32" hotr 90+mph

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  • TotalPackage
    Banned
    • Jul 2010
    • 601

    #481
    so howard whats next?

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    • Howard Lee
      Senior Member
      • Nov 2010
      • 198

      #482
      My corvette has all the bolt ons and is very fast i got to 183 and it was still pulling.

      Back to drive shafts if want to get technical about it. It comes down to torque and hp. The longer the drive shaft the more torque will be lost. As the load increases the clearance between the shaft and the tubing will change. If your shaft has a slightly tight fit it will only get tighter as the load increases. When there is a bend in a shaft it will also cause some power difference. There is more resistance at the bend. I think its good to talk about things like this and let guys look at things from a different direction.

      Has anyone run a 1527 1.5D on 10s? But mike. My motor mount is built and shipped. I will be setting up the new 32 and was wondering what S to go with.

      Comment

      • Howard Lee
        Senior Member
        • Nov 2010
        • 198

        #483
        Originally posted by TotalPackage
        so howard whats next?
        About 125mph!! lol

        Comment

        • Jeff Wohlt
          Fast Electric Addict!
          • Jan 2008
          • 2716

          #484
          If you have the spacing correct at the strut a wire will actually push its way clear of the bend and lessen the resistance. That is why I use one bend closer to the motor. Also, are you running a thrust bearing at the coupler?
          www.rcraceboat.com

          [email protected]

          Comment

          • Jeff Wohlt
            Fast Electric Addict!
            • Jan 2008
            • 2716

            #485
            Ben, I would make sure you can hold it at the stub first. Also has to be very true...perfectly drilled and find the sweet spot before it locks down...you can mark (stub and wire) them and then solder if that is what you are using.
            www.rcraceboat.com

            [email protected]

            Comment

            • FighterCat57
              "The" Fighter Cat
              • Apr 2010
              • 3480

              #486
              Originally posted by Jeff Wohlt
              Ben, I would make sure you can hold it at the stub first. Also has to be very true...perfectly drilled and find the sweet spot before it locks down...you can mark (stub and wire) them and then solder if that is what you are using.
              I have one of your wires here to try first.
              FighterCatRacing Team CHING BLING - Ching Bling. Brilliant, Advanced Sparkle for your hull.

              Comment

              • TotalPackage
                Banned
                • Jul 2010
                • 601

                #487
                Originally posted by Howard Lee
                About 125mph!! lol
                Im not lauging coz I know you can do it! I will be nice to see some 100 mile an hour cats on ose

                Comment

                • Howard Lee
                  Senior Member
                  • Nov 2010
                  • 198

                  #488
                  Originally posted by TotalPackage
                  Im not lauging coz I know you can do it! I will be nice to see some 100 mile an hour cats on ose
                  How about mike? He is kicking a$$ with them leo's, good for him.

                  Comment

                  • TotalPackage
                    Banned
                    • Jul 2010
                    • 601

                    #489
                    Originally posted by Howard Lee
                    How about mike? He is kicking a$$ with them leo's, good for him.
                    Yes I told him he might as well follow your lead and go hv. Im worried he may burn up some caps running 7 s on the t180's .Maybe not. The fets can handle it but who knows about the rest of the esc?

                    I cant wait to see you get your hands on a 40 inch hull and twins .Those Leos are really shaking things up here on ose.

                    Comment

                    • 6sHyper
                      <<<Surfs up!
                      • Jan 2011
                      • 597

                      #490
                      Originally posted by FighterCat57
                      Cool. Think I'll try it. 10s 1520/1600 078 wire.
                      keep me posted on that!!!

                      Comment

                      • ray schrauwen
                        Fast Electric Addict!
                        • Apr 2007
                        • 9472

                        #491
                        Originally posted by TotalPackage
                        The fets can handle it but who knows about the rest of the esc?
                        How do you know? Do you have a part number of the FETs? I would like to know the number to see it's rating personally, thanks!
                        Nortavlag Bulc

                        Comment

                        • TotalPackage
                          Banned
                          • Jul 2010
                          • 601

                          #492
                          Originally posted by ray schrauwen
                          How do you know? Do you have a part number of the FETs? I would like to know the number to see it's rating personally, thanks!
                          all esc desingners use fets higher than their expected load if you want to know the number simply open yours up and SEE for yourself . Do you think theyd engineer them to run at 100 percent of what they can do ? NO it doesnt work that way. For example my turnigy hv 80 had fet that could handle 65 volts over 15 s lipo but it is rated for 12 s. That should be quite simple to understand. Most have high voltage govenors implimented in the firmware in case of some unforeseen spike in the voltage that could damage the fets. The escs are usually not limited by their fet rating but more by the RC circuits rise and fall time pushing the fet drivers. At high voltage/rpm this time get shorter until there not enough dead time and the fets fire against one another and bam you have a short

                          I have a museum of failed and opened esc's so if you want to see one send me shipping and ill send you one to LOOK at for yourself


                          "how do you know?" cause I read technical literature on bldc controllers daily.The rest is just common sense

                          Comment

                          • Rumdog
                            Fast Electric Addict!
                            • Mar 2009
                            • 6453

                            #493
                            Originally posted by TotalPackage
                            all esc desingners use fets higher than their expected load if you want to know the number simply open yours up and SEE for yourself . Do you think theyd engineer them to run at 100 percent of what they can do ? NO it doesnt work that way. For example my turnigy hv 80 had fet that could handle 65 volts over 15 s lipo but it is rated for 12 s. That should be quite simple to understand. Most have high voltage govenors implimented in the firmware in case of some unforeseen spike in the voltage that could damage the fets. The escs are usually not limited by their fet rating but more by the RC circuits rise and fall time pushing the fet drivers. At high voltage/rpm this time get shorter until there not enough dead time and the fets fire against one another and bam you have a short

                            I have a museum of failed and opened esc's so if you want to see one send me shipping and ill send you one to LOOK at for yourself


                            "how do you know?" cause I read technical literature on bldc controllers daily.The rest is just common sense


                            Comment

                            • Diegoboy
                              Administrator
                              • Mar 2007
                              • 7244

                              #494
                              Is this thread done? It MUST be getting close....
                              "A quick temper will make a fool of you soon enough."
                              . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .Bruce Lee. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

                              Comment

                              • TotalPackage
                                Banned
                                • Jul 2010
                                • 601

                                #495
                                I guess so as it is going un technical Ray your answer is here I dont know about the other stuff. horrible music though lol. I dont listen to that garbage lol.No need to kill the thread as it's Howards and all my comments are directed toward him. Ray asked a question so I gave him the technical answer end of story.You are on your own diego weeding through all the other spam. Videos should be posted off topic. Along with anything else thats not a part of howards thread "a 90+mph hotr" .
                                Last edited by TotalPackage; 04-18-2011, 10:20 PM.

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