Tag Archives: typhoon

Typhoon Air Data System

Working through some older shots for another project, I ended up looking at some shots of an RAF Typhoon displaying.  As I was zoomed in on some of the shots, it was interesting to see the air data vanes on the underside of the front fuselage as the plane maneuvered.  There are several vanes around the underside of the front fuselage and the differences between them can tell yaw and pitch angles.  In one shot when the jet was climbing straight up, the vanes are all pointing in similar directions.  Shortly before this, as the jet was pulling hard, the angle of attack was higher and the flow up around the front fuselage results in some significant differences in vane angle.

This is the sort of thing that is very important when designing and clearing a flight control system.  We had a front fuselage wind tunnel model for the Typhoon during the development program.  This was used for intake design but also for air data system modeling.  The way in which the various vanes move is vital to understanding the control law requirements.  It is also important when considering failure modes.  If one vane should fail, how much it impacts the flight control behavior and how much the system detect the failure.  Will the aircraft be vulnerable to control loss in the interim?  The Tornado did not have as complex a flight control system, but it did have augmentation of the controls and, as it rolled, you would get quite different readings from the angle of attack probes on each side of the fuselage.  How much of a difference was normal versus what was a failure was an interesting analysis problem which I enjoyed working on.  My days on Typhoon were relatively limited and shortly before first flight so I never got involved with the results of the testing program, but I do enjoy looking at the resulting aircraft whenever I get the chance.

Typhoons are Back in Town

The Royal Air Force was back at Red Flag and the Typhoons were a big part of what they brought.  It’s always nice to see Typhoons up and about but, sadly, the RAF has adopted an approach of combining the squadron jets into a maintenance pool.  This means that they don’t carry individual squadron colors.  A couple off the jets still had markings – one from 6 Squadron and one from 41 Squadron – but, sadly, the rest of the jets were all plain gray.  Nothing colorful about them at all.  We did get some nice winter light to photograph them in but even that is not going to make them look that great.

Back to My Roots with the Typhoons

C59F3875.jpgThe Brits were at Red Flag in numbers too for 16-1. An E-3D Sentry was part of the AWACS fleet while a C-130J Hercules launched each day I was there. Judging by the dust and dirt on the underside, they were landing on rough strips out on the ranges during their missions. However, the thing I was most looking forward to seeing was the Typhoon. The RAF brought eight jets from 3 and 11 Squadrons. Most days six of them launched.

C59F4789.jpgIn my youth, I worked on what was to become the Typhoon in my BAE days. I was an aerodynamicist looking at airframe loading and the possible flight envelope for the first flight. I was not looking forward to the job when I was given it but working on loads turned out to be a great task and taught me a lot about structural limits, flight controls and the process for expanding the flight envelope. A mentor of mine had told me it sounded dull but was very valuable and he was spot on. I guess he is a smart guy because he has gone on to be rather successful in the company!

AU0E8613.jpgBack on topic, the Typhoon is something I am very pleased to have worked on. Getting to see them in action is great. The launches when we were out by the runways were great. When we were by the EOR, we were directly across from the ramp that the Typhoons were using so I managed to see them crewing up for the launch. Then, of course, they had to come right by us as they taxied out. I know it was a long time ago but I can’t help but still have a soft spot for them when I see them in use.

Typhoon Time

wpid13260-AU0E3361.jpgOne of the reasons I was keen to cover Red Flag this time was the presence of the RAF Typhoons. I worked on Typhoon many years ago and, while they are a common sight in Europe these days, I don’t get to see them very often. These aircraft had also been upgraded with the latest capabilities which they were testing during the exercise.

wpid13268-C59F0517.jpgGetting close to them during the launch, recovery and from outside the base as they were in the pattern gave some good chances to get some shots and to enjoy something I had a tiny hand in many years ago.

Red Flag Launches

wpid13296-C59F9722.jpgI was back at Nellis AFB recently for another Red Flag exercise for Global Aviation Resource. Chris Wood and I were there to cover it and the piece we put together can be found at this link. After the last visit to Red Flag when a security issue resulted in all of the media being escorted off base just before the launch, I was hoping for better luck this time. Fortunately, we did pretty well. The launch went well and, while the light was a bit poor for the departures, it got better as the day went on.

wpid13278-C59F8554.jpgStanding between the runways as the aircraft go off each side is pretty cool. We had a lot of USAF assets this time but also some Navy Growlers and RAF Typhoons. An RAF Sentinel was a nice addition – particularly as it was the aircraft with the squadron markings. One unfortunate element was that the launch was earlier than had been scheduled for our visit and the early aircraft off included the B-2s. We were still on the bus when they launched. I managed to get a shot with my phone out of the window but that was it. I do actually quite like the shot so all is not lost.

wpid13294-C59F9557.jpgThe feature has many more shots but here are a few to give you an idea of what was there.