FREE FLIGHT INDOOR U 417 LARRY COSLICK last years USIC Larry Coslick seemed appear out nowhere post some really good times no accidentLarry works really hard develop skills will hear about several techniques space permits meanwhile offers following concept food thought about no touch Easy B contest would interesting might flown rounds starting five- eight- 10- 11- 12-minute goals Allow two attempts target time model touches ceiling disqualified Also two events could held models lighter 07 grams other heavier models Any takers Flying opportunities OhioCleveland area Weekly sessions year-round Category sites site Willoughby Andrews School has 20-foot flat ceiling 60 x 80-foot floor area other site Meridian Euclid Hospital Euclid has 195-foot ceiling 45 x 70-foot floor area Contact Vein Hacker 25599 Breckenridge Dr Euclid OH 44117-1807 Tel 216 486-4990 CaliforniaBurbank Blacksheep Exhibition Squadron VMF-2 14 has monthly sessions second Fridays flying Category site Luther Burbank Middle School 7-10 pm Tony Naccarato 2121 N Hollywood Way Burbank CA 91507 Tel 818 842-5062 MarylandGoddard Space flight Center Record trials flying sessions scheduled auditorium Building 8 Goddard Saturdays 11 am until 1030 pm June 26 July 17 September 11 25 October 9 23 November 6 1993 Sanctioned national FM record trials September 11 25 October 9 23 November 6 NASA security requires attendees US citizens AMA members license available inspection gate list compiled Tom Vallee must notify Tom intent attend advance meet Changes NASA launch schedules other possible events can preempt use auditorium much warning sure verify date Tom before leaving home Tom Vallee 444 Henryton South Laurel MD 20707 Tel 301 498-0790 New JerseyLakehurst New dates Lakehurst #1 began May 1-2 weekend Other dates August 7-8 14-15 21-22 28-29 September 4-6 11-12 18-19 25-26 Oct 2-3 9-10 17 24 Contact Gary Underwood address shown below make necessary arrangements access Lakehurst NAS Attendance Lakehurst meets requires strict adherence rules 1 You must furnish name drivers license number make model vehicle license plate number state registration* Gary Underwood later Wednesday before meet plan attend 2 Obey military regulationsespecially speed limits no-smoking areas restricted parkingall clearly posted 3 Certain base personnel give access lavatories other facilities Please route requests assistance through CD 4 You absolutely must leave flying area least clean find check CD about locate equipment 5 No photos allowed except hangar *OutofAown participants fly rent cars must make special arrangements regarding auto identification Contact Gary Underwood 9 Treelawn Terrace Mercerville NJ 08619 Tel 609 586-3202 information Built-up booms mid-1960s experimented built-up tail booms spite apparently difficult job constructing built-up booms strong advantages light weight superior strength excellent field-repair possibilities working carefully able make competitive-weight tail booms despite having wood suitable rolled booms resulting booms strong enough lift whole stick/boom assembly holding September 1993 105 Heres example early built-up boom style used Slithery Dee Fl D model Tenny photo new boom design uses Keviar place mangled boom built-up boom balsa bracing mounts using pegs easily repaired spite serious sockets Tenny photo damage John 1 Horton photo boom repair has completed Look closely see wood splice replacing part longeron Tenny photo clip-on magnifier Edmund ScientificThe Keviar tow gets really scrambledP41750 helps viewing Keviarlooking after several strands have strands Tenny photoremoved Tenny photo SHIPPING & HANDLING UPS Ground Continental US $495 UPS Air & Parcel Post $495 plus 10% ot Subtotal Continental US UPS Nest Day Air $1400 plus $100 per lb ot Shipment total 000 add $395 Foreign Orders Parcel Post Air $495 ot Subtotal US Mail $495 plus 10% ot Subtotal boom Typical repair time severe flight damage hour less retaining models trim photo shows boom employed Slithery Dee first 65cm FiD method join stick boom Figure 1 sketch showing details construction used days 00004 inches diameter became available same basis Hard see Most indoor bracing materials difficult see lightweight wire perhaps hardest followed single strands 00004-inch Kevlar contrast 0001-inch Dacron glows brightly Figure 1 Close-up details early built-up boom construction latest boom design last few years havent really good wood booms built old design werent strong stable earlier booms Adding boron longerons helped also wanted control torsional rigidity flying stab used Pennyplanes requires less torsional strength boom stab tilt can adjust automatically Thanks inventive genius Don Lindley new design concept seems have solved problems photo shows section new boom mounting new boom removable three hardwood pegs sliding tissue tubes Also note Kevlar strands replace balsa crosspieces originally used torsional strength prototype boom has test-flown excellent results in-flight accident necessitated field repairs Happily new design lost nothing repairabilitythe models next flight after serious repairs duplicate flight before wreck photo shows model right after wreck another shows close-up repaired boom pointer indicates section repairs made Plastic filament bracing Although various types very thin wire have traditionally used model bracing Kevlar Dacron filaments have used some fliers recent years Several years ago monofilament Dacron 0001 inches diameter available free request recently Kevlar fibers approximately properly placed lighting recently worked intensively Kevlar ttying find what takes 60-plus-year-old eyes see solution simply proved no substitute raw horsepower 50-watt halogen prefocused floodlight proved answer distance four feet lamp makes hard white circle about 30 inches diameter makes 00004inch Kevlar glow Filament separation Both Dacron Kevlar come bundle called towwith approximately 250 strands per tow separating individual strands first few difficult high output light need magnifiers see photo isolate individual strands pull multiple strands four time bundle about four feet length begin separation big light shining over shoulder After isolating group strands coat end strand group very diluted highly plasticized glue attach piece tape serve anchor handle group Pulling first few groups requires care after several groups have separated much easier group anchored tape pull bundle about two inches down group causing bundle hump up make successive pull very slowly below hump repeat process until group completely separated Continued page 132 106 Model Aviation -rIAi Ecs LEA/ CTH S S/Dc VIEu L V T sit RACwOMIUTAAY REAL MACRAFT HAVE PILOTS DOES YOURS OURS HAVE 30 YEARS EXPERIENCE MOLDED FLESH COIOfl READY TO PAINT & GO FLYING SEND SASE FOR ILLUSTRATED ORDER FORM WILLIAMS BROS INC 161 PAWNEE SAN MARCOS CA 02060 - ERS really know what youre doing MODEL SAILPIANES MYTH MAGIC Tony Upso no Math either Laymen Wives Lovers 170 readable pages $1895 plus $300 S&H Beefsteak Mines Ltd Box 1645 Jackson WY 83001 FAX 307 733 7153 write fax brochure FF Indoor/Tenny Continued page 106 After several groups have stripped out bundle looks like mess see photo loose bundle releases groups very easily After group has separated coat thumb forefinger diluted glue pull strands through glue until whole group coated unified large strand move tape storage area long slender box makes excellent safekeeping storage container strength iameter 3 174 Dacron stretches under stress recovers slowly Kevlar has low stretch Kevlar brittle sensitive bending around small-diameter corner Both materials bond very well normal modeling cements better wire bonded multistrand groups will respond hasnt proven yet four-strand Kevlar groups exceptionally easy brace Repairs Repairing Dacron Kevlar bracing much easier other materials wing stab bracing has