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Forum: ATC Issues

29th Nov 2018, 16:12

Replies: 64

Plessey Watchman primary radar

Views: 27,086

Posted By P160

Chevton, the BA car park was a 264H 50cm, put up...

Chevton, the BA car park was a 264H 50cm, put up there to increase low level coverage but was not succesful due to the fact that the anntenna design required a ground plane 5o form the beam pattern,...

Forum: ATC Issues

29th Nov 2018, 13:06

Replies: 64

Plessey Watchman primary radar

Views: 27,086

Posted By P160

That image is the LHR Marconi 264 atop of the BA...

That image is the LHR Marconi 264 atop of the BA staff car park in the BA maintenance area east of the terminals and yes, that with the other three 264's did cause TV interferance which is why we no...

Forum: ATC Issues

29th Nov 2018, 07:07

Replies: 64

Plessey Watchman primary radar

Views: 27,086

Posted By P160

Radar towers to the best of my knowledge have...

Radar towers to the best of my knowledge have never been constructed with mechanical fuse pins to make them frangible due to the tremendous side loads imposed on the structure during high winds and...

Forum: ATC Issues

28th Nov 2018, 18:40

Replies: 64

Plessey Watchman primary radar

Views: 27,086

Posted By P160

Just for interest, when I first started at LHR in...

Just for interest, when I first started at LHR in 1978 there were four Marconi 264H radars, one Cossor ACR6, one Plessey AR1 and one Decca ASMI surface movement radat. When I left in 2010 there were...

Forum: ATC Issues

28th Nov 2018, 17:41

Replies: 64

Plessey Watchman primary radar

Views: 27,086

Posted By P160

You are correct Chevron, it was a composite...

You are correct Chevron, it was a composite sandwich. Outside layers of glass cloth and epoxy resin with an inner metal sheet layer of aluminium, after all, glass cloth and resin are transparent to...

Forum: ATC Issues

27th Nov 2018, 19:33

Replies: 64

Plessey Watchman primary radar

Views: 27,086

Posted By P160

The LHR Watchman went to Edinburgh if I remember...

The LHR Watchman went to Edinburgh if I remember correctly to replace the Marconi S511 hybrid, (Marconi Tx/Rx/Signal Processor and Plessey Aerial and Tower from the AR1. Not sure about other airport...

Forum: ATC Issues

27th Nov 2018, 16:30

Replies: 64

Plessey Watchman primary radar

Views: 27,086

Posted By P160

The Heathrow 23cm radar was mounted on a concrete...

The Heathrow 23cm radar was mounted on a concrete tower adjacent to Terminal 1 car park in the central landside area by the exit/entrance to the tunnel giving access to the terminals from the A4 and...

Forum: ATC Issues

27th Nov 2018, 13:48

Replies: 64

Plessey Watchman primary radar

Views: 27,086

Posted By P160

The radar between T1/T2 and 23/05 was a Raytheon...

The radar between T1/T2 and 23/05 was a Raytheon 10cm which was purchased by BAA to replace the NATS Watchman at Perry Oaks which had to be removed to construct T5. The Marconi 264's were further...

Forum: ATC Issues

26th Nov 2018, 15:40

Replies: 64

Plessey Watchman primary radar

Views: 27,086

Posted By P160

The Heathrow Watchman was never at T2 or one of...

The Heathrow Watchman was never at T2 or one of its "fingers". It was beside the Perry Oaks sewage farm besides the fuel tanks now the site of T5, it almost suffered a hit from an IRA Mortar shell...

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