Posts Tagged ‘Gulfstream’

Special Mission Aircraft

Tuesday, August 11th, 2015

My last flight assignment consisted of four days in Hawaii. It was one of those trips which make me (almost) feel guilty for associating it with the word “work.” Of course, there are plenty of journeys which are the polar opposite: long overnight flights, challenging weather, and minimum rest. But when you’re relaxing on a warm tropical island, those thoughts are easily banished to the back of one’s mind. For the moment, at least, the life of a charter pilot is a charmed one indeed!

This external pod really caught my eye when we passed it on the ramp. It contains the Earth Observing Laboratory's W-band cloud radar.

This external pod really caught my eye when we passed it on the ramp. It contains the Earth Observing Laboratory’s W-band cloud radar.

As we taxied onto the ramp at Kona International Airport (PHKO) after a beautiful flight out from the mainland, one particular aircraft caught my eye. It wasn’t the brand new G650 perched majestically at the front of a line of business jets but rather the aircraft next to it, a colorfully painted Gulfstream V equipped with pointy, silver-tipped under-wing-mounted pods. If it wasn’t for the words “National Center for Atmospheric Research” painted above the cabin windows, one might have wondered if this wasn’t some sort of weapons system.

I suddenly remembered that Hurricane Guillermo was slowly churning toward Hawaii from the southeast. The storm was still nearly a thousand miles from the archipelago and hadn’t impacted our flight that day in the slightest. As they say, “out of sight, out of mind.” I assume the G-V was there to conduct research on the storm systems (there were several large ones) brewing in the Pacific Ocean. And if the crew was able to spend a bit of time laying out by the pool… well, that’s just a cross they’d have to bear.

That uniquely outfitted airplane got me thinking about “special mission” aircraft and how business jets serve millions of people who never get to ride in them and are probably not even aware of their existence. Even among the general aviation community, I’d imagine plenty of folks would be surprised how many of these highly modified airplanes are out there and what they do for us on a daily basis.

NOAA operates several special mission aircraft, including this highly modified Gulfstream IV-SP, which flies hurricane and winter storm missions.

NOAA operates several special mission aircraft, including this highly modified Gulfstream IV-SP, which flies hurricane and winter storm missions.

I first became aware of Special Mission aircraft when I was in initial Gulfstream IV training. There were five pilots in my class. Most of us were employed by typical charter or Part 91 operators, but the youngest member of our cadre worked for NOAA, the National Oceanic and Atmospheric Administration. He had been flying the agency’s DeHavilland DHC-6 Twin Otter for a couple of years and was offered a slot flying either the Lockheed P-3 Orion or the Gulfstream IV-SP. He really loved the idea of flying the big turboprop, but the only training available for the Orion was through the military. As I recall, it was a two year long process, whereas training on the G-IV was available through civilian providers and wouldn’t take nearly as much time.

NOAA’s Gulfstream is one of those Special Mission airplanes which benefit everyone. The jet has twice the altitude capability of the P-3 Orion, which allow it to drop instruments known as Omega dropwindsondes into the storm from higher up. The data collected has improved landfall prediction accuracy by more than 20 percent, saving lives and property in the bargain.

This Lockheed-modified G-III is used for ISR missions.

This Lockheed-modified G-III is used for ISR missions.

I’m most familiar with the Gulfstream special mission aircraft because that’s the type I fly. At my home base, I’ve come across a Lockheed-Martin DRAGON, a highly modified Gulfstream III which serves as an ISR (intelligence, surveillance and reconnaissance) platform for military, homeland defense, disaster relief and humanitarian assistance needs. The Israeli air force’s airborne early warning aircraft is a modified G550. It’s so radically altered, in fact, that it’s almost unrecognizable as a Savannah product.

The U.S. government operates a large fleet of Gulfstreams to provide airlift for senior U.S. government officials, members of Congress and military leaders. The current fleet includes the G-IV (military designation C-20) and G-V/550 (C-37) models, which are operated by every branch of the military as well as the U.S. Coast Guard.

One of the most famous Special Mission business jets served our nation’s space program for more than three decades. NASA operated four Gulfstream II jets which were heavily modified to simulate the space shuttle’s descent profile. Officially known as the Shuttle Training Aircraft, the right half of the cockpit was standard bizjet; the left side replicated the orbiter’s flight deck.

