JohnC--"rim"ember the '50s--PacRim jetblast

John on your third leg it looks like you was flying at mach 1 which is not allowed, 661 knots GS is mach 1 and you was flying at 662 knots GS. I could be wrong as my math is not that great but it does look like you broke the sound barrier on that flight.
 
gandy said:
John on your third leg it looks like you was flying at mach 1 which is not allowed, 661 knots GS is mach 1 and you was flying at 662 knots GS. I could be wrong as my math is not that great but it does look like you broke the sound barrier on that flight.
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Ya, max IAS was 701, snuck it in between duenna samples. Kinda hard to say 'overspeed' in a dive when the max alt was 5k feet.

:wiggle:
 
gandy said:
John on your third leg it looks like you was flying at mach 1 which is not allowed, 661 knots GS is mach 1 and you was flying at 662 knots GS. I could be wrong as my math is not that great but it does look like you broke the sound barrier on that flight.
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661 knots GS is mach 1
First, GS is variable with the relative head/tail wind so it's no use.
However, "given a standard temperature condition of 15c, the speed of sound at sea level is 661 knots." Note: that's at ISA (29.92" and 15*C)

.. and that's one of the flaws with using "mach". It's a variable. It is dependent on temperature and air density which will vary in r/l and the sim. On one test flight I did, I zigzagged back and forth across the northern hemisphere jet stream. M 0.89 stayed constant and the IAS varied somewhere in the range of +20 to -10 kts as I went from the 'warm' side to the 'cold' for a period of about 30 minutes.

For our testing purposes, MSFS "Clear" wx is used to recreate ISA which would be calculated by flight test engineers to obtain performance data, or in our case, the ability (or not) to reach M 1.00 in level flight at a variety of altitudes. Once in operation (ie the race) Real World Wx and altitudes then adds in temp and density so IAS vs Mach is now not constant.

Here is a reference I found to explain why the website does NOT include Mach numbers in there data...
http://www.militaryfactory.com/aircraft/mach.asp

Rob
 
gandy said:
John on your third leg it looks like you was flying at mach 1 which is not allowed, 661 knots GS is mach 1 and you was flying at 662 knots GS. I could be wrong as my math is not that great but it does look like you broke the sound barrier on that flight.
Click to expand...

What is not allowed is an aircraft that can achieve Mach 1 under its own power. What you saw there was a 180 degree wind shift that threw the aircraft over mach 1. The aircraft can only produce enough power to fly in level flight .98 Mach. Which does not give you a whole lot of wind shift room before you break the sound barrier.

Which brings us to a story you should hear Rob tell about an air traffic control towers inaugural celebration.

The aircraft John is flying has a max mach number of 1.20 which the aircraft can only reach in a very steep dive. This is far more accurate than having an aircraft like the F-86 with a max mach of .99 when the real aircraft could exceed mach 1 in a dive.
 
LOL, Touche' DD. Discredit the messenger. Surely you don't mean my F-86 that goes overspeed at M. 1.02, much less realistic than an A-4 that goes overspeed at M 1.2, and runs M 0.98 all day long.

...now isn't this fun ? I love the part about the undocumented wind shift.
 
Dangerousdave26 said:
What is not allowed is an aircraft that can achieve Mach 1 under its own power. What you saw there was a 180 degree wind shift that threw the aircraft over mach 1. The aircraft can only produce enough power to fly in level flight .98 Mach. Which does not give you a whole lot of wind shift room before you break the sound barrier.

Which brings us to a story you should hear Rob tell about an air traffic control towers inaugural celebration.

The aircraft John is flying has a max mach number of 1.20 which the aircraft can only reach in a very steep dive. This is far more accurate than having an aircraft like the F-86 with a max mach of .99 when the real aircraft could exceed mach 1 in a dive.
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you could be right but i would expect the tail and head wind to be a little higher. can i have a link to the aircraft please :)
 
Down safe RCTP.

Fuel used: 2105.2 lbs.

Total used: 18,718.2 lbs.

Republic of China (Formosa) bonus: -30 min.
 
WTG on another smokin hot leg. Over 600 kts GS average!! I don't think my jet could do that in a hurricane.

Vicious
 
Another fast leg! I think you must be using those missles as JATO packs. BTW, what are those missiles supposed to be? They kind of look like HARM's, but they seem a bit on the small side.

Vicious
 
Vicious said:
Another fast leg! I think you must be using those missles as JATO packs. BTW, what are those missiles supposed to be? They kind of look like HARM's, but they seem a bit on the small side.

Vicious
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That's a good question on those missiles Vicious. The aircraft depicts Commander Everett Alvarez Jr. Aug. 5 1964 aircraft, the first American shot down and taken prisoner; for 8.5 yrs. Too early to be HARMS, to big to be (and don't look like) sidewinders. Maybe some flavor of early Sparrow or whatever preceded it. I'm sure one of our resident Navy experts can chime in to ID it.

http://www.military.com/Content/MoreContent?file=ML_alvarez_bkp
 
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