A SOLUTION Pylon Racing radiofrequency problem has put forth fellow Racer Russ Kime letter goes say probably aware frequencycontrol system devised get rid 31M third order intermodulation interferenceEd explained enclosed sheets Weve used California four races now out problems NMPRA National Miniature Pylon Racing Association has adopted nationally have further refined CDs will now have least three alternate matrix configura dons case fliers given contest over loaded frequency another will also hold true 1988 beyond Remember letter written 1987Bill also recommendation ignore oddnumbered frequencies will come use 1991 since will already have 15 usable channels 72 MHz plus 50-54 MHz ones thats long way future heart system get rid close-interval 3IM combinations drop ping third channel get rid long-interval 31M combinations pairing least two frequencies offending 31M triplet matrix will dropping channels 42 48 54 1987 season eliminate channels 12 18 24 30 36 42 48 54 1988 beyond reason writing you would care mention banned frequencies column might save Racing brethren ex pense having change frequencies should inadvertently buy new equipment banned channels Thanks much cooperation keep up good work column NMPRA Frequency Control System Russ mentioned letter contained couple additional sheets section dealing 1987 system Ive left out inasmuch column will appear 1988 section would past history NMPRA FREQUENCY-CONTROL SYSTEM system has designed eliminate third-order intermodulation 31M problems technical explanation 31M occurs too long examine detail suffice say have three frequencies equal spacing 31M can occur Channels 38 40 42 form such triplet close-interval triplet 40-42-44 42-44-46 get rid close-interval triplets simple exped ient removing third frequency thus 38 4044 4650 52 $ 56 Now close-interval 31M combinations gone still have wide-interval 31M triplets 384450 404652 445056 again see equal spacing between 38 44 44 50 could solve problem again removing third fre quency 44 50 46 52 example would have lost five original 10 fre quencies better solution retains remaining channels solve matrix columns placing two frequencies given triplet same column matrix doesnt matter two frequencies triplet use just long least two can use three too go same column matrix gives person making up matrix pairings lot flexibility case frequency overloads too fliers two channels occur too often As matter fact least three alternate matrix configurations possible have void some frequencies work both four-column three-column matrices Phase II system use 1988 beyond 1988 will add new narrow-band channels 14 through 34 drop old 72 MHz channels apply same principle eliminating third channel get rid close-interval 31M combinations life gets difficult since now have long-interval 31M combinations such 16-34-52 example Nonetheless have able come up least three possible matrix configurations eliminate 31M combinations ease burden Con test Directors have make such pairings eliminate channels 12 18 24 30 36 42 48 54 old 72 MHz ones retain channels 14 16 20 22 26 28 32 34 38 40 44 46 50 52 56 50-54 MHz fre quencies total 15 plus 50-54 MHz ones three matrix configurations men tioned previously first presented four columns will also shown three columns Matrix 1 Col 1 Col 2 Col 3 Col 4 Continued page 152 February 1988 57 Radio Conoi Pylon Racing Bill Hager 706 Glen Haven Dr Coarce TX 77302 1987 NMPRA 0500 Championship Race held sunny California win ners folks back row flew California Class RL Mark Lattlmore 1st Ron Mills 2nd DarwIn Barrle 3rd Bob Nickle 4th Jim Allen 5th AMA Class winners front row RL Kent McKenna 1st Lee Von Der Hey 2nd Spencer Wallace 3rd Larry Cranton 5th DarwIn Barns 3rd California Class took 4th event good race industry aonatea lOIS 01 cnoice gooaies prizes ioe rirn uouu namps RC Helicopters/Jolly Continued page 56 Stork power 60 has offer Stork has no bad habits Mine hovered per fectly first lift-off good flier will really enjoy hovering shenanigans possible model Ive never flown machine like Stork doesnt seem care its flying sideways backwards pirouetting forward flight Because rotor head type Dual Damp ening Flapping DDF cannot make model respond jerky abrupt manner means maneuvers will smooth Loops will large rolls will little slow side really like feel Stork stability tail rotor power unsurpassed noticed Stork really smokes throw