Deutsch   English   Français   Italiano  
<vtvi9jlcaqteedbj7rj5av6cn2vqna37as@4ax.com>

View for Bookmarking (what is this?)
Look up another Usenet article

Path: ...!Xl.tags.giganews.com!local-2.nntp.ord.giganews.com!nntp.supernews.com!news.supernews.com.POSTED!not-for-mail
NNTP-Posting-Date: Thu, 18 Jul 2024 20:49:45 +0000
From: john larkin <jlarkin_highland_tech>
Newsgroups: sci.electronics.design
Subject: Re: Solar powered electrostatic motor drone ??
Date: Thu, 18 Jul 2024 13:49:44 -0700
Message-ID: <vtvi9jlcaqteedbj7rj5av6cn2vqna37as@4ax.com>
References: <v7aa84$uec$1@solani.org> <v7an81$2bq7t$1@dont-email.me> <1qwwjrq.1j72zdkfee00kN%liz@poppyrecords.invalid.invalid> <v7bipr$2gsi9$1@dont-email.me> <86oi9j9sojojf8qinhranoclb3mpoaj5ag@4ax.com> <v7bq60$2i1n7$1@dont-email.me>
User-Agent: ForteAgent/8.00.32.1272
MIME-Version: 1.0
Content-Type: text/plain; charset=ISO-8859-1
Content-Transfer-Encoding: 8bit
Lines: 55
X-Trace: sv3-aWOWO+WmSvFBXPEnr9d44WJGSEG9WmMKvCTdm9ac68xIbwnw2KbFEN0d/YnLmNSGeXPEtW/KcP1YAc1!KnuzhVqEcieODwNhz/QxSk8GjSNFJdJD97vkSInX/4m9NJ+Hm5Vb+RhR/EML993p0bZSVRSpYPsA!Rd+wkA==
X-Complaints-To: www.supernews.com/docs/abuse.html
X-DMCA-Complaints-To: www.supernews.com/docs/dmca.html
X-Abuse-and-DMCA-Info: Please be sure to forward a copy of ALL headers
X-Abuse-and-DMCA-Info: Otherwise we will be unable to process your complaint properly
X-Postfilter: 1.3.40
Bytes: 3379

On Thu, 18 Jul 2024 21:27:19 +0200, Jeroen Belleman
<jeroen@nospam.please> wrote:

>On 7/18/24 20:39, john larkin wrote:
>> On Thu, 18 Jul 2024 19:21:23 +0200, Jeroen Belleman
>> <jeroen@nospam.please> wrote:
>> 
>>> On 7/18/24 18:42, Liz Tuddenham wrote:
>>>> Jeroen Belleman <jeroen@nospam.please> wrote:
>>>>
>>>>> On 7/18/24 07:46, Jan Panteltje wrote:
>>>>>> Researchers build ultralight drone that flies with onboard solar Bizarre
>>>>>> design uses a solar-powered motor that's optimized for weight.
>>>>>> https://arstechnica.com/science/2024/07/researchers-build-ultralight-dro
>>>>>> ne-that-flies-with-onboard-solar/
>>>>>>
>>>>>> Well, ehh, unlimited flight time if any sun..
>>>>>> Looks funny.
>>>>>> 4.5V to 9 kV power converter...
>>>>>
>>>>> I wonder if electrostatic motors would have been as practical
>>>>> as electromagnetic motors if the history of motor design had
>>>>> taken a different turn a century or two ago.
>>>>
>>>> I think Philips dabbled with them many decades ago.  A report will be
>>>> somewhere in the Philips Technical Review.
>>>>
>>>>
>>>
>>> Thanks for that hint. The Philips Technical Review is a treasure
>>> trove of interesting stuff.
>>>
>>> I found a paper by B. Boll�e on electrostatic motors:
>>> <https://pearl-hifi.com/06_Lit_Archive/02_PEARL_Arch/Vol_16/Sec_53/Philips_Tech_Review/PTechReview-30-1969-178.pdf>.
>>>
>>> Jeroen Belleman
>>>
>> 
>> I wonder how many orders of magnitude an electrostatic motor is worse
>> than a magnetic motor, in some criterion like power per volume or
>> power per dollar. 6 maybe?
>> 
>
>It's not so easy to tell. Electromagnetic motors have benefitted from
>a long and intense process of optimization, both for performance and
>for ease of manufacturing. Throwing some ballpark guesses at a possible
>realization of a 1kW electrostatic motor, I got a motor volume greater
>than an electromagnetic motor, to be sure, but not hugely so. One or
>two orders of magnitude perhaps. Certainly not six.
>
>Jeroen Belleman

One source says that "Benjamin Franklin invented the first
electrostatic motor in 1748."