Hanging Caproni Aeronautical Museum Milan Italy torys memorable flying machines 3100-hp seaplane set absolute speed record 440677 mph Far faster landplane its day tandem-engined marvel clocked unoffi cially 475 mph 1934 still holds speed record seaplanes U Don Berliner FOR DOZEN YEARS Lind berghs transatlantic flight until World War II about begin fastest air planes world seaplanes GeeBee racers jazzy little Army Air Corps pursuits special experimental craft water-borne machines huge Top Two three MC 72s built 1931 Schneider Trophy Race Late 1932 No 180 flown three different pilots averaged 42377 mph over 3-km course set closed-circuit mark 391 mph over 100-km course won First Bleriot Cup averaging 385 mph half hour Cowl removed ship foreground reveals huge 24-cylinder Fiat en gineactually two AS 6 racing engines back back single crankcase Above rest water No 181 shows advantage contra-rotating props some skin radiators covered wings fuselage sides floats wide float struts January1978 49 NOrE THAT TAPER IN WING THICKNESS BEGINS AT SECTION Wi SEE PLAN PEAT SIDES FRQI HERE APT Drawings byJ H Robinson MODEL AV/AION SCALE f-O MACCH MC 72 0153 50 Model Aviation OLJRAL PANEL ON UNDERSIDE ONLY F-8 TYPICAL SECTION STRUT SECTION COLOURS OVERALL -- CRIMSON COOLANT & _ _ -BRASS OIL RADIATORS FLOAT UNOERSIDES TAIL LEGEND FTC SPINNERS PROPELLERSNATURAL WINGTIPS METAL AILERONS BRACING RUDDER AR/GI-IT GREEN STRIPING WI/lit SCARLET CARBURETTOR Il-ifAKE BLACK INSPECTION DOORS DURAL TO OIL COOLER --V THIS DRAWING SHOWS 107 AT THE 7934 PARIS SALON FOLLOWING THE RECORD QF 23-70 - PRESENT NODII7CA TIONS INCILIDE SHORTENED UNDER-FIN 0 MINOR CHANGES 70 PAINT FINISH 779 0 TAO WERE FITTED WITH LONGER FLOATS 0 VENTRAL COOLANT RADIATOR BUT OlD NOT ORIGINALLY HAVE EITHER THE EXTENDED UNDER FIN OR TUNNEL CARBURETTOR INTAKE 1SF t 21 T2 Wt TYPICAL SECT/ON EXTENDS TO ROOT 7 TB INCIDENCE IS CONSTANT s-ITYPICAL SECTION SIDES OF ELEVATORS ARE FLAT F 5 v ~F F F 5 DA TA 949On WING CHORD7-73O WiNG AREA NETT OVERALL LENGTH0610 , FUSELAGE LENGTHS* --- 0350 m FLOAT LENGTH** _ _ 6575 _ FLOAT TRACK2700, STABILIZER SPANS2920, PROPELLER 0/AMS59O EMPTY WEIGHT2500kg LOADED WEIGHT - -2 907kg *INCLUD/NG EXTENDED UNDER-FIN **EXCLUO/NG MOORING RINGS F-b 3I 11 5-W /67 /52 274 a- IOt5 9-7~ a- 6 s S2 Ii 64/0 II F-It R-I F8 7 I-I IT LEGEND January 1978 51 F-JF-4F-SF-6F-6A IF 11 [ U-ULJ jJ worked Telescoped propeller shafts passed between cylinder banks forward unit shaft driven via gear train engine Super charger aft end fed both units consumed 200 hp 3100 hp developed Photographs T C Weaver collection pontoons hanging below seeming contradiction known about streamlining two main reasons Schneider Trophy become politically important governments willing spend vast amounts money develop unlimited racing seaplanes demonstration technol ogy two Only endless water run ways long enough airplanes small high-speed wings take off days wide 10000-ft concrete strips 747s far future get off water penalty paid form pontoons sight two devices almost large fuselage hanging belly strikes terror heart modern designer helped considerably hurt several years during reign seaplane worlds fastest landplane 100 mph slower best its water cousins Thanks impetus magnifi cent Schneider Trophy US start ed trend series C irtiss military racers led ultii sleek two-wingers d Pulitzer Schneider rt 1920s bringing fame si Doolittle Curtiss R2 play National Air & S no matter sI can t answer 1 lems speed s parts struts holding double needed wing-ft course silly seco did offer advantages re improvements metals design about spell th plane race all-out s first turn theory Italians start c become historic series planes Macchi woi 1926 great extent Curtiss racer place ti its struts few iate biplanes minated es mid ch Jimmy -2 dis ace Museum e biplanes Itimate prob uck too n extra wing elage joints d wing uced weight md structural end bi eed reality what f racing seacs M39 monoplane e upper wing lim wires brace thin single wing placed low Curtiss-like fuselage Mario de Bernardi pilot three M39s won 1926 Schneider 264 mph barely 12 mph slower absolute world speed record set straight-away course French Ferbois landplane 1924 following year another name des tined glory added records Supermarine S5 piloted S N Webster won 1927 Schneider world record pace 282 mph though no official record set Little month later deBernardi again time new Macchi M52s failed finish 1927 Schneider speed 29782 mph first true absolute world speed record set sea plane 1928 mark composed four passes over 3-km/l86-mi course raised 31846 mph deBernardi clipped-wing version M52 worlds fastest landplane now 50 mph behind times fading fast British returned vengeance Waghorn won 1929 Schneider Race new Supermarine S6 329 mph Orlebar set world 3-km record 3577 mph same machine few days later Italians seen handwriting wall surren dered genius R J Mitchell soon create immortal Spitfire out seaplane experience yet Macchi developed M67 power up M52s 1000-hp Fiat 1400 hp 18-cylinder threebank Isotta Fraschini come naught M67s crashed test flight other two failed finish 1929 Schneider Race Well aware 1931 Schneider would last long impor tant series British succeeded win ning third straight time men Macchi set work create clean est powerful airplane world ever seen achieve go radical design since conven Continued page 102 52 Model Aviation ground crew swarms over o 1 1 just betore averaged 4411577 tour dashes over 3km course 19344-1/2 years later its mark fell landplanethe Heinkel He100 464 mph will score high am static judg ing scale contest entries start maxmum points As see omitted details incorrect color markings points start deducted errors see between scale documentation model less will final static score So sure add obvi ous features show documen tation brings us subject proofof-scale documentation absence scale documentation part sev eral contestants recent scale contest made think article might some use would surprised times someone will enter con test just see model will rank against fellow modelers However same contestants will 3-view drawing will have nothing show chosen color scheme did exist full scale aircraft Without vital pieces paper judges can award craftsmanship points since can score maximum 30 points chances placing will dim Very few aircraft available model kits have subject magazine article book Model magazines constantly featuring articles about full-scale aircraft usually clude both 3-views photographs Color pictures less likely found mag azines books excep tions best proof scale source full-scale aircraft itself should present no problems Piper Cub some other aircraft proliferates local airport B-17 however likely found locally unless live Har lingen Texashome Confederate Air Force have access full-scale aircraft afternoon camera should produce necessary docu mentdtion Beware however poor film exposure discount processing colors print taken family instant camera developed local drug store may bear little resemblance actual sub ject Especially difficult photograph aircraft displayed museums lit fluor escent lights have discovered satis factory filter correct colors either daylight tungsten film used under fluo rescent lighting find own flash unit acceptable form lighting museum subject photographic presen tation used document sub ject recommend give judges minimum number pictures show major features prototype show close-ups details sure same details appear model An other reason build large scale details such venturis navigation lights fairings etc easier build large final note Take helper first scale contest Ill guarantee hands will shaking like yours product review product review product review flight line always start first flip engine wont give hint pop Count everything going wrong contest mind work out ahead time helper responsible what you will automatically prepared M acchi/Berliner continued page 52 tional ideas pretty well taken practical limits turn stretched out development period far beyond 1931 Schneider allowed British win opposition retire trophy lobby Royal Aero Club London Italians following route others attacking 3-km world speed record own ways Across Atlantic America mili tary pulled out speed race leav ing wide open civilians meant marvelous home-made machines thrilling nation National Air Races Craft like barrel-shaped GeeBee conventional Wedell Williams straining poor little hearts out trying hit 300 mph Shell Speed Dash small-time stuff men thinking terms 400 mph seaplanes 1000-hp P&W Wasps American racing scene excited mere toys compared Rolls Royce Fiat engines European counterparts using obviously needed reach strange new world 400 mph two basic routes could followed greater speed Radical air frames radical powerplants clear some major changes would have made Italians ever beat 358 mph 1900-hp Supermarine Radical racers never very suc cessful past still arent 1929 Piaggio Pc7 racer might have real record-breaker its retractable hydrofoils place pontoons never flew contemporary Savoia Marchetti 565 twin-boom affair 1000-hp engines either end central pod never de-bugged enough show its potential Still idea two engines fuse lage appealed Macchi works way combine greatly increased power limited drag singleengined airplane Together Fiat Company built type AS5 engine used previous successful seaplane racers Macchi created ultimate watercraft Macchi-Castoldi MC72 Aerodynamically just same philosophy Macchi done well past long thin fuselage minimum wings tiny windshield huge pontoons neatly faired struts sup porting powerplant another kettle fish 102 Model Aviation MR MODELER manufacture special ized accessories make R/C modeling easier never out stock items manufacture Seeyour deal er send first class stamp catalog sheets listing over 70 items complete pictures prices OVER 12 YEARS SERVICE FUEL IT FLIT IT N GO _ Other Davis Diesel Produc5a 0-Varnishing Brushes 020-60 0 Fuel Bulbs land 2 oz 1/2A Fuel Line Asst 1/4 l/2A Twin Exhaust Stax Send SASE literature - Deelee inquiries invited DIESEL CONVERTERS $995 Up 50% power 50% economy glow new fuel formula Fuel. Pt $350 Qt $500 $100 P & H f5iAsk/o ur dealer add $150 p&h L.J order direct Co nn Res add ST Davis Diesel Dewlopment Inc BOX 141 DEPT E MILFORD CT 06460 PHONE 203 877-1670 product review product review product review Prop Balancer have ever rigged pair razor blades mandrel balancing propellers welcome gadget Handy use allows balancing prop across short axis well usual long axis Can carried handily pocket use cap ends unscrewed cartridge-like case pin base set flat level surface cone piece threaded prop hole per instructions prop placed pin check balance Price $295 Du-Bro Products Inc 480 Bonner Rd Wauconda IL 60084 Basically two AS5s linked gether back-to-front crankcase two V-12s two entirely separate crankshafts revolving opposite directions geared propeller drive shaft located between cylinder banks forward 'engine~ drive shafts telescoped drove two-bladed prop revolved opposite directions thus comprising first contra-rotating propellers ever stalled airplane obvious external dif ferencetwo props centerlineand also clue biggest reason MC72 superior come before did permit full power 50-liter 3100 cu engine used eliminated awful effects torque caused other powerful racing seaplanes dig pon toon deep water power applied great sounding idea dif ferent enough men created along siege teething troubles supercharger fed both engines least successful part entire operation according Dr Vandone engineer charge development Fiat Its efficiency low 1931 rotor-shaft bearings problem friction clutch small compact either worked too well correct clutch slippage high speed different discs tried along kinds teeth pinion major problems faced men wanted go faster anyone else cooling engine fat radial stuck right out front wind could get no great challenge airplane in-line engine tightly cowled reduce drag cooling came very big headache Ordinary water wasnt up task keeping racing engine melting high rpm since ethylene-glycol just being developed USA wasnt available first Italians went another technique Skin sur face radiators far area could possibly achieved ordinary flow-through radiators managed keep temperature down manage able level long enough set speed records system no value mili tary commercial planes worked well enough short blast idea used effectively Curtiss Racers 1920s later used special Messerschmitt set landplane record 1939 soon faded out wings struts floats tail MC72 covered skin radi ators water oil no way increase cooling area relatively new ethylene-glycol tried coolant found unsatis factory installation Heat problems showed up first valves dif LJLJ r ~1 Fren PEA NO PEDPLE QUALITY KIT DESIGNED ESPECIALLY FOR THE NEW MINIATURE RADIOS L BUT EASY TO FLY SPECIFICATIONS WINGSPAN 25 INCHES POWER 020 GAS ENGINE RADIO MINIATURE 2-3 CHANNEL FLYING WT R TO 10 OZ KIT INCLUDES CUT BALSA AND PLYWOOD FORMED LANDING GEAR & CANOPY HARDWARE FOR CONTROLS KIT $1495 ASK AT YOUR LOCAL DEALER IF NOT AVAILABLE ORDER DIRECT ADD 75g PEANUT SCALE KITS AND HARD TO FIND ITEMSBROWN CO-2 ENGINES COMPLETE CATALOG 5O Peck.PeIvmesP 0 BOX 2498 -AMLA MESA CALIF 92041 WPHONE 17141 469-8675 1714 442-46362 ferent techniques tried cooling Small improvements made until cylinder heads redesigned did valves cool properly During tests 1000 valves made 12 different sets valve-springs-and-cam shafts tried test engines tests ran April June 1931 leaving just over two months until Schneider Trophy Race still problems ignition supply fuel-air mixture getting cylinders tests changes tests first AS6 engines fly MC72 left water June 22 low-com pression version final engine devel oping 2300 hp against hopedfor 3000 hp competition far ready back-fired first flight trouble its fuel pumps ran hot something wrong wires bracing wings too Any hope getting England Schnei der gone attention switched get ting three airplanes ready attack world speed record especially view events other countries new Supermarine S6B came through classy win final Schneider Race 340 mph wiped out absolute record 358 mph slashing 407 mph February 1932 MC72 its radical engine finally passed official Italian Government tests required five passes over simulated speed course high power British meanwhile decided let things go figuring 407 mph British airplane could possibly achieve until 1938 would begin think seriously about getting back race Cleveland 1932 Doolittle increased landplane record 294 mph GeeBee R-l Super Sportster unknow ingly demonstrated just far US behind Half year later usually quiet lake edge Italian Alps MC72 began show its stuff Piloted Warrant Officer Francesco Agello MC72s 2800-hp Fiat AS6 engine showed world indeed worth trouble four passes over 3-km course Lake Garda near Desenzano Agello averaged 42377 mph first three nearly-identical air planes serial-numbered 179 almost 50% faster fastest Ameri can airplane fastest landplane world come October Casinelli used same air plane set world speed record 100-km closed circuit 391 mph later same month third pilot Italian High-Speed Flight Scapinelli used #180 win first Coupe Bleriot aver aging 385 mph half hour Intended replacement Schnei der Bleriot Cup years fastest flight least 30 minutes go permanently first pilot averaged over 1000 kph 621 mph half hour pipe-dream time praiseworthy achievements MC72 attracted great acclaim Italian Air Force especially bombastic II DuceItalys dictator Benito Mussolini applause also went Gen Italo Balbo commander Regia Aeronautica later die under mys terious circumstances after running afoul Mussolini well Macchi Fiat directly respon sible splendid demonstration great extent Fascist politicians received greatest bene fit non-political cheers friends future foes alike somewhere along line Fascists screwed things up never officially admitted understandably solid reason believe civilian test pilot Simeone Marsone actually flew MC72 fastest Mussolini wanted credit go Air Force times never submitted FAI According very good source Marsone clocked amazing 475 mph sometime 1934 As 424-mph mark lasted year half Oct 23 1934 Fran cesco Agello again climbed MC72 prepared let er rip over Lake Garda time however #181 January1978 103 1/3 SIZE SR FALCON M kII LIBERTY BELL MODEL No 101 No 103 No104 No112 No118 No121 No 123 No124 No 125 No 131 No134 No 136 No 141 No146 No147 No149 No 151 No153 No165 No159 No 164 No165 No166 No168 No169 No 172 No 174 No 176 No177 No 178 No 160 No181 No183 No 184 No185 No186 No187 No188 No189 No 190 No191 No192 No193 No194 No195 No196 No197 No 198 No 199 No200 No201 No 202 No 203 No204 No205 No 206 No 207 No 208 FULLSIZE PLANS No 209 Seastrutz$450 RC bipe 3 channels 19 wheels pontoons No 210 Simplex$450 FF years development contest wns049/051 No211 Together IV$375 CL Somewhat large impressive stuntor 46 Consistent winner Short Seamew 40-powered Class Carrier model good prototype lends itself innovations $300 Kloud King 15-19 AC Old-Timer Free Flight based upon 1938 record breaker FF $400 Wiley Post Biplane Petite durable scale design forsither rubber tail wagger pulse rudder $225 Sneat Sport AC glider simple job thet can flown engine $275 GollyGeeWhz Dan Rutherfords simple Half-A powered Combat job turns dime $150 Gremlin Sturdy acrobatic AC biplane flies well 35s up 80s $300 4-Bits 40-powered AC 600 Club Racer has winning ways Good sport too $400 Semi-Pm Contest-winning HI glider hess pop-up tail dethermalizer $100 IlaIf-Korda rubber John Oldenkamps 112-size all-balsa Old-Timer $1 76 Gee Bee Model Y 40-powered AC stand-off scale great old-time racers. *600 Celliato superb Standard Class AC sailplane also took Nats first $400 Flaselar $torch AC scale model 23-45 5-channel has both slots flaps $400 Blackburn Monoplane AC Scale rendition history-maker wheels floats 40 engine $480 QuickSilver AC 1/2A Pylon Racer incorporates latest techniques $200 8-1 AC 15 USAF bomber full house Ace foam wings Stable $275 Comedian AC fun-fly acrobatic biplane good looker 40 80 $400 Nesmith Cougar FF rubber scale 30-in span Excellent design long flights $300 Cerberua AC 50-powered Pattern job retracts advanced features $475 Tellipsoar AC Standard Class sailplane wins stand-cdt performance $1000 Tercal Keith Trostlas /2A Cl Stunt ship flies excellent pattern $200 Pogo AC Formula Pylon racer deBolt based full-scale Owl $750 Midget Mustang CL 1975-1976 Nats winning Goodyear byJohn Ballard $200 Nothing Fancy AC biplane 35 engines pretty handles beautifully $825 Simiter AC apectaculer flying-wing 15 fin-mounted tractor $300 Dennyplane AC version famed cabin model kit 193719-25 $400 Tutorn AC Cabin model scale-like performance 25-35 $325 Iron Dog AC Quarter Midget Bell Airacobra has won Pylon contests $400 Qua dCoupe rubber power $his attraqtive Coupe has excellent performance $300 Zonker AC canard hastltt5fllIItii~r 40 power$300 Country Boy FF JirnCteriv thbrougbbred/09/5 1 1/2A $300 Bristol Scout AC 02 power scale pulse rudder small radios $200 Bed Chock Charlie AC Scale model Russian PT trainer 09/15 $300 Answer AC FF cabin 02 sized Replica Old-Timer $175 SevIlle AC Sport low-wing sailplane 80 wing has excellent performance $350 Chester Slow CL Slow Combat model Dan Rutherford frequent winner $275 Fancy Pants AC Sport/Aerobatic low-wing has ply-skin fuselage 25s 45s $480 BiVSoy FF Unlimited Class rubber model no frills great performer $300 Rockette FF model Jetex-type power isa Nationals winner $150 Vintage 11 AC Antique type old-time open fuse construction 60 $475 Snake CL Rat racerby Dick Lambartlatest state art $200 Mountaineer AC Slope Soarer Clarence Haughtgood can get $375 Chipmunk AC Scale winner 1976 World Championships Nets $900 Stiletto CL stunt model McDonald winner 1976 FAI World Champs $375 Vol Ubre FF rubber-powered Wakefield Bob White Great winner $275 Hats Biplane AC aerobatic scale job takes 40/50 built-in muffler $475 Mirage Sharwood Buckataffs Fast Combattwice Nats winner $250 Fokker T-2 Nets winning FF scale electric poweredAstro 02 etc $275 Sporteter AC deBolt wing choice aerobatics/racing *375 P3 AC Cox 09 Ace foam wings step up 049 jobs $350 Ole Reliable CL Formula 40 speed job Snyders Nets winner $175 Roll Out FF hand-launch glider has pop-up dethermalizer $100 Avenger CL profile 049 uses sheet wing maneuverable $160 PokkerDVIII AC 45 60 Two sheets 2-1/2 scale $900 Cardboard Douglas M-2 CL 50 biplane 40power less $10 expense $600 Rock AC aerobatics 19-40 engines Simple tail-dragger $360 Air Camper FF Pisetanpol 1/2A Charming old-timer 2-sheets $300 Uvesay DL 5 AC English honiebuilt 3-clmen. 16s Exotic easy Good flier $500 Swinger CL 1 /2A all-balsa swing-wing Fly fun use experiments $2 00 Circle numbers plans wish order 104112118121 147149151153 174176177178 189190191192 201202203204 Please print carefully 101 103 123124125131134136141146 155159164165166168169172 180181183184185186187188 193194195196197198199200 205206207208209210211 Enclosed $ NAME CITY 710 STATE Price includes first-class postage Send check money order payable ModelAviation AMA 815 Fifteenth St. NW Washington DC 20005 smaller lighter floats engine up its full 3100 hp about 200 hp absorbed supercharger times 3-km dashes 1529 sec 1519 sec 1518 sec 1523 sec speed figured out 440677 mph far short 475 mph may have achieved civilian filed accepted FAI remains almost 43 years later highest official speed ever attained prop-driven seaplane 41/2 years after Agello set MC72s record remained absolute world mark airplanes types until Hans Dieterle flew 464 mph pro totype Heinkel He-l00 did landplane fly faster greatest racing seaplanes World War II understandably tough military racing airplanes He-l00 ferocious Me-209 barely beat its record few days later both inno cent victims Allied bombing raids fuselage Me-209 remains Polish museum final record-holding Macchi-Castoldi 72 however managed get through some very trying years Today #181 Caproni Aeronautical Muse um Milan Italy looking beautiful powerful unbelievably fast did 1934 caused aviation world shake its head wonder Editors Note press time information received source expert MC 72 aircraft two ships also lost training ADVERTISERS INDEX Ace Radio Control ndrews Aircraft Model Co ove rite28 94 Cox Hobbies Inc15 Davis Diesel Development102 Du-Bro Products3 EK-Logictrol7 Flyline Models96 Fox Mfg Company7 Carl Goldberg Models20 Grish Brothers88 Helmut Bernhardt99 Hobby Hideaway100 Hobbypoxy91 K&B Mfg85 Kraft Great Lakes Inc97 Midwest Model Products6 Morrison Repla-Tech100 Pactra Industries83 Peck-Polymers103 Progress Mfg Company86 Pylon Publications92 R/C Buyers Guide93 Rocket City Specialties102 Sig Mfg Company1 Sterling Models Inc5 Tatone Products Inc87 Top Flite Models Inc81 Westport International89 Williams Brothers90 World EnginesBack Cover 104 Model Aviation
