3D Robotics

First impression of Raven clone model

Today the $170 Raven clone we were talking about the other day arrived. Here are some quick impressions after unpacking it.


First, it's BIG. The wingspan is 60" (152 cm), which is about 15% bigger than the real Raven RQ-11 (130cm). Here you can see it head to head with a stock EasyStar.




The build quality seems pretty good. It's all balsa/ply, with no fiberglass or plastic. The tail boom is an aluminum tube. None of it seems very sturdy, however--this is nothing like the real Raven, which is made of carbon fiber and kevlar and designed to crash land.


However, the model comes with NO instructions, and I really have no idea how the wing is supposed to attach to the body, or where the CG is supposed to be, to say nothing of where the rudder and elevator servos are supposed to go, since the interior of the body is totally empty. There are hatches in the wing for the aileron servos, but no mounting rails.




The tail boom just slides into a hole in the body. I guess you're supposed to drill screw holes or something. No clues given.



The motor mount. No information given on suggested motor or prop.



Here's the inside of the body. Basically, this is an empty vessel. You'll have to do a lot of work creating a plywood interior framework for electronics and such.



Wings are built-up balsa. I suppose you're supposed to epoxy the three segments together. I don't see any way to have the wing disassemble into pieces for transport.



It comes with a small bag of generic hardware, including some joke foam wheels and mounting brackets for landing gear that it doesn't have. This is almost certainly a hardware pack intended for another plane. There seems to be no connection to the Raven, although the control horns and fabric hinges could certainly be used on this model. Perplexing...



Bottom line: I really don't think this is the plane for me. Even with instructions, this is going to take many hours to get ready to fly. It's going to be hard to transport, with its large size and one-piece wing, and I'm worried about how it will handle hard landings. The tail boom mount looks fragile to me, and I really can't see how the wing mount can be anything but a fracture waiting to happen.


I think this might work as a very large display model for shows, but I can't really see it holding up to much real flying.


And without instructions, I wouldn't even try making it. For a $170 model, I'd expect more polish. In short, based on what I've seen so far, I can't recommend this.

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Comments

  • Hi Morli.
    Boom attachment to main fuselage, with only epoxy. Maybe after hard working, can be usefull for easy transformation.
    I suggest Our Composite Airplane for easy transportation.
  • 3D Robotics
    Adnan,

    Thanks for that. I'll try creating some sort of rubber band mount for the wing.

    For everyone else, as mentioned before Adnan and FPVhobbies.com has been very reliable and responsive throughout. The problems are mostly with the Chinese manufacturer of this plane.
  • Admin
    Hi Adnan,
    What about boom attachment to main fuselage, is there any cross bolt/screws or is it supposed to be epoxied to fuse? Any idea if boom is removable for transportation? Thanks for clarification.
  • Yes you are right about main wing screws. My partner in China fly with US Army FPV Airplane. He use rubber bands for to fit main wings. He says main wing screws are not usefull and safe for hard landing.

    There is no instruction manual even Chinese. I just learned also. Wood airplanes more difficult than foam and needs instruction manual. Therefore I will not to continue with this airplane, I will not sell.

    Best regards.
    Adnan.
  • AP1-1.jpg

  • 3D Robotics
    Adnan,

    Thanks for the comment and clarifications. Is there an instruction manual? If so, can you upload it as a pdf here?

    I saw those long thin screws in the box, but could not believe that I was supposed to attach a wing that way. There is no way for them to break away in the case of a crash, so they would just rip the wing apart. Normally large plastic bolts and plastic mountings are used for that (as in the case of the real Raven), or rubber bands.

    Is there any video of this plane in flight?
  • Hi Everyone
    Hi Chris
    I heard now, you are in trouble with US Army FPV Airplane.
    First of all, I am sorry for instruction manual. And why did not send e-mail me?
    I can tell you about main wing, there two screw holes on the main wing. Please find them. They areunder the covering film. Open them. There are 2 nuts over the body please find them. They are under the covering film also. There are two long screws in the original box. You can fit the main wing to body with 2 long screws. Please look below photo:

    AP1-3.jpg


    There are 2 servo holes at the bottom side of main wing for aileron servos. Please fit servos like below photos.

    AP1-4.jpg


    For rudder and elevator servos, please open a long hole from near the rudder. Hole side of aluminium tail boom. This hole for rudder and elevator servos cables. Put the servos cables in the aluminum tail boom and get them inside to front of body.

    AP1-11.jpg

    AP1-7.jpg


    AP1-6.jpg


    We are use 2835-08 FSD brushless motor with this airplane. 3-4S LiPo can use. As prop 9060 APC as well. You can 30-40A ESC with this motor. Maximum current is 25A
    I suggest 4S 3000-4500mAh LiPo batteries for this airplane.
    2835-08 brushless motor link from USA is: http://cgi.ebay.com/MP2835-08-1038kv-Brushless-Outrunner-68g-RC-Max...

    120.jpg


    AP1-10.jpg


    AP1-5.jpg


    If you are unhappy with this airplane, you can send back to me. I can refund your payment. We have phisical store in Istanbul since 2004, our customers is important for us.
    Sorry for my English :)

    Best regards from Istanbul.
    FPVhobby team
    Adnan.
  • Moderator
    The point where the nose begins and the main portion of the fuse (square dimentions). Just looking to get an idea of how pointy to make the nose and rear portions of the fuse. I'm going to take a poke at making one of these with sheet foam, just for kicks. I'm just going "close enough", but for instance I had no idea that the total length of the fuse was 22.25... Bigger than I expected.
  • 3D Robotics
    L: 22.25" (from nose to boom opening), W; 3.5", H: 5.5"

    Not sure what you mean by "where taper begins"
  • Moderator
    @ Chris when/if you have a chance, can you provide the basic numbers (LxWxH) on the main fuse of the Raven Plane? If you can please provide LxW from points where taper begins fore and aft and then inches from that point to the tip and to the boom opening. Thanks
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