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FlyAgi Tweak Utility 1.10j - Force trim for helicopters

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Agi
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Registriert: Sa 29. Apr 2017, 01:42

FlyAgi Tweak Utility 1.10j - Force trim for helicopters

Beitrag von Agi » Mi 24. Apr 2019, 15:39

I added force trim functionality for helicopter pilots - this allows to add force trim to any helicopter. There is also a calibration tool in the controller options, I strongly recommend to make use of it if force trim does not hold your current attitude as expected.

To set up your helo for force trim do the following:
  1. Assign at least one command 'FlyAgi Tweak Utility/Force Trim' to a key or button of your choice. Pushing this button engages the force trim logic, pushing once again switches it of
  2. I recommend to assign the second command 'Force Trim Release' as well - this one just disengages the force trim logic and resets your trim values to center
  3. Now start a flight in a helicopter, get some altitude and speed and then push and hold the force trim button. While holding the button center your joystick and release the button afterwards - the helicopter should now hold its attitude more or less accurately.
  4. If the accuracy of the trim is not good enough go to the controller menu and calibrate the values slightly. If, for example, your nose drops with the force trim use the pitch calibration and decrease the value by one or two steps and check again. Repeat this until you're satisfied with the results
  5. The calibration is needed because the trim effectivity is different for most helos so there is no single setup working fine with all of them



Changes:
  • Added Force Trim logic
  • Added commands for 'force trim' and 'force trim release'
  • Added force trim calibration buttons to controller menu
  • Added force trim mode button to controller menu, supported modes are 'Pitch + Roll' and 'Pitch + Roll + Yaw'
  • Minor stuff


FlyAgi Tweak Utility Download

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Mr.Mo
Beiträge: 23
Registriert: Di 5. Jun 2018, 16:45

Re: FlyAgi Tweak Utility 1.10j - Force trim for helicopters

Beitrag von Mr.Mo » Mi 24. Apr 2019, 17:21

Danke Agi!

Da hab ich ja mal was schönes zum Ausprobieren. ;)

Gruß,
Mo

kabouter_plons
Beiträge: 3
Registriert: So 8. Dez 2019, 18:00

Re: FlyAgi Tweak Utility 1.10j - Force trim for helicopters

Beitrag von kabouter_plons » So 15. Dez 2019, 15:58

Hello FlyAgi,

What a great tool with really super functions! This is exactly what I was looking for. I am a helicopter pilot and I think it is a great initiative that you have created a force-trim function for each heli. He works with me, however, with only one heli, the H145 T2, and that works great. However, I cannot get it working with the Bell 429 and Bell 407 (V3.1 dreamfoil) and others. Do you have any idea what I could do wrong. I like to fly with the Bell helicopters.
I think I followed the installation instructions exactly.

For your information, I use X-Plane 11.40

I really hope you can help me.

Thanks in advance,
Fer

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Agi
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Re: FlyAgi Tweak Utility 1.10j - Force trim for helicopters

Beitrag von Agi » So 15. Dez 2019, 16:11

Hi Fer.

The Dreamfoil helicopters have their own force trim build in which should work the same way as the FTU force trim does - so I think they are possibly blocking the DataRefs needed so other plugins can't make use of them.

Anyway, as they should have this build in (at least the 407 has this feature) I recommend to use their own force trim. You just have to assign the needed commands 'force trim' and 'force trim release' provided by the helicopters instead of those provided by FTU.

:-)

Regards,

Agi

kabouter_plons
Beiträge: 3
Registriert: So 8. Dez 2019, 18:00

Re: FlyAgi Tweak Utility 1.10j - Force trim for helicopters

Beitrag von kabouter_plons » So 15. Dez 2019, 17:25

Thanks for your quick response. The built-in force trim of the 407 does indeed work and I use it. But with the B-429 (freeware), R22 and the Sikorsky, I have been trying all day yesterday and today but it doesn't work which I find very unfortunate. Strangely enough, it works well with the H145 T2.

Gr.
Fer

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Agi
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Re: FlyAgi Tweak Utility 1.10j - Force trim for helicopters

Beitrag von Agi » So 15. Dez 2019, 19:22

What does 'it does not work' mean? Technically it should work as long as trim is not blocked by an plugin but of course you have to calibrate the trim effectiveness in FTU to the actual helicopter (the default values have been adjusted to the DMO Sikorsky S-92 in XP 11.2x or 11.3x).

kabouter_plons
Beiträge: 3
Registriert: So 8. Dez 2019, 18:00

Re: FlyAgi Tweak Utility 1.10j - Force trim for helicopters

Beitrag von kabouter_plons » Mo 16. Dez 2019, 19:39

It means that the Force Trim does not fix the cyclic position. As said, it works with the H145 T2 so my method seems correct. For clarity: I make sure that I fly stably and in the right direction, hold down the force trim button and release the cyclick. The heli immediately changes direction extremely. The pitch and roll trim are assigned to a Hat switch, but the heli does not respond to that at all. If I press on force trim release you will immediately see the H145 shoot out of its fix. This effect makes it clear to me that the force trim kept the control, but I don't see that effect with the other helis.

I have just flown with the sikorsky, but that really doesn't respond to anything either ... You indicate that the trim could be blocked by a plugin. You could be right about that. I use the AviTab, FlyWithLua, Simcoders-Headshake, and the dreamfoil Bell 407 plug-ins. Maybe you can do something with that?

tnx,
Fer

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Agi
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Re: FlyAgi Tweak Utility 1.10j - Force trim for helicopters

Beitrag von Agi » Di 17. Dez 2019, 02:08

Well... the force trim uses standard XP trim parameters to stabilize the aircraft - if for any reason some aircraft don't respond to trim values or a plugin coming with the aircraft blocks access to the corresponding DataRefs it will not work. Do your helicopters in question respond to aircraft-like roll or pitch trim? If they don not respond the force trim will not work because it uses the trim parameters to stabilize the helicopter.

If trim is not working you could try to change the force trim method option to cyclic instead of trim - then there is a completely different logic trying to really stabilize cyclic inputs without using trim parameters. This method was something I made at first and it works but it's a bit twitchy and not as comfortable as the trim method - maybe worth a try.

Which Sikorsky are you talking about btw? I tested with the XP S-76 and the DMO S-92 and with both helicopters the force trim worked fine but you have to adjust the calibration values in the force trim menu to get it working because the needed trim values are different for every aircraft.

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