Ronmarks,What aircraft are you flying? If flying with one equipped with an HSI, you just flip it 180 degrees from the normal localiser course and it will show 'correct' course deviation indications when flying the back course. This is how it would operate in the real world as well.When using the ol' OBS circle gauges in the default 172, I get correct reverse indications when flying a BC in FSX.

Sorry for the prev blank post. ??? can't delete itI think the statement " If flying with one equipped with an HSI,you just flip it 180 degrees from the normal localiser course and it will show 'correct' course deviation indications when flying the backcourse. This is how it would operate in the real world as well." is not correct.In the real world, with an HSI, if you set the course to FRONT course and fly the BACK course all will be well - direction sensing will be normal - not backward.If you set the course to 180 deg from normal front course direction( that is: consistent with the back course). using an HSI, the sensing will be backward. If the sim is different than this, the problem of auto-switching I mentioned is present.

Microwave Landing System? :(

Microwave Landing System? :(

What about it?

What about it?

I've just never heard of it lol

I've just never heard of it lol

Oh, yeah. They're an interesting read. I found it interesting the UK was building them even today. I had been under the assumption for the last few years (incorrect, maybe) that they were used by the military because of their mobility.

Oh, yeah. They're an interesting read. I found it interesting the UK was building them even today. I had been under the assumption for the last few years (incorrect, maybe) that they were used by the military because of their mobility.

Speaking about that, what do our boys over at the Military do in Harsh weather? I would believe that most of their landings are visual?

Sorry for the prev blank post. ??? can't delete itI think the statement " If flying with one equipped with an HSI,you just flip it 180 degrees from the normal localiser course and it will show 'correct' course deviation indications when flying the backcourse. This is how it would operate in the real world as well." is not correct.In the real world, with an HSI, if you set the course to FRONT course and fly the BACK course all will be well - direction sensing will be normal - not backward.If you set the course to 180 deg from normal front course direction( that is: consistent with the back course). using an HSI, the sensing will be backward. If the sim is different than this, the problem of auto-switching I mentioned is present.

Correct, Ron.The HSI will turn with the heading, which is why positive sensing is achieved if the couse is set to the front course.Bruce

MLS is quite the piece of kit. It's too bad the ILS has made it more of a history lesson nowadays. As for the military, most aircraft use GPS or ILS, unless they're really old. Then they'll use GCA (Ground Controlled Approach) / PAR (Precision Approach Radar). GCA/PAR is basically the same idea as an ILS, but a controller talks you down the glidepath and localizer.

If you want a handful of an approach, shoot the LOC/DME Backcourse into 29R at KTUS. Start at SULLI doing the DME arc. Good luck hitting the step downs at the correct altitudes.It's a very busy approach.

Sorry for the prev blank post. ??? can't delete itI think the statement " If flying with one equipped with an HSI,you just flip it 180 degrees from the normal localiser course and it will show 'correct' course deviation indications when flying the backcourse. This is how it would operate in the real world as well." is not correct.In the real world, with an HSI, if you set the course to FRONT course and fly the BACK course all will be well - direction sensing will be normal - not backward.If you set the course to 180 deg from normal front course direction( that is: consistent with the back course). using an HSI, the sensing will be backward. If the sim is different than this, the problem of auto-switching I mentioned is present.

Ahh yes. All correct. My bad. Completely make sense on your end. Try to follow my brain thoughts...haha:You're flying the back course, with the HSI set to front course...of course the HSI course is pointing to your aft...front course deviations are reversed as you are flying the back course...but the HSI has flipped it 180 degrees...hence you see 'correct' course deviations flying the back course.I was trying to say what you explained...using the correct front/back course terminology might have helped...haha

If you want a handful of an approach, shoot the LOC/DME Backcourse into 29R at KTUS. Start at SULLI doing the DME arc. Good luck hitting the step downs at the correct altitudes.It's a very busy approach.

This is the one I always use for testing... NGX in VNAV path and the IAN GP mode makes it really easy to hit the altitudes though.