C SCALE Bob & Dolly Wischer FINISH all-metal prototypes silk dope finish method described last month may produce longest lasting toughest surface models expected have long life collection Fleet Trainer 37 years old finished nitrate dope Eme raude nine years butyrate dope shows few blemishes Some flaws appeared due use balsa substrate too soft weight-saving reasons tiny warps really stand out glossy surface Careful selection balsa would avoid problems have heard said butyrate dope continues shrink throughout its life have found true simulate surface all-metal proto type probably nothing realistic durable easy apply fiberglass cloth polyester resin Lightweight fiberglass cloth weighs e per square yard Finishing resin applied properly adds minimal weight affording maximum strength toughness Preparation structure sanding smooth progressively finer grades sandpaper same silk covering Dope used forming base covering because have found polyester resin will cure applied over dope Fiberglass cloth laid dry over surface covered finishing resin such supplied Sig K&B applied through cloth using short-haired rather stiffly-bristled brush Resin intended boats orforpatching rust spots cars suited purpose very difficult sand builds weight rapidly being too thick apply lightly Finishing resin can brushed out minimum layer quantity applied appears too wet can removed before setting up absorbent tissue However have found very little resin can removed tissue rubbing down seems good means bringing cloth close contact balsa surface An alternate method removal sanding after ward requiring additional time effort Fiberglass cloth very easy apply forms willingly around complex com pound curves After curing cloth resin sanded lightly special sandpapers will minimize effort such open-coat silicon carbide 180 320 grit intended wet-or-dry sanding painted sur faces point cloth weave remains evident now need fill weave metal-like surface resin would accomplish purpose added weight sanding choice shorter method Adding resin builds weight rapidly because nothing evaporates unlike dope material stays plane Filling done brushing spraying lacquer primer such Ditzler Primer 32 light gray color can obtained auto paint supply store After sanding relatively easy task weave still evident another prime coat required examine surface closely magnifying glass determine whether weave truly filled amount sanding will make difference final weight plane primer heavy can sanded way down cloth minimum weight can given light sanding first 180 grit paper followed 320 will leave polished scratch-free surface Ditsler Primer extremely thick needs thinned use dope thinner two parts primer three parts thinner spraying Simulation panel lines surface model easily accomplished using masking tape unthinned primer Tape laid along line desired generous coating primer brushed along edge can sanded down tape line using same two grades paper feathered out surrounding area Remove tape realistic panel line appears Use thicker tape two layers deeper lines Intersecting lines require careful sanding avoid removal previously built-up lines An ideal tape purpose leaves sharp lines Karoden Flex-Mask hobby shop will make curved lines represent edges fillet outlines quite difficult obtain standard masking tapes Any popular model finishing materials can applied over Ditzler Primer including dope have used Floquil model railroad paint flat finish simulate camouflage Its ad vantage covers very large areas small amounts material minimum weight covers extremely well coat colors bleed Adhesion good test panel treated raw fuel seemed unaffected except slight change gloss due oil residue Five six fluid ounces will cover sixfoot model scale flight realism Letters continue arrive controversial subject Vince Risovi have reading some what detached interest discussion Model Aviation other publications continuing saga realism flight judge recently published excerpt Dale Johnson scale speed has prompted entry 24 Model Aviation scene popular campground famous Kitchener-Waterloo Scale Rally Plenty space despite large numbers campers Note clipped grass two scale models Kitchener-Waterloo Scale Rally held Ontario Canada portion huge throng spectators participants attendance 79 event postal roundtable As hardheaded Virginians Dale unable convert test scale speed feel strong sense deja vu provide again few thoughts whats wrong Dales idea full-scale plane modelwhen spaced distances observer would make appear same sizeshould basically appear track along together same speed problem stems increasing field view human eye increasing ranges viewers perception speed largely matter quickly object traverses range field view perception speed specifi cally ajudge what dealing isnt Since field view increases increas ing range far away objects full-scale plane always seem moving slower nearby objects model speed As drive down highway example notice quickly telephone poles located near road seem moving Yet identically-spaced poles farther away seem almost stand still Both sets poles moving same speed near ones model Dales analogy seem going faster stand close Interstate dare get sense fast cars going However get back few hundred feet hardly seem moving Both however going same actual scale speed Dales proposal neither academically sound nor prac tically workable final word scale speed may before moving new ground attempt ing achieve realism reduced scale talking about dynamic modeling literature dynamic modeling exemplified Brad Continued page 109 ay jennings os Lounsy Rntrim Northern Ireland displays model Rutan Quickie reports flying characteristics model now excellent CG located shown Walter Wirths letter August1978 issue Mode/Aviation Model has balsa fuselage foam wings Enya 45 power Its 48-in wingspan makes just slightly less quarter scale October 198025 1/4-TURN LATCH THE PERFECT WAY TO LATCH YOUR HATCHI OR YOUR COWL CANOPY INSPECTION COVERETC SIMPLE TO LINE UP AND INSTALL PERFECT ALIGNMENT EVERY TIME YOSURFACE AND CAN BE PAINTED THE COLOR THIS IS ALL YOU SEE THE HEAD FITS FLUSH WITH OF YOUR MODEL THEY LOOK AND WORK JUST LIKE THE REAL THING THE SPRING-LOADED MECHANISM POSITIVELY LOCKS OR RELEASES WITH MERE 1/ TURN OF SCREWDRIVER AL SIZE IS ONLY % x 1/GUI - ALL STEEL ASSEMBLY REQUIRED BRASS MACHINED PARTS 2 SETS FOR PERFECT FOR PLANES BOATS CARS AND HELICOPTERS 0 242 DU-BRO PRODUCTS INCORPORATED 480 Banner Road Wauconda IllInoIs 60084 U S Some examples Belier rotor head linkages will given next month See way have new ham radio callN4DFH no gear Ill have build super radio helicopter ala George Myers Ace Silver Seven Nice 4 Dave Eying Helicopters Dave Chesney Rt 9 Box 62 IA Greensboro NC 27409 RC Scale/Wischers Continued page 25 Powers recent articles MA relatively complete being tried true tool engineer Just other parameters model simply full-scale value divided scale factor weight area horsepower name few neither scale speed has go literature