In foreground engine No 3 has disassembled show internal elements wnicn generate rotation i-or compiete unoerstanaing lOOK other illustrations read text Behind engine No 5 Authors early ducted-fan work provided impetus new engine shape WHAT DO YOU GET cross rotary engine regular engine get Cam-Axial engine What ask Basically engine piston rotates well reciprocates author has developed patented new mechanical cycle does re quire usual connecting rodcrankshaft/ piston relationship presently employed internal combustion engines cause shaft rotate having piston rotate need crank-type shaft connecting rod eliminated Before detailing accom plished brief explanation came about might order 1958 idea ducted-fan-type propulsion system stirred imagination small 24-inch-span Free Flight model powered Cox 02 engine four bladed fan inside duct made foam coffee cup designed built model flew well showing sufficient power good rate climb mood followed other duct designs power pods Working ducted fans brought about desire find engine would lend itself better ducted-fan shrouded-propeller design Without going lengthy description opinion available engines difficult mount presented too much disturbance airflow within duct Needed engine having streamlined shape center duct TQ knowledge have twoengines type May1983 43 Engine No 5 latest authors series machined castings Only engine piston motion line shaft known have marketed apparently little success marketed apparently much success other standard en gine gear box change direction uf output shaft What looking something simple straightforward gears few ideas came plastic model later produced brick-type engine some proportions seemed about right gave feeling wanted run next step convert findings refined model prove disprove notion engine configuration would really run / N 0 Co V Cj Shaft End \ 1 75 dia N ) Weight 9% oz __ V 495 0 ElK Look drawings imagine neat installations models can made Cam-Axial engine Castings used head cylinder shaft housing Its 24 cu After some drafting much time effort spent trying find shops make parts wound up having remake some Eventually went together result very gratifying engine did run members Roswell Air Force Club Im member attendance meeting demon strated will attest fact will other people have also witnessed its running since After successful operation first engine convinced least mechanical standpoint arrangement could have some merit though would re quire development time precautionary step 44 Model Aviation exploded view drawings used patent filingwhich resulted suance patent No 4366784 items aside carburetor prop nut washer glow plug machine screws standard model airplane engine use engine really works ii N author/inventor Paul nis arawing boardholding latest Cam-Axial engine first operational left Cutaway basic Cam-Axial engine com ponents can wonder present what its future will though author notes number possibilities text drawings show important difference between Cam-Axial engine others Cam-Axial above note constant moment arm force M applied two places around shaft center cranktype belowl changing moment arm 0 stroke/2 produces wasteful side forces \ Side Force - On Piston t 7 C M prevent possible infringement some ones patent safeguard idea 1 decided good time try see patent would possible found patent attorney subsequently US Patent No 4366784 issued patent application being formulated being processed went ahead new ideas improving en gine made pattern cylinder head shaft housing help friend two sets aluminum castings made work out improvements machining procedures first made another plastic model experience able machine parts myself / Ill - / 7 / 7/ /U 1 /7/ Fortunately able obtain used Atlas lathe go along small Sears lathe old drill press Probably difficult part making engines figure out just go about machining parts necessary pre-plan operation ad vance assure success couldnt afford spoil castings other parts because difficulty time involved get re placements Various small tools fixtures setups used also made good advantage engine works may help refer photos drawings engine cam-induced piston rotation directly drives output shaft Two piston power strokes produce complete 3600 rotation shaft other words revolution Continued page 48 L;~ upper drawing position piston shaft fuel induction lower drawing burnt fuel exhausted fresh fuel mixture bypassed combustion chamber May 1983 45 M -J N Shaft M Happily purring away authors first opera tional engine piston rotates recipro cates Its new principle Still Using bid Fashioned L4/ing Hinges s SS well gain control efficiency eliminating gap between moveable nd stationary control surfaces will amazed performance gained using simple inexpen sive improvement FREE MOVEMENT 450 STRONG AND LIGHTWEIGHT COMPLETELY FUELPROOF COMPATABLE WITH ALL IRON-ON MATER IALS COMES IN 3 FT LENGTHS SMALL 1808PRICE 3 ft $250 LARGE 14 Introducing $295 T0DIGGER PATENT PENDING Tempered Steel HInge Slotting Centering Tool dealer order direct ~add 300 shipping w ELDON J LIND COMPANY 2912 Walker Lee Los Alamitos CA 90720 U MO0l Aviation Simplifies Control Svr face Hfnging EASYTO INSTALL INSTALL IIWGE OSE IGHT PIN TO MAKE -SM4LL ROLE EVERY il/CR OR SO OR/P CYAAOACRYLATE GLLE IN HOLES CAPILLARY ACOON WILL CARRY GLUE A/ORG FRY/PR JO/NT -3 FOR ADDITIONAL SEOJRITi P/SE/PT SMALL PIN EVERY FEW INCHESCUT OFF FLUSII FILL AND SAND AS NEEDED FOR FIPISRING Send Free Info fine products FOURMOST PRODUCTS 4040 24th Avenue Forest Grove OR 97116 t CUT 1/4 DEEP SLIT ALOND TAR F/ILL LENGTH LR THE MATING NJRFACES Cam-Axial/Paul Continued paqe 45 shaft equivalent revolution two-cylinder conventional engine Axial mo tion piston transmitted output shaft permits simple effec tive fuel-air induction exhaust similar two-stroke engines used power mod els Basic components Cam-Axial en gine cylinder head shaft housing cam-track liner piston two cam fol lowers output shaft exhaust stacks car buretor ignition device necessary hardware course carburetor ig nition device available numerous sources unique Cam-Axial engine induction fuel-air mixture output shaft has axially bored hole cross hole registers passageway housing carburetor piston moving toward combustion chamber head end Bypass exhaust ports liner cylinder register other uncovered piston nears its position away com bustion chamber non-reciprocating output shaft model has square cross section piston square hole slides axially back forth As piston reciprocates cam track imparts rotational motion both piston output shaft Sequence operation follows As piston moves inside liner toward head partial vacuum chamber tween housing piston draws fuel-air mixture takes place shaft intake port registration induction passage leading car buretor Continued piston movement toward head compresses fuel mixture Proper ignition takes place optimum com pression piston position pushing pis ton away head pistons camfollowing rollers restricted liners cam track thus causing pistonand consequently output shaftto rotate As piston moves toward housing both exhaust bypass ports un covered top piston allows exhaust gas venting since shaft rota tion has taken induction ports out registration fuel-air mixture drawn now compressed pushed up cam track bypassed com bustion chamber burned gases ex hausted out takes place output shaft rotates l80 induction com pression power exhaust cycle Once through cycle have com plete 360 rotation shaft two power strokes per revolution shaft piston has two cam follower rollers spaced 1 800 apart attached near end opposite combustion end cam track sinusoidal configuration gives static rotationally balanced unit responsible achieving two power strokes revolution shaftContinued page 148 DMC LABS Helicopter Fuselage Kits True Scale Design Necessary Hardware Lightweight Epexyglass Highest Quality Bell 222 Hughes 500 D-60Fits Heliboy Competitor Kavan Kalt Hughes 500 D-40Fits Miniboy KaIt -20 Custom Fabrication & Tooling Available