Radio Control Sca1e Bob&DollyWischer SUPER-Efficient Airplanes annual Experimental Aircraft Association Fly-in Convention Oshkosh Wisconsin ideal place gather information seek inspiration new modeling proj ects connection convention contest conducted efficiency basis determine winners Originated Ladislao Pazmany designer PL-l PL-2 PL-4 Ryson Cloudster contest awards K factor com peting plane based its maximum minimum speeds engine power weight wing area using following formula K Vmax 35~W VminPS Vspeed Pengine horsepower Swing area W ht Flights made through 2000-foot speed trap order minimize effect wind flights made dawn planes carefully weighed fuel pilot passengers obvious Pazmany formula plane capable lifting large load has advantage permissible enter twice once pilot alone again loaded up its legal gross weight contest divided two sections factory-built planes other custom-made homebuilt designs Planes place high competition make excellent model subjects None have marginal load lifting capacity Because have wide spread between minimum maximum speeds can made excel flight realism Lately have hearing need scale speeds tain realistic appearance flight prototype capable speeds well excess 200 mph contest judges made aware fact can less fault found model flight speeds model weights kept reasonable level careful construction choice materials slow speeds can result gentle landings place controlled crash arrivals sometimes see Choosing efficient prototype flying low pitch propeller long steps right direction attain desired elusive realism Results recent Oshkosh competitions held some surprises factory-built category Beechcraft B-35 Bonanza has winner past two years basic design has use since its intro duction 31 years ago Its K factor 13656 highest scored plane history event two planes score higher 13 clean air plane minimum drag its speed range ratio 37 remarkable figure considers Cessna 140 has ratio slightly over 2 Another clean airplane Bellanca Cruisaire K factor 10758 second place 1976 speed ratio 315 Cessna 172 K 10121 speed ratio 269 placed sec ond 1977 custom-built class competition very keen entries expected Oshkosh emphasis type plane placing high standings Dick VanGruns yens RV-3 Piel Diamant Ryson Cloud ster Piel Emeraude Bushby Mustang II Ken Rands KR-2 Thorp T-18 Any above would great subjects RC Continued page 89 22 Model Aviation Ronald Woody displayed superb Alon Aircoupe Toledo Staf ford kit finished dope Fred Weick designer original Ercoupe ex-modeler incorporated both down- right-thrust Dupont Centari enamel excellent finish over silk covering Starduster Too Don Gruett Stand Off beauty trimmed Hob bypoxy Weight 10 pounds power OS 60F SR engine win ducted fans Webra 40 engines drive McDonnell-Douglas TF-15 Eagle James Gerwitz used new World Engine fan units Fiberglass wheel pants over balsa base Note tiny hexagon head screws mounting Also visible Aeropiccola electric brake its feed wire enclosed hydraulic line moving around After longest few min utes can remember left nerves shot Just five minutes finally reached new record still shaking plane got out sight landed beyond 500 meters would lose record Fifteen hours arrived pre pared land crew urged keep going gently hinting bodily harm Taking short walk helped feel ing better long until tomorrow OK would try fly past midnight another half hour Nearby goals bearable Around 1215 groggy must bring down mixture pushed full lean engine stopped landing made 121917 am 120 meters release point Total duration 15 hours 47 minutes 50 seconds Wow about Time cele brate Congratulations crew did outstanding job particularly after dark plane opened revealing enough fuel four hours Fuel con sumption relatively high power set ting 148 minutes per fluid ounce Photos taken cars packed went home extended period recu peration very long day Maybe next June Ill go New Eng land Ontario Quebec try again daylight Any group up north large runway interest support record attempt encouraged write c/o Model viation REFERENCES 1 William Bertrand Eleven Hours Luck American Aircraft Modeler March 1968 2 Maynard Hill Eleven Half Hours Exciting Boredom Flying Models September 1969 3 Werner Thies Flugkapitan Winfried Kaiser Weltrekordler von Dienst Flug May 1973 4 Maynard Hill RIC Channel Chatter Flying Models December 1972 5 Lars Giertz Flight Operation product review product review product review hA Steerable Nose Gear Small lightweight easy install gear features adiustable steering arm straight 3132 nose gear wire bent builders specifications $225 Du-Bro Products Inc 480 Banner Rd Wauconda IL 60084 product review product review product review L Skyhook VIII Model Airplane News December 1974 6 Richard Weber 652 Miles Per Gallon Model viation November 1975 7 Richard Weber Longest Flight Flying Models September 1976 8 Richard Weber Tortoise Recaptures World Record Russians ModelAviation October 1976 9 Richard Weber Shark Attacks Re cord ModelAviation December 1977 10 Richard Weber Seaplane Record Blitz RCModeler February 1978 11 Jim Oddino Radio Spectrum RC Modeler October 1977 RC Scale/Wischers continued page 22 Scale RV-3 particular because its high K score 13527 its incredible speed ratio 446 single-place plane 125-hp Lycoming power flew through speed trap 204 mph very slow 46 mph Sport Scale RC RV-3 entered 1977 Riverside Nats Glen Carter finishing eighth place far fastest plane tests Bushby Mustang II its 180-hp Lycoming 229 mph Because its weight 200 pounds RV-3 approximately same wing area its slow minimum speed 60 mph kept placing higher fourth 1976 Piel Emeraude well known having won World Scale Championship 1974 Diamant stretched Emeraude No alterations switch mountLi required seats four Ryson Cloudster Pazmany-designed Ryan 100-hp long-distance motor-glider flew California Oshkosh 27 gallons fuel average almost 60 miles per gallon Engine power flight used less half 32 hours flown large wing Ryson would make slow flying model Color Masking Have ever wondered get sharp line between colors finishing pressure sensitive polyester film tape available make job simpler thickness 003 tape leaves almost no edge because smooth no problem color seeping beneath its edge edges sealed pressing place slight change appearance tape indicator tell securely fastened surface Its smoothness also permits taping sooner after previous colors applied risk leaving imprint common wrinkled paper tapes As other tapes sharpest line can pro duced removing before newly applied color completely dry disad vantage polyester tape will bend sharply best used straight lines gentle curves ob tained tape local store specializes supplies auto refinishing available widths desireable model work 1/5 1/a ard October1978 89 A1 7 THE SIMPLEST FASTEST AND EASIEST WAY TO MOUNT YOUR BATTERY SWITCH Designed fit radio switches used today! U L I L complete switch mounting set enables install battery switch minutes anywhere fuselage drilling ONE 3/16 hole! Excellent use planes helicopters boats cars attractive black nylon xswitch mount adaptable wall thickness up 3I8 PRODUCTS INCORPORATED 4d0 onner Road Wauconda Illinois 