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Eagle Tree Systems Onboard data loggers, telemetry, and OSD support |
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04-01-2010, 08:11 AM | #1 (permalink) |
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Wonderful to have logging while leaning an engine and setting pitch ranges
That pretty much sums it up. It is SO nice to be able to monitor engine RPMs, throttle movements and head temperatures while leaning a engine out, setting pitch curves and fiddling with governor settings. Seeing the actual in-flight temps is SO much better than using a finger on the backplate or using an IR temp gun on the head 15 seconds after landing!
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TRex 700NP | Align 91H | GP750/DS650 | 3xDS610+620 TRex 600NP | OS 50SX-H | GY401/S9254 | 3xS9252+S3151 TRex 450SEv2 | Medusa 28-32-3400 | Jeti33 | LTS2100/CS929MG | 3xHS65MG TRex 250SE | Scorp 3900kv | Phoenix 25 | Quark/3500G | 3xHS65KB |
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05-05-2010, 07:40 AM | #2 (permalink) |
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I got to do this the other day again with a new model. Wow, having real data is fantastic...!
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TRex 700NP | Align 91H | GP750/DS650 | 3xDS610+620 TRex 600NP | OS 50SX-H | GY401/S9254 | 3xS9252+S3151 TRex 450SEv2 | Medusa 28-32-3400 | Jeti33 | LTS2100/CS929MG | 3xHS65MG TRex 250SE | Scorp 3900kv | Phoenix 25 | Quark/3500G | 3xHS65KB |
05-05-2010, 09:07 AM | #3 (permalink) |
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I would really love to see some pictures of this in action! I really hate to not be able to tell real-temperatures, and have been thinking of getting the EagleTree logger since I first started.
Now Im getting one for my birthday present!
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700E DFC - Ikon 700N FBL - Ikon |
05-08-2010, 09:40 AM | #4 (permalink) |
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Examples
latte,
Here are three Eagle Tree Data Logger temperature graphs taken of break-in flights over the course of a week. With the logger and a netbook at the field, I was able to view the temp data on the ground and feel more confident about leaning the engine bit by bit. I otherwise would have been nervous - I had caused $150 in damage to an Align 91H from running it too lean earlier that month. You can see by the end of the 3rd flying day I got my OS50 dialed in about as lean as I would probably want to go. Actually I've richened it a click or two since then for good measure - the difference in power and fuel economy are negligable but I like the extra insurance of a cooler engine.
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TRex 700NP | Align 91H | GP750/DS650 | 3xDS610+620 TRex 600NP | OS 50SX-H | GY401/S9254 | 3xS9252+S3151 TRex 450SEv2 | Medusa 28-32-3400 | Jeti33 | LTS2100/CS929MG | 3xHS65MG TRex 250SE | Scorp 3900kv | Phoenix 25 | Quark/3500G | 3xHS65KB |
05-08-2010, 12:10 PM | #5 (permalink) |
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Thanks, that looks really nice!
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700E DFC - Ikon 700N FBL - Ikon |
05-08-2010, 12:29 PM | #6 (permalink) |
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Thanks! One thing to note is that my sensor is looped around the actual head and not the top of the crankcase throat recommended by some. That means that I'm measuring the hottest part of the engine and there is an expected temp increase at the end of each flight after the engine is shut down. If you can imagine, that removes the cool air source but it's OK because the piston isn't moving in the sleeve - what you're seeing is the latent combustion heat dissipating to the outside of the head. The main thing to look are the temperatures during flight. It's even cooler if you add a carb-smart because you can use the data logger to really dial in the ranges and to confirm it's working OK.
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TRex 700NP | Align 91H | GP750/DS650 | 3xDS610+620 TRex 600NP | OS 50SX-H | GY401/S9254 | 3xS9252+S3151 TRex 450SEv2 | Medusa 28-32-3400 | Jeti33 | LTS2100/CS929MG | 3xHS65MG TRex 250SE | Scorp 3900kv | Phoenix 25 | Quark/3500G | 3xHS65KB |
05-08-2010, 04:07 PM | #7 (permalink) |
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Thanks again! The images make even more sence with a bit of helpful explanation with it
You answered a couple of questions I was going to ask also! One was the temperature rise at the end, and secondly how and which sensor you used. Alright! Finally Im getting one as birthday present. I plan to monitor power draw from my fromeco Arizona reg/battery, rpm of the rotor, and of course the temperature on the motor. I am not sure how I will fit the optical rpm sensor yet, but I will have to make some sort of bracket which lets me aim for the mainshaft.