Manufacturers Dealer & Manufacturers Inquiries Welcome See Us MACS Show Under N ship Since June 1 1981 Ralph Roppo President DC - -cJ SW 41st St Renton WA 98055 2C4-251-9553 Bell 222 GAPLESS HiNGE SLOTTER Simplifies installation Gapless Hinges Makes 51515 4 Sizes Balsa E $250 GRAPHICS THE ROLLS ROYCE OF NUMBERS & LETTERS THEY STAY ON EVEN WHEN DRENCHEDU WITH FUEL MICRO-THIN CAST VINYL PEEL EM OFF & STICK EM ONI bylonRdsL 19044 USA THE new POWRTOW WINCH ZIP & LONGER BATTERY LIFE Power size sailplane current draw -kiting & manual drum brakes adjustable speed parachute turn-a round foot switch 115 lb braided line use iith RETRIEVER launch-a-minute flightsan end line shagging delays line crossings drag free operation tangles heavy-duty cables Clips braided 301blinetow ribbonhand switch line guides ball bearing swivels DAVEY SYSTEMS CORPORATION ONE ROOD LANEMALVEEN PA 19355 215644-0692 Write call information Cam-Axial/Paul Continued page 48 Although first engines have conceived model airplane propulsion units mind little imagination can lead visualize other uses Since dont see need new technologies material processes should production pos sibilities utilizing latest materials methods Using current state art equiv alent present-day engine manufacturing would expect some Cam-Axial engine possible advantages might include horsepower per unit weight horse power per displacement smoother oper ation multi-cylinder configurations possible conventional engines because reduction side forces piston caused crank angle connecting rod twice power pulses natural lubri cation cam track followers pis ton shaft less dead volume between piston housing giving better pumping action cam track configuration does have harmonic can programconfigured apply power shaft rotation relative rest cycle Another possibly advantageous difference relative torque illustrated sketches RC Scale/Wischers Continued page 51 cutting punch filed piece steel dimensions equal desired lou ver Quality steel isnt critical punch after being filed shape will took exactly like individual louver Securely solder punch center metal plate roughly dimensioned 1/16 x 3-in dimension equals board width punch plate assembly epoxied boards cutting edge toward hinge about end 9 hinge After epoxy hardens drill pair holes through plate wood fit steel dowels closely dowels pressed flush plate surface An ideal dowel mate rial 3/32-in mustc wire hinged hoards brought together louver punch rests against lower board light hammer blow top board will leave imprint wood mark location cutting edge die steel 148 Model Aviation block about square 2 3-in long block set eroose cut across board block lush board surface Use file make cenain blocks cutting edge shatp square After cutting groove block carve out bit wood form relief punch two boards should now come together separated metal plate carved relief should quite close punch shape slightly larger compensate thickness metal material being punched steel block pressed groove Epoxy place necessary two hinged boards brought together punch should just clear die block gap between cutting edges too great aluminum sheet will tear rather cut Use paper shims beneath hinge leaves obtain clean cut homemade louver cutter has made hundreds louvers shows no sign wear arrangement described will make single louver row louvers material must removed lower board avoid flat tening previous form placing edge cutaway portion exact location relative die block louver spacing row auto matically maintained Set last formed louver against cutaway edge Use pencil lines etched side aluminum s guide straight rows first thought hammer blow necessary cut form louver 010 litho aluminum later found just squeezing hand pressure will cut through metal much less risk misalignment Louv ers punched rate 170 hour neat rows exactly spaced Dont get carried away did punch too sheet containing about 50 Forming corrugations Metal corrugated ailer ons used Waco Aeronca C-2 airplanes example can formed thin sheet alu mtnum using same primitive tooling foregoing text purpose 005-in sheet thickness preferred punch triangularshaped strip steel soldered across plate upper board pushes aluminum matching groove lower board lower board very hard made birch maple example groove can cut directly wood softer woods die steel will needed groove filed metal turn epoxied place using punch guide exact location important cutting groove retain sharp corners groove meets flat surface cor rugation requires three sharp corners realism punch height must match slightly continued page 152 RETRIEVER $300Qi plus shipping VLMT Ut IMILtU tMLt ULbIUN TL LMbT MbrMDLT SPECTACuLAR PLYING QUALITIES FULLY ACROBATIC 641N WINGSPAN 75 LBS USING 45 ENGINES AND up opS
Edition: Model Aviation - 1983/05
Page Numbers: 43, 44, 45, 48, 148
In foreground engine No 3 has disassembled show internal elements wnicn generate rotation i-or compiete unoerstanaing lOOK other illustrations read text Behind engine No 5 Authors early ducted-fan work provided impetus new engine shape WHAT DO YOU GET cross rotary engine regular engine get Cam-Axial engine What ask Basically engine piston rotates well reciprocates author has developed patented new mechanical cycle does re quire usual connecting rodcrankshaft/ piston relationship presently employed internal combustion engines cause shaft rotate having piston rotate need crank-type shaft connecting rod eliminated Before detailing accom plished brief explanation came about might order 1958 idea ducted-fan-type propulsion system stirred imagination small 24-inch-span Free Flight model powered Cox 02 engine four bladed fan inside duct made foam coffee cup designed built model flew well showing sufficient power good rate climb mood followed other duct designs power pods Working ducted fans brought about desire find engine would lend itself better ducted-fan shrouded-propeller design Without going lengthy description opinion available engines difficult mount presented too much disturbance airflow within duct Needed engine having streamlined shape center duct TQ knowledge have twoengines type May1983 43 Engine No 5 latest authors series machined castings Only engine piston motion line shaft known have marketed apparently little success marketed apparently much success other standard en gine gear box change direction uf output shaft What looking something simple straightforward gears few ideas came plastic model later produced brick-type engine some proportions seemed about right gave feeling wanted run next step convert findings refined model prove disprove notion engine configuration would really run / N 0 Co V Cj Shaft End \ 1 75 dia N ) Weight 9% oz __ V 495 0 ElK Look drawings imagine neat installations models can made Cam-Axial engine Castings used head cylinder shaft housing Its 24 cu After some drafting much time effort spent trying find shops make parts wound up having remake some Eventually went together result very gratifying engine did run members Roswell Air Force Club Im member attendance meeting demon strated will attest fact will other people have also witnessed its running since After successful operation first engine convinced least mechanical standpoint arrangement could have some merit though would re quire development time precautionary step 44 Model Aviation exploded view drawings used patent filingwhich resulted suance patent No 4366784 items aside carburetor prop nut washer glow plug machine screws standard model airplane engine use engine really works ii N author/inventor Paul nis arawing boardholding latest Cam-Axial engine first operational left Cutaway basic Cam-Axial engine com ponents can wonder present what its future will though author notes number possibilities text drawings show important difference between Cam-Axial engine others Cam-Axial above note constant moment arm force M applied two places around shaft center cranktype belowl changing moment arm 0 stroke/2 produces wasteful side forces \ Side