precise Rugged ORDER TODAY dealer Protune Corp 914 462-6452 PO Box 1808 Poughkeepsie NY 12601 New Fourmost Fillet Stop messing around gummy fillers sticky putties Use Fourmost Fillet get clean perfect contour hassle Fourmost Fillet continuous strip vinyl preformed make perfect fillet Fillet may easily installed cyanoacrylate adhesives can finished either paint iron-on materials Fourmost Fillet also perfect wing saddle seats 2 sizes small No 128 Fourmost medium No 129 Price 4 feet $350 Products 4040 24th Ave Forest Grove OR 97116 503 357-2732 March 1988 39 thats needed add safety fuse new existing Electric installation Wire shown Joiners 16-gauge Crimp terminal color-codes matched wire sizes Plier type tool left wire cutterlstripper Mid dle connector-cruncher Grunt Squeeze hard crimping tool handle presto super electrical mechanical bond made between wire terminal No need solder either N KL5] TOLED~ 040 TN RTY-FOU RTH ANNUAL RADIO CONTROL EXPOSITION APRIL 8 910 1988 FRIDAY9amto6pm SATURDAY9amto6pm SUNDAY9 am 430 pm TOLEDO SPORTS ARENA ONE MAIN STREET TOLEDO OHIO ADVANCED TICKETS may ordered sending self-addressed business size 4Vsx9 envelope TICKETS 38235 Castle Romulus Ml 48174 orders above 5 tickets must include extra postage US orders must include 25 cents per order handling charge foreign orders must include 50 cents per order handling charge need send addressed envelope will provide necessary postage Include check money order US funds made payable Weak Signals R/C Club Ticket prices $400 per day adults $100 per day children 12 under Please specify number Deadline ticket orders March 31 1988 sales final non-refundable orders will returned mid-March have included adequate postage will also contain program TICKETSAREALSOA VAILABLEA T THE DOOR Will Have Traditional Saturday Night Auction COMPETITION CLASSES NON-MILITARY SPORT SCALE PLANE IAMA Rules MILITARY SPORT SCALE PLANE IAMA Rules PRECISION SCALE PLANE AMA Rules PAUERN PLANE SPORT MONO-PLANE non-scale models SPORT 81-PLANE non-scale models onlyl OLD TIMER FREE FLIGHT R/C ASSIST R/C SAILPLANE non-scale models HELICOPTER R/C CAR COMPETITION BOAT MILITARY SCALE BOAT PLEASURE POWER BOAT WORKING VESSEL-UNARMED said days acquiring hard-won proficiency method better rank beginner can see aircraft turn ing downwind base turn its final legs coming lands would have useful Some other experienced pilots group werent easily satisfied needs elevator response Dave Kep harts reaction Perhaps bigger fan Another suggested bigger box glassed model inside comments escalated course defended homely brain child Heck after its Simple Simulator beginners can made almost no cost' Ah well cant win general response among BAM membership basically positive new ideas already sprouting Well line shack finished power could keep field demo Eric Rustand student Glider building class now regu larly attending club member last word wish Id chance try out soon Glider finished learn hard way poor old Gentle Lady looks pretty beat up make Simple Simulator club line shack hobby store ga rage attic non-RCer friend can enjoy next-best thing real thingwithout having get insur ance first RC Electrics/Kopski Continued page 39 final item needed some heat-shrink tubing prefer Du-Bro part number 439 hobby shop tubing has unshrunk diam eter yellow color Installing fuse connectors very easy ex isting fuseless installations select system wire preferably battery wire location close battery cut should obvious safety reasons such work best done installation battery deador near ly own installations have standard ized put fuse positive battery wire negative lead will just well Carefully strip insulation off wire cut being careful cut nick wire strands Also dead battery notwithstand ing never really take care inad vertently touch exposed battery terminals new wire ends Now twist newly exposed strands together fingers Insert exposed wire end terminal crimp wire-tube part terminal pictured sure use proper notch jaw crimping toolthis identified either wire gauge number color dot Read directions come tool electrical disconnect shown blue insulator sleeve blue-coded notch tools jaw used Blue code color indicates wire size case 16- 14-gauge wire Red 22- 18-gauge wire thats needed good job hefty squeezereally pour arm muscle assure deep very tight crimp Remove crimping tool carefully examine crimped dead 4 m $1400 m U battery U U pack.I U .a dead $30000 airplane prevent this. Voltruaster sophisticated precision vobmeter accurate expensive