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As a cautionary note, do not drag the envelope bag along the ground when pulling the envelope out. Many envelopes have holes and tears caused by being dragged over sharp objects while getting the envelope out of the bag. Lift the bag clear of the ground and carry it unless the launch surface is perfect with no sharp objects or dirty spots.Spread Layout
The spread layout method for inflation is the most widely used method. By handling the envelope with the load tapes, the fabric is pulled away from the center until the envelope takes its normal shape while still flat on the ground. Exercise
of a fuel leak or ruptured hose, there are three or more tanks feeding the leak. This is an extremely hazardous practice.)
Pilots should also note that there is a growing trend towards the use of inflation, or “pony” tanks, used to supplement on-board fuel for inflation. Use of an inflation tank allows the pilot to launch with completely full tanks, as the additional tank is either temporarily plumbed into the balloon’s fuel system by the use of a quick-disconnect fitting, or hoses are switched around at the burner fitting. There is no manufacturer’s written procedure available for the use of an inflation tank, and the procedure is strongly discouraged. Of perhaps greater concern is the mindset that the one or two gallon advantage this gives the pilot, is of greater concern than the safety aspect of the procedure. If a pilot consistently requires these one or two gallons of fuel to safely conduct a flight, then there are possibly other performance planning factors being neglected.
Most pilots conduct a burner check at the beginning of each flight. Others, if conducting multiple flights over a relatively short period of time (a weekend balloon rally, for example), may do a full burner check for the first flight only, and then only check for leaks on each remaining flight. This practice, while common, may violate the manufacturer’s operations manual and invites problems; it is best avoided. Instrument Checks
It is appropriate to check the instruments at this point. Virtually all instrument systems currently in use require battery power; it is wise to check the instruments, and ensure that the batteries provide sufficient power to operate them. There is nothing more frustrating than being ready to fly and finding that the instruments do not work. After the instruments are checked for operation, they may be mounted in the basket. Some pilots choose to set the altimeter at this time; the barometric pressure should be set according to the information gathered during the weather briefing. In the absence of a barometric pressure setting, the altimeter should be set to the appropriate field elevation. The only time that the altimeter may be set to zero is when the balloon is being flown from an ocean beach; 14 CFR part 91, section 91.121 provides clarification on this requirement. This is necessary to avoid airspace issues. [Figure 6-10]
At this point, the basket is on its side with the instruments mounted and ready for the envelope to be attached. The pilot and crew should open the envelope bag, remove the suspension cables and attachment hardware (carabiners, “A-blocks,” or toggles), and attach the bottom of the envelope to the basket superstructure in accordance with the manufacturer’s instructions. Care should be taken that cables are not twisted and are free of damage, kinks, loose wires,
6-11
Figure 6-11. A spread layout.
Figure 6-12. A strip layout.basket according to the manufacturer’s instructions. This method minimizes handling the fabric on a rough or dirty surface. It requires more diligence by the ground crew to ensure it deploys correctly.Progressive Fill
Inflation out of the bag is a coordinated technique in which the envelope is cold inflated directly out of the bag. With the envelope suspension connected to the basket, it is pulled progressively out of the bag as the fan is running, inflating the envelope as the crew slowly, with pauses, carries the balloon bag away from the basket while the envelope fills. Another variation, the progressive fill, has the crew holding the envelope in their arms, gradually releasing more and more of the envelope, from mouth to top, until the very top of the envelope is released for filling. The progressive fill packs the lower portion of the envelope with cold air, and exposes less of the fabric to the ground. This method generally results in a faster inflation, but may create problems with attaching a parachute top or ensuring that lines are not tangled. Inflator Fan Placement
The type of inflator fan needed for different layout techniques depends primarily on the amount of work required. The strip layout method requires a large, strong fan to force the envelope into shape, while the spread layout method requires less fan energy.
Fan placement and techniques are as varied as the pilots who fly. It may appear that every pilot has a slightly different technique for placement and use of the fan, but the general principle is the same. The fan should be placed to the side of the basket [Figure 6-13], with the air flow directed into the mouth of the balloon to inflate the envelope, but far enough
　
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