Re: Idea for a New Event [1 Attachment]

From: Nick Ray <lasray_at_gmail.com>
Date: Fri, 19 Feb 2016 21:26:05 -0500

Interesting,

Kang, do you feel your F1D flight was twice the feat that your Ezb record
was? My gut reaction is that this way of comparing flights is like
comparing apples and oranges because what makes the two flights difficult
is quite different.

On Fri, Feb 19, 2016 at 8:47 PM, ykleetx_at_gmail.com [Indoor_Construction] <
Indoor_Construction_at_yahoogroups.com> wrote:

>
> [Attachment(s) <#1260184458_TopText> from ykleetx_at_gmail.com
> [Indoor_Construction] included below]
>
> Without going into too much detail, we can consider the efficiency of a
> model and its use of rubber as the "power factor" of the model, or CL^1.5
> /CD. I computed this efficiency factor for four record flights:
>
> - EZB
> - 1.4g F1D
> - Brown HLS
> - Kagan HLS
>
> The results are attached. (Please let me know if the attachment doesn't
> come through.)
>
> The formula for this efficiency is as follows:
>
> Time / W_rubber * SQRT( W_total / S_total ) * W_total
>
> Time = flight time in minutes
> W_rubber = weight of rubber in g
> W_total = weight of rubber + weight of model in g
> S_total = total wing AND stab area
>
>
>
>
Received on Fri Feb 19 2016 - 18:26:06 CET