How do you release the Spi on the TM Hotas?

[Dudester22]

I am having problem with the Spi using the TM Hotas. I thought to release the Spi it was TMS long backwards, but this isn't releasing it for some reason. Am I right in thinking this is the correct way?

Edited August 7, 2014 by Dudester22

[cichlidfan]

I am having problem with the Spi using the TM Hotas. I thought to release the Spi it was Target long backwards, but this isn't releasing it for some reason. Am I right in thinking it is this because I'm trying to determine if it's my stick that's faulting?

 

What is 'Target Long Backwards'?

[AtaliaA1]

He means TMS long back. English is not his first language it appears.

[Rongor]

You don't release a SPI, but you can reset the delivering SOI to the active steerpoint or to boresight with the China hat switch.

[Dudester22]

You don't release a SPI, but you can reset the delivering SOI to the active steerpoint or to boresight with the China hat switch.

 

I know you can do that with the China Hat switch, but are you sure you cannot release a SPI? Normally when I have made something the SPI using TMS forward long, I am then able to release the SPI using TMS back long.

[kontiuka]

I know you can do that with the China Hat switch, but are you sure you cannot release a SPI? Normally when I have made something the SPI using TMS forward long, I am then able to release the SPI using TMS back long.

TMS back long sets the steerpoint as SPI. I don't think you can actually not have a SPI.

[Dudester22]

TMS back long sets the steerpoint as SPI. I don't think you can actually not have a SPI.

 

I see, I was meaning release it from the target I had made SPI though, like a tank for example. So it should at-least release it from the target then? For me that isn't happening, it's staying on the same target.

[kontiuka]

I see, I was meaning release it from the target I had made SPI though, like a tank for example. So it should at-least release it from the target then? For me that isn't happening, it's staying on the same target.

Actually, you're not making the target SPI, you're making where the TGP is looking SPI. A subtle but important difference. Anyways, yes TMS back long should make steerpoint SPI instead of the TGP.

 

Are you looking at the target through the TGP or through the Mav sight? That might be your problem. If the Mav is locked up, changing SPI won't automatically unlock the Mav.

[kontiuka]

If you are on your TGP, unless the TGP is slaved to the steerpoint, setting the steerpoint as SPI (TMS back long) won't unlock anything. Your TGP will continue to look at the same area or point. It's just that the TGP will no longer be SPI. Could that be what you are doing?

[jcbak]

China Hat AFT LONG will release the SPI from current target and return the SPI to the Steerpoint. Depending on the circumstances, it may be a good idea to create a MARKPOINT at the current target before you "release" it in the event you want to return to it. The last target fired upon will automatically generate a "Z" markpoint.

Edited August 7, 2014 by jcbak

[Rongor]

Actually, you're not making the target SPI, you're making where the SOI is looking SPI. A subtle but important difference. Anyways, yes TMS back long should make steerpoint SPI instead of the SOI.

 

Are you looking at the target through the TGP or through the Mav set as SOI? That might be your problem. If the Mav is locked up, changing SPI won't automatically unlock the Mav.

 

I recommend looking up pages 88 and 91 in the latest DCS A-10C flight manual.

[Mike5560]

One thing that couldve happened is you set your TGP as SPI and slewed it somewhere, a target for example. If you did a TMS right, either accidentally or not you just created a markpoint.

 

If your CDU is set to mark, then a TMS aft long will set your markpoint as SPI, which in this case, would be the same thing. Your markpoint and TGP are at the same location, so TMS aft long doesnt change the location, minus some inertial drift.

[Dudester22]

This gets so confusing when you are in the thick of it sometimes. I have printed out the pages from the manual and I'll see what happens. I do know it wasn't my TM Hotas faulting though, because I could see the TMS switch moving in the cockpit as I moved it on my Stick.

 

Thanks for the replies.

[PFunk1606688187]

For ultimately clarity, when you say "release" what do you mean?

 

Using the nomenclature in the manual, TMS Aft Long should "Reset SPI to Steerpoint".