stripped off apply covering patch new segments plastic bracing can easily spliced 45 174268 Figure 2 Possible plastic filament bundles showing strength relative diameter entire bundle can reduced sitting using frosted transparent tape possible write down number strands group different-sized groups can made later identified impossible count strands after coating individual groups look identical unless very large number strands included strands Multistrand groups work best certain groupings Figure 2 shows configurations three- four- seven-strand groups inherently stable possibly form automatically five-strand group also likely formation figure also shows estimated diameter ratio base strand diameter Note tensile strength group proportional number strands group diameter larger some ratio ranging about 16 about 27 times base diameter Groups three strands much visible kind wire Bracing plastic strands general bracing plastic same wire except visibility factor Choosing whether use Dacron Kevlar fairly simple unbonded single strands remaining bracing Simply place end new strand next existing bracing brush thin glue along two strands Wrap-up have seen Keviar stored paper cylinders drink cans adequate except thing Some kind tape commonly used anchor both ends tow during storage almost inevitably leads few strands being stuck together As result tow wont separate cleanly unless adhesive can cleaned off dont yet have tested suggestion perhaps pressure-sensitive materials will have adequate adhesion leaving residue strands Kevlar tow available sending SASE Rich Doig 6 Canary Hill Dr Orion MI 48359 Similarly 0001-inch Dacron available Bud Tenny PO Box 830545 Richardson TX 75083 SASE included request Teflon tape Jim Clem suggests plum bers Teflon tape ideal keep laminated parts sticking forms tape used seal joints pipe flexible enough wrapped pipe threads resist tearing joints assembled Jim coats forms contact cement stretches Teflon tape over form rubs 132 Model Aviation attfoils dotrnatrtx printer with.. FOILED AGAIN! PLOT AIRFOHS IN ANY CHORD UP TO 24 INCHES MODIFY THICKNESS CAMBER & TRAJUNG EDGE PLOT SKIN ThICKNESS FOR SHEErED WINGS ENTER DATA EASILY VIA INTELLIGENT EDITOR USERFRIENDLY MENU-DRIVEN OPERATION INCLUDES 50 AIRFOIL FILES 26-PAGE USER MANUAL $4500 M h.k dA Gh ifp& pa y lg qind sir 3F difli Sd hifk f CYGNET Software 619 792-8021 3525 Del Mar Heights #23Th San Diego 92130 SAMS MODELS England NEW SCale Free Flight Kits ~WARBIRD* SPITFIRE MK 22/24 24.1/2 $1995 also available Westland Widgeon 24-4 $1495 Hawker Super Fury 21 1/2 2195 add $7 airmail SAMS Chapel Sandon Buntingford Herts SG9 OQJ England GASPARIN C02 Motora now SAMS Note us Checka & Stampa valid uK VISA & Maatercard accepted $-billa LATHES FOR THE MODEL AVIATOR KUEBIPSE U MICHhUE & mc 72-6500 iEi3F CTNL0G $100 FOAM CORE FLOATS FOR AIRPLANES AND HELICOPTERS V HULL FLOATS FOR 430 POUND AIRPLANES CHOOSE FROM PLANS KITS OR READY TO PAINT ALSO FLOATS FOR 4ID POUND HELICOPTERS AMSOIL SYNTHETIC OIL DEALER SEND SA SF FOR FLOAT OR OIL LITERATURE KIRCHER R/C PRODUCTS INC 9 SHEFFIELD WAY CLARK NaJ 07066 down result surface repels types adhesive use Laminated ribs As reported previously have laminating indoor model parts latest difficult project has wing stab ribs Early attempts yielded ribs sometimes relaxed lower camber intended laminated two strips using same diluted white glue discussed before After talking Andy Tagliafico says laminated ribs bulletproof tried three-strip laminations new Inter mediate Stick wing used both Duco cement white glue laminate three strips 0017-inch balsa Except white glues slower drying time approximately equal results both glues None ribs relaxed two methods produced ribs about same weight Andy uses Duco cement thinned 50% preglues top bottom strip top middle strip assembly time brushes acetone strip brushing shape male 12-Volt RacklHerbert Continued page 23 top battery Make sure least inch wood handle must strong enough hold weight whole assembly attached cigarette lighter receptacle 12-volt battery could easily plug 12-volt soldering iron field repairs spotlight night flying 5 VDC silicon solar cell trickle-charges 12-volt source battery feet screwed 1 1/2-inch wood screws supported angle braces feet have small sliding casters keep 12-volt battery off ground chargers placed side rack batteries other side meter located near battery being charged easy monitoring peak voltages batteries attached Velcro boxes mounted hold discharged batteries extra wiring marked box dead know glance what charged what isnt have added blinking LED indicator on-off switch 15-amp fuse assure safety system remind shut everything down return home finish charging shut off main power switch still have Ni-Cd battery hooked chargers LED will continue blink form After third strip laid up uses female form apply pressure rib acetone evaporates bonding strips together Andy uses two refinements basic technique First strip sanded thinner ends produce banana rib Also rib built using strips wider rib width needed sanded width after gluing Boron sandwich Stan Chilton uses another sort laminated rib new FlF modelseach rib thin strip balsa boron top bottom Stan also uses male female forms balsa strip placed female form boron glued rib Next rib placed male form second piece boron attached ribs light length sufficiently strong prevent airfoil deflecting under flight loads Such special ribs lead maximum five ribs FiD wing Andy Tagliafico expects five ribs seven inches long weigh no 0003 ounces ds reverse current flow great warning remind unhook batteries high-power diode could installed like warning feature also made chart rates times battery charger takes 12-volt battery PowerSonic Redwood City California rated 30 Ah has lasted through all-day flying sessions Ive make 12-Volt Rack chargers too Its great way keep things organized great way carry thing flying field may have make modifications equipment will find easy way carry stuff rack 28 inches long nine inches high battery holders 5 x 9 inches Some companies mentioned International RC Service PO Box 1643 San Juan Capistrano CA 92693 IRCS milliamp analyzer Astro Flight 1311 Beach Ave Marina Del Ray CA 90292 Parts List 12-Volt Rack 1 ea28 x 9 x vertical rack 2eaSx9xpineforfeet 8 eabase angle braces feet battery box mounts 1 pkgVelcro strips 1 eaRadio Shack green red blinking LED HXS SEKVU etc k-UK OLDER RADIO UPDATES WE HAVE OVER 26 YEARS EXPERIENCE IN 1C AT WE 1466 windward dr mason ohio 45040 ph 513 398-5423 September 1993 133 SUNGLASSES 5 100% VV Protection Shatterproof Excellent Optical Quality Tints Fit Over Prescriptions SKyS RO BOX 1000 DUMFRIES VA 22026 800-227-9318 visaBJrn/C ELECTRONICS CTT Rubber ft Engine Power Free Flight Diepley Control Line Eiectric Power RfC Airplanee new liluetreted 32 page tebiold size cetelog US ft Canede $100 Foreigh $300 Penn Valley Hobby Center 837-A W Main SI Lanedale PA 19446 215 3U4775 B/C Combat Gremlin RCM 12/92 Affordable Custom Cores Modeters Modelers Official supplier SIC Combat Gremlin wing cores Gremlins Cores $12 Shoes kits $20 templates no wood Full kits wood $35 Combat newsletter short/full kit Upgrade glider intrnssediate level new wing S3O2t SD7037 Gentle Lady Spirit 2M full wing kits $35 Sems-symesrical 25 Quickee 500 cores $8 pre pair Alt orders odd $5 S&H CODs odd $6 additional Let us cut next club project Custom core quantity discounts RA Cores po Sos 863 Southbridge MA 01550 508 765-9998 FLYROD $69 & H Span51 790 sc.in 32-40 Radio 4 ch ht 2 2 1/2 lbs. Ultimate Fun-Fly Machine udes covering & Hardware pkg. throttle flights NO flutter s Best qm Orders Call 1-800-645-KITS Information eCu aea445-1 122 P0 Bun 771 GENERIX Eant wIndsor NJ 0a520 Tomorrows Kits Affordable Prices Write Free Catalog $500 COD Custom Kit Cutters s Anyone Elses
Edition: Model Aviation - 1993/09
