radio glitch on the beam

[beerdeor]

Hi chaps
I have a new problem today uped my throttle curve to 90% flat all was well until about 3 mins into the flight(only hovering at work)
Then i noticed a very slight twitch from the heli two or three times i thought nothing of this then i had a big pitch jump nearly 2 feet up
I landed the heli and the rx was still bound ok so im thinking aybe given the increased head tail speed im now getting static build up ?
If this is the case how do i cure it
What do you chaps think??
One other thing i now have slight tail bounce how to i cure this is it just a case of increasing the gain till it stops
Thanks jim

[acwman]

I've only experienced major glitches on my gaui 100 so far. I solved that by spraying the belt a little with silicone lube spray(Bought from car accessories shop). This cured it completely. I have also done it to my 450 and 500 helicopter, as I have heard of static on these aswell..(Though I never had experienced this)

[SRH990]

I've never suffered from static on my Beam and I run mine on a 6100 receiver plus I run a pretty high headspeed, much higher and I tend to bend mainshafts

What gyro and tail servo are you using? I've got a 401 with an Align DS510 on mine and it's rock solid, nearly as good as my 700.

[rspblake]

Not really heard of a glitch on a beam as yet, although suppose it could happen.

If you have been flying the model fine for ages then look for something loose thats giving a metal to metal noise.. that can cause a glitch..

What Radio type RX?

When you 1st switch on the power to the model does the servos move at all?
thoughts if it moves positive, could you have a bad battery terminal.. it just did a reset in the air.

Increasing the head speed will increase the tail power so you might have to reduce the gain slightly.. also check the gyro is not loose.. or the belt has lost some teeth..

[beerdeor]

The belt is fine gyro is a hg5000 combo which is now solid after a recalibration I will go and chck for loose items now just seems weird it has only happened after i increased the head speed
Will reducing the gain sort the slight tail bounce ??
Cheers all jim
BTW im runnig a dx6i and 6200 rx

[richieclarkie]

What headspeed are you running? Have you calculated it?

I'm running the 8 motor with the 14t pinion and at 100% we've tacked it at just over 3200rpm. It's probably at a max of 3300.

At this point I'd also be checking all your shafts plus your main and tail blades.

[Bruinbear]

Hiya,
Anti-static spray from Maplins.
Mike.

[richieclarkie]

Hey Richie,
Anti-static spray from Maplins.
Mike.

If it is static then surely earthing the boom is the way to go.

However it would be nice to confirm that a too high headspeed is not a problem here.

[beerdeor]

What headspeed are you running? Have you calculated it?

I'm running the 8 motor with the 14t pinion and at 100% we've tacked it at just over 3200rpm. It's probably at a max of 3300.

At this point I'd also be checking all your shafts plus your main and tail blades.

I havnt calculated it richie mainly cos i m clueless as to how lol
I am running the same set up as you just 90% throttle so im guessing that static may not be the answer
cheers Jim

[rspblake]

Going back to this metal to metal noise.

Could even be a bad bearing or something rubbing and locking the head.

Just trying to think why it would jump.

I am 99.9% certain that if it was static produced by the model design then we would of been aware of it a long time before.

It's been out in the USA at least a year before it reached here.

Headspeed, knowing that some have put the large 16 tooth pinion on the 8 motor and run it(which is so wrong) headspeed is way to high, that has not jumped or actted strange.

Ring us later, we can talk about things to look at.

[scallybert]

If it is static then surely earthing the boom is the way to go.

Depends exactly where the static is generated.

IME, (GAUI EP100) earthing connections made no difference, graphite paste did.

[I'm sure other people have had other experiences, though.]

[moyesboy]

I started to have some issues with my 450 after fitting a 720 rather than a 401. However I later found I could get the same problem with the 401.
This was spinning the heli up indoors with no main blades. The rx started twitching the servos and cutting the power to the motor (the problem clearly indicated by flashing on the main rx orange LED).

I found spraying the belt seems to cure it, but leaving it resting in a heated room for a few days meant the problem came back.
Before flying it I connected the battery neg to motor mount, tail front pulley mount, and tail boom clamp. Now it seems to be cured.

No probs, no flashinglights, but only a few flights so far.
I might try the 720 again as it probably wasn't gilty, just marginally more susceptable than the 401.

My 450 has a helidirect g10 superframe which is not conductive.