Free Flight OLD- TIMER Clarence Haught SPREAD THE WORD hear time Man Id like have some radiocontrolled models answer Well fly Free Flight reply mean hang gliding Isnt kind dangerous National Free Flight Society believes kids younger adults would interested Free Flight knew existed So NFFS President Tony Italiano has delegated responsibility publicity program Jack Woodard 7985 Sunridge Court Fair Oaks CA 95628 916 961-1829 big job Jack needs help will contact AMA Free Flight clubs problem finding folks out dont have luxury good club help promote Free Flight Jack needs contact people major area state having Free Flight activity Old-Timer movement just small part whole picture have special appeal cabin ships have realism special beauty own also fortunate have events already existence tailor-made beginners 020 Replica event comes mind instantly about special-event half-scale OT 049 glow en gines about full-scale models would fly beautifully inexpensive Baby Bee 049 engines Lets get together behind Jack NFFSand promote Free Flight Take spec tator along next time go out fly Get kid hooked model airplanes Truth advertising Flies 36 mm 15-sec motor run Similar statements introduced advertisements early issues modeling press Thermals unheard average modeler lucky thermal flights credited designer Ive often pondered finishes lack thereof applied old ships considers life expectancy brought about flyaways crashes comes clearer Today models enjoy long service due primarily wide-spread popularity dethermalizer systems Most us familiar pop-up-tail dethermalizer first used Carl Goldberg February 22 1942 system now enjoys worldwide acceptance incorporated basic model design Old-Timer designs can altered ac commodate pop-up-tail system quite easily However others require considerable ingenuity due design complexity fuselage-totail-surface area model Some designs just dont lend themselves Other systems have enjoyed limited popularity Spoilers top surface wing very effective have developed high degree modern RC Glider enthusiasts would rate method high second Carls system Probably third-ranking system would drag chute system whereby small para chute packed suitable compartment anchored tail post deployed proper moment appropriate timer creases drag point model cannot sustain flight Chute size can critical factor Continued page 126 om urine niereajing uciauls James Oggs Powerhouse Photo L shows long-duration timer perched next engine timer booster battery jack between Location timers sim plifies ROG launches Long duration timer Otto Bernhardt 77 Products Tail end R reveals some nice features screw adjustment stab incidence trim good solid alignment keys stab necessity pop-up tail DT rudder mounted stab Jim Redwood City CA Entire tail assembly shifted directional trim Larry Schwarzs problem put pop-up-tail DT Taibi Pacer stab mounts through center aft fuselage Solution 3-piece stab Outer panels rotating LE-down DT Wire TE aligns outer panels pivot wood dowel Hes Las Vegas May 198257 Long duration timer attop fabricated Bob Schaferfrom ordi nary kitchen timer Remove excess weight install mounting plate disk trip notch Release arm mounts timer plate model Allows DT release time up hour after launch problem latest consensus among US fliers also shared some fliers other countries no change should made FiD rules present new class could established explore depth some concepts developed during present discus sion end Erv has brought forth following proposal hammered out aid Dan Domina John Triolo 50cm Intermediate Indoor Duration Model 1 Projected wingspan 50cm 1969 maxi mum 2 Length excluding propeller 50cm maximum 3 Model weight least gram motor 4 Wing area 650 sq cm 10078 sq maximum 5 Stab span 30cm 1181 maximum 6 Stab area 325 sq cm 5039 sq maximum 7 Motor stick length front thrust bearing rear hook 25 cm 984 maximum 8 surfaces covered side 9 Propellers will have two blades no in-flight mechanically-adjusted parts 10 Multiwing area will cumulative 650 sq cm total 11 Models must conform concept simplicity opinion Contest Director modeler has incorporated gross new technology model will declared illegal model scale Scale model Micro-Air distinctive sound intheair. Technopowers 7 cylinder 4 cycle Radial Engine