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Graeme Frew new Boeing 787

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  • #16
    Re: Graeme Frew new Boeing 787

    Originally posted by RAD2LTR View Post
    It is similar, and I think they got the idea from Czech Mate, but went up an engine size from the R2800 to a 3350. The extra weight of the larger engine made it very scary to fly so they added the T33 tail to it and that made it fly better.

    Will

    IIRC it also was a turbo compound with the PRT's!

    Kevin

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    • #17
      Re: Graeme Frew new Boeing 787

      Originally posted by FuryFan View Post
      IIRC it also was a turbo compound with the PRT's!

      Kevin
      Based off the exhaust setup, I'd have to say you are right. I recall being told why PRT engines weren't the best for racing, but I can't remember why.

      Will

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      • #18
        Re: Graeme Frew new Boeing 787

        Any word at all on future of this plane? 1998 was a LONG time ago. Personally, for me those small wings and that huge engine give me great fears for the pilot wresting it around the pylons. An R2800 is a great engine for it. We need more big engine Yaks out there. The spirit of Bob Yancy lives on in some of us.

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        • #19
          Re: Graeme Frew new Boeing 787

          Originally posted by GeeBeeZ1931 View Post
          Any word at all on future of this plane? 1998 was a LONG time ago. Personally, for me those small wings and that huge engine give me great fears for the pilot wresting it around the pylons. An R2800 is a great engine for it. We need more big engine Yaks out there. The spirit of Bob Yancy lives on in some of us.
          As far as I can tell, this birds future is sitting right where its at until the museum does something with it, or sells it. I'd be shocked if it ever races. That said, one of the Sport guys might get ambitious and offer the museum some $ and strike a deal. Who knows.

          Will

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          • #20
            Re: Graeme Frew new Boeing 787

            Originally posted by RAD2LTR View Post
            As far as I can tell, this birds future is sitting right where its at until the museum does something with it, or sells it. I'd be shocked if it ever races. That said, one of the Sport guys might get ambitious and offer the museum some $ and strike a deal. Who knows.

            Will
            Or like Tom Dwelle go from T6 to Unlimited(Gold). Speaking of which did I see a mention the EX Critical Mass, BMB is going to be back racing in stock form or did I misunderstand?

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            • #21
              Re: Graeme Frew new Boeing 787

              Originally posted by GeeBeeZ1931 View Post
              Or like Tom Dwelle go from T6 to Unlimited(Gold). Speaking of which did I see a mention the EX Critical Mass, BMB is going to be back racing in stock form or did I misunderstand?
              It would be really cool to see the Dwelle's Sea Fury on the ramp in September, but I highly doubt that will happen. I think that family is done racing.

              Will

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              • #22
                Re: Graeme Frew new Boeing 787

                Originally posted by RAD2LTR View Post
                Based off the exhaust setup, I'd have to say you are right. I recall being told why PRT engines weren't the best for racing, but I can't remember why.

                Will
                I was once told by someone knowledgeable that the PRT's had issues with lubrication under the G forces required at Reno. If I was misled I'd be happy to be corrected. I'd imagine if it was suited for air racing more than one airplane would've tried it.

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                • #23
                  Re: Graeme Frew new Boeing 787

                  Originally posted by knot4u View Post
                  I was once told by someone knowledgeable that the PRT's had issues with lubrication under the G forces required at Reno. If I was misled I'd be happy to be corrected. I'd imagine if it was suited for air racing more than one airplane would've tried it.
                  That's what I was told as well.

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                  • #24
                    Re: Graeme Frew new Boeing 787

                    What is a PRT?

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                    • #25
                      Re: Graeme Frew new Boeing 787

                      I do believe PRT stood for "Power Recovery Turbine". Unless you were a mechanic, then it was "Parts Recovery Turbine".

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                      • #26
                        Re: Graeme Frew new Boeing 787

                        Sounds like FORD (FixOrRepairDaily) or GTO (GarbageTruckOverdrive)
                        Lockheed Bob

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                        • #27
                          Re: Graeme Frew new Boeing 787

                          Originally posted by John H View Post
                          What is a PRT?
                          It's like a turbocharger without the compressor, instead of capturing the energy from the exhaust and using it to boost the intake pressure it was mechanically linked to the power section to try and utilize (or recover) that spent energy directly. Those engines had two speed blowers and they were making plenty of manifold pressure. It might've sort of worked for the airlines but it wasn't rugged enough for air racing.
                          Last edited by knot4u; 07-16-2022, 03:32 PM.

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                          • #28
                            Re: Graeme Frew new Boeing 787

                            Originally posted by Lockheed Bob View Post
                            Sounds like FORD (FixOrRepairDaily) or GTO (GarbageTruckOverdrive)
                            Ford, (found on road dead). LMAO. Knew a guy that when he heard "fix or repair daily" or "found on road dead" he went ballistic.

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                            • #29
                              Re: Graeme Frew new Boeing 787

                              The R-3350 turbocompounds were some of the most fuel-efficient spark-ignition engines ever built. Various sources list them with a BSFC (Brake Specific Fuel Consumption) as low as 0.380 pounds of fuel consumed per hour for each horsepower developed.

                              Compare this with an O-360 at 75% power with 0.480 lbf/hr/bhp, or the R-4360 at 0.440 lbf/hr/hp.

                              The engine in the Toyota Prius, which benefits from much more modern materials, design, ignition and induction, beats the R-3350TC by just a little - 0.370 lb/hr/hp.

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