Stretching your Python – Part 2
Dave Jesse on May 22, 2013

In this, the second of a two-part thriller, I promised to look at the numerical python library Numpy. Numpy is one of a pair of extensions to the Python library, with a partner Scipy dealing with scientific

Stretching your Python
Dave Jesse on May 17, 2013

The Python programming language (actually, it’s named after Monty Python, not the snakes) is very popular and its user base is growing rapidly. I don’t plan to go into the reasons for this here, just take

Key Point Values
Admin FDS on May 9, 2013

Those of you who have downloaded the POLARIS software will have seen a module which computes all the Key Point Values (KPVs) from a flight segment. This blog will just scratch the surface

All in a Flap
Dave Jesse on May 1, 2013

To allow an aircraft to fly slowly flaps and slats of various forms are used. These both increase the effective wing area and increase the camber of the wing, which increase the lift that can be achieved

Breaking Runways
Dave Jesse on April 19, 2013

This week I am at a conference in the USA, so it’s a quick blog from the hotel room between presentations. Let’s talk about runway_snap, one of the POLARIS library routines. The POLARIS open source

Truck and Trailer
Dave Jesse on April 10, 2013

After a short Easter break from blogging, it’s time for a nice easy topic. As you will see, I really should have posted this one two weeks ago… Imagine, if you will, a delivery truck bringing chocolate

Ground Cushions Are Not Fair
Dave Jesse on March 27, 2013

Imagine you are a particle of air way up in the atmosphere. An aircraft flies past 100ft above you, and for a moment you duck to let it pass by. This is a happy way of thinking about the local air movements

Inertial Smoothing
Dave Jesse on March 21, 2013

Aircraft height and speed are typically sampled once per second. Sometimes this is not good enough for the question we are trying to answer, for example “what was the vertical speed at the moment of touchdown?”.

Beware of Trolls
Dave Jesse on March 14, 2013

We all get asked to agree to license agreements from time to time, and if you are anything like me, you won’t bother to read all the pages of small print before installing the latest software update. In

Which way to the North Pole?
Dave Jesse on March 7, 2013

So it’s really easy to measure heading. You just get out a compass and it will point North. Easy, eh? But, you’ve guessed it, life is never that easy. Firstly, the compass in an aircraft has to compensate