LibrePilot Forum
Users => Vehicles - MultiRotors => Topic started by: liftbag on September 02, 2015, 05:38:29 pm
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I fly with this excellent hex (http://fpv-reconn.com/store/index.php?route=product/product&path=59&product_id=112) for a year.
The project was designed to be very compact and is intended for 5" propellers.
Its strong points are:
- excellent engineering
- high quality materials
- clean/dirty construction
- great configuration flexibility
Looking for more performance, but above all, greater efficiency, the designer (trinco on rcg) created a new version with longer arms to accommodate 6" propellers, the RD350 UBER Hex (http://fpv-reconn.com/store/index.php?route=product/product&path=59&product_id=131).
I must say that although the intent is desirable, a 350 hex is more than I consider practical and pleasant.
But when I saw the solution to overlapping propellers (http://www.rcgroups.com/forums/showpost.php?p=30214760&postcount=902), it was love at first sight.
It was the input to buy the 3D printer and begin to customize my multi-rotors.
(http://imagizer.imageshack.us/v2/640x480q90/540/9U5CsC.jpg) (http://imageshack.com/a/img540/3816/9U5CsC.jpg)
The performance of this compact hex have always been the benchmark for my multi rotors. Extreme precision, power and efficiency, nothing flies better among my copters.
There remains only one minus point compared to quads, the aerodynamic drag.
For this reason, I'm rebuilding from scratch inspired to the TBS Gemini. So partially overlapping propellers thanks to 12° tilted motors.
With the stock arms there is the insurmountable obstacle of the insufficient distance between the rear propellers.
So I designed these banana arms that are in the mill just as I type.
(http://imagizer.imageshack.us/v2/640x480q90/538/gK3knU.png) (http://imageshack.com/a/img538/1126/gK3knU.png)
The tilted motor mounts are already 3D printed.
(http://imagizer.imageshack.us/v2/640x480q90/540/rDynt5.jpg) (http://imageshack.com/a/img540/1262/rDynt5.jpg).
Even the remaining arms have been modified, shortening them to the minimum possible (6mm).
The center of thrust is only 4.5mm behind the center of flight controller, and asymmetries of the arms will be corrected with the matrix table.
(http://imagizer.imageshack.us/v2/640x480q90/673/1B1UAt.png) (http://imageshack.com/a/img673/2258/1B1UAt.png).
Flight controller is the OP Revolution.
I'm excited while waiting to try. I expect improved performance from this build :)
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Wow. A lot of time and development has obviously gone into this frame design. It looks exciting. Can't wait to see and hear more as the build gets airborne.
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I fly with this excellent hex (http://fpv-reconn.com/store/index.php?route=product/product&path=59&product_id=112) for a year.
The project was designed to be very compact and is intended for 5" propellers.
Its strong points are:
- excellent engineering
- high quality materials
- clean/dirty construction
- great configuration flexibility
Looking for more performance, but above all, greater efficiency, the designer (trinco on rcg) created a new version with longer arms to accommodate 6" propellers, the RD350 UBER Hex (http://fpv-reconn.com/store/index.php?route=product/product&path=59&product_id=131).
I must say that although the intent is desirable, a 350 hex is more than I consider practical and pleasant.
But when I saw the solution to overlapping propellers (http://www.rcgroups.com/forums/showpost.php?p=30214760&postcount=902), it was love at first sight.
It was the input to buy the 3D printer and begin to customize my multi-rotors.
(http://imagizer.imageshack.us/v2/640x480q90/540/9U5CsC.jpg) (http://imageshack.com/a/img540/3816/9U5CsC.jpg)
The performance of this compact hex have always been the benchmark for my multi rotors. Extreme precision, power and efficiency, nothing flies better among my copters.
There remains only one minus point compared to quads, the aerodynamic drag.
For this reason, I'm rebuilding from scratch inspired to the TBS Gemini. So partially overlapping propellers thanks to 12° tilted motors.
With the stock arms there is the insurmountable obstacle of the insufficient distance between the rear propellers.
So I designed these banana arms that are in the mill just as I type.
