Feigao - 1308412S
Specifications
- Type: Inrunner
- Weight: 50.00g (1.76oz)
- Diameter: 20.00mm (0.79in)
- Length: 30.00mm (1.18in)
- Shaft Diameter: 2.30mm (0.09in)
- Maximum Amps: 18
Constants
- kV: 7800
- Rm: 0
- Io: 0
Test Data
Dr Kiwi test results
| Propeller | Gear Ratio | Volts | Amps | Watts | RPM | Speed (mph) | Thrust (g) | Thrust (oz) | RPM as % of Kv*V |
|---|---|---|---|---|---|---|---|---|---|
| APC SF 7x4 | 4.43 | 6.6 | 13 | 85 | 10680 | 40.5 | 420 | 14.82 | 92% |
| GWS HD 8x4 | 5.33 | 6.7 | 10.7 | 71 | 9300 | 35.2 | 420 | 14.82 | 95% |
| GWS HD 9x5 | 6.6 | 6.7 | 8 | 53 | 6480 | 30.7 | 394 | 13.90 | 82% |
Comments
fang on 2013-11-02 09:42:40
Hi Dr. Kiwi,
Thank you for the hard work and for sharing the information with us! As I'm randomly browsing through the data on this site, I came across this page which confused me.
Consider the last two rows in the table above (GWS HD8x4 and GWS HD9x5). For the same motor driven by the same voltage, how can one propeller show both lower RPM and lower current than the other? As I understood the current is linear in RPM with a negative slope. Also, the "RPM" column doesn't seem to agree with the "RPM as % of Kv*V" column.
I carefully read your thread "Motor Data - test bench data for several hundred brushless motors" on RCGroups, and I think I understand your experiment procedure. I'm wondering if I'm missing something important here. It'd be great if you can clarify it a bit to me. Thank you very much!
Regards,
Fang Da
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Thank you for the hard work and for sharing the information with us! As I'm randomly browsing through the data on this site, I came across this page which confused me.
Consider the last two rows in the table above (GWS HD8x4 and GWS HD9x5). For the same motor driven by the same voltage, how can one propeller show both lower RPM and lower current than the other? As I understood the current is linear in RPM with a negative slope. Also, the "RPM" column doesn't seem to agree with the "RPM as % of Kv*V" column.
I carefully read your thread "Motor Data - test bench data for several hundred brushless motors" on RCGroups, and I think I understand your experiment procedure. I'm wondering if I'm missing something important here. It'd be great if you can clarify it a bit to me. Thank you very much!
Regards,
Fang Da