[NSRCA-discussion] Great Planes spinner

[Ron Van Putte]

I don't remember that the decision to weigh electric-powered  
airplanes with batteries was the result of a rule change.  I think it  
was an interpretation of the weight rule by an AMA official.

Ron

On Jun 3, 2009, at 11:02 PM, Verne Koester wrote:

> " For some reason, back in ancient AMA history, getting hit by a
> protruding prop shaft was viewed as a bad thing.  Why that is worse
> than a spinning prop, I don't know.  There were also sharp, needle  
> nose
> spinners available, which were pretty dangerous."
>
> Must have been back in the same rules cycle where they decided to  
> weigh electric planes with the batteries....   ;>)
>
> Verne
>
> -----Original Message-----
> From: nsrca-discussion-bounces at lists.nsrca.org [mailto:nsrca- 
> discussion-bounces at lists.nsrca.org] On Behalf Of Jon Lowe
> Sent: Wednesday, June 03, 2009 11:27 PM
> To: nsrca-discussion at lists.nsrca.org
> Subject: Re: [NSRCA-discussion] Great Planes spinner
>
> Does this even apply to you guys in FAI?  I read the FAI safety code,
> here, http://www.fai.org/aeromodelling/documents/safety_rules, and
> rounded spinners or prop nuts are under the "recommended", not  
> required
> section.  AMA requires 3mm radius of point, whatever that means.
> Looking at the 3.25 spinner on the Tower website, it probably meets  
> the
> AMA rule, at least the intent.
>
> For some reason, back in ancient AMA history, getting hit by a
> protruding prop shaft was viewed as a bad thing.  Why that is worse
> than a spinning prop, I don't know.  There were also sharp, needle  
> nose
> spinners available, which were pretty dangerous.
>
> Jon Lowe
>
>
> -----Original Message-----
> From: Michael Wickizer <mwickizer at msn.com>
> To: NSRCA Mailing List <nsrca-discussion at lists.nsrca.org>
> Sent: Wed, 3 Jun 2009 10:58 am
> Subject: [NSRCA-discussion] Great Planes spinner
>
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> I've looked at these before and in fact have used them on electric
> setups and have seen others use them on glow setups.
>
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>
> My question / concern was that the nose was too pointed and didn't  
> meet
> the minimum radius required.  It is very possible I don't really
> understand the rule or how to measure it.
>
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>
> Any thoughts?
> =
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> 0D
>
>
>
>
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