Specifications
26.2.3. Tail wags (hunts) constantly with HH gyro ................................... 145
26.2.4. Tail swings 30-90 degrees abruptly then corrects itself ................. 146
26.2.5. Tail servo responds in one direction only ..................................... 147
26.2.6. Tail drifts as battery discharges .................................................. 147
26.2.7. Tail motor runs at low throttle ..................................................... 147
26.2.8. Tail servo creeps or does not recenter ........................................ 147
26.2.9. Tail servo travel is unequal ......................................................... 147
26.2.10. Tail motor has insufficient tail thrust .......................................... 147
26.2.11. Tail servo travel is not settable using Transmitter EPA with heading
hold gyro .............................................................................................. 147
26.2.12. Tail servo moves in the wrong direction with a heading hold gyro. Re-
versing the transmitter rudder channel has no effect. ............................... 147
26.2.13. Tail drifts during flight with heading hold gyro ............................. 148
26.3. Throttle/ESC problems .......................................................................... 148
26.3.1. Motor ESC will not arm, or motor runs at zero throttle .................. 148
26.3.2. Lost throttle control .................................................................... 148
26.3.3. Motor does not start turning till about 40% throttle ........................ 148
26.3.4. Motor surges with governor mode ............................................... 149
26.4. Swashplate problems ........................................................................... 149
26.4.1. Cyclic servos wiggle around when motor is running ..................... 149
26.4.2. eCCPM swashplate does not move correctly. .............................. 149
26.5. Glitching .............................................................................................. 149
26.6. Other problems .................................................................................... 150
26.6.1. Heli twitches randomly in roll/pitch/yaw ....................................... 150
26.6.2. Short flight times and/or not enough power .................................. 150
26.6.3. Slight tilt to the right (or left) ........................................................ 150
26.6.4. Unstable hover or wobbling ........................................................ 150
26.6.5. The blade tracking becomes worse at higher head speeds. .......... 150
27. Electric Helicopter and Parts Vendors ............................................................... 152
28. Frequently Asked Questions ............................................................................ 159
28.1. General questions ................................................................................ 159
28.1.1. How much does it cost? ............................................................. 159
28.1.2. How high will an R/C helicopter fly? ............................................ 159
28.1.3. How long will an R/C helicopter fly? ............................................ 159
28.1.4. How fast will a helicopter go? ..................................................... 160
28.1.5. What is the best helicopter? ....................................................... 160
28.1.6. Which helicopter should I buy? ................................................... 160
28.1.7. Should I buy an ARF helicopter? ................................................ 160
28.1.8. How does an R/C helicopter fly inverted? .................................... 160
28.1.9. Why does a CP helicopter handle wind better than an FP helicopter?
............................................................................................................. 160
28.2. Transmitters ......................................................................................... 160
28.2.1. What is the difference between an airplane transmitter and a helicopter
transmitter? .......................................................................................... 160
28.2.2. Can you give me your transmitter settings for helicopter X? .......... 161
28.2.3. Which receivers are compatible with my Walkera transmitter? ...... 161
28.2.4. Which transmitters are compatible with my Walkera receiver? ...... 161
28.2.5. Which transmitters are compatible with my E-flight Blade CP receiver?
............................................................................................................. 162
28.2.6. What is the difference between FM, PPM, and PCM? .................. 162
28.2.7. Can I use a JR/Graupner/Futaba/Robbe PCM reciever with my JR/
Graupner/Futaba/Robbe transmitter in PCM mode? ................................ 162
28.2.8. Can I use a crystal from manufacturer X in my receiver from manufac-
turer Y? ................................................................................................ 162
28.2.9. Can I use a single-conversion crystal in my dual-conversion receiver?
............................................................................................................. 162
28.2.10. Can I change the transmitter channel by changing the transmitter
The Electric Helicopter Beginner's Guide
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