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power_of_evolution:evolution_engineering_comparison:energy_efficiency_of_wright_model_b [2022/09/21 07:37] (current)
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| | ====== Energy efficiency of Wright model B ====== |
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| | // Published 05 November, 2020; last updated 10 December, 2020 // |
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| | <HTML> |
| | <p>The Wright model B:</p> |
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| | <ul> |
| | <li><div class="li">flew around 0.10—0.21m/kJ</div></li> |
| | <li><div class="li">and moved mass at around 0.036 – 0.12 kg.m/J</div></li> |
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| | ===== Details ===== |
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| | <p>The <em>Wright Model B</em> was a 1910 plane developed by the Wright Brothers.<span class="easy-footnote-margin-adjust" id="easy-footnote-1-2731"></span><span class="easy-footnote"><a href="#easy-footnote-bottom-1-2731" title='&#8220;The&nbsp;<strong>Wright Model B</strong>&nbsp;was an early&nbsp;<a href="https://en.wikipedia.org/wiki/Pusher_configuration">pusher</a>&nbsp;biplane designed by the&nbsp;<a href="https://en.wikipedia.org/wiki/Wright_brothers">Wright brothers</a>&nbsp;in the United States in 1910. It was the first of their designs to be built in quantity.&nbsp;&#8220;</p> <p>“Wright Model B.” In <em>Wikipedia</em>, September 16, 2020. <a href="https://en.wikipedia.org/w/index.php?title=Wright_Model_B&amp;oldid=978792334">https://en.wikipedia.org/w/index.php?title=Wright_Model_B&amp;oldid=978792334</a>.'><sup>1</sup></a></span></p> |
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| | ==== Mass ==== |
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| | <p>According to Wikipedia<span class="easy-footnote-margin-adjust" id="easy-footnote-2-2731"></span><span class="easy-footnote"><a href="#easy-footnote-bottom-2-2731" title='“Wright Model B.” In <em>Wikipedia</em>, September 16, 2020. <a href="https://en.wikipedia.org/w/index.php?title=Wright_Model_B&amp;oldid=978792334">https://en.wikipedia.org/w/index.php?title=Wright_Model_B&amp;oldid=978792334</a>.'><sup>2</sup></a></span>:</p> |
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| | <ul> |
| | <li><div class="li"><strong>Empty weight:</strong> 800 lb (363 kg)</div></li> |
| | <li><div class="li"><strong>Gross weight:</strong> 1,250 lb (567 kg)</div></li> |
| | </ul> |
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| | <p>We use the range 363—567 kg, since we do not know at what weight in that range the relevant speeds were measured.</p> |
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| | ==== Energy use per second ==== |
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| | <p>From Wikipedia, we have<span class="easy-footnote-margin-adjust" id="easy-footnote-3-2731"></span><span class="easy-footnote"><a href="#easy-footnote-bottom-3-2731" title='“Wright Model B.” In <em>Wikipedia</em>, September 16, 2020. <a href="https://en.wikipedia.org/w/index.php?title=Wright_Model_B&amp;oldid=978792334">https://en.wikipedia.org/w/index.php?title=Wright_Model_B&amp;oldid=978792334</a>.'><sup>3</sup></a></span>:</p> |
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| | <ul> |
| | <li><div class="li"><strong>Power:</strong> 35 horsepower = 26kW</div></li> |
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| | <strong>Efficiency of use of energy from fuel:</strong> we could not find data on this, so use an estimate of 15%-30%, based on what we know about the <a href="/doku.php?id=power_of_evolution:evolution_engineering_comparison:energy_efficiency_of_wright_flyer#Efficiency_of_energy_conversion_from_fuel_to_motor_power">energy efficiency of the Wright Flyer</a>. |
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| | <p>From these we can calculate:</p> |
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| | <p>Energy use per second<br/> |
| | = power of engine x 1/efficiency in converting energy to engine power<br/> |
| | = 26kJ/s / .15—26kJ/s / .30<br/> |
| | = 86.6—173 kJ/s</p> |
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| | ==== Distance per second ==== |