apply However since arent using radar timing traps like accurately measure scale speed such precision calculation measurement unnecessary What required workable approach determination flight realism scale speed however measured being factor have victimin scale modeling pursuits along East Coastof two miscon ceptions largely product ruminations John Preston have lot respect 1 flight realism consists scale speed 2 realistic speed slow last years Bealeton Scale Meet let hasten say well run complete pleasure placed third Sport Scale Byron Pitts flown plane fairly putt-putted around sky being marginal edge underpowered no vertical perform ance loops small rolls slow judges following guidance slow good slower gooder felt plane flying excellent scale speed However astonished during full-scale airshow followed meet Pitts Special tore up sky its blazing speed seemingly un limited vertical capability crisp maneuvers agreed surprise model Pitts too slow never thought Id ever hear Youve hit nail head coin phrase answer judge flight realism whole range factors overall speed being just factors Heres start few items might include some future guide flight realism judging Does model use throttle flight control No aircraft Im aware completes loop full throttle runs wide open through out entire flight 2 Are maneuvers chosen appropriate aircraft modeled Ever see scale business aircraft execute loop option scored Ever see model P-5 1 make inverted pass deck real couldnt wouldnt have done could realistic model like manner aerobatically capable subject flown through four different names straight level flight such strafing run missed approach overshoot etc must also downgraded realism 3 Are maneuvers properly chosen executed realistic manner Ive seen scale P-39 execute axial roll little its fuselage length get high marks Ive seen retracts get 9 10 score total retractextend cycle lasted no longer blink Realistic 4 entire flight realistic just chosen maneuvers plane retract gear Add $2 shipping N Y State residents add tax Dealer inquiries invited Name jAddress _____________ AptI ICityStateZip I0 Master Charge C Visa El Expiration DateI ICard NoI C Check enclosed $I SignatureI October 1980 109 WORLD WAR II Build 5 Profile Aircraft ENTERPRISE book 11 14 contains 8 E Atchiaon 3 different color schemes aircraft construction views dena CA 91104 full size templets Just trace cut shape glue paint youre$650 Shiepins cal Res ready goadd sales tax Schiuter Elastic motor mounts designed reduce high frequency engine vibrations Install Heli Boy 2minutes Final Connection Available nowa ball joint designed withstand hardest muse abuse Rugged Construction Dragless Push rod depth visually determined Applicable types aircraft cars boats Available quantity balls#058NT Update helicopter sensational ball lonts Izi -I See dealer order direct *0 4tct9$49#o 2594 North Orange Blossom Trail ndo Florida 32804 305-422-1531 305-647-1355 down entire flight whether retracts option cannot judged highly realistic model flown Pattern-style split-S turn arounds end pass realistic plane pilot stands behind runway caller holds full throttle lets go banzai charge security altitude representation anything Ive seen airports Presumably hand vertical fin represents hand God protects aviators cant fly conventional gear 5 Does aircraft react its environment plane gets blown around wind should downgraded simply because does 747 also gets blown around wind rock-steady platform some judges seem demand models theres low ceiling low visibility model operated pilot actually derriere seatthat carefully close 1 suppose could go reams paper flight realism think share some common opinions may singing choir Let close however recommending Scale judges make point watch some fullscale aircraft doing thing small strips airshows fly-ins commercial airports would go long way toward evaluating Scale model way approximates fullscale counterpart nothing should dictate rules something should encourage part general program ofjudging improve ment Some points mentioned Vinces letter now covered newly-approved RC Scale Flight Judging Guide appears 1980-81 AMA rule book guide almost entirely work John Preston men tioned letter Airspeed pointed out 50 items guide briefly noted part Realism Flight realism being stressed important pars everything done during flight becoming key attainment high scores Scale competition Bob Dolly Wiseher Rr 1 S-221 Lapham Peak Road Delafield WI 53018 RC Soaring/Pruss Continued page 27 Rawdon conveying club news also includes excellent technical articles club boasts R&D department keeps busy tn past club has claimed national winners world record holder US F3B team member Hints likes Rich Pearson Chris Adams LSF V Barbara Henon Jerry Krainock Terry Koplan have provided enough winning secrets leave no excuses didnt take home marblesunless competing against now world-famous Gossamer Condor Gossamer Albatross two SFVSF members directly involved project level Blame Rawdon Bill Watson So want read about L/D trials cross-country desert dash upcoming Second World Cup twometer sailplanes subscribe Silent F/per Billy Forrey Editor 487 Mesa Road Santa Monica CA 90402 Check him rates third newsletter comes South Bay Soaring Society Tully Simoni president too called Silent Flyer like other two newsletters usually includes photographs some thing different sailplanes current issue besides technical articles covers RCM trophy Race told would lead-in sponsored R/C Modeler photos include some interesting concepts sailplane design designers include some gentlemen Great Britain Well considered gentle men until took race seriously annual classic 27 fliers site wind made racers weekend Four rounds eight heats flown Saturday end day four-way tie existed among Jerry Krainock Gerrard brothers EnglandRichard Paul Brian Irvine Tony Baker Solent Sailplanes showed /3scale ASW-I 7 weighed 26 pounds Wing span 22 feet weather racing racing did wind calmed Sunday evening Brian Irvine took home RCM Trophy Paul Gerrard went back England proud second place Ed Holder owner slope home-court advantage took third Its South Bay Soaring Societys Silent Flyer Contact Joan Irvine Editor South Bay Soaring Society Box 2012 Sunnyvale CA 94087 So feel 10-minute maxes spot landings have put flying rut check above-mentioned catalogs subscribe exchange club newsletters ones mentioned Youre guaranteed new horizons soaring Delayed flash department Craig Foxgord California member Pacific Soaring Society became 14th member League Silent Flight reach Level V Congratulations Dan Pruss RR 2 Box 490 Plainfield IL 60544 110 Model Aviation SOUTHERNS SORGHUM & FLEXALL THE STANDARDPLASTICIZER CONTACTFOR ADHESIVEACRYLICS FORAND SHEETINGDOPES FOAM WINGS WILL NOTSTOPS ATTACKCRACKING STYROFOAMAND CORES ICHIPPING DAVE BROWN PRODUCTS 8634 HUDDLESTON CINCINNATI OHIO 45236 AREA CODE 1513 791 0744 SEE YOUR DEALER OR DISTRIBUTOR
Edition: Model Aviation - 1980/10