Send $200 catalog products TECHNOPOWER H INC 16650 South 104th AVENUt ORLAND PARK ILLINOIS 60462 Precision Products Box 1129 Richland WA 99352 has produced interesting plan set will enable average flier produce scale weigh Indoor models very nice kit pressure-sensitive labels form necessary beam markings Similar labels furnished can used tem plates cut out several metal parts increase scales durability No actual materi als except labels included kit bill materials included range weights handled scale run 001 oz smallest major graduation beam up 16 oz upper limit scale capacity anyone needs scale has time build plan good buy $3 info picture Bob Meusers column Prop fixtures number occasions column has dealt topic propeller design construction Most Indoor props built blocks carved form required helical twist method new block required propeller has different pitch photo shows method first developed Pete Andrews think since rib station Indoor prop must different angle fixture allows rib station angle individually set according some scheme prop design look closely photo outline FAI prop has fastened fixture prop spar visible beginning just right left-hand support central rod rod number protractors have assembled 1-in intervals protractor has bearing visible locking mechanism holds protractor angle measured line runs along horizontal bar back fixture propeller helical pitch distribution desired blade angle station can calculated Prop pitch basics propeller moves forward 12 in revolution said have effec tive pitch 1 2 definition assums propeller does slip make up building higher pitch basic design formula prop pitch Pitch 6 x tangent blade angle x diameter blade element required blade angle can derived realizing blade element will travel helix defined distance forward prop moves revolution circle same radius radius prop element prop shaft shown drawing graphically derives required blade angle single blade element topic will covered greater detail next time stay tuned Bud Tenny Box 545 Richardson TX 75080 FF Old-Timers/Haught Continued page 57 Too small model will brought down timely manner too big resulting straight-down parachute operation serious damage Ive seen models fly away thermal parachute dethermalizers duti fully following along behind Edito Ditto pop-up stabilizers probably stronger thermals As alternative pop-up-tail can pop up leading edge wing Ive never seen system use suspect some real potential rigglng problems solved anyone out has tried system would like share readers Finally theres spool system volves attaching suitable length line wing tip weight attached other end usually sewing thread spool spool canled near models CG released timer upsetting models lateral direc tional stability inducing steep spiraldive continues until spool contacts ground allowing line slacken thereby permit ting model recover land Gad Finding suitable length line could require iron nerves perhaps computer anyone out has used system let us expenence systems rely some sort timing device actuation Slow-burning fuse common followed mechanical clock work timers Some individuals distrusting mechanical timers use backup fuse well timer Sort like wearing suspenders belt hold up ones pants Timers malfunction occasion fuses go out tooor appear lit theyre actually scorched Some Old-Timers used air pneumatic timers depended needle valve adjustment event reasonable accuracy essential Ive short-fused myself occasion watched model DT prior sure max Other times Ive chased model two three minutes beyond max flight windy rugged conditions 1 26 Model Aviation RIC PILOT LOGBOOK@ AND FLIGHT RECORD *AIRCRAFT FLOWN *FLyING FIELDS *FLIGHT INSTRUCTOR *TOTAL HOURS *WEATHER CONDITIONS * FLIGHT DURATION *TRIM ADJUSTMENTS above can entered own personal flight log tirst time R/C LOGBOOK designed specifically pilot minitiature aircraft Whatever particular skill level may LOGBOOK will add enjoyment A/C flying LOGBOOK has durable hard-bound cover contains sufficient pages record years flying bythe average R/G pilotSil 981 Champion Hobbies$695 Postage Paid Dealer/Distributor inquiries welcomeOhio ,sidento odd 32C ooies tool CHAMPION HOBBIES 3716 Reemelin Cincinnati OH 45211 513 481-6961 What break through TIJNEIJIAEFI1F totally