Prodera - Modal Analysis - Pyrotechnical thrustor

In flight vibratory analysis of aircraft structures , carried out by means of impulse excitation applied through thrustors , offers positive advantages compared with other processes :
         * Reduced testing time
         * Small size
         * Simple application

The PL 81 thrustor is a new model of simple design and of reliable and reproductible operation, allowing the synchronization of several thrustors controlled simultaneously.

It is composed of a rectangular bar made of a block of hollowed-out aluminium , equipped at one end with the firing relay (black powder plus firing tube) , and at the other end with the ejection nozzle for the gases , mounted perpendicular to the top face , including its security device.

The principal charge consists of propergol strips whose lenght and thickness are calculated to suit the desired force and combustion time.

The PL 81 thrustor meets the standard operating specifications and the particular ambient conditions for in-flight tests (temperature vibration , shock , pressure , etc...).

	PL 81 I	PL 81 II
Conventional thrust	600 N	200 N
Charge	0.5 g black powder 8 g propergol	0.25 black powder 3 g propergol
Conventional combustion time, depending on the thickness of the propergol strips	Type D 12 ms Type C 18 ms Type B 22 ms Type A 26 ms
Dispersion over firing period	ą 4 ms
Frequency range depending on the thickness of the propergol strips	Type D 30 - 70 Hz Type C 20 - 50 Hz Type B 10 - 40 Hz Type A 5 - 30 Hz
Ohmic resistance	2 ą 0,4 Ohm
Minimum operating intensity	0.35 A
Recommended ignition intensity	> 2.5 A
Safety and measurement intensity	< 0.05 A
Weight	200 grams	125 grams
Overall dimensions (mm) (delivered with cable 50 cm)	137 x 23 x 25	78 x 23 x 25
Fixing points	4 holes M4 diameter, hole spacings 114 mm x 20 mm	4 holes M4 diameter, hole spacings 60 x 20 mm
Operating and storage temperature	From - 40° C to + 70° C
Flash point	140° C