I'm building a short stubby rocket and plan to mount an altimeter in the fin can area between two of the fins. The body tube is 5.5" diam and 21" long. The distance between the centering rings is about 11" and there are 4 fins total.
My plan is to cut a long narrow hatch (apx 1.5 x 7.5") between the centering rings and mount the altimeter and battery to the inside of the hatch. I can put the baro vent hole very near the top of the fins so there shouldn't be much disturbance.
Is this a bad idea? I've seen this done before but it was usually a more square shaped hatch. I don't think this will weaken the structure too much because where it's located, but before I go cutting out a major section of the body tube, I want to be sure.
Thanks