Hello,

 

In anticipation to what is to be the release of the year, i was wondering.

 

I wondered whether any of the Beta testers had experienced any vortices with the 777?

 

I also miss these with the 737NGX, thats why i ask.

 

I look forward to hear from you!

 

 

Not to my knowledge.  There's an effect associated with fuel dumping, though.

I had the pleasure of sitting in Economy "plus" in a 777-200 operated by British Airways in a 10 hour long haul between Bangalore, India and Heathrow, and witnessed some beautiful contrail displays on takeoff from a moisture rich VOBL runway.  I was seated right next to the engine cowling ahead of the slats, and saw contrails form from a kind of appendage on the side of the RR engine, as well as on the wingtips.   Would be so cool to see those in FSX!

I had the pleasure of sitting in Economy "plus" in a 777-200 operated by British Airways in a 10 hour long haul between Bangalore, India and Heathrow, and witnessed some beautiful contrail displays on takeoff from a moisture rich VOBL runway.  I was seated right next to the engine cowling ahead of the slats, and saw contrails form from a kind of appendage on the side of the RR engine, as well as on the wingtips.   Would be so cool to see those in FSX!

 

I don't think you call that contrails. Those are vortices and other phenomenons caused by pressure differences which are result of air flowing over the wings, along the engine cowlings etc. Because air flows faster at some points like on the upper side of the airfoils and air being suck into the engines, this increase in speed causes the airpressure in that flow of air to drop, resulting in immediate condensation of the moist in the air. Well, at least I think that is what you mean. Same for the wingtip vortices, those are caused by high pressure air from below the wing, flowing around the wingtip to the top side of the wing (because the pressure of air is lower on top of the wing, air tends to flow from high to lower pressure areas. This happens in a circular fashion causing a spiral in the air with a low pressure core, which again triggers the condensation of the moisture.

 

Tried to explain it as good as i could, correct me if i'm wrong.

Not to my knowledge. There's an effect associated with fuel dumping, though.

Any chance of a screenshot?

Not to my knowledge.  There's an effect associated with fuel dumping, though.

 

Thank you for your response.

 

Did have the vortices effects with the NGX? i wondered if i am the only one who did not see them with the NGX yet. i do have them with the 747, especially in rain on approach to Hong Kong. really nice to see.

 

Maybe it is something one can propose to the development team? 

Hello,

 

In anticipation to what is to be the release of the year, i was wondering.

 

I wondered whether any of the Beta testers had experienced any vortices with the 777?

 

I also miss these with the 737NGX, thats why i ask.

 

I look forward to hear from you!

I've seen them on the ngx several times, espeically during landing.

 

John

I've seen them on the ngx several times, espeically during landing.

 

John

Really? I have never seen them... Must be because I usually am at the controls during landing. Nice to know though!

Yeah, well me too. That's what instant replay is for. ^_^

 

John

Just one question regarding the topic of vortices. Does that word include the fog you can see in the engines of that 77W  ? If yes, than I can tell you, I've read the thematic around half a year ago in a post. Someone of PMDG, think it was Ryan, wrote that by now it's not possible to display this feature on FSX, they tried to do it, but the results didn't seem well, so they left it behind. Of course it would be nice to see the T7, but I agree it's till today not to performe.

 

 

They might want to surprise us...surprise, surprise  :rolleyes:  Alex

The vortex generated on the engine wing (not sure what's the correct name) when an 777 rotates is very common as well.

 

 

2:24 when the aircraft rotates.

People are confusing vortices with condensation.

 

Vortices are those spirals, formed by the rotational movement of fluids left by the plane behind it. They are created by the difference between lateral speeds of the air above and below the wing. The farther from the plane, the larger the vortex radius. They are not visible unless you have clouds, smoke or condesation. They are also intimately related to drag and wake, and are reduced by winglets. http://www.youtube.com/watch?v=uy0hgG2pkUs

 

Condensation is formed because of high level of air humidity combined with sudden drop of pressure caused by high acceleration and speed of airflow. They are usually seen on the engine entrance, wing tips or flap tips, in fog it can cover the whole wing. http://www.youtube.com/watch?v=KoeM6opOq8E

 

Contrails are formed by the condensation of the water vapor that leaves the engine. In this case, the water vapor is one of the products of the fuel, although with greater air humidity, more condensation is formed (longer contrails).

To me the difference is clear.

 

But with the NGX i havent seen any of them.

 

The 747 had the nice effects though!

 

So therefore me question fot the 777