340-300 & 330-300 to the list as well

Sorry guys....little time to read everything, let alone respond.

 

Good posts!

 

@Kyle....great info and I have to read it again to grasp it all :-)

 

 

Just for info.

I fly the 777-200ER and with that one, even at MTOM you dont run into the problem of getting above 250kt clean.

 

If they would have given me a heavy -300 yesterday, then I would have probably said something to ATC like "climbing 6000ft, minimum clean 260kt"

But you guys are correct....I have never heard anybody say that.

My on -300 type experienced college would then probably have told me that you dont have to say that....and that would be the end of it.

 

See...not a specialist...and there is allways something new :-)

And the MD-11, which is still around as a freighter.

 

I fly the 777-200ER and with that one, even at MTOM you dont run into the problem of getting above 250kt clean.

Yeah I figured it would mostly affect the 77L, F and W. That said, are your -200ER's the ones with the 298t MTOW, or one of the earlier, lower MTOW? What about a -200ER out of say FAOR (Johannesburg) at 5500ft ASL?

 

Also to the poster who suggested A340-300, I didn't think of it, if only because I didn't think the hair dryers would allow it to achieve over 250kt anyway.. :P  I can also see MD11 needing that sort of speeds if heavy.

Same like driving a car.

When the speed limit is MAX 120km/hr we dont drive 128km/hr but we all drive 110-120 correct? ;-)

 

 

Gotta love that example! :)

Haha..its otherwise in reality..speed limit 120 then people drive 130-150 :D

 

Gotta love that example! :)

Yeah I figured it would mostly affect the 77L, F and W. That said, are your -200ER's the ones with the 298t MTOW, or one of the earlier, lower MTOW? What about a -200ER out of say FAOR (Johannesburg) at 5500ft ASL?

 

MTOM of (our) -200ER is 295.835Kg.

I have never been to FAOR...but if it is in my company Laptops database (which I doubt) then I can do a performance calculation. I will take a look in a few days.

Or any other high-altitude airport that may push you over the 250kt rule

Or any other high-altitude airport that may push you over the 250kt rule

It's the aircraft's weight that would affect weather or not it's clean maneuvering speed is over 250 knots. Not airport field elevation

yip sorry I was more thinking along the lines of the higher V speeds associated with these types of airfields.

yip sorry I was more thinking along the lines of the higher V speeds associated with these types of airfields.

Actually, v-speeds are in indicated airspeed, so they won't change too much based on altitude. But the true airspeed will be higher due to the thinner air

Actually, v-speeds are in indicated airspeed, so they won't change too much based on altitude. But the true airspeed will be higher due to the thinner air

This will teach me to post after 2 glasses of wine. Basic aerodynamics goes out the window. For some reason I was thinking of the tire-limited speeds on the 777 out of Johannesburg, they can bump up against the max tire speed, but you are right V speeds would be in IAS, but groundspeed much higher. That said, at 5500ft at JNB, you are over half way to 10,000ft anyway! 

For a little anecdotal evidence, I departed LAX last night, on the way to SYD and had a 260 knot clean speed in the 300ER.