60084 USA rolls Produced 3M called Scotch Brand Fine Line Masking Tape Wheel Pants part plane vulnerable damage propeller wheel pants close second Coarse grass crop stubble will rip pants mountings unless proper reinforcement applied construction always temptation merely carve pants balsa new appear solid strong few landings rough nose-overs begin show weaknesses scuffs tatters accumulate Carving balsa will produce pants fastest time least effort can used success precau tions taken protect weak spots Quickest method know split block system two equal size blocks used dividing line down center glued together tiny drop white glue end positioned glue spots will carved away external surface can carved sanded shape after razor blade inserted split halves cutting glue spots pants can hollowed using Exacto routers finished drum sand ing Dremel grinder drum sander attachment electric drill have found drill drum use ful tool hollowing balsa parts removes material extreme rapidity using coarse sanding sleeve found hardware stores hollowing must sufficient clear wheel approximately /8 thing less invites trouble deflecting tire rubbing inside resulting ground loops area adjacent landing gear leg will require plywood reinforcement inside making cer tain does interfere tire rotation two halves can now permanently cemented together point pants will extremely light thin depending upon amount material hollowed out used condition would easily damaged reason cover outside surface fiber glass cloth polyester resin balsa merely base shell fiberglass maximum life use heavy boat cloth first layer followed second layer lighter cloth pants have now gained weight also strength toughness resin surface can sanded fine finish ready paint dope fastening prefer brass plate soldered axle 2 3 machine screws threaded #2-56 blind nuts imbedded plywood best scale appearance should hexagon head screws further improve scale ef fect brass plate should inside pants nuts soldered inside sur face place blind nuts exterior surface clean screw heads showing maximum authen ticity bottom edges inside slotted fit over axle assembly full-scale practice single hex screw usually used outside threaded bracket axle end models tap #2-56 #0-80 hex screw end cylindrical spacer its opposite end drilled fit axle screw stead ies outside pant spacer also serves hold wheel centered tire cannot rub interior method pants hold wheels place no wheel collars required system described best right left pant different would case bulge occurs inside streamline wheel brakes right left symmetrical may desirable make plaster paris mold number pants may made laying fiberglass layers inside mold pattern should pine bass made halves described balsa hol 90 Model Aviation 7060 HOLLYWOOD BLVD LOS ANGELES CA 90028 product review product review product review Pilot Figure /4-scale 3 lot figure suit able quarter-scale Jungmeister kit Bud Nosen models extra-large scale models Made hand-laid polyester pilot can modified desired instructions supplied Price $1165 unpainted Available directly Dave Platt Models 6940 NW 15th St Plantation FL 33313 product review product review product review lowed out after splitting patterns given varnish dope finish prevent water absorption mounted flat side down shallow plywood box wood screws patterns given thin coat light grease box poured full plaster paris hydrocal box disassembled patterns removed plaster hardened have found easiest plas ter still warm grease liquid inside surface mold depressions given coat polyvinyl alcohol parting agent polyester resin Several layers fiberglass cloth laid mold resin results half pants subsequently cemented gether after trimming epoxy polyester resin using strip reinforcing cloth inside joint strength Ad vantages gained process include reproducibility very smooth external surface needs almost no sanding similar process can also employed other parts such engine cowls canopies must kept mind pattern should have slight angle vertical surfaces can easily removed plaster mold Because wheel pants made shallow pat terns should cause difficulty deep patterns draft angle necessity Bob Dolly Wischer Rt S-221 Lapham Peak Road Delafield WI 53018 RC Aerobatics/Van Putte continued page 23 Alabama contest June 11 Jim Ray Decatur Alabama flew other airplane became Ace day fifth mid-air collision Jim involved other air plane destroyed able land cloud supposed have silver lining Im hard pressed discover just now since Im madly building new airplane use Nats Im hop ing new Phoenix least good old will definitely mechan ically better since will some new techniques involved sure make sounder airplane tried something new rattling around ought try way sometime file quite After wing skin prepared cover ing complete wing panel both sides bonded lightweight fiberglass cloth outside skin using Southern R/C Products Epoxy Kit cloth smoothed wing skin mixed epoxy thinned slightly isopropyl alcohol brushed through taking care keep out wrinkles entire skin rolled toilet tissue broomstick handle through center tube As tissue became soaked epoxy removed discarded glass cloth bonded per fectly balsa wing skin virtually impossible see foot away wing skin much easier bond core because no ten dency skin crack rolled around wing leading edge can imagine much stronger wing panel especially area around retractable landing gear Although havent painted wing yet should much easier fill resulting very little weight buildup due glass cloth subject good ideas theres some good ideas about pattern contests have around long time originator happy share anyone asks him years ago Leon Shulman developed techniques speed up improve pattern contests surprising calls Shulman System Contest Management fers reprint article same title appeared April 1971 sue Radio Control Modeler magazine anyone sends him self-addressed stamped envelope Write Leon Shul man 173 Essex Avenue Metuchen New Jersey 08840 Heres update use polyur ethane varnish coat wing skins styrofoam cores prior using contact cement received letter Louie Higgins Adelphi Maryland wrote Like Ive applied brush-on type polyurethane varnish just about type foam nary problem However have heard people using spray type having melt foam guess must propellant does damage Could because spray type contact cements warn about covering wing too soon after spraying due damage propellant causes styrofoam Just safe side plan stick October1978 91 REALISM SCALE ACCESSORIES Y WILLIAMS BROTHERS RADIO CONTROL SCALE PILOTS E WHEELS CONTROL-LINECYLINDERS ENGINE KITS MACHINE GUN KITS FREE-FLIGHT STIC DISPLAY MODELS SEND 5O FOR COMPLETE ILLUSTRATED CATALOG DEPT MA 181 PAWNEE STREET SAN MARCOS CA S 92069 product review product review product review ciant Wheels olden Age Wheels disctype employed late 1920s through 1930s Semi-pneumatic tires brass bushed Diameter 6W price $1695 pair Giant Vintage Wheels Typical wheels used during WW through mid-1930s Semi-pneumatic brass bushed Diameter 6-5/8 cost $1695 pair Williams Bros 181 B Street San Marcos CA 92069 product review product review product review
Edition: Model Aviation - 1978/10