Page Numbers: 24, 25, 109, 110
C SCALE Bob & Dolly Wischer FINISH all-metal prototypes silk dope finish method described last month may produce longest lasting toughest surface models expected have long life collection Fleet Trainer 37 years old finished nitrate dope Eme raude nine years butyrate dope shows few blemishes Some flaws appeared due use balsa substrate too soft weight-saving reasons tiny warps really stand out glossy surface Careful selection balsa would avoid problems have heard said butyrate dope continues shrink throughout its life have found true simulate surface all-metal proto type probably nothing realistic durable easy apply fiberglass cloth polyester resin Lightweight fiberglass cloth weighs e per square yard Finishing resin applied properly adds minimal weight affording maximum strength toughness Preparation structure sanding smooth progressively finer grades sandpaper same silk covering Dope used forming base covering because have found polyester resin will cure applied over dope Fiberglass cloth laid dry over surface covered finishing resin such supplied Sig K&B applied through cloth using short-haired rather stiffly-bristled brush Resin intended boats orforpatching rust spots cars suited purpose very difficult sand builds weight rapidly being too thick apply lightly Finishing resin can brushed out minimum layer quantity applied appears too wet can removed before setting up absorbent tissue However have found very little resin can removed tissue rubbing down seems good means bringing cloth close contact balsa surface An alternate method removal sanding after ward requiring additional time effort Fiberglass cloth very easy apply forms willingly around complex com pound curves After curing cloth resin sanded lightly special sandpapers will minimize effort such open-coat silicon carbide 180 320 grit intended wet-or-dry sanding painted sur faces point cloth weave remains evident now need fill weave metal-like surface resin would accomplish purpose added weight sanding choice shorter method Adding resin builds weight rapidly because nothing evaporates unlike dope material stays plane Filling done brushing spraying lacquer primer such Ditzler Primer 32 light gray color can obtained auto paint supply store After sanding relatively easy task weave still evident another prime coat required examine surface closely magnifying glass determine whether weave truly filled amount sanding will make difference final weight plane primer heavy can sanded way down cloth minimum weight can given light sanding first 180 grit paper followed 320 will leave polished scratch-free surface Ditsler Primer extremely thick needs thinned use dope thinner two parts primer three parts thinner spraying Simulation panel lines surface model easily accomplished using masking tape unthinned primer Tape laid along line desired generous coating primer brushed along edge can sanded down tape line using same two grades paper feathered out surrounding area Remove tape realistic panel line appears Use thicker tape two layers deeper lines Intersecting lines require careful sanding avoid removal previously built-up lines An ideal tape purpose leaves sharp lines Karoden Flex-Mask hobby shop will make curved lines represent edges fillet outlines quite difficult obtain standard masking tapes Any popular model finishing materials can applied over Ditzler Primer including dope have used Floquil model railroad paint flat finish simulate camouflage Its ad vantage covers very large areas small amounts material minimum weight covers extremely well coat colors bleed Adhesion good test panel treated raw fuel seemed unaffected except slight change gloss due oil residue Five six fluid ounces will cover sixfoot model scale flight realism Letters continue arrive controversial subject Vince Risovi have reading some what detached interest discussion Model Aviation other publications continuing saga realism flight judge recently published excerpt Dale Johnson scale speed has prompted entry 24 Model Aviation scene popular campground famous Kitchener-Waterloo Scale Rally Plenty space despite large numbers campers Note clipped grass two scale models Kitchener-Waterloo Scale Rally held Ontario Canada portion huge throng spectators participants attendance 79 event postal roundtable As hardheaded Virginians Dale unable convert test scale speed feel strong sense deja vu provide again few thoughts whats wrong Dales idea full-scale plane modelwhen spaced distances observer would make appear same sizeshould basically appear track along together same speed problem stems increasing field view human eye increasing ranges viewers perception speed largely matter quickly object traverses range field view perception speed specifi cally ajudge what dealing isnt Since field view increases increas ing range far away objects full-scale plane always seem moving slower nearby objects model speed As drive down highway example notice quickly telephone poles located near road seem moving Yet identically-spaced poles farther away seem almost stand still Both sets poles moving same speed near ones model Dales analogy seem going faster stand close Interstate dare get sense fast cars going However get back few hundred feet hardly seem moving Both however going same actual scale speed Dales proposal neither academically sound nor prac tically workable final word scale speed may before moving new ground attempt ing achieve realism reduced scale talking about dynamic modeling literature dynamic modeling exemplified Brad Continued page 109 ay jennings os Lounsy Rntrim Northern Ireland displays model Rutan Quickie reports flying characteristics model now excellent CG located shown Walter Wirths letter August1978 issue Mode/Aviation Model has balsa fuselage foam wings Enya 45 power Its 48-in wingspan makes just slightly less quarter scale October 198025 1/4-TURN LATCH THE PERFECT WAY TO LATCH YOUR HATCHI OR YOUR COWL CANOPY INSPECTION COVERETC SIMPLE TO LINE UP AND INSTALL PERFECT ALIGNMENT EVERY TIME YOSURFACE AND CAN BE PAINTED THE COLOR THIS IS ALL YOU SEE THE HEAD FITS FLUSH WITH OF YOUR MODEL THEY LOOK AND WORK JUST LIKE THE REAL THING THE SPRING-LOADED MECHANISM POSITIVELY LOCKS OR RELEASES WITH MERE 1/ TURN OF SCREWDRIVER AL SIZE IS ONLY % x 1/GUI - ALL STEEL ASSEMBLY REQUIRED BRASS MACHINED PARTS 2 SETS FOR PERFECT FOR PLANES BOATS CARS AND HELICOPTERS 0 242 DU-BRO PRODUCTS INCORPORATED 480 Banner Road Wauconda IllInoIs 60084 U S Some examples Belier rotor head linkages will given next month See way have new ham radio callN4DFH no gear Ill have build super radio helicopter ala George Myers Ace Silver Seven Nice 4 Dave Eying Helicopters Dave Chesney Rt 9 Box 62 IA Greensboro NC 27409 RC Scale/Wischers Continued page 25 Powers recent articles MA relatively complete being tried true tool engineer Just other parameters model simply full-scale value divided scale factor weight area horsepower name few neither scale speed has