That's the "Auto-Vent System" designed to keep you from choking on
gas/oil fumes... :-D I'll bet that doesn't happen with Renny's LAK-17bfes.

On 3/27/2017 7:59 PM, MNLou wrote:
I have the same issue when I fire up the sustainer engine on my LAK17at. Don't know why.

During normal flight, never an issue - at any speed. Start the motor and, boom, the side vent flies open. This is flying at 51 kts.

I'll try closing the front vent the next time and see if that helps.

Lou

--
Dan, 5J