Re: Re: Are there too many Indoor events?

From: Tapio Linkosalo <tapio.linkosalo_at_iki.fi>
Date: Tue, 2 Feb 2016 07:35:08 +0200

On 1/2/2016 21:59, Nick Ray lasray_at_gmail.com [Indoor_Construction] wrote:
>
>
> Your question is the catalyst for a three screw VP. One for high
> pitch, one for low pitch, and one for the spring. If you keep good
> notes on the number of screw rotations, you can get most of the way
> back to where you started.
>
>
I think you could keep notes and adjust the same prop to different
conditions. However I feel that taking these notes would be quite
complex, as your notes would be the difference from one setting to
another, and any change in settings would change all differences.
Moreover, you might like different kind of springs (geometry) for
different altitudes.

For these reasons I prefer to have dedicated props for different
categories (esp. for Cat I and Cat II for F1M, for which I do most of my
flying), and just try to keep each prop optimal for those conditions.




> On Mon, Feb 1, 2016 at 1:43 PM, Rey Mazzocco aprivpilot_at_aol.com
> <mailto:aprivpilot_at_aol.com> [Indoor_Construction]
> <Indoor_Construction_at_yahoogroups.com
> <mailto:Indoor_Construction_at_yahoogroups.com>> wrote:
>
> Since I am just about to maiden my VP F1D, how do "you only need
> one model and one prop regardless of ceiling height"? I
> understand (I think) that the high pitch controls the climb
> height, but wouldn't the low pitch and spring rate need to be
> adjusted for different ceiling heights, too
>
>
In principal, yes. The spring pretension determines when the spring
"kicks in" or pitch decrease starts, and this is related to maximum
pitch of your prop. Also in lower ceiling it is typical to use a fatter
motor, which provides more torque, and hence the low pitch needs to be a
bit higher. Again I find it easier that most of the prop settings are
close to optimal for the category height, and I just need to touch the
high pitch and/or pretension slightly to adjust model for the present
conditions (ceiling height within category, temperature, turbulence etc.)






-Tapio-
Received on Mon Feb 01 2016 - 21:35:14 CET