my quad project

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my quad project

Postby cartti » Sun Dec 23, 2012 11:05 pm

Just wanted to show my monstrosity i have been working on. Nearly ready for calibration. Only esc's and battery mounting missing.
Worth mentioning that these are 17 inch props. Just to give perspective about the scale of this thing.
aq.jpg
cartti
 
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Re: my quad project

Postby LPR » Mon Dec 24, 2012 4:24 am

Car

Welcome
Your quad is going to just float with those big props. I don't think I have ever seen motor like yours.
Bill has the record for the longest AQ flight, one hour and 20 minuets. With the right batteries you could do better maybe.
I found you really should keep the AQ board in the exact center of the multicopter because you will notice your altitude hold not being the best if it is just a little off center.

Larry
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Re: my quad project

Postby cartti » Mon Dec 24, 2012 9:50 am

LPR wrote:Car

Welcome
Your quad is going to just float with those big props. I don't think I have ever seen motor like yours.
Bill has the record for the longest AQ flight, one hour and 20 minuets. With the right batteries you could do better maybe.
I found you really should keep the AQ board in the exact center of the multicopter because you will notice your altitude hold not being the best if it is just a little off center.

Larry
Thank you. :)
Motors are self made that i have been working on last 5-6 months developing on my free time. I havent measured efficiency with esc32's yet, but amp draw was significantly lower (~20%) with same head speed.
pic.jpg


Here is the original efficiency chart with 4S and cheap linear esc
chart3.png
chart3.png (11.63 KiB) Viewed 3827 times


AQ board is mounted to gravity center at this moment.
cartti
 
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Re: my quad project

Postby kinderkram » Mon Dec 24, 2012 11:17 am

Welcome to the club, cartti!
Can't wait to see that monster cutting through the air. The motors look well engineered and powerful.
I can't remember anyone using 17" CF props on the AQ6 - so this is going to be a novelty.

Norbert
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Re: my quad project

Postby bn999 » Mon Dec 24, 2012 4:17 pm

Very interesting machine. Do you have a projected flight weight? The motors look like they have very good potential for efficiency. What Kv do they come out to?

I've spent time trying to tune attitude PIDs for a hex with an similar asymmetric, large arm span and found that it is not easy, especially with slow turning props. However, it ended up being the most stable and smooth flying machine I've ever worked on.
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Re: my quad project

Postby LPR » Mon Dec 24, 2012 4:38 pm

We could be looking at a quad that could hang in the air for TWO HOURS using Panasonic 18650B batteries.
I'm very interested in your motors. I can see many benefits and a couple of difficulties using this style of motors.
The AQ autopilot will be a good fit for your copter. They are both one of a kind.

Larry
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Re: my quad project

Postby boriss » Tue Dec 25, 2012 10:18 am

very nice motors. Please keep us updated on them. Probably least important but i really dig the design, beauties !

Boris
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Re: my quad project

Postby afernan » Tue Dec 25, 2012 10:57 am

Congratullations , Cartti. Love this developments like yours. Looking forward your flights.

Image below shows my quad using 16x6.5 inch props (1kg). It flies very smooth but doesn't like at all any wind. I think is too light for this props.
Attachments
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uploadfromtaptalk1356429420152.jpg (92.42 KiB) Viewed 3614 times
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Re: my quad project

Postby cartti » Tue Dec 25, 2012 3:51 pm

kinderkram wrote:Welcome to the club, cartti!
Can't wait to see that monster cutting through the air. The motors look well engineered and powerful.
I can't remember anyone using 17" CF props on the AQ6 - so this is going to be a novelty.

Norbert
Thank you!
Motors are actually designed for 19-20inch props to get optimal efficiency, but i havent found lightweight, cw and ccw and low pitch carbon props in that size. There is so much torque these 17 inchers spins like its nothing there.. :)

bn999 wrote:Very interesting machine. Do you have a projected flight weight? The motors look like they have very good potential for efficiency. What Kv do they come out to?

I've spent time trying to tune attitude PIDs for a hex with an similar asymmetric, large arm span and found that it is not easy, especially with slow turning props. However, it ended up being the most stable and smooth flying machine I've ever worked on.
AUW will be around 1,5kg with single 5000mAh 4S. Single motor weight is 97grams and Kv is 260. I could easily get around 200grams off the frame weight with better materials and tools.

LPR wrote:We could be looking at a quad that could hang in the air for TWO HOURS using Panasonic 18650B batteries.
I'm very interested in your motors. I can see many benefits and a couple of difficulties using this style of motors.
The AQ autopilot will be a good fit for your copter. They are both one of a kind.

Larry
Would be very interesting to make massive battery pack out of those, but around 500$ for a single battery pack is kinda high price to pay. :)

boriss wrote:very nice motors. Please keep us updated on them. Probably least important but i really dig the design, beauties !

Boris
Thank you! :) I will post more when project continues. At this moment everything else is done, but i havent got my receiver -> aq ppm connection to work..

afernan wrote:Congratullations , Cartti. Love this developments like yours. Looking forward your flights.

Image below shows my quad using 16x6.5 inch props (1kg). It flies very smooth but doesn't like at all any wind. I think is too light for this props.
Thank you. :)

I would love to actually have access to a machinery that could produce these with cnc. There has been a lot of ppl interested on many forums, but sadly with manual lathe etc its just not worth to make these for others. I have used literally hundreds of hours testing and making prototypes of these and even now that i know "how to do it" it would take around 50 hours to make set of four motors. Would be really fun to see what other ppl could do with these motors.

Got any vid's of your quad? :)
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Re: my quad project

Postby LPR » Tue Dec 25, 2012 6:58 pm

Catti

I have a friend that has a shop that is making a wide variety products and has helped me build my octo frames. One of the many things he builds is BMX bike aluminium wheel hubs with his CNC mills.

http://www.onyxbmx.com/

He used his water jet to cut out the frame centers for the octo.

https://www.youtube.com/watch?v=_7im1ExXEug

Send me a PM if your interested.

Larry
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