What's the difference between a 4 ch and a 6 ch heli? - RC Groups
Dec 29, 2010, 10:09 AM
Newbie
Question

# What's the difference between a 4 ch and a 6 ch heli?

hi there,
being a total newbie to rc helis, I was wondering what the difference is between a 4ch and a 6ch helicopter?

what can the 6 ch do that the 4 ch can't do?

thanks a bunch
rsnail
 Dec 29, 2010, 10:25 AM Cranky old fart Uhhhh.... 2 channels? In simple terms, 4 channel helis are fixed pitch. 6 channel helis are variable or collective pitch... but they really only need 5 channels. Fixed pitch (FP) helis have rotor blades set at 6° to 10° degrees pitch and control altitude by increasing and decreasing throttle. Variable pitch or collective pitch (CP) helis have relatively fixed throttle positions and change altitude by altering blade pitch. CP helis can adjust pitch to negative, so they can fly upside down, and have very sharp response. FP helis tend to float more, because it takes time to react to changes in throttle. They both offer different challenges learning to fly them. The biggest distinction between them is FP helis are much more simple and durable.
 Dec 29, 2010, 10:27 AM Newbie oohh I see.. So the two channels (servos for example) can rotate the blades. Thank you balr14
 Dec 29, 2010, 10:38 AM Newbie oh also, what does 3D mean? man, I might need a beginner's r/c dictionary..
Dec 29, 2010, 10:47 AM
Registered User
Quote:
 Originally Posted by RocketSnail oh also, what does 3D mean? man, I might need a beginner's r/c dictionary..
 Tareq Alsaadi flying his MSH Protos (4 min 0 sec)

This is 3D
 Dec 29, 2010, 11:05 AM Newbie oh okay I see, thanks again for the vid!
Dec 29, 2010, 11:45 AM
Cranky old fart
Quote:
 Originally Posted by RocketSnail oohh I see.. So the two channels (servos for example) can rotate the blades. Thank you balr14
Actually, with collective pitch, 3 servos rotate the blades; the pitch, aileron and elevator servos all work together. The throttle is the 4th channel and rudder is the 5th. The 6th channel is used only for remote gyro gain settings and is not required.
 Mar 25, 2013, 03:01 AM Registered User I would definately recommend the 4-channel for a beginner. With the 4-channel, you can control its vertical position, as well as spin it left/right, slide left/right, and move forwards/backwards. Basically, you can maneuver just like a real chopper. The 6-channel choppers are a bit more complex, and thus more difficult to fly, especially for a beginner. Maybe the Falcon 40 (Exceed RC) or the Dragonfly #4 (Walkera). Both of those 4-channel units are built pretty well, and the replacement parts are pretty reasonable. Regards. Andy.
Mar 25, 2013, 12:28 PM
Zipties and Velcro
Quote:
 Originally Posted by RocketSnail oh also, what does 3D mean? man, I might need a beginner's r/c dictionary..
I know what you mean Its not hard enough learning to fly one. You also have to learn what the heck people are talking about