George RE Afyers WHAT IS MOM MOM Master Onboard Multi-mix device intended placed between receiver array servos Its function mix control signals MOM permits define servo travel end-points span neutral position travel direction reversing linearity linear exponential over range curvatures independently transmitter also permits mix signals mixture can defined terms master/slave direction degree ie percentage mixed signal shows up slave channel else can buy six mixers $125 MOM invented England devel oped United States patented both countries governing concept MOM things belong transmitter levers fly airplane rudder elevator ailerons throttle flaps gear etc have first version MOM six-mixer device out production new eight-mixer version will soon available WHY MIX CONTROLS Mixing extends control over air plane Helicopter fliers first adopt mixers Now wont leave home Sailplane fliers say mixers es sentiai winning Crow sailplanes common tail-rotor mixing helicopters No doubt about mixers additional complication setting up airplane its first flight once have mastered make flying much simpler dependable keep talking about control mixing what kind control mixing am talking about V-tail rudder elevator functions mixed kind crow ailerons another Crow landing configuration both ailerons move up spoilers continuing function ailerons same time flaps move down drag elevator neutral position moves compensate pitch change WACO 10-550 see February 93 issue has four servos per aileron per V-tail section requires both crow V-tail mixing Flying wings need elevons ailerons function both ailerons elevators F- 14 Tomcat E-2C Hawkeye use flapper ons like crow ailerons move down Long-winged airplanes benefit coupled rudder ailerons Fun-fly planes want opposed flap elevator extreme maneu verability crow precision landings Automatic pitch trim flaps well automatic pitch yaw trim throttle useful scale models Grumman F5F-l Skyrocket 1940 twin motor throttles linked rudder pedals steering want add gyro thats another reason mixing January 1980 issue Model Aviation contains article towing sailplanes via RC model glider tug article used both flapperons automatic pitch trim flaps dual mixer design built Ace Silver Seven transmitter described October 1980 issue SETTING UP THE MIXERS fairly dull personone finds easy follow written instructions preciselycan set up MOM correctly first time rest us will have about five times 1 The first setup will done learn procedures 2 The second setup will done experi ment adjustments Thats learn start trans mitter controls set maximum can adjust servo throw toward less throw will also learn disturb controls arent self-centering throttle gear flaps etc until need adjust Some adjustments have subtle characteristics 3 The third setup done experiment Right Yellow Aircraft superscale fans drooling over new P-38 Lightning F-117A Nighthawk models photo taken WRAM show July1993 75 RU F1yig Tdy 70 Froehiich Farm Road Hicks viii NY 11801 Above TwinTwin Faye Stilley Wilton Connecticut modified Dualist Powered two Saito four-cycle 60s model has 66-inch span weighs 9 pounds 8 ounces prizewinner WRAM show control mixing last might repeat activity few times because bought MOM get mixing control 4 The fourth setup might produce flyable airplane 5 The fifth setup might produce better configuration found make test instru ment mounting servo protractor attaching pointer servo shaft gave way measure record adjustments Programming MOM like working new piece software computer must learn follow specific procedures giving commands must learn read MOMs flash beep codes can give lot information understand confuse you dont What happens next depends personality type wants get out everything will develop alternate control setups fill remaining memories total three MOM filled have two choices Either buy another can save hundreds steps work already done will decide now know over whenever necessary will erase something Thats bit like saying dont need copy last years income tax because figured out Most folks use MOM probably will dedicate just airplane used extra memories will probably will used set up alternate configu rations same airplane brings up shortcoming MOM cant change configuration flight can super transmitters MOMs major annoyance cant save setup anywhere outside MOM Dave Abbe investigating use pocket calculator create save setups downloading MOM expects have MOM Mk 2 whatever called want WHAT DOES MOM DO MOM like piano doesnt thing until learn play 1 It allows set servo reversing neutral position end control throw independently plus exponential curve shaping selfcentering proportional controls make adjustments using control sticks transmitter no need have dedicated switches transmitter use once life plane same statement applies following features 2 It allows set servo reversing end control throw indepen dently proportional noncentering controls eg throttle 