Force - On Piston t 7 C M prevent possible infringement some ones patent safeguard idea 1 decided good time try see patent would possible found patent attorney subsequently US Patent No 4366784 issued patent application being formulated being processed went ahead new ideas improving en gine made pattern cylinder head shaft housing help friend two sets aluminum castings made work out improvements machining procedures first made another plastic model experience able machine parts myself / Ill - / 7 / 7/ /U 1 /7/ Fortunately able obtain used Atlas lathe go along small Sears lathe old drill press Probably difficult part making engines figure out just go about machining parts necessary pre-plan operation ad vance assure success couldnt afford spoil castings other parts because difficulty time involved get re placements Various small tools fixtures setups used also made good advantage engine works may help refer photos drawings engine cam-induced piston rotation directly drives output shaft Two piston power strokes produce complete 3600 rotation shaft other words revolution Continued page 48 L;~ upper drawing position piston shaft fuel induction lower drawing burnt fuel exhausted fresh fuel mixture bypassed combustion chamber May 1983 45 M -J N Shaft M Happily purring away authors first opera tional engine piston rotates recipro cates Its new principle Still Using bid Fashioned L4/ing Hinges s SS well gain control efficiency eliminating gap between moveable nd stationary control surfaces will amazed performance gained using simple inexpen sive improvement FREE MOVEMENT 450 STRONG AND LIGHTWEIGHT COMPLETELY FUELPROOF COMPATABLE WITH ALL IRON-ON MATER IALS COMES IN 3 FT LENGTHS SMALL 1808PRICE 3 ft $250 LARGE 14 Introducing $295 T0DIGGER PATENT PENDING Tempered Steel HInge Slotting Centering Tool dealer order direct ~add 300 shipping w ELDON J LIND COMPANY 2912 Walker Lee Los Alamitos CA 90720 U MO0l Aviation Simplifies Control Svr face Hfnging EASYTO INSTALL INSTALL IIWGE OSE IGHT PIN TO MAKE -SM4LL ROLE EVERY il/CR OR SO OR/P CYAAOACRYLATE GLLE IN HOLES CAPILLARY ACOON WILL CARRY GLUE A/ORG FRY/PR JO/NT -3 FOR ADDITIONAL SEOJRITi P/SE/PT SMALL PIN EVERY FEW INCHESCUT OFF FLUSII FILL AND SAND AS NEEDED FOR FIPISRING Send Free Info fine products FOURMOST PRODUCTS 4040 24th Avenue Forest Grove OR 97116 t CUT 1/4 DEEP SLIT ALOND TAR F/ILL LENGTH LR THE MATING NJRFACES Cam-Axial/Paul Continued paqe 45 shaft equivalent revolution two-cylinder conventional engine Axial mo tion piston transmitted output shaft permits simple effec tive fuel-air induction exhaust similar two-stroke engines used power mod els Basic components Cam-Axial en gine cylinder head shaft housing cam-track liner piston two cam fol lowers output shaft exhaust stacks car buretor ignition device necessary hardware course carburetor ig nition device available numerous sources unique Cam-Axial engine induction fuel-air mixture output shaft has axially bored hole cross hole registers passageway housing carburetor piston moving toward combustion chamber head end Bypass exhaust ports liner cylinder register other uncovered piston nears its position away com bustion chamber non-reciprocating output shaft model has square cross section piston square hole slides axially back forth As piston reciprocates cam track imparts rotational motion both piston output shaft Sequence operation follows As piston moves inside liner toward head partial vacuum chamber tween housing piston draws fuel-air mixture takes place shaft intake port registration induction passage leading car buretor Continued piston movement toward head compresses fuel mixture Proper ignition takes place optimum com pression piston position pushing pis ton away head pistons camfollowing rollers restricted liners cam track thus causing pistonand consequently output shaftto rotate As piston moves toward housing both exhaust bypass ports un covered top piston allows exhaust gas venting since shaft rota tion has taken induction ports out registration fuel-air mixture drawn now compressed pushed up cam track bypassed com bustion chamber burned gases ex hausted out takes place output shaft rotates l80 induction com pression power exhaust cycle Once through cycle have com plete 360 rotation shaft two power strokes per revolution shaft piston has two cam follower rollers spaced 1 800 apart attached near end opposite combustion end cam track sinusoidal configuration gives static rotationally balanced unit responsible achieving two power strokes revolution shaftContinued page 148 DMC LABS Helicopter Fuselage Kits True Scale Design Necessary Hardware Lightweight Epexyglass Highest Quality Bell 222 Hughes 500 D-60Fits Heliboy Competitor Kavan Kalt Hughes 500 D-40Fits Miniboy KaIt -20 Custom Fabrication & Tooling Available Manufacturers Dealer & Manufacturers Inquiries Welcome See Us MACS Show Under N ship Since June 1 1981 Ralph Roppo President DC - -cJ SW 41st St Renton WA 98055 2C4-251-9553 Bell 222 GAPLESS HiNGE SLOTTER Simplifies installation Gapless Hinges Makes 51515 4 Sizes Balsa E $250 GRAPHICS THE ROLLS ROYCE OF NUMBERS & LETTERS THEY STAY ON EVEN WHEN DRENCHEDU WITH FUEL MICRO-THIN CAST VINYL PEEL EM OFF & STICK EM ONI bylonRdsL 19044 USA THE new POWRTOW WINCH ZIP & LONGER BATTERY LIFE Power size sailplane current draw -kiting & manual drum brakes adjustable speed parachute turn-a round foot switch 115 lb braided line use iith RETRIEVER launch-a-minute flightsan end line shagging delays line crossings drag free operation tangles heavy-duty cables Clips braided 301blinetow ribbonhand switch line guides ball bearing swivels DAVEY SYSTEMS CORPORATION ONE ROOD LANEMALVEEN PA 19355 215644-0692 Write call information Cam-Axial/Paul Continued page 48 Although first engines have conceived model airplane propulsion units mind little imagination can lead visualize other uses Since dont see need new technologies material processes should production pos sibilities utilizing latest materials methods Using current state art equiv alent present-day engine manufacturing would expect some Cam-Axial engine possible advantages might include horsepower per unit weight horse power per displacement smoother oper ation multi-cylinder configurations possible conventional engines because reduction side forces piston caused crank angle connecting rod twice power pulses natural lubri cation cam track followers pis ton shaft less dead volume between piston housing giving better pumping action cam track configuration does have harmonic can programconfigured apply power shaft rotation relative rest cycle Another possibly advantageous difference relative torque illustrated sketches RC Scale/Wischers Continued page 51 cutting punch filed piece steel dimensions equal desired lou ver Quality steel isnt critical punch after being filed shape will took exactly like individual louver Securely solder punch center metal plate roughly dimensioned 1/16 x 3-in dimension equals board width punch plate assembly epoxied boards cutting edge toward hinge about end 9 hinge After epoxy hardens drill pair holes through plate wood fit steel dowels closely dowels pressed flush plate surface An ideal dowel mate rial 3/32-in mustc wire hinged hoards brought together louver punch rests against lower board light hammer blow top board will leave imprint wood mark location cutting edge die steel 148 Model Aviation block about square 2 3-in long block set eroose cut across board block lush board surface Use file make cenain blocks cutting edge shatp square After cutting groove block carve out bit wood form relief punch two boards should now come together separated metal plate carved relief should quite close punch shape slightly larger compensate thickness metal material being punched steel block pressed groove Epoxy place necessary two hinged boards brought together punch should just clear die block gap between cutting edges too great aluminum sheet will tear rather cut Use paper shims beneath