TRAINING PROJECT SEMINAR STUDY OF INTERNAL PRESSURE MEASUREMENTS INSIDE A GUN CHAMBER PROOF AND EXPERIMENTAL ESTABLISHMENT(PXE), DEFENSE RESEARCH AND DEVELOPMENT ORGANISATION(DRDO), CHANDIPUR,BALASORE AASIFA ROUNAK REG. ID:10010103 MECHANICAL ENGG DEPT., VSSUT BURLA GUIDE: R.K.Gangwar; Scientist D,Weapon Wing
This document is posted to help you gain knowledge. Please leave a comment to let me know what you think about it! Share it to your friends and learn new things together.
Transcript
TRAINING PROJECT SEMINAR
STUDY OF INTERNAL PRESSURE MEASUREMENTS INSIDE A GUN CHAMBER
PROOF AND EXPERIMENTAL ESTABLISHMENT(PXE),DEFENSE RESEARCH AND DEVELOPMENT ORGANISATION(DRDO),CHANDIPUR,BALASORE
AASIFA ROUNAKREG. ID:10010103
MECHANICAL ENGG DEPT.,VSSUT BURLA
GUIDE: R.K.Gangwar;Scientist D,Weapon Wing
ROLE OF PXE• Evaluation of Weapon Systems
Evaluation of ammunition and weapon platform performance through dynamic
firing and evaluation.
Provide a fully instrumented and calibrated firing range for test & evaluation of
all arms & ammunitions of Indian /Imported origin.
• Dynamic Proof
• Proof & evaluation of ammunition production batches from Ordnance
Factories.
• Conduct design and developmental trials of armament stores, i.e., weapons,
ammunition and their components.
• Technical evaluation of imported weapons and ammunition. Conduct
developmental trials for different armour materials.
• Carry out out-turn proof of weapons, ammunition and their components,
as also armour produced by Ordnance Factories, PSUs and trade firms.
• Depot check proof.
• Investigation firing and failure analysis.
• Analysis of ballistic data and design parameters.
• Undertake projects for design and development of range
instrumentation, as also projects for improvement and modernization of
range techniques and facilities.
To help integrate all fire support assets into combined arm operations
Destroy, neutralize
or suppress the enemy
FIELD ARTILLERYMISSIONS
PARTS
Multiple rocket launchers - Mobile rocket artillery Launcher
Howitzers - capable of high angle fire
Gun howitzers- capable of high or low angle fire with a long barrel
Field guns - capable of long range fire
Mortars - lightweight weapons that fire projectiles at an angle of over 45 degrees to the horizontal
Mountain guns - lightweight weapons that can be moved through difficult terrain
Infantry support guns - directly support infantry units (mostly obsolete)
TYPES
Internal ballistics, a subfield of ballistics, is the study of a projectile's
motion from the time its propellant's igniter is initiated until it exits
the gun barrel.
•Energy is imparted to the bullet in a firearm by the pressure of the gases
produced by the burning gunpowder.
•Chamber pressures in the range of 60,000 PSI are produced.
•PHYSICS OF FIREARMS:Delivering maximum destructive energy to the target
with minimum delivery of energy on the shooter. The momentum delivered to
the target however cannot be any more than that (due to recoil) on the gun-
shooter system.
ON FIRING
pressure curve of a typical cartridge (in this case from the M193 5.56mm cartridge using 846 ball
powder)
TYPES OF PRESSURE MEASURING SYSTEMSCOPPER CRUSHER GAUGE
• The gas pressure is applied via a piston to a calibrated copper crusher.• The amount of deformation of the crusher is used as a measure of the maximum
pressure.
IPGs
• Used for continuous pressure-time recording.• Piezoelectric technology is insensitive to electromagnetic fields and radiation,
enabling measurements under harsh conditions
STRAIN GAUGE
• A strain gauge takes advantage of the physical property of electrical conductance and its dependence on the conductor's geometry.
• Typical input voltages are 5 V or 12 V and typical output readings are in mill volts.
SERBERT’S VELOCIMETER
• Discrete values of the projectile’s in-bore velocity can be obtained by mechanical or optical switches.
• Most of these techniques imply the drilling of holes in the barrel. Non-destructive and continuous in-bore measurement techniques for determining the projectile’s velocity are generally based upon the Doppler effect.
WHY IS PRESSURE MEASUREMENT IMPORTANT?
1. For testing the barrel strength to withstand bends and cracks on impact of known intensity and duration.
P1- 15% more than the working pressureP2-20% more than the working pressure
2. For testing propellant charge.
3. For testing of internal bore and driving band accuracy.
4. For estimating range and time of flight.
5. To check for leakage and other technical glitches.
1.COPPER CRUSHER GAUGE
MK 8 gauge
MK 9 gauge
1. Calibrated by a special crusher gun and plotted on a tarage table.