![What is this round spinning thing on the back of a utility truck? It only spun when the van was moving. : r/whatisthisthing What is this round spinning thing on the back of a utility truck? It only spun when the van was moving. : r/whatisthisthing](https://preview.redd.it/px9ajr2h56b11.jpg?auto=webp&s=21022dc84fc649b5e700df7aa9bbc909ce16e902)
What is this round spinning thing on the back of a utility truck? It only spun when the van was moving. : r/whatisthisthing
![FLOWROTOR UltraFlow Low Profile Spinning Van Roof Vent Air Extractor Ventilator BLACK [FLOWROTOR UltraFlow Black] - £52.99 : FLOWROTOR - Van and Commercial Vehicle Ventilation - Spinning Roof Vents - Ducts - Solar Ventilators, Commercial Vehicle Air ... FLOWROTOR UltraFlow Low Profile Spinning Van Roof Vent Air Extractor Ventilator BLACK [FLOWROTOR UltraFlow Black] - £52.99 : FLOWROTOR - Van and Commercial Vehicle Ventilation - Spinning Roof Vents - Ducts - Solar Ventilators, Commercial Vehicle Air ...](https://www.flowrotor.co.uk/bmz_cache/2/2b66ae9e747118131a44a824858719dd.image.720x720.jpg)
FLOWROTOR UltraFlow Low Profile Spinning Van Roof Vent Air Extractor Ventilator BLACK [FLOWROTOR UltraFlow Black] - £52.99 : FLOWROTOR - Van and Commercial Vehicle Ventilation - Spinning Roof Vents - Ducts - Solar Ventilators, Commercial Vehicle Air ...
![What is this black Spinning thing on top of big black van? Ot speeds up and slows down, relative to the vehicle speed. I though maybe self driving radar, but maybe just What is this black Spinning thing on top of big black van? Ot speeds up and slows down, relative to the vehicle speed. I though maybe self driving radar, but maybe just](https://preview.redd.it/wfc65xdyhct11.jpg?auto=webp&s=ba2274a8615ef132c47c1550bf613621a8bee182)
What is this black Spinning thing on top of big black van? Ot speeds up and slows down, relative to the vehicle speed. I though maybe self driving radar, but maybe just
![مكتب حيوية تصادم طبي لتر رسول why do some vans have spinning things on top - sherwoodvillageanaheim.com مكتب حيوية تصادم طبي لتر رسول why do some vans have spinning things on top - sherwoodvillageanaheim.com](https://external-preview.redd.it/oRTgHmnmGhWzGUK2ZHSEiPWwTJNE31q6BQyWxVH4NjU.png?width=640&crop=smart&auto=webp&s=c49e49b36f3d274b127afae3db44267f6cfbbf39)