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Old 09-17-2003, 09:49 PM
  #1  
electicman
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Default .46 to electric

I would like to find out what I need to change a .46 Goldberg Anniversary Cub to a basic electric four channel.
Old 09-18-2003, 07:22 AM
  #2  
Matt Kirsch
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Default RE: .46 to electric

With all that's out there, the options are endless... For sure, your best overall value will be a brushless motor. Pushing the kind of Watts you need through any brushed motor besides an Astro Cobalt will be very inefficient, and more expensive in the long run due to constant motor replacement. For the cost of an Astro Cobalt, you may as well go brushless, IMHO.

A plane like this will probably come out at 6-7 pounds. I feel that a plane, any plane, needs at least 75 Watts per pound to fly like its overpowered glow counterpart. The point here is to impress the glow fliers, not "fly scale," right? You need a system capable of about 500 Watts, turning a large diameter, relatively high-pitched prop at a low RPM.

Between information I've gleaned over the years, and calculations I've made, I've concluded that most .40-.46 sized conversions will fly well on 14-16 Sub C NiCd or NiMH cells. I'm flying a Tower Trainer .40 on a car motor and 10 cells, but that's an exception to the rule. There are also conversions that are running on up to 20 cells, but they're a bit on the porky side weight-wise.

Use search and look up Greg Covey's Bohemia Models Monocoupe. That plane has a power system that should work well for your plane. I believe it's an AXi 4120/14 on 14 cells with an APC 13x8 Thin Electric prop. You could probably back off to a 12x8 prop and still have plenty of power, as his Monocoupe weighs 10 pounds!

Here's his review:
http://www.rcuniverse.com/magazine/a...&CFTOKEN=35481
Old 09-18-2003, 07:37 PM
  #3  
BruceDana
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Default RE: .46 to electric

Here is what MotorCalc says:

MotoWizard Results - Electric Cub

Desired Full-throttle Performance: Sport
Minimum Partial-throttle Flying Time: 9 minutes

Number of Motors: 1
Wing Span: 76 in
Wing Area: 744 sq.in
Empty Weight: 80 oz
Airfoil: Thick Semi Symmetrical

Elevation: 300 ft
Sea-level Pressure: 30.00 inHg
Air Temperature: 60°F

Drive System Types: Direct Drive or Geared
Motor Types: Brushless Only
Manufacturer: Any Manufacturer
Maximum Number of Cells: 8 NiCd/NiMH or 3 LiPoly
Cell Types: NiCd or NiMH Only

