How much can you move a heli before flight on flybarless?

[wheredidthetailgo]

When I power up my 3GX (500EFL Pro) I do it just before take-off, the only thing I do after is put the canopy. I have read this is imperative since the SAS may get confused before flight on possibly roll over. I do see people power up there electric helis (beastX for example), with throttle hold, on the bench and carry the heli to the take off point without having issues.

Do different SAS units behave differently, I am being to cautious with my 3GX ?

[tsangbou]

I think all the controller power up has the same principal.... Power up and let it initialise for 5-10 secs(till lights all solid) then do what u want.

[ChrisB]

Just power it up and do what you like with it for however long you want to before you actually fly it.

[ghost2212]

It shouldn't matter, The most important thing is that it sits still as it initialises then you can do whatever you want with it until you put it down ready for take off. I arm my 700 in the pits and then walk out to the flight line swinging it about quite a bit. All FBL systems should be the same, If it can't handle it it should be able to.

[Rowey]

Hi,
i too have an 500 efl pro , 3gx 3.1 and like you observed other people powering up their helis and walking them to the point of takeoff. Following them I did the same but found my heli very unstable during takeoff and decided without prior knowledge of an issue that the unit had been confused by 'the walk' . I now always power up like you and have no problems at all .
How do find your efl generally? I know the 3gx has been much debated and slated but I am very pleased , although I have never flown another fbl unit (excluding my sons mcpx bl) I probably enjoy flying my 450sport fb more but put that down to it being less intimidating as my piloting skill level is hovering just above beginner

Cheers

[JoeBailey]

How much can you move a heli before flight on flybarless?

As the others above have said, it makes no difference once it's initialised. I walk down to the flight line swinging mine forwards and backwards and side to side on purpose to check its all going the right way before I fly it (very important preflight check )

[SGD]

When I first converted a model to FBL I asked a similar question regarding how level the heli should be on power up thinking the closer to perfectly level the better but that turned out not to be the case. I was told that you could lay the heli on it's side and switch it on and as long as it didn't move while it was initialising it was good to go.
I had my doubts about it but still gave it a go on a 600n and it worked fine.
My 450 does more of a 3D workout when I'm struggling to get the ill fitting canopy on after initialisation than it does when I'm flying it!

[ghost2212]

When I first converted a model to FBL I asked a similar question regarding how level the heli should be on power up thinking the closer to perfectly level the better but that turned out not to be the case. I was told that you could lay the heli on it's side and switch it on and as long as it didn't move while it was initialising it was good to go.
I had my doubts about it but still gave it a go on a 600n and it worked fine.
My 450 does more of a 3D workout when I'm struggling to get the ill fitting canopy on after initialisation than it does when I'm flying it!

Most normal FBL Gyro's will only measure Angular rotation, They have no idea which way is up. Issues can arise if movement is happening during initialisation as then the 0 degree rotation could be set with some rotation happening. This can cause Drift and possibility a tip over as you try to take off.

[wheredidthetailgo]

Thank you all, I do feel more comfortable trying this as it is easier in the pits given a tight canopy.

What I was told is that the SAS remembers the last correction it was trying to make and as such keeps trying to make it until it detects the correction worked. Hence the assumption that if I swing the heli left before take off it will still be trying to correct right through that critical second into flight which could cause tip over. It would be interesting to know how how people take off after swinging it around first a) nice and gentle or b) pop it up to a couple of meters as quick as possible. I would guess nice and slow is more prone the issues whereas popping it up gets it clear and gives the SAS a a little room to sort itself out.

FYI, I am learning to fly in a scale manner so the goal is to learn the slow controlled take off pattern of a real heli.

[Planehazza]

As long as the swash has returned to level centre as you spool up you'll be fine.

[pgkevet]

somewhere it states that in high winds it's better to initialise with heli on it's side to avoid buffeting during that phase. With y beastx helis I normally am making tiny corrections during take-off and don't expect problems..any more than i expect problem while the blades are shaking themselves out and the thing is vibrating on the first flight.

[Mutley2]

confused by 'the walk' . I now always power up like you and have no problems at all .
How do find your efl generally? I know the 3gx has been much debated and slated but I am very pleased , although I have never flown another fbl unit

Cheers

I've read this before and that's why I dumped the 3GX that came with my 550DFC, part ex'ed it back to the shop and had a BeastX. Power it up on the flight line and do what you want, does not effect the unit, BeastX is a very user friendly unit IOM.

[cjcj1949]

It's a similar problem to using hold mode in gyros. Carrying a live heli to the flight line is not the safest thing to do, unless there is some restraint fitted to prevent the rotor moving. Checking fail safe is important as well. I don't think there's a standard way that all fbl systems work, just as different gyros behave differently. Changes in external temperature and internal temperature due to heating can make a difference and each unit will have different sensors. Lots of factors come into this, but if your system works for your model that's about as general as you can get.

[wheredidthetailgo]

Seems I need to just try it and see, just want to avoid replacing yet more blades and bits (the last tip over took out blades, main gear and the motor which hurt the wallet somewhat ).

Thank you

[RcRotaryMadness]

I power up at bench.. carry heli out... put it down... check controls... visually look at the swash to make sure it's looking reasonably level (usually is!) - if not i will adjust it with the stick.. then spool up and off we go for happy times lol