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Old Feb 18, 2015, 05:52 PM
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For a warmliner setup I'd probably use a 4S battery and maybe downsize the prop a bit if needed.

Lenny
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Old Feb 18, 2015, 10:57 PM
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Why would you test it with a pack that only has a 50% charge? Do you typically fly that way, only charging the pack to 50%?
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Old Feb 19, 2015, 05:57 AM
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No, I was trying to see what the average output would be for the flight.
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Old Feb 19, 2015, 07:47 AM
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Oh, I see. Interesting approach. I would not have thought of that based on how I use my battery packs in e-gliders in competition.

Normally I only get one launch per pack per contest round. After I land the battery comes out, goes on a charger and I put in a fresh one. In a contest I am always launching on a full pack, so that is what I use to measure.

I use about 400 mah per launch and 10 minute flight, so about 30% of a 1300 or 50% of an 850 pack. During those launches my average charge state would be between 75 and 85% full charge status, approximately.
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Old Feb 19, 2015, 08:43 AM
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Yeah, I'm not flying competition with the Nike 2. I have thought about getting into F5J but it's typically too windy here to have good thermaling conditions. So my flights will be go up, glide down, repeat.

I also found the 840 kv motor on one of the ecalc's whereas I was only able to find the 1120 kv before and I need to track down where I was. The interesting thing is that it did say I would be stalling the prop at full throttle in a static position so I may be able to get much more power than what I'm measuring. The YEP doesn't have data logging. If I got into F5J, I'd probably look into one of the Castle ESC's to be able to down load the logs and tune my performance.
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Old Feb 19, 2015, 10:07 AM
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Thanks Ben. Understood. Since this is the Electric competition forum I expected that everyone posting in the discussion was flying and tuning for competition.
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Old Feb 21, 2015, 11:39 AM
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Quote:
Originally Posted by aeajr View Post
These are not part of the Gliderdrive family of motors but it they might fit some similar applications. These are inrunners.

Turnigy 540L V-Spec Inrunner - 36 mm
I had not seen this motor before. Looks like a nice fit for an e-glider.
http://www.hobbyking.com/hobbyking/s...idproduct=9449
...
Being inrunners they don't need clearance for the spinning can.
I own the 540 and some warnings:
- weight on site is wrong, it is much heavier 186 grams or so
- the shaft is not round, but beveled, most collet spinners can't grip
- the most horrible cogging I seen... very hard to control RPM under 25% throttle. Works fine on a switch, though.
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Old Feb 21, 2015, 11:42 AM
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Good to know. I was not aware of any of that. Really appreciate the info.

I presume you could file a flat spot on the shaft so a set screw spinner could hold.
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Old Mar 03, 2015, 01:41 PM
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Salangane with gliderDrive 1120 kv?

Thinking about putting in the 1120kv 830watt motor in the Salangane 2.2 m F3F warmliner/hotliner ~ 4lbs. .
3s 1800 65c lipo,, 12x10 folder... what do you think.. trying to keep is as light as possible but still have umphhhhh - Thanks Ed

I already have the 960kv motor in a 2.5 m 4lb. F3B sailplane w 12x10 and like it (same battery packs)
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Old Mar 23, 2015, 11:21 AM
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Originally Posted by ddruck View Post
That is why I need to do more tests, I prefer 3s and the motor is more efficient, I am going to try some 15" props and some 16 ". The E-flite prop is pretty narrow, there is a huge difference in props performance, even in the same size, depending on Manufacturer.

Sometimes power and watts are not everything. Currently I fly Polecat SkyDancer 3m, 57oz full house glider in ALES. The motor is Hyperion GS3020-12 at 782kv.
In my tests, showed best prop at 3s was 15x8 Aeronaut at 50A 520w. It was a rocket doing 200m at under 20seconds. Then I tried 15x6 Aeronaut 34A 380 w, it does 200m at 26 seconds, lot less stress on batteries and frame and I fly it that way all the time with nanotech A-spec 3s 1800 65c-130c. I can always prop up but it works so well I do not have the need and I keep up with all the local opposition in the climb.
How many climbes like that can you do without any risk of low battery?

BA
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Old Mar 23, 2015, 02:07 PM
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Originally Posted by fasteddie123 View Post
Thinking about putting in the 1120kv 830watt motor in the Salangane 2.2 m F3F warmliner/hotliner ~ 4lbs. .
3s 1800 65c lipo,, 12x10 folder... what do you think.. trying to keep is as light as possible but still have umphhhhh - Thanks Ed

I already have the 960kv motor in a 2.5 m 4lb. F3B sailplane w 12x10 and like it (same battery packs)
We did try today with a 14x9.5 Graupner prop on a Egida 3.7m climb with 13m/sec on 90A messured on hold. It was almost a vertical climb.

Willy
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Old Mar 23, 2015, 03:40 PM
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90 amps is WAY over spec for that motor. I think the max spec is 45 amps. I could see a 15 second burst to, maybe 60 amps if you are willing to risk it, but 90 amps? No way!

Fast Eddie, I think that would be a good fit. Just make sure you check the amp draw with a wattmeter or something else that will read amps. I am not opposed to pushing a motor but not to double its rated capacity.
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Old Mar 25, 2015, 01:13 PM
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Quote:
Originally Posted by aeajr View Post
90 amps is WAY over spec for that motor. I think the max spec is 45 amps. I could see a 15 second burst to, maybe 60 amps if you are willing to risk it, but 90 amps? No way!

Fast Eddie, I think that would be a good fit. Just make sure you check the amp draw with a wattmeter or something else that will read amps. I am not opposed to pushing a motor but not to double its rated capacity.
Yeah I think your correct. - I'll start off with a 12x8 and see what that does (with the 1120kv motor on 3s in the ~ 3lb Salangane 2.2 m ) ...

I do run a 12x10 with the 960kv motor on 3s - stays under 150F if I don't run more than 30 sec bursts.. ( 4lb - vintage f3b Dodgson Camano 2.5 m ) - eddie
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