Is there a mistake in the Roketsan announcement, Hisar Missile seems to havea a two pulse engine in one chamber.
Am I wrong ?
It is for my opinion not moderate to publish such sensitive data. I can't follow and understand Roketsan
Dual Pulse Missile Propulsion System
LFK-NG
LFK-NG, Mission Scenarios
PSD-Demonstrator with HFK Airframe
LFK-NG is a ground based air defence missile. It is a multiplatform / multi-mission missile system having the capability to provide
- Camp / 360° asset protection
- Convoy protection
- Self-defence protection of helicopter and vessels
- Protection against all modern air-threats, in particular rockets and artillery
- A basic “Crewpad” configuration: enables fast deployment, early entry operations, with autonomous control or having the capacity to be linked to higher echelon command post control
The key element of the LFK-NG is its dual pulse propulsion system, which was developed by Bayern-Chemie, the programme for which included 2 successful test flights in 2005 and 2006.
Compared to single pulse propulsion systems of the same dimensions, the dual pulse propulsion system provides the capability of high agility to the missile system especially in the endgame scenarios and enlarges the no escape zone of the target.
The key characteristic which the dual pulse motor design enables is the capability to manage different thrust impulses according to mission need. The pulse management is achieved through the use of dual propellant charges separated by a frangible bulkhead, where the charges can be ignited separately.
Performance Characteristics include:
- No signature during coast-phase
- Active motor impulse control on mission demand
- Increased kinematic performance in endgame
- Avoidance of high peak velocities
- Increased range especially against highly manoeuvering targets
Technology:
- 2 separate propellant grains for two pulses in one motor case
- Pulse separation by passive frangible bulkhead
- Dual independent ignition systems
Technology Development – PSD (Pulse Separation Device):
The next stage in the evolution of dual-stage propulsion systems at Bayern Chemie was the development of a soft pulse separation system, termed the Pulse Separation Device – PSD. This technology was utilised on the HFK II motor, which employed a conical filament wound case structure. The design of the PSD was cleverly integrated into such a filament wound case structure and successfully demonstrated in two successful
flight tests carried out in October 2009 at the test range of the German armed forces
WTD 91.
Key features of the soft PSD design:
- Results in only minimal loss of propellant grain mass compared to a mono pulse grain.
- Allows the construction of dual pulse motors with filament wound case structures without the need to introduce heavy and costly split lines.
Benefits:
- The soft pulse separation device opens new fields of applications for dual pulse motors, for example with filament wound case structures and introduces the opportunity for the dynamic capability enhancement of existing systems
The dual pulse propulsion technology provides a cost-effective method to significantly increase missile interception capability at longer range and thus increasing the competiveness of MBDA’s missile systems. It is a mature and flight-proven technology, ready for immediate use.
http://enu.kz/repository/2010/AIAA-2010-6756.pdf