Re: Re: Exact Builder of Model Rule

From: Jake Palmer <82.jake_at_gmail.com>
Date: Thu, 30 Jan 2014 10:27:23 -0800

Not to be a downer, but a carbon fiber motor tube won't work for F1D.
 Carbon fiber has a density somewhere around 100 pounds per cubic foot. To
get even close to a comparable weight you would need a wall thickness
around .0005". Even a smaller diameter tube won't get you close enough to
matter.


On Wed, Jan 29, 2014 at 7:22 PM, Don Slusarczyk <don_at_slusarczyk.com> wrote:

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> and if legal, buying it, too.
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> Kang,
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> I never really looked at the FAI definition until posted here. What it
> says it not what I thought it said. I think the FAI rule is vague enough
> to allow the buying of parts, many parts actually. The AMA goes an extra
> step to try and define "constructed". The FAI rule says you have to be the
> "builder", and no further explanation so by dictionary definition a
> builder means "one who builds", then builds means "to make (something) by
> putting together parts or materials". Interstingly "assemle" is "to connect
> or put together the parts of (something, such as a toy or machine)" so I
> would interpret as some building is required as opposed to simple assembly
> or connecting of premade parts (similar to what the AMA calls out as not
> allowed). So buying a hub and adding prop blades to it would to me seem
> legal under the FAI definition same with buying a premade prop outline as
> it would require additional building to add the ribs, cover, and connect to
> the VP hub. If the prop blades were all premade and just required assembly
> (plugged into the hub) then I would think it is not allowed by the FAI. So
> I would think more prefab is OK for F1D where AMA does not allow the same
> prefab level with the "average kit" wording. So like I was saying before If
> you buy prefab F1D parts and want to fly AMA HLS with the same model it
> would be FAI legal but AMA illegal. I have to admit my gut reaction to
> buying VP hubs and prop outlines for F1D was it was a BOM violation but I
> was applying the AMA definition as I understood it, but the FAI definition
> being vague to me allows more leniency. Personally I would not be in
> support of allowing purchased premade VP hubs but the FAI rule as currently
> written does not guide me enough (speaking on a CD basis) to disqualify its
> use for F1D, F1M, or F1R at a contest.
>
> Don S
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Received on Thu Jan 30 2014 - 10:27:24 CET