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rjsl608
6th Jan 2002, 16:14
It is true to say that even the most basic career guid, when looking under the profession "pilot" will mention a high level of mental numeracy.
Just how quick? what sort of calculations? under how much pressure? & to what accuracy? Some examples please.

Thanks in advance.

Matthewjharvey
7th Jan 2002, 14:21
Try these examples -

ETA at point X which is 67 miles away, 150 knots true airspeed, 10 knot tailwind.

How many miles to descend from 30000' to 4000' at 1000'/minute @ 300knots groundspeed.

How many miles off course if 5 degrees off required bearing at a range of 45 miles?

What rate of descent required on a 3 degree glideslope with a groundspeed of 130 knots.

These are fairly typical, many can be estimated by rule of thumb approximations which you will learn.

Don't get disheartened if you are not numerically inclined - many pilots are not, but with practice you will be able to answer questions like those above.

CaptainSquelch
8th Jan 2002, 03:30
Are you flying without FMC Greaser? <img src="tongue.gif" border="0">

Sq

Jetdriver
8th Jan 2002, 03:48
No matter how many FMC'S, Graphs, Plastic cards, calculators, whizz wheels or other toys the mental math ability is the final gross error check.

The last line of defence !

QNH1013
8th Jan 2002, 06:25
Jetdriver is right, it's your mental maths that is the 'error check' to double check that what your computers tell you are sensible (the computers mostly being alot more accurate anyway!) However I will dare to admit that my mental maths is useless. I hated studying it in school and I should have done more mental practic with even the basic calculations. BUT, to be an airline pilot, the reality is that it is not a MUST to be able to mentally calculate with great speed and accuracy the various sums like The Greaser has nicely given for examples. Of course it does help you get through the tricky airline aptitude tests to have sharp mental skills. (and also to get through basic training) I managed to get through that net somehow! I operate the 737-300 and I have never had to use the examples given except for the last one, where you calculate approximate rate of decent for a non precision approach. But then you can also look at the Jepp chart with will also give you target rate of decents for groundspeed. Aslo the 1 in 3 profile is easy enough to use to approximate your decent profile. The FMC is the thing of today and if you don't have one then yes, you will ALSO need to calculate drifts, ETA's, top of decents.

So my point is, you meed some sort of logical mental ability, but you don't have to be a genius. My calculator is a mandatory item for me to bring on flights. After all I need to fill up the voyage report, adding fuel, working out total flying time, dividing up flying time to P2 and P1U/S and also night and day. But that's just the paperwork and I could do it menatally....but I'd sure talke 3 times the time to work it all out! My mental maths is lousy, but I get buy and so can you. And by the way I've become much quicker with my mental maths because of sheer practice. So if it's not sharp to start of with you'll get better....or in my case only a bit better! :)

stator vane
8th Jan 2002, 14:02
the math part that always gives me trouble is:

how much money i spent to get here in the ever
changing ratio to how much money i am getting here, in comparison to how much it costs to be here, versus how much it costs to move, multiplied by how often the airlines have then changed the bases, factored by the risk of the airlines going out of business, balanced with the cost of getting a new job, starting new aircraft and the whole game again, allowing for the ever reducing chances of employment due to increasing age, decreasing visual accuity, ever increasing cost of living, the ever increasing taxes, with how many hours i spend away from home per hour of flight, per hour in hotel room, per strange meal in strange restaurant,

not to neglect;

one needs to be adept at estimating the amount of radiation being received whilst sitting in the cockpit with the aircraft radar on, taking into consideration the radar energy of all these other aircraft around contributing their bits as well, not to mention ATC's radar and unknow military activities and experiments.

one needs to be able of calculating the danger of allowing one's blood sugar level to continue dropping with its adverse effect on performance in direct proportion to the danger of eating the remaining crew meal after cabin crew have had their choice of offerings.

one needs the ability to rapidly and correctly calculate the proportion of truth and bovine feces contained within the calculations, decisions and announcements of upper management.

above all one must be able, by recall, to measure the differences between being employed and not being employed, between flying and not flying, between admitting the mistakes one has made in his or her career and learning from them rather than blaming others for adverse conditions


<img src="smile.gif" border="0">

DVR6K
8th Jan 2002, 14:14
I found when I did my Maths GCSE, my mental arithmetic (unlike my spelling) was top notch. Having not done maths for 5 years now, my skills are fading a bit.

However, I have recently spent a few quid on a mental arithoaghosfmatic book to sharpen up the maths a bit and it works a treat. Itīs easy stuff when you get going but it prepares you well for the hardcore stuff.

Buy one!!

QNH1013
9th Jan 2002, 09:28
Well, I certainly don't need any Maths book to prepare me for any 'hardcore stuff' when I'm on any flying trip! :)

Obi Wan Kirk
9th Jan 2002, 14:12
There is a really good book out I bought a few years ago called "Mental Math for Pilots" it's published by Cage Consulting and written by Ronald D. McElroy. The ISBN 0-9642839-7-2. You can buy it at <a href="http://www.cageconsulting.com." target="_blank">www.cageconsulting.com.</a>

I found it useful, give it a try!

rjsl608
10th Jan 2002, 00:00
THanks VERY much guys your input is greatly appreciated.