Joe Beshar author original 1940 model left hand brand-new ignition-powered job right foreground model articlethe large elevator shows clearly Build contest winner yore either Old-Timer Free Flight Radio-Assist shut-off retrieval no longer have big flying site Close-up ignition-Bantdm free-flight ver sion shows Austin timer condenser points bottom Tatone timer dethermalizer FOX SHORTLY AFTER Academy Model Aeronautics decided publish Model Aviation decided submit article Radio-Assisted Old-Timer free flight encouraged editor stated understood sort thing close heart Putting mildly very close heart first really didnt know what offer things After considerable throught occurred perhaps Fox Class-A free flight model created back 1940 might interest modeling com munity old-time free flight since fine performer its day Radio-Assist enjoyable fly Sometime ago found original model stored mothers attic during years balsa wood dried out Silkspan covering cracked After finding model also fortunate finding original plans built replica original 42 model flew ignition-powered placing second SAMS Champs Lake hurst NJ 1974 also built RC ver sion am including article Since returning modeling circle 1964 have active radio control modeling basically due limited free-flight fields eastern US long thereafter realized free-flight modeler accepted reluc tance concept adding radio control free flight could understand feeling After too dyedin-the-wool free fighter RC added pleasant new dimension long after involvement Old-Timer free flight member Society Antique Modelers came realize order free flight survive area need method retrieve free-flight models order avoid loss SAM recognized RC-Assist event Old-Timer free flight opened new horizons modeling activities since enabled flying free-flight model out ordinary football field retriev ing before could fly away know free-flight models have dethermalizer timer engine shut off doesnt mean cant lose model does happen free fighters Radio Control-Assist functions can implemented addi tionally ability retrieve model flight now part system Further basic free flight characteristics pre served transmitter manipulated time bring aircraft back its take-off site RC-Assist movement pres ent time ruling can use transmitter during engine run shut engine off further control model during its soaring period personal TI-TI goal am confident will happen future rules state transmitter used shut engine off subsequently allowing model per form according its normal free flight characteristics use trans mitter case free flight activities event model caught thermal kind trouble modeler decides use radio control model moment uses transmitter control flight would considered over Please note personal goal feel would restore true free flight characteristics requiring skills trim such model would different would ability return model its launching point event trouble modeler saw fit control has honor president Society Antique Mod elers circle free flight activity ultimate aim obtain acceptance type ruling Further humble feeling free flight cluding modern free flight activity matter time type RC Assist will have employed order free flight survive reason areas just no free-flight fields modeler thing unless travels 50 100 miles out town can tricky enough theories Lets go Fox Initially will describe construction Fox original ignition-powered Class model follow supplements necessary adapt RC Assist presenting article manner will enable modeler apply principles RC-Assist oldtime modern free-flight model July1976 43 RC assist version cowl block removed show mounts shut-off linkage Note battery box under engine balancing Cox TD 09 required 5 degrees downthrust Bantam 19 Hatch removed ignition free-flight version shows location Austin timer battery box Under present SAM ruling AssistIn Radio-Assist version same compartment allowed plenty X-mitter can used shut-off soaringroom Logictrol LRB-3 brick Beshar used Covering model silk fuselaae Monokote wino tail Fuselage The fuselage constructed 3/16 sq balsa Build side view plans shown cover side structure 1/16 balsa sheet Next top view cut 3/16 cross members box bottom section fuselage together basic struc ture Now cut sheet balsa entire profile top base structure pylon firewall front rudder glued centerline top base structure fuselage Formers 1 2 3 cut out glued respective position formers 4 5 6 fill-in triangles cut glued center profile fuselage frame top Next cut pylon mount platform 1/s sheet balsa form shown top view Install plywood firewall Obtain 3/32 piano wire bend form shown drill 1/16 holes through firewall along form bent 3/32 piano wire thread landing gear firewall 654320 ENGLISH 1940 2 PECES I/B 1/2 BALSA LAMINATED 7 I/B H 1/4 BALSA I3/16 SQUARE BALSAI/B SHEET BALSA CENTER PROFLE - rzsgZ-ZWt GOLDBERG SHORTSYNOD CONTROL CONTROL HORNSTAIL SKID REMOVEDPUSH-RODS AND MINI-SNAPSFOR CLARITY S 3 PIECES - I/B SQUARE BALSA LAMINATED 4 3 ECES 1/8 SQUARE BALSA LAMINATED S 3/16 SQUARE BALSA STRINGERS AND CROSS PIECES R-C ASSIST RUDDER MODIFICATION THE FOX OLD TIMER FREE-FLIGIT WITH DETAILS FOR MODIFICATION TO RADIO CONTROL ASSIST DESIGNED BY JOE BESHAR SEPTEMBER 2 1940 DRAWN AND INKED BY BILL BOOTH JR I/B x 5/16 BALSAGOLDBERG NYLON HINGE-ANCHOR SPARMINI-SNAPS1/16 BALSA SHEET RIBS - U4V -- GOLDBERG SH~ CONTROL HORN E-K PLASTIC HINGES EPOXY IN PLACE R-C ASSIST STAB MODIFICATION FOR 1 1/16 BALSA SHEET --5/16 SHEET BALSA 3/16 BIRCH DOWEL EPOXY IN PLACE TAIL SKIDVUIUJt FUEL SHUT-OFF SYSTEMVIEW FROM THE BOTTOM CABLE TINNED WITH f- ITH HATCH REMOVEDII SOLDER FOR STIFFNESSrSEf-SHOWING ECTIONSNIII ElIII AFTER BENDING , -- 3A6 TO FUEL nTE-K LRB-3TO ELEVATOR INAs2 SERVO TO RUDDER I/I6 LOCATION OF 5/16 I/B HINGEANCHOR SPAR FOR R-C ELEVATOR PERFECTRADIO ARRANGEMENT AND FUEL INSTALLATION FUEL SHUT-OFFTANK SEE DETAIL /II ATTACH WITH SERVO TAPE _____ITOOG___________ MOOFY 2 PINE MOUNTS TOFIT-______ - I/B 1:E-K LRB-3GOLDBERG 1BJK3 2 SERVOMINI- SNAPS QQW&kIaJSIBRICK SCREW EYE 225 MA BATTERY PACK\ RUBBER BANDGOLD-N-RODI/B BALSA HATCH BRAIDED CABLE PUSH ROD -- FUSELAGE SIDES AND CHEEKS -REMOVED FOR CLARITY PLYWOOD NYROD PUSH RODS BIRCH DOWEL 1/16 BALSA SHEET F - - 14 5 - zz 1 2 i RUDDER IIR OVER CENTER II Ii- a71 RIB I/B BALSA TOP AND BOTTOM SQUARE BALSA TOP AND BOTTOM 6 DINBORAL 3 1-1/4 1A6 SHEET BALSA - FUSELAGE SIDES IGNITION BATTERIES TEI Mfl CON NE C 1/6 BALSA SHEET CENTER PROFILE 1/8 BIRCH DOWEL 7030 ALUMINUM STAB PLATFORM BALSA 040 PIANOI/B HOOKS NOTCH 21 I/Il LA 3/16 SQUARE -- BALSA 1/16 00 ALUMINUM NG TOP I/B BALSA3/16030 ALUM NUM SHEETISQUARE STAB P ATFORM BALSA 1/6 5/16 BALSA 1/16 BALSA SHEET RIBS 030 ALUMINUM TRIM TABAI/B BALSA6 SHEET I/B BALSA SHEETO B BRCH DOWEL 1/16 00 ALUMINUM TUBINGI/B BALSA -SHEET TAIL SKIDS 040 PIANO WIRE HOOKS 44 Model Aviation 012345 IS through holes heavy sewing thread epoxy position motor mounts made epoxied wood screwed firewall shown plan Cut out form 1 diam eter wheel balsa epoxy dowel through center wheel Drill 3/32 hole axle assem w 9 I0 195 B 13 14 TIPS 1212 EACH DIHEDRAL BRACES CENTER 121I EACH w ble wheel landing gear soldered washers Make removable hatch between firewall station 4 a sheet Position dowels shown limits hatch depth holds hatch place rubber bands Cut out install Austin timer ignition location shown InczhZZZL II 10 9 -B 7 6 5 4 3 2 ALL RIBS 1/16 BALSA SlEET NOTCH FOR SPORS WHILE ASSEMBLING CUT ONE AND TWO EACH -I4 PYLON FORMERSI/B BALSA WING PLATFORM p TO ENGINE CASEI/B BIRCH DOWEL I/B BALSA CENTER PROFILE I/B SHEET BALSA JSELAGE FORMERCHEEKS ATTACHEDI/B BALSA WITH 4-40 ALLENFORMERS Fl HEAD SCREWS 1/16 BALSA SIDESI/B PLY D FIREWALLNUTS 3/16SQUARE 4-40 BLIND-- I/B SHEET-- ----OF MOLPITSBALSAPROFILE-5\I PROF44-1 -1/2 RNE ENGINELANDING GEAR I/B PLYMOUNTS EPOXYWIRE TO FIREWALL LB BIRCH DOWEL--TO FIREWALLWITH THEEAD 1/16 BALSA SHEET FIREWALL3/4 WOOD SCREWAM EPOXY 030 ALUMINUMSPARS STAB PLATFORM BA I/B BALSA "\~FORMER 6SlEET CENTERBANTAM 19 IGMTION DOWELI/B PLY COIL i I/BBALSA - I/IA BALSABATTERIESSHEET ClERKS __ __ATTACH WITH FUSELAGE4-40 ALLEN HE - SIDES WS AUSTIN - TIMER 3/4 WOOD SCREW EPOXY TATONE D-TI/B BALSA SHEETI/B PINE ENGINE TIMERHATCH REMOVABLEMOUNTS TO 3/RI SQUARE BALSA STRINGERS