700 fbl

[Arwel]

Test flew my 700 LE FBL today, on it's first tank it was hovering at about 2ft off the ground then suddenly it went in The front left side went down in a blink of an eye. It landed on its skids, if it would have been any higher it would have smashed to bits. I was lucky as there is no damage at all. No confidence in it now really.

Anybody have the same problem? My 600 LE FBL test flight went well

[barney]

Arwel I had a similiar issue first flight but in my case it was the Pitch I lost. I like you was very lucky so was able to trace the problem.

On my 3G the cable at the gyro box end had pushed one of the pins part way back into the its housing instead of entering being a very easy fix

Brian

[Brucehuang]

That sounds scare, I saw videos of the 3g unit has sudden tilt

[Arwel]

When I switch my tx then the rx on on my 700, the swash doesn't always go up and down three times. I switch it all off and try again until the swash goes up and down. Anybody else have the same issues??

[JohnJ]

The setup sequence shouldn't be intermittent!!!!

Definitely a dodgy connection somewhere!

[Gareth-71]

Hi

Sometimes, usually after stand a while, it will not initialise, disconnect and reconnect sorts it all out. Have not had any issues, but I always make sure that it initialises.

Gareth

[Arwel]

Sorry, should have said, this is at the field prior to flight and not during setup

Update! Just swapped the wire from the gyro to the FBL unit and it initialises on every power up now. Will fly tomorrow and post results.

[Tim Procter]

When I switch my tx then the rx on on my 700, the swash doesn't always go up and down three times. I switch it all off and try again until the swash goes up and down. Anybody else have the same issues??

Yep.

My second heli does that Arwel, And has done it again tonight, I reckon the cable from the controller to the sensor wants re-fitting and making sure its secure.

Under no circumstance try to fly the heli if it hasn't initialized properly.

[Wheels]

i have that now and then where it wont initialise but all my servo's are dead at that point so i do not attempt a take off. a simply power off and re-start usually sorts it out.

on another note when flying i sometimes see the tail jump 10-20degs very quickly..then its okay again....anyone got any ideas why that might be.
im waiting for the usb update and hoping that might cure it.

[coolice]

Hey.

3G to gyro sensor leads have been a major point in any problems experienced, in fact my own issue early on was traced to a single pin within one plug bent and not making full contact. You will be wise to check both ends to make sure all is ok before commiting to flight.

Any problems during initialision will most probably be due to the receiver being slow in powering up, or being more accurate the receiver powering up behind the 3G unit. I think this sort of thing is more common on 2.4ghz setups than the older 35mhz due to the spektrums/faast's needing to connect to your transmitter.
Different types of regulator can also influence the startup times of the RC system which then impacts on how the 3G initialises.

Tail kicks were a trait of V1 firmware, indeed my own 700N FBL running V1 firmware I had one tail kick during a flight but then it goes away.
The trick I read and have applied to mine which works is to add in some delay to the gyro on it's last setting stage, I held the rudder stick over about a 1/4" to set some delay. So far my 700 has not kicked since.

The new V2 and now V2.1 firmware have fixed this issue, however as anyone from the MK Heli club who has seen my 700 fly will tell you even on V1 once set the setup rocks
.

[Tim Procter]

The trick I read and have applied to mine which works is to add in some delay to the gyro on it's last setting stage, I held the rudder stick over about a 1/4" to set some delay. So far my 700 has not kicked since.

Which way do you hold the rudder stick to apply some delay Ian, Left or right.

I presume one way adds some delay and the other decreases it.

[squeaky pete]

700 fbl

If its like the gyro tim the delay bit is where u choose model size, so if green is left then hold abit of left, if it red then hold it abit on the red side, if u get what i mean

[Lynx.1677]

I personally think there is a larger issue here with Spektrum radio gear and the 3G unit.

My heli never initialises on first power up. I have to disconnect the battery and reconnect it but without turning the Tx off and on again.

Of course then my Spektrum Rx flashes to tell me I lost connection but I have not had any issues during flight using this method.

works everytime doing it this way. If I turn my Tx off and on again when disconnecting battery it still won't initialise.

[coolice]

Which way do you hold the rudder stick to apply some delay Ian, Left or right.

I presume one way adds some delay and the other decreases it.

Hey Tim.

squeaky pete is spot on with what he has said, basically during the delay setup phase where you set either a RED led for for small helicopters (Trex 250/450) or a GREEN led for larger models (500/550/600/700) by holding the rudder stick over how far you hold the stick over in either the RED or GREEN zone dictates how much delay is set.
One thing to remember is that you need to hold this delay setting position while pressing the SET button to exit the setup procedure, this stores the required amount of delay you are after.

Hey Lynx.1677.

I dont think there is a major issue as such but due to Spektrum taking a few more seconds to initialise than most other things on the model, anything which requires a receiver signal to set is having to wait around. It's in this period that things can and do not set right some times.

Myself I've not had any problems with setting on power up, I am running a V1 FBL unit on a JR 1221 receiver and powered by an ElyQ regulator.
.