ccpm vs. eccpm
07-12-2009 | 12:08 PM
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RE: ccpm vs. eccpm
ORIGINAL: TCipolla
Whats the difference between ccpm and eccpm?
Whats the difference between ccpm and eccpm?
If you want to get technical, one is mechanical (all the mixing done on the helicopter via levers and bellcranks). The other (eCCPM) the mixing is done electronically on the radio.
The main difference is that the mCCPM has a bunch of bellcranks and mixers to achieve it's goal. On the eCCPM heli, you will have the servos connected directly to the swashplate.
It is hard to explain these days because most, if not all of the newer helis are either eCCPM or mCCPM. Years ago there were helis that were not CCPM. The Concept line of helis built by Kysho, comes to mind. Find one of those and you will immediately notice the difference. Otherwise I would not worry. Nowadays I worry about eCCPM and mostly make the assuption that the rest are mCCPM.
Rafael
07-12-2009 | 02:17 PM
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From: Belleville, IL
RE: ccpm vs. eccpm
so mccpm is the same as ccpm? I'm guessing my raptor 60 is just ccpm, because the type of swash on the Futaba 7chp is H-1; it has an independent servo for each function. Does this sound right?
07-12-2009 | 03:55 PM
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From: Spuzum,
BC, CANADA
RE: ccpm vs. eccpm
Like many accronyms, over time they can become so miss used that they can get confusing.
CCPM actually stands for Cyclic Collective Pitch Mixing.
It is required on ALL CP type of helis with a sliding swashplate. It was initially used to define helis that used a sliding swashplate mix and transfer the collective servo and cyclic servo commands to the blade grip control system that is above the swashplate (most helis in use today use this system) to others that used a fixed (non-sliding) swashplate for cyclic commands to the blade grips while using a seperate system (e.g. sliding washout hub or flybar carrier) to transfer the collective commands. Hence, no Collective or Cyclic mixing anywhere. (By the way, these are the only type that where entirely free of interaction). These type were seen in the past on the German Schluter (now Robbe) machines, on the Kalt and some TSK machines and the Concept series from Kyosho.
So the CCPM (sliding swashplate) systems, as Rafael points out, were either mixed by a mechanical system (properly refered to as mCCPM) below the swashplate in the heli or by the electronics in the radio (eCCPM).
For all intents and purposes, though there were a number of Europen manufacurers that used eCCPM systems back in the earlier days, most helis we saw here in N/A where mechanical mixed sliding swashplate units from Japan or the USA. When the term CCPM really became confusing, was when JR introduced their Ergo series of helicopters. These where the first "volume" sellers in N/A that used the 120 degree electronic mixing system. Unfortunately their advertising spin doctors only referred to it as a their new CCPM system. So many here. for years (and some even today), thought/think CCPM means an electronic mixing system.
That is why many of us long time heli flyers prefer to use the proper terms for the sliding swashplate system - as an eCCPM or. like your Raptor. an mCCPM system.
To conclude, if your heli uses the swashplate to slide up and down the mainshaft to give collective inputs to the head, and tilts for/aft & left/right to give cyclic commands to the head, then it is a CCPM control system. If that systems uses mixes in the radio software to tell the swashplate what to do, using mixing between three servos, then it is an eCCPM system. If it uses mechanical linkages in the heli (like your Raptor) to mix the commands before they go to the swashplate (where each servo will only perform one function) then it is an mCCPM control system.
CCPM actually stands for Cyclic Collective Pitch Mixing.
It is required on ALL CP type of helis with a sliding swashplate. It was initially used to define helis that used a sliding swashplate mix and transfer the collective servo and cyclic servo commands to the blade grip control system that is above the swashplate (most helis in use today use this system) to others that used a fixed (non-sliding) swashplate for cyclic commands to the blade grips while using a seperate system (e.g. sliding washout hub or flybar carrier) to transfer the collective commands. Hence, no Collective or Cyclic mixing anywhere. (By the way, these are the only type that where entirely free of interaction). These type were seen in the past on the German Schluter (now Robbe) machines, on the Kalt and some TSK machines and the Concept series from Kyosho.
So the CCPM (sliding swashplate) systems, as Rafael points out, were either mixed by a mechanical system (properly refered to as mCCPM) below the swashplate in the heli or by the electronics in the radio (eCCPM).
For all intents and purposes, though there were a number of Europen manufacurers that used eCCPM systems back in the earlier days, most helis we saw here in N/A where mechanical mixed sliding swashplate units from Japan or the USA. When the term CCPM really became confusing, was when JR introduced their Ergo series of helicopters. These where the first "volume" sellers in N/A that used the 120 degree electronic mixing system. Unfortunately their advertising spin doctors only referred to it as a their new CCPM system. So many here. for years (and some even today), thought/think CCPM means an electronic mixing system.
That is why many of us long time heli flyers prefer to use the proper terms for the sliding swashplate system - as an eCCPM or. like your Raptor. an mCCPM system.
To conclude, if your heli uses the swashplate to slide up and down the mainshaft to give collective inputs to the head, and tilts for/aft & left/right to give cyclic commands to the head, then it is a CCPM control system. If that systems uses mixes in the radio software to tell the swashplate what to do, using mixing between three servos, then it is an eCCPM system. If it uses mechanical linkages in the heli (like your Raptor) to mix the commands before they go to the swashplate (where each servo will only perform one function) then it is an mCCPM control system.
07-14-2009 | 04:16 PM
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RE: ccpm vs. eccpm
The Raptors are mechanical mix, one servo for collective. You'll normally see ccpm and eccpm used interchangably to mean 3 servos, directly attached to the swashplate and operating in unison for collective and in opposition for cyclic.
Knowing the correct distinction between eccpm and mccpm is less common especially since the majority of todays pilots knew of nothing prior to the Trex.
Knowing the correct distinction between eccpm and mccpm is less common especially since the majority of todays pilots knew of nothing prior to the Trex.
07-16-2009 | 07:47 PM
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From: Cassopolis,
MI
RE: ccpm vs. eccpm
That is why many of us long time heli flyers prefer to use the proper terms for the sliding swashplate system - as an eCCPM or. like your Raptor. an mCCPM system.
