It's hot in here! A few countermeasures.

 I think this is the record temperature in the Luton box:

I need to do something about it. One measure is to add a portable air conditioning unit. It consists of 2 parts: one to be mounted inside, the other at the outside. Is supposed to be hung out of a window. I use the upper half of the emergency door as a window. Needed to cut a ark plexiglas screen which is to be inserted into the opening of the window.

And: success. The temperature went down.

Another attempt: using a blue tarpaulin outside over the roof. 

But the effect was negligible: 

Need to mount the tarpaulin higher, so that there is at least 10 cm air between the tarpaulin an the roof.

Towbar

A towbar was mounted. Now I can pull 3 tons.