3 It allows set servo reversing switched controls 4 It allows mix control set mixed controls other control control mixture six ways eight Mk 2 version configuration 5 It saves three configurations 6 MOM also contains relay can operate camera ignite glow plug start electric motor turn landing lights ignite smoke bomb deploy parachute whatever else can switch 7 It remembers above no battery connected 8 It warns battery low 9 It lets listen interference channel via built-in speaker counts number interference hits flight up 10 10 It tells you forget turn off receiver 11 It beeps lost airplane finder make off-field landings 12 It can go fail-safe mode LSC control signal lost dont think people will set up fail-safe LSC loss-of-signal compensator though could have saved WACO its last crash plane close ground thinking about landing someone switched transmitter channel time yell Channel 14 Im hit other guy didnt shut off time LSC enabled plane might have continued its path out control long enough him come senses shut off transmitter What have essential dilemma RC aviation better fly over empty spaces crash immediately better have airplane continue out control until interference situation cleared People argue several ways Selfishly wants plane continue undamaged until control reestablished though flight path may threaten other peoples lives property Prudently immediate crash vacant land upon loss control better delayed crash people property Ration ally controlled crash usually does less damage uncontrolled crash Logically cant guarantee robot call Fail safe will produce controlled crash Surrendering control anything anyone goes against essence reason RC flying fly RC because want control really prefer immediate crash something tries take control away us Thats doubt people will program LSC Dave Abbe says dont program LSC control responses usually get mushy presence interference say depends interference Dave considering doing away LSC tightening transmitter characterization MOM does calibration procedure MOM offers lot control little money some time invested learning use Add MOM simple system no dual rates reversing switches mixers get features super system much less cost t MOM occupies space eight-channel receiver shown equipment bay Steve Anthony Force 5 sailplane 76 Model Aviation e Batteries go under wing can change packs shifting center gravity Launch weight four pounds Astro FAI 15G 10 cells
Edition: Model Aviation - 1993/07
Page Numbers: 75, 76
George RE Afyers WHAT IS MOM MOM Master Onboard Multi-mix device intended placed between receiver array servos Its function mix control signals MOM permits define servo travel end-points span neutral position travel direction reversing linearity linear exponential over range curvatures independently transmitter also permits mix signals mixture can defined terms master/slave direction degree ie percentage mixed signal shows up slave channel else can buy six mixers $125 MOM invented England devel oped United States patented both countries governing concept MOM things belong transmitter levers fly airplane rudder elevator ailerons throttle flaps gear etc have first version MOM six-mixer device out production new eight-mixer version will soon available WHY MIX CONTROLS Mixing extends control over air plane Helicopter fliers first adopt mixers Now wont leave home Sailplane fliers say mixers es sentiai winning Crow sailplanes common tail-rotor mixing helicopters No doubt about mixers additional complication setting up airplane its first flight once have mastered make flying much simpler dependable keep talking about control mixing what kind control mixing am talking about V-tail rudder elevator functions mixed kind crow ailerons another Crow landing configuration both ailerons move up spoilers continuing function ailerons same time flaps move down drag elevator neutral position moves compensate pitch change WACO 10-550 see February 93 issue has four servos per aileron per V-tail section requires both crow V-tail mixing Flying wings need elevons ailerons function both ailerons elevators F- 14 Tomcat E-2C Hawkeye use flapper ons like crow ailerons move down Long-winged airplanes benefit coupled rudder ailerons Fun-fly planes want opposed flap elevator extreme maneu verability crow precision landings Automatic pitch trim flaps well automatic pitch yaw trim throttle useful scale models Grumman F5F-l Skyrocket 1940 twin motor throttles linked rudder pedals steering want add gyro thats another reason mixing January 1980 issue Model Aviation contains article towing sailplanes via RC model glider tug article used both flapperons automatic pitch trim flaps dual mixer design built Ace Silver Seven transmitter described October 1980 issue SETTING UP THE MIXERS fairly dull personone finds easy follow written instructions preciselycan set up MOM correctly first time rest us will have about five times 1 The