Fun, Learning, Friendship and Mutual Respect START  HERE


Unregistered
Go Back   HeliFreak > R/C Helicopter Support > Blade Helicopters (eFlite) > Blade 450X


Blade 450X Blade 450X Helicopters Information and Help


Reply
 
LinkBack Thread Tools Display Modes
Old 06-29-2014, 12:27 AM   #1 (permalink)
Registered Users
 

Join Date: Apr 2013
Default New mainshaft .... bent

Howdy all,
I managed to crash my 4550X on the easter weekend, quite spectacularly I might add and so the rebuild began. A trip to the LHS and bought/ordered pretty much a whole heli's worth of parts (mainshaft, maingear, blades, servos etc etc). After rebuilding and checking the few parts I didn't replace, I found the new mainshaft was bent, as was the second new one in the bag. So I returned them to the LHS who checked them and agreed they were bent. They were sent back to the supplier who also agreed and sent some replacements. This took about 6 weeks as there was apparently no stock in Australia at the time. Fair enough I thought.
In the mean time I found a different LHS(well perhaps not local exactly but I was willing to drive ) who had a set which were definately straight, so I took the trip and picked them up, only to find that they too were bent.
So I was completely stumped when the new replacements arrived from the original LHS and they too were bent.
So I guess my questions are:
Am I being too picky with my expectation of straight?
Is it safe to fly it with this "bent" mainshaft?
Is this more a case of how these items are packaged for transport than an actual manufacturing issue?
I am somewhat paranoid that my AR7200bx is going to spaz out due to this...is it possible/likely?
[ame]http://youtu.be/O9JN0HzcKoo[/ame]
All input is appreciated
Cheers
ahummingbird is offline        Reply With Quote Quick reply to this message
Sponsored Links
Advertisement
 
Old 06-29-2014, 12:43 AM   #2 (permalink)
Registered Users
 

Join Date: Sep 2013
Default

If that's bent then all mine are bent as well. From your video I don't see a lot of movement in the shaft. looks pretty straight to me.
Metroart is offline        Reply With Quote Quick reply to this message
Old 06-29-2014, 12:48 AM   #3 (permalink)
Registered Users
 
Posts: 1,551
 

Join Date: May 2012
Default

There is a chance you bent the rotor head that's why you are having so much trouble with the shafts. Did you replace the head after your crash?
__________________
Blade 450X/450X-3D-HV2/ 550X/300CFX/Goblin-700/2-180CFX/Blade 360CFX/Goblin 380/360 Trio, E-flite Convergence
Microheli Team Pilot
Chris g. is offline        Reply With Quote Quick reply to this message
Old 06-29-2014, 12:51 AM   #4 (permalink)
Registered Users
 
Posts: 803
 

Join Date: Mar 2014
Location: USA and Canada
Default

that is definitely bent, it may be your bearing that are hooped not so much the shaft. just guessing here as you have gone through a few shafts
kik35 is online now        Reply With Quote Quick reply to this message
Old 06-29-2014, 12:52 AM   #5 (permalink)
Registered Users
 

Join Date: Dec 2013
Cool

Are you sure that the rotor hub is not bent/twisted? Also is the feathering shaft bent?
andybennie is offline        Reply With Quote Quick reply to this message
Old 06-29-2014, 01:28 AM   #6 (permalink)
Registered Users
Thread Starter Thread Starter
 

Join Date: Apr 2013
Default

Thanks all for the input
The entire head assembly is new, FS, grips, head, all except the swashplate.
I have also replaced the mainshaft bearings.
Although its a bit hard to see in the video but the mainshaft is oscillating slightly as well which pretty much brings me back to the mainshaft being bent as far as I can tell, rather than a head and/or FS issue although I could be wrong.
I may go buy another whole assembly and try again but after $300 worth of parts, and countless hours trying to isolate the problem, I am a bit hesitant to spend another $100+ on a hope that it will fix it. That's more than half the cost of a new Gaui ....
So do you guys think it's worth puting up in the air or is that still a little risky?
Metroart, you say yours are all like that... does it cause any issues in flight?