power pitch Robert Gorham told Stork clocked 70 mph friend radar gun seems about right know really gets program standard point tirade Check prototype Giant Scale model may constructing its imperfections duplicate inac curacies perfect model consider build real thing imperfect can relax extreme standards tad enjoy sanding Check few real airplanes youll real ize Im right Pin striping may straight equally thick its entire length edges painted-on license numbers will show evi dence paint leaking under edge sten cil Windshields antique birds will show cracks theyve drilled bolts nvets Removable cowling panels War Birds will show outward bends corners Dzus fasteners may different colors missing entirely Plexiglas canopies often show craz ing particularly aircraft old same true antiques used clear Pyraiin windshields skylights windows ad ditional problem yellowing plastic list endless important point Strive perfection building Scale model dont too annoyed fall short After builders real thing havent achieved either As say Jolly Olde England TTFN Ta Ta Now responding advertisers mention read about ModelAviation Looking back written put 15 20 flights Stork have no problems Originally concerned large amount plastic use self-tapping screws fasteners key locations designers must have known what doing nothing has fallen off would like thank folks GMP al lowing report Stork supply ing kit tested article Ive since found Out Im enjoys Stork note Dave Youngblood states Cur tis World Champion Youngblood now away college studying engineering According Dave Stork machine Curtis has him Austin Texas Novice time Since running story Curtis Sparnicht have literally deluged let ters beginners Most have interest ing problems Next month Im going discuss gyros install nov ice please tune next monthand Robert Ted Tim Mike Curtis out let know right X-Cell update As mentioned before Im build ing X-Cell 60 right now kit excellent unusually-complete instructions Walt Schoonard staying top project let ting know new information ideas come field hope report new aerobatic rocket ship month after next BCNU RC Pylon Racing/Hager Continued page 57 141626 202232 384050 444656 28 34 52 Matrix 2 142016 263228 443840 565052 22 34 46 Matrix 3 * 14162022 Continued page 155 152 Model Aviation RC Giant Scale/de Vries Continued page 146 Heres column form matrixes look threeMatrix 1 141626 202232 384050 444656 2834 52 Matrix 2 142016 263228 443840 565052 3422 46 Matrix 3 * 1416 2628 3840 5052 2234 46 20 32 44 56 matrix configurations drop 50-54 MHz frequencies two avail able columns * Configuration 3 courtesy Owen S Black Carmichael CA anyone else can figure out further alternate configurations going nuts please let Russ Kime know Race report Lockport NY weather cool sunny hu midity low Some people felt cool races engines thought weather greatest UPRC United Pylon Racing Circuit Ed Formula record heat time fell no less six times old record belonged Neil Watson 1193 bettered time three heats best 1136 rk Sciandra bettered old rec ord twice best time 1186 Mack heat Neil Watson able hang onto Neils tail let go racking up 1141 p old UPRC top hat top guns UPRC predicted someoneactually someone UPRC would break 115 barrier yearand has done day also little unique almost no mishaps Sport event al though five crashes Formula race results Sport Pylon Expert Class 1 Dick Cowan 1387 2 Rick Paine 1419 3 Ken Gehres 1541 4 Dave Gierke 1444 5 Al Mack 1455 Sport Pylon Standard Class 1 Marlene Niko dem 2077 2 Gary Gau 2125 3 Clarence Ragland 2395 4 Kevin Cuomo 2328 Formula combined results FAI 1 Mark Acrobatic Sport Scale TUCANO iso Custom Built model best its category 40/45 engine 55 Wingspan Compare featcres other ARF models High gloss polyuretnane paint Fiberglass fuselage Birch conered foam wings accessories instalied including special servo engi ne mounts Extremely short time son air ask free catoog otner models avaiable price list AIR CHAMP MODELS2854 NW75 th Ave Miami F 33122- Phone 305 594-5616 Sciandra 1186 2 Rick Paine 1293 3 Neil Watson 1136 4 Al Mack 1141 5 Ed Smith 1391 See races CL Aerobatics/Fancher Continued page 62 two fundamental types fuel deliv ery systems widespread use Stunt ships suc tion systems uniflow systems Which delivery system have depends end vent tube inside tank located better other simply different may appropriate use other See sketches labeled Al