go literature apply However since arent using radar timing traps like accurately measure scale speed such precision calculation measurement unnecessary What required workable approach determination flight realism scale speed however measured being factor have victimin scale modeling pursuits along East Coastof two miscon ceptions largely product ruminations John Preston have lot respect 1 flight realism consists scale speed 2 realistic speed slow last years Bealeton Scale Meet let hasten say well run complete pleasure placed third Sport Scale Byron Pitts flown plane fairly putt-putted around sky being marginal edge underpowered no vertical perform ance loops small rolls slow judges following guidance slow good slower gooder felt plane flying excellent scale speed However astonished during full-scale airshow followed meet Pitts Special tore up sky its blazing speed seemingly un limited vertical capability crisp maneuvers agreed surprise model Pitts too slow never thought Id ever hear Youve hit nail head coin phrase answer judge flight realism whole range factors overall speed being just factors Heres start few items might include some future guide flight realism judging Does model use throttle flight control No aircraft Im aware completes loop full throttle runs wide open through out entire flight 2 Are maneuvers chosen appropriate aircraft modeled Ever see scale business aircraft execute loop option scored Ever see model P-5 1 make inverted pass deck real couldnt wouldnt have done could realistic model like manner aerobatically capable subject flown through four different names straight level flight such strafing run missed approach overshoot etc must also downgraded realism 3 Are maneuvers properly chosen executed realistic manner Ive seen scale P-39 execute axial roll little its fuselage length get high marks Ive seen retracts get 9 10 score total retractextend cycle lasted no longer blink Realistic 4 entire flight realistic just chosen maneuvers plane retract gear Add $2 shipping N Y State residents add tax Dealer inquiries invited Name jAddress _____________ AptI ICityStateZip I0 Master Charge C Visa El Expiration DateI ICard NoI C Check enclosed $I SignatureI October 1980 109 WORLD WAR II Build 5 Profile Aircraft ENTERPRISE book 11 14 contains 8 E Atchiaon 3 different color schemes aircraft construction views dena CA 91104 full size templets Just trace cut shape glue paint youre$650 Shiepins cal Res ready goadd sales tax Schiuter Elastic motor mounts designed reduce high frequency engine vibrations Install Heli Boy 2minutes Final Connection Available nowa ball joint designed withstand hardest muse abuse Rugged Construction Dragless Push rod depth visually determined Applicable types aircraft cars boats Available quantity balls#058NT Update helicopter sensational ball lonts Izi -I See dealer order direct *0 4tct9$49#o 2594 North Orange Blossom Trail ndo Florida 32804 305-422-1531 305-647-1355 down entire flight whether retracts option cannot judged highly realistic model flown Pattern-style split-S turn arounds end pass realistic plane pilot stands behind runway caller holds full throttle lets go banzai charge security altitude representation anything Ive seen airports Presumably hand vertical fin represents hand God protects aviators cant fly conventional gear 5 Does aircraft react its environment plane gets blown around wind should downgraded simply because does 747 also gets blown around wind rock-steady platform some judges seem demand models theres low ceiling low visibility model operated pilot actually derriere seatthat carefully close 1 suppose could go reams paper flight realism think share some common opinions may singing choir Let close however recommending Scale judges make point watch some fullscale aircraft doing thing small strips airshows fly-ins commercial airports would go long way toward evaluating Scale model way approximates fullscale counterpart nothing should dictate rules something should encourage part general program ofjudging improve ment Some points mentioned Vinces letter now covered newly-approved RC Scale Flight Judging Guide appears 1980-81 AMA rule book guide almost entirely work John Preston men tioned letter Airspeed pointed out 50 items guide briefly noted part Realism Flight realism being stressed important pars everything done during flight becoming key attainment high scores Scale competition Bob Dolly Wiseher Rr 1 S-221 Lapham Peak Road Delafield WI 53018 RC Soaring/Pruss Continued page 27 Rawdon conveying club news also includes excellent technical articles club boasts R&D department keeps busy tn past club has claimed national winners world record holder US F3B team member Hints likes Rich Pearson Chris Adams LSF V Barbara Henon Jerry Krainock Terry Koplan have provided enough winning secrets leave no excuses didnt take home marblesunless competing against now world-famous Gossamer Condor Gossamer Albatross two SFVSF members directly involved project level Blame Rawdon Bill Watson So want read about L/D trials cross-country desert dash upcoming Second World Cup twometer sailplanes subscribe Silent F/per Billy Forrey Editor 487 Mesa Road Santa Monica CA 90402 Check him rates third newsletter comes South Bay Soaring Society Tully Simoni president too called Silent Flyer like other two newsletters usually includes photographs some thing different sailplanes current issue besides technical articles covers RCM trophy Race told would lead-in sponsored R/C Modeler photos include some interesting concepts sailplane design designers include some gentlemen Great Britain Well considered gentle men until took race seriously annual classic 27 fliers site wind made racers weekend Four rounds eight heats flown Saturday end day four-way tie existed among Jerry Krainock Gerrard brothers EnglandRichard Paul Brian Irvine Tony Baker Solent Sailplanes showed /3scale ASW-I 7 weighed 26 pounds Wing span 22 feet weather racing racing did wind calmed Sunday evening Brian Irvine took home RCM Trophy Paul Gerrard went back England proud second place Ed Holder owner slope home-court advantage took third Its South Bay Soaring Societys Silent Flyer Contact Joan Irvine Editor South Bay Soaring Society Box 2012 Sunnyvale CA 94087 So feel 10-minute maxes spot landings have put flying rut check above-mentioned catalogs subscribe exchange club newsletters ones mentioned Youre guaranteed new horizons soaring Delayed flash department Craig Foxgord California member Pacific Soaring Society became 14th member League Silent Flight reach Level V Congratulations Dan Pruss RR 2 Box 490 Plainfield IL 60544 110 Model Aviation SOUTHERNS SORGHUM & FLEXALL THE STANDARDPLASTICIZER CONTACTFOR ADHESIVEACRYLICS FORAND SHEETINGDOPES FOAM WINGS WILL NOTSTOPS ATTACKCRACKING STYROFOAMAND CORES ICHIPPING DAVE BROWN PRODUCTS 8634 HUDDLESTON CINCINNATI OHIO 45236 AREA CODE 1513 791 0744 SEE YOUR DEALER OR DISTRIBUTOR
Edition: Model Aviation - 1980/10