unique flying sensation A very complete precision kit can easily assembled ready operation 8 12 hours required minimum standard 3 channel radio good 60 90 engine complete details contact Dealer Inquiries Invited FIJTIMLITIE 214 Dolomite Drive Downsview Ontario M3J 2P8Tel 416-661 -5562 TEE BAR ALUMINUM EXTRUSION SANDING BLOCK hr mae urn RUFF-STUFF SeN-adhesIve ued payer Large True Sedaca WeetWearOut 116CR $225 Handyta Use 22 Inch $335 RUFF F SELF ADHESIVE SHEET SANOVAVER AXE YOUR OWN SPECIAL SANDING SHAVES Easy Use ijeetum FIne r FIne $ assy gIn dryIng ne MINILsAW $610 COMPACT 10 Inch HACK SAW SAWS ANYTHING ANYWHERE Saw has rugged dIn-cast frame wIth cushitubh chip-past plastic ml trandh RecedIng em ad istabte B bled gIves ess Cuts weed plastIc metal HARDENED MUSIC winE Xtr bledes-3/$1 75 best solution can offer regard make practice test-bum some fuse two three times during contest day Youll surprised burning rate will vary existing con ditions Moisture humidity wind velocity etc have measurable effects Some all-out Duration events Texaco Fuel Allotment Antique etc utilize detherm alizers have noticed however more long-time dethermalizer timers installed models used events boils down willing flier sacrifice model trophy Sometimes flying site size factor competitors want ensure staying field circling model can still get long ways down wind given good air DT timers high-time events com monly available solution make own using works travel alarm clock better yeta kitchen timer Its fairly simple matter add disk trip arm devices resulting inexpensive yet depend able unit course unnecessary weight should removed lightweight dust cover should fitted Bring em back alive Clarence Haught Rt 5 Box 16 Coeur dAlene ID 83814 Truant MCD ermoth Continued page 60 model stalls again add another thickness 1/32 plywood model dives quickly ground no stall put 1/32 x 1 x plywood pieces time between leading edge wing mounts until glide levels off test glides go straight right cut rudder tab shown plan glue itso deflected about 1 / 16 left viewed Buckeye Balsa supplies AAA quality balsa certified aircraft plywood fine Kits Aero Composites Kitty Hawk Models Mr Gs Dave Platt R/C Kits Mfg. VK Models & hobby shops SAMPLE PRICESYour Listcost Balsa 1/16x4x36149112 Balsa 114x4x36266200 Plywood 3/32x1 2x481171878 Plywood 1/8x12x481243932 Spruce 3/1 6x3/1 6x484735 9.I Shipping & handling added orders shipped C 00 U P S Cash Only N 5959 LEFFINGWELL ROAD PHONE 2165333607 IELD OHIO 44406 May 1982 127 first its kind radio controlled ring wing aircraft having flight performance helicopter complexities MINI-STRIPSPRECISION DIE-CUT Medha Garnet SAVES TIME LACEMENTFine Garnet AND EFFORT SANDING BELTSAssid Mater Prool Send $1 catalog Price applied first order Add 20% postage Send 25C catalog
Edition: Model Aviation - 1982/05
Page Numbers: 57, 126, 127
Free Flight OLD- TIMER Clarence Haught SPREAD THE WORD hear time Man Id like have some radiocontrolled models answer Well fly Free Flight reply mean hang gliding Isnt kind dangerous National Free Flight Society believes kids younger adults would interested Free Flight knew existed So NFFS President Tony Italiano has delegated responsibility publicity program Jack Woodard 7985 Sunridge Court Fair Oaks CA 95628 916 961-1829 big job Jack needs help will contact AMA Free Flight clubs problem finding folks out dont have luxury good club help promote Free Flight Jack needs contact people major area state having Free Flight activity Old-Timer movement just small part whole picture have special appeal cabin ships have realism special beauty own also fortunate have events already existence tailor-made beginners 020 Replica event comes mind instantly about special-event half-scale OT 049 glow en gines about full-scale models would fly beautifully inexpensive Baby Bee 049 engines Lets get together behind Jack NFFSand promote Free Flight Take spec tator along next time go out fly Get kid hooked model airplanes Truth advertising Flies 36 mm 15-sec motor run Similar statements introduced advertisements early issues modeling press Thermals unheard average modeler lucky thermal flights credited designer Ive often pondered finishes lack thereof applied old ships considers life expectancy brought