Now kiddies, settle back in a comfy chair for Bluey’s scientific probe into the Human Fly affair (I’ll try to keep this simple for the benefit of our North American members)

Consider if you will (this is the way all we scientifically bent persons start off) the situation that Bounder posits: that the standard wing walker is subjected to an airspeed of approximately100 kts (indicated, of course); and that the Human Fly (HF) would be subjected to an airspeed of approximately 150 kts – DC8 flaps down. Now those amongst you with little knowledge of dynamic pressure theory might assume that there is a linear relationship in action here and that HF will merely be subjected to an increase in pressure of a gentle 50%.

BUT NOT SO!

According to Bluey’s Big Book of Dynamic Pressure (available in hard copy or downloadable from Amazon) the formula for dynamic pressure exerted on a body is as follows:

q = (p.U2*)/2 (*for U2 read U squared) where:

q = dynamic pressure in Pascals (whatever a pascal might be or feel like)

p = fluid density in kg/m3

U = flow speed in m/sec

Now using this formula; for the case of standard temperature and pressure (150C at sea level) for dry air (p=1.225 kg/m3), the dynamic pressure at 100 kts would be 1621.000504429031 pascals. Yet the dynamic pressure at 150 kts would be 3647.250662319451 pascals; an increase of approximately 2.25 times. This, of course is due to the fact that the flow speed is squared, resulting in a significant increase in dynamic pressure that would be felt across the body by the luckless HF.

Now you might just wonder how this would feel like in real terms. Well, Bluey has thought of the best way to demonstrate this:

Step 1: drop a Formula 1 engine into Bounder’s trusty Austin A30.

Step2: relocate same to Bonneville and load Chuffy’s chappies aboard.

Step 3: Bounder puts pedal to metal and A30 leaps to 100 kts (115.07795 mph)

Step 4: chappies wind down windows, put hands out and experience appropriate pascals for 100 kts

Step 5: reposition A30 at start point, mount 2 x JATO bottles on vehicle then:

Step 6: light up the bottles and repeat steps 3 and 4 to experience appropriate pascals for 150 kts (172.61692 mph), noting the significant increase in dynamic pressure.

But let’s get back to the Human Fly. I suspect that what he really craves is a tad more “q”.

So, Captain Clay Lacey, get them flaps up, firewall them thar throttles and go for max airspeed: 511 Knots, 42337.72099212832 pascals!

Muhahahahahahahahahahahahahahaha!