Hi there!

 

How do I evaluate the initial cruise level that the MD11 is capable of climbing initially to for a given weight?

 

I do not mean the value indicated on the FMS PERF page, but a table in the handbook ( or other ressources around ).

 

I remember there was a table given in the B744X handbook, however, I couldnt find anything similar for the MD11.

 

This is especially of interest on short haul flights with a very high ZFW, in which cases the MD11 is neither able to climb to it's service ceiling ( due to weight ), nor will it be possible to perform a step climb ( due to short flight time ).

 

So, for flight planning purposes ( entering a cruise level into a fuel calculator ), it would indeed be very helpful to evaluate the initial and highest optimum cruise level for that flight at a given weight in advance before you enter the cockpit.

 

Best regards

 

Toto

For some reason Boeing wont give out the data hense why PMDG didn't provide us with it.

 

However, you can find the data along with the FCOMS on the net, just don't post the links on Avsim!

For some reason Boeing wont give out the data hense why PMDG didn't provide us with it.

 

Here's my guess. There was a condition in the merger paperwork that McDonnell Douglas gave Boeing that their performance numbers would not be given out to the public.

My thoughts exactly

Ok, so how do you evaluate initial cruise climb capabilities of your MD11 during preflight preparations ( whilst still outside the cockpit )?

 

Best regards

 

Toto

Well to be honest, as far as the PMDG MD11 goes after flying her for a while I get a feel of what flight level would be most suitable depending on what the GW will be.

 

When I take a look at the FMC predictions it is normally pretty close or exact to the expected initial opt flight level that is required.

 

As mentioned before, all the data you require is out there on the internet if you want to understand the aircrafts limitations & optimum performance.

 

The developers did an excellent job of capturing the feel of the aircraft.

 

Regards

If you pre-flight the FMS fully, the PERF page will give you OPT/MAX alts. I use this as the starting point as it is based on the TOGW. I then use OPT as the first altitude in the list of altitudes for cruise (e.g. if PERF says OPT 341 I will use 340/360/380/400/420 and let it determine step climb points).

 

Best regards,

Robin.