The Shuttle Training Aircraft flight deck: half space shuttle, half Gulfstream.

The Shuttle Training Aircraft flight deck: half space shuttle, half Gulfstream.

Shuttle approaches were so steep — 20 degrees! — that the jets had to be operated with the main landing gear down and both Spey engines running in reverse at 92% N2. This YouTube clip shows the STA in action. Aside from a downline or spin in an aerobatic aircraft, I’ve rarely seen an altimeter unwind that quickly.

You’ll find Gulfstreams, Citations, Lears, Hawkers, and many other business jets used for signals intelligence, moving cargo, towing targets, medevac, oceanic patrol, search and rescue, and just about anything else you can think of.

Oh, and that airplane we saw on the ramp in Kona? A bit of internet research reveals that it’s called HIAPER (High-performance Instrumented Airborne Platform for Environmental Research) and is owned by the National Science Foundation. It took more than $81 million and nearly twenty years from conception to delivery. After Gulfstream finished building the airplane, it spent two years undergoing heavy modification and testing at Lockheed before entering service. That’s pretty typical, because adding sensors and pods often requires cutting holes in the pressure vessel, and that means the basic structure has to be re-engineered to ensure adequate safety. You’re taking an aircraft that was designed to do one thing and rebuilding it to accomplish a completely different mission.

The SOFIA airborne observatory.

The SOFIA airborne observatory.

I recently flew with a guy who was the test pilot for the SOFIA airborne observatory. It’s essentially a Boeing 747 retrofitted with a massive telescope in the tail. There’s a lot more to it than just clearing out the passenger seats and sticking some equipment into the fuselage. The cabin has to remain pressurized, but the telescope must be exposed to the open air. A new rear bulkhead had to be fabricated and installed for the pressure vessel, along with an 18-by-13 foot door for the telescope itself which was strong enough to open and close while flying at 41,000 feet and 500 knots. I don’t know much about the telescope, but the work that went into retrofitting the airframe is awfully impressive.

In a world of bespoke aircraft, the Special Mission variants take customization to a whole new level. Next time you see a business jet on the ramp with odd or exotic modifications, take a moment to appreciate the time, effort, money, and engineering that went into what is surely a one-of-a-kind machine.

How Far is Far Enough?

Monday, March 9th, 2015

There’s an old saying about fuel: unless you’re on fire, you can never have enough. I wonder, is the same thing true of an aircraft’s range?

With a 7,000 nautical mile reach, Gulfstream’s G650 was already an ultra-long range business jet before the ‘ER’ edition tacked on an additional 500 nm of capability. The G-series flagship recently set two records while flying around the world with a single fuel stop.

To be fair, Steve Wynn’s G650 flew eastbound from New York to Beijing and continued east to Savannah, Georgia for a total distance of 13,511 nautical miles. While that may satisfy the practical definition of the phrase, it doesn’t come close to the actual 21,600 nm equatorial circumference of the planet. Lest you think I’m picking nits, consider that you could fly “around the world” near the north pole with a Cessna 172 and do it on a single tank of gas. Get close enough to the pole and you could walk around the world in a few seconds. Doing so wouldn’t necessarily make you Superman.

Clearly, some kind of definition would be helpful. For the purposes of aeronautical records, a circumnavigation is considered by the Fédération Aéronautique Internationale to be a flight which a) covers a distance no less than the length of the Tropic of Cancer, b) crosses all meridians, and c) begins and ends at the same airport. In other words, the FAI’s criteria requires a minimum flight of 19,853 nautical miles, or 6,342 further than Wynn’s G650 traveled.

This is not to denigrate the G650’s achievement. They flew a long way, and did it at a high rate of speed — Mach 0.87. The city pair records it set on this trip will probably stand for a long time. But I can’t help but wonder, how much further could a person want to go? How much range is “far enough”? Since the globe is 21,600 nautical miles in circumference, one might be tempted to assume the answer is 10,800 nm. If airplanes were used to travel between random geographic points, that might make sense, but they’re using to travel between airports. Usually the ones near major cities.

