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HelicopterBeginners Corner › Bades flapping with idle up one switched on.
04-28-2004 02:50 PM  13 years agoPost 1
rcheliheaddaz

rrApprentice

Sth Wales / UK

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Hello Guys just changed radios and can now start to have some fun with Idle up switched on, BUT when I swich Idle up one and go to lift of the rotor blades seem to flap like crazy. Or at least it looks like one of them is moveing and the other isnt.

In normal flight the tracking is fine and I have a realy smoth time of it. everything is fine. I suspect that maybe I need to just tighten the blades more, though they seem fine. I have only just converted to my ff8 after a long time getting to a standard that I think lets me step up for some more fun. but this has got me gutted and nervous.

I have checked the pitch of the blades is equal through the throttle range and they seem fine. the balance is good the tracking also so why am I getting this? Please help.

Thanks in advance of any input.

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04-28-2004 03:05 PM  13 years agoPost 2
comet

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Neuilly sur Seine, Fr

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seem to flap like crazy. Or at least it looks like one of them is moveing and the other isnt
so is there, or does it look like?

because if there was, you would have to land immediatly
I suspect that maybe I need to just tighten the blades more
Well
The more you tighten your blades
the less lead/drag effect can occur
the more flapping you will have

You probably need to tighten them up more than the side test though, especially for AR.


Now, I don't know if what you are talking about is a stroboscopic effect. (visual effect due to high rotating speed of the object)

Of course you checked your blades/root, spindle/bearings/main grips.

VT "slow&low"

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04-28-2004 10:41 PM  13 years agoPost 3
rcheliheaddaz

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Sth Wales / UK

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Thanks Comet,

However as I already stated I checked to make sure that the blade pitch seems fine through the throttle range. equal on both blades throughout.
thankfully the flapping came on before I was off the floor and yes even a monkey would have figured that if it was in flight that you would need to land immediatly.

Lead and lag/Drag is nessacery for the blades to stay equaly ballanced dureing rotation I am aware of this too. Buy AR I take it you mean atorotation! this I also know.

Remembering that you are supposed to be offering advice to a novice what the f**k is stroboscopic affect!!!!!! Thats realy going to help DUH.

Yes I get it you know more than I and your very very clever,
Now how about some advice?
If you can't do it in a manner that will help rather than critisize, I dont want to here BS.

This is help???

Again thanks in advance to anyone that CAN give some advice/input.

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04-28-2004 11:13 PM  13 years agoPost 4
A. Bundy

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Aurora,IL. 30W/SW of Chicago

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Be more specific about exactly whet the heli is doing so we can help more.....How tight are the blades?What blades?What heli?Pitch range?Is the throttle difference between Normal and Idle up a lot?....What ever you can add will help.I'm trying to understand what the blades are doing-Fluttering or going out of track or just the heli bouncing side to side on the ground.

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04-29-2004 10:05 AM  13 years agoPost 5
rcheliheaddaz

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Sth Wales / UK

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thanks A B

Well the heli is a nexus 30 with glass fibre/carbon blades. the itch range I have is -5 to +12 the throttle difference between just below mid stick and idle up 1 is not a great deal, just enough to here the engine revs pick up and the head speed increase. The blades where tight to the point where if you take i finger and tap the blade it will step out of line. but when the heli is in normal mode and flying the blades are lovely and in track, However when I land bring the throttle to just below mid and turn on idle up1 all goes great. The engine revs increase the head speed increases and all is fine. then when I go to take of I increase the pitch to lift and just before the point where it lifts to hover. I get a really bad flutter in the blades.

I got down on one knee to look at the blades side on and got to the flutter point a few times and it looks as if only one blade is changing pitch. when I stopped the heli and did the checks for this both blades move there pitch equaly. I dont understand what could be causing this.
I have the standard settings for idle up in the futaba manual for ff8. these are throttle curve 57,55,57,75,100% pitch curve settings -2.5, for 10% +4.5 for 50% +8 for 80%. revolu idle1, -20, -10, 0, +10, +20.

thanks for the reply.
Daz.

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04-29-2004 02:31 PM  13 years agoPost 6
SPB

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Athens - Greece

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Hey Daz. Relax man.

Comet was only trying to help. The truth is that you are not very specific. You are just saying you have a flapping sound from you blades. So do I and everybody else here. The blades are flapping.

You are seeing things from a wrong perspective. Chil out.


Sotiris
myhelis.com Flying Team

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04-29-2004 06:45 PM  13 years agoPost 7
A. Bundy

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Aurora,IL. 30W/SW of Chicago

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Well,I can't see why it would not flutter in normal as well.I would first look to eliminate any control system slop.Anywhere that the blades can rock back and forth is bad.My next thing I would do if it was mine is put good quality blades on.I run my blades pretty tight.

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04-30-2004 01:23 AM  13 years agoPost 8
rcheliheaddaz

rrApprentice

Sth Wales / UK

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thanks AL

Thanks for the help and confirming that it is just a case of try allsorts and hope this turns something up. I completely stripped the head today and rebuilt it. The blades are not cheap and others have never given me problems when I have broought the head speed up before however I will get a good set of nhp razor sticks to put on.

If I do find out what this is being caused by I will post to let any others know what it was. Though I have a feeling I am going to change helis pretty soon thinking of a raptor 30 or Caliber 30. leaning toward the caliber.

I think that I might just be asking to much of the Nexus.

thanks a lot ppl.

Oh and spb, Did I say flapping sound or is that what your brain interpreted?
My blades rotate thanks do you know what flap means?
birds flap there wings, rotor blades flapping means that you aint got a heli the worst that you get is a flutter and that is only temperary.
is this chilled enough. ICE,

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04-30-2004 04:57 AM  13 years agoPost 9
SPB

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Athens - Greece

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I really don't care what's the problem of your heli. With this attitude I don't think that I will ever spend any time to help you.

