Delta MD-11s with 618,000lbs and 630,500lbs takeoff weight.
Hello! I have identified all but two former Delta MD-11s as 618k takeoff weight models.
Since I still unable to find a copy of the weight and balance manual or any airlines' MD-11 FOM, I would like some help from our experts. What is entailed with the 618k takeoff weight? Does this include the forward cargo hold auxiliary fuel tank bringing the total fuel up to about 278k lbs, or is this without the extra fuel tank (~258,000lbs max fuel)? Also, are the max landing weights for these models 430k or 458k lbs? Next, I am showing two models eligible for the 630.5k takeoff weight. Am I right to assume these come standard with the auxiliary 3000 gallon fuel tank in the forward cargo hold? Again, what would be the max landing weights for these models? Thanks guys, -Shane |
Originally Posted by DAL2728
Hello! I have identified all but two former Delta MD-11s as 618k takeoff weight models.
Since I still unable to find a copy of the weight and balance manual or any airlines' MD-11 FOM, I would like some help from our experts. What is entailed with the 618k takeoff weight? Does this include the forward cargo hold auxiliary fuel tank bringing the total fuel up to about 278k lbs, or is this without the extra fuel tank (~258,000lbs max fuel)? Also, are the max landing weights for these models 430k or 458k lbs? Next, I am showing two models eligible for the 630.5k takeoff weight. Am I right to assume these come standard with the auxiliary 3000 gallon fuel tank in the forward cargo hold? Again, what would be the max landing weights for these models? Thanks guys, -Shane |
This is very good information!
I am curious what a typical load and landing weight would for your average FEDEX MD-11. What is a typical flap setting and approach speed when landing at such a high landing weight? Since I don't have the FEDEX MD-11 to help me, some *rough* figures for this stuff would help me a lot. I can extrapolate from anything you can tell me! -Shane |
Originally Posted by DAL2728
This is very good information!
I am curious what a typical load and landing weight would for your average FEDEX MD-11. What is a typical flap setting and approach speed when landing at such a high landing weight? Since I don't have the FEDEX MD-11 to help me, some *rough* figures for this stuff would help me a lot. I can extrapolate from anything you can tell me! -Shane Vref 480,000lbs LDG WT Flaps 35 161Kts, Flaps 50 156Kts Vref 500,000lbs LDG WT Flaps 35 165Kts, Flaps 50 159Kts MAX LGW 481,500 UPS operates MAX LGW 491,500 LIMITATIONS "When operating aircraft at a MTOGW of 630,500 lbs on the ground with a total of 9,000 lbs or more fuel in the Aux and Tail tanks, manage the fuel system to maintain a ratio of approximately 7.5 to 1 between the Aux tank quantity and Tail tank quantity" I was taught that this is due to a load limitation of the nose landing gear. Tail fuel management does not have to work but you have to be permitted to load fuel in the tail. A good example is when for some reason the fuel system has to be operated in manual you can still load the proper amount in the Tail fuel tank, take off at 630,500 and then put it back into the AUX after take off. When I first flew the aircraft(1992) the MGTOW was 610K, changed to 618K, then 625.5K and then 630.5K. |
These Vref speeds seem awfully low with these flap settings. I had no idea they were so low! By Vref of 161kts at flaps 35, is this the speed you're touching down at, or the VAPP? I would have assumed the approach speeds at such a setting would have been something close to 170kts.
What would a typical approach speed be for a landing weight of, say, 430k? I'm just trying to get some estimates here so I can extrapolate for other weights for my flight model since I don't have real references but word of mouth right now. Thanks! -Shane |
Originally Posted by DAL2728
These Vref speeds seem awfully low with these flap settings. I had no idea they were so low! By Vref of 161kts at flaps 35, is this the speed you're touching down at, or the VAPP? I would have assumed the approach speeds at such a setting would have been something close to 170kts.
What would a typical approach speed be for a landing weight of, say, 430k? I'm just trying to get some estimates here so I can extrapolate for other weights for my flight model since I don't have real references but word of mouth right now. Thanks! -Shane |
So what would a Vref speed be for 430k?
|
Originally Posted by DAL2728
So what would a Vref speed be for 430k?
|
That's excellent! That's only two kts off from what I calculated!
Is there a performance chart or book that determines these speeds that I might be able to get a look at? |
Originally Posted by DAL2728
That's excellent! That's only two kts off from what I calculated!
Is there a performance chart or book that determines these speeds that I might be able to get a look at? |
|
All times are GMT. The time now is 14:12. |
Copyright © 2024 MH Sub I, LLC dba Internet Brands. All rights reserved. Use of this site indicates your consent to the Terms of Use.