STIFFENERSI/B PLY FIREWALLFIREWALL AND CROSS FECES 3/35 PIANO WIREBALSAWHE stall ignition engine Dimensions illustrated Bantam 19 may varied other Class engine Install high-tension coil condenser battery box place shown wire accordance ignition hook-up diagram course ignition engines hard come byunless lucky enough have hand own old days Ignition engines say nothing older glow engines long since collectors items quite ex pensive Fortunately SAM rules make allowance problem will read about installation TD 09 glow deeper article interest ing reflection glow engine half size ignition engine can develop power ignition engine double displacement ran gas oiland course dont have lug around ignition sys tem parts whiz starting cranky engine system Wing wing constructed 1/16 sheet balsa ribs t tip form ers alsa spars trailing edge three aminated balsa strips leading edge two pieces x es balsa laminated Apply glue tween laminations Lay pin lead ing edge plan accordance profile trailing edge glue three pieces alsa strips follow same procedure Shim up frontof trailing edge 1/32 Cut t wing tip formers glue place Cut ribs accordance templates shown glue insert leading trailing edge shown plan view wing After glue sets remove wing plan cut leading trailing edge glue polyhedral dimen sions shown Lay wing spars plan locations across top wing mark pencil notch ribs single edge razor blade accept spars After notch ing place glue spars place top bottom wing Cut templates plan polyhedral dihedral join ers t glue place Cover center wing section 1/16 balsa sheet fitted between center section ribs Trim sand wing carefully prepara tion covering Stabilizer The stabilizer constructed 3/16 sq balsa leading edge three aminated balsa strips trailing edge t balsa tips Place 3/16 sq leading edge place pinning plan view stabilizer Place pin glue three alsa strips trailing edge shown plans cut out glue sheet tip formers Glue x 3A balsa main spar place cut glue ribs 1/16 x 3A balsa After glue sets trim sand ribs accordance airfoil section elevator Finally place par bottom stabilizer notching ribs assembly necessary glue place Cut two tail skids July1976 45 AND RECESSED BETWEEN RIBS AND BOTTOM FRONT OF TRAILING EDGE 1/52 ALONG FULL SPAN BEFORE ASSEMBLING WING STRUCTURE AM K- UP LUG NPOINTS CONDENSER Pop-up tail linkage PP version Upon re lease dethermalizer cord Tatone timer tail assumes 45-degree angle OTing Details movable rudder elevators RC-Assist version Hole elevator clears rudder flipper up SAM rules require 09 Radio-Assist model Fox t contoured shown readi ness installation after covering Rudder Construct rudder 3/16 sq balsa leading edge t trailing edge cutting gluing plan view Next raise outline rudder 1/16 off plan packing Assemble glue Vs x 5/16 balsa main spar 1/16 x 5/16 ribs Bottom rib cut balsa sheet After glue has dried remove plan trim airfoil section sand final rudder configuration Covering wing tail covered Silkspan finished two coats dope entire fuselage covered silk including pylon resulting free form curvature shown photos Finish two coats dope After covering glue tail skids elevator bottom dethermalizer use Tatone timer stall hatch shown photograph brick receiver servo control placed smack-up against firewall shown shut-off down elevator control linked engine shut-off order avoid need third servo Elevator rudder linkages shown third servo can used engine shut-off inde pendently desired will note modem version Fox RC-Assist did use Mono kote covering wing tail surfaces rained silk covering fuselage found covering combination durable resisting damage Experienced free fightersand have already tried RC-Assist will know Fox adjusted flight just would normally prepare model configuration can use own favorite adjustments may neces sary point out newcomerwho may old free fighter toothat Fox does have flown continuously radio would sport flying can allow climb fast steeplylike contest-type free-flight model sport RC Radio-Assist can employed described Shut-off engine want retrieveand maybe savethe model threatens fly away Doing rare exciting experienceone would never guess much pleasure common sense could added time-honored free flight Nothing lost much added Bottom view ignition version free flight shows rubber band keeps tension DT line until release Adapting RC-Assist adapting Fox RC-Assist construct rudder elevator controls hinge parting lines added con struction hinges control linkage shown RC adaptation plan conform SAM rules TD 09 Cox engine mounted shown plans Due extra power five degrees down-thrust may required keep model stable during engine run addition engine mounted wood aluminum engine mounts cowling sides removable servicing Wood engine mounts shown draw ing Note 225 MA battery pack mounted under engine front firewall obtain proper balance original model EK-Logictrol LRB-3 46 Model Aviation
Edition: Model Aviation - 1976/07
Page Numbers: 42, 43, 44, 45, 46
Joe Beshar author original 1940 model left hand brand-new ignition-powered job right foreground model articlethe large elevator shows clearly Build contest winner yore either Old-Timer Free Flight Radio-Assist shut-off retrieval no longer have big flying site Close-up ignition-Bantdm free-flight ver sion shows Austin timer condenser points bottom Tatone timer dethermalizer FOX SHORTLY AFTER Academy Model Aeronautics decided publish Model Aviation decided submit article Radio-Assisted Old-Timer free flight encouraged editor stated understood sort thing close heart Putting mildly very close heart first really didnt know what offer things After considerable throught occurred perhaps Fox Class-A free flight model created back 1940 might interest modeling com munity old-time free flight since fine performer its day Radio-Assist enjoyable fly Sometime ago found original model stored mothers attic during years balsa wood dried out Silkspan covering cracked After finding model also fortunate finding original plans built replica original 42 model flew ignition-powered placing second SAMS Champs Lake hurst NJ 1974 also built RC ver sion am including article Since returning modeling circle 1964 have active radio control modeling basically due limited free-flight fields eastern US long thereafter realized free-flight modeler accepted reluc tance concept adding radio control free flight could understand feeling After too dyedin-the-wool free fighter RC added pleasant new dimension long after involvement Old-Timer free flight member Society Antique Modelers came realize order free flight survive area need method retrieve free-flight models order avoid loss SAM recognized RC-Assist event Old-Timer free flight opened new horizons modeling activities since enabled flying free-flight model out ordinary football field retriev ing before could fly away know free-flight models have dethermalizer timer engine shut off doesnt mean cant lose model does happen free fighters Radio Control-Assist functions can implemented addi tionally ability retrieve model flight now part system Further basic free flight characteristics pre served transmitter manipulated time bring aircraft back its take-off site RC-Assist movement pres ent time ruling can use transmitter during engine run shut engine off further control model during its soaring period personal TI-TI goal am confident will happen future rules state transmitter used shut engine off subsequently allowing model per form according its normal free flight characteristics use trans mitter case free flight activities event model caught thermal kind trouble modeler decides use radio control model moment uses transmitter control flight would considered over Please note personal goal feel would restore true free flight characteristics requiring skills trim such model would different would ability return model its launching point event trouble modeler saw fit control has honor president Society Antique Mod elers circle free flight activity ultimate aim obtain acceptance type ruling Further humble feeling free flight cluding modern free flight activity matter time type RC Assist will have employed order free flight survive reason areas just no free-flight fields modeler thing unless travels 50 100 