through A4 Al A3 illustrate suction principle using sealed bottle vent tube just enters container ends above fluid level fluid outlet tube located bottom container Al fluid level higha full tank situationand pressure outlet tube high result head pressure proportional distance between fluid level outlet tube container nearly empty A3 head pressure low consequently pressure outlet tube low Figures A2 A4 merely illustrate principle perspec tive Stunt tank circular flight ie looking down top tank fuel feed pipe bottom fuel vent just enter ing tank top engine feeding type sys TIRED OF SINGLE CYLINDER VIBRATING ENGINES HERE IS THE ANSWER Vibration worst enemies R/C modeling larger engine vibration will generated Opposing twin cylinders firing simultaneously reduces vibration halt course twins cost manufacture EHS Trading Ltd has brought Ihe AFFORDABLE TWIN Irom Peoples Republic China SMOOTH reliable engine can yours fraction cost single cylinder also looks fits better airplane cheekcowls radial cowls Just think very very few tull scale airplanes using cylinder engine ORDER YOUR TWIN STAR TODAY Yout Airframe valuable Radio will thank tomorrow fly ORDER YOUR TWIN STAR NOW CALL TOLL FREE mare injorniai Ion contact1-800-63HOBBV EHS TRADING LTD808 935-9009 400 HUALANI ST BLDG 13EHAWAII STD TIME HILO HAWAII 9672010 AM-7PM Mom-S 2OO wITHOuT MUFFLER February 1988 155 26283234 38404446 505256 --- TWIN STAR 40 CC/24 CU IN
Edition: Model Aviation - 1988/02
Page Numbers: 57, 152, 155
A SOLUTION Pylon Racing radiofrequency problem has put forth fellow Racer Russ Kime letter goes say probably aware frequencycontrol system devised get rid 31M third order intermodulation interferenceEd explained enclosed sheets Weve used California four races now out problems NMPRA National Miniature Pylon Racing Association has adopted nationally have further refined CDs will now have least three alternate matrix configura dons case fliers given contest over loaded frequency another will also hold true 1988 beyond Remember letter written 1987Bill also recommendation ignore oddnumbered frequencies will come use 1991 since will already have 15 usable channels 72 MHz plus 50-54 MHz ones thats long way future heart system get rid close-interval 3IM combinations drop ping third channel get rid long-interval 31M combinations pairing least two frequencies offending 31M triplet matrix will dropping channels 42 48 54 1987 season eliminate channels 12 18 24 30 36 42 48 54 1988 beyond reason writing you would care mention banned frequencies column might save Racing brethren ex pense having change frequencies should inadvertently buy new equipment banned channels Thanks much cooperation keep up good work column NMPRA Frequency Control System Russ mentioned letter contained couple additional sheets section dealing 1987 system Ive left out inasmuch column will appear 1988 section would past history NMPRA FREQUENCY-CONTROL SYSTEM system has designed eliminate third-order intermodulation 31M problems technical explanation 31M occurs too long examine detail suffice say have three frequencies equal spacing 31M can occur Channels 38 40 42 form such triplet close-interval triplet 40-42-44 42-44-46 get rid close-interval triplets simple exped ient removing third frequency thus 38 4044 4650 52 $ 56 Now close-interval 31M combinations gone still have wide-interval 31M triplets 384450 404652 445056 again see equal spacing between 38 44 44 50 could solve problem again removing third fre quency 44 50 46 52 example would have lost five original 10 fre quencies better solution retains remaining channels solve matrix columns placing two frequencies given triplet same column matrix doesnt matter two frequencies triplet use just long least two can use three too go same column matrix gives person making up matrix pairings lot flexibility case frequency overloads too fliers two channels occur too often As matter fact least three alternate matrix configurations possible have void some frequencies work both four-column three-column matrices Phase II system use 1988 beyond 1988 will add new narrow-band channels 14 through 34 drop old 72 MHz channels apply same principle eliminating third channel get rid close-interval 31M combinations life gets difficult since now have long-interval 31M combinations such 16-34-52 example Nonetheless have able come up least three possible matrix configurations