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Hypothetical Hydraulic help.


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#31 tater195 OFFLINE  

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Posted March 03, 2015 - 11:09 AM

From what I am used to seeing in production model units, there is no way in hell that thing should be able to lift that tank. I have ran the mini skidders that probably weigh 3x more than that thing and get tippy with 400# of sand. I am guessing the tank weight at 700# and with a mid engine, no visible ballast weight and no operator weight, I'm gonna have to throw the BS flag on that one.

#32 Cvans OFFLINE  

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Posted March 03, 2015 - 11:18 AM

I have to agree that the tank looks to be a stretch on what that cart should be able to lift. On the other hand are the rear tires loaded? Maybe something there that we are not seeing.


Edited by Cvans, March 03, 2015 - 11:22 AM.


#33 tater195 OFFLINE  

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Posted March 03, 2015 - 11:27 AM

They would have to be filled with lead. 10 gallon of water wont help that much

#34 UncleWillie OFFLINE  

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Posted March 03, 2015 - 11:34 AM

Since the tank is right against the cylinder it is putting most of the weight on the front axle not over it.



#35 tater195 OFFLINE  

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Posted March 03, 2015 - 11:41 AM

The cg looks to be 20-24" in front of the axle. To balance that you would need equal weight behind the axle. The higer you raise it the more balance weight you will need for a static load. For a dynamic load ( tank swinging) you could need 10X that much.

#36 Cvans OFFLINE  

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Posted March 03, 2015 - 12:29 PM

I can't say as I can see the guy has anything to gain by photo shopping the picture. Not like he is selling plans or anything. Wait a minute I just figured it out, the tank is full of helium!


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#37 UncleWillie OFFLINE  

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Posted March 03, 2015 - 12:41 PM

He probably has the rear tires loaded and for all we know he has the frame filled with lead. Or possibly that is only a half a tank and the other side is missing.


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#38 MH81 ONLINE  

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Posted March 03, 2015 - 01:49 PM

You beat me to it with the helium crack.
I would love to see it in operation and get a real feel for its stability.

UW, that is a long way to work to an upright position IMHO. Like sports cars, I roll out of them and struggle to stand up.
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#39 Bmerf OFFLINE  

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Posted March 03, 2015 - 02:32 PM

Wouldn't the operator add ~200# of ballast while lifting? Once lifted and not moving, no ballast needed for the photo?

 

My biggest concern would be that the axle is not designed to move that kind of weight. The lift arms/cylinder/boom all look to be very well made (meaning HEAVY) Probably 300-400#+ on the axle with nothing on the lift. Add the weight of an empty 500 gal propane tank @ ~900-1000#, (this tank looks to be the smaller 325 gal size ~625#) This would be ~1500#ish live weight on the GT rear-end. I know wheel horse transmissions are tough, I am just not sure how long it would live with that abuse.



#40 tater195 OFFLINE  

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Posted March 03, 2015 - 03:30 PM

I over guessed on the weight of the tank. It looks like a 250 475#.

An extra 100# hiding some where around the seat would hold it like it is safely.

Adding in 200# for a fudge factor in the seat would be iffy on any kind of a slope, and I prefer not to have any fudge in the seat.

 

So back to the original topic... if you wanted to lift 3X the weight, you are probably looking for a machine 4X as big



#41 Auburn David OFFLINE  

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Posted March 03, 2015 - 04:31 PM

I have all kinds of Hydro pumps and motors and hoses and controls..too bad you don't live closer


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#42 Cvans OFFLINE  

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Posted March 03, 2015 - 05:05 PM

 

I have all kinds of Hydro pumps and motors and hoses and controls..too bad you don't live closer

 

His mail man probably lives pretty close to him. Maybe you can get together through the mail. 


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#43 UncleWillie OFFLINE  

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Posted March 03, 2015 - 06:26 PM

I have all kinds of Hydro pumps and motors and hoses and controls..too bad you don't live closer

Why didn't you tell me that when I was broke down in Tuscaloosa? :mad2:


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#44 Alc ONLINE  

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Posted March 03, 2015 - 08:43 PM

Since this is in the idea phase ,,,, you could use front spindles from a 4x4 bolted solid to the frame , use hyd motors from a zero turn on each axle stub .Using joysticks you could spin in a circle then unlock the hubs to just flat tow it to the next location. The rear wheels would be on casters , a drop down leg lifts the rear high enough to hook the tow vehicle to .This is similiar to how the Dig It towable back hoe is made
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#45 BTS OFFLINE  

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Posted March 03, 2015 - 10:19 PM


 

So back to the original topic... if you wanted to lift 3X the weight, you are probably looking for a machine 4X as big

 

??? Why would the machine need to be 4 times bigger? if the hydraulics are strong enough then I'd say to ad some counter weight and it would be fine.






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