I volunteered to purchase the Pinewood Derby kits for our Pack from the Scout Store, and I figured that since I had 54 unopened boxes (all copyright dated 2012), I'd run a bit of an impromptu weight analysis. I already knew that everything but the block (box, instructions, stickers, axles, wheels, packaging glue) reasonably consistently weighed 38 grams, so I weighed each box and tallied the results in a spreadsheet.
Lightest box: 123 grams, which equates to a 85 g (3.00 oz) block. I opened this box and discovered the block had cracked - it'll be used as a teaching aid in the future. The next-lightest box was 130 g, which equates to a 3.25 oz block.
Heaviest box: 171 grams, which equates to a 133 g (4.69 oz) block. I opened this box and saw (unsurprisingly) that the block was very firm and dense-grained. Needless to say, some wood would have to be removed to hit the 5 ounce limit without any added weighting. 4 out of 54 boxes (7.4%) were above 165 g (4.5 - 4.7 oz blocks).
Average weight: 145.2 g (box), 107.2 g (block) - about 3.78 ounces for an average block.
Mode: The most frequent (n=5) were 135 g boxes / 97 g (3.42 oz) blocks - on the light side of average.
Standard Deviation: 10.67 g, 0.38 oz.
Science Marches Onward!
- Master Pine Head
- Posts: 169
- Joined: Tue Dec 13, 2011 10:01 pm
- Location: Northeast, Illinois