Edition: Model Aviation - 1978/01
Page Numbers: 49, 50, 51, 52, 102, 103, 104
Hanging Caproni Aeronautical Museum Milan Italy torys memorable flying machines 3100-hp seaplane set absolute speed record 440677 mph Far faster landplane its day tandem-engined marvel clocked unoffi cially 475 mph 1934 still holds speed record seaplanes U Don Berliner FOR DOZEN YEARS Lind berghs transatlantic flight until World War II about begin fastest air planes world seaplanes GeeBee racers jazzy little Army Air Corps pursuits special experimental craft water-borne machines huge Top Two three MC 72s built 1931 Schneider Trophy Race Late 1932 No 180 flown three different pilots averaged 42377 mph over 3-km course set closed-circuit mark 391 mph over 100-km course won First Bleriot Cup averaging 385 mph half hour Cowl removed ship foreground reveals huge 24-cylinder Fiat en gineactually two AS 6 racing engines back back single crankcase Above rest water No 181 shows advantage contra-rotating props some skin radiators covered wings fuselage sides floats wide float struts January1978 49 NOrE THAT TAPER IN WING THICKNESS BEGINS AT SECTION Wi SEE PLAN PEAT SIDES FRQI HERE APT Drawings byJ H Robinson MODEL AV/AION SCALE f-O MACCH MC 72 0153 50 Model Aviation OLJRAL PANEL ON UNDERSIDE ONLY F-8 TYPICAL SECTION STRUT SECTION COLOURS OVERALL -- CRIMSON COOLANT & _ _ -BRASS OIL RADIATORS FLOAT UNOERSIDES TAIL LEGEND FTC SPINNERS PROPELLERSNATURAL WINGTIPS METAL AILERONS BRACING RUDDER AR/GI-IT GREEN STRIPING WI/lit SCARLET CARBURETTOR Il-ifAKE BLACK INSPECTION DOORS DURAL TO OIL COOLER --V THIS DRAWING SHOWS 107 AT THE 7934 PARIS SALON FOLLOWING THE RECORD QF 23-70 - PRESENT NODII7CA TIONS INCILIDE SHORTENED UNDER-FIN 0 MINOR CHANGES 70 PAINT FINISH 779 0 TAO WERE FITTED WITH LONGER FLOATS 0 VENTRAL COOLANT RADIATOR BUT OlD NOT ORIGINALLY HAVE EITHER THE EXTENDED UNDER FIN OR TUNNEL CARBURETTOR INTAKE 1SF t 21 T2 Wt TYPICAL SECT/ON EXTENDS TO ROOT 7 TB INCIDENCE IS CONSTANT s-ITYPICAL SECTION SIDES OF ELEVATORS ARE FLAT F 5 v ~F F F 5 DA TA 949On WING CHORD7-73O WiNG AREA NETT OVERALL LENGTH0610 , FUSELAGE LENGTHS* --- 0350 m FLOAT LENGTH** _ _ 6575 _ FLOAT TRACK2700, STABILIZER SPANS2920, PROPELLER 0/AMS59O EMPTY WEIGHT2500kg LOADED WEIGHT - -2 907kg *INCLUD/NG EXTENDED UNDER-FIN **EXCLUO/NG MOORING RINGS F-b 3I 11 5-W /67 /52 274 a- IOt5 9-7~ a- 6 s S2 Ii 64/0 II F-It R-I F8 7 I-I IT LEGEND January 1978 51 F-JF-4F-SF-6F-6A IF 11 [ U-ULJ jJ worked Telescoped propeller shafts passed between cylinder banks forward unit shaft driven via gear train engine Super charger aft end fed both units consumed 200 hp 3100 hp developed Photographs T C Weaver collection pontoons hanging below seeming contradiction known about streamlining two main reasons Schneider Trophy become politically important governments willing spend vast amounts money develop unlimited racing seaplanes demonstration technol ogy two Only endless water run ways long enough airplanes small high-speed wings take off days wide 10000-ft concrete strips 747s far future get off water penalty paid form pontoons sight two devices almost large fuselage hanging belly strikes terror heart modern designer helped considerably hurt several years during reign seaplane worlds fastest landplane 100 mph slower best its water cousins Thanks impetus magnifi cent Schneider Trophy US start ed trend series C irtiss military racers led ultii sleek two-wingers d Pulitzer Schneider rt 1920s bringing fame si Doolittle Curtiss R2 play National Air & S no matter sI can t answer 1 lems speed s parts struts holding double needed wing-ft course silly seco did offer advantages re improvements metals design about spell th plane race all-out s first turn theory Italians start c become historic series planes Macchi woi 1926 great extent Curtiss racer place ti its struts few iate biplanes minated es mid ch Jimmy -2 dis ace Museum e biplanes Itimate prob uck too n extra wing elage joints d wing uced weight md structural end bi eed reality what f racing seacs M39 monoplane e upper wing lim wires brace thin single wing placed low Curtiss-like fuselage Mario de Bernardi pilot three M39s won 1926 Schneider 264 mph barely 12 mph slower absolute world speed record set straight-away course French Ferbois landplane 1924 following year another name des tined glory added records Supermarine S5 piloted S N Webster won 1927 Schneider world record pace 282 mph though no official record set Little month later deBernardi again time new Macchi M52s failed finish 1927 Schneider speed 29782 mph first true absolute world speed record set sea plane 1928 mark composed four passes over 3-km/l86-mi course raised 31846 mph deBernardi clipped-wing version M52 worlds fastest landplane now 50 mph behind times fading fast British returned vengeance Waghorn won 1929 Schneider Race new Supermarine S6 329 mph Orlebar set world 3-km record 3577 mph same machine few days later Italians seen handwriting wall surren dered genius R J Mitchell soon create immortal Spitfire out seaplane experience yet Macchi developed M67 power up M52s 1000-hp Fiat 1400 hp 18-cylinder threebank Isotta Fraschini come naught M67s crashed test flight other two failed finish 1929 Schneider Race Well aware 1931 Schneider would last long impor tant series British succeeded win ning third straight time men Macchi set work create clean est powerful airplane world ever seen achieve go radical design since conven Continued page 102 52 Model Aviation ground crew swarms over o 1 1 just betore averaged 4411577 tour dashes over 3km course 19344-1/2 years later its mark fell landplanethe Heinkel He100 464 mph will score high am static judg ing scale contest entries start maxmum points As see omitted details incorrect color markings points start deducted errors see between scale documentation model less will final static score So sure add obvi ous features show documen tation brings us subject proofof-scale documentation absence scale documentation part sev eral contestants recent scale contest made think article might some use would surprised times someone will enter con test just see model will rank against fellow modelers However same contestants will 3-view drawing will have nothing show chosen color scheme did exist full scale aircraft Without vital pieces paper judges can award craftsmanship points since can score maximum 30 points chances placing will dim Very few aircraft available model kits have subject magazine article book Model magazines constantly featuring articles about full-scale aircraft usually clude both 3-views photographs Color pictures less likely found mag azines books excep tions best proof scale source full-scale aircraft itself should present no problems Piper Cub some other aircraft proliferates local airport B-17 however likely found locally unless live Har lingen Texashome Confederate Air Force have access full-scale aircraft afternoon camera should produce necessary docu mentdtion Beware however poor film exposure discount processing colors print taken family instant camera developed local drug store may bear little resemblance actual sub ject Especially difficult photograph aircraft displayed museums lit fluor escent lights have discovered satis factory filter correct colors either daylight tungsten film used under fluo rescent lighting find own flash unit acceptable form lighting museum subject photographic presen tation used document sub ject recommend give judges minimum number pictures show major features prototype show close-ups details sure same details appear model An other reason build large scale details such venturis navigation lights fairings etc easier build large final note Take helper first scale contest Ill guarantee hands will shaking like yours product review product review product review flight line always start first flip engine wont give hint pop Count everything going wrong contest mind work out ahead time helper responsible what you will automatically prepared M acchi/Berliner continued page 52 tional ideas pretty well taken practical limits turn stretched out development period far beyond 1931 Schneider allowed British win opposition retire trophy lobby Royal Aero Club London Italians following route others attacking 3-km world speed record own ways Across Atlantic America mili tary pulled out speed race leav ing wide open civilians meant marvelous home-made machines thrilling nation National Air Races Craft like barrel-shaped GeeBee conventional Wedell Williams straining poor little hearts out trying hit 300 mph Shell Speed Dash small-time stuff men thinking terms 400 mph seaplanes 1000-hp P&W Wasps American racing scene excited mere toys compared Rolls Royce Fiat engines European counterparts using obviously needed reach strange new world 400 mph two basic routes could followed greater speed Radical air frames radical powerplants clear some major changes would have made Italians ever beat 358 mph 1900-hp Supermarine Radical racers never very suc cessful past still arent 1929 Piaggio Pc7 racer might have real record-breaker its retractable hydrofoils place pontoons never flew contemporary Savoia Marchetti 565 twin-boom affair 1000-hp engines either end central pod never de-bugged enough show its potential Still idea two engines fuse lage appealed Macchi works way combine greatly increased power limited drag singleengined airplane Together Fiat Company built type AS5 engine used previous successful seaplane racers Macchi created ultimate watercraft Macchi-Castoldi MC72 Aerodynamically just same philosophy Macchi done well past long thin fuselage minimum wings tiny windshield huge pontoons neatly faired struts sup porting powerplant another kettle fish 102 Model Aviation MR MODELER manufacture special ized accessories make R/C modeling easier never out stock items manufacture Seeyour deal er send first class stamp catalog sheets listing over 70 items complete pictures prices OVER 12 YEARS SERVICE FUEL IT FLIT IT N GO _ Other Davis Diesel Produc5a 0-Varnishing Brushes 020-60 0 Fuel Bulbs land 2 oz 1/2A Fuel Line Asst 1/4 l/2A Twin Exhaust Stax Send SASE literature - Deelee inquiries invited DIESEL CONVERTERS $995 Up 50% power 50% economy glow new fuel formula Fuel. Pt $350 Qt $500 $100 P & H f5iAsk/o ur dealer add $150 p&h L.J order direct Co nn Res add ST Davis Diesel Dewlopment Inc BOX 141 DEPT E MILFORD CT 06460 PHONE 203 877-1670 product review product review product review Prop Balancer have ever rigged pair razor blades mandrel balancing propellers welcome gadget Handy use allows balancing prop across short axis well usual long axis Can carried handily pocket use cap ends unscrewed cartridge-like case pin base set flat level surface cone piece threaded prop hole per instructions prop placed pin check balance Price $295 Du-Bro Products Inc 480 Bonner Rd Wauconda IL 60084 Basically two AS5s linked gether back-to-front crankcase two V-12s two entirely separate crankshafts revolving opposite directions geared propeller drive shaft located between cylinder banks forward 'engine~ drive shafts telescoped drove two-bladed prop revolved opposite directions thus comprising first contra-rotating propellers ever stalled airplane obvious external dif ferencetwo props centerlineand also clue biggest reason MC72 superior come before did permit full power 50-liter 3100 cu engine used eliminated awful effects torque caused other powerful racing seaplanes dig pon toon deep water power applied great sounding idea dif ferent enough men created along siege teething troubles supercharger fed both engines least successful part entire operation according Dr Vandone engineer charge development Fiat Its efficiency low 1931 rotor-shaft bearings problem friction clutch small compact either worked too well correct clutch slippage high speed different discs tried along kinds teeth pinion major problems faced men wanted go faster anyone else cooling engine fat radial stuck right out front wind could get no great challenge airplane in-line engine tightly cowled reduce drag cooling came very big headache Ordinary water wasnt up task keeping racing engine melting high rpm since ethylene-glycol just being developed USA wasnt available first Italians went another technique Skin sur face radiators far area could possibly achieved ordinary flow-through radiators managed keep temperature down manage able level long enough set speed records system no value mili tary commercial planes worked well enough short blast idea used effectively Curtiss Racers 1920s later used special Messerschmitt set landplane record 1939 soon faded out wings struts floats tail MC72 covered skin radi ators water oil no way increase cooling area relatively new ethylene-glycol tried coolant found unsatis factory installation Heat problems showed up first valves dif LJLJ r ~1 Fren PEA NO PEDPLE QUALITY KIT DESIGNED ESPECIALLY FOR THE NEW MINIATURE RADIOS L BUT EASY TO FLY SPECIFICATIONS WINGSPAN 25 INCHES POWER 020 GAS ENGINE RADIO MINIATURE 2-3 CHANNEL FLYING WT R TO 10 OZ KIT INCLUDES CUT BALSA AND PLYWOOD FORMED LANDING GEAR & CANOPY HARDWARE FOR CONTROLS KIT $1495 ASK AT YOUR LOCAL DEALER IF NOT AVAILABLE ORDER DIRECT ADD 75g PEANUT SCALE KITS AND HARD TO FIND ITEMSBROWN CO-2 ENGINES COMPLETE CATALOG 5O Peck.PeIvmesP 0 BOX 2498 -AMLA MESA CALIF 92041 WPHONE 17141 469-8675 1714 442-46362 ferent techniques tried cooling Small improvements made until cylinder heads redesigned did valves cool properly During tests 1000 valves made 12 different sets valve-springs-and-cam shafts tried test engines tests ran April June 1931 leaving just over two months until Schneider Trophy Race still problems ignition supply fuel-air mixture getting cylinders tests changes tests first AS6 engines fly MC72 left water June 22 low-com pression version final engine devel oping 2300 hp against hopedfor 3000 hp competition far ready back-fired first flight trouble its fuel pumps ran hot something wrong wires bracing wings too Any hope getting England Schnei der gone attention switched get ting three airplanes ready attack world speed record especially view events other countries new Supermarine S6B came through classy win final Schneider Race 340 mph wiped out absolute record 358 mph slashing 407 mph February 1932 MC72 its radical engine finally passed official Italian Government tests required five passes over simulated speed course high power British meanwhile decided let things go figuring 407 mph British airplane could possibly achieve until 1938 would begin think seriously about getting back race Cleveland 1932 Doolittle increased landplane record 294 mph GeeBee R-l Super Sportster unknow ingly demonstrated just far US behind Half year later usually quiet lake edge Italian Alps MC72 began show its stuff Piloted Warrant Officer Francesco Agello MC72s 2800-hp Fiat AS6 engine showed world indeed worth trouble four passes over 3-km course Lake Garda near Desenzano Agello averaged 42377 mph first three nearly-identical air planes serial-numbered 179 almost 50% faster fastest Ameri can airplane fastest landplane world come October Casinelli used same air plane set world speed record 100-km closed circuit 391 mph later same month third pilot Italian High-Speed Flight Scapinelli used #180 win first Coupe Bleriot aver aging 385 mph half hour Intended replacement Schnei der Bleriot Cup years fastest flight least 30 minutes go permanently first pilot averaged over 1000 kph 621 mph half hour pipe-dream time praiseworthy achievements MC72 attracted great acclaim Italian Air Force especially bombastic II DuceItalys dictator Benito Mussolini applause also went Gen Italo Balbo commander Regia Aeronautica later die under mys terious circumstances after running afoul Mussolini well Macchi Fiat directly respon sible splendid demonstration great extent Fascist politicians received greatest bene fit non-political cheers friends future foes alike somewhere along line Fascists screwed things up never officially admitted understandably solid reason believe civilian test pilot Simeone Marsone actually flew MC72 fastest Mussolini wanted credit go Air Force times never submitted FAI According very good source Marsone clocked amazing 475 mph sometime 1934 As 424-mph mark lasted year half Oct 23 1934 Fran cesco Agello again climbed MC72 prepared let er rip over Lake Garda time however #181 January1978 103 1/3 SIZE SR FALCON M kII LIBERTY BELL MODEL No 101 No 103 No104 No112 No118 No121 No 123 No124 No 125 No 131 No134 No 136 No 141 No146 No147 No149 No 151 No153 No165 No159 No 164 No165 No166 No168 No169 No 172 No 174 No 176 No177 No 178 No 160 No181 No183 No 184 No185 No186 No187 No188 No189 No 190 No191 No192 No193 No194 No195 No196 No197 No 198 No 199 No200 No201 No 202 No 203 No204 No205 No 206 No 207 No 208 FULLSIZE PLANS No 209 Seastrutz$450 RC bipe 3 channels 19 wheels pontoons No 210 Simplex$450 FF years development contest wns049/051 No211 Together IV$375 CL Somewhat large impressive stuntor 46 Consistent winner Short Seamew 40-powered Class Carrier model good prototype lends itself innovations $300 Kloud King 15-19 AC Old-Timer Free Flight based upon 1938 record breaker FF $400 Wiley Post Biplane Petite durable scale design forsither rubber tail wagger pulse rudder $225 Sneat Sport AC