hinge leaves obtain clean cut homemade louver cutter has made hundreds louvers shows no sign wear arrangement described will make single louver row louvers material must removed lower board avoid flat tening previous form placing edge cutaway portion exact location relative die block louver spacing row auto matically maintained Set last formed louver against cutaway edge Use pencil lines etched side aluminum s guide straight rows first thought hammer blow necessary cut form louver 010 litho aluminum later found just squeezing hand pressure will cut through metal much less risk misalignment Louv ers punched rate 170 hour neat rows exactly spaced Dont get carried away did punch too sheet containing about 50 Forming corrugations Metal corrugated ailer ons used Waco Aeronca C-2 airplanes example can formed thin sheet alu mtnum using same primitive tooling foregoing text purpose 005-in sheet thickness preferred punch triangularshaped strip steel soldered across plate upper board pushes aluminum matching groove lower board lower board very hard made birch maple example groove can cut directly wood softer woods die steel will needed groove filed metal turn epoxied place using punch guide exact location important cutting groove retain sharp corners groove meets flat surface cor rugation requires three sharp corners realism punch height must match slightly continued page 152 RETRIEVER $300Qi plus shipping VLMT Ut IMILtU tMLt ULbIUN TL LMbT MbrMDLT SPECTACuLAR PLYING QUALITIES FULLY ACROBATIC 641N WINGSPAN 75 LBS USING 45 ENGINES AND up opS
Edition: Model Aviation - 1983/05
Page Numbers: 43, 44, 45, 48, 148
In foreground engine No 3 has disassembled show internal elements wnicn generate rotation i-or compiete unoerstanaing lOOK other illustrations read text Behind engine No 5 Authors early ducted-fan work provided impetus new engine shape WHAT DO YOU GET cross rotary engine regular engine get Cam-Axial engine What ask Basically engine piston rotates well reciprocates author has developed patented new mechanical cycle does re quire usual connecting rodcrankshaft/ piston relationship presently employed internal combustion engines cause shaft rotate having piston rotate need crank-type shaft connecting rod eliminated Before detailing accom plished brief explanation came about might order 1958 idea ducted-fan-type propulsion system stirred imagination small 24-inch-span Free Flight model powered Cox 02 engine four bladed fan inside duct made foam coffee cup designed built model flew well showing sufficient power good rate climb mood followed other duct designs power pods Working ducted fans brought about desire find engine would lend itself better ducted-fan shrouded-propeller design Without going lengthy description opinion available engines difficult mount presented too much disturbance airflow within duct Needed engine having streamlined shape center duct TQ knowledge have twoengines type May1983 43 Engine No 5 latest authors series machined castings Only engine piston motion line shaft known have marketed apparently little success marketed apparently much success other standard en gine gear box change direction uf output shaft What looking something simple straightforward gears few ideas came plastic model later produced brick-type engine some proportions seemed about right gave feeling wanted run next step convert findings refined model prove disprove notion engine configuration would really run / N 0 Co V Cj Shaft End \ 1 75 dia N ) Weight 9% oz __ V 495 0 ElK Look drawings imagine neat installations models can made Cam-Axial engine Castings used head cylinder shaft housing Its 24 cu After some drafting much time effort spent trying find shops make parts wound up having remake some Eventually went together result very gratifying engine did run members Roswell Air Force Club Im member attendance meeting demon strated will attest fact will other people have also witnessed its running since After successful operation first engine convinced least mechanical standpoint arrangement could have some merit though would re quire development time precautionary step 44 Model Aviation exploded view drawings used patent filingwhich resulted suance patent No 4366784 items aside carburetor prop nut washer glow plug machine screws standard model airplane engine use engine really works ii N author/inventor Paul nis arawing boardholding latest Cam-Axial engine first operational left Cutaway basic Cam-Axial engine com ponents can wonder present what its future will though author notes number possibilities text drawings show important difference between Cam-Axial engine others Cam-Axial above note constant moment arm force M applied two places around shaft center cranktype belowl changing moment arm 0 stroke/2 produces wasteful side forces \ Side Force - On Piston t 7 C M prevent possible infringement some ones patent safeguard idea 1 decided good time try see patent would possible found patent attorney subsequently US Patent No 4366784 issued patent application being formulated being processed went ahead new ideas improving en gine made pattern cylinder head shaft housing help friend two sets aluminum castings made work out improvements machining procedures first made another plastic model experience able machine parts myself / Ill - / 7 / 7/ /U 1 /7/ Fortunately able obtain used Atlas lathe go along small Sears lathe old drill press Probably difficult part making engines figure out just go about machining parts necessary pre-plan operation ad vance assure success couldnt afford spoil castings other parts because difficulty time involved get re placements Various small tools fixtures setups used also made good advantage engine works may help refer photos drawings engine cam-induced piston rotation directly drives output shaft Two piston power strokes produce complete 3600 rotation shaft other words revolution Continued page 48 L;~ upper drawing position piston shaft fuel induction lower drawing burnt fuel exhausted fresh fuel mixture bypassed combustion chamber May 1983 45 M -J N Shaft M Happily purring away authors first opera tional engine piston rotates recipro cates Its new principle Still Using bid Fashioned L4/ing Hinges s SS well gain control efficiency eliminating gap between moveable nd stationary control surfaces will amazed performance gained using simple inexpen sive improvement FREE MOVEMENT 450 STRONG AND LIGHTWEIGHT COMPLETELY FUELPROOF COMPATABLE WITH ALL IRON-ON MATER IALS COMES IN 3 FT LENGTHS SMALL 1808PRICE 3 ft $250 LARGE 14 Introducing $295 T0DIGGER PATENT PENDING Tempered Steel HInge Slotting Centering Tool dealer order direct ~add 300 shipping w ELDON J LIND COMPANY 2912 Walker Lee Los Alamitos CA 90720 U MO0l Aviation Simplifies Control Svr face Hfnging EASYTO INSTALL INSTALL IIWGE OSE IGHT PIN TO MAKE -SM4LL ROLE EVERY il/CR OR SO OR/P CYAAOACRYLATE GLLE IN HOLES CAPILLARY ACOON WILL CARRY GLUE A/ORG FRY/PR JO/NT -3 FOR ADDITIONAL SEOJRITi P/SE/PT SMALL PIN EVERY FEW INCHESCUT OFF FLUSII FILL AND SAND AS NEEDED FOR FIPISRING Send Free Info fine products FOURMOST PRODUCTS 4040 24th Avenue Forest Grove OR 97116 t CUT 1/4 DEEP SLIT ALOND TAR F/ILL LENGTH LR THE MATING NJRFACES Cam-Axial/Paul Continued paqe 45 shaft equivalent revolution two-cylinder conventional engine Axial mo tion piston transmitted output shaft permits simple effec tive fuel-air induction exhaust similar two-stroke engines used power mod els Basic components Cam-Axial en gine cylinder head shaft housing cam-track liner piston two cam fol lowers output shaft exhaust stacks car buretor ignition device necessary hardware course carburetor ig nition device available numerous sources unique Cam-Axial engine induction fuel-air mixture output shaft has axially bored hole cross hole registers passageway housing carburetor piston moving toward combustion chamber head end Bypass exhaust ports liner cylinder register other uncovered piston nears its position away com bustion chamber