Air exit vent with engine box?

TW I'm glad you're aware of how quickly the composite structure gets compromised in a fire. Sounds like there isn't much of a firewall to start with.
These are not nice things to think about, but we're always practicing stuff in case of not nice things happening.

Realised I've owned three gliders with air extractor vents, the first was a Nimbus 3 with the exhaust at the bottom of the rudder. Because of the length of the resonating chamber the sound it produced had more low frequency component than the vents we see now in JS-, AS- etc. It's the change in low frequencies that I noticed with the extractors.
Jim

On Tuesday, November 24, 2015 at 11:58:01 PM UTC-8, Tango Whisky wrote:
Am Mittwoch, 25. November 2015 06:55:20 UTC+1 schrieb JS:
Bert, a fuel line snagged when the prop was extended.
Fuel leaked into the engine compartment.
The extinguisher was in the car at the side of the runway.

Schleicher has since changed their fuel line material. Schempp might still be using lines that are not aviation grade. They are not aviation grade on my club's Duo XT. Don't know about others.

TW, your fuel lines likely go through the engine compartment. After a leak a retracted engine could cause a fire.
Jim

Jim,
the holes in my engine bay wall are covered with stainless steel mesh which would prevent flames leaking into the cockpit during the few minutes (seconds?)the engine bay wall hasn't burnt down (the expoxy burns quite well, and it's not even a sandwich structure), or the fire hasn't extended via the fuel lines which run underneath the seat pan.

And - if I specifically ask an engineer from Schempp-Hirth whether it's ok to drill these holes, and he tells me to go ahead, I tend to believe that he knows about the wall.

Cheers
Bert
(yes, TW's name is also Bert ;-))