how to make a cowl?

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  • Bande1
    Senior Member
    • Mar 2023
    • 684
    #1

    how to make a cowl?

    I got a project going that currently has no cowl. What do people do to make them? I had a last minute idea to lay tape over the opening and then a layer of wax paper. With a tennis ball over the motor. Its currently curing and I have my doubts about it.

    currently

    IMG_20230622_124623.jpg

    before I started

    IMG_20230621_161403.jpg
    Tags: None
    • Peter A
      Fast Electric Addict!
      • Sep 2012
      • 1486
      #2
      Looks like an Aeromarine sprintcat. What length is it, 42"? You should be able to find a cowl for it.
      NZMPBA 2013, 2016 Open Electric Champion. NZMPBA 2016 P Offshore Champion.
      2016 SUHA Q Sport Hydro Hi Points Champion.
      BOPMPBC Open Mono, Open Electric Champion.

        Comment

        • Bande1
          Senior Member
          • Mar 2023
          • 684
          #3
          Originally posted by Peter A
          Looks like an Aeromarine sprintcat. What length is it, 42"? You should be able to find a cowl for it.

          yes a 42"


          dont laugh

          IMG_20230622_142229.jpg

          I just need to seal the boat for now until I find one ok. LMAO

          IMG_20230622_152528.jpg

            Comment

            • Peter A
              Fast Electric Addict!
              • Sep 2012
              • 1486
              #4
              Why not make one from some 1/8"ply, just build a '?ockpit' over the motor then a light layer of glass to strengthen and seal the wood.

              You could put an ask in the buy, sell, swap page for a cowl. I'm sure someone will have one sitting around.

              This was my one I had a couple of years back. Castle 2028, Swordfish 300, ran it 10s 2p, would beat the gassers.

              20200806_170717.jpg20200806_170722.jpg20200806_171536.jpg20200806_171522.jpg
              NZMPBA 2013, 2016 Open Electric Champion. NZMPBA 2016 P Offshore Champion.
              2016 SUHA Q Sport Hydro Hi Points Champion.
              BOPMPBC Open Mono, Open Electric Champion.

                Comment

                • Peter A
                  Fast Electric Addict!
                  • Sep 2012
                  • 1486
                  #5
                  And it's ultimate demise

                  20210613_140111.jpg20210613_140121.jpg20210613_140125.jpg

                  Got run over by a gas sport hydro, was on me, I flipped the boat at the start and landed right in front of him.
                  NZMPBA 2013, 2016 Open Electric Champion. NZMPBA 2016 P Offshore Champion.
                  2016 SUHA Q Sport Hydro Hi Points Champion.
                  BOPMPBC Open Mono, Open Electric Champion.

                    Comment

                    • Bande1
                      Senior Member
                      • Mar 2023
                      • 684
                      #6
                      what size props did you run? Im just doing 6s @ 1480kv for now. its a project.


                      And it's ultimate demise
                      This one was almost that bad.....thats why Im not trying to make it fast. Shes seen better days.

                        Comment

                        • Peter A
                          Fast Electric Addict!
                          • Sep 2012
                          • 1486
                          #7
                          I was running x452/3 from memory. With your set up I would suggest 447 as a start.
                          NZMPBA 2013, 2016 Open Electric Champion. NZMPBA 2016 P Offshore Champion.
                          2016 SUHA Q Sport Hydro Hi Points Champion.
                          BOPMPBC Open Mono, Open Electric Champion.

                            Comment

                            • Bande1
                              Senior Member
                              • Mar 2023
                              • 684
                              #8
                              thats a relief I figured it needed 60mm+ or something. Jesse J who sold me the motor said he was making a cowl for me from his SprintCat. That's why I havent made a wanted thread.
                              Last edited by Bande1; 06-22-2023, 04:47 PM.

                                Comment

                                • Bande1
                                  Senior Member
                                  • Mar 2023
                                  • 684
                                  #9
                                  got the scoop done

                                  IMG_20230624_172314.jpg

                                  IMG_20230624_172303.jpg

                                  IMG_20230624_172253.jpg

                                  I realize now how stupid it was to make the motor scoop while making the main body. Shoulda removed the motor, made a flat piece then cut a hole in it for a cowl thats made separately. I have flipped the main body of the hatch so that the edges go downward. then I placed the new scoop on the upside down main hatch. With neoprene glued around the boats hatch recess the whole thing sits fairly level with the body making taping easier.

                                    Comment

                                    • Bande1
                                      Senior Member
                                      • Mar 2023
                                      • 684
                                      #10
                                      and now on the boat. it fits enough that I think it will seal. At least for a shakedown run tomorrow.

                                      IMG_20230624_195518 (1).jpg

                                      IMG_20230624_195533 (1).jpg

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