Sorry, but I gotta ask it...

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  • NitroVal
    Senior Member
    • Jun 2009
    • 423

    #1

    Sorry, but I gotta ask it...

    Im sure its been asked a million times, but what is the upper RPM limit a Neu/Fiegao motor will take. Lets say a 540, 60ish mm length can with a 442 prop on it.
    The RTR Nightmare- Electric King of Shaves
    Now with 540s- 62mph
    New setup- Etti 150A's, Turnigy 2600s, 5S, X442s and a whole lot of cooling hoses
  • domwilson
    Moderator
    • Apr 2007
    • 4408

    #2
    A Feigao has 50k bearings and a Neu are 60k bearings. But you don't want to go near those RPM's on either if you want longevity.
    Government Moto:
    "Why fix it? Blame someone else for breaking it."

    Comment

    • ozzie-crawl
      Fast Electric Addict!
      • Sep 2008
      • 2865

      #3
      i think the upper rpm limits given for the bearings would only be used in a reduction gear system

      Comment

      • NitroVal
        Senior Member
        • Jun 2009
        • 423

        #4
        Yea, I know they have an RPM limit on the bearings, but that doesnt necessarily mean the windings or internals will stay together at that RPM, would they?
        The RTR Nightmare- Electric King of Shaves
        Now with 540s- 62mph
        New setup- Etti 150A's, Turnigy 2600s, 5S, X442s and a whole lot of cooling hoses

        Comment

        • Fluid
          Fast and Furious
          • Apr 2007
          • 8012

          #5
          The windings don't move so they fail by excess heat or scraped lacquer. Some magnets are cracked or not properly glued and will come apart long before 50,000 rpm. I have wound-out Fiegaos into the mid-45,000 rpm range under load, but I have seen others spit magnets at far fewer rpm. Because build quality varies, there is no real answer.



          .
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          Comment

          • BakedMopar
            No Mo Slipah
            • Sep 2009
            • 1679

            #6
            I have had my feigao 12l at a little over 51000 rpm. I would not recommend it. I currently run my 380 8l on 3s so it's spinning above 43000rpm.
            If all of your wishes are granted, many of your dreams will be destroyed!

            Comment

            • FloatDaBoat
              Bare Bones Fabricator
              • Sep 2009
              • 368

              #7
              Originally posted by BakedMopar
              I have had my feigao 12l at a little over 51000 rpm. I would not recommend it. I currently run my 380 8l on 3s so it's spinning above 43000rpm.
              Are those RPM figures based on motor KV ratings, or did you log them during actual runs?

              Comment

              • BakedMopar
                No Mo Slipah
                • Sep 2009
                • 1679

                #8
                Those were logged. 12l was on 6s.
                If all of your wishes are granted, many of your dreams will be destroyed!

                Comment

                • hide
                  Senior Member
                  • Dec 2008
                  • 188

                  #9
                  Nic Case ran a Neu 1521 1Y at over 100k rpm in his speed car to run 161mph, that said I'm sure it will only last a few runs.

                  Comment

                  • Tuslow1
                    Senior Member
                    • Apr 2007
                    • 154

                    #10
                    100,000 rpm, can you say high energy compact BOMB!!!
                    OK, You Go First!!!

                    Comment

                    • Simon.O.
                      Fast Electric Addict!
                      • Oct 2007
                      • 1521

                      #11
                      I have done a few or more passes, on different days, with a 540-7S on 3S to a 432 for a good mid 40krpm. I do not reccomend it if you want to use the motor next week.
                      It did work for me to pull over 100kmph (Police radar) with my smaller 26"rigger
                      See it....find the photos.....sketch it it....build it........with wood

                      Comment

                      • hide
                        Senior Member
                        • Dec 2008
                        • 188

                        #12
                        Originally posted by Tuslow1
                        100,000 rpm, can you say high energy compact BOMB!!!
                        I think the trick was that he geared the motor so highly that it never reached that. Although mathematically it should go over 100k he used a 3 speed gearbox to keep the revs down. Not too sure if he succeeded as I haven't seen him use the motor again

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