(http://imagizer.imageshack.us/v2/640x480q90/538/gK3knU.png) (http://imageshack.com/a/img538/1126/gK3knU.png)
The tilted motor mounts are already 3D printed.
(http://imagizer.imageshack.us/v2/640x480q90/540/rDynt5.jpg) (http://imageshack.com/a/img540/1262/rDynt5.jpg).
Even the remaining arms have been modified, shortening them to the minimum possible (6mm).
The center of thrust is only 4.5mm behind the center of flight controller, and asymmetries of the arms will be corrected with the matrix table.
(http://imagizer.imageshack.us/v2/640x480q90/673/1B1UAt.png) (http://imageshack.com/a/img673/2258/1B1UAt.png).
Flight controller is the OP Revolution.
I'm excited while waiting to try. I expect improved performance from this build :)
Grande Paolo! Well done!
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Going on. Custom arms made by a friend of mine.
(http://imagizer.imageshack.us/v2/640x480q90/912/bSb2F8.jpg) (http://imageshack.com/a/img912/7130/bSb2F8.jpg)
(http://imagizer.imageshack.us/v2/640x480q90/538/wHxKXT.jpg) (http://imageshack.com/a/img538/7904/wHxKXT.jpg)
(http://imagizer.imageshack.us/v2/640x480q90/537/kinAub.jpg) (http://imageshack.com/a/img537/9916/kinAub.jpg)
(http://imagizer.imageshack.us/v2/640x480q90/910/w0FwOw.jpg) (http://imageshack.com/a/img910/5017/w0FwOw.jpg)
(http://imagizer.imageshack.us/v2/640x480q90/537/5Kf054.jpg) (http://imageshack.com/a/img537/1994/5Kf054.jpg)
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Very sexy liftbag! I'm no engineer so you'll have to excuse me if this is a dumb question but, won't the overlapping props cause a turbulence problem?
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Sure ggrif.
But many claims that partially overlapped props increase efficiency a little bit, different from coaxial props.
Anyway seems that increasing the overlapping area has decreased efficiency.
But I want it small, powerfull and with better efficiency than 5" props, and all goals are achieved.(http://images.tapatalk-cdn.com/15/09/13/3b49fa4dd9ea38c63cde0322f24e976e.jpg)(http://images.tapatalk-cdn.com/15/09/13/c7fe0da57c84690535d064da7dc2cd52.jpg)
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Looks the goods liftbag. Very nice!
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Just a smooth flight while I'm adjusting PIDs with Easy Tune.
https://www.youtube.com/watch?v=1A2XTUaZuB8
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New 3D printed stuff, and Foxeer HD Legend 1 rec cam.
(http://imagizer.imageshack.us/v2/640x480q90/911/ui3PJI.jpg) (http://imageshack.com/a/img911/491/ui3PJI.jpg)
(http://imagizer.imageshack.us/v2/640x480q90/631/EGwSCR.jpg) (http://imageshack.com/a/img631/8626/EGwSCR.jpg)
(http://imagizer.imageshack.us/v2/640x480q90/903/rP8ojk.jpg) (http://imageshack.com/a/img903/2162/rP8ojk.jpg)
(http://imagizer.imageshack.us/v2/640x480q90/905/U9m58A.jpg) (http://imageshack.com/a/img905/251/U9m58A.jpg)
(http://imagizer.imageshack.us/v2/640x480q90/633/EI7G3e.jpg) (http://imageshack.com/a/img633/3825/EI7G3e.jpg)
(http://imagizer.imageshack.us/v2/640x480q90/631/vpauUT.jpg) (http://imageshack.com/a/img631/9873/vpauUT.jpg)
(http://imagizer.imageshack.us/v2/640x480q90/903/tIRdUV.jpg) (http://imageshack.com/a/img903/1550/tIRdUV.jpg)
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Amazing machine friend!
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Truly amazing machine. Where did you get that 3D printed Foxeer holder ?
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Truly amazing machine. Where did you get that 3D printed Foxeer holder ?
Tanks. I have designed and printed the Foxeer holder by myself.
Here is a video of my RD280 made with the Legend1: https://forum.librepilot.org/index.php?topic=48