Page Numbers: 24, 25, 109, 110
C SCALE Bob & Dolly Wischer FINISH all-metal prototypes silk dope finish method described last month may produce longest lasting toughest surface models expected have long life collection Fleet Trainer 37 years old finished nitrate dope Eme raude nine years butyrate dope shows few blemishes Some flaws appeared due use balsa substrate too soft weight-saving reasons tiny warps really stand out glossy surface Careful selection balsa would avoid problems have heard said butyrate dope continues shrink throughout its life have found true simulate surface all-metal proto type probably nothing realistic durable easy apply fiberglass cloth polyester resin Lightweight fiberglass cloth weighs e per square yard Finishing resin applied properly adds minimal weight affording maximum strength toughness Preparation structure sanding smooth progressively finer grades sandpaper same silk covering Dope used forming base covering because have found polyester resin will cure applied over dope Fiberglass cloth laid dry over surface covered finishing resin such supplied Sig K&B applied through cloth using short-haired rather stiffly-bristled brush Resin intended boats orforpatching rust spots cars suited purpose very difficult sand builds weight rapidly being too thick apply lightly Finishing resin can brushed out minimum layer quantity applied appears too wet can removed before setting up absorbent tissue However have found very little resin can removed tissue rubbing down seems good means bringing cloth close contact balsa surface An alternate method removal sanding after ward requiring additional time effort Fiberglass cloth very easy apply forms willingly around complex com pound curves After curing cloth resin sanded lightly special sandpapers will minimize effort such open-coat silicon carbide 180 320 grit intended wet-or-dry sanding painted sur faces point cloth weave remains evident now need fill weave metal-like surface resin would accomplish purpose added weight sanding choice shorter method Adding resin builds weight rapidly because nothing evaporates unlike dope material stays plane Filling done brushing spraying lacquer primer such Ditzler Primer 32 light gray color can obtained auto paint supply store After sanding relatively easy task weave still evident another prime coat required examine surface closely magnifying glass determine whether weave truly filled amount sanding will make difference final weight plane primer heavy can sanded way down cloth minimum weight can given light sanding first 180 grit paper followed 320 will leave polished scratch-free surface Ditsler Primer extremely thick needs thinned use dope thinner two parts primer three parts thinner spraying Simulation panel lines surface model easily accomplished using masking tape unthinned primer Tape laid along line desired generous coating primer brushed along edge can sanded down tape line using same two grades paper feathered out surrounding area Remove tape realistic panel line appears Use thicker tape two layers deeper lines Intersecting lines require careful sanding avoid removal previously built-up lines An ideal tape purpose leaves sharp lines Karoden Flex-Mask hobby shop will make curved lines represent edges fillet outlines quite difficult obtain standard masking tapes Any popular model finishing materials can applied over Ditzler Primer including dope have used Floquil model railroad paint flat finish simulate camouflage Its ad vantage covers very large areas small amounts material minimum weight covers extremely well coat colors bleed Adhesion good test panel treated raw fuel seemed unaffected except slight change gloss due oil residue Five six fluid ounces will cover sixfoot model scale flight realism Letters continue arrive controversial subject Vince Risovi have reading some what detached interest discussion Model Aviation other publications continuing saga realism flight judge recently published excerpt Dale Johnson scale speed has prompted entry 24 Model Aviation scene popular campground famous Kitchener-Waterloo Scale Rally Plenty space despite large numbers campers Note clipped grass two scale models Kitchener-Waterloo Scale Rally held Ontario Canada portion huge throng spectators participants attendance 79 event postal roundtable As hardheaded Virginians Dale unable convert test scale speed feel strong sense deja vu provide again few thoughts whats wrong Dales idea full-scale plane modelwhen spaced distances observer would make appear same sizeshould basically appear track along together same speed problem stems increasing field view human eye increasing ranges viewers perception speed largely matter quickly object traverses range field view perception speed specifi cally ajudge what dealing isnt Since field view increases increas ing range far away objects full-scale plane always seem moving slower nearby objects model speed As drive down highway example notice quickly telephone poles located near road seem moving Yet identically-spaced poles farther away seem almost stand still Both sets poles moving same speed near ones model Dales analogy seem going faster stand close Interstate dare get sense fast cars going However get back few hundred feet hardly seem moving Both however going same actual scale speed Dales proposal neither academically sound nor prac tically workable final word scale speed may before moving new ground attempt ing achieve realism reduced scale talking about dynamic modeling literature dynamic modeling exemplified Brad Continued page 109 ay jennings os Lounsy Rntrim Northern Ireland displays model Rutan Quickie reports flying characteristics model now excellent CG located shown Walter Wirths letter August1978 issue Mode/Aviation Model has balsa fuselage foam wings Enya 45 power Its 48-in wingspan makes just slightly less quarter scale October 198025 1/4-TURN LATCH THE PERFECT WAY TO LATCH YOUR HATCHI OR YOUR COWL CANOPY INSPECTION COVERETC SIMPLE TO LINE UP AND INSTALL PERFECT ALIGNMENT EVERY TIME YOSURFACE AND CAN BE PAINTED THE COLOR THIS IS ALL YOU SEE THE HEAD FITS FLUSH WITH OF YOUR MODEL THEY LOOK AND WORK JUST LIKE THE REAL THING THE SPRING-LOADED MECHANISM POSITIVELY LOCKS OR RELEASES WITH MERE 1/ TURN OF SCREWDRIVER AL SIZE IS ONLY % x 1/GUI - ALL STEEL ASSEMBLY REQUIRED BRASS MACHINED PARTS 2 SETS FOR PERFECT FOR PLANES BOATS CARS AND HELICOPTERS 0 242 DU-BRO PRODUCTS INCORPORATED 480 Banner Road Wauconda IllInoIs 60084 U S Some examples Belier rotor head linkages will given next month See way have new ham radio callN4DFH no gear Ill have build super radio helicopter ala George Myers Ace Silver Seven Nice 4 Dave Eying Helicopters Dave Chesney Rt 9 Box 62 IA Greensboro NC 27409 RC Scale/Wischers Continued page 25 Powers recent articles MA relatively complete being tried true tool engineer Just other parameters model simply full-scale value divided scale factor weight area horsepower name few neither