laboratory unit can confident readings gives true Unique features include -Four voltage ranges -Load Engage switch important determining cell condition -Load Status switch two different loads 200 ma 500 ma March 1988 135 26K18 Voltmaster Kit 26K18C $2795 $3795 presented Weak Signals R/C Club Toledo Ohio r IrU3La5 I.umpieie catalog II I I 116wl9thSLpoBac5llcUHIsalnuvaIeMo 65037 Phcuu 816 584-7121 L sand sand get humps bumps Try Easy SanderTM ami See Difference Made select wood extremely light sander hold full sheet sand paper Flat sanded accurate sanding surface Large flat surfaces sanding area LH 1505555 ex get shaky field isnt long enough Try Easy Drake TM See Difference Extremely easy install Hard find spring stool fiher washers Braking action remains constant during repeated hate install hinges Try Easy HingesTa See Difference single slot few drops C/A glue its done No going pinning hinge pins ts worry ahout lncredihly strong Virtually indestructihle useLO 100 24 hinges $2 55 ea S Three sizes 118 5/32 3116LH 140 141 142 OOuea Zn EMY5RNUER .e EA5YHRRKE0Z EAYHINUL TM TMTMP0 Box 1743 Marcos CA 92069 wire joint wiggling tugging wire little make sure its well captured crimped terminal Now comes really neat part Slip 3A-in length A-in Du-Bro heat-shrink tubing over terminal end tubing flush slightly extendingabout %2 beyond terminal end Carefully heat tub ing electric covering gun keeping hot airstream moving around tubing diameter seconds tubing will begin shrink will eventually form tightly around terminal shown Presto now have compact nice ly insulated fuse terminal some options exact proced ures First disconnects can purchased crimpable built-in partial insulators wire can simply soldered instead being crimped case somewhat longer piece heat-shrink tubing should used should extend very front terminal way back over about / wire sulation itself Another option purchase such terminals built-on plastic hoods already cover entire terminal quite bit bulky shown dont use reason further disadvantage type disconnect fuse fits bit THERE E NO SECRETS LIQUID FINISHES MASTER MODELING DESIGNING SCRATCH BUILDING loosely connection cannot tightened easily Ordinarily using connectors sulated heat-shrink tubing loosely fitting fuse can corrected removing fuse light ly squeezing disconnects two curled teeth pliers reinstalling fuse cant plastic-hooded connectors out cracking hood Choose fuse rating suited system plug both new wire termi nals just added youve got new level safety thats well worth small cost little time takes make personal choice 20-amp fuse Astro cobalt super ferrite motors 15 amps economy motors Related reading photos can found 1987 issues Model Aviation dated May June August September Folders photos shows personal collection K&W folding props Electrics No havent yet used look just great Im planning extensive se rtes test runs future meantime few highlights fine large growing line props Most various blade sizes shown except very smallest six-inch ones fit TOMS 7ECH8 MONOKOTING FLWNG AROUND 0 OLD TIME U CONTROL ALL ABOUT ENGINES MORE COMING S1O95 EACH HARRY B HIGLEY & SONS INC P 0 BOX 532 GLENWOOD ILL 60425 same two larger hub sizes shown blades molded fiberglass individually available readily replaceable hubs Isnt great able get replacement parts blades hubs designed blades fold forwardsomething anyone has happened upon startup will appreciate Also hubs rugged come ready-bored A-in shafts makes very nice use largest gear drives know A-in bore still has plenty hub metal around making what looks like great product design present props manufactured K&W 7824 Lexington Ave Philadelphia PA 19152 Plans under way Sonic-Tronics produce designs volume future meantime Tom Kerr head fan-maker will happy discuss product line fill orders Motor improvements Whenever Im aware new products product improvements try pass info along everyone photo shows such improvement Astro prod uct line Pictured old new Astro co balt 15 brushes removed No tice has relatively large brushes brush holders protrude farther case newer version brush size crease makes durable motor capable handling higher currents longer periods time Also reason brush holders protrude farther case commutator also largeranother improvement currenthandling ability have two cases bigger really better just ya know last clearly tIne best yet has really excited Ive often lamented about smalldiameter shafts gear drives LOTS local fliers MANY readers column constantly experiencing bending