Limiting speed for Pilot vent window on a Cruisemaster

[leadsledfan]

I have the small 5 inch by 6 inch vent window on my Cruisemaster which is limited to 120mph if I remember correctly.
I have accidentally had it open above the limit but didn't notice any adverse effects besides a whistle and the suction the window created (with the fresh air vents open)
Is there a safety hazard to having it open?

 

[Ralph925]

Mine says 100 mph.

 

[leadsledfan]

It probably is 100.
My question is what is the hazard with having it open above that speed?

 

[lwford]

I have mine open at 135 mph just to try and keep cool. I found no ill effect. Lynn

 

[leadsledfan]

Thanks!
I forgot mine was open recently on a hot day, and was cruising along at 145ish with no noticeable effects besides the whistle and suction I mentioned.
I just wanted to ensure that I was not causing some serious damage somewhere by inadvertently leaving it open.

 

[Rob58]

Be careful you don't get sucked out of the window by the sudden decompression.

 

[shipchief]

On my first flight in 9800B, the door popped open and our chart for Louisiana and Texas flew out the door. It happened so fast it sounded like a gun shot!
I wonder if the speed placard for the window is for a similar reason?