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Old 06-06-2008, 03:46 PM   #11
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Re: building a fuel miser bus.

caterpillar has just announced that the 2009 d7 dozer is going to be diesel/electric, high ttorque output diesel,ac generator, ac motors and final drives, no transmission, just solid state controlls. projected savings of 20% in fuel and maintainence over the life of the machine. the articledidn't say anything about regeneration and or massive battery storage systems.
it should be interesting to how it is recieved in the construction buisiness
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Old 06-08-2008, 07:01 PM   #12
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Re: building a fuel miser bus.

makes sense for a dozer as it will replace hydraulic drive which is horribly inefficient.
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Old 06-08-2008, 07:03 PM   #13
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Re: building a fuel miser bus.

Quote:
Originally Posted by lapeer20m
hybrid stuff is fine for the future, but for skoolie owners right now, i think that a good rear end gear set, a 6 speed manual and the cummins 5.9 as well as reduced weight are gonna be about as good as you can get.

i would imagine that lowering the suspension on the bus closer to the ground, and even doing the opposite of everyone else and lowering the roof should both decrease wind resistance and thus improve fuel economy. If you were really creative you could have a very low ceiling in transit, and have a "pop-up" when you park.
now you've done it. you got elliot thinking again about a pop top millie. i am certain that within minutes of reading this he will have some sort of bicycle powered lift mechanism dreamed up.
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Old 06-09-2008, 12:02 PM   #14
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Re: building a fuel miser bus.

1.54 hp /kw is the conversion factor. a generator is a constant speed variable load device, very efficient compared to variable load and speed engine used for motive use, electric motors produce max torque at 0 rpm, therefor it should be a matter of working out the controllers and a cost issue with copper prices way ahead of energy prices, but that's all in the future.
todays reality is probably an electrinic managed diesel with a 5 to 9 speed trans. low rear ratio efficient radial tiresand some aero work on the frontend with full skirts on the sides and a monster pop top like the alaska pu campers.
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Old 06-09-2008, 06:14 PM   #15
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Re: building a fuel miser bus.

Quote:
Originally Posted by lapeer20m
This thing can get near 30 with the 3 cylinder mercedes benz diesel. i have a buddy that has one in a motorhome configuration and he loves it.....except for that new car
Be careful when they get over 100k. FedEx is rotating theirs out and going back to Econolines.
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Old 06-09-2008, 09:47 PM   #16
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Re: building a fuel miser bus.

i almost forgot about the 9 liter v8 international motor.

Greg A. the guy who sells buses believes the 9 liter can get over 15 mpg with the correct gear ratio/transmission he also says that motor will last forever. one thing i do know, is that they are really really gutless....but that's the price you pay for more mpg.
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Old 06-09-2008, 11:10 PM   #17
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Re: building a fuel miser bus.

The Thomas C2 and Bluebird Vision are both more aerodynamic than my Wayne by a long shot. I think visibility was the primary concern in designing them, but I don't think the aerodynamics hurt the fuel economy either.



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Old 06-10-2008, 08:48 AM   #18
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Re: building a fuel miser bus.

I think those new style buses with the slanted noses give a very small increase in mileage due to aero drag. I think the design is all about eliminating blind spots in front to keep the bus driver from splattering timmy when he runs in front of it.

BTW, I think they look gay.
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Old 06-10-2008, 08:53 AM   #19
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Re: building a fuel miser bus.

as for brick like aerodynamics, I think that would be a big improvement. A brick has smooth sides unlike a bus which has all sorts of stuff tacked on to grab air.

If I ever do get around to getting a bus, I would like to look into some sort of belly pan. It would probably be alot easier to do to a RE as you don't have exhaust/driveshaft issues. It would also creat a lot of storage space between all those floor joists or whatever you call those things underneath.
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Old 06-10-2008, 04:57 PM   #20
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Re: building a fuel miser bus.

the new usses are all about wind resistance/fuel mileage, the trucks that they are based on, international and freightliner/mercedes are using the aero noses on their medium dutytrucks, the cowl and windshields are also carried over, the tall curved windshields different pieces but then you have to ask who /what are the corporate affilliations of thomas and bluebird.
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