Yup, that's why it's so damn hard dude. You have to pretty much crash that damn jet into the thing, get out, and hope he doesn't realize that a fuckin' jet just crashed into him, and then pack like 3 or 4 C4's on him. :/ Only managed to do it three times until he got smart. Then he just shot me as soon as I got out everytime.
Something else we tried was this: I put 6 packs of C4 on Archie's jet. On the nose. He tried to land on the runway and ram it into the CRAM. I detonated too early though, but it was close