Page Numbers: 22, 89, 90, 91
Radio Control Sca1e Bob&DollyWischer SUPER-Efficient Airplanes annual Experimental Aircraft Association Fly-in Convention Oshkosh Wisconsin ideal place gather information seek inspiration new modeling proj ects connection convention contest conducted efficiency basis determine winners Originated Ladislao Pazmany designer PL-l PL-2 PL-4 Ryson Cloudster contest awards K factor com peting plane based its maximum minimum speeds engine power weight wing area using following formula K Vmax 35~W VminPS Vspeed Pengine horsepower Swing area W ht Flights made through 2000-foot speed trap order minimize effect wind flights made dawn planes carefully weighed fuel pilot passengers obvious Pazmany formula plane capable lifting large load has advantage permissible enter twice once pilot alone again loaded up its legal gross weight contest divided two sections factory-built planes other custom-made homebuilt designs Planes place high competition make excellent model subjects None have marginal load lifting capacity Because have wide spread between minimum maximum speeds can made excel flight realism Lately have hearing need scale speeds tain realistic appearance flight prototype capable speeds well excess 200 mph contest judges made aware fact can less fault found model flight speeds model weights kept reasonable level careful construction choice materials slow speeds can result gentle landings place controlled crash arrivals sometimes see Choosing efficient prototype flying low pitch propeller long steps right direction attain desired elusive realism Results recent Oshkosh competitions held some surprises factory-built category Beechcraft B-35 Bonanza has winner past two years basic design has use since its intro duction 31 years ago Its K factor 13656 highest scored plane history event two planes score higher 13 clean air plane minimum drag its speed range ratio 37 remarkable figure considers Cessna 140 has ratio slightly over 2 Another clean airplane Bellanca Cruisaire K factor 10758 second place 1976 speed ratio 315 Cessna 172 K 10121 speed ratio 269 placed sec ond 1977 custom-built class competition very keen entries expected Oshkosh emphasis type plane placing high standings Dick VanGruns yens RV-3 Piel Diamant Ryson Cloud ster Piel Emeraude Bushby Mustang II Ken Rands KR-2 Thorp T-18 Any above would great subjects RC Continued page 89 22 Model Aviation Ronald Woody displayed superb Alon Aircoupe Toledo Staf ford kit finished dope Fred Weick designer original Ercoupe ex-modeler incorporated both down- right-thrust Dupont Centari enamel excellent finish over silk covering Starduster Too Don Gruett Stand Off beauty trimmed Hob bypoxy Weight 10 pounds power OS 60F SR engine win ducted fans Webra 40 engines drive McDonnell-Douglas TF-15 Eagle James Gerwitz used new World Engine fan units Fiberglass wheel pants over balsa base Note tiny hexagon head screws mounting Also visible Aeropiccola electric brake its feed wire enclosed hydraulic line moving around After longest few min utes can remember left nerves shot Just five minutes finally reached new record still shaking plane got out sight landed beyond 500 meters would lose record Fifteen hours arrived pre pared land crew urged keep going gently hinting bodily harm Taking short walk helped feel ing better long until tomorrow OK would try fly past midnight another half hour Nearby goals bearable Around 1215 groggy must bring down mixture pushed full lean engine stopped landing made 121917 am 120 meters release point Total duration 15 hours 47 minutes 50 seconds Wow about Time cele brate Congratulations crew did outstanding job particularly after dark plane opened revealing enough fuel four hours Fuel con sumption relatively high power set ting 148 minutes per fluid ounce Photos taken cars packed went home extended period recu peration very long day Maybe next June Ill go New Eng land Ontario Quebec try again daylight Any group up north large runway interest support record attempt encouraged write c/o Model viation REFERENCES 1 William Bertrand Eleven Hours Luck American Aircraft Modeler March 1968 2 Maynard Hill Eleven Half Hours Exciting Boredom Flying Models September 1969 3 Werner Thies Flugkapitan Winfried Kaiser Weltrekordler von Dienst Flug May 1973 4 Maynard Hill RIC Channel Chatter Flying Models December 1972 5 Lars Giertz Flight Operation product review product review product review hA Steerable Nose Gear Small lightweight easy install gear features adiustable steering arm straight 3132 nose gear wire bent builders specifications $225 Du-Bro Products Inc 480 Banner Rd Wauconda IL 60084 product review product review product review L Skyhook VIII Model Airplane News December 1974 6 Richard Weber 652 Miles Per Gallon Model viation November 1975 7 Richard Weber Longest Flight Flying Models September 1976 8 Richard Weber Tortoise Recaptures World Record Russians ModelAviation October 1976 9 Richard Weber Shark Attacks Re cord ModelAviation December 1977 10 Richard Weber Seaplane Record Blitz RCModeler February 1978 11 Jim Oddino Radio Spectrum RC Modeler October 1977 RC Scale/Wischers continued page 22 Scale RV-3 particular because its high K score 13527 its incredible speed ratio 446 single-place plane 125-hp Lycoming power flew through speed trap 204 mph very slow 46 mph Sport Scale RC RV-3 entered 1977 Riverside Nats Glen Carter finishing eighth place far fastest plane tests Bushby Mustang II its 180-hp Lycoming 229 mph Because its weight 200 pounds RV-3 approximately same wing area its slow minimum speed 60 mph kept placing higher fourth 1976 Piel Emeraude well known having won World Scale Championship 1974 Diamant stretched Emeraude No alterations switch mountLi required seats four Ryson Cloudster Pazmany-designed Ryan 100-hp long-distance motor-glider flew California Oshkosh 27 gallons fuel average almost 60 miles per gallon Engine power flight used less half 32 hours flown large wing Ryson would make slow flying model Color Masking Have ever wondered get sharp line between colors finishing pressure sensitive polyester film tape available make job simpler thickness 003 tape leaves almost no edge because smooth no problem color seeping beneath its edge edges sealed pressing place slight change appearance tape indicator tell securely fastened surface Its smoothness also permits taping sooner after previous colors applied risk leaving imprint common wrinkled paper tapes As other tapes sharpest line can pro duced removing before newly applied color completely dry disad vantage polyester tape will bend sharply best used straight lines gentle curves ob tained tape local store specializes supplies auto refinishing available widths desireable model work 1/5 1/a ard October1978 89 A1 7 THE SIMPLEST FASTEST AND EASIEST WAY TO MOUNT YOUR BATTERY SWITCH Designed fit radio switches used today! U L I L complete switch mounting set enables install battery switch minutes anywhere fuselage drilling ONE 3/16 hole! Excellent use planes helicopters boats cars attractive black nylon xswitch mount adaptable wall thickness up 3I8 PRODUCTS INCORPORATED 4d0 onner Road