first setup will done learn procedures 2 The second setup will done experi ment adjustments Thats learn start trans mitter controls set maximum can adjust servo throw toward less throw will also learn disturb controls arent self-centering throttle gear flaps etc until need adjust Some adjustments have subtle characteristics 3 The third setup done experiment Right Yellow Aircraft superscale fans drooling over new P-38 Lightning F-117A Nighthawk models photo taken WRAM show July1993 75 RU F1yig Tdy 70 Froehiich Farm Road Hicks viii NY 11801 Above TwinTwin Faye Stilley Wilton Connecticut modified Dualist Powered two Saito four-cycle 60s model has 66-inch span weighs 9 pounds 8 ounces prizewinner WRAM show control mixing last might repeat activity few times because bought MOM get mixing control 4 The fourth setup might produce flyable airplane 5 The fifth setup might produce better configuration found make test instru ment mounting servo protractor attaching pointer servo shaft gave way measure record adjustments Programming MOM like working new piece software computer must learn follow specific procedures giving commands must learn read MOMs flash beep codes can give lot information understand confuse you dont What happens next depends personality type wants get out everything will develop alternate control setups fill remaining memories total three MOM filled have two choices Either buy another can save hundreds steps work already done will decide now know over whenever necessary will erase something Thats bit like saying dont need copy last years income tax because figured out Most folks use MOM probably will dedicate just airplane used extra memories will probably will used set up alternate configu rations same airplane brings up shortcoming MOM cant change configuration flight can super transmitters MOMs major annoyance cant save setup anywhere outside MOM Dave Abbe investigating use pocket calculator create save setups downloading MOM expects have MOM Mk 2 whatever called want WHAT DOES MOM DO MOM like piano doesnt thing until learn play 1 It allows set servo reversing neutral position end control throw independently plus exponential curve shaping selfcentering proportional controls make adjustments using control sticks transmitter no need have dedicated switches transmitter use once life plane same statement applies following features 2 It allows set servo reversing end control throw indepen dently proportional noncentering controls eg throttle 3 It allows set servo reversing switched controls 4 It allows mix control set mixed controls other control control mixture six ways eight Mk 2 version configuration 5 It saves three configurations 6 MOM also contains relay can operate camera ignite glow plug start electric motor turn landing lights ignite smoke bomb deploy parachute whatever else can switch 7 It remembers above no battery connected 8 It warns battery low 9 It lets listen interference channel via built-in speaker counts number interference hits flight up 10 10 It tells you forget turn off receiver 11 It beeps lost airplane finder make off-field landings 12 It can go fail-safe mode LSC control signal lost dont think people will set up fail-safe LSC loss-of-signal compensator though could have saved WACO its last crash plane close ground thinking about landing someone switched transmitter channel time yell Channel 14 Im hit other guy didnt shut off time LSC enabled plane might have continued its path out control long enough him come senses shut off transmitter What have essential dilemma RC aviation better fly over empty spaces crash immediately better have airplane continue out control until interference situation cleared People argue several ways Selfishly wants plane continue undamaged until control reestablished though flight path may threaten other peoples lives property Prudently immediate crash vacant land upon loss control better delayed crash people property Ration ally controlled crash usually does less damage uncontrolled crash Logically cant guarantee robot call Fail safe will produce controlled crash Surrendering control anything anyone goes against essence reason RC flying fly RC because want control really prefer immediate crash something tries take control away us Thats doubt people will program LSC Dave Abbe says dont program LSC control responses usually get mushy presence interference say depends interference Dave considering doing away LSC tightening transmitter characterization MOM does calibration procedure MOM offers lot control little money some time invested learning use Add MOM simple system no dual rates reversing switches mixers get features super system much less cost t MOM occupies space eight-channel receiver shown equipment bay Steve Anthony Force 5 sailplane 76 Model Aviation e Batteries go under wing can change packs shifting center gravity Launch weight four pounds Astro FAI 15G 10 cells