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Blade
Other › Blade Twitching up and down
02-08-2006 12:54 AM  12 years agoPost 1
The_Bullpup

rrApprentice

Dallas, Texas

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I was wondering what the most common causes of a Blade twitching up and down are. It is very random, and not too frequent (there is usually at least 10-20 seconds in between twitches). It started after I took everything apart to get the main shaft out. I was inspecting the shaft for a bend, but did not find any. Any ideas? could I have put the shaft retaining collar on to tightly perhaps?

~David--Dallas, TX

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02-08-2006 02:39 AM  12 years agoPost 2
slider46

rrProfessor

Ocala Florida

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Check for play in the main shaft see if you can move it up and down with your fingers you need about 1/32" play maximum...
Also check your flybar assembly to see if it has play in it. Or your paddles are inline with each other and level with the swash plate... Let me know what you find

Tom..... No "D" flying....

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02-09-2006 04:44 AM  12 years agoPost 3
The_Bullpup

rrApprentice

Dallas, Texas

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my shaft DID not have play in it. If anything, it was too tight possibly. (notice i say did not, well that is because I bit the dust earlier today... whoopsee. I'm replacing the main shaft because the gear got all messed up). Anyway, how do you check for play in the flybar assembly? I dont have a pitch gauge, so I just had the paddles as good as I could get them by eye. I noticed that one was slighly longer than the other, I think, becuase when the blade is rotating I can see two seperate outlines of outer flybar weights. They outlines overlap about halfway, so its not too incredibly off.

Can anyone recommend a good pitch gauge? does the one used for TRex'es work for the blade? if so, where can I purchase it?

~David--Dallas, TX

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02-09-2006 09:59 PM  12 years agoPost 4
slider46

rrProfessor

Ocala Florida

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David I got my pitchguage from Dee Tee or heli direct I forget which one as I buy so much online.. But you don't need a pitch guage for the flybar paddles. Use a tape measure and measure from the end of the paddle to the center of the screw in the head, that dimention should be EXACTLY the same, if not adjust the distance and your good to go. Also eyball your paddles to see if they are level with the ring the flybar slides thru on the head, if they are both exactly parallel to the ring them they shoud be parallel to each other and you can sight this accross the head too....

Tom..... No "D" flying....

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02-10-2006 12:23 AM  12 years agoPost 5
The_Bullpup

rrApprentice

Dallas, Texas

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k that is good to know cause that is exactly what I have been doing for the pitch angle. I have never checked length, only balance. I have it very balanced right now (just balanced it about 30 min ago) but for all i know the length could be way off.

~David--Dallas, TX

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02-10-2006 03:30 AM  12 years agoPost 6
L0stS0ul

rrApprentice

Virgina - USA

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I am having a similar problem. During a stable hover that seems to have nothing wrong suddenly the heli will drop 2 feet. It always drops. it never goes up. For me it generally happens when I am in idle up mode but I have seen it when I am in normal mode.

I had several problems with my heli that have taken about 4 weeks to resolve but this is the last one for me.

I have finally gotten rid of my glitching problem that I had. My heli used to enjoy beating itself to a pulp when I would set my transmitter down to unplug the battery from the 4-in-1. The heli would just spin up and that would usually take out the blades and the last time broke the blade grip and bent the spindle.

I have now repaired my heli and I have installed a new receiver into the 4-in-1. I now have a GWS R6NII receiver connected and it's now mounted under the main gear towards the rear of the landing gear behind the battery. This has completely solved my glitching. In 4 packs I have not seen an in flight glitch like I used to see.

Since I have had the heli though when in a stable hover about chest high I will hear what sounds like a glitch but is definitally not servo movement. The heli will suddenly fall about a foot and then recover. If I am to close to the ground the heli will smack quite hard.

I have lubed up the head but the problem persists. I will soon buy the bell-hiller upgrade once it is available at my LHS and I am hoping that with new 3 BB blade grips and the upgraded head that the problem will go away.

Frustrating to say the least. Just when you think you have the heli flying well boom... it drops to the ground.

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