miles out town can tricky enough theories Lets go Fox Initially will describe construction Fox original ignition-powered Class model follow supplements necessary adapt RC Assist presenting article manner will enable modeler apply principles RC-Assist oldtime modern free-flight model July1976 43 RC assist version cowl block removed show mounts shut-off linkage Note battery box under engine balancing Cox TD 09 required 5 degrees downthrust Bantam 19 Hatch removed ignition free-flight version shows location Austin timer battery box Under present SAM ruling AssistIn Radio-Assist version same compartment allowed plenty X-mitter can used shut-off soaringroom Logictrol LRB-3 brick Beshar used Covering model silk fuselaae Monokote wino tail Fuselage The fuselage constructed 3/16 sq balsa Build side view plans shown cover side structure 1/16 balsa sheet Next top view cut 3/16 cross members box bottom section fuselage together basic struc ture Now cut sheet balsa entire profile top base structure pylon firewall front rudder glued centerline top base structure fuselage Formers 1 2 3 cut out glued respective position formers 4 5 6 fill-in triangles cut glued center profile fuselage frame top Next cut pylon mount platform 1/s sheet balsa form shown top view Install plywood firewall Obtain 3/32 piano wire bend form shown drill 1/16 holes through firewall along form bent 3/32 piano wire thread landing gear firewall 654320 ENGLISH 1940 2 PECES I/B 1/2 BALSA LAMINATED 7 I/B H 1/4 BALSA I3/16 SQUARE BALSAI/B SHEET BALSA CENTER PROFLE - rzsgZ-ZWt GOLDBERG SHORTSYNOD CONTROL CONTROL HORNSTAIL SKID REMOVEDPUSH-RODS AND MINI-SNAPSFOR CLARITY S 3 PIECES - I/B SQUARE BALSA LAMINATED 4 3 ECES 1/8 SQUARE BALSA LAMINATED S 3/16 SQUARE BALSA STRINGERS AND CROSS PIECES R-C ASSIST RUDDER MODIFICATION THE FOX OLD TIMER FREE-FLIGIT WITH DETAILS FOR MODIFICATION TO RADIO CONTROL ASSIST DESIGNED BY JOE BESHAR SEPTEMBER 2 1940 DRAWN AND INKED BY BILL BOOTH JR I/B x 5/16 BALSAGOLDBERG NYLON HINGE-ANCHOR SPARMINI-SNAPS1/16 BALSA SHEET RIBS - U4V -- GOLDBERG SH~ CONTROL HORN E-K PLASTIC HINGES EPOXY IN PLACE R-C ASSIST STAB MODIFICATION FOR 1 1/16 BALSA SHEET --5/16 SHEET BALSA 3/16 BIRCH DOWEL EPOXY IN PLACE TAIL SKIDVUIUJt FUEL SHUT-OFF SYSTEMVIEW FROM THE BOTTOM CABLE TINNED WITH f- ITH HATCH REMOVEDII SOLDER FOR STIFFNESSrSEf-SHOWING ECTIONSNIII ElIII AFTER BENDING , -- 3A6 TO FUEL nTE-K LRB-3TO ELEVATOR INAs2 SERVO TO RUDDER I/I6 LOCATION OF 5/16 I/B HINGEANCHOR SPAR FOR R-C ELEVATOR PERFECTRADIO ARRANGEMENT AND FUEL INSTALLATION FUEL SHUT-OFFTANK SEE DETAIL /II ATTACH WITH SERVO TAPE _____ITOOG___________ MOOFY 2 PINE MOUNTS TOFIT-______ - I/B 1:E-K LRB-3GOLDBERG 1BJK3 2 SERVOMINI- SNAPS QQW&kIaJSIBRICK SCREW EYE 225 MA BATTERY PACK\ RUBBER BANDGOLD-N-RODI/B BALSA HATCH BRAIDED CABLE PUSH ROD -- FUSELAGE SIDES AND CHEEKS -REMOVED FOR CLARITY PLYWOOD NYROD PUSH RODS BIRCH DOWEL 1/16 BALSA SHEET F - - 14 5 - zz 1 2 i RUDDER IIR OVER CENTER II Ii- a71 RIB I/B BALSA TOP AND BOTTOM SQUARE BALSA TOP AND BOTTOM 6 DINBORAL 3 1-1/4 1A6 SHEET BALSA - FUSELAGE SIDES IGNITION BATTERIES TEI Mfl CON NE C 1/6 BALSA SHEET CENTER PROFILE 1/8 BIRCH DOWEL 7030 ALUMINUM STAB PLATFORM BALSA 040 PIANOI/B HOOKS NOTCH 21 I/Il LA 3/16 SQUARE -- BALSA 1/16 00 ALUMINUM NG TOP I/B BALSA3/16030 ALUM NUM SHEETISQUARE STAB P ATFORM BALSA 1/6 5/16 BALSA 1/16 BALSA SHEET RIBS 030 ALUMINUM TRIM TABAI/B BALSA6 SHEET I/B BALSA SHEETO B BRCH DOWEL 1/16 00 ALUMINUM TUBINGI/B BALSA -SHEET TAIL SKIDS 040 PIANO WIRE HOOKS 44 Model Aviation 012345 IS through holes heavy sewing thread epoxy position motor mounts made epoxied wood screwed firewall shown plan Cut out form 1 diam eter wheel balsa epoxy dowel through center wheel Drill 3/32 hole axle assem w 9 I0 195 B 13 14 TIPS 1212 EACH DIHEDRAL BRACES CENTER 121I EACH w ble wheel landing gear soldered washers Make removable hatch between firewall station 4 a sheet Position dowels shown limits hatch depth holds hatch place rubber bands Cut out install Austin timer ignition location shown InczhZZZL II 10 9 -B 7 6 5 4 3 2 ALL RIBS 1/16 BALSA SlEET NOTCH FOR SPORS WHILE ASSEMBLING CUT ONE AND TWO EACH -I4 PYLON FORMERSI/B BALSA WING PLATFORM p TO ENGINE CASEI/B BIRCH DOWEL I/B BALSA CENTER PROFILE I/B SHEET BALSA JSELAGE FORMERCHEEKS ATTACHEDI/B BALSA WITH 4-40 ALLENFORMERS Fl HEAD SCREWS 1/16 BALSA SIDESI/B PLY D FIREWALLNUTS 3/16SQUARE 4-40 BLIND-- I/B SHEET-- ----OF MOLPITSBALSAPROFILE-5\I PROF44-1 -1/2 RNE ENGINELANDING GEAR I/B PLYMOUNTS EPOXYWIRE TO FIREWALL LB BIRCH DOWEL--TO FIREWALLWITH THEEAD 1/16 BALSA SHEET FIREWALL3/4 WOOD SCREWAM EPOXY 030 ALUMINUMSPARS STAB PLATFORM BA I/B BALSA "\~FORMER 6SlEET CENTERBANTAM 19 IGMTION DOWELI/B PLY COIL i I/BBALSA - I/IA BALSABATTERIESSHEET ClERKS __ __ATTACH WITH FUSELAGE4-40 ALLEN HE - SIDES WS AUSTIN - TIMER 3/4 WOOD SCREW EPOXY TATONE D-TI/B BALSA SHEETI/B PINE ENGINE TIMERHATCH REMOVABLEMOUNTS TO 3/RI SQUARE BALSA STRINGERS STIFFENERSI/B PLY FIREWALLFIREWALL AND CROSS FECES 3/35 PIANO WIREBALSAWHE stall ignition engine Dimensions illustrated Bantam 19 may varied other Class engine Install high-tension coil condenser battery box place shown wire accordance ignition hook-up diagram course ignition engines hard come byunless lucky enough have hand own old days Ignition engines say nothing older glow engines long since collectors items quite ex pensive Fortunately SAM rules make allowance problem will read about installation TD 09 glow deeper article interest ing reflection glow engine half size ignition engine can develop power ignition engine double displacement ran gas oiland course dont have lug around ignition sys tem parts whiz starting cranky engine system Wing wing constructed 1/16 sheet balsa ribs t tip form ers alsa spars trailing edge three aminated balsa strips leading edge two pieces x es balsa laminated Apply glue tween laminations Lay pin lead ing edge plan accordance profile trailing edge glue three pieces alsa strips follow same procedure Shim up frontof trailing edge 1/32 Cut t wing tip formers glue place Cut ribs accordance templates shown glue insert leading trailing edge shown plan view wing After glue sets remove wing plan cut leading trailing edge glue polyhedral dimen sions shown Lay wing spars plan locations across top wing mark pencil notch ribs single edge razor blade accept spars After notch ing place glue spars place top bottom wing Cut templates plan polyhedral dihedral join ers t glue place Cover center wing section 1/16 balsa sheet fitted between center section ribs Trim sand wing carefully prepara tion covering Stabilizer The stabilizer constructed 3/16 sq balsa leading edge three aminated balsa strips trailing edge t balsa tips Place 3/16 sq leading edge place pinning plan view stabilizer Place pin glue three alsa strips trailing edge shown plans cut out glue sheet tip formers Glue x 3A balsa main spar place cut glue ribs 1/16 x 3A balsa After glue sets trim sand ribs accordance airfoil section elevator Finally place par bottom stabilizer notching ribs assembly necessary glue place Cut two tail skids July1976 45 AND RECESSED BETWEEN RIBS AND BOTTOM FRONT OF TRAILING EDGE 1/52 ALONG FULL SPAN BEFORE ASSEMBLING WING STRUCTURE AM K- UP LUG NPOINTS CONDENSER Pop-up tail linkage PP version Upon re lease dethermalizer cord Tatone timer tail assumes 45-degree angle OTing Details movable rudder elevators RC-Assist version Hole elevator clears rudder flipper up SAM rules require 09 Radio-Assist model Fox t contoured shown readi ness installation after covering Rudder Construct rudder 3/16 sq balsa leading edge t trailing edge cutting gluing plan view Next raise outline rudder 1/16 off plan packing Assemble glue Vs x 5/16 balsa main spar 1/16 x 5/16 ribs Bottom rib cut balsa sheet After glue has dried remove plan trim airfoil section sand final rudder configuration Covering wing tail covered Silkspan finished two coats dope entire fuselage covered silk including pylon resulting free form curvature shown photos Finish two coats dope After covering glue tail skids elevator bottom dethermalizer use Tatone timer stall hatch shown photograph brick receiver servo control placed smack-up against firewall shown shut-off