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  #1  
Old September 1st, 2010, 02:39 PM
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Engineering/Physics question

How is this for nerdy. I usually pack my truck to the hilt with gear for the September Bowhunting season and I recently added a M416 military trailer and I was thinkin. Does it make a difference if I put say 500lbs in a trailer and pull it or put 500lbs in the back of the truck? Will the truck think it is lighter because it is easier to pull rather than carry. Of course the variable is that I also added a 600lb trailer to mix.

My theory is that it feels like a lighter load when I put stuff in a wheelbarrow and push it around than in a back pack and carry it on my person.
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  #2  
Old September 1st, 2010, 02:53 PM
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It feels lighter in a wheelbarrow because a portion of the weight is taken on the wheel as opposed to all on your back.

The engine and drive train still have to pull an extra 500 pounds. With a trailer it'll have to pull the extra 600 on top of that and it won't make a difference to the truck if it's in it or behind it, aside from the tongue weight pushing down on the rear end. The truck will obviously "feel" lighter with the stuff in a trailer, kind of like the wheelbarrow, but when you start to push that 500 pounds in the wheelbarrow up a steep hill all of the sudden you can feel it.
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  #3  
Old September 1st, 2010, 03:01 PM
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What do you mean by "will the truck think its lighter?"

If you mean "get better fuel mileage" then the answer is no, because your motor has to shift 1100 extra pounds instead of 500.

If you mean "handle better" because the weight isn't in the truck itself, then the answer is also no, because the handling of a truck with a trailer is not comparable to the handling of an uncoupled vehicle.

Your wheelbarrow theory does not relate at all. When you use a wheelbarrow, you are saving yourself the energy required to support a load (letting the wheel do it), and using mechanical advantage of the handles (levers) to control the load. You still have to expend calories to move the load around - push your wheelbarrow up a hill if you want to end your experiment faster.

Your truck expends no calories supporting a load and the motor has to pull whatever weight you attach to your truck.
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  #4  
Old September 1st, 2010, 03:16 PM
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Anything under about 1200lbs in the back of a land rover is fine. Beyond that, start looking for a trailer. I am not sure how you would get to 1200lbs back there as there is not much space, but ....
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  #5  
Old September 1st, 2010, 03:17 PM
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I also think you need to take into consideration that the trailer tounge weight is behind the axle to the amount of pressure can be more than the load that is evenly distributed above the axle. Its up to the driver to decide the point when to shift the load to a trailer. At 500lbs I think you are better off loading the truck. But if you shoot an Elk thats a whole different story.
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Old September 1st, 2010, 03:18 PM
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The primary differences are

1. You have more room in the truck
2. You can leave the trailer parked with your crap in it and drive around without it if needed

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  #7  
Old September 1st, 2010, 04:07 PM
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sounds like youre confusing your truck with your legs. engines dont have a sense of fatigue they just have limits.
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  #8  
Old September 1st, 2010, 06:07 PM
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Quote:
Originally Posted by zimm View Post
sounds like youre confusing your truck with your legs. engines dont have a sense of fatigue they just have limits.
You need to drive my Range Rover
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  #9  
Old September 1st, 2010, 07:18 PM
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You'll also have the added rolling resistance the third set of wheels add
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  #10  
Old September 2nd, 2010, 06:06 AM
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to the initial post- simple physics says it all makes a difference. Does the difference have an effect? Always. Will it affect milage, handling, wear and tear, etc? Yes. Positive or negative is the question. But the biggie is the Rover doesn't think at all- thank goodness. They behave like they do now, imagine if they could think- THAT would make the biggest incalcuable difference.
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Old September 2nd, 2010, 01:17 PM
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Quote:
Originally Posted by rover4x4 View Post
You need to drive my Range Rover

lol....

------ Follow up post added September 2nd, 2010 01:21 PM ------

i had a contractor making nice wine racks using terra cotta pipe.

we were talking with the customer and and he went on to say they were better for the wine too because they stayed colder than the air around them...

i smirked...

then he took her hand and put it on the wood table, then the pipe and said "see, its colder"


at about that point i walked out of the room laughing.
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  #12  
Old September 7th, 2010, 12:31 PM
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After some real world testing last weekend this is what I found out.

The trailer and gear is light enough that it does not really make any difference as you can not really tell it is even back there. Of course going up hill I can tell a difference as the trailer wants to roll backwards, so going through the Eisenhower Tunnel is an intesting experience. Having the trailer is more convenient as I used to have to take the passenger seat out so the Easy-Up canopy would fit in my truck. Now I don't have to drive around for a month without a passenger seat. And best of all we found out that a quartered elk fits very nicely in the trailer!!
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Old September 7th, 2010, 12:34 PM
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Quote:
Originally Posted by Craigd View Post
After some real world testing last weekend this is what I found out.

The trailer and gear is light enough that it does not really make any difference as you can not really tell it is even back there. Of course going up hill I can tell a difference as the trailer wants to roll backwards, so going through the Eisenhower Tunnel is an intesting experience. Having the trailer is more convenient as I used to have to take the passenger seat out so the Easy-Up canopy would fit in my truck. Now I don't have to drive around for a month without a passenger seat. And best of all we found out that a quartered elk fits very nicely in the trailer!!

ELK? Got Pics....
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  #14  
Old September 7th, 2010, 01:00 PM
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This is the aftermath, the pictures in the field are on my friends camera, I will have to get them soon. It took us 7 years for one of us to get an elk with a bow. Unguided Bowhunts on public land is supposed to be the hardest way to get an Elk. I have two more weekends to get out so hopefully I can get one too. We found a new spot last year that seems to be better for Elk.
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  #15  
Old September 7th, 2010, 01:09 PM
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Elk tenderloin-the ultimate "its whats for dinner" scenario.
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Old September 7th, 2010, 01:32 PM
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Quote:
Originally Posted by Craigd View Post
This is the aftermath, the pictures in the field are on my friends camera, I will have to get them soon. It took us 7 years for one of us to get an elk with a bow. Unguided Bowhunts on public land is supposed to be the hardest way to get an Elk. I have two more weekends to get out so hopefully I can get one too. We found a new spot last year that seems to be better for Elk.

Very nice, I hunted outside of Durango a few years ago, missed a 6x6 with the bow. Will be hunting in Montana this year for elk and Mule deer (defender not going on that trip). Will be taking it on the NJ bear hunt, last time we had the hunt I hauled one out with my rusty Taco....

I can't wait to load a bear up in the back of the Defender this fall....NJ does not allow ATV's but they do allow trucks on state land....
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Old September 7th, 2010, 02:16 PM
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Funny side story, we were at the meat processor in Kremmling picking up the elk and this guy and his son were dropping off two nice Buck Mule Deer. We were talking to them about hunting and all of a sudden my friend says to the man "I think I know you" He said "you do?' , and it turns out it the guy was Mike Timlin a former pitcher for the Red Sox. Pretty nice guy.
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