brealcing small-diameter gear-drive output shafts routine failure gear ausembly housings minor rough landings problem par ticularly case economy setups modelers using low-cost 05 systemsbut paying heavily gear assembly upkeep Well Im very happy report days may gone forever Heres just received some new Astro gear drives Part No 4046 designed fit As tro 02 035 cobalt motors gear ratio 2381 use same rugged metal hous ing heavy all-metal gears Astro 05/15 drives same RUGGED A-in output shaft 136 Model Aviation PRACTICAL SIZED GIANT SCALE MODELS NICK ZIROLI Jets too OC-3lA 1140 Span$4200 F4U CORSAIW2 193 Span$3000 ASMS ZERO2A 191 Span$3000 CuRTISP402A 194 Span$3000 AT-e TEXAN24 1101 Span$3000 F5F BEARCAT2A 186 Span$3000 FOKKERDR-127 183 Tripe$2700 Canopies Available Plans Sent Post-Paid within USA Send 5O Full Catalog Balsa Order Nick Ziroli 29 Edgar Dr Smithtown NY 11787 USA BUT come -in-bore pinion gear have mounting hole locations allow used ferrite OSs means can replace troublesome smallshafted reducers real brute keep us ing motor have cost $35 list may seem high really notjust soon damage parts economy drives have get replacements Astro drive heavier additional weight quickly forgot ten can actually continue flying after making landing after landing Finally youre tired good ol ferrite 05 can use drive its intended purpose 02/035 cobalt strongly recommend product consideration Coming future columns Im personally very big so-called 15 -size motors may want motors other Also test runs Astro 4fl46 drive some ferrite OSs varied props Please forward comments questions SASE please address listed beginning column HAPPY SILENT POWERED FLIGHT RC AerobaticsNan Putte Continued page 41 featured wings Both wings have same span chord wing area same equal-weight airplanes wing loadings would same bottom wing has substantial sweepback would exhibit dihedral effect result sweepback less dihedral would required aerodynamic center top wing about one-fourth wing chord back leading edge aerodynamic center bot tom wing almost trailing edge root chord means order get same longitudinal pitch lateral yaw characteris tics two airplanes swept-wing de sign would probably need longer tail moment and/or larger horizontal vertical tail surfaces addition center-of-gravity sweptwing design would further aft differences would expect find example demonstrates relatively simple change design can cause significant changes other parts airplane Lets try Figure 2 shows two differ ent kinds rudders same airplane Which likely create yaw roll youre trying Stall Turn air plane fly Knife Edge want pure yaw input rudder Rolling messes up maneuver Which rudder did pick Pattern airplanes likely have rudders like top because effective point applica tion force rudder deflected near bottom rudder means little no rolling moment will generated about axis fuselage other hand rudder bottom sketch will have great deal rolling moment generated rudder deflected wont see rudders like good designs Ill print kind design information now again theres interest Please let know responding advertisers mention read about ModelAviation used substrate build other types finish dacron polyester heat-shrink materi al similar Ceconite Stitts Poly-Fiber full-size aircraft Its advantages long life toughness resistance puncture tearing accepts paint dope quite light requires oniy minimum finish also contributes lightness has no adhesive fabric models framework given two three coats dope sanding lighdy between coats remove balsa fuzz Use enough dope thinner promote easy brushing since thinner evap orates does nothing towards building coating Any brush will serve preference sable long stralght hairs work dope balsa especially first coat ap ply dope surface will come con tact fabric including rib edges Koverall cut its grain running direction long dimension area covered Grain direction hard detect package tells find grain direc tion runs diagonally across wing example shrinkage will likely cause warp structure wing panel cut piece Koverall about two inches wider three four inches longer wing prefer cover wing halves starting center stretching fabric wards tip Lay Koverall bottom wing Brush strip dope about t/a thinned about 10% across wing Continued page 140 Specifications Wingspan 44 Wuight9A bs Power RK-740 Kit Includes Machine Cut Sanded Balsa Ply Foam Parts Full Size Rolled Plans Instruction Guide Necessary Hardware 2240711 9 Houston TX 77227 shipping 713 621-1462 March 1988 137 RC Scale/Wischers Continued page 43 E Tactical High Alt itude __The end Zij NA SAWSfamous line hobby saws Replacement Blades available dealer PAl Model Supply Razor #200 $288 Universal #500 P0 Box 3967 Torrance CA 90610 HOBBYPOXY TRUE TWO-PART EPOXY PAINTS 16 COLORS R ER EPOXY GLUES FOUR FORMULAS 5-MIN ID 45-MIN FAST FILL GRAIN FILLER QUICK-PREP POLYESTER RESIN FREE COLOR CARD AND BROCHURE Homeypoxy DIVISION PeltS Paint Company lac 36 Pine Street Rockaway NJ 07866

