NO OCR TEXT mile thethe reallsiug Robarta tidators UNel horns erasetting -I system uses ma line connecta seethstiutas Motuators Lii e exi waiAMA - *4 IfU rfJJ don placed ci m precisi sted under thean 1 filled four se 86 stem overflow also eec door main quired maneuvers whee store gear 00 dual a1 auju ang List U ad -s ith h wered ar ex June 1988 87 y DCI exb dse reti Fron Th II j-t II [ ounity ge kee1 xation oft] imp Rob tmc 7/ iravi pipe IAEMOiW odahffA doors havebar exhaustud both trair atioui ervos next ik over st commerci fit bc ity NO OCR TEXT AVAILABLE IN 4-COLORS. Red Yellow White Black 468 Helicopter Tail Rotor Blade Covering 7/8 x 9 469 Helicopter Tail Rotor Blade Covering 7/8 x 9 470 Helicopter Tail Rotor Blade Covering 7/8 x 9 471 Helicopter Tail Rotor Blade Covering 7/8 x 9 472 Helicopter Tail Rotor Blade Covering 1-7/16x 12 473 Helicopter Tail Rotor Blade Covering 1-7/16x 12 474 Helicopter Tail Rotor Blade Covering 1-7/16x 12 475 HelicopterTail Rotor Blade Covering 1-7/16x 12 476 Helicopter Main Rotor Blade Covering 2 x 48 477 Heiicooter Main Rotor Blade Covering 2 x 48 Obsession/Hodgson Continued page 89 servo door servo reaches end its travelie doors fully openedthe limit switch connects wheel servo tripped wheels lowered retract command activates reverse sequence wheels fully retracted wheel retract servo limit switch tripped door servo acti vated close doors Landing gear doors Heres fund ingenuity really taxed ground rules doors should precision fitted hinges should hidden followed hinges have remote locations main gear doors hinges located back inside wing about inch doors arrangement allows doors rotate also immediately clear wing surface opening begins solution locating front gear door hinges less straightforward cause double curvature clam shell doors remote hinging would have least inch doors hinges would interfere other fuselage Since fuse lage wide enough accommodate HEAT SHRINKABLE 4 MILTHICK FILM EASY TO FOLLOW INSTRUCTIONS 478 Helicopter Main Rotor Blade Covering 2 x 48 479 Helicopter Main Rotor Blade Covering 2 x 48 480 Helicopter Main Rotor Blade Covering 2-112x 60 481 Helicopter Main Rotor Blade Covering 2-1/2x 60 482 Helicopter Main Rotor Blade Covering 2-1/2x 60 483 Helicopter Main Rotor Blade Covering 2-1/2 x 60 484 Helicopter Main Rotor Blade Covering 3-1/4 x 60 485 Helicopter Main Rotor Blade Covering 3-1/4x 60 486 Helicopter Main Rotor Blade Covering 3-1/4x 60 487 Helicopter Main Rotor Blade Covering 3-114x 60 required remote hinge locations alter nate scheme devised answer make hinges selves movable four hinges doors built concentric aluminum tubing sliders doors actuated open position first motion oc curs hinge movement doors simply move away fuselage about /8 beginning rotational motion As actuation continues doors rotate open position Upon closing se quence reverses doors first rotate closed position move uni son /8 until theyre flush fuse lage main gear doors achieving proper door travel required some special mechanisms lever arm spans distance between hinge actu ation cable attachment point made ad justable door adjustment con trols magnitude angle door sweeps second adjustment varies length actuation cable providing control door stopping position Simul taneously setting adjustments regu lates arc door travel closed open positions front gear doors required no special method adjustment Excess motion available ab sorbed spring linkage actuation cable doors lock once reach fully open position done ensure wind loading could accidentally partially close door prevent wheel retrac tion main gear doors lock open gravity-actuated lock deactivated wheels reach full re tract position front door lock little elaborate clamshell sections have spring-loaded pins slide po sition doors fully open pins withdrawn action front wheel retraction An unexpected problem discovered inboard main gear doors could opened far enough because extending belly pan Either entire retract system moved folding section adjacent belly pan incorporated inboard door latter design se lected Hinging doors simple enough having fold unfold just right point another matter folding action required hinged sec tion have actuator would push dur ing part door travel reach point would pull remainder door motion necessary dual action achieved actuators have two internal springs pretoaded compression other preloaded tension results excellent about three-quarters door opening motion no door folding occurs point doors rapidly fold remain folded rest open ing motion converse actions occur Continued page 160 June 1988 159 WITH EASY TO APPLY HELICOPTER BLADE COVERING FIVE SIZES AVAILABLE 7/8 x 9 1-7/1 6x 12 2x 48 2-1 /2x 60 3-1/4x 60 WhtRed BIkYel RedWht YelBIk WhtRed BIkYel RedWht YelBIk WhtRed 81kYeI Ryan AQM-34Q Teledyne-Ryan YQM-98A AC Models SHOCK ABSORBING STRUTS* WS Jerday Inc dba Impact Engineering 2100 Stonehill Court Arlington TX 76012 817 261-8130 * Patents Pending K doors close Building Pattern plane intricate obviously took time imagination patience article Ive covered significant design features volved whole project has de scribed challenging fun step enjoyable came retrospect though wouldnt want again ticipate building planes now aspirations will conventional RC Soaring/Blakeslee Continued page 39 Jack Hiner 2213 Prentis Creek A104 Downers Grove IL 60516 can call Jack 312 8520154 Kevlar Sailpianes Last month John Wyss de scribed new Multiplex Royal radio month discusses experiments using Keviar construct latest F3B ship Eclipse Take John Kevlar has gained popularity material Sailplane fuselages place fiberglass So what Kevlar aramid fiber produced DuPont originally developed belting material automobile tires woven types fabrics similar way fiber glass cloth has made can used place fiberglass making almost part Kevlar has higher tensile strength higher tensile modulus lower density fiber glass other words stronger lighter fiberglass does have some negative pects has lower compressional strength expensive works poorly polyester res ins general difficult work fiberglass better understand Kevlar two Eclipse fu selages laid up using same mold used multiple layers E-type fiberglass other used multiple layers Kevlar Both laid up using Safe-T-Poxy epoxy resin Three problems encountered using Key lar First Kevlar difficult cut shop scis sors used cut fiberglass would cut Key lar pizza-wheel fiberglass cutter also unsuccessful special expensive set shears designed use Kevlar worked rea sonably well nicely shop scissors fiberglass second problem has trimming excess material joint line mold epoxy reaches rubbery stage No less dozen single-edge razor blades used trim mold edgedoing job fiber glass usually takes four third problem has fact Kevlar does become transparent saturat ed epoxy lack transparency makes difficult see eliminate air bubbles laminate fourth problem Kevlar cant sanded just fuzzes gets annoying mess comparison two fuselages made after respective halves joined fiber glass weighed exactly 11 oz Kevlar fuse weighed 75 oz 35-oz difference repre sents 32% reduction weight cer tainly significant next question two fuselages equivalent strength stiffness measure 160 Model Aviation STEEL CANOPY FRAMEWORKS information send SASE call us 017W j 145 scale GROB 109 payng ENG 45 60 4CwlEnya 45 4CCont US ENG 40 50 2C$29995 Call Write Free Brochure umms COD 209 526-3055 1313 Nina Court Modesto CA 95355
