SCALE SCRATCH-BUILDING FROM PAPER U Ken Long YEARS AGO brother 14 12 hit idea building airplanes using Tinker ToyTM frames cutting pasting various thickness paper magazines covers cereal boxes course models too flimsy fly thought looked greatand lot fun creating something brother After 40-plus years building stick-and-tissue balsa plastic foam airplanes mostly Control Line Scale decided try paper once again built several practice models corrugated paper box material flew well covering outside material scored inside go around curve produced octagonal look rather smoothly contoured surface lead idea using paper various calipers thicknesses weights produce Scale model would closely resemble subject prototype basic construction much same built-up balsa substituting fuselage formers wing ribs corrugated paper box material covering various thicknesses paper Some advantages type construction relatively inexpensive can put surface detail model build panel lines rivets access panels makes durable model ways stronger other forms construction Choose subject has high percentage straight fine curves low percentage compound curves P-47 its barrel-shaped fuselage would make good subject Hellcat would excellent aluminum-skinned aircraft both civil military could modeled paper choose Ju-87D Stuka first paper Sport Scale project has 60-inch wingspan Flying weight just six pounds agile enough wingover has flown 50 times has won five major contests including Nationals Regionals Materials frame sheets cut corrugated paper boxes used Work idea everything balance point forward heavy strong everything rear light possible strong needed corrugated paper boxes arc made what known C flute groove other thickness averages about /I6 thick depending caliper paper used its construction desirable frame construction measure thickness need make fresh cut edges box tend get mashed down manufacturing box used hold heavy appliance such TV washing machine made heavy corrugated can used cutting out fuselage formers forward balance point Firewalls engine mounts bellcrank mounts wing spars some wing ribs strength needed can cut heavy corrugated Lightweight corrugated paper framework rear balance point can obtained large master cartons used light products such potato chips paper towels Most corrugated paper boxes have box makers certificate stamp bottom will tell test purposes August 1998 79 Wing covering 69-pound prefinished card stock panels Cross-frame construction forward fuselage Tabs slots Finish Krylon spray Rivet procedure detailed text lock pieces together Top covering completes job 250- to 350-pound test would considered heavy 150- 200-pound test would considered light will need supply white paper glue such Elmers GlueAllTM fiveminute epoxy 30-minute epoxy Tools may normally use good sharp pair scissors Stanley box knife metal straightedge Two basic types construction lend themselves well paper cross frame box frame cross frame made cutting out full side-view piece including rudder heavy corrugated paper box material cut top view halves minus thickness side view Now cut out former halves Partition-cut slotting halfway through slot top view pieces halfway through opposite way Assemble fuselage parts glue together box frame made calculating what four points rectangle would bisect firewall nose former Calculate what four points rectangle would bisect tail former usually last former before rudder aircraft Draw straight lines points front back Cut sides top bottom heavy corrugated paper box material glue together making sure square forms box frame fuselage foundation Now formers can glued top bottom sides using plans plan service cross box construction can calculated some plans already feature box construction either type construction may need add formers Two inches apart about right spacing prevent crimping denting paper covering Wing construction can done ribs spars cut corrugated paper box material Spars need wider plans show main spars can way through ribs deep-slotting ribs shallow-slotting spar Main spars also need made thicker laminating three thicknesses depending scale model Rib spacing should no two inches Make ribs heavy corrugated first few bays fuselage aircraft has wing-mounted landing gear use heavy until just past gear use light out wingtips Cutting ribs alignment tabs good way make sure wing true After top wing covered tabs can cut off Rudder Stab built up rudder half-ribs side piece corrugated cut outline rudder covered rudder card stock using fuselage cross-frame construction rudder can part side view cutout stab can constructed same way rudder wing building stab /2 inch thick building smaller scale will necessary make stab elevator some balsa Lite Ply stiffeners prevent warps Solid light balsa cut sanded shape 80 Model Aviation ors CL Sport Scale Stuka has 60-inch wingspan weighs six pounds has 50 flights Model has success local national levels CROSS FRAME BOX FRAME covered light card stock works well get down /s thickness range Covering main paper use heavy stock 69 pounds per 1000 square feet about 016 thick its paper used construct 275-pound-test corrugated boxes virgin paper fibers longmaking very tough strong havent found paper sale commercially have testing various weights card stock light poster