Page Numbers: 105, 106, 132, 133
FREE FLIGHT INDOOR U 417 LARRY COSLICK last years USIC Larry Coslick seemed appear out nowhere post some really good times no accidentLarry works really hard develop skills will hear about several techniques space permits meanwhile offers following concept food thought about no touch Easy B contest would interesting might flown rounds starting five- eight- 10- 11- 12-minute goals Allow two attempts target time model touches ceiling disqualified Also two events could held models lighter 07 grams other heavier models Any takers Flying opportunities OhioCleveland area Weekly sessions year-round Category sites site Willoughby Andrews School has 20-foot flat ceiling 60 x 80-foot floor area other site Meridian Euclid Hospital Euclid has 195-foot ceiling 45 x 70-foot floor area Contact Vein Hacker 25599 Breckenridge Dr Euclid OH 44117-1807 Tel 216 486-4990 CaliforniaBurbank Blacksheep Exhibition Squadron VMF-2 14 has monthly sessions second Fridays flying Category site Luther Burbank Middle School 7-10 pm Tony Naccarato 2121 N Hollywood Way Burbank CA 91507 Tel 818 842-5062 MarylandGoddard Space flight Center Record trials flying sessions scheduled auditorium Building 8 Goddard Saturdays 11 am until 1030 pm June 26 July 17 September 11 25 October 9 23 November 6 1993 Sanctioned national FM record trials September 11 25 October 9 23 November 6 NASA security requires attendees US citizens AMA members license available inspection gate list compiled Tom Vallee must notify Tom intent attend advance meet Changes NASA launch schedules other possible events can preempt use auditorium much warning sure verify date Tom before leaving home Tom Vallee 444 Henryton South Laurel MD 20707 Tel 301 498-0790 New JerseyLakehurst New dates Lakehurst #1 began May 1-2 weekend Other dates August 7-8 14-15 21-22 28-29 September 4-6 11-12 18-19 25-26 Oct 2-3 9-10 17 24 Contact Gary Underwood address shown below make necessary arrangements access Lakehurst NAS Attendance Lakehurst meets requires strict adherence rules 1 You must furnish name drivers license number make model vehicle license plate number state registration* Gary Underwood later Wednesday before meet plan attend 2 Obey military regulationsespecially speed limits no-smoking areas restricted parkingall clearly posted 3 Certain base personnel give access lavatories other facilities Please route requests assistance through CD 4 You absolutely must leave flying area least clean find check CD about locate equipment 5 No photos allowed except hangar *OutofAown participants fly rent cars must make special arrangements regarding auto identification Contact Gary Underwood 9 Treelawn Terrace Mercerville NJ 08619 Tel 609 586-3202 information Built-up booms mid-1960s experimented built-up tail booms spite apparently difficult job constructing built-up booms strong advantages light weight superior strength excellent field-repair possibilities working carefully able make competitive-weight tail booms despite having wood suitable rolled booms resulting booms strong enough lift whole stick/boom assembly holding September 1993 105 Heres example early built-up boom style used Slithery Dee Fl D model Tenny photo new boom design uses Keviar place mangled boom built-up boom balsa bracing mounts using pegs easily repaired spite serious sockets Tenny photo damage John 1 Horton photo boom repair has completed Look closely see wood splice replacing part longeron Tenny photo clip-on magnifier Edmund ScientificThe Keviar tow gets really scrambledP41750 helps viewing Keviarlooking after several strands have strands Tenny photoremoved Tenny photo SHIPPING & HANDLING UPS Ground Continental US $495 UPS Air & Parcel Post $495 plus 10% ot Subtotal Continental US UPS Nest Day Air $1400 plus $100 per lb ot Shipment total 000 add $395 Foreign Orders Parcel Post Air $495 ot Subtotal US Mail $495 plus 10% ot Subtotal boom Typical repair time severe flight damage hour less retaining models trim photo shows boom employed Slithery Dee first 65cm FiD method join stick boom Figure 1 sketch showing details construction used days 00004 inches diameter became available same basis Hard see Most indoor bracing materials difficult see lightweight wire perhaps hardest followed single strands 00004-inch Kevlar contrast 0001-inch Dacron glows brightly Figure 1 Close-up details early built-up boom construction latest boom design last few years havent really good wood booms built old design werent strong stable earlier booms Adding boron longerons helped also wanted control torsional rigidity flying stab used Pennyplanes requires less torsional strength boom stab tilt can adjust automatically Thanks inventive genius Don Lindley new design concept seems have solved problems photo shows section new boom mounting new boom removable three hardwood pegs sliding tissue tubes Also note Kevlar strands replace balsa crosspieces originally used torsional strength prototype boom has test-flown excellent results in-flight accident necessitated field repairs Happily new design lost nothing repairabilitythe models next flight after serious repairs duplicate flight before wreck photo shows model right after wreck another shows close-up repaired boom pointer indicates section repairs made Plastic filament bracing Although various types very thin wire have traditionally used model bracing Kevlar Dacron filaments have used some fliers recent years Several years ago monofilament Dacron 0001 inches diameter available free request recently Kevlar fibers approximately properly placed lighting recently worked intensively Kevlar ttying find what takes 60-plus-year-old eyes see solution simply proved no substitute raw horsepower 50-watt halogen prefocused floodlight proved answer distance four feet lamp makes hard white circle about 30 inches diameter makes 00004inch Kevlar glow Filament separation Both Dacron Kevlar come bundle called towwith approximately 250 strands per tow separating individual strands first few difficult high output light need magnifiers see photo isolate individual strands pull multiple strands four time bundle about four feet length begin separation big light shining over shoulder After isolating group strands coat end strand group very diluted highly plasticized glue attach piece tape serve anchor handle group Pulling first few groups requires care after several groups have separated much easier group anchored tape pull bundle about two inches down group causing bundle hump up make successive pull very slowly below hump repeat process until group completely separated Continued page 132 106 Model Aviation -rIAi Ecs LEA/ CTH S S/Dc VIEu L V T sit RACwOMIUTAAY REAL MACRAFT HAVE PILOTS DOES YOURS OURS HAVE 30 YEARS EXPERIENCE MOLDED FLESH COIOfl READY TO PAINT & GO FLYING SEND SASE FOR ILLUSTRATED ORDER FORM WILLIAMS BROS INC 161 PAWNEE SAN MARCOS CA 02060 - ERS really know what youre doing MODEL SAILPIANES MYTH MAGIC Tony Upso no Math either Laymen Wives Lovers 170 readable pages $1895 plus $300 S&H Beefsteak Mines Ltd Box 1645 Jackson WY 83001 FAX 307 733 7153 write fax brochure FF Indoor/Tenny Continued page 106 After several groups have stripped out bundle looks like mess see photo loose bundle releases groups very easily After group has separated coat thumb forefinger diluted glue pull strands through glue until whole group coated unified large strand move tape storage area long slender box makes excellent safekeeping storage container strength iameter 3 174 Dacron stretches under stress recovers slowly Kevlar has low stretch Kevlar brittle sensitive bending around small-diameter corner Both materials bond very well normal modeling cements better wire bonded multistrand groups will respond hasnt proven yet four-strand Kevlar groups exceptionally easy brace Repairs Repairing Dacron Kevlar bracing much easier other materials wing