Weird looking „plane“ I saw in 5th or 6th grade

Rhineland-Palatinate, Germany Spring or Summer 2013/14 Around 13:40 / 01:40pm

I remember this sighting so vividly, and it was a huge thing between me and my friend back then, we made all sorts of theories what that could have been and I still haven’t found out.

It was a sunny day after school, my friend, who visited me that day and I just got off the bus when we made our way home. We were chatting the whole time when my friend suddenly stopped and asked me if I see that. There was a white… thing? in the sky at around 3-4km height that was pretty much shaped like a plane, flew relatively slow and made no noise. The strangest part was that it had 3 noses (I hope that’s what you call it). I also don’t remember there being any windows. We looked at it for maybe 10 seconds and then we just ran off because we were so scared. We instantly told everyone we saw an UFO but nobody really believed us except my grandpa who said he saw weird things in the sky himself from time to time. As I got older I couldn’t stop thinking about this thing and started searching the internet. I suspected it could have been a drone but I never found anything similar. Maybe someone knows what this was or has seen something like it? I would love to hear what you think about it because I FINALLY want to know. Maybe the bad drawing helps ahahahhaa