MORE photos somewhat less text usual features months columnthis cause have abundance former less latter needed Fuses connections what consider risky situation existing some Electric products installations has fuses particular its lack thereofi early days Electric endeavors readily usable fuses round glass cy lindrical ones fuses associated holders quite bulky small models quite heavy Also time did see much value fusing didnt Well things change Over years learned hard way Astro 05 cobaft its gear drive top Kyosho 360 PT bottom sports new Astro Co bait 02/035 gear drive Astros new product fits just about aii ferrite 05 motors far rugged economy drive Kopskis yet seen Drives pinion gear must pressed onto motors 1/-in motor shaftas aii other Astro drives Info coiumn VERY unwise fuse Electric installations Now fuses principal part planes Cause Ive both seen experienced loss es various kindsfried armatures melted wir ing insulation welded switches etcwith systems didnt have fuse protect against overloads overloads can come easily unexpectedly Examples include such simple mat ters getting prop snarled tall grass weeds stalling motor perhaps having flight mishap read crash having Old L new Astro 15 cobalts brushes pulled clearly shows new larger brushes Note greater protrusion new brush holders needed because commut ator now larger rugged Same im provements Astro 05 cobalts well motor bury itself try run same time Stalled motors wiring shorts can easily result rather costly damage can easily inexpensively prevented fuse Besides relatively small light fusea now readily availableso no excuses Its interesting note imported Elec tric systemsincluding economy systems incorporate fuses systems embrace sold Kyosho Goldberg DSC Great Planes same time American-made productsincluding costly high-quality productsdont include feature As far Im concerned ALL Electric systems should include fuse protectionnot benefit motor wiring etc especially because potential safety hazard involved fact motor Ni-Cds can conKopskis coiiection K&W foiding props Above range size 6 x 4 15 x 7 Closeup prop hub L shows rugged construction 1/4-in shaft bore fact blades wili fold forward biades easily assembled removed re placed R Hub design accommodates very wide range blade sizes Hinge pin strong smooth permits easy folding Product line destined high-volume pro duction Sonic-Tronics 38 Model Aviation Radio Conoi Electrics Bob Kopski 25 West End Dr Lansdale PA 19446 Heres finished terminal heatshrunk tubing place attached fuse lugs sure tubing covers exposed terminal metal avoid shorts piece unshrunk Du-Bro tubing purposes comparison tam enormous energy stores such can rep resent significant fire hazard model mishap FOR THIS REASON FEEL IT WOULD BE PRUDENT MOVE TO ADD MUST FUSE SAFETY REQUIREMENT IN FU TURE AMA REGULATIONS Now Ive raised concern heres can add fuse existing systems new installations Take look photo sequence see whats involved Only few tools parts needed addition few minutes time fuse shown standard automotive ATC type available auto supply store Radio Shack available wide range ratings described simple numbers like 15 20 numbers current rating amperes beyond fuse will blow open circuit Such fuses plug very nicely standard elec trical disconnects also shown latter parts also readily available var ious styles same stores type pictured favorite choicecomes built-in par tial plastic insulator Continued page 135 ATT-CHEIC7 ON-Board Battery Tester Saves Time. Saves Models BAiTCHEK RX-1 $1495 ade USA NEW Install RO Models Check receiver battery status press button Small Light 1/2 oz Precise Rugged ORDER TODAY dealer Protune Corp 914 462-6452 PO Box 1808 Poughkeepsie NY 12601 New Fourmost Fillet Stop messing around gummy fillers sticky putties Use Fourmost Fillet get clean perfect contour hassle Fourmost Fillet continuous strip vinyl preformed make perfect fillet Fillet may easily installed cyanoacrylate adhesives can finished either paint iron-on materials Fourmost Fillet also perfect wing saddle seats 2 sizes small No 