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Monster mono

Discussion in 'Boat Build Projects' started by Tombsy, Feb 2, 2015.

  1. Tombsy

    Tombsy Boat Racing Fanatic
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    Nice hull, I'll look for some electric options but getting some speed on that size hull could be pretty pricey. Just the batteries would be close to your budget. The cheapest option I think would be if you'd consider going gas with it again.
    You can get a modified gas engine around $300 then hardware and the rest of the misc. Does it still have a radio box?
    Edit: I see the radio box in the pics
     
    #21 Tombsy, Apr 24, 2015
    Last edited: Apr 24, 2015
  2. RcLoveer

    RcLoveer New Member

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  3. Y2daT

    Y2daT Over Powered RC
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    awesome
    and Nice work
     
  4. Tombsy

    Tombsy Boat Racing Fanatic
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    Hobbyking is great I have 31 orders so far lol. If you run in series at 10s I think you should be looking for a motor around 600-700 kv, but still worried if a 200 amp esc is big enough.
    The Leopards are cheaper than the Castle and Neu's, the 640kv would work but your right at the upper voltage limit 36v.
    http://www.offshoreelectrics.com/proddetail.php?prod=leo-56110
    If you went 12s your amps would go down.
     
  5. RcLoveer

    RcLoveer New Member

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    Lol 31 orders thats alot yes it does not really matter if 12 or 10s but once all the electronics work together it will be great.


    Edit: will that motor be big enough to get the speed?
    and the esc i will look into getting a higher amperage
     
  6. RcLoveer

    RcLoveer New Member

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    Btw thanks for all your help so far!:):4modsmerc:
     
    #26 RcLoveer, Apr 25, 2015
    Last edited: Apr 25, 2015
  7. Tombsy

    Tombsy Boat Racing Fanatic
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    It depends on heavy the boat ends up being but the 640kv motor on 10s should get you into the 40's (mph) with decent runtime I think. Also depends on the prop, your going to have to start small and work up to your amp limit. The Octura X470/3 might be in the neighbourhood.
     
  8. RcLoveer

    RcLoveer New Member

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    alright if you want i can weigh the boat now to see the weight..
     
  9. Tombsy

    Tombsy Boat Racing Fanatic
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    Sure, might get an idea. Going to have to check if its watertight too, you can plug the holes in the transom with dowels and epoxy if you going to go with new hardware. You can shim the dowels with masking tape, glue them in and cut them flush after they dry. Then give it the bathtub test. :) Your hatch looks like it has air holes in it that you can patch up with some fiberglass to seal it up too.

    Edit: looking on the Bonzai site a new 60" hull is 9 lbs.
    http://www.bonzisports.com/boats/60-epic
     
  10. RcLoveer

    RcLoveer New Member

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    Im looking through options for the shafts if i get a 1/4 brass tube i get a 1/4" Shaft also?


    And yes its water tight before i got rid of all the old hardware i tested it.


    Gonna weigh now.
     
  11. RcLoveer

    RcLoveer New Member

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    The boat weighed roughly 10 lb's
     
  12. Tombsy

    Tombsy Boat Racing Fanatic
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    Here's a great link to shaft sizes, for 1/4" flex it's 11/32 with Teflon tube and it's 5/16" without Teflon. (I'm running Teflon in this mono but in my scale I don't.) You would be fine with 5/16 and no Teflon then you can add a grease fitting to help grease the shaft in the boat.
    Usually you would nest the next size bigger brass over the size you need and glue that in. That way if you ever have to change out the brass you don't have to re-glue it in. Make sense?

    http://www.offshoreelectrics.com/products.php?cat=Stuffing+tubes+and+related+parts.

    10 lbs? that doesn't seem bad I think you should be okay.
     
  13. RcLoveer

    RcLoveer New Member

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    Alright cool thanks mate the parts list now starting too look good....
     
  14. Tombsy

    Tombsy Boat Racing Fanatic
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    Finally got a bit of video from testing not the best quality I had to rip it from FB. I need bigger props! lol. With a Prather 255 I'm getting 56.5 mph on GPS but it's not pulling many amps and everything is coming back cool. So there is a lot more speed in it but I need better handling in the corners for racing. I think the turnfins might be too small so I'm trying that first and well see from there on some other adjustments to the strut and trim tabs.

    [​IMG]
     
  15. Tombsy

    Tombsy Boat Racing Fanatic
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    A little follow up on this boat, I finally tried my hand at moulding a cowl for this boat to go over the pexi hatch. I used a cowl mold from a smaller boat, some plexiglass, packing tape and a bunch of mold release then Kevlar and carbon fibre cloth. It turned out pretty well. Could have been better with gel-coat and a vacuum bag machine :).
    [​IMG][​IMG]


    Sent from my iPad using Tapatalk
     
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  16. Antho11

    Antho11 Studio Forums Elite
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    The cowl looks really cool, great job!
     
  17. Tombsy

    Tombsy Boat Racing Fanatic
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  18. Tombsy

    Tombsy Boat Racing Fanatic
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    Raced the mono on 10s in Edmonton and won all four heats against a couple nitro boats and nothing burned up lol.[​IMG][​IMG]


    Sent from my iPhone using Tapatalk
     
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  19. Antho11

    Antho11 Studio Forums Elite
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    I can only imagine the power on 10s! The gas monkey sticker is kind of ironic on an electric boat lol! Congrats on the wins!
     
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