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Home✈️Aircraft🚁Helicoptere-AlignOther › Trex 600 another fatal problem
09-07-2006 02:22 PM  14 years ago
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tungym

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Underground

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Trex 600 another fatal problem
Being a weekday flier, one can be so disappointed to end the whole week fixing up crashed heli due to design failure.

I am not furious but appreciate the Align marketing and business technique.

Once again, I crash my Trex 600 yesterday.

I take off my 600 with 80% throttle. Once in the sky, switch to idel 1 with 100% throttle. Suddenly a high pitch sound squeak and I land the bird. Check the main gear, motor pinion and one -way bearing...all seems normal.

Ok...in front of my friends..watching curiously.....They ask me to check it once again...too hurry as I have to go back home for dinner.

Being confident, I pushed the bird again to the sky and switched to throttle 100% right before an inverted flip. Then it piurotte like crazy and total lost of rudder control.

On the way to retrieved the corpse, I was thinking a loosening gyro? ball link? I was wrong, it was the front belt plastic pulley slipped again the pulley shaft. Damn it! I should have put the new upgrade metal part last time. I should have........

Lucky enough, falling from 40 feet high only damaged the blade, boom but nothing else. The main shaft was bent but I fixed it with 2 pliers.

Also I found the tail blade grip screw was too short. The common breakage point right above the aluminium hub. I change the original M3x10 to a steel M3x12 that deep into the aluminium hub. THere should be 1mm clearance from the tail shaft.
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09-07-2006 02:27 PM  14 years ago
JeffM1999

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Erie, CO

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The main shaft was bent but I fixed it with 2 pliers.
I hate when I see comments like this in a thread bashing a vendor. It is obvious from that statement that you have some questionable building/repairing habits. Maybe you contributed to the failure by the quality of your build.

I am not trying to be a jerk, but there is usually 2 sides to every story.
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09-07-2006 03:08 PM  14 years ago
RCHeliJim

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Orem, UT USA

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I hate when I see comments like this in a thread bashing a vendor. It is obvious from that statement that you have some questionable building/repairing habits. Maybe you contributed to the failure by the quality of your build.
My thoughts exactly.


Go Fly, Have Fun!!
-Team Quick UK
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09-07-2006 03:50 PM  14 years ago
Prolodoc (RIP)

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Cookeville, TN, USA

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Perfect Heli
There are MANY happy TREX 600 pilots out there. I have had no problems with mine. If you are waiting for a perfect heli, you will be waiting for a long time.

As with full scale ships, a good pre-flight is a must.

Sorry for your loss, but this is a good machine.

Later, Prolodoc
I saw an adult one time.....I was not impressed....I refuse to grow up....
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09-07-2006 04:53 PM  14 years ago
caseyjholmes

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Portland, Oregon

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The main shaft was bent but I fixed it with 2 pliers.
you should definatley replace that main shaft. It is the life of your bird.
If you bend metal, then bend it back, it is nowhere near as strong as it was originally. Definatley replace it for sure. If you have trouble locating a main shaft, pm me and I can set you up with one. I think most places should have a small stock of 600 crash parts by now though..
It is not worth the loss of yet another 600 from one small $15 part.
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09-07-2006 05:33 PM  14 years ago
Grant H

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Madison, WI

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The main shaft was bent but I fixed it with 2 pliers.
The next thread we see from this dude will be something like his heli has tons of vibs after his crash and he doesnt know what it is.
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09-07-2006 05:39 PM  14 years ago
Nasscar][

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Delaware

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what type of preflight and post flight inspections are part of your routine?

From experience with plastic parts they tend to loosen after some flights.

With the Tail I noticed that the rudder servo is often loose after 6 flights or so.

Seems like the lock washers just don't like to stay put.

I make it a rule after some many flight to just touch all the screws to check for looseness.


Nas,
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09-07-2006 05:39 PM  14 years ago
caseyjholmes

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Portland, Oregon

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only damaged the blade
Dude, Check on that spindle too. If you broke a blade, there is a good chance you bent the spindle as well. (feathering shaft)
A bent spindle will cause wicked vibes!
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09-07-2006 05:56 PM  14 years ago
Jon the Rooster

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Johns Island, Charleston, SC

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tungym

Reading your post, and It seams your sticking your foot further down you throat Further Than I Ever Have!
Hit the "Preview" before posting to prevent= No creadability!
and one more thing "DON'T BE AFRAID!"
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09-07-2006 06:00 PM  14 years ago
rkeith2

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Norco, CA

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I have found that most times if it is not a fatal problem, the bird tends to warn you with a weird noise or vibration.

