Since it is only 2' tall, can it accurately represent a cars performance on a full size track.
Would it more accurately represent a 35' or 42' track?
Would it accurately represent a cars performance on the flat?
Any feedback would be greatly appreciated. I have had a couple people tell me they like theirs but I am wanting to hear the pros and cons.
- Pine Head Legend
- Posts: 1581
- Joined: Fri Apr 01, 2005 2:40 pm
- Location: Huntsville, AL
our experiences on this track:
1) it is smoother than most wooden tracks
2) cars with aggressive COMs but the dreaded wiggle problem do well on this track as there is only 8 feet of flat straight... this is bad as it masks how much ground a wiggling car will lose on a track with a long straight
3) it is a good "wiggle meter" as it allows us to see wiggle form, we (by dumb luck) made the 3 lane joints such that one is rough, one is medium and one is fairly smooth (go figure, I'll take that kind of luck anyday, hahahah!)
4) it is just a lot of fun to play with (it works with K-Nex car, hot wheels and stuffed animals too!)
It was successful in that it gives us a pretty good indication of how our cars will perform at the pack level, obviously anything could be different at council/district level. The biggest expense was the timer (MicroWizard), but pretty important I think. The down side was that even with copying existing plans, it took me parts of three weekends to build it. (Built when we should have been working on our cars ! )
So my point is you have to know something about what track you are going to compete on to judge how good an indicator this track will be. I am sure it will be measurably better than just an 8' test board. I think Teeeman's experience is worth noting. We have only run long wheelbase, non RR cars that are pretty stable so far, so I don't have that kind of experience to relate.
The physics of the 20' best track are not exactly what I thought would happen before I actually experienced it. First, the run time of a well tuned car is just over 2 seconds on this track. Second, it is very difficult to translate the performance of a car on a this track to a 35' or 42' best track. For example, how does a 5msec difference between two cars on the 20' track translate to a 42' track? This is not a linear extrapolation you can do easily, but Doc Jobe's software can help. Accurately predicting the perfomance on a Piantedosi is even harder. I found predicting the wiggles (at full speed on a full size track) is very hard to do (on a scaled down track) unless a car is just really bad in the rear end.
Even with these caveats, you can do a lot to tune a car on a scaled down track. Just be careful how far you extrapolate.