Roban - World Class Scale Helicopters

Official Nexa 1860mm PA-38 Tomahawk ARF Thread

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  • waterboy007
    Member
    • May 2024
    • 3
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    #21
    Just completed my Tomahawk, fitted with a pair of 35” VMAR floats. I may have to wait until the spring for maiden flight (Canadian winter). This is an electric setup with an E-flite Power 60 brushless motor, 15x8 prop, 80Amp ESC. RTF weight is 10lbs 4oz (4.73Kg).

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    • Shempy
      Member
      • Jan 2025
      • 5
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      #22
      Is a rcgf rear exhaust 15 too large

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      • Shempy
        Member
        • Jan 2025
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        #23
        Two large of an engine will it Mount properly

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        • CF-105
          Arrowhead

          • Aug 2019
          • 140
          • Atlantic Canada
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          #24
          Maidened my Traumahawk today!

          Finished it up over the winter. Recovered as the full scale I solo’ed in back in the 80’s. The elevator setup was modified: I joined the two pieces with a “U” shaped piece of music wire. Rather than mounting servos in the tail, I used a single servo in the cockpit area. Flexible rod connects it to a bellcrank under the horizontal stab. A pushrod connects that to the elevator horn.

          Power is an E-Flite Power 60B; I forget what I used for a prop. Might be a 16x8? At any rate it’s scale size for the model. Used a 6S 4000mah battery. Nothing larger would fit without cutting into things.

          The flight went extremely well. The nail-biting happened during the takeoff. It required a surprising amount of runway to get airborne. In fact I was just about to abort when she finally broke ground. It’s a grass field, and quite soft at the moment. It needed very little trim - a bit of right aileron & some down elevator. Deploying flaps caused very little if any pitch change. Landing was with one notch of flap

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          • Creative RC
            Member

            • Sep 2018
            • 16
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            #25
            A couple more photos of CF105's Plane.
            Attached Files

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            • CF-105
              Arrowhead

              • Aug 2019
              • 140
              • Atlantic Canada
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              #26
              Thanks, Creative!

              Unfortunately she went in on flight #2. After turning final to land, I got a bit too low and a bit too slow, and got caught in some ground-induced turbulence. Certainly repairable, mostly popped glue joints and a wing tube that would be at home in a Corsair. Some breakage though. Recovery was risky - there was a flock of Canada Geese (aka Cobra Chickens) resting in the field between me and it. Thankfully they flew off as I approached (doubly thankfully they didn’t fly overhead).

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              • Browneye77
                Heli Flyer
                • May 2024
                • 7
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                #27
                Thinking seriously about one of these for scale comp. Nice looking civilian aircraft. 👍
                electric of course.
                what is the deal with the servos? Cutouts the wrong size?
                Chris Brown
                Yakima WA USA

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                • paulhlee@Me.com
                  Member
                  • May 2023
                  • 7
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                  #28
                  Would an ePhil 20cc side exhaust motor fit in here or is that too big?

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                  • CF-105
                    Arrowhead

                    • Aug 2019
                    • 140
                    • Atlantic Canada
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                    #29
                    It should fit a 20cc fine.

                    browneye: I find servo cutouts are rarely if ever the right size, regardless of manufacturer. The exception may be Horizon stuff, if you use their Spektrum servos. Maybe.

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                    • victor.montalbo@gmail.com
                      Member
                      • Dec 2025
                      • 2
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                      #30
                      What is the largest size engine displacement two and four stroke nitro engine

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                      • victor.montalbo@gmail.com
                        Member
                        • Dec 2025
                        • 2
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                        #31
                        Engines for tomahawk?

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