Payload Box v1 Requirements


Balloon Mounts

1 rope will pass into the payload frame, through a cutdown device, and then back out the payload frame to the balloon. These two rope ends will bear the normal flight load of the payload box and ballast box. This rope will be severed in the middle, and both ends must pass out through the payload box/frame.

A third rope should be hard mounted to the top of the payload box in the center. This will support the load only after cutdown.

Ballast Box Mounts

Ballast box will be mounted to two ropes mounted to the payload box. These should bear the full weight (6lbs+ occasional jerks) of the ballast box. They need to provide rotational resistance so the ballast box cannot rotate in relation to the payload box.

A set of wires must exit the payload box and travel along one of the ropes to the ballast box.

Legal Requirements

Payload Box must not have an area density of more than 13 g per square centimeter. The area density referred to in c) 3) is determined by dividing the total mass in grams of the payload package by the area in square centimetres of its smallest surface.

Payload Item Weights

Each payload box is allowed a weight of 6 lbs. (2720g). See Speedball-1 page Weight budget for exact items weights.

Battery Box

  • Dimensions: 125mm x 140mm x 125mm
  • Weight: 50g
  • Battery Weight : 810g

Electronics PCB mounting plane

  • Dimensions: 16cm x 18cm
  • Vertical clearance from plane surface required: 8cm


hardware/requirements/payloadbox/v1.txt · Last modified: 2018/07/29 17:58 (external edit)
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