Motor Battery Gear Prop Rating

Hacker B50 11L 8x2400SCR 5:1 17x15 1.000
Hacker B50 10XL 8x2400SCR 3.5:1 17x15 0.997
Hacker B50 12L 8x2400SCR 4.5:1 17x15 0.993
Hacker B50 11XL 8x2400SCR 3:1 16x14 0.991
Kontronik Fun 600-18 (12V) 8x2400SCR 4:1 17x15 0.990
Plettenberg HP 220/40/A2 S P4 Car E-Maxx 8x2400SCR 4.5:1 16x14 0.988
Kontronik Fun 480-33 (12V) 8x2400SCR 6:1 15x12 0.986
Hacker B40 11L 8x2400SCR 6:1 17x15 0.985
Aveox 27/39/1.5 8x2400SCR 4.5:1 17x15 0.984
Hacker B40 9L 8x2400SCR 6:1 15x12 0.983
Hacker B50 12XL 8x2400SCR 3:1 17x16 0.982
Hacker B50 14S 8x2400SCR 6:1 17x16 0.982
Hacker B50 14L 8x2400SCR 4:1 17x16 0.982
Hacker B40 10L 8x2400SCR 5:1 15x11 0.981
Hacker B50 13L 8x2400SCR 4:1 17x15 0.980
Kontronik Fun 480-28 (12V) 8x2400SCR 6:1 17x15 0.980
Hacker B50 15S 8x2400SCR 5:1 16x14 0.979
Hacker B50 13S 8x2400SCR 6:1 17x15 0.977
Kontronik Tango 45-10 (20V) 8x2400SCR 2:1 16x13 0.975
Aveox 1015/1.5Y 8x2400SCR 4.5:1 16x13 0.974
Hacker B50 15L 8x2400SCR 3.5:1 17x15 0.974
Hacker B50 9XL 7x2400SCR 3.5:1 16x15 0.973
Hacker B40 10S 8x2400SCR 6:1 13x9 0.973
Kontronik Fun 500-27 (12V) 8x2400SCR 6:1 17x15 0.971
Kontronik BL480-33 (7V) 8x2400SCR 6:1 15x12 0.970
Hacker B50 13XL 8x2400SCR 2.5:1 16x15 0.966
Hacker B40 12L 8x2400SCR 5:1 16x14 0.964
Hacker B50 16S 8x2400SCR 4.5:1 16x14 0.963
Hacker B50 14XL 8x2400SCR 2.5:1 17x16 0.963
Kontronik KBM 42-30 8x2400SCR 5:1 15x11 0.963
Kontronik BL400-40 (7V) 8x2400SCR 6:1 14x10 0.962
Kontronik Fun 400-42 (6V) 8x2400SCR 6:1 14x10 0.961
Aveox 27/26/2 8x2400SCR 5:1 17x15 0.961
Hacker B40 11S 8x2400SCR 6:1 14x11 0.959
Hacker B50 12S 7x2400SCR 6:1 16x15 0.959
Kontronik Fun 500-21 (12V) 8x2400SCR 5:1 17x17 0.959
Hacker B50 16L 8x2400SCR 3:1 16x14 0.958
Hacker B50 17S 8x2400SCR 4.5:1 17x15 0.958
Hacker B40 12S 8x2400SCR 6:1 15x12 0.957
Kontronik BL600-17 (12V) 8x2400SCR 3.5:1 16x15 0.957
Aveox 27/39/2 8x2400SCR 3.5:1 17x16 0.956
Hacker B40 13S 8x2400SCR 6:1 16x13 0.956
Kontronik BL400-36 (7V) 8x2400SCR 6:1 15x12 0.956
Hacker B40 14S 8x2400SCR 6:1 16x14 0.954
Kontronik Fun 400-36 (12V) 8x2400SCR 6:1 15x12 0.954
Aveox 1010/DF 8x2400SCR 6:1 16x13 0.952
Aveox Marine 12 8x2400SCR 4.5:1 17x16 0.952
Hacker B50 18S 8x2400SCR 4.5:1 17x16 0.952
Plettenberg HP 370/20/A2 S 8x2400SCR 2:1 16x14 0.951
Aveox 27/26/1.5 7x2400SCR 6:1 16x15 0.951
Hacker B40 13L 8x2400SCR 4.5:1 16x14 0.951
Aveox 1010/2Y 8x2400SCR 4.5:1 15x12 0.951
Kontronik KBM 67-11 8x2400SCR 2.5:1 17x16 0.950
MaxCim MaxNEO-13D 8x2400SCR 4.5:1 16x13 0.949
Aveox 1415/2Y 8x2400SCR 2.5:1 16x15 0.948
Kontronik Fun 600-15 (24V) 8x2400SCR 3:1 17x15 0.948
Kontronik Fun 600-15 (12V) 8x2400SCR 3:1 17x15 0.948
Kontronik BL500-20 (12V) 8x2400SCR 4.5:1 17x16 0.946
Aveox 1409/2Y 8x2400SCR 4.5:1 17x16 0.946
Kontronik KBM 42-24 (est) 8x2400SCR 5:1 17x15 0.945
Aveox 1015/2Y 8x2400SCR 3.5:1 17x15 0.945
Hacker B50 15XL 8x2400SCR 2:1 16x14 0.944
Mega AC 22/20/3 8x2400SCR 4.5:1 17x15 0.944
Kontronik Fun 400-42 (12V) 8x2400SCR 6:1 14x10 0.941
Hacker B50 17L 8x2400SCR 3:1 17x16 0.939
Hacker B50 16XL 8x2400SCR 2:1 16x15 0.939
Kontronik BL400-36 (12V) 8x2400SCR 6:1 15x12 0.938
Mega AC 22/45/2 8x2400SCR 3:1 17x16 0.937
MaxCim MaxN32-13D 8x2400SCR 5:1 16x14 0.935
Mega AC 22/30/3 8x2400SCR 3:1 17x17 0.933
Hacker B40 15S 8x2400SCR 6:1 17x16 0.933
Hacker B50 19S 8x2400SCR 4:1 17x16 0.933
Hacker B50 18L 8x2400SCR 3:1 17x17 0.932
Hacker B40 14L 8x2400SCR 4.5:1 17x16 0.928
Hacker B50 20S 8x2400SCR 4:1 17x17 0.927
MaxCim Max15-13D 8x2400SCR 5:1 16x14 0.926
Flyware LRK 350/10-ARF-10.5W 10-pole 8x2400SCR 5:1 16x14 0.924
Mega ACn 16-15-3 8x2400SCR 6:1 16x15 0.924
Jeti Phasor 15-3 8x2400SCR 4.5:1 16x14 0.924
Plettenberg HP 220/20/A3 P4 8x2400SCR 6:1 17x17 0.920
Hacker B50 19L 8x2400SCR 2.5:1 16x15 0.917
Plettenberg HP 300/20/A3 S 8x2400SCR 2:1 16x14 0.911
Hacker B50 20L 8x2400SCR 2.5:1 17x16 0.908
Kontronik BL400-29 (7V) 8x2400SCR 6:1 17x16 0.908
Hacker B50 21S 8x2400SCR 3.5:1 17x16 0.907
Aveox 1406/3Y 8x2400SCR 4.5:1 17x17 0.906
Graupner Ultra Brushless 220/20-3 #6381 8x2400SCR 3:1 16x14 0.904
Hacker B40 15L 8x2400SCR 4:1 17x16 0.901
Hacker B40 16S 8x2400SCR 4.5:1 15x13 0.901
Mega AC 22/10/4 8x2400SCR 6:1 16x15 0.896
Kontronik Fun 400-28 (12V) 8x2400SCR 6:1 17x17 0.895
Hacker B50 22S 8x2400SCR 3.5:1 17x17 0.894
Kontronik BL400-29 (12V) 8x2400SCR 6:1 17x16 0.891
Hacker B40 17S 8x2400SCR 5:1 17x16 0.886

