Category Archives: aircraft

Diffraction Problems with Window Screens

Occasionally I will get aircraft heading in to Boeing Field come right by the house. Late Friday afternoon, two Boeing test jets were coming my way. One was the first 777X and the other was that first 737 Max7. The usual route brings them just slightly north of the house so I was ready. However, the Max was heading just slightly south of the normal track and looked like it might go the other side of the house. At the last minute, I realized it would and ran through the the other side.

I got the window open but didn’t have time to remove the screen. I thought it would take out some light but figured the large aperture of a big lens would just blur out the screen mesh since it was so close. Through the viewfinder, things look pretty good. However, when I downloaded the shots, I realized the shots were totally awful. The screens had caused shadowing of the images. The center image was there but I could see shadow versions about and below. Then I got to one with a beacon flashing and that showed exactly how the pattern of light was scattered. Based on what I see, I assume this is a diffraction effect. It is a useless shot but it is very interesting which is why I am sharing it.

Old Children’s Hospital S-76

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Quite a few years back, I was at Van Nuys when the Children’s Hospital Sikorsky S-76 flew over on final approach. I found out a little while later that this helicopter had been donated by Helinet. I found this while talking to Alan Purwin who ran the company prior to his death. It was a nice looking helicopter which isn’t hard since the S-76, while an old design, is a sleek looking machine.

I made a detour recently to Anacortes airport, purely because I had never been there before. Nothing much was going on but, stored at one end of the airfield was this S-76. It looked exactly the same. The registration had been changed but zooming in on the airframe, I could just make out the outline of the old numbers. Sure enough, it is the same airframe. Clearly, it isn’t looking like it is going anywhere soon but it did provide years of good service.

China Airlines Cargo 777F

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We were walking along the shore in Mukilteo on a sunny Saturday afternoon when I looked up and saw something large on the approach to Paine Field. At first I assumed it was one of the scheduled E175s but, as I pulled the camera up to my eye, I realized it was a 777. As it got closer, it was apparent that it was a China Airlines Cargo freighter on test – the first time I have seen one. The midwinter light made for a nice shot.

The End is Nigh for the Sentinels

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On two previous occasions, the RAF’s Sentinel fleet has made an appearance on this blog. The most recent was for a damp example at RIAT that was in this post. The Sentinel fleet has spent a number of years under threat of retirement. It is a small fleet and it is custom made so it will have very high sustainment costs. Also, it provides a role principally in support of the Army so I imagine it isn’t the highest priority for some of the RAF upper echelons.

Previous reports of its retirement have been followed up with a reprieve. However, the MOD in the UK has just issued a request for proposals (RFP) for companies to come and dismantle the aircraft (along with a pair of E-3D Sentrys). This looks like it is really going to happen. The RFP states that the aircraft are not for reuse and that the selected contractor will disassemble them on site at RAF Waddington. Not only is the RAF not going to use them but they are making sure no one else does.

Various bits of information have flowed around about them. There is a suggestion that obsolescence issues mean a lot of equipment needs to be replaced. Since that will be a custom process, it will be an expensive thing to do and, with the axe having been hanging over them for a number of years, spending a lot of money on them if they might not be around for much longer just doesn’t seem likely. Maybe there are other issues too.

I’ve had a soft spot for V Sqn from the Lightning and Tornado F3 days. Seeing it move from a fast jet to a bizjet derivative was a bit odd but at least it survived while so many other squadrons disappeared. I wonder whether it will surface again. Maybe an F-35B unit at some point? We shall see. My best interaction with the Sentinels was on a Red Flag when I got to shoot them in some great light. Farewell you oddball.

The Latest FedEx 767 On Test

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I wasn’t close to the FedEx 767 as it came in and shot a missed approach but the low sun angle on the underside of the jet looked quite nice. The crew flew a tight pattern back to make their approach and landing. They did run reasonably long so I got to see them as they turned off the head back to the ramp. They were going to take an earlier exit but something was in the way so I got a bit lucky.

Kenmore Caravan on the Short Runway

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Kenmore’s floatplane operations are the best known part of their business but they have a lot of flights using the Cessna Caravan from land bases. One of them returned to their Boeing Field base while I was there. The Caravan is perfectly capable of using the short runway at the airport and, with plenty of traffic using the main runway, this one came in on the short side. That brought it closer to me so I was pretty happy about it.

Why Not Go For Low Shutter Speeds For Fun

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A holiday visit to Paine Field saw that something interesting was heading for departure. It was unlikely I would get across the field in time to catch it and I didn’t. However, since I was there, I thought I might as well hang around for a bit and shoot some departures. There were a few piston types heading out as well as a PC-12. Since none of them were too important to me, I decided to play with shutter speeds around 1/100^th of a second. With the 500mm, this doesn’t result in a high keeper rate.

It does provide a lot of prop blur which was the point since, with no background, you aren’t getting any sense of speed. It was more a case of seeing what I could get and having some panning practice. When looking at the shots on the computer, some of them are clearly junk without much inspection. Others look okay until you get zoomed in. A few of them are sharp even zoomed right in and they are the ones that don’t get culled.

G650 Heading Out

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My first trip to my new spot at Boeing Field, as described in this blog post, resulted in a fair bit of activity. Not long after I got there, I saw a Gulfstream G650 taxiing from the south end of the ramp towards the departure runway. This location gave a few spots where the jet was clear of buildings and you could get a shot. It ended up holding at the threshold for quite a while as other movements came and went.

Once it got clearance, it made a spiritedly takeoff. Long range bizjets are rarely making use of their full capabilities so, when they are lightly loaded, they are off in quick time. This was the case for the G650 and I got some shots of it rotating and climbing away. Not a bad start for this spot.

Asia Pacific 757 Freighter Helping UPS

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Looking for something unusual keeps things interesting when you have been shooting the same stuff for a while while not able to go anywhere. I had seen a couple of movements in recent months of Asia Pacific Airlines and their Boeing 757s. However, I had never been in a position to catch one. Christmas Eve I was off work and one was due in to Boeing Field. It was on their own flight number but I had a suspicion that they were supporting UPS.

Sure enough, when the jet landed, it taxied up to a spot on the UPS ramp and started unloading. UPS had been running a large amount of movements through Seattle that day and the preceding days so I guess the Christmas rush meant it was necessary to charter in additional capacity to deal with the demand. An interesting looking plane and nice to see something different for a change.

More on the Stored Southwest Jets

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When the pandemic first hit in a big way, I wasn’t going anywhere to shoot but, once it was okay to make trips without interfacing with other people too much, I did got to Paine Field to see the stored Southwest 737s and I wrote about it in this post. I was back up there recently and, while they have been cycling jets in and out, there are still a lot of their 737s parked there – predominantly but not only, 737-700s.

Some of them are up near the old cross runway and lined up in a good spot for a shot when the morning light is on them. I was a little later than ideal but I still managed to get something. Many of them are around near the FHCAM facility – still sadly closed and with no idea what the future might hold. I had brought some steps which meant I could shoot over the fence. The planes are really tight in there so I may a lot of use of panos to get decent coverage of the planes. I did also get some of the planes further away.

The coverings on the openings on the airframes were pretty comprehensive. Everything that is exposed has been taped over to prevent moisture or creatures getting in and causing harm. There have been various stories coming out of the issues affecting planes that have been in storage for a long time so, while this prep is good, there will still be much to do when these planes are returned to service. Meanwhile, Southwest is now taking delivery of its Max jets so it will be interesting to see how many of these planes do have a future.