Military UAVs require high-performing bladders that provide sufficient mechanical strength and fuel airtightness to withstand the rigors of military operations. Optimal performance is absolutely essential for long journeys in very high places, so you need a flexible container that is free from breakdowns, tears, and leaks.
VTI uses materials specially formulated for aviation fuel and is lighter than other competing products. Fuel bladder hardware (such as access hatches and port fittings) can be welded directly to the film using VTI's proprietary bonding process, or molded into a fitting and then RF welded.