CCPM - A Beginners Stupid Question!

[cyberman]

Are most current heli kits using electronic CCPM rather than mechanic CCPM?
I assume eCCPM is electronic and mCCPM is mechanical.
Finally, am I correct in saying that the transmitter handles most of the complexity of eCCPM setups?

[Rctintin]

Are most current heli kits using electronic CCPM rather than mechanic CCPM?
I assume eCCPM is electronic and mCCPM is mechanical.
Finally, am I correct in saying that the transmitter handles most of the complexity of eCCPM setups?

Most are eCCPM these days.

Yes, e is electronic and m mechanical.

Your Tx will look after the mixing of the 3 chanels. There are some interactions that take place with eCCPM that you have to adjust. This is done with a swash leveler. Your swash should be level at 0 deg and mid stick, and then use your end point adjustments on the Tx to level the swash at full neg. pitch and full pos. pitch.

[chemicalbro]

to be completely accurate there's no such thing as mechanical ccpm

non-CCPM, (for instance on a raptor) is often called Single Servo Mechanical. In simple terms, Single Servo Mechanical control uses a single servo for each control movement, and these servos are completely independent of each other--each has a duty that is distinct on the swashplate. so no mixing occurs
you can mix and match servos in this type of design (for instance have a faster servo on pitch than on the aileron or elevator)

On the other hand, CCPM mixes a combination of the three servos together to complete the control movements. For example, when the collective stick on a radio is moved all three servos will flow in unison to raise or lower the entire swashplate accordingly. In CCPM no swash movement occurs without at least two servos doing the job.in a ccpm setup all servos must be identical

[Bruinbear]

I was just going to say that Alan.
Mike.

[unwind-protect]

to be completely accurate there's no such thing as mechanical ccpm

Well, that depends on who you argue with

"Electronic CCPM" and "Mechancal CCPM" as typically described do have one thing in common: a swashplate that moves up and down the main mast to effect collective pitch inputs. There are systems that transmit collective pitch inputs differently, so the swashplate stays at one place on the mast; these can't really be described as CCPM systems, as the cyclic and collective pitch are mixed far "later" than the swashplate.

Now, I don't think it's a particularly useful distinction, but the eCCPM/ mCCPM terminology seems pretty embedded in the rc helicopter culture now, for whatever reason.

[Rctintin]

I was of the understanding that eCCPM is where the 3 servo's directly control the swash plate as per T-Rex 450/500 etc., and mCCPM was when the servo connects via bell cranks to the swash plate as per T-Rex 700 etc.

Please correct me if I am wrong.

[unwind-protect]

Not really. In mCCPM systems, each servo is responsible for one function (aileron, elevator or collective pitch), and so the "mixing" to move the swashplate (particularly vertically) is provided mechanically. In eCCPM systems, all the servos operate in unison to achieve aileron, elevator or collective pitch controls, and so the mixing is provided electronically, typically by the transmitter.