about flyaways crashes comes clearer Today models enjoy long service due primarily wide-spread popularity dethermalizer systems Most us familiar pop-up-tail dethermalizer first used Carl Goldberg February 22 1942 system now enjoys worldwide acceptance incorporated basic model design Old-Timer designs can altered ac commodate pop-up-tail system quite easily However others require considerable ingenuity due design complexity fuselage-totail-surface area model Some designs just dont lend themselves Other systems have enjoyed limited popularity Spoilers top surface wing very effective have developed high degree modern RC Glider enthusiasts would rate method high second Carls system Probably third-ranking system would drag chute system whereby small para chute packed suitable compartment anchored tail post deployed proper moment appropriate timer creases drag point model cannot sustain flight Chute size can critical factor Continued page 126 om urine niereajing uciauls James Oggs Powerhouse Photo L shows long-duration timer perched next engine timer booster battery jack between Location timers sim plifies ROG launches Long duration timer Otto Bernhardt 77 Products Tail end R reveals some nice features screw adjustment stab incidence trim good solid alignment keys stab necessity pop-up tail DT rudder mounted stab Jim Redwood City CA Entire tail assembly shifted directional trim Larry Schwarzs problem put pop-up-tail DT Taibi Pacer stab mounts through center aft fuselage Solution 3-piece stab Outer panels rotating LE-down DT Wire TE aligns outer panels pivot wood dowel Hes Las Vegas May 198257 Long duration timer attop fabricated Bob Schaferfrom ordi nary kitchen timer Remove excess weight install mounting plate disk trip notch Release arm mounts timer plate model Allows DT release time up hour after launch problem latest consensus among US fliers also shared some fliers other countries no change should made FiD rules present new class could established explore depth some concepts developed during present discus sion end Erv has brought forth following proposal hammered out aid Dan Domina John Triolo 50cm Intermediate Indoor Duration Model 1 Projected wingspan 50cm 1969 maxi mum 2 Length excluding propeller 50cm maximum 3 Model weight least gram motor 4 Wing area 650 sq cm 10078 sq maximum 5 Stab span 30cm 1181 maximum 6 Stab area 325 sq cm 5039 sq maximum 7 Motor stick length front thrust bearing rear hook 25 cm 984 maximum 8 surfaces covered side 9 Propellers will have two blades no in-flight mechanically-adjusted parts 10 Multiwing area will cumulative 650 sq cm total 11 Models must conform concept simplicity opinion Contest Director modeler has incorporated gross new technology model will declared illegal model scale Scale model Micro-Air distinctive sound intheair. Technopowers 7 cylinder 4 cycle Radial Engine Send $200 catalog products TECHNOPOWER H INC 16650 South 104th AVENUt ORLAND PARK ILLINOIS 60462 Precision Products Box 1129 Richland WA 99352 has produced interesting plan set will enable average flier produce scale weigh Indoor models very nice kit pressure-sensitive labels form necessary beam markings Similar labels furnished can used tem plates cut out several metal parts increase scales durability No actual materi als except labels included kit bill materials included range weights handled scale run 001 oz smallest major graduation beam up 16 oz upper limit scale capacity anyone needs scale has time build plan good buy $3 info picture Bob Meusers column Prop fixtures number occasions column has dealt topic propeller design construction Most Indoor props built blocks carved form required helical twist method new block required propeller has different pitch photo shows method first developed Pete Andrews think since rib station Indoor prop must different angle fixture allows rib station angle individually set according some scheme prop design look closely photo outline FAI prop has fastened fixture prop spar visible beginning just right left-hand support central rod rod number protractors have assembled 1-in intervals protractor has bearing visible locking mechanism holds protractor angle measured line runs along horizontal bar back fixture propeller helical pitch distribution