Hi, I am a plastic modeler and I would like to build a scale model of a Boeing JB-17 with the Pratt & Whitney XT34 engine. I have seen photos of the JB-17 with XT34, and I am curious about a "ring" behind the propeller, visible through the engine cowling (see attached photo from this same forum, from NARA). The arrow in the edited photo indicates this "ring". Also, if anyone has pictures showing details of the front of the XT34 engine (as used in the JB-17), and details of the propeller hub, I'll be very grateful.
Pratt & Whitney XT34 question
- Thread starter Convair
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Thank you LowObservable. This well-known photo shows JB-17G s/n 44-85813 (N6694C) with the Wright XT-35 engine (this same aircraft was used to test the Wright R-3350 too). The JB-17 model that I want to build is the 44-85734 (N5111N), which used only the P&W XT-34.
Today, broadening my search on the Internet, inadvertently I found this photo of a P&W T-34 engine (with 7500 hp) being sold on e-bay (US$8,000.00). According to the photo, the "ring" - subject of my question - is actually the edge of a tube-shaped frame placed in front of the engine. I do not know if the XT-34 engine (which had only 5500 hp) used with the JB-17 had exactly the same type of assembly, i.e., that tube-shaped frame.
Tartle, an air intake is a good bet, maybe with air diffusion or air directing properties.
Today, broadening my search on the Internet, inadvertently I found this photo of a P&W T-34 engine (with 7500 hp) being sold on e-bay (US$8,000.00). According to the photo, the "ring" - subject of my question - is actually the edge of a tube-shaped frame placed in front of the engine. I do not know if the XT-34 engine (which had only 5500 hp) used with the JB-17 had exactly the same type of assembly, i.e., that tube-shaped frame.
Tartle, an air intake is a good bet, maybe with air diffusion or air directing properties.
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That's right; I'll rephrase it.... it is the intake, similar in style to the RR Tyne... the photograph makes it very clear... also see below. see also this cutaway.
Also P&W info sheet
Also P&W info sheet
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By the way modelling sites seem to have quite a bit about modelling this engine's nacelle... not necessarily on the Boeing nose but essential front end features do not change as they are linked to engine optimisation.
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