down elevator control linked engine shut-off order avoid need third servo Elevator rudder linkages shown third servo can used engine shut-off inde pendently desired will note modem version Fox RC-Assist did use Mono kote covering wing tail surfaces rained silk covering fuselage found covering combination durable resisting damage Experienced free fightersand have already tried RC-Assist will know Fox adjusted flight just would normally prepare model configuration can use own favorite adjustments may neces sary point out newcomerwho may old free fighter toothat Fox does have flown continuously radio would sport flying can allow climb fast steeplylike contest-type free-flight model sport RC Radio-Assist can employed described Shut-off engine want retrieveand maybe savethe model threatens fly away Doing rare exciting experienceone would never guess much pleasure common sense could added time-honored free flight Nothing lost much added Bottom view ignition version free flight shows rubber band keeps tension DT line until release Adapting RC-Assist adapting Fox RC-Assist construct rudder elevator controls hinge parting lines added con struction hinges control linkage shown RC adaptation plan conform SAM rules TD 09 Cox engine mounted shown plans Due extra power five degrees down-thrust may required keep model stable during engine run addition engine mounted wood aluminum engine mounts cowling sides removable servicing Wood engine mounts shown draw ing Note 225 MA battery pack mounted under engine front firewall obtain proper balance original model EK-Logictrol LRB-3 46 Model Aviation
Edition: Model Aviation - 1976/07
Page Numbers: 42, 43, 44, 45, 46
Joe Beshar author original 1940 model left hand brand-new ignition-powered job right foreground model articlethe large elevator shows clearly Build contest winner yore either Old-Timer Free Flight Radio-Assist shut-off retrieval no longer have big flying site Close-up ignition-Bantdm free-flight ver sion shows Austin timer condenser points bottom Tatone timer dethermalizer FOX SHORTLY AFTER Academy Model Aeronautics decided publish Model Aviation decided submit article Radio-Assisted Old-Timer free flight encouraged editor stated understood sort thing close heart Putting mildly very close heart first really didnt know what offer things After considerable throught occurred perhaps Fox Class-A free flight model created back 1940 might interest modeling com munity old-time free flight since fine performer its day Radio-Assist enjoyable fly Sometime ago found original model stored mothers attic during years balsa wood dried out Silkspan covering cracked After finding model also fortunate finding original plans built replica original 42 model flew ignition-powered placing second SAMS Champs Lake hurst NJ 1974 also built RC ver sion am including article Since returning modeling circle 1964 have active radio control modeling basically due limited free-flight fields eastern US long thereafter realized free-flight modeler accepted reluc tance concept adding radio control free flight could understand feeling After too dyedin-the-wool free fighter RC added pleasant new dimension long after involvement Old-Timer free flight member Society Antique Modelers came realize order free flight survive area need method retrieve free-flight models order avoid loss SAM recognized RC-Assist event Old-Timer free flight opened new horizons modeling activities since enabled flying free-flight model out ordinary football field retriev ing before could fly away know free-flight models have dethermalizer timer engine shut off doesnt mean cant lose model does happen free fighters Radio Control-Assist functions can implemented addi tionally ability retrieve model flight now part system Further basic free flight characteristics pre served transmitter manipulated time bring aircraft back its take-off site RC-Assist movement pres ent time ruling can use transmitter during engine run shut engine off further control model during its soaring period personal TI-TI goal am confident will happen future rules state transmitter used shut engine off subsequently allowing model per form according its normal free flight characteristics use trans mitter case free flight activities event model caught thermal kind trouble modeler decides use radio control model moment uses transmitter control flight would considered over Please note personal goal feel would restore true free flight characteristics requiring skills trim such model would different would ability return model its launching point event trouble modeler saw fit control has honor president Society Antique Mod elers circle free flight activity ultimate aim obtain acceptance type ruling Further humble feeling free flight cluding modern free flight activity matter time type RC Assist will have employed order free flight survive reason areas just no free-flight fields modeler thing unless travels 50 100 miles out town can tricky enough theories Lets go Fox Initially will describe construction Fox original ignition-powered Class model follow supplements necessary adapt RC Assist presenting article manner will enable modeler apply principles RC-Assist oldtime modern free-flight model July1976 43 RC assist version cowl block removed show mounts shut-off linkage Note battery box under engine balancing Cox TD 09 required 5 degrees downthrust Bantam 19 Hatch removed ignition free-flight version shows location Austin timer battery box Under present SAM ruling AssistIn Radio-Assist version same compartment allowed plenty X-mitter can used shut-off soaringroom Logictrol LRB-3 brick Beshar used Covering model silk fuselaae Monokote wino tail Fuselage The fuselage constructed 3/16 sq balsa Build side view plans shown cover side structure 1/16 balsa sheet Next top view cut 3/16 cross members box bottom section fuselage together basic struc ture Now cut sheet balsa entire profile top base structure pylon firewall front rudder glued centerline top base structure fuselage Formers 1 2 3 cut out glued respective position formers 4 5 6 fill-in triangles cut glued center profile fuselage frame top Next cut pylon mount platform 1/s sheet balsa form shown top view Install plywood firewall Obtain 3/32 piano wire bend form shown drill 1/16 holes through firewall along form bent 3/32 piano wire thread landing gear firewall 654320 ENGLISH 1940 2 PECES I/B 1/2 BALSA LAMINATED 7 I/B H 1/4 BALSA I3/16 SQUARE BALSAI/B SHEET BALSA CENTER PROFLE - rzsgZ-ZWt GOLDBERG SHORTSYNOD CONTROL CONTROL HORNSTAIL SKID REMOVEDPUSH-RODS AND MINI-SNAPSFOR CLARITY S 3 PIECES - I/B SQUARE BALSA LAMINATED 4 3 ECES 1/8 SQUARE BALSA LAMINATED S 3/16 SQUARE BALSA STRINGERS AND CROSS PIECES R-C ASSIST RUDDER MODIFICATION THE FOX OLD TIMER FREE-FLIGIT WITH DETAILS FOR MODIFICATION TO RADIO CONTROL ASSIST DESIGNED BY JOE BESHAR SEPTEMBER 2 1940 DRAWN AND INKED BY BILL BOOTH JR I/B x 5/16 BALSAGOLDBERG NYLON HINGE-ANCHOR SPARMINI-SNAPS1/16 BALSA SHEET RIBS - U4V -- GOLDBERG SH~ CONTROL HORN E-K PLASTIC HINGES EPOXY IN PLACE R-C ASSIST STAB MODIFICATION FOR 1 1/16 BALSA SHEET --5/16 SHEET BALSA 3/16 BIRCH DOWEL EPOXY IN PLACE TAIL SKIDVUIUJt FUEL SHUT-OFF SYSTEMVIEW FROM THE BOTTOM CABLE TINNED WITH f- ITH HATCH REMOVEDII SOLDER FOR STIFFNESSrSEf-SHOWING ECTIONSNIII ElIII AFTER BENDING , -- 3A6 TO FUEL nTE-K LRB-3TO ELEVATOR INAs2 SERVO TO RUDDER I/I6 LOCATION OF 5/16 I/B HINGEANCHOR SPAR FOR R-C ELEVATOR PERFECTRADIO ARRANGEMENT AND FUEL INSTALLATION FUEL SHUT-OFFTANK SEE DETAIL /II ATTACH WITH SERVO TAPE _____ITOOG___________ MOOFY 2 PINE MOUNTS TOFIT-______ - I/B 1:E-K LRB-3GOLDBERG 1BJK3 2 SERVOMINI- SNAPS QQW&kIaJSIBRICK SCREW EYE 225 MA BATTERY PACK\ RUBBER BANDGOLD-N-RODI/B BALSA HATCH BRAIDED CABLE PUSH ROD -- FUSELAGE SIDES AND CHEEKS -REMOVED FOR CLARITY PLYWOOD NYROD PUSH RODS BIRCH DOWEL 1/16 BALSA SHEET F - - 14 5 - zz 1 2 i RUDDER IIR OVER CENTER II Ii- a71 RIB I/B BALSA TOP AND BOTTOM SQUARE BALSA TOP AND BOTTOM 6 DINBORAL 3 1-1/4 1A6 SHEET BALSA - FUSELAGE SIDES IGNITION BATTERIES TEI Mfl CON NE C 1/6 BALSA SHEET CENTER PROFILE 1/8 BIRCH DOWEL 7030 ALUMINUM STAB PLATFORM BALSA 040 PIANOI/B HOOKS NOTCH 21 I/Il LA 3/16 SQUARE -- BALSA 1/16 00 ALUMINUM NG