128 Fourmost medium No 129 Price 4 feet $350 Products 4040 24th Ave Forest Grove OR 97116 503 357-2732 March 1988 39 thats needed add safety fuse new existing Electric installation Wire shown Joiners 16-gauge Crimp terminal color-codes matched wire sizes Plier type tool left wire cutterlstripper Mid dle connector-cruncher Grunt Squeeze hard crimping tool handle presto super electrical mechanical bond made between wire terminal No need solder either N KL5] TOLED~ 040 TN RTY-FOU RTH ANNUAL RADIO CONTROL EXPOSITION APRIL 8 910 1988 FRIDAY9amto6pm SATURDAY9amto6pm SUNDAY9 am 430 pm TOLEDO SPORTS ARENA ONE MAIN STREET TOLEDO OHIO ADVANCED TICKETS may ordered sending self-addressed business size 4Vsx9 envelope TICKETS 38235 Castle Romulus Ml 48174 orders above 5 tickets must include extra postage US orders must include 25 cents per order handling charge foreign orders must include 50 cents per order handling charge need send addressed envelope will provide necessary postage Include check money order US funds made payable Weak Signals R/C Club Ticket prices $400 per day adults $100 per day children 12 under Please specify number Deadline ticket orders March 31 1988 sales final non-refundable orders will returned mid-March have included adequate postage will also contain program TICKETSAREALSOA VAILABLEA T THE DOOR Will Have Traditional Saturday Night Auction COMPETITION CLASSES NON-MILITARY SPORT SCALE PLANE IAMA Rules MILITARY SPORT SCALE PLANE IAMA Rules PRECISION SCALE PLANE AMA Rules PAUERN PLANE SPORT MONO-PLANE non-scale models SPORT 81-PLANE non-scale models onlyl OLD TIMER FREE FLIGHT R/C ASSIST R/C SAILPLANE non-scale models HELICOPTER R/C CAR COMPETITION BOAT MILITARY SCALE BOAT PLEASURE POWER BOAT WORKING VESSEL-UNARMED said days acquiring hard-won proficiency method better rank beginner can see aircraft turn ing downwind base turn its final legs coming lands would have useful Some other experienced pilots group werent easily satisfied needs elevator response Dave Kep harts reaction Perhaps bigger fan Another suggested bigger box glassed model inside comments escalated course defended homely brain child Heck after its Simple Simulator beginners can made almost no cost' Ah well cant win general response among BAM membership basically positive new ideas already sprouting Well line shack finished power could keep field demo Eric Rustand student Glider building class now regu larly attending club member last word wish Id chance try out soon Glider finished learn hard way poor old Gentle Lady looks pretty beat up make Simple Simulator club line shack hobby store ga rage attic non-RCer friend can enjoy next-best thing real thingwithout having get insur ance first RC Electrics/Kopski Continued page 39 final item needed some heat-shrink tubing prefer Du-Bro part number 439 hobby shop tubing has unshrunk diam eter yellow color Installing fuse connectors very easy ex isting fuseless installations select system wire preferably battery wire location close battery cut should obvious safety reasons such work best done installation battery deador near ly own installations have standard ized put fuse positive battery wire negative lead will just well Carefully strip insulation off wire cut being careful cut nick wire strands Also dead battery notwithstand ing never really take care inad vertently touch exposed battery terminals new wire ends Now twist newly exposed strands together fingers Insert exposed wire end terminal crimp wire-tube part terminal pictured sure use proper notch jaw crimping toolthis identified either wire gauge number color dot Read directions come tool electrical disconnect shown blue insulator sleeve blue-coded notch tools jaw used Blue code color indicates wire size case 16- 14-gauge wire Red 22- 18-gauge wire thats needed good job hefty squeezereally pour arm muscle assure deep very tight crimp Remove crimping tool carefully examine crimped dead 4 m $1400 m U battery U U pack.I U .a dead $30000 airplane prevent this. Voltruaster sophisticated precision vobmeter accurate expensive laboratory unit can confident readings gives true Unique features include -Four voltage ranges -Load Engage switch important determining cell condition -Load Status switch two different loads 200 ma 500 ma March 1988 135 26K18 Voltmaster Kit 26K18C $2795 $3795 presented Weak Signals R/C Club Toledo Ohio r IrU3La5 I.umpieie catalog II I I 116wl9thSLpoBac5llcUHIsalnuvaIeMo 65037 Phcuu 816 584-7121 L sand sand get humps bumps Try Easy SanderTM