Apr 09, 2011, 02:29 PM
Winging it Ò>
Joined May 2006
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Here is an example of an entry.

Tricopter weight = 380 grams
Max payload including battery = 386 grams

lift efficiency = 386/380 = 1.016

Duration 9min 11 sec, battery size 1100mAh 3s

Duration Efficiency = 551 sec / (1.1 Ah x 3s) = 167 sec per hA x s

Motors Turnigy 2730-1500
esc's Mystery 12A
GWS 8043 prop
Wii controls

 little Tricopter lifting.wmv (3 min 11 sec)

# Images

Last edited by leadfeather; Apr 17, 2011 at 02:31 PM.
 Apr 09, 2011, 02:47 PM Registered User Joined Feb 2011 1,837 Posts I'm all for some fun contests. To keep things real I think there needs to be rules associated with the heavy lift. It is easy to bounce an unflyable payload in the air for a few seconds. I think some kind of duration or distance needs to be defined before a lift is considered real. This will demonstrate full control of the vehicle and payload. Obviously some sort of video is needed for verification.
 Apr 09, 2011, 02:59 PM What? I was too busy flying... Joined Jan 2011 189 Posts For the lifts I think it would work to have a lift/ weight ratio. So if your copter weighs a pound/kilogram/grams, put that in a ratio with how much it lifts. I.E. the copter weighs 1 pound. It lifts 2 pounds. So the ratio would be 1:1.
Apr 09, 2011, 03:04 PM
Winging it Ò>
Joined May 2006
10,423 Posts
Quote:
 Originally Posted by Woodchuck12 For the lifts I think it would work to have a lift/ weight ratio. So if your copter weighs a pound/kilogram/grams, put that in a ratio with how much it lifts. I.E. the copter weighs 1 pound. It lifts 2 pounds. So the ratio would be 1:1.
Apr 09, 2011, 03:05 PM
Winging it Ò>
Joined May 2006
10,423 Posts
Quote:
 Originally Posted by milo12 I'm all for some fun contests. To keep things real I think there needs to be rules associated with the heavy lift. It is easy to bounce an unflyable payload in the air for a few seconds. I think some kind of duration or distance needs to be defined before a lift is considered real. This will demonstrate full control of the vehicle and payload. Obviously some sort of video is needed for verification.
Good point. How about a minimum duration of 30 seconds, payload and copter to stay above 6 feet for the duration.
 Apr 09, 2011, 10:34 PM Inherent Tinkerer Wichita, Kansas, USA Joined Jul 2003 1,472 Posts Now it HAVE to fix my Quad!!!! Jimmy
Apr 10, 2011, 07:35 AM
Winging it Ò>
Joined May 2006
10,423 Posts
Quote:
 Originally Posted by jtprouty Now it HAVE to fix my Quad!!!! Jimmy
Did you have a choice anyway?

Also, for this competition, anyone can make new entry's as often as they like. Made a new copter or improved on an existing entry...please feel free to post again.

I'm looking forward to seeing lots of different designs and also I'm looking forward to seeing if there are any trends that distinguish the winners.

For example, I have done some bench top testing on motors and props. One trend I have seen is that a lower kV motor when matched well with a propeller in general will require less power for the same thrust. At the same time, it seemed that the maximum thrust did not always get better with lower kV. Now I'd like to see if the bench testing has any bearing on what works in actual flight.
 Apr 10, 2011, 07:50 AM Registered User Joined May 2005 1,197 Posts hmmm... Guess 10-12kg is no problem. But to risk all 4 of my batteries in one 30second try..... dont think so ! The such of AMP is so high that I fear the battery will suffer from this. why not 10second and not 30 ?
Apr 10, 2011, 07:55 AM
Winging it Ò>
Joined May 2006
10,423 Posts
Quote:
 Originally Posted by liteglow hmmm... Guess 10-12kg is no problem. But to risk all 4 of my batteries in one 30second try..... dont think so ! The such of AMP is so high that I fear the battery will suffer from this. why not 10second and not 30 ?
10-12 kG would be very impressive.

OK, let's try 10 seconds to protect the equipment. I'll modify the first post.
Apr 10, 2011, 10:36 AM
Registered User
Joined May 2005
1,197 Posts
Quote:
 Originally Posted by leadfeather 10-12 kG would be very impressive. OK, let's try 10 seconds to protect the equipment. I'll modify the first post.
Sorry I maybe got something wrong here
10-12kg is included the copter (3.4kg)

So I will try to lift 6-8kg payload

Dont know if it`s possible.
But last time I did the test I`m sure I got some more throttle to give.
The problem with FY90Q is that, after you reach full throttle, there is NO auto stabilization left !!!
 Apr 10, 2011, 02:49 PM Registered User Joined Jan 2010 194 Posts im going to be shooting for the first category MR heavy lifter as soon as i get things squared away with the new frame
Apr 10, 2011, 05:05 PM
United States, TX, San Antonio
Joined Feb 2007
15,270 Posts
Hi Gents,
To piggy back on Milo's suggestion and you are headed in the right direction, may I also suggest a few more rules. What is the point of lifting weight in a flying vehicle for 30 seconds and not doing any controlled flying? I suggest flying a set sized figure 8 course and altitudes to make it a more useful competition. The flying duration should be usable not 30 seconds, but more like 2 minutes, all documented in raw video verified for non-editing. Maybe others will have verification ideas to add too? And reqarding the duration efficiency competition...please don't make this another Mr. Holger sit motionless for 30 minutes and hover demo... A duration test being run on a continuous circuit with x minutes hover in between would be a much more operationally useful competition and information. FWIW
Cheers,
Jim
Vote for my Bro Joe every day in April here: Quadrocopter and Tricopter Mega Link Index

Quote:
 Originally Posted by leadfeather Good point. How about a minimum duration of 30 seconds, payload and copter to stay above 6 feet for the duration.
Last edited by jesolins; Apr 10, 2011 at 05:10 PM.
Apr 10, 2011, 05:48 PM
Winging it Ò>
Joined May 2006
10,423 Posts
Quote:
 Originally Posted by jesolins Hi Gents, To piggy back on Milo's suggestion and you are headed in the right direction, may I also suggest a few more rules. What is the point of lifting weight in a flying vehicle for 30 seconds and not doing any controlled flying? I suggest flying a set sized figure 8 course and altitudes to make it a more useful competition. The flying duration should be usable not 30 seconds, but more like 2 minutes, all documented in raw video verified for non-editing. Maybe others will have verification ideas to add too? And reqarding the duration efficiency competition...please don't make this another Mr. Holger sit motionless for 30 minutes and hover demo... A duration test being run on a continuous circuit with x minutes hover in between would be a much more operationally useful competition and information. FWIW Cheers, Jim Vote for my Bro Joe every day in April here: Quadrocopter and Tricopter Mega Link Index
Apr 10, 2011, 06:04 PM
United States, TX, San Antonio
Joined Feb 2007
15,270 Posts
There you go Not to offend anyone but even those human dead lift Gents have trouble navigating themselves around It would be a good comparison
Cheers,
Jim
Vote for my Bro Joe every day in April here: Quadrocopter and Tricopter Mega Link Index
Quote: