Re: rec tech mower

On 4/16/2025 10:26 AM, Frank Krygowski wrote:

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.
 

Hmmm.  Nice McGuffin for a murder mystery.
--
Andrew Muzi
am@yellowjersey.org
Open every day since 1 April, 1971