RE: Electrical power source requirements for our jets
Heres one which will give you the idea. The top graph plots current and voltage and one can clearly see the relationship. The time base here is condensed to 1 min per division, this can be progressively expanded upto .1 sec per division for close analysis.
The second graph (you can create as many as you wish, add any or all parameters as desired) shows current against servo position, of course voltage could also be superimposed on this diagram too.
This is 2d format. With GPS you can create 3d track format and superimpose any data on THAT track diagram.
The two possible causes of Jack's crash are also addressed by the Weatronics system :
1. It automatically connects BOTH batteries with one switch on the larger receivers and;
2. It automatically performs a load check (brief application of 7 amps) at switch on. If either battery fails this check by exceeding the voltage drop which YOU set on Giga Control it illuminates a bright red LED on the switch panel.
Almost all conceivable data is streamed back to the Tx (parameters are sampled at .1 sec intervals !) and stored on the Tx SD card, (and integral SD card in the larger DRs) however on the Micros, Smart and Clever receivers, there is no current data as they have no regulators.
All this data (and programmability) is also a feature of the tiny 8ch Smart receiver which weighs all of 16 grams with an integrated gyro. It is a full range dual receiver with downlink and one is now installed in my Savex L39/ Wren 44 combo.
Brilliant equipment.
Plumb's assertations about powerful servos does not seem to be true. I tested a range of JR servos from 537s through to 6301 (33kg/cm) and 6311HVs (36.5 kg/cm at 7.4 v) all at 6v and all drew currents of around .12 amps with a 1 kilo load at 1.5cm arm EXCEPT the MP80T which is a powerful, 25kg/cm, brushless servo which drew significantly less current , around.05 amps than all other brushed servos, digital and analogue. In summary it seems correct to say that current draw is a function of torque actually being delivered rather than the torque a servo is capable of producing, certainly in the lower torque ranges.
Regards,
David.