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Discussion Starter #1 (Edited)
Although I like my mowers green, that's just a color. So, I've been thinking I need to get green and balance my LB two stroke carbon footprint.

Notice the fully function aerodynamic shroud that focuses lower intestinal emissions towards your nose in celebration of being green!
 

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I suppose it would be a great machine for someone that had a very small yard in the city, but if I am going to mow, I want to hear the roar of the brute power coming from that massive 2-stroke or 4 stroke powerhouse as I proudly display my operational finesse while I manicure the lawn.
 

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^^^^^^^^^^^^^^^^^
What Brad said!!
:bannana::cool:
 

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I think there's a real benefit to having an electric mower. Say it's 7am on Sunday morning and I feel like mowing. Normally I would have to wait until around 9:30 or 10. With an electric mower, I can go mow. I like it!
 

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Discussion Starter #5
There are a lot of electrics and battery powered mowers for sale around here. People think that by buying a non-combustion alternative that they are doing something for the environment.

Unfortunately, these electric mowers don't do the job on thick St. A around here so they end up selling them because they don't do the job. If you cut every three days, they work well.
 

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I think there's a real benefit to having an electric mower. Say it's 7am on Sunday morning and I feel like mowing. Normally I would have to wait until around 9:30 or 10. With an electric mower, I can go mow. I like it!
Uuhhhmmm....I start at 8:00, I figure its payback for the kids in the rent house across the street who came home LOUDLY at 4:00. I then proceed to wind up the blower at WOT. :trink40:

~ TSA
 

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Discussion Starter #7
Uuhhhmmm....I start at 8:00, I figure its payback for the kids in the rent house across the street who came home LOUDLY at 4:00. I then proceed to wind up the blower at WOT. :trink40:

~ TSA
Everyone needs a Honda HR17 to cut early! They are very quiet for a gas powered lawn mower.

Normally, the grass is too wet around here too mow in the morning! I don't like all the grass sticking to everything.
 

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I just love the "green" movement people forget that it took energy and lots of it to make those toxic batteries. What about the electricity that is used to run them or charge them??? Where do you think that comes from??? COAL! Electricity just doesnt appear in your home. Its funny how people think.
 

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Another thing to keep in mind is that the engine is only part of the noise quotient. The electric mower's cooling fan and blade will most likely be audible to your neighbor.
 

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Originally Posted by Two-StrokerAce View Post
Uuhhhmmm....I start at 8:00, I figure its payback for the kids in the rent house across the street who came home LOUDLY at 4:00. I then proceed to wind up the blower at WOT.



absofrikin tively. maybe get one of those"hot"saws from timber sports & rev the **** out of it under thier window,.
muhuhhahahah

when i get woken or kept up by neighbors, i fire up the fleet all at once :)
 

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I have one battery-powered electric mower in my collection. Run time per battery charge is inadequate for an extended run. Or should I say batteries recharge since this one was designed with two small 12-volt batteries to develop 24 volts allowing use of a 24-volt electric motor, which higher-voltage motors are generally more efficient than lower-voltage motors.

Conventional horizontally rotating mower blades have lousy cutting efficiency per watt-hour. Higher capacity batteries and even higher voltage battery packs like 36V and 48V, allowing use of even more efficient motors, are possible design paths to improve that. Even the little, low-production special purpose "deep cycle" batteries found in most electric mowers are poor buys compared to much larger "deep-cycle" batteries widely sold and used to power marine electric drives. But those larger batteries are quite heavy, which makes their use in push mowers a "mixed bag" of costs and benefits. Vehicle designers have known for over 100 years that taller tires consume less energy when rolling over uneven terrain. That applies to mowers as well, especially those which are heavy.

The range of DC motor efficiency values is wide, running from over 90% down to about 70%. Permanent magnet motors, are typically more efficient than motors which depend on input electrical power to create one side of the magnetic pull-pairs which spin motors. While permanent magnet motors were once much more expensive than brush-type DC motors, their expensive magnets have become cheaper while cost of copper, used in motor windings, increased. So PM DC motors cost/benefit ratio has become more competitive. Lots of clever people have been working on developing better-performing DC-motor electronic controls. A few years ago, we might just called those devices "speed controls," but with clever feedback sensing designs, rotor positioning is being interpreted by back-electro-motive-force WITHOUT even requiring a separate position-sensing feedback circuit! That's REALLY clever design work. So some of the new DC motors can maintain motor rpm despite unpredictable driven loads, much as "cruise controls" do in road vehicles.

Others may find what I'm about to say unlikely. But I expect one of the biggest breakthroughs enabling extended run time with battery-powered mowers will come from more energy-efficient blade design. I won't expand on that right now as I'm one of those involved in that design work.