scale speed has go literature apply However since arent using radar timing traps like accurately measure scale speed such precision calculation measurement unnecessary What required workable approach determination flight realism scale speed however measured being factor have victimin scale modeling pursuits along East Coastof two miscon ceptions largely product ruminations John Preston have lot respect 1 flight realism consists scale speed 2 realistic speed slow last years Bealeton Scale Meet let hasten say well run complete pleasure placed third Sport Scale Byron Pitts flown plane fairly putt-putted around sky being marginal edge underpowered no vertical perform ance loops small rolls slow judges following guidance slow good slower gooder felt plane flying excellent scale speed However astonished during full-scale airshow followed meet Pitts Special tore up sky its blazing speed seemingly un limited vertical capability crisp maneuvers agreed surprise model Pitts too slow never thought Id ever hear Youve hit nail head coin phrase answer judge flight realism whole range factors overall speed being just factors Heres start few items might include some future guide flight realism judging Does model use throttle flight control No aircraft Im aware completes loop full throttle runs wide open through out entire flight 2 Are maneuvers chosen appropriate aircraft modeled Ever see scale business aircraft execute loop option scored Ever see model P-5 1 make inverted pass deck real couldnt wouldnt have done could realistic model like manner aerobatically capable subject flown through four different names straight level flight such strafing run missed approach overshoot etc must also downgraded realism 3 Are maneuvers properly chosen executed realistic manner Ive seen scale P-39 execute axial roll little its fuselage length get high marks Ive seen retracts get 9 10 score total retractextend cycle lasted no longer blink Realistic 4 entire flight realistic just chosen maneuvers plane retract gear Add $2 shipping N Y State residents add tax Dealer inquiries invited Name jAddress _____________ AptI ICityStateZip I0 Master Charge C Visa El Expiration DateI ICard NoI C Check enclosed $I SignatureI October 1980 109 WORLD WAR II Build 5 Profile Aircraft ENTERPRISE book 11 14 contains 8 E Atchiaon 3 different color schemes aircraft construction views dena CA 91104 full size templets Just trace cut shape glue paint youre$650 Shiepins cal Res ready goadd sales tax Schiuter Elastic motor mounts designed reduce high frequency engine vibrations Install Heli Boy 2minutes Final Connection Available nowa ball joint designed withstand hardest muse abuse Rugged Construction Dragless Push rod depth visually determined Applicable types aircraft cars boats Available quantity balls#058NT Update helicopter sensational ball lonts Izi -I See dealer order direct *0 4tct9$49#o 2594 North Orange Blossom Trail ndo Florida 32804 305-422-1531 305-647-1355 down entire flight whether retracts option cannot judged highly realistic model flown Pattern-style split-S turn arounds end pass realistic plane pilot stands behind runway caller holds full throttle lets go banzai charge security altitude representation anything Ive seen airports Presumably hand vertical fin represents hand God protects aviators cant fly conventional gear 5 Does aircraft react its environment plane gets blown around wind should downgraded simply because does 747 also gets blown around wind rock-steady platform some judges seem demand models theres low ceiling low visibility model operated pilot actually derriere seatthat carefully close 1 suppose could go reams paper flight realism think share some common opinions may singing choir Let close however recommending Scale judges make point watch some fullscale aircraft doing thing small strips airshows fly-ins commercial airports would go long way toward evaluating Scale model way approximates fullscale counterpart nothing should dictate rules something should encourage part general program ofjudging improve ment Some points mentioned Vinces letter now covered newly-approved RC Scale Flight Judging Guide appears 1980-81 AMA rule book guide almost entirely work John Preston men tioned letter Airspeed pointed out 50 items guide briefly noted part Realism Flight realism being stressed important pars everything done during flight becoming key attainment high scores Scale competition Bob Dolly Wiseher Rr 1 S-221 Lapham Peak Road Delafield WI 53018 RC Soaring/Pruss Continued page 27 Rawdon conveying club news also includes excellent technical articles club boasts R&D department keeps busy tn past club has claimed national winners world record holder US F3B team member Hints likes Rich Pearson Chris Adams LSF V Barbara Henon Jerry Krainock Terry Koplan have provided enough winning secrets leave no excuses didnt take home marblesunless competing against now world-famous Gossamer Condor Gossamer Albatross two SFVSF members directly involved project level Blame Rawdon Bill Watson So want read about L/D trials cross-country desert dash upcoming Second World Cup twometer sailplanes subscribe Silent F/per Billy Forrey Editor 487 Mesa Road Santa Monica CA 90402 Check him rates third newsletter comes South Bay Soaring Society Tully Simoni president too called Silent Flyer like other two newsletters usually includes photographs some thing different sailplanes current issue besides technical articles covers RCM trophy Race told would lead-in sponsored R/C Modeler photos include some interesting concepts sailplane design designers include some gentlemen Great Britain Well considered gentle men until took race seriously annual classic 27 fliers site wind made racers weekend Four rounds eight heats flown Saturday end day four-way tie existed among Jerry Krainock Gerrard brothers EnglandRichard Paul Brian Irvine Tony Baker Solent Sailplanes showed /3scale ASW-I 7 weighed 26 pounds Wing span 22 feet weather racing racing did wind calmed Sunday evening Brian Irvine took home RCM Trophy Paul Gerrard went back England proud second place Ed Holder owner slope home-court advantage took third Its South Bay Soaring Societys Silent Flyer Contact Joan Irvine Editor South Bay Soaring Society Box 2012 Sunnyvale CA 94087 So feel 10-minute maxes spot landings have put flying rut check above-mentioned catalogs subscribe exchange club newsletters ones mentioned Youre guaranteed new horizons soaring Delayed flash department Craig Foxgord California member Pacific Soaring Society became 14th member League Silent Flight reach Level V Congratulations Dan Pruss RR 2 Box 490 Plainfield IL 60544 110 Model Aviation SOUTHERNS SORGHUM & FLEXALL THE STANDARDPLASTICIZER CONTACTFOR ADHESIVEACRYLICS FORAND SHEETINGDOPES FOAM WINGS WILL NOTSTOPS ATTACKCRACKING STYROFOAMAND CORES ICHIPPING DAVE BROWN PRODUCTS 8634 HUDDLESTON CINCINNATI OHIO 45236 AREA CODE 1513 791 0744 SEE YOUR DEALER OR DISTRIBUTOR