Wauconda Illinois 60084 USA rolls Produced 3M called Scotch Brand Fine Line Masking Tape Wheel Pants part plane vulnerable damage propeller wheel pants close second Coarse grass crop stubble will rip pants mountings unless proper reinforcement applied construction always temptation merely carve pants balsa new appear solid strong few landings rough nose-overs begin show weaknesses scuffs tatters accumulate Carving balsa will produce pants fastest time least effort can used success precau tions taken protect weak spots Quickest method know split block system two equal size blocks used dividing line down center glued together tiny drop white glue end positioned glue spots will carved away external surface can carved sanded shape after razor blade inserted split halves cutting glue spots pants can hollowed using Exacto routers finished drum sand ing Dremel grinder drum sander attachment electric drill have found drill drum use ful tool hollowing balsa parts removes material extreme rapidity using coarse sanding sleeve found hardware stores hollowing must sufficient clear wheel approximately /8 thing less invites trouble deflecting tire rubbing inside resulting ground loops area adjacent landing gear leg will require plywood reinforcement inside making cer tain does interfere tire rotation two halves can now permanently cemented together point pants will extremely light thin depending upon amount material hollowed out used condition would easily damaged reason cover outside surface fiber glass cloth polyester resin balsa merely base shell fiberglass maximum life use heavy boat cloth first layer followed second layer lighter cloth pants have now gained weight also strength toughness resin surface can sanded fine finish ready paint dope fastening prefer brass plate soldered axle 2 3 machine screws threaded #2-56 blind nuts imbedded plywood best scale appearance should hexagon head screws further improve scale ef fect brass plate should inside pants nuts soldered inside sur face place blind nuts exterior surface clean screw heads showing maximum authen ticity bottom edges inside slotted fit over axle assembly full-scale practice single hex screw usually used outside threaded bracket axle end models tap #2-56 #0-80 hex screw end cylindrical spacer its opposite end drilled fit axle screw stead ies outside pant spacer also serves hold wheel centered tire cannot rub interior method pants hold wheels place no wheel collars required system described best right left pant different would case bulge occurs inside streamline wheel brakes right left symmetrical may desirable make plaster paris mold number pants may made laying fiberglass layers inside mold pattern should pine bass made halves described balsa hol 90 Model Aviation 7060 HOLLYWOOD BLVD LOS ANGELES CA 90028 product review product review product review Pilot Figure /4-scale 3 lot figure suit able quarter-scale Jungmeister kit Bud Nosen models extra-large scale models Made hand-laid polyester pilot can modified desired instructions supplied Price $1165 unpainted Available directly Dave Platt Models 6940 NW 15th St Plantation FL 33313 product review product review product review lowed out after splitting patterns given varnish dope finish prevent water absorption mounted flat side down shallow plywood box wood screws patterns given thin coat light grease box poured full plaster paris hydrocal box disassembled patterns removed plaster hardened have found easiest plas ter still warm grease liquid inside surface mold depressions given coat polyvinyl alcohol parting agent polyester resin Several layers fiberglass cloth laid mold resin results half pants subsequently cemented gether after trimming epoxy polyester resin using strip reinforcing cloth inside joint strength Ad vantages gained process include reproducibility very smooth external surface needs almost no sanding similar process can also employed other parts such engine cowls canopies must kept mind pattern should have slight angle vertical surfaces can easily removed plaster mold Because wheel pants made shallow pat terns should cause difficulty deep patterns draft angle necessity Bob Dolly Wischer Rt S-221 Lapham Peak Road Delafield WI 53018 RC Aerobatics/Van Putte continued page 23 Alabama contest June 11 Jim Ray Decatur Alabama flew other airplane became Ace day fifth mid-air collision Jim involved other air plane destroyed able land cloud supposed have silver lining Im hard pressed discover just now since Im madly building new airplane use Nats Im hop ing new Phoenix least good old will definitely mechan ically better since will some new techniques involved sure make sounder airplane tried something new rattling around ought try way sometime file quite After wing skin prepared cover ing complete wing panel both sides bonded lightweight fiberglass cloth outside skin using Southern R/C Products Epoxy Kit cloth smoothed wing skin mixed epoxy thinned slightly isopropyl alcohol brushed through taking care keep out wrinkles entire skin rolled toilet tissue broomstick handle through center tube As tissue became soaked epoxy removed discarded glass cloth bonded per fectly balsa wing skin virtually impossible see foot away wing skin much easier bond core because no ten dency skin crack rolled around wing leading edge can imagine much stronger wing panel especially area around retractable landing gear Although havent painted wing yet should much easier fill resulting very little weight buildup due glass cloth subject good ideas theres some good ideas about pattern contests have around long time originator happy share anyone asks him years ago Leon Shulman developed techniques speed up improve pattern contests surprising calls Shulman System Contest Management fers reprint article same title appeared April 1971 sue Radio Control Modeler magazine anyone sends him self-addressed stamped envelope Write Leon Shul man 173 Essex Avenue Metuchen New Jersey 08840 Heres update use polyur ethane varnish coat wing skins styrofoam cores prior using contact cement received letter Louie Higgins Adelphi Maryland wrote Like Ive applied brush-on type polyurethane varnish just about type foam nary problem However have heard people using spray type having melt foam guess must propellant does damage Could because spray type contact cements warn about covering wing too soon after spraying due damage propellant causes styrofoam Just safe side plan stick October1978 91 REALISM SCALE ACCESSORIES Y WILLIAMS BROTHERS RADIO CONTROL SCALE PILOTS E WHEELS CONTROL-LINECYLINDERS ENGINE KITS MACHINE GUN KITS FREE-FLIGHT STIC DISPLAY MODELS SEND 5O FOR COMPLETE ILLUSTRATED CATALOG DEPT MA 181 PAWNEE STREET SAN MARCOS CA S 92069 product review product review product review ciant Wheels olden Age Wheels disctype employed late 1920s through 1930s Semi-pneumatic tires brass bushed Diameter 6W price $1695 pair Giant Vintage Wheels Typical wheels used during WW through mid-1930s Semi-pneumatic brass bushed Diameter 6-5/8 cost $1695 pair Williams Bros 181 B Street San Marcos CA 92069 product review product review product review
Edition: Model Aviation - 1978/10
