I’m not sure if this is the right place to post this, so apologies if it isn’t.

For my first attempt at subdivision modelling, I’ve chosen an aircraft fuselage and I’m running into problems with my edge flow. The fuselage can be divided into three parts: A rounded top, a flat side and a rounded bottom. The flat side ends near the front end of the fuselage in a triangular shape, and both the top and the bottom join together from there. Each segment joins together with a sharp edge.

Trying to figure out the edge flow where the three conjoin is beyond me. If I leave the triangle as it is and inset the faces of the sides, I get an artefact. My latest attempt was to try turning the triangle into a pinched quad and continuing the entire side around the front of the craft, but this looks wrong in terms of accuracy to the aircraft I’m modeling.

I’ve edited the picture below to show the basic setup of the craft. The red circle highlights the problem area. It’s still left as it was when I tried to turn it into a quad, but the pinched end is supposed to be a triangle. Can someone please demonstrate how this could be done? Thank you in advance.