Two Ultralighters Remember the World Trade Center Towers

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NY skyline

Attack on America

Ben Cole took this photo of Manhattan Island, New York as he flew his single-seat Stingray up the Hudson River in late July, 2000. The twin World Trade Center Towers that once dominated the Manhattan skyline are now but a memory.

Ultralight Flying! magazine joins with America and the rest of the world in expressing great sorrow and outrage at the September 11 terrorist attacks on New York City and Washington, D.C. The attacks completely destroyed the twin towers of the World Trade Center, and did incredible damage to the Pentagon. The loss of life is incomprehensible.

September 11, 2001 was the day terrorists flew two hijacked passenger-carrying jets into the twin towers of New York City's World Trade Center, and a third was crashed into the Pentagon in Washington, D.C. A fourth hijacked jet crashed in western Pennsylvania, evidently short of its undetermined target. It's a date Americans will always remember.

These outrageous acts of terrorism shut down the national airspace system (NAS) in America for the first time since World War II. Most commercial operations have resumed. Most VFR operations, including ultralight flight and ultralight training, have resumed (see for the most current information).

While the aftermath of these events dominate the news, Ultralight Flying! magazine remembers the grandeur of the World Trade Center's towers and the people who occupied them through the eyes of two ultralight pilots who had the privilege of flying their ultralights by these American symbols of power and freedom.

In June '88 Roland Alexander flew his amphibious ultralight Buccaneer from Florida up the East Coast to Maine. One of the excursions he made en route was down the Hudson River in the special VFR corridor created for small aircraft operations.

"When I was planning my flight up to Maine, I thought I'd just skirt the Statue of Liberty and continue flying up the Eastern Seaboard," says Alexander. "A friend of mine, who is from the New York City area said, 'You've got to fly up by the Hudson River by the towers of the World Trade Center. It's a sight you'll never forget.'

"And he was right. When I reached New York City, I flew around the Statue of Liberty then headed north up the Hudson River for about 10 miles before turning around and heading back. The WTC towers were huge, perfect square pillars and I was so close to them.

"It's hard to imagine those magnificent towers are now gone."

For pilot Ben Cole, who spent July and September in '00 flying his single-seat amphibious Stingray through 49 states, the privilege of flying up the Hudson River will always be remembered.

"I actually flew closer to the World Trade Center towers than the Statue of Liberty," Cole recalls. "This was the procedure. I left New Jersey, you had to be over 500 feet and under 800 feet, and you had to be on the right side of the Hudson River if you were going north. You don't even have to talk to the controllers. You have to have a transponder and squawk 1200 and you have to announce your progress. 'This is 249 Bravo Charlie crossing the Verrazano Narrows Bridge at 600 feet. This is 249 Bravo Charlie passing Governors Island at 700 feet.' And you'll hear other people, mostly police helicopters, sightseers or news helicopters announcing, 'This is police chopper so-and-so abeam the Lady,' (that's the expression they used, meaning they were flying by the Statue of Liberty)."

Once Cole skirted the Statue of Liberty, he flew up the Hudson River.

"The World Trade Center towers dominated the skyline on that part of the Hudson River," says Cole. "They were giant glistening towers that were absolutely beautiful. They were so tall, the wind currents through there created a good bit of turbulence.

"They were perfectly square - so simple yet so dominate, so inspiring. They were just a different dimension as far as the other buildings go. Everything else around there - the Empire State Building, the Chrysler Building - were all the more traditional architecture, but these were just so distinctive. They were like the pinnacle of the architecture in New York City. They were close to the water and it just didn't seem like the ground could support them, they were so tall and massive.

"When I flew by the towers, I was probably flying at 700 feet and they were towering above me another 400 feet. I remember looking over at them and thinking, How many people are watching this little airplane go up the Hudson River. I wonder what they're thinking.

"The towers just stood there like silent sentinels. They were all-glass wonders, highly reflective."

The act of crashing two jetliners into those towers "is a watershed moment in American history," Cole says. "I haven't broken down and cried since I was a kid, and when I saw those buildings come down, I teared up. I couldn't stand it. I was watching TV, the planes had hit, the commentator was talking about something else and this building just collapses. And I'm thinking, Thousands of people just died.