TOP I/B BALSA3/16030 ALUM NUM SHEETISQUARE STAB P ATFORM BALSA 1/6 5/16 BALSA 1/16 BALSA SHEET RIBS 030 ALUMINUM TRIM TABAI/B BALSA6 SHEET I/B BALSA SHEETO B BRCH DOWEL 1/16 00 ALUMINUM TUBINGI/B BALSA -SHEET TAIL SKIDS 040 PIANO WIRE HOOKS 44 Model Aviation 012345 IS through holes heavy sewing thread epoxy position motor mounts made epoxied wood screwed firewall shown plan Cut out form 1 diam eter wheel balsa epoxy dowel through center wheel Drill 3/32 hole axle assem w 9 I0 195 B 13 14 TIPS 1212 EACH DIHEDRAL BRACES CENTER 121I EACH w ble wheel landing gear soldered washers Make removable hatch between firewall station 4 a sheet Position dowels shown limits hatch depth holds hatch place rubber bands Cut out install Austin timer ignition location shown InczhZZZL II 10 9 -B 7 6 5 4 3 2 ALL RIBS 1/16 BALSA SlEET NOTCH FOR SPORS WHILE ASSEMBLING CUT ONE AND TWO EACH -I4 PYLON FORMERSI/B BALSA WING PLATFORM p TO ENGINE CASEI/B BIRCH DOWEL I/B BALSA CENTER PROFILE I/B SHEET BALSA JSELAGE FORMERCHEEKS ATTACHEDI/B BALSA WITH 4-40 ALLENFORMERS Fl HEAD SCREWS 1/16 BALSA SIDESI/B PLY D FIREWALLNUTS 3/16SQUARE 4-40 BLIND-- I/B SHEET-- ----OF MOLPITSBALSAPROFILE-5\I PROF44-1 -1/2 RNE ENGINELANDING GEAR I/B PLYMOUNTS EPOXYWIRE TO FIREWALL LB BIRCH DOWEL--TO FIREWALLWITH THEEAD 1/16 BALSA SHEET FIREWALL3/4 WOOD SCREWAM EPOXY 030 ALUMINUMSPARS STAB PLATFORM BA I/B BALSA "\~FORMER 6SlEET CENTERBANTAM 19 IGMTION DOWELI/B PLY COIL i I/BBALSA - I/IA BALSABATTERIESSHEET ClERKS __ __ATTACH WITH FUSELAGE4-40 ALLEN HE - SIDES WS AUSTIN - TIMER 3/4 WOOD SCREW EPOXY TATONE D-TI/B BALSA SHEETI/B PINE ENGINE TIMERHATCH REMOVABLEMOUNTS TO 3/RI SQUARE BALSA STRINGERS STIFFENERSI/B PLY FIREWALLFIREWALL AND CROSS FECES 3/35 PIANO WIREBALSAWHE stall ignition engine Dimensions illustrated Bantam 19 may varied other Class engine Install high-tension coil condenser battery box place shown wire accordance ignition hook-up diagram course ignition engines hard come byunless lucky enough have hand own old days Ignition engines say nothing older glow engines long since collectors items quite ex pensive Fortunately SAM rules make allowance problem will read about installation TD 09 glow deeper article interest ing reflection glow engine half size ignition engine can develop power ignition engine double displacement ran gas oiland course dont have lug around ignition sys tem parts whiz starting cranky engine system Wing wing constructed 1/16 sheet balsa ribs t tip form ers alsa spars trailing edge three aminated balsa strips leading edge two pieces x es balsa laminated Apply glue tween laminations Lay pin lead ing edge plan accordance profile trailing edge glue three pieces alsa strips follow same procedure Shim up frontof trailing edge 1/32 Cut t wing tip formers glue place Cut ribs accordance templates shown glue insert leading trailing edge shown plan view wing After glue sets remove wing plan cut leading trailing edge glue polyhedral dimen sions shown Lay wing spars plan locations across top wing mark pencil notch ribs single edge razor blade accept spars After notch ing place glue spars place top bottom wing Cut templates plan polyhedral dihedral join ers t glue place Cover center wing section 1/16 balsa sheet fitted between center section ribs Trim sand wing carefully prepara tion covering Stabilizer The stabilizer constructed 3/16 sq balsa leading edge three aminated balsa strips trailing edge t balsa tips Place 3/16 sq leading edge place pinning plan view stabilizer Place pin glue three alsa strips trailing edge shown plans cut out glue sheet tip formers Glue x 3A balsa main spar place cut glue ribs 1/16 x 3A balsa After glue sets trim sand ribs accordance airfoil section elevator Finally place par bottom stabilizer notching ribs assembly necessary glue place Cut two tail skids July1976 45 AND RECESSED BETWEEN RIBS AND BOTTOM FRONT OF TRAILING EDGE 1/52 ALONG FULL SPAN BEFORE ASSEMBLING WING STRUCTURE AM K- UP LUG NPOINTS CONDENSER Pop-up tail linkage PP version Upon re lease dethermalizer cord Tatone timer tail assumes 45-degree angle OTing Details movable rudder elevators RC-Assist version Hole elevator clears rudder flipper up SAM rules require 09 Radio-Assist model Fox t contoured shown readi ness installation after covering Rudder Construct rudder 3/16 sq balsa leading edge t trailing edge cutting gluing plan view Next raise outline rudder 1/16 off plan packing Assemble glue Vs x 5/16 balsa main spar 1/16 x 5/16 ribs Bottom rib cut balsa sheet After glue has dried remove plan trim airfoil section sand final rudder configuration Covering wing tail covered Silkspan finished two coats dope entire fuselage covered silk including pylon resulting free form curvature shown photos Finish two coats dope After covering glue tail skids elevator bottom dethermalizer use Tatone timer stall hatch shown photograph brick receiver servo control placed smack-up against firewall shown shut-off down elevator control linked engine shut-off order avoid need third servo Elevator rudder linkages shown third servo can used engine shut-off inde pendently desired will note modem version Fox RC-Assist did use Mono kote covering wing tail surfaces rained silk covering fuselage found covering combination durable resisting damage Experienced free fightersand have already tried RC-Assist will know Fox adjusted flight just would normally prepare model configuration can use own favorite adjustments may neces sary point out newcomerwho may old free fighter toothat Fox does have flown continuously radio would sport flying can allow climb fast steeplylike contest-type free-flight model sport RC Radio-Assist can employed described Shut-off engine want retrieveand maybe savethe model threatens fly away Doing rare exciting experienceone would never guess much pleasure common sense could added time-honored free flight Nothing lost much added Bottom view ignition version free flight shows rubber band keeps tension DT line until release Adapting RC-Assist adapting Fox RC-Assist construct rudder elevator controls hinge parting lines added con struction hinges control linkage shown RC adaptation plan conform SAM rules TD 09 Cox engine mounted shown plans Due extra power five degrees down-thrust may required keep model stable during engine run addition engine mounted wood aluminum engine mounts cowling sides removable servicing Wood engine mounts shown draw ing Note 225 MA battery pack mounted under engine front firewall obtain proper balance original model EK-Logictrol LRB-3 46 Model Aviation
Edition: Model Aviation - 1976/07
Page Numbers: 42, 43, 44, 45, 46
Joe Beshar author original 1940 model left hand brand-new ignition-powered job right foreground model articlethe large elevator shows clearly Build contest winner yore either Old-Timer Free Flight Radio-Assist shut-off retrieval no longer have big flying site Close-up ignition-Bantdm free-flight ver sion shows Austin timer condenser points bottom Tatone timer dethermalizer FOX SHORTLY AFTER Academy Model Aeronautics decided publish Model Aviation decided submit article Radio-Assisted Old-Timer free flight encouraged editor stated understood sort thing close heart Putting mildly very close heart first really didnt know what offer things After considerable throught occurred perhaps Fox Class-A free flight model created back 1940 might interest modeling com munity old-time free flight since fine performer its day Radio-Assist enjoyable fly Sometime ago found original model stored mothers attic during years balsa wood dried out Silkspan covering cracked After finding model also fortunate finding original plans built replica original 42 model flew ignition-powered placing second SAMS Champs Lake hurst NJ 1974 also built RC ver sion am including article Since returning modeling circle 1964 have active radio control modeling basically due limited free-flight fields eastern US long thereafter realized free-flight modeler accepted reluc tance concept adding radio control free flight could understand feeling After too dyedin-the-wool free fighter RC added pleasant new dimension long after involvement Old-Timer free flight member Society Antique Modelers came realize order free flight