Inflatable structures are self-supporting and self erecting fabric structures. The structures can be installed on almost any surface: concrete, tarmac, grass or compacted earth. The structure is secured to the surface by ratchet straps originating on load patches on the skin of the structure and terminating at earth anchors, which will typically be either ground earth anchors (sand/ fine soil), earth screw anchors (heavy/ clay soil) or anchor bolts (concrete). They can be installed and inflated by a 2 man team in as little as 30 minutes and deflated and packed away in one hour. No tools or lifting equipment is required – simply connect the air fans and watch the structure inflate. Once the structure is fully inflated, the control system will switch to intermittent mode, governed by pressure sensors, typically operating for 10 seconds every 5 minutes. Lindstrand inflatable structures are designed to withstand up to 80 knots wind speed, and have been proven in service.
The structure fabric is a military grade PVC coated polyester and complies with fire retardancy regulations. The only wear factors are UV and weather. An inflatable structure in continuous outdoor exposure can survive 10 years in the Tropics and 20 years in Mid-European conditions. An optional Mylar coating can be used on the outer skin to provide a highly reflective coating, which reduces increases in temperature when used in sunny tropic or desert climates. Most customers choose either desert tan or olive drab but almost any colour can be supplied. Post-assembly artwork can either be painted on or applied self-adhesive film. Lindstrand offers a standard range of hangars and shelters but can also produce bespoke modules to our client’s specifications. All buildings are designed for modular construction and can be grouped to meet the customer’s needs.
Robinson R44 Helicopter Hangar
The R44 hangar is comprised of 2 inflatable units and an ‘eyelid’ door. The dimensions are 15.48 m long x 7 m wide (external) x 4.0 m high (internal). There can be personnel access doors along the length of the building and hook up points are incorporated into the building to allow the integration of lighting or air-conditioning/heating systems. The hangar is built from two parallel layers of fabric with fabric formers perpendicular to both surfaces. This will give a condensation free interior and good insulation. The hangar fabric is a military grade PVC coated polyester and complies with fire retardancy regulations under BS 7835/ 5438 and for anti-fungal properties (MIL-STD-810E). The U-value is 2.2.
NATO NH90 Helicopter Hangar
These highly mobile and rapidly deployable structures provide an environment and repair shelter for the NH90 helicopter, support equipment and personnel that can be deployed globally. The hangar is made from Vectran fibre with similar strength to Kevlar but with none of the fatigue problems associated with Kevlar. Structures of this size are normally heavy, limiting their mobility and make their deployment time consuming. Use of lightweight, high strength fabric means the structure tips the scales at around 900 kg (1980 lbs). A fully retractable ‘eyelid’ front door provides stability in higher winds and protection against excessive snow loading. Once deployed to site, just 4 people can install the structure and make it operational in as little as two hours. Various alarm modes are included to the control system supplying information to the personnel supporting the NH90 helicopter.