SEN 2300 3 May 2017

Table of Contents – SEN 2300


  1. Motors and more motors
  2. Which one first ?
  3. Who's Altimeter is that ?

Motors and more motors

Regarding the rule change to allow F1B flyers to wind one motor before the flyoff starts.

I have no problem with this but in my opinion the rule needs extra clarification.

1, It says that we can wind ONE motor before the flyoff starts.

     What if I do not 'like' this motor, can I discard it and wind another?

2, How long before can I wind  my extra motor, is the one that I wound 'earlier' included?   I have been winding them all day.


3, Who checks how many motors I have?

Sorry to be pedantic but during those frantic seven minutes a 'hidden' extra  wound motor could be very useful.

Of course I would not stoop to this sort of behavior but then again.............

Peter Brown


Which one first ?


From:Richard Blackam

Hi Roger,

reading this new rule is interesting...

What if the flyer winds and breaks the motor? Is he then allowed to wind another 'first motor" before the round? I can imagine it being interpreted differently by organisers in different jurisdictions.
On 3 May 2017, at 9:16 AM, SEN <This email address is being protected from spambots. You need JavaScript enabled to view it.> wrote:

c) The organiser will establish a 7 minute period during which all fly-off competitors must launch their model. Competitors may wind one rubber motor before the start of the 7 minute period.



Who's Altimeter is that ?


Sheriff SCAT,

In practice, how will a jury confirm if an altimeter trace is from a particular competitor's model ? The unscrupulous could easily swap an altimeter in order to help a fellow competitor gain an advantage and similarly a protest could nullify a legitimate altimeter flight.


Editor’s note : I think I have had enough of this Sheriffing stuff.