glider simple job thet can flown engine $275 GollyGeeWhz Dan Rutherfords simple Half-A powered Combat job turns dime $150 Gremlin Sturdy acrobatic AC biplane flies well 35s up 80s $300 4-Bits 40-powered AC 600 Club Racer has winning ways Good sport too $400 Semi-Pm Contest-winning HI glider hess pop-up tail dethermalizer $100 IlaIf-Korda rubber John Oldenkamps 112-size all-balsa Old-Timer $1 76 Gee Bee Model Y 40-powered AC stand-off scale great old-time racers. *600 Celliato superb Standard Class AC sailplane also took Nats first $400 Flaselar $torch AC scale model 23-45 5-channel has both slots flaps $400 Blackburn Monoplane AC Scale rendition history-maker wheels floats 40 engine $480 QuickSilver AC 1/2A Pylon Racer incorporates latest techniques $200 8-1 AC 15 USAF bomber full house Ace foam wings Stable $275 Comedian AC fun-fly acrobatic biplane good looker 40 80 $400 Nesmith Cougar FF rubber scale 30-in span Excellent design long flights $300 Cerberua AC 50-powered Pattern job retracts advanced features $475 Tellipsoar AC Standard Class sailplane wins stand-cdt performance $1000 Tercal Keith Trostlas /2A Cl Stunt ship flies excellent pattern $200 Pogo AC Formula Pylon racer deBolt based full-scale Owl $750 Midget Mustang CL 1975-1976 Nats winning Goodyear byJohn Ballard $200 Nothing Fancy AC biplane 35 engines pretty handles beautifully $825 Simiter AC apectaculer flying-wing 15 fin-mounted tractor $300 Dennyplane AC version famed cabin model kit 193719-25 $400 Tutorn AC Cabin model scale-like performance 25-35 $325 Iron Dog AC Quarter Midget Bell Airacobra has won Pylon contests $400 Qua dCoupe rubber power $his attraqtive Coupe has excellent performance $300 Zonker AC canard hastltt5fllIItii~r 40 power$300 Country Boy FF JirnCteriv thbrougbbred/09/5 1 1/2A $300 Bristol Scout AC 02 power scale pulse rudder small radios $200 Bed Chock Charlie AC Scale model Russian PT trainer 09/15 $300 Answer AC FF cabin 02 sized Replica Old-Timer $175 SevIlle AC Sport low-wing sailplane 80 wing has excellent performance $350 Chester Slow CL Slow Combat model Dan Rutherford frequent winner $275 Fancy Pants AC Sport/Aerobatic low-wing has ply-skin fuselage 25s 45s $480 BiVSoy FF Unlimited Class rubber model no frills great performer $300 Rockette FF model Jetex-type power isa Nationals winner $150 Vintage 11 AC Antique type old-time open fuse construction 60 $475 Snake CL Rat racerby Dick Lambartlatest state art $200 Mountaineer AC Slope Soarer Clarence Haughtgood can get $375 Chipmunk AC Scale winner 1976 World Championships Nets $900 Stiletto CL stunt model McDonald winner 1976 FAI World Champs $375 Vol Ubre FF rubber-powered Wakefield Bob White Great winner $275 Hats Biplane AC aerobatic scale job takes 40/50 built-in muffler $475 Mirage Sharwood Buckataffs Fast Combattwice Nats winner $250 Fokker T-2 Nets winning FF scale electric poweredAstro 02 etc $275 Sporteter AC deBolt wing choice aerobatics/racing *375 P3 AC Cox 09 Ace foam wings step up 049 jobs $350 Ole Reliable CL Formula 40 speed job Snyders Nets winner $175 Roll Out FF hand-launch glider has pop-up dethermalizer $100 Avenger CL profile 049 uses sheet wing maneuverable $160 PokkerDVIII AC 45 60 Two sheets 2-1/2 scale $900 Cardboard Douglas M-2 CL 50 biplane 40power less $10 expense $600 Rock AC aerobatics 19-40 engines Simple tail-dragger $360 Air Camper FF Pisetanpol 1/2A Charming old-timer 2-sheets $300 Uvesay DL 5 AC English honiebuilt 3-clmen. 16s Exotic easy Good flier $500 Swinger CL 1 /2A all-balsa swing-wing Fly fun use experiments $2 00 Circle numbers plans wish order 104112118121 147149151153 174176177178 189190191192 201202203204 Please print carefully 101 103 123124125131134136141146 155159164165166168169172 180181183184185186187188 193194195196197198199200 205206207208209210211 Enclosed $ NAME CITY 710 STATE Price includes first-class postage Send check money order payable ModelAviation AMA 815 Fifteenth St. NW Washington DC 20005 smaller lighter floats engine up its full 3100 hp about 200 hp absorbed supercharger times 3-km dashes 1529 sec 1519 sec 1518 sec 1523 sec speed figured out 440677 mph far short 475 mph may have achieved civilian filed accepted FAI remains almost 43 years later highest official speed ever attained prop-driven seaplane 41/2 years after Agello set MC72s record remained absolute world mark airplanes types until Hans Dieterle flew 464 mph pro totype Heinkel He-l00 did landplane fly faster greatest racing seaplanes World War II understandably tough military racing airplanes He-l00 ferocious Me-209 barely beat its record few days later both inno cent victims Allied bombing raids fuselage Me-209 remains Polish museum final record-holding Macchi-Castoldi 72 however managed get through some very trying years Today #181 Caproni Aeronautical Muse um Milan Italy looking beautiful powerful unbelievably fast did 1934 caused aviation world shake its head wonder Editors Note press time information received source expert MC 72 aircraft two ships also lost training ADVERTISERS INDEX Ace Radio Control ndrews Aircraft Model Co ove rite28 94 Cox Hobbies Inc15 Davis Diesel Development102 Du-Bro Products3 EK-Logictrol7 Flyline Models96 Fox Mfg Company7 Carl Goldberg Models20 Grish Brothers88 Helmut Bernhardt99 Hobby Hideaway100 Hobbypoxy91 K&B Mfg85 Kraft Great Lakes Inc97 Midwest Model Products6 Morrison Repla-Tech100 Pactra Industries83 Peck-Polymers103 Progress Mfg Company86 Pylon Publications92 R/C Buyers Guide93 Rocket City Specialties102 Sig Mfg Company1 Sterling Models Inc5 Tatone Products Inc87 Top Flite Models Inc81 Westport International89 Williams Brothers90 World EnginesBack Cover 104 Model Aviation
Edition: Model Aviation - 1978/01
Page Numbers: 49, 50, 51, 52, 102, 103, 104
Hanging Caproni Aeronautical Museum Milan Italy torys memorable flying machines 3100-hp seaplane set absolute speed record 440677 mph Far faster landplane its day tandem-engined marvel clocked unoffi cially 475 mph 1934 still holds speed record seaplanes U Don Berliner FOR DOZEN YEARS Lind berghs transatlantic flight until World War II about begin fastest air planes world seaplanes GeeBee racers jazzy little Army Air Corps pursuits special experimental craft water-borne machines huge Top Two three MC 72s built 1931 Schneider Trophy Race Late 1932 No 180 flown three different pilots averaged 42377 mph over 3-km course set closed-circuit mark 391 mph over 100-km course won First Bleriot Cup averaging 385 mph half hour Cowl removed ship foreground reveals huge 24-cylinder Fiat en gineactually two AS 6 racing engines back back single crankcase Above rest water No 181 shows advantage contra-rotating props some skin radiators covered wings fuselage sides floats wide float struts January1978 49 NOrE THAT TAPER IN WING THICKNESS BEGINS AT SECTION Wi SEE PLAN PEAT SIDES FRQI HERE APT Drawings byJ H Robinson MODEL AV/AION SCALE f-O MACCH MC 72 0153 50 Model Aviation OLJRAL PANEL ON UNDERSIDE ONLY F-8 TYPICAL SECTION STRUT SECTION COLOURS OVERALL -- CRIMSON COOLANT & _ _ -BRASS OIL RADIATORS FLOAT UNOERSIDES TAIL LEGEND FTC SPINNERS PROPELLERSNATURAL WINGTIPS METAL AILERONS BRACING RUDDER AR/GI-IT GREEN STRIPING WI/lit SCARLET CARBURETTOR Il-ifAKE BLACK INSPECTION DOORS DURAL TO OIL COOLER --V THIS DRAWING SHOWS 107 AT THE 7934 PARIS SALON FOLLOWING THE RECORD QF 23-70 - PRESENT NODII7CA TIONS INCILIDE SHORTENED UNDER-FIN 0 MINOR CHANGES 70 PAINT FINISH 779 0 TAO WERE FITTED WITH LONGER FLOATS 0 VENTRAL COOLANT RADIATOR BUT OlD NOT ORIGINALLY HAVE EITHER THE EXTENDED UNDER FIN OR TUNNEL CARBURETTOR INTAKE 1SF t 21 T2 Wt TYPICAL SECT/ON EXTENDS TO ROOT 7 TB INCIDENCE IS CONSTANT s-ITYPICAL SECTION SIDES OF ELEVATORS ARE FLAT F 5 v ~F F F 5 DA TA 949On WING CHORD7-73O WiNG AREA NETT OVERALL LENGTH0610 , FUSELAGE LENGTHS* --- 0350 m FLOAT LENGTH** _ _ 6575 _ FLOAT TRACK2700, STABILIZER SPANS2920, PROPELLER 0/AMS59O EMPTY WEIGHT2500kg LOADED WEIGHT - -2 907kg *INCLUD/NG EXTENDED UNDER-FIN **EXCLUO/NG MOORING RINGS F-b 3I 11 5-W /67 /52 274 a- IOt5 9-7~ a- 6 s S2 Ii 64/0 II F-It R-I F8 7 I-I IT LEGEND January 1978 51 F-JF-4F-SF-6F-6A IF 11 [ U-ULJ jJ worked Telescoped propeller shafts passed between cylinder banks forward unit shaft driven via gear train engine Super charger aft end fed both units consumed 200 hp 3100 hp developed Photographs T C Weaver collection pontoons hanging below seeming contradiction known about streamlining two main reasons Schneider Trophy become politically important governments willing spend vast amounts money develop unlimited racing seaplanes demonstration technol ogy two Only endless water run ways long enough airplanes small high-speed wings take off days wide 10000-ft concrete strips 747s far future get off water penalty paid form pontoons sight two devices almost large fuselage hanging belly strikes terror heart modern designer helped considerably hurt several years during reign seaplane worlds fastest landplane 100 mph slower best its water cousins Thanks impetus magnifi cent Schneider Trophy US start ed trend series C irtiss military racers led ultii sleek two-wingers d Pulitzer Schneider rt 1920s bringing fame si Doolittle Curtiss R2 play National Air & S no matter sI can t answer 1 lems speed s parts struts holding double needed wing-ft course silly seco did offer advantages re improvements metals design about spell th plane race all-out s first turn theory Italians start c become historic series planes Macchi woi 1926 great extent Curtiss racer place ti its struts few iate biplanes minated es mid ch Jimmy -2 dis ace Museum e biplanes Itimate prob uck too n extra wing elage joints d wing uced weight md structural end bi eed reality what f racing seacs M39 monoplane e upper wing lim wires brace thin single wing placed low Curtiss-like fuselage Mario de Bernardi pilot three M39s won 1926 Schneider 264 mph barely 12 mph slower absolute world speed record set straight-away course French Ferbois landplane 1924 following year another name des tined glory added records Supermarine S5 piloted S N Webster won 1927 Schneider world record pace 282 mph though no official record set Little month later deBernardi again time new Macchi M52s failed finish 1927 Schneider speed 29782 mph first true absolute world speed record set sea plane 1928 mark composed four passes over 3-km/l86-mi course raised 31846 mph deBernardi clipped-wing version M52 worlds fastest landplane now 50 mph behind times fading fast British returned vengeance Waghorn won 1929 Schneider Race new Supermarine S6 329 mph Orlebar set world 3-km record 3577 mph same machine few days later Italians seen handwriting wall surren dered genius R J Mitchell soon create immortal Spitfire out seaplane experience yet Macchi developed M67 power up M52s 1000-hp Fiat 1400 hp 18-cylinder threebank Isotta Fraschini come naught M67s crashed test flight other two failed finish 1929 Schneider Race Well aware 1931 Schneider would last long impor tant series British succeeded win ning third straight time men Macchi set work create clean est powerful airplane world ever seen achieve go radical design since conven Continued page 102 52 Model Aviation ground crew swarms over o 1 1 just betore averaged 4411577 tour dashes over 3km course 19344-1/2 years later its mark fell landplanethe Heinkel He100 464 mph will score high am static judg ing scale contest entries start maxmum points As see omitted details incorrect color markings points start deducted errors see between scale documentation model less will final static score So sure add obvi ous features show documen tation brings us subject proofof-scale documentation absence scale documentation part sev eral contestants recent scale contest made think article might some use would surprised times someone will enter con test just see model will rank against fellow modelers However same contestants will 3-view drawing will have nothing show chosen color scheme did exist full scale aircraft Without vital pieces paper judges can award craftsmanship points since can score maximum 30 points chances placing will dim Very few aircraft available model kits have subject magazine article book Model magazines constantly featuring articles about full-scale aircraft usually clude both 3-views photographs Color pictures less likely found mag azines books excep tions best proof scale source full-scale aircraft itself should present no problems Piper Cub some other aircraft proliferates local airport B-17 however likely found locally unless live Har lingen Texashome Confederate Air Force have access full-scale aircraft afternoon camera should produce necessary docu mentdtion Beware however poor film exposure discount processing colors print taken family instant camera developed local drug store may bear little resemblance actual sub ject Especially difficult photograph aircraft displayed museums lit fluor escent lights have discovered satis factory filter correct colors either daylight tungsten film used under fluo rescent lighting find own flash unit acceptable form lighting museum subject photographic presen tation used document sub ject recommend give judges minimum number pictures show major features prototype show close-ups details sure same details appear model An other reason build large scale details such venturis navigation lights fairings etc easier build large final note Take helper first scale contest Ill guarantee hands will shaking like yours product review product review product review flight line always start first flip engine wont give hint pop Count everything going wrong contest mind work out ahead time helper responsible what you will automatically prepared M acchi/Berliner continued page 52 tional ideas pretty well taken practical limits turn stretched out development period far beyond 1931 Schneider allowed British win opposition retire trophy lobby Royal Aero Club London Italians following route others attacking 3-km world speed record own ways Across Atlantic America mili tary pulled out speed race leav ing wide open civilians meant marvelous home-made machines thrilling nation National Air Races Craft like barrel-shaped GeeBee conventional Wedell Williams straining poor little hearts out trying hit 300 mph Shell Speed Dash small-time stuff men thinking terms 400 mph seaplanes 1000-hp P&W Wasps American racing scene excited mere toys compared Rolls Royce Fiat engines European counterparts using obviously needed reach strange new world 400 mph two basic routes could followed greater speed Radical air frames radical powerplants clear some major changes would have made Italians ever beat 358 mph 1900-hp Supermarine Radical racers never very suc cessful past still arent 1929 Piaggio Pc7 racer might have real record-breaker its retractable hydrofoils place pontoons never flew contemporary Savoia Marchetti 565 twin-boom affair 1000-hp engines either end central pod never de-bugged enough show its potential Still idea two engines fuse lage appealed Macchi works way combine greatly increased power limited drag singleengined airplane Together Fiat Company built type AS5 engine used previous successful seaplane racers Macchi created ultimate watercraft Macchi-Castoldi MC72 Aerodynamically just same philosophy Macchi done well past long thin fuselage minimum wings tiny windshield huge pontoons neatly faired struts sup porting powerplant another kettle fish 102 Model Aviation MR MODELER manufacture special ized accessories make R/C modeling easier never out stock items manufacture Seeyour deal er send first class stamp catalog sheets listing over 70 items complete pictures prices OVER 12 YEARS SERVICE FUEL IT FLIT IT N GO _ Other Davis Diesel Produc5a 0-Varnishing Brushes 020-60 0 Fuel Bulbs land 2 oz 1/2A Fuel Line Asst 1/4 l/2A Twin Exhaust Stax Send SASE literature - Deelee inquiries invited DIESEL CONVERTERS $995 Up 50% power 50% economy glow new fuel formula Fuel. Pt $350 Qt $500 $100 P & H f5iAsk/o ur dealer add $150 p&h L.J order direct Co nn Res add ST Davis Diesel Dewlopment Inc BOX 141 DEPT E MILFORD CT 06460 PHONE 203 877-1670 product review product review product review Prop Balancer have ever rigged pair razor blades mandrel balancing propellers welcome gadget Handy use allows balancing prop across short axis well usual long axis Can carried handily pocket use cap ends unscrewed cartridge-like case pin base set flat level surface cone piece threaded prop hole per instructions prop placed pin check balance Price $295 Du-Bro Products Inc 480 Bonner Rd Wauconda IL 60084 Basically two AS5s linked gether back-to-front crankcase two V-12s two entirely separate crankshafts revolving opposite directions geared propeller drive shaft located between cylinder banks forward 'engine~ drive shafts telescoped drove two-bladed prop revolved opposite directions thus comprising first contra-rotating propellers ever stalled airplane obvious external dif ferencetwo props centerlineand also clue biggest reason MC72 superior come before did permit full power 50-liter 3100 cu engine used eliminated awful effects torque caused other powerful racing seaplanes dig pon toon deep water power applied great sounding idea dif ferent enough men created along siege teething troubles supercharger fed both engines least successful part entire operation according Dr Vandone engineer charge development Fiat Its efficiency low 1931 rotor-shaft bearings problem friction clutch small compact either worked too well correct clutch slippage high speed different discs tried along kinds teeth pinion major problems faced men wanted go faster anyone else cooling engine fat radial stuck right out front wind could get no great challenge airplane in-line engine tightly cowled reduce drag cooling came very big headache Ordinary water wasnt up task keeping racing engine melting high rpm since ethylene-glycol just being developed USA wasnt available first Italians went another technique Skin sur face radiators far area could possibly achieved ordinary flow-through radiators managed keep temperature down manage able level long enough set speed records system no value mili tary commercial planes worked well enough short blast idea used effectively Curtiss Racers 1920s later used special Messerschmitt set landplane record 1939 soon faded out wings struts floats tail MC72 covered skin radi ators water oil no way increase cooling area relatively new ethylene-glycol tried coolant found unsatis factory installation Heat problems showed up first valves dif LJLJ r ~1 Fren PEA NO PEDPLE QUALITY KIT DESIGNED ESPECIALLY FOR THE NEW MINIATURE RADIOS L BUT EASY TO FLY SPECIFICATIONS WINGSPAN 25 INCHES POWER 020 GAS ENGINE RADIO MINIATURE 2-3 CHANNEL FLYING WT R TO 10 OZ KIT INCLUDES CUT BALSA AND PLYWOOD FORMED LANDING GEAR & CANOPY HARDWARE FOR CONTROLS KIT $1495 ASK AT YOUR LOCAL DEALER IF NOT AVAILABLE ORDER DIRECT ADD 75g PEANUT SCALE KITS AND HARD TO FIND ITEMSBROWN CO-2 ENGINES COMPLETE CATALOG 5O Peck.PeIvmesP 0 BOX 2498 -AMLA MESA CALIF 92041 WPHONE 17141 469-8675 1714 442-46362 ferent techniques tried cooling Small improvements made until cylinder heads redesigned did valves cool properly During tests 1000 valves made 12 different sets valve-springs-and-cam shafts tried test engines tests ran April June 1931 leaving just over two months until Schneider Trophy Race still problems ignition supply fuel-air mixture getting cylinders tests changes tests first AS6 engines fly MC72 left water June 22 low-com pression version final engine devel oping 2300 hp against hopedfor 3000 hp competition far ready back-fired first flight trouble its fuel pumps ran hot something wrong wires bracing wings too Any hope getting England Schnei der gone attention switched get ting three airplanes ready attack world speed record especially view events other countries new Supermarine S6B came through classy win final Schneider Race 340 mph wiped out absolute record 358 mph slashing 407 mph February 1932 MC72 its radical engine finally passed official Italian Government tests required five passes over simulated speed course high power