I just got the 737 Performance Referance Handbook for my IPAD. I got it so i can have a better understanding of the performance of the 737 and its now got me thinking about TOPCAT calculations here goes...

 

 

There is a few things i would like to discuss; VMCG and the little table below plus TOPCAT calculations for Balance field length and unbalanced field length.

 

As you can see with this table below i'm trying to work out my V speeds which i done no problem, but for the V1 (MCG) Check i don't understand that table, its showing double figures like 94 91 etc what does this mean and how can i equate this to my V1 speed?

 

[Don't post images of copyrighted material]

 

Now for TOPCAT calculations, why doesn't it work out your VMCG? or how can i work it out? Also does it run off the Balance field length or the unbalanced field length?

V1 decreases as your pressure altitude increases. See the row along the very top with the altitudes. 

Ok my chart got deleted

Well, you're not supposed to post material (pictures, documents,...) on here, when you don't own the copyrights to said material. AVSIM could (and has, in the past) get into serious trouble for something like that.

You can find the table at 

 

737-800/CFM56-7B26FAACategory C Brakes

 

Performance InflightGeneral

 

PI.30.29

Vernon

 

You can't see the forest for the trees.

I know the basic idea of Balanced Field Length and these are the speeds you get from the FMC (Vspeeds) but what exactly are the speeds when using a Balanced V1, Balanced TOW?