Raptor 50 Tail servo config

[Dedcalm]

I am running a Futaba 401 with a 9254 digital servo on my new Raptor 50. I have found that the ATV on my FF9 has to be configured to about 50% each way with the 401 in line for the servo to travel with the stick. If I have it at more than this there is a point at which the stick can still move away from centre without the servo moving. The servo is not binding and if the 401 is removed with the servo connected directly to the Rx all is ok.

Any ideas if this is normal ? Is there a cure or should I leave the ATV for Channel 4 at 50%

Rob

[Raptorite]

Hi Rob,

The ATV settings on channel 4 are only used to control the pirouette rate, for reasonably fast 3d you need them to be about 120% both sides.

As Im sure you are aware the gain is set by either using channel 5 ATV's or by using the gyro function if you have something like a futaba 9C transmitter.

The servo end points are adjusted by the pot marked as LIMIT on the gyro itself. To set this move the stick to the left or right and then adjust the limit pot until the linkage is at the end of its travel. Once you have done the first side, its just a matter of checking that the opposite side is the same, if the linkage and servo arm etc. are all central in the neutral position, both sides should be the same.

Cheers,

Pete.

[Dedcalm]

I understand what you are saying but even with the Gyro in normal mode (non HH) and with the ATV on channel 4 at 100% (how it was when I first set it up) I get a weird situation where the servo moves to the max throw position (max pitch on the tail) with the Tx stick at only about 50% of its travel so there is a large "dead" area on the Tx which is unnerving.

I certainly dont fancy trying to fly it like this. By reducing the ATV on channel 4 I now have 100% stick movement to 100% rudder pitch movement but as you say the piroette rate is lower.

I am totally unclear how I can get a fast piroette rate with 100% stick movement to 100% tail pitch with the 401. I do not have this sort of problem with my CSM400 but this suffers from drift instead

Really want to fly the beast but still tearing my hair out over this :cry:

[helidad]

Hi Dedcalm
use the limit screw on the 401 to stop binding, not the ATVs
the ATVs adjust the pirouette speed you want, just as Raptorite says.

50% on ATV will give you very slow turns and slop in the center
if you want faster speed try moving the link ball out one hole or more on the servo horn

Cheers

[Dedcalm]

I am not getting binding as I have set the limit using the pot on the 401. I guess I have a wierd problem... will have a tinker this evening unless anyone can come up with any more ideas on how to solve my problem.

[Dedcalm]

Took another look at this last night and have set the ATV on Ch4 to 100% Tail movement is smooth and not binding but there is still a point where the tail is at its max pitch but the Tx stick still has some more movement.

I guess I will fly it and see how it goes as I cant see any way to remove this "dead" area on the stick. It must be something that the 401 is doing as the stick to tail movement is perfect with the 401 removed.

Rob

[helidad]

Hi Dedcalm

Just a thought, do you have a lot of Exponential dialled into your Transmitter? , Also check the delay pot on the 401---set to "0.

Ok, to get the full stick movement play with the Limit pot screw on the 401

I just checked the rudder servo horns on my Raptors the link ball is around 12mm{.0470 inch} from the centre, I also have 120% on the limit pot.

Buddy, you have the best Gyro around in the 401, no drift at all with these little gadgets, I have 5 of the same and 2- 601s, the 601s are excellent also, and the added bonus -- they say Hello to you when you turn them on {thats better than what my wife does, Hmmm, but thats another story}

The only time the Heli will turn is when you put in the stick command.

Good flying

Cheers

[Dedcalm]

Nope dont have any exponential on any of the channels, also have the limit pot set to give max pitch change without binding so nothing to change here.

Flew it this morning to get the maiden out of the way and all seems fine. Very pleased with the OS50 Hyper, seems powerfull even while running in. The Magnum 12% fuel seems to be very agreeable to the engine as well as being nice and clean.

The tail is really locked in in HH mode (currently 80%) and no drift certainly think that the 401 is better than the CSM400 that I also have.

Thanks for the advice guys

[Stuart]

Rob,

Glad to here you got sorted I've only ever had two gyro's the std piezo rated non HH and the GY401....never looked back every heli I've had from a Raptor 30 to a Fury Extreme and now my Milli live off 401's.

Its gotta be the best spent ever...