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Failed to connect to MySQL: (1203) User howardkn already has more than 'max_user_connections' active connectionsPath: ...!eternal-september.org!feeder3.eternal-september.org!news.eternal-september.org!eternal-september.org!.POSTED!not-for-mail From: Frank Krygowski Newsgroups: rec.bicycles.tech Subject: Re: rec tech mower Date: Wed, 16 Apr 2025 11:26:58 -0400 Organization: A noiseless patient Spider Lines: 17 Message-ID: References: <6ubjvj9j6ipv60svn0sup8ks45ha9nluj1@4ax.com> <9cbuvj99d1obea6n7h7majb42purveqpk2@4ax.com> Reply-To: frkrygow@gmail.com MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8; format=flowed Content-Transfer-Encoding: 7bit Injection-Date: Wed, 16 Apr 2025 17:26:59 +0200 (CEST) Injection-Info: dont-email.me; posting-host="88b8371a7324c29b38c1502a67d88cbc"; logging-data="2582751"; mail-complaints-to="abuse@eternal-september.org"; posting-account="U2FsdGVkX18rNhGYLL2F+9p5qjAzNWP3l22wZFdxUR4=" User-Agent: Mozilla Thunderbird Cancel-Lock: sha1:4YscY8NpEBoJprC/VdogdZs9qyI= Content-Language: en-US In-Reply-To: Bytes: 2142 On 4/16/2025 5:28 AM, John B. wrote: > > Why all this worry about electric mowers? Get a liquid fuel mower and > build a proper exhaust system so it's quit :-) Long ago in some engineering forum one guy described modifying his mower's exhaust system, mostly by adapting a far larger muffler. But the engine exhaust is only part of the noise from a typical mower. Much of the noise is generated aerodynamically by the 21" or 22" blade whirling around in a sort of echo chamber beneath the engine. Many electric mowers use much smaller blades, eliminating most of that noise. Mammotion's mowers https://us.mammotion.com/ use discs that carry little razor blades on their periphery. -- - Frank Krygowski