ami See Difference Made select wood extremely light sander hold full sheet sand paper Flat sanded accurate sanding surface Large flat surfaces sanding area LH 1505555 ex get shaky field isnt long enough Try Easy Drake TM See Difference Extremely easy install Hard find spring stool fiher washers Braking action remains constant during repeated hate install hinges Try Easy HingesTa See Difference single slot few drops C/A glue its done No going pinning hinge pins ts worry ahout lncredihly strong Virtually indestructihle useLO 100 24 hinges $2 55 ea S Three sizes 118 5/32 3116LH 140 141 142 OOuea Zn EMY5RNUER .e EA5YHRRKE0Z EAYHINUL TM TMTMP0 Box 1743 Marcos CA 92069 wire joint wiggling tugging wire little make sure its well captured crimped terminal Now comes really neat part Slip 3A-in length A-in Du-Bro heat-shrink tubing over terminal end tubing flush slightly extendingabout %2 beyond terminal end Carefully heat tub ing electric covering gun keeping hot airstream moving around tubing diameter seconds tubing will begin shrink will eventually form tightly around terminal shown Presto now have compact nice ly insulated fuse terminal some options exact proced ures First disconnects can purchased crimpable built-in partial insulators wire can simply soldered instead being crimped case somewhat longer piece heat-shrink tubing should used should extend very front terminal way back over about / wire sulation itself Another option purchase such terminals built-on plastic hoods already cover entire terminal quite bit bulky shown dont use reason further disadvantage type disconnect fuse fits bit THERE E NO SECRETS LIQUID FINISHES MASTER MODELING DESIGNING SCRATCH BUILDING loosely connection cannot tightened easily Ordinarily using connectors sulated heat-shrink tubing loosely fitting fuse can corrected removing fuse light ly squeezing disconnects two curled teeth pliers reinstalling fuse cant plastic-hooded connectors out cracking hood Choose fuse rating suited system plug both new wire termi nals just added youve got new level safety thats well worth small cost little time takes make personal choice 20-amp fuse Astro cobalt super ferrite motors 15 amps economy motors Related reading photos can found 1987 issues Model Aviation dated May June August September Folders photos shows personal collection K&W folding props Electrics No havent yet used look just great Im planning extensive se rtes test runs future meantime few highlights fine large growing line props Most various blade sizes shown except very smallest six-inch ones fit TOMS 7ECH8 MONOKOTING FLWNG AROUND 0 OLD TIME U CONTROL ALL ABOUT ENGINES MORE COMING S1O95 EACH HARRY B HIGLEY & SONS INC P 0 BOX 532 GLENWOOD ILL 60425 same two larger hub sizes shown blades molded fiberglass individually available readily replaceable hubs Isnt great able get replacement parts blades hubs designed blades fold forwardsomething anyone has happened upon startup will appreciate Also hubs rugged come ready-bored A-in shafts makes very nice use largest gear drives know A-in bore still has plenty hub metal around making what looks like great product design present props manufactured K&W 7824 Lexington Ave Philadelphia PA 19152 Plans under way Sonic-Tronics produce designs volume future meantime Tom Kerr head fan-maker will happy discuss product line fill orders Motor improvements Whenever Im aware new products product improvements try pass info along everyone photo shows such improvement Astro prod uct line Pictured old new Astro co balt 15 brushes removed No tice has relatively large brushes brush holders protrude farther case newer version brush size crease makes durable motor capable handling higher currents longer periods time Also reason brush holders protrude farther case commutator also largeranother improvement currenthandling ability have two cases bigger really better just ya know last clearly tIne best yet has really excited Ive often lamented about smalldiameter shafts gear drives LOTS local fliers MANY readers column constantly experiencing bending brealcing small-diameter gear-drive output shafts routine failure gear ausembly housings minor rough landings problem par ticularly case economy setups modelers using low-cost 05 systemsbut paying heavily gear assembly upkeep Well Im very happy report days may gone forever Heres just received some new Astro gear drives Part No 4046 designed fit As tro 02 035 cobalt motors gear ratio 2381 use same rugged metal hous ing heavy all-metal gears