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Old Nov 06, 2011, 03:45 PM
Wanton construction
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Stockholm Sweden
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Quote:
Originally Posted by Nooflyer View Post
BryanEW710,

I'll probably put an AP03 with the 3.5a .3g esc in it. Not sure what prop i should use. But i know i'll stay with single cells.
I'd be interested in knowing more about this single cell ESC, I've recently completed a 30 cm stryker using a HK 2 gram outrunner and a HK 3A ESC but experienced some difficulties as the ESC would shut down after a few seconds at full throttle?

http://www.rcgroups.com/forums/showthread.php?t=1534571
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Old Nov 06, 2011, 04:05 PM
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United States, GA, Buford
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Quote:
Originally Posted by Nooflyer View Post
BryanEW710,

I'll probably put an AP03 with the 3.5a .3g esc in it. Not sure what prop i should use. But i know i'll stay with single cells.
Throw a 4025 on it.

Quote:
Originally Posted by Pouncer View Post
I'd be interested in knowing more about this single cell ESC, I've recently completed a 30 cm stryker using a HK 2 gram outrunner and a HK 3A ESC but experienced some difficulties as the ESC would shut down after a few seconds at full throttle?

http://www.rcgroups.com/forums/showthread.php?t=1534571
http://www.hobbyking.com/hobbyking/s..._ESC_3_5A.html
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Old Nov 06, 2011, 05:40 PM
Nothing flies like a Pitts
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Stockholm, Sweden
Joined Aug 2006
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Originally Posted by seitz2c View Post
The maiden went well just slightly nose heavy. so i'm calling it done! I ended up at 38 grams

Paul
Awsome, could you tell me a bit more about the materials being used?

/Ryde
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Old Nov 06, 2011, 07:34 PM
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boredom.is.me,
thanks i'll try that as i feel the 3020 prop would be speedy!
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Old Nov 08, 2011, 02:53 PM
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Recieved my 3.5a esc but i'm still having issues. Are these esc programmable, if so is there a manual somewhere? thanks
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Old Nov 08, 2011, 03:01 PM
"Unnecessary Necessity"
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Canada, QC, Quebec City
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Her is the manual for that esc:
http://www.hobbyking.com/hobbyking/s...X246741X34.pdf
For many HK products the manual can be found when you click on "Files"
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Old Nov 08, 2011, 03:09 PM
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thank you, coriolan
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Old Nov 08, 2011, 03:10 PM
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Nooflyer,

What issues are you having? Not everything can be solved by programming the ESC.

What motor (and Kv version, if appropriate) and what prop are you using? Are you able to measure the current (and ideally, the battery voltage at the same time)? Maybe you've over propped it.
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Old Nov 08, 2011, 03:37 PM
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I'm using an Ap03 7000kv with the new .3g 3.5a esc and a 4025 prop.
The issue i'm having is not enough with a brand new 150mah 25c single cell batt., with the brushed motor in my yak 55m i'm getting 1.5 to 1 aspect ratio. But with the brushless i'm getting maybe 1:1 thrust.
Basically i have to be full throttle to hover. I was told to put an 4025 prop on for 3d and that hasnt worked out. I know 3020 prop is recommended but i'm not after speed.
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Old Nov 08, 2011, 04:05 PM
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I see, Nooflyer. I think that's really the wrong motor for the job, and it probably draws too much current with a 4025. The 4200Kv version would be more appropriate for that sort of plane, and allows a bigger prop:

http://www.hobbyking.com/hobbyking/s...idProduct=9664

- the recommendation there is for 2s (I've no idea if it's right). A 4025 would be fine with the 4200Kv one on 1s, and you might be able to go a bit bigger to get more thrust - maybe 5x3.

You don't get the same benefits from going from a 1s coreless brushed (geared) setup to a 1s brushless direct drive setup that you'd expect. It's not the same as upgrading a plane that has a geared brushed motor and runs on a 2s or 3s lipo, unfortunately. The efficiency of direct drive brushless motors at such low voltages isn't that great, and coreless motors seem pretty good - they just don't live as long. Modfly had some success with a small high Kv brushless motor and a gearbox.

Unfortunately, using a high Kv brushless direct drive isn't good for efficiency and thrust, only speed.
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Old Nov 08, 2011, 04:14 PM
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Bummer
But thanks Andy2No, I guess i'll just make another order to HK! Luckily they are in stock now
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Old Nov 08, 2011, 04:19 PM
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You're welcome, Nooflyer. The Extra looks good. I hope you get it working the way you want it to.
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Old Nov 08, 2011, 04:21 PM
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Quote:
Originally Posted by Nooflyer View Post
Bummer
But thanks Andy2No, I guess i'll just make another order to HK! Luckily they are in stock now
A friend is running one of these on a single cell with a GWS 5030 prop with good results.
http://www.hobbyking.com/hobbyking/s...idproduct=9662

I have one on the way myself.
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Old Nov 08, 2011, 04:28 PM
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way better on 2S


Quote:
Originally Posted by Tim Wolff View Post
A friend is running one of these on a single cell with a GWS 5030 prop with good results.
http://www.hobbyking.com/hobbyking/s...idproduct=9662

I have one on the way myself.
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Old Nov 08, 2011, 04:37 PM
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Will order one of these motors from Hk in the next day.
Until then I'm just going to put the brushed 4site motor in and see how she flies!
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