SEN 3259
- In search of a F1Q models for a Junior competitor.
- Energy-based early functions in Q.
- Harvest Classic Report and results
In search of a F1Q models for a Junior competitor.
From: Sevak Malkhasyan
Please reach out with suggestions, pictures and $$$.
With F1Q becoming an official World Champs event, all suppliers are backed up with orders for months.
Sevak Malkhasyan
323 – 394 -3424
gtsfreeflight@gmail.com
Energy-based early functions in Q.From: Aram Schlosberg
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I asked Massimo Ursicinio from freeflight electronics about enabling the energy limiter (EL) in a Q model to send a pre-motor-cutoff signal, defined in terms of energy to the eTimer, just like is send a signal when the model’s energy budget is depleted. A pre-motor-cutoff could be used to kick in the rudder or slow down the motor, when say 95% of the model’s energy budget has been reached.
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In a Q, the actual length of the motor run has a random component, depending on the battery’s characteristics and charge, the ambient temperature and the model’s climb pattern. The motor run will also be terminated by the eTimer if the motor run ceiling breached first.
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Suppose that the early function is set to say 18 seconds by the eTimer, it will be in effect between 0 and 2 seconds — depending whether the EL sent a signal before 18 seconds, between 18 and 20 seconds or above 20 seconds respectively. In other words, its length and effectiveness will vary each flight.
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In contrast, if the early-function is defined in terms of the ENERGY used, say 95% of the total budget energy and if the actual motor run is up to 20 seconds, then the time interval of the early cutoff function will be consistent across flights.
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Although Massimo thinks early functions are an interesting and useful idea, he claims it violates the prohibition on closed-loop-control-loops in free flight models.
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But closed-loop-control-loops require a SENSOR measuring things like altitude, acceleration, pitch etc that are used to control the model. Obviously, this does not apply to an EL, which is preset before the model is launched.
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Since ELs’ energy based motor termination signals are legal, the same apply to energy based early-function signals. Hopefully, they will be implemented soon. ///
Editorial Comment
Aram, it is my understanding that Massimo is the CIAM FFTSC’s Electronic expert, perhaps the USA TSC or FAI FF committee should ask the FFTS for an official ruling as this should be done before any development resources are wasted ? I do agree with you that this does not seem to be a true closed loop.
Harvest Classic Report
Harvest Classic
John Clapp Memorial
American Cup/National Cup
Wawaywanda, NY
September 14-15 2024
The weather was exceptional — cool and calm, with the drift down the field from the northeast. Since the first segment at north end of the field was freshly planted, we had to use golf carts to reach the center to launch from. A few flights landed in the edge of the corn on the west.
Of note is the A altimeter flyoff between the Barrons on Sunday with a 4-minute max. The altitudes were read from the All-Tee altimeters in two brand new A models. I had a wing detach from a Q model in climb, on a trimming flight after the contest. Evidently, the solid carbon 5 mm rod was already damaged in a previous hard landing.
Don Rousseau made Dawn Unlimited flight with a brand-new model. Kent Weaver made his first visit to the field from Pennsylvania. Andrew was a very helpful assistant CD. We usually held this contest in October, but moved shifted it forward because of the Finals next month at Lost Hills.
Aram Schlosberg
Harvest Classic 2024
September 14,15, Wawaywanda NY
Flyoffs
1 2 3 4 5 EventTotal Contestant Time meters
180 180 180 180 180 A 900 Peter Barron 240 66
180 180 180 180 180 A 900 Andrew Barron 240 42
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150 150 150 150 150 B 750 Ron Felix
150 DNF 150 150 150 B 600 Aram Schlosberg
45 40 90 47 47 B 269 Jerry Gross
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120 120 120 87 67 G 514 Bill Buss
97 120 101 107 71 G 496 Don Rousseau
65 120 43 77 98 G 403 Jerry Gross
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H 34 Larry Pelatowski
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180 180 180 180 180 Q 900 Yuda Avla
180 168 180 180 160 Q 868 Aram Schlosberg
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120 120 120 E36 360 Drake Hooke 127
120 120 120 E36 360 Maria Noldy 66
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120 120 120 B-elc 360 Drake Hooke
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44 35 41 CatG 120 Kent Weaver
21 51 CatG 72 Ben Schultz
27 16 22 CatG 65 Jerry Gross
4 4 4 CatG 12Larry Pelatowski
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120 105 120 P30 345 Bill Buss
90 85 118 P30 29 3Don Rousseau
120 60 102 P30 282 Vic Nippert
120 57 75 P30 252 Gerald Gross
80 110DNF P30 190 Ian Hurly
32 47 89 P30 168 Kent Weaver
87DNF DNF P30 87 Larry Pelatowski
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56 120 39 HLG 215 Kent Weaver
71 96 34 HLG 201 Larry Pelatowski
51 18 10 HLG 79 Ben Schultz
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DawnU 96 Don Rousseau
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