survive area need method retrieve free-flight models order avoid loss SAM recognized RC-Assist event Old-Timer free flight opened new horizons modeling activities since enabled flying free-flight model out ordinary football field retriev ing before could fly away know free-flight models have dethermalizer timer engine shut off doesnt mean cant lose model does happen free fighters Radio Control-Assist functions can implemented addi tionally ability retrieve model flight now part system Further basic free flight characteristics pre served transmitter manipulated time bring aircraft back its take-off site RC-Assist movement pres ent time ruling can use transmitter during engine run shut engine off further control model during its soaring period personal TI-TI goal am confident will happen future rules state transmitter used shut engine off subsequently allowing model per form according its normal free flight characteristics use trans mitter case free flight activities event model caught thermal kind trouble modeler decides use radio control model moment uses transmitter control flight would considered over Please note personal goal feel would restore true free flight characteristics requiring skills trim such model would different would ability return model its launching point event trouble modeler saw fit control has honor president Society Antique Mod elers circle free flight activity ultimate aim obtain acceptance type ruling Further humble feeling free flight cluding modern free flight activity matter time type RC Assist will have employed order free flight survive reason areas just no free-flight fields modeler thing unless travels 50 100 miles out town can tricky enough theories Lets go Fox Initially will describe construction Fox original ignition-powered Class model follow supplements necessary adapt RC Assist presenting article manner will enable modeler apply principles RC-Assist oldtime modern free-flight model July1976 43 RC assist version cowl block removed show mounts shut-off linkage Note battery box under engine balancing Cox TD 09 required 5 degrees downthrust Bantam 19 Hatch removed ignition free-flight version shows location Austin timer battery box Under present SAM ruling AssistIn Radio-Assist version same compartment allowed plenty X-mitter can used shut-off soaringroom Logictrol LRB-3 brick Beshar used Covering model silk fuselaae Monokote wino tail Fuselage The fuselage constructed 3/16 sq balsa Build side view plans shown cover side structure 1/16 balsa sheet Next top view cut 3/16 cross members box bottom section fuselage together basic struc ture Now cut sheet balsa entire profile top base structure pylon firewall front rudder glued centerline top base structure fuselage Formers 1 2 3 cut out glued respective position formers 4 5 6 fill-in triangles cut glued center profile fuselage frame top Next cut pylon mount platform 1/s sheet balsa form shown top view Install plywood firewall Obtain 3/32 piano wire bend form shown drill 1/16 holes through firewall along form bent 3/32 piano wire thread landing gear firewall 654320 ENGLISH 1940 2 PECES I/B 1/2 BALSA LAMINATED 7 I/B H 1/4 BALSA I3/16 SQUARE BALSAI/B SHEET BALSA CENTER PROFLE - rzsgZ-ZWt GOLDBERG SHORTSYNOD CONTROL CONTROL HORNSTAIL SKID REMOVEDPUSH-RODS AND MINI-SNAPSFOR CLARITY S 3 PIECES - I/B SQUARE BALSA LAMINATED 4 3 ECES 1/8 SQUARE BALSA LAMINATED S 3/16 SQUARE BALSA STRINGERS AND CROSS PIECES R-C ASSIST RUDDER MODIFICATION THE FOX OLD TIMER FREE-FLIGIT WITH DETAILS FOR MODIFICATION TO RADIO CONTROL ASSIST DESIGNED BY JOE BESHAR SEPTEMBER 2 1940 DRAWN AND INKED BY BILL BOOTH JR I/B x 5/16 BALSAGOLDBERG NYLON HINGE-ANCHOR SPARMINI-SNAPS1/16 BALSA SHEET RIBS - U4V -- GOLDBERG SH~ CONTROL HORN E-K PLASTIC HINGES EPOXY IN PLACE R-C ASSIST STAB MODIFICATION FOR 1 1/16 BALSA SHEET --5/16 SHEET BALSA 3/16 BIRCH DOWEL EPOXY IN PLACE TAIL SKIDVUIUJt FUEL SHUT-OFF SYSTEMVIEW FROM THE BOTTOM CABLE TINNED WITH f- ITH HATCH REMOVEDII SOLDER FOR STIFFNESSrSEf-SHOWING ECTIONSNIII ElIII AFTER BENDING , -- 3A6 TO FUEL nTE-K LRB-3TO ELEVATOR INAs2 SERVO TO RUDDER I/I6 LOCATION OF 5/16 I/B HINGEANCHOR SPAR FOR R-C ELEVATOR PERFECTRADIO ARRANGEMENT AND FUEL INSTALLATION FUEL SHUT-OFFTANK SEE DETAIL /II ATTACH WITH SERVO TAPE _____ITOOG___________ MOOFY 2 PINE MOUNTS TOFIT-______ - I/B 1:E-K LRB-3GOLDBERG 1BJK3 2 SERVOMINI- SNAPS QQW&kIaJSIBRICK SCREW EYE 225 MA BATTERY PACK\ RUBBER BANDGOLD-N-RODI/B BALSA HATCH BRAIDED CABLE PUSH ROD -- FUSELAGE SIDES AND CHEEKS -REMOVED FOR CLARITY PLYWOOD NYROD PUSH RODS BIRCH DOWEL 1/16 BALSA SHEET F - - 14 5 - zz 1 2 i RUDDER IIR OVER CENTER II Ii- a71 RIB I/B BALSA TOP AND BOTTOM SQUARE BALSA TOP AND BOTTOM 6 DINBORAL 3 1-1/4 1A6 SHEET BALSA - FUSELAGE SIDES IGNITION BATTERIES TEI Mfl CON NE C 1/6 BALSA SHEET CENTER PROFILE 1/8 BIRCH DOWEL 7030 ALUMINUM STAB PLATFORM BALSA 040 PIANOI/B HOOKS NOTCH 21 I/Il LA 3/16 SQUARE -- BALSA 1/16 00 ALUMINUM NG TOP I/B BALSA3/16030 ALUM NUM SHEETISQUARE STAB P ATFORM BALSA 1/6 5/16 BALSA 1/16 BALSA SHEET RIBS 030 ALUMINUM TRIM TABAI/B BALSA6 SHEET I/B BALSA SHEETO B BRCH DOWEL 1/16 00 ALUMINUM TUBINGI/B BALSA -SHEET TAIL SKIDS 040 PIANO WIRE HOOKS 44 Model Aviation 012345 IS through holes heavy sewing thread epoxy position motor mounts made epoxied wood screwed firewall shown plan Cut out form 1 diam eter wheel balsa epoxy dowel through center wheel Drill 3/32 hole axle assem w 9 I0 195 B 13 14 TIPS 1212 EACH DIHEDRAL BRACES CENTER 121I EACH w ble wheel landing gear soldered washers Make removable hatch between firewall station 4 a sheet Position dowels shown limits hatch depth holds hatch place rubber bands Cut out install Austin timer ignition location shown InczhZZZL II 10 9 -B 7 6 5 4 3 2 ALL RIBS 1/16 BALSA SlEET NOTCH FOR SPORS WHILE ASSEMBLING CUT ONE AND TWO EACH -I4 PYLON FORMERSI/B BALSA WING PLATFORM p TO ENGINE CASEI/B BIRCH DOWEL I/B BALSA CENTER PROFILE I/B SHEET BALSA JSELAGE FORMERCHEEKS ATTACHEDI/B BALSA WITH 4-40 ALLENFORMERS Fl HEAD SCREWS 1/16 BALSA SIDESI/B PLY D FIREWALLNUTS 3/16SQUARE 4-40 BLIND-- I/B SHEET-- ----OF MOLPITSBALSAPROFILE-5\I PROF44-1 -1/2 RNE ENGINELANDING GEAR I/B PLYMOUNTS EPOXYWIRE TO FIREWALL LB BIRCH DOWEL--TO FIREWALLWITH THEEAD 1/16 BALSA SHEET FIREWALL3/4 WOOD SCREWAM EPOXY 030 ALUMINUMSPARS STAB PLATFORM BA I/B BALSA "\~FORMER 6SlEET CENTERBANTAM 19 IGMTION DOWELI/B PLY COIL i I/BBALSA - I/IA BALSABATTERIESSHEET ClERKS __ __ATTACH WITH FUSELAGE4-40 ALLEN HE - SIDES WS AUSTIN - TIMER 3/4 WOOD SCREW EPOXY TATONE D-TI/B BALSA SHEETI/B PINE ENGINE TIMERHATCH REMOVABLEMOUNTS TO 3/RI SQUARE BALSA STRINGERS STIFFENERSI/B PLY FIREWALLFIREWALL AND CROSS FECES 3/35 PIANO WIREBALSAWHE stall ignition engine Dimensions illustrated Bantam 19 may varied other Class engine Install high-tension coil condenser battery box place shown wire accordance ignition hook-up diagram course ignition engines hard come byunless lucky enough have hand own old days Ignition engines say nothing older glow engines long since collectors items quite ex pensive Fortunately SAM rules make allowance problem will read about installation TD 09 glow deeper article interest ing reflection glow engine half size ignition engine can develop power ignition engine double displacement ran gas oiland course dont have lug around ignition sys tem parts whiz starting cranky engine system Wing wing constructed 1/16 sheet balsa ribs t tip form ers alsa spars trailing edge three aminated balsa strips leading edge two pieces x es balsa laminated Apply glue tween laminations Lay pin lead ing edge plan accordance profile trailing edge glue three pieces alsa strips follow same procedure Shim up frontof trailing edge 1/32 Cut t wing tip formers glue place Cut ribs accordance templates shown glue insert leading trailing edge shown plan view wing After glue sets remove wing plan cut leading trailing edge glue polyhedral dimen sions shown Lay wing spars plan locations across top wing mark pencil notch ribs single edge razor blade accept spars After notch ing place glue spars place top bottom wing Cut templates plan polyhedral dihedral join ers t glue place Cover center wing section 1/16 balsa sheet fitted between center section ribs Trim