Pinewood Derby,Intent of Rules?
Charter Member
01-28-2004, 07:26 PM
#25
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Originally posted by insptech
It all seemed like too much work so this year we are renting one......
It all seemed like too much work so this year we are renting one......
I would have rented you one real cheap
01-28-2004, 08:54 PM
#26
damn, time printouts?
Didn't realize the derby got so high tech. We always just went by the 1st one across the line wins.
Back when I was in scouts, many yrs ago, the cars were built by the, um......................scouts. Dad helped me with the weight, I did rest.
But, we have a wind tunnel if you really want to set it up.
One of the professors uses the tunnel for setting up his bike for the salt flats.
Is this for the kids or the dads?
Didn't realize the derby got so high tech. We always just went by the 1st one across the line wins.
Back when I was in scouts, many yrs ago, the cars were built by the, um......................scouts. Dad helped me with the weight, I did rest.
But, we have a wind tunnel if you really want to set it up.
One of the professors uses the tunnel for setting up his bike for the salt flats. Is this for the kids or the dads?
__________________
Some people are like Slinkies - Not really good for anything, but they
bring a smile to your face when pushed down the stairs.
Some people are like Slinkies - Not really good for anything, but they
bring a smile to your face when pushed down the stairs.
01-28-2004, 09:26 PM
#28
Platinum Member
Platinum Member
Teflon wasn't NEARLY as good as graphite.
One year, we had "graphite dispensers" with cavities drilled into the body we would fill with graphite before a run. During the run, graphite would pour onto the wheels and axles. Left a mess..
Another year the car weighed virtually nothing, with all of the weight ON the rear axle and at max weight and max wheelbase. One front wheel .100" above the track and toed out visibly. Wheels trued and alignment dead on (on 3 of them). Took 1st up till regionals where the transition from downhill to flat was very abrupt. Front end bounced at the transition and it got crossed up a for the remainder of the run. Got 4th. Shoulda had the CG a little further ahead of the rear axle.
Fun stuff.
We also won some cake baking contests and the catfish tournament.
One year, we had "graphite dispensers" with cavities drilled into the body we would fill with graphite before a run. During the run, graphite would pour onto the wheels and axles. Left a mess..
Another year the car weighed virtually nothing, with all of the weight ON the rear axle and at max weight and max wheelbase. One front wheel .100" above the track and toed out visibly. Wheels trued and alignment dead on (on 3 of them). Took 1st up till regionals where the transition from downhill to flat was very abrupt. Front end bounced at the transition and it got crossed up a for the remainder of the run. Got 4th. Shoulda had the CG a little further ahead of the rear axle.
Fun stuff.
We also won some cake baking contests and the catfish tournament.
01-29-2004, 08:00 AM
#29
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The latest is a Teflon plasma coating done by the same company that tungsten coats the clamp section of our bend dies. The axel's should be about $40 each.
01-29-2004, 08:18 AM
#30
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Originally posted by jrz
The latest is a Teflon plasma coating done by the same company that tungsten coats the clamp section of our bend dies. The axel's should be about $40 each.
The latest is a Teflon plasma coating done by the same company that tungsten coats the clamp section of our bend dies. The axel's should be about $40 each.