non-reciprocating output shaft model has square cross section piston square hole slides axially back forth As piston reciprocates cam track imparts rotational motion both piston output shaft Sequence operation follows As piston moves inside liner toward head partial vacuum chamber tween housing piston draws fuel-air mixture takes place shaft intake port registration induction passage leading car buretor Continued piston movement toward head compresses fuel mixture Proper ignition takes place optimum com pression piston position pushing pis ton away head pistons camfollowing rollers restricted liners cam track thus causing pistonand consequently output shaftto rotate As piston moves toward housing both exhaust bypass ports un covered top piston allows exhaust gas venting since shaft rota tion has taken induction ports out registration fuel-air mixture drawn now compressed pushed up cam track bypassed com bustion chamber burned gases ex hausted out takes place output shaft rotates l80 induction com pression power exhaust cycle Once through cycle have com plete 360 rotation shaft two power strokes per revolution shaft piston has two cam follower rollers spaced 1 800 apart attached near end opposite combustion end cam track sinusoidal configuration gives static rotationally balanced unit responsible achieving two power strokes revolution shaftContinued page 148 DMC LABS Helicopter Fuselage Kits True Scale Design Necessary Hardware Lightweight Epexyglass Highest Quality Bell 222 Hughes 500 D-60Fits Heliboy Competitor Kavan Kalt Hughes 500 D-40Fits Miniboy KaIt -20 Custom Fabrication & Tooling Available Manufacturers Dealer & Manufacturers Inquiries Welcome See Us MACS Show Under N ship Since June 1 1981 Ralph Roppo President DC - -cJ SW 41st St Renton WA 98055 2C4-251-9553 Bell 222 GAPLESS HiNGE SLOTTER Simplifies installation Gapless Hinges Makes 51515 4 Sizes Balsa E $250 GRAPHICS THE ROLLS ROYCE OF NUMBERS & LETTERS THEY STAY ON EVEN WHEN DRENCHEDU WITH FUEL MICRO-THIN CAST VINYL PEEL EM OFF & STICK EM ONI bylonRdsL 19044 USA THE new POWRTOW WINCH ZIP & LONGER BATTERY LIFE Power size sailplane current draw -kiting & manual drum brakes adjustable speed parachute turn-a round foot switch 115 lb braided line use iith RETRIEVER launch-a-minute flightsan end line shagging delays line crossings drag free operation tangles heavy-duty cables Clips braided 301blinetow ribbonhand switch line guides ball bearing swivels DAVEY SYSTEMS CORPORATION ONE ROOD LANEMALVEEN PA 19355 215644-0692 Write call information Cam-Axial/Paul Continued page 48 Although first engines have conceived model airplane propulsion units mind little imagination can lead visualize other uses Since dont see need new technologies material processes should production pos sibilities utilizing latest materials methods Using current state art equiv alent present-day engine manufacturing would expect some Cam-Axial engine possible advantages might include horsepower per unit weight horse power per displacement smoother oper ation multi-cylinder configurations possible conventional engines because reduction side forces piston caused crank angle connecting rod twice power pulses natural lubri cation cam track followers pis ton shaft less dead volume between piston housing giving better pumping action cam track configuration does have harmonic can programconfigured apply power shaft rotation relative rest cycle Another possibly advantageous difference relative torque illustrated sketches RC Scale/Wischers Continued page 51 cutting punch filed piece steel dimensions equal desired lou ver Quality steel isnt critical punch after being filed shape will took exactly like individual louver Securely solder punch center metal plate roughly dimensioned 1/16 x 3-in dimension equals board width punch plate assembly epoxied boards cutting edge toward hinge about end 9 hinge After epoxy hardens drill pair holes through plate wood fit steel dowels closely dowels pressed flush plate surface An ideal dowel mate rial 3/32-in mustc wire hinged hoards brought together louver punch rests against lower board light hammer blow top board will leave imprint wood mark location cutting edge die steel 148 Model Aviation block about square 2 3-in long block set eroose cut across board block lush board surface Use file make cenain blocks cutting edge shatp square After cutting groove block carve out bit wood form relief punch two boards should now come together separated metal plate carved relief should quite close punch shape slightly larger compensate thickness metal material being punched steel block pressed groove Epoxy place necessary two hinged boards brought together punch should just clear die block gap between cutting edges too great aluminum sheet will tear rather cut Use paper shims beneath hinge leaves obtain clean cut homemade louver cutter has made hundreds louvers shows no sign wear arrangement described will make single louver row louvers material must removed lower board avoid flat tening previous form placing edge cutaway portion exact location relative die block louver spacing row auto matically maintained Set last formed louver against cutaway edge Use pencil lines etched side aluminum s guide straight rows first thought hammer blow necessary cut form louver 010 litho aluminum later found just squeezing hand pressure will cut through metal much less risk misalignment Louv ers punched rate 170 hour neat rows exactly spaced Dont get carried away did punch too sheet containing about 50 Forming corrugations Metal corrugated ailer ons used Waco Aeronca C-2 airplanes example can formed thin sheet alu mtnum using same primitive tooling foregoing text purpose 005-in sheet thickness preferred punch triangularshaped strip steel soldered across plate upper board pushes aluminum matching groove lower board lower board very hard made birch maple example groove can cut directly wood softer woods die steel will needed groove filed metal turn epoxied place using punch guide exact location important cutting groove retain sharp corners groove meets flat surface cor rugation requires three sharp corners realism punch height must match slightly continued page 152 RETRIEVER $300Qi plus shipping VLMT Ut IMILtU tMLt ULbIUN TL LMbT MbrMDLT SPECTACuLAR PLYING QUALITIES FULLY ACROBATIC 641N WINGSPAN 75 LBS USING 45 ENGINES AND up opS
Edition: Model Aviation - 1983/05
Page Numbers: 43, 44, 45, 48, 148
In foreground engine No 3 has disassembled show internal elements wnicn generate rotation i-or compiete unoerstanaing lOOK other illustrations read text Behind engine No 5 Authors early ducted-fan work provided impetus new engine shape WHAT DO YOU GET cross rotary engine regular engine get Cam-Axial engine What ask Basically engine piston rotates well reciprocates author has developed patented new mechanical cycle does re quire usual connecting rodcrankshaft/ piston relationship presently employed internal combustion engines cause shaft rotate having piston rotate need crank-type shaft connecting rod eliminated Before detailing accom plished brief explanation came about might order 1958 idea ducted-fan-type propulsion system stirred imagination small 24-inch-span Free Flight model powered Cox 02 engine four bladed fan inside duct made foam coffee cup designed built model flew well showing sufficient power good rate climb mood followed other duct designs power pods Working ducted fans brought about desire find engine would lend itself better ducted-fan shrouded-propeller design Without going lengthy description opinion available engines difficult mount presented too much disturbance airflow within duct Needed engine having streamlined shape center duct TQ knowledge have twoengines type May1983 43 Engine No 5 latest authors series machined castings Only engine piston motion line shaft known have marketed apparently little success marketed apparently much success other standard en gine gear box change direction uf output shaft What