Looks pretty good to me, actually the effective stab tilt is helping to
control the turn, I's leave it.
wombat
On Mon, Jan 23, 2017 at 8:36 AM, joshuawfinn_at_gmail.com
[Indoor_Construction] <Indoor_Construction_at_yahoogroups.com> wrote:
>
>
> Don,
>
>
> For a model flying on half winds that one looks to be producing about the
> expected performance. As others have said, definitely use a torque meter to
> get things dialed in good and close. If you don't take one, it doesn't take
> long to build one...maybe an hour. In one flying session you can get the
> information you need for basic contest flights.
>
>
> Now on to the more important bit: your student's model is flying well,
> looks to have adequate stability, and is trimmed out to a safe pattern.
> That said, the stab is tilted far too much, especially at launch. Check to
> make sure it isn't warped (probably washin on the left side) in a way
> that's causing the tilt to increase at high speeds. I would recommend
> reducing the stab tilt to 1/3 of what it currently is, as that's really
> eating into the efficiency of your tail surfaces. That amount of tilt would
> take 1/3 of the performance off of an F1D. It's that big of a deal. And you
> really don't need that tight of a turn. The model could circle much wider
> and still be safe, so once you fix that you should be in good shape.
>
>
> The conditions in your video were pretty rough. That's a lot of
> turbulence, and it shortens the model's flight time and reduces its climb
> performance for a given torque value. If the air is smooth at the contest,
> your student will need to reduce torque slightly to stay out of the rafters
> in comparison to the safe torque under the conditions in which you were
> practicing. Obviously you were going nowhere near the ceiling, so you don't
> know any of those torque numbers yet.
>
>
> Keep up the good work; your student should be a good competitive threat at
> the local contest.
>
>
> -jf
>
>
>
>
>
>
Received on Mon Jan 23 2017 - 08:56:12 CET
This archive was generated by Yannick on Sat Dec 14 2019 - 19:13:48 CET