Generated by MotoCalc 7.03, 9/18/2003 8:32 PM.
Old 09-19-2003, 07:27 AM
  #4  
Matt Kirsch
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Default RE: .46 to electric

No offense, but you listed about 100 welders. On 8 cells, the current is going to be so high that flight times will be unreasonably short, and everything will be HOT.

Why did you limit cell count to 8? 8 cells is more like a .15 glow.
Old 09-19-2003, 01:58 PM
  #5  
BruceDana
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Default RE: .46 to electric

No particular reason...Just plugging numbers into the BLACK BOX to see what it spit out. Note the INPUT = "Desired Full-throttle Performance: Sport
Minimum Partial-throttle Flying Time: 9 minutes "
Old 09-19-2003, 02:04 PM
  #6  
BruceDana
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Default RE: .46 to electric

Another try???

MotoWizard Results - Eectric Goldberg Cub

Desired Full-throttle Performance: Trainer
Minimum Partial-throttle Flying Time: 13 minutes

Number of Motors: 1
Wing Span: 76 in
Wing Area: 744 sq.in
Empty Weight: 88 oz
Airfoil: Thick Semi Symmetrical

Elevation: 300 ft
Sea-level Pressure: 29.00 inHg
Air Temperature: 60°F

Drive System Types: Direct Drive Only
Motor Types: Brushless Only
Manufacturer: Any Manufacturer
Maximum Number of Cells: 14 NiCd/NiMH or 5 LiPoly
Cell Types: NiCd or NiMH Only

