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Eagle Tree Systems Onboard data loggers, telemetry, and OSD support |
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04-19-2009, 07:55 PM | #1 (permalink) |
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Join Date: Aug 2007
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Eagle Tree E-Logger
i have been wanting to get this elogger for quite some time, but couldn't figure out if its really useful, so everytime i end up buying a another lipo with that money. so need you guys to help me out, is it really that neccessary? I understand that there are many optional add-on accessories, but which ones are those that is really required? Also, i m not very good at graphs, but then this thing plot out graphs rite? how can we learnt to study from the graphs?
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04-19-2009, 08:46 PM | #2 (permalink) |
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The Logger itself will log Amps,Watts,mAH used and flight time plus alot more. one of the most useful add ons is the RPM sensor which is a powerful setup tool in itself. When downloaded to your computer it will graph the desired info for you to see and make adjustments from. See example
https://www.helifreak.com/attachment...2&d=1237808296 I
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04-19-2009, 09:03 PM | #3 (permalink) |
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Join Date: Aug 2007
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i guess thats my problem, so the supplied graph, how do u figure out what it means, and whats useful here?
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04-20-2009, 01:01 AM | #4 (permalink) |
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I was considering the Eagle Tree w/ optional RPM sensor instead of a simple tachometer.
But I just replaced my cyclic servos w/ HS 65 MGs, so now I don't have to worry about the above choice. (broke!) Anyways, from that sample graph, one could interpret...
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04-20-2009, 01:39 AM | #5 (permalink) |
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Thread Starter
Join Date: Aug 2007
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man how did u guys learn to read from the graph??? thats insane!!! its also the main reason i didn't buy one. well, i guess i shd get one and post it here so that anyone can help me determine. thx pal
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04-20-2009, 12:35 PM | #6 (permalink) | |
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Join Date: Jan 2008
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Quote:
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04-24-2009, 12:57 PM | #7 (permalink) |
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Join Date: Mar 2009
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My question is how many flights can an Eagle Tree log if I'm logging what was shown in the example? I ask because I wonder if I'll need a laptop to download the Eagle Tree from time to time out at the field.
-- TotalNewbie |
04-24-2009, 04:50 PM | #8 (permalink) |
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If you just logged Volts, Amps & RPM like the the example, you could log quite a few sessions before needing to download to the PC. How many would depend on the logging rate.
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04-24-2009, 07:34 PM | #9 (permalink) |
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Thread Starter
Join Date: Aug 2007
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think most probably will get the watt meter, its easier to read.
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04-25-2009, 01:31 PM | #10 (permalink) |
Join Date: Mar 2009
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Howdy,
Not much to add to this great discussion, other than to point out (sorry if this has been pointed out before) that you can connect our "PowerPanel" LCD Display to the eLogger, to get the best of both worlds: The LCD can be plugged in after your flight or left attached to your heli, and can be programmed to display whatever you want it to. Then, if you decide later you do want to download the full flight, that's always available. |
05-15-2009, 04:58 PM | #11 (permalink) |
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More volts?
Given the constantly high current draw shown in the graph, I would recommend this pilot consider going up another cell or 2 in the pack. For example, if it is a 6s, an 8s might give much better performance without a large weight penalty.
Look about 1/2 way between 1 and 1.5 minutes. See the peak amps about 114 and the volts dip to about 20 volts. Lets convert that to watts: 114 * 20 = 2280 Now if we went up to 8 cells lets look at that: 20 volts / 6 cells = 3.33 volts per cell So lets add 6.66 (3.33 * 2 more cells) to 20 we get 26.66 volts. Now divide that by 2280 watts. 2280 / 26.66 = 85.5 amps. So for the same power draw we cut the amps from 114 to 85.5. The puts much less stress on the batteries, ESC and motor. Now of course it is not this simple because the heli would be a bit heavier and the motor will need to have a lower Kv. But with the way this pilot is pushing this model, I think more power is needed. Last edited by jrohland; 05-16-2009 at 09:54 AM.. |
05-16-2009, 01:14 PM | #12 (permalink) |
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I have a question about the LCD display.... I like how it shows cumulative mAh as it'd give me a good sense of whether I should change batteries (i.e., at 1800 mAh consumed) but....
does it automatically reset when batteries are changed -- or is there a reset button? Cuz otherwise I'd have to remember that battery #2 has to get changed out at 3600 cumulative mAh and battery #3 .... oh... .my head hurts. K
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