{"id":20,"date":"2012-11-02T11:07:46","date_gmt":"2012-11-02T17:07:46","guid":{"rendered":"http:\/\/okstrong.com\/?page_id=20"},"modified":"2012-11-04T17:17:15","modified_gmt":"2012-11-04T23:17:15","slug":"sled","status":"publish","type":"page","link":"https:\/\/okstrong.com\/index.php\/sled\/","title":{"rendered":"Sled"},"content":{"rendered":"

Just pulled from the mold, my new double ended concrete sled it weighs 177lbs.
\n\"\"<\/a>
\nI modified this sled with plywood and sheet metal for the sled row.<\/p>\n

New sled made from light weight concrete weighs in at 278 lbs. and now I use concrete blocks made from one 80 lbs. bag each of regular quickcrete the weights varry from 82 to 87 lbs. with a total weight at about 790 lbs. 800 with a small block I made from left over concrete.
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Friction Coefficient<\/h1>\n

With this scale I came up with a friction coefficient on grass of about .53 after pulling 177, 277, and 302 lbs. After doing that I looked up the friction coefficient of car tires on concrete which is about .015. So with a little more research led me to the approximate weight of trucks so that I can attempt to prepare for truck pulls by pulling the concrete sled. Here it is.<\/p>\n\n\n\n\n\n\n\n\n\n\n\n
\n

Vehicle<\/p>\n

\n<\/td>\n

\n

Vehicle Weight<\/p>\n

\n<\/td>\n

\n

Force in Pounds to Move on Flat Concrete<\/p>\n

\n<\/td>\n

\n

Calculated Weight for Concrete Sled on Grass<\/p>\n

\n<\/td>\n<\/tr>\n

\n

1\/2 ton<\/p>\n

\n<\/td>\n

\n

4500<\/p>\n

\n<\/td>\n

\n

67.5<\/p>\n

\n<\/td>\n

\n

127.358325<\/p>\n

\n<\/td>\n<\/tr>\n

\n

3\/4 ton<\/p>\n

\n<\/td>\n

\n

7500<\/p>\n

\n<\/td>\n

\n

112.5<\/p>\n

\n<\/td>\n

\n

212.263875<\/p>\n

\n<\/td>\n<\/tr>\n

\n

2 ton<\/p>\n

\n<\/td>\n

\n

10400<\/p>\n

\n<\/td>\n

\n

156<\/p>\n

\n<\/td>\n

\n

294.33924<\/p>\n

\n<\/td>\n<\/tr>\n

\n

loaded 2 ton<\/p>\n

\n<\/td>\n

\n

30000<\/p>\n

\n<\/td>\n

\n

450<\/p>\n

\n<\/td>\n

\n

849.0555<\/p>\n

\n<\/td>\n<\/tr>\n

\n

empty semi and trailer<\/p>\n

\n<\/td>\n

\n

35000<\/p>\n

\n<\/td>\n

\n

525<\/p>\n

\n<\/td>\n

\n

990.56475<\/p>\n

\n<\/td>\n<\/tr>\n

\n

full 18 wheeler<\/p>\n

\n<\/td>\n

\n

80000<\/p>\n

\n<\/td>\n

\n

1200<\/p>\n

\n<\/td>\n

\n

2264.148<\/p>\n

\n<\/td>\n<\/tr>\n

\n

small jetliner empty<\/p>\n

\n<\/td>\n

\n

110000<\/p>\n

\n<\/td>\n

\n

1650<\/p>\n

\n<\/td>\n

\n

3113.2035<\/p>\n

\n<\/td>\n<\/tr>\n

\n

medium jetliner empty<\/p>\n<\/td>\n

\n

200000<\/p>\n<\/td>\n

\n

3000<\/p>\n<\/td>\n

\n

5660.37<\/p>\n<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n

The peak of 415lbf on the scale display occurred during Mike’s pull for 25′ at 362 lbs.<\/p>\n

Related Posts<\/h1>\n