looking something simple straightforward gears few ideas came plastic model later produced brick-type engine some proportions seemed about right gave feeling wanted run next step convert findings refined model prove disprove notion engine configuration would really run / N 0 Co V Cj Shaft End \ 1 75 dia N ) Weight 9% oz __ V 495 0 ElK Look drawings imagine neat installations models can made Cam-Axial engine Castings used head cylinder shaft housing Its 24 cu After some drafting much time effort spent trying find shops make parts wound up having remake some Eventually went together result very gratifying engine did run members Roswell Air Force Club Im member attendance meeting demon strated will attest fact will other people have also witnessed its running since After successful operation first engine convinced least mechanical standpoint arrangement could have some merit though would re quire development time precautionary step 44 Model Aviation exploded view drawings used patent filingwhich resulted suance patent No 4366784 items aside carburetor prop nut washer glow plug machine screws standard model airplane engine use engine really works ii N author/inventor Paul nis arawing boardholding latest Cam-Axial engine first operational left Cutaway basic Cam-Axial engine com ponents can wonder present what its future will though author notes number possibilities text drawings show important difference between Cam-Axial engine others Cam-Axial above note constant moment arm force M applied two places around shaft center cranktype belowl changing moment arm 0 stroke/2 produces wasteful side forces \ Side Force - On Piston t 7 C M prevent possible infringement some ones patent safeguard idea 1 decided good time try see patent would possible found patent attorney subsequently US Patent No 4366784 issued patent application being formulated being processed went ahead new ideas improving en gine made pattern cylinder head shaft housing help friend two sets aluminum castings made work out improvements machining procedures first made another plastic model experience able machine parts myself / Ill - / 7 / 7/ /U 1 /7/ Fortunately able obtain used Atlas lathe go along small Sears lathe old drill press Probably difficult part making engines figure out just go about machining parts necessary pre-plan operation ad vance assure success couldnt afford spoil castings other parts because difficulty time involved get re placements Various small tools fixtures setups used also made good advantage engine works may help refer photos drawings engine cam-induced piston rotation directly drives output shaft Two piston power strokes produce complete 3600 rotation shaft other words revolution Continued page 48 L;~ upper drawing position piston shaft fuel induction lower drawing burnt fuel exhausted fresh fuel mixture bypassed combustion chamber May 1983 45 M -J N Shaft M Happily purring away authors first opera tional engine piston rotates recipro cates Its new principle Still Using bid Fashioned L4/ing Hinges s SS well gain control efficiency eliminating gap between moveable nd stationary control surfaces will amazed performance gained using simple inexpen sive improvement FREE MOVEMENT 450 STRONG AND LIGHTWEIGHT COMPLETELY FUELPROOF COMPATABLE WITH ALL IRON-ON MATER IALS COMES IN 3 FT LENGTHS SMALL 1808PRICE 3 ft $250 LARGE 14 Introducing $295 T0DIGGER PATENT PENDING Tempered Steel HInge Slotting Centering Tool dealer order direct ~add 300 shipping w ELDON J LIND COMPANY 2912 Walker Lee Los Alamitos CA 90720 U MO0l Aviation Simplifies Control Svr face Hfnging EASYTO INSTALL INSTALL IIWGE OSE IGHT PIN TO MAKE -SM4LL ROLE EVERY il/CR OR SO OR/P CYAAOACRYLATE GLLE IN HOLES CAPILLARY ACOON WILL CARRY GLUE A/ORG FRY/PR JO/NT -3 FOR ADDITIONAL SEOJRITi P/SE/PT SMALL PIN EVERY FEW INCHESCUT OFF FLUSII FILL AND SAND AS NEEDED FOR FIPISRING Send Free Info fine products FOURMOST PRODUCTS 4040 24th Avenue Forest Grove OR 97116 t CUT 1/4 DEEP SLIT ALOND TAR F/ILL LENGTH LR THE MATING NJRFACES Cam-Axial/Paul Continued paqe 45 shaft equivalent revolution two-cylinder conventional engine Axial mo tion piston transmitted output shaft permits simple effec tive fuel-air induction exhaust similar two-stroke engines used power mod els Basic components Cam-Axial en gine cylinder head shaft housing cam-track liner piston two cam fol lowers output shaft exhaust stacks car buretor ignition device necessary hardware course carburetor ig nition device available numerous sources unique Cam-Axial engine induction fuel-air mixture output shaft has axially bored hole cross hole registers passageway housing carburetor piston moving toward combustion chamber head end Bypass exhaust ports liner cylinder register other uncovered piston nears its position away com bustion chamber non-reciprocating output shaft model has square cross section piston square hole slides axially back forth As piston reciprocates cam track imparts rotational motion both piston output shaft Sequence operation follows As piston moves inside liner toward head partial vacuum chamber tween housing piston draws fuel-air mixture takes place shaft intake port registration induction passage leading car buretor Continued piston movement toward head compresses fuel mixture Proper ignition takes place optimum com pression piston position pushing pis ton away head pistons camfollowing rollers restricted liners cam track thus causing pistonand consequently output shaftto rotate As piston moves toward housing both exhaust bypass ports un covered top piston allows exhaust gas venting since shaft rota tion has taken induction ports out registration fuel-air mixture drawn now compressed pushed up cam track bypassed com bustion chamber burned gases ex hausted out takes place output shaft rotates l80 induction com pression power exhaust cycle Once through cycle have com plete 360 rotation shaft two power strokes per revolution shaft piston has two cam follower rollers spaced 1 800 apart attached near end opposite combustion end cam track sinusoidal configuration gives static rotationally balanced unit responsible achieving two power strokes revolution shaftContinued page 148 DMC LABS Helicopter Fuselage Kits True Scale Design Necessary Hardware Lightweight Epexyglass Highest Quality Bell 222 Hughes 500 D-60Fits Heliboy Competitor Kavan Kalt Hughes 500 D-40Fits Miniboy KaIt -20 Custom Fabrication & Tooling Available Manufacturers Dealer & Manufacturers Inquiries Welcome See Us MACS Show Under N ship Since June 1 1981 Ralph Roppo President DC - -cJ SW 41st St Renton WA 98055 2C4-251-9553 Bell 222 GAPLESS HiNGE SLOTTER Simplifies installation Gapless Hinges Makes 51515 4 Sizes Balsa E $250 GRAPHICS THE ROLLS ROYCE OF NUMBERS & LETTERS THEY STAY ON EVEN WHEN DRENCHEDU WITH FUEL MICRO-THIN CAST VINYL PEEL EM OFF & STICK EM ONI bylonRdsL 19044 USA THE new POWRTOW WINCH ZIP & LONGER BATTERY LIFE Power size sailplane current draw -kiting & manual drum brakes adjustable speed parachute turn-a round foot switch 115 lb braided line use iith RETRIEVER launch-a-minute flightsan end line shagging delays line crossings drag free operation tangles heavy-duty cables Clips braided 301blinetow ribbonhand switch line guides ball bearing swivels DAVEY SYSTEMS CORPORATION ONE ROOD LANEMALVEEN PA 19355 215644-0692 Write call information Cam-Axial/Paul Continued page 48 Although first engines have conceived model airplane propulsion units mind little imagination can lead visualize other uses Since dont see need new technologies material processes should production pos sibilities utilizing latest materials methods Using current state art equiv alent present-day engine manufacturing would expect some Cam-Axial engine possible advantages might include horsepower per unit weight horse power per displacement smoother oper ation multi-cylinder configurations possible conventional engines because reduction side forces piston caused crank angle connecting rod twice power pulses