Excellent thought-out method, Jay. In a roll over you'd be without worry. I also see not much "sky" is blanked out for the needs of visual separation. I like your split design a lot. 👍

  That experience scared me enough to consider that Certificated ownership was (is) hampered by not being allowed to innovate legally! Even if it made logical sense to do mods. That being said; I owned and perfected N1100Y (1962 B model 150) as much as I could for over two decades.

My thoughts on the fuel eject is based on pressurizing the header tank to purposely blow a fuel jettison "fuse" just ahead of a jettison vent downstream from the main tank (at the lower "keel" and just forward of the shell joint seam); thereby both tanks are made empty in short order. Similar to how the pressure system works on some biz jets (Falcon 20 for one). For redundant seal protection, a manual valve is in front of the "fuse". Of course the dump handle is brite red, positive lockout, and placard indicated for it's use.  

 Once the decision is made to offload the benzine, there is for sure a dead stick landing on the way; but by that time PIC already has the chosen off field (or possibly with luck, an airport..) parking place.   

 Most of you guys know that I was very involved in the Engineering side of the 777 and 747 flammability program (affected all airliner new build fleets in all Nations from 2004 and on, not just America) and from that I learned a lot about what can be done under our cowling as well. 

 Not much weight or vast amounts of money to upgrade..and all of the mods are well known and tested to be effective. Just having the mental margin that you'd have a very good chance at surviving an in flight fire makes it worth the time and cost.

 There is no such thing as flight safety...but there is such a thing as risk management. As pilots, all of us (should) have training to back us up but if the airplane doesn't give us a chance to use it we would still end up taking a dirt nap needlessly.  

 After many millions in testing at the lazy B we made the grade by using Conolite and stainless or titanium details at all "penetrations". Also by capturing the joints (such as the IML of the cowling to the added Conolite firewall buffer) with cheap and lite fiberglass single adhesive tape (use 2" or 3" wide) under the panel attach fasteners, the structural elements are buffered from the heat once the tape adhesive gives up (about .5 seconds!). The fiberglass tape then "pillows" and an air pocket develops..so effective insulation happens at the joints automatically.  

 Using stainless steel screws and 1/2" long standoff tubes the thin Conolite sheet leaves a 1/2" air pocket from the original .025" thick stainless firewall, same thing happens with the Conolite, the resin boils out quickly and the fiberglass cloth remaining becomes effective flame block and insulation automatically. Because the fiberglass tape is on the inside of the cowling joints the fire cannot escape the aft cowling area junction at the fuselage. 

 Discharge a small Kidde foam fire extinguisher through nozzles located under the cowling and an oil fire no longer becomes a bad story for General Aviation aircraft on the 6 o'clock news. I have one in my Capella..it doesn't weigh much at all. 

Vern