paper readily available paper supply stores found some about same weight thickness 69-pound stock look good far flight- time-tested yet Sport Scale plotted approximate location panels placed formers ribs points covering overlapped paper about 3/ inch creating scale look necessary Sport Scale may saying lines can seen 15 feet away think makes favorable impression judges Precision FAI Scale Im using 69-pound covering large area possible cover tooled thinner card stock cut exact sizes prototypes panels Panels can overlapped butted together space betweenwhatever correct aircraft Most heavy paper can tooled much like leather paper tooled painted properly hard tell riveted aluminum aircraft skin rounded raised rivets use sewing tracing wheels can use stock wheel closely spaced rivets cut off other tooth second wheel rivet spacing farther apart After measuring cutting panel size draw pencil lines rivet locations inside panel Place piece scrap heavy paper hard surface act pad penciled inside surface up place panel scrap paper follow pencil lines sewing wheel pushing down hard will make raised rivets outer surface flush-fitting rivets can use small brass tubes /16 OD works well can put time sucker punishment can make wheel like sewing wheel using brass tubing Basically its soft metal disk about 3/4 diameter drilled around circumference /is holes Force-fit short pieces /16 brass tubing holes drill hole center disk bolt screw will act axle wheel Attach handle wood metal tool can used roll simulated flush rivets outside surface paper panel just few minutes Round access panels can made putting end metal tube proper place panel tapping other end hammer will leave permanent impression paper sharpened edge metal thimble file used tool Use scrap piece paper cut out pattern Test frame trim exact size shape can cut out panel pattern Test again before tooling make sure fits may necessary make some adjustment frame bridging three ribs formers single panel Check frame holding place looking high low formers ribs have high spot sand down check straightedge laid across area bridged have low formers ribs cut piece corrugated paper glue side low area Never try force panel compound curve will glue properly former usually wont look good bulges ripples prototype has slight compound curve over long span can simulated sharp change angle enough natural panel lines put extra panels obscure line using filler coat sanding model has straight trailing edges wings tail can fold paper panel covering simply score want trailing edge use Stanley razor knife handle put paper covering hard flat surface inside up Stanley blade closed run pointed end along premeasured trailing edge line pressing hard edge can folded scored line Glue directly corrugated paper ribs folded-over heavy paper will hold straight edge will closely resemble aluminumskinned trailing edge prototype Wherever sharply rounded contour needed leading edge wing rudder stab may necessary wet inside area paper covering panel rolled around ribs shaped edge will prevent crimping false scores should end up smoothly contoured surface Wetting will interfere gluing water-based white glue Gluing Elmers Glue-AllTM waterproof neither paper must rely finishing material fuelproof waterproof model thin film bead works best gluing outside paper panels apply bead glue near edge run finger over bead press little harder edge prevent bleed-out Keep damp cloth handy wipe off excess White glue normally takes hours dry will bond paper 20-30 seconds compression used frame covering can glued together using method can use pins low-tack tape compression works best gluing long straight line such along wing can use metal straightedge wood stick press glue joint bond construction engine mounts firewalls landing gear mounts servo mounts bellerank mounts other place would use plywood hardwood laminate layers heavy corrugated paper box material epoxy heavy plywood hardwood used can pour flutes laminating layers heavy corrugated paper box materials solid epoxy hardened can drilled mounting bolts As conventional forms construction coat internal compartments may come contact fuel epoxy Compound Curves want purist use paper much model possible can make small percentage compound curves papier mache good article written making parts model July 1992 Model Aviation Make Paper Roy Day Marion Mecklenburg Canopy 69-pound paper works well Paint inside sheet color cockpit Paint outside color exterior aircraft Mark off pencil line strips canopy frame Tool raised flush rivets Cut strips mark canopy strips go epoxy place Finish Start three coats clear dope sanding lightly between coats Apply clear heavy coats especially panel joints dope will soak seal Follow two coats sprayed-on color used balsa compound curves small parts will need plenty filler dope paint match already smooth paper am primarily Control Line Scale modeler have done enough Radio Control work know paper construction would work RC Scale well Once get hang it can faster other forms scratchbuilding treat paper would more-expensive building materialcutting shaping close tolerances-I think will find results rewarding challenge other scratch builders have go Long 10911 Arroyo Dr Whittier CA 90604 82 Model Aviation
Edition: Model Aviation - 1998/08