Fueling gasoline and diesel powered mowers occurs in smaller, less economically painful steps. Replacing a push mower's battery set for $75 or more has seemed like a "deal breaker" to many electric mower owners. Electric recharging cost is pennies. That's not the cost that bites. Replacing expensive batteries bites. If you want to prevent batteries from turning to junk when not used during extended non-growing seasons (in the north where grass doesn't grow every month), you should invest in and use a battery-desulfating pulse-type charge maintainer. I'm just guessing, but I'd be surprised if more than 1 in 50 electric mower owners do that. So their batteries fail from sulfation and extended internal-loss discharge during their non-use periods. Reading forum discussions by battery-powered mower owners clearly indicates that most of them experience lousy battery life, most commonly related to failure to maintain those batteries during the "off season."

As usual with me, I've written more than most of you wanted to hear. If your attention span can't be sustained much longer than reading bumper sticker-length messages, it would be best to ignore my posts.
John
 

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My neighbor used to use a corded electric mower, and I would swear it was as loud as a gas one. Certainly not quiet by any means. Now she hires a lawn service that uses a big, heavy Toro commercial :)

Wolfy has a good point about the batteries. You're not allowed to dispose of them ANYWHERE. All that does is encourage people to toss them anywhere just to get rid of them.
 

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If you have a 10' x 10' yard the electric mowers MIGHT be reasonable... but otherwise their stupid. Just think all the gasses the batteries emit, and all the energy that you are using to charge them after you cut for 10 min. Just stick with the good ole gas mowers. There is a reason there still around. And cut grass whenever you want. THe neighbors can get over it.:thThumbsU
 

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I think there's a real benefit to having an electric mower. Say it's 7am on Sunday morning and I feel like mowing. Normally I would have to wait until around 9:30 or 10. With an electric mower, I can go mow. I like it!

My neighbor across the street is a green (in his mind) tree hugging liberal and I cringed when he traded in his nice alum deck Toro for an electric mower. I have to say that electric mower is darn near as loud as my JD.
 

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My neighbor across the street is a green (in his mind) tree hugging liberal and I cringed when he traded in his nice alum deck Toro for an electric mower. I have to say that electric mower is darn near as loud as my JD.
if the JD has a kawasaki on it...thats not loud at all!
 

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Discussion Starter #16
I have one battery-powered electric mower in my collection. Run time per battery charge is inadequate for an extended run. Or should I say batteries recharge since this one was designed with two small 12-volt batteries to develop 24 volts allowing use of a 24-volt electric motor, which higher-voltage motors are generally more efficient than lower-voltage motors.

Conventional horizontally rotating mower blades have lousy cutting efficiency per watt-hour. Higher capacity batteries and even higher voltage battery packs like 36V and 48V, allowing use of even more efficient motors, are possible design paths to improve that. Even the little, low-production special purpose "deep cycle" batteries found in most electric mowers are poor buys compared to much larger "deep-cycle" batteries widely sold and used to power marine electric drives. But those larger batteries are quite heavy, which makes their use in push mowers a "mixed bag" of costs and benefits. Vehicle designers have known for over 100 years that taller tires consume less energy when rolling over uneven terrain. That applies to mowers as well, especially those which are heavy.

The range of DC motor efficiency values is wide, running from over 90% down to about 70%. Permanent magnet motors, are typically more efficient than motors which depend on input electrical power to create one side of the magnetic pull-pairs which spin motors. While permanent magnet motors were once much more expensive than brush-type DC motors, their expensive magnets have become cheaper while cost of copper, used in motor windings, increased. So PM DC motors cost/benefit ratio has become more competitive. Lots of clever people have been working on developing better-performing DC-motor electronic controls. A few years ago, we might just called those devices "speed controls," but with clever feedback sensing designs, rotor positioning is being interpreted by back-electro-motive-force WITHOUT even requiring a separate position-sensing feedback circuit! That's REALLY clever design work. So some of the new DC motors can maintain motor rpm despite unpredictable driven loads, much as "cruise controls" do in road vehicles.

Others may find what I'm about to say unlikely. But I expect one of the biggest breakthroughs enabling extended run time with battery-powered mowers will come from more energy-efficient blade design. I won't expand on that right now as I'm one of those involved in that design work.

Fueling gasoline and diesel powered mowers occurs in smaller, less economically painful steps. Replacing a push mower's battery set for $75 or more has seemed like a "deal breaker" to many electric mower owners. Electric recharging cost is pennies. That's not the cost that bites. Replacing expensive batteries bites. If you want to prevent batteries from turning to junk when not used during extended non-growing seasons (in the north where grass doesn't grow every month), you should invest in and use a battery-desulfating pulse-type charge maintainer. I'm just guessing, but I'd be surprised if more than 1 in 50 electric mower owners do that. So their batteries fail from sulfation and extended internal-loss discharge during their non-use periods. Reading forum discussions by battery-powered mower owners clearly indicates that most of them experience lousy battery life, most commonly related to failure to maintain those batteries during the "off season."

As usual with me, I've written more than most of you wanted to hear. If your attention span can't be sustained much longer than reading bumper sticker-length messages, it would be best to ignore my posts.
John
Thanks so much for the full explanation. I like the part about on demand power.
 
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