That is the time to pack it in and go find the problem -

Too many times I have done that one last flight ....

ouch

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09-07-2006 06:26 PM  14 years ago
Rob_T

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..

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So let's see if I understand you...

You fly - identify that you have a problem and land. Then having not fixed the problem you take off into aerobatic flight and crash. Then you post a thread that sounds like you're bashing the model.

The mistake started at the second takeoff... You knew when you made the first landing that you had a problem to repair. The model should have been grounded (or only test flown very cautiously) until the problem was identified and repaired.
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09-07-2006 07:05 PM  14 years ago
axis

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Lone Star State, USA

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I think what he is trying to say is that had the pulley not screwed up then there would not have been a need for a second take off or the pliers to fix the bent main shaft.. Is the glass half full or half empty? As a manufacturer these are things that need to be looked at. People from all walks of life will be buying the product regardless if it is a TREX600 or a toaster. All must be designed with differences in building abilities in mind. Not bashing the builder or Align ust throwing the thought out there.
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09-07-2006 07:11 PM  14 years ago
JeffM1999

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Erie, CO

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I think the point here is that he didn't ever find the root cause of the problem before taking off again. He just checked a couple things and tossed it back in the air.
Check the main gear, motor pinion and one -way bearing...all seems normal.
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09-07-2006 07:14 PM  14 years ago
RCHeliJim

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Orem, UT USA

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As a manufacturer these are things that need to be looked at.
If I rememebr right, they fixed this tail pulley problem early on by adding a pin to the newer ones. I need to do a search and get the exact details.

I am going to put the metal pulley in mine as soon as I can get one in my hands - but I do check the plastic one each flight by pushing down on it to see if it can come apart.

Hate to see someone crash regardless of the reason.... well I love to "see" the actual crashes in action , but hate that someone has to deal with it afterwards.


Go Fly, Have Fun!!
-Team Quick UK
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09-07-2006 07:17 PM  14 years ago
steve9534

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yakima, wa.

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Helis
I don't know tungym, but a part failed and caused the crash of his heli. Short of testing the entire drive train to failure, I'm not sure how one could identify this problem prior to the crash. I doubt that any of you all would have been happy under the circumstances either. Sorry for what happened. steve.
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09-07-2006 07:23 PM  14 years ago
JeffM1999

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Erie, CO

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I am not taking any satisfaction in his crash, quite the contrary. I just think it could and should have been caught if he would have inspected it thoroughly after hearing the noise.
Suddenly a high pitch sound squeak and I land the bird
When I hear something like that I would think something is spinning on a shaft in a way that it isn't supposed to. I would check all rotating gears/shafts/pulleys and not fly until I found the culprit.
I am definitely not saying I am perfect, I might have missed it too, but I would not have flown again until I tore it down and found the cause.
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09-07-2006 07:25 PM  14 years ago
caseyjholmes

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Portland, Oregon

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There is no question about weather or not the part failed.
I may have done the same thing myself. I'm not quite sure I would look at the gear slipping on the shaft right off the bat. IT could have been anyones mistake.
What the problem is, is how he goes about repairing it
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09-07-2006 07:35 PM  14 years ago
jackheli

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Vancouver - Canada

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If I rememebr right, they fixed this tail pulley problem early on by adding a pin to the newer ones. I need to do a search and get the exact details.
Let us know if you find the details.
It's easy to find an excuse to do wrong. Hard is not to find an excuse to do right.
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09-08-2006 03:02 AM  14 years ago
ShellDude

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East Coventry, PA

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I did read that correctly, then. You straightened your main shaft with two pairs of plyers?

Sorry but this thread fails my valid complaint test
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09-08-2006 04:43 AM  14 years ago
iflybyu77

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Fort Wayne, IN

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Once again, I crash my Trex 600 yesterday.
Does this not say enough? If it crashed before, who's to say it wasn't weakened in the previous crash, therein causing the subsequent failure? That's Align's fault?
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