Page Numbers: 79, 80, 82
SCALE SCRATCH-BUILDING FROM PAPER U Ken Long YEARS AGO brother 14 12 hit idea building airplanes using Tinker ToyTM frames cutting pasting various thickness paper magazines covers cereal boxes course models too flimsy fly thought looked greatand lot fun creating something brother After 40-plus years building stick-and-tissue balsa plastic foam airplanes mostly Control Line Scale decided try paper once again built several practice models corrugated paper box material flew well covering outside material scored inside go around curve produced octagonal look rather smoothly contoured surface lead idea using paper various calipers thicknesses weights produce Scale model would closely resemble subject prototype basic construction much same built-up balsa substituting fuselage formers wing ribs corrugated paper box material covering various thicknesses paper Some advantages type construction relatively inexpensive can put surface detail model build panel lines rivets access panels makes durable model ways stronger other forms construction Choose subject has high percentage straight fine curves low percentage compound curves P-47 its barrel-shaped fuselage would make good subject Hellcat would excellent aluminum-skinned aircraft both civil military could modeled paper choose Ju-87D Stuka first paper Sport Scale project has 60-inch wingspan Flying weight just six pounds agile enough wingover has flown 50 times has won five major contests including Nationals Regionals Materials frame sheets cut corrugated paper boxes used Work idea everything balance point forward heavy strong everything rear light possible strong needed corrugated paper boxes arc made what known C flute groove other thickness averages about /I6 thick depending caliper paper used its construction desirable frame construction measure thickness need make fresh cut edges box tend get mashed down manufacturing box used hold heavy appliance such TV washing machine made heavy corrugated can used cutting out fuselage formers forward balance point Firewalls engine mounts bellcrank mounts wing spars some wing ribs strength needed can cut heavy corrugated Lightweight corrugated paper framework rear balance point can obtained large master cartons used light products such potato chips paper towels Most corrugated paper boxes have box makers certificate stamp bottom will tell test purposes August 1998 79 Wing covering 69-pound prefinished card stock panels Cross-frame construction forward fuselage Tabs slots Finish Krylon spray Rivet procedure detailed text lock pieces together Top covering completes job 250- to 350-pound test would considered heavy 150- 200-pound test would considered light will need supply white paper glue such Elmers GlueAllTM fiveminute epoxy 30-minute epoxy Tools may normally use good sharp pair scissors Stanley box knife metal straightedge Two basic types construction lend themselves well paper cross frame box frame cross frame made cutting out full side-view piece including rudder heavy corrugated paper box material cut top view halves minus thickness side view Now cut out former halves Partition-cut slotting halfway through slot top view pieces halfway through opposite way Assemble fuselage parts glue together box frame made calculating what four points rectangle would bisect firewall nose former Calculate what four points rectangle would bisect tail former usually last former before rudder aircraft Draw straight lines points front back Cut sides top bottom heavy corrugated paper box material glue together making sure square forms box frame fuselage foundation Now formers can glued top bottom sides using plans plan service cross box construction can calculated some plans already feature box construction either type construction may need add formers Two inches apart about right spacing prevent crimping denting paper covering Wing construction can done ribs spars cut corrugated paper box material Spars need wider plans show main spars can way through ribs deep-slotting ribs shallow-slotting spar Main spars also need made thicker laminating three thicknesses depending scale model Rib spacing should no two inches Make ribs heavy corrugated first few bays fuselage aircraft has wing-mounted landing gear use heavy until just past gear use light out wingtips Cutting ribs alignment tabs good way make sure wing true After top wing covered tabs can cut off Rudder Stab built up rudder half-ribs side piece corrugated cut outline rudder covered rudder card stock using fuselage cross-frame construction rudder can part side view cutout stab can constructed same way rudder wing building stab /2 inch thick building smaller scale will necessary make stab elevator some balsa Lite Ply stiffeners prevent warps Solid light balsa cut sanded shape 80 Model Aviation ors CL Sport Scale Stuka has 60-inch wingspan weighs six pounds has 50 flights Model has success local national levels CROSS FRAME BOX FRAME covered light card stock works well get down /s thickness range Covering main paper use heavy stock 69 pounds per 1000 square feet about 016 thick its paper used construct 275-pound-test corrugated boxes virgin paper fibers longmaking very tough strong havent found paper sale commercially have testing various weights card