eliminate 31M combinations ease burden Con test Directors have make such pairings eliminate channels 12 18 24 30 36 42 48 54 old 72 MHz ones retain channels 14 16 20 22 26 28 32 34 38 40 44 46 50 52 56 50-54 MHz fre quencies total 15 plus 50-54 MHz ones three matrix configurations men tioned previously first presented four columns will also shown three columns Matrix 1 Col 1 Col 2 Col 3 Col 4 Continued page 152 February 1988 57 Radio Conoi Pylon Racing Bill Hager 706 Glen Haven Dr Coarce TX 77302 1987 NMPRA 0500 Championship Race held sunny California win ners folks back row flew California Class RL Mark Lattlmore 1st Ron Mills 2nd DarwIn Barrle 3rd Bob Nickle 4th Jim Allen 5th AMA Class winners front row RL Kent McKenna 1st Lee Von Der Hey 2nd Spencer Wallace 3rd Larry Cranton 5th DarwIn Barns 3rd California Class took 4th event good race industry aonatea lOIS 01 cnoice gooaies prizes ioe rirn uouu namps RC Helicopters/Jolly Continued page 56 Stork power 60 has offer Stork has no bad habits Mine hovered per fectly first lift-off good flier will really enjoy hovering shenanigans possible model Ive never flown machine like Stork doesnt seem care its flying sideways backwards pirouetting forward flight Because rotor head type Dual Damp ening Flapping DDF cannot make model respond jerky abrupt manner means maneuvers will smooth Loops will large rolls will little slow side really like feel Stork stability tail rotor power unsurpassed noticed Stork really smokes throw power pitch Robert Gorham told Stork clocked 70 mph friend radar gun seems about right know really gets program standard point tirade Check prototype Giant Scale model may constructing its imperfections duplicate inac curacies perfect model consider build real thing imperfect can relax extreme standards tad enjoy sanding Check few real airplanes youll real ize Im right Pin striping may straight equally thick its entire length edges painted-on license numbers will show evi dence paint leaking under edge sten cil Windshields antique birds will show cracks theyve drilled bolts nvets Removable cowling panels War Birds will show outward bends corners Dzus fasteners may different colors missing entirely Plexiglas canopies often show craz ing particularly aircraft old same true antiques used clear Pyraiin windshields skylights windows ad ditional problem yellowing plastic list endless important point Strive perfection building Scale model dont too annoyed fall short After builders real thing havent achieved either As say Jolly Olde England TTFN Ta Ta Now responding advertisers mention read about ModelAviation Looking back written put 15 20 flights Stork have no problems Originally concerned large amount plastic use self-tapping screws fasteners key locations designers must have known what doing nothing has fallen off would like thank folks GMP al lowing report Stork supply ing kit tested article Ive since found Out Im enjoys Stork note Dave Youngblood states Cur tis World Champion Youngblood now away college studying engineering According Dave Stork machine Curtis has him Austin Texas Novice time Since running story Curtis Sparnicht have literally deluged let ters beginners Most have interest ing problems Next month Im going discuss gyros install nov ice please tune next monthand Robert Ted Tim Mike Curtis out let know right X-Cell update As mentioned before Im build ing X-Cell 60 right now kit excellent unusually-complete instructions Walt Schoonard staying top project let ting know new information ideas come field hope report new aerobatic rocket ship month after next BCNU RC Pylon Racing/Hager Continued page 57 141626 202232 384050 444656 28 34 52 Matrix 2 142016 263228 443840 565052 22 34 46 Matrix 3 * 14162022 Continued page 155 152 Model Aviation RC Giant Scale/de Vries Continued page 146 Heres column form matrixes look threeMatrix 1 141626 202232 384050 444656 2834 52 Matrix 2 142016 263228 443840 565052 3422 46 Matrix 3 * 1416 2628 3840 5052 2234 46 20 32 44 56 matrix configurations drop 50-54 MHz frequencies two avail able columns * Configuration 3 courtesy Owen S Black Carmichael CA anyone else can figure out further alternate configurations going nuts please let Russ Kime know Race report Lockport NY weather cool sunny hu midity low Some people felt cool races engines thought weather greatest UPRC United Pylon Racing Circuit Ed Formula record heat time fell