Hey everybody,
so, about a week ago I crashed my Blunt Nose Versa Wing. It was my main FPV-Plattform. I always had a little trouble launching that thing safe. So my thought was, ok, wings still good, servo for Pan-Function of the camera - gone, 4000 mah 3S Lipo - gone, Blunt Nose - needs some fixing done, Motor mount - torn from plane! Yeah, I thought it is time for a plane that I can rely on more when it comes to launching.
So I started searching on the Internet (mainly Google Pictures search) for some nice looking and at the same time easy to launch mule to carry my APM Setup plus FPV-Setup plus Gopro for nicer Video afterwards. What kept poppong up was the URSUS by some polish guy who turns out to be a genius. It is a twin boom pusher with loads of space in it, wingspan is 180cm and overall flightweight about 1,5 kg. It could run of a standard sized motor and had the ability to take off from ground. Here is a picture:
I wanted to build that thing from scratch, so I ended up taking measurements from pictures, calculating, buying depron, and so on...
I started with the wing. Wanted it to be 140cm wingspann and detachable so I could transport it easier:
So now I have the two outer wingparts each 46 cm wide with a 19cm wingchord. It is reinforced with balsa and plywood as well as a 5mm Carbon rod all through the wing (at least one meter). In the plywood I added a threaded bolt (where the wings are screwed together! And on leading and trailing edge I added a popsicle stick to hold the wing in place. The complete wing is made of 5mm depron covered on one side!
Next up was the fuselage. My first attempt was to use 5mm depron that I would reinforce with a wooden box from front to end. That was wobbling around a lot so I decided I had to use stronger depron. Here you can see what I came up with:
So I used a layer of 5mm depron combined with 10mm depron. This gave the fuselage a lot more stability and me a bigger protion to glue to. In the middle I made two formers of the 10mm depron just to help the box keep its shape no matter what!
The wing/fuselage joint was relatively easy to do. It is basically a 2mm plywood epoxied to the top of the fuselage and on the inner sides of the fuselage 1mm plywood, ca´ed to the 2mm part. Put some threads on there and there we go. On that I epoxied the motormount I had left over from the Blunt Nose Versa.
Now came the tricky part. I did not want to use carbon rods for booms, it had to look like the original. So I went for a layer of 5mm - 10mm - 5mm depron. The 10mm part also becoming the rudders and on the long side a carbon rod glued into it to make it very stable! The connection between the two booms would obviously be the elevator, made of two layers of 5mm depron sanded in shape just like the rudders.
Back to the fuselage. I wanted this plane to be my main FPV Plattform. I chose a pusher setup because I did not want any prop in my sight and I also did not want a skanky camera to be on top of or on front of the plane. So I put the main FPV cam right into the nose with just the lens seeking out of it. On top of that a little laid back is the Gopro velcroed to some plywood.
For now this is my progress, except for the booms, the plane is covered in red and black, FPV-cam mounted, Servos installed, receiver installed, motor ready (with a slight upwards angle!)! Next step is the maiden as soon as the weather and my allergy allow it. Here some more photos, also, I´d be really happy for some feedback. Maybe some of you highly professionals have some input, some mistakes I might have made but can´t see or just how you like it
so, about a week ago I crashed my Blunt Nose Versa Wing. It was my main FPV-Plattform. I always had a little trouble launching that thing safe. So my thought was, ok, wings still good, servo for Pan-Function of the camera - gone, 4000 mah 3S Lipo - gone, Blunt Nose - needs some fixing done, Motor mount - torn from plane! Yeah, I thought it is time for a plane that I can rely on more when it comes to launching.
So I started searching on the Internet (mainly Google Pictures search) for some nice looking and at the same time easy to launch mule to carry my APM Setup plus FPV-Setup plus Gopro for nicer Video afterwards. What kept poppong up was the URSUS by some polish guy who turns out to be a genius. It is a twin boom pusher with loads of space in it, wingspan is 180cm and overall flightweight about 1,5 kg. It could run of a standard sized motor and had the ability to take off from ground. Here is a picture:
I wanted to build that thing from scratch, so I ended up taking measurements from pictures, calculating, buying depron, and so on...
I started with the wing. Wanted it to be 140cm wingspann and detachable so I could transport it easier:
So now I have the two outer wingparts each 46 cm wide with a 19cm wingchord. It is reinforced with balsa and plywood as well as a 5mm Carbon rod all through the wing (at least one meter). In the plywood I added a threaded bolt (where the wings are screwed together! And on leading and trailing edge I added a popsicle stick to hold the wing in place. The complete wing is made of 5mm depron covered on one side!
Next up was the fuselage. My first attempt was to use 5mm depron that I would reinforce with a wooden box from front to end. That was wobbling around a lot so I decided I had to use stronger depron. Here you can see what I came up with:
So I used a layer of 5mm depron combined with 10mm depron. This gave the fuselage a lot more stability and me a bigger protion to glue to. In the middle I made two formers of the 10mm depron just to help the box keep its shape no matter what!
The wing/fuselage joint was relatively easy to do. It is basically a 2mm plywood epoxied to the top of the fuselage and on the inner sides of the fuselage 1mm plywood, ca´ed to the 2mm part. Put some threads on there and there we go. On that I epoxied the motormount I had left over from the Blunt Nose Versa.
Now came the tricky part. I did not want to use carbon rods for booms, it had to look like the original. So I went for a layer of 5mm - 10mm - 5mm depron. The 10mm part also becoming the rudders and on the long side a carbon rod glued into it to make it very stable! The connection between the two booms would obviously be the elevator, made of two layers of 5mm depron sanded in shape just like the rudders.
Back to the fuselage. I wanted this plane to be my main FPV Plattform. I chose a pusher setup because I did not want any prop in my sight and I also did not want a skanky camera to be on top of or on front of the plane. So I put the main FPV cam right into the nose with just the lens seeking out of it. On top of that a little laid back is the Gopro velcroed to some plywood.
For now this is my progress, except for the booms, the plane is covered in red and black, FPV-cam mounted, Servos installed, receiver installed, motor ready (with a slight upwards angle!)! Next step is the maiden as soon as the weather and my allergy allow it. Here some more photos, also, I´d be really happy for some feedback. Maybe some of you highly professionals have some input, some mistakes I might have made but can´t see or just how you like it
![img_0018[1].jpg](https://ftforumx2.s3.amazonaws.com/2015/05/99217_b35736ba19185e76b53e01367bc942ef.jpg "img_0018[1].jpg")
![img_0019[1].jpg](https://ftforumx2.s3.amazonaws.com/2015/05/99219_e6050b2a1b984dc8f5384780f35905aa.jpg "img_0019[1].jpg")
![img_0020[1].jpg](https://ftforumx2.s3.amazonaws.com/2015/05/99220_9908d7ec162643d8abc7d071772ed5f4.jpg "img_0020[1].jpg")