Page Numbers: 22, 89, 90, 91
Radio Control Sca1e Bob&DollyWischer SUPER-Efficient Airplanes annual Experimental Aircraft Association Fly-in Convention Oshkosh Wisconsin ideal place gather information seek inspiration new modeling proj ects connection convention contest conducted efficiency basis determine winners Originated Ladislao Pazmany designer PL-l PL-2 PL-4 Ryson Cloudster contest awards K factor com peting plane based its maximum minimum speeds engine power weight wing area using following formula K Vmax 35~W VminPS Vspeed Pengine horsepower Swing area W ht Flights made through 2000-foot speed trap order minimize effect wind flights made dawn planes carefully weighed fuel pilot passengers obvious Pazmany formula plane capable lifting large load has advantage permissible enter twice once pilot alone again loaded up its legal gross weight contest divided two sections factory-built planes other custom-made homebuilt designs Planes place high competition make excellent model subjects None have marginal load lifting capacity Because have wide spread between minimum maximum speeds can made excel flight realism Lately have hearing need scale speeds tain realistic appearance flight prototype capable speeds well excess 200 mph contest judges made aware fact can less fault found model flight speeds model weights kept reasonable level careful construction choice materials slow speeds can result gentle landings place controlled crash arrivals sometimes see Choosing efficient prototype flying low pitch propeller long steps right direction attain desired elusive realism Results recent Oshkosh competitions held some surprises factory-built category Beechcraft B-35 Bonanza has winner past two years basic design has use since its intro duction 31 years ago Its K factor 13656 highest scored plane history event two planes score higher 13 clean air plane minimum drag its speed range ratio 37 remarkable figure considers Cessna 140 has ratio slightly over 2 Another clean airplane Bellanca Cruisaire K factor 10758 second place 1976 speed ratio 315 Cessna 172 K 10121 speed ratio 269 placed sec ond 1977 custom-built class competition very keen entries expected Oshkosh emphasis type plane placing high standings Dick VanGruns yens RV-3 Piel Diamant Ryson Cloud ster Piel Emeraude Bushby Mustang II Ken Rands KR-2 Thorp T-18 Any above would great subjects RC Continued page 89 22 Model Aviation Ronald Woody displayed superb Alon Aircoupe Toledo Staf ford kit finished dope Fred Weick designer original Ercoupe ex-modeler incorporated both down- right-thrust Dupont Centari enamel excellent finish over silk covering Starduster Too Don Gruett Stand Off beauty trimmed Hob bypoxy Weight 10 pounds power OS 60F SR engine win ducted fans Webra 40 engines drive McDonnell-Douglas TF-15 Eagle James Gerwitz used new World Engine fan units Fiberglass wheel pants over balsa base Note tiny hexagon head screws mounting Also visible Aeropiccola electric brake its feed wire enclosed hydraulic line moving around After longest few min utes can remember left nerves shot Just five minutes finally reached new record still shaking plane got out sight landed beyond 500 meters would lose record Fifteen hours arrived pre pared land crew urged keep going gently hinting bodily harm Taking short walk helped feel ing better long until tomorrow OK would try fly past midnight another half hour Nearby goals bearable Around 1215 groggy must bring down mixture pushed full lean engine stopped landing made 121917 am 120 meters release point Total duration 15 hours 47 minutes 50 seconds Wow about Time cele brate Congratulations crew did outstanding job particularly after dark plane opened revealing enough fuel four hours Fuel con sumption relatively high power set ting 148 minutes per fluid ounce Photos taken cars packed went home extended period recu peration very long day Maybe next June Ill go New Eng land Ontario Quebec try again daylight Any group up north large runway interest support record attempt encouraged write c/o Model viation REFERENCES 1 William Bertrand Eleven Hours Luck American Aircraft Modeler March 1968 2 Maynard Hill Eleven Half Hours Exciting Boredom Flying Models September 1969 3 Werner Thies Flugkapitan Winfried Kaiser Weltrekordler von Dienst Flug May 1973 4 Maynard Hill RIC Channel Chatter Flying Models December 1972 5 Lars Giertz Flight Operation product review product review product review hA Steerable Nose Gear Small lightweight easy install gear features adiustable steering arm straight 3132 nose gear wire bent builders specifications $225 Du-Bro Products Inc 480 Banner Rd Wauconda IL 60084 product review product review product review L Skyhook VIII Model Airplane News December 1974 6 Richard Weber 652 Miles Per Gallon Model viation November 1975 7 Richard Weber Longest Flight Flying Models September 1976 8 Richard Weber Tortoise Recaptures World Record Russians ModelAviation October 1976 9 Richard Weber Shark Attacks Re cord ModelAviation December 1977 10 Richard Weber Seaplane Record Blitz RCModeler February 1978 11 Jim Oddino Radio Spectrum RC Modeler October 1977 RC Scale/Wischers continued page 22 Scale RV-3 particular because its high K score 13527 its incredible speed ratio 446 single-place plane 125-hp Lycoming power flew through speed trap 204 mph very slow 46 mph Sport Scale RC RV-3 entered 1977 Riverside Nats Glen Carter finishing eighth place far fastest plane tests Bushby Mustang II its 180-hp Lycoming 229 mph Because its weight 200 pounds RV-3 approximately same wing area its slow minimum speed 60 mph kept placing higher fourth 1976 Piel Emeraude well known having won World Scale Championship 1974 Diamant stretched Emeraude No alterations switch mountLi required seats four Ryson Cloudster Pazmany-designed Ryan 100-hp long-distance motor-glider flew California Oshkosh 27 gallons fuel average almost 60 miles per gallon Engine power flight used less half 32 hours flown large wing Ryson would make slow flying model Color Masking Have ever wondered get sharp line between colors finishing pressure sensitive polyester film tape available make job simpler thickness 003 tape leaves almost no edge because smooth no problem color seeping beneath its edge edges sealed pressing place slight change appearance tape indicator tell securely fastened surface Its smoothness also permits taping sooner after previous colors applied risk leaving imprint common wrinkled paper tapes As other tapes sharpest line can pro duced removing before newly applied color completely dry disad vantage polyester tape will bend sharply best used straight lines gentle curves ob tained tape local store specializes supplies auto refinishing available widths desireable model work 1/5 1/a ard October1978 89 A1 7 THE SIMPLEST FASTEST AND EASIEST WAY TO MOUNT YOUR BATTERY SWITCH Designed fit radio switches used today! U L I L complete switch mounting set enables install battery switch minutes anywhere fuselage drilling ONE 3/16 hole! Excellent use planes helicopters boats cars attractive black nylon xswitch mount adaptable wall thickness up 3I8 PRODUCTS INCORPORATED 