no less six times old record belonged Neil Watson 1193 bettered time three heats best 1136 rk Sciandra bettered old rec ord twice best time 1186 Mack heat Neil Watson able hang onto Neils tail let go racking up 1141 p old UPRC top hat top guns UPRC predicted someoneactually someone UPRC would break 115 barrier yearand has done day also little unique almost no mishaps Sport event al though five crashes Formula race results Sport Pylon Expert Class 1 Dick Cowan 1387 2 Rick Paine 1419 3 Ken Gehres 1541 4 Dave Gierke 1444 5 Al Mack 1455 Sport Pylon Standard Class 1 Marlene Niko dem 2077 2 Gary Gau 2125 3 Clarence Ragland 2395 4 Kevin Cuomo 2328 Formula combined results FAI 1 Mark Acrobatic Sport Scale TUCANO iso Custom Built model best its category 40/45 engine 55 Wingspan Compare featcres other ARF models High gloss polyuretnane paint Fiberglass fuselage Birch conered foam wings accessories instalied including special servo engi ne mounts Extremely short time son air ask free catoog otner models avaiable price list AIR CHAMP MODELS2854 NW75 th Ave Miami F 33122- Phone 305 594-5616 Sciandra 1186 2 Rick Paine 1293 3 Neil Watson 1136 4 Al Mack 1141 5 Ed Smith 1391 See races CL Aerobatics/Fancher Continued page 62 two fundamental types fuel deliv ery systems widespread use Stunt ships suc tion systems uniflow systems Which delivery system have depends end vent tube inside tank located better other simply different may appropriate use other See sketches labeled Al through A4 Al A3 illustrate suction principle using sealed bottle vent tube just enters container ends above fluid level fluid outlet tube located bottom container Al fluid level higha full tank situationand pressure outlet tube high result head pressure proportional distance between fluid level outlet tube container nearly empty A3 head pressure low consequently pressure outlet tube low Figures A2 A4 merely illustrate principle perspec tive Stunt tank circular flight ie looking down top tank fuel feed pipe bottom fuel vent just enter ing tank top engine feeding type sys TIRED OF SINGLE CYLINDER VIBRATING ENGINES HERE IS THE ANSWER Vibration worst enemies R/C modeling larger engine vibration will generated Opposing twin cylinders firing simultaneously reduces vibration halt course twins cost manufacture EHS Trading Ltd has brought Ihe AFFORDABLE TWIN Irom Peoples Republic China SMOOTH reliable engine can yours fraction cost single cylinder also looks fits better airplane cheekcowls radial cowls Just think very very few tull scale airplanes using cylinder engine ORDER YOUR TWIN STAR TODAY Yout Airframe valuable Radio will thank tomorrow fly ORDER YOUR TWIN STAR NOW CALL TOLL FREE mare injorniai Ion contact1-800-63HOBBV EHS TRADING LTD808 935-9009 400 HUALANI ST BLDG 13EHAWAII STD TIME HILO HAWAII 9672010 AM-7PM Mom-S 2OO wITHOuT MUFFLER February 1988 155 26283234 38404446 505256 --- TWIN STAR 40 CC/24 CU IN
Edition: Model Aviation - 1988/02
Page Numbers: 57, 152, 155
A SOLUTION Pylon Racing radiofrequency problem has put forth fellow Racer Russ Kime letter goes say probably aware frequencycontrol system devised get rid 31M third order intermodulation interferenceEd explained enclosed sheets Weve used California four races now out problems NMPRA National Miniature Pylon Racing Association has adopted nationally have further refined CDs will now have least three alternate matrix configura dons case fliers given contest over loaded frequency another will also hold true 1988 beyond Remember letter written 1987Bill also recommendation ignore oddnumbered frequencies will come use 1991 since will already have 15 usable channels 72 MHz plus 50-54 MHz ones thats long way future heart system get rid close-interval 3IM combinations drop ping third channel get rid long-interval 31M combinations pairing least two frequencies offending 31M triplet matrix will dropping channels 42 48 54 1987 season eliminate channels 12 18 24 30 36 42 48 54 1988 beyond reason writing you would care mention banned frequencies column might save Racing brethren ex pense having change frequencies should inadvertently buy new equipment banned channels Thanks much cooperation keep up good work column NMPRA Frequency Control System Russ mentioned letter contained couple additional sheets section dealing 1987 system Ive left out inasmuch column will appear 1988 section would past history NMPRA FREQUENCY-CONTROL