RCU Forums - View Single Post - cp/fp setup notes
View Single Post
Old 10-29-2007 | 07:33 AM
  #1  
cx2cp+'s Avatar
cx2cp+
Senior Member
 
Joined: Sep 2007
Posts: 702
Likes: 0
Received 0 Likes on 0 Posts
From: , AL
Default cp/fp setup notes

the micron v2 (world's smallest and most expensive single rotor for its size) commited suicide in mid-air yesterday, looking like a bag of cats fighting as it plunged to the ground - what i found surprised me and led me to some new know-how on setting up the cp and fp

the problem with the micron v2 is that to control weight the parts have to be tiny and tiny parts break easier - which is what happened in mid-air - one of the the servo links to the swashplate broke, which led to the other breaking, which led to the crash because the heli wasn't running true

so, after sweeping up my 300 dollar pile of toothpicks that was the micron v2, on the fp i purposely disconnected the servo to swashplate links and slowly spun her up - the swash was all over the place as the rotor head was not tracking properly!

fp version:

1) remove the rotor head and blades, and the linkages from the swash to the flybar (leave the servo linkages attached to the swash to keep it from flopping around)- spin up the flybar and check the flybar tracking - it should be one perfectly flat line when viewed from the side and the paddles should be perfectly flat and perfectly flat in relation to the flybar control frame - it should also be running perfectly flat in relation to the tailboom

2) put on the rotor head and blades (perfectly balanced) and hook them up to the flybar - spin it up - you now have, for all practical purposes, a 2-channel heli, and you should be able to fly it around like the 2-channel toys !!! with only throttle and tail rotor - work the balance (battery position, even wires) until it will fly, right tail gives forward, left tail gives hover - 0 all the tx trims and replace the links from the swash to the flybar and hover like a pro, correcting any motion by adjusting the servo linkages


the cp version is the same, except the pitch for lift off has to be provided by the servos, so keep the swash to flybar linkages attached and actually unplug the servos from the 4/3-in-1 - set positive pitch by hand - again, fly it around like a 2-channel toy heli getting the balance just right until it flies correctly, then reconnect the servos and hover like a pro, correcting any motion by adjusting the servo linkages

and there you have it - an expensive lesson in variable elimination, but one i can live with cause now i can hover the fp and cp in the box with no problem


edge

man, i'm going to miss the little micron, i'd usually start the day with flying it first cause it was so small - here's a video (not mine): http://www.precisionheli.com/Micron.wmv
i just ordered a brand new 3d walkera palm size (and cheaper!): http://www.precisionheli.com/Merchan...ory_Code=SPECS