Swash separated...

[ukgroucho]

Hmm I though this was a Trex 450 problem.

Landed my Hurri after my second flight today and as it spooled down it developed a horrendous wobble. Luckily it did not tip over...

Anyway, when I looked I found that the swash had separated... the central 'ring' that carries the swash bearing had popped out the top. Thanks goodness it did not do that in flight!

I need to pull it apart to see if I can fix it - if not I have a backup swash here :)

If anyone has any experience with this then guidance would be appreciated.

[ianjh123]

Was this one of the later swash plates that has punch marks on the bottom to stop this happening?

[istandalone]

and is this a standard swash or the one that comes with the xes? or are they the same?

[ukgroucho]

"later swashes with punch marks on the bottom"... i don't know. How would I tell?

This is a swash from a 'complete' CNC head kit so it is relatively recent.
I also have the other swash that came with teh CF frame kit and it looks pretty much the same.

[cd5]

Hey uk have a look at the thread i just moved up the list titled :This is really bad". On page 2 of the thread it has a jpeg picture attached showing what to look for to determine if you have the old swash or the new. Sounds like you may have the old swash as i believe this problem has been rectified. Please let us know if you have an old or new swash. Sorry to bring this thread back up the list i just havent figured out the beast way to cut and paste yet.
Simon

[mjdee14]

http://www.helifreak.com/attachment.php?attachmentid=23243&d=1184850077

see the above...

Thanks for the heads up on this...I checked both my 550's and both are modded....at least now I can peice of mind

[ukgroucho]

My swash has the 'river marks'.... it was only purchased 3 or 4 months ago as part of a CNC head system so it HAS to be pretty new (doesn't it?).

Yes I'm making it work quite hard... my 3D skills are low to moderate but it is running in a high power rig - HOWEVER I'd still hope that the swash would hold together.

Not had time to disassemble (family festive season stuff)... I'll let you know what if anything I find.

[ukgroucho]

See pictures... new type of swash with the 'punch' marks. I put it back together with some red stud locker. I'll keep an eye on it and if that does not hold I have another swash here.

... I wonder if Duzi want to make a Hurri 550 swash ?? :roll:

[mjdee14]

See pictures... new type of swash with the 'punch' marks. I put it back together with some red stud locker. I'll keep an eye on it and if that does not hold I have another swash here.

... I wonder if Duzi want to make a Hurri 550 swash ?? :roll:

UKG..

Looking at your pictures it appears the swash separated at a different location than what the punch marks were meant to stop. The ring with the puch marks stayed in the swash...correct? and the center pulled out...the punch marks would not have prevented that, from what the pictures show...

wonder if we have a whole different problem???

Anyone else agree or disagree...or am i looking at the pics wrong?

[ukgroucho]

Yup.. that was the way I looked at it but I was waiting for someone else to stick their neck out and be accused of being a fool ;)

This is just the central 'bearing/ball with a hole' and it's casing. Like I said it's back in with red stud locker now and I'll keep an eye out for any more movement.

I was incredibly lucky it did not separate in flight. Most likely it would have all gone wrong inverted where the swash would be pulling down - the bearing case popped out the top. As it was it waited until the 550 was spooling down and then had a monster wobble session for 3 or 4 seconds.

[mjdee14]

Yup.. that was the way I looked at it but I was waiting for someone else to stick their neck out and be accused of being a fool ;)

This is just the central 'bearing/ball with a hole' and it's casing. Like I said it's back in with red stud locker now and I'll keep an eye out for any more movement.

I was incredibly lucky it did not separate in flight. Most likely it would have all gone wrong inverted where the swash would be pulling down - the bearing case popped out the top. As it was it waited until the 550 was spooling down and then had a monster wobble session for 3 or 4 seconds.

UKG..

Maybe you should forward the pics to RH and HD...since they seem to be the leading two HS on line in this forum. They may want to pass this along to Gaui...

Or I'll send the pic if y want...


Just when i thought my swash was OK with the punch marks...!!!

[istandalone]

Just when i thought my swash was OK with the punch marks...!

me too. as soon as i first read this thread i opened my xes box (bad boy, bad! that's an xmas present) and saw my swash has the punch/peen marks on it. so, we have another issue? damn. is there something i can do to prevent this from happening? is it maybe possible to pull the swash apart and use some green threadlock on it before it has a chance to separate?

[ukgroucho]

I'll send the pictures to ReadyHeli... I buy a lot of stuff from them. The actual 550 was purchased locally in the UK (customs would have had a field day with a box that size)....