SYSTEM system has designed eliminate third-order intermodulation 31M problems technical explanation 31M occurs too long examine detail suffice say have three frequencies equal spacing 31M can occur Channels 38 40 42 form such triplet close-interval triplet 40-42-44 42-44-46 get rid close-interval triplets simple exped ient removing third frequency thus 38 4044 4650 52 $ 56 Now close-interval 31M combinations gone still have wide-interval 31M triplets 384450 404652 445056 again see equal spacing between 38 44 44 50 could solve problem again removing third fre quency 44 50 46 52 example would have lost five original 10 fre quencies better solution retains remaining channels solve matrix columns placing two frequencies given triplet same column matrix doesnt matter two frequencies triplet use just long least two can use three too go same column matrix gives person making up matrix pairings lot flexibility case frequency overloads too fliers two channels occur too often As matter fact least three alternate matrix configurations possible have void some frequencies work both four-column three-column matrices Phase II system use 1988 beyond 1988 will add new narrow-band channels 14 through 34 drop old 72 MHz channels apply same principle eliminating third channel get rid close-interval 31M combinations life gets difficult since now have long-interval 31M combinations such 16-34-52 example Nonetheless have able come up least three possible matrix configurations eliminate 31M combinations ease burden Con test Directors have make such pairings eliminate channels 12 18 24 30 36 42 48 54 old 72 MHz ones retain channels 14 16 20 22 26 28 32 34 38 40 44 46 50 52 56 50-54 MHz fre quencies total 15 plus 50-54 MHz ones three matrix configurations men tioned previously first presented four columns will also shown three columns Matrix 1 Col 1 Col 2 Col 3 Col 4 Continued page 152 February 1988 57 Radio Conoi Pylon Racing Bill Hager 706 Glen Haven Dr Coarce TX 77302 1987 NMPRA 0500 Championship Race held sunny California win ners folks back row flew California Class RL Mark Lattlmore 1st Ron Mills 2nd DarwIn Barrle 3rd Bob Nickle 4th Jim Allen 5th AMA Class winners front row RL Kent McKenna 1st Lee Von Der Hey 2nd Spencer Wallace 3rd Larry Cranton 5th DarwIn Barns 3rd California Class took 4th event good race industry aonatea lOIS 01 cnoice gooaies prizes ioe rirn uouu namps RC Helicopters/Jolly Continued page 56 Stork power 60 has offer Stork has no bad habits Mine hovered per fectly first lift-off good flier will really enjoy hovering shenanigans possible model Ive never flown machine like Stork doesnt seem care its flying sideways backwards pirouetting forward flight Because rotor head type Dual Damp ening Flapping DDF cannot make model respond jerky abrupt manner means maneuvers will smooth Loops will large rolls will little slow side really like feel Stork stability tail rotor power unsurpassed noticed Stork really smokes throw power pitch Robert Gorham told Stork clocked 70 mph friend radar gun seems about right know really gets program standard point tirade Check prototype Giant Scale model may constructing its imperfections duplicate inac curacies perfect model consider build real thing imperfect can relax extreme standards tad enjoy sanding Check few real airplanes youll real ize Im right Pin striping may straight equally thick its entire length edges painted-on license numbers will show evi dence paint leaking under edge sten cil Windshields antique birds will show cracks theyve drilled bolts nvets Removable cowling panels War Birds will show outward bends corners Dzus fasteners may different colors missing entirely Plexiglas canopies often show craz ing particularly aircraft old same true antiques used clear Pyraiin windshields skylights windows ad ditional problem yellowing plastic list endless important point Strive perfection building Scale model dont too annoyed fall short After builders real thing havent achieved either As say Jolly Olde England TTFN Ta Ta Now responding advertisers mention read about ModelAviation Looking back written put 15 20 flights Stork have no problems Originally concerned large amount plastic use self-tapping screws fasteners key locations designers must have known what doing nothing has fallen off would like thank folks GMP al lowing report Stork supply ing kit tested article Ive since