Just one unit per FMS?

How do they deal with the information skew introduced by channel hoping?

They must be fairly sloppy in terms of performance, particularly during a turn.

Mike C.

For most of us measly GA pilots. as long as it can get you through a GPS outage en route, probably fine.

Or transition to a segment on a radio based approach

I was thinking more about just covering your GPS antennas with some copper mesh or aluminum foil...Not 3 letter agency attention getting solutions.

Chip-

One, that doesn't allow me to change the GPS functional state inside the cockpit in flight.

Two, that will disable ADS-B reporting which is a violation of 91.225, thus attracting the attention of a 3 letter agency.

Three, my RVSM approval is based on section 9 (using ADS-B for verification) and thus I need that to fly in RVAM airspace.

Four, at my speeds, could have those foil tapes come off and end up in a bad place.

Five, if the foil sticks well, may cause paint or other damage to remove.

The only legal method I know of is to deliberately fly into a GPS denied area. Even that's hard to do since they don't always jam during the NOTAM period, and even if they jam, that doesn't always take out a high flying airplane some distance from the jammer. Usually, the jammer is inside a restricted area so I can't get too close to it.

I have no experience with my plane in a GPS denied state of operation, nor any reasonable way to cause that. I am curious what it will do under those conditions.

Mike C.

FL 290 and 300. Thursday 2/23/23. I'm not very good with ADSBexchange, and I block my number. Someone good at ADSBexcange, please feel free to post the flight.

So the tops of the weather was 19,000 ft? In the Rocky mountains?

That's not much of a storm.

Man, that would be nice if that was common around here!

Mike C.

FL 290 and 300. Thursday 2/23/23. I'm not very good with ADSBexchange, and I block my number. Someone good at ADSBexcange, please feel free to post the flight.

Fly in formation as wingman - this negates the need for ADSB output.

(No I’m not seriously advocating this for testing how your plane works when being denied GPS but it is a legal way to fly without ADSB!).

Robert

At 30k in my meridian, and power pulled back, I get around 233 knots on 26 gallons an hour. Not too shabby. Only problem is the cabin altitude is above 11k, and 4 hours gets pretty exhausting at that altitude.

One,
Two,
Three,
Four,
Five,
Mike C.

That's not a good enough test, IMO.

The system can behave differently in the air without GPS.

Also, this test is easy to do inside a hangar (without a GPS repeater). When I have done that, I get a TAWS warning (since it relies on GPS) but not much else goes wrong. But then I'm not flying or navigating anywhere.

Mike C.

Put your O2 mask on or better take a portable O2 bottle with you and cannula…. You’ll feel better and have $ in your pocket by skipping a fuel stop….

I just keep checking this thread to see if y'all are suggesting a Gulfstream yet.

Hangen and Pearman are too expensive in the cockpit of a Gulfstream, Don…

Reaching 350 knots GS at times. Definitely wind aided. A sounding at KGJT a few hours later was 240 at 107 knots at 30,000 ft. Whee!

Going the other way, the GS would be poor, well under 200 knots, and it would be a long suffering day. Even down to FL200 winds were 80 knots against and you would not want to go lower over the Rockies due to rotors and turbulence.

I've done 1600 nm westbound to Seattle in the MU2 with 100 knot headwinds and its annoying to say the least. You buy a fast airplane not for the tailwind days, but for the headwind ones.

Spending close to 5 hours will test biological endurance. I don't think Meridian comes with "facilities" for that generally. For a family trip, that's a factor which will limit range more than fuel, which won't be full with that cabin load anyway.

At FL300, the cabin altitude will be above 10,000 ft, which can be tiring for 5 hours.

For a 501, you pay less for the airplane, pay more for fuel, but the experience is radically different. Much faster, cabin altitude below 8000 ft, facilities, more payload, etc.

Mike C.