PhAF Purchase Considerations

 With the PhAF (Philippine Air Force) set to buy at least 6 Attack Helicopters soon, here are just some of my thoughts:

* Aside from the price, maybe we should also look at the overall package each manufacturer will be bidding. Items like:
– TRAINING (Pilots & Maintainance personnel)
– SPARE PARTS
– WEAPONS

* I was thinking that perhaps we can ask the bidders to also include TECHNICAL DRAWINGS for the parts, but w/ only 6 aircrafts to buy, am not sure if the manufacturers will aree to that.
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Radar Detection and The Horizon Distance

While reading some of the posted items about the our Peacock-class Corvette’s radar and gun range, I just came across the problem of detection by Radar because the “Horizon Distance”.

A typical Radar system is limited in terms of detecting objects close to the surface of the earth because of the curvature of the Earth. It is ideal for detecting aircrafts flying at altitude, but for ships, or very low flying aircrafts, its detection range would be limited by the height of the object being observed, and the height of the Radar Transmitter/Receiver (T/R).

A typical formula for Horizon Distance I found in the web (click here) is HD = SQRT(H)*112.88 where:
HD = Horizon Distance in km.
H = Height of the Observer
112.88 = Formula Constant
Continue reading Radar Detection and The Horizon Distance

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