sand wing carefully prepara tion covering Stabilizer The stabilizer constructed 3/16 sq balsa leading edge three aminated balsa strips trailing edge t balsa tips Place 3/16 sq leading edge place pinning plan view stabilizer Place pin glue three alsa strips trailing edge shown plans cut out glue sheet tip formers Glue x 3A balsa main spar place cut glue ribs 1/16 x 3A balsa After glue sets trim sand ribs accordance airfoil section elevator Finally place par bottom stabilizer notching ribs assembly necessary glue place Cut two tail skids July1976 45 AND RECESSED BETWEEN RIBS AND BOTTOM FRONT OF TRAILING EDGE 1/52 ALONG FULL SPAN BEFORE ASSEMBLING WING STRUCTURE AM K- UP LUG NPOINTS CONDENSER Pop-up tail linkage PP version Upon re lease dethermalizer cord Tatone timer tail assumes 45-degree angle OTing Details movable rudder elevators RC-Assist version Hole elevator clears rudder flipper up SAM rules require 09 Radio-Assist model Fox t contoured shown readi ness installation after covering Rudder Construct rudder 3/16 sq balsa leading edge t trailing edge cutting gluing plan view Next raise outline rudder 1/16 off plan packing Assemble glue Vs x 5/16 balsa main spar 1/16 x 5/16 ribs Bottom rib cut balsa sheet After glue has dried remove plan trim airfoil section sand final rudder configuration Covering wing tail covered Silkspan finished two coats dope entire fuselage covered silk including pylon resulting free form curvature shown photos Finish two coats dope After covering glue tail skids elevator bottom dethermalizer use Tatone timer stall hatch shown photograph brick receiver servo control placed smack-up against firewall shown shut-off down elevator control linked engine shut-off order avoid need third servo Elevator rudder linkages shown third servo can used engine shut-off inde pendently desired will note modem version Fox RC-Assist did use Mono kote covering wing tail surfaces rained silk covering fuselage found covering combination durable resisting damage Experienced free fightersand have already tried RC-Assist will know Fox adjusted flight just would normally prepare model configuration can use own favorite adjustments may neces sary point out newcomerwho may old free fighter toothat Fox does have flown continuously radio would sport flying can allow climb fast steeplylike contest-type free-flight model sport RC Radio-Assist can employed described Shut-off engine want retrieveand maybe savethe model threatens fly away Doing rare exciting experienceone would never guess much pleasure common sense could added time-honored free flight Nothing lost much added Bottom view ignition version free flight shows rubber band keeps tension DT line until release Adapting RC-Assist adapting Fox RC-Assist construct rudder elevator controls hinge parting lines added con struction hinges control linkage shown RC adaptation plan conform SAM rules TD 09 Cox engine mounted shown plans Due extra power five degrees down-thrust may required keep model stable during engine run addition engine mounted wood aluminum engine mounts cowling sides removable servicing Wood engine mounts shown draw ing Note 225 MA battery pack mounted under engine front firewall obtain proper balance original model EK-Logictrol LRB-3 46 Model Aviation
Edition: Model Aviation - 1976/07
Page Numbers: 42, 43, 44, 45, 46
Joe Beshar author original 1940 model left hand brand-new ignition-powered job right foreground model articlethe large elevator shows clearly Build contest winner yore either Old-Timer Free Flight Radio-Assist shut-off retrieval no longer have big flying site Close-up ignition-Bantdm free-flight ver sion shows Austin timer condenser points bottom Tatone timer dethermalizer FOX SHORTLY AFTER Academy Model Aeronautics decided publish Model Aviation decided submit article Radio-Assisted Old-Timer free flight encouraged editor stated understood sort thing close heart Putting mildly very close heart first really didnt know what offer things After considerable throught occurred perhaps Fox Class-A free flight model created back 1940 might interest modeling com munity old-time free flight since fine performer its day Radio-Assist enjoyable fly Sometime ago found original model stored mothers attic during years balsa wood dried out Silkspan covering cracked After finding model also fortunate finding original plans built replica original 42 model flew ignition-powered placing second SAMS Champs Lake hurst NJ 1974 also built RC ver sion am including article Since returning modeling circle 1964 have active radio control modeling basically due limited free-flight fields eastern US long thereafter realized free-flight modeler accepted reluc tance concept adding radio control free flight could understand feeling After too dyedin-the-wool free fighter RC added pleasant new dimension long after involvement Old-Timer free flight member Society Antique Modelers came realize order free flight survive area need method retrieve free-flight models order avoid loss SAM recognized RC-Assist event Old-Timer free flight opened new horizons modeling activities since enabled flying free-flight model out ordinary football field retriev ing before could fly away know free-flight models have dethermalizer timer engine shut off doesnt mean cant lose model does happen free fighters Radio Control-Assist functions can implemented addi tionally ability retrieve model flight now part system Further basic free flight characteristics pre served transmitter manipulated time bring aircraft back its take-off site RC-Assist movement pres ent time ruling can use transmitter during engine run shut engine off further control model during its soaring period personal TI-TI goal am confident will happen future rules state transmitter used shut engine off subsequently allowing model per form according its normal free flight characteristics use trans mitter case free flight activities event model caught thermal kind trouble modeler decides use radio control model moment uses transmitter control flight would considered over Please note personal goal feel would restore true free flight characteristics requiring skills trim such model would different would ability return model its launching point event trouble modeler saw fit control has honor president Society Antique Mod elers circle free flight activity ultimate aim obtain acceptance type ruling Further humble feeling free flight cluding modern free flight activity matter time type RC Assist will have employed order free flight survive reason areas just no free-flight fields modeler thing unless travels 50 100 miles out town can tricky enough theories Lets go Fox Initially will describe construction Fox original ignition-powered Class model follow supplements necessary adapt RC Assist presenting article manner will enable modeler apply principles RC-Assist oldtime modern free-flight model July1976 43 RC assist version cowl block removed show mounts shut-off linkage Note battery box under engine balancing Cox TD 09 required 5 degrees downthrust Bantam 19 Hatch removed ignition free-flight version shows location Austin timer battery box Under present SAM ruling AssistIn Radio-Assist version same compartment allowed plenty X-mitter can used shut-off soaringroom Logictrol LRB-3 brick Beshar used Covering model silk fuselaae Monokote wino tail Fuselage The fuselage constructed 3/16 sq balsa Build side view plans shown cover side structure 1/16 balsa sheet Next top view cut 3/16 cross members box bottom section fuselage together basic struc ture Now cut sheet balsa entire profile top base structure pylon firewall front rudder glued centerline top base structure fuselage Formers 1 2 3 cut out glued respective position formers 4 5 6 fill-in triangles cut glued center profile fuselage frame top Next cut pylon mount platform 1/s sheet balsa form shown top view Install plywood firewall Obtain 3/32 piano wire bend form shown drill 1/16 holes through firewall along form bent 3/32 piano wire thread landing gear firewall 654320 ENGLISH 1940 2 PECES I/B 1/2 BALSA LAMINATED 7 I/B H 1/4 BALSA I3/16 SQUARE BALSAI/B SHEET BALSA CENTER PROFLE - rzsgZ-ZWt GOLDBERG SHORTSYNOD CONTROL CONTROL HORNSTAIL SKID