Generator PTO Generator

[Diamondpilot]

He is right. I have a Bachelor Degree in Aeronautics. Its called parasite drag or parasitic.

Parasitic drag - Wikipedia, the free encyclopedia

My next door neighbor had a 28' 7,000# bumper pull camper and pulled it with a 2005 F-150, got 10 mpg. He upgraded to a 2007 D-max 3500 and got 12 mpg. He was truly disappointed but it was not the trucks fault. They were in the market for a 35' Goose Neck last winter and I looked at them all with him. The ones with a smooth finish and a rounded back is what I suggested. He end up with a 38' with the features mentioned and a weight just shy of 14,000# empty. He has taken the new one about 7,000 miles last summer and averaged 11.5 or just slightly worse than the old camper that was half the weight and 10' shorter.

Chris

 

[Smokin Diesel]

He is right. I have a Bachelor Degree in Aeronautics.

You too? Got mine from Riddle. How about you?

 

[gemini5362]

Hmm.. I wouldn't automatially ssume that a lawnmower engine is going to be superior in fuel economy to a nice diesel tractor.. remember.. rpm of your tractor is not what uses fuel.. it's hp used.. p used will be determined by electrical load.. that load, in an equal comparison to the 13hp gasser nd the diesel.. just because yor engine is rated at 49 hp does not mean you are making it if.. say.. it only needs 13 hp... that means your fuel usage should pretty closely track hp usage.

I know my 12hp rider lawnmower DRINKS gas compaired to my larger diesel tractors looking at work done.. ie. amount of grass cut. 5g of diesel cuts 10ac of pasture for me... that rider cutting those 10ac will suck down a whole lot more than 5g of gas!!.. I've never been able to get more than an hour of runtime out of a gallon of gas on that rider... and it'l take a whole lota hours to cut 10ac .. so you can see where that fuel savings theory just went! Fuel used pretty closely tracks work done on n average diesel... that same 5g of fuel oil runs my 95hp/15' mower for 2 hours.. or the 70hp/10' mower for about 3 hrs... both eilding a 10ac cut.... I've used the 95hp tractor on the 10' mower used the same fuel and ran the same amount of time as the 70hp tractor..

soundguy

I believe if you will reread my thread you will notice that one of the differences I noted was that the generator will go down to an idle and when you are not pulling any apreciable current. As the current demand goes up then it will speed up the motor on the generator. The tractor does not have that capability so it will be running at full rpms any time you are using the generator. The governor will make some difference but basically it will not be sitting at an idle until you need it. I have not checked to see how long my tractor will run with 7 gallons of fuel but the generator will do somewhere between 10 and 12 hours maybe longer depending on how much electricity I use. I also believe there is a difference in price of almost 1.00 per gallon locally. since gas here is running about 1.90 a gallon on the average that is going to make a huge difference in computing the cost.

 

[atgreene]

The only problem is that there would have to be NO load on the generator. If you're powering a house that will not happen. If you are powering a few items like a well and furnace, yes it may go to idle until a load is detected. Depends upon how you are set-up to power your needs.

 

[Iplayfarmer]

Sure. You're adding a trailer with a bunch of wind resistance and a handful of tires. Pretty much what I said above.

Think of an over-the-road semi with a dry van trailer. It can double its weight when loaded, and still stay within 10% of its unloaded milage. Or Boneville Salt Flat racers. Those cars are heavy as heck, but very slippery.

Nobody has proven Newton wrong yet.

It does seem like I can get about the same mileage pulling a trailer whether the trailer is empty or full.

I'll support your claim about Newton as long as it's understood to only apply in a macro physical world. Atomic physics deviate a little bit.

 

[JB4310]

I have a 540 and a 750 setting on my Kubota (50 - hp). When I run my 16 k generator I have found that the 750 setting with the tractor idled back to 540 rpm will not govern itself close enough to work well.

So the 750 pto gearing is 1-1 with the crank shaft?, if I got that right, or do you mean engine idled back so pto is turning the required 540 rpm. I believe there would be trouble governing a huge load but what about a 5 kw draw, with your 50hp and 16 kw gen, couldn't it handle that?

Regarding the idle control on the portables, it works fine for a construction site when there is only intermittent power needs, pick up the saw the gen speeds up, put it down and she idles down, as was mentioned that doesn't really come into play in the home, even with a 10 watt light on the thing is gonna be turning 3600 rpm's

Anyway, I enjoy the generator debates, looks like there is no perfect choice for everyone as needs differ, opinions? that's a different story, gets a little testy sometimes, but still civil.
JB.

 

[SPYDERLK]

that was covered in post 75

 

[khamill2000]

Got an email from them stating that it is backordered and they don't have a ship date yet.

 

[Diamondpilot]

You too? Got mine from Riddle. How about you?

Indiana State University Class of 1996.

Chris

 

[Diamondpilot]

I believe if you will reread my thread you will notice that one of the differences I noted was that the generator will go down to an idle and when you are not pulling any apreciable current. As the current demand goes up then it will speed up the motor on the generator. The tractor does not have that capability so it will be running at full rpms any time you are using the generator. The governor will make some difference but basically it will not be sitting at an idle until you need it. I have not checked to see how long my tractor will run with 7 gallons of fuel but the generator will do somewhere between 10 and 12 hours maybe longer depending on how much electricity I use. I also believe there is a difference in price of almost 1.00 per gallon locally. since gas here is running about 1.90 a gallon on the average that is going to make a huge difference in computing the cost.

I have a 8550 watt Troy Built that I used for 8 day straight once, and two other times for 3 days at a time. It will run 24 hours on 9 gallons of fuel. I have a well, but propane for the furnace and hot water. We have 2 fridges and a deep freezer plus the wife used the stove (1 burner at a time) the micro, garbage disposer and the crock pot with no problems. We use the garage door opener, were smart with the lights but keep the tv and the satellite going.

Chris