4d0 onner Road Wauconda Illinois 60084 USA rolls Produced 3M called Scotch Brand Fine Line Masking Tape Wheel Pants part plane vulnerable damage propeller wheel pants close second Coarse grass crop stubble will rip pants mountings unless proper reinforcement applied construction always temptation merely carve pants balsa new appear solid strong few landings rough nose-overs begin show weaknesses scuffs tatters accumulate Carving balsa will produce pants fastest time least effort can used success precau tions taken protect weak spots Quickest method know split block system two equal size blocks used dividing line down center glued together tiny drop white glue end positioned glue spots will carved away external surface can carved sanded shape after razor blade inserted split halves cutting glue spots pants can hollowed using Exacto routers finished drum sand ing Dremel grinder drum sander attachment electric drill have found drill drum use ful tool hollowing balsa parts removes material extreme rapidity using coarse sanding sleeve found hardware stores hollowing must sufficient clear wheel approximately /8 thing less invites trouble deflecting tire rubbing inside resulting ground loops area adjacent landing gear leg will require plywood reinforcement inside making cer tain does interfere tire rotation two halves can now permanently cemented together point pants will extremely light thin depending upon amount material hollowed out used condition would easily damaged reason cover outside surface fiber glass cloth polyester resin balsa merely base shell fiberglass maximum life use heavy boat cloth first layer followed second layer lighter cloth pants have now gained weight also strength toughness resin surface can sanded fine finish ready paint dope fastening prefer brass plate soldered axle 2 3 machine screws threaded #2-56 blind nuts imbedded plywood best scale appearance should hexagon head screws further improve scale ef fect brass plate should inside pants nuts soldered inside sur face place blind nuts exterior surface clean screw heads showing maximum authen ticity bottom edges inside slotted fit over axle assembly full-scale practice single hex screw usually used outside threaded bracket axle end models tap #2-56 #0-80 hex screw end cylindrical spacer its opposite end drilled fit axle screw stead ies outside pant spacer also serves hold wheel centered tire cannot rub interior method pants hold wheels place no wheel collars required system described best right left pant different would case bulge occurs inside streamline wheel brakes right left symmetrical may desirable make plaster paris mold number pants may made laying fiberglass layers inside mold pattern should pine bass made halves described balsa hol 90 Model Aviation 7060 HOLLYWOOD BLVD LOS ANGELES CA 90028 product review product review product review Pilot Figure /4-scale 3 lot figure suit able quarter-scale Jungmeister kit Bud Nosen models extra-large scale models Made hand-laid polyester pilot can modified desired instructions supplied Price $1165 unpainted Available directly Dave Platt Models 6940 NW 15th St Plantation FL 33313 product review product review product review lowed out after splitting patterns given varnish dope finish prevent water absorption mounted flat side down shallow plywood box wood screws patterns given thin coat light grease box poured full plaster paris hydrocal box disassembled patterns removed plaster hardened have found easiest plas ter still warm grease liquid inside surface mold depressions given coat polyvinyl alcohol parting agent polyester resin Several layers fiberglass cloth laid mold resin results half pants subsequently cemented gether after trimming epoxy polyester resin using strip reinforcing cloth inside joint strength Ad vantages gained process include reproducibility very smooth external surface needs almost no sanding similar process can also employed other parts such engine cowls canopies must kept mind pattern should have slight angle vertical surfaces can easily removed plaster mold Because wheel pants made shallow pat terns should cause difficulty deep patterns draft angle necessity Bob Dolly Wischer Rt S-221 Lapham Peak Road Delafield WI 53018 RC Aerobatics/Van Putte continued page 23 Alabama contest June 11 Jim Ray Decatur Alabama flew other airplane became Ace day fifth mid-air collision Jim involved other air plane destroyed able land cloud supposed have silver lining Im hard pressed discover just now since Im madly building new airplane use Nats Im hop ing new Phoenix least good old will definitely mechan ically better since will some new techniques involved sure make sounder airplane tried something new rattling around ought try way sometime file quite After wing skin prepared cover ing complete wing panel both sides bonded lightweight fiberglass cloth outside skin using Southern R/C Products Epoxy Kit cloth smoothed wing skin mixed epoxy thinned slightly isopropyl alcohol brushed through taking care keep out wrinkles entire skin rolled toilet tissue broomstick handle through center tube As tissue became soaked epoxy removed discarded glass cloth bonded per fectly balsa wing skin virtually impossible see foot away wing skin much easier bond core because no ten dency skin crack rolled around wing leading edge can imagine much stronger wing panel especially area around retractable landing gear Although havent painted wing yet should much easier fill resulting very little weight buildup due glass cloth subject good ideas theres some good ideas about pattern contests have around long time originator happy share anyone asks him years ago Leon Shulman developed techniques speed up improve pattern contests surprising calls Shulman System Contest Management fers reprint article same title appeared April 1971 sue Radio Control Modeler magazine anyone sends him self-addressed stamped envelope Write Leon Shul man 173 Essex Avenue Metuchen New Jersey 08840 Heres update use polyur ethane varnish coat wing skins styrofoam cores prior using contact cement received letter Louie Higgins Adelphi Maryland wrote Like Ive applied brush-on type polyurethane varnish just about type foam nary problem However have heard people using spray type having melt foam guess must propellant does damage Could because spray type contact cements warn about covering wing too soon after spraying due damage propellant causes styrofoam Just safe side plan stick October1978 91 REALISM SCALE ACCESSORIES Y WILLIAMS BROTHERS RADIO CONTROL SCALE PILOTS E WHEELS CONTROL-LINECYLINDERS ENGINE KITS MACHINE GUN KITS FREE-FLIGHT STIC DISPLAY MODELS SEND 5O FOR COMPLETE ILLUSTRATED CATALOG DEPT MA 181 PAWNEE STREET SAN MARCOS CA S 92069 product review product review product review ciant Wheels olden Age Wheels disctype employed late 1920s through 1930s Semi-pneumatic tires brass bushed Diameter 6W price $1695 pair Giant Vintage Wheels Typical wheels used during WW through mid-1930s Semi-pneumatic brass bushed Diameter 6-5/8 cost $1695 pair Williams Bros 181 B Street San Marcos CA 92069 product review product review product review
