480 Boom Clamp & Vibrations during 3D Flight

[mahathyr]

Hi guys just wanna know if the way i secure the boom onto the boom clamp is the right way..i just line the boom towards the inner clamp and secure it and just tension the belt from the tail.

Is this the correct way or should i place the boom more towards the pulley?

so far the heli flies great and i have no issues with it. Did about 6 flights today here in Japan and i am very impressed with this heli. It autos very well.

The only thing is that event logs shows all is well during auto-trim flight, normal sport and big air stuffs but when i do 3d flight , Raised, High and Extreme vibrations are on the logs but heli still flies good. Should i be concerned with it?

Many thanks for reading and hoping to hear some opinions. Here are some pics from today flying session.

[corrosionate]

Awww, a kitty! My parents cat used to watch me fly all the time when I stayed there. She would sit on a big rock way back behind me and watch the heli, and sit on the front porch and watch me fly my foamy planes in the yard.

Anyway, if the 480 is anything like the 500/600/600se, etc... it sounds like you're doing the boom correctly. Slide it all the way into the frame, clamp it tight, then slide your tail box back and forth to set belt tension. You may need to tighten the tension if its cold outside. If you set the tension indoors where its warm and then go outside the boom will shrink and cause the belt to go slack. I don't know if its cold where you are, just throwing that out there.

I'm not sure about the vibes during 3d, unless its a slack belt from the cold or something, and sport flying doesn't stress it enough to make vibes....

Best of luck!

Sent from my DROID RAZR HD

[Mentalic]

Originally Posted by mahathyr

The only thing is that event logs shows all is well during auto-trim flight, normal sport and big air stuffs but when i do 3d flight , Raised, High and Extreme vibrations are on the logs but heli still flies good. Should i be concerned with it?

Vibrations are normal with 3d flight from caused by large cyclic inputs. As the rotor spins large cyclic inputs come in and out, and if you look closely you can see the machines shake from it.

[Varelco]

How often are these messages appearing? Can you post up your vbar log please. Raised and extreme vibration events can be concerning if they occur a lot, typically even on my Trex 550 I only see 1 or 2 extreme vibration events per flight.

[mkovalcson]

Some helis do that and some don't.

My similarly sized Protos 500 is very hard to get vibrations on even when I bang it around hard.

However some of my other helis which are very smooth at hover can throw some vibs when they are banged around.

[mahathyr]

Many thanks for your replies..like i said so far no issues and i can't stressed enough how fun this heli is..anyway i have attached the Logs Varelco..manage to have the last full flight on 1 set of the logs.

[dahld]

The fact that "good health" message occur off and on through out the flight, would indicate the vibrations recorded are the result of flight dynamics, and not a mechanical issue.

As a guide, remove the main and tail blades (I think this should always be standard procedure on any heli pre-maiden flight). Run it on the bench while monitoring the vibration analyzer real time, to confirm that there are no mechanical built-in vibrations.

Add the tail blades (have a helper hold the tail), and run it again, to confirm the tail blades don't contribute too much additional vibs.

Make sure your main blades are well balanced (many aren't from the factories...no matter what they try and tell you), and once you've got all that done, go fly.

Do an extended hover at the beginning of a flight (so it is obvious to see in the file), and if you're getting good health messages during the hovering...then go for it, and don't worry about the vibrations recorded from flying 3D. They will be there, but you know it's not from a mechanical issue or blades out-of-balance.

As a reference, because Kyle's flights are pretty much one long continuous 3D maneuver, his logs are a constant record of high and extreme vibrations. But his helis otherwise run smooth.

Hope this helps,

Edit: Oh, and I can't help myself from saying that it's so nice to do the bench vibration check and set-up of the machine etc. using just the transmitter and the heli. No laptop, hand controller, bluetooth, USB cable...just turn on the heli and look at the transmitter (V-Control).

(-: Dave

[mahathyr]

Originally Posted by dahld

The fact that "good health" message occur off and on through out the flight, would indicate the vibrations recorded are the result of flight dynamics, and not a mechanical issue.

As a guide, remove the main and tail blades (I think this should always be standard procedure on any heli pre-maiden flight). Run it on the bench while monitoring the vibration analyzer real time, to confirm that there are no mechanical built-in vibrations.

Add the tail blades (have a helper hold the tail), and run it again, to confirm the tail blades don't contribute too much additional vibs.

Make sure your main blades are well balanced (many aren't from the factories...no matter what they try and tell you), and once you've got all that done, go fly.

Do an extended hover at the beginning of a flight (so it is obvious to see in the file), and if you're getting good health messages during the hovering...then go for it, and don't worry about the vibrations recorded from flying 3D. They will be there, but you know it's not from a mechanical issue or blades out-of-balance.

As a reference, because Kyle's flights are pretty much one long continuous 3D maneuver, his logs are a constant record of high and extreme vibrations. But his helis otherwise run smooth.

Hope this helps,

Edit: Oh, and I can't help myself from saying that it's so nice to do the bench vibration check and set-up of the machine etc. using just the transmitter and the heli. No laptop, hand controller, bluetooth, USB cable...just turn on the heli and look at the transmitter (V-Control).

(-: Dave

Thanks Mr Dahl, I have not done a bench test doing the analyzer but i have done a couple of of 4mins of just Hovering and auto trim..did one 4min flight of sports flying and check the logs that there are no vibes of any sort. Im just gonna go ahead and not worry myself too much now...cheers.

PS: The Vbar control do look interesting but would like to know if mechanically we can adjust the Collective stick travel on the TX and do a calibration? For example when i bought the JRDSX11, i did not like of how much travel was the collective stick so i bought the the Stick Stops and install it internally and did a recalibration.

[dahld]

Q: "...would like to know if mechanically we can adjust the Collective stick travel on the TX..."

A: Yes, the collective stick is equipped with an optional throw limiter.

(-: Dave

[mahathyr]

Originally Posted by dahld

Q: "...would like to know if mechanically we can adjust the Collective stick travel on the TX..."

A: Yes, the collective stick is equipped with an optional throw limiter.

(-: Dave

Many thanks for the info.