Replies to This Discussion

Permalink Reply by Michael Krader on November 26, 2011 at 1:11pm

imho dont think it would make that much of a difference.

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Permalink Reply by HangerRat on February 12, 2012 at 9:02pm

Gareth,

I am curious to know how this bird is flying?  Are you able to get the kind of flight times seen on this page:

http://www.mikrokopter.de/ucwiki/en/FlightTime#MikroKopter_as_Okto_XL

Thanks,

Mike

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Permalink Reply by Gareth Rens on February 15, 2012 at 12:58am

Hi Mike, not even close. The turnigy motors are not the most efficient for their weight. I get around 8 mins flight time with 2x 5000mah 4S. My weight excluding batteries is around 5kgs.

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Permalink Reply by HangerRat on February 15, 2012 at 9:42am

Gareth,

Thanks for your note, I appreciate the feedback from someone with hands on knowledge. Can I ask a few more questions.

1. Besides the motors, are other parts different than the normal MK Octo XL build parts?

2. Did you use their octo power distribution bus with the build in ESC's?

3. Where do you think your flying weight without batteries differs from their configuration: Octo XL weight 1830g without Lipo., I got this from the wiki page where that Mikrocopter flies for around 35 minutes

I am trying to get an idea of where your bird is different than theirs.

Thanks again,

Mike

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Permalink Reply by Gareth Rens on February 15, 2012 at 10:53am

Hi Mike

The only thing on the the whole octo thats mikrokopter is the frame, well WAS the frame...

I had a bit of an accident a few weeks ago and fragged pretty much ALL the arms.

Replaced them with 12mm square al tube all the same length and flew it half an hour ago. Flies fine, a bit wobbly (pids)

Heres a link to all the components: http://diydrones.com/profiles/blogs/frankencopter-build-coming-soon...

I used the octo PDB from photoship one. Had to make a few mods but it worked nicely.

I would say the main thing that seperates mine from MK are the motors and ESCS.

My motors weigh +140g and the escs around 100g. The reason I went with them was mainly because the turnigys are $30/motor and $30/esc. If I break any, I can afford (kinda) to replace them. The AXI motors are $100 and up, and so are the escs. Im nervous flying the thing with 30 buck motors and escs, I would be a shaking wreck if they were 100 buck jobs.

This is my first octo, so its better to go with the cheaper options until I can fly like a pro.

Ones first car should always be a bit of a jaloppie ;)

The only thing I do have over the MK is thrust. I have 19.8kgs...

G:)

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Permalink Reply by HangerRat on February 15, 2012 at 2:14pm

Gareth,

This is great information, thanks for sending that. I agree about flying a jaloppie, it could get expensive with very good motors.

The info I could find regarding the weight of the Octo LX frame is:

>>Mikrocopter Octo XL - frame kit with lipo holder, landing gear xl, clear cover
480 grams

Does that sound accurate based on your build?

I see others posting to your blog, very good info. I went out and looked at the CarbonCore frames, they look very nice. But seem weight a fair amount more than the MK .

I'm building a set of Ecalc scenarios, fun stuff.  I ordered a 3DR Quad as a first time experiment/learner. Hope it gets here soon.

Thanks,

Mike

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