desired blade angle station can calculated Prop pitch basics propeller moves forward 12 in revolution said have effec tive pitch 1 2 definition assums propeller does slip make up building higher pitch basic design formula prop pitch Pitch 6 x tangent blade angle x diameter blade element required blade angle can derived realizing blade element will travel helix defined distance forward prop moves revolution circle same radius radius prop element prop shaft shown drawing graphically derives required blade angle single blade element topic will covered greater detail next time stay tuned Bud Tenny Box 545 Richardson TX 75080 FF Old-Timers/Haught Continued page 57 Too small model will brought down timely manner too big resulting straight-down parachute operation serious damage Ive seen models fly away thermal parachute dethermalizers duti fully following along behind Edito Ditto pop-up stabilizers probably stronger thermals As alternative pop-up-tail can pop up leading edge wing Ive never seen system use suspect some real potential rigglng problems solved anyone out has tried system would like share readers Finally theres spool system volves attaching suitable length line wing tip weight attached other end usually sewing thread spool spool canled near models CG released timer upsetting models lateral direc tional stability inducing steep spiraldive continues until spool contacts ground allowing line slacken thereby permit ting model recover land Gad Finding suitable length line could require iron nerves perhaps computer anyone out has used system let us expenence systems rely some sort timing device actuation Slow-burning fuse common followed mechanical clock work timers Some individuals distrusting mechanical timers use backup fuse well timer Sort like wearing suspenders belt hold up ones pants Timers malfunction occasion fuses go out tooor appear lit theyre actually scorched Some Old-Timers used air pneumatic timers depended needle valve adjustment event reasonable accuracy essential Ive short-fused myself occasion watched model DT prior sure max Other times Ive chased model two three minutes beyond max flight windy rugged conditions 1 26 Model Aviation RIC PILOT LOGBOOK@ AND FLIGHT RECORD *AIRCRAFT FLOWN *FLyING FIELDS *FLIGHT INSTRUCTOR *TOTAL HOURS *WEATHER CONDITIONS * FLIGHT DURATION *TRIM ADJUSTMENTS above can entered own personal flight log tirst time R/C LOGBOOK designed specifically pilot minitiature aircraft Whatever particular skill level may LOGBOOK will add enjoyment A/C flying LOGBOOK has durable hard-bound cover contains sufficient pages record years flying bythe average R/G pilotSil 981 Champion Hobbies$695 Postage Paid Dealer/Distributor inquiries welcomeOhio ,sidento odd 32C ooies tool CHAMPION HOBBIES 3716 Reemelin Cincinnati OH 45211 513 481-6961 What break through TIJNEIJIAEFI1F totally unique flying sensation A very complete precision kit can easily assembled ready operation 8 12 hours required minimum standard 3 channel radio good 60 90 engine complete details contact Dealer Inquiries Invited FIJTIMLITIE 214 Dolomite Drive Downsview Ontario M3J 2P8Tel 416-661 -5562 TEE BAR ALUMINUM EXTRUSION SANDING BLOCK hr mae urn RUFF-STUFF SeN-adhesIve ued payer Large True Sedaca WeetWearOut 116CR $225 Handyta Use 22 Inch $335 RUFF F SELF ADHESIVE SHEET SANOVAVER AXE YOUR OWN SPECIAL SANDING SHAVES Easy Use ijeetum FIne r FIne $ assy gIn dryIng ne MINILsAW $610 COMPACT 10 Inch HACK SAW SAWS ANYTHING ANYWHERE Saw has rugged dIn-cast frame wIth cushitubh chip-past plastic ml trandh RecedIng em ad istabte B bled gIves ess Cuts weed plastIc metal HARDENED MUSIC winE Xtr bledes-3/$1 75 best solution can offer regard make practice test-bum some fuse two three times during contest day Youll surprised burning rate will vary existing con ditions Moisture humidity wind velocity etc have measurable effects Some all-out Duration events Texaco Fuel Allotment Antique etc utilize detherm alizers have noticed however more long-time dethermalizer timers installed models used events boils down willing flier sacrifice model trophy Sometimes flying site size factor competitors want ensure staying field circling model can still get long ways down wind given good air DT timers high-time events