Pro Boat Formula Fastech Jet Drive Project

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  • calcagno45
    Fast Electric Addict!
    • Mar 2008
    • 1006

    #91
    Progress!!!!!!

    and then back to

    Glad to see this one not sold Danny!!
    My prop hasn't been wet in a while.

    Comment

    • sundog
      Platinum Card Member
      • Feb 2009
      • 878

      #92
      Ooops, wrong drive?

      Diego, I think you might have chosen the wrong drive for that boat. The intake is still too far forward and will cavitate under high speed. Like Viking said earlier, you want the intake as close to the transom (and as narrow) as possible. The Graupner 2347 (29mm) would have been the correct drive for this 27" boat I believe. http://www.cornwallmodelboats.co.uk/...upner_jet.htmlIf you want a 40mm, then the Kehrer 40 (black unit) would have been most suitable. Graupner makes a larger (49mm) with the short intake (Model 2347) and it is a monster, but too much for this project (my opinion). I''ll stay posted, as I'm planning a similar build with the Kehrer unit. http://www.jet-drive.de/cms/componen...,11/Itemid,17/

      Did you and Dirtysouth both build the jet drive riggers? Saw the video, toocool. I did the NQD surface drive rigger mod with 4m flex hardware http://www.rcuniverse.com/forum/m_85...tm.htm#8506113 but it's been too cold to try it out. Soon, though!
      Last edited by sundog; 03-09-2009, 12:03 PM. Reason: added link
      Legend 36 sailboat, KMB Powerjet Ed Hardy Viper, ABC jet pwrd BBY Oval Master, ABC Hobby Jetski, NQD Tear Into's, HK Discovery 500, MickieBeez pwrd Jet Rigger!, Davette/Gravtix jet sprint, KMB Powerjet Pursuit, NQD pwrd Jet Catamaran!,Steam pwrd African Queen, Sidewinder airboat, Graupner Eco Power

      Comment

      • Diegoboy
        Administrator
        • Mar 2007
        • 7244

        #93
        Originally posted by sundog
        Diego, I think you might have chosen the wrong drive for that boat. The intake is still too far forward and will cavitate under high speed. Like Viking said earlier, you want the intake as close to the transom (and as narrow) as possible. The Graupner 2347 (29mm) would have been the correct drive for this 27" boat I believe. http://www.cornwallmodelboats.co.uk/...upner_jet.htmlIf you want a 40mm, then the Kehrer 40 (black unit) would have been most suitable. Graupner makes a larger (49mm) with the short intake (Model 2347) and it is a monster, but too much for this project (my opinion). I''ll stay posted, as I'm planning a similar build with the Kehrer unit. http://www.jet-drive.de/cms/componen...,11/Itemid,17/
        That's it...! any more naysayers out there? Fine, I'll abandon the darn project since it will never work and when I get home I'll go Dirtysouth31 / SJFE on this boat & stomp it to pieces. I guess I should have asked all the darn naysayers for permission before I even started because now it won't even work! Oh well, It's just money down the crapper.
        I guess it's easier to say "that @!#$% ain't gonna work" than it is to say "you may want to try this (insert suggestion here) since you already started down that path."

        Originally posted by sundog
        Did you and Dirtysouth both build the jet drive riggers? Saw the video, toocool. I did the NQD surface drive rigger mod with 4m flex hardware http://www.rcuniverse.com/forum/m_85...tm.htm#8506113 but it's been too cold to try it out. Soon, though!
        Ya that was us. Dirty could have used a bit of finesse instead of brute force installing the jet to make it perform better. He had the impeller making contact with the suction tube wall, so rather than adjusting, he filed down the impeller.
        "A quick temper will make a fool of you soon enough."
        . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .Bruce Lee. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

        Comment

        • calcagno45
          Fast Electric Addict!
          • Mar 2008
          • 1006

          #94
          Originally posted by Diegoboy
          That's it...! any more naysayers out there? Fine, I'll abandon the darn project since it will never work and when I get home I'll go Dirtysouth31 / SJFE on this boat & stomp it to pieces. I guess I should have asked all the darn naysayers for permission before I even started because now it won't even work! Oh well, It's just money down the crapper.
          I guess it's easier to say "that @!#$% ain't gonna work" than it is to say "you may want to try this (insert suggestion here) since you already started down that path."
          NO!! Don't get discouraged now!! I have high hopes for this one! And wouldn't mind buying it if Doby doesnt lol....
          My prop hasn't been wet in a while.