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| | <p>Wikipedia gives us<span class="easy-footnote-margin-adjust" id="easy-footnote-4-2731"></span><span class="easy-footnote"><a href="#easy-footnote-bottom-4-2731" title='“Wright Model B.” In <em>Wikipedia</em>, September 16, 2020. <a href="https://en.wikipedia.org/w/index.php?title=Wright_Model_B&amp;oldid=978792334">https://en.wikipedia.org/w/index.php?title=Wright_Model_B&amp;oldid=978792334</a>.'><sup>4</sup></a></span>:</p> |
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| | <ul> |
| | <li><div class="li"><strong>Maximum speed:</strong> 45 mph (72 km/h, 39 kn)</div></li> |
| | <li><div class="li"><strong>Cruise speed:</strong> 40 mph (64 km/h, 35 kn)</div></li> |
| | </ul> |
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| | <p>We use the cruise speed, as it seems more likely to represent speed achieved with the energy usages reported.</p> |
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| | ==== Distance per Joule ==== |
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| | <p>We now have (from above):</p> |
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| | <ul> |
| | <li><div class="li">speed = 40miles/h = 17.9m/s</div></li> |
| | <li><div class="li">energy use = 86.6—173 kJ/s</div></li> |
| | </ul> |
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| | <p>Thus, on average each second the plane flies 17.9m and uses 86.6—173 kJ, for 0.10—0.21m/kJ.</p> |
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| | ==== Mass.distance per Joule ==== |
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| | <p>We have:</p> |
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| | <ul> |
| | <li><div class="li">Distance per kilojoule: 0.10—0.21m/kJ</div></li> |
| | <li><div class="li">Mass: 363—567kg</div></li> |
| | </ul> |
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| | <p>This gives us a range of 0.036 – 0.12 kg.m/J</p> |
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| | <p><br/> |
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| | <em>Primary author: Ronny Fernandez</em></p> |
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| | ===== Notes ===== |
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| | <ol class="easy-footnotes-wrapper"> |
| | <li><div class="li"> |
| | <span class="easy-footnote-margin-adjust" id="easy-footnote-bottom-1-2731"></span>“The <strong>Wright Model B</strong> was an early <a href="https://en.wikipedia.org/wiki/Pusher_configuration">pusher</a> biplane designed by the <a href="https://en.wikipedia.org/wiki/Wright_brothers">Wright brothers</a> in the United States in 1910. It was the first of their designs to be built in quantity. “ |
| | <p>“Wright Model B.” In <em>Wikipedia</em>, September 16, 2020. <a href="https://en.wikipedia.org/w/index.php?title=Wright_Model_B&oldid=978792334">https://en.wikipedia.org/w/index.php?title=Wright_Model_B&oldid=978792334</a>.<a class="easy-footnote-to-top" href="#easy-footnote-1-2731"></a></p> |
| | </div></li> |
| | <li><div class="li"> |
| | <span class="easy-footnote-margin-adjust" id="easy-footnote-bottom-2-2731"></span>“Wright Model B.” In <em>Wikipedia</em>, September 16, 2020. <a href="https://en.wikipedia.org/w/index.php?title=Wright_Model_B&oldid=978792334">https://en.wikipedia.org/w/index.php?title=Wright_Model_B&oldid=978792334</a>.<a class="easy-footnote-to-top" href="#easy-footnote-2-2731"></a> |
| | </div></li> |
| | <li><div class="li"> |
| | <span class="easy-footnote-margin-adjust" id="easy-footnote-bottom-3-2731"></span>“Wright Model B.” In <em>Wikipedia</em>, September 16, 2020. <a href="https://en.wikipedia.org/w/index.php?title=Wright_Model_B&oldid=978792334">https://en.wikipedia.org/w/index.php?title=Wright_Model_B&oldid=978792334</a>.<a class="easy-footnote-to-top" href="#easy-footnote-3-2731"></a> |
| | </div></li> |
| | <li><div class="li"> |
| | <span class="easy-footnote-margin-adjust" id="easy-footnote-bottom-4-2731"></span>“Wright Model B.” In <em>Wikipedia</em>, September 16, 2020. <a href="https://en.wikipedia.org/w/index.php?title=Wright_Model_B&oldid=978792334">https://en.wikipedia.org/w/index.php?title=Wright_Model_B&oldid=978792334</a>.<a class="easy-footnote-to-top" href="#easy-footnote-4-2731"></a> |
| | </div></li> |
| | </ol> |
| | </HTML> |
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