BeechTalk - BT - Jets with normal cruise of 0.7 mach or better?

Username Protected · **Posted:** 13 Oct 2022, 22:23

Username Protected wrote:

Swearingen SJ30, Mach 0.83. I truly believe that's the fastest aircraft that meets these criteria for the US:

Single pilot
Civilian
Standard airworthiness certificate

A unique airplane, like a unicorn. Would love to have one when it works, would hate to have one when it doesn't. I wish they made 2000 of them and not just 8 (and I'm not sure all 8 are presently airworthy).

Quote:

Interesting note - it has 12 psi pressurization, for an 1,800 ft cabin at FL490.

That would be 5500 ft cabin altitude in outer space.

My Citation V is 8.9 PSI. When I am flying at FL450, 85% of the atmosphere is below me. I'm basically a spaceship at that point.

Mike C.

Username Protected · **Posted:** 13 Oct 2022, 23:30

Username Protected wrote:

I will take my pokey Citation Mustang any day... the faster jets will pass everything but a fuel truck.

On a 120 knot headwind day, though, a trip can get quite long at Mustang speeds.

Mike C.

Username Protected · **Posted:** 14 Oct 2022, 01:09

Username Protected wrote:

A 120 knot headwind non stop DFW NRT (Tokyo) makes a B777 .85M quite long.

The Mustang can do DFW to NRT, but it will take a week and maybe 8 to 10 legs.

Mike C.

Username Protected · **Posted:** 14 Oct 2022, 05:37

Username Protected wrote:

When I am flying at FL450, 85% of the atmosphere is below me. I'm basically a spaceship at that point

Well I guess all spaceships pass FL450 at least once…

Andrew.

Username Protected · **Posted:** 14 Oct 2022, 08:47

Hope you are wearing that mask at all times single pilot ;-)

Username Protected · **Posted:** 14 Oct 2022, 09:58

Username Protected wrote:

Hope you are wearing that mask at all times single pilot ;-)

Of course, don't we all?

Mike C.

Username Protected · **Posted:** 14 Oct 2022, 10:36

Mike, unfortunately the real world doesn't mirror your idealistic view. However, the recent Citation crash into the Baltic may encourage pilots to be more cautious. For a while, at least.

Username Protected · **Posted:** 14 Oct 2022, 11:23

Username Protected wrote:

Mike, unfortunately the real world doesn't mirror your idealistic view.

Not sure what you are referring to.

Treating my plane like a spaceship seems like the opposite of being idealistic.

Mike C.

Username Protected · **Posted:** 14 Oct 2022, 11:37

Username Protected wrote:

Mike, unfortunately the real world doesn't mirror your idealistic view.

Not sure what you are referring to.

Treating my plane like a spaceship seems like the opposite of being idealistic.

Mike C.

Username Protected · **Posted:** 14 Oct 2022, 12:03

If it’s anything like the Phenom it would be after every 2 hour flight.

Chip-

Username Protected · **Posted:** 14 Oct 2022, 12:07

Username Protected wrote:

I was referring to your belief that all pilots wear their masks. Maybe you meant for it to be in green?

Second most violated rule in aviation. First is 91.103 which no ones adheres to completely.

Rare to find anyone wearing their oxygen masks per the rule.

Quote:

I'm curious about one thing. In the V when you are "wearing and using" the oxygen mask, is oxygen flowing or does it have an automatic valve that starts the flow when the cabin altitude exceeds 14,000 feet? If not the latter, then how often do you have to refill the tanks?

I had the same question. The masks are "oxygen diluter" types, so I thought they'd simply pass ambient cabin air when below, say, 14,000 ft, thus would cause no oxygen usage until the cabin depressurizes.

Turns out that is wrong, if you inhale you get oxygen, regardless of cabin altitude. So wearing the mask always consumes oxygen which means refilling at the destination.

At cabin altitude of 8000 ft, using pilot mask, I have 17 hours capacity. The dispatch green arc is rather small, 1600 to 1800 PSI, so even if I have most of it left, I have to refill the bottle before further flight.

Mike C.

Username Protected · **Posted:** 14 Oct 2022, 12:29

Username Protected wrote:

Second most violated rule in aviation. First is 91.103 which no ones adheres to completely.

And the third most violated rule is not using green font on Beechtalk when you are being facetious. Yes, I'm guilty of that one...

Username Protected · **Posted:** 14 Oct 2022, 17:55

I suspect a contract pilot would not be getting many gigs if they slurp the O2 bottle to minimums on every other flight.

Username Protected · **Posted:** 15 Oct 2022, 03:35

Username Protected wrote:

Hope you are wearing that mask at all times single pilot ;-)

About the only advantage in aviation in Australia, we don’t have that rule.

Andrew

Username Protected · **Posted:** 15 Oct 2022, 11:32

Username Protected wrote:

About the only advantage in aviation in Australia, we don’t have that rule.

For the usually far more strict Aussies, this is an indication the rule is outdated.

I don't believe the Aussies have more accidents related to this rule, either.

The FAA, in 2020, recently relaxed the rule for part 121. Two pilots, no one on oxygen at any altitude, one pilot in cockpit, only at FL410 and above. Used to be FL250.

https://www.federalregister.gov/documen ... ine-engine

A part 91 operator petitioned for 91.211 relief for their Gulfstreams:

https://downloads.regulations.gov/FAA-2 ... ment_1.pdf

Not clear what happened. They did put forth the automatic emergency descent mode, which would be nice to have. This descends the plane to 15,000 ft automatically on loss of cabin pressure. May not be a good idea in Nepal, but generally useful otherwise.

Mike C.