com monly available solution make own using works travel alarm clock better yeta kitchen timer Its fairly simple matter add disk trip arm devices resulting inexpensive yet depend able unit course unnecessary weight should removed lightweight dust cover should fitted Bring em back alive Clarence Haught Rt 5 Box 16 Coeur dAlene ID 83814 Truant MCD ermoth Continued page 60 model stalls again add another thickness 1/32 plywood model dives quickly ground no stall put 1/32 x 1 x plywood pieces time between leading edge wing mounts until glide levels off test glides go straight right cut rudder tab shown plan glue itso deflected about 1 / 16 left viewed Buckeye Balsa supplies AAA quality balsa certified aircraft plywood fine Kits Aero Composites Kitty Hawk Models Mr Gs Dave Platt R/C Kits Mfg. VK Models & hobby shops SAMPLE PRICESYour Listcost Balsa 1/16x4x36149112 Balsa 114x4x36266200 Plywood 3/32x1 2x481171878 Plywood 1/8x12x481243932 Spruce 3/1 6x3/1 6x484735 9.I Shipping & handling added orders shipped C 00 U P S Cash Only N 5959 LEFFINGWELL ROAD PHONE 2165333607 IELD OHIO 44406 May 1982 127 first its kind radio controlled ring wing aircraft having flight performance helicopter complexities MINI-STRIPSPRECISION DIE-CUT Medha Garnet SAVES TIME LACEMENTFine Garnet AND EFFORT SANDING BELTSAssid Mater Prool Send $1 catalog Price applied first order Add 20% postage Send 25C catalog
Edition: Model Aviation - 1982/05
Page Numbers: 57, 126, 127
Free Flight OLD- TIMER Clarence Haught SPREAD THE WORD hear time Man Id like have some radiocontrolled models answer Well fly Free Flight reply mean hang gliding Isnt kind dangerous National Free Flight Society believes kids younger adults would interested Free Flight knew existed So NFFS President Tony Italiano has delegated responsibility publicity program Jack Woodard 7985 Sunridge Court Fair Oaks CA 95628 916 961-1829 big job Jack needs help will contact AMA Free Flight clubs problem finding folks out dont have luxury good club help promote Free Flight Jack needs contact people major area state having Free Flight activity Old-Timer movement just small part whole picture have special appeal cabin ships have realism special beauty own also fortunate have events already existence tailor-made beginners 020 Replica event comes mind instantly about special-event half-scale OT 049 glow en gines about full-scale models would fly beautifully inexpensive Baby Bee 049 engines Lets get together behind Jack NFFSand promote Free Flight Take spec tator along next time go out fly Get kid hooked model airplanes Truth advertising Flies 36 mm 15-sec motor run Similar statements introduced advertisements early issues modeling press Thermals unheard average modeler lucky thermal flights credited designer Ive often pondered finishes lack thereof applied old ships considers life expectancy brought about flyaways crashes comes clearer Today models enjoy long service due primarily wide-spread popularity dethermalizer systems Most us familiar pop-up-tail dethermalizer first used Carl Goldberg February 22 1942 system now enjoys worldwide acceptance incorporated basic model design Old-Timer designs can altered ac commodate pop-up-tail system quite easily However others require considerable ingenuity due design complexity fuselage-totail-surface area model Some designs just dont lend themselves Other systems have enjoyed limited popularity Spoilers top surface wing very effective have developed high degree modern RC Glider enthusiasts would rate method high second Carls system Probably third-ranking system would drag chute system whereby small para chute packed suitable compartment anchored tail post deployed proper moment appropriate timer creases drag point model cannot sustain flight Chute size can critical factor Continued page 126 om urine niereajing uciauls James Oggs Powerhouse Photo L shows long-duration timer perched next engine timer booster battery jack between Location timers sim plifies ROG launches Long duration timer Otto Bernhardt 77 Products Tail end R reveals some nice features screw adjustment stab incidence trim good solid alignment keys stab necessity pop-up tail DT rudder mounted stab Jim Redwood City CA Entire tail assembly shifted directional trim