natural lubri cation cam track followers pis ton shaft less dead volume between piston housing giving better pumping action cam track configuration does have harmonic can programconfigured apply power shaft rotation relative rest cycle Another possibly advantageous difference relative torque illustrated sketches RC Scale/Wischers Continued page 51 cutting punch filed piece steel dimensions equal desired lou ver Quality steel isnt critical punch after being filed shape will took exactly like individual louver Securely solder punch center metal plate roughly dimensioned 1/16 x 3-in dimension equals board width punch plate assembly epoxied boards cutting edge toward hinge about end 9 hinge After epoxy hardens drill pair holes through plate wood fit steel dowels closely dowels pressed flush plate surface An ideal dowel mate rial 3/32-in mustc wire hinged hoards brought together louver punch rests against lower board light hammer blow top board will leave imprint wood mark location cutting edge die steel 148 Model Aviation block about square 2 3-in long block set eroose cut across board block lush board surface Use file make cenain blocks cutting edge shatp square After cutting groove block carve out bit wood form relief punch two boards should now come together separated metal plate carved relief should quite close punch shape slightly larger compensate thickness metal material being punched steel block pressed groove Epoxy place necessary two hinged boards brought together punch should just clear die block gap between cutting edges too great aluminum sheet will tear rather cut Use paper shims beneath hinge leaves obtain clean cut homemade louver cutter has made hundreds louvers shows no sign wear arrangement described will make single louver row louvers material must removed lower board avoid flat tening previous form placing edge cutaway portion exact location relative die block louver spacing row auto matically maintained Set last formed louver against cutaway edge Use pencil lines etched side aluminum s guide straight rows first thought hammer blow necessary cut form louver 010 litho aluminum later found just squeezing hand pressure will cut through metal much less risk misalignment Louv ers punched rate 170 hour neat rows exactly spaced Dont get carried away did punch too sheet containing about 50 Forming corrugations Metal corrugated ailer ons used Waco Aeronca C-2 airplanes example can formed thin sheet alu mtnum using same primitive tooling foregoing text purpose 005-in sheet thickness preferred punch triangularshaped strip steel soldered across plate upper board pushes aluminum matching groove lower board lower board very hard made birch maple example groove can cut directly wood softer woods die steel will needed groove filed metal turn epoxied place using punch guide exact location important cutting groove retain sharp corners groove meets flat surface cor rugation requires three sharp corners realism punch height must match slightly continued page 152 RETRIEVER $300Qi plus shipping VLMT Ut IMILtU tMLt ULbIUN TL LMbT MbrMDLT SPECTACuLAR PLYING QUALITIES FULLY ACROBATIC 641N WINGSPAN 75 LBS USING 45 ENGINES AND up opS
Edition: Model Aviation - 1983/05
Page Numbers: 43, 44, 45, 48, 148
In foreground engine No 3 has disassembled show internal elements wnicn generate rotation i-or compiete unoerstanaing lOOK other illustrations read text Behind engine No 5 Authors early ducted-fan work provided impetus new engine shape WHAT DO YOU GET cross rotary engine regular engine get Cam-Axial engine What ask Basically engine piston rotates well reciprocates author has developed patented new mechanical cycle does re quire usual connecting rodcrankshaft/ piston relationship presently employed internal combustion engines cause shaft rotate having piston rotate need crank-type shaft connecting rod eliminated Before detailing accom plished brief explanation came about might order 1958 idea ducted-fan-type propulsion system stirred imagination small 24-inch-span Free Flight model powered Cox 02 engine four bladed fan inside duct made foam coffee cup designed built model flew well showing sufficient power good rate climb mood followed other duct designs power pods Working ducted fans brought about desire find engine would lend itself better ducted-fan shrouded-propeller design Without going lengthy description opinion available engines difficult mount presented too much disturbance airflow within duct Needed engine having streamlined shape center duct TQ knowledge have twoengines type May1983 43 Engine No 5 latest authors series machined castings Only engine piston motion line shaft known have marketed apparently little success marketed apparently much success other standard en gine gear box change direction uf output shaft What looking something simple straightforward gears few ideas came plastic model later produced brick-type engine some proportions seemed about right gave feeling wanted run next step convert findings refined model prove disprove notion engine configuration would really run / N 0 Co V Cj Shaft End \ 1 75 dia N ) Weight 9% oz __ V 495 0 ElK Look drawings imagine neat installations models can made Cam-Axial engine Castings used head cylinder shaft housing Its 24 cu After some drafting much time effort spent trying find shops make parts wound up having remake some Eventually went together result very gratifying engine did run members Roswell Air Force Club Im member attendance meeting demon strated will attest fact will other people have also witnessed its running since After successful operation first engine convinced least mechanical standpoint arrangement could have some merit though would re quire development time precautionary step 44 Model Aviation exploded view drawings used patent filingwhich resulted suance patent No 4366784 items aside carburetor prop nut washer glow plug machine screws standard model airplane engine use engine really works ii N author/inventor Paul nis arawing boardholding latest Cam-Axial engine first operational left Cutaway basic Cam-Axial engine com ponents can wonder present what its future will though author notes number possibilities text drawings show important difference between Cam-Axial engine others Cam-Axial above note constant moment arm force M applied two places around shaft center cranktype belowl changing moment arm 0 stroke/2 produces wasteful side forces \ Side Force - On Piston t 7 C M prevent possible infringement some ones patent safeguard idea 1 decided good time try see patent would possible found patent attorney subsequently US Patent No 4366784 issued patent application being formulated being processed went ahead new ideas improving en gine made pattern cylinder head shaft housing help friend two sets aluminum castings made work out improvements machining procedures first made another plastic model experience able machine parts myself / Ill - / 7 / 7/ /U 1 /7/ Fortunately able obtain used Atlas lathe go along small Sears lathe old drill press Probably difficult part making engines figure out just go about machining parts necessary pre-plan operation ad vance assure success couldnt afford spoil castings other parts because difficulty time involved get re placements Various small tools fixtures setups used also made good advantage engine works may help refer photos drawings engine cam-induced piston rotation directly drives output shaft Two piston power strokes produce complete 3600 rotation shaft other words revolution Continued page 48 L;~ upper drawing position piston shaft fuel induction lower drawing burnt fuel exhausted fresh fuel mixture bypassed combustion chamber May 1983 45 M -J N Shaft M Happily purring away authors first opera tional engine piston rotates recipro cates Its new principle Still Using bid Fashioned L4/ing Hinges s SS well gain control efficiency eliminating gap between moveable nd stationary control surfaces will amazed performance gained using simple inexpen