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#71
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GPS and old-fashioned thinking?
Scott Moore wrote:
Roy Smith wrote On 12/05/05 07:01,: G Farris wrote: The Europeans are ready to use every available argument (the threat of the US unilaterally invoking Selective Availability being their favorite) to denigrate GPS, so as to pave the way for their competing system, Galileo. I can't blame them. If I lived outside the US, I would be pretty wary about depending on a navigation system which I had no control over. It's the same battle that happening now with control of the Internet. The "battle for control of the Internet" is far more about China wanting to censor it than any freedom issue. Maybe. I know in 1991 there was a large effort to build a "Chinese internet" that would use ONLY Chinese. There was a company (StepTech, IIRC) that was building "Chinese UNIX" for use in the large program. I think it is a bit strange: the want an "internet" so they can be a world player, but they want the world to switch to Chinese to talk to them. I haven't heard from those guys in quite a while. |
#72
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GPS and old-fashioned thinking?
Scott Moore wrote:
john smith wrote On 12/03/05 11:52,: LASER ring gyros are certainly small enough, I don't know how much they cost. If the US military can put them in artillery shells, they should be available for light GA inertial nav systems. Try looking up the price of a 3 axis FOG (Fibre Optic Gyro, the cheapest type of laser gyro). Hint: the US military has a lot of money. Funny. I remember a lot of talk about fiber optic gyros back in the mid-1960. They still haven't made in roads as predicted. |
#73
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GPS and old-fashioned thinking?
Roy Smith wrote:
G Farris wrote: The Europeans are ready to use every available argument (the threat of the US unilaterally invoking Selective Availability being their favorite) to denigrate GPS, so as to pave the way for their competing system, Galileo. I can't blame them. If I lived outside the US, I would be pretty wary about depending on a navigation system which I had no control over. It's the same battle that happening now with control of the Internet. Yes, we definitely need to find a way to charge users who aren't taxpaying US citizens! Matt |
#74
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GPS and old-fashioned thinking?
Doug wrote:
I can't find the link right now, but there is an all electronic (no spinning gyro) attitude instrument available for experimental aircraft in the $1200 range. Essentially replaces an AI or TC. Has a yaw indicator and lots of other functionality. It is square but fits in a round hole (no one makes round led screeens). Non - TSO of course. Not sure of the exact technology behind it, but it works and is not any more expensive than a traditional all electric AI. I think this is the one you're referring to. http://www.pcflightsystems.com More features (and $$). http://www.bluemountainavionics.com |
#75
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GPS and old-fashioned thinking?
DME/DME is simply not in that picure.
You give me hope! I hate this JAA politics BS... -- Thomas Borchert (EDDH) |
#76
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GPS and old-fashioned thinking?
MC wrote On 12/05/05 15:46,:
Doug wrote: I can't find the link right now, but there is an all electronic (no spinning gyro) attitude instrument available for experimental aircraft in the $1200 range. Essentially replaces an AI or TC. Has a yaw indicator and lots of other functionality. It is square but fits in a round hole (no one makes round led screeens). Non - TSO of course. Not sure of the exact technology behind it, but it works and is not any more expensive than a traditional all electric AI. I think this is the one you're referring to. http://www.pcflightsystems.com More features (and $$). http://www.bluemountainavionics.com Both rate of turn accelerometer based. |
#77
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GPS and old-fashioned thinking?
G Farris wrote:
The missed approach is part of the procedure, and if you've done good you have it all dialled-in, briefed and ready to fly. LOC22 at KCDW requires the localizer for the missed. The NDB-A (which has a GPS overlay now) also uses the same NDB in the missed approach procedure. Not all approaches provide a decent transition to a missed approach in the case of a failure of the primary NAVAID. I find that astonishing. - Andrew |
#78
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GPS and old-fashioned thinking?
I disagree. I think there is a more important problem. If you're flying direct
routes and RNAV with GPS as primary(and only random route) source of navigation, in the event of a GPS signal degradation, you have a bit of a balancing act to do to get back to "legacy" navigation. Maybe you do. I don't. I have a LORAN in the panel. Entirely adequate backup for anything short of a GPS approach - and non-GPS approaches are generally single-navaid dependent and not backed up, so no step backward here. In general, when I'm going direct to a waypoint, my LORAN and GPS both point to it. Either one can fail and it's no skin off my nose. I am not a fan of the whole intergrated-system concept. I like the idea of separate boxes, different software, and different signals. The perfect redundant RNAV solution is already here. It's an M3 IFR GPS and an M1 LORAN. Same UI, same form factor, great redundancy. I believe you can buy all the parts for less than $3000. Add a VOR/LOC receiver with GS, and you really don't need anything else for effective navigation and redundancy. Michael |
#79
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GPS and old-fashioned thinking?
Not all approaches provide a decent transition
Do you mean a "decent" or "descent" transition? What would you consider an "indecent" transition? |
#80
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GPS and old-fashioned thinking?
john smith wrote:
Not all approaches provide a decent transition Do you mean a "decent" or "descent" transition? What would you consider an "indecent" transition? Grin What I suppose I could have written in place of "decent" would be "any". But, in fact, the area has good RADAR coverage. So there is at least that as a backup in the case of a NAVAID failure. - Andrew |
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