Edition: Model Aviation - 1978/10
Page Numbers: 22, 89, 90, 91
Radio Control Sca1e Bob&DollyWischer SUPER-Efficient Airplanes annual Experimental Aircraft Association Fly-in Convention Oshkosh Wisconsin ideal place gather information seek inspiration new modeling proj ects connection convention contest conducted efficiency basis determine winners Originated Ladislao Pazmany designer PL-l PL-2 PL-4 Ryson Cloudster contest awards K factor com peting plane based its maximum minimum speeds engine power weight wing area using following formula K Vmax 35~W VminPS Vspeed Pengine horsepower Swing area W ht Flights made through 2000-foot speed trap order minimize effect wind flights made dawn planes carefully weighed fuel pilot passengers obvious Pazmany formula plane capable lifting large load has advantage permissible enter twice once pilot alone again loaded up its legal gross weight contest divided two sections factory-built planes other custom-made homebuilt designs Planes place high competition make excellent model subjects None have marginal load lifting capacity Because have wide spread between minimum maximum speeds can made excel flight realism Lately have hearing need scale speeds tain realistic appearance flight prototype capable speeds well excess 200 mph contest judges made aware fact can less fault found model flight speeds model weights kept reasonable level careful construction choice materials slow speeds can result gentle landings place controlled crash arrivals sometimes see Choosing efficient prototype flying low pitch propeller long steps right direction attain desired elusive realism Results recent Oshkosh competitions held some surprises factory-built category Beechcraft B-35 Bonanza has winner past two years basic design has use since its intro duction 31 years ago Its K factor 13656 highest scored plane history event two planes score higher 13 clean air plane minimum drag its speed range ratio 37 remarkable figure considers Cessna 140 has ratio slightly over 2 Another clean airplane Bellanca Cruisaire K factor 10758 second place 1976 speed ratio 315 Cessna 172 K 10121 speed ratio 269 placed sec ond 1977 custom-built class competition very keen entries expected Oshkosh emphasis type plane placing high standings Dick VanGruns yens RV-3 Piel Diamant Ryson Cloud ster Piel Emeraude Bushby Mustang II Ken Rands KR-2 Thorp T-18 Any above would great subjects RC Continued page 89 22 Model Aviation Ronald Woody displayed superb Alon Aircoupe Toledo Staf ford kit finished dope Fred Weick designer original Ercoupe ex-modeler incorporated both down- right-thrust Dupont Centari enamel excellent finish over silk covering Starduster Too Don Gruett Stand Off beauty trimmed Hob bypoxy Weight 10 pounds power OS 60F SR engine win ducted fans Webra 40 engines drive McDonnell-Douglas TF-15 Eagle James Gerwitz used new World Engine fan units Fiberglass wheel pants over balsa base Note tiny hexagon head screws mounting Also visible Aeropiccola electric brake its feed wire enclosed hydraulic line moving around After longest few min utes can remember left nerves shot Just five minutes finally reached new record still shaking plane got out sight landed beyond 500 meters would lose record Fifteen hours arrived pre pared land crew urged keep going gently hinting bodily harm Taking short walk helped feel ing better long until tomorrow OK would try fly past midnight another half hour Nearby goals bearable Around 1215 groggy must bring down mixture pushed full lean engine stopped landing made 121917 am 120 meters release point Total duration 15 hours 47 minutes 50 seconds Wow about Time cele brate Congratulations crew did outstanding job particularly after dark plane opened revealing enough fuel four hours Fuel con sumption relatively high power set ting 148 minutes per fluid ounce Photos taken cars packed went home extended period recu peration very long day Maybe next June Ill go New Eng land Ontario Quebec try again daylight Any group up north large runway interest support record attempt encouraged write c/o Model viation REFERENCES 1 William Bertrand Eleven Hours Luck American Aircraft Modeler March 1968 2 Maynard Hill Eleven Half Hours Exciting Boredom Flying Models September 1969 3 Werner Thies Flugkapitan Winfried Kaiser Weltrekordler von Dienst Flug May 1973 4 Maynard Hill RIC Channel Chatter Flying Models December 1972 5 Lars Giertz Flight Operation product review product review product review hA Steerable Nose Gear Small lightweight easy install gear features adiustable steering arm straight 3132 nose gear wire bent builders specifications $225 Du-Bro Products Inc 480 Banner Rd Wauconda IL 60084 product review product review product review L Skyhook VIII Model Airplane News December 1974 6 Richard Weber 652 Miles Per Gallon Model viation November 1975 7 Richard Weber Longest Flight Flying Models September 1976 8 Richard Weber Tortoise Recaptures World Record Russians ModelAviation October 1976 9 Richard Weber Shark Attacks Re cord ModelAviation December 1977 10 Richard Weber Seaplane Record Blitz RCModeler February 1978 11 Jim Oddino Radio Spectrum RC Modeler October 1977 RC Scale/Wischers continued page 22 Scale RV-3 particular because its high K score 13527 its incredible speed ratio 446 single-place plane 125-hp Lycoming power flew through speed trap 204 mph very slow 46 mph Sport Scale RC RV-3 entered 1977 Riverside Nats Glen Carter finishing eighth place far fastest plane tests Bushby Mustang II its 180-hp Lycoming 229 mph Because its weight 200 pounds RV-3 approximately same wing area its slow minimum speed 60 mph kept placing higher fourth 1976 Piel Emeraude well known having won World Scale Championship 1974 Diamant stretched Emeraude No alterations switch mountLi required seats four Ryson Cloudster Pazmany-designed Ryan 100-hp long-distance motor-glider flew California Oshkosh 27 gallons fuel average almost 60 miles per gallon Engine power flight used less half 32 hours flown large wing Ryson would make slow flying model Color Masking Have ever wondered get sharp line between colors finishing pressure sensitive polyester film tape available make job simpler thickness 003 tape leaves almost no edge because smooth no problem color seeping beneath its edge edges sealed pressing place slight change appearance tape indicator tell securely fastened surface Its smoothness also permits taping sooner after previous colors applied risk leaving imprint common wrinkled paper tapes As other tapes sharpest line can pro duced removing before newly applied color completely dry disad vantage polyester tape will bend sharply best used straight lines gentle curves ob tained tape local store specializes supplies auto refinishing available widths desireable model work 1/5 1/a ard October1978 89 A1 7 THE SIMPLEST FASTEST AND EASIEST WAY TO MOUNT YOUR BATTERY SWITCH Designed fit radio switches used today! U L I L complete switch mounting set enables install battery switch minutes anywhere fuselage drilling ONE 3/16 hole! Excellent use planes helicopters boats cars attractive black nylon xswitch mount adaptable wall thickness up 3I8 PRODUCTS