think I saw a weird drone last night

think I saw a weird drone last night
Time: around 8:40 pm

Location: rural Oregon City, OR area

Note - I used to be a commercial drone pilot.

I board my horse in rural Oregon City, OR, under a busy flight path with lots of air traffic heading to PDX. I see planes all the time. I know what they look like at night. This one was weird in a few ways: It didnt have a headlight, it sounded different, it was BIG for a drone -- much bigger than any commercial drone that would be flying around rural Oregon at night.

Lights: no headlight. 3 red lights. One white light on the bottom. I saw it from multiple angles as it was flying towards me, then turned.

Sound: Portland Police Bureau has a small airplane that they fly low over the city a lot. Im very familiar with that sound (I actually live in Portland but visit my horse 3-4 times a week in Oregon City). I've heard lots of airplanes in my life, of many different sizes. Most objects in the air I assume are airplanes. I look at the night sky a lot and always have. I grew up in a rural area and have continued my rural hobby for the last 40 years consistently. Since the sun goes down at like 4:30 pm this time of year i am outside under the stars a LOT and have been for decades. This object sounded weird. Definitely more drone buzzy, but a deeper buzz than my commercial drone I used to fly.

It was flying pretty low and I got a good look at it as it banked. The lights configuration was not regular, which was the first thing I noted about it, especially that it didnt have a headlight. There were a bunch of planes flying too, they were higher up, and lit up as normal.