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Diablotin 2000 3D electric conversion

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Old 12-31-2004, 06:20 AM
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gtrick90
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Default Diablotin 2000 3D electric conversion

Hi all.

I have a Diablotin 2000 3D ARF.
It's a wonderful 3D plane that I want to convert to electric power.
Which motor/batteries combination it's better for this kind of plane?
Here the plane's data:
Wing Span 185 cm
Length 200 cm
Wing area 94+18 dmq
Weight 3700-4500 g
Sction Fun Fly
Engine 15-25 cc
Radio/RC 5-7 CH
6-7 standard servos 5Kg

Any suggestion?
AXI, Haker,PJS?

Thanks to all
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Old 12-31-2004, 04:04 PM
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Default RE: Diablotin 2000 3D electric conversion

http://www.espritmodel.com/glow_diablo_2000.html

This site suggests a Hacker C50 13XL 6.7:1, 20x13 with TP8000 9S4P or 10S4P
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Old 01-02-2005, 06:28 AM
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Default RE: Diablotin 2000 3D electric conversion

ORIGINAL: Wazmo

http://www.espritmodel.com/glow_diablo_2000.html

This site suggests a Hacker C50 13XL 6.7:1, 20x13 with TP8000 9S4P or 10S4P

Powerful combo.

Thanks for you info.

But I want to try an outrunner like AXI or PJS also (I think they are much cheapier!).

Any suggestion?

Luca
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Old 01-02-2005, 01:01 PM
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Default RE: Diablotin 2000 3D electric conversion

Using MotoCalc, I wasn't able to come up with any suitable power system using an AXI or PJS. If you want to use a direct-drive outrunner, you might take a look at the manufacturer mentioned in the giant scale Piper Super Cub thread. MotoCalc doesn't have any numbers for those motors.

The wizard suggested the following (but that battery's going to be very expensive).

Motor: Kontronik Tango 45-06 (20V); 640rpm/V; 0.6A no-load; 0.055 Ohms.
Battery: Thunder Power TP1950; 12 series x 4 parallel cells; 1950mAh @ 3.7V; 0.015 Ohms/cell.
Speed Control: Castle Creations Phoenix 35; 0.0045 Ohms; High rate.
Drive System: Generic 21x13in Prop w/6:1 Gearbox; 21x13 (Pconst=1.25; Tconst=0.956) geared 6:1 (Eff=95%).
Airframe: Diablotin 2000 3D ARF; 67.4dm²; 4728g; 70.1g/dm²; Cd=0.048; Cl=0.21; Clopt=0.48; Clmax=0.89.
Stats: 236 W/kg in; 211 W/kg out; 12m/s stall; 16.3m/s opt @ 79% (100:43, 33°C); 25m/s level; 8.24m/s @ 30.3°; -2.33m/s @ -8.2°.
Conditions: 304.8m above Sea Level, 101.3kPa, 24°C

Batt Amps = 25.9
Motor Amps = 25.9
Motor Volts = 43.1
Input (W) = 1115.7
Loss (W) = 118.8
MGbOut (W) = 997.0
MotGb Ef(%) = 89.4
Shaft Ef(%) = 86.8
Motor RPM = 26572
Prop RPM = 4429
Thrust (g) = 5983
PSpd (m/s) = 24.4
Time (m:s) = 18:05
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Old 01-02-2005, 01:46 PM
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Default RE: Diablotin 2000 3D electric conversion

Thanks Wazmo.

Here the outrunner data:
AXI 5330/18
Voltage range max.32 cells
max.10s Li-Poly
RPM per Volt 249 RPM/V
Max. Efficiency 90%
Max. Efficiency Current 25-60 A (>85%)
Max. loading 75 A / 30 s
No load Current/30V 2 A
Internal resistance 32 mohm
Dimensions 63x64 mm
Shaft Diameter 8 mm
Weight 652 g
Recomended model weight 5000 - 10000 g
Propeller range 10s Li-Poly cells prop 19"x12" APC-E
10s Li-Poly cells prop 20"x13" APC-E (F3A set-up)


PJS 8000 3D

143mm diameter
135mm long (from front of spinner to firewall mounting surface).
Weighs 782gr
Use with 30 Nicad or NiMh cells or a 10S Lithium battery
Max load is 49.1 amps.
Recommended prop size is 22 x 12.
Motor specs: 244 RPM/V, resistance of 55 mOhm, and I zero of 7.1A.


What do you think?

Luca
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Old 01-02-2005, 02:59 PM
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Default RE: Diablotin 2000 3D electric conversion

Sounds feasible. Real numbers will vary from these predictions, more or less depending on accuracy of assumptions.

Motor: Model Motors AXI AC5330/18; 249rpm/V; 2A no-load; 0.032 Ohms.
Battery: Thunder Power TP1950; 10 series x 4 parallel cells; 1950mAh @ 3.7V; 0.015 Ohms/cell.
Speed Control: Castle Creations Phoenix 80; 0.001 Ohms; High rate.
Drive System: Generic 20x13in Prop; 20x13 (Pconst=1.25; Tconst=0.956) direct drive.
Airframe: Diablotin 2000 3D ARF; 67.4dm²; 4832g; 71.7g/dm²; Cd=0.048; Cl=0.21; Clopt=0.48; Clmax=0.89.
Stats: 500 W/kg in; 308 W/kg out; 12.1m/s stall; 16.5m/s opt @ 42% (85:27, 40°C); 25.2m/s level @ 63% (34:33, 51°C); 19.04m/s @ 90°; -2.35m/s @ -8.2°.
Conditions: 304.8m above Sea Level, 101.3kPa, 24°C

Batt Amps = 70.6
Motor Amps = 70.6
Motor Volts = 34.3
Input (W) = 2419.6
Loss (W) = 932.2
MGbOut (W) = 1487.4
MotGb Ef(%) = 61.5
Shaft Ef(%) = 57.0
Prop RPM = 5401
Thrust (g) = 7398
PSpd (m/s) = 29.7
Time (m:s) = 6:38


Not sure about the PJS numbers. According to MotoCalc, the specified prop will draw too much current. This is what MotoCalc says (I had to try different prop sizes to limit current):

Motor: PJS 8000 3D; 244rpm/V; 7.1A no-load; 0.055 Ohms.
Battery: Thunder Power TP1950; 10 series x 4 parallel cells; 1950mAh @ 3.7V; 0.015 Ohms/cell.
Speed Control: Castle Creations Phoenix 60; 0.0012 Ohms; High rate.
Drive System: Generic 16x9 Prop; 16x9 (Pconst=1.25; Tconst=0.956) direct drive.
Airframe: Diablotin 2000 3D ARF; 67.4dm²; 4206g; 62.4g/dm²; Cd=0.048; Cl=0.21; Clopt=0.48; Clmax=0.89.
Filter: 49A max; 60A max (ESC).
Stats: 401 W/kg in; 316 W/kg out; 11.3m/s stall; 15.4m/s opt @ 85% (17:42, 870°C); 23.5m/s level @ 96% (25:23, 1012°C); 13.5m/s @ 61.1°; -2.2m/s @ -8.2°.
Conditions: 304.8m above Sea Level, 101.3kPa, 24°C

Batt Amps = 48.1
Motor Amps = 48.1
Motor Volts = 35.1
Input (W) = 1689.2
Loss (W) = 359.5
MGbOut (W) = 1329.6
MotGb Ef(%) = 78.7
Shaft Ef(%) = 74.8
Prop RPM = 7919
Thrust (g) = 5909
PSpd (m/s) = 30.2
Time (m:s) = 9:44
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