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      braz.models


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      Post #67503, posted on 06-14-2017 GMT-5 hours    
      Hello Folks,

      Done some homework lately. I'm not an expert on L-1011's, so will need advices from someone that knows more the me.

      From what I've understood from my researches is that the L-1011 had three type of engines.

      -Rolls Royce RB211-22B (first row of below picture) on prototype and early L-1011 versions.

      -Still on early production line, Lockheed found out that thrust reverser on hot section was causing hot air injection issues. Therefore, thrust reverse on hot section was removed and entire exhaust cone. It is still the original RB211-22B with a redesigned exhaust cone (second row of below picture). Haven't found any trace of what is the suffix of this engine, RB211-22C, -22D, -22X, -524B1......Does anyone know how this engine is called???

      -For last RB211-524B4 were adopted. Compared to the RB211-22B, cowling has been stretched by 7,63In and relative panel lines and hatches contours are a bit different. Also a completely new hot section exhaust.



      Looking through many photos, they are a couple of things that are puzzling me. On RB211-22Bs pylon blends into front cowling intake edge and it has it's own hatches contours and locations. The RB211-524B4 has a shape edge between pylon front edge and cowling, as well as it's own hatches contours and locations. I've found several photos of RB211-524B4s with the front cowling section (from intake edge till Power Plant Station PPS 72,75) of a -22B!! See photo below. How could this be???



      For last, found this photo of a L-1011 (see below photo) with RB211-524B4 as engine n1 and RB211-22(unknown suffix) as engine n2!!!! Can an aircraft fly with two engine types?



      Does anyone have diameter and width of the wheels and tires?

      By the way, constructive critics are always welcome. Before someone starts saying that it is too wide, too narrow, too round, etc, the design was based on maintenance manuals and several hours spent measuring the engine on display at Cosford (UK) museum.

      Cheers,
      Ivo

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      Post #67504, posted on 06-14-2017 GMT-5 hours    
      Hi Ivo, here is a link from Bridgestone showing tire dimensions for many airframes. Hope this can be of help to you.

      http://www.bridgestone.com/products/speciality_tires/aircraft/products/applications/pdf/tire_applications.pdf

      Romy

      "We travel the world over in search of what we need, yet return home to find it."

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      gjake


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      Post #67508, posted on 06-15-2017 GMT-5 hours    
      Ivo,

      Here is the answer to one of your questions; two different after bodies on the same aircraft.


      http://www.airliners.net/photo/Delta-Air-Lines/Lockheed-L-1011-385-1-TriStar/1111274/L/&sid=8421d947771b745151be0fcf94492e7d

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      braz.models


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      Post #67510, posted on 06-15-2017 GMT-5 hours    
      Thanks Romy and Gene for the help.

      Cheers,
      Ivo

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      skippiebg


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      Post #67526, posted on 06-17-2017 GMT-5 hours    
      Ivo, you got it right practically all the way. The original afterbody was dropped in 1975-ish. It was replaced with the "15 degree afterbody" (long, smooth) which was purely an interim solution pending certification of the ultimate "11 degree afterbody." That was fitted soon after (from about 1977-ish onwards) and replaced all prior designs. It was common to see aircraft fitted with mixes of 15 and 11 degree afterbodies. Your LTU example has 22s (or else 524s, I don't know) in all three locations.

      The afterbody is not a marker of engine mark. Afterbody fitment and refitment did not change engine designation. Most -22s had all three afterbodies fitted, while most -524s had only the last design fitted.

      As to diverse parts of -22 and -524 cowlings crossfitted to diverse engines, the entire forward end of the main cowling was dimensionally and aerodynamically identical between engine marks, so certification made no difference between marks and operators were free to swap parts as they saw fit.

      The RB211 was the simplest, in terms of evolution and visual differences between marks, of all first-generation high bypass ratio turbofans and you have summarised them all.

      EE are now releasing their kit with the 11 degree (final) afterbody, so I am unsure about the commercial value of releasing an aftermarket engine. But that, of course, is your decision!