found Out Im enjoys Stork note Dave Youngblood states Cur tis World Champion Youngblood now away college studying engineering According Dave Stork machine Curtis has him Austin Texas Novice time Since running story Curtis Sparnicht have literally deluged let ters beginners Most have interest ing problems Next month Im going discuss gyros install nov ice please tune next monthand Robert Ted Tim Mike Curtis out let know right X-Cell update As mentioned before Im build ing X-Cell 60 right now kit excellent unusually-complete instructions Walt Schoonard staying top project let ting know new information ideas come field hope report new aerobatic rocket ship month after next BCNU RC Pylon Racing/Hager Continued page 57 141626 202232 384050 444656 28 34 52 Matrix 2 142016 263228 443840 565052 22 34 46 Matrix 3 * 14162022 Continued page 155 152 Model Aviation RC Giant Scale/de Vries Continued page 146 Heres column form matrixes look threeMatrix 1 141626 202232 384050 444656 2834 52 Matrix 2 142016 263228 443840 565052 3422 46 Matrix 3 * 1416 2628 3840 5052 2234 46 20 32 44 56 matrix configurations drop 50-54 MHz frequencies two avail able columns * Configuration 3 courtesy Owen S Black Carmichael CA anyone else can figure out further alternate configurations going nuts please let Russ Kime know Race report Lockport NY weather cool sunny hu midity low Some people felt cool races engines thought weather greatest UPRC United Pylon Racing Circuit Ed Formula record heat time fell no less six times old record belonged Neil Watson 1193 bettered time three heats best 1136 rk Sciandra bettered old rec ord twice best time 1186 Mack heat Neil Watson able hang onto Neils tail let go racking up 1141 p old UPRC top hat top guns UPRC predicted someoneactually someone UPRC would break 115 barrier yearand has done day also little unique almost no mishaps Sport event al though five crashes Formula race results Sport Pylon Expert Class 1 Dick Cowan 1387 2 Rick Paine 1419 3 Ken Gehres 1541 4 Dave Gierke 1444 5 Al Mack 1455 Sport Pylon Standard Class 1 Marlene Niko dem 2077 2 Gary Gau 2125 3 Clarence Ragland 2395 4 Kevin Cuomo 2328 Formula combined results FAI 1 Mark Acrobatic Sport Scale TUCANO iso Custom Built model best its category 40/45 engine 55 Wingspan Compare featcres other ARF models High gloss polyuretnane paint Fiberglass fuselage Birch conered foam wings accessories instalied including special servo engi ne mounts Extremely short time son air ask free catoog otner models avaiable price list AIR CHAMP MODELS2854 NW75 th Ave Miami F 33122- Phone 305 594-5616 Sciandra 1186 2 Rick Paine 1293 3 Neil Watson 1136 4 Al Mack 1141 5 Ed Smith 1391 See races CL Aerobatics/Fancher Continued page 62 two fundamental types fuel deliv ery systems widespread use Stunt ships suc tion systems uniflow systems Which delivery system have depends end vent tube inside tank located better other simply different may appropriate use other See sketches labeled Al through A4 Al A3 illustrate suction principle using sealed bottle vent tube just enters container ends above fluid level fluid outlet tube located bottom container Al fluid level higha full tank situationand pressure outlet tube high result head pressure proportional distance between fluid level outlet tube container nearly empty A3 head pressure low consequently pressure outlet tube low Figures A2 A4 merely illustrate principle perspec tive Stunt tank circular flight ie looking down top tank fuel feed pipe bottom fuel vent just enter ing tank top engine feeding type sys TIRED OF SINGLE CYLINDER VIBRATING ENGINES HERE IS THE ANSWER Vibration worst enemies R/C modeling larger engine vibration will generated Opposing twin cylinders firing simultaneously reduces vibration halt course twins cost manufacture EHS Trading Ltd has brought Ihe AFFORDABLE TWIN Irom Peoples Republic China SMOOTH reliable engine can yours fraction cost single cylinder also looks fits better airplane cheekcowls radial cowls Just think very very few tull scale airplanes using cylinder engine ORDER YOUR TWIN STAR TODAY Yout Airframe valuable Radio will thank tomorrow fly ORDER YOUR TWIN STAR NOW CALL TOLL FREE mare injorniai Ion contact1-800-63HOBBV EHS TRADING LTD808 935-9009 400 HUALANI ST BLDG 13EHAWAII STD TIME HILO HAWAII 9672010 AM-7PM Mom-S 2OO wITHOuT MUFFLER February 1988 155 26283234 38404446 505256 --- TWIN STAR 40 CC/24 CU IN