Astro 05/15 drives same RUGGED A-in output shaft 136 Model Aviation PRACTICAL SIZED GIANT SCALE MODELS NICK ZIROLI Jets too OC-3lA 1140 Span$4200 F4U CORSAIW2 193 Span$3000 ASMS ZERO2A 191 Span$3000 CuRTISP402A 194 Span$3000 AT-e TEXAN24 1101 Span$3000 F5F BEARCAT2A 186 Span$3000 FOKKERDR-127 183 Tripe$2700 Canopies Available Plans Sent Post-Paid within USA Send 5O Full Catalog Balsa Order Nick Ziroli 29 Edgar Dr Smithtown NY 11787 USA BUT come -in-bore pinion gear have mounting hole locations allow used ferrite OSs means can replace troublesome smallshafted reducers real brute keep us ing motor have cost $35 list may seem high really notjust soon damage parts economy drives have get replacements Astro drive heavier additional weight quickly forgot ten can actually continue flying after making landing after landing Finally youre tired good ol ferrite 05 can use drive its intended purpose 02/035 cobalt strongly recommend product consideration Coming future columns Im personally very big so-called 15 -size motors may want motors other Also test runs Astro 4fl46 drive some ferrite OSs varied props Please forward comments questions SASE please address listed beginning column HAPPY SILENT POWERED FLIGHT RC AerobaticsNan Putte Continued page 41 featured wings Both wings have same span chord wing area same equal-weight airplanes wing loadings would same bottom wing has substantial sweepback would exhibit dihedral effect result sweepback less dihedral would required aerodynamic center top wing about one-fourth wing chord back leading edge aerodynamic center bot tom wing almost trailing edge root chord means order get same longitudinal pitch lateral yaw characteris tics two airplanes swept-wing de sign would probably need longer tail moment and/or larger horizontal vertical tail surfaces addition center-of-gravity sweptwing design would further aft differences would expect find example demonstrates relatively simple change design can cause significant changes other parts airplane Lets try Figure 2 shows two differ ent kinds rudders same airplane Which likely create yaw roll youre trying Stall Turn air plane fly Knife Edge want pure yaw input rudder Rolling messes up maneuver Which rudder did pick Pattern airplanes likely have rudders like top because effective point applica tion force rudder deflected near bottom rudder means little no rolling moment will generated about axis fuselage other hand rudder bottom sketch will have great deal rolling moment generated rudder deflected wont see rudders like good designs Ill print kind design information now again theres interest Please let know responding advertisers mention read about ModelAviation used substrate build other types finish dacron polyester heat-shrink materi al similar Ceconite Stitts Poly-Fiber full-size aircraft Its advantages long life toughness resistance puncture tearing accepts paint dope quite light requires oniy minimum finish also contributes lightness has no adhesive fabric models framework given two three coats dope sanding lighdy between coats remove balsa fuzz Use enough dope thinner promote easy brushing since thinner evap orates does nothing towards building coating Any brush will serve preference sable long stralght hairs work dope balsa especially first coat ap ply dope surface will come con tact fabric including rib edges Koverall cut its grain running direction long dimension area covered Grain direction hard detect package tells find grain direc tion runs diagonally across wing example shrinkage will likely cause warp structure wing panel cut piece Koverall about two inches wider three four inches longer wing prefer cover wing halves starting center stretching fabric wards tip Lay Koverall bottom wing Brush strip dope about t/a thinned about 10% across wing Continued page 140 Specifications Wingspan 44 Wuight9A bs Power RK-740 Kit Includes Machine Cut Sanded Balsa Ply Foam Parts Full Size Rolled Plans Instruction Guide Necessary Hardware 2240711 9 Houston TX 77227 shipping 713 621-1462 March 1988 137 RC Scale/Wischers Continued page 43 E Tactical High Alt itude __The end Zij NA SAWSfamous line hobby saws Replacement Blades available dealer PAl Model Supply Razor #200 $288 Universal #500 P0 Box 3967 Torrance CA 90610 HOBBYPOXY TRUE TWO-PART EPOXY PAINTS 16 COLORS R ER EPOXY GLUES FOUR FORMULAS 5-MIN ID 45-MIN FAST FILL GRAIN FILLER QUICK-PREP POLYESTER RESIN FREE COLOR CARD AND BROCHURE Homeypoxy DIVISION PeltS Paint Company lac 36 Pine Street Rockaway NJ 07866