          Comment

          • sundog
            Platinum Card Member
            • Feb 2009
            • 878

            #95
            Sorry

            Sorry about that Diego, I can see I should have used more finesse here. That boat should work fine up to a point. But as you apply more power (in the mod-v hull design), the waterline creeps back towards the transom until at some point it will pick up air. I didn't mean to unmotivate or diss you, I was just sharing knowledge. My apologies, Sdg.
            Legend 36 sailboat, KMB Powerjet Ed Hardy Viper, ABC jet pwrd BBY Oval Master, ABC Hobby Jetski, NQD Tear Into's, HK Discovery 500, MickieBeez pwrd Jet Rigger!, Davette/Gravtix jet sprint, KMB Powerjet Pursuit, NQD pwrd Jet Catamaran!,Steam pwrd African Queen, Sidewinder airboat, Graupner Eco Power

            Comment

            • Diegoboy
              Administrator
              • Mar 2007
              • 7244

              #96
              Don't worry. This project will be completed. I was just kidding. I'm just getting tired of all the "it won't work"; "You did it wrong"; Stop wasting your time" type comments. I love some criticism, as long as it's constructive. The video of her run will speak for itself.


              The motor is mounted and installed. I just need to get her ESC from Meniscus, so she can get wet!
              "A quick temper will make a fool of you soon enough."
              . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .Bruce Lee. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

              Comment

              • Meniscus
                Refuse the box exists!
                • Jul 2008
                • 3225

                #97
                I think it won't work!

                Inserting suggestion here => try flipping it over and reversing the drive

                LMAO!!! really J/K though...

                A little 'injury to insult'! > yes I got the order right
                IMPBA: 7-Time FE World Record Holder "Don't think outside the box. Rather, refuse to admit that the box exists in the first place!"

                MGM Controllers - Giant Power Lipos - ML Boatworks - Wholt's Wire Drives & Struts - Nano-Oil

                Comment

                • Diegoboy
                  Administrator
                  • Mar 2007
                  • 7244

                  #98
                  I can always count on you Meniscus, for... well, I can always count on you.
                  No hard feelings Sundog. Welcome to OSE! I'm glad you took time away from RCU to check us out!
                  "A quick temper will make a fool of you soon enough."
                  . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .Bruce Lee. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

                  Comment

                  • sundog
                    Platinum Card Member
                    • Feb 2009
                    • 878

                    #99
                    Yeah, I know what you mean - I've recently experienced some (foks with no imagination) cut my (crazy) ideas down (in an attemp to build themselves up?) Hmmm. But I assure you that wasn't my intention here. I can see this is a touchy subject with you and so I don't mind stepping away... my apologies .:
                    Legend 36 sailboat, KMB Powerjet Ed Hardy Viper, ABC jet pwrd BBY Oval Master, ABC Hobby Jetski, NQD Tear Into's, HK Discovery 500, MickieBeez pwrd Jet Rigger!, Davette/Gravtix jet sprint, KMB Powerjet Pursuit, NQD pwrd Jet Catamaran!,Steam pwrd African Queen, Sidewinder airboat, Graupner Eco Power

                    Comment

                    • Diegoboy
                      Administrator
                      • Mar 2007
                      • 7244

                      #100
                      Please don't step away. This darn boat has been fighting me every step of the way. Your input is appreciated, really! I just can't undo what I've already done.
                      "A quick temper will make a fool of you soon enough."
                      . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .Bruce Lee. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

                      Comment

                      • Doby
                        KANADA RULES!
                        • Apr 2007
                        • 7280

                        #101
                        Diego, I think you installed the jet drive on the deck and it won't work that way. What were you thinking?????

                        I'll probably still buy it though.
                        Grand River Marine Modellers
                        https://www.facebook.com/search/top/...ne%20modellers

                        Comment

                        • Diegoboy
                          Administrator
                          • Mar 2007
                          • 7244

                          #102
                          I have no idea what I was thinking. I am still waiting on Meniscus and the ESC...
                          "A quick temper will make a fool of you soon enough."
                          . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .Bruce Lee. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

                          Comment

                          • Diegoboy
                            Administrator
                            • Mar 2007
                            • 7244

                            #103
                            Que the chirping crickets...
                            "A quick temper will make a fool of you soon enough."
                            . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .Bruce Lee. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

                            Comment

                            • egneg
                              Fast Electric Addict!
                              • Feb 2008
                              • 4670

                              #104
                              Originally posted by Diegoboy
                              I am still waiting on Meniscus and the ESC...
                              Diego I will hold the props until he delivers!
                              IMPBA 20481S D-12

                              Comment

                              • Viking
                                Senior Member
                                • Jul 2008
                                • 133

                                #105
                                Das Boot

                                Hi Diego;
                                I got my boat in the water the other day and it wouldn't run on 2s. Ran in the air ok but wouldn't start in the water!?
                                I had a 3s with me and tried that---- too much power !! It spun out with the smallest rudder input ----- Hmmm ----- perhaps a turn fin or two.
                                What do you think???
                                Viking
                                That Viking www.How2RC.com PULSO
                                Home made 36" DeepVee 50mph

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