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Century Radikal E640 - Swift 16 NX
› Swift vibrations solved
02-08-2006 07:44 PM  12 years agoPost 21
JoeB1

rrApprentice

Ireland, Wicklow

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It looks like the Swift is a true 3D helicopter alright. You have to auto it to land!!!
Cant beleive this is still going on!! I will be waiting for the bugs to be taken out of the heli before I buy any. It is a pity because I want one now!
I think Century should stop any R and D on any other upgrades they have in the line for this heli and spend time on the present product.
It may be only a matter of time before some unexperieced buyer does some damage to himeself/others or property and there will be a big claim. Looking at all the issues posted on this forum will only be amo against Century.

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02-08-2006 09:05 PM  12 years agoPost 22
lowandslow

rrKey Veteran

Spring Hill, TN

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Most all helis have their issues, especially new designs. They can be overcome with a little persistence and sometimes some extra $$. If you want one now, buy it. They appear to be a good little chopper otherwise. Keep in mind that sometimes in a forum it sounds like a particular heli may have all kinds of problems. Generally it's a very small percentage of the overall population who are actually flying them.

For instance, you hear constant complaints about swash plates separating in flight on T-Rex's. Reading the post's you'd think that almost every T-Rex ever sold has this problem. I've had four total and two currently and know a lot of people who fly them and we've never seen the problem.

I have a Swift that I'm finishing up this week. If it doesn't have the issue (I hope it doesn't) great. If it does I'll figure it out and then enjoy the heli.

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02-08-2006 11:26 PM  12 years agoPost 23
dbursch

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Monterey, CA

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Mine just got the vibes...broke the landing gear!!
I have had my Swift for a few weeks now. I had a few vibes on spool up and down...but it was fine in flight with no vibrations at all. I am using 550mm mavrikk carbons..

I just got a NEU 1907-1.5Y...I had flown it once with no problems (same as before...a few shakes on spool up and down). On the second flight I was adjusting the head speed (spooled up once or twice...). I then lifted off and the gear was shaking wildly!!...there must have been about a 6inch amplitude as the bottom of the landing gear vibrated! What was odd was that when it was still on the ground, when I touched the rear of the tail boom, the vibration was minimal. I changed the head speed a couple of times thinking that I must have just hit some sympathetic mode...but no change...and the last lift off the left front landing gear snapped!!

Good thing I had just ordered and rcvd a new head block and grips thanks to this thread....and I had ordered some landing gear a while ago...

That will be my project tonight...I, too, will let you know what I find out!

So...now I'm a "shakey" believer!!

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02-08-2006 11:44 PM  12 years agoPost 24
dbursch

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Monterey, CA

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Update to shakey believer..
I just talked to Antonio at Century...

Since I am so close in Monterey, I will be dropping off my Swift at their shop on Friday...they will take a look at it and hopefully they can figure out what is going on....

I think that they really want to get to the bottom of this....or, dare I say, "smooth" things out!!

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02-09-2006 12:15 AM  12 years agoPost 25
rotaryguy

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Florida

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dbursch
dbursch

You most likely bent the main shaft along with it, they are bendable by hand, I have four bent ones that were the result of the violent spooldowns.

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02-09-2006 12:20 AM  12 years agoPost 26
dbursch

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Monterey, CA

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Thanks Rotary guy...there is definitely something not right...I don't mind driving to San Jose to see if they can figure it out.

When it was flying without the shakes it sure flew well!..."almost" as good as my Logo 14...note, I said "almost"!!

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02-09-2006 01:13 AM  12 years agoPost 27
lowandslow

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Spring Hill, TN

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rotaryguy,

Interesting about the blade grip castings. I just checked mine and they are on the top. It hasn't been in the air yet but hopefully we'll see this weekend.

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02-09-2006 04:09 AM  12 years agoPost 28
dbursch

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Monterey, CA

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Update to shakes
As Century requested, I only replaced the broken landing gear strut (front) that broke...and I will take it to them Friday. However, I noticed that the replacement strut is different then the stock...it has been thickened in a couple of places...I will try to post a picture...different at the greatest bend...and where it meets the skid is bigger...pretty noticeable.

I also noticed that my tail rotor was loose..perhaps to the increased/changing head speed...that could have very well been the source of the vibration...or a result??..who knows!! I tightened up the set screw and I will try spooling it up briefly tomorrow.

So, that is all I have changed...we'll see what Century finds out....

