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Transcription: [00:20:39]
Yes

[00:20:43]

{SPEAKER name="Marvin Salo"}
The groove is I don't have a ski here and I don't have an easel here.

[00:20:49]
but, as oh, I can do that, we'll improvise.

[00:20:56]

give me just a small piece of paper. I don't need very big

[00:21:13]

Now the top of the ski actually would be straight. You know you put a straight top. Let's put a mold like this on a ski. The top of the ski would be straight. The groove on the bottom of the ski would come

[00:21:24]

[[Silently drawing]]

[00:21:46]
The groove in the bottom in the ski would be pertain about this manner. As you look if the ski was cut in half it would be in this manner. But if you take this piece, the same length of paper and you make it round for the same length it would be quite a bit longer so consequently it would have more friction in it.

[00:22:07]
But, as you cut the sides down and your sides up in this manner it would have less friction and naturally you wouldn't be as tired. You wouldn't wear out as fast, because skiing is a method of motivation and motivation is a method of travel and the travel is a long distance and you never go any further than you knew how to back from.

[00:22:26]

Now, is there any questions. Where is this-- There was a young guy here that wanted to know some questions.

[00:22:37]

I guess he, yes

"BGV"
Is the groove on the bottom specifically to reduce friction in it? When you're skiing? Is that why they have grooves on cross country skis?

"Marvin Salo"
That's why they have the straight groove. That's why most all Finnish that were racing skiers up in northern Minnesota racer had the square groove on it and the method that they use for speed they use a concoction of pine tar, bear grease, paraffin, and uh this um made a base and they put it on their skis which abled them to walk up a hill and slide down a hill and this would change in all different types of snow.

Transcription Notes:
can't make out the question asked around 22:37. The transcription is correct for that question.