Edition: Model Aviation - 1988/06
Page Numbers: 85, 86, 87, 88, 89, 159, 160
NO OCR TEXT mile thethe reallsiug Robarta tidators UNel horns erasetting -I system uses ma line connecta seethstiutas Motuators Lii e exi waiAMA - *4 IfU rfJJ don placed ci m precisi sted under thean 1 filled four se 86 stem overflow also eec door main quired maneuvers whee store gear 00 dual a1 auju ang List U ad -s ith h wered ar ex June 1988 87 y DCI exb dse reti Fron Th II j-t II [ ounity ge kee1 xation oft] imp Rob tmc 7/ iravi pipe IAEMOiW odahffA doors havebar exhaustud both trair atioui ervos next ik over st commerci fit bc ity NO OCR TEXT AVAILABLE IN 4-COLORS. Red Yellow White Black 468 Helicopter Tail Rotor Blade Covering 7/8 x 9 469 Helicopter Tail Rotor Blade Covering 7/8 x 9 470 Helicopter Tail Rotor Blade Covering 7/8 x 9 471 Helicopter Tail Rotor Blade Covering 7/8 x 9 472 Helicopter Tail Rotor Blade Covering 1-7/16x 12 473 Helicopter Tail Rotor Blade Covering 1-7/16x 12 474 Helicopter Tail Rotor Blade Covering 1-7/16x 12 475 HelicopterTail Rotor Blade Covering 1-7/16x 12 476 Helicopter Main Rotor Blade Covering 2 x 48 477 Heiicooter Main Rotor Blade Covering 2 x 48 Obsession/Hodgson Continued page 89 servo door servo reaches end its travelie doors fully openedthe limit switch connects wheel servo tripped wheels lowered retract command activates reverse sequence wheels fully retracted wheel retract servo limit switch tripped door servo acti vated close doors Landing gear doors Heres fund ingenuity really taxed ground rules doors should precision fitted hinges should hidden followed hinges have remote locations main gear doors hinges located back inside wing about inch doors arrangement allows doors rotate also immediately clear wing surface opening begins solution locating front gear door hinges less straightforward cause double curvature clam shell doors remote hinging would have least inch doors hinges would interfere other fuselage Since fuse lage wide enough accommodate HEAT SHRINKABLE 4 MILTHICK FILM EASY TO FOLLOW INSTRUCTIONS 478 Helicopter Main Rotor Blade Covering 2 x 48 479 Helicopter Main Rotor Blade Covering 2 x 48 480 Helicopter Main Rotor Blade Covering 2-112x 60 481 Helicopter Main Rotor Blade Covering 2-1/2x 60 482 Helicopter Main Rotor Blade Covering 2-1/2x 60 483 Helicopter Main Rotor Blade Covering 2-1/2 x 60 484 Helicopter Main Rotor Blade Covering 3-1/4 x 60 485 Helicopter Main Rotor Blade Covering 3-1/4x 60 486 Helicopter Main Rotor Blade Covering 3-1/4x 60 487 Helicopter Main Rotor Blade Covering 3-114x 60 required remote hinge locations alter nate scheme devised answer make hinges selves movable four hinges doors built concentric aluminum tubing sliders doors actuated open position first motion oc curs hinge movement doors simply move away fuselage about /8 beginning rotational motion As actuation continues doors rotate open position Upon closing se quence reverses doors first rotate closed position move uni son /8 until theyre flush fuse lage main gear doors achieving proper door travel required some special mechanisms lever arm spans distance between hinge actu ation cable attachment point made ad justable door adjustment con trols magnitude angle door sweeps second adjustment varies length actuation cable providing control door stopping position Simul taneously setting adjustments regu lates arc door travel closed open positions front gear doors required no special method adjustment Excess motion available ab sorbed spring linkage actuation cable doors lock once reach fully open position done ensure wind loading could accidentally partially close door prevent wheel retrac tion main gear doors lock open gravity-actuated lock deactivated wheels reach full re tract position front door lock little elaborate clamshell sections have spring-loaded pins slide po sition doors fully open pins withdrawn action front wheel retraction An unexpected problem discovered inboard main gear doors could opened far enough because extending belly pan Either entire retract system moved folding section adjacent belly pan incorporated inboard door latter design se lected Hinging doors simple enough having fold unfold just right point another matter folding action required hinged sec tion have actuator would push dur ing part door travel reach point would pull remainder door motion necessary dual action achieved actuators have two internal springs pretoaded compression other preloaded tension results excellent about three-quarters door opening motion no door folding occurs point doors rapidly fold remain folded rest open ing motion converse actions occur Continued page 160 June 1988 159 WITH EASY TO APPLY HELICOPTER BLADE COVERING FIVE SIZES AVAILABLE 7/8 x 9 1-7/1 6x 12 2x 48 2-1 /2x 60 3-1/4x 60 WhtRed BIkYel RedWht YelBIk WhtRed BIkYel RedWht YelBIk WhtRed 81kYeI Ryan AQM-34Q Teledyne-Ryan YQM-98A AC Models SHOCK ABSORBING STRUTS* WS Jerday Inc dba Impact Engineering 2100 Stonehill Court Arlington TX 76012 817 261-8130 * Patents Pending K doors close Building Pattern plane intricate obviously took time imagination patience article Ive covered significant design features volved whole project has de scribed challenging fun step enjoyable came retrospect though wouldnt want again ticipate building planes now aspirations will conventional RC Soaring/Blakeslee Continued page 39 Jack Hiner 2213 Prentis Creek A104 Downers Grove IL 60516 can call Jack 312 8520154 Kevlar Sailpianes Last month John Wyss de scribed new Multiplex Royal radio month discusses experiments using Keviar construct latest F3B ship Eclipse Take John Kevlar has gained popularity material Sailplane fuselages place fiberglass