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Old Jan 19, 2013, 04:33 AM
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South Africa, GP, Pretoria
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Originally Posted by Skylar View Post
Sorry Louis, my mistake. I downloaded v3.35 and not v3.55.
Thanks
Christo
Louis
It's not my best day. I meant v3.53, sorry.
BTW, I can't find any info about this motor, except in Scorpion_Calc. Do you know if it's commercially available anywhere?
Christo
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Old Jan 19, 2013, 04:37 AM
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Fourdan's Avatar
Antony (France)
Joined Sep 2003
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Christo
HK2520 is a new motor
I will mini review today on RCG
Keep an eye (in one/two hours)
Louis
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Old Jan 19, 2013, 05:07 AM
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Skylar's Avatar
South Africa, GP, Pretoria
Joined Jul 2003
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That's great! I'm definitely interested.
Thanks
Christo
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Old Feb 07, 2013, 12:06 PM
rip
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United States, FL, Niceville
Joined Jan 2013
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Wonderful Program !
Learning a lot from it.
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Old Mar 02, 2013, 04:08 AM
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Antony (France)
Joined Sep 2003
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New version Scorpion Calc v3.56

Hi
new Scorpion Calc : version v3.56
Slight modification of the computing Kernel and display
Now in the "Performances" frame :
Efficiency is at ESC input level (including all estimated ESC losses)
Power In at the same level
Louis
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Old Mar 31, 2013, 07:02 PM
It's the Crack
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United States, CA, Ventura
Joined Feb 2013
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Originally Posted by Fourdan View Post
Hi
new Scorpion Calc : version v3.56
Slight modification of the computing Kernel and display
Now in the "Performances" frame :
Efficiency is at ESC input level (including all estimated ESC losses)
Power In at the same level
Louis
Hey Fourdan,

I was wondering if you could add support for the Scopion S2503-1960kv and the 11A Scorpion ESC (the precise one I'm looking at firing up tomorrow) anytime soon.. planning on running an 8x4 or 8x3.8SF on it at the moment.

Also would like to see the S1805-2250kv.

Peter
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Old Mar 31, 2013, 07:12 PM
It's the Crack
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United States, CA, Ventura
Joined Feb 2013
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Originally Posted by peterdawolf View Post
Hey Fourdan,

I was wondering if you could add support for the Scopion S2503-1960kv and the 11A Scorpion ESC (the precise one I'm looking at firing up tomorrow) anytime soon.. planning on running an 8x4 or 8x3.8SF on it at the moment.

Also would like to see the S1805-2250kv.

Peter
One last thing wanted to mention, the 2503-1960kv is listed as 20grams, it's actually 21.60g (measured) NIB.

Peter
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Old Apr 01, 2013, 05:12 AM
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Antony (France)
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Quote:
Originally Posted by peterdawolf View Post
Hey Fourdan,

I was wondering if you could add support for the Scopion S2503-1960kv and the 11A Scorpion ESC (the precise one I'm looking at firing up tomorrow) anytime soon.. planning on running an 8x4 or 8x3.8SF on it at the moment.

Also would like to see the S1805-2250kv.

Peter
Hi
I have to ask Scorpion's boss for one S2503-1960 sample to test and embed in SC.
Regarding SC kernel it was not developped (by myself , in VB6) for a library of ESC.
So the solution is to user-edit the parameters (if you have)
Regards
Louis
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Old Apr 01, 2013, 09:20 AM
rip
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United States, FL, Niceville
Joined Jan 2013
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Sii 3026-710

Louis,

I'm experiencing some performance issues with a new SII 3026-710 motor.

SC calc predicts that using a 4S LIPO and an APC 12x8E prop the motor should be pulling 50.5 Amps and the prop should be rotating at 9383 RPMs.

When I tested the motor I got:

Test Results: 15.10 V, 36.3 A, 8970 RPMs.

Test Conditions: APC 12x8E prop, 25ft ASL, 67 F. The Battery was reading 16.76 V with no load.

This is well below the stated numbers on the Scorption "Performances Charts" in their web site.

I noticed that SC lists 790 as the KV for this motor. This is supposed to be a 710 KV motor. Did the 790 KV value came through tests?

I am trying to get all my facts straight before I request the motor be replaced under warranty.

