[jhb] Re: CH Yoke Query
- From: "Paul Reynolds" <paul@xxxxxxxxxxxxxxxxxxx>
- To: <jhb@xxxxxxxxxxxxx>
- Date: Sun, 19 Jul 2009 01:18:53 +0100
Gerry,
Could it be the yoke's power supply showing the first signs of going down?
Especially if routing through a USB hub!
Paul
-----Original Message-----
From: jhb-bounce@xxxxxxxxxxxxx [mailto:jhb-bounce@xxxxxxxxxxxxx] On Behalf
Of Gerry Winskill
Sent: 18 July 2009 23:21
To: jhb@xxxxxxxxxxxxx
Subject: [jhb] Re: CH Yoke Query
Next step was to arrange a display of Aileron Trim Percent. That showed
the allocated keys having no effect. Reallocated to a yoke button and
that changed the applied trim values. Surprisingly aileron trim is
having no effect on the ailerons, even at values of 100%, in either
direction.
Gerry Winskill
Gerry Winskill wrote:
> It wants to roll to the right but can be held level by appication of a
> small, and constant, amount of left aileron. On autopilot it holds a
> steady heading, with the AI showing just a minute deviation to the
> right. The stick can be waggled, slightly, without a significant change.
> Initiated rolls are a bit quicker to the right than to the left.
>
> I checked fuel, because I've had similar effects, in the past, from
> unbalanced fuel. This time it happens with full tanks. The TB21GT and
> TB200GT both roll right despite just having a 170 lb (American?) pilot
> and no passenger. So, any swing should really be to the right.
>
> It's also present, in exactly the same way, if I fly the PC12. So, it's
> control, rather than aircraft, related?
>
> Although I can trim the wings level by applying left rudder trim, as
> expected, it then makes a slow flat turn to the left.
>
> I must take a close look at aileron trim. Although I've allocated a
> couple of keys to it they seem to be having no effect.
>
> Gerry Winskill
>
> Fossil wrote:
>> OK. With 25% you shouldn't have the stick/yoke affecting roll rates at
>> all.
>>
>> If you feel the aircraft rolling does any touch on the yoke affect the
>> roll
>> rate? If you can waggle the yoke slightly and see no change in aircraft
>> behaviour then it would suggest to null zone is working for the yoke.
>> If so
>> look at other input devices like the mouse or touchpad which can also
>> affect
>> handling.
>>
>> Also check for other obvious effects like a fuel misbalance. Running
>> tanks
>> down on one side can have a big effect on roll rates.
>>
>> bones
>> bones@xxxxxxx
>>
>>
>> -----Original Message-----
>> From: jhb-bounce@xxxxxxxxxxxxx [mailto:jhb-bounce@xxxxxxxxxxxxx] On
>> Behalf
>> Of Gerry Winskill
>> Sent: 18 July 2009 17:03
>> To: jhb@xxxxxxxxxxxxx
>> Subject: [jhb] Re: CH Yoke Query
>>
>> Not that. It was set at about 25%. I increased to 50% and that slowed
>> the start of the unwanted bank but didn't remove it.
>>
>> Gerry Winskill
>>
>> Fossil wrote:
>>> Have you set your null zone too tight?
>>>
>>> bones
>>> bones@xxxxxxx
>>>
>>> -----Original Message-----
>>> From: jhb-bounce@xxxxxxxxxxxxx [mailto:jhb-bounce@xxxxxxxxxxxxx] On
>>> Behalf
>>> Of Gerry Winskill
>>> Sent: 18 July 2009 08:58
>>> To: JHB Restricted
>>> Subject: [jhb] CH Yoke Query
>>>
>>> Another day and another problem! This time it's my CH USB Yoke.
>>>
>>> For about a week now I've found that leaving the yoke hands free
>>> results in the aircraft slowly banking and turning to the right. It
>>> happens with a variety of aircraft, so it's not aircraft.cfg induced.
>>>
>>> I've allocated a couple of keys to aileron trim but they have no effect.
>>>
>>> I've recalibrated several times. No effect.
>>>
>>> I've recalibrated, pressing a button to indicate the yoke is centred,
>>> whilst actually holding it in the approx position needed for level
>>> flight, in the current situation.
>>>
>>> I'm beginning to suspect the inabillity to trim, or calibrate, out
>>> points to the Yoke internals as the culprit.
>>>
>>> I seem to recall someone on the list trying to open up the yoke, with
>>> explosive results! So, the only idea I have is to try squirting
>>> electrical cleaner into it.
>>>
>>> Anyone any ideas please? I've had the yoke since the USB Yoke first
>>> came out, so perhaps it's just knackered!
>>>
>>> Gerry Winskill
>>>
>>>
>>>
>>
>>
>>
>
>
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