So what Kevlar aramid fiber produced DuPont originally developed belting material automobile tires woven types fabrics similar way fiber glass cloth has made can used place fiberglass making almost part Kevlar has higher tensile strength higher tensile modulus lower density fiber glass other words stronger lighter fiberglass does have some negative pects has lower compressional strength expensive works poorly polyester res ins general difficult work fiberglass better understand Kevlar two Eclipse fu selages laid up using same mold used multiple layers E-type fiberglass other used multiple layers Kevlar Both laid up using Safe-T-Poxy epoxy resin Three problems encountered using Key lar First Kevlar difficult cut shop scis sors used cut fiberglass would cut Key lar pizza-wheel fiberglass cutter also unsuccessful special expensive set shears designed use Kevlar worked rea sonably well nicely shop scissors fiberglass second problem has trimming excess material joint line mold epoxy reaches rubbery stage No less dozen single-edge razor blades used trim mold edgedoing job fiber glass usually takes four third problem has fact Kevlar does become transparent saturat ed epoxy lack transparency makes difficult see eliminate air bubbles laminate fourth problem Kevlar cant sanded just fuzzes gets annoying mess comparison two fuselages made after respective halves joined fiber glass weighed exactly 11 oz Kevlar fuse weighed 75 oz 35-oz difference repre sents 32% reduction weight cer tainly significant next question two fuselages equivalent strength stiffness measure 160 Model Aviation STEEL CANOPY FRAMEWORKS information send SASE call us 017W j 145 scale GROB 109 payng ENG 45 60 4CwlEnya 45 4CCont US ENG 40 50 2C$29995 Call Write Free Brochure umms COD 209 526-3055 1313 Nina Court Modesto CA 95355
Edition: Model Aviation - 1988/06
Page Numbers: 85, 86, 87, 88, 89, 159, 160
NO OCR TEXT mile thethe reallsiug Robarta tidators UNel horns erasetting -I system uses ma line connecta seethstiutas Motuators Lii e exi waiAMA - *4 IfU rfJJ don placed ci m precisi sted under thean 1 filled four se 86 stem overflow also eec door main quired maneuvers whee store gear 00 dual a1 auju ang List U ad -s ith h wered ar ex June 1988 87 y DCI exb dse reti Fron Th II j-t II [ ounity ge kee1 xation oft] imp Rob tmc 7/ iravi pipe IAEMOiW odahffA doors havebar exhaustud both trair atioui ervos next ik over st commerci fit bc ity NO OCR TEXT AVAILABLE IN 4-COLORS. Red Yellow White Black 468 Helicopter Tail Rotor Blade Covering 7/8 x 9 469 Helicopter Tail Rotor Blade Covering 7/8 x 9 470 Helicopter Tail Rotor Blade Covering 7/8 x 9 471 Helicopter Tail Rotor Blade Covering 7/8 x 9 472 Helicopter Tail Rotor Blade Covering 1-7/16x 12 473 Helicopter Tail Rotor Blade Covering 1-7/16x 12 474 Helicopter Tail Rotor Blade Covering 1-7/16x 12 475 HelicopterTail Rotor Blade Covering 1-7/16x 12 476 Helicopter Main Rotor Blade Covering 2 x 48 477 Heiicooter Main Rotor Blade Covering 2 x 48 Obsession/Hodgson Continued page 89 servo door servo reaches end its travelie doors fully openedthe limit switch connects wheel servo tripped wheels lowered retract command activates reverse sequence wheels fully retracted wheel retract servo limit switch tripped door servo acti vated close doors Landing gear doors Heres fund ingenuity really taxed ground rules doors should precision fitted hinges should hidden followed hinges have remote locations main gear doors hinges located back inside wing about inch doors arrangement allows doors rotate also immediately clear wing surface opening begins solution locating front gear door hinges less straightforward cause double curvature clam shell doors remote hinging would have least inch doors hinges would interfere other fuselage Since fuse lage wide enough accommodate HEAT SHRINKABLE 4 MILTHICK FILM EASY TO FOLLOW INSTRUCTIONS 478 Helicopter Main Rotor Blade Covering 2 x 48 479 Helicopter Main Rotor Blade Covering 2 x 48 480 Helicopter Main Rotor Blade Covering 2-112x 60 481 Helicopter Main Rotor Blade Covering 2-1/2x 60 482 Helicopter Main Rotor Blade Covering 2-1/2x 60 483 Helicopter Main Rotor Blade Covering 2-1/2 x 60 484 Helicopter Main Rotor Blade Covering 3-1/4 x 60 485 Helicopter Main Rotor Blade Covering 3-1/4x 60 486 Helicopter Main Rotor Blade Covering 3-1/4x 60 487 Helicopter Main Rotor Blade Covering 3-114x 60 required remote hinge locations alter nate scheme devised answer make hinges selves movable four hinges doors built concentric aluminum tubing sliders doors actuated open position first motion oc curs hinge movement doors simply move away fuselage about /8 beginning rotational motion As actuation continues doors rotate open position Upon closing se quence reverses doors first rotate closed position move uni son /8 until theyre flush fuse lage main gear doors achieving proper door travel required some special mechanisms lever arm spans distance between hinge actu ation cable attachment point made ad justable door adjustment con trols magnitude angle door sweeps second adjustment varies length actuation cable providing control door stopping position Simul taneously setting adjustments regu lates arc door travel closed open positions front gear doors required no special method adjustment Excess motion available ab sorbed spring linkage actuation cable doors lock once reach fully open position done ensure wind loading could accidentally partially close door prevent wheel retrac tion main gear doors lock open gravity-actuated lock deactivated wheels reach full re tract position front door lock little elaborate clamshell sections have spring-loaded pins slide po sition doors fully open pins withdrawn action front wheel retraction An unexpected problem discovered inboard main gear doors could opened far enough because extending belly pan Either entire retract system moved folding section adjacent belly pan incorporated inboard door latter design se lected Hinging doors simple enough having fold unfold just right point another matter folding action required hinged sec tion have actuator would push dur ing part door travel reach point would pull remainder door motion necessary dual action achieved actuators have two internal springs pretoaded compression other preloaded tension results excellent about three-quarters door opening motion no door folding occurs point doors rapidly fold remain folded rest open ing motion converse actions occur Continued page 160 June 1988 159 WITH EASY TO APPLY HELICOPTER BLADE COVERING FIVE SIZES AVAILABLE 7/8 x 