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      usairman737


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      Post #67538, posted on 06-19-2017 GMT-5 hours    
      Ivo,

      A lot of us hoarders have Otaki L-1011 kits we'd like to build, now that a reasonably priced kit is available. I would definitely be interested in some newer aft-section castings.

      Gerry - DEN

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      Post #67539, posted on 06-20-2017 GMT-5 hours    
      ^ and some of us who bought the first release of the EE kit would like some of the later engines too, without having to buy the forthcoming version of the kit. And new wheels!

      Roy - GVA/BRS

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      Post #67540, posted on 06-20-2017 GMT-5 hours    
      ...and some of us may have the Airfix and Revell/Hobbycraft offerings in their stash (like me), which may also benefit from some corrected/updated engines.

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      braz.models


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      Post #67544, posted on 06-21-2017 GMT-5 hours    
      Thanks Peter for your exhaustive explanations. Now the puzzle is complete and can see the entire picture. Very interesting story.

      I'm aware that EE is going to release a new L-1011 with newer engines. For various reasons I'll issue my resin sets anyhow. Main one is that I've already invested too much time-efforts and would cost me less to issue it rather then drop everything. I usually adopt a non written "gentlemen agreement" and do not criticize quality of other manufactures but encourage to support them by buying their products. From the moment that vast majority of EE kits are pure rip-off of other manufactures, I won't be very diplomatic. They even copy the evident errors of other manufactures. Therefore, chances that their new L-1011 engine will be incorrect and based on eyeballing photos are quite high. Other reason is that with resin engines, modeler won't need to fill and sand all seems between part. Specially those odd and not easy to fix in the intake area. For last, as Gerry, Roy and FokkerFan said, lots of Otaky, Revell, Airfix and EE kits out there still waiting of a new engine.

      Cheers,
      Ivo

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      buzz


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      Post #67545, posted on 06-21-2017 GMT-5 hours    
      Thanks, Ivo, I'm very happy to hear that. Are you planning to do anything for the centre engine intake?

      Will you be producing the wheels as well? I'd much rather have some resin sets than deal with the wheel halves that EE provide.

      Roy

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      braz.models


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      Post #67576, posted on 06-27-2017 GMT-5 hours    
      Hello Roy,

      At this stage, I'm not sure if I'll be doing the central engine intake. Although is a very simple "S" duct shape, it could be difficult to cast with both sides open and without any inner joint seem.

      Finished last night to 3D design the wheels. So, those will be available as well.

      Cheers,
      Ivo

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      buzz


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      Post #67578, posted on 06-27-2017 GMT-5 hours    
      Thanks, Ivo. Looking forward to ordering a few sets of engines and wheels.

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      Post #67579, posted on 06-27-2017 GMT-5 hours    
      I can't wait too

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      Post #67688, posted on 07-16-2017 GMT-5 hours    
      This is very good news... Keep us updated please and rest assured orders will be coming in from myself.

      Reg
      Mattias

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      Doug Seeley


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      Post #67694, posted on 07-17-2017 GMT-5 hours    
      You guys and gals who toil in resin are true artists who have revolutionized the hobby - amazing stuff. Thanks heaps, Doug

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      Post #67752, posted on 07-25-2017 GMT-5 hours    
      Dear Boys & Girls, I recall reading that the definitive RB211-524B4 engine featured a sharper intake lip for higher mass flow on the TriStar 200 & TriStar 500 which may account for the different access hatches and pylon leading edge fairing that Ivo has illustrated......

      Terry (Caravellarella)

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      Or maybe its MAYBELLINE...............

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      buzz


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      Post #68085, posted on 09-06-2017 GMT-5 hours    
      Ivo,

      Do you have a date that you expect to release the engines and wheels? Before Telford?

      Thanks,
      Roy

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      braz.models


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      Post #68102, posted on 09-08-2017 GMT-5 hours    
      Quote
      Do you have a date that you expect to release the engines and wheels? Before Telford?



      Hello Roy,

      Plan is to have them by SMC show in Eindhoven but timing is too tight so it is more realistic during Telford show.

      Cheers,
      Ivo

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      Post #68103, posted on 09-08-2017 GMT-5 hours    
      Thanks, Ivo. That might be just enough to push me to go this year (I've not been for at least 7 years).

      Roy