The following FAQ's answers commonly asked questions concerning threat protection along with other related issues.
When Bravo Zulu Is Your Answer.
Bravo Zulu is your solution if:
- Massive Amounts of Concrete and Steel are Impractical
- You Need One Solution to Stop Multiple Threat Types
- The Threats Are Unknown
- No One Else Can Provide Your Solution
- The Goal is to Defeat the Threat, Not Merely Survive It
- Saving Lives and Assets Matters
- Security and Stability Need to Be Enhanced
How does one weaken explosions or make them “less bad”?
All explosions involve very fast-moving gas, and most involve rapid heat release. High-velocity gas flow passing Bravo Zulu’s beads causes “instantaneous” drag energy dissipation, and that is removed directly from blast energy. The same gas flows over the large surface area “quenches” hot gas, which also means energy, is transferred from the blast. Thermal radiation from the fireball is also absorbed. By rapidly quenching and weakening the blast, the explosion is unable to generate secondary hazards, such as causing “post-blast fires” in nearby combustible materials, such as paper, flammable vapors, and spilled fluids. This combination minimizes damage potential and thereby renders explosions “less bad”.
How do you measure explosive strength or hazard?
Blast effects are measured in terms of pressure and duration of the positive “overpressure” event. From this and other data, unconfined and partially confined blasts are generally characterized by “scaled distance”, which is a measure of blast “intensity” that enables direct comparison of explosions involving different charge weights and different explosive materials. With the scaled distance concept, explosives engineers compare blast events to “TNT-equivalent charge weight”, generally abbreviated “NEQ” or “NEW”. This concept allows test data and interpretations with small charges to predict effects with much larger charges (at longer distances). Fragments from cased munitions and debris from destroyed structures may also pose hazards. Fragment penetration capability is rated through several standard tests, such as the US\Department of Justice NIJ0101.03 or NATO’s “STANAG” 4569. Similarly, “safe separation” distances are mandated in several widely used standards to prevent debris from one blast from either injuring people or causing other explosions remote from the initial explosion. Safe separation distances use the NEQ/NEW concept.
What if I put 3 ZuluShield layers together, 1 on top of another–will that reduce blast effect to 1/3 compared to using just 1 layer?
With explosive dusts and gases, the quenching reaction happens within a centimeter or so of the ZuluShield surface, so making it thicker makes no difference (surface coverage is very important, in contrast). With detonating solid explosives, thickness is important only for intense blasts, such as large charges in containers, with dense-packed munitions, or large anti-vehicle ground mines. For very intense blasts, a layer of extinguishing chemicals is much more helpful instead of more of the bead-filled ZuluShield layers..
How much ZuluShield do you need for a given explosive size? Where do you put it?
Inside a box or small room, ZuluShield should cover most or the entire available surface. Outdoors and facing an intense blast, partitions or walls faced with ZuluShield should be located such that the top of the wall should be at a roughly a 30-degree angle drawn between line-of-sight to a target and the solid explosive charge (so that the blast wave cannot travel directly to the target without interacting with ZuluShield). Inside tunnels and corridors–and narrow streets with tall buildings, ZuluShield should be placed from ground level to higher than the explosive charge over the area that must be protected. Inside tunnels, ZuluShield should also be placed along the ceiling to eliminate blast reflections off the ground. Where possible, ZuluShield in “billboard” (e. g. transverse) arrangements should be placed periodically along the ceiling to localize blast effect and gaseous fireballs.
How does one basic design work against everything from TNT to gas cloud detonations?
