32" Pursuit with CC1515 on 4S2P

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  • GP73
    Senior Member
    • Jul 2010
    • 544
    #1

    32" Pursuit with CC1515 on 4S2P

    Hi guys,

    Here's a run from earlier today with my Pursuit on 4S2P, Castle/Neu 1515 2200Kv, Turnigy 180 and Prather 230.

    Sorry about the quality but it was taken with a cell phone by a guy passing by, at the end of the video there is a nice flip, if you can see it...



    The top speed on the GPS was 49.9 MPH with spikes of 180 amps (but I think it was actually more than that) and I melted the heatshrink around the etree logger.

    Even with the extra weight of the two 4S 5000mah packs the boats keeps jumping in and out of the water, any suggestion about how to fix that is most welcomed!

    But I think it's just too much power for it...

    I'll post the etree logs later.
    Tags: None
    • Jeff Wohlt
      Fast Electric Addict!
      • Jan 2008
      • 2716
      #2
      Drop your prop pitch but stay with same dia or close.
      www.rcraceboat.com

      [email protected]

        Comment

        • GP73
          Senior Member
          • Jul 2010
          • 544
          #3
          Thanks Jeff, I've tried an X642 after that, lost some speed but the hopping was still there, I don't think it can be called porpoising since the boat jumps out instead of bouncing up and down?

          I'm sure my setup is wrong, the cg was at 10" from the transom, I'll try to reset everything to neutral and go again maybe tomorrow. She definitely likes the extra weight of the batteries.

          The trim tabs and strut should be level with the keel, right?

          Too bad the video quality is super crappy, it was a nice run!

          Here is the aftermath on the logger heatshrink and the graphs.


          EDIT: LOL, I read that backward... I'll drop the pitch and try to keep the diameter, I'll try a X448 next time. How about X450/3?

          Originally posted by Jeff Wohlt
          Drop your prop pitch but stay with same dia or close.
          Attached Files
          Last edited by GP73; 06-04-2011, 10:26 PM.

            Comment

            • GP73
              Senior Member
              • Jul 2010
              • 544
              #4
              Another video from today with an Octura X448 and a... finger...



              Liiiiipooooo where art thou? I need good videos!!!!

                Comment

                • Doby
                  KANADA RULES!
                  • Apr 2007
                  • 7280
                  #5
                  Nice finger.
                  Grand River Marine Modellers
                  https://www.facebook.com/search/top/...ne%20modellers

                    Comment

                    • Jacked1
                      Senior Member
                      • Jun 2010
                      • 772
                      #6
                      Where is your cog? It might be too far forward?
                      Last edited by Jacked1; 06-06-2011, 10:59 AM.
                      Fleet: 55" Quad inline T600 Cigarette boat, Twin Mean Machine, Twin T600 47" mystery mono, 4082 Surge Crusher, 1717 8s Genesis, 4074 Villain, "mini mono", 52" Bonzi, Prather Funcruiser, 2 DPI 3.5cc tunnels, 5' Styrofoam recover barge

                        Comment

                        • LiPo Power
                          DJI Drone Advanced Pilot
                          • May 2009
                          • 3186
                          #7
                          Thanks for letting me know you went to the pond! TWICE!!!
                          No call, no video!




                          Originally posted by GP73
                          Another video from today with an Octura X448 and a... finger...



                          Liiiiipooooo where art thou? I need good videos!!!!

                          DJI Drone Advanced Pilot
                          Canada

                            Comment

                            • GP73
                              Senior Member
                              • Jul 2010
                              • 544
                              #8
                              I tried from 9" to 11" from the transom, if I put it forward it's a little better.

                              Originally posted by Jacked1
                              Where is your cog? It might be too far forward?

                                Comment

                                • GP73
                                  Senior Member
                                  • Jul 2010
                                  • 544
                                  #9
                                  Dude, I haven't heard anything from you I thought you were busy or went to Cambridge.

                                  I'll call you next time.




                                  Originally posted by LiPo Power
                                  Thanks for letting me know you went to the pond! TWICE!!!
                                  No call, no video!

                                    Comment

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