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Author Topic: rules for electric f2b  (Read 871 times)

Offline paul winter

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rules for electric f2b
« on: April 07, 2013, 03:49:55 AM »
can anyone point me in the direction for the rules for electric f2b competitions in the USA and England
also are arming plugs compulsory
Paul

Offline PerttiMe

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Re: rules for electric f2b
« Reply #1 on: April 07, 2013, 04:22:26 AM »
F2B rules are F2B rules: part of FAI Sporting Code:
http://www.fai.org/fai-documents

section for Control Line:
http://www.fai.org/downloads/ciam/SC4_Vol_F2_ControlLine_2013

I think FAI rules are mainly not adhered to in USA. Better look towards AMA?
I built a Blue Pants as a kid. Wish I still had it. Might even learn to fly it.

Offline paul winter

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Re: rules for electric f2b
« Reply #2 on: April 07, 2013, 06:00:05 AM »
hi thanks for the info ,but still not what i want ...
pw

Offline MikeCoulombe

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Re: rules for electric f2b
« Reply #3 on: April 07, 2013, 10:44:37 AM »
Hi Paul
That is a good question, arming plugs? Are they really necessary? I mean do you need the added weight and does the convenience out weigh the expense (weight)?
I think they should be optional, I agree with the convenience of not fiddling with a battery hatch on the flight line, but a well designed access set up shouldn't interfere with the 3 minute prep rule.
I did find this link at the AMA site, and don't see a mention of arming plugs.
http://www.modelaircraft.org/files/2011-2012CLAerobatics2.pdf

Offline Mark Scarborough

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Re: rules for electric f2b
« Reply #4 on: April 07, 2013, 11:21:10 AM »
Mike, those are the rules for 2011-2012. There is an updated set of rules, and I beleive that the arming plug is now mandatory.
I am a believer in having an arming plug. when your helper is present, he can disarm the airframe before leaving the circle,
The goal ( there was a lengthy thread on this earlier) is to prevent armed airplanes sitting in the pits which through an unlikely electronic failure, could fail in a "running" mode,, which would get ugly,,
For years the rat race had me going around in circles, Now I do it for fun!
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Offline PerttiMe

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Re: rules for electric f2b
« Reply #5 on: April 07, 2013, 11:42:16 AM »
I don't see any mention of arming plugs in the FAI rules.

The only electric-specific rules I found are 42V max unloaded current (lower than other model classes), and "For power sources other than piston engines, engine power controlling systems, whether pilot operated or automatic, shall be permitted" (not by wireless remote systems).

In the General Section of FAI Aeromodelling rules ( http://www.fai.org/downloads/ciam/SC4_Vol_ABR_2013 ) 2.4
GHz Spread Spectrum technology is allowed for "permanent shutdown of the engine(s)".
I built a Blue Pants as a kid. Wish I still had it. Might even learn to fly it.

Offline MikeCoulombe

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Re: rules for electric f2b
« Reply #6 on: April 07, 2013, 08:35:55 PM »
Mark, you are correct I posted the previous year, sorry.
http://www.modelaircraft.org/files/2013-2014CLAerobatics.pdf
I did look up the current year and found this quote.
3.2
All aircraft that use electric propulsion shall have a positive arming device that, that when disarmed, mechanically prevents battery power from being applied to the motor. This may be (but is not limited to) a switch, the existing battery plug, or arming plug, but must be in series with the main power line(s) from the battery and mechanically disconnect the battery from the motor. Relying on the timer, timer start switch, flight programmer, or any other low-level logic signal for this function is specifically excluded. The model shall be restrained at all times while the system is armed, either by the pilot (including holding the handle before, during, or after an official flight), an assistant, or mechanical restraint device (e.g. stooge). The device must be disarmed after flight before the airplane is left unrestrained. Failing to restrain the model while still armed during an official flight attempt shall result in official flight with a score of 0. The system may be armed in the pits as long as it is restrained at all times.

I don't see where arming plugs are mandatory, what I see is that you must be able to disconnect the power to the motor.
Not trying to ruffle any feathers. I would like to know what the requirements are so if I attend a competition in the US will my airplane comply!


Offline Tim Wescott

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Re: rules for electric f2b
« Reply #7 on: April 07, 2013, 09:51:11 PM »
The rule is what the rule is.  In the original discussion I think that it was proposed that arming plugs be compulsory, but the originator of the rule (Brett Buck) saw that what what's important is that the battery be disconnected.

So arming plugs aren't compulsory.  Just convenient on a full-fuselage model.
AMA 64232

The problem with electric is that once you get the smoke generator and sound system installed, the plane is too heavy.


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