One of the longest city pairs is Rio de Janeiro to Tokyo, about 10,000 nautical miles. Auckland to London is about the same. If that was the typical mission, the G650ER’s 7,500 nm range could still be improved upon by a longer-range airplane. But for the vast majority of pairings on our little blue marble, the ER can already do it on a single tank.

It seems to me that eking out those final miles may come at a steep price. Beyond the monetary cost, it would involve heavier weights, longer wings, the requirement for additional crewmembers, and so on. Even if the only thing needed was greater efficiency via winglets, incremental engine improvements, aerodynamic cleanup, and so on, it would still require vital resources like time and money — limitations every bit as real as the ones we face with smaller aircraft.

So should we expect to see longer range airplanes being developed, or will future emphasis be placed on speed and comfort? As always, the market will dictate the answer. Nobody develops a $60 million conveyance without extensive consultation with their client base. It’s worth noting that the G650 is such an exceptional product because it made significant strides in speed, range, and comfort simultaneously. That’s rare. By contrast, the upcoming G500 and G600 don’t break new ground in terms of speed or range, but do provide improved technology and most of the 650’s hallmark capabilities at a lower price point.

I’ve gone on record as predicting that the next big jump will be an increase in cruise speed — namely, a supersonic business jet. At the end of the day, that’s the ultimate goal: compressing time. Eliminating fuel stops is certainly one way to do it, but that only takes you so far. What comes next when the need to refuel is gone? Once the sound barrier is broken, the race will really be on. You’ll see officially recognized circumnavigations occurring on a much faster and more frequent basis, and business aviation’s value will rise exponentially.

The missing link in simulation

Thursday, October 31st, 2013

Several months ago I mused about the how ever-advancing computer technology has led to a marked improvement in simulators for the light GA market. After my post was published, reader Keith Smith alerted me to a corresponding service he had developed called PilotEdge. His company’s mission is to add a level of realism to the general aviation FTD that not even the multi-million dollar Level D boxes have thus far been able to offer.

I was intrigued. What could possible transform an inexpensive Flight Training Device that way? In a word: radios. As Keith said, “People use [simulators] for things they can’t easily do in the airplane because they lack real ATC and real traffic. If you had those elements, an ordinary end-to-end flight would now be beneficial in the sim, because it would more accurately model the workload associated with conducting the flight.”

That’s when it hit me: I’ve been training regularly in a full-motion Level D Gulfstream IV-SP simulator for a few years now, and despite the accuracy with which the cockpit, visuals, and motion are replicated, it’s never been exactly like flying the actual jet. I never spent much time thinking about why. Adding live air traffic control and filling the skies with actual traffic, operated by humans who spoke on the radio would completely revolutionize the experience, because for better or worse, pilots invest tremendous energy and attention on those two elements. We have to listen for our call sign, respond to queries, and interact with other people on a continual basis.

This isn’t about radio skills (although the service would definitely be useful for that purpose), it’s about workload. Keith related the story of a sim pilot who was so busy in the traffic pattern dealing with a Skyhawk ahead of him and a King Air on a three-mile straight-in for another runway that he failed to notice that he only had two green “gear down” lights.

The shower of sparks was impressive — but nothing compared to the look of horror on his face. He was sure he had confirmed the landing gear position. In fact, he heard the gear coming down and felt the vibration, but a badly timed call from the controller asking him to widen out on downwind distracted him and he never finished the checks. His radio work was perfect, but he failed to prioritize the necessary tasks. You couldn’t duplicate that without PilotEdge.

Bringing the workload closer to real world levels reveals chinks in the student’s armor; in fact, it’s exactly what instructors do with their students in real life: give them a heavy workload to see how they deal with the stress.

Imagine running an emergency in the simulator — say, an engine failure or depressurization scenario — and how much better it would be with a controller on the other end of the radio. You declare an emergency, and they start asking you about fuel remaining, souls on board, what are your intentions, do you need assistance, etc. That’s realism. It’s also a great opportunity to learn things a simulator normally never teaches you, like the fact that ignoring ATC is sometimes the best and safest option when you need to fully focus on flying the airplane. Imagine a copilot trying to read a challenge-response checklist to you in one ear while ATC is yammering away in the other.

