You do not have to dust anything off, the temp gauge will tell you soon enough. I believe this is true whether it is a space shuttle or a replica or a semi-replica in between. Looking back at the original post here, and everything since, my one and only point was that any mesh with 1/4" holes will not flow well. And adding a bigger fan is still asking it to suck a milkshake through a straw. It also does not matter to me if it is made as an exact copy or chicken wire, just use a mesh large enough to flow, 78% is not always 78%. I learned that the hard way, just trying to pass it along. At the risk of getting my head chopped off again, I have a second suggestion. I used that reference since we were talking about chicken wire. Someone purchase one $170 Ebay grille, scan it and also reverse image the scan. Now spend a few bucks in material and 3-D print the plastic grilles. Sell a few copies at a reasonable price and make enough on this one project to pay for the $999 desktop printer. I will donate the scan time. I would do this myself but since the printer demo last week and seeing how Boeing is using this to print Titanium engine rotors, and realizing that printing a complete chassis is doable with no joints and no labor, I am focused on a larger machine. A fringe benefit is that this also solves the debate on this thread about accurate or close.