You have a bad attitude that's all and this is not what we have used in this forum and this hobby in general. Sooner or later you are gonna need somebody's else help and you are gonna post again here. Do you really believe that comet is gonna help you next time?

He didn't mean to insult you and no one here does. You are thinking in a negative manner for others and this is obvious in your replies and your overall behaviour.

Anyway I really don't care it's your choise how you are going to behave and what are your longterm expectations from this hobby.

BTW ice is what I really need now. Summer is coming and temperatures here in Greece are really high


Sotiris
myhelis.com Flying Team

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04-30-2004 05:02 AM  13 years agoPost 10
S_Owen

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Wichita Falls, TX.

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What brand of blades? Some are very aggressive and have odd CG's. They can cause flutter all by themselves.

[b]Murphy's Constant:[/b] Matter will be damaged in direct proportion to its value.

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04-30-2004 09:22 AM  13 years agoPost 11
comet

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Neuilly sur Seine, Fr

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I will help anyone on this forum that I may be able to help.

Now, if I don't understand the problem so well, I'll try to figure it out with the other guy, caus that's already part of the help.

Now, if that person is reluctant to my help, or can't figure out what the problem really is, for sure, I will not be able to help anymore.

Simple thoughts about a great hobby and a great forum.


Anyways, those Nexus heads are really soft crap.

VT "slow&low"

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04-30-2004 11:58 AM  13 years agoPost 12
rcheliheaddaz

rrApprentice

Sth Wales / UK

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Nexus in general is!!

Yes I know all about the Nexus being a badly designed heli and being of crap build quality and I have had all this said before. Thanks,

However for a heli that I was told wont fly straight and wont do this and wont do that and has siht this and siht that, ( I ) like it, I like the challenge it has given me and it feels good when People that know what a problem heli it is say it's flying well. Thanks to those guys and gals,

Now ( As I said ) I suspect that I am comeing to the end of what the heli will do so I am concidering a change of heli.

I still class myself as a bedinner when it comes to stunts and useing the idle up function with this heli. But I can do rolls and stall turns and loops with my standard focus heli 5 radio. I aint asking you to teach me how to listen to bullsiht though I've heard enough already.

For those of you that are genuine about helping others and not looking like (Mr Big look how good I am with big words that dont mean jacksiht) and other coments that no beginner is going to understand. ("I am sorry for this very negative bit of reading")

SPB ( I wouldn't listen to you anyway )
Comet ( Tell me something I dont Know like those fancy big words you like to confuse others with) (NOT) Anyways, those Nexus heads are really soft crap.

Have a nice day.


Now S_0wen

I have got quick uk Glass carbon blades on. I have done some research and I have come accross a chap who had the foam that is in the core move to the end of the blade. I am not able to do it yet. But when I get the chance I will wind her up and check the CofG to see if it has moved. Of course I will check before and after. this would do it I think. If the foam inside lets go and I bring the head speed up then it could move to the outside edge of the blade. This would throw it out of track and throw the ballance. Thanks,
I still look to see if blades need to be ballanced even if they say they dont.

Thanks again,

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04-30-2004 12:04 PM  13 years agoPost 13
SPB

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Athens - Greece

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Well this guy ain't worth spending my time. Live your miserable life as you like.


Sotiris
myhelis.com Flying Team

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04-30-2004 12:28 PM  13 years agoPost 14
rcheliheaddaz

rrApprentice

Sth Wales / UK

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04-30-2004 12:32 PM  13 years agoPost 15
pistole

rrVeteran

Heli Land ....

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I was thinking of pitching in here to help but my time is very expensive ........ and you're too cheap.

Rap70. TT70.Rap50. TT50.RD8000.

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04-30-2004 01:06 PM  13 years agoPost 16
rcheliheaddaz

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Sth Wales / UK

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Or is it that you lost all your expensive time trying to think? LOL

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04-30-2004 02:04 PM  13 years agoPost 17
S_Owen

rrApprentice

Wichita Falls, TX.

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Get yourself a cheapy set of woodies and see if the problem repeats.

Wow. This topic has really gone astray.

[b]Murphy's Constant:[/b] Matter will be damaged in direct proportion to its value.

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04-30-2004 02:13 PM  13 years agoPost 18
rcheliheaddaz

rrApprentice

Sth Wales / UK

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Woodies!!!!! Thanxs

Bugger, got some and didn't THINK of that. thanks,
See I knew someone had some good advice.

Yeah I know thats my fault, Patience is something that I don't have much of." Sorry guys, "

Still think I will change heli's after this. the Nexus has Been to good at throwing curveballs. just when I think I got it sorted then something else crops up.

Mmmmm Raptor or Caliber.

have a nice day,
Daz.

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04-30-2004 08:22 PM  13 years agoPost 19
deckerv

rrVeteran

Wellsville, NY

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Nexus.... are you using 530mm blades or standard 550mm blades.... I ask because I had kinda the same issue with my nexus when I tried to put on standard 550mm carbon blades. I put on some NHP Razor pro 530mm blades made for it and it worked fine... the 550's though made it flutter and/or go way out of track... just a thought anyway

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04-30-2004 09:50 PM  13 years agoPost 20
rcheliheaddaz

rrApprentice

Sth Wales / UK

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I have the standard 530's on it thanks Deck.
However I am now saving to get a set of nhp razors now and will try those,
Thanks for the advice.
Happy flying,
Have a nice day,
Daz,

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HelicopterBeginners Corner › Bades flapping with idle up one switched on.
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