"I was stunned. It just seemed incomprehensible."

No doubt, along with many other repercussions, these terroristic acts have affected the way we aviate in America, both commercially and recreationally. The future will show just how much American aviation has been and will be affected.


Electrical System Safety

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There are ultralights being flown that do not have an electrical system with a battery which allows you to have a starter, anticollision lights, radio and all the other good things that system provides. I have noticed a significant difference between the electrical system used in automobiles as compared to boats and airplanes. Automobiles have no master switch. No. The ignition switch is not a master switch. All airplanes and some boats with inboard engines generally have a master switch.

What is the master switch, you ask? The master switch is the first switch on the checklist for starting. It "turns on" the battery and all the power for the electrical systems except ignition, which is powered by the magneto. The master switch actuates a solenoid, which has large contacts capable of handling the current needed by all the electrical systems and the very high current required by the starter. In short, it connects and disconnects the battery to the airplane.

Automobiles don't have such a thing and seldom need to. Aircraft need them because there are times when your safety will depend upon it. I will cite some examples I have been a part of. A Cessna 150 was returning from a cross-country flight when something happened to the power system. It was evening and the pilot (grandson of the plane's owner) turned on the landing lights, which went on momentarily and then went out. A short-circuit condition was suspected. He decided not to turn on the radio but flew the pattern and made sure it was safe for him to land. Fortunately it was an uncontrolled airfield without much traffic at that hour. After landing he found that the landing lights were blackened from being burned out and the fuse was blown.

The next day I was called by the A&P mechanic to find out what happened. I suspected that the voltage regulator had failed, so we started the engine and checked the voltage of the generator at the battery terminals, which showed 16.5 volts. The mechanic opened the battery box and the battery was found to have been boiling so there was a clean-up job to do. Usually the voltage regulator fails by low voltage output, but this was a high-voltage condition.

"Why didn't the fuse protect the landing lights?" the mechanic asked. When the landing lights were switched on a large current flow, resulting from the excessive voltage, surged through the filaments of the bulbs so quickly the fuse blew as the bulbs blew. An interesting aside: The tungsten filament of a bulb, when cold, has a low resistance such that the initial instantaneous current is from 8 to 10 times the steady state current. Bearing that in mind you can understand why everything burned out in a flash.

If the plane had a generator switch and a voltmeter, the pilot could have identified the problem and turned off the generator. Then he could have used the radio and landing lights from battery power. Some larger planes have a generator switch and voltmeter but the little ones don't. Luckily the only other thing that got burned out was the directional gyro.

Some months earlier, on this same plane, smoke was detected in the cabin. Fearing the possibility of fire the master switch was turned off. Later a short circuit was found. Usually this condition causes the circuit breaker or fuse to blow, but sometimes that doesn't happen. At those times it's nice to have another means of cutting off the electrical power.

Here is one that happened to me. In starting my ultralight one day the contacts in the starter solenoid welded closed. With the engine turned off the starter kept on spinning the engine over. I had wired my machine like an automobile so the only thing I could do was to break the battery connection. Knowing that the certified aircraft's master solenoid was rather expensive, I looked in a catalog for boat supplies and there I found a look-alike without a metal case but having all the power-handling capability I needed and more. To give you some idea of what it is capable of, its label says it is rated to handle 65 amps continuous and 750 amps for 10 seconds.

What is the downside, you ask? Its weight is a little less than 1 pound. Sure it requires some current to keep it closed but that is only .66 amps, about the same as a small light bulb. Not bad for what it can do. Also, you have to remember to put it on your checklist to be turned off during shutdown because if you forget, the next time you are going to fly, the battery will be discharged.

If your radio or other electronic equipment is turned on when you are turning off the master switch, the diode is necessary to suppress the high voltage kick that occurs when the actuating coil is turned off. The idea is to protect semiconductors from the resulting voltage transient that can puncture them. If you don't have semiconductor devices in the system, the diode can be left out.

