I think this may have been stated before, but if you are a KRnetter that doesn?t monitor the Corvair list as well, you may be missing a lot of excellent reading, applicable to your KR building as well. William Wynne did an excellent job of posting a post-accident report of a recent CH750 accident. The following paragraph was taken from the report:
?A very important consideration looking at this photo: This is visual evidence of why you never want to use a hard aluminum line on the floorboard of an aircraft. The rubber hose that came with the kit was utilized to run from the fuel valve to the firewall pass-through. In several places it was pinched very tight between the distorted sheet-metal. Had it been a standard piece of 5052 aluminum tubing, I am sure it would have ruptured. If there had been fuel in the tanks in an accident where the aircraft remained upright, this leak would have poured fuel into the damaged cockpit. It is far more desirable to have a flexible line, preferably a braided steel one, in this location where a distorted floor from an accident would rupture a rigid line?. Quite a few KRs have aluminum tubing carrying fuel near or on the floorboard. If you are at this particular building stage, it?s worthy of consideration. Ed J.