prop for 1/4 shaft in 55mm?

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  • nomedmon
    rock hunter
    • Jun 2007
    • 26
    #1

    prop for 1/4 shaft in 55mm?

    hey all got sick of gas motor got a auqacraft T 20 to put in my 46 in mono .was running 70mm for gas 30cc .i hear to run the 10s batts i need to go down into 50mms to get started cant find any in 1/4 shaft ---any advice is welcome this is my first large scale conv so a little lost -- thanks
    Tags: None
    • RCKong
      Fast Electric Addict!
      • Sep 2009
      • 1556
      #2
      you might want to use a 1/4 shaft with a 3/16 end on it. you can use smaller props for it that way.

        Comment

        • nomedmon
          rock hunter
          • Jun 2007
          • 26
          #3
          i was thinking that but just want to use whats at hand and this shaft is boss cant hurt it but may have to go and $$$$$
          i just need a starting point on the mm for a 730kv motor on 10s boat is heavy 22 lbs with gas motor--- warehouse hobbies enforcer ss now owned by bonzi boats

            Comment

            • dasboata
              Fast Electric Addict!
              • Dec 2010
              • 3152
              #4
              Hi I have the shafts and the props drop me a e mail if interested I have a 5517/4 in SS 1/4" I will sell to you for $70 shipped USA thanks Chris dasboata@aol.com

                Comment

                • Fluid
                  Fast and Furious
                  • Apr 2007
                  • 7990
                  #5
                  Chris, I think that four-bladed prop will be too much for that motor on 10S in the big heavy boat. Too much blade area and too much pitch. That motor is not known for its robustness. I think the OP should go with the step-down 1/4" shaft, lots more prop options.


                  .


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                    • dasboata
                      Fast Electric Addict!
                      • Dec 2010
                      • 3152
                      #6
                      I am a nitro and gas guy that is where my expertise lie for prop picking. I rely on you electric guys and Jay .to help me with that. I do have other 1/4 shaft small Prop shops in stock thanks chris

                        Comment

                        • Doug Smock
                          Moderator
                          • Apr 2007
                          • 5264
                          #7
                          If you do decide to go with the step-down shaft consider using a 1/4" drive dog.
                          MODEL BOAT RACER
                          IMPBA President
                          District 13 Director 2011- present
                          IMPBA National Records Director 2009-2019
                          IMPBA 19887L CD
                          NAMBA 1169

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                            • photohoward1
                              Fast Electric Addict!
                              • Mar 2009
                              • 1629
                              #8
                              Use a drop down shaft. Shaft is cheaper than a Motor and Speedo!

                                Comment

                                • nomedmon
                                  rock hunter
                                  • Jun 2007
                                  • 26
                                  #9
                                  ill have to wait abit a friend is a machinest said he could cut down my shaft to the 3/16 and thread it have to wait till end of may nuts
                                  its warehouse hobbies enforcer with the sp 2 drive line set up will be callin them to see if they have other ends for my needs.

                                    Comment

                                    • rscheffer
                                      Member
                                      • Aug 2011
                                      • 74
                                      #10
                                      Get your self a 3/16 andshaft and you will have al the prop choice you will need .
                                      As for 1/4 this is the only one i know who has them (i run them too is a stainless copy of the graupner k series)
                                      But stock is very variable . And at the moment 0. But he has 50/55and61 mm low pitch stainless.
                                      Verry though and there for harder to balance and polish but once done they are ther for life ,,, unles you drop it to the botom of your pond
                                      http://mbp-rc.de/Rohlinge


                                      Ramon

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