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Radio System FAQ

I am new to helicopters and I see a lot of swash types to choose from. What do they mean and which one do I use? Also, what is eCCPM?

Your helicopter manual will let you know which type of swashplate you need to select in your transmitter. Below are listed the main Swashplate types and some information on each.

! Please note that depending on your Futaba radio, you may not have all of these Swashplate type options.

eCCPM is "electronic Cyclic Collective Pitch Mixing", which is both simpler and more responsive than mechanical CCPM. Traditional CCPM systems mix input at the heli, using a complex series of rods to provide control. In eCCPM helis, input is mixed in the radio and there are only three control rods: one for each of the servos used to move the 120° swash plate. This minimizes friction and "slop" losses, resulting in quicker, stronger and more precise control.

There are also basic CCPM types, such as the examples displayed below. CCPM has several advantages over H-1 "Pure Function", the most obvious of which is far less mechanical complexity to properly move the swashplate of the helicopter.

HELICOPTER SWASHPLATE TYPES:

Swashplate Type Settings:

H-1 Type: "Pure Function" or "single servo" (most helicopters use this type). A "single servo" swashplate uses one servo for each axis: aileron, elevator (cyclic pitch), and collective pitch, whereas a CCPM helicopter uses a combination of servos working together to achieve the 3 axes of motion.
H-2 Type: 2-Servos, at 180 degrees to each other. Pushrods positioned as shown. Elevator operates with a mechanical linkage. With Aileron input, the aileron and pitch servos tilt the swashplate left and right; with Pitch input, the aileron and pitch servos raise the swashplate up and down.
HE3 Type: Pushrods positioned as shown. With Aileron input, the aileron and pitch servos tilt the swashplate left and right; with Elevator input, the servos tilt the swashplate fore and aft; with Pitch input, all three servos raise the swashplate up and down. Most commonly used for Electronic Helis.
HR3 Type: Pushrods positioned as shown. With Aileron input, the aileron and pitch servos tilt the swashplate left and right; with Elevator input, the three servos tilt the swashplate fore and aft; with Pitch input, all three servos raise the swashplate up and down.

Additionally, several servos working in unison (ex: HR3, all 3 servos together create elevator movement) dramatically increases the torque available as well as the precision and centering.

HN3 Type: Pushrods positioned as shown. With Aileron input, the three servos tilt the swashplate left and right; with Elevator input, the elevator and pitch servos tilt the swashplate fore and aft; with Pitch input, all three servos raise the swashplate up and down.

! Please note that some helicopters are type HR3 or HN3, except off by 180 degrees.

H-3 Type: 140 degree CCPM. Pushrods positioned as shown. Fundamentally, the servo operations of H-3 type are almost that same as HR3 type. However, the servo arrangement for elevator operation differs. 140 degree CCPM offers smoother operation of the combined servos and an equal cyclic rate all around. On a 120 degree setup, the left/right cyclic is slightly faster than the fore/aft cyclic.
H-4: Pushrods positioned as shown. Swash is a 4 servo ccpm, with the servos at 90 degrees to each other.
H-4X: Pushrods positioned as shown. Similar to the swash H4 except the servos are offset or phased at 45 degrees.

If your model's swashplate is off by 180 degrees, you will still use that swashplate type, but also use SWASH AFR to adjust the functions as needed until it operates properly. Additionally, different angles of CCPM may also be created utilizing the fully assignable programmable mixes.

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