stab bracing has stripped off apply covering patch new segments plastic bracing can easily spliced 45 174268 Figure 2 Possible plastic filament bundles showing strength relative diameter entire bundle can reduced sitting using frosted transparent tape possible write down number strands group different-sized groups can made later identified impossible count strands after coating individual groups look identical unless very large number strands included strands Multistrand groups work best certain groupings Figure 2 shows configurations three- four- seven-strand groups inherently stable possibly form automatically five-strand group also likely formation figure also shows estimated diameter ratio base strand diameter Note tensile strength group proportional number strands group diameter larger some ratio ranging about 16 about 27 times base diameter Groups three strands much visible kind wire Bracing plastic strands general bracing plastic same wire except visibility factor Choosing whether use Dacron Kevlar fairly simple unbonded single strands remaining bracing Simply place end new strand next existing bracing brush thin glue along two strands Wrap-up have seen Keviar stored paper cylinders drink cans adequate except thing Some kind tape commonly used anchor both ends tow during storage almost inevitably leads few strands being stuck together As result tow wont separate cleanly unless adhesive can cleaned off dont yet have tested suggestion perhaps pressure-sensitive materials will have adequate adhesion leaving residue strands Kevlar tow available sending SASE Rich Doig 6 Canary Hill Dr Orion MI 48359 Similarly 0001-inch Dacron available Bud Tenny PO Box 830545 Richardson TX 75083 SASE included request Teflon tape Jim Clem suggests plum bers Teflon tape ideal keep laminated parts sticking forms tape used seal joints pipe flexible enough wrapped pipe threads resist tearing joints assembled Jim coats forms contact cement stretches Teflon tape over form rubs 132 Model Aviation attfoils dotrnatrtx printer with.. FOILED AGAIN! PLOT AIRFOHS IN ANY CHORD UP TO 24 INCHES MODIFY THICKNESS CAMBER & TRAJUNG EDGE PLOT SKIN ThICKNESS FOR SHEErED WINGS ENTER DATA EASILY VIA INTELLIGENT EDITOR USERFRIENDLY MENU-DRIVEN OPERATION INCLUDES 50 AIRFOIL FILES 26-PAGE USER MANUAL $4500 M h.k dA Gh ifp& pa y lg qind sir 3F difli Sd hifk f CYGNET Software 619 792-8021 3525 Del Mar Heights #23Th San Diego 92130 SAMS MODELS England NEW SCale Free Flight Kits ~WARBIRD* SPITFIRE MK 22/24 24.1/2 $1995 also available Westland Widgeon 24-4 $1495 Hawker Super Fury 21 1/2 2195 add $7 airmail SAMS Chapel Sandon Buntingford Herts SG9 OQJ England GASPARIN C02 Motora now SAMS Note us Checka & Stampa valid uK VISA & Maatercard accepted $-billa LATHES FOR THE MODEL AVIATOR KUEBIPSE U MICHhUE & mc 72-6500 iEi3F CTNL0G $100 FOAM CORE FLOATS FOR AIRPLANES AND HELICOPTERS V HULL FLOATS FOR 430 POUND AIRPLANES CHOOSE FROM PLANS KITS OR READY TO PAINT ALSO FLOATS FOR 4ID POUND HELICOPTERS AMSOIL SYNTHETIC OIL DEALER SEND SA SF FOR FLOAT OR OIL LITERATURE KIRCHER R/C PRODUCTS INC 9 SHEFFIELD WAY CLARK NaJ 07066 down result surface repels types adhesive use Laminated ribs As reported previously have laminating indoor model parts latest difficult project has wing stab ribs Early attempts yielded ribs sometimes relaxed lower camber intended laminated two strips using same diluted white glue discussed before After talking Andy Tagliafico says laminated ribs bulletproof tried three-strip laminations new Inter mediate Stick wing used both Duco cement white glue laminate three strips 0017-inch balsa Except white glues slower drying time approximately equal results both glues None ribs relaxed two methods produced ribs about same weight Andy uses Duco cement thinned 50% preglues top bottom strip top middle strip assembly time brushes acetone strip brushing shape male 12-Volt RacklHerbert Continued page 23 top battery Make sure least inch wood handle must strong enough hold weight whole assembly attached cigarette lighter receptacle 12-volt battery could easily plug 12-volt soldering iron field repairs spotlight night flying 5 VDC silicon solar cell trickle-charges 12-volt source battery feet screwed 1 1/2-inch wood screws supported angle braces feet have small sliding casters keep 12-volt battery off ground chargers placed side rack batteries other side meter located near battery being charged easy monitoring peak voltages batteries attached Velcro boxes mounted hold discharged batteries extra wiring marked box dead know glance what charged what isnt have added blinking LED indicator on-off switch 15-amp fuse assure safety system remind shut everything down return home finish charging shut off main power switch still have Ni-Cd battery hooked chargers LED will continue blink form After third strip laid up uses female form apply pressure rib acetone evaporates bonding strips together Andy uses two refinements basic technique First strip sanded thinner ends produce banana rib Also rib built using strips wider rib width needed sanded width after gluing Boron sandwich Stan Chilton uses another sort laminated rib new FlF modelseach rib thin strip balsa boron top bottom Stan also uses male female forms balsa strip placed female form boron glued rib Next rib placed male form second piece boron attached ribs light length sufficiently strong prevent airfoil deflecting under flight loads Such special ribs lead maximum five ribs FiD wing Andy Tagliafico expects five ribs seven inches long weigh no 0003 ounces ds reverse current flow great warning remind unhook batteries high-power diode could installed like warning feature also made chart rates times battery charger takes 12-volt battery PowerSonic Redwood City California rated 30 Ah has lasted through all-day flying sessions Ive make 12-Volt Rack chargers too Its great way keep things organized great way carry thing flying field may have make modifications equipment will find easy way carry stuff rack 28 inches long nine inches high battery holders 5 x 9 inches Some companies mentioned International RC Service PO Box 1643 San Juan Capistrano CA 92693 IRCS milliamp analyzer Astro Flight 1311 Beach Ave Marina Del Ray CA 90292 Parts List 12-Volt Rack 1 ea28 x 9 x vertical rack 2eaSx9xpineforfeet 8 eabase angle braces feet battery box mounts 1 pkgVelcro strips 1 eaRadio Shack green red blinking LED HXS SEKVU etc k-UK OLDER RADIO UPDATES WE HAVE OVER 26 YEARS EXPERIENCE IN 1C AT WE 1466 windward dr mason ohio 45040 ph 513 398-5423 September 1993 133 SUNGLASSES 5 100% VV Protection Shatterproof Excellent Optical Quality Tints Fit Over Prescriptions SKyS RO BOX 1000 DUMFRIES VA 22026 800-227-9318 visaBJrn/C ELECTRONICS CTT Rubber ft Engine Power Free Flight Diepley Control Line Eiectric Power RfC Airplanee new liluetreted 32 page tebiold size cetelog US ft Canede $100 Foreigh $300 Penn Valley Hobby Center 837-A W Main SI Lanedale PA 19446 215 3U4775 B/C Combat Gremlin RCM 12/92 Affordable Custom Cores Modeters Modelers Official supplier SIC Combat Gremlin wing cores Gremlins Cores $12 Shoes kits $20 templates no wood Full kits wood $35 Combat newsletter short/full kit Upgrade glider intrnssediate level new wing S3O2t SD7037 Gentle Lady Spirit 2M full wing kits $35 Sems-symesrical 25 Quickee 500 cores $8 pre pair Alt orders odd $5 S&H CODs odd $6 additional Let us cut next club project Custom core quantity discounts RA Cores po Sos 863 Southbridge MA 01550 508 765-9998 FLYROD $69 & H Span51 790 sc.in 32-40 Radio 4 ch ht 2 2 1/2 lbs. Ultimate Fun-Fly Machine udes covering & Hardware pkg. throttle flights NO flutter s Best qm Orders Call 1-800-645-KITS Information eCu aea445-1 122 P0 Bun 771 GENERIX Eant wIndsor NJ 0a520 Tomorrows Kits Affordable Prices Write Free Catalog $500 COD Custom Kit Cutters s Anyone Elses
Edition: Model Aviation - 1993/09
