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Old Oct 25, 2009, 09:41 AM
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Round 2: The LAMA V4 Dual Swashplate Project : Push Pull Straight Link Bell Head

Revisited the Dual Swash Mod and this time with the symmetrical Bell Head Push Pull mechanism and using straight swash to mixer linkages;



This is a continuation of the original concept found here;

http://www.rcgroups.com/forums/showthread.php?t=839154


This time the linkages are symmetrical and straight despite the 90 degree shift. The link configuration follows a PUSH-PULL mechanism minimizing any slop in transmitting the swash pitch data to the upper rotor blades;




The idea is to relocate the mixing arm close to the corner of the grip allowing a straight swash to mixer ball link. The sync arm is then removed (from the original config) and relocated just above the swash using two servo link arms tucked inside the upper shaft sync forks.




Tracking test video;

* Take note of the bind free flybar and how the mixers move with the swash. Such configuration allowed me to maximize the transmission of pitch data from the upper swash to the upper rotor blades.

LAMA V4: Dual Swashplate Flybar Bell Mixing Version 2 : Tracking tests (1 min 29 sec)


Cyclic Punch Tests:

LAMA V4: Dual Swashplate Flybar Bell Mixing Version 2 : Cyclic Punches (1 min 27 sec)


Testing the heli using a short flybar;



Cyclic Punch tests using the short flybar;

LAMA V4: Dual Swashplate Flybar Bell Mixing Version 2 : Cyclic Punches with short flybar (0 min 54 sec)


Simple flight circuit with the short flybar;

LAMA V4: Dual Swashplate Flybar Bell Mixing Version 2 : Indoor circuit with a short flybar (0 min 41 sec)
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