--Robert
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Old Apr 01, 2013, 12:58 PM
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Antony (France)
Joined Sep 2003
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Quote:
Originally Posted by ripacheco View Post
Louis,

I'm experiencing some performance issues with a new SII 3026-710 motor.

SC calc predicts that using a 4S LIPO and an APC 12x8E prop the motor should be pulling 50.5 Amps and the prop should be rotating at 9383 RPMs.

When I tested the motor I got:

Test Results: 15.10 V, 36.3 A, 8970 RPMs.

Test Conditions: APC 12x8E prop, 25ft ASL, 67 F. The Battery was reading 16.76 V with no load.

This is well below the stated numbers on the Scorption "Performances Charts" in their web site.

I noticed that SC lists 790 as the KV for this motor. This is supposed to be a 710 KV motor. Did the 790 KV value came through tests?

I am trying to get all my facts straight before I request the motor be replaced under warranty.

--Robert
Hi Robert
Yes I have tested one sample SII 3026-710 ref IL0004 (beginning of the serial)
I measured Kv around 781 rpm/V @ 15V

There are two other informations concerning SII 3026-710
http://www.rcgroups.com/forums/showp...postcount=4512
and a paper by Ken Myers (attached .doc). Ken found Kv around 779 rpm/V

It is possible that several batchs of SII 3026-710 could have some spreading about Kv. (magnet strength .. windings ..).
Maybe Lucien could have additional measurements.
Anyway I will transmit that "observation" to Scorpion technicians

Depending of the replies it is easy for me to change 3 major parameters in SC
Rm, Io versus rpm, Kv

Concerning the difference 781 rpm/V against 790 rpm/V .. I don't remember
why I have put 790 rpm/V instead of 780.
Regards
Louis
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Old Apr 09, 2013, 11:41 AM
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Joined Jan 2009
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Quote:
Originally Posted by ripacheco View Post
Louis,

I'm experiencing some performance issues with a new SII 3026-710 motor.

SC calc predicts that using a 4S LIPO and an APC 12x8E prop the motor should be pulling 50.5 Amps and the prop should be rotating at 9383 RPMs.

When I tested the motor I got:

Test Results: 15.10 V, 36.3 A, 8970 RPMs.

Test Conditions: APC 12x8E prop, 25ft ASL, 67 F. The Battery was reading 16.76 V with no load.

This is well below the stated numbers on the Scorption "Performances Charts" in their web site.

I noticed that SC lists 790 as the KV for this motor. This is supposed to be a 710 KV motor. Did the 790 KV value came through tests?

I am trying to get all my facts straight before I request the motor be replaced under warranty.

--Robert
I experienced something somewhat similar to this issue. My current(I) readings on a scorpion motor (with a scorpion camander ESC) where drastically lower than predicted. What I found was that after doing the initial ESC throttle calibration, I was testing how to program the LVC. I tried programming the ESC to return to factory settings, which unknowingly cleared my throttle calibration. When I went to fly the plane, I was surprised that I didn't get the performance I expected. I recalibrated my throttle on the ESC, and all was good.

Kevin
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Old Apr 09, 2013, 06:45 PM
fast,,,, faster
FASTBEN's Avatar
KELLER TEXAS
Joined Feb 2002
3,404 Posts
hi all can some one help me with this?please

http://www.rcgroups.com/forums/showthread.php?t=1869286
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Old Apr 20, 2013, 07:04 PM
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Joined Jun 2005
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Hi Louis
Is it possible to contact you offline.
I just have a few questions about motor torque and power formulas to use, please
Thanks
Tommie Prinsloo
Pretoria
South Africa
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Old Apr 21, 2013, 02:44 AM
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Fourdan's Avatar
Antony (France)
Joined Sep 2003
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Quote:
Originally Posted by Tommie Prinsloo View Post
Hi Louis
Is it possible to contact you offline.
I just have a few questions about motor torque and power formulas to use, please
Thanks
Tommie Prinsloo
Pretoria
South Africa
Hi Tommie
No problem to contact me by email
Have a look in Scorpion Calc "about" "?"/menu
Louis
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Old Apr 24, 2013, 03:22 PM
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Fourdan's Avatar
Antony (France)
Joined Sep 2003
2,869 Posts
Hi
Scorpion Calc is updated v 3.57
Added S1805-2250 and S2503-1960
see post #1
Louis
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