Payload– the capsule that contains the equipment for the flight.
A 10p sits inside to show scale.
The payload is made of polystyrene and weighs around 200g. We chose this as it’s remains lights but at the same time, a very good heat insulator and sturdy enough to hold the equipment.

The walls are around 45mm thick meaning more heat will be retained during flight. Essential when the outside temperature can drop to around -50 degrees! 

At around 245mm, the square payload will be cut precisely to allow for the camera’s and other equipment that need to access the outside of the box. For example: holes for the lens, holes for attachment to the string.
The lid will be secured down with a strong adhesive tape and we are thinking of attaching the payload to the balloon with some strong string.
An important note to remember is to leave a few gaps for air to circulate as the pressure of the atmosphere can sometimes cause the payload to expand and break.

A phone inside the payload shows the depth and the internal volume, which is roughly 3 litres. We should have plenty of room within the payload as the walls will be cut through to allow the camera to be positioned inside.
We have to allow room for:

  • 2 x cameras
  • 1 x GPS
  • 1 x heater
  • 1 x external power charger
As we’re only at the beginning of the design and build process, we may encounter problems or decide to change the design based on other factors. We’ll try to keep everyone updated on the changes and will explain why we have done so.
Please leave a comment or if I have missed any vital information, let me know and I’ll edit it!
The payload was purchased from Ferribox at

3 Responses

  1. laminate the Box inside and out with kitchen Aluminum foil . Use 3M Super 77 contact glue to stick it , and use foil duct work tape to seal it. Might throw one of those little hand warmer packets in just before sealing the box up , just to help . Its going to get Really cold and stay that way for a while. Doing the above, your gear should stay nice and warm and functioning throughout the mission duration .
    Good Luck

  2. Thanks e1cycle! Great idea for retaining the heat….also, the foil will help us see the payload when locating it on retrieval!
    Instead of using the hand warmer packets, we are designing a unique heater and info on that will be up soon.

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