Timeline for Does anyone build 100k RPM alternators?
Current License: CC BY-SA 3.0
14 events
| when toggle format | what | by | license | comment | |
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| Dec 29, 2013 at 17:36 | answer | added | Joaquin | timeline score: 3 | |
| Oct 2, 2013 at 17:39 | comment | added | BCS |
For low flight speed applications jet engines are not very efficient as they throw too little mass (F~dm*dv, P~dm*dv^2) which is why turbo-props and turbo-fans are used. -- For a quad-rotor the alternatives become mechanical reduction gears, shafts and variable pitch rotors or high-speed alternator + conventional motor/controller.
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| Oct 2, 2013 at 12:08 | comment | added | pjc50 | If you're wanting to build a (large!) quadrotor, surely the most efficient is not turbine -> electricity -> motor -> thrust, but use the turbines for vertical thrust directly? | |
| Oct 2, 2013 at 11:43 | answer | added | John U | timeline score: 0 | |
| Oct 2, 2013 at 8:09 | answer | added | user36129 | timeline score: 0 | |
| Oct 2, 2013 at 6:55 | answer | added | oakad | timeline score: 4 | |
| Dec 7, 2012 at 10:11 | answer | added | taha abdelhameed | timeline score: 1 | |
| Nov 18, 2012 at 4:29 | history | edited | BCS | CC BY-SA 3.0 |
edited body
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| Nov 17, 2012 at 18:30 | vote | accept | BCS | ||
| Nov 17, 2012 at 18:28 | history | edited | BCS | CC BY-SA 3.0 |
added 217 characters in body
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| Nov 17, 2012 at 18:01 | answer | added | HikeOnPast | timeline score: 1 | |
| Nov 17, 2012 at 6:19 | answer | added | D.A.S. | timeline score: -1 | |
| Nov 17, 2012 at 3:37 | review | Close votes | |||
| Nov 18, 2012 at 15:21 | |||||
| Nov 17, 2012 at 3:13 | history | asked | BCS | CC BY-SA 3.0 |