I was looking into shooting a sports event, in this case a rally, and I wanted a cheap option to record both the pilot and the copilot.
After doing some research, I came across this option on Thomman store.
The price was within my budget and the quality seemed good, although you can only judge by trying. And that I did when they arrived. I immediately put one on the pilot and had a test run with the Mic. Incredible performance, very clear voice and very little background noise, engine noise, etc.
I had them hooked up to an XLR equipped recorder and that was it, a great shoot with some awesome very good quality cockpit sound.
If you have something in the works that needs such an option, you should consider these.