Defense Issues

Military and general security

Archive for June, 2015

Airborne IRST properties and performance

Posted by Picard578 on June 16, 2015

Introduction

IRST is a sensory device which uses IR (infrared) radiation for detection and targeting purposes. IR radiation has wavelength of 0,75 to 1.000 microns (micrometers), longer than wavelengths of color red in the visible spectrum (visible spectrum ranges from 0,39 to 0,7 microns, with violet at 0,4 and red at 0,7 microns). It is given off by all objects above absolute zero, though objects that are below average temperature of their surroundings will absorb far more IR radiation than they will give out. Unlike FLIR which is a targeting device, IRST can be used for initial detection as well. Read the rest of this entry »

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Being a poodle of Washington doesn’t pay off – it’s dangerous and expensive

Posted by Picard578 on June 14, 2015

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Characteristics of aircraft types

Posted by Picard578 on June 1, 2015

ROLE AIR SUPERIORITY BOMBER INTERCEPTION GROUND ATTACK CLOSE AIR SUPPORT
SIZE small (surprise, agility) large (range, missile load) medium-large (surprise vs range, weapons load) small-medium (surprise, agility vs endurance, weapons load)
NUMBER OF ENGINES single (agility, surprise, operating cost) twin (top speed) twin (damage tolerance) twin (damage tolerance)
COCKPIT/CANOPY TYPE bubble (situational awareness) sunk (drag reduction) sunk (drag reduction) bubble (situational awareness)
WING SWEEP moderate (maximum/cruise speed, turning performance, airfield perf.) moderate to high (high altitude performance vs maximum speed) low to moderate (low speed/altitude performance) none to low (low speed agility, airfield / low altitude performance)
WING LOAD low to moderate (agility) low to moderate (high altitude performance) high (gust sensitivity) low to moderate (low speed agility, airfield performance)
CREW 1 1-2 2 1-2
GUN CALIBRE 20-30 mm (firepower vs loadout) 25-30 mm (firepower vs loadout) 25-30 mm (firepower vs loadout) 25-30 mm (firepower vs loadout)
GUN TYPE revolver / linear action (response time) rotary (maximum rate of fire) rotary (maximum rate of fire) rotary (maximum rate of fire)
SENSORS IRST, RWR, LWR, MAWS radar, IRST, RWR, LWR, MAWS radar, FLIR, RWR, LWR, MAWS RWR, LWR, MAWS, (FLIR)
ENGINE TYPE afterburning turbojet / afterburning low bypass turbofan (speed, acceler.) afterburning turbojet / afterburning low bypass turbofan (speed, acceler.) afterburning turbofan (speed, endurance) nonafterburning high bypass turbofan (endurance)

NOTE: reason for selection of certain characteristics is explained in brackets. Aircraft that are intended for more than one of listed roles will have characteristics of several types.

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