Guide line update for second half 2010
Posted: Fri Apr 23, 2010 6:44 am
In an effort to introduce an extra level of parity to the set class racing I have decided to trial a new guideline for the second half season 2010. The guideline I am thinkiing about is the 3 : 1 or higher final drive ratio. Why so? I have often been bemused at the success of Ninco models on board track when raced against a host of other models with the same speed motors. Some simple maths shows why they are so dominant.eg, lets take a model with 21 mm diameter rear weheels.
21.0 X 3.142 gives the rolling circumference 65.982 m.m. divide by 3 from (3:1) gives the distance travelled for one motor revolution, eg. 21.994 m.m. Multiply by 18,000 to get the distance per miniute. 395892 mm per minute. Divide this by 60 to get the distance travelled per second, in this case 6.598 metres!!
Now, lets take a Ninco NC5 with the red sidewinder gears. These gears are 32 : 12 or 2.666:1!! Maths if you want to check is 21 X 3.142 div 2.666 X 18000 div 60 ! This, if you do the maths, comes to 7.425 metres per second. This amounts to 0.827 of a metre (82.7 cm) per second on the track (12.5 %) , which I think is a little lop sided when it comes to parity!
So as mentioned, prepare yourself for the guideline which will kick in from July 2010 for Slotcar Legends race meetings. The guideline will also apply to all makes and the fitting of 10 Z pinions to cars will only count if you also fit a 30 z or greater crown gear. As an observation, the black Ninco sidewinder gears are rated at 33 : 11 (3 : 1 ) and are available as an axle, spare Pt No. 80419 53.5 mm wide. In-line Nincos are already 3:1
Please note, this will only apply to the set class usually raced as the middle event of the evening. Trophy classes and Track Owners Choices will still have their own specs issued for each event.
Ciao.
21.0 X 3.142 gives the rolling circumference 65.982 m.m. divide by 3 from (3:1) gives the distance travelled for one motor revolution, eg. 21.994 m.m. Multiply by 18,000 to get the distance per miniute. 395892 mm per minute. Divide this by 60 to get the distance travelled per second, in this case 6.598 metres!!
Now, lets take a Ninco NC5 with the red sidewinder gears. These gears are 32 : 12 or 2.666:1!! Maths if you want to check is 21 X 3.142 div 2.666 X 18000 div 60 ! This, if you do the maths, comes to 7.425 metres per second. This amounts to 0.827 of a metre (82.7 cm) per second on the track (12.5 %) , which I think is a little lop sided when it comes to parity!
So as mentioned, prepare yourself for the guideline which will kick in from July 2010 for Slotcar Legends race meetings. The guideline will also apply to all makes and the fitting of 10 Z pinions to cars will only count if you also fit a 30 z or greater crown gear. As an observation, the black Ninco sidewinder gears are rated at 33 : 11 (3 : 1 ) and are available as an axle, spare Pt No. 80419 53.5 mm wide. In-line Nincos are already 3:1
Please note, this will only apply to the set class usually raced as the middle event of the evening. Trophy classes and Track Owners Choices will still have their own specs issued for each event.
Ciao.