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Couldn't help but to jump in here. Before I bash internal combustion I should say that I'm addicted to it in all its forms. That being said, a gasoline engine such as that powering a car typically converts only 20 to 30 percent of the energy released in combustion into usable work at the flywheel. The rest is lost in a variety of ways, mostly through heat sent out in the exhaust and through the cooling system. Think about it, the expansion (compression ratio) allowed for capturing the energy is about 10 to 1, while the expansion to ambient pressure in converting from liquid starting material to gaseous products is 1000 to 1. We let a lot of high pressure hot gases out as waste. So, there are huge opportunities to recover some of this using hybrid designs or other means. In a hybrid, the idea is to use an undersized but efficient gas engine for power and run it in a narrow, efficient rpm range. All power comes from this engine, and it ultimately is sufficient because it can continue producing power during coasting, for eample, and that power is stored in a battery and released through an electric moter as needed.

Hybrid cars
Autos SUV Trucks
Replies 49 Post by DonaldC

Hi, just got back to my computer. I need to upgrade my membership, so I didn't see all of your post. Where were you guys last fall when I posted? I now have a set up on my tractor, but had to weld cracks, replace bearings . etc. Please respond to doncan1500, provider is earthlink.net How much do you want for the setup?
At this point, I don't think my better half will stand for any more investment in mowing.
Don

Looking for belly mower for 870
John Deere Tractors
Replies 7 Post by DonaldC

Thanks a lot. This is very helpful. After some consideration, I'm leaning towards a 3 pt finish mower. The benefits should be cost and ease of mounting/removal. My mowing is about 1.5 acres open field, 1.5 acres dotted with trees, playset and other obstacles. From reading other posts, I think the the rear finish can do the job, providing I do some border trimming with a little rider.

mid pto for JD 870
John Deere Tractors
Replies 3 Post by DonaldC