If your local marine equipment supplier doesn't have this item, contact: Cole Hersee Co., 20 Old Colony Ave., South Boston, MA 02127. Phone: (617) 268-2100 (ask for part #24117-01).

Arnold C. Anderson has been flying ultralights since 1982, logging more than 300 hours in his Kasperwing. After 37 years in the engine and aerospace industry as a mechanical engineer, designing electro-mechanical equipment and solving reliability problems in equipment for unmanned deep space missions, Arnold is now retired. He lives in Bellevue, Washington, where he pursues his hobbies, including aerial photography and flying RC airplanes and gliders.


Flying Cross-Country

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One intent of the Federal Aviation Administration (FAA) in approving ultralight flying was to allow pilots to enjoy flying at low speeds, and to limit the range to a distance that is long enough to make the flight interesting but not so far as to cause a pilot to get lost and in real trouble. As a result the fuel load on an ultralight was limited to 5 gallons of gasoline.

Recalling my first long-distance flight through country that was unfamiliar to me, I prepared early for the flight by using the principles of pilotage that I had learned so many years ago in ground school. Because my Kasperwing ultralight is open to the elements I could not carry a marked chart in my lap; I had to do the next best thing. On a 3- by 5-inch card I noted my compass headings and described each checkpoint with the time I would arrive.

Because of a restricted TCA that extended to ground level, I indicated my turning point and new compass heading, then continued on with more landmarks. I carried the card in a handy pocket that I could reach while scrunched in my seat. Just before taking off, I started my flight timer (the stopwatch feature on my wristwatch). Then, immediately after exiting the pattern took my first compass heading.

All of this preparation paid off because later in the flight, smoke restricted my visibility to about 2 or 3 miles. But I still hit my checkpoints spot on, made my way to my destination and returned without anxiety. By the way, I made a separate card for the return flight.

Pilots who fly certified aircraft that travel at higher speeds and carry an abundance of fuel may be cavalier about pilotage and depend on their GPS. In spite of their ground school training some pilots make no preparation and elect instead to follow highways and go IFR, which is defined as "I follow roads." That is okay but I just feel better knowing where I am all of the time and be prepared to cope with any problem that may be encountered along the way.

Many times I have flown my Kaserpwing 50 miles on 5 gallons, which is not an outstanding achievement, except when there is a headwind. Still, it is a long way from home. A change in the weather always prays in the back of my mind even though I try to limit myself to reasonably stable weather conditions.

So what do you do when the weather throws you a curve such as what happened to a buddy of mine? On his way home he flew through a front that had no visual indication of its existence. My friend suddenly found himself dropping about 1,000 feet followed by severe turbulence. He was about 10 miles from home and pressed on to land at his private strip, which had a cliff on the approach and sloped uphill thereafter. At about 500 feet from touchdown he suddenly dropped and faced immediate disaster with the cliff facing him. With power and hard up elevator, he got down without damage but was shaken by the experience and his near crash. What should he have done? Was there alternative action that he could have taken?

In questioning older, more experienced pilots, their response was the same: Yes there were alternatives. The first was to turn around and go back through the front into stable air and return to his starting point. If that was judged as being too far, he could have flown to an alternate field that had a longer and wider flat runway. Here he would have more forgiving conditions. It is true that unexpected sink can be experienced at any airport but with the aid of a radio, one can get valuable information concerning conditions at a given field.

There seems to be a universal tendency among some pilots and especially relatively inexperienced pilots, to press on in order to get home. Why risk injury or damage to your machine? Either of these takes a long time to fix, not to mention expense. Don't be too proud to turn back. Wait it out and try again later.

Arnold C. Anderson has been flying ultralights since 1982, logging more than 300 hours in his Kasperwing. After 37 years in the engine and aerospace industry as a mechanical engineer, designing electro-mechanical equipment and solving reliability problems in equipment for unmanned deep space missions, Arnold is now retired. He lives in Bellevue, Washington, where he pursues his hobbies, including aerial photography and flying RC airplanes and gliders.


Anticollision Lights and Electrical Radio Noise

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At some point in flying, the possibility of in-air collision should become an important consideration. The installation of strobes or pulsing incandescent lights will most certainly give you additional security.

