| |
Sig LT-25 Twin |
Sig LT-25 Twin |
| Motor |
Kyosho Atomic Force 17T |
Kyosho Atomic Force 17T |
| Motor Constant (rpm/V) |
3531 |
3531 |
| No Load Current (A) |
2.94 |
2.94 |
| Armature Resistance (Ohms) |
0.035 |
0.035 |
| |
|
|
| Battery |
Sanyo CP-2400SCR |
Sanyo CP-1700SCR |
| Series Cell Count |
14 |
14 |
| Parallel Cell Count |
1 |
1 |
| Cell Capacity (mAh) |
2300 |
1700 |
| Pack Capacity (mAh) |
2300 |
1700 |
| Cell Voltage (V) |
1.2 |
1.2 |
| Pack Voltage (V) |
16.8 |
16.8 |
| Cell Resistance (Ohms) |
0.0053 |
0.0055 |
| Pack Resistance (Ohms) |
0.0742 |
0.077 |
| |
|
|
| Speed Control (ESC) |
Castle Creations Griffin 50 |
Castle Creations Griffin 50 |
| Resistance (Ohms) |
0.0011 |
0.0011 |
| Maximum Current (A) |
50 |
50 |
| Number of ESCs |
1 |
1 |
| |
|
|
| Drive System |
Master Airscrew 3.0:1 Gearbox w/APC Prop |
Master Airscrew 3.0:1 Gearbox w/APC Prop |
| Gear Ratio |
3.00:1 |
3.00:1 |
| Propeller (in x in) |
10x7 |
9x8 |
| Series Motors |
2 |
2 |
| Parallel Motors |
1 |
1 |
| Number of Propellers |
2 |
2 |
| Blades per Propeller |
2 |
2 |
| |
|
|
| Airframe |
Sig LT-25 |
Sig LT-25 |
| Wing Span (in) |
63 |
63 |
| Wing Area (sq.in) |
724 |
724 |
| Total Weight (oz) |
105.0 |
99.2 |
| |
|
|
| Static Predictions |
|
|
| Current (A) |
24.0 |
20.3 |
| Motor Voltage (V) |
15.0 |
15.2 |
| Input Power (W) |
360.3 |
308.4 |
| Input Power Loading (W/lb) |
54.9 |
49.8 |
| Power Loss (W) |
108.8 |
92.2 |
| Motor/Gearbox Output (W) |
251.5 |
216.3 |
| Output Power Loading (W/lb) |
38.3 |
34.9 |
| Motor/Gearbox Efficiency (%) |
69.8 |
70.1 |
| Shaft Efficiency (%) |
62.3 |
63.5 |
| Motor RPM |
22880 |
23947 |
| Propeller RPM |
7627 |
7982 |
| Static Thrust (oz) |
48.2 |
34.9 |
| Pitch Speed (mph) |
50.6 |
60.5 |
| Run Time (min:sec) |
5:44 |
5:02 |
| |
|
|
| Flight Predictions |
|
|
| Stall Speed (mph) |
22 |
21 |
| Optimal Flight Speed (mph) |
29 |
28 |
| Throttle for Optimal (%) |
70 |
68 |
| Duration at Optimal (m:s) |
16:57 |
12:55 |
| Motor Temp at Optimal (°C) |
42 |
41 |
| Hands-off Speed (mph) |
33 |
33 |
| Throttle for Hands-off (%) |
77 |
73 |
| Duration Hands-off (m:s) |
14:21 |
11:09 |
| Motor Temp Hands-off (°C) |
44 |
43 |
| Best Rate of Climb (ft/min) |
519 |
419 |
| Rate of Sink (ft/min) |
-290 |
-281 |