Flick knife, with folding blades.
(Cheating really, I worked on the prototypes in 1976!)

No, the subject (aeroplane or car) should be sharp, but the background will blur – giving the proper impression of speed, if the shutter speed is low enough. However for aircraft the sky (unless cloudy) blur won’t show up.
Have a look at the excellent aircraft photos on this Forum, although most of them are taken by experts with VERY expensive cameras!
If you are using a digital camera, don’t be afraid to take lots of pictures and erase the duds, that’s what every one does! Also you can usually check immediately on a digital camera whether you managed to get the subject in the frame, amount of blur, and so on.
Good luck and practise, practise, practise!

Thanks, BigVern, it was a long, long time ago but I think that’s “my” T87 near the top of the picture, but we fired white missiles in 1967 or thereabouts, they weren’t green then. The V-bombers were also white, in my opinion much better looking!
Funny, but I seem to remember the cliff edge being very much closer to the radar.
This is the first time I have ever seen a picture of Aberporth!
Of course the most important place is not visible – the pub at the bottom of the cliff path, where we would retire on days (many!) when the weather was too bad for firing.

Game, set and match as far as I am concerned!
I hereby withdraw from this thread.

And don’t stop moving the camera when you press the button! (The technique is called “panning” by the experts.)
Some digital cameras have a delay when you press the button, which can mean that you only get the tail or even perhaps nothing at all in the picture if you stop!

Shame you took it off, frankvw, as a professional translator I was just going to attempt to rewrite that post in English!

Reynolds collection Miles

The Whitney Straight at Wetaskiwin.

Avro Lincoln RF533

Just found these on page 30 of the Warpaint Lincoln booklet.