stock light poster paper readily available paper supply stores found some about same weight thickness 69-pound stock look good far flight- time-tested yet Sport Scale plotted approximate location panels placed formers ribs points covering overlapped paper about 3/ inch creating scale look necessary Sport Scale may saying lines can seen 15 feet away think makes favorable impression judges Precision FAI Scale Im using 69-pound covering large area possible cover tooled thinner card stock cut exact sizes prototypes panels Panels can overlapped butted together space betweenwhatever correct aircraft Most heavy paper can tooled much like leather paper tooled painted properly hard tell riveted aluminum aircraft skin rounded raised rivets use sewing tracing wheels can use stock wheel closely spaced rivets cut off other tooth second wheel rivet spacing farther apart After measuring cutting panel size draw pencil lines rivet locations inside panel Place piece scrap heavy paper hard surface act pad penciled inside surface up place panel scrap paper follow pencil lines sewing wheel pushing down hard will make raised rivets outer surface flush-fitting rivets can use small brass tubes /16 OD works well can put time sucker punishment can make wheel like sewing wheel using brass tubing Basically its soft metal disk about 3/4 diameter drilled around circumference /is holes Force-fit short pieces /16 brass tubing holes drill hole center disk bolt screw will act axle wheel Attach handle wood metal tool can used roll simulated flush rivets outside surface paper panel just few minutes Round access panels can made putting end metal tube proper place panel tapping other end hammer will leave permanent impression paper sharpened edge metal thimble file used tool Use scrap piece paper cut out pattern Test frame trim exact size shape can cut out panel pattern Test again before tooling make sure fits may necessary make some adjustment frame bridging three ribs formers single panel Check frame holding place looking high low formers ribs have high spot sand down check straightedge laid across area bridged have low formers ribs cut piece corrugated paper glue side low area Never try force panel compound curve will glue properly former usually wont look good bulges ripples prototype has slight compound curve over long span can simulated sharp change angle enough natural panel lines put extra panels obscure line using filler coat sanding model has straight trailing edges wings tail can fold paper panel covering simply score want trailing edge use Stanley razor knife handle put paper covering hard flat surface inside up Stanley blade closed run pointed end along premeasured trailing edge line pressing hard edge can folded scored line Glue directly corrugated paper ribs folded-over heavy paper will hold straight edge will closely resemble aluminumskinned trailing edge prototype Wherever sharply rounded contour needed leading edge wing rudder stab may necessary wet inside area paper covering panel rolled around ribs shaped edge will prevent crimping false scores should end up smoothly contoured surface Wetting will interfere gluing water-based white glue Gluing Elmers Glue-AllTM waterproof neither paper must rely finishing material fuelproof waterproof model thin film bead works best gluing outside paper panels apply bead glue near edge run finger over bead press little harder edge prevent bleed-out Keep damp cloth handy wipe off excess White glue normally takes hours dry will bond paper 20-30 seconds compression used frame covering can glued together using method can use pins low-tack tape compression works best gluing long straight line such along wing can use metal straightedge wood stick press glue joint bond construction engine mounts firewalls landing gear mounts servo mounts bellerank mounts other place would use plywood hardwood laminate layers heavy corrugated paper box material epoxy heavy plywood hardwood used can pour flutes laminating layers heavy corrugated paper box materials solid epoxy hardened can drilled mounting bolts As conventional forms construction coat internal compartments may come contact fuel epoxy Compound Curves want purist use paper much model possible can make small percentage compound curves papier mache good article written making parts model July 1992 Model Aviation Make Paper Roy Day Marion Mecklenburg Canopy 69-pound paper works well Paint inside sheet color cockpit Paint outside color exterior aircraft Mark off pencil line strips canopy frame Tool raised flush rivets Cut strips mark canopy strips go epoxy place Finish Start three coats clear dope sanding lightly between coats Apply clear heavy coats especially panel joints dope will soak seal Follow two coats sprayed-on color used balsa compound curves small parts will need plenty filler dope paint match already smooth paper am primarily Control Line Scale modeler have done enough Radio Control work know paper construction would work RC Scale well Once get hang it can faster other forms scratchbuilding treat paper would more-expensive building materialcutting shaping close tolerances-I think will find results rewarding challenge other scratch builders have go Long 10911 Arroyo Dr Whittier CA 90604 82 Model Aviation
Edition: Model Aviation - 1998/08