British meanwhile decided let things go figuring 407 mph British airplane could possibly achieve until 1938 would begin think seriously about getting back race Cleveland 1932 Doolittle increased landplane record 294 mph GeeBee R-l Super Sportster unknow ingly demonstrated just far US behind Half year later usually quiet lake edge Italian Alps MC72 began show its stuff Piloted Warrant Officer Francesco Agello MC72s 2800-hp Fiat AS6 engine showed world indeed worth trouble four passes over 3-km course Lake Garda near Desenzano Agello averaged 42377 mph first three nearly-identical air planes serial-numbered 179 almost 50% faster fastest Ameri can airplane fastest landplane world come October Casinelli used same air plane set world speed record 100-km closed circuit 391 mph later same month third pilot Italian High-Speed Flight Scapinelli used #180 win first Coupe Bleriot aver aging 385 mph half hour Intended replacement Schnei der Bleriot Cup years fastest flight least 30 minutes go permanently first pilot averaged over 1000 kph 621 mph half hour pipe-dream time praiseworthy achievements MC72 attracted great acclaim Italian Air Force especially bombastic II DuceItalys dictator Benito Mussolini applause also went Gen Italo Balbo commander Regia Aeronautica later die under mys terious circumstances after running afoul Mussolini well Macchi Fiat directly respon sible splendid demonstration great extent Fascist politicians received greatest bene fit non-political cheers friends future foes alike somewhere along line Fascists screwed things up never officially admitted understandably solid reason believe civilian test pilot Simeone Marsone actually flew MC72 fastest Mussolini wanted credit go Air Force times never submitted FAI According very good source Marsone clocked amazing 475 mph sometime 1934 As 424-mph mark lasted year half Oct 23 1934 Fran cesco Agello again climbed MC72 prepared let er rip over Lake Garda time however #181 January1978 103 1/3 SIZE SR FALCON M kII LIBERTY BELL MODEL No 101 No 103 No104 No112 No118 No121 No 123 No124 No 125 No 131 No134 No 136 No 141 No146 No147 No149 No 151 No153 No165 No159 No 164 No165 No166 No168 No169 No 172 No 174 No 176 No177 No 178 No 160 No181 No183 No 184 No185 No186 No187 No188 No189 No 190 No191 No192 No193 No194 No195 No196 No197 No 198 No 199 No200 No201 No 202 No 203 No204 No205 No 206 No 207 No 208 FULLSIZE PLANS No 209 Seastrutz$450 RC bipe 3 channels 19 wheels pontoons No 210 Simplex$450 FF years development contest wns049/051 No211 Together IV$375 CL Somewhat large impressive stuntor 46 Consistent winner Short Seamew 40-powered Class Carrier model good prototype lends itself innovations $300 Kloud King 15-19 AC Old-Timer Free Flight based upon 1938 record breaker FF $400 Wiley Post Biplane Petite durable scale design forsither rubber tail wagger pulse rudder $225 Sneat Sport AC glider simple job thet can flown engine $275 GollyGeeWhz Dan Rutherfords simple Half-A powered Combat job turns dime $150 Gremlin Sturdy acrobatic AC biplane flies well 35s up 80s $300 4-Bits 40-powered AC 600 Club Racer has winning ways Good sport too $400 Semi-Pm Contest-winning HI glider hess pop-up tail dethermalizer $100 IlaIf-Korda rubber John Oldenkamps 112-size all-balsa Old-Timer $1 76 Gee Bee Model Y 40-powered AC stand-off scale great old-time racers. *600 Celliato superb Standard Class AC sailplane also took Nats first $400 Flaselar $torch AC scale model 23-45 5-channel has both slots flaps $400 Blackburn Monoplane AC Scale rendition history-maker wheels floats 40 engine $480 QuickSilver AC 1/2A Pylon Racer incorporates latest techniques $200 8-1 AC 15 USAF bomber full house Ace foam wings Stable $275 Comedian AC fun-fly acrobatic biplane good looker 40 80 $400 Nesmith Cougar FF rubber scale 30-in span Excellent design long flights $300 Cerberua AC 50-powered Pattern job retracts advanced features $475 Tellipsoar AC Standard Class sailplane wins stand-cdt performance $1000 Tercal Keith Trostlas /2A Cl Stunt ship flies excellent pattern $200 Pogo AC Formula Pylon racer deBolt based full-scale Owl $750 Midget Mustang CL 1975-1976 Nats winning Goodyear byJohn Ballard $200 Nothing Fancy AC biplane 35 engines pretty handles beautifully $825 Simiter AC apectaculer flying-wing 15 fin-mounted tractor $300 Dennyplane AC version famed cabin model kit 193719-25 $400 Tutorn AC Cabin model scale-like performance 25-35 $325 Iron Dog AC Quarter Midget Bell Airacobra has won Pylon contests $400 Qua dCoupe rubber power $his attraqtive Coupe has excellent performance $300 Zonker AC canard hastltt5fllIItii~r 40 power$300 Country Boy FF JirnCteriv thbrougbbred/09/5 1 1/2A $300 Bristol Scout AC 02 power scale pulse rudder small radios $200 Bed Chock Charlie AC Scale model Russian PT trainer 09/15 $300 Answer AC FF cabin 02 sized Replica Old-Timer $175 SevIlle AC Sport low-wing sailplane 80 wing has excellent performance $350 Chester Slow CL Slow Combat model Dan Rutherford frequent winner $275 Fancy Pants AC Sport/Aerobatic low-wing has ply-skin fuselage 25s 45s $480 BiVSoy FF Unlimited Class rubber model no frills great performer $300 Rockette FF model Jetex-type power isa Nationals winner $150 Vintage 11 AC Antique type old-time open fuse construction 60 $475 Snake CL Rat racerby Dick Lambartlatest state art $200 Mountaineer AC Slope Soarer Clarence Haughtgood can get $375 Chipmunk AC Scale winner 1976 World Championships Nets $900 Stiletto CL stunt model McDonald winner 1976 FAI World Champs $375 Vol Ubre FF rubber-powered Wakefield Bob White Great winner $275 Hats Biplane AC aerobatic scale job takes 40/50 built-in muffler $475 Mirage Sharwood Buckataffs Fast Combattwice Nats winner $250 Fokker T-2 Nets winning FF scale electric poweredAstro 02 etc $275 Sporteter AC deBolt wing choice aerobatics/racing *375 P3 AC Cox 09 Ace foam wings step up 049 jobs $350 Ole Reliable CL Formula 40 speed job Snyders Nets winner $175 Roll Out FF hand-launch glider has pop-up dethermalizer $100 Avenger CL profile 049 uses sheet wing maneuverable $160 PokkerDVIII AC 45 60 Two sheets 2-1/2 scale $900 Cardboard Douglas M-2 CL 50 biplane 40power less $10 expense $600 Rock AC aerobatics 19-40 engines Simple tail-dragger $360 Air Camper FF Pisetanpol 1/2A Charming old-timer 2-sheets $300 Uvesay DL 5 AC English honiebuilt 3-clmen. 16s Exotic easy Good flier $500 Swinger CL 1 /2A all-balsa swing-wing Fly fun use experiments $2 00 Circle numbers plans wish order 104112118121 147149151153 174176177178 189190191192 201202203204 Please print carefully 101 103 123124125131134136141146 155159164165166168169172 180181183184185186187188 193194195196197198199200 205206207208209210211 Enclosed $ NAME CITY 710 STATE Price includes first-class postage Send check money order payable ModelAviation AMA 815 Fifteenth St. NW Washington DC 20005 smaller lighter floats engine up its full 3100 hp about 200 hp absorbed supercharger times 3-km dashes 1529 sec 1519 sec 1518 sec 1523 sec speed figured out 440677 mph far short 475 mph may have achieved civilian filed accepted FAI remains almost 43 years later highest official speed ever attained prop-driven seaplane 41/2 years after Agello set MC72s record remained absolute world mark airplanes types until Hans Dieterle flew 464 mph pro totype Heinkel He-l00 did landplane fly faster greatest racing seaplanes World War II understandably tough military racing airplanes He-l00 ferocious Me-209 barely beat its record few days later both inno cent victims Allied bombing raids fuselage Me-209 remains Polish museum final record-holding Macchi-Castoldi 72 however managed get through some very trying years Today #181 Caproni Aeronautical Muse um Milan Italy looking beautiful powerful unbelievably fast did 1934 caused aviation world shake its head wonder Editors Note press time information received source expert MC 72 aircraft two ships also lost training ADVERTISERS INDEX Ace Radio Control ndrews Aircraft Model Co ove rite28 94 Cox Hobbies Inc15 Davis Diesel Development102 Du-Bro Products3 EK-Logictrol7 Flyline Models96 Fox Mfg Company7 Carl Goldberg Models20 Grish Brothers88 Helmut Bernhardt99 Hobby Hideaway100 Hobbypoxy91 K&B Mfg85 Kraft Great Lakes Inc97 Midwest Model Products6 Morrison Repla-Tech100 Pactra Industries83 Peck-Polymers103 Progress Mfg Company86 Pylon Publications92 R/C Buyers Guide93 Rocket City Specialties102 Sig Mfg Company1 Sterling Models Inc5 Tatone Products Inc87 Top Flite Models Inc81 Westport International89 Williams Brothers90 World EnginesBack Cover 104 Model Aviation
Edition: Model Aviation - 1978/01
Page Numbers: 49, 50, 51, 52, 102, 103, 104
Hanging Caproni Aeronautical Museum Milan Italy torys memorable flying machines 3100-hp seaplane set absolute speed record 440677 mph Far faster landplane its day tandem-engined marvel clocked unoffi cially 475 mph 1934 still holds speed record seaplanes U Don Berliner FOR DOZEN YEARS Lind berghs transatlantic flight until World War II about begin fastest air planes world seaplanes GeeBee racers jazzy little Army Air Corps pursuits special experimental craft water-borne machines huge Top Two three MC 72s built 1931 Schneider Trophy Race Late 1932 No 180 flown three different pilots averaged 42377 mph over 3-km course set closed-circuit mark 391 mph over 100-km course won First Bleriot Cup averaging 385 mph half hour Cowl removed ship foreground reveals huge 24-cylinder Fiat en gineactually two AS 6 racing engines back back single crankcase Above rest water No 181 shows advantage contra-rotating props some skin radiators covered wings fuselage sides floats wide float struts January1978 49 NOrE THAT TAPER IN WING THICKNESS BEGINS AT SECTION Wi SEE PLAN PEAT SIDES FRQI HERE APT Drawings byJ H Robinson MODEL AV/AION SCALE f-O MACCH MC 72 0153 50 Model Aviation OLJRAL PANEL ON UNDERSIDE ONLY F-8 TYPICAL SECTION STRUT SECTION COLOURS OVERALL -- CRIMSON COOLANT & _ _ -BRASS OIL RADIATORS FLOAT UNOERSIDES TAIL LEGEND FTC SPINNERS PROPELLERSNATURAL WINGTIPS METAL AILERONS BRACING RUDDER AR/GI-IT GREEN STRIPING WI/lit SCARLET CARBURETTOR Il-ifAKE BLACK INSPECTION DOORS DURAL TO OIL COOLER --V THIS DRAWING SHOWS 107 AT THE 7934 PARIS SALON FOLLOWING THE RECORD QF 23-70 - PRESENT NODII7CA TIONS INCILIDE SHORTENED UNDER-FIN 0 MINOR CHANGES 70 PAINT FINISH 779 0 TAO WERE FITTED WITH LONGER FLOATS 0 VENTRAL COOLANT RADIATOR BUT OlD NOT ORIGINALLY HAVE EITHER THE EXTENDED UNDER FIN OR TUNNEL CARBURETTOR INTAKE 1SF t 21 T2 Wt TYPICAL SECT/ON EXTENDS TO ROOT 7 TB INCIDENCE IS CONSTANT s-ITYPICAL SECTION SIDES OF ELEVATORS ARE FLAT F 5 v ~F F F 5 DA TA 949On WING CHORD7-73O WiNG AREA NETT OVERALL LENGTH0610 , FUSELAGE LENGTHS* --- 0350 m FLOAT LENGTH** _ _ 6575 _ FLOAT TRACK2700, STABILIZER SPANS2920, PROPELLER 0/AMS59O EMPTY WEIGHT2500kg LOADED WEIGHT - -2 907kg *INCLUD/NG EXTENDED UNDER-FIN **EXCLUO/NG MOORING RINGS F-b 3I 11 5-W /67 /52 274 a- IOt5 9-7~ a- 6 s S2 Ii 64/0 II F-It R-I F8 7 I-I IT LEGEND January 1978 51 F-JF-4F-SF-6F-6A IF 11 [ U-ULJ jJ worked Telescoped propeller shafts passed between cylinder banks forward unit shaft driven via gear train engine Super charger aft end fed both units consumed 200 hp 3100 hp developed Photographs T C Weaver collection pontoons hanging below seeming contradiction known about streamlining two main reasons Schneider Trophy become politically important governments willing spend vast amounts money develop unlimited racing seaplanes demonstration technol ogy two Only endless water run ways long enough airplanes small high-speed wings take off days wide 10000-ft concrete strips 747s far future get off water penalty paid form pontoons sight two devices almost large fuselage hanging belly strikes terror heart modern designer helped considerably hurt several years during reign seaplane worlds fastest landplane 100 mph slower best its water cousins Thanks impetus magnifi cent Schneider Trophy US start ed trend series C irtiss military racers led ultii sleek two-wingers d Pulitzer Schneider rt 1920s bringing fame si Doolittle Curtiss R2 play National Air & S no matter sI can t answer 1 lems speed s parts struts holding double needed wing-ft course silly seco did offer advantages re improvements metals design about spell th plane race all-out s first turn theory Italians start c become historic series planes Macchi woi 1926 great extent Curtiss racer place ti its struts few iate biplanes minated es mid ch Jimmy -2 dis ace Museum e biplanes Itimate prob uck too n extra wing elage joints d wing uced weight md structural end bi eed reality what f racing seacs M39 monoplane e upper wing lim wires brace thin single wing placed low Curtiss-like fuselage Mario de Bernardi pilot three M39s won 1926 Schneider 264 mph barely 12 mph slower absolute world speed record set straight-away course French Ferbois landplane 1924 following year another name des tined glory added records Supermarine S5 piloted S N Webster won 1927 Schneider world record pace 282 mph though no official record set Little month later deBernardi again time new Macchi M52s failed finish 1927 Schneider speed 29782 mph first true absolute world speed record set sea plane 1928 mark composed four passes over 3-km/l86-mi course raised 31846 mph deBernardi clipped-wing version M52 worlds fastest landplane now 50 mph behind times fading fast British returned vengeance Waghorn won 1929 Schneider Race new Supermarine S6 329 mph Orlebar set world 3-km record 3577 mph same machine few days later Italians seen handwriting wall surren dered genius R J Mitchell soon create immortal Spitfire out seaplane experience yet Macchi developed M67 power up M52s 1000-hp Fiat 1400 hp 18-cylinder threebank Isotta Fraschini come naught M67s crashed test flight other two failed finish 1929 Schneider Race Well aware 1931 Schneider would last long impor tant series British succeeded win ning third straight time men Macchi set work create clean est powerful airplane world ever seen achieve go radical design since conven Continued page 102 52 Model Aviation ground crew swarms over o 1 1 just betore averaged 4411577 tour dashes over 3km course 19344-1/2 years later its mark fell landplanethe Heinkel He100 464 mph will score high am static judg ing scale contest entries start maxmum points As see omitted details incorrect color markings points start deducted errors see between scale documentation model less will final static score So sure add obvi ous features show documen tation brings us subject proofof-scale documentation absence scale documentation part sev eral contestants recent scale contest made think article might some use would surprised times someone will enter con test just see model will rank against fellow modelers However same contestants will 3-view drawing will have nothing show chosen color scheme did exist full scale aircraft Without vital pieces paper judges can award craftsmanship points since can score maximum 30 points chances placing will dim Very few aircraft available model kits have subject magazine article book Model magazines constantly featuring articles about full-scale aircraft usually clude both 3-views photographs Color pictures less likely found mag azines books excep tions best proof scale source full-scale aircraft itself should present no problems Piper Cub some other aircraft proliferates local airport B-17 however likely found locally unless live Har lingen Texashome Confederate Air Force have access full-scale aircraft afternoon camera should produce necessary docu mentdtion Beware however poor film exposure discount processing colors print taken family instant camera developed local drug store may bear little resemblance actual sub ject Especially difficult photograph aircraft displayed museums lit fluor escent lights have discovered satis factory filter correct colors either daylight tungsten film used under fluo rescent lighting find own flash unit acceptable form lighting museum subject photographic presen tation used document sub ject recommend give judges minimum number pictures show major features prototype show close-ups details sure same details appear model An other reason build large scale details such venturis navigation lights fairings etc easier build large final note Take helper first scale contest Ill guarantee hands will shaking like yours product review product review product review flight line always start first flip engine wont give hint pop Count everything going wrong contest mind work out ahead time helper responsible what you will automatically prepared M acchi/Berliner continued page 52 tional ideas pretty well taken practical limits turn stretched out development period far beyond 1931 Schneider allowed British win opposition retire trophy lobby Royal Aero Club London Italians following route others attacking 3-km world speed record own ways Across Atlantic America mili tary pulled out speed race leav ing wide open civilians meant marvelous home-made machines thrilling nation National Air Races Craft like barrel-shaped GeeBee conventional Wedell Williams straining poor little hearts out trying hit 300 mph Shell Speed Dash small-time stuff men thinking terms 400 mph seaplanes 1000-hp P&W Wasps American racing scene excited mere toys compared Rolls Royce Fiat engines European counterparts using obviously needed reach strange new world 400 mph two basic routes could followed greater speed Radical air frames radical powerplants clear some major changes would have made Italians ever beat 358 mph 1900-hp Supermarine Radical racers never very suc cessful past still arent 1929 Piaggio Pc7 racer might have real record-breaker its retractable hydrofoils place pontoons never flew contemporary Savoia Marchetti 565 twin-boom affair 1000-hp engines either end central pod never de-bugged enough show its potential Still idea two engines fuse lage appealed Macchi works way combine greatly increased power limited drag singleengined airplane Together Fiat Company built type AS5 engine used previous successful seaplane racers Macchi created ultimate watercraft Macchi-Castoldi MC72 Aerodynamically just same philosophy Macchi done well past long thin fuselage minimum wings tiny windshield huge pontoons neatly faired struts sup porting powerplant another kettle fish 102 Model Aviation MR MODELER manufacture special ized accessories make R/C modeling easier never out stock items manufacture Seeyour deal er send first class stamp catalog sheets listing over 70 items complete pictures prices OVER 12 YEARS SERVICE FUEL IT FLIT IT N GO _ Other Davis Diesel Produc5a 0-Varnishing Brushes 020-60 0 Fuel Bulbs land 2 oz 1/2A Fuel Line Asst 1/4 l/2A Twin Exhaust Stax Send SASE literature - Deelee inquiries invited DIESEL CONVERTERS $995 Up 50% power 50% economy glow new fuel formula Fuel. Pt $350 Qt $500 $100 P & H f5iAsk/o ur dealer add $150 p&h L.J order direct Co nn Res add ST Davis Diesel Dewlopment Inc BOX 141 DEPT E MILFORD CT 06460 PHONE 203 877-1670 product review product review product review Prop Balancer have ever rigged pair razor blades mandrel balancing propellers welcome gadget Handy use allows balancing prop across short axis well usual long axis Can carried handily pocket use cap ends unscrewed cartridge-like case pin base set flat level surface cone piece threaded prop hole per instructions prop placed pin check balance Price $295 Du-Bro Products Inc 480 Bonner Rd Wauconda IL 60084 Basically two AS5s linked gether back-to-front crankcase two V-12s two entirely separate crankshafts revolving opposite directions geared propeller drive shaft located between cylinder banks forward 'engine~ drive shafts telescoped drove two-bladed prop revolved opposite directions thus comprising first contra-rotating propellers ever stalled airplane obvious external dif ferencetwo props centerlineand also clue biggest reason MC72 superior come before did permit full power 50-liter 3100 cu engine used eliminated awful effects torque caused other powerful racing seaplanes dig pon toon deep water power applied great sounding idea dif ferent enough men created along