Instructors using the PilotEdge service have a textual “back channel” to the controllers and can request scenarios like lost comm, a late go-around, poor vectoring, holds, and literally anything else a real controller would throw at you.

How It Works

The goal is 100% fidelity. ATC services are as realistic as PilotEdge can make them. They used the Freedom of Information Act to obtain SOPs for Southern California towers, approach control, and Center sectors. They also familiarize themselves with local airport customs by listening to The sim controllers are paid by PilotEdge and use the same phraseology and procedures utilized by FAA-certified ATC specialists.

But “live” ATC is not very realistic if you’re the only one in the sky. So PilotEdge uses what they call “traffic shaping”. Rather than merely hoping for traffic, they coordinate actual pilots with simulators in remote locations to be at the right place at the right time flying a specified route to create that traffic. And they’re on the frequency as well. Listening for your call sign is something you have to do as much or more in the simulator than you’d be doing in real life. You’ll wait for departure, get stepped on during transmissions, and do all the other things that would happen in a real airplane.

PilotEdge’s service area covers Southern California. Some of their traffic is live, while the rest is computer-generated. PilotEdge has 400 drones flying around the area at all times in Echo and Golf airspace, squawking 1200 and not talking to anyone. They’re programmed to fly exactly as real-world “non-participating” targets do. They’re in the VFR practice areas, the Palos Verdes aerobatic area, and so on. They have military aircraft flying at high speed on military training routes, light GA aircraft on multi-hour cross-countries, gliders (again, without a transponder) flying ridge lift off of Warner Springs and around Mojave, etc.

Here’s a three minute overview of the PilotEdge service:

The Genesis

I’d never heard of a service like PilotEdge before, but Keith said they are not the only one providing ATC services for simulators. The difference is, the “other guys” are using voice-recognition software limited to prepackaged scenarios rather than a room full of human controllers who can deal with — and dish out — anything you can dream up.

Keith Smith started with an early internet-based attempt at simulating air traffic control called VATSIM, which began by using text and later went to Voice-Over-IP.

“That’s where the idea came about; I was a controller there for seven years or so. It’s got lots of flaws for commercial use, but it was the genesis. I couldn’t convince other pilots to use VATSIM due to technical difficulty, so I built PilotEdge from the ground up, licensed the radar scope technology, and off we went.

The radio source code is fairly complicated, but beyond that the service is more evolutionary than revolutionary. Technology is not the key. The secret is our operating model: ATC services provided fifteen hours a day, no requirement for scheduling in advance, and it’s just like the real ATC system.

Also, VATSIM strictly prohibits commercial use, whereas we are built for that purpose. Once a fee is charged, a volunteer service like VATSIM gets complicated. Who gets paid and who does not?”

I asked him how the reception has been for PilotEdge. “It’s a tricky question to answer. It depends on the market. Right now we’re sitting at around 400 users and we’ve been there for 3-4 months. We bring some flight schools on, others drop out. The middle of the market has not been strong, but relationships on the upper-end have made up for it. But we’re a small company, only two years old and definitely still a start-up as far as funding goes.”

A PilotEdge air traffic controller working the "virtual" tower cab at Long Beach (LGB) Airport.

A PilotEdge air traffic controller working the “virtual” tower cab at Long Beach (LGB) Airport.

On the light GA side, PilotEdge is about building radio skills and proficiency at a low cost. With the price of flying spiraling upward at an alarming rate, it’s getting too expensive to operate a real airplane just to build mastery of radio communication.

Even so, it’s been hard for PilotEdge to get much traction with the prototypical flight school. These FBOs tend to be run by people who are overworked. Changes to their programs — especially if it’s an FAA-approved Part 141 syllabus — are difficult to make, and the main emphasis for these companies is keeping the leaseback airplanes flying. Likewise, instructors need to build time, so they want to fly, not sit in a simulator.

Keith feels he’ll be most successful with home users and corporate training centers, because all they do is simulation. The center of market is going to be soft because simulation is not as mature there (although that’s starting to change due to the Redbird Effect).

Expansion on the Horizon

Chicago Jet Group recently obtained an STC to put CPDLC (Controller-Pilot Data Link Communication — basically ATC via text) into Falcons and Gulfstreams, and they contacted PilotEdge to help provide training. VATSIM started with text-only, so it’s an easy transition. Keith said anyone who worked with VATSIM would feel right at home.

