| |
HK Spitfire |
HK Spitfire |
| Motor |
Turnigy TR 35-42B |
Turnigy TR 35-42B |
| Motor Constant (rpm/V) |
1250 |
1250 |
| No Load Current (A) |
2.3 |
2.3 |
| Armature Resistance (Ohms) |
0.036 |
0.036 |
| |
|
|
| Battery |
Hyperion HP-LVX2000 |
A123 ANR26650 M1 |
| Series Cell Count |
3 |
4 |
| Parallel Cell Count |
2 |
1 |
| Cell Capacity (mAh) |
2000 |
2300 |
| Pack Capacity (mAh) |
4000 |
2300 |
| Cell Voltage (V) |
3.7 |
3.3 |
| Pack Voltage (V) |
11.1 |
13.2 |
| Cell Resistance (Ohms) |
0.0084 |
0.016 |
| Pack Resistance (Ohms) |
0.0126 |
0.064 |
| |
|
|
| Speed Control (ESC) |
Schulze future 45be |
Schulze future 45be |
| Resistance (Ohms) |
0.0022 |
0.0022 |
| Maximum Current (A) |
45 |
45 |
| Number of ESCs |
1 |
1 |
| |
|
|
| Drive System |
10x6 |
10x6 |
| Gear Ratio |
1.00:1 |
1.00:1 |
| Propeller (in x in) |
10x6 |
10x6 |
| Series Motors |
1 |
1 |
| Parallel Motors |
1 |
1 |
| Number of Propellers |
1 |
1 |
| Blades per Propeller |
2 |
2 |
| |
|
|
| Airframe |
HK Spitfire |
HK Spitfire |
| Wing Span (cm) |
123.5 |
123.5 |
| Wing Area (dm²) |
25.8 |
25.8 |
| Total Weight (g) |
1361 |
1363 |
| |
|
|
| Static Predictions |
|
|
| Current (A) |
35.3 |
36.0 |
| Motor Voltage (V) |
10.6 |
10.8 |
| Input Power (W) |
373.1 |
389.7 |
| Input Power Loading (W/kg) |
273.8 |
285.7 |
| Power Loss (W) |
93.5 |
100.3 |
| Motor/Gearbox Output (W) |
279.5 |
289.4 |
| Output Power Loading (W/kg) |
205.1 |
212.2 |
| Motor/Gearbox Efficiency (%) |
74.9 |
74.3 |
| Shaft Efficiency (%) |
71.4 |
60.8 |
| Motor RPM |
10599 |
10722 |
| Propeller RPM |
10599 |
10722 |
| Static Thrust (g) |
1338 |
1369 |
| Pitch Speed (m/s) |
26.9 |
27.2 |
| Run Time (min:sec) |
6:48 |
3:50 |
| |
|
|
| Flight Predictions |
|
|
| Stall Speed (m/s) |
8.9 |
8.9 |
| Optimal Flight Speed (m/s) |
12.3 |
12.3 |
| Throttle for Optimal (%) |
50 |
45 |
| Duration at Optimal (m:s) |
65:33 |
41:35 |
| Motor Temp at Optimal (°C) |
43 |
43 |
| Hands-off Speed (m/s) |
21.2 |
21.2 |
| Throttle for Hands-off (%) |
83 |
74 |
| Duration Hands-off (m:s) |
22:57 |
15:25 |
| Motor Temp Hands-off (°C) |
59 |
59 |
| Best Rate of Climb (m/s) |
8.34 |
8.67 |
| Rate of Sink (m/s) |
-1.12 |
-1.13 |