Thanks again
ahummingbird is offline        Reply With Quote Quick reply to this message
Old 06-29-2014, 02:11 AM   #7 (permalink)
Registered Users
 
Posts: 2,172
 

Join Date: Oct 2013
Default

After my latest rebuilds, I'm going to have to check main shaft straightness before I install them. I got at least one bent one in the last package. :\
__________________
"Your tone says insult, but what I'm hearing is a tempting offer." ~ Wilfred
mCPX BL ■ 130x ■ Gaui X2 ■
450x ■ Warp 360 ■ 500x 550x ■ Devo 6s v4 Deviation
xenophobe is offline        Reply With Quote Quick reply to this message
Old 06-29-2014, 04:11 AM   #8 (permalink)
Registered Users
Thread Starter Thread Starter
 

Join Date: Apr 2013
Default

Thanks everyone for the advice
I decided to throw the blades on and see what happens ... and... it seemed to fly fine.
I didn't go hard but just a few pitch pumps, flips n rolls and everything went quite ok
No obvious vibes however when hovering it does have a slight oscillating wobble to it centered around the mainshaft. Nothing nasty but very slight and definately there.
Blade tracking actually looks quite good as well. I would have expected to see the tracking out from a bent mainshaft?
I think I will just fly it as it is until either it becomes worse/causes problems in flight, or I crash again
Cheers Luke
ahummingbird is offline        Reply With Quote Quick reply to this message
Old 06-29-2014, 04:40 AM   #9 (permalink)
Registered Users
 
Posts: 2,172
 

Join Date: Oct 2013
Default

I replaced the main shaft because it was giving me a very tiny erratic tail wag that was bugging me. Upon inspection, it was ever so slightly bent. It had not been in a crash and only test flown a handful of times.
__________________
"Your tone says insult, but what I'm hearing is a tempting offer." ~ Wilfred
mCPX BL ■ 130x ■ Gaui X2 ■
450x ■ Warp 360 ■ 500x 550x ■ Devo 6s v4 Deviation
xenophobe is offline        Reply With Quote Quick reply to this message
Old 07-02-2014, 10:28 PM   #10 (permalink)
Registered Users
 
Posts: 7,634
 
My HF Map location
Join Date: Dec 2012
Default

Your head looks like the shaft and head are straight, BUT your button is off center. Try removing it and see what happens. I had one that wasn't able to mount level or centered so I just never ran that head with one and just threw the button out.
RichKnapp is offline        Reply With Quote Quick reply to this message
Old 07-03-2014, 06:40 AM   #11 (permalink)
Registered Users
 
Posts: 549
 

Join Date: Dec 2012
Default

I have 2 metal rails that I know to be straight and have them set up parallel just short of the length of a main shaft. I then very gently roll the shaft along these two rails. They are never perfect because that little swaged bump always seems to be a little off-centre and effects the balance. Just rolling the shaft along a bench will always make it look bent because of the offset swage.

By the way, for some reason the button often lies!
It doesn't take much of a bump to make the shaft look like the culprit. Like Richard said, try taking it off, leave it off of the wobble disturbs you. The proof is in the pudding- the test hover.
Ted
HeliWobbles is online now        Reply With Quote Quick reply to this message
Old 07-03-2014, 06:52 AM   #12 (permalink)
Registered Users
 
Posts: 1,739
 
My HF Map location
Join Date: Sep 2012
Default

Quote:
Originally Posted by HeliWobbles View Post
I have 2 metal rails that I know to be straight and have them set up parallel just short of the length of a main shaft. I then very gently roll the shaft along these two rails. They are never perfect because that little swaged bump always seems to be a little off-centre and effects the balance. Just rolling the shaft along a bench will always make it look bent because of the offset swage.

By the way, for some reason the button often lies!
It doesn't take much of a bump to make the shaft look like the culprit. Like Richard said, try taking it off, leave it off of the wobble disturbs you. The proof is in the pudding- the test hover.
Ted
I found this to be true also.
__________________
Lynx Team Test Pilot
Heli's :mCX2, mSR X, Gaui X3, Logo 480, Goblin 420
Vbar Control
Lu523 is offline        Reply With Quote Quick reply to this message
Old 07-03-2014, 07:00 AM   #13 (permalink)
Registered Users
 
Posts: 200
 

Join Date: Mar 2014
Default

http://www.midwayusa.com/product/310...ty-gaging-tool
I use one of these to check my shafts, and yeah, 4 out of 6 stock Blade shafts have been bent right out of the package.
chuk is offline        Reply With Quote Quick reply to this message
Old 07-03-2014, 09:17 AM   #14 (permalink)
Registered Users
Thread Starter Thread Starter
 

Join Date: Apr 2013
Default

Thanks guys
I had it checked on a cnc lathe and its definately bent.
He's going to have a crack at making a couple for me too
Fingers crossed
Cheers
ahummingbird is offline        Reply With Quote Quick reply to this message
Old 07-03-2014, 10:00 AM   #15 (permalink)
HF Support
 