sive improvement FREE MOVEMENT 450 STRONG AND LIGHTWEIGHT COMPLETELY FUELPROOF COMPATABLE WITH ALL IRON-ON MATER IALS COMES IN 3 FT LENGTHS SMALL 1808PRICE 3 ft $250 LARGE 14 Introducing $295 T0DIGGER PATENT PENDING Tempered Steel HInge Slotting Centering Tool dealer order direct ~add 300 shipping w ELDON J LIND COMPANY 2912 Walker Lee Los Alamitos CA 90720 U MO0l Aviation Simplifies Control Svr face Hfnging EASYTO INSTALL INSTALL IIWGE OSE IGHT PIN TO MAKE -SM4LL ROLE EVERY il/CR OR SO OR/P CYAAOACRYLATE GLLE IN HOLES CAPILLARY ACOON WILL CARRY GLUE A/ORG FRY/PR JO/NT -3 FOR ADDITIONAL SEOJRITi P/SE/PT SMALL PIN EVERY FEW INCHESCUT OFF FLUSII FILL AND SAND AS NEEDED FOR FIPISRING Send Free Info fine products FOURMOST PRODUCTS 4040 24th Avenue Forest Grove OR 97116 t CUT 1/4 DEEP SLIT ALOND TAR F/ILL LENGTH LR THE MATING NJRFACES Cam-Axial/Paul Continued paqe 45 shaft equivalent revolution two-cylinder conventional engine Axial mo tion piston transmitted output shaft permits simple effec tive fuel-air induction exhaust similar two-stroke engines used power mod els Basic components Cam-Axial en gine cylinder head shaft housing cam-track liner piston two cam fol lowers output shaft exhaust stacks car buretor ignition device necessary hardware course carburetor ig nition device available numerous sources unique Cam-Axial engine induction fuel-air mixture output shaft has axially bored hole cross hole registers passageway housing carburetor piston moving toward combustion chamber head end Bypass exhaust ports liner cylinder register other uncovered piston nears its position away com bustion chamber non-reciprocating output shaft model has square cross section piston square hole slides axially back forth As piston reciprocates cam track imparts rotational motion both piston output shaft Sequence operation follows As piston moves inside liner toward head partial vacuum chamber tween housing piston draws fuel-air mixture takes place shaft intake port registration induction passage leading car buretor Continued piston movement toward head compresses fuel mixture Proper ignition takes place optimum com pression piston position pushing pis ton away head pistons camfollowing rollers restricted liners cam track thus causing pistonand consequently output shaftto rotate As piston moves toward housing both exhaust bypass ports un covered top piston allows exhaust gas venting since shaft rota tion has taken induction ports out registration fuel-air mixture drawn now compressed pushed up cam track bypassed com bustion chamber burned gases ex hausted out takes place output shaft rotates l80 induction com pression power exhaust cycle Once through cycle have com plete 360 rotation shaft two power strokes per revolution shaft piston has two cam follower rollers spaced 1 800 apart attached near end opposite combustion end cam track sinusoidal configuration gives static rotationally balanced unit responsible achieving two power strokes revolution shaftContinued page 148 DMC LABS Helicopter Fuselage Kits True Scale Design Necessary Hardware Lightweight Epexyglass Highest Quality Bell 222 Hughes 500 D-60Fits Heliboy Competitor Kavan Kalt Hughes 500 D-40Fits Miniboy KaIt -20 Custom Fabrication & Tooling Available Manufacturers Dealer & Manufacturers Inquiries Welcome See Us MACS Show Under N ship Since June 1 1981 Ralph Roppo President DC - -cJ SW 41st St Renton WA 98055 2C4-251-9553 Bell 222 GAPLESS HiNGE SLOTTER Simplifies installation Gapless Hinges Makes 51515 4 Sizes Balsa E $250 GRAPHICS THE ROLLS ROYCE OF NUMBERS & LETTERS THEY STAY ON EVEN WHEN DRENCHEDU WITH FUEL MICRO-THIN CAST VINYL PEEL EM OFF & STICK EM ONI bylonRdsL 19044 USA THE new POWRTOW WINCH ZIP & LONGER BATTERY LIFE Power size sailplane current draw -kiting & manual drum brakes adjustable speed parachute turn-a round foot switch 115 lb braided line use iith RETRIEVER launch-a-minute flightsan end line shagging delays line crossings drag free operation tangles heavy-duty cables Clips braided 301blinetow ribbonhand switch line guides ball bearing swivels DAVEY SYSTEMS CORPORATION ONE ROOD LANEMALVEEN PA 19355 215644-0692 Write call information Cam-Axial/Paul Continued page 48 Although first engines have conceived model airplane propulsion units mind little imagination can lead visualize other uses Since dont see need new technologies material processes should production pos sibilities utilizing latest materials methods Using current state art equiv alent present-day engine manufacturing would expect some Cam-Axial engine possible advantages might include horsepower per unit weight horse power per displacement smoother oper ation multi-cylinder configurations possible conventional engines because reduction side forces piston caused crank angle connecting rod twice power pulses natural lubri cation cam track followers pis ton shaft less dead volume between piston housing giving better pumping action cam track configuration does have harmonic can programconfigured apply power shaft rotation relative rest cycle Another possibly advantageous difference relative torque illustrated sketches RC Scale/Wischers Continued page 51 cutting punch filed piece steel dimensions equal desired lou ver Quality steel isnt critical punch after being filed shape will took exactly like individual louver Securely solder punch center metal plate roughly dimensioned 1/16 x 3-in dimension equals board width punch plate assembly epoxied boards cutting edge toward hinge about end 9 hinge After epoxy hardens drill pair holes through plate wood fit steel dowels closely dowels pressed flush plate surface An ideal dowel mate rial 3/32-in mustc wire hinged hoards brought together louver punch rests against lower board light hammer blow top board will leave imprint wood mark location cutting edge die steel 148 Model Aviation block about square 2 3-in long block set eroose cut across board block lush board surface Use file make cenain blocks cutting edge shatp square After cutting groove block carve out bit wood form relief punch two boards should now come together separated metal plate carved relief should quite close punch shape slightly larger compensate thickness metal material being punched steel block pressed groove Epoxy place necessary two hinged boards brought together punch should just clear die block gap between cutting edges too great aluminum sheet will tear rather cut Use paper shims beneath hinge leaves obtain clean cut homemade louver cutter has made hundreds louvers shows no sign wear arrangement described will make single louver row louvers material must removed lower board avoid flat tening previous form placing edge cutaway portion exact location relative die block louver spacing row auto matically maintained Set last formed louver against cutaway edge Use pencil lines etched side aluminum s guide straight rows first thought hammer blow necessary cut form louver 010 litho aluminum later found just squeezing hand pressure will cut through metal much less risk misalignment Louv ers punched rate 170 hour neat rows exactly spaced Dont get carried away did punch too sheet containing about 50 Forming corrugations Metal corrugated ailer ons used Waco Aeronca C-2 airplanes example can formed thin sheet alu mtnum using same primitive tooling foregoing text purpose 005-in sheet thickness preferred punch triangularshaped strip steel soldered across plate upper board pushes aluminum matching groove lower board lower board very hard made birch maple example groove can cut directly wood softer woods die steel will needed groove filed metal turn epoxied place using punch guide exact location important cutting groove retain sharp corners groove meets flat surface cor rugation requires three sharp corners realism punch height must match slightly continued page 152 RETRIEVER $300Qi plus shipping VLMT Ut IMILtU tMLt ULbIUN TL LMbT MbrMDLT SPECTACuLAR PLYING QUALITIES FULLY ACROBATIC 641N WINGSPAN 75 LBS USING 45 ENGINES AND up opS