Compare wind speeds with the same units. For example, a wind speed of 6.5 MPH is slower than a wind speed of 6 knots, because 6.5 MPH is equivalent to 6.5/1.15 = 5.7 KTS, which is less than 6 knots. References Military Factory: Convert kts to mph NASA: Knots versus Miles per Hour ...
So, if a cruise ship is sailing at a speed of 21 knots, you might compare that to roughly 24 mph. A cruise ship can typically reach a speed of around 30 knots, about two to three knots higher than its cruising speed, but it’s not likely to go that fast. Cruise ships rarely ...
Calf pain when running doesn’t just go away on its own (usually). You need to take steps to address the tightness or soreness to accelerate the recovery process and prevent future injury. We’ve got a couple of ideas: Grab a kettlebell. Sit it on the ground, in front of you with t...
If we look at the wing of a typical small plane, which has a top surface that is 1.5 - 2.5% longer than the bottom, we discover that a Cessna 172 would have to fly at over 400 mph to generate enough lift. Clearly, something in this description of lift is flawed. But, who says t...
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Delta Q – built by Gordon Haslam, Portland, OR, 85 hp Merc – 20 mph DOUBLE EAGLE Double Eagle: We accumulated 2836 hrs. over a 9 year peroid on the first engine which was a OMC Cobra. It performed well but the OMC does not compare to the Mercruiser 4.3 LXH that is in there now...
Why does the air move faster over the top, and for that matter, how do we know how much downwash is produced? It turns out, these two questions are related, and also why lift is incorrectly explained so often. It also turns out that the answer to this question is extraordinarily compli...