REMOVEDPUSH-RODS AND MINI-SNAPSFOR CLARITY S 3 PIECES - I/B SQUARE BALSA LAMINATED 4 3 ECES 1/8 SQUARE BALSA LAMINATED S 3/16 SQUARE BALSA STRINGERS AND CROSS PIECES R-C ASSIST RUDDER MODIFICATION THE FOX OLD TIMER FREE-FLIGIT WITH DETAILS FOR MODIFICATION TO RADIO CONTROL ASSIST DESIGNED BY JOE BESHAR SEPTEMBER 2 1940 DRAWN AND INKED BY BILL BOOTH JR I/B x 5/16 BALSAGOLDBERG NYLON HINGE-ANCHOR SPARMINI-SNAPS1/16 BALSA SHEET RIBS - U4V -- GOLDBERG SH~ CONTROL HORN E-K PLASTIC HINGES EPOXY IN PLACE R-C ASSIST STAB MODIFICATION FOR 1 1/16 BALSA SHEET --5/16 SHEET BALSA 3/16 BIRCH DOWEL EPOXY IN PLACE TAIL SKIDVUIUJt FUEL SHUT-OFF SYSTEMVIEW FROM THE BOTTOM CABLE TINNED WITH f- ITH HATCH REMOVEDII SOLDER FOR STIFFNESSrSEf-SHOWING ECTIONSNIII ElIII AFTER BENDING , -- 3A6 TO FUEL nTE-K LRB-3TO ELEVATOR INAs2 SERVO TO RUDDER I/I6 LOCATION OF 5/16 I/B HINGEANCHOR SPAR FOR R-C ELEVATOR PERFECTRADIO ARRANGEMENT AND FUEL INSTALLATION FUEL SHUT-OFFTANK SEE DETAIL /II ATTACH WITH SERVO TAPE _____ITOOG___________ MOOFY 2 PINE MOUNTS TOFIT-______ - I/B 1:E-K LRB-3GOLDBERG 1BJK3 2 SERVOMINI- SNAPS QQW&kIaJSIBRICK SCREW EYE 225 MA BATTERY PACK\ RUBBER BANDGOLD-N-RODI/B BALSA HATCH BRAIDED CABLE PUSH ROD -- FUSELAGE SIDES AND CHEEKS -REMOVED FOR CLARITY PLYWOOD NYROD PUSH RODS BIRCH DOWEL 1/16 BALSA SHEET F - - 14 5 - zz 1 2 i RUDDER IIR OVER CENTER II Ii- a71 RIB I/B BALSA TOP AND BOTTOM SQUARE BALSA TOP AND BOTTOM 6 DINBORAL 3 1-1/4 1A6 SHEET BALSA - FUSELAGE SIDES IGNITION BATTERIES TEI Mfl CON NE C 1/6 BALSA SHEET CENTER PROFILE 1/8 BIRCH DOWEL 7030 ALUMINUM STAB PLATFORM BALSA 040 PIANOI/B HOOKS NOTCH 21 I/Il LA 3/16 SQUARE -- BALSA 1/16 00 ALUMINUM NG TOP I/B BALSA3/16030 ALUM NUM SHEETISQUARE STAB P ATFORM BALSA 1/6 5/16 BALSA 1/16 BALSA SHEET RIBS 030 ALUMINUM TRIM TABAI/B BALSA6 SHEET I/B BALSA SHEETO B BRCH DOWEL 1/16 00 ALUMINUM TUBINGI/B BALSA -SHEET TAIL SKIDS 040 PIANO WIRE HOOKS 44 Model Aviation 012345 IS through holes heavy sewing thread epoxy position motor mounts made epoxied wood screwed firewall shown plan Cut out form 1 diam eter wheel balsa epoxy dowel through center wheel Drill 3/32 hole axle assem w 9 I0 195 B 13 14 TIPS 1212 EACH DIHEDRAL BRACES CENTER 121I EACH w ble wheel landing gear soldered washers Make removable hatch between firewall station 4 a sheet Position dowels shown limits hatch depth holds hatch place rubber bands Cut out install Austin timer ignition location shown InczhZZZL II 10 9 -B 7 6 5 4 3 2 ALL RIBS 1/16 BALSA SlEET NOTCH FOR SPORS WHILE ASSEMBLING CUT ONE AND TWO EACH -I4 PYLON FORMERSI/B BALSA WING PLATFORM p TO ENGINE CASEI/B BIRCH DOWEL I/B BALSA CENTER PROFILE I/B SHEET BALSA JSELAGE FORMERCHEEKS ATTACHEDI/B BALSA WITH 4-40 ALLENFORMERS Fl HEAD SCREWS 1/16 BALSA SIDESI/B PLY D FIREWALLNUTS 3/16SQUARE 4-40 BLIND-- I/B SHEET-- ----OF MOLPITSBALSAPROFILE-5\I PROF44-1 -1/2 RNE ENGINELANDING GEAR I/B PLYMOUNTS EPOXYWIRE TO FIREWALL LB BIRCH DOWEL--TO FIREWALLWITH THEEAD 1/16 BALSA SHEET FIREWALL3/4 WOOD SCREWAM EPOXY 030 ALUMINUMSPARS STAB PLATFORM BA I/B BALSA "\~FORMER 6SlEET CENTERBANTAM 19 IGMTION DOWELI/B PLY COIL i I/BBALSA - I/IA BALSABATTERIESSHEET ClERKS __ __ATTACH WITH FUSELAGE4-40 ALLEN HE - SIDES WS AUSTIN - TIMER 3/4 WOOD SCREW EPOXY TATONE D-TI/B BALSA SHEETI/B PINE ENGINE TIMERHATCH REMOVABLEMOUNTS TO 3/RI SQUARE BALSA STRINGERS STIFFENERSI/B PLY FIREWALLFIREWALL AND CROSS FECES 3/35 PIANO WIREBALSAWHE stall ignition engine Dimensions illustrated Bantam 19 may varied other Class engine Install high-tension coil condenser battery box place shown wire accordance ignition hook-up diagram course ignition engines hard come byunless lucky enough have hand own old days Ignition engines say nothing older glow engines long since collectors items quite ex pensive Fortunately SAM rules make allowance problem will read about installation TD 09 glow deeper article interest ing reflection glow engine half size ignition engine can develop power ignition engine double displacement ran gas oiland course dont have lug around ignition sys tem parts whiz starting cranky engine system Wing wing constructed 1/16 sheet balsa ribs t tip form ers alsa spars trailing edge three aminated balsa strips leading edge two pieces x es balsa laminated Apply glue tween laminations Lay pin lead ing edge plan accordance profile trailing edge glue three pieces alsa strips follow same procedure Shim up frontof trailing edge 1/32 Cut t wing tip formers glue place Cut ribs accordance templates shown glue insert leading trailing edge shown plan view wing After glue sets remove wing plan cut leading trailing edge glue polyhedral dimen sions shown Lay wing spars plan locations across top wing mark pencil notch ribs single edge razor blade accept spars After notch ing place glue spars place top bottom wing Cut templates plan polyhedral dihedral join ers t glue place Cover center wing section 1/16 balsa sheet fitted between center section ribs Trim sand wing carefully prepara tion covering Stabilizer The stabilizer constructed 3/16 sq balsa leading edge three aminated balsa strips trailing edge t balsa tips Place 3/16 sq leading edge place pinning plan view stabilizer Place pin glue three alsa strips trailing edge shown plans cut out glue sheet tip formers Glue x 3A balsa main spar place cut glue ribs 1/16 x 3A balsa After glue sets trim sand ribs accordance airfoil section elevator Finally place par bottom stabilizer notching ribs assembly necessary glue place Cut two tail skids July1976 45 AND RECESSED BETWEEN RIBS AND BOTTOM FRONT OF TRAILING EDGE 1/52 ALONG FULL SPAN BEFORE ASSEMBLING WING STRUCTURE AM K- UP LUG NPOINTS CONDENSER Pop-up tail linkage PP version Upon re lease dethermalizer cord Tatone timer tail assumes 45-degree angle OTing Details movable rudder elevators RC-Assist version Hole elevator clears rudder flipper up SAM rules require 09 Radio-Assist model Fox t contoured shown readi ness installation after covering Rudder Construct rudder 3/16 sq balsa leading edge t trailing edge cutting gluing plan view Next raise outline rudder 1/16 off plan packing Assemble glue Vs x 5/16 balsa main spar 1/16 x 5/16 ribs Bottom rib cut balsa sheet After glue has dried remove plan trim airfoil section sand final rudder configuration Covering wing tail covered Silkspan finished two coats dope entire fuselage covered silk including pylon resulting free form curvature shown photos Finish two coats dope After covering glue tail skids elevator bottom dethermalizer use Tatone timer stall hatch shown photograph brick receiver servo control placed smack-up against firewall shown shut-off down elevator control linked engine shut-off order avoid need third servo Elevator rudder linkages shown third servo can used engine shut-off inde pendently desired will note modem version Fox RC-Assist did use Mono kote covering wing tail surfaces rained silk covering fuselage found covering combination durable resisting damage Experienced free fightersand have already tried RC-Assist will know Fox adjusted flight just would normally prepare model configuration can use own favorite adjustments may neces sary point out newcomerwho may old free fighter toothat Fox does have flown continuously radio would sport flying can allow climb fast steeplylike contest-type free-flight model sport RC Radio-Assist can employed described Shut-off engine want retrieveand maybe savethe model threatens fly away Doing rare exciting experienceone would never guess much pleasure common sense could added time-honored free flight Nothing lost much added Bottom view ignition version free flight shows rubber band keeps tension DT line until release Adapting RC-Assist adapting Fox RC-Assist construct rudder elevator controls hinge parting lines added con struction hinges control linkage shown RC adaptation plan conform SAM rules TD 09 Cox engine mounted shown plans Due extra power five degrees down-thrust may required keep model stable during engine run addition engine mounted wood aluminum engine mounts cowling sides removable servicing Wood engine mounts shown draw ing Note 225 MA battery pack mounted under engine front firewall obtain proper balance original model EK-Logictrol LRB-3 46 Model Aviation