Lithium technology by Makita/Dolmar

This is an interesting niche tool. If it's built well, Dolmar has a good name, it will stand on its own legs.

A twenty minute re-charge is amazing!

A small eye could be made in the battery and motor casing for small rings. Then a tether could be added to expedite sending a fresh battery up. This could be epoxied on afterwards too.

I wonder how long it will take to get out of the habit of burping the throttle of a gasser to keep the idle smooth?

Electric eliminates ambient weather differences too. No more cold starts or vapor locking. Tune ups are a thing of the past. Maybe cleaning the motor rotor but some aerosal cleaners that are already on the market should take care of that. There are LOTS of industrial motor applications that are more strenuous and dirty than tree work.

Speaking of Indy 500...have you ever heard what the turbine cars sounded like at Indy? More like an electric than a gasser.
 
DC motors have very high torque at low speeds but the stamina is the limiting factor in the wraptor application. The energy required to lift the average climber would mean a significantly large battery. Cutting while torque is necessary the energy requirement is lower. It's all about the joules.
 
um, actually no. The worm gear gives mechanical advantage (MA) but doesn't affect the amount of energy delivered. Energy is constant in any closed system. The amount of energy (measured in joules) is fixed It is delivered over time (watts or power). A battery has a limited amount of energy to deliver stored in a chemical form. Therein lies the problem, the amount of energy needed to move a climber through a given distance is a fixed amount that the battery needs to supply to the system. The gearing only provides a MA that reduces the input force (not energy)in relation to the output force at a cost. In this case speed. The motor needs to spin at a higher speed.

That's the problem with batteries in certain applications. There size (amount of chemical energy stored) becomes prohibitive where the energy requirement is high.
 
I tried out the Stihl battery powered hedgetrimmers the other day. They appear to be the real deal... plenty of power and very quiet. I was surprised how well it did.

I operate a small engine repair shop (Stihl and Husky dealer)... but I think this is the direction things are going.

Not every unit, but many units.

(And I definitely could see the Wraptor benefiting from a system like this...)
 
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Electric eliminates ambient weather differences too.


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this isn't true for car batteries, is it true for other types of batteries, i thought all batteries were somewhat affected by cold.
 
OMG! A saw you HAVE to use one handed!
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I like it and can definitely use a quiet, 'green' saw in the neighborhoods where I work. We have a landscaper here who has solar panels on his pickup and a pretty sophisticated charging system in the toolbox. He uses NO gas powered tools and that's his shtick, no noise, no fumes, no petroleum fuels. People here eat that up.

If it had the chain speed of a 200, kickback would be horrific because of the torque. That's the big advantage I see with electrics, the torque. It CAN be a substitute for chain speed in most cases but I wouldn't want to back cut a leaning top with it.

I'm ready for electrics but I doubt my bank account is.
 
The only real advantage to an electric Wraptor is noise. The things barely sips gas, over a 1000' on a single tank, that's insignificant in the context of tree work.

I know Paul has built an electric prototype but I haven't seen it or know if he has any plans to pursue it.
 
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Is that a gas powered chainsaw scar on your forearm?

Did it scar you emotionally too?

I like the smell of gas personally. But I don't mind seeing battery stuff either; I'm just playing.

Batteries are definitely effected by heat and cold. Too much heat, battery doesn't last long. Too much cold, same thing, or actually might not work at all.

I see NO need for the battery to have a holder or ring to lower it. Lower that little saw and the groundman puts in a new battery, big deal. That's what we do with the gas saws (lower them) and that's what I do with the DeWalt drill when cabling; lower it to get the new battery.

besides, doesn't it need refilled with bar oil too anyway? Or maybe the bar oil should be sent up too so you don't have to lower that extremely heavy saw.
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btw, I'm sure those batteries are real "green" in the landfills when they are done.
 
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Is that a gas powered chainsaw scar on your forearm?

Did it scar you emotionally too?
.
I like the smell of gas personally. But I don't mind seeing battery stuff either; I'm just playing.
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besides, doesn't it need refilled with bar oil too anyway? Or maybe the bar oil should be sent up too so you don't have to lower that extremely heavy saw.
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btw, I'm sure those batteries are real "green" in the landfills when they are done.

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Sorry X, There is a similar spot on the upper-arm. That's what you get when the branch you stand on breaks away and you are 'too close' to another one to grab onto. It only would've been a 3 feet fall into the main climbing system but now it were two big bloody spots on one arm.
And did it emotionally scar me? No, not really
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That's probably one of the Tea Tree oil side effects. It not only cures the physical body but also the mental state of mind
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The smell of gas has a positive side effect. The Benzene in the 'mix yourself two stroke' makes you forget all the bad stuff you have done in the previous years. AKA Alzheimer.

The bar oil needs only topping off every other battery.

Weather the machine is green is depending on the recycling program and energy supply in your country.
After the service life of the machine, in Holland all materials in electric appliances and battery's are fully recycled.
I buy my electricity from a company that produces it using solar, wind and water power. So, is it green over here? I really do think so.
 
its probably the battery thats heavy. i wonder if you could mount the battery ergonomically on your body or harness somewhere so it was balanced and not swinging and then run the saw with a cord that runs through the lanyard.
 
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