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Old Oct 10, 2012, 10:15 PM
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Colorado
Joined Oct 2004
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Advantage of multi-rotors??

What is the advantage(s) of multi-rotor configurations (besides being a lot a fun) as opposed to the single rotor (traditional heli) style??
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Old Oct 10, 2012, 11:27 PM
we dont NEED roads!
AcroFPV's Avatar
United States, CA, Rocklin
Joined Aug 2012
3,418 Posts
Easier to fly, and can haul more weight.
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Old Oct 10, 2012, 11:35 PM
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Indonesia, Jakarta
Joined Sep 2012
466 Posts
not too complex as a heli , and also scratchbuild-able
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Old Oct 10, 2012, 11:48 PM
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United States, FL, Miami Beach
Joined Jun 2012
307 Posts
Simple.
Easier to build.
Easier to fix.
Cheaper to fix after a crash.
Tougher. Most of the time less things break/bend compared a heli.
Easier to fly.
The flight controllers can do amazing things.. GPS hold, Return to home, Carefree, Autoland, Waypoint mission flights...
Etc.....
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Old Oct 11, 2012, 04:02 AM
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Colorado
Joined Oct 2004
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So far, all the reasons given (except for the one that says that they can haul more weight - which is incorrect) make multi-rotors a really fun toy for hobbyists to play with. Let me rephrase the question. Are there any advantages of multi-rotors over conventional single-rotor configurations for real-world, commercial/military applications?
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Old Oct 11, 2012, 04:34 AM
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Romania, Dolj, Craiova
Joined Sep 2007
15,225 Posts
Wrong forum, we are hobbyists
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Old Oct 11, 2012, 04:53 AM
The END.....ha!
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Australia, SA, Edinburgh
Joined Aug 2009
5,889 Posts
I can haul an all up weight between 12.5 and 13kg for around 6 minutes with a 1355.6mm span (1m span octo running 14" props).That's fairly efficient. Many professional AP fliers have gone from single rotor to multirotor and say they would never go back.

Mark
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Old Oct 11, 2012, 05:06 AM
I'll fly anything...
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Hamilton, New Zealand
Joined Jan 2007
964 Posts
Firstly - I am a part-time commercial AP photographer and have been for 5 years.

I have sold my Trex-600 cameraship and do all my commercial aerial photo work by multicopter now. The customers see it as a smaller risk. I thought they were being soft until (after a 9 month heli break) I started up my Trex-700 camera ship on my back yard. While it was spooling up, I found myself stepping back being cautious. If I felt like that, it is no wonder some of the customers find helis intimidating!

Advantages of a multi over a heli:
# I can comfortably fly a multi in a more confined area than a heli - including a photo and video shoot inside a working galvanizing factory.
# Smaller moving chopping parts.
# Easier and quicker to repair than a heli. The basic build is a similar cost.
# More stable - I am able to solo shoot with a mono-lcd eyewear (eyetops).

Advantage of a heli:
# Orientation. I could fly my T600 to 800' and know which way it was pointing. I could fly it 250 yards away and know which way it was. The multi - even with lights is symmetrical over 300' or 100 yards away.

I still have the 700 but I don't know when I will use it. For the really big jobs where I need to go over 400', I factor in the hire of a C172 aircraft (as I did today). I did 3 jobs during one hire. Know your limits - a risky job isn't worth a heli or multi...

Just my 2c worth!

Pete
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Old Oct 11, 2012, 05:10 AM
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Romania, Dolj, Craiova
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rmteo is correct, physics prove that multirotors does not scale efficiently.
A tricopter can theoretically fly more than your setup, but needs bigger props and motors of course.
Your main gain is redundancy, you can afford and arm failure, maybe even two.
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