9 1-7/1 6x 12 2x 48 2-1 /2x 60 3-1/4x 60 WhtRed BIkYel RedWht YelBIk WhtRed BIkYel RedWht YelBIk WhtRed 81kYeI Ryan AQM-34Q Teledyne-Ryan YQM-98A AC Models SHOCK ABSORBING STRUTS* WS Jerday Inc dba Impact Engineering 2100 Stonehill Court Arlington TX 76012 817 261-8130 * Patents Pending K doors close Building Pattern plane intricate obviously took time imagination patience article Ive covered significant design features volved whole project has de scribed challenging fun step enjoyable came retrospect though wouldnt want again ticipate building planes now aspirations will conventional RC Soaring/Blakeslee Continued page 39 Jack Hiner 2213 Prentis Creek A104 Downers Grove IL 60516 can call Jack 312 8520154 Kevlar Sailpianes Last month John Wyss de scribed new Multiplex Royal radio month discusses experiments using Keviar construct latest F3B ship Eclipse Take John Kevlar has gained popularity material Sailplane fuselages place fiberglass So what Kevlar aramid fiber produced DuPont originally developed belting material automobile tires woven types fabrics similar way fiber glass cloth has made can used place fiberglass making almost part Kevlar has higher tensile strength higher tensile modulus lower density fiber glass other words stronger lighter fiberglass does have some negative pects has lower compressional strength expensive works poorly polyester res ins general difficult work fiberglass better understand Kevlar two Eclipse fu selages laid up using same mold used multiple layers E-type fiberglass other used multiple layers Kevlar Both laid up using Safe-T-Poxy epoxy resin Three problems encountered using Key lar First Kevlar difficult cut shop scis sors used cut fiberglass would cut Key lar pizza-wheel fiberglass cutter also unsuccessful special expensive set shears designed use Kevlar worked rea sonably well nicely shop scissors fiberglass second problem has trimming excess material joint line mold epoxy reaches rubbery stage No less dozen single-edge razor blades used trim mold edgedoing job fiber glass usually takes four third problem has fact Kevlar does become transparent saturat ed epoxy lack transparency makes difficult see eliminate air bubbles laminate fourth problem Kevlar cant sanded just fuzzes gets annoying mess comparison two fuselages made after respective halves joined fiber glass weighed exactly 11 oz Kevlar fuse weighed 75 oz 35-oz difference repre sents 32% reduction weight cer tainly significant next question two fuselages equivalent strength stiffness measure 160 Model Aviation STEEL CANOPY FRAMEWORKS information send SASE call us 017W j 145 scale GROB 109 payng ENG 45 60 4CwlEnya 45 4CCont US ENG 40 50 2C$29995 Call Write Free Brochure umms COD 209 526-3055 1313 Nina Court Modesto CA 95355
Edition: Model Aviation - 1988/06
Page Numbers: 85, 86, 87, 88, 89, 159, 160
NO OCR TEXT mile thethe reallsiug Robarta tidators UNel horns erasetting -I system uses ma line connecta seethstiutas Motuators Lii e exi waiAMA - *4 IfU rfJJ don placed ci m precisi sted under thean 1 filled four se 86 stem overflow also eec door main quired maneuvers whee store gear 00 dual a1 auju ang List U ad -s ith h wered ar ex June 1988 87 y DCI exb dse reti Fron Th II j-t II [ ounity ge kee1 xation oft] imp Rob tmc 7/ iravi pipe IAEMOiW odahffA doors havebar exhaustud both trair atioui ervos next ik over st commerci fit bc ity NO OCR TEXT AVAILABLE IN 4-COLORS. Red Yellow White Black 468 Helicopter Tail Rotor Blade Covering 7/8 x 9 469 Helicopter Tail Rotor Blade Covering 7/8 x 9 470 Helicopter Tail Rotor Blade Covering 7/8 x 9 471 Helicopter Tail Rotor Blade Covering 7/8 x 9 472 Helicopter Tail Rotor Blade Covering 1-7/16x 12 473 Helicopter Tail Rotor Blade Covering 1-7/16x 12 474 Helicopter Tail Rotor Blade Covering 1-7/16x 12 475 HelicopterTail Rotor Blade Covering 1-7/16x 12 476 Helicopter Main Rotor Blade Covering 2 x 48 477 Heiicooter Main Rotor Blade Covering 2 x 48 Obsession/Hodgson Continued page 89 servo door servo reaches end its travelie doors fully openedthe limit switch connects wheel servo tripped wheels lowered retract command activates reverse sequence wheels fully retracted wheel retract servo limit switch tripped door servo acti vated close doors Landing gear doors Heres fund ingenuity really taxed ground rules doors should precision fitted hinges should hidden followed hinges have remote locations main gear doors hinges located back inside wing about inch doors arrangement allows doors rotate also immediately clear wing surface opening begins solution locating front gear door hinges less straightforward cause double curvature clam shell doors remote hinging would have least inch doors hinges would interfere other fuselage Since fuse lage wide enough accommodate HEAT SHRINKABLE 4 MILTHICK FILM EASY TO FOLLOW INSTRUCTIONS 478 Helicopter Main Rotor Blade Covering 2 x 48 479 Helicopter Main Rotor Blade Covering 2 x 48 480 Helicopter Main Rotor Blade Covering 2-112x 60 481 Helicopter Main Rotor Blade Covering 2-1/2x 60 482 Helicopter Main Rotor Blade Covering 2-1/2x 60 483 Helicopter Main Rotor Blade Covering 2-1/2 x 60 484 Helicopter Main Rotor Blade Covering 3-1/4 x 60 485 Helicopter Main Rotor Blade Covering 3-1/4x 60 486 Helicopter Main Rotor Blade Covering 3-1/4x 60 487 Helicopter Main Rotor Blade Covering 3-114x 60 required remote hinge locations alter nate scheme devised answer make hinges selves movable four hinges doors built concentric aluminum tubing sliders doors actuated open position first motion oc curs hinge movement doors simply move away fuselage about /8 beginning rotational motion As actuation continues doors rotate open position Upon closing se quence reverses doors first rotate closed position move uni son /8 until theyre flush fuse lage main gear doors achieving proper door travel required some special mechanisms lever arm spans distance between hinge actu ation cable attachment point made ad justable door adjustment con trols magnitude angle door sweeps second adjustment varies length actuation cable providing control door stopping position Simul taneously setting adjustments regu lates arc door travel closed open positions front gear doors required no special method adjustment Excess motion available ab sorbed spring linkage actuation cable doors lock once reach fully open position done ensure wind loading could accidentally partially close door prevent wheel retrac tion main gear doors lock open gravity-actuated lock deactivated wheels reach full re tract position front door lock little elaborate