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Old 03-06-2007, 08:20 AM   #8 (permalink)
Troy Newman
Gettin' Lower!
 
Join Date: Jan 2006
Location: Goodyear, AZ
Posts: 64
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Default Re: Sequence Aresti Drawing

Bert See the answers below with your questions


Quote: Originally Posted by Bert vander Vecht
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I am afraid the Aresti drawing raises some more questions.

1) The way the starting sequence is connected to the first manouvre means that you get a double displacement in depth shift towards the pilot. Shouldn't this be the other way round?
A:
The way it is drawn is correct.

2) In manouvre 2 the goldfish part is shown as inverted flight (Dashed line). How do you go from level flight to inverted flight with a 1/4 roll? Same question for the exit, how do you go from inverted flight to inverted flight with a 1/4 roll?,

A: Yes it shown as inverted only because the loop portion of the goldfish is down elevator or a sort of negative G. The model is on Knife Edge using elevator to go through the "Dead" fish. So how do you go from inverted to inverted with a 1/4 roll. You don't the model is coming from Knife edge to inverted. to end the figure in #2 This can't be drawn with Aresti so I did what I could to illustrate it. The written description, of the figure needs to used for you to understand it. Basically the model rolls 1/4 roll to knife edge flight and then pitches negative G to a 45deg crossbox line, performs 2.5 rolls to the opposite knife edge flight, then pushes 5/8 of a horizontal circle and the model is using down elevator.

3) Manouvre 4. the entry into the torque roll. A quarter knife edge loop or a knife edge harrier where the altitude of the C of G of the aircraft must not change. (Like the FAI torque roll entry from level flight in the F3p program.)
A:
This is a judging question you should direct to the chief judge. My opinion and is only my opinion, is that it should be judged the same as the Torque roll in the F3P sequence the kfife edge harrier rotates into a torque roll with minimal to zero vertical altitude change. But this decision will not be made by me. So check with the event director and chief judge.

4) Manouvre 6. The way the Aresti is drawn you are required to keep changing heading during the snap rolls. This implies an unstalled condition of the airplane and thus a zero for the snap?
A:
The snaps must be stalled this is not an F3A model, and the speed on an indoor model is much slower. For the circle to be round you are absolutely correct, so you must do the best you can and the pilot performing it the best will recieve the best score. All pilots must live with this problem and overcome it. Snap roll criteria will not be sacrificed in order to maintain the circle. The pilot must adapt, and overcome.

5) Manouvre 7. It is drawn as a horizontal level 3/4 eight. Is it a banked manouvre or a side slipped manouvre? The 1/4 and 3/4 rolls on entry and exit as well as the half roll in the middle do not seem to fit in with the Aresti drawing?
A:
Again the model is on knife edge. and the loop portions are using elevator. Look at the notes saying the figure is veiwed from above.

6) Manouvre 10. It is drawn as a manouvre with a level, upright, entry and exit. how does it fit between the previous and following manouvres that end and start with inverted flight?

A: Yes it is drawn with a level upright entry and exit and should be inverted. This will be corrected on Rev1-2. This figure is also drawn from above and is a 90deg flat turn, on the cross box element 1 roll-1 opposite roll, then another 90 deg flat turn no bank

Thanks in advance,
Bert.