Re: Re: Analysis of the new F1D rules

From: Fred or Judy Rash <frash_at_chartertn.net>
Date: Fri, 02 May 2014 22:11:32 -0400

There is an electric indoor FF duration event (Event 221). It is a fun
event, but usually needs more contestants. Build something for this
event, fly it at the Kibbie Dome, and help to keep the event alive. Ray
Harlan holds the records and his design appears in a fairly recent NFFS
Sympo as a model of the year. Rules are one 10-mAhr LiPo and max AUW of
10g. Otherwise design is unrestricted.

Try something lighter and larger than a Limited Pennyplane with 1 or 2
stages of gearing.

Most of you probably know this already.

Fred Rash

On 5/2/2014 9:45 PM, leop_at_lyradev.com wrote:
>
> It is interesting that Don suggests using a small LiPo cell to rewind
> the rubber motor. A 400mg 5/99 motor has about 5 joules of stored
> energy when fully wound. A 10 mAH LiPo cell holds just over 130
> joules of stored energy when fully charged. The currently available
> 10 mAH LiPo cells weigh just under 400mg. We could just leave most
> of the weight off the rubber motor and just use electric power to
> continually rewind a small motor on a new rules FUD plane. The
> smallest brushless micro motors currently weigh 235mg. One might just
> use the extra 200mg for an electric motor and drive the prop through a
> short motor that is continually rewound. Even with a great deal of
> inefficiency, this would sure throw a monkey wrench into shortening
> the flight times.
>
>
> Just some idle thoughts,
>
> LeoP
>
>
Received on Fri May 02 2014 - 19:11:31 CEST