Date: August 24th, 2018 8:26 AM
Author: an entire campus of indelibles hippopotami
this is addressed (by me) in another thread.
here's a helpful link: http://www.xoxohth.com/thread.php?thread_id=3681375&mc=36&forum_id=2
refractory period for a stallion can be short (hence its characterization as synonymous with virility), having been observed at as little as 7 minutes. Under an assumption that we are able to select proven, virile stallions, we can somewhat conservatively assume a 10 minute refractory period to account for an inevitable slow-down after multiple ejaculations. Thus, a virile stallion with appropriate stimulation could be counted on for likely no more than 6 ejaculations. (source available: https://research.vet.upenn.edu/Portals/49/86ReprodU.pdf )
According to Colorado State University horse semen collection program's published findings, average semen amount for a typical horse ejaculation is about 70 mililiters which equates to about 14.2 teaspoons. Doubtless this will decrease over multiple ejaculations in a short time. however studies have consistently shown that high level of arousal has a large effect on semen volume. Given highly trained professionals and appropriate tools (high quality stimulus mares, appropriate hydration) the decrease could at least be minimized. We will assume a significant but not overwhelming decrease of %20 volume by average from the typical horse ejaculation to arrive at an average ejaculation volume of 11.4 teaspoons per ejaculation. Thus, at high efficiency a trained, serviced stallion could be counted on for 68.4 teaspoons of semen per hour. This indicates a need for 67.3 horses (at leat) to produce 1 gallon of semen in an hour.
An olympic swimming pool requires around 660,000 gallons of fluid to be filled. Thus you would need around 44,418,000 stallions to fill an olympic pool in an hour.
But this ignores the logistical impracticality that would make any such attempt outlandish.
to add to this, the world horse population was estimated at 58 million in 2007.
only half those would be male, meaning 29 million. Given my estimate of 44 million highly virile stallions needed to fill an olympic pool in an hour, this is absolutely impossible.
A more interesting question would be how long would it take all the horses in the world to fill an olympic pool with ejaculate.