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From: Jeff Liebermann <jeffl@cruzio.com>
Newsgroups: rec.bicycles.tech
Subject: Re: rec tech mower
Date: Thu, 17 Apr 2025 12:28:33 -0700
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On Wed, 16 Apr 2025 14:35:28 -0400, Zen Cycle <funkmaster@hotmail.com>
wrote:

>On 4/16/2025 12:24 PM, Jeff Liebermann wrote:
>> On Wed, 16 Apr 2025 16:28:37 +0700, John B. <slocombjb@gmail.com>
>> wrote:
>> 
>>> Why all this worry about electric mowers?
>> 
>> Because the new and improved technology might save us from global
>> warming.  At least that's the official theory.
>> 
>>> Get a liquid fuel mower and
>>> build a proper exhaust system so it's quit :-)
>> 
>> Well, if you're not happy with gas or electric, perhaps renting a
>> tethered goat to mow the lawn might be better.  Goats are
>> environmentally correct and fertilizes the lawn.
>> 
>> "Using Goats as Lawn Mowers"
>> <https://www.youtube.com/watch?v=zMJEuAgJ-sU>  (1:52)
>> 
>> "Can A GOAT Replace Your LAWNMOWER?"
>> <https://www.youtube.com/watch?v=ZKzn8Ho9UgY>  (4:46)
>> 
>> "From 1999: Goats as lawn mowers"
>> <https://www.youtube.com/watch?v=9HA7cqsh3YQ>  (7:10)

>Or, more in line with this forum:
>https://www.pinterest.com/pin/428756827016267953/

Nice.  I spent an hour browsing the photos.  Most are very creative
and interesting.  Very few might work as a usable lawn mower.  

The problem problem with the human powered bicycle lawn mower is the
lack of power.  The typical small pusher type motorized lawn mower
uses a 2 to 5 horsepower engine.  1 watt = 0.00134102 mechanical
horsepower.  A rather mediocre cyclist can produce about 150 watts
without much difficulty.  Therefore, this cyclist can produce:
   150 * 0.00134 = 0.2 hp
That's not enough to produce the same HP as even the smallest lawn
mower engine.

I once tried a bicycle to lawnmower conversion.  There was far too
much friction for me to ride it effectively.  I rode on a not very
flat lawn for about 100ft and gave up.

-- 
Jeff Liebermann                 jeffl@cruzio.com
PO Box 272      http://www.LearnByDestroying.com
Ben Lomond CA 95005-0272
Skype: JeffLiebermann      AE6KS    831-336-2558