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Robert DiGiovanni

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Articles by Robert DiGiovanni

Marine Mammal Stranding Networks in the 21st Century: Whence and Whither?

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By Other causes, Regina Asmutis-Silvia, Jeff Boehm, Robert DiGiovanni
| Wiley Online Library Verified
1 A Rich History of Stranding Network Development Marine mammals stranded ashore have captured human attention for centuries—Aristotle observed over 2000 years ago that dolphins sometimes came ashore for unknown reasons. Indigenous coastal communities from New Zealand to the Arctic have oral histories documenting stranding events (Marsh et al. 2022) and dramatic scenes of dead whales swarmed over by a curious public were recorded by 16th-century Dutch painters (Figure 1).
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If a balloon lies within gun range, why would a 21st century warplane shoot it with a missile, instead of rotary guns?

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By Robert DiGiovanni
| aviation.stackexchange.com
Aside from the (good) answer that, because of lifting gas at the same pressure might only slowly vent through even numerous bullet holes, leading to a potentially slow uncontrolled descent through air traffic lanes, one might be a bit disappointed by a lack of creativity in the response to a drifting balloon. A rigid airship, like the Zeppelin/Goodyear blimps could be modified for stratospheric flight with external expanding balloons. Pilots would wear SR-71/astronaut type suits.
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aerobatics - What G forces does a pilot perceive in a "1 G" barrel roll? - Aviation Stack Exchange

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By john k, Robert DiGiovanni
| aviation.stackexchange.com
By common terminology, when we speak of an "X G manuever" (say X=1 so a "1 G maneuver"), we mean that 1 G is the up-and-down acceleration indicated on the G-meter on the panel, and it also is the up-and-down acceleration (force per unit mass) acting to create stresses or strains on the aircraft's structure (and the pilot's body.) In other words, it is the "felt" acceleration or force per unit mass, or at least the up-and-down component thereof, in the pilot's reference frame.
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