You forgot to mention what happened if you sounded the (roof mounted) air horns with the sunroof open!

Sweavo’s comment on yesterday’s blog reminded me, strangely enough, about what happened if you sounded the (roof mounted) air horns with the sunroof open.

The sunroof was a tilt-and-remove one. It would be tilt-and-slide, but being in a pickup, there was nowhere to slide to. So if you wanted a full open roof, you’d open it, click the quick release and the whole panel came out.

I already mentioned the small sliding windows - they weren’t great for ventilation, and there were no fresh-air vents due to, like fuel gauges and so on, those being considered a luxury item on a commercial vehicle of that era. So basically, I ran with the sunroof tilted open for most of the time.

I have made a virtual reality artists impression of the scene to help you picture it…

Now lets look at a few axioms and postulates. (I don’t know what that means, but I think it sounds good).

1. Sound reflects from hard object.

2. Glass is hard. Especially the toughened glass used in making sunroofs.

3. Therefore sound reflects from sunroofs.

4. The angle of reflection is equal to the angle of incidence from a plane perpendicular to the reflecting surface.

5. The sunroof’s angle is such that any sound entering from directly behind will be reflected directly downwards.

6. The airhorns are directly behind the sunroof.

7. The driver and passenger of a car are directly below the sun roof.

A picture is worth a thousand words, so I shall present the results in just that manner…