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Old Aug 04, 2013, 06:30 AM
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Test new Plettenberg Orbit 15-34 with the Mejzlik 15x5 propeller.

This combo had a 5 minutes test run on 1200 grams, with an ambient temperature of 26 the motor reached a max temperature of 48, so in total 22 above ambient.


Plus/minus Amp's draw by different weights and config's,

Hexa AUW 4Kg: 15,9A
Hexa AUW 5Kg: 21A
Hexa AUW 6Kg: 26,2A
Hexa AUW 7Kg: 34,3A
Octo AUW 7Kg: 30,4A
Octo AUW 8Kg: 35,6A
Octo AUW 9Kg: 42,4A
Octo AUW 10Kg: 50,4A
Octo AUW 11Kg: 56,8A
Octo AUW 12Kg: 66A
Octo AUW 13Kg: 73,6A
Octo AUW 14Kg: 83,2A

Plettenberg Orbit 15-34 / Mejzlik 15x5 / 6S (5 min 59 sec)
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Old Aug 08, 2013, 04:32 PM
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Conversion of the pan to brushless,





















Mirror test,
Flexacopter BDD mount now with brushless pan (0 min 35 sec)
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Last edited by holco; Aug 09, 2013 at 01:57 AM.
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Old Aug 09, 2013, 10:23 AM
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Flexacopter BDD mount now with brushless pan2 (1 min 6 sec)
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Old Aug 12, 2013, 07:00 PM
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First test shoot with the brushless pan.
10 aug brushless pan test shoot with gopro (6 min 52 sec)
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Old Aug 21, 2013, 03:32 PM
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DJI retracts on the Kratos



Kratos with DJI retractable landing gear (1 min 46 sec)
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Old Aug 22, 2013, 04:05 AM
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Weight for one leg,

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Old Nov 02, 2013, 05:28 AM
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Teaser,

BIG pan axle bearing hub, (61705-2RS)

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Last edited by holco; Nov 02, 2013 at 06:04 AM.
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Old Nov 02, 2013, 05:59 AM
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Old Nov 08, 2013, 04:55 AM
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Ready to go to the anodizer



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Old Nov 14, 2013, 02:33 AM
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All fitting perfectly

Pan-bearing with 25mm shaft,
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Old Dec 01, 2013, 03:17 AM
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V2 wire-damper brackets, more than 50% weight reduction.











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Old Jan 15, 2014, 12:16 AM
Scraghty
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Can someone please correct my math. AUW of 10kg / 8 motors = 1250 grams thrust needed per motor. x2 for 50% hover efficiency = 2500 grams thrust.

How does this motor with 1256 thust, get of the ground. Im doing something wrong. Clearly a rookie mistake. Thanxs,

Quote:
Originally Posted by holco View Post
Made a prediction of the flying time with a theoretical AUW of 10Kg for the Kratos.

Snapshot of the video at 1256g lift, this shows that there is +/- 7,65A running.



7,65A X 8 = 61,2A total

80% of 16000mAh lipo = 12800mAh or 12,8Ah

12,8 61,2 = 0,209 hour

0,209 X 60 = 12,54 minutes total flying time

Seems to me a very nice result
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