Page Numbers: 79, 80, 82
SCALE SCRATCH-BUILDING FROM PAPER U Ken Long YEARS AGO brother 14 12 hit idea building airplanes using Tinker ToyTM frames cutting pasting various thickness paper magazines covers cereal boxes course models too flimsy fly thought looked greatand lot fun creating something brother After 40-plus years building stick-and-tissue balsa plastic foam airplanes mostly Control Line Scale decided try paper once again built several practice models corrugated paper box material flew well covering outside material scored inside go around curve produced octagonal look rather smoothly contoured surface lead idea using paper various calipers thicknesses weights produce Scale model would closely resemble subject prototype basic construction much same built-up balsa substituting fuselage formers wing ribs corrugated paper box material covering various thicknesses paper Some advantages type construction relatively inexpensive can put surface detail model build panel lines rivets access panels makes durable model ways stronger other forms construction Choose subject has high percentage straight fine curves low percentage compound curves P-47 its barrel-shaped fuselage would make good subject Hellcat would excellent aluminum-skinned aircraft both civil military could modeled paper choose Ju-87D Stuka first paper Sport Scale project has 60-inch wingspan Flying weight just six pounds agile enough wingover has flown 50 times has won five major contests including Nationals Regionals Materials frame sheets cut corrugated paper boxes used Work idea everything balance point forward heavy strong everything rear light possible strong needed corrugated paper boxes arc made what known C flute groove other thickness averages about /I6 thick depending caliper paper used its construction desirable frame construction measure thickness need make fresh cut edges box tend get mashed down manufacturing box used hold heavy appliance such TV washing machine made heavy corrugated can used cutting out fuselage formers forward balance point Firewalls engine mounts bellcrank mounts wing spars some wing ribs strength needed can cut heavy corrugated Lightweight corrugated paper framework rear balance point can obtained large master cartons used light products such potato chips paper towels Most corrugated paper boxes have box makers certificate stamp bottom will tell test purposes August 1998 79 Wing covering 69-pound prefinished card stock panels Cross-frame construction forward fuselage Tabs slots Finish Krylon spray Rivet procedure detailed text lock pieces together Top covering completes job 250- to 350-pound test would considered heavy 150- 200-pound test would considered light will need supply white paper glue such Elmers GlueAllTM fiveminute epoxy 30-minute epoxy Tools may normally use good sharp pair scissors Stanley box knife metal straightedge Two basic types construction lend themselves well paper cross frame box frame cross frame made cutting out full side-view piece including rudder heavy corrugated paper box material cut top view halves minus thickness side view Now cut out former halves Partition-cut slotting halfway through slot top view pieces halfway through opposite way Assemble fuselage parts glue together box frame made calculating what four points rectangle would bisect firewall nose former Calculate what four points rectangle would bisect tail former usually last former before rudder aircraft Draw straight lines points front back Cut sides top bottom heavy corrugated paper box material glue together making sure square forms box frame fuselage foundation Now formers can glued top bottom sides using plans plan service cross box construction can calculated some plans already feature box construction either type construction may need add formers Two inches apart about right spacing prevent crimping denting paper covering Wing construction can done ribs spars cut corrugated paper box material Spars need wider plans show main spars can way through ribs deep-slotting ribs shallow-slotting spar Main spars also need made thicker laminating three thicknesses depending scale model Rib spacing should no two inches Make ribs heavy corrugated first few bays fuselage aircraft has wing-mounted landing gear use heavy until just past gear use light out wingtips Cutting ribs alignment tabs good way make sure wing true After top wing covered tabs can cut off Rudder Stab built up rudder half-ribs side piece corrugated cut outline rudder covered rudder card stock using fuselage cross-frame construction rudder can part side view cutout stab can constructed same way rudder wing building stab /2 inch thick building smaller scale will necessary make stab elevator some balsa Lite Ply stiffeners prevent warps Solid light balsa cut sanded shape 80 Model Aviation ors CL Sport Scale Stuka has 60-inch wingspan weighs six pounds has 50 flights Model has success local national levels CROSS FRAME BOX FRAME covered light card stock works well get down /s thickness range Covering main paper use heavy stock 69 pounds per 1000 square feet about 016 thick its paper used construct 275-pound-test corrugated boxes virgin paper fibers longmaking very tough strong havent found paper sale commercially have testing