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02-09-2006 05:35 AM  12 years agoPost 29
sparrow17

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Looks like they are making changes to address the issues. As far as the landing skids.

Im about half way through my Swift build and I notice the mold marks are on the bottom of my blade grips
Maybe I should just order some new blade grips now ! scary

Spar~

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02-09-2006 05:40 AM  12 years agoPost 30
dbursch

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Monterey, CA

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The REPLACEMENT (spare) blade grips I got have mold marks on the bottom as well, so that very well may be random....

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02-09-2006 01:37 PM  12 years agoPost 31
Pistol Pete

rrProfessor

Seffner, FL

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if anyone still has the old thin struts...heres a link to what I did to address this issue...but as century has addressed with an updated version...perhaps that would be the way to go.

Now if only they did something with main shaft.

http://runryder.com/t233286p1/

~~Enjoying the hobby one flight at a time~~

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02-09-2006 01:53 PM  12 years agoPost 32
Tim101

rrNovice

wixom, mi

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Pistol-pete [/quote]Did main grips or m4 bolt break?

Did you epoxy plastic root ends to blades as stated in section 9.2?

Glad it missed you...Better luck next time.


the blade broke at the m4 bolt takeing the root ends still glued to it.head speed 1850 & i ballince all my blades so thats not it. i replaced blades, fethering shaft, flybar & padels, mainshaft,& landing gear. it is flying great now? i am testing the new mega motor 22/30/3E & have ben posting resualts with 5s & 6s batts.

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02-09-2006 04:00 PM  12 years agoPost 33
SRH990

rrKey Veteran

Birmingham, UK

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Was it an M4 bolt as the standard is an M3? If so then the blade grips have been modified.

Steve -Trex 700N, Trex 600N, Raptor 550E, 450SE, Mini Titan, Logo 5003D, Beam E4

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02-09-2006 04:38 PM  12 years agoPost 34
Tim101

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wixom, mi

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SRH990[quote]Was it an M4 bolt as the standard is an M3? If so then the blade grips have been modified.

I run m4 but the blade grips nor the m4 bolt was damaged or broke or bent. i diden't replace grips or m4 bolt & it works fine now. I think it was a bad blade or fethering shaft or a combo of both.

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02-09-2006 06:10 PM  12 years agoPost 35
rotaryguy

rrApprentice

Florida

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Tim101...

I think you are missing the point, the blade grips take m3 bolts not m4. So the question was have you modified your grips to accept 4mm bolts or did you mean 3mm bolts.

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02-18-2006 04:04 PM  12 years agoPost 36
Tim101

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wixom, mi

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rotaryguy, [quote]So the question was have you modified your grips to accept 4mm bolts or did you mean 3mm bolts.


Sorry about the delay ben bizzy, I driled out the blade grips to 4M.

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02-19-2006 10:08 PM  12 years agoPost 37
Lenny970

rrNovice

Colorado

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Still can't shake the shakes
Can't seem to cure my bad head shaking (actually, my Swift's bad head shaking ). I tried lubing the O-rings and adding extra shims to no avail. I ordered a replacement head and grips as suggested here. Before trying to install the new head, I checked the fit of the spindle shaft. I found that it was just as tight in the new head as my old one and figured it wasn't worth the trouble to change it out. Instead, I relieved the inside of the old head with a rat tail file until the ball on the spindle shaft slid through easily. I lubed everything up well and put it back together.

A test flight showed that the head wobble was still there.
I then tried swapping out the blade grips for new ones, since I had them, but that had no effect either.

I really like how it flies, but the wobbling head has got to go!


Lenny

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02-19-2006 10:14 PM  12 years agoPost 38
rotaryguy

rrApprentice

Florida

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try a new head block

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02-19-2006 10:47 PM  12 years agoPost 39
Lenny970

rrNovice

Colorado

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New Head Block
Yeah, I suppose I should try replacing the head. I have been reluctant I guess because it looks like a PIA to remove the flybar, etc. to swap out the head. Since the new one feels tight also, I don't have much confidence that it will solve the problem anyway.


Lenny

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02-19-2006 11:37 PM  12 years agoPost 40
Pistol Pete

rrProfessor

Seffner, FL

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i attached the feathering spindle to a drill and used 400 grit to sand down the middle ball to the point where it does not bind inside the head...it helped some....still using original head.

~~Enjoying the hobby one flight at a time~~

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Century Radikal E640 - Swift 16 NX
› Swift vibrations solved
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