INCORPORATED 4d0 onner Road Wauconda Illinois 60084 USA rolls Produced 3M called Scotch Brand Fine Line Masking Tape Wheel Pants part plane vulnerable damage propeller wheel pants close second Coarse grass crop stubble will rip pants mountings unless proper reinforcement applied construction always temptation merely carve pants balsa new appear solid strong few landings rough nose-overs begin show weaknesses scuffs tatters accumulate Carving balsa will produce pants fastest time least effort can used success precau tions taken protect weak spots Quickest method know split block system two equal size blocks used dividing line down center glued together tiny drop white glue end positioned glue spots will carved away external surface can carved sanded shape after razor blade inserted split halves cutting glue spots pants can hollowed using Exacto routers finished drum sand ing Dremel grinder drum sander attachment electric drill have found drill drum use ful tool hollowing balsa parts removes material extreme rapidity using coarse sanding sleeve found hardware stores hollowing must sufficient clear wheel approximately /8 thing less invites trouble deflecting tire rubbing inside resulting ground loops area adjacent landing gear leg will require plywood reinforcement inside making cer tain does interfere tire rotation two halves can now permanently cemented together point pants will extremely light thin depending upon amount material hollowed out used condition would easily damaged reason cover outside surface fiber glass cloth polyester resin balsa merely base shell fiberglass maximum life use heavy boat cloth first layer followed second layer lighter cloth pants have now gained weight also strength toughness resin surface can sanded fine finish ready paint dope fastening prefer brass plate soldered axle 2 3 machine screws threaded #2-56 blind nuts imbedded plywood best scale appearance should hexagon head screws further improve scale ef fect brass plate should inside pants nuts soldered inside sur face place blind nuts exterior surface clean screw heads showing maximum authen ticity bottom edges inside slotted fit over axle assembly full-scale practice single hex screw usually used outside threaded bracket axle end models tap #2-56 #0-80 hex screw end cylindrical spacer its opposite end drilled fit axle screw stead ies outside pant spacer also serves hold wheel centered tire cannot rub interior method pants hold wheels place no wheel collars required system described best right left pant different would case bulge occurs inside streamline wheel brakes right left symmetrical may desirable make plaster paris mold number pants may made laying fiberglass layers inside mold pattern should pine bass made halves described balsa hol 90 Model Aviation 7060 HOLLYWOOD BLVD LOS ANGELES CA 90028 product review product review product review Pilot Figure /4-scale 3 lot figure suit able quarter-scale Jungmeister kit Bud Nosen models extra-large scale models Made hand-laid polyester pilot can modified desired instructions supplied Price $1165 unpainted Available directly Dave Platt Models 6940 NW 15th St Plantation FL 33313 product review product review product review lowed out after splitting patterns given varnish dope finish prevent water absorption mounted flat side down shallow plywood box wood screws patterns given thin coat light grease box poured full plaster paris hydrocal box disassembled patterns removed plaster hardened have found easiest plas ter still warm grease liquid inside surface mold depressions given coat polyvinyl alcohol parting agent polyester resin Several layers fiberglass cloth laid mold resin results half pants subsequently cemented gether after trimming epoxy polyester resin using strip reinforcing cloth inside joint strength Ad vantages gained process include reproducibility very smooth external surface needs almost no sanding similar process can also employed other parts such engine cowls canopies must kept mind pattern should have slight angle vertical surfaces can easily removed plaster mold Because wheel pants made shallow pat terns should cause difficulty deep patterns draft angle necessity Bob Dolly Wischer Rt S-221 Lapham Peak Road Delafield WI 53018 RC Aerobatics/Van Putte continued page 23 Alabama contest June 11 Jim Ray Decatur Alabama flew other airplane became Ace day fifth mid-air collision Jim involved other air plane destroyed able land cloud supposed have silver lining Im hard pressed discover just now since Im madly building new airplane use Nats Im hop ing new Phoenix least good old will definitely mechan ically better since will some new techniques involved sure make sounder airplane tried something new rattling around ought try way sometime file quite After wing skin prepared cover ing complete wing panel both sides bonded lightweight fiberglass cloth outside skin using Southern R/C Products Epoxy Kit cloth smoothed wing skin mixed epoxy thinned slightly isopropyl alcohol brushed through taking care keep out wrinkles entire skin rolled toilet tissue broomstick handle through center tube As tissue became soaked epoxy removed discarded glass cloth bonded per fectly balsa wing skin virtually impossible see foot away wing skin much easier bond core because no ten dency skin crack rolled around wing leading edge can imagine much stronger wing panel especially area around retractable landing gear Although havent painted wing yet should much easier fill resulting very little weight buildup due glass cloth subject good ideas theres some good ideas about pattern contests have around long time originator happy share anyone asks him years ago Leon Shulman developed techniques speed up improve pattern contests surprising calls Shulman System Contest Management fers reprint article same title appeared April 1971 sue Radio Control Modeler magazine anyone sends him self-addressed stamped envelope Write Leon Shul man 173 Essex Avenue Metuchen New Jersey 08840 Heres update use polyur ethane varnish coat wing skins styrofoam cores prior using contact cement received letter Louie Higgins Adelphi Maryland wrote Like Ive applied brush-on type polyurethane varnish just about type foam nary problem However have heard people using spray type having melt foam guess must propellant does damage Could because spray type contact cements warn about covering wing too soon after spraying due damage propellant causes styrofoam Just safe side plan stick October1978 91 REALISM SCALE ACCESSORIES Y WILLIAMS BROTHERS RADIO CONTROL SCALE PILOTS E WHEELS CONTROL-LINECYLINDERS ENGINE KITS MACHINE GUN KITS FREE-FLIGHT STIC DISPLAY MODELS SEND 5O FOR COMPLETE ILLUSTRATED CATALOG DEPT MA 181 PAWNEE STREET SAN MARCOS CA S 92069 product review product review product review ciant Wheels olden Age Wheels disctype employed late 1920s through 1930s Semi-pneumatic tires brass bushed Diameter 6W price $1695 pair Giant Vintage Wheels Typical wheels used during WW through mid-1930s Semi-pneumatic brass bushed Diameter 6-5/8 cost $1695 pair Williams Bros 181 B Street San Marcos CA 92069 product review product review product review