Effects of Pylons?

[max2741]

Was out with me Titan yesterday doing a few circuits, at our heli club there are a few pylon across the back of the field, while hovering approx 50 meters from the pylon my heli just slammed itself to the ground.
Battery strenth was good pitch etc all working still, cant find any obvious reason for the crash so i wondered if it could be affetcted by the pylons?

Titan, Beastx, Dx6I.

[Paulice]

We used to have this problem with 35mhz years ago, there were dead spots where we would get interference every time we pasted through, but i've not noticed it on 2.4ghz.
But any electrical field can and will affect radio waves in one way or another, best is to stay clear if you can.

[coolice]

Hey.

Also might be good idea to change your failsafe settings as well, sounds like in a hold situation your model goes to full negative pitch?
Try setting low throttle but 0 degrees pitch so in a failsafe hold the throttle dies as normal but the heli floats on for a bit, hopefully long enough to regain control and land.
.

[max2741]

Hey.

Also might be good idea to change your failsafe settings as well, sounds like in a hold situation your model goes to full negative pitch?
Try setting low throttle but 0 degrees pitch so in a failsafe hold the throttle dies as normal but the heli floats on for a bit, hopefully long enough to regain control and land.
.

Not quite sure what settings you mean, could you explain a bit more please.

[coolice]

Not quite sure what settings you mean, could you explain a bit more please.

Hey buddy.

When you bind a Spektrum 2.4ghz set you are also teaching the system what position the servo's need to move to in any failsafe situations, this means where ever your sticks are when binding if you turn off the transmitter to simulate a loss of control your servos will go to the position they were in when bound.

There are two ways in which this can be set, dependant on receiver used from memory;

1. Pop the bind plug into the receiver and bind with it still in place. This lets the main servos hold their last position during a failsafe, but the throttle is set by the user and is set to where the throttle stick is during the binding process. As an example this will be in the fully closed or tick over position.

2. The second method is to insert the bind plug and turn on the model, then remove it before binding by turning on your transmitter. This sets the recevier into a user set servo position hold during failsafe, meaning you can assign where all the servo's go during a lockout.

Now this is the tricky part, but there are easier ways. I do as per point 2 above, but on turning on my transmitter with the bind button pressed I move my throttle stick to the mid position to set 0 degree's pitch and flick my hold switch on to set tick over on the engine. You can alter your pitch & throttle curve to a straight line temporarily to achieve the same thing without having to fumble switches etc.
What this does is set the mian blades to 0 so in a failsafe the model is not going to shoot upwards with + pitch or downwards with - pitch and your throttle goes to tick over, so if the model does come down it's not going to thrash about under power (hopefully).

By going to 0 degree's pitch the model will float for a short while before slowly sinking to the ground, in your scenario above it would have just floated back to ground rather than driven itself towards it.

You can test where your current failsafe settings are set to by powering up your model, popping the sticks in any positions and switching off the transmitter. I'm guessing the pitch will be going to the maximum negative value you have set explaining why it shot down quickly when you had problems.
.

[JohnJ]

I know this vid has done the rounds before but I thought I would re-post it as it shows what happens when you go too close to a Mobile Phone Mast, we are talking much nearer the mast than my transmitter here so the lesson for that day was "Keep Away From Masts" !!!

YouTube - Trex 700 Goes In .avi

[mattydred]

ive started flying fpv and my wireless video system is on 2.4ghz. everytime i fly over a certain spot in the field the 2.4 video signal always drops out in the same spot. theres nothing in the field but it always does it.

i can fly within a few feet of mobile phone mast and it doesnt affect it at all

[xygax]

Pylons dont generally emit RF radation it tends to be electromagnetic radation. This is in a cylindrical field around the cables. For 400Kv pylons (the ones with the longest insulators) there is a saftey distance from these cables of 3.1M go inside this and there is a chance it can jump the gap. Elecrticticy can jump 1mm per 1000V so 400Kv will jump nearly half a meter in dry air.. so with a bit of airborne moisture you can easy double that....!

if it were me... Stay as far away as possible... a different field is ideal

Steve

[cjcj1949]

Could you expand on this so that the order is clear. I was told by HH that my AR6200 would only fail to same position. I would like your method to work for my glider.

2. The second method is to insert the bind plug and turn on the model, then remove it before binding by turning on your transmitter. This sets the recevier into a user set servo position hold during failsafe, meaning you can assign where all the servo's go during a lockout.

Chris

[max2741]

Managed to get the throttle to fail on tickover but the cyclic pitch will not fail at 0 Deg, i suppose the BeastX is part of the problem, any ideas?

[waveydavey]

The Beast shouldn't be a problem, are you using it as the main receiver? Have you got a spare receiver you can use just to check it.

Ian, great advice mate.

[davie]

as far as im aware spektrum only failsafes the throttle the rest stay at "last best signal" so there is no way to set individual channels , unless anyone knows any different please post up , im shure the manual states only throttle ??? edit that will teach me to read everyones posts lol
after reading you post ian how can you bind without the bind plug ?? i thought you had to have it in to bind i have read your post a few times and i cant make sence off it
how do you finnish your binding with the plug out ?
does the receiver stay in bind mode untill you power off ?
not having a dig just dont quite understand how you do it as i thought you could only bind when the receiver lights are flashing in bind mode then once your radio and receiver have binded the light stops flashing do you rebind again to set up your servo position ?

[xygax]

A little about bind...
The spektrum bind function is instigated by having a link across the bind pins at powerup. This link only needs to stay there until it is registered as "in bind" and the orange led is twinkling. It will go out of bind if it sees a TX signal and responds to it and the handshake completes (Led flashes slower then goes solid) or you power down ( it maintains its previous bind) and I think the only failsafe is the throttle....

Steve

[davie]

thats what i though steve

[max2741]

The Beast shouldn't be a problem, are you using it as the main receiver? Have you got a spare receiver you can use just to check it.

Ian, great advice mate.

Still got the AR6200 attached, the only and the only channel that does not go through BeastX is the throttle.