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      Tango-Bravo


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      Post #66962, posted on 04-18-2017 GMT-5 hours    
      Do the engines of the Zvezda 767-300 kit most nearly resemble PWs or GEs...or some of both, ala the Revell 767? (the subject has probably been covered previously but did not turn up in my search)

      Thank you.

      Todd
      IWA

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      UpperDeck


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      Post #66964, posted on 04-18-2017 GMT-5 hours    
      The engines included in Zvezda's kit are the CF6-80A.

      BMW 850 Ci E31 / Mercedes-Benz 560 SEC W126

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      BruinPrideBand


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      Post #66967, posted on 04-18-2017 GMT-5 hours    
      They're definitely the CF6's. I've heard they are too small, however.

      Chris

      "Sorry Goose... But it's time to buzz the Tower."

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      herby169


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      Post #66969, posted on 04-19-2017 GMT-5 hours    
      Definately GE with the longer engine cowles, but a little bit too small, that is correct.

      Regards

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      gavmh


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      Post #67061, posted on 04-27-2017 GMT-5 hours    
      The Zvezda engines are definitely representing the CF6-80A engines.
      I really don`t know where you guys get all the dimensional data from. I would highly appreciate to get those data from you, though I am pretty sure nothing officially exists.
      I did some extensive research and calculations using a variety of pics to specify the external dimensions of these engines.
      Again, the Zvezda engines are correct in dimensions, but have a some other flaws.

      Kurt

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      BruinPrideBand


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      Post #67062, posted on 04-27-2017 GMT-5 hours    
      Kurt, I don't have any real data since I do most of my modelling by what looks right to me... but the kit engines just look slightly too small I replaced them with the set from Ivo.

      However... I'm touring the Boeing plant in Everett Washington today (the things I have to do in my line of work... haha) Maybe I'll ask!


      Chris

      "Sorry Goose... But it's time to buzz the Tower."

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      aro757


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      Post #67063, posted on 04-27-2017 GMT-5 hours    
      Could this be a case of looking at all the new engines recently? The engines on the 777, 787, A350, etc. are huge! After looking at photos of those planes for a while, all other engines look really small. I was looking at a picture of a 742 with P&W engines the other night and kept saying to myself, "those engines are way too small".

      I'd like to know for sure if the engines on the Zvezda 767 are really too small compared to real dimensions. The "looks too small" can't be trusted anymore...

      Regards,
      ahmed |
      --o--o-( )-o--o--

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      LH707


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      Post #67064, posted on 04-27-2017 GMT-5 hours    
      The fan diameters are usually published, so use that, a set of calipers, divide by 144, and then compare side view proportions to see if they're good overall.

      Regarding engines being off-size, I opened an A340 kit the other day and thought that those hairdryers must be in 1:200 scale

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      BruinPrideBand


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      Post #67067, posted on 04-27-2017 GMT-5 hours    
      Here's a link worth reviewing: https://www.geaviation.com/commercial/engines/cf6-engine

      "Sorry Goose... But it's time to buzz the Tower."

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      Jennings


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      Post #67072, posted on 04-27-2017 GMT-5 hours    
      Dimensions taken from the 767 structural repair manual station diagrams...

      Measurements are 1/144 scale.


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      gavmh


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      Post #67075, posted on 04-28-2017 GMT-5 hours    
      Fantastic Jennings, this confirms the external data for the -80A engine I figured out by my calculations.

      Kurt

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      Post #67082, posted on 04-28-2017 GMT-5 hours    
      I knew Jennings would come up with exactly what we needed. Thanks again!

      Chris

      "Sorry Goose... But it's time to buzz the Tower."

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      DullesFlyer


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      Post #67093, posted on 04-29-2017 GMT-5 hours    
      Jennings,

      This is very helpful as is the link above from GE. Do you have the front view and any diagrams of the spinners, fans and blades?

      Having seen a million of these 767 birds with PW, RR and GE in person, I can tell you that there are nuances to the engines that no model kit manufacturer has nailed, yet. I bet Kurt will be the first to get it correct. I wonder if the manufacturers actually go to the airport and look at the real aircraft as it is obvious to the eye when you look at these engines in person.

      Same thing on the Zvezda 320 and 321 engines... the spinners are way off again. Again, all of this can be reworked and fixed and grateful that we have anything to use...
      By the way and head's up, I purchased the Braz 777 1/144 PW, GE and RR engine aftermarket replacements and only the GE90 is close the the correct size. On the PW and RR the engines are too small. For example, the fans, spinners are too small in size, diameter / circumference. Too bad, because they made a major effort to build these engines... again they can be reworked and better than nothing.

      John

      On Arrival (1/144 scale):

      SQ A350-900
      BA A380-800
      BA 747-400
      EK 777-300ER
      AA A320-200
      NW DC10-40

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      Jennings


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      Post #67094, posted on 04-29-2017 GMT-5 hours    
      Quote
      DullesFlyer :Do you have the front view and any diagrams of the spinners, fans and blades?



      No.

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      braz.models


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      Post #67119, posted on 05-01-2017 GMT-5 hours    
      Quote
      By the way and head's up, I purchased the Braz 777 1/144 PW, GE and RR engine aftermarket replacements and only the GE90 is close the the correct size. On the PW and RR the engines are too small. For example, the fans, spinners are too small in size, diameter / circumference. Too bad, because they made a major effort to build these engines... again they can be reworked and better than nothing.



      Dear John,

      True, I did put lots of efforts into the B777 engine sets. Do you think I was that silly in not double checking fan disk diameter and all other dimension? According to PW and RR web sites, product brochures and specially, maintenance manuals, respective diameters are 112 and 110In!!! Free to check them with a micrometer if they are correct or not. …and I am 100% sure that they are correct. If you still think that they are too small, then please advice PW and RR that *all* their reference material is completely incorrect!!!
      Same applies to the GE engines, if they are “close to the correct size”. By the way, what is the correct size of the GE engines?

      The following is an appeal that I say to all modellers on any forum. It is not for only this specific thread but, in general, for all topics. It is enough two words to destroy reputation of a kit. I read way too often of so called “experts” that criticise a kit because it is too wide, too narrow, too short and so on simply based on personal impressions or by eyeballing photos, **without** proving what their stating!! If it is incorrect, please PROVE IT with real facts! …authentic factory drawings, maintenance manuals, direct measurements, etcs…
      Critics are always welcome, as long as they are constructive and proven without any doubt to be correct. Anything else that is just useless “bla bla bla” that only harms our hobby.

      Cheers,
      Ivo

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      LH707


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      Post #67123, posted on 05-01-2017 GMT-5 hours    
      Well put, Ivo. FWIW, I think your A340 nose looks great, but I don't have the data to prove it

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      A350fan


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      Post #67126, posted on 05-01-2017 GMT-5 hours    
      I'm on Ivo's side here.
      Being an enthousiastic user of his kits for a few years I have never found any fault with them.
      Thank God for people like Ivo who are willing to put a lot of time and effort in their product so we can all have a choice and build that one model we really want.
      Keep up the good work guys !! You are the ones keeping this hobby diversified and interesting !!
      Cheers,
      Jan