Re: RE: Rubber comnparison

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From: Phedon Tsiknopoulos <phedon21t_at_yahoo.com>
Date: Tue, 11 Feb 2014 02:36:05 -0800

What if we have variable pitch as well as variable diameter?

Sent from my iPhone

On Feb 11, 2014, at 1:32 AM, Tapio Linkosalo <tapio.linkosalo_at_iki.fi> wrote:

>
> On Tue, Feb 11, 2014 at 11:01 AM, Phedon Tsiknopoulos <phedon21t_at_yahoo.com> wrote:
>>
>> So according to you high energy release is a bad thing.
>> What if one can harness that high energy release and start doing 50 minutes plus with an F1D, how would you feel then?
>
> I would feel amazed. The reason is that a typical propeller can be optimized to one pitch only. VP's have the drawback that when the pitch changes from the design value, the efficiency of prop comes considerably down. Flying an F1D for 50min plus on SS rubber would indicate that you have been able to build a prop that has high efficiency on a large range of pitch values. No-one has so far been able to do that.
>
> So go ahead, amaze me!
>
>
>
>
> -Tapio-
>
>
> Ps. What Jake said was not that high energy release is bad, but that high variation in the torque vs. turns is a bad thing. Or, difficult to utilize.
>
Received on Tue Feb 11 2014 - 02:36:07 CET