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Author
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Topic: ILS System help wanted OPS/Math gurus please help
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Nat
JAG
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posted 05-27- 08:23 PM
   
Hey Guys, ok I was asked about this sometime back, and I've not forgotten about it Snick  How could I, it's a challange that I'm sure can be beaten, but I'm not sure of the math to make it work..OK, here's the idea we have:
qryRadio Heading: Bearing to nearest control tower in degrees (0 – 360). and qryAFNDist: Distance to nearest control tower in miles. So, the idea is this: 2 bars crossed, one horizontal, one vertical. The Vertical bar qrys the hearding and moves on a Translate DOF to the left and right to guide you to the field. The Horizontal bar qrys the distance, starts at the top of the dial, and moves downwards on a Translation DOF as the distance is decreased to the field. So, the bearing shouldn't be so hard to do, just a simple dial realy, but whats needed is the best way to move the distance DOF, I need a calcultaion for this, so that say the bar starts moving downwards when your 5 miles from the field, at stops at the centre of the dial. The hard part (and why I'm asking for help) is to make the horizontal bar move in a realistic mannor to produce a flight path. I don't think it's that hard, but I can't quiet get my head around it, you know like when it's right at the front of your brain but you can't quiet get it.. yes, damn annoying.. If you have any thoughts on the best way to accomplish this then me and Snick will be rather pleased Thanks for any ideas guys (why do I think Werner will have a good answer.. lol) Cheers! ~Nat~ IP: Logged |
Royohboy
Pilot
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posted 05-29- 05:27 PM
Hi Nat!Cool idea. Ihate to be the bearer of bad news, but this is not the way an ILS works. An ILS indicates if you are aligned with the appropriate runway, and I guess this is about impossible with our current SDOE.
The second thing is that the horizontal bar indicates if you are on, above, or below the appropriate glide slope. This is, I guess, impossible as well. Peter IP: Logged |
Nat
JAG
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posted 05-29- 06:13 PM
I fully agree Roy, there's no way to add a true ILS system, but I thnk (totaly unsure) the the early versions that were fitted to aircraft like the PBY only had a system similar to what I made out above, and in anycase, for those that had ILS this system would be better than none at all, you could achieve a form of ILS even if not fully correct. It would be cool to build it I reckon, just a bit fiddly lolIP: Logged |
Snickers
Pilot
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posted 11-26- 07:35 PM
Sorry to ressurect this from the ded but...
I was talking with some PBY pilots and they mentioned they had a truck with special equipment they had to setup to do ILS. What if we take an existing truck, place it at the end of the runway. When you are homeward bound, do Alt T until it is the target. NOW you have something that provides you with distance to the end of the runway you are shooting for. Can you tie this in with the other considerations and come up with the rudimentary ILS? If you are set up left to right, the truck could provide you the slope...
IP: Logged |
jedi
Pilot
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posted 12-13- 11:11 AM
Hmmm. Well, if you're talking about using a bar to show how far you are from something, then there's no way to make it work like an ILS. The ILS "looks right" when the bars make a little "+" and in order to do that, you'd have to be maintaining a constant distance, i.e. flying in a big circle around the field Only then the vertical bar wouldn't be in the middle  What you probably could do is make a "DME" (distance measuring equipment) guage. Make a guage kind of like the compass, with mileage from about 30 on down. Using the qryDist, you should be able to make the guage decrease down to zero as you approach the radio beacon. This would allow you to design an "NDB-DME" approach if you wanted, which would be about as sophisticated as it got in WW2 I would think.
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--jedi-- IP: Logged | |
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