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Cargo Fire Protection Foil Bag

IP.com Disclosure Number: IPCOM000250589D
Publication Date: 2017-Aug-04
Document File: 4 page(s) / 300K

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The IP.com Prior Art Database

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Cargo Fire Protection: IP.COM

Abstract

Cargo Fire Protection Foil Bag

The general idea concerns the protection of an airframe against cargo fire by encapsulation of the burning cargo with a fireproofed foil bag supported by vacuuming the air out of the bag. For the realization of this idea the todays lining of the cargo compartment will be replaced by a fibre reinforce foil, which is covered with an intumescent paint on the inside. Furthermore, the parts of the new foil lining need to be interconnected to create an almost airtight volume resp. bag. The ceiling and the sides of the foil bag need to be attached to the A/C structure. In case of a fire inside the cargo compartment, the foil lining will be detached from the A/C structure. The foil bag falls down onto the ULDs (container and pallets) – analogue to a fire protection curtain. During a fire, air outlets as a passive system or vacuum pumps as an active system would vacuum the air out of the foil bag. As a result the volume inside the compartment bag will be significantly reduced. The controlled removal of air reduces the available amount of oxygen inside the foil bag and supports fire suppression. The intumescent paint on the foil bag prevents burn-through and protects the adjacent A/C structure in view of fire and heat. The minimized air volume inside the foil bag leads to a reduced amount of todays required fire suppression gas (e.g. Halon).

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Cargo Fire Protection Foil Bag

The general idea concerns the protection of an airframe against cargo fire by encapsulation of the burning cargo with a fireproofed foil bag supported by vacuuming the air out of the bag.

Fig. 1: General Idea: Oven Bag

Fig. 2: Concept of Foil Bag

Concept For the realization of the idea the todays lining of the cargo compartment will be replaced by a fibre reinforce foil, which is covered with an intumescent paint on the inside. Furthermore, the parts of the new foil lining need to be interconnected to create an almost airtight volume resp. bag. The ceiling and the sides of the foil bag need to be attached to the A/C structure.

In case of a fire inside the cargo compartment, the foil lining will be detached from the A/C structure. The foil bag falls down onto the ULDs (container and pallets) – analogue to a fire protection curtain.

During a fire, air outlets as a passive system or vacuum pumps as an active system would vacuum the air out of the foil bag. As a result the volume inside the compartment bag will be significantly reduced. The controlled removal of air reduces the available amount of oxygen inside the foil bag and supports fire suppression.

The intumescent paint on the foil bag prevents burn-through and protects the adjacent A/C structure in view of fire and heat. The minimized air volume inside the foil bag leads to a reduced amount of todays required fire suppression gas (e.g. Halon).

Fig. 3: Main Deck Solution (Freighter)

Fig. 4: Lower Deck Solution (PAX Aircraft and Freighter)

Benefits

• Protection of the A/C structure against fire in cargo compartment. • Air and oxygen reduction inside foil bag leads to reduced fire propagation. • Reduced volume in view of fire supressing gas (e.g. Halon) leads to benefits in view of

number of required bottles, weight and costs. • Today’s cargo lining incl. RD panels eventually obsolete. • (eventually) No rapid decompression-panels required for Rapid Decompression.

Technical Details Rapid Decompression for PAX A/C (RD)

• hole causing RD on upper deck o foil bag will be destroyed / collapsed by significant loads due to RD

• hole causing RD on lower deck o foil bag will be destroyed / collapsed by significant loads due to RD

• A pressure relief valve prohibits a volume increase, and hence an overload of the structure. • It needs to be verified that shrinking of the hose does not lead to an overload for the floor.

Presently, this is solved via rapid decompression panels. These panels wouldn’t be needed if the presented hose-solution becomes reality.

Foil design

• Foil bag consists of multiple foil segments, which are linked by mechanisms like zip fastener and hook-and-pile fastener (Velcro-strip).

• The foil segments are covered with intumescent paint on the inner-side of the foil. Limited scratches in the paint do not have an effect onto the fire protection due t...