Page Numbers: 105, 106, 132, 133
FREE FLIGHT INDOOR U 417 LARRY COSLICK last years USIC Larry Coslick seemed appear out nowhere post some really good times no accidentLarry works really hard develop skills will hear about several techniques space permits meanwhile offers following concept food thought about no touch Easy B contest would interesting might flown rounds starting five- eight- 10- 11- 12-minute goals Allow two attempts target time model touches ceiling disqualified Also two events could held models lighter 07 grams other heavier models Any takers Flying opportunities OhioCleveland area Weekly sessions year-round Category sites site Willoughby Andrews School has 20-foot flat ceiling 60 x 80-foot floor area other site Meridian Euclid Hospital Euclid has 195-foot ceiling 45 x 70-foot floor area Contact Vein Hacker 25599 Breckenridge Dr Euclid OH 44117-1807 Tel 216 486-4990 CaliforniaBurbank Blacksheep Exhibition Squadron VMF-2 14 has monthly sessions second Fridays flying Category site Luther Burbank Middle School 7-10 pm Tony Naccarato 2121 N Hollywood Way Burbank CA 91507 Tel 818 842-5062 MarylandGoddard Space flight Center Record trials flying sessions scheduled auditorium Building 8 Goddard Saturdays 11 am until 1030 pm June 26 July 17 September 11 25 October 9 23 November 6 1993 Sanctioned national FM record trials September 11 25 October 9 23 November 6 NASA security requires attendees US citizens AMA members license available inspection gate list compiled Tom Vallee must notify Tom intent attend advance meet Changes NASA launch schedules other possible events can preempt use auditorium much warning sure verify date Tom before leaving home Tom Vallee 444 Henryton South Laurel MD 20707 Tel 301 498-0790 New JerseyLakehurst New dates Lakehurst #1 began May 1-2 weekend Other dates August 7-8 14-15 21-22 28-29 September 4-6 11-12 18-19 25-26 Oct 2-3 9-10 17 24 Contact Gary Underwood address shown below make necessary arrangements access Lakehurst NAS Attendance Lakehurst meets requires strict adherence rules 1 You must furnish name drivers license number make model vehicle license plate number state registration* Gary Underwood later Wednesday before meet plan attend 2 Obey military regulationsespecially speed limits no-smoking areas restricted parkingall clearly posted 3 Certain base personnel give access lavatories other facilities Please route requests assistance through CD 4 You absolutely must leave flying area least clean find check CD about locate equipment 5 No photos allowed except hangar *OutofAown participants fly rent cars must make special arrangements regarding auto identification Contact Gary Underwood 9 Treelawn Terrace Mercerville NJ 08619 Tel 609 586-3202 information Built-up booms mid-1960s experimented built-up tail booms spite apparently difficult job constructing built-up booms strong advantages light weight superior strength excellent field-repair possibilities working carefully able make competitive-weight tail booms despite having wood suitable rolled booms resulting booms strong enough lift whole stick/boom assembly holding September 1993 105 Heres example early built-up boom style used Slithery Dee Fl D model Tenny photo new boom design uses Keviar place mangled boom built-up boom balsa bracing mounts using pegs easily repaired spite serious sockets Tenny photo damage John 1 Horton photo boom repair has completed Look closely see wood splice replacing part longeron Tenny photo clip-on magnifier Edmund ScientificThe Keviar tow gets really scrambledP41750 helps viewing Keviarlooking after several strands have strands Tenny photoremoved Tenny photo SHIPPING & HANDLING UPS Ground Continental US $495 UPS Air & Parcel Post $495 plus 10% ot Subtotal Continental US UPS Nest Day Air $1400 plus $100 per lb ot Shipment total 000 add $395 Foreign Orders Parcel Post Air $495 ot Subtotal US Mail $495 plus 10% ot Subtotal boom Typical repair time severe flight damage hour less retaining models trim photo shows boom employed Slithery Dee first 65cm FiD method join stick boom Figure 1 sketch showing details construction used days 00004 inches diameter became available same basis Hard see Most indoor bracing materials difficult see lightweight wire perhaps hardest followed single strands 00004-inch Kevlar contrast 0001-inch Dacron glows brightly Figure 1 Close-up details early built-up boom construction latest boom design last few years havent really good wood booms built old design werent strong stable earlier booms Adding boron longerons helped also wanted control torsional rigidity flying stab used Pennyplanes requires less torsional strength boom stab tilt can adjust automatically Thanks inventive genius Don Lindley new design concept seems have solved problems photo shows section new boom mounting new boom removable three hardwood pegs sliding tissue tubes Also note Kevlar strands replace balsa crosspieces originally used torsional strength prototype boom has test-flown excellent results in-flight accident necessitated field repairs Happily new design lost nothing repairabilitythe models next flight after serious repairs duplicate flight before wreck photo shows model right after wreck another shows close-up repaired boom pointer indicates section repairs made Plastic filament bracing Although various types very thin wire have traditionally used model bracing Kevlar Dacron filaments have used some fliers recent years Several years ago monofilament Dacron 0001 inches diameter available free request recently Kevlar fibers approximately properly placed lighting recently worked intensively Kevlar ttying find what takes 60-plus-year-old eyes see solution simply proved no substitute raw horsepower 50-watt halogen prefocused floodlight proved answer distance four feet lamp makes hard white circle about 30 inches diameter makes 00004inch Kevlar glow Filament separation Both Dacron Kevlar come bundle called towwith approximately 250 strands per tow separating individual strands first few difficult high output light need magnifiers see photo isolate individual strands pull multiple strands four time bundle about four feet length begin separation big light shining over shoulder After isolating group strands coat end strand group very diluted highly plasticized glue attach piece tape serve anchor handle group Pulling first few groups requires care after several groups have separated much easier group anchored tape pull bundle about two inches down group causing bundle hump up make successive pull very slowly below hump repeat process until group completely separated Continued page 132 106 Model Aviation -rIAi Ecs LEA/ CTH S S/Dc VIEu L V T sit RACwOMIUTAAY REAL MACRAFT HAVE PILOTS DOES YOURS OURS HAVE 30 YEARS EXPERIENCE MOLDED FLESH COIOfl READY TO PAINT & GO FLYING SEND SASE FOR ILLUSTRATED ORDER FORM WILLIAMS BROS INC 161 PAWNEE SAN MARCOS CA 02060 - ERS really know what youre doing MODEL SAILPIANES MYTH MAGIC Tony Upso no Math either Laymen Wives Lovers 170 readable pages $1895 plus $300 S&H Beefsteak Mines Ltd Box 1645 Jackson WY 83001 FAX 307 733 7153 write fax brochure FF Indoor/Tenny Continued page 106 After several groups have stripped out bundle looks like mess see photo loose bundle releases groups very easily After group has separated coat thumb forefinger diluted glue pull strands through glue until whole group coated unified large strand move tape storage area long slender box makes excellent safekeeping storage container strength iameter 3 174 Dacron stretches under stress recovers slowly Kevlar has low stretch Kevlar brittle sensitive bending around small-diameter corner Both materials bond very well normal modeling cements better wire bonded multistrand groups will respond hasnt proven yet four-strand Kevlar groups exceptionally easy brace Repairs Repairing Dacron Kevlar bracing much easier other