Helo again,
Sorry for late explanation, but our Christmas hollydays are somewhat diferently timed than on the West.
To forget different linguistic excursions (thank you, Nick, for clarification) and to better explain my intention, a scheme is added ("Steering by the pole").
It might happens, for example in the Belgrade Hall, that a modeller, launching close to the fence (visible on some photos) might need to steer in the first minute of flight, or so. If he is steering with fishing pole, and keeping it at angle (as presented in the scheme), applying to the horizontal stab LE, he might actually help overtorqued model to be trimmed-down. I do not discuss different other possibilities, as, for example, touching the tail boom, as this will lead us into lateral-longitudinal stability problems, which are dificult to explain, and are very much depending of the specific model design. Nor I am discussing the change of the pole angle, while in contact with the horizontal stab LE !
So, the praxis up to now is that:
- one may steer any time, in order to avoid collision,
- one may steer, applying to the horizontal stabilizer LE and
- this may lead to the model trimming, instead of only steering, if the pole is at an important angle from vertical (notwhistanding the other possibilities).
The rules, for example this one:
"Note: If, in a timekeeper's opinion, a model's altitude change is
approaching one half metre, or one metre for each 25 m of altitude
(whichever is larger) he will warn the competitor. Continued disregard of the timekeeper's warning will result in a terminated flight."
is mostly addresing to the baloon steering, as I do believe one cannot change model altitude using fishing pole (unles applying some surface treatment to the pole, which (itself) would be the reason for disqualification).
Hoping that my intentions are somewhat more clear,
Vladimir
--- In Indoor_Construction_at_yahoogroups.com, Tapio Linkosalo <tapio.linkosalo@...> wrote:
>
> john_kagan wrote:
>
> > But, whatever, angled Angler sticks...I agree with Don's assessment that
> > allowing competitors to use a pole to steer the tailboom has made it
> > easier to use steering to save a stalling model. I've seen wallowing
> > models get dragged by the prop, too. It's just harder to do. Similarly,
> > I think I could de-stall a model with a vertical pole. Just not as
> > easily as pushing up on the tail.
> >
> > Ethics are difficult to enforce. Which leaves us with trying to get the
> > rules to produce the desired results.
>
> I agree with John, in that 1) you can steer to avoid stalls also from
> the prop, and 2) that ethics are hard to enforce in rules. Further, I'm
> not sure if setting the pole angle is the right solution. Consider, for
> instance, that you have set your pole to steer at 10 meters (30'), but
> all of a sudden you realize that you need to steer before your model has
> climbed that high. So what you do, but steer with longer pole, possibly
> at angle? Quite "ethical", but against the proposed rules.
>
> Let's see what the (FAI) rules say:
>
> "Steering must only be used to avert collision with the structure of the
> building, its contents or other models. Movements of the model must be
> primarily in a horizontal plane."
>
> So there it is! The rules quite clearly say that you can _only_ steer to
> avoid collision. In other words, steering to cure trim problems _is_
> prohibited.
>
> The question remains, how to enforce this. Here, let me remind you that
> the quote from the rules, as above, goes on:
>
> "Note: If, in a timekeeper's opinion, a model's altitude change is
> approaching one half metre, or one metre for each 25 m of altitude
> (whichever is larger) he will warn the competitor. Continued disregard
> of the timekeeper's warning will result in a terminated flight."
>
> The timekeeper is already given the power, even encouraged, to make sure
> that the flier does not change the altitude of the model while steering.
> Wouldn't it be simplest to interpret the rules, or change the wording to
> be more spesific, that it is also the _timekeeper_ that shall make sure
> that the model is not steered with illegal aims, and then give warnings
> or disqualify the flight if the fliers insists on doing it the wrong
> way? I think all these suggestions of rod angles, time limits when not
> to steer, etc., are too complicated and arbitrary solutions to the
> actual problem.
>
>
>
> -Tapio-
>
Received on Sun Jan 24 2010 - 00:51:46 CET
This archive was generated by Yannick on Sat Dec 14 2019 - 19:13:45 CET