insta-trim

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Feature request:

This is a function where the actual position of the sticks (all except the 
throttle stick) is added to the in flight trim values at the push of a button 
(or the momentary switch). When the sticks return to their 0 position, the new 
inflight trim is activated. Of coarse, the inflight trim buttons should remain 
working.

I envision a setting in the model menu, where you can turn it OFF or assign a 
switch (i.e. TRN), allthough I would modify my TX to have a switch at a logical 
place (bottom of case).

Why ?
I am in the process of converting all my models to the 9x, and all models start 
with a blank trim (can't copy it from my old TX). Some "maiden" flights where 
nerve wrecking to get the trim adjusted, especially in windy conditions. In 
these cases I would use the insta-trim function to get the coarse settings, and 
fine trim with the trim buttons.

After the first flight, I would disable the insta-trim function, to avoid 
problems when accidentally pressing the button during a snap roll....

Default at power up, the inflight trim should default to off.

Original issue reported on code.google.com by harm.del...@echostar.com on 12 Oct 2010 at 6:49

[GoogleCodeExporter]

How would be this algorithm:
If the Stick is at its zero Position, then the trim switches work normal.
If a stick is not at zero then the trim switches can trigger your described 
behavior.
trigger could be 
- a single trim puls
- a long trim pulse (in the desired direction?) (i think i prefer this)
- a sequence of one plus and one minus
instant trim is then added when the according stick returns to zero.

Disadvantage to your proposal: -You need one keypress for each stick-direction
                               -Detection of the zero position is a little bit fuzzy

Advantage:                     -The keys are more related to the feature,
                               -You can selectively use the feature
                               Possibly we dont need to switch on-off this feature? 

Original comment by th...@t-online.de on 19 Oct 2010 at 6:02

• Added labels: Type-Enhancement
• Removed labels: Type-Defect

[GoogleCodeExporter]

Your proposale does not meet the envisioned result. The proposal was to have a 
single key press result in inflight trim correction for all 3 axis. This should 
be happening at a moment where you hold the model in a straight flight with the 
sticks. Therefore you cannot use trim keys to do this, since these are 
(ergonomic design ?) only accessed when you take your thumbs off the sticks. So 
you must use the other switches (or a custom "bottom" switch).

You need (even in your proposal) a way to turn it off. Too risky, since you 
potentially offset all trims, and potentially with large values. 

I do understand your concern about detecting the zero position. Maybe a long 
switch activation reads the sticks, and a short press activates the new trim 
settings.
Or maybe even simpler: a press reads, and immediatly applies the new settings. 
Somewhere in time you (pilot) have to handle the trim change, and why not 
immediatly, while you are busy correcting the flight behaviour.

Proposal: 
Assign a single switch (menu item: INSTATRIM OFF/TRN/AIL/ etc..)
When activated, immediatly read 3 axis sticks and "add" to inflight trim. 

I am not sure whether "add" or "replace" is best for the inflight trim.

Original comment by harm.del...@echostar.com on 20 Oct 2010 at 9:00

[GoogleCodeExporter]

Original comment by th...@t-online.de on 7 Sep 2011 at 11:04

• Changed state: Done