[NSRCA-discussion] Weight History

[Vicente Bortone]

I think the 5 kg is the international definition of model airplane.    I
think for world record recording the model has to be below 5 kg.   Probably
a reason why we got the 5 Kg.


On Fri, Jan 27, 2017 at 1:07 PM Dave Burton via NSRCA-discussion <
nsrca-discussion at lists.nsrca.org> wrote:

> My memory is a little fuzzy on this  but I seem to remember a square inch
> rule back in the 70's or early 80's. It may have applied only to FAI class
> but that's fuzzy too. "Back in the day" FAI was never flown in local
> contest or NATS, only at team selection time. Local contest started
> including FAI as turn around sequences came about because pilots (some)
> wanted to try turnaround and the guys flying for a spot on the team wanted
> more FAI flights in contest.
>
>
>
> *From:* NSRCA-discussion [mailto:nsrca-discussion-bounces at lists.nsrca.org]
> *On Behalf Of *John Fuqua via NSRCA-discussion
> *Sent:* Friday, January 27, 2017 1:47 PM
> *To:* 'General pattern discussion'
> *Subject:* [NSRCA-discussion] Weight History
>
>
>
> It is interesting to look back at the history of weight and displacement
> limits.
>
>
>
> Up until 1966 there were no engine displacement limits and allowable
> weight was 15 pounds.
>
>
>
> In 1966 a .61 cubic inch displacement limit was imposed with an allowable
> weight of 15 pounds.   Of course nobody could weigh that much and have any
> performance given the displacement limit.
>
>
>
> In 1980 a weight limit of 5 kg was implemented but again nobody wanted to
> be that heavy because of power limitation.
>
>
>
> In 1984 the limit for 4 strokes was raised to 1.20 cu inches and airplanes
> started to change.
>
>
>
> In 1992 a noise limit was imposed.
>
>
>
> In 1994 engine displacement limits were eliminated and 4 strokes ruled
> until the electric era.
>
>
>
> In 1996 the 2 meter rule was introduced.
>
>
>
> Each change brought about airplane changes.   Bigger, more power but still
> at 5 kg.
>
>
>
> So for 37 years (1980 until now)  the weight limit has been the same.
> Seems to me like we adapted pretty well over the years.
>
>
>
>
>
>
>
> John Fuqua
>
> cell 850-974-6655
>
>
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-- 
Vicente "Vince" Bortone
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