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Author Topic: Hacker A20-12 equals ?  (Read 1128 times)

Offline Vincent Corwell

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Hacker A20-12 equals ?
« on: August 14, 2012, 02:05:01 PM »
What is the E Power equivalent of a Hacker A20-12XL please ?

Vincent
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Offline William DeMauro

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Re: Hacker A20-12 equals ?
« Reply #1 on: August 14, 2012, 08:33:42 PM »
From what I can figure it is approximately equivalent to an e flight power 10. It will probably work very well in any plane that is close in size to a Flight Streak.
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Offline Andrew Borgogna

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Re: Hacker A20-12 equals ?
« Reply #2 on: August 14, 2012, 11:34:24 PM »
OK here are the specs for the HackerA20-12XL

•Peak Watts: 300
•kV(RPM/V):1000
•Diameter: 1.10 in
•Length: 1.57in
•Weight:2.95 oz
•Shaft Diameter: 3.17mm
•Shaft Diameter W/ GB mm
•Idle Current: 1.00
•Operating Current: 20A
•Peak Current:35A
•Resistance: 0.0750ohms
•Poles: 14
•Orientation: Out


First I don't like peak Watt specs, they are usually only good for 15 seconds.  Beware of peak numbers they can get you into trouble.  I take peak and multiply it by 80% (.80).  So 300 X .80=240 watts.  Based on that and my rule of thumb 150 watts per pound of plane it should easily fly a 25 ounce plane.  That maybe a little light but I wouldn't plan to over two pounds. 

Given a Kv of 1000 it should fly well on a 3 cell battery at around 9000 RPM for five minutes on a 2000mha 3s battery based on the prop you use.   By comparison a Hacker A30-12L has the same Kv of 1000 but has an average power of 740 watts. 

Your question "what is it equal to" is hard to answer because you don't provide what it is you are comparing it to.  Gas engine? Another electric motor?  As far as quality of Hacker motors, I believe them to be one of the best.  I have several and like them all.

Disclaimer: these are estimates results may very. y1
Andy
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Andrew B. Borgogna

Offline Dennis Adamisin

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Re: Hacker A20-12 equals ?
« Reply #3 on: August 15, 2012, 06:33:50 AM »
Quote from: Andrew Borgogna on August 14, 2012, 11:34:24 PM
OK here are the specs for the HackerA20-12XL

•Peak Watts: 300
•kV(RPM/V):1000
•Diameter: 1.10 in
•Length: 1.57in
•Weight:2.95 oz
•Shaft Diameter: 3.17mm
•Shaft Diameter W/ GB mm
•Idle Current: 1.00
•Operating Current: 20A
•Peak Current:35A
•Resistance: 0.0750ohms
•Poles: 14
•Orientation: Out


First I don't like peak Watt specs, they are usually only good for 15 seconds.  Beware of peak numbers they can get you into trouble.  I take peak and multiply it by 80% (.80).  So 300 X .80=240 watts.  Based on that and my rule of thumb 150 watts per pound of plane it should easily fly a 25 ounce plane.  That maybe a little light but I wouldn't plan to over two pounds. 

Given a Kv of 1000 it should fly well on a 3 cell battery at around 9000 RPM for five minutes on a 2000mha 3s battery based on the prop you use.   By comparison a Hacker A30-12L has the same Kv of 1000 but has an average power of 740 watts. 

Your question "what is it equal to" is hard to answer because you don't provide what it is you are comparing it to.  Gas engine? Another electric motor?  As far as quality of Hacker motors, I believe them to be one of the best.  I have several and like them all.

Disclaimer: these are estimates results may very. y1
Andy

Andy:
GOOD STUFF!  Back to the dimensions for a moment.  In the desgination "A20" is the "20" the diameter of the core in mm?  What is the length of the magnets?  WIth that info it should be possible to call it a 20xx per typical motor size specs and make it an easy comparison to other motors.
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Offline Andrew Borgogna

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Re: Hacker A20-12 equals ?
« Reply #4 on: August 15, 2012, 05:26:56 PM »
Denny
I just went out and measured the bell diameter of an A20 and A30 motors.  The outer bell dimension of the A20 was 27mm and the outer bell dimension of the A30 was 37mm.  So my guess is the Axx number is probably the dimensions of the stator or the internal dimension of the magnets.  I also measured the length on the A20 and A30 and they were nowhere near 20mm or 30mm.  I do remember that what you suggested was suppose to be the meaning of the numbers but I also remember reading that just about nobody was adhering to the standard.
Andy
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Offline Vincent Corwell

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Re: Hacker A20-12 equals ?
« Reply #5 on: August 16, 2012, 01:09:55 AM »
Thanks for spec info Andy

I ordered this one from Hobby King :

D2217-8-1100/18969 Turnigy D2836/8 1100KV Brushless Outrunner Motor

is as near as I can find, want a cheap power train for a test on a 15 size Bear Cub

Vincent
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Offline Andrew Borgogna

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Re: Hacker A20-12 equals ?
« Reply #6 on: August 16, 2012, 05:26:19 PM »
Vince you are welcome.  If you need any help please get in touch with me via email and I will do whatever I can to help.
Andy
abborgogna@hotmail.com
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