siege teething troubles supercharger fed both engines least successful part entire operation according Dr Vandone engineer charge development Fiat Its efficiency low 1931 rotor-shaft bearings problem friction clutch small compact either worked too well correct clutch slippage high speed different discs tried along kinds teeth pinion major problems faced men wanted go faster anyone else cooling engine fat radial stuck right out front wind could get no great challenge airplane in-line engine tightly cowled reduce drag cooling came very big headache Ordinary water wasnt up task keeping racing engine melting high rpm since ethylene-glycol just being developed USA wasnt available first Italians went another technique Skin sur face radiators far area could possibly achieved ordinary flow-through radiators managed keep temperature down manage able level long enough set speed records system no value mili tary commercial planes worked well enough short blast idea used effectively Curtiss Racers 1920s later used special Messerschmitt set landplane record 1939 soon faded out wings struts floats tail MC72 covered skin radi ators water oil no way increase cooling area relatively new ethylene-glycol tried coolant found unsatis factory installation Heat problems showed up first valves dif LJLJ r ~1 Fren PEA NO PEDPLE QUALITY KIT DESIGNED ESPECIALLY FOR THE NEW MINIATURE RADIOS L BUT EASY TO FLY SPECIFICATIONS WINGSPAN 25 INCHES POWER 020 GAS ENGINE RADIO MINIATURE 2-3 CHANNEL FLYING WT R TO 10 OZ KIT INCLUDES CUT BALSA AND PLYWOOD FORMED LANDING GEAR & CANOPY HARDWARE FOR CONTROLS KIT $1495 ASK AT YOUR LOCAL DEALER IF NOT AVAILABLE ORDER DIRECT ADD 75g PEANUT SCALE KITS AND HARD TO FIND ITEMSBROWN CO-2 ENGINES COMPLETE CATALOG 5O Peck.PeIvmesP 0 BOX 2498 -AMLA MESA CALIF 92041 WPHONE 17141 469-8675 1714 442-46362 ferent techniques tried cooling Small improvements made until cylinder heads redesigned did valves cool properly During tests 1000 valves made 12 different sets valve-springs-and-cam shafts tried test engines tests ran April June 1931 leaving just over two months until Schneider Trophy Race still problems ignition supply fuel-air mixture getting cylinders tests changes tests first AS6 engines fly MC72 left water June 22 low-com pression version final engine devel oping 2300 hp against hopedfor 3000 hp competition far ready back-fired first flight trouble its fuel pumps ran hot something wrong wires bracing wings too Any hope getting England Schnei der gone attention switched get ting three airplanes ready attack world speed record especially view events other countries new Supermarine S6B came through classy win final Schneider Race 340 mph wiped out absolute record 358 mph slashing 407 mph February 1932 MC72 its radical engine finally passed official Italian Government tests required five passes over simulated speed course high power British meanwhile decided let things go figuring 407 mph British airplane could possibly achieve until 1938 would begin think seriously about getting back race Cleveland 1932 Doolittle increased landplane record 294 mph GeeBee R-l Super Sportster unknow ingly demonstrated just far US behind Half year later usually quiet lake edge Italian Alps MC72 began show its stuff Piloted Warrant Officer Francesco Agello MC72s 2800-hp Fiat AS6 engine showed world indeed worth trouble four passes over 3-km course Lake Garda near Desenzano Agello averaged 42377 mph first three nearly-identical air planes serial-numbered 179 almost 50% faster fastest Ameri can airplane fastest landplane world come October Casinelli used same air plane set world speed record 100-km closed circuit 391 mph later same month third pilot Italian High-Speed Flight Scapinelli used #180 win first Coupe Bleriot aver aging 385 mph half hour Intended replacement Schnei der Bleriot Cup years fastest flight least 30 minutes go permanently first pilot averaged over 1000 kph 621 mph half hour pipe-dream time praiseworthy achievements MC72 attracted great acclaim Italian Air Force especially bombastic II DuceItalys dictator Benito Mussolini applause also went Gen Italo Balbo commander Regia Aeronautica later die under mys terious circumstances after running afoul Mussolini well Macchi Fiat directly respon sible splendid demonstration great extent Fascist politicians received greatest bene fit non-political cheers friends future foes alike somewhere along line Fascists screwed things up never officially admitted understandably solid reason believe civilian test pilot Simeone Marsone actually flew MC72 fastest Mussolini wanted credit go Air Force times never submitted FAI According very good source Marsone clocked amazing 475 mph sometime 1934 As 424-mph mark lasted year half Oct 23 1934 Fran cesco Agello again climbed MC72 prepared let er rip over Lake Garda time however #181 January1978 103 1/3 SIZE SR FALCON M kII LIBERTY BELL MODEL No 101 No 103 No104 No112 No118 No121 No 123 No124 No 125 No 131 No134 No 136 No 141 No146 No147 No149 No 151 No153 No165 No159 No 164 No165 No166 No168 No169 No 172 No 174 No 176 No177 No 178 No 160 No181 No183 No 184 No185 No186 No187 No188 No189 No 190 No191 No192 No193 No194 No195 No196 No197 No 198 No 199 No200 No201 No 202 No 203 No204 No205 No 206 No 207 No 208 FULLSIZE PLANS No 209 Seastrutz$450 RC bipe 3 channels 19 wheels pontoons No 210 Simplex$450 FF years development contest wns049/051 No211 Together IV$375 CL Somewhat large impressive stuntor 46 Consistent winner Short Seamew 40-powered Class Carrier model good prototype lends itself innovations $300 Kloud King 15-19 AC Old-Timer Free Flight based upon 1938 record breaker FF $400 Wiley Post Biplane Petite durable scale design forsither rubber tail wagger pulse rudder $225 Sneat Sport AC glider simple job thet can flown engine $275 GollyGeeWhz Dan Rutherfords simple Half-A powered Combat job turns dime $150 Gremlin Sturdy acrobatic AC biplane flies well 35s up 80s $300 4-Bits 40-powered AC 600 Club Racer has winning ways Good sport too $400 Semi-Pm Contest-winning HI glider hess pop-up tail dethermalizer $100 IlaIf-Korda rubber John Oldenkamps 112-size all-balsa Old-Timer $1 76 Gee Bee Model Y 40-powered AC stand-off scale great old-time racers. *600 Celliato superb Standard Class AC sailplane also took Nats first $400 Flaselar $torch AC scale model 23-45 5-channel has both slots flaps $400 Blackburn Monoplane AC Scale rendition history-maker wheels floats 40 engine $480 QuickSilver AC 1/2A Pylon Racer incorporates latest techniques $200 8-1 AC 15 USAF bomber full house Ace foam wings Stable $275 Comedian AC fun-fly acrobatic biplane good looker 40 80 $400 Nesmith Cougar FF rubber scale 30-in span Excellent design long flights $300 Cerberua AC 50-powered Pattern job retracts advanced features $475 Tellipsoar AC Standard Class sailplane wins stand-cdt performance $1000 Tercal Keith Trostlas /2A Cl Stunt ship flies excellent pattern $200 Pogo AC Formula Pylon racer deBolt based full-scale Owl $750 Midget Mustang CL 1975-1976 Nats winning Goodyear byJohn Ballard $200 Nothing Fancy AC biplane 35 engines pretty handles beautifully $825 Simiter AC apectaculer flying-wing 15 fin-mounted tractor $300 Dennyplane AC version famed cabin model kit 193719-25 $400 Tutorn AC Cabin model scale-like performance 25-35 $325 Iron Dog AC Quarter Midget Bell Airacobra has won Pylon contests $400 Qua dCoupe rubber power $his attraqtive Coupe has excellent performance $300 Zonker AC canard hastltt5fllIItii~r 40 power$300 Country Boy FF JirnCteriv thbrougbbred/09/5 1 1/2A $300 Bristol Scout AC 02 power scale pulse rudder small radios $200 Bed Chock Charlie AC Scale model Russian PT trainer 09/15 $300 Answer AC FF cabin 02 sized Replica Old-Timer $175 SevIlle AC Sport low-wing sailplane 80 wing has excellent performance $350 Chester Slow CL Slow Combat model Dan Rutherford frequent winner $275 Fancy Pants AC Sport/Aerobatic low-wing has ply-skin fuselage 25s 45s $480 BiVSoy FF Unlimited Class rubber model no frills great performer $300 Rockette FF model Jetex-type power isa Nationals winner $150 Vintage 11 AC Antique type old-time open fuse construction 60 $475 Snake CL Rat racerby Dick Lambartlatest state art $200 Mountaineer AC Slope Soarer Clarence Haughtgood can get $375 Chipmunk AC Scale winner 1976 World Championships Nets $900 Stiletto CL stunt model McDonald winner 1976 FAI World Champs $375 Vol Ubre FF rubber-powered Wakefield Bob White Great winner $275 Hats Biplane AC aerobatic scale job takes 40/50 built-in muffler $475 Mirage Sharwood Buckataffs Fast Combattwice Nats winner $250 Fokker T-2 Nets winning FF scale electric poweredAstro 02 etc $275 Sporteter AC deBolt wing choice aerobatics/racing *375 P3 AC Cox 09 Ace foam wings step up 049 jobs $350 Ole Reliable CL Formula 40 speed job Snyders Nets winner $175 Roll Out FF hand-launch glider has pop-up dethermalizer $100 Avenger CL profile 049 uses sheet wing maneuverable $160 PokkerDVIII AC 45 60 Two sheets 2-1/2 scale $900 Cardboard Douglas M-2 CL 50 biplane 40power less $10 expense $600 Rock AC aerobatics 19-40 engines Simple tail-dragger $360 Air Camper FF Pisetanpol 1/2A Charming old-timer 2-sheets $300 Uvesay DL 5 AC English honiebuilt 3-clmen. 16s Exotic easy Good flier $500 Swinger CL 1 /2A all-balsa swing-wing Fly fun use experiments $2 00 Circle numbers plans wish order 104112118121 147149151153 174176177178 189190191192 201202203204 Please print carefully 101 103 123124125131134136141146 155159164165166168169172 180181183184185186187188 193194195196197198199200 205206207208209210211 Enclosed $ NAME CITY 710 STATE Price includes first-class postage Send check money order payable ModelAviation AMA 815 Fifteenth St. NW Washington DC 20005 smaller lighter floats engine up its full 3100 hp about 200 hp absorbed supercharger times 3-km dashes 1529 sec 1519 sec 1518 sec 1523 sec speed figured out 440677 mph far short 475 mph may have achieved civilian filed accepted FAI remains almost 43 years later highest official speed ever attained prop-driven seaplane 41/2 years after Agello set MC72s record remained absolute world mark airplanes types until Hans Dieterle flew 464 mph pro totype Heinkel He-l00 did landplane fly faster greatest racing seaplanes World War II understandably tough military racing airplanes He-l00 ferocious Me-209 barely beat its record few days later both inno cent victims Allied bombing raids fuselage Me-209 remains Polish museum final record-holding Macchi-Castoldi 72 however managed get through some very trying years Today #181 Caproni Aeronautical Muse um Milan Italy looking beautiful powerful unbelievably fast did 1934 caused aviation world shake its head wonder Editors Note press time information received source expert MC 72 aircraft two ships also lost training ADVERTISERS INDEX Ace Radio Control ndrews Aircraft Model Co ove rite28 94 Cox Hobbies Inc15 Davis Diesel Development102 Du-Bro Products3 EK-Logictrol7 Flyline Models96 Fox Mfg Company7 Carl Goldberg Models20 Grish Brothers88 Helmut Bernhardt99 Hobby Hideaway100 Hobbypoxy91 K&B Mfg85 Kraft Great Lakes Inc97 Midwest Model Products6 Morrison Repla-Tech100 Pactra Industries83 Peck-Polymers103 Progress Mfg Company86 Pylon Publications92 R/C Buyers Guide93 Rocket City Specialties102 Sig Mfg Company1 Sterling Models Inc5 Tatone Products Inc87 Top Flite Models Inc81 Westport International89 Williams Brothers90 World EnginesBack Cover 104 Model Aviation
Edition: Model Aviation - 1978/01
Page Numbers: 49, 50, 51, 52, 102, 103, 104
Hanging Caproni Aeronautical Museum Milan Italy torys memorable flying machines 3100-hp seaplane set absolute speed record 440677 mph Far faster landplane its day tandem-engined marvel clocked unoffi cially 475 mph 1934 still holds speed record seaplanes U Don Berliner FOR DOZEN YEARS Lind berghs transatlantic flight until World War II about begin fastest air planes world seaplanes GeeBee racers jazzy little Army Air Corps pursuits special experimental craft water-borne machines huge Top Two three MC 72s built 1931 Schneider Trophy Race Late 1932 No 180 flown three different pilots averaged 42377 mph over 3-km course set closed-circuit mark 391 mph over 100-km course won First Bleriot Cup averaging 385 mph half hour Cowl removed ship foreground reveals huge 24-cylinder Fiat en gineactually two AS 6 racing engines back back single crankcase Above rest water No 181 shows advantage contra-rotating props some skin radiators covered wings fuselage sides floats wide float struts January1978 49 NOrE THAT TAPER IN WING THICKNESS BEGINS AT SECTION Wi SEE PLAN PEAT SIDES FRQI HERE APT Drawings byJ H Robinson MODEL AV/AION SCALE f-O MACCH MC 72 0153 50 Model Aviation OLJRAL PANEL ON UNDERSIDE ONLY F-8 TYPICAL SECTION STRUT SECTION COLOURS OVERALL -- CRIMSON COOLANT & _ _ -BRASS OIL RADIATORS FLOAT UNOERSIDES TAIL LEGEND FTC SPINNERS PROPELLERSNATURAL WINGTIPS METAL AILERONS BRACING RUDDER AR/GI-IT GREEN STRIPING WI/lit SCARLET CARBURETTOR Il-ifAKE BLACK INSPECTION DOORS DURAL TO OIL COOLER --V THIS DRAWING SHOWS 107 AT THE 7934 PARIS SALON FOLLOWING THE RECORD QF 23-70 - PRESENT NODII7CA TIONS INCILIDE SHORTENED UNDER-FIN 0 MINOR CHANGES 70 PAINT FINISH 779 0 TAO WERE FITTED WITH LONGER FLOATS 0 VENTRAL COOLANT RADIATOR BUT OlD NOT ORIGINALLY HAVE EITHER THE EXTENDED UNDER FIN OR TUNNEL CARBURETTOR INTAKE 1SF t 21 T2 Wt TYPICAL SECT/ON EXTENDS TO ROOT 7 TB INCIDENCE IS CONSTANT s-ITYPICAL SECTION SIDES OF ELEVATORS ARE FLAT F 5 v ~F F F 5 DA TA 949On WING CHORD7-73O WiNG AREA NETT OVERALL LENGTH0610 , FUSELAGE LENGTHS* --- 0350 m FLOAT LENGTH** _ _ 6575 _ FLOAT TRACK2700, STABILIZER SPANS2920, PROPELLER 0/AMS59O EMPTY WEIGHT2500kg LOADED WEIGHT - -2 907kg *INCLUD/NG EXTENDED UNDER-FIN **EXCLUO/NG MOORING RINGS F-b 3I 11 5-W /67 /52 274 a- IOt5 9-7~ a- 6 s S2 Ii 64/0 II F-It R-I F8 7 I-I IT LEGEND January 1978 51 F-JF-4F-SF-6F-6A IF 11 [ U-ULJ jJ worked Telescoped propeller shafts passed between cylinder banks forward unit shaft driven via gear train engine Super charger aft end fed both units consumed 200 hp 3100 hp developed Photographs T C Weaver collection pontoons hanging below seeming contradiction known about streamlining two main reasons Schneider Trophy become politically important governments willing spend vast amounts money develop unlimited racing seaplanes demonstration technol ogy two Only endless water run ways long enough airplanes small high-speed wings take off days wide 10000-ft concrete strips 747s far future get off water penalty paid form pontoons sight two devices almost large fuselage hanging belly strikes terror heart modern designer helped considerably hurt several years during reign seaplane worlds fastest landplane 100 mph slower best its water cousins Thanks impetus magnifi cent Schneider Trophy US start ed trend series C irtiss military racers led ultii sleek two-wingers d Pulitzer Schneider rt 1920s bringing fame si Doolittle Curtiss R2 play National Air & S no matter sI can t answer 1 lems speed s parts struts holding double needed wing-ft course silly seco did offer advantages re improvements metals design about spell th plane race all-out s first turn theory Italians start c become historic series planes Macchi woi 1926 great extent Curtiss racer place ti its struts few iate biplanes minated es mid ch Jimmy -2 dis ace Museum e biplanes Itimate prob uck too n extra wing elage joints d wing uced weight md structural end bi eed reality what f racing seacs M39 monoplane e upper wing lim wires brace thin single wing placed low Curtiss-like fuselage Mario de Bernardi pilot three M39s won 1926 Schneider 264 mph barely 12 mph slower absolute world speed record set straight-away course French Ferbois landplane 1924 following year another name des tined glory added records Supermarine S5 piloted S N Webster won 1927 Schneider world record pace 282 mph though no official record set Little month later deBernardi again time new Macchi M52s failed finish 1927 Schneider speed 29782 mph first true absolute world speed record set sea plane 1928 mark composed four passes over 3-km/l86-mi course raised 31846 mph deBernardi clipped-wing version M52 worlds fastest landplane now 50 mph behind times fading fast British returned vengeance Waghorn won 1929 Schneider Race new Supermarine S6 329 mph Orlebar set world 3-km record 3577 mph same machine few days later Italians seen handwriting wall surren dered genius R J Mitchell soon create immortal Spitfire out seaplane experience yet Macchi developed M67 power up M52s 1000-hp Fiat 1400 hp 18-cylinder threebank Isotta Fraschini come naught M67s crashed test flight other two failed finish 1929 Schneider Race Well aware 1931 Schneider would last long impor tant series British succeeded win ning third straight time men Macchi set work create clean est powerful airplane world ever seen achieve go radical design since conven Continued page 102 52 Model Aviation ground crew swarms over o 1 1 just betore averaged 4411577 tour dashes over 3km course 19344-1/2 years later its mark fell landplanethe Heinkel He100 464 mph will score high am static judg ing scale contest entries start maxmum points As see omitted details incorrect color markings points start deducted errors see between scale documentation model less will final static score So sure add obvi ous features show documen tation brings us subject proofof-scale documentation absence scale documentation part sev eral contestants recent scale contest made think article might some use would surprised times someone will enter con test just see model will rank against fellow modelers However same contestants will 3-view drawing will have nothing show chosen color scheme did exist full scale aircraft Without vital pieces paper judges can award craftsmanship points since can score maximum 30 points chances placing will dim Very few aircraft available model kits have subject magazine article book Model magazines constantly featuring articles about full-scale aircraft usually clude both 3-views photographs Color pictures less likely found mag azines books excep tions best proof scale source full-scale aircraft itself should present no problems Piper Cub some other aircraft proliferates local airport B-17 however likely found locally unless live Har lingen Texashome Confederate Air Force have access full-scale aircraft afternoon camera should produce necessary docu mentdtion Beware however poor film exposure discount processing colors print taken family instant camera developed local drug store may bear little resemblance actual sub ject Especially difficult photograph aircraft displayed museums lit fluor escent lights have discovered satis factory filter correct colors either daylight tungsten film used under fluo rescent lighting find own flash unit acceptable form lighting museum subject photographic presen tation used document sub ject recommend give judges minimum number pictures show major features prototype show close-ups details sure same details appear model An other reason build large scale details such venturis navigation lights fairings etc easier build large final note Take helper first scale contest Ill guarantee hands will shaking like yours product review product review product review flight line always start first flip engine wont give hint pop Count everything going wrong contest mind work out ahead time helper responsible what you will automatically prepared M acchi/Berliner continued page 52 tional ideas pretty well taken practical limits turn stretched out development period far beyond 1931 Schneider allowed British win opposition retire trophy lobby Royal Aero Club London Italians following route others attacking 3-km world speed record own ways Across Atlantic America mili tary pulled out speed race leav ing wide open civilians meant marvelous home-made machines thrilling nation National Air Races Craft like barrel-shaped GeeBee conventional Wedell Williams straining poor little hearts out trying hit 300 mph Shell Speed Dash small-time stuff men thinking terms 400 mph seaplanes 1000-hp P&W Wasps American