Edition: Model Aviation - 1980/10
Page Numbers: 24, 25, 109, 110
C SCALE Bob & Dolly Wischer FINISH all-metal prototypes silk dope finish method described last month may produce longest lasting toughest surface models expected have long life collection Fleet Trainer 37 years old finished nitrate dope Eme raude nine years butyrate dope shows few blemishes Some flaws appeared due use balsa substrate too soft weight-saving reasons tiny warps really stand out glossy surface Careful selection balsa would avoid problems have heard said butyrate dope continues shrink throughout its life have found true simulate surface all-metal proto type probably nothing realistic durable easy apply fiberglass cloth polyester resin Lightweight fiberglass cloth weighs e per square yard Finishing resin applied properly adds minimal weight affording maximum strength toughness Preparation structure sanding smooth progressively finer grades sandpaper same silk covering Dope used forming base covering because have found polyester resin will cure applied over dope Fiberglass cloth laid dry over surface covered finishing resin such supplied Sig K&B applied through cloth using short-haired rather stiffly-bristled brush Resin intended boats orforpatching rust spots cars suited purpose very difficult sand builds weight rapidly being too thick apply lightly Finishing resin can brushed out minimum layer quantity applied appears too wet can removed before setting up absorbent tissue However have found very little resin can removed tissue rubbing down seems good means bringing cloth close contact balsa surface An alternate method removal sanding after ward requiring additional time effort Fiberglass cloth very easy apply forms willingly around complex com pound curves After curing cloth resin sanded lightly special sandpapers will minimize effort such open-coat silicon carbide 180 320 grit intended wet-or-dry sanding painted sur faces point cloth weave remains evident now need fill weave metal-like surface resin would accomplish purpose added weight sanding choice shorter method Adding resin builds weight rapidly because nothing evaporates unlike dope material stays plane Filling done brushing spraying lacquer primer such Ditzler Primer 32 light gray color can obtained auto paint supply store After sanding relatively easy task weave still evident another prime coat required examine surface closely magnifying glass determine whether weave truly filled amount sanding will make difference final weight plane primer heavy can sanded way down cloth minimum weight can given light sanding first 180 grit paper followed 320 will leave polished scratch-free surface Ditsler Primer extremely thick needs thinned use dope thinner two parts primer three parts thinner spraying Simulation panel lines surface model easily accomplished using masking tape unthinned primer Tape laid along line desired generous coating primer brushed along edge can sanded down tape line using same two grades paper feathered out surrounding area Remove tape realistic panel line appears Use thicker tape two layers deeper lines Intersecting lines require careful sanding avoid removal previously built-up lines An ideal tape purpose leaves sharp lines Karoden Flex-Mask hobby shop will make curved lines represent edges fillet outlines quite difficult obtain standard masking tapes Any popular model finishing materials can applied over Ditzler Primer including dope have used Floquil model railroad paint flat finish simulate camouflage Its ad vantage covers very large areas small amounts material minimum weight covers extremely well coat colors bleed Adhesion good test panel treated raw fuel seemed unaffected except slight change gloss due oil residue Five six fluid ounces will cover sixfoot model scale flight realism Letters continue arrive controversial subject Vince Risovi have reading some what detached interest discussion Model Aviation other publications continuing saga realism flight judge recently published excerpt Dale Johnson scale speed has prompted entry 24 Model Aviation scene popular campground famous Kitchener-Waterloo Scale Rally Plenty space despite large numbers campers Note clipped grass two scale models Kitchener-Waterloo Scale Rally held Ontario Canada portion huge throng spectators participants attendance 79 event postal roundtable As hardheaded Virginians Dale unable convert test scale speed feel strong sense deja vu provide again few thoughts whats wrong Dales idea full-scale plane modelwhen spaced distances observer would make appear same sizeshould basically appear track along together same speed problem stems increasing field view human eye increasing ranges viewers perception speed largely matter quickly object traverses range field view perception speed specifi cally ajudge what dealing isnt Since field view increases increas ing range far away objects full-scale plane always seem moving slower nearby objects model speed As drive down highway example notice quickly telephone poles located near road seem moving Yet identically-spaced poles farther away seem almost stand still Both sets poles moving same speed near ones model Dales analogy seem going faster stand close Interstate dare get sense fast cars going However get back few hundred feet hardly seem moving Both however going same actual scale speed Dales proposal neither academically sound nor prac tically workable final word scale speed may before moving new ground attempt ing achieve realism reduced scale talking about dynamic modeling literature dynamic modeling exemplified Brad Continued page 109 ay jennings os Lounsy Rntrim Northern Ireland displays model Rutan Quickie reports flying characteristics model now excellent CG located shown Walter Wirths letter August1978 issue Mode/Aviation Model has balsa fuselage foam wings Enya 45 power Its 48-in wingspan makes just slightly less quarter scale October 198025 1/4-TURN LATCH THE PERFECT WAY TO LATCH YOUR HATCHI OR YOUR COWL CANOPY INSPECTION COVERETC SIMPLE TO LINE UP AND INSTALL PERFECT ALIGNMENT EVERY TIME YOSURFACE AND CAN BE PAINTED THE COLOR THIS IS ALL YOU SEE THE HEAD FITS FLUSH WITH OF YOUR MODEL THEY LOOK AND WORK JUST LIKE THE REAL THING THE SPRING-LOADED MECHANISM POSITIVELY LOCKS OR RELEASES WITH MERE 1/ TURN OF SCREWDRIVER AL SIZE IS ONLY % x 1/GUI - ALL STEEL ASSEMBLY REQUIRED BRASS MACHINED PARTS 2 SETS FOR PERFECT FOR PLANES BOATS CARS AND HELICOPTERS 0 242 DU-BRO PRODUCTS INCORPORATED 480 Banner Road Wauconda IllInoIs 60084 U S Some examples Belier rotor head linkages will given next month See way have new ham radio callN4DFH no gear Ill have build super radio helicopter ala George Myers Ace Silver Seven Nice 4 Dave Eying Helicopters Dave Chesney Rt 9 Box 62 IA Greensboro NC 27409 RC Scale/Wischers Continued page 25 Powers recent articles MA relatively complete being tried true tool engineer Just other parameters model simply full-scale value divided scale factor weight area horsepower