I wondered if PilotEdge would ever expand their service area beyond SoCal, and he responded by saying that airspace is airspace, but if the need arose, sure. They picked ZLA because there are simple, moderate, and highly complex areas around SoCal. Keeping the service area restricted increases density of traffic and that congestion helps training and realism. Having said that, there is a company looking to provide PilotEdge service for the New York area because they have a commercial contract to fulfill for that region.

The brass ring for a company like PilotEdge is, of course, the major training centers like Simuflite, FSI, and Simcom. Even NASA has shown an interest.

They’re already making some inroads there via a partnership with ProFlight LLC, a Part 142 training facility in Carlsbad, CA. Founder Caleb Taylor has deployed PilotEdge in their simulators and is basing their business model on that service. Their goal is not just recurrent training, but continual training where pilots can come in any time at no cost and use the device, solo. Well, if it’s used solo, there’s no instructor pretending to deliver ATC (badly, in most cases). So, enter PilotEdge.

Additionally, during ground training, where simulators are not generally used until after classroom training is complete, they want to use their $6 million sim as a training aid. Students will jump in the cockpit and practice using all the systems, including the FMS. There, too, ATC has a role. Lastly, students enter the flight training portion of the formal initial or recurrent program and log their sessions with an instructor. But they will be encouraged to follow up with a bunch of solo sessions, again, with PilotEdge.

All Roads Lead to Savannah

The PilotEdge virtual air traffic control center set up at the 2011 Airventure show in Oshkosh.

The PilotEdge virtual air traffic control center set up at the 2011 Airventure show in Oshkosh.

Keith knew that I fly Gulfstreams for a living and mentioned that they’re working with the folks in Savannah as well. Of course, that piqued my curiosity pretty quickly. He said that Gulfstream is using PilotEdge to save on certification costs related to the avionics in the G650. They’re developing the first FMS update for that airplane, and traditionally the human factors certification takes place in the actual jet. That’s expensive. Operating a G650 costs thousands of dollars per hour. PilotEdge allowed them to move that work into a simulator with full FAA blessing.

“We’re a small company nobody’s heard of, but the Gulfstream project got us in the door at FlightSafety. But even then, they were under the impression that it was voice recognition software, a synthetic product using rigid scenarios.”

It’s Not Just for Pilots

PilotEdge can work in reverse, too. Sacramento City College trains controllers before they go to Oklahoma City for formal coursework with the FAA. They setup a lab with simulators and use PilotEdge to get trainees a leg up on the intricacies of keeping a flurry of flying aluminum sequenced and separated.

Keith said they just put together a proposal for the Mexican Navy as well. Again, competitors use voice recognition software, but that technology doesn’t scale easily when the language in question is Spanish rather than English. He said PilotEdge’s pricing is also superior.

Speaking of English, no matter where you go — and I’ve been on virtually every continent — controllers and pilots are supposed to be capable of communicating in English. There’s no other way to ensure a pilot whose native language is Portuguese can talk to a controller in China who’s primary tongue is Mandarin. So a huge aspect of the international training market is dictated by the ICAO Level 6 English requirements. That regulation has teeth to it, and everyone’s struggling to get their people up to speed. Guess who can help with that?

The Bottom Line

I’m frankly a little surprised that nobody’s come up with a service like PilotEdge before Keith Smith and his team made it happen. As previously noted, the requisite technology has been with us for many years. In some ways PilotEdge is almost anachronistic. From manufacturing to fast food, industries are moving toward greater automation and a lower employee count. PilotEdge is doing the exact opposite, supplanting automated ATC simulation with live humans. Not that I’m complaining, mind you. I’ve had the misfortune to interact with a couple of these computerized programs in the past and always come away wishing I could get the last two hours of my life back.

The combination of a new generation of simulators and PilotEdge’s addition of air traffic and ATC has the potential to vastly improve the way pilots train while simultaneously reducing the cost of obtaining everything from a sport pilot certificate to a turbojet type rating. I can see this powerful duo creating an aviation equivalent of the smartphone explosion and helping turn the tide toward a more prosperous future.

Perhaps evolutionary is revolutionary after all.