materials wing stab bracing has stripped off apply covering patch new segments plastic bracing can easily spliced 45 174268 Figure 2 Possible plastic filament bundles showing strength relative diameter entire bundle can reduced sitting using frosted transparent tape possible write down number strands group different-sized groups can made later identified impossible count strands after coating individual groups look identical unless very large number strands included strands Multistrand groups work best certain groupings Figure 2 shows configurations three- four- seven-strand groups inherently stable possibly form automatically five-strand group also likely formation figure also shows estimated diameter ratio base strand diameter Note tensile strength group proportional number strands group diameter larger some ratio ranging about 16 about 27 times base diameter Groups three strands much visible kind wire Bracing plastic strands general bracing plastic same wire except visibility factor Choosing whether use Dacron Kevlar fairly simple unbonded single strands remaining bracing Simply place end new strand next existing bracing brush thin glue along two strands Wrap-up have seen Keviar stored paper cylinders drink cans adequate except thing Some kind tape commonly used anchor both ends tow during storage almost inevitably leads few strands being stuck together As result tow wont separate cleanly unless adhesive can cleaned off dont yet have tested suggestion perhaps pressure-sensitive materials will have adequate adhesion leaving residue strands Kevlar tow available sending SASE Rich Doig 6 Canary Hill Dr Orion MI 48359 Similarly 0001-inch Dacron available Bud Tenny PO Box 830545 Richardson TX 75083 SASE included request Teflon tape Jim Clem suggests plum bers Teflon tape ideal keep laminated parts sticking forms tape used seal joints pipe flexible enough wrapped pipe threads resist tearing joints assembled Jim coats forms contact cement stretches Teflon tape over form rubs 132 Model Aviation attfoils dotrnatrtx printer with.. FOILED AGAIN! PLOT AIRFOHS IN ANY CHORD UP TO 24 INCHES MODIFY THICKNESS CAMBER & TRAJUNG EDGE PLOT SKIN ThICKNESS FOR SHEErED WINGS ENTER DATA EASILY VIA INTELLIGENT EDITOR USERFRIENDLY MENU-DRIVEN OPERATION INCLUDES 50 AIRFOIL FILES 26-PAGE USER MANUAL $4500 M h.k dA Gh ifp& pa y lg qind sir 3F difli Sd hifk f CYGNET Software 619 792-8021 3525 Del Mar Heights #23Th San Diego 92130 SAMS MODELS England NEW SCale Free Flight Kits ~WARBIRD* SPITFIRE MK 22/24 24.1/2 $1995 also available Westland Widgeon 24-4 $1495 Hawker Super Fury 21 1/2 2195 add $7 airmail SAMS Chapel Sandon Buntingford Herts SG9 OQJ England GASPARIN C02 Motora now SAMS Note us Checka & Stampa valid uK VISA & Maatercard accepted $-billa LATHES FOR THE MODEL AVIATOR KUEBIPSE U MICHhUE & mc 72-6500 iEi3F CTNL0G $100 FOAM CORE FLOATS FOR AIRPLANES AND HELICOPTERS V HULL FLOATS FOR 430 POUND AIRPLANES CHOOSE FROM PLANS KITS OR READY TO PAINT ALSO FLOATS FOR 4ID POUND HELICOPTERS AMSOIL SYNTHETIC OIL DEALER SEND SA SF FOR FLOAT OR OIL LITERATURE KIRCHER R/C PRODUCTS INC 9 SHEFFIELD WAY CLARK NaJ 07066 down result surface repels types adhesive use Laminated ribs As reported previously have laminating indoor model parts latest difficult project has wing stab ribs Early attempts yielded ribs sometimes relaxed lower camber intended laminated two strips using same diluted white glue discussed before After talking Andy Tagliafico says laminated ribs bulletproof tried three-strip laminations new Inter mediate Stick wing used both Duco cement white glue laminate three strips 0017-inch balsa Except white glues slower drying time approximately equal results both glues None ribs relaxed two methods produced ribs about same weight Andy uses Duco cement thinned 50% preglues top bottom strip top middle strip assembly time brushes acetone strip brushing shape male 12-Volt RacklHerbert Continued page 23 top battery Make sure least inch wood handle must strong enough hold weight whole assembly attached cigarette lighter receptacle 12-volt battery could easily plug 12-volt soldering iron field repairs spotlight night flying 5 VDC silicon solar cell trickle-charges 12-volt source battery feet screwed 1 1/2-inch wood screws supported angle braces feet have small sliding casters keep 12-volt battery off ground chargers placed side rack batteries other side meter located near battery being charged easy monitoring peak voltages batteries attached Velcro boxes mounted hold discharged batteries extra wiring marked box dead know glance what charged what isnt have added blinking LED indicator on-off switch 15-amp fuse assure safety system remind shut everything down return home finish charging shut off main power switch still have Ni-Cd battery hooked chargers LED will continue blink form After third strip laid up uses female form apply pressure rib acetone evaporates bonding strips together Andy uses two refinements basic technique First strip sanded thinner ends produce banana rib Also rib built using strips wider rib width needed sanded width after gluing Boron sandwich Stan Chilton uses another sort laminated rib new FlF modelseach rib thin strip balsa boron top bottom Stan also uses male female forms balsa strip placed female form boron glued rib Next rib placed male form second piece boron attached ribs light length sufficiently strong prevent airfoil deflecting under flight loads Such special ribs lead maximum five ribs FiD wing Andy Tagliafico expects five ribs seven inches long weigh no 0003 ounces ds reverse current flow great warning remind unhook batteries high-power diode could installed like warning feature also made chart rates times battery charger takes 12-volt battery PowerSonic Redwood City California rated 30 Ah has lasted through all-day flying sessions Ive make 12-Volt Rack chargers too Its great way keep things organized great way carry thing flying field may have make modifications equipment will find easy way carry stuff rack 28 inches long nine inches high battery holders 5 x 9 inches Some companies mentioned International RC Service PO Box 1643 San Juan Capistrano CA 92693 IRCS milliamp analyzer Astro Flight 1311 Beach Ave Marina Del Ray CA 90292 Parts List 12-Volt Rack 1 ea28 x 9 x vertical rack 2eaSx9xpineforfeet 8 eabase angle braces feet battery box mounts 1 pkgVelcro strips 1 eaRadio Shack green red blinking LED HXS SEKVU etc k-UK OLDER RADIO UPDATES WE HAVE OVER 26 YEARS EXPERIENCE IN 1C AT WE 1466 windward dr mason ohio 45040 ph 513 398-5423 September 1993 133 SUNGLASSES 5 100% VV Protection Shatterproof Excellent Optical Quality Tints Fit Over Prescriptions SKyS RO BOX 1000 DUMFRIES VA 22026 800-227-9318 visaBJrn/C ELECTRONICS CTT Rubber ft Engine Power Free Flight Diepley Control Line Eiectric Power RfC Airplanee new liluetreted 32 page tebiold size cetelog US ft Canede $100 Foreigh $300 Penn Valley Hobby Center 837-A W Main SI Lanedale PA 19446 215 3U4775 B/C Combat Gremlin RCM 12/92 Affordable Custom Cores Modeters Modelers Official supplier SIC Combat Gremlin wing cores Gremlins Cores $12 Shoes kits $20 templates no wood Full kits wood $35 Combat newsletter short/full kit Upgrade glider intrnssediate level new wing S3O2t SD7037 Gentle Lady Spirit 2M full wing kits $35 Sems-symesrical 25 Quickee 500 cores $8 pre pair Alt orders odd $5 S&H CODs odd $6 additional Let us cut next club project Custom core quantity discounts RA Cores po Sos 863 Southbridge MA 01550 508 765-9998 FLYROD $69 & H Span51 790 sc.in 32-40 Radio 4 ch ht 2 2 1/2 lbs. Ultimate Fun-Fly Machine udes covering & Hardware pkg. throttle flights NO flutter s Best qm Orders Call 1-800-645-KITS Information eCu aea445-1 122 P0 Bun 771 GENERIX Eant wIndsor NJ 0a520 Tomorrows Kits Affordable Prices Write Free Catalog $500 COD Custom Kit Cutters s Anyone Elses
