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Hi Wayne, just a quick question
.Is a boat setup to operate as per the proposed Nzmpba rules regarding Kill switches and fail safes satisfy the Manawatu club.. Cheers Murray

Hi everyone, been down to the lake yesterday and it looks good for the offshore event on the 28th
So get your entries in
Cheers Trevor

Ok seems like we have two versions for ignition disabling/failsafes here as below.

Version 1 as per NZMPBA rules

Radio Control systems with an integrated Fail safe must use and demonstrate the operation of the Fail Safe during scrutineering with the engine running.
All Petrol powered boats must be protected against zero voltage receiver failure by using an ignition coil disabling system.
The effectiveness of the Ignition coil disabling system must be demonstrated
during scrutineering with the engine running by turning the receiver off, then the receiver must be turned back on, engine to be restarted and then the engine must stop when the Transmitter is turned off.

Version 2 as per Wairarapa club.

...fitted with an ignition coil disabling system. This is to be effective when either power is lost in the boat or loss of signal from the transmitter. The failsafe system must be demonstrated to work when either the transmitter is turned off or the the power in the boat turned off.

Can we have a ruling from Wairarapa. Which version(s) will be acceptable? 1 or 2 or is it just 2?

If it is version 2 only my boat won't comply and won't get past scrutineering. However I am version 1 compliant.

Please clarify position ASAP so that I will know whether to continue preparations and put an entry in. The entry form actually refers to version 1, the NZMPBA rules.

Peter Collier

Morning,

I'm lost in the jungle here.

Peters version 1. (NZMPBA) Rules says, 'The effectivenss of the Ignition coil disabling system must be demonstrated during scrutineering with the engine running by turning the receiver off, then the receiver must be turned back on, engine to be restarted and then the engine must stop when the Transmitter is turned off.

Peters version 2. (Wai. Club rules.)... fitted with an ignition coil disabling system. This is to be effective when either power is lost in the boat or loss of signal from the transmitter. The failsafe system must be demonstrated to work when either the transmitter is turned off or the power in the boat turned off.

What is the actual difference between these two rulings?

Both require it to be demonstrated that the coil disabling system is shown to work when either there is no powe in the boat or the transmitter is turned off.

Having a failsafe system which can be operated by, lets say, a third channel on the transmitter is useless if the transmitter is not working. The failsafe must work when signal to the boat is lost by, transmitter failure, being out of range, Signal failure or glitches, low battery power in boat, overdrawing of power in the boat if using high drain servo's, receiver failure, broken throttle linkage.

The ability to stop the boat by turning off the transmitter is by far the most the most important.

I hope this clears up any confusion,

Wayne.

Hi Wayne,

So to get out of the jungle.............

A boat (such as mine) where its failsafe/ignition disabling system is shown to work as follows.
1. Receiver power is turned off, motor stops due to ignition coil being disabled.
2. Transmitter is turned off and motor stops due to throttle being closed completely, but NOT due to ignition being cut.
3. Additionally, the ignition can be cut with a toggle switch above the throttle stick on the Transmitter that also doubles as the switch that fully closes the throttle from the idle position. This is used when stopping on return to bank after race. It also means ignition can also be killed out on the course if need be.

This complies with the updated NZMPBA rule.

Will this boat pass scrutineering at Wairarapa club events?

I think the answer to this will cover Murray's question as well.

Peter

PS. Incidentally I am using a Futaba FASST R617FS receiver on a Futaba T7C FASST Transmitter and the failsafe ONLY works on Channel 3, the throttle.