I'm looking at building a jockey box with a 70', 5/16" (21.3m, 8mm) stainless steel coil (installed in a drum-style cooler.) Seems to be a good compromise between size, weight and cost.
How quickly can I pull cold beer out of it without it foaming?
My back-of-envelope calculation says a 2133.6cm by 0.8cm coil holds π × 0.42 × 2133.6 = 10723 or just over a litre of beer. The Mythbusters say you can cool a six pack of beer in five minutes with salted ice water, so I'd interpolate that one beer per minute would be achievable.
Can anyone confirm my theory with experimental evidence?