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Thread: FPV TEK SUMO Try 2 Mountan plane

  1. #1
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    FPV TEK SUMO Try 2 Mountan plane

    ey everyone I am just finishing up the build on my second FPV TEK SUMO. My first one is lost in the wilderness, I miss it...
    I live in the mountains so I build for mountain flying. In my mind that means more weight, more power for high wing loading to deal with gusts and wind, and a stability system.
    my power setup is:
    1400kv 35-30 outrunner
    40a Kforce ESC
    2X2200mah 3S batteries

    My last plane had a 35-36 outrunner which gave it better that 1 to 1 thrust and a top speed in the 80s mph with an 18 to 25 min flight time. I opted for the 35-30 because it was a lot lighter I stuggled to get enough weight forward with my lat model, and it seemed to have a similar output. In practice with test run ups it doesn't seem to have the same power, though it could be do to lost efficiency because I also moved the motor mount further forward.

    For control I am using the following:
    2X T Pro MG90 metal gear servos.
    FY-21AP stability system and autopilot.
    Corona RP8D1 72mhz receiver. I had one on these on my last plane and they are awsome! I fly at 9000ft with no hitches at all.)

    I use 72mhz for fpv and leave my dx7 for normal planes. 72mhz is awesomely reliable, anyone who is serious about medium to long range fpv should really consider it.
    I had a fp-20 on my last plane that I bought on a deal off rcgroups and was blown away at how well it worked. I stepped up the model to add return to home as a fail safe. I fly in conditions that I would never consider without it.

    for video I went all ImmersionRC I really like their stuff, it works as advertised without alot of mucking around I have a lawmate setup as well but I have really found ImmersionRC more reliable.
    My setup is as follows:
    Seawolf 690TVL Pixim Camera 12V
    ImmersionRC 2.4ghz 500mw transmitter
    ImmersionRC EZOSD (I had a OSD on my last plane which I loved but I was no the best choice for a wing because eveything plugs in vertically so its too thick for a wing, also I wanted Itelemetry for another failsafe.)

    I built this plane to be enclosed, protected and streamline. The rc reciever and vidoe transmitter are in each wing tip. I cut into the end up the wings and made it you you could take off the vertical stabilizers with screws to access them. This worked out much better than I hoped.

    The EZOSD power sensor also doubles as a great power conditioner. The only thing that isn't sorted out is the power for the camera. Right now I have it powered directly off the battery because the step up I use is on backorder. When I get that I will be able to fit the power in the center so when I add a flap it will be completely streamline.

    I used twisted wires on everything. To bring the controls from the tip of the wing where the receive, is to the center I used a section of parallel cable. These are awsome because they are completely shielded and compact for how many lines it has. I built out all 9 channels so i can ad other functionality in the future without building a whole new line.

    I kept power and control on one wing and video on the other so everything id separated and balanced. Also the power and video lines are separated on the video wing. this is one think I don't agree with for the ImmersionRC stuff they use this 5 plug ribbon cable that has the power right next to the video. I break it our into two twisted wires do the video and power can take separate paths.

    I built a holder for the camera so it can me removable if I want to replace it with a gopro.
    2200 mah batteries are big for the frame so to make them flush I cut completely through and reinforce the whole plane with a sheet of EPP foam. This makes it good, tough and ridged.

    Love to hear comments and suggestions. pics are below.
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    Last edited by marzvt; 22nd November 2011 at 09:37 AM.

  2. #2
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    My first suggestion would be that you really need to trim those push rods! Haha. Other than that, awesome! I'm surprised there haven't been more people all over this plane for fpv. My teksumo has just arrived and I'm waiting on one more order before I can start the build so it's really awesome to see a setup that has been proven and just to see other ways of doing everything. I love how tough this denser epp feels. Obviously the downside is that it's heavier but seeing as I'm stuck with it I might as well enjoy the added strength . It reminds me of those foam boards and rings etc at public pools. Really tough. The only problem I had was that if you built it stock the nose is going to be by far the weakest part of the plane. So I decided I'm going to be making a big thick middle section where I can burry everything and have little hatches and make everything nice and neat. No fly away wires . Another bonus for me is the added wing area, I'm wanting a fairly light wing loading. I really like your way of adding the foam underneath. I'd imagine it'd feel preetty strong. Here's a photo I took a few days ago just trying to imagine how it would look.

    Click image for larger version. 

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    Just if you're interested my setup I'm going with.. one 2200mah powers everything, LC filter to 500mw 1.2ghz with cloverleaf and a wdr750. Using just a HK simple osd. 40A plush and an rctimer BC2826 1400KV with an 8x3.8 or a 7x5. A 72mhz RP8D1 and I also bought two GA-250 MEMS gyros to stabilise the plane a bit. Should work great as long as they're not DOA . I plan to make the battery bay a bit bigger so I can play with different sized batteries like 2200+1300 or two 1300s or two 2200mah maybe. Motor should pull around 20A with the 8x3.8 so I hope that should be enough.
    Just a few questions about your setup... Do you know the auw? What prop are you using with that motor and do you know how many amps it's pulling at full throttle? Not sure how much experience you've had with different motor sizes but do you think my motor setup sounds adequate for pushing around a teksumo with added centre section and fpv gear? Also have you noticed any interference due to the carbon spars in the plane? My cloverleaf is going to have to be mounted directly ontop of the wing spar and being a circular polarized antenna the carbon shouldn't wreck too much havoc but I still don't like the idea. I'm planning on switching out all the wing spars to fibreglass just so it's one less thing I have to worry about. And finally do you have any videos?! I would love to see how it handles, especially with it so loaded up with batteries! Thanks for this thread! Really helpful.

    Cheers
    Isaac

  3. #3
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    Whats auw? I started with a 8X6 prop because on my last one with a 35-36 motor it was awsome. It didnt do a greatjob with the 35-30 motor though, it was only pulling 18amps and didnt have enough power. I switched to a 8X8 prop. That did the trick, now it is pulling 29amps with basically 1X1 thrust ratio.

    I started with a similar power setup. It was a good match for a single 2200mah battery. Desent power, topped out at about 55-60mph good climb. So that should be fine. It wasnt enough when I switched to a 2 battery setup though. Maybe if I had done 2 1550mahs it would have been better.
    http://www.youtube.com/watch?v=sdezPd6pRqI This video was made with a very similar setup to what are building. It was made before I went crazy with the big motor and 2x batteries.

  4. #4
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    Nice. I've got one on the way to goof around with and to get some wing flying experience before I upgrade to the Zephyr II. I can't see your pics though because they're in another protected forum. I won't be using an autopilot or stabilizer.

  5. #5
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    Crap, I'll redo the pics

  6. #6
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    Pictures have been updated.

  7. #7
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    Isaac how wide is the "blunt section"?

  8. #8
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    Can you post a like to the outrunner you using?
    [SIZE=1][B]FPV killed my bank account[/B]
    [/SIZE]

  9. #9
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    Quote Originally Posted by msev View Post
    Isaac how wide is the "blunt section"?
    I am about to stick this 7'' EPP blunt section on my Swift 2. Should be pretty sweet. 39'' total.
    Attached Thumbnails Attached Thumbnails Click image for larger version. 

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    [COLOR=red]FPV is not a crime![/COLOR]

    executiveprinters.com
    printingplusfl.com

  10. #10
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    NTM Prop Drive Series 35-30A 1400kv with an 8X8 prop. itspulling about 29 amps.

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