racing scene excited mere toys compared Rolls Royce Fiat engines European counterparts using obviously needed reach strange new world 400 mph two basic routes could followed greater speed Radical air frames radical powerplants clear some major changes would have made Italians ever beat 358 mph 1900-hp Supermarine Radical racers never very suc cessful past still arent 1929 Piaggio Pc7 racer might have real record-breaker its retractable hydrofoils place pontoons never flew contemporary Savoia Marchetti 565 twin-boom affair 1000-hp engines either end central pod never de-bugged enough show its potential Still idea two engines fuse lage appealed Macchi works way combine greatly increased power limited drag singleengined airplane Together Fiat Company built type AS5 engine used previous successful seaplane racers Macchi created ultimate watercraft Macchi-Castoldi MC72 Aerodynamically just same philosophy Macchi done well past long thin fuselage minimum wings tiny windshield huge pontoons neatly faired struts sup porting powerplant another kettle fish 102 Model Aviation MR MODELER manufacture special ized accessories make R/C modeling easier never out stock items manufacture Seeyour deal er send first class stamp catalog sheets listing over 70 items complete pictures prices OVER 12 YEARS SERVICE FUEL IT FLIT IT N GO _ Other Davis Diesel Produc5a 0-Varnishing Brushes 020-60 0 Fuel Bulbs land 2 oz 1/2A Fuel Line Asst 1/4 l/2A Twin Exhaust Stax Send SASE literature - Deelee inquiries invited DIESEL CONVERTERS $995 Up 50% power 50% economy glow new fuel formula Fuel. Pt $350 Qt $500 $100 P & H f5iAsk/o ur dealer add $150 p&h L.J order direct Co nn Res add ST Davis Diesel Dewlopment Inc BOX 141 DEPT E MILFORD CT 06460 PHONE 203 877-1670 product review product review product review Prop Balancer have ever rigged pair razor blades mandrel balancing propellers welcome gadget Handy use allows balancing prop across short axis well usual long axis Can carried handily pocket use cap ends unscrewed cartridge-like case pin base set flat level surface cone piece threaded prop hole per instructions prop placed pin check balance Price $295 Du-Bro Products Inc 480 Bonner Rd Wauconda IL 60084 Basically two AS5s linked gether back-to-front crankcase two V-12s two entirely separate crankshafts revolving opposite directions geared propeller drive shaft located between cylinder banks forward 'engine~ drive shafts telescoped drove two-bladed prop revolved opposite directions thus comprising first contra-rotating propellers ever stalled airplane obvious external dif ferencetwo props centerlineand also clue biggest reason MC72 superior come before did permit full power 50-liter 3100 cu engine used eliminated awful effects torque caused other powerful racing seaplanes dig pon toon deep water power applied great sounding idea dif ferent enough men created along siege teething troubles supercharger fed both engines least successful part entire operation according Dr Vandone engineer charge development Fiat Its efficiency low 1931 rotor-shaft bearings problem friction clutch small compact either worked too well correct clutch slippage high speed different discs tried along kinds teeth pinion major problems faced men wanted go faster anyone else cooling engine fat radial stuck right out front wind could get no great challenge airplane in-line engine tightly cowled reduce drag cooling came very big headache Ordinary water wasnt up task keeping racing engine melting high rpm since ethylene-glycol just being developed USA wasnt available first Italians went another technique Skin sur face radiators far area could possibly achieved ordinary flow-through radiators managed keep temperature down manage able level long enough set speed records system no value mili tary commercial planes worked well enough short blast idea used effectively Curtiss Racers 1920s later used special Messerschmitt set landplane record 1939 soon faded out wings struts floats tail MC72 covered skin radi ators water oil no way increase cooling area relatively new ethylene-glycol tried coolant found unsatis factory installation Heat problems showed up first valves dif LJLJ r ~1 Fren PEA NO PEDPLE QUALITY KIT DESIGNED ESPECIALLY FOR THE NEW MINIATURE RADIOS L BUT EASY TO FLY SPECIFICATIONS WINGSPAN 25 INCHES POWER 020 GAS ENGINE RADIO MINIATURE 2-3 CHANNEL FLYING WT R TO 10 OZ KIT INCLUDES CUT BALSA AND PLYWOOD FORMED LANDING GEAR & CANOPY HARDWARE FOR CONTROLS KIT $1495 ASK AT YOUR LOCAL DEALER IF NOT AVAILABLE ORDER DIRECT ADD 75g PEANUT SCALE KITS AND HARD TO FIND ITEMSBROWN CO-2 ENGINES COMPLETE CATALOG 5O Peck.PeIvmesP 0 BOX 2498 -AMLA MESA CALIF 92041 WPHONE 17141 469-8675 1714 442-46362 ferent techniques tried cooling Small improvements made until cylinder heads redesigned did valves cool properly During tests 1000 valves made 12 different sets valve-springs-and-cam shafts tried test engines tests ran April June 1931 leaving just over two months until Schneider Trophy Race still problems ignition supply fuel-air mixture getting cylinders tests changes tests first AS6 engines fly MC72 left water June 22 low-com pression version final engine devel oping 2300 hp against hopedfor 3000 hp competition far ready back-fired first flight trouble its fuel pumps ran hot something wrong wires bracing wings too Any hope getting England Schnei der gone attention switched get ting three airplanes ready attack world speed record especially view events other countries new Supermarine S6B came through classy win final Schneider Race 340 mph wiped out absolute record 358 mph slashing 407 mph February 1932 MC72 its radical engine finally passed official Italian Government tests required five passes over simulated speed course high power British meanwhile decided let things go figuring 407 mph British airplane could possibly achieve until 1938 would begin think seriously about getting back race Cleveland 1932 Doolittle increased landplane record 294 mph GeeBee R-l Super Sportster unknow ingly demonstrated just far US behind Half year later usually quiet lake edge Italian Alps MC72 began show its stuff Piloted Warrant Officer Francesco Agello MC72s 2800-hp Fiat AS6 engine showed world indeed worth trouble four passes over 3-km course Lake Garda near Desenzano Agello averaged 42377 mph first three nearly-identical air planes serial-numbered 179 almost 50% faster fastest Ameri can airplane fastest landplane world come October Casinelli used same air plane set world speed record 100-km closed circuit 391 mph later same month third pilot Italian High-Speed Flight Scapinelli used #180 win first Coupe Bleriot aver aging 385 mph half hour Intended replacement Schnei der Bleriot Cup years fastest flight least 30 minutes go permanently first pilot averaged over 1000 kph 621 mph half hour pipe-dream time praiseworthy achievements MC72 attracted great acclaim Italian Air Force especially bombastic II DuceItalys dictator Benito Mussolini applause also went Gen Italo Balbo commander Regia Aeronautica later die under mys terious circumstances after running afoul Mussolini well Macchi Fiat directly respon sible splendid demonstration great extent Fascist politicians received greatest bene fit non-political cheers friends future foes alike somewhere along line Fascists screwed things up never officially admitted understandably solid reason believe civilian test pilot Simeone Marsone actually flew MC72 fastest Mussolini wanted credit go Air Force times never submitted FAI According very good source Marsone clocked amazing 475 mph sometime 1934 As 424-mph mark lasted year half Oct 23 1934 Fran cesco Agello again climbed MC72 prepared let er rip over Lake Garda time however #181 January1978 103 1/3 SIZE SR FALCON M kII LIBERTY BELL MODEL No 101 No 103 No104 No112 No118 No121 No 123 No124 No 125 No 131 No134 No 136 No 141 No146 No147 No149 No 151 No153 No165 No159 No 164 No165 No166 No168 No169 No 172 No 174 No 176 No177 No 178 No 160 No181 No183 No 184 No185 No186 No187 No188 No189 No 190 No191 No192 No193 No194 No195 No196 No197 No 198 No 199 No200 No201 No 202 No 203 No204 No205 No 206 No 207 No 208 FULLSIZE PLANS No 209 Seastrutz$450 RC bipe 3 channels 19 wheels pontoons No 210 Simplex$450 FF years development contest wns049/051 No211 Together IV$375 CL Somewhat large impressive stuntor 46 Consistent winner Short Seamew 40-powered Class Carrier model good prototype lends itself innovations $300 Kloud King 15-19 AC Old-Timer Free Flight based upon 1938 record breaker FF $400 Wiley Post Biplane Petite durable scale design forsither rubber tail wagger pulse rudder $225 Sneat Sport AC glider simple job thet can flown engine $275 GollyGeeWhz Dan Rutherfords simple Half-A powered Combat job turns dime $150 Gremlin Sturdy acrobatic AC biplane flies well 35s up 80s $300 4-Bits 40-powered AC 600 Club Racer has winning ways Good sport too $400 Semi-Pm Contest-winning HI glider hess pop-up tail dethermalizer $100 IlaIf-Korda rubber John Oldenkamps 112-size all-balsa Old-Timer $1 76 Gee Bee Model Y 40-powered AC stand-off scale great old-time racers. *600 Celliato superb Standard Class AC sailplane also took Nats first $400 Flaselar $torch AC scale model 23-45 5-channel has both slots flaps $400 Blackburn Monoplane AC Scale rendition history-maker wheels floats 40 engine $480 QuickSilver AC 1/2A Pylon Racer incorporates latest techniques $200 8-1 AC 15 USAF bomber full house Ace foam wings Stable $275 Comedian AC fun-fly acrobatic biplane good looker 40 80 $400 Nesmith Cougar FF rubber scale 30-in span Excellent design long flights $300 Cerberua AC 50-powered Pattern job retracts advanced features $475 Tellipsoar AC Standard Class sailplane wins stand-cdt performance $1000 Tercal Keith Trostlas /2A Cl Stunt ship flies excellent pattern $200 Pogo AC Formula Pylon racer deBolt based full-scale Owl $750 Midget Mustang CL 1975-1976 Nats winning Goodyear byJohn Ballard $200 Nothing Fancy AC biplane 35 engines pretty handles beautifully $825 Simiter AC apectaculer flying-wing 15 fin-mounted tractor $300 Dennyplane AC version famed cabin model kit 193719-25 $400 Tutorn AC Cabin model scale-like performance 25-35 $325 Iron Dog AC Quarter Midget Bell Airacobra has won Pylon contests $400 Qua dCoupe rubber power $his attraqtive Coupe has excellent performance $300 Zonker AC canard hastltt5fllIItii~r 40 power$300 Country Boy FF JirnCteriv thbrougbbred/09/5 1 1/2A $300 Bristol Scout AC 02 power scale pulse rudder small radios $200 Bed Chock Charlie AC Scale model Russian PT trainer 09/15 $300 Answer AC FF cabin 02 sized Replica Old-Timer $175 SevIlle AC Sport low-wing sailplane 80 wing has excellent performance $350 Chester Slow CL Slow Combat model Dan Rutherford frequent winner $275 Fancy Pants AC Sport/Aerobatic low-wing has ply-skin fuselage 25s 45s $480 BiVSoy FF Unlimited Class rubber model no frills great performer $300 Rockette FF model Jetex-type power isa Nationals winner $150 Vintage 11 AC Antique type old-time open fuse construction 60 $475 Snake CL Rat racerby Dick Lambartlatest state art $200 Mountaineer AC Slope Soarer Clarence Haughtgood can get $375 Chipmunk AC Scale winner 1976 World Championships Nets $900 Stiletto CL stunt model McDonald winner 1976 FAI World Champs $375 Vol Ubre FF rubber-powered Wakefield Bob White Great winner $275 Hats Biplane AC aerobatic scale job takes 40/50 built-in muffler $475 Mirage Sharwood Buckataffs Fast Combattwice Nats winner $250 Fokker T-2 Nets winning FF scale electric poweredAstro 02 etc $275 Sporteter AC deBolt wing choice aerobatics/racing *375 P3 AC Cox 09 Ace foam wings step up 049 jobs $350 Ole Reliable CL Formula 40 speed job Snyders Nets winner $175 Roll Out FF hand-launch glider has pop-up dethermalizer $100 Avenger CL profile 049 uses sheet wing maneuverable $160 PokkerDVIII AC 45 60 Two sheets 2-1/2 scale $900 Cardboard Douglas M-2 CL 50 biplane 40power less $10 expense $600 Rock AC aerobatics 19-40 engines Simple tail-dragger $360 Air Camper FF Pisetanpol 1/2A Charming old-timer 2-sheets $300 Uvesay DL 5 AC English honiebuilt 3-clmen. 16s Exotic easy Good flier $500 Swinger CL 1 /2A all-balsa swing-wing Fly fun use experiments $2 00 Circle numbers plans wish order 104112118121 147149151153 174176177178 189190191192 201202203204 Please print carefully 101 103 123124125131134136141146 155159164165166168169172 180181183184185186187188 193194195196197198199200 205206207208209210211 Enclosed $ NAME CITY 710 STATE Price includes first-class postage Send check money order payable ModelAviation AMA 815 Fifteenth St. NW Washington DC 20005 smaller lighter floats engine up its full 3100 hp about 200 hp absorbed supercharger times 3-km dashes 1529 sec 1519 sec 1518 sec 1523 sec speed figured out 440677 mph far short 475 mph may have achieved civilian filed accepted FAI remains almost 43 years later highest official speed ever attained prop-driven seaplane 41/2 years after Agello set MC72s record remained absolute world mark airplanes types until Hans Dieterle flew 464 mph pro totype Heinkel He-l00 did landplane fly faster greatest racing seaplanes World War II understandably tough military racing airplanes He-l00 ferocious Me-209 barely beat its record few days later both inno cent victims Allied bombing raids fuselage Me-209 remains Polish museum final record-holding Macchi-Castoldi 72 however managed get through some very trying years Today #181 Caproni Aeronautical Muse um Milan Italy looking beautiful powerful unbelievably fast did 1934 caused aviation world shake its head wonder Editors Note press time information received source expert MC 72 aircraft two ships also lost training ADVERTISERS INDEX Ace Radio Control ndrews Aircraft Model Co ove rite28 94 Cox Hobbies Inc15 Davis Diesel Development102 Du-Bro Products3 EK-Logictrol7 Flyline Models96 Fox Mfg Company7 Carl Goldberg Models20 Grish Brothers88 Helmut Bernhardt99 Hobby Hideaway100 Hobbypoxy91 K&B Mfg85 Kraft Great Lakes Inc97 Midwest Model Products6 Morrison Repla-Tech100 Pactra Industries83 Peck-Polymers103 Progress Mfg Company86 Pylon Publications92 R/C Buyers Guide93 Rocket City Specialties102 Sig Mfg Company1 Sterling Models Inc5 Tatone Products Inc87 Top Flite Models Inc81 Westport International89 Williams Brothers90 World EnginesBack Cover 104 Model Aviation
Edition: Model Aviation - 1978/01
Page Numbers: 49, 50, 51, 52, 102, 103, 104
Hanging Caproni Aeronautical Museum Milan Italy torys memorable flying machines 3100-hp seaplane set absolute speed record 440677 mph Far faster landplane its day tandem-engined marvel clocked unoffi cially 475 mph 1934 still holds speed record seaplanes U Don Berliner FOR DOZEN YEARS Lind berghs transatlantic flight until World War II about begin fastest air planes world seaplanes GeeBee racers jazzy little Army Air Corps pursuits special experimental craft water-borne machines huge Top Two three MC 72s built 1931 Schneider Trophy Race Late 1932 No 180 flown three different pilots averaged 42377 mph over 3-km course set closed-circuit mark 391 mph over 100-km course won First Bleriot Cup averaging 385 mph half hour Cowl removed ship foreground reveals huge 24-cylinder Fiat en gineactually two AS 6 racing engines back back single crankcase Above rest water No 181 shows advantage contra-rotating props some skin radiators covered wings fuselage sides floats wide float struts January1978 49 NOrE THAT TAPER IN WING THICKNESS BEGINS AT SECTION Wi SEE PLAN PEAT SIDES FRQI HERE APT Drawings byJ H Robinson MODEL AV/AION SCALE f-O MACCH MC 72 0153 50 Model Aviation OLJRAL PANEL ON UNDERSIDE ONLY F-8 TYPICAL SECTION STRUT SECTION COLOURS OVERALL -- CRIMSON COOLANT & _ _ -BRASS OIL RADIATORS FLOAT UNOERSIDES TAIL LEGEND FTC SPINNERS PROPELLERSNATURAL WINGTIPS METAL AILERONS BRACING RUDDER AR/GI-IT GREEN STRIPING WI/lit SCARLET CARBURETTOR Il-ifAKE BLACK INSPECTION DOORS DURAL TO OIL COOLER --V THIS DRAWING SHOWS 107 AT THE 7934 PARIS SALON FOLLOWING THE RECORD QF 23-70 - PRESENT NODII7CA TIONS INCILIDE SHORTENED UNDER-FIN 0 MINOR CHANGES 70 PAINT FINISH 779 0 TAO WERE FITTED WITH LONGER FLOATS 0 VENTRAL COOLANT RADIATOR BUT OlD NOT ORIGINALLY HAVE EITHER THE EXTENDED UNDER FIN OR TUNNEL CARBURETTOR INTAKE 1SF t 21 T2 Wt TYPICAL SECT/ON EXTENDS TO ROOT 7 TB INCIDENCE IS CONSTANT s-ITYPICAL SECTION SIDES OF ELEVATORS ARE FLAT F 5 v ~F F F 5 DA TA 949On WING CHORD7-73O WiNG AREA NETT OVERALL LENGTH0610 , FUSELAGE LENGTHS* --- 0350 m FLOAT LENGTH** _ _ 6575 _ FLOAT TRACK2700, STABILIZER SPANS2920, PROPELLER 0/AMS59O EMPTY WEIGHT2500kg LOADED WEIGHT - -2 907kg *INCLUD/NG EXTENDED UNDER-FIN **EXCLUO/NG MOORING RINGS F-b 3I 11 5-W /67 /52 274 a- IOt5 9-7~ a- 6 s S2 Ii 64/0 II F-It R-I F8 7 I-I IT LEGEND January 1978 51 F-JF-4F-SF-6F-6A IF 11 [ U-ULJ jJ worked Telescoped propeller shafts passed between cylinder banks forward unit shaft driven via gear train engine Super charger aft end fed both units consumed 200 hp 3100 hp developed Photographs T C Weaver collection pontoons hanging below seeming contradiction known about streamlining two main reasons Schneider Trophy become politically important governments willing spend vast amounts money develop unlimited racing seaplanes demonstration technol ogy two Only endless water run ways long enough airplanes small high-speed wings take off days wide 10000-ft concrete strips 747s far future get off water penalty paid form pontoons sight two devices almost large fuselage hanging belly strikes terror heart modern designer helped considerably hurt several years during reign seaplane worlds fastest landplane 100 mph slower best its water cousins Thanks impetus magnifi cent Schneider Trophy US start ed trend series C irtiss military racers led ultii sleek two-wingers d Pulitzer Schneider rt 1920s bringing fame si Doolittle Curtiss R2 play National Air & S no matter sI can t answer 1 lems speed s parts struts holding double needed wing-ft course silly seco did offer advantages re improvements metals design about spell th plane race all-out s first turn theory Italians start c become historic series planes Macchi woi 1926 great extent Curtiss racer place ti its struts few iate biplanes minated es mid ch Jimmy -2 dis ace Museum e biplanes Itimate prob uck too n extra wing elage joints d wing uced weight md structural end bi eed reality what f racing seacs M39 monoplane e upper wing lim wires brace thin single wing placed low Curtiss-like fuselage Mario de Bernardi pilot three M39s won 1926 Schneider 264 mph barely 12 mph slower absolute world speed record set straight-away course French Ferbois landplane 1924 following year another name des tined glory added records Supermarine S5 piloted S N Webster won 1927 Schneider world record pace 282 mph though no official record set Little month later deBernardi again time new Macchi M52s failed finish 1927 Schneider speed 29782 mph first true absolute world speed record set sea plane 1928 mark composed four passes over 3-km/l86-mi course raised 31846 mph deBernardi clipped-wing version M52 worlds fastest landplane now 50 mph behind times fading fast British returned vengeance Waghorn won 1929 Schneider Race new Supermarine S6 329 mph Orlebar set world 3-km record 3577 mph same machine few days later Italians seen handwriting wall surren dered genius R J Mitchell soon create immortal Spitfire out seaplane experience yet Macchi developed M67 power up M52s 1000-hp Fiat 1400 hp 18-cylinder threebank Isotta Fraschini come naught M67s crashed test flight other two failed finish 1929 Schneider Race Well aware 1931 Schneider would last long impor tant series British succeeded win ning third straight time men Macchi set work create clean est powerful airplane world ever seen achieve go radical design since conven Continued page 102 52 Model Aviation ground crew swarms over o 1 1 just betore averaged 4411577 tour dashes over 3km course 19344-1/2 years later its mark fell landplanethe Heinkel He100 464 mph will score high am static judg ing scale contest entries start maxmum points As see omitted details incorrect color markings