• Verify that the tail drive pulley (red part 934 & 965) is not loose (1degree or 2degrees rotation is enough to create noise!) on the tail pulley holder (blue part 935). Disassemble the red part and look if there is not too much black dust on the blue part (due to rubbing). If the loosiness is not too big, you can clean and CA glue the part together or replace the part 934.


glue part 934 on 935 with epoxy or CA glue.

  • Can be a bad pinion? (not the case on my caliber n°1)

better expalnation:

"Tail clicking noise occurs when the pulley has worn on the shaft. check out the other forum for pictures. you will need a new pulley and then have to glue the pulley to the shaft for a once and for all solution. easy way to confirm this is to hold the head, then try and move the tail rotor. if the tail rotor spins, even slightly, the shaft has begun wearing. You should only feel the resistance of the belt, and no backlash. As for twitching, this often occurs when the tail rod guides are not alligned PERFECTLY, which causes some friction on the rod. The gyro is fighting the friction by commanding more rudder input until the servo overcomes the friction and suddenly drives the tail too far, then the gyro counters this action. the result is the twitching. Both very common problems on the caliber, and should be the first thing to inspect." by vortexgen


comments powered by Disqus

You might like also

Glue your grips on the blade !
Mark the edge of the black plastic part with a pen before removing Thunder Tiger recommend you to glue your blade with epoxy glue. Kyosho say nothing in the manual about this subject. I agree that the Caliber 30 has 4 screws vs only 2 for the raptor 30....but This mods increase security for sure and cost nothing :Remove the blade covering under the plastic blade grips : trace an outline around the grips with a pen. Then remove the …
5293 Days ago
Loose screws in ARF kit
I lost 2 screw (3x6mm) in flights ! crazy they are located in manual page 7, stage 952. The heli produce a metallic noise but I throught it was going from the exhaust. The person on this page report the same problem : http://helico.toutlemodelisme.com/tests/caliber30/page1.htm I suggest to loctite them enough …
5293 Days ago
Danger part ca3035 main mast stopper caliber 30
Kyosho part CA3035 Some parts right out the bag are prone to break. Verify yours and replace them wth a raptor 30 if needed! "Almost directly accross from where the set screw is installed was an imperfection in the aluminum. I pulled on the part with my hands and could spread the piece and it proceeded to break in two. I also tried the same thing on the part with no visible problems and it would not budge." by choppengruvenDiscover …
5293 Days ago
Dual Battery system
 Overall view of my 1st caliber 24.08.2002 Add a dual battery system for more safety. I have no heli with only one battery. Here is why: Problems 1 battery pack 2 packs +mechanicSwitches 2 packs +Electronicswitch Additional cost of system reference + 55€ + 180€ Open circuit between battery and switch's pack Failure Redundant Redundant Open circuit in one of the pack Failure Redundant Redundant Battery short circuit in one pack Failure Failure Redundant One pack not fully charged Failure …
5293 Days ago