[Happy|Harry]

customs would have had a field day with a box that size....

not so buddy..... . .. twice he he, well not when readyheli send it that is ;)

looking at your pics ukg to help hold it in place you could use longer screws to hold on the balls in the upper swash ring, as the upper swash actually looks to be designed with this in mind, (as it looks like the groove in the middle of the outer casing of the ball in swash would line up exatly with where the screws would exit). or use locktite 671 to hold it in place :)

phil

[Mikej]

not so buddy..... . .. twice he he, well not when readyheli send it that is ;)

Or Flying-Hobby and RC-Expert in my case

[ukgroucho]

not so buddy..... . .. twice he he, well not when readyheli send it that is ;)
phil

Doggamit :bomb:

Ahh well you live and learn.

[Happy|Harry]

I'll send the pictures to ReadyHeli... I buy a lot of stuff from them. The actual 550 was purchased locally in the UK (customs would have had a field day with a box that size)....

groucho did you ever get any feedback from RH or gaui about this? as it's just happened to another H550 flyer :(

http://www.helifreak.com/showthread.php?p=500304

phil

[Madedon]

groucho did you ever get any feedback from RH or gaui about this? as it's just happened to another H550 flyer :(

http://www.helifreak.com/showthread.php?p=500304

phil


I was the unlucky one reported the same problem on X30pilot’s original thread.

What happened was that during flight suddenly I had a very big wobble and I lost control of the cyclic and crash. (I m new pilot and not as experienced in order to recuver).

After a close inspection I found that my swash plate was the new one with the punch marks but I don’t think these would have help with the central ball detaching as these i believe are holding the two different rings together.

Anyway I had to replace mine as it was bended but a possible fix is to CA the metal ring with the plastic ring holding the central ball.

Dimitris

[mjdee14]

OK... I just decided to "press" out the center with the ball so I could put some Locktite in it.... I used two sockets..

It took almost "NO PRESSURE" at all to remove the center....and after I put on the locktite I thought I would have to PRESS it back in....Guess what...it just slipped all the way back by hand...almost no resistance at all !!!

I can certainly see why they are coming apart...there shouldn't be any heat on the swash to make it expand since it rotates with the shaft, BUT this is not a tight press fit....

I think anyone that wants to be safe should take theirs apart and locktite or ca back together, I'm sure glad I did.

Mike

[cba7824]

Mine came apart after a crash I had. While I was taking apart my Heli to inspect everything, my swash plate came apart! :? When I inspected the swash more, there was very little glue on there. I applied JB Weld on there to fix my problem and so far it's been working flawlessly! My guess is that all of Gaui's swash plates have this problem, for I have heard it happening on the Hurricane 200 also.

Charlie

[ukgroucho]

I've had no response from the guys at RH but they did say they would pass the report on to Gaui.

As I said earlier I stuck my swash back together using red stud locker. As has been noted it is NOT hard to push the center back in... this is a 'fingers' job, no need to get clever with a vice and sockets (which is what I would have expected).

I've only had 6 or 8 flights since I fixed it (including my last crash when the main gear stripped) but so far it has not moved. Needless to say I am keeping a close eye on it.

I think my advice would be that folks should 'own' this themselves. Pull your swash out and separate / rebuild with a suitable adhesive. Having this happen when you're doing something high and strenuous is going to make a real mess of the heli... I dread to think what would happen if it separated in the middle of a loop or roll. Apart from the obvious damage from the 'fall' I can see some real potential for a boom strike as the blades spin down - the wobble that you get really is that bad.

[mjdee14]

I think my advice would be that folks should 'own' this themselves. Pull your swash out and separate / rebuild with a suitable adhesive. Having this happen when you're doing something high and strenuous is going to make a real mess of the heli... I dread to think what would happen if it separated in the middle of a loop or roll. Apart from the obvious damage from the 'fall' I can see some real potential for a boom strike as the blades spin down - the wobble that you get really is that bad.


I think i agree with UK on this one...it's not a hard job and it just might save the heli.

You might not be able to push it out by hand...but it won't take much...two sockets work just great. I only used my vise beacuse I thought it might be "tight"...it wasn't.

[Mikej]

I did this myself tonight - very easy 7 links and 1 bolt to undo, done and dusted in about 8 minutes total.

I'm very pleased to report that my swash was fine and is now even finer as I re-assembled with a touch of CA