clamshell sections have spring-loaded pins slide po sition doors fully open pins withdrawn action front wheel retraction An unexpected problem discovered inboard main gear doors could opened far enough because extending belly pan Either entire retract system moved folding section adjacent belly pan incorporated inboard door latter design se lected Hinging doors simple enough having fold unfold just right point another matter folding action required hinged sec tion have actuator would push dur ing part door travel reach point would pull remainder door motion necessary dual action achieved actuators have two internal springs pretoaded compression other preloaded tension results excellent about three-quarters door opening motion no door folding occurs point doors rapidly fold remain folded rest open ing motion converse actions occur Continued page 160 June 1988 159 WITH EASY TO APPLY HELICOPTER BLADE COVERING FIVE SIZES AVAILABLE 7/8 x 9 1-7/1 6x 12 2x 48 2-1 /2x 60 3-1/4x 60 WhtRed BIkYel RedWht YelBIk WhtRed BIkYel RedWht YelBIk WhtRed 81kYeI Ryan AQM-34Q Teledyne-Ryan YQM-98A AC Models SHOCK ABSORBING STRUTS* WS Jerday Inc dba Impact Engineering 2100 Stonehill Court Arlington TX 76012 817 261-8130 * Patents Pending K doors close Building Pattern plane intricate obviously took time imagination patience article Ive covered significant design features volved whole project has de scribed challenging fun step enjoyable came retrospect though wouldnt want again ticipate building planes now aspirations will conventional RC Soaring/Blakeslee Continued page 39 Jack Hiner 2213 Prentis Creek A104 Downers Grove IL 60516 can call Jack 312 8520154 Kevlar Sailpianes Last month John Wyss de scribed new Multiplex Royal radio month discusses experiments using Keviar construct latest F3B ship Eclipse Take John Kevlar has gained popularity material Sailplane fuselages place fiberglass So what Kevlar aramid fiber produced DuPont originally developed belting material automobile tires woven types fabrics similar way fiber glass cloth has made can used place fiberglass making almost part Kevlar has higher tensile strength higher tensile modulus lower density fiber glass other words stronger lighter fiberglass does have some negative pects has lower compressional strength expensive works poorly polyester res ins general difficult work fiberglass better understand Kevlar two Eclipse fu selages laid up using same mold used multiple layers E-type fiberglass other used multiple layers Kevlar Both laid up using Safe-T-Poxy epoxy resin Three problems encountered using Key lar First Kevlar difficult cut shop scis sors used cut fiberglass would cut Key lar pizza-wheel fiberglass cutter also unsuccessful special expensive set shears designed use Kevlar worked rea sonably well nicely shop scissors fiberglass second problem has trimming excess material joint line mold epoxy reaches rubbery stage No less dozen single-edge razor blades used trim mold edgedoing job fiber glass usually takes four third problem has fact Kevlar does become transparent saturat ed epoxy lack transparency makes difficult see eliminate air bubbles laminate fourth problem Kevlar cant sanded just fuzzes gets annoying mess comparison two fuselages made after respective halves joined fiber glass weighed exactly 11 oz Kevlar fuse weighed 75 oz 35-oz difference repre sents 32% reduction weight cer tainly significant next question two fuselages equivalent strength stiffness measure 160 Model Aviation STEEL CANOPY FRAMEWORKS information send SASE call us 017W j 145 scale GROB 109 payng ENG 45 60 4CwlEnya 45 4CCont US ENG 40 50 2C$29995 Call Write Free Brochure umms COD 209 526-3055 1313 Nina Court Modesto CA 95355
Edition: Model Aviation - 1988/06
Page Numbers: 85, 86, 87, 88, 89, 159, 160
NO OCR TEXT mile thethe reallsiug Robarta tidators UNel horns erasetting -I system uses ma line connecta seethstiutas Motuators Lii e exi waiAMA - *4 IfU rfJJ don placed ci m precisi sted under thean 1 filled four se 86 stem overflow also eec door main quired maneuvers whee store gear 00 dual a1 auju ang List U ad -s ith h wered ar ex June 1988 87 y DCI exb dse reti Fron Th II j-t II [ ounity ge kee1 xation oft] imp Rob tmc 7/ iravi pipe IAEMOiW odahffA doors havebar exhaustud both trair atioui ervos next ik over st commerci fit bc ity NO OCR TEXT AVAILABLE IN 4-COLORS. Red Yellow White Black 468 Helicopter Tail Rotor Blade Covering 7/8 x 9 469 Helicopter Tail Rotor Blade Covering 7/8 x 9 470 Helicopter Tail Rotor Blade Covering 7/8 x 9 471 Helicopter Tail Rotor Blade Covering 7/8 x 9 472 Helicopter Tail Rotor Blade Covering 1-7/16x 12 473 Helicopter Tail Rotor Blade Covering 1-7/16x 12 474 Helicopter Tail Rotor Blade Covering 1-7/16x 12 475 HelicopterTail Rotor Blade Covering 1-7/16x 12 476 Helicopter Main Rotor Blade Covering 2 x 48 477 Heiicooter Main Rotor Blade Covering 2 x 48 Obsession/Hodgson Continued page 89 servo door servo reaches end its travelie doors fully openedthe limit switch connects wheel servo tripped wheels lowered retract command activates reverse sequence wheels fully retracted wheel retract servo limit switch tripped door servo acti vated close doors Landing gear doors Heres fund ingenuity really taxed ground rules doors should precision fitted hinges should hidden followed hinges have remote locations main gear doors hinges located back inside wing about inch doors arrangement allows doors rotate also immediately clear wing surface opening begins solution locating front gear door hinges less straightforward cause double curvature clam shell doors remote hinging would have least inch doors hinges would interfere other fuselage Since fuse lage wide enough accommodate HEAT SHRINKABLE 4 MILTHICK FILM EASY TO FOLLOW INSTRUCTIONS 478 Helicopter Main Rotor Blade Covering 2 x 48 479 Helicopter Main Rotor Blade Covering 2 x 48 480 Helicopter Main Rotor Blade Covering 2-112x 60 481 Helicopter Main Rotor Blade Covering 2-1/2x 60 482 Helicopter Main Rotor Blade Covering 2-1/2x 60 483 Helicopter Main Rotor Blade Covering 2-1/2 x 60 484 Helicopter Main Rotor Blade Covering 3-1/4 x 60 485 Helicopter Main Rotor Blade Covering 3-1/4x 60 486 Helicopter Main Rotor Blade Covering 3-1/4x 60 487 Helicopter Main Rotor Blade Covering 3-114x 60 required remote hinge locations alter nate scheme devised answer make hinges selves movable four hinges doors built concentric aluminum tubing sliders doors actuated open position first motion oc curs hinge movement doors simply move away fuselage about /8 beginning rotational