various weights card stock light poster paper readily available paper supply stores found some about same weight thickness 69-pound stock look good far flight- time-tested yet Sport Scale plotted approximate location panels placed formers ribs points covering overlapped paper about 3/ inch creating scale look necessary Sport Scale may saying lines can seen 15 feet away think makes favorable impression judges Precision FAI Scale Im using 69-pound covering large area possible cover tooled thinner card stock cut exact sizes prototypes panels Panels can overlapped butted together space betweenwhatever correct aircraft Most heavy paper can tooled much like leather paper tooled painted properly hard tell riveted aluminum aircraft skin rounded raised rivets use sewing tracing wheels can use stock wheel closely spaced rivets cut off other tooth second wheel rivet spacing farther apart After measuring cutting panel size draw pencil lines rivet locations inside panel Place piece scrap heavy paper hard surface act pad penciled inside surface up place panel scrap paper follow pencil lines sewing wheel pushing down hard will make raised rivets outer surface flush-fitting rivets can use small brass tubes /16 OD works well can put time sucker punishment can make wheel like sewing wheel using brass tubing Basically its soft metal disk about 3/4 diameter drilled around circumference /is holes Force-fit short pieces /16 brass tubing holes drill hole center disk bolt screw will act axle wheel Attach handle wood metal tool can used roll simulated flush rivets outside surface paper panel just few minutes Round access panels can made putting end metal tube proper place panel tapping other end hammer will leave permanent impression paper sharpened edge metal thimble file used tool Use scrap piece paper cut out pattern Test frame trim exact size shape can cut out panel pattern Test again before tooling make sure fits may necessary make some adjustment frame bridging three ribs formers single panel Check frame holding place looking high low formers ribs have high spot sand down check straightedge laid across area bridged have low formers ribs cut piece corrugated paper glue side low area Never try force panel compound curve will glue properly former usually wont look good bulges ripples prototype has slight compound curve over long span can simulated sharp change angle enough natural panel lines put extra panels obscure line using filler coat sanding model has straight trailing edges wings tail can fold paper panel covering simply score want trailing edge use Stanley razor knife handle put paper covering hard flat surface inside up Stanley blade closed run pointed end along premeasured trailing edge line pressing hard edge can folded scored line Glue directly corrugated paper ribs folded-over heavy paper will hold straight edge will closely resemble aluminumskinned trailing edge prototype Wherever sharply rounded contour needed leading edge wing rudder stab may necessary wet inside area paper covering panel rolled around ribs shaped edge will prevent crimping false scores should end up smoothly contoured surface Wetting will interfere gluing water-based white glue Gluing Elmers Glue-AllTM waterproof neither paper must rely finishing material fuelproof waterproof model thin film bead works best gluing outside paper panels apply bead glue near edge run finger over bead press little harder edge prevent bleed-out Keep damp cloth handy wipe off excess White glue normally takes hours dry will bond paper 20-30 seconds compression used frame covering can glued together using method can use pins low-tack tape compression works best gluing long straight line such along wing can use metal straightedge wood stick press glue joint bond construction engine mounts firewalls landing gear mounts servo mounts bellerank mounts other place would use plywood hardwood laminate layers heavy corrugated paper box material epoxy heavy plywood hardwood used can pour flutes laminating layers heavy corrugated paper box materials solid epoxy hardened can drilled mounting bolts As conventional forms construction coat internal compartments may come contact fuel epoxy Compound Curves want purist use paper much model possible can make small percentage compound curves papier mache good article written making parts model July 1992 Model Aviation Make Paper Roy Day Marion Mecklenburg Canopy 69-pound paper works well Paint inside sheet color cockpit Paint outside color exterior aircraft Mark off pencil line strips canopy frame Tool raised flush rivets Cut strips mark canopy strips go epoxy place Finish Start three coats clear dope sanding lightly between coats Apply clear heavy coats especially panel joints dope will soak seal Follow two coats sprayed-on color used balsa compound curves small parts will need plenty filler dope paint match already smooth paper am primarily Control Line Scale modeler have done enough Radio Control work know paper construction would work RC Scale well Once get hang it can faster other forms scratchbuilding treat paper would more-expensive building materialcutting shaping close tolerances-I think will find results rewarding challenge other scratch builders have go Long 10911 Arroyo Dr Whittier CA 90604 82 Model Aviation