points start deducted errors see between scale documentation model less will final static score So sure add obvi ous features show documen tation brings us subject proofof-scale documentation absence scale documentation part sev eral contestants recent scale contest made think article might some use would surprised times someone will enter con test just see model will rank against fellow modelers However same contestants will 3-view drawing will have nothing show chosen color scheme did exist full scale aircraft Without vital pieces paper judges can award craftsmanship points since can score maximum 30 points chances placing will dim Very few aircraft available model kits have subject magazine article book Model magazines constantly featuring articles about full-scale aircraft usually clude both 3-views photographs Color pictures less likely found mag azines books excep tions best proof scale source full-scale aircraft itself should present no problems Piper Cub some other aircraft proliferates local airport B-17 however likely found locally unless live Har lingen Texashome Confederate Air Force have access full-scale aircraft afternoon camera should produce necessary docu mentdtion Beware however poor film exposure discount processing colors print taken family instant camera developed local drug store may bear little resemblance actual sub ject Especially difficult photograph aircraft displayed museums lit fluor escent lights have discovered satis factory filter correct colors either daylight tungsten film used under fluo rescent lighting find own flash unit acceptable form lighting museum subject photographic presen tation used document sub ject recommend give judges minimum number pictures show major features prototype show close-ups details sure same details appear model An other reason build large scale details such venturis navigation lights fairings etc easier build large final note Take helper first scale contest Ill guarantee hands will shaking like yours product review product review product review flight line always start first flip engine wont give hint pop Count everything going wrong contest mind work out ahead time helper responsible what you will automatically prepared M acchi/Berliner continued page 52 tional ideas pretty well taken practical limits turn stretched out development period far beyond 1931 Schneider allowed British win opposition retire trophy lobby Royal Aero Club London Italians following route others attacking 3-km world speed record own ways Across Atlantic America mili tary pulled out speed race leav ing wide open civilians meant marvelous home-made machines thrilling nation National Air Races Craft like barrel-shaped GeeBee conventional Wedell Williams straining poor little hearts out trying hit 300 mph Shell Speed Dash small-time stuff men thinking terms 400 mph seaplanes 1000-hp P&W Wasps American racing scene excited mere toys compared Rolls Royce Fiat engines European counterparts using obviously needed reach strange new world 400 mph two basic routes could followed greater speed Radical air frames radical powerplants clear some major changes would have made Italians ever beat 358 mph 1900-hp Supermarine Radical racers never very suc cessful past still arent 1929 Piaggio Pc7 racer might have real record-breaker its retractable hydrofoils place pontoons never flew contemporary Savoia Marchetti 565 twin-boom affair 1000-hp engines either end central pod never de-bugged enough show its potential Still idea two engines fuse lage appealed Macchi works way combine greatly increased power limited drag singleengined airplane Together Fiat Company built type AS5 engine used previous successful seaplane racers Macchi created ultimate watercraft Macchi-Castoldi MC72 Aerodynamically just same philosophy Macchi done well past long thin fuselage minimum wings tiny windshield huge pontoons neatly faired struts sup porting powerplant another kettle fish 102 Model Aviation MR MODELER manufacture special ized accessories make R/C modeling easier never out stock items manufacture Seeyour deal er send first class stamp catalog sheets listing over 70 items complete pictures prices OVER 12 YEARS SERVICE FUEL IT FLIT IT N GO _ Other Davis Diesel Produc5a 0-Varnishing Brushes 020-60 0 Fuel Bulbs land 2 oz 1/2A Fuel Line Asst 1/4 l/2A Twin Exhaust Stax Send SASE literature - Deelee inquiries invited DIESEL CONVERTERS $995 Up 50% power 50% economy glow new fuel formula Fuel. Pt $350 Qt $500 $100 P & H f5iAsk/o ur dealer add $150 p&h L.J order direct Co nn Res add ST Davis Diesel Dewlopment Inc BOX 141 DEPT E MILFORD CT 06460 PHONE 203 877-1670 product review product review product review Prop Balancer have ever rigged pair razor blades mandrel balancing propellers welcome gadget Handy use allows balancing prop across short axis well usual long axis Can carried handily pocket use cap ends unscrewed cartridge-like case pin base set flat level surface cone piece threaded prop hole per instructions prop placed pin check balance Price $295 Du-Bro Products Inc 480 Bonner Rd Wauconda IL 60084 Basically two AS5s linked gether back-to-front crankcase two V-12s two entirely separate crankshafts revolving opposite directions geared propeller drive shaft located between cylinder banks forward 'engine~ drive shafts telescoped drove two-bladed prop revolved opposite directions thus comprising first contra-rotating propellers ever stalled airplane obvious external dif ferencetwo props centerlineand also clue biggest reason MC72 superior come before did permit full power 50-liter 3100 cu engine used eliminated awful effects torque caused other powerful racing seaplanes dig pon toon deep water power applied great sounding idea dif ferent enough men created along siege teething troubles supercharger fed both engines least successful part entire operation according Dr Vandone engineer charge development Fiat Its efficiency low 1931 rotor-shaft bearings problem friction clutch small compact either worked too well correct clutch slippage high speed different discs tried along kinds teeth pinion major problems faced men wanted go faster anyone else cooling engine fat radial stuck right out front wind could get no great challenge airplane in-line engine tightly cowled reduce drag cooling came very big headache Ordinary water wasnt up task keeping racing engine melting high rpm since ethylene-glycol just being developed USA wasnt available first Italians went another technique Skin sur face radiators far area could possibly achieved ordinary flow-through radiators managed keep temperature down manage able level long enough set speed records system no value mili tary commercial planes worked well enough short blast idea used effectively Curtiss Racers 1920s later used special Messerschmitt set landplane record 1939 soon faded out wings struts floats tail MC72 covered skin radi ators water oil no way increase cooling area relatively new ethylene-glycol tried coolant found unsatis factory installation Heat problems showed up first valves dif LJLJ r ~1 Fren PEA NO PEDPLE QUALITY KIT DESIGNED ESPECIALLY FOR THE NEW MINIATURE RADIOS L BUT EASY TO FLY SPECIFICATIONS WINGSPAN 25 INCHES POWER 020 GAS ENGINE RADIO MINIATURE 2-3 CHANNEL FLYING WT R TO 10 OZ KIT INCLUDES CUT BALSA AND PLYWOOD FORMED LANDING GEAR & CANOPY HARDWARE FOR CONTROLS KIT $1495 ASK AT YOUR LOCAL DEALER IF NOT AVAILABLE ORDER DIRECT ADD 75g PEANUT SCALE KITS AND HARD TO FIND ITEMSBROWN CO-2 ENGINES COMPLETE CATALOG 5O Peck.PeIvmesP 0 BOX 2498 -AMLA MESA CALIF 92041 WPHONE 17141 469-8675 1714 442-46362 ferent techniques tried cooling Small improvements made until cylinder heads redesigned did valves cool properly During tests 1000 valves made 12 different sets valve-springs-and-cam shafts tried test engines tests ran April June 1931 leaving just over two months until Schneider Trophy Race still problems ignition supply fuel-air mixture getting cylinders tests changes tests first AS6 engines fly MC72 left water June 22 low-com pression version final engine devel oping 2300 hp against hopedfor 3000 hp competition far ready back-fired first flight trouble its fuel pumps ran hot something wrong wires bracing wings too Any hope getting England Schnei der gone attention switched get ting three airplanes ready attack world speed record especially view events other countries new Supermarine S6B came through classy win final Schneider Race 340 mph wiped out absolute record 358 mph slashing 407 mph February 1932 MC72 its radical engine finally passed official Italian Government tests required five passes over simulated speed course high power British meanwhile decided let things go figuring 407 mph British airplane could possibly achieve until 1938 would begin think seriously about getting back race Cleveland 1932 Doolittle increased landplane record 294 mph GeeBee R-l Super Sportster unknow ingly demonstrated just far US behind Half year later usually quiet lake edge Italian Alps MC72 began show its stuff Piloted Warrant Officer Francesco Agello MC72s 2800-hp Fiat AS6 engine showed world indeed worth trouble four passes over 3-km course Lake Garda near Desenzano Agello averaged 42377 mph first three nearly-identical air planes serial-numbered 179 almost 50% faster fastest Ameri can airplane fastest landplane world come October Casinelli used same air plane set world speed record 100-km closed circuit 391 mph later same month third pilot Italian High-Speed Flight Scapinelli used #180 win first Coupe Bleriot aver aging 385 mph half hour Intended replacement Schnei der Bleriot Cup years fastest flight least 30 minutes go permanently first pilot averaged over 1000 kph 621 mph half hour pipe-dream time praiseworthy achievements MC72 attracted great acclaim Italian Air Force especially bombastic II DuceItalys dictator Benito Mussolini applause also went Gen Italo Balbo commander Regia Aeronautica later die under mys terious circumstances after running afoul Mussolini well Macchi Fiat directly respon sible splendid demonstration great extent Fascist politicians received greatest bene fit non-political cheers friends future foes alike somewhere along line Fascists screwed things up never officially admitted understandably solid reason believe civilian test pilot Simeone Marsone actually flew MC72 fastest Mussolini wanted credit go Air Force times never submitted FAI According very good source Marsone clocked amazing 475 mph sometime 1934 As 424-mph mark lasted year half Oct 23 1934 Fran cesco Agello again climbed MC72 prepared let er rip over Lake Garda time however #181 January1978 103 1/3 SIZE SR FALCON M kII LIBERTY BELL MODEL No 101 No 103 No104 No112 No118 No121 No 123 No124 No 125 No 131 No134 No 136 No 141 No146 No147 No149 No 151 No153 No165 No159 No 164 No165 No166 No168 No169 No 172 No 174 No 176 No177 No 178 No 160 No181 No183 No 184 No185 No186 No187 No188 No189 No 190 No191 No192 No193 No194 No195 No196 No197 No 198 No 199 No200 No201 No 202 No 203 No204 No205 No 206 No 207 No 208 FULLSIZE PLANS No 209 Seastrutz$450 RC bipe 3 channels 19 wheels pontoons No 210 Simplex$450 FF years development contest wns049/051 No211 Together IV$375 CL Somewhat large impressive stuntor 46 Consistent winner Short Seamew 40-powered Class Carrier model good prototype lends itself innovations $300 Kloud King 15-19 AC Old-Timer Free Flight based upon 1938 record breaker FF $400 Wiley Post Biplane Petite durable scale design forsither rubber tail wagger pulse rudder $225 Sneat Sport AC glider simple job thet can flown engine $275 GollyGeeWhz Dan Rutherfords simple Half-A powered Combat job turns dime $150 Gremlin Sturdy acrobatic AC biplane flies well 35s up 80s $300 4-Bits 40-powered AC 600 Club Racer has winning ways Good sport too $400 Semi-Pm Contest-winning HI glider hess pop-up tail dethermalizer $100 IlaIf-Korda rubber John Oldenkamps 112-size all-balsa Old-Timer $1 76 Gee Bee Model Y 40-powered AC stand-off scale great old-time racers. *600 Celliato superb Standard Class AC sailplane also took Nats first $400 Flaselar $torch AC scale model 23-45 5-channel has both slots flaps $400 Blackburn Monoplane AC Scale rendition history-maker wheels floats 40 engine $480 QuickSilver AC 1/2A Pylon Racer incorporates latest techniques $200 8-1 AC 15 USAF bomber full house Ace foam wings Stable $275 Comedian AC fun-fly acrobatic biplane good looker 40 80 $400 Nesmith Cougar FF rubber scale 30-in span Excellent design long flights $300 Cerberua AC 50-powered Pattern job retracts advanced features $475 Tellipsoar AC Standard Class sailplane wins stand-cdt performance $1000 Tercal Keith Trostlas /2A Cl Stunt ship flies excellent pattern $200 Pogo AC Formula Pylon racer deBolt based full-scale Owl $750 Midget Mustang CL 1975-1976 Nats winning Goodyear byJohn Ballard $200 Nothing Fancy AC biplane 35 engines pretty handles beautifully $825 Simiter AC apectaculer flying-wing 15 fin-mounted tractor $300 Dennyplane AC version famed cabin model kit 193719-25 $400 Tutorn AC Cabin model scale-like performance 25-35 $325 Iron Dog AC Quarter Midget Bell Airacobra has won Pylon contests $400 Qua dCoupe rubber power $his attraqtive Coupe has excellent performance $300 Zonker AC canard hastltt5fllIItii~r 40 power$300 Country Boy FF JirnCteriv thbrougbbred/09/5 1 1/2A $300 Bristol Scout AC 02 power scale pulse rudder small radios $200 Bed Chock Charlie AC Scale model Russian PT trainer 09/15 $300 Answer AC FF cabin 02 sized Replica Old-Timer $175 SevIlle AC Sport low-wing sailplane 80 wing has excellent performance $350 Chester Slow CL Slow Combat model Dan Rutherford frequent winner $275 Fancy Pants AC Sport/Aerobatic low-wing has ply-skin fuselage 25s 45s $480 BiVSoy FF Unlimited Class rubber model no frills great performer $300 Rockette FF model Jetex-type power isa Nationals winner $150 Vintage 11 AC Antique type old-time open fuse construction 60 $475 Snake CL Rat racerby Dick Lambartlatest state art $200 Mountaineer AC Slope Soarer Clarence Haughtgood can get $375 Chipmunk AC Scale winner 1976 World Championships Nets $900 Stiletto CL stunt model McDonald winner 1976 FAI World Champs $375 Vol Ubre FF rubber-powered Wakefield Bob White Great winner $275 Hats Biplane AC aerobatic scale job takes 40/50 built-in muffler $475 Mirage Sharwood Buckataffs Fast Combattwice Nats winner $250 Fokker T-2 Nets winning FF scale electric poweredAstro 02 etc $275 Sporteter AC deBolt wing choice aerobatics/racing *375 P3 AC Cox 09 Ace foam wings step up 049 jobs $350 Ole Reliable CL Formula 40 speed job Snyders Nets winner $175 Roll Out FF hand-launch glider has pop-up dethermalizer $100 Avenger CL profile 049 uses sheet wing maneuverable $160 PokkerDVIII AC 45 60 Two sheets 2-1/2 scale $900 Cardboard Douglas M-2 CL 50 biplane 40power less $10 expense $600 Rock AC aerobatics 19-40 engines Simple tail-dragger $360 Air Camper FF Pisetanpol 1/2A Charming old-timer 2-sheets $300 Uvesay DL 5 AC English honiebuilt 3-clmen. 16s Exotic easy Good flier $500 Swinger CL 1 /2A all-balsa swing-wing Fly fun use experiments $2 00 Circle numbers plans wish order 104112118121 147149151153 174176177178 189190191192 201202203204 Please print carefully 101 103 123124125131134136141146 155159164165166168169172 180181183184185186187188 193194195196197198199200 205206207208209210211 Enclosed $ NAME CITY 710 STATE Price includes first-class postage Send check money order payable ModelAviation AMA 815 Fifteenth St. NW Washington DC 20005 smaller lighter floats engine up its full 3100 hp about 200 hp absorbed supercharger times 3-km dashes 1529 sec 1519 sec 1518 sec 1523 sec speed figured out 440677 mph far short 475 mph may have achieved civilian filed accepted FAI remains almost 43 years later highest official speed ever attained prop-driven seaplane 41/2 years after Agello set MC72s record remained absolute world mark airplanes types until Hans Dieterle flew 464 mph pro totype Heinkel He-l00 did landplane fly faster greatest racing seaplanes World War II understandably tough military racing airplanes He-l00 ferocious Me-209 barely beat its record few days later both inno cent victims Allied bombing raids fuselage Me-209 remains Polish museum final record-holding Macchi-Castoldi 72 however managed get through some very trying years Today #181 Caproni Aeronautical Muse um Milan Italy looking beautiful powerful unbelievably fast did 1934 caused aviation world shake its head wonder Editors Note press time information received source expert MC 72 aircraft two ships also lost training ADVERTISERS INDEX Ace Radio Control ndrews Aircraft Model Co ove rite28 94 Cox Hobbies Inc15 Davis Diesel Development102 Du-Bro Products3 EK-Logictrol7 Flyline Models96 Fox Mfg Company7 Carl Goldberg Models20 Grish Brothers88 Helmut Bernhardt99 Hobby Hideaway100 Hobbypoxy91 K&B Mfg85 Kraft Great Lakes Inc97 Midwest Model Products6 Morrison Repla-Tech100 Pactra Industries83 Peck-Polymers103 Progress Mfg Company86 Pylon Publications92 R/C Buyers Guide93 Rocket City Specialties102 Sig Mfg Company1 Sterling Models Inc5 Tatone Products Inc87 Top Flite Models Inc81 Westport International89 Williams Brothers90 World EnginesBack Cover 104 Model Aviation
Edition: Model Aviation - 1978/01
Page Numbers: 49, 50, 51, 52, 102, 103, 104