Shock wave and blast gas velocities are very fast coming off the explosion, thus mitigation through very rapid energy dissipation occurs as described above. The ZuluShield filler materials also collide with one another causing more energy subtractions through friction and momentum transfer. With flammable dusts, mists, and gases, flame fronts move very slowly at first. They later build up rapidly when confined, particularly with obstructions (such as vehicles in tunnels). Pressure buildup is strictly from the creation of large amounts of gas from the reactants, until the “snowballing” flame front transitions into an actual explosion. ZuluShield works with these “slower” reactions by “quenching” the flame front, thus combustion stops and no more hot gas is produced. Quenching occurs with the same filler/core construction that works for detonating solid explosions works with burning gas, etc. by dropping the flame front temperature below the minimum temperature necessary to continue burning. The solid filler blocks thermal radiation from the flame front that otherwise would preheat the unburned fuel and air–thus making re-ignition of the unburned fuel unlikely.
Can ZuluShield protect against every kind of explosion?
If “involved” in the fireball of a detonating explosive, or if impinged upon by a rapidly-spreading fireball in a flammable dust, mist, or gas cloud, then ZuluShield will mitigate the hazard. For gas and dust explosions, the combustion reaction stops at ZuluShield. For detonating solid explosives, ZuluShield can be designed to reduce the blast effect sufficiently for the specific application. This determination is made based upon the strength of the blast, as well as the function and the vulnerability of the impacted target.
If ZuluShield doesn’t dissipate all of an explosive’s energy, what happens to the rest of it?
If outdoors, blast energy dissipates very rapidly on its own. For intense blasts near structures or vehicles, other components and/or geometrical arrangements are used (deflectors, crushable backings, special ZuluShield mountings, chemical additives, etc.)
What configurations can Bravo Zulu provide with its products?
Bravo Zulu has the technical engineering expertise to provide the most cost effective configuration to protect your personnel and/or equipment. We can engineer to fit most any protection need of the client. Clients specific needs can be met by using a variety of special products that resist explosive, fire and forced entry events. Bravo Zulu is one of few companies that can provide both engineering expertise and a complete range of protective products. Whether it is structure, vehicle (aircraft or ground) or special applications, we offer a complete range of protection.
What level of protection does your FE/BR structure provide?
The Bravo Zulu FE/BR structure has been tested by The Department of State (DOS) and has met the certification criteria for 60-minute forced entry resistance and for ballistic resistance to 5.56 mm and 7.62 mm NATO rifle ammunition. The product is certified as Bravo Zulu FE/BR Model GPS-60RDOS-01
What Standards was the Bravo Zulu FE/BR structure tested to?
The Bravo Zulu FE/BR products were tested under the provisions of SD-STD-01.01, Revision G (Amended), Certification Standard, Forced Entry and Ballistic Resistance of Structural Systems and are certified with a DOS code of 2133 and the DOS model number of GPS-60R-BZS-01.
Why Should I Buy from Bravo Zulu rather than a competitor that has been in business longer?
Even though Bravo Zulu is a newly formed company, the experience and technology applications from Bravo Zulu are the best in the business. The principals in Bravo Zulu have an average of over 25 years experience in their respective fields. Bravo Zulu products are designed using the latest technology and material science. One primary advantage is that the Bravo Zulu products are much lighter than the competition. Bravo Zulu’s products combine steel, high quality composites, and nanotechnology to produce lightweight materials offering the highest levels of protection against explosive pressures, ultra-extreme heat and the ballistics of modern weaponry.
Bravo Zulu Services Data Sheet
- D&B DUNS Number (Dun & Bradstreet) = 55-601-10832.
- Central Contractor Registration is as follows:
- Confirmation number is UN4HRE
- Trading Partner Identification Number (TPIN) is procured.
- Marketing Private Identification Number (MPIN) is procured.
- Standard Industrial Code (SIC) is 3999
- North American Industry Classification System (NAICS) is 339999
- Commercial and Government Entity Code (CAGE) is 41KA7
- Department of Commerce
- ECCN – (Export Commodity Classification Number) is EAR 99.
- Department of State
- BZS – FE/BR model number is GPS-60R-BZS-01
- DOS- code number is 2133: Bravo Zulu -Model Number for FE/BR is Model GPS-60R-DOS-01
- Note: A DOS-DSP-5 Form must be completed and submitted to
- the DOS for all DOC Export Sales for BZS FE/BR Products