motion As actuation continues doors rotate open position Upon closing se quence reverses doors first rotate closed position move uni son /8 until theyre flush fuse lage main gear doors achieving proper door travel required some special mechanisms lever arm spans distance between hinge actu ation cable attachment point made ad justable door adjustment con trols magnitude angle door sweeps second adjustment varies length actuation cable providing control door stopping position Simul taneously setting adjustments regu lates arc door travel closed open positions front gear doors required no special method adjustment Excess motion available ab sorbed spring linkage actuation cable doors lock once reach fully open position done ensure wind loading could accidentally partially close door prevent wheel retrac tion main gear doors lock open gravity-actuated lock deactivated wheels reach full re tract position front door lock little elaborate clamshell sections have spring-loaded pins slide po sition doors fully open pins withdrawn action front wheel retraction An unexpected problem discovered inboard main gear doors could opened far enough because extending belly pan Either entire retract system moved folding section adjacent belly pan incorporated inboard door latter design se lected Hinging doors simple enough having fold unfold just right point another matter folding action required hinged sec tion have actuator would push dur ing part door travel reach point would pull remainder door motion necessary dual action achieved actuators have two internal springs pretoaded compression other preloaded tension results excellent about three-quarters door opening motion no door folding occurs point doors rapidly fold remain folded rest open ing motion converse actions occur Continued page 160 June 1988 159 WITH EASY TO APPLY HELICOPTER BLADE COVERING FIVE SIZES AVAILABLE 7/8 x 9 1-7/1 6x 12 2x 48 2-1 /2x 60 3-1/4x 60 WhtRed BIkYel RedWht YelBIk WhtRed BIkYel RedWht YelBIk WhtRed 81kYeI Ryan AQM-34Q Teledyne-Ryan YQM-98A AC Models SHOCK ABSORBING STRUTS* WS Jerday Inc dba Impact Engineering 2100 Stonehill Court Arlington TX 76012 817 261-8130 * Patents Pending K doors close Building Pattern plane intricate obviously took time imagination patience article Ive covered significant design features volved whole project has de scribed challenging fun step enjoyable came retrospect though wouldnt want again ticipate building planes now aspirations will conventional RC Soaring/Blakeslee Continued page 39 Jack Hiner 2213 Prentis Creek A104 Downers Grove IL 60516 can call Jack 312 8520154 Kevlar Sailpianes Last month John Wyss de scribed new Multiplex Royal radio month discusses experiments using Keviar construct latest F3B ship Eclipse Take John Kevlar has gained popularity material Sailplane fuselages place fiberglass So what Kevlar aramid fiber produced DuPont originally developed belting material automobile tires woven types fabrics similar way fiber glass cloth has made can used place fiberglass making almost part Kevlar has higher tensile strength higher tensile modulus lower density fiber glass other words stronger lighter fiberglass does have some negative pects has lower compressional strength expensive works poorly polyester res ins general difficult work fiberglass better understand Kevlar two Eclipse fu selages laid up using same mold used multiple layers E-type fiberglass other used multiple layers Kevlar Both laid up using Safe-T-Poxy epoxy resin Three problems encountered using Key lar First Kevlar difficult cut shop scis sors used cut fiberglass would cut Key lar pizza-wheel fiberglass cutter also unsuccessful special expensive set shears designed use Kevlar worked rea sonably well nicely shop scissors fiberglass second problem has trimming excess material joint line mold epoxy reaches rubbery stage No less dozen single-edge razor blades used trim mold edgedoing job fiber glass usually takes four third problem has fact Kevlar does become transparent saturat ed epoxy lack transparency makes difficult see eliminate air bubbles laminate fourth problem Kevlar cant sanded just fuzzes gets annoying mess comparison two fuselages made after respective halves joined fiber glass weighed exactly 11 oz Kevlar fuse weighed 75 oz 35-oz difference repre sents 32% reduction weight cer tainly significant next question two fuselages equivalent strength stiffness measure 160 Model Aviation STEEL CANOPY FRAMEWORKS information send SASE call us 017W j 145 scale GROB 109 payng ENG 45 60 4CwlEnya 45 4CCont US ENG 40 50 2C$29995 Call Write Free Brochure umms COD 209 526-3055 1313 Nina Court Modesto CA 95355
Edition: Model Aviation - 1988/06
Page Numbers: 85, 86, 87, 88, 89, 159, 160
NO OCR TEXT mile thethe reallsiug Robarta tidators UNel horns erasetting -I system uses ma line connecta seethstiutas Motuators Lii e exi waiAMA - *4 IfU rfJJ don placed ci m precisi sted under thean 1 filled four se 86 stem overflow also eec door main quired maneuvers whee store gear 00 dual a1 auju ang List U ad -s ith h wered ar ex June 1988 87 y DCI exb dse reti Fron Th II j-t II [ ounity ge kee1 xation oft] imp Rob tmc 7/ iravi pipe IAEMOiW odahffA doors havebar exhaustud both trair atioui ervos next ik over st commerci fit bc ity NO OCR TEXT AVAILABLE IN 4-COLORS. Red Yellow White Black 468 Helicopter Tail Rotor Blade Covering 7/8 x 9 469 Helicopter Tail Rotor Blade Covering 7/8 x 9 470 Helicopter Tail Rotor Blade Covering 7/8 x 9 471 Helicopter Tail Rotor Blade Covering 7/8 x 9 472 Helicopter Tail Rotor Blade Covering 1-7/16x 12 473 Helicopter Tail Rotor Blade Covering 1-7/16x 12 474 Helicopter Tail Rotor Blade Covering 1-7/16x 12 475 HelicopterTail Rotor Blade Covering 1-7/16x 12 476 Helicopter Main Rotor Blade Covering 2 x 48 477 Heiicooter Main Rotor Blade Covering 2 x 48 Obsession/Hodgson Continued page 89 servo door servo reaches end its travelie doors fully openedthe limit switch connects wheel servo tripped wheels lowered retract command activates reverse sequence wheels fully retracted wheel retract servo limit switch tripped door servo acti vated close doors Landing gear doors Heres fund ingenuity really taxed ground rules doors should precision fitted hinges should hidden followed hinges have remote locations main gear doors hinges located back inside wing about inch doors arrangement allows doors rotate also immediately clear wing surface opening begins solution locating front gear door hinges less straightforward cause double curvature clam shell doors remote hinging