When stacking different size Flexifoils, more distance should be allowed between each kite. 72 inches is a good starting point, especially when stacking 6ft and 10ft Flexifoils together. Smaller kites are usually put in front of, or below, the larger sizes. The Hot Shot 4 is not suitable for stacking with other sizes due to its small Wingspan.

1) In Line The main flying line is used to link each kite together by forming loose loops at each connection point. The disadvantage with this system is that over time, the line will wear out at the attachment points and result in loss of flying line. To avoid wasting the main flying line a sacrificial Dacron leader can be used which can be replaced when worn out. Always use Dacron for this leader.
2) Train-Line This method of stacking uses pre-measured pairs of lines with loops at each end. These are used successively to link each Flexifoil together. The main flying line being connected to the bottom kite in the stack. Make sure that the INNER line goes UP to the next kite and the OUTER line goes DOWN. This will ensure an upward flex in the spars when under load.
When stacking with the In-Line and Train-Line systems, the pull is transferred from kite to kite and eventually down the main flying line. This can exert excessive forces on the spar tips of the lower kites. The two Loop methods of Stacking relieve this problem and are more suitable for Hot Shot 4's and Flexifoils with Ultraflex spars. The Inserted Loop system, though initially time consuming, is probably the best stacking technique.
3) Loop The Loop stacking system consists of two Dacron lines with loops tied at the correct spacing down their length. The loops are approximately 2 inches long and connect the kites individually. Do not make these loops too long as excessive jostling may occur at take off as each kite tries to set its angle of attack. These pre-looped Dacron lines can be connected to the main flying line and can accommodate as many Flexifoils as needed.
4) Inserted Loop This technique is very similar to the Loop method though the loops are formed by inserting them into the train line section. Short lengths of Dacron (200lbs) are formed into 5 inch loops and connected to the train line at pre-measured intervals. These loops are then prevented from slipping up or down by another short length of Dacron. This allows the main or train line to be Kevlar or Spectra as there will be no wear except to the Dacron loops. These can be replaced if needed. Attach each loop around the main line at pre-measured points by passing it through itself 3 times. Pull tight. Thread the anti-slip pieces of Dacron approximately 2 inches on either side of the loop and knot the exposed ends.
The Inserted Loop system is used for flying very large stacks of Flexifoils (Over 150) to preserve the maximum line strength. To launch a stack of Flexifoils is no more complicated than a single kite. Remember that to fly, the kites must be fully inflated and right side up. With a number of kites in a stack it is wise to use an assisted launch. The helper should lift the top kite, the one farthest away and allow it to inflate. As it begins to rise it will lift the others into the air and the stack will soon take off. Be prepared for the pull that stacked Flexifoils can generate. Do not attempt to fly stacks of Flexifoils until you have become proficient with a single kite. USE EXTREME CAUTION AND COMMON SENSE WHEN FLYING STACKS OF FLEXIFOIL POWERKITES. YOU ARE RESPONSIBLE FOR THE SAFE OPERATION OF YOUR KITES.

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