Posts: 6,529
 

Join Date: Feb 2013
Default

I can't believe Lynx hasn't released a main shaft for the 450X. They've done all the other ones (spindle & tail). I'd gladly buy one from them if I could be more certain I'm getting a good one. While they're at it, if they would make us a more robust split-lock head that would be sweet.
__________________
Gaui X5F 6S (VBar), Lynx 450X-L 6S (Ikon), Lynx 300X-L 4S (Ikon), Blade 180CFX 3S (Ikon)
Lumenier QAV400 4S (Vector), Lumenier QAV250 3S (Naze32/CleanFlight), CYE Stingray 500 4S (TG Multi)
AMA Member, HCAM Member
Nelsonisms is offline        Reply With Quote Quick reply to this message
Old 07-03-2014, 02:54 PM   #16 (permalink)
Registered Users
 
Posts: 7,634
 
My HF Map location
Join Date: Dec 2012
Default

Quote:
Originally Posted by Nelsonisms View Post
I can't believe Lynx hasn't released a main shaft for the 450X. They've done all the other ones (spindle & tail). I'd gladly buy one from them if I could be more certain I'm getting a good one. While they're at it, if they would make us a more robust split-lock head that would be sweet.
Patients

Last edited by RichKnapp; 07-08-2014 at 07:58 PM.. Reason: Some people take it I'm not saying "Pasionts Grashoper" it as a joke.
RichKnapp is offline        Reply With Quote Quick reply to this message
Old 07-03-2014, 08:19 PM   #17 (permalink)
The Airetic
 
Posts: 9,372
 

Join Date: Nov 2012
Default

Quote:
Originally Posted by RichKnapp View Post
Patients grasshopper.
LMAO
__________________
Free Agent....With standalone opinions.
KiloXray is offline        Reply With Quote Quick reply to this message
Old 07-03-2014, 10:58 PM   #18 (permalink)
Registered Users
 

Join Date: Feb 2014
Default

Quote:
Originally Posted by Nelsonisms View Post
I can't believe Lynx hasn't released a main shaft for the 450X. They've done all the other ones (spindle & tail). I'd gladly buy one from them if I could be more certain I'm getting a good one. While they're at it, if they would make us a more robust split-lock head that would be sweet.
If you have seen the vid of Luca flying his lynx 450x he has a DFC head with an obvious lynx main shaft.

On the horizon it looks like.
__________________
mcpx BL, 450X, 600X, Gaui x3, Chase 360, Goblin 500, Goblin 700comp
Pionwave is offline        Reply With Quote Quick reply to this message
Old 07-13-2014, 10:15 PM   #19 (permalink)
Registered Users
 
Posts: 2,172
 

Join Date: Oct 2013
Default

Well, I sure hope they hurry up...

Two new HH shafts... both bent. This has to be laziness or stupidity on behalf of the manufacturing process... someone is taking a shortcut or being lazy. Some machine operator is doing something wrong and QC isn't catching them... or they all just don't care. Ugh....
__________________
"Your tone says insult, but what I'm hearing is a tempting offer." ~ Wilfred
mCPX BL ■ 130x ■ Gaui X2 ■
450x ■ Warp 360 ■ 500x 550x ■ Devo 6s v4 Deviation
xenophobe is offline        Reply With Quote Quick reply to this message
Old 07-14-2014, 08:53 AM   #20 (permalink)
Registered Users
 
Posts: 3,360
 
My HF Map location
Join Date: Mar 2011
Default Απ: New mainshaft .... bent

Did you all started noticing out of the box bent shafts recently or is this an old trend? This is quite interesting, reminds me of 130X bent tail shafts that caused all those problems with the tail.
__________________
Andreas M.
Compass 7HVU
Logo 600SX V2
Blade 450X
Heli.Maniac is offline        Reply With Quote Quick reply to this message
Reply




Quick Reply
Message:
Options

Register Now

In order to be able to post messages on the HeliFreak forums, you must first register.
Please enter your desired user name, your REAL and WORKING email address and other required details in the form below.
User Name:
Password
Please enter a password for your user account. Note that passwords are case-sensitive.
Password:
Confirm Password:
Email Address
Please enter a valid email address for yourself. Use a real email address or you will not be granted access to the site. Thank you.
Email Address:
Location
Where do you live? ie: Country, State, City or General Geographic Location please.
Name and Lastname
Enter name and last name here. (This information is not shown to the general public. Optional)
Helicopter #1
Enter Helicopter #1 type and equipment.
Helicopter #2
Enter Helicopter #2 type and equipment.
Helicopter #3
Enter Helicopter #3 type and equipment.
Helicopter #4
Enter Helicopter #4 type and equipment.

Log-in


Thread Tools
Display Modes

Posting Rules
You may post new threads
You may post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are On
Pingbacks are On
Refbacks are On




Copyright © Website Acquisitions Inc. All rights reserved.
vBulletin Security provided by vBSecurity v2.2.2 (Pro) - vBulletin Mods & Addons Copyright © 2020 DragonByte Technologies Ltd.

SEO by vBSEO 3.6.1