would have least inch doors hinges would interfere other fuselage Since fuse lage wide enough accommodate HEAT SHRINKABLE 4 MILTHICK FILM EASY TO FOLLOW INSTRUCTIONS 478 Helicopter Main Rotor Blade Covering 2 x 48 479 Helicopter Main Rotor Blade Covering 2 x 48 480 Helicopter Main Rotor Blade Covering 2-112x 60 481 Helicopter Main Rotor Blade Covering 2-1/2x 60 482 Helicopter Main Rotor Blade Covering 2-1/2x 60 483 Helicopter Main Rotor Blade Covering 2-1/2 x 60 484 Helicopter Main Rotor Blade Covering 3-1/4 x 60 485 Helicopter Main Rotor Blade Covering 3-1/4x 60 486 Helicopter Main Rotor Blade Covering 3-1/4x 60 487 Helicopter Main Rotor Blade Covering 3-114x 60 required remote hinge locations alter nate scheme devised answer make hinges selves movable four hinges doors built concentric aluminum tubing sliders doors actuated open position first motion oc curs hinge movement doors simply move away fuselage about /8 beginning rotational motion As actuation continues doors rotate open position Upon closing se quence reverses doors first rotate closed position move uni son /8 until theyre flush fuse lage main gear doors achieving proper door travel required some special mechanisms lever arm spans distance between hinge actu ation cable attachment point made ad justable door adjustment con trols magnitude angle door sweeps second adjustment varies length actuation cable providing control door stopping position Simul taneously setting adjustments regu lates arc door travel closed open positions front gear doors required no special method adjustment Excess motion available ab sorbed spring linkage actuation cable doors lock once reach fully open position done ensure wind loading could accidentally partially close door prevent wheel retrac tion main gear doors lock open gravity-actuated lock deactivated wheels reach full re tract position front door lock little elaborate clamshell sections have spring-loaded pins slide po sition doors fully open pins withdrawn action front wheel retraction An unexpected problem discovered inboard main gear doors could opened far enough because extending belly pan Either entire retract system moved folding section adjacent belly pan incorporated inboard door latter design se lected Hinging doors simple enough having fold unfold just right point another matter folding action required hinged sec tion have actuator would push dur ing part door travel reach point would pull remainder door motion necessary dual action achieved actuators have two internal springs pretoaded compression other preloaded tension results excellent about three-quarters door opening motion no door folding occurs point doors rapidly fold remain folded rest open ing motion converse actions occur Continued page 160 June 1988 159 WITH EASY TO APPLY HELICOPTER BLADE COVERING FIVE SIZES AVAILABLE 7/8 x 9 1-7/1 6x 12 2x 48 2-1 /2x 60 3-1/4x 60 WhtRed BIkYel RedWht YelBIk WhtRed BIkYel RedWht YelBIk WhtRed 81kYeI Ryan AQM-34Q Teledyne-Ryan YQM-98A AC Models SHOCK ABSORBING STRUTS* WS Jerday Inc dba Impact Engineering 2100 Stonehill Court Arlington TX 76012 817 261-8130 * Patents Pending K doors close Building Pattern plane intricate obviously took time imagination patience article Ive covered significant design features volved whole project has de scribed challenging fun step enjoyable came retrospect though wouldnt want again ticipate building planes now aspirations will conventional RC Soaring/Blakeslee Continued page 39 Jack Hiner 2213 Prentis Creek A104 Downers Grove IL 60516 can call Jack 312 8520154 Kevlar Sailpianes Last month John Wyss de scribed new Multiplex Royal radio month discusses experiments using Keviar construct latest F3B ship Eclipse Take John Kevlar has gained popularity material Sailplane fuselages place fiberglass So what Kevlar aramid fiber produced DuPont originally developed belting material automobile tires woven types fabrics similar way fiber glass cloth has made can used place fiberglass making almost part Kevlar has higher tensile strength higher tensile modulus lower density fiber glass other words stronger lighter fiberglass does have some negative pects has lower compressional strength expensive works poorly polyester res ins general difficult work fiberglass better understand Kevlar two Eclipse fu selages laid up using same mold used multiple layers E-type fiberglass other used multiple layers Kevlar Both laid up using Safe-T-Poxy epoxy resin Three problems encountered using Key lar First Kevlar difficult cut shop scis sors used cut fiberglass would cut Key lar pizza-wheel fiberglass cutter also unsuccessful special expensive set shears designed use Kevlar worked rea sonably well nicely shop scissors fiberglass second problem has trimming excess material joint line mold epoxy reaches rubbery stage No less dozen single-edge razor blades used trim mold edgedoing job fiber glass usually takes four third problem has fact Kevlar does become transparent saturat ed epoxy lack transparency makes difficult see eliminate air bubbles laminate fourth problem Kevlar cant sanded just fuzzes gets annoying mess comparison two fuselages made after respective halves joined fiber glass weighed exactly 11 oz Kevlar fuse weighed 75 oz 35-oz difference repre sents 32% reduction weight cer tainly significant next question two fuselages equivalent strength stiffness measure 160 Model Aviation STEEL CANOPY FRAMEWORKS information send SASE call us 017W j 145 scale GROB 109 payng ENG 45 60 4CwlEnya 45 4CCont US ENG 40 50 2C$29995 Call Write Free Brochure umms COD 209 526-3055 1313 Nina Court Modesto CA 95355
Edition: Model Aviation - 1988/06
Page Numbers: 85, 86, 87, 88, 89, 159, 160