name few neither scale speed has go literature apply However since arent using radar timing traps like accurately measure scale speed such precision calculation measurement unnecessary What required workable approach determination flight realism scale speed however measured being factor have victimin scale modeling pursuits along East Coastof two miscon ceptions largely product ruminations John Preston have lot respect 1 flight realism consists scale speed 2 realistic speed slow last years Bealeton Scale Meet let hasten say well run complete pleasure placed third Sport Scale Byron Pitts flown plane fairly putt-putted around sky being marginal edge underpowered no vertical perform ance loops small rolls slow judges following guidance slow good slower gooder felt plane flying excellent scale speed However astonished during full-scale airshow followed meet Pitts Special tore up sky its blazing speed seemingly un limited vertical capability crisp maneuvers agreed surprise model Pitts too slow never thought Id ever hear Youve hit nail head coin phrase answer judge flight realism whole range factors overall speed being just factors Heres start few items might include some future guide flight realism judging Does model use throttle flight control No aircraft Im aware completes loop full throttle runs wide open through out entire flight 2 Are maneuvers chosen appropriate aircraft modeled Ever see scale business aircraft execute loop option scored Ever see model P-5 1 make inverted pass deck real couldnt wouldnt have done could realistic model like manner aerobatically capable subject flown through four different names straight level flight such strafing run missed approach overshoot etc must also downgraded realism 3 Are maneuvers properly chosen executed realistic manner Ive seen scale P-39 execute axial roll little its fuselage length get high marks Ive seen retracts get 9 10 score total retractextend cycle lasted no longer blink Realistic 4 entire flight realistic just chosen maneuvers plane retract gear Add $2 shipping N Y State residents add tax Dealer inquiries invited Name jAddress _____________ AptI ICityStateZip I0 Master Charge C Visa El Expiration DateI ICard NoI C Check enclosed $I SignatureI October 1980 109 WORLD WAR II Build 5 Profile Aircraft ENTERPRISE book 11 14 contains 8 E Atchiaon 3 different color schemes aircraft construction views dena CA 91104 full size templets Just trace cut shape glue paint youre$650 Shiepins cal Res ready goadd sales tax Schiuter Elastic motor mounts designed reduce high frequency engine vibrations Install Heli Boy 2minutes Final Connection Available nowa ball joint designed withstand hardest muse abuse Rugged Construction Dragless Push rod depth visually determined Applicable types aircraft cars boats Available quantity balls#058NT Update helicopter sensational ball lonts Izi -I See dealer order direct *0 4tct9$49#o 2594 North Orange Blossom Trail ndo Florida 32804 305-422-1531 305-647-1355 down entire flight whether retracts option cannot judged highly realistic model flown Pattern-style split-S turn arounds end pass realistic plane pilot stands behind runway caller holds full throttle lets go banzai charge security altitude representation anything Ive seen airports Presumably hand vertical fin represents hand God protects aviators cant fly conventional gear 5 Does aircraft react its environment plane gets blown around wind should downgraded simply because does 747 also gets blown around wind rock-steady platform some judges seem demand models theres low ceiling low visibility model operated pilot actually derriere seatthat carefully close 1 suppose could go reams paper flight realism think share some common opinions may singing choir Let close however recommending Scale judges make point watch some fullscale aircraft doing thing small strips airshows fly-ins commercial airports would go long way toward evaluating Scale model way approximates fullscale counterpart nothing should dictate rules something should encourage part general program ofjudging improve ment Some points mentioned Vinces letter now covered newly-approved RC Scale Flight Judging Guide appears 1980-81 AMA rule book guide almost entirely work John Preston men tioned letter Airspeed pointed out 50 items guide briefly noted part Realism Flight realism being stressed important pars everything done during flight becoming key attainment high scores Scale competition Bob Dolly Wiseher Rr 1 S-221 Lapham Peak Road Delafield WI 53018 RC Soaring/Pruss Continued page 27 Rawdon conveying club news also includes excellent technical articles club boasts R&D department keeps busy tn past club has claimed national winners world record holder US F3B team member Hints likes Rich Pearson Chris Adams LSF V Barbara Henon Jerry Krainock Terry Koplan have provided enough winning secrets leave no excuses didnt take home marblesunless competing against now world-famous Gossamer Condor Gossamer Albatross two SFVSF members directly involved project level Blame Rawdon Bill Watson So want read about L/D trials cross-country desert dash upcoming Second World Cup twometer sailplanes subscribe Silent F/per Billy Forrey Editor 487 Mesa Road Santa Monica CA 90402 Check him rates third newsletter comes South Bay Soaring Society Tully Simoni president too called Silent Flyer like other two newsletters usually includes photographs some thing different sailplanes current issue besides technical articles covers RCM trophy Race told would lead-in sponsored R/C Modeler photos include some interesting concepts sailplane design designers include some gentlemen Great Britain Well considered gentle men until took race seriously annual classic 27 fliers site wind made racers weekend Four rounds eight heats flown Saturday end day four-way tie existed among Jerry Krainock Gerrard brothers EnglandRichard Paul Brian Irvine Tony Baker Solent Sailplanes showed /3scale ASW-I 7 weighed 26 pounds Wing span 22 feet weather racing racing did wind calmed Sunday evening Brian Irvine took home RCM Trophy Paul Gerrard went back England proud second place Ed Holder owner slope home-court advantage took third Its South Bay Soaring Societys Silent Flyer Contact Joan Irvine Editor South Bay Soaring Society Box 2012 Sunnyvale CA 94087 So feel 10-minute maxes spot landings have put flying rut check above-mentioned catalogs subscribe exchange club newsletters ones mentioned Youre guaranteed new horizons soaring Delayed flash department Craig Foxgord California member Pacific Soaring Society became 14th member League Silent Flight reach Level V Congratulations Dan Pruss RR 2 Box 490 Plainfield IL 60544 110 Model Aviation SOUTHERNS SORGHUM & FLEXALL THE STANDARDPLASTICIZER CONTACTFOR ADHESIVEACRYLICS FORAND SHEETINGDOPES FOAM WINGS WILL NOTSTOPS ATTACKCRACKING STYROFOAMAND CORES ICHIPPING DAVE BROWN PRODUCTS 8634 HUDDLESTON CINCINNATI OHIO 45236 AREA CODE 1513 791 0744 SEE YOUR DEALER OR DISTRIBUTOR