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Old 06-04-2019, 12:01 PM   #11
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Gotta reckon the engineers & designers contrived to keep the intrinsic machanicals in balance, not unlike a boat's keel ballast, so prolly needn't figure in the cyphering...
Tho unlikely they considered what we unbalanced folx would later deign to effect upon their designs...
Assiduous fore/aft, port & starboard loading in balance shouldn't impact stability or handling.
Of concern is the house bank being inside, tho you doubtlessly have concocted a scheme to allow them to safely vent to the exterior.
In which case, no need to get the lead out.
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Old 06-04-2019, 12:19 PM   #12
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Yep... I'm good to go on the venting. Going to use AGMs, as well as vent the compartments to the outside in the case the pressure buttons get pushed. I wanted them inside if possible to keep their temps in a happy range. Plus, when I'm alone, I plan to open up the cabinets and make Tim Allen "more power" grunt sounds.


Feel ya on the leeway, but my OCD wouldn't have it any other way
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Old 06-04-2019, 12:35 PM   #13
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Case like this, a little OCD is hopefully enough. I thought AGMs handle cold pretty well, not that freezing temps are on the menu, not outside of the fridge, anyway...
When waiting fills, I'd very much like to see your battery box. Or direct me to where it may already be posted, por favor
Not digging my "current" available options, tho still miles away from starting my batt bank.
In closing, I'd just like to add,
UNH!!!
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Old 06-04-2019, 01:42 PM   #14
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I'd very much like to see my battery box too, Matt! Currently in the planning stages here, unfortunately.

But I absolutely, positively will share as soon as this project goes hot. I'm pretty amped just thinking about it. I've been flooded with ideas. I think our bus has quite a lot of potential, so long as I don't encounter undue resistance from the wife. After all these years together, however, I'm able to gauge her pretty well.

Anyway, gotta go get some meditation time in. Catch you later...

'Ohm'
'Ohm'
'Ohm'
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Old 06-04-2019, 02:42 PM   #15
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1 gallon of FRESH water weighs 8.36 pounds 100 gallons would be 836 pounds.
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Old 06-04-2019, 03:45 PM   #16
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Quote:
Originally Posted by CaptSquid View Post
1 gallon of FRESH water weighs 8.36 pounds 100 gallons would be 836 pounds.
Understood. And the batteries weigh nearly another 800.

I'll be throwing out 16 children to make up for the difference.

Or 8 if they eat like me
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Old 06-04-2019, 09:44 PM   #17
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*owwie*
Yanno, I'm certain you HAD to miss an electrical pun in there, somewhere.
Quote:
Originally Posted by TheHubbardBus View Post


I'd very much like to see my battery box too, Matt! Currently in the planning stages here, unfortunately.

But I absolutely, positively will share as soon as this project goes hot. I'm pretty amped just thinking about it. I've been flooded with ideas. I think our bus has quite a lot of potential, so long as I don't encounter undue resistance from the wife. After all these years together, however, I'm able to gauge her pretty well.

Anyway, gotta go get some meditation time in. Catch you later...

'Ohm'
'Ohm'
'Ohm'
But after maybe 3.5 hours of interrupted sleep in the friggin elevated heat n humidity last night, the light bulb just ain't coming on for me.
Wattever I missed, gonna have to take a pas(quale)
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Old 06-04-2019, 10:41 PM   #18
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Thanks so much, Matt. But won't be necessary. Think we've got things tentatively figured out (fingers crossed).

With a bit of concession regarding our target floor plan, it looks like we can get the bulk of the vehicle weight - discounting the powertrain & shell - evenly balanced in regards to the rear axle. In our new plan, I'm putting the battery bank directly over the rear axle, the water tanks directly behind it, and most of the other heavy items spread out in front of it. Taking into account just about every item besides the engine, powertrain, and shell, I've got 2/5 of the mass behind the rear axle, 2/5 in front of it, and 1/5 directly over it. And what is behind the axle - mostly the water - is something we have the option of reducing significantly during long over-the-road stints to either improve ride quality/traction/road-holding and/or improve mileage.

Plus - side-to-side - I've got us down to <50# difference. Pretty much took all weekend to figure this stuff out, but I'm feeling pretty good about our plan at the moment. We'll see how it translates to real life soon (lol).

I'd say that's pretty darn good. I'm assuming the fuel tank is between the axles? That should be a good couple hundred pounds of centrally-located mass. Plus the engine up front gives you a lot of leverage against any of that rear overhanging weight.
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Old 06-04-2019, 10:55 PM   #19
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Between the axles, but unless they're paired, that's a big ol' sloshing mass only on one side, likely the shotgun.
If there's room on the driver's side (unlikely, since the start batteries live over there), that would be the place to place a 60 gallon, or whatever the tank's equivalent fluid volume'd be (plus delta density), potable water tank, to counter-balance the load.
However, given the gross mass of the bus, and the low center of gravity for the fuel tank (being at, & below, axle height), I'd bet cashy money that the clever fellers that crunched the numbers factored in that disparity in lading...
Also, the engine is, in a FE dog nose anyway, perched above the front axles, limiting the contravening leverage for excess loading behind the rear axles. The exception being a FF dog house, where the mill is forward of the steers, probably allowing heavier loading behind the drives...
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Old 06-05-2019, 08:52 AM   #20
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Between the axles, but unless they're paired, that's a big ol' sloshing mass only on one side, likely the shotgun.
Negative. Two 50-gallon fresh water tanks on either side directly behind the wheel wells (inside), with a larger, longer, and narrower 75-gallon grey water centered between the frame rails (outside). I do not plan on driving any significant distance whatsoever - at least not at speed - with the grey-water tank filled (partial or otherwise).

Quote:
If there's room on the driver's side (unlikely, since the start batteries live over there), that would be the place to place a 60 gallon, or whatever the tank's equivalent fluid volume'd be (plus delta density), potable water tank, to counter-balance the load.
I have planned to put the propane tank across from the fuel, if at all possible. The fluid weight doesn't completely balance it, but the tank itself weighs more, so it does come close.

The sloshing does concern me. I've considered 2 or 3 smaller tanks to replace each full 50-gallon. I also don't know if baffled tanks are common or easy to find?

I can always travel full or empty... empty if I realize my math sucks. Full if I like paying for diesel. For our purposes, we plan to always have the tanks full - at least while not in use in the boonies - as the bus will serve as another source of H20 to help meet our preparedness goals.

Regardless, Two rows of kids in the back could be the functional equivalent, minus sloshing (guess that depends on the kids), and that's without the additional ballast we'll be adding forward of the front axle (which is also distributed over a much longer axis than the weight in the rear, which hugs the axle).

Not arguing - I posted here because I'm asking. But just visualizing things... it seems to me that so long as I don't exceed the GVWR (and I'm not even close yet from what I can tell), my load is pretty balanced. If my thinking is in error, I appreciate y'all pointing it out!
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