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Other › Trex SE Tail Pitch Slop
02-13-2006 12:17 AM  12 years agoPost 1
DJT

rrApprentice

Dallas, Tx, USA

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There's quite a bit of slop in the tail pitch change linkage on my new SE tail. It appears to be caused by a very loose fit of the tail pitch slider on the tail rotor output shaft. I searched and did not find a relevant post so I am wondering if it is just a bad piece. Otherwise, does anyone have a fix or any recomendation of an upgrade slider/bridge/bellcrank that works on the SE tailbox.

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02-13-2006 05:33 PM  12 years agoPost 2
Chuckie

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Crofton Maryland

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If you hold the tail control rod stationary and rotate one of the tail blades how much play do you have? I've just finish building an SE and noticed a slight amount of play but as I don't have the heli with me I can't measure the amount. A small amount say .25mm shouldn't be a problem. My 450XL has this much and I've been flying it hard for 6 months.

Charles

Please stand by for faster service!

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02-14-2006 01:06 AM  12 years agoPost 3
DJT

rrApprentice

Dallas, Tx, USA

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Charles,

Thanks for the reply. If I hold the t/r bellcrank and twist one of the blades grips back and forth, I can get a couple of degrees of pitch play at the blade or looking at the ball link on the blade grip, I can move it about 1.5mm with the bellcrank immobilized. I can see that almost all of the play is from a very sloppy fit of the slider on the t/r output shaft.

The lack of response to this post and the fact that I did not find similar posts when I searched suggests I may have just gotten a bad one. I guess I'll either buy another SE pitch slider or look for an upgrade slider or slider/bellcrank that's compatible with the SE tail box.

Incidentally, you guys (MHA) do a great job with the newbie clinic at IRCHA every year.

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02-14-2006 08:12 AM  12 years agoPost 4
ally

rrNovice

Belgium

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I noticed the same tail slop as you described on my SE ... you are not alone

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02-14-2006 12:29 PM  12 years agoPost 5
Chuckie

rrKey Veteran

Crofton Maryland

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DJT,

I checked my SE last night I noticed the tail output shaft moving about 1mm. In my XL I added a washer to remove the shaft end play and it looks like I'll do that on the SE tail as well.

My recommendation is to use the parts you have and make some flights to see how the tail holds and behaves. It should work well even if you have some slop in the control.

IRCHA is always a lot of fun. Maybe we can get Wayne, who does most or all of the talking at the clinic, to expand into TRex sized helis. He's not into these TRex size helis so hit him up with some unique questions on lipo batteries or Trex setup this year to catch him off guard.

Thanks

Charles

Please stand by for faster service!

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02-14-2006 03:28 PM  12 years agoPost 6
Helifool

rrVeteran

Rochester New York

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Mine is very sloppy as well. Im going to try to change the brass sleeve on the tail pitch slider to get rid of the slop. I assumed that this is normal FOR THE SE because of all the other sloppy parts it has.

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02-15-2006 04:51 AM  12 years agoPost 7
DJT

rrApprentice

Dallas, Tx, USA

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Thanks guys, saved me from buying another sloppy slider . HF, if you figure out how to change that slider tube let us know. At least looking at mine, that would solve quite a bit of the problem. Charles is right, it'll work as it is and I'll try it for a while. Based my Hornet days (whoa, definitely NOT the good old days!)though, I'd eventually like to tighten things up a bit. I hadn't even noticed the end play in the output shaft, but I've got a little less than 1mm too. I guess it's easy enough to shim.

David

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02-26-2006 07:58 PM  12 years agoPost 8
lukehall

rrNovice

cambridge

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Hi,

I have just finished my SE and have flown it a couple of times now.

I also have tail pitch slop caused by the slider ring but it doesn't seem to hurt the tail performance at all. with a standard Align 6g servo on the tail and a 401 gyro the tails stay solid throughout and piroette response seems fine. I am just a novice really but if I can get a good stable hover despite the slop I guess it can't be too important!

Also, I noticed that there is a little slop in the upper linkages on the fly bar and head which seems to originate in the metal swash plate. Again, it doesn't seem to hurt the flying any. I am suprised though at how much play there is in the metal swash - and yes, I have checked that it's not coming apart!

Best wishes,

Luke

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02-28-2006 01:34 PM  12 years agoPost 9
Chuckie

rrKey Veteran

Crofton Maryland

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lukehall,

I noticed the same swash play as you. Hold the inner ring and then test the slop by moving the flybar paddles and no play at all. Other head parts are tight after 10 flights. My 450XL after 7 months +400 flights has more slop and requires maintenance by changing the links and balls (aluminum). I did find the blade tracking would constantly change when the links and balls were worn on the rotor head. The tail would wag a little in hard 3d when the links and balls needed replacing. The HS56s developed backlash/ play in the gears after 400 flights but crashing and replacing stripped gears fixed that problem.

The machine will fly just fine with the play you have but keep an eye out for worn parts and replace as necessary.

Chuckie

Please stand by for faster service!

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03-20-2006 05:58 PM  12 years agoPost 10
SolarXtreme

rrVeteran

Arroyo Grande, CA

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Does anyone have a fix for this problem? My tail pitch slider has too much slop in it and is causing an occasional violent waging. I have my gyro set very low (26 ATV, 401 Gyro w/ 9650). The tail holds fine but as soon as I start flying backward or get some side wind the violent wag occurs. All the linkages are free and smooth but the damn tail pitch slider has got some play in it. I tried placing a Shogun bushing in the pitch slider around the tail control pin but there is still slop somewhere in the fork (on the output shaft) itself.
.

I picked a hell of a day to quit drinking

Avant EFX
Freya EVO

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03-20-2006 06:21 PM  12 years agoPost 11
lavarocks

rrApprentice

Rochester, NY

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I glued the shaft into the bearing on the left, looking at the heli from the rear. It takes out all of that play.

- chuckyteets

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