Computing Touchdown Point
on February 13, 2013

For safety monitoring we are very interested to know where an aircraft touches down on the runway. There are two problems here, namely knowing where the aircraft is and when it touches the runway. In

Measuring Air Temperature
on February 6, 2013

OK, it’s really easy. You stick a thermometer out of the side of the aircraft and read what it says. Nothing could be simpler, until you fly through a cloud. I’ll take these two parts – “fly” and

Einstein and Newton Stop on the Runway
on January 31, 2013

In my last blog I mentioned two different ways of looking at the ability of an aircraft to stop on the runway, and here is a supplement about dimensional analysis of these measures. In dimensional analysis

Unusual Open Source Freedoms
on January 16, 2013

Let’s talk about free beer. To quote from, “…free software” is a matter of liberty, not price. To better understand the concept, you should think of “free” as in “free speech”, not as in “free

on January 2, 2013

I recently took a canal boat holiday to Chester. Earlier in the year we held a Safety Seminar at Baltimore where Renee Dupont-Adam spoke on the subject of human factors in aviation safety. Now,

Driving Safety Attitudes
on December 19, 2012

Ah, the joys of aviation. You find me aloft at more than 30,000ft blissfully unconcerned by the unnatural feat I am undertaking. I have handed my safety to the skill of the crew; people I have never met

Hurrah for Firm Landings
on December 12, 2012

I have the pleasure of working each day with Capt. Derek Murphy, who is an experienced 146/RJ captain and safety manager. Derek has a splendid way of observing life. For example, we were discussing

Data Latency
on December 5, 2012

One important characteristic of flight data is that, as we discussed previously, the parameters are sampled different rates and there may be different latency (the time from the measurement being taken