Simviation Forums

How come on jets that I've downloaded that say they have a max speed of mach .88, I get the overspeed warning at around 360kts?

In realism settings check display true airspeed.and that should fix that if i am thinking along the same lines as you are.and climb it up to FL 30 thousand and open it up and see if it reads diffrent.

KIAS changes at different height, KTAS does not.

Ok, then how about a couple basic flight questions:

- What is minimum IFR flight alt?
- What is max speed at VFR alt?

250kts below 10000ft I think.

He goes:

14 CFR - CHAPTER I - PART 91

Wow, thanks.  I went to the site and did a search for max. speed, but couldn't find any results.  Maybe I was just searching wrong.  I'm sure there is a max speed over public airspace?

Remember, these regulations were written mainly by lawyers... They won't tell you everything. I've been using the FARs for quite a while, I'm used to the vocabulary they use.

Though I'm not a pilot, the following sentence (a) ...

"Sec. 91.117

Aircraft speed.

(a) Unless otherwise authorized by the Administrator, no person may operate an aircraft below 10,000 feet MSL at an indicated airspeed of more than 250 knots (288 m.p.h.). "...

means that higher than FL100, you cam fly as fast as the aircraft will allow you to.

JF

Thanks, but I guess my point is, we have a millitary base right in our City.  There have been a few times the pilots have broken the sound barrier in an F-16 and there was a lot of trouble over the issue.

So, if you jet will do mach 1, are you allowed to fly it as such over the US and if so, why didn't the Concord do as such?

Thanks

First off, I don't know the FARs like JF does so this is just a "layman's" opinion.

It seems to me that the F16s got into trouble because of the noise generated by the sonic boom.  Speed in and of itself I don't think was the issue.  If it were possible to fly at mach 2 and not create a sonic boom I think the Concorde would still be flying.  However, at this stage you can't separate the two so pilots have to be careful.

Even at normal speeds there are noise abatement laws all over the US.  Airline pilots have very strict altitudes, speeds and headings to control noise over neighborhoods around airports.

So, in general, above 10,000 feet you can fly as fast as you like as long as you don't disturb the community you're flying over.

If this sounds like catch 22 it probably is.

gw

That's a perfect answer and what I was looking for.

btw - We live in Arizona.  There is a canyon north of Phoenix where the freeway comes down one side of it.  There is about a 1,000 foot drop to the bottom and a good 2,000 feet to the top of the mountain and the canyon is about 5 miles across (maybe 10).  The day these F-16's were flying, we were driving down this canyon when they flew down the middle of it at about eye level.  Our kids just about jumped out of the car.  Everyone on the freeway were slowing down to watch as they blew by and headed down the canyon.  One of the coolest things I had ever seen.

Thanks!

Golf Wiskey / Mickey, remember, if you're talking F-16, that's another ball game... The FARs don't apply to the military. They have their own rules. As for the noise abatement rulemaking, you are right. Sonic boom was a major player in Concorde's downfall.

JF

PS. Mickey, even though I live in Quebec, I know that canyon past Phoenix (Highway 10?)... Worked For BA Learjet in Tucson for 6 months a couple years ago. Nice spot: I understand why people would stop along the freeway to watch the show.

Another good spot which you should know living in Pheonix is the end of runway 08 at Sky Harbor, along the back road. Took some great pics back then. And the sound the wing makes when cutting through the air is unbelievable.