Hanging Caproni Aeronautical Museum Milan Italy torys memorable flying machines 3100-hp seaplane set absolute speed record 440677 mph Far faster landplane its day tandem-engined marvel clocked unoffi cially 475 mph 1934 still holds speed record seaplanes U Don Berliner FOR DOZEN YEARS Lind berghs transatlantic flight until World War II about begin fastest air planes world seaplanes GeeBee racers jazzy little Army Air Corps pursuits special experimental craft water-borne machines huge Top Two three MC 72s built 1931 Schneider Trophy Race Late 1932 No 180 flown three different pilots averaged 42377 mph over 3-km course set closed-circuit mark 391 mph over 100-km course won First Bleriot Cup averaging 385 mph half hour Cowl removed ship foreground reveals huge 24-cylinder Fiat en gineactually two AS 6 racing engines back back single crankcase Above rest water No 181 shows advantage contra-rotating props some skin radiators covered wings fuselage sides floats wide float struts January1978 49 NOrE THAT TAPER IN WING THICKNESS BEGINS AT SECTION Wi SEE PLAN PEAT SIDES FRQI HERE APT Drawings byJ H Robinson MODEL AV/AION SCALE f-O MACCH MC 72 0153 50 Model Aviation OLJRAL PANEL ON UNDERSIDE ONLY F-8 TYPICAL SECTION STRUT SECTION COLOURS OVERALL -- CRIMSON COOLANT & _ _ -BRASS OIL RADIATORS FLOAT UNOERSIDES TAIL LEGEND FTC SPINNERS PROPELLERSNATURAL WINGTIPS METAL AILERONS BRACING RUDDER AR/GI-IT GREEN STRIPING WI/lit SCARLET CARBURETTOR Il-ifAKE BLACK INSPECTION DOORS DURAL TO OIL COOLER --V THIS DRAWING SHOWS 107 AT THE 7934 PARIS SALON FOLLOWING THE RECORD QF 23-70 - PRESENT NODII7CA TIONS INCILIDE SHORTENED UNDER-FIN 0 MINOR CHANGES 70 PAINT FINISH 779 0 TAO WERE FITTED WITH LONGER FLOATS 0 VENTRAL COOLANT RADIATOR BUT OlD NOT ORIGINALLY HAVE EITHER THE EXTENDED UNDER FIN OR TUNNEL CARBURETTOR INTAKE 1SF t 21 T2 Wt TYPICAL SECT/ON EXTENDS TO ROOT 7 TB INCIDENCE IS CONSTANT s-ITYPICAL SECTION SIDES OF ELEVATORS ARE FLAT F 5 v ~F F F 5 DA TA 949On WING CHORD7-73O WiNG AREA NETT OVERALL LENGTH0610 , FUSELAGE LENGTHS* --- 0350 m FLOAT LENGTH** _ _ 6575 _ FLOAT TRACK2700, STABILIZER SPANS2920, PROPELLER 0/AMS59O EMPTY WEIGHT2500kg LOADED WEIGHT - -2 907kg *INCLUD/NG EXTENDED UNDER-FIN **EXCLUO/NG MOORING RINGS F-b 3I 11 5-W /67 /52 274 a- IOt5 9-7~ a- 6 s S2 Ii 64/0 II F-It R-I F8 7 I-I IT LEGEND January 1978 51 F-JF-4F-SF-6F-6A IF 11 [ U-ULJ jJ worked Telescoped propeller shafts passed between cylinder banks forward unit shaft driven via gear train engine Super charger aft end fed both units consumed 200 hp 3100 hp developed Photographs T C Weaver collection pontoons hanging below seeming contradiction known about streamlining two main reasons Schneider Trophy become politically important governments willing spend vast amounts money develop unlimited racing seaplanes demonstration technol ogy two Only endless water run ways long enough airplanes small high-speed wings take off days wide 10000-ft concrete strips 747s far future get off water penalty paid form pontoons sight two devices almost large fuselage hanging belly strikes terror heart modern designer helped considerably hurt several years during reign seaplane worlds fastest landplane 100 mph slower best its water cousins Thanks impetus magnifi cent Schneider Trophy US start ed trend series C irtiss military racers led ultii sleek two-wingers d Pulitzer Schneider rt 1920s bringing fame si Doolittle Curtiss R2 play National Air & S no matter sI can t answer 1 lems speed s parts struts holding double needed wing-ft course silly seco did offer advantages re improvements metals design about spell th plane race all-out s first turn theory Italians start c become historic series planes Macchi woi 1926 great extent Curtiss racer place ti its struts few iate biplanes minated es mid ch Jimmy -2 dis ace Museum e biplanes Itimate prob uck too n extra wing elage joints d wing uced weight md structural end bi eed reality what f racing seacs M39 monoplane e upper wing lim wires brace thin single wing placed low Curtiss-like fuselage Mario de Bernardi pilot three M39s won 1926 Schneider 264 mph barely 12 mph slower absolute world speed record set straight-away course French Ferbois landplane 1924 following year another name des tined glory added records Supermarine S5 piloted S N Webster won 1927 Schneider world record pace 282 mph though no official record set Little month later deBernardi again time new Macchi M52s failed finish 1927 Schneider speed 29782 mph first true absolute world speed record set sea plane 1928 mark composed four passes over 3-km/l86-mi course raised 31846 mph deBernardi clipped-wing version M52 worlds fastest landplane now 50 mph behind times fading fast British returned vengeance Waghorn won 1929 Schneider Race new Supermarine S6 329 mph Orlebar set world 3-km record 3577 mph same machine few days later Italians seen handwriting wall surren dered genius R J Mitchell soon create immortal Spitfire out seaplane experience yet Macchi developed M67 power up M52s 1000-hp Fiat 1400 hp 18-cylinder threebank Isotta Fraschini come naught M67s crashed test flight other two failed finish 1929 Schneider Race Well aware 1931 Schneider would last long impor tant series British succeeded win ning third straight time men Macchi set work create clean est powerful airplane world ever seen achieve go radical design since conven Continued page 102 52 Model Aviation ground crew swarms over o 1 1 just betore averaged 4411577 tour dashes over 3km course 19344-1/2 years later its mark fell landplanethe Heinkel He100 464 mph will score high am static judg ing scale contest entries start maxmum points As see omitted details incorrect color markings points start deducted errors see between scale documentation model less will final static score So sure add obvi ous features show documen tation brings us subject proofof-scale documentation absence scale documentation part sev eral contestants recent scale contest made think article might some use would surprised times someone will enter con test just see model will rank against fellow modelers However same contestants will 3-view drawing will have nothing show chosen color scheme did exist full scale aircraft Without vital pieces paper judges can award craftsmanship points since can score maximum 30 points chances placing will dim Very few aircraft available model kits have subject magazine article book Model magazines constantly featuring articles about full-scale aircraft usually clude both 3-views photographs Color pictures less likely found mag azines books excep tions best proof scale source full-scale aircraft itself should present no problems Piper Cub some other aircraft proliferates local airport B-17 however likely found locally unless live Har lingen Texashome Confederate Air Force have access full-scale aircraft afternoon camera should produce necessary docu mentdtion Beware however poor film exposure discount processing colors print taken family instant camera developed local drug store may bear little resemblance actual sub ject Especially difficult photograph aircraft displayed museums lit fluor escent lights have discovered satis factory filter correct colors either daylight tungsten film used under fluo rescent lighting find own flash unit acceptable form lighting museum subject photographic presen tation used document sub ject recommend give judges minimum number pictures show major features prototype show close-ups details sure same details appear model An other reason build large scale details such venturis navigation lights fairings etc easier build large final note Take helper first scale contest Ill guarantee hands will shaking like yours product review product review product review flight line always start first flip engine wont give hint pop Count everything going wrong contest mind work out ahead time helper responsible what you will automatically prepared M acchi/Berliner continued page 52 tional ideas pretty well taken practical limits turn stretched out development period far beyond 1931 Schneider allowed British win opposition retire trophy lobby Royal Aero Club London Italians following route others attacking 3-km world speed record own ways Across Atlantic America mili tary pulled out speed race leav ing wide open civilians meant marvelous home-made machines thrilling nation National Air Races Craft like barrel-shaped GeeBee conventional Wedell Williams straining poor little hearts out trying hit 300 mph Shell Speed Dash small-time stuff men thinking terms 400 mph seaplanes 1000-hp P&W Wasps American racing scene excited mere toys compared Rolls Royce Fiat engines European counterparts using obviously needed reach strange new world 400 mph two basic routes could followed greater speed Radical air frames radical powerplants clear some major changes would have made Italians ever beat 358 mph 1900-hp Supermarine Radical racers never very suc cessful past still arent 1929 Piaggio Pc7 racer might have real record-breaker its retractable hydrofoils place pontoons never flew contemporary Savoia Marchetti 565 twin-boom affair 1000-hp engines either end central pod never de-bugged enough show its potential Still idea two engines fuse lage appealed Macchi works way combine greatly increased power limited drag singleengined airplane Together Fiat Company built type AS5 engine used previous successful seaplane racers Macchi created ultimate watercraft Macchi-Castoldi MC72 Aerodynamically just same philosophy Macchi done well past long thin fuselage minimum wings tiny windshield huge pontoons neatly faired struts sup porting powerplant another kettle fish 102 Model Aviation MR MODELER manufacture special ized accessories make R/C modeling easier never out stock items manufacture Seeyour deal er send first class stamp catalog sheets listing over 70 items complete pictures prices OVER 12 YEARS SERVICE FUEL IT FLIT IT N GO _ Other Davis Diesel Produc5a 0-Varnishing Brushes 020-60 0 Fuel Bulbs land 2 oz 1/2A Fuel Line Asst 1/4 l/2A Twin Exhaust Stax Send SASE literature - Deelee inquiries invited DIESEL CONVERTERS $995 Up 50% power 50% economy glow new fuel formula Fuel. Pt $350 Qt $500 $100 P & H f5iAsk/o ur dealer add $150 p&h L.J order direct Co nn Res add ST Davis Diesel Dewlopment Inc BOX 141 DEPT E MILFORD CT 06460 PHONE 203 877-1670 product review product review product review Prop Balancer have ever rigged pair razor blades mandrel balancing propellers welcome gadget Handy use allows balancing prop across short axis well usual long axis Can carried handily pocket use cap ends unscrewed cartridge-like case pin base set flat level surface cone piece threaded prop hole per instructions prop placed pin check balance Price $295 Du-Bro Products Inc 480 Bonner Rd Wauconda IL 60084 Basically two AS5s linked gether back-to-front crankcase two V-12s two entirely separate crankshafts revolving opposite directions geared propeller drive shaft located between cylinder banks forward 'engine~ drive shafts telescoped drove two-bladed prop revolved opposite directions thus comprising first contra-rotating propellers ever stalled airplane obvious external dif ferencetwo props centerlineand also clue biggest reason MC72 superior come before did permit full power 50-liter 3100 cu engine used eliminated awful effects torque caused other powerful racing seaplanes dig pon toon deep water power applied great sounding idea dif ferent enough men created along siege teething troubles supercharger fed both engines least successful part entire operation according Dr Vandone engineer charge development Fiat Its efficiency low 1931 rotor-shaft bearings problem friction clutch small compact either worked too well correct clutch slippage high speed different discs tried along kinds teeth pinion major problems faced men wanted go faster anyone else cooling engine fat radial stuck right out front wind could get no great challenge airplane in-line engine tightly cowled reduce drag cooling came very big headache Ordinary water wasnt up task keeping racing engine melting high rpm since ethylene-glycol just being developed USA wasnt available first Italians went another technique Skin sur face radiators far area could possibly achieved ordinary flow-through radiators managed keep temperature down manage able level long enough set speed records system no value mili tary commercial planes worked well enough short blast idea used effectively Curtiss Racers 1920s later used special Messerschmitt set landplane record 1939 soon faded out wings struts floats tail MC72 covered skin radi ators water oil no way increase cooling area relatively new ethylene-glycol tried coolant found unsatis factory installation Heat problems showed up first valves dif LJLJ r ~1 Fren PEA NO PEDPLE QUALITY KIT DESIGNED ESPECIALLY FOR THE NEW MINIATURE RADIOS L BUT EASY TO FLY SPECIFICATIONS WINGSPAN 25 INCHES POWER 020 GAS ENGINE RADIO MINIATURE 2-3 CHANNEL FLYING WT R TO 10 OZ KIT INCLUDES CUT BALSA AND PLYWOOD FORMED LANDING GEAR & CANOPY HARDWARE FOR CONTROLS KIT $1495 ASK AT YOUR LOCAL DEALER IF NOT AVAILABLE ORDER DIRECT ADD 75g PEANUT SCALE KITS AND HARD TO FIND ITEMSBROWN CO-2 ENGINES COMPLETE CATALOG 5O Peck.PeIvmesP 0 BOX 2498 -AMLA MESA CALIF 92041 WPHONE 17141 469-8675 1714 442-46362 ferent techniques tried cooling Small improvements made until cylinder heads redesigned did valves cool properly During tests 1000 valves made 12 different sets valve-springs-and-cam shafts tried test engines tests ran April June 1931 leaving just over two months until Schneider Trophy Race still problems ignition supply fuel-air mixture getting cylinders tests changes tests first AS6 engines fly MC72 left water June 22 low-com pression version final engine devel oping 2300 hp against hopedfor 3000 hp competition far ready back-fired first flight trouble its fuel pumps ran hot something wrong wires bracing wings too Any hope getting England Schnei der gone attention switched get ting three airplanes ready attack world speed record especially view events other countries new Supermarine S6B came through classy win final Schneider Race 340 mph wiped out absolute record 358 mph slashing 407 mph February 1932 MC72 its radical engine finally passed official Italian Government tests required five passes over simulated speed course high power British meanwhile decided let things go figuring 407 mph British airplane could possibly achieve until 1938 would begin think seriously about getting back race Cleveland 1932 Doolittle increased landplane record 294 mph GeeBee R-l Super Sportster unknow ingly demonstrated just far US behind Half year later usually quiet lake edge Italian Alps MC72 began show its stuff Piloted Warrant Officer Francesco Agello MC72s 2800-hp Fiat AS6 engine showed world indeed worth trouble four passes over 3-km course Lake Garda near Desenzano Agello averaged 42377 mph first three nearly-identical air planes serial-numbered 179 almost 50% faster fastest Ameri can airplane fastest landplane world come October Casinelli used same air plane set world speed record 100-km closed circuit 391 mph later same month third pilot Italian High-Speed Flight Scapinelli used #180 win first Coupe Bleriot aver aging 385 mph half hour Intended replacement Schnei der Bleriot Cup years fastest flight least 30 minutes go permanently first pilot averaged over 1000 kph 621 mph half hour pipe-dream time praiseworthy achievements MC72 attracted great acclaim Italian Air Force especially bombastic II DuceItalys dictator Benito Mussolini applause also went Gen Italo Balbo commander Regia Aeronautica later die under mys terious circumstances after running afoul Mussolini well Macchi Fiat directly respon sible splendid demonstration great extent Fascist politicians received greatest bene fit non-political cheers friends future foes alike somewhere along line Fascists screwed things up never officially admitted understandably solid reason believe civilian test pilot Simeone Marsone actually flew MC72 fastest Mussolini wanted credit go Air Force times never submitted FAI According very good source Marsone clocked amazing 475 mph sometime 1934 As 424-mph mark lasted year half Oct 23 1934 Fran cesco Agello again climbed MC72 prepared let er rip over Lake Garda time however #181 January1978 103 1/3 SIZE SR FALCON M kII LIBERTY BELL MODEL No 101 No 103 No104 No112 No118 No121 No 123 No124 No 125 No 131 No134 No 136 No 141 No146 No147 No149 No 151 No153 No165 No159 No 164 No165 No166 No168 No169 No 172 No 174 No 176 No177 No 178 No 160 No181 No183 No 184 No185 No186 No187 No188 No189 No 190 No191 No192 No193 No194 No195 No196 No197 No 198 No 199 No200 No201 No 202 No 203 No204 No205 No 206 No 207 No 208 FULLSIZE PLANS No 209 Seastrutz$450 RC bipe 3 channels 19 wheels pontoons No 210 Simplex$450 FF years development contest wns049/051 No211 Together IV$375 CL Somewhat large impressive stuntor 46 Consistent winner Short Seamew 40-powered Class Carrier model good prototype lends itself innovations $300 Kloud King 15-19 AC Old-Timer Free Flight based upon 1938 record breaker FF $400 Wiley Post Biplane Petite durable scale design forsither rubber tail wagger pulse rudder $225 Sneat Sport AC glider simple job thet can flown engine $275 GollyGeeWhz Dan Rutherfords simple Half-A powered Combat job turns dime $150 Gremlin Sturdy acrobatic AC biplane flies well 35s up 80s $300 4-Bits 40-powered AC 600 Club Racer has winning ways Good sport too $400 Semi-Pm Contest-winning HI glider hess pop-up tail dethermalizer $100 IlaIf-Korda rubber John Oldenkamps 112-size all-balsa Old-Timer $1 76 Gee Bee Model Y 40-powered AC stand-off scale great old-time racers. *600 Celliato superb Standard Class AC sailplane also took Nats first $400 Flaselar $torch AC scale model 23-45 5-channel has both slots flaps $400 Blackburn Monoplane AC Scale rendition history-maker wheels floats 40 engine $480 QuickSilver AC 1/2A Pylon Racer incorporates latest techniques $200 8-1 AC 15 USAF bomber full house Ace foam wings Stable $275 Comedian AC fun-fly acrobatic biplane good looker 40 80 $400 Nesmith Cougar FF rubber scale 30-in span Excellent design long flights $300 Cerberua AC 50-powered Pattern job retracts advanced features $475 Tellipsoar AC Standard Class sailplane wins stand-cdt performance $1000 Tercal Keith Trostlas /2A Cl Stunt ship flies excellent pattern $200 Pogo AC Formula Pylon racer deBolt based full-scale Owl $750 Midget Mustang CL 1975-1976 Nats winning Goodyear byJohn Ballard $200 Nothing Fancy AC biplane 35 engines pretty handles beautifully $825 Simiter AC apectaculer flying-wing 15 fin-mounted tractor $300 Dennyplane AC version famed cabin model kit 193719-25 $400 Tutorn AC Cabin model scale-like performance 25-35 $325 Iron Dog AC Quarter Midget Bell Airacobra has won Pylon contests $400 Qua dCoupe rubber power $his attraqtive Coupe has excellent performance $300 Zonker AC canard hastltt5fllIItii~r 40 power$300 Country Boy FF JirnCteriv thbrougbbred/09/5 1 1/2A $300 Bristol Scout AC 02 power scale pulse rudder small radios $200 Bed Chock Charlie AC Scale model Russian PT trainer 09/15 $300 Answer AC FF cabin 02 sized Replica Old-Timer $175 SevIlle AC Sport low-wing sailplane 80 wing has excellent performance $350 Chester Slow CL Slow Combat model Dan Rutherford frequent winner $275 Fancy Pants AC Sport/Aerobatic low-wing has ply-skin fuselage 25s 45s $480 BiVSoy FF Unlimited Class rubber model no frills great performer $300 Rockette FF model Jetex-type power isa Nationals winner $150 Vintage 11 AC Antique type old-time open fuse construction 60 $475 Snake CL Rat racerby Dick Lambartlatest state art $200 Mountaineer AC Slope Soarer Clarence Haughtgood can get $375 Chipmunk AC Scale winner 1976 World Championships Nets $900 Stiletto CL stunt model McDonald winner 1976 FAI World Champs $375 Vol Ubre FF rubber-powered Wakefield Bob White Great winner $275 Hats Biplane AC aerobatic scale job takes 40/50 built-in muffler $475 Mirage Sharwood Buckataffs Fast Combattwice Nats winner $250 Fokker T-2 Nets winning FF scale electric poweredAstro 02 etc $275 Sporteter AC deBolt wing choice aerobatics/racing *375 P3 AC Cox 09 Ace foam wings step up 049 jobs $350 Ole Reliable CL Formula 40 speed job Snyders Nets winner $175 Roll Out FF hand-launch glider has pop-up dethermalizer $100 Avenger CL profile 049 uses sheet wing maneuverable $160 PokkerDVIII AC 45 60 Two sheets 2-1/2 scale $900 Cardboard Douglas M-2 CL 50 biplane 40power less $10 expense $600 Rock AC aerobatics 19-40 engines Simple tail-dragger $360 Air Camper FF Pisetanpol 1/2A Charming old-timer 2-sheets $300 Uvesay DL 5 AC English honiebuilt 3-clmen. 16s Exotic easy Good flier $500 Swinger CL 1 /2A all-balsa swing-wing Fly fun use experiments $2 00 Circle numbers plans wish order 104112118121 147149151153 174176177178 189190191192 201202203204 Please print carefully 101 103 123124125131134136141146 155159164165166168169172 180181183184185186187188 193194195196197198199200 205206207208209210211 Enclosed $ NAME CITY 710 STATE Price includes first-class postage Send check money order payable ModelAviation AMA 815 Fifteenth St. NW Washington DC 20005 smaller lighter floats engine up its full 3100 hp about 200 hp absorbed supercharger times 3-km dashes 1529 sec 1519 sec 1518 sec 1523 sec speed figured out 440677 mph far short 475 mph may have achieved civilian filed accepted FAI remains almost 43 years later highest official speed ever attained prop-driven seaplane 41/2 years after Agello set MC72s record remained absolute world mark airplanes types until Hans Dieterle flew 464 mph pro totype Heinkel He-l00 did landplane fly faster greatest racing seaplanes World War II understandably tough military racing airplanes He-l00 ferocious Me-209 barely beat its record few days later both inno cent victims Allied bombing raids fuselage Me-209 remains Polish museum final record-holding Macchi-Castoldi 72 however managed get through some very trying years Today #181 Caproni Aeronautical Muse um Milan Italy looking beautiful powerful unbelievably fast did 1934 caused aviation world shake its head wonder Editors Note press time information received source expert MC 72 aircraft two ships also lost training ADVERTISERS INDEX Ace Radio Control ndrews Aircraft Model Co ove rite28 94 Cox Hobbies Inc15 Davis Diesel Development102 Du-Bro Products3 EK-Logictrol7 Flyline Models96 Fox Mfg Company7 Carl Goldberg Models20 Grish Brothers88 Helmut Bernhardt99 Hobby Hideaway100 Hobbypoxy91 K&B Mfg85 Kraft Great Lakes Inc97 Midwest Model Products6 Morrison Repla-Tech100 Pactra Industries83 Peck-Polymers103 Progress Mfg Company86 Pylon Publications92 R/C Buyers Guide93 Rocket City Specialties102 Sig Mfg Company1 Sterling Models Inc5 Tatone Products Inc87 Top Flite Models Inc81 Westport International89 Williams Brothers90 World EnginesBack Cover 104 Model Aviation