Edition: Model Aviation - 1993/09
Page Numbers: 105, 106, 132, 133
FREE FLIGHT INDOOR U 417 LARRY COSLICK last years USIC Larry Coslick seemed appear out nowhere post some really good times no accidentLarry works really hard develop skills will hear about several techniques space permits meanwhile offers following concept food thought about no touch Easy B contest would interesting might flown rounds starting five- eight- 10- 11- 12-minute goals Allow two attempts target time model touches ceiling disqualified Also two events could held models lighter 07 grams other heavier models Any takers Flying opportunities OhioCleveland area Weekly sessions year-round Category sites site Willoughby Andrews School has 20-foot flat ceiling 60 x 80-foot floor area other site Meridian Euclid Hospital Euclid has 195-foot ceiling 45 x 70-foot floor area Contact Vein Hacker 25599 Breckenridge Dr Euclid OH 44117-1807 Tel 216 486-4990 CaliforniaBurbank Blacksheep Exhibition Squadron VMF-2 14 has monthly sessions second Fridays flying Category site Luther Burbank Middle School 7-10 pm Tony Naccarato 2121 N Hollywood Way Burbank CA 91507 Tel 818 842-5062 MarylandGoddard Space flight Center Record trials flying sessions scheduled auditorium Building 8 Goddard Saturdays 11 am until 1030 pm June 26 July 17 September 11 25 October 9 23 November 6 1993 Sanctioned national FM record trials September 11 25 October 9 23 November 6 NASA security requires attendees US citizens AMA members license available inspection gate list compiled Tom Vallee must notify Tom intent attend advance meet Changes NASA launch schedules other possible events can preempt use auditorium much warning sure verify date Tom before leaving home Tom Vallee 444 Henryton South Laurel MD 20707 Tel 301 498-0790 New JerseyLakehurst New dates Lakehurst #1 began May 1-2 weekend Other dates August 7-8 14-15 21-22 28-29 September 4-6 11-12 18-19 25-26 Oct 2-3 9-10 17 24 Contact Gary Underwood address shown below make necessary arrangements access Lakehurst NAS Attendance Lakehurst meets requires strict adherence rules 1 You must furnish name drivers license number make model vehicle license plate number state registration* Gary Underwood later Wednesday before meet plan attend 2 Obey military regulationsespecially speed limits no-smoking areas restricted parkingall clearly posted 3 Certain base personnel give access lavatories other facilities Please route requests assistance through CD 4 You absolutely must leave flying area least clean find check CD about locate equipment 5 No photos allowed except hangar *OutofAown participants fly rent cars must make special arrangements regarding auto identification Contact Gary Underwood 9 Treelawn Terrace Mercerville NJ 08619 Tel 609 586-3202 information Built-up booms mid-1960s experimented built-up tail booms spite apparently difficult job constructing built-up booms strong advantages light weight superior strength excellent field-repair possibilities working carefully able make competitive-weight tail booms despite having wood suitable rolled booms resulting booms strong enough lift whole stick/boom assembly holding September 1993 105 Heres example early built-up boom style used Slithery Dee Fl D model Tenny photo new boom design uses Keviar place mangled boom built-up boom balsa bracing mounts using pegs easily repaired spite serious sockets Tenny photo damage John 1 Horton photo boom repair has completed Look closely see wood splice replacing part longeron Tenny photo clip-on magnifier Edmund ScientificThe Keviar tow gets really scrambledP41750 helps viewing Keviarlooking after several strands have strands Tenny photoremoved Tenny photo SHIPPING & HANDLING UPS Ground Continental US $495 UPS Air & Parcel Post $495 plus 10% ot Subtotal Continental US UPS Nest Day Air $1400 plus $100 per lb ot Shipment total 000 add $395 Foreign Orders Parcel Post Air $495 ot Subtotal US Mail $495 plus 10% ot Subtotal boom Typical repair time severe flight damage hour less retaining models trim photo shows boom employed Slithery Dee first 65cm FiD method join stick boom Figure 1 sketch showing details construction used days 00004 inches diameter became available same basis Hard see Most indoor bracing materials difficult see lightweight wire perhaps hardest followed single strands 00004-inch Kevlar contrast 0001-inch Dacron glows brightly Figure 1 Close-up details early built-up boom construction latest boom design last few years havent really good wood booms built old design werent strong stable earlier booms Adding boron longerons helped also wanted control torsional rigidity flying stab used Pennyplanes requires less torsional strength boom stab tilt can adjust automatically Thanks inventive genius Don Lindley new design concept seems have solved problems photo shows section new boom mounting new boom removable three hardwood pegs sliding tissue tubes Also note Kevlar strands replace balsa crosspieces originally used torsional strength prototype boom has test-flown excellent results in-flight accident necessitated field repairs Happily new design lost nothing repairabilitythe models next flight after serious repairs duplicate flight before wreck photo shows model right after wreck another shows close-up repaired boom pointer indicates section repairs made Plastic filament bracing Although various types very thin wire have traditionally used model bracing Kevlar Dacron filaments have used some fliers recent years Several years ago monofilament Dacron 0001 inches diameter available free request recently Kevlar fibers approximately properly placed lighting recently worked intensively Kevlar ttying find what takes 60-plus-year-old eyes see solution simply proved no substitute raw horsepower 50-watt halogen prefocused floodlight proved answer distance four feet lamp makes hard white circle about 30 inches diameter makes 00004inch Kevlar glow Filament separation Both Dacron Kevlar come bundle called towwith approximately 250 strands per tow separating individual strands first few difficult high output light need magnifiers see photo isolate individual strands pull multiple strands four time bundle about four feet length begin separation big light shining over shoulder After isolating group strands coat end strand group very diluted highly plasticized glue attach piece tape serve anchor handle group Pulling first few groups requires care after several groups have separated much easier group anchored tape pull bundle about two inches down group causing bundle hump up make successive pull very slowly below hump repeat process until group completely separated Continued page 132 106 Model Aviation -rIAi Ecs LEA/ CTH S S/Dc VIEu L V T sit RACwOMIUTAAY REAL MACRAFT HAVE PILOTS DOES YOURS OURS HAVE 30 YEARS EXPERIENCE MOLDED FLESH COIOfl READY TO PAINT & GO FLYING SEND SASE FOR ILLUSTRATED ORDER FORM WILLIAMS BROS INC 161 PAWNEE SAN MARCOS CA 02060 - ERS really know what youre doing MODEL SAILPIANES MYTH MAGIC Tony Upso no Math either Laymen Wives Lovers 170 readable pages $1895 plus $300 S&H Beefsteak Mines Ltd Box 1645 Jackson WY 83001 FAX 307 733 7153 write fax brochure FF Indoor/Tenny Continued page 106 After several groups have stripped out bundle looks like mess see photo loose bundle releases groups very easily After group has separated coat thumb forefinger diluted glue pull strands through glue until whole group coated unified large strand move tape storage area long slender box makes excellent safekeeping storage container strength iameter 3 174 Dacron stretches under stress recovers slowly Kevlar has low stretch Kevlar brittle sensitive bending around small-diameter corner Both materials bond very well normal modeling cements better wire bonded multistrand groups will respond hasnt proven yet four-strand Kevlar groups exceptionally easy brace Repairs Repairing Dacron Kevlar bracing