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Other › oh great... sticky collective again...
11-21-2006 02:17 PM  11 years agoPost 1
R0XoRiZoR

rrVeteran

Austin, Texas - US

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Morning everyone...

Here is my deal... Friday night.. I had one of the most flawless flights ever. I have 5 stock 800mah lipos, and all 5 of them were drained from start to finish with little to no effort. Really made me swell with pride as this little bastard buzzed around.

Saturday morning, i got up hyped about getting 5 more flawless runs.. and would you know it... trouble from the start.

As the heli-world turns, this is pretty normal... i have found. Weather changes... wind conditions... temp changes... etc... whatever.. its cool...

BUT!

When i increase pit/thr, i hear the motor wind up.. blades spin faster... but nothing happens much after that. Count to 5. Pow! i gain 10-15ft altitude full blast.

It sounds to me... and feels like... sticky collective.

Anyone else seen this issue?
I don't have any obvious bindings...

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11-21-2006 03:21 PM  11 years agoPost 2
vic20owner

rrApprentice

St. Pete, FL

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Did you already do the sticky fix?

helicopter pilots beat the air into submission

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11-21-2006 03:40 PM  11 years agoPost 3
slider46

rrProfessor

Ocala Florida

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Could also be a servo with a tooth missing on the pitch, it's easy enough to check out.. unplug the motors and play with the collective at mid stick to hover and see if you have a servo jumping or they all move together at least... Otherwise I would tear the head apart and see if something is worn or broken...

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

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11-21-2006 04:21 PM  11 years agoPost 4
R0XoRiZoR

rrVeteran

Austin, Texas - US

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sticky fix?

This is a blade CP Pro, by the way... forgot to mention that i think...

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11-21-2006 04:25 PM  11 years agoPost 5
R0XoRiZoR

rrVeteran

Austin, Texas - US

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I'll check into the servo's... i have a feeling your right...

it would also help explain the odd flight characteristics after the previous day of perfect flying.

I like these servos tho... they are quick enough for me... nice and strong...

Would HS-55's be a suitable replacement? or should i go digital?
(if infact it is the servo's)

If it isn't... ill be tearing into the head. The entire head feels inadequate anyhow... really flimsy and such...

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11-21-2006 07:10 PM  11 years agoPost 6
slider46

rrProfessor

Ocala Florida

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I just put hs55's on my HDX300 (blade on steroids) and they seem to be a bit faster than the efite servos, one crash will be the test for durability...I've had the efite servos go without a crash just some hard flying so you never know when they will strip a gear...

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

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11-21-2006 07:47 PM  11 years agoPost 7
rickvtown

rrNovice

veseli mn usa

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You can get gear sets for the eflite servos there about three bucks and eazy to replace and cheaper then servos

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11-21-2006 08:59 PM  11 years agoPost 8
vic20owner

rrApprentice

St. Pete, FL

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You didnt mention if you've already done the sticky collective fix... (reversing the washers so that the smaller ones are against the bearings).

helicopter pilots beat the air into submission

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11-21-2006 09:02 PM  11 years agoPost 9
R0XoRiZoR

rrVeteran

Austin, Texas - US

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yah... i have no idea what your talking about...

what washers...
what bearings?

que?

Also... when i had my trex... i did NOT like the HS-55 due to their bad resolution (issues with returning to 0 degrees)... is this still a problem? What servo's would be best? (again... in the event it is the servo's.. or if i upgrade later...)

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11-21-2006 10:41 PM  11 years agoPost 10
Gino CP

rrKey Veteran

Philippines

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A bad servo will tilt your heli to one side on take off. 3 bad servos is improbable.

Recheck your pitch. Account for slop by pulling rotor head up when adjusting pitch to zero. Most likely they are going negative .

Check blade grip movement. Any grittiness affects pitch. Both should move freely.

Disconnect motors and throttle up and down, check for hube, blade free movement and within correct pitch range.

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11-22-2006 12:10 AM  11 years agoPost 11
vic20owner

rrApprentice

St. Pete, FL

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Ok your problem is the classic "sticky collective" problem with the Blade and CP2. This is a common everyday problem with a simple fix.

On each side of the blade grip there are two washers. A large aluminum one and a small steel one. What has happened is that the aluminum one has worn and is now touching the outside race causing the blade grips to bind when the head is running high rpms. Uou can't feel this by hand.. it feels fine... it only happens when the centrifugal force is high enough.

Simply remove the blade grips, remove the washers, and reassemble with the smaller washers against the bearings and the aluminum larger washers on the outside of those washers. Below is a cryptic text only diagram of the blade grip and washers.

s = small
l = large
g = blade grip

[l][s][g][s][l]

Sticky collective fixed.

helicopter pilots beat the air into submission

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11-22-2006 04:46 AM  11 years agoPost 12
R0XoRiZoR

rrVeteran

Austin, Texas - US

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wow... i didn't think it was a problem with blade cp pros... but sure nuff... vic20's fix was the ticket.

Thanks :-)

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Other › oh great... sticky collective again...
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