TFL Hobbies "Popeye" Hydro: P-Sport Hydro

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  • tlandauer
    Fast Electric Addict!
    • Apr 2011
    • 5666

    #841
    Originally posted by Jlov
    Ok thx Slo. I'm going to try that. I work out of town a couple of days each week so in hotels a lot. I just checked in gonna look on Google Earth and find me a pond to go run in. I'll let you know if helped any. Thx Jeff
    Make sure there are no 'gators!
    Too many boats, not enough time...

    Comment

    • ron1950
      Fast Electric Addict!
      • Aug 2010
      • 3024

      #842
      you guys got me working again on the turn fin got it fixed lasdt night then the winds came lol
      MY RETIREMENT PLAN?????.....POWERBALL
      74 vintage kirby clasic hydro, pursuit mono, mg, 47'' mono, popeye hydro...

      Comment

      • Jlov
        Senior Member
        • Nov 2013
        • 825

        #843
        So something like this angle on the turn fin Slo? Did your CF Popeye come yet?
        Attached Files

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        • flraptor07
          Fast Electric Addict!
          • Aug 2013
          • 2451

          #844
          Originally posted by Jlov
          So something like this angle on the turn fin Slo? Did your CF Popeye come yet?
          That looks pretty good Jeff, give it a try.

          Comment

          • SloHD
            Slow Electric Addict!
            • Apr 2013
            • 337

            #845
            Originally posted by Jlov
            So something like this angle on the turn fin Slo? Did your CF Popeye come yet?
            To be honest it looks like a little too much, but I would try it out and see how it is. I should have my hull middle of next month. I already have all my equipment and hardware for the build though.

            Comment

            • ron1950
              Fast Electric Addict!
              • Aug 2010
              • 3024

              #846
              man you guys are putting way too much into this thing..if your turn fin is straight and the cg is anywhere near correct it will run stable even I have made mine work pretty well....if u put a much heavyer motor in the stock motor mount position then your cg will be way back of where it needs to be....then we all put a huge prop on it and it does wheelies on the prop cause the weight is way back .... I got the cg close to where it needs to be but still is a bit light in the nose....next fix would be to move the motor about 3 inches forward....
              MY RETIREMENT PLAN?????.....POWERBALL
              74 vintage kirby clasic hydro, pursuit mono, mg, 47'' mono, popeye hydro...

              Comment

              • tlandauer
                Fast Electric Addict!
                • Apr 2011
                • 5666

                #847
                I am by no means an expert, but I am convinced that the hops ( in a general sense) have alot to do with the speed the boat is traveling at and the angle of attack that is built-in on the sponson. The shape of the bottom, how the air goes thru, etc., etc. Also if two sponson ride pads ( AOA) are not unified, you will have rocking hops.
                I acquired a hydro with very pronounced AOA, with a UL-1 fin it rocked ( left-right-left) quite obviously, I tried a few different turn fins: Miss Vegas Deuce, Venom Miss Excite and the little TFL one, my observation was that when I had some nice chops on the water, the chops want to send BOTH sponsons up at the same time, but with the speed that the boat is traveling, the curved part of the fin is holding the starboard sponson down, so I see the portside gets tossed up. This got me thinking of making a straight fin myself, I used G-10 FG and cut one up, the problem was gone instantly.
                This may not be applicable to all situation, but with that specific hull and the modification that was done by the previous owner, it was the best solution which I found.
                DSCN1167_4689.jpg DSCN1172_4714.jpg DSCN1173_4715.jpg DSCN1178_4720.jpgDSCN1177_4719.jpg

                Doby, I don't mean to go off topic, but this has me perplexed for quite sometime, I said this to invite people with REAL knowledge to enlighten me, thanks for putting up with me here.
                Too many boats, not enough time...

                Comment

                • tlandauer
                  Fast Electric Addict!
                  • Apr 2011
                  • 5666

                  #848
                  Originally posted by ron1950
                  man you guys are putting way too much into this thing..if your turn fin is straight and the cg is anywhere near correct it will run stable even I have made mine work pretty well....if u put a much heavyer motor in the stock motor mount position then your cg will be way back of where it needs to be....then we all put a huge prop on it and it does wheelies on the prop cause the weight is way back .... I got the cg close to where it needs to be but still is a bit light in the nose....next fix would be to move the motor about 3 inches forward....
                  Ron, sorry, I know it is long winded and I agree with you, but I just want to have some educated opinion on that issue that I had.
                  Too many boats, not enough time...