Larry Schwarzs problem put pop-up-tail DT Taibi Pacer stab mounts through center aft fuselage Solution 3-piece stab Outer panels rotating LE-down DT Wire TE aligns outer panels pivot wood dowel Hes Las Vegas May 198257 Long duration timer attop fabricated Bob Schaferfrom ordi nary kitchen timer Remove excess weight install mounting plate disk trip notch Release arm mounts timer plate model Allows DT release time up hour after launch problem latest consensus among US fliers also shared some fliers other countries no change should made FiD rules present new class could established explore depth some concepts developed during present discus sion end Erv has brought forth following proposal hammered out aid Dan Domina John Triolo 50cm Intermediate Indoor Duration Model 1 Projected wingspan 50cm 1969 maxi mum 2 Length excluding propeller 50cm maximum 3 Model weight least gram motor 4 Wing area 650 sq cm 10078 sq maximum 5 Stab span 30cm 1181 maximum 6 Stab area 325 sq cm 5039 sq maximum 7 Motor stick length front thrust bearing rear hook 25 cm 984 maximum 8 surfaces covered side 9 Propellers will have two blades no in-flight mechanically-adjusted parts 10 Multiwing area will cumulative 650 sq cm total 11 Models must conform concept simplicity opinion Contest Director modeler has incorporated gross new technology model will declared illegal model scale Scale model Micro-Air distinctive sound intheair. Technopowers 7 cylinder 4 cycle Radial Engine Send $200 catalog products TECHNOPOWER H INC 16650 South 104th AVENUt ORLAND PARK ILLINOIS 60462 Precision Products Box 1129 Richland WA 99352 has produced interesting plan set will enable average flier produce scale weigh Indoor models very nice kit pressure-sensitive labels form necessary beam markings Similar labels furnished can used tem plates cut out several metal parts increase scales durability No actual materi als except labels included kit bill materials included range weights handled scale run 001 oz smallest major graduation beam up 16 oz upper limit scale capacity anyone needs scale has time build plan good buy $3 info picture Bob Meusers column Prop fixtures number occasions column has dealt topic propeller design construction Most Indoor props built blocks carved form required helical twist method new block required propeller has different pitch photo shows method first developed Pete Andrews think since rib station Indoor prop must different angle fixture allows rib station angle individually set according some scheme prop design look closely photo outline FAI prop has fastened fixture prop spar visible beginning just right left-hand support central rod rod number protractors have assembled 1-in intervals protractor has bearing visible locking mechanism holds protractor angle measured line runs along horizontal bar back fixture propeller helical pitch distribution desired blade angle station can calculated Prop pitch basics propeller moves forward 12 in revolution said have effec tive pitch 1 2 definition assums propeller does slip make up building higher pitch basic design formula prop pitch Pitch 6 x tangent blade angle x diameter blade element required blade angle can derived realizing blade element will travel helix defined distance forward prop moves revolution circle same radius radius prop element prop shaft shown drawing graphically derives required blade angle single blade element topic will covered greater detail next time stay tuned Bud Tenny Box 545 Richardson TX 75080 FF Old-Timers/Haught Continued page 57 Too small model will brought down timely manner too big resulting straight-down parachute operation serious damage Ive seen models fly away thermal parachute dethermalizers duti fully following along behind Edito Ditto pop-up stabilizers probably stronger thermals As alternative pop-up-tail can pop up leading edge wing Ive never seen system use suspect some real potential rigglng problems solved anyone out has tried system would like share readers Finally theres spool system volves attaching suitable length line wing tip weight attached other end usually sewing thread spool spool canled near models CG released timer upsetting models lateral direc tional stability inducing steep spiraldive continues until spool contacts