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Inline Horses or Wright Roundies?

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  • #31
    Re: Inline Horses or Wright Roundies?

    Originally posted by supercub View Post
    How bout a V-24 3420

    Brian
    I think a P-38 sporting a couple of Griffins...with counter-rotating props would be pretty cool.....(and easier to fabricate than a 3420....). FOF right up the road from Thom has an airframe just sitting around that would make a nice place to start a Griffon Powered Lightening out of...

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    • #32
      Re: Inline Horses or Wright Roundies?

      Originally posted by supercub View Post
      How bout a V-24 3420

      Brian



      Here ya go.....actually, I think it's more like a W-24
      Last edited by V1670; 07-07-2013, 11:22 PM.

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      • #33
        Re: Inline Horses or Wright Roundies?

        Originally posted by V1670 View Post
        [ATTACH=CONFIG]19782[/ATTACH]


        Here ya go.....actually, I think it's more like a W-24
        Holy crap. One can only dream about what might have been accomplished with piston engine developement, had the turbine never been invented!
        Wayne Sagar
        "Pusher of Electrons"

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        • #34
          Re: Inline Horses or Wright Roundies?

          I'd love to see this one in a racer :



          Not clarified in english Wiki: motor also projected as model 222G with (6 x 6) 36 cylinders, 69,6 litres displacement. 3500 hp @ 3000 rpm (stock).

          As Mike Nixon said: "Small pistons, lots of them and RPM is where the speed is"

          Gibbs

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          • #35
            Re: Inline Horses or Wright Roundies?

            yes, griffon, not allison. Brain fart. And Big Jim's explanation is better then my quick post.

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            • #36
              Re: Inline Horses or Wright Roundies?

              Originally posted by V1670 View Post
              [ATTACH=CONFIG]19782[/ATTACH]


              Here ya go.....actually, I think it's more like a W-24
              Henry Kaiser had Bart Carter and Jack Regas build an Unlimited hydroplane called Scooter Too in 1955 to be powered by a W-24. When it ran, it was very fast, and in fact led most races it was in....but it rarely finished. It was kind of a wild rider because it was a bit overpowered (think a Vega with a 427 crammed in under the hood or something), but it also had so much torque to it that it kept twisting the prop shaft like a pretzel and tearing the bottom out of the boat. Over it's career it participated in only 8 races....and sank in 5 of them.
              Attached Files

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              • #37
                Re: Inline Horses or Wright Roundies?

                Originally posted by Big_Jim View Post
                Over it's career it participated in only 8 races....and sank in 5 of them.
                That ads new meaning to DNF, Did Not Float.

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                • #38
                  Re: Inline Horses or Wright Roundies?

                  Originally posted by V1670 View Post
                  [ATTACH=CONFIG]19782[/ATTACH]

                  Here ya go.....actually, I think it's more like a W-24
                  When Allison first conceived the idea it was called a DV-3420, as in double Vee. As far as the AAC/AAF was concerned, it was a "V" and so, was officially known as V-3420. Then its bigger brother was convinced (yes, you read that right), and it was called the DV-6840 (again with the DV). The idea was not as exciting as it sounds; it was two V-3420s positioned in-line with one slightly higher than the other, both connected (via two shafts each) to a common gearbox turning coaxial props. I think the gearbox was ready in 1946, but I don't know if it was ever tested.

                  Regarding the whole "V" vs "W" thing--the "W" was used first for "broad-arrow" engines like the Napier Lion, Isotta-Fraschini Asso-750, and many others where there are three banks of cylinders. When the side banks are flattened out, you get a "T," and when they go really far, it becomes a "Y." Although "W" would probably make more sense, the double Vees like the V-3420 and DB 606/610/613 are generally refereed to as a "V" or double Vee.

                  Certainly on paper there is no replacement for displacement. But when you hang that engine on an aircraft, "development" becomes a very important factor. A Jumo 222 might not finish the race and would definitely not finish the week. An XR-7755 would be too big for anything practical. Would you rather have a V-16 Chrysler IV-2220 or a V-1650? The Chrysler made 2500 hp on the bench in 44 or 45, but that is where development ended. The Merlin was begun in the early 1930s, entered service in the late 1930s, had a huge amount of development in the 1940s, continued to serve in the 1950s, found another life in hydroplanes, then went air racing, and the cumulative total of all that development is what we see in Strega. Not to mention that it was designed by a company that had some pretty good experience with the type. The Griffon is the same way, it just dd not get the same level of development because of war priorities and then jets.

                  But, it is interesting to contemplate what these "mystery" engines (Pennine, Crecy, H-3130, etc.) could do if development continued and their issues overcome. I think it would be a long time before a V-3420-powered aircraft would take Unlimited gold. Even if it is putting out 4000+ hp, what is it in? If it were just about displacement, then Dreadnaught would win again. Certainly those puny Merlins would not be able to keep up with an engine more than twice its size (R-3350), right? Of course, there is a lot more to it all. Perhaps there is no replacement for well developed displacement applied in the correct placement.
                  Bill Pearce

                  Old Machine Press
                  Blue Thunder Air Racing (in memoriam)

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                  • #39
                    Re: Inline Horses or Wright Roundies?

                    Originally posted by AAFO_WSagar View Post
                    Holy crap. One can only dream about what might have been accomplished with piston engine development, had the turbine never been invented!
                    Well, let's just fix that problem, then! It's just pieces of metal. Do something with it! How hard could it be?...

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                    • #40
                      Re: Inline Horses or Wright Roundies?

                      You have access to a CNC machine, don't you Thom?

                      Visions of Dr. Victor, "It's alive!" Bwahahaha
                      And of course, Wild Bill hissing Yesssss, master....
                      Leo Smiley - Graphics and Fine Arts
                      airplanenutleo@gmail.com
                      thetreasuredpeacock.etsy.com

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                      • #41
                        Re: Inline Horses or Wright Roundies?

                        Originally posted by Leo View Post
                        You have access to a CNC machine, don't you Thom?
                        Yup... And we tend to use them just for this purpose...

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                        • #42
                          Re: Inline Horses or Wright Roundies?

                          Originally posted by Leo View Post
                          You have access to a CNC machine, don't you Thom?

                          Visions of Dr. Victor, "It's alive!" Bwahahaha
                          And of course, Wild Bill hissing Yesssss, master....
                          Walk this way... no no no WALK this way.

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                          • #43
                            Re: Inline Horses or Wright Roundies?

                            Enjoy the videos and music you love, upload original content, and share it all with friends, family, and the world on YouTube.


                            More like this most days.

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                            • #44
                              Re: Inline Horses or Wright Roundies?

                              Don't forget your drop tanks
                              In round numbers, Strega lands over 2000 pounds lighter than it takes off.
                              Of coure it only goes what 100 miles or so.
                              I love these math tests:
                              Double some of the numbers and tripple a few more and add some structure here and there = Bigger, heaver + slower.
                              MN

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                              • #45
                                Re: Inline Horses or Wright Roundies?

                                Originally posted by MIKE NIXON View Post
                                Don't forget your drop tanks
                                In round numbers, Strega lands over 2000 pounds lighter than it takes off.
                                Of coure it only goes what 100 miles or so.
                                I love these math tests:
                                Double some of the numbers and tripple a few more and add some structure here and there = Bigger, heaver + slower.
                                MN

                                That brings up a question many people have had. Would Strega have enough fluid capacity to go after the 3K speed record, or is it just not doable?

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