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Nov 06, 2011, 02:45 PM
Wanton construction
Pouncer's Avatar
Quote:
Originally Posted by Nooflyer
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?

https://www.rcgroups.com/forums/show....php?t=1534571
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Nov 06, 2011, 03:05 PM
Micro Boat Forum Founder
boredom.is.me's Avatar
Quote:
Originally Posted by Nooflyer
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
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?

https://www.rcgroups.com/forums/show....php?t=1534571
http://www.hobbyking.com/hobbyking/s..._ESC_3_5A.html
Nov 06, 2011, 04:40 PM
Nothing flies like a Pitts
Meshuggah's Avatar
Quote:
Originally Posted by seitz2c
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
Nov 06, 2011, 06:34 PM
Registered User
Nooflyer's Avatar
boredom.is.me,
thanks i'll try that as i feel the 3020 prop would be speedy!
Nov 08, 2011, 01:53 PM
Registered User
Nooflyer's Avatar
Recieved my 3.5a esc but i'm still having issues. Are these esc programmable, if so is there a manual somewhere? thanks
Nov 08, 2011, 02:01 PM
Vi ne donu ĝin
coriolan's Avatar
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"
Nov 08, 2011, 02:09 PM
Registered User
Nooflyer's Avatar
thank you, coriolan
Nov 08, 2011, 02:10 PM
NaN
Andy2No's Avatar
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.
Nov 08, 2011, 02:37 PM
Registered User
Nooflyer's Avatar
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.
Nov 08, 2011, 03:05 PM
NaN
Andy2No's Avatar
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.
Nov 08, 2011, 03:14 PM
Registered User
Nooflyer's Avatar
Bummer
But thanks Andy2No, I guess i'll just make another order to HK! Luckily they are in stock now
Nov 08, 2011, 03:19 PM
NaN
Andy2No's Avatar
You're welcome, Nooflyer. The Extra looks good. I hope you get it working the way you want it to.
Nov 08, 2011, 03:21 PM
Gravity is a harsh mistress.
Tim Wolff's Avatar
Quote:
Originally Posted by Nooflyer
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.
Nov 08, 2011, 03:28 PM
QuAd FaNaTiC
Razors edge 29's Avatar
way better on 2S


Quote:
Originally Posted by Tim Wolff
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.
Nov 08, 2011, 03:37 PM
Registered User
Nooflyer's Avatar
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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