RE: Knowledge Quiz for Warbird wiz
Sea sponges?
I recall reading of large sea sponges being used as "improvised" filters...but that might not have been in the Medaterainain theater?
Edit:
So I don't derail the thread...the sponges were used by Japanese mechanics. I remember now, reading in (I believe it was ) an Arco-Aircam publication on the Ki-61 about the mech. having problems with the sand and ground up coral from the runway being ingested into the Ha. 40 and 140 engines.