                  Comment

                  • ron1950
                    Fast Electric Addict!
                    • Aug 2010
                    • 3024

                    #849
                    not a problem at all we all need to copy doby's boat and no problems
                    MY RETIREMENT PLAN?????.....POWERBALL
                    74 vintage kirby clasic hydro, pursuit mono, mg, 47'' mono, popeye hydro...

                    Comment

                    • Doby
                      KANADA RULES!
                      • Apr 2007
                      • 7280

                      #850
                      I just need to bet them back on the damn water..want to check out the mods I made over the winter.
                      Grand River Marine Modellers
                      https://www.facebook.com/search/top/...ne%20modellers

                      Comment

                      • Fluid
                        Fast and Furious
                        • Apr 2007
                        • 8012

                        #851
                        Guys, hooked turn fins just need to be set at the correct angle for the particular hull to eliminate hopping. This may take some experimentation, starting with the fin rotated 'too far back', then rotating it forward a little at a time until the hopping goes away. Go too far and it will begin again. This is really pretty basic tuning for 'most all curved fins, yet it seems to be kept a secret. I've found that what the fin angle "looks like" is often not what is actually required. It depends on the hull, the CG, the prop, the depth of the strut and the actual running aoa of the hull. It may be slightly different on two identical hulls. Sometimes rotating the fin less than one degree can make a big difference.

                        A couple club members were having this issue with their ML hydros running curved fins. They screwed around with strut depth, CG etc. but could not get the rocking/hopping to go away. I had told them to change the fin angle but "they knew better". Finally after weeks of wasted time they tried it, and the hopping was gone in both boats. There could be other causes like warped sponson bottoms, but if you're running a curved fin spend some quality time with your hydro rotating it until the hopping stops.


                        Or if you know better, then just ignore the above.
                        .
                        ERROR 403 - This is not the page you are looking for

                        Comment

                        • tlandauer
                          Fast Electric Addict!
                          • Apr 2011
                          • 5666

                          #852
                          Originally posted by Fluid
                          Guys, hooked turn fins just need to be set at the correct angle for the particular hull to eliminate hopping. This may take some experimentation, starting with the fin rotated 'too far back', then rotating it forward a little at a time until the hopping goes away. Go too far and it will begin again. This is really pretty basic tuning for 'most all curved fins, yet it seems to be kept a secret. I've found that what the fin angle "looks like" is often not what is actually required. It depends on the hull, the CG, the prop, the depth of the strut and the actual running aoa of the hull. It may be slightly different on two identical hulls. Sometimes rotating the fin less than one degree can make a big difference.

                          A couple club members were having this issue with their ML hydros running curved fins. They screwed around with strut depth, CG etc. but could not get the rocking/hopping to go away. I had told them to change the fin angle but "they knew better". Finally after weeks of wasted time they tried it, and the hopping was gone in both boats. There could be other causes like warped sponson bottoms, but if you're running a curved fin spend some quality time with your hydro rotating it until the hopping stops.


                          Or if you know better, then just ignore the above.
                          .
                          Thanks, Fluid, was hoping to get some advice from you!
                          Too many boats, not enough time...

                          Comment

                          • ron1950
                            Fast Electric Addict!
                            • Aug 2010
                            • 3024

                            #853
                            jay has forgot more then ill ever know ..thanks jay

                            btw would a straight fin be better off or what?
                            MY RETIREMENT PLAN?????.....POWERBALL
                            74 vintage kirby clasic hydro, pursuit mono, mg, 47'' mono, popeye hydro...

                            Comment

                            • Jlov
                              Senior Member
                              • Nov 2013
                              • 825

                              #854
                              Awesome everyone. Did a few runs and adjustments each time and the hop and bounce is now gone. Thanks Slo,I turned it just slightly clockwise on the last run and that was perfect. You were right it was too far forward at first.

                              This thread is now 29 pages long of which about 20 I've been around for. Would never have been able to build or run properly this Popeye without this thread. Great thx to all who have helped me along the way.

                              Tim,my Dad once told me "the only stupid or long winded questions are the ones that never get asked". I have heeded that advice for along time and benefitted greatly from it. I like you feel hesitant at times to ask questions but their are a bunch of extremely knowledgable people on here that always seem willing to help. Glad to be a member here.

                              I'm starting a Daytona twin build this weekend and will really be counting on members here for that build......
                              Last edited by Jlov; 03-28-2014, 03:02 PM.

                              Comment

                              • tlandauer
                                Fast Electric Addict!
                                • Apr 2011
                                • 5666

                                #855
                                Jeff, it took me three years to get where I am at, and only 20 pages for you!
                                Now start a new thread on your Daytona twin build!
                                Too many boats, not enough time...

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