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700E DFC - Ikon 700N FBL - Ikon |
05-08-2010, 08:38 PM | #8 (permalink) |
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The mainshaft is very hard to get right with the optical sensor. FYI, Spektrum's magnetic crankcase sensor works great with a slight cable change ;-)
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TRex 700NP | Align 91H | GP750/DS650 | 3xDS610+620 TRex 600NP | OS 50SX-H | GY401/S9254 | 3xS9252+S3151 TRex 450SEv2 | Medusa 28-32-3400 | Jeti33 | LTS2100/CS929MG | 3xHS65MG TRex 250SE | Scorp 3900kv | Phoenix 25 | Quark/3500G | 3xHS65KB |
05-10-2010, 02:06 PM | #9 (permalink) |
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Would you like to share with us what changes to the spektrum sensor is required to get to work with ET?
Cheers Jaco
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Outrage Velocity 50 FBL - OS55 - Align DS610, BeastX + DS650, MGP, Perfect Regulators Igniter Push Button Glow and Flighttech 8A regulator T-Rex 600NP- OS50 - Align DS620, Spartan + DS650, MGP, SwitchGlo and Ely.Q reg T-Rex 450SE V2 with CC45 esc |
05-10-2010, 03:52 PM | #10 (permalink) | |
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Quote:
The Spektrum sensor's output is a standard servo plug that plugs directly into the AR7100R (though you can also use it for other governors). The black wire is ground, red is power and white/yellow is signal. Now, EagleTree decided to reverse the power and ground wires and you're not supposed to bridge power anyway, so the solution is this:
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TRex 700NP | Align 91H | GP750/DS650 | 3xDS610+620 TRex 600NP | OS 50SX-H | GY401/S9254 | 3xS9252+S3151 TRex 450SEv2 | Medusa 28-32-3400 | Jeti33 | LTS2100/CS929MG | 3xHS65MG TRex 250SE | Scorp 3900kv | Phoenix 25 | Quark/3500G | 3xHS65KB |
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06-21-2010, 07:16 AM | #11 (permalink) |
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Wow I have used the logger a few weeks now, and its really great to KNOW the numbers, and not just guessing it.
My temp-sensor was dead on arrival, so another two weeks without that, but I got some nice info about my electronics setup For example: I have futaba 9262 on cyclic, 9256 on tail. I measured about 380mAh from each tank, which is 8minutes and 30 seconds! Not bad! Now I had great success with chinese weights on my 450 model, so I fitted some on my 600 tail grips aswell. The current draw on each tank now, is under 200mAh! This is somewhat fun, because I couldnt infact notice any difference when I was flying, but the numbers prove, there was a significant change there! Now I just received my new temp-sensor, the hook and loop. But I have no idea how to attach it to my engine I am afraid to bust this one, as the last one seemed pretty fragile. |
06-05-2012, 10:27 PM | #12 (permalink) | |
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Join Date: Dec 2011
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Quote:
If I got it right, modification to spectrum sensor has to be done, even that I do not use the governor... |
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08-10-2012, 11:13 AM | #13 (permalink) |
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Join Date: Dec 2010
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nice
This is a great post. I am going buy one for sure…
I have been shy about tuning my OS 105, and YS 120 for fear of overheating them and causing big bucks in damage. I am very surprised how high the temperatures clime when the engine shuts off. It sure takes the guess work out of tuning. thanks |
08-22-2012, 05:25 AM | #14 (permalink) |
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Join Date: Feb 2009
Location: Montreal
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Can you show an example of a combined graph showing temperature, RPM and throttle servo position ? (this is what I would try to do).
In my case I have a AR7100R on to which I have substituted a standard magnetic governor sensor instead of the Spektrum mecanical one - can I simply Y-connect this into the logger ? |
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