Rule Clarification - 9.4.4
We have had a number of queries in the lead upto the nationals with regard to what is acceptable under rule 9.4.4 in the rule book.
"9.4.4 A maximum of two fans of up to 40mm each for the purpose of cooling electronics (ESC, Motor, etc) may
be fitted to the car. No other form of cooling is allowed. Fans must be powered by the main battery pack."
The intent of the regulation is to remove the opportunity for a cooling arms race, and racers exploiting excessive fans and ducting that hinders scrutineering. However, we have become aware that the regulation is possibly too ambiguous, and that whilst the intent is correct, the technical wording could be improved.
For the nationals, the following clarification will be in effect;
Cooling fans - a maximum of 2 fans are permitted per car to cool electronics. They both may be of any size, up to 40mm maximum. Must be powered by the main battery pack (direct, via receiver or ESC is fine)
Ducting - Any form of ducting or enclosure that directs cool air to the motor is prohibited - this includes flat plates, home formed ducts and so forth.
Mounts - Fans may be mounted using any means, provided that it is a mount in function only. A mounting intended to provide cooling benefit (heat sink style, or with integrated ducting) is not permitted. To clarify further, thin band clip on mounts are ok, but LRP style large finned mounts, and Techra 'tunnel' mounts are not.
Any other cooling methods outside of those outlined above are not permitted.