much easier other materials wing stab bracing has stripped off apply covering patch new segments plastic bracing can easily spliced 45 174268 Figure 2 Possible plastic filament bundles showing strength relative diameter entire bundle can reduced sitting using frosted transparent tape possible write down number strands group different-sized groups can made later identified impossible count strands after coating individual groups look identical unless very large number strands included strands Multistrand groups work best certain groupings Figure 2 shows configurations three- four- seven-strand groups inherently stable possibly form automatically five-strand group also likely formation figure also shows estimated diameter ratio base strand diameter Note tensile strength group proportional number strands group diameter larger some ratio ranging about 16 about 27 times base diameter Groups three strands much visible kind wire Bracing plastic strands general bracing plastic same wire except visibility factor Choosing whether use Dacron Kevlar fairly simple unbonded single strands remaining bracing Simply place end new strand next existing bracing brush thin glue along two strands Wrap-up have seen Keviar stored paper cylinders drink cans adequate except thing Some kind tape commonly used anchor both ends tow during storage almost inevitably leads few strands being stuck together As result tow wont separate cleanly unless adhesive can cleaned off dont yet have tested suggestion perhaps pressure-sensitive materials will have adequate adhesion leaving residue strands Kevlar tow available sending SASE Rich Doig 6 Canary Hill Dr Orion MI 48359 Similarly 0001-inch Dacron available Bud Tenny PO Box 830545 Richardson TX 75083 SASE included request Teflon tape Jim Clem suggests plum bers Teflon tape ideal keep laminated parts sticking forms tape used seal joints pipe flexible enough wrapped pipe threads resist tearing joints assembled Jim coats forms contact cement stretches Teflon tape over form rubs 132 Model Aviation attfoils dotrnatrtx printer with.. FOILED AGAIN! PLOT AIRFOHS IN ANY CHORD UP TO 24 INCHES MODIFY THICKNESS CAMBER & TRAJUNG EDGE PLOT SKIN ThICKNESS FOR SHEErED WINGS ENTER DATA EASILY VIA INTELLIGENT EDITOR USERFRIENDLY MENU-DRIVEN OPERATION INCLUDES 50 AIRFOIL FILES 26-PAGE USER MANUAL $4500 M h.k dA Gh ifp& pa y lg qind sir 3F difli Sd hifk f CYGNET Software 619 792-8021 3525 Del Mar Heights #23Th San Diego 92130 SAMS MODELS England NEW SCale Free Flight Kits ~WARBIRD* SPITFIRE MK 22/24 24.1/2 $1995 also available Westland Widgeon 24-4 $1495 Hawker Super Fury 21 1/2 2195 add $7 airmail SAMS Chapel Sandon Buntingford Herts SG9 OQJ England GASPARIN C02 Motora now SAMS Note us Checka & Stampa valid uK VISA & Maatercard accepted $-billa LATHES FOR THE MODEL AVIATOR KUEBIPSE U MICHhUE & mc 72-6500 iEi3F CTNL0G $100 FOAM CORE FLOATS FOR AIRPLANES AND HELICOPTERS V HULL FLOATS FOR 430 POUND AIRPLANES CHOOSE FROM PLANS KITS OR READY TO PAINT ALSO FLOATS FOR 4ID POUND HELICOPTERS AMSOIL SYNTHETIC OIL DEALER SEND SA SF FOR FLOAT OR OIL LITERATURE KIRCHER R/C PRODUCTS INC 9 SHEFFIELD WAY CLARK NaJ 07066 down result surface repels types adhesive use Laminated ribs As reported previously have laminating indoor model parts latest difficult project has wing stab ribs Early attempts yielded ribs sometimes relaxed lower camber intended laminated two strips using same diluted white glue discussed before After talking Andy Tagliafico says laminated ribs bulletproof tried three-strip laminations new Inter mediate Stick wing used both Duco cement white glue laminate three strips 0017-inch balsa Except white glues slower drying time approximately equal results both glues None ribs relaxed two methods produced ribs about same weight Andy uses Duco cement thinned 50% preglues top bottom strip top middle strip assembly time brushes acetone strip brushing shape male 12-Volt RacklHerbert Continued page 23 top battery Make sure least inch wood handle must strong enough hold weight whole assembly attached cigarette lighter receptacle 12-volt battery could easily plug 12-volt soldering iron field repairs spotlight night flying 5 VDC silicon solar cell trickle-charges 12-volt source battery feet screwed 1 1/2-inch wood screws supported angle braces feet have small sliding casters keep 12-volt battery off ground chargers placed side rack batteries other side meter located near battery being charged easy monitoring peak voltages batteries attached Velcro boxes mounted hold discharged batteries extra wiring marked box dead know glance what charged what isnt have added blinking LED indicator on-off switch 15-amp fuse assure safety system remind shut everything down return home finish charging shut off main power switch still have Ni-Cd battery hooked chargers LED will continue blink form After third strip laid up uses female form apply pressure rib acetone evaporates bonding strips together Andy uses two refinements basic technique First strip sanded thinner ends produce banana rib Also rib built using strips wider rib width needed sanded width after gluing Boron sandwich Stan Chilton uses another sort laminated rib new FlF modelseach rib thin strip balsa boron top bottom Stan also uses male female forms balsa strip placed female form boron glued rib Next rib placed male form second piece boron attached ribs light length sufficiently strong prevent airfoil deflecting under flight loads Such special ribs lead maximum five ribs FiD wing Andy Tagliafico expects five ribs seven inches long weigh no 0003 ounces ds reverse current flow great warning remind unhook batteries high-power diode could installed like warning feature also made chart rates times battery charger takes 12-volt battery PowerSonic Redwood City California rated 30 Ah has lasted through all-day flying sessions Ive make 12-Volt Rack chargers too Its great way keep things organized great way carry thing flying field may have make modifications equipment will find easy way carry stuff rack 28 inches long nine inches high battery holders 5 x 9 inches Some companies mentioned International RC Service PO Box 1643 San Juan Capistrano CA 92693 IRCS milliamp analyzer Astro Flight 1311 Beach Ave Marina Del Ray CA 90292 Parts List 12-Volt Rack 1 ea28 x 9 x vertical rack 2eaSx9xpineforfeet 8 eabase angle braces feet battery box mounts 1 pkgVelcro strips 1 eaRadio Shack green red blinking LED HXS SEKVU etc k-UK OLDER RADIO UPDATES WE HAVE OVER 26 YEARS EXPERIENCE IN 1C AT WE 1466 windward dr mason ohio 45040 ph 513 398-5423 September 1993 133 SUNGLASSES 5 100% VV Protection Shatterproof Excellent Optical Quality Tints Fit Over Prescriptions SKyS RO BOX 1000 DUMFRIES VA 22026 800-227-9318 visaBJrn/C ELECTRONICS CTT Rubber ft Engine Power Free Flight Diepley Control Line Eiectric Power RfC Airplanee new liluetreted 32 page tebiold size cetelog US ft Canede $100 Foreigh $300 Penn Valley Hobby Center 837-A W Main SI Lanedale PA 19446 215 3U4775 B/C Combat Gremlin RCM 12/92 Affordable Custom Cores Modeters Modelers Official supplier SIC Combat Gremlin wing cores Gremlins Cores $12 Shoes kits $20 templates no wood Full kits wood $35 Combat newsletter short/full kit Upgrade glider intrnssediate level new wing S3O2t SD7037 Gentle Lady Spirit 2M full wing kits $35 Sems-symesrical 25 Quickee 500 cores $8 pre pair Alt orders odd $5 S&H CODs odd $6 additional Let us cut next club project Custom core quantity discounts RA Cores po Sos 863 Southbridge MA 01550 508 765-9998 FLYROD $69 & H Span51 790 sc.in 32-40 Radio 4 ch ht 2 2 1/2 lbs. Ultimate Fun-Fly Machine udes covering & Hardware pkg. throttle flights NO flutter s Best qm Orders Call 1-800-645-KITS Information eCu aea445-1 122 P0 Bun 771 GENERIX Eant wIndsor NJ 0a520 Tomorrows Kits Affordable Prices Write Free Catalog $500 COD Custom Kit Cutters s Anyone Elses