ground allowing line slacken thereby permit ting model recover land Gad Finding suitable length line could require iron nerves perhaps computer anyone out has used system let us expenence systems rely some sort timing device actuation Slow-burning fuse common followed mechanical clock work timers Some individuals distrusting mechanical timers use backup fuse well timer Sort like wearing suspenders belt hold up ones pants Timers malfunction occasion fuses go out tooor appear lit theyre actually scorched Some Old-Timers used air pneumatic timers depended needle valve adjustment event reasonable accuracy essential Ive short-fused myself occasion watched model DT prior sure max Other times Ive chased model two three minutes beyond max flight windy rugged conditions 1 26 Model Aviation RIC PILOT LOGBOOK@ AND FLIGHT RECORD *AIRCRAFT FLOWN *FLyING FIELDS *FLIGHT INSTRUCTOR *TOTAL HOURS *WEATHER CONDITIONS * FLIGHT DURATION *TRIM ADJUSTMENTS above can entered own personal flight log tirst time R/C LOGBOOK designed specifically pilot minitiature aircraft Whatever particular skill level may LOGBOOK will add enjoyment A/C flying LOGBOOK has durable hard-bound cover contains sufficient pages record years flying bythe average R/G pilotSil 981 Champion Hobbies$695 Postage Paid Dealer/Distributor inquiries welcomeOhio ,sidento odd 32C ooies tool CHAMPION HOBBIES 3716 Reemelin Cincinnati OH 45211 513 481-6961 What break through TIJNEIJIAEFI1F totally unique flying sensation A very complete precision kit can easily assembled ready operation 8 12 hours required minimum standard 3 channel radio good 60 90 engine complete details contact Dealer Inquiries Invited FIJTIMLITIE 214 Dolomite Drive Downsview Ontario M3J 2P8Tel 416-661 -5562 TEE BAR ALUMINUM EXTRUSION SANDING BLOCK hr mae urn RUFF-STUFF SeN-adhesIve ued payer Large True Sedaca WeetWearOut 116CR $225 Handyta Use 22 Inch $335 RUFF F SELF ADHESIVE SHEET SANOVAVER AXE YOUR OWN SPECIAL SANDING SHAVES Easy Use ijeetum FIne r FIne $ assy gIn dryIng ne MINILsAW $610 COMPACT 10 Inch HACK SAW SAWS ANYTHING ANYWHERE Saw has rugged dIn-cast frame wIth cushitubh chip-past plastic ml trandh RecedIng em ad istabte B bled gIves ess Cuts weed plastIc metal HARDENED MUSIC winE Xtr bledes-3/$1 75 best solution can offer regard make practice test-bum some fuse two three times during contest day Youll surprised burning rate will vary existing con ditions Moisture humidity wind velocity etc have measurable effects Some all-out Duration events Texaco Fuel Allotment Antique etc utilize detherm alizers have noticed however more long-time dethermalizer timers installed models used events boils down willing flier sacrifice model trophy Sometimes flying site size factor competitors want ensure staying field circling model can still get long ways down wind given good air DT timers high-time events com monly available solution make own using works travel alarm clock better yeta kitchen timer Its fairly simple matter add disk trip arm devices resulting inexpensive yet depend able unit course unnecessary weight should removed lightweight dust cover should fitted Bring em back alive Clarence Haught Rt 5 Box 16 Coeur dAlene ID 83814 Truant MCD ermoth Continued page 60 model stalls again add another thickness 1/32 plywood model dives quickly ground no stall put 1/32 x 1 x plywood pieces time between leading edge wing mounts until glide levels off test glides go straight right cut rudder tab shown plan glue itso deflected about 1 / 16 left viewed Buckeye Balsa supplies AAA quality balsa certified aircraft plywood fine Kits Aero Composites Kitty Hawk Models Mr Gs Dave Platt R/C Kits Mfg. VK Models & hobby shops SAMPLE PRICESYour Listcost Balsa 1/16x4x36149112 Balsa 114x4x36266200 Plywood 3/32x1 2x481171878 Plywood 1/8x12x481243932 Spruce 3/1 6x3/1 6x484735 9.I Shipping & handling added orders shipped C 00 U P S Cash Only N 5959 LEFFINGWELL ROAD PHONE 2165333607 IELD OHIO 44406 May 1982 127 first its kind radio controlled ring wing aircraft having flight performance helicopter complexities MINI-STRIPSPRECISION DIE-CUT Medha Garnet SAVES TIME LACEMENTFine Garnet AND EFFORT SANDING BELTSAssid Mater Prool Send $1 catalog Price applied first order Add 20% postage Send 25C catalog