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Old 13th September 2013, 12:34 AM   #114945  /  #1
Adenosine
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Steampunk insect

http://www.popularmechanics.com/_mob...lick=pm_latest

A set of gears had been found in body of a jumping insect. The tiny gears are believed to enable synchronicity between both legs when the animal accelerated to 400g at takeoff.
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Old 13th September 2013, 02:23 AM   #114948  /  #2
borealis
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That was fascinating.

Planthoppers are a favourite insect of mine, so much variation, weird little things.
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Old 13th September 2013, 03:18 AM   #114951  /  #3
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So cool.
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Old 25th May 2015, 03:17 PM   #246031  /  #4
Zeluvia
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What is it with Aden and Insect threads?

Can't he just derail things like the rest of us?
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Old 25th May 2015, 04:35 PM   #246040  /  #5
Dionysus
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Not quite happy with the maths here. The article claims that top speed is 8 mph which since this is a ballistic problem must occur no later than the creature's legs losing contact with the substrate surface. It also claims that the creature launches itself in a time of 2 ms. Then using the equation of motion

v = u + at ... (1)

where v is final velocity, u is initial velocity, a is acceleration and t is time.
Converting to SI units we have v = 3.58 m/s (8 mph), u = 0 m/s, and t = 2 ms.

Rearranging equation (1) gives a = (v - u)/t, a = (3.58 - 0)/0.002, a = 1788 m/s2.

Using a value for the acceleration due to gravity at the Earth's surface of 9.81 m/s2 yields an acceleration value expressed in g of a/g = 1788/9.81 = 182.28.

The article quoted value of ~ 400 g appears to be exaggerated by a factor of ~ 2.
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Old 25th May 2015, 04:39 PM   #246041  /  #6
Carlsson
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god knew what he was doing that day
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Old 25th May 2015, 04:53 PM   #246051  /  #7
borealis
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And this day?



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Old 25th May 2015, 04:54 PM   #246054  /  #8
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Old 26th May 2015, 01:49 AM   #246263  /  #9
Majiffy
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Quote:
Originally Posted by borealis View Post
And this day?
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Old 26th May 2015, 01:51 AM   #246267  /  #10
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wait, that's not you
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