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

Username Protected · **Posted:** 10 Oct 2022, 08:17

Challenger 300/350 cruises at .80M with an Mmo of .83M (usually done between FL410 and FL450). Company slows us down a smidge to .78 if we are just doing a repo flight w/o pax.

The airline version of the CRJ I used to fly normally cruises between .74 and .80M depending on loads, leg distance, ISA, etc.. We were also capped at FL370 by the company.

Neither of those fall into the cheap operational category... :tape:

Username Protected · **Posted:** 10 Oct 2022, 08:27

BAe-146-200: .70 Mmo

BAe-146-300: .73 Mmo
We affectionately called them the "4 engine road block".

CRJ-200: .85 Mmo
We un-affectionately called them the WSCOD (pronounced WIS-COD)
for "Whistling $hit Can Of Death".
You'd be lucky on a cold day at FL300 to get .80 because the leading edges looked like 40 grit sand paper.

Username Protected · **Posted:** 10 Oct 2022, 16:36

Citation CJ4 - we have to pull back even at FL450 not to exceed .77M. So we normally try to target .76M - fuel burn 1000lbs/hr
Citation X (with winglets) - pulling back not to exceed .92M until we hit FL 450 normally cruise between FL470 and FL490 where we plan on .88M to .89M ~1600lbs/hr

Username Protected · **Posted:** 10 Oct 2022, 17:16

Legacy 450/500 is advertised at .83M. Somedays it will do .83 but then Ms. Brazil starts yelling "HIGH SPEED" because .83 is in the barber pole. We always cruise at .82 with 10 bodies or none.

Username Protected · **Posted:** 10 Oct 2022, 18:04

The new Global 8000 will have an MMO of 0.94M. Probably cruise up to 0.92M or so burning lots of fuel no doubt.

Username Protected · **Posted:** 10 Oct 2022, 18:11

just ONCE in my life, I want ATC to ask me my mach number.

I am practiced and ready to go. That would be Mach point fooooouur four five... Would you like me to slow it down for ya?

.445 all day long at 30,000 feet. But then again only burning 240pph which equates to 8.4 statute miles per gallon. In the big SUV territory.

Attachment:

1 (56).jpeg

Username Protected · **Posted:** 10 Oct 2022, 18:42

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

Username Protected · **Posted:** 10 Oct 2022, 19:11

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:** 10 Oct 2022, 19:15

Lear35/36

Username Protected · **Posted:** 10 Oct 2022, 19:19

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:** 10 Oct 2022, 19:40

Username Protected wrote:

But then again only burning 240pph which equates to 8.4 statute miles per gallon. In the big SUV territory.

8.4- That's Prius like.
The Mustang here is around 5 MPG and burns Avgas. Pilot and Passenger only. Kinda loud too. Does put a big smile on your face.

Username Protected · **Posted:** 10 Oct 2022, 19:42

The turboprop that thinks it's a jet, the Piaggio Avanti, has a book Mmo of 0.70. Just sayin'.

Username Protected · **Posted:** 10 Oct 2022, 19:57

The E-2C has a MMo of .70

And no mach meter..

I only ever remotely approached that in a dive though. Didn't have the power up high to do it, and you'd run into KIAS limits down lower where it could probably actualy break it..

Username Protected · **Posted:** 10 Oct 2022, 20:30

Falcon 10 is a lot of speed for the acquisition cost. Well above .80 and some days .85

Parts and maintenance may require more effort than a Citation..

Username Protected · **Posted:** 10 Oct 2022, 23:14

Username Protected wrote:

Here was a Mustang over the top of me with 118 knots on the nose.

This is not all that rare, especially in winter going west.

You buy a fast airplane not for the tailwind days, but for the headwind days.

For my V, 120 knots on the nose means 300 knots groundspeed. That is tolerable.

On a 300 nm flight with 30-40 knots of wind, the round trip times vary by 4 or 5 minutes. The extra speed does make the wind factor quite a bit less.

Also, being able to go up to FL450 sometimes allows you to get into reduced headwinds. They can be 30-40 knots less than at FL400. The range at FL450 into a headwind can be dramatically longer than lower both for reduced fuel flow and also reduced headwinds.

Mike C.