NO OCR TEXT mile thethe reallsiug Robarta tidators UNel horns erasetting -I system uses ma line connecta seethstiutas Motuators Lii e exi waiAMA - *4 IfU rfJJ don placed ci m precisi sted under thean 1 filled four se 86 stem overflow also eec door main quired maneuvers whee store gear 00 dual a1 auju ang List U ad -s ith h wered ar ex June 1988 87 y DCI exb dse reti Fron Th II j-t II [ ounity ge kee1 xation oft] imp Rob tmc 7/ iravi pipe IAEMOiW odahffA doors havebar exhaustud both trair atioui ervos next ik over st commerci fit bc ity NO OCR TEXT AVAILABLE IN 4-COLORS. Red Yellow White Black 468 Helicopter Tail Rotor Blade Covering 7/8 x 9 469 Helicopter Tail Rotor Blade Covering 7/8 x 9 470 Helicopter Tail Rotor Blade Covering 7/8 x 9 471 Helicopter Tail Rotor Blade Covering 7/8 x 9 472 Helicopter Tail Rotor Blade Covering 1-7/16x 12 473 Helicopter Tail Rotor Blade Covering 1-7/16x 12 474 Helicopter Tail Rotor Blade Covering 1-7/16x 12 475 HelicopterTail Rotor Blade Covering 1-7/16x 12 476 Helicopter Main Rotor Blade Covering 2 x 48 477 Heiicooter Main Rotor Blade Covering 2 x 48 Obsession/Hodgson Continued page 89 servo door servo reaches end its travelie doors fully openedthe limit switch connects wheel servo tripped wheels lowered retract command activates reverse sequence wheels fully retracted wheel retract servo limit switch tripped door servo acti vated close doors Landing gear doors Heres fund ingenuity really taxed ground rules doors should precision fitted hinges should hidden followed hinges have remote locations main gear doors hinges located back inside wing about inch doors arrangement allows doors rotate also immediately clear wing surface opening begins solution locating front gear door hinges less straightforward cause double curvature clam shell doors remote hinging would have least inch doors hinges would interfere other fuselage Since fuse lage wide enough accommodate HEAT SHRINKABLE 4 MILTHICK FILM EASY TO FOLLOW INSTRUCTIONS 478 Helicopter Main Rotor Blade Covering 2 x 48 479 Helicopter Main Rotor Blade Covering 2 x 48 480 Helicopter Main Rotor Blade Covering 2-112x 60 481 Helicopter Main Rotor Blade Covering 2-1/2x 60 482 Helicopter Main Rotor Blade Covering 2-1/2x 60 483 Helicopter Main Rotor Blade Covering 2-1/2 x 60 484 Helicopter Main Rotor Blade Covering 3-1/4 x 60 485 Helicopter Main Rotor Blade Covering 3-1/4x 60 486 Helicopter Main Rotor Blade Covering 3-1/4x 60 487 Helicopter Main Rotor Blade Covering 3-114x 60 required remote hinge locations alter nate scheme devised answer make hinges selves movable four hinges doors built concentric aluminum tubing sliders doors actuated open position first motion oc curs hinge movement doors simply move away fuselage about /8 beginning rotational motion As actuation continues doors rotate open position Upon closing se quence reverses doors first rotate closed position move uni son /8 until theyre flush fuse lage main gear doors achieving proper door travel required some special mechanisms lever arm spans distance between hinge actu ation cable attachment point made ad justable door adjustment con trols magnitude angle door sweeps second adjustment varies length actuation cable providing control door stopping position Simul taneously setting adjustments regu lates arc door travel closed open positions front gear doors required no special method adjustment Excess motion available ab sorbed spring linkage actuation cable doors lock once reach fully open position done ensure wind loading could accidentally partially close door prevent wheel retrac tion main gear doors lock open gravity-actuated lock deactivated wheels reach full re tract position front door lock little elaborate clamshell sections have spring-loaded pins slide po sition doors fully open pins withdrawn action front wheel retraction An unexpected problem discovered inboard main gear doors could opened far enough because extending belly pan Either entire retract system moved folding section adjacent belly pan incorporated inboard door latter design se lected Hinging doors simple enough having fold unfold just right point another matter folding action required hinged sec tion have actuator would push dur ing part door travel reach point would pull remainder door motion necessary dual action achieved actuators have two internal springs pretoaded compression other preloaded tension results excellent about three-quarters door opening motion no door folding occurs point doors rapidly fold remain folded rest open ing motion converse actions occur Continued page 160 June 1988 159 WITH EASY TO APPLY HELICOPTER BLADE COVERING FIVE SIZES AVAILABLE 7/8 x 9 1-7/1 6x 12 2x 48 2-1 /2x 60 3-1/4x 60 WhtRed BIkYel RedWht YelBIk WhtRed BIkYel RedWht YelBIk WhtRed 81kYeI Ryan AQM-34Q Teledyne-Ryan YQM-98A AC Models SHOCK ABSORBING STRUTS* WS Jerday Inc dba Impact Engineering 2100 Stonehill Court Arlington TX 76012 817 261-8130 * Patents Pending K doors close Building Pattern plane intricate obviously took time imagination patience article Ive covered significant design features volved whole project has de scribed challenging fun step enjoyable came retrospect though wouldnt want again ticipate building planes now aspirations will conventional RC Soaring/Blakeslee Continued page 39 Jack Hiner 2213 Prentis Creek A104 Downers Grove IL 60516 can call Jack 312 8520154 Kevlar Sailpianes Last month John Wyss de scribed new Multiplex Royal radio month discusses experiments using Keviar construct latest F3B ship Eclipse Take John Kevlar has gained popularity material Sailplane fuselages place fiberglass So what Kevlar aramid fiber produced DuPont originally developed belting material automobile tires woven types fabrics similar way fiber glass cloth has made can used place fiberglass making almost part Kevlar has higher tensile strength higher tensile modulus lower density fiber glass other words stronger lighter fiberglass does have some negative pects has lower compressional strength expensive works poorly polyester res ins general difficult work fiberglass better understand Kevlar two Eclipse fu selages laid up using same mold used multiple layers E-type fiberglass other used multiple layers Kevlar Both laid up using Safe-T-Poxy epoxy resin Three problems encountered using Key lar First Kevlar difficult cut shop scis sors used cut fiberglass would cut Key lar pizza-wheel fiberglass cutter also unsuccessful special expensive set shears designed use Kevlar worked rea sonably well nicely shop scissors fiberglass second problem has trimming excess material joint line mold epoxy reaches rubbery stage No less dozen single-edge razor blades used trim mold edgedoing job fiber glass usually takes four third problem has fact Kevlar does become transparent saturat ed epoxy lack transparency makes difficult see eliminate air bubbles laminate fourth problem Kevlar cant sanded just fuzzes gets annoying mess comparison two fuselages made after respective halves joined fiber glass weighed exactly 11 oz Kevlar fuse weighed 75 oz 35-oz difference repre sents 32% reduction weight cer tainly significant next question two fuselages equivalent strength stiffness measure 160 Model Aviation STEEL CANOPY FRAMEWORKS information send SASE call us 017W j 145 scale GROB 109 payng ENG 45 60 4CwlEnya 45 4CCont US ENG 40 50 2C$29995 Call Write Free Brochure umms COD 209 526-3055 1313 Nina Court Modesto CA 95355