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Home✈️Aircraft🚁HelicopterAlignT-REX 600N › Woof and poof on 600 ?
08-23-2008 03:20 AM  12 years ago
Nalizan

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Coppell, TX 75019

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Well I got rid of the MAHs and now have Radix stick bangers. I swapped the spindle to be sure as well. I have an all new head (metal) with mew balls and links. I have a new quickuk swash as well. New thrust bearings in the grips. I still see the blades go out of track when passing through 0 pitch. No one I have talked to locally has seen this issue on a Trex 600. I am at a loss.

Girard I will try what you suggested tonight and see what I get. If they do not match in all quadrants as you say what does that indicate is wrong ? If I am understanding what you are saying you are wanting to make sure that the pitch remains the same throughout the whole 360 degree rotation of the blades right ?

I did re square the head after putting on the new swash and made sure the links from the see saw to the mixing arm were the same length. I did not check the lengths on the see saw to grips. I will do that as well
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08-23-2008 03:37 AM  12 years ago
Girard Ibanez

rrVeteran

Tucson, Arizona (formally from Guam)

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Check this post out by Tmore. I order one just to keep in my tool box. It will simplify the setup.

http://runryder.com/t453879p1/

http://www.ronlund.com/Merchant2/me...ct_Code=ELRC500

Here's another suggestion.

Turn on the radio/rx and with both hands on the blade grip apply an opposite force.

Check and see for any slop or excessive servo backlash. Perhaps the problem lies in the servos.
Girard I will try what you suggested tonight and see what I get. If they do not match in all quadrants as you say what does that indicate is wrong ?
There is differential in the setup / linkages.
If I am understanding what you are saying you are wanting to make sure that the pitch remains the same throughout the whole 360 degree rotation of the blades right ?
Yes, but also along certain points on the pitch curve from max to min pitch. Is the pitch out of track at "UPright" hover in comparison to an "INverted" hover.

This will tell you that there is an issue and that is why you are seeing the out of track problem.

Please post your results and do by all means get that tool from Ron's.

Team Thunder Tiger
since 6/2005 to 12/2014
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08-24-2008 03:51 AM  12 years ago
WreckRman2

rrKey Veteran

Orlando, FL

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I was having similar problems... changed the blade grips and a new spindle and problem fixed. The grips were really loose.

Do me a favor and look on the top of your grips and see if there is an "A" or a "B" stamped into them. My old ones had the A while the new ones had the B. I think they updated the grips and this is how you tell if you have the newer ones.

________________
David Smith
407.937.9556
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08-24-2008 04:45 AM  12 years ago
Girard Ibanez

rrVeteran

Tucson, Arizona (formally from Guam)

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I don't have a Trex.

I am just concern with the out of track issues with ANY helicopter. Perhaps you can post on the other thread to see if you can shed light on another RC Pilots issue.

Thanks,

Girard

I do recall seeing a video on RR where a blade grip failed. I was wondering if the A was replaced with the B to correct for this issue and also if this will correct with the out of track issue.

Team Thunder Tiger
since 6/2005 to 12/2014
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08-24-2008 05:08 AM  12 years ago
maxxteezy

rrApprentice

texas

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Nazilan has an ALL METAL head. Could it be a problem with the links?YardBird Rc
Team Hardcore
Team LunaTickz
Mikes Hobby Shop
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08-24-2008 06:02 AM  12 years ago
racingstripe

rrVeteran

Sacramento, CA

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question, whats wrong with the mah's? Is there a specific beef about them that can be explained? Just curious to see why no one likes them.
MAH blades are a well made and decent quality. It is the flight performance that suffers, they are unstable.

If I can make a fixed wing analogy, I'd say it is like flying a terribly tail heavy model. Conversely, other blades such as the Radix or Fun-Techs are not as tail heavy.

Another critical factor is the type of rotor head you install blades on to. In you notice, the pitch input on a 600N rotor head is at the trailing edge of the blade. Also, notice that the control ball may be off set toward the blade from the spinning axis of the head.

This is an example of an "un-correcting delta" rotorhead, aka "positive delta".

Contrast this type of rotor head with a Miniature Aircraft rotorhead... the pitch control input is located on the leading edge of the main blades. Typically, this type can tolerate a more unstable main blades (not always true).

Either rotor head design can have the blades go out of track if conditions permit. Loose linkages, washout slide block, poor servos are among just some of the things that may cause woof & poof.

If this were my Trex and I was having out of track issues, I would not have selected stick bangers. Some plain jane Radix would have been my first choice.

andy-
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Home✈️Aircraft🚁HelicopterAlignT-REX 600N › Woof and poof on 600 ?
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