My mental scheme is like a rapidly oscillating object that at first appears blurred, but, as it slows, acquires sharper outlines and at last halts in place.
The most suitable location for the heat exchanger seems to be on top of the present induction air box, rotated so that the aft inboard corner touches the firewall while the aft outboard edge is about an inch and a half from it.
I remember, during the construction of Melmoth 1, intensely visualizing the retraction linkage for the main landing gear while meditating at the Cimarron Zen Center of Rinzai-ji. It must be easy to remove, with as few attachment points as possible, and have short, direct flow paths.
It must require moving or damaging as few existing items as possible.
I seldom cruise lower than that -- more usually above 10,000 feet.
A turbonormalized Bonanza has a ram air intake about 3 or 3.5 inches in diameter, but unless the velocity ratio in the duct happens to be 1.0, that tells me little about the actual mass flow.I recorded induction air temperature at 20, 25 and 30 in. I had intended to finish the series at 16,000 feet, but it became apparent that the temperatures were getting quite high and I did not want to venture past 200 deg. The astute viewer will wonder why the temperature rise is so large even at low manifold pressure and low altitude, where no compression at all should be taking place.The reason is the peculiar design of the Piper "fixed wastegate" system that I have modified to incorporate a manually adjustable wastegate.My seemingly successful installation of a new battery in the #1 Lowrance has resulted in a unit that remembers its settings, but refuses to lock onto a satellite, even though it passes its self-tests okay.Meanwhile, the #2 unit, which is currently installed in the airplane, has developed a new problem: it remains on for only a few seconds after startup, and then turns off.
One question on my mind was whether I needed to provide a separate cold air intake for the intercooler, rather than use the air already in the "cold" plenum.