Tag Archives: nozzle

Tango Really Does Like to Get Those Jetpipes Close

Those that have seen photos from the air show scene in 2024 may well have seen the spirited departure that the Royal Canadian Air Force Hornet demo includes. The CF-188 gets pulled aggressively to the vertical and the speed of rotation is chosen carefully so that the engine nozzles get very close to the ground, but the airframe is already lifting and climbing so that no contact is made. It makes for some cool shots. At Abbotsford and Comox, I was nowhere close enough to get a good look at the moment of rotation, but Bremerton provided a better chance. Rather far away so a bit hazy but still pretty cool. Shame the special demo jet broke again, and we had the twin tub instead.

Marks of a Mixer Nozzle

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I was running through some images of a Dornier 328Jet that I had shot at Boeing Field. I was zoomed in close to check for image sharpness when my eye caught the inside of the nozzle of the engine nacelle. There was an interesting pattern on the inside. Judging by the layout of the staining, I think the mixer in the exhaust results in varying deposition of material on the walls. This is the sort of thing that really appeals to me and probably no one else but it is my blog!

Titan II Installation

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The Titan IV at Evergreen isn’t the only Titan there. They also have a Titan II ICBM. This is installed upright in a recreation of the launch facility that would originally have been buried deep under a remote part of the US countryside. You can walk down and check out the control facilities (probably a touch closer to the silo than would originally have been the case) as well as get down to the base of the silo where the twin nozzles of the missile are. Looking up at the missile from down there is quite an impressive sight.

The Titans were liquid fueled rockets. The process of getting them ready for launch was a lot more complex than for the solid fueled rockets like the Minuteman that replaced them so they were a lot less responsive. However, they fulfilled their role for a long time. They also had a secondary career as manned launchers. The Titan II was the launch vehicle for the Gemini missions so it is a lot more familiar to most people than would be the case for the average ICBM!

Nozzle Details on Titan IV

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The missile display at Evergreen Aerospace Museum is impressive. They have sourced a lot of different types and they have a Titan IV section lying on its side. You can get up close to the nozzle of the rocket motor and it is a cool thing to see in detail. Looking from a distance, they look very simple but, once you are close up, the complexity of the structure and the cooling structure to stop the plume from burning right through the nozzle are really impressive. The shaping of the nozzle itself, in contrast, is very simple. The expansion ratios are calculated carefully and the profile is a smooth transition to minimize the losses. Quite the contrast.