Protech ZOOM 425 ccpm Specifications download pdf (Page 37)

Chapter 6. Helicopter Parts Selection

6.1. Control system

6.1.1. Receiver

If you are using a gyro without remote sensitivity (like the GY240) on a fixed pitch heli, then

you only need a four channel receiver (channels 1-4).

If you are using a gyro with remote sensitivity (like the GY401) on a fixed pitch heli, then you

need a receiver which can receive channels 1-5.

If you are using a gyro without remote sensitivity (like the GY240) on a collective pitch heli,

then you need a receiver which can receive channels 1-4 and channel 6.

If you are using a gyro with remote sensitivity (like the GY401) on a collective pitch heli, then

you need a receiver which can receive channels 1-6.

See Section 11.1, “Channel assignments” for individual channel assignments for Futaba/JR

etc. transmitters.)

For a Piccolo you can use a Piccoboard instead. The Piccoboard is a tiny board with a yaw-

rate gyro and two brushed ESCs, one for the main motor and one for the tail motor. The Picco-

board Plus is the same except it can be upgraded to heading hold with a heading hold module.

I haven't tried this, but people have mentioned the GY240 works better than the HH module.

Single conversion receivers will work fine for indoor microhelis, but are not recommended for

larger outdoor helis. The larger motors in larger helis will generate much more electrical inter-

ference which will overload a single conversion receiver and cause severe glitching. A large

helicopter which is out of control is very dangerous! Therefore, use a good quality dual conver-

sion or PCM receiver for larger helis.

There have been many reports of some Berg 4/5/6 channel receivers manufactured after

November 2004 having serious range issues. If you purchase one of these, please be sure to

throughly test it before flying it in a heli.

6.1.2. Antenna

For indoor micro helis on 72 Mhz, the Azarr M72-I works well. This is a 0.3 gram antenna

which is designed for indoor use.

For outdoor helis, the Deans one-piece antenna works well. The two-piece is not recommen-

ded because the threaded coupler can vibrate loose and cause glitching during flight.

6.1.3. Gyros

See Chapter 31, Glossary for a definition of Yaw-Rate Gyro and Heading Hold Gyro .

See Section 30.1.7, “How gyros work” in Chapter 30, Technical Appendix for more information

on gyros.

The first question people invariably ask is: "Can I fly a helicopter without a gyro?" The answer

is basically no. The helicopter's tail would be too sensitive to random air currents. Before heli-

copter gyros were invented, the world endurance record for flying a model helicopter was 5.65

seconds by John Burkham in 1969 in the "Super Susie" model.

1 2 ... 32 33 34 35 36 37 38 39 40 41 42 ... 239 240

No comments

Protech ZOOM 425 ccpm Specifications Page 37