Drag sled

[DACP]

Anyone know of a company that sells drag sleds? We have a few that we made, however they are........well crap. There is some money in the budget left over to get equipment so the boss was thinking on getting one or two. I have searched all over the internet and can only come up with what looks like old ammo cans with a tire bolted to the bottom, the same thing we have, many years ago some sales rep came by with some wonder device that you ran over the surface and it displayed a reading of the factor, it was about the size of a square office type trash can I want to say the company was out of Canada but thus far I have not found anything even remotely close.

In the process of finding a sled, I have come across much litature and studies as to disproving the accuracy of the sled, and not even using one all together, is there anyone out there that is not using a sled to find factor, and if so how do you do your equations, are there any disadvantages or advantages in your opinion either way.

[Delta_V]

What makes the drag sleds that you have now crap? They don't have to look good, they just have to work. A drag sled is basically just a weighted tire with a known weight. There's nothing really technical or fancy about them.

As to accuracy, a drag sled is very accurate as long as it is used properly, however pulling the sled with an upward or downward motion will skew the results and give you erroneous readings.

If your department cannot afford $900 or so for a VC3000, you can usually find used VC2000s on ebay for around $200. They're just as accurate as the VC3000 when it comes to getting your factors, they just don't have all the bells and whistles. The good thing about using a Vericom as opposed to a drag sled is that you can use it to get rolling friction values if you ever needed them. A drag sled is obviously only going to give you values for a skidding tire.

[DACP]

Crap as in falling apart, tire is falling off the box, the top of the can fell off who knows when and the cement is chipping inside. It is due to negalance on the part of the investigators not taking care of the equipment, those people are no longer there but we have to deal with all the junk they made for us. We do have a VC3000 however it to is falling apart, the state of our equipment is sad.

[Bully]

wardsci.com has a drag sled for $74.95. It might be just what the doctor ordered.

[leesrt]

For the right price I'll sell you my ex-wife. She's pretty much dead weight. She'll even motivate you by yelling various explicitives that describe how worthless you are until you get moving at a pace she feels is propper.

[Ifly]

For the right price I'll sell you my ex-wife. She's pretty much dead weight. She'll even motivate you by yelling various explicitives that describe how worthless you are until you get moving at a pace she feels is propper.

That was great!

[Red Swan]

what would you need/use a Drag Sled for?

[Delta_V]

what would you need/use a Drag Sled for?

Finding the drag factor of a roadway????

[Seventy2002]

some wonder device that you ran over the surface and it displayed a reading of the factor, it was about the size of a square office type trash can I want to say the company was out of Canada but thus far I have not found anything even remotely close.

Might have been the DART electronic sled. Looks like the company is out of business.

My agency's sled is welded steel, about as cop-proof as one can get.

[1042 Trooper]

I made my own. Just cut an old tire in half, fill it a third with concrete. Weigh it, attach a chain and fish scale and it works like a charm.

[DACP]

Might have been the DART electronic sled. Looks like the company is out of business.

My agency's sled is welded steel, about as cop-proof as one can get.

Darn, that was the product I was talking about. guess we can just make an old fassion one and try to cop proof it
leesrt no thanks, have an ex wife that can do the same thing.

[Seventy2002]

Darn, that was the product I was talking about.

Ours came from Canada. Probably the design referred to in this document. I can snap some pix, if you want. Any compentent metal-working shop could duplicate it.

[APDSgt]

I made my own. Just cut an old tire in half, fill it a third with concrete. Weigh it, attach a chain and fish scale and it works like a charm.

What we use too. Never had any issue.

If I can build it, it had to be easy.

[SCSO612]

Is this what you were talking about?

http://engtech.ca/projects/2004/drag_sled

[PRESSHRD5COPIES]

http://www.brakerbox.com/#Drag_Sleds

wardsci.com has a drag sled for $74.95. It might be just what the doctor ordered.

Interesting product but I noted that it is only 15 pounds. We have always used a minimum weight of 50 pounds.

Here is a drag sled I was thinking of buying for our department. It is also a product of Canada.

http://www.brakerbox.com/#Drag_Sleds