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Post by darrenvox on Jul 22, 2014 1:39:40 GMT
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Post by michael on Jul 28, 2014 20:59:42 GMT
I could be wrong but I dont think that type of 707 has been modelled to date by HJG, looks like a re-engined 707 with the jt8d's.
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Post by aerofoto - HJG Admin on Jul 28, 2014 21:46:10 GMT
I thinks it's the P&W JT8D-217 (or -219) modification/re-engine. We do currently represent that particular engine modification among our B707-320B ADV and -320C 3D models. It's the "HK3" model version in particular .... already applied to the following texture assigments .... B707-320B ADVLOWA LTD N88ZL B707-320CAIR MEMPHIS SU-AVZ ISLAMIC REPUBLIC OF IRAN EP-AJD Mark C AKL/NZ
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Post by Benoit - HJG on Jul 29, 2014 18:16:39 GMT
Actually those engines are still PW JT3D-3B but with hush kit stage III, visually modified on the outside with a slimmer/smoother cowl and intake, very similar to the JT3D-7 that adorned the DC-8-63s, but with modified thrust reverser systems. Eng 2-3-&4 still have the turbo compressor inlets which are integral for pressurization of the aircraft cabin.
The re-engined B707 with JT8D-217/-219 engines don't have the turbo compressors atop of engine 2-3&4, pressurization comes from air bled off the compressor from within the engine, which is routed through air conditioning packs.
Have a look/listen to the engine differences.
B707-RE with JT8D-219 engines.
LOWA Ltd B707-330B with JT3D-3B engines.
Cheers
Benoit
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Post by aerofoto - HJG Admin on Jul 29, 2014 19:56:42 GMT
"THANKS" Benoit It looks like I "screwed the pooch" on that analysis then At a quick glance .... I really did think they were the P&W JT8D re-engine version Mark C AKL/NZ
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Post by Benoit - HJG on Jul 30, 2014 12:12:17 GMT
Mark, not at all... I thought the same as you did until I was able to see and hear the sound differences, as soon as I heard the LOWA Ltd B707 startup it's engines, which is also fitted with an APU, I knew I was on to further research this, as it didn't sound like JT8D-200 at all... There is probably more info about the JT3D retrofit, but that's all I was able to find so far as only few 707s have had this conversion done that I'm aware of.
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Post by darrenvox on Aug 3, 2014 6:53:38 GMT
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