Motor Battery Gear Prop Rating

Aveox V12 9x3000SCR 14x12 1.000
Kontronik Tango 45-08 (20V) 9x3000SCR 12x8 0.998
Kontronik Tango 45-10 (20V) 9x3000SCR 10x6 0.994
Mega AC 22/45/3 9x3000SCR 12x9 0.982
Kontronik Tango 45-08 (20V) 8x3000SCR 12x9 0.975
Hacker B50 16XL 8x3000SCR 11x7 0.972
Plettenberg HP 300/20/A3 S 10x3000SCR 10x5.5 0.969
Hacker B50 18XL 8x3000SCR 11x8 0.968
Aveox V12 8x3000SCR 15x14 0.967
Kontronik Tango 45-06 (20V) 9x3000SCR 13x11 0.963
Mega AC 22/45/3 8x3000SCR 13x10 0.959
Hacker B50 17XL 8x3000SCR 11x8 0.956
Plettenberg HP 300/20/A3 S 9x3000SCR 10x6 0.956
Kontronik Fun 600-11 (24V) 9x3000SCR 10x5.5 0.955
Kontronik Fun 600-11 (12V) 9x3000SCR 10x5.5 0.955
Plettenberg HP 355/15/B18 P10 Orbt 15/18 11x3000SCR 10x5 0.954
Mega AC 22/30/4 10x3000SCR 10x6 0.953
Hacker B50 19XL 8x3000SCR 12x9 0.951
Kontronik Tango 45-08 (20V) 7x3000SCR 12x10 0.951
Hacker B50 21L 9x3000SCR 10x5.5 0.950
Graupner Ultra Brushless 300/30-2 #6384 9x3000SCR 11x7 0.948
Aveox 27/39/3 11x3000SCR 10x5.5 0.945
Hacker B50 22L 9x3000SCR 10x6 0.940
Kontronik Tango 45-06 (20V) 8x3000SCR 14x12 0.940
Plettenberg HP 355/15/B18 P10 Orbt 15/18 10x3000SCR 10x5.5 0.939
Hacker B50 21XL 8x3000SCR 13x10 0.938
Aveox 1412/3Y Neodym 9x3000SCR 11x7 0.933
Actro 24-4 8x3000SCR 14x13 0.933
Aveox 1015/3Y 11x3000SCR 9x5 0.931
Hacker B50 20XL 8x3000SCR 12x10 0.929
Aveox 27/39/3 10x3000SCR 10x6 0.927
Aveox 1412/4Y Sport 40 9x3000SCR 13x10 0.927
Mega AC 22/30/4 9x3000SCR 11x7 0.924
Plettenberg HP 355/15/B18 P10 Orbt 15/18 9x3000SCR 10x6 0.923
Hacker B50 24L 9x3000SCR 11x7 0.920
Hacker B50 22XL 8x3000SCR 13x11 0.919
Plettenberg HP 370/30/A2 SL 8x3000SCR 14x13 0.919
Hacker B50 25L 9x3000SCR 11x7 0.918
Actro 12-5 10x3000SCR 11x7 0.915
Aveox 1015/3Y 10x3000SCR 10x5.5 0.913
Model Motors AXI AC4120/14 8x3000SCR 13x12 0.911
Hacker B50 23XL 8x3000SCR 13x12 0.908
Plettenberg HP 355/10/B22 P10 Orbt 10/22 11x3000SCR 9x5 0.902
Model Motors AXI AC2820/10 11x3000SCR 9x5 0.899
Aveox 27/39/3 9x3000SCR 11x7 0.897
Hacker B50 26L 9x3000SCR 11x8 0.896
Kontronik Tango 45-05 (20V) 9x3000SCR 15x15 0.896
Aveox 1409/4Y 9x3000SCR 11x7 0.896
Aveox 1015/3Y 9x3000SCR 10x6 0.893
Actro 12-5 9x3000SCR 11x8 0.889
Hacker B50 24XL 8x3000SCR 14x13 0.887
Model Motors AXI AC2820/10 10x3000SCR 10x5.5 0.885
Graupner Ultra Brushless 300/30-3 #6385 9x3000SCR 14x13 0.882
Actro 12-6 10x3000SCR 12x10 0.850
Plettenberg HP 370/20/A3 10x3000SCR 14x14 0.835

Generated by MotoCalc 7.03, 9/19/2003 3:00 PM.
Old 10-16-2003, 10:10 AM
  #7  
Daniel Z
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Default RE: .46 to electric

can I ask for a cheap 3D configuration for a 5 Lb plane?
thanks
Old 10-18-2003, 08:27 AM
  #8  
Henke Torphammar
 
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Default RE: .46 to electric

Hi

Motocalc is no good if you don´t know what to put in...

Try a Hacker B50 11S 6,7:1 on 12x2600 Sanyo swinging...say a 16x10 or 17x12.

this setup would give you lot´s of power, and nice cruiceing at very low throttle.

Daniel,

For a 5lb plane you would need about 10lb thrust. even here the B5011S 6,7:1 would be a very good setup. useing 12cells and a 18x8/10 prop. or go for the classic Diablotin setup, B50 13S 6,7:1 18x10 and 14cells, 2600Sanyo HR ot GP3300.

hope this helps =)

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