In getting serious about this, let's first look at where one should put strobes. Certified airplanes usually have a rotating beacon on top of the rudder, but that is not visible from below so a strobe is often placed on the belly as well. These are turned on during the day. At dusk the navigation lights are turned on along with the anticollision lights.

We should install our anticollision lights so at least one light can be seen from any direction. If strobes are placed in the outer edge of the wing tips, that goal can be met with only two lights. Of course the other alternative is to place the lights above and below as on certified airplanes, but if that doesn't satisfy your concern you can do both.

Flashing lights of any type have to be a safety benefit. Tests that I have evaluated indicate that a pulsing quartz halogen light is more visible in bright daylight than a strobe. The best pulse appears to be about 1 second on and 1 second off in duration. Strobes appear to work best at night but we don't have to concern ourselves about that because ultralights aren't permitted to fly at night. Ultralight flight is permitted 30 minutes before official sunrise and 30 minutes after official sunset, provided the ultralight has anticollision lights.

One problem with these types of lights is the likelihood of radio frequency interference (RFI) - the result of the pulsed power that surges to the lamp or strobe. The pulse is in the form of a square wave incorporating some very high frequency components that can be picked up by the antenna on your transceiver. You will be subjected to a pop in your headset each time the light flashes on. The interference is easily avoided if some simple precautions are followed.

The circuit to your lights or lamps should not depend upon the airframe for its ground connection. The lights must be wired all the way from the pulse source to the lamp or strobe. There is no need to purchase some super coax cable for this purpose. Regular well-insulated tinned copper wire will do very well.

The trick in eliminating RFI is to twist the wires together. The amount of twisting is important. Ideally the wires should be twisted so there is about one twist per inch. This reduces the power of noise radiated as RFI by 10,000 at 100 Megahertz, and that is a lot of shielding. Higher frequency components of the pulse are attenuated even more. As compared to the noise from your ignition, it is essentially zero interference.

Now we come to our next subject - ignition noise.

This problem is eliminated on certified aircraft by shielding the ignition wires with metal braiding, and then grounding the braid. That may or may not work on your ultralight. I made up a set of shielded wires for my engine and found I couldn't fire the spark plugs. My engine is fired by a capacitance discharge ignition (CDI) system, which produces one pulse with high frequency components in its wave. The shielding, in conjunction with the wire insulation and the wire going to the spark plug, formed a capacitor. The capacitance, though small, shorted out the pulse to ground. This I found out a good deal later from an electrical engineer, who was versed in that sort of thing.

I had to find an alternative means of cutting down the fierce spark noise in my radio. I didn't want to use resistance wire because it has a way of deteriorating with use. Most resistance wire uses a nylon string that has been loaded with graphite as its current conductor. In time the spark current causes the graphite to sublimate (evaporate away), the resistance goes up and the engine will start to miss, especially at high power settings. Not good.

I tried various noise-suppression caps and finally I found one that would do the job satisfactorily. Of course it was the most expensive one so it is no wonder. The best cap I was able to find is a Bosch, part number 356-351-032 marked as having a 1K-ohm impedance. To be sure it doesn't cut out all of the spark noise but by turning up the squelch on my transceiver, it works just fine. The only time I hear any spark noise is when I have an incoming signal, but it is at an acceptable level.

If there is anything better out there I would like to hear about it.

Arnold C. Anderson has been flying ultralights since 1982, logging more than 300 hours in his Kasperwing. After 37 years in the engine and aerospace industry as a mechanical engineer, designing electro-mechanical equipment and solving reliability problems in equipment for unmanned deep space missions, Arnold is now retired. He lives in Bellevue, Washington, where he pursues his hobbies, including aerial photography and flying RC airplanes and gliders.

Engine Additives in Ultralights

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It seems that since the very beginnings of development of the internal combustion engine people have been coming up with fuel and oil additives designed to make more power or extend the life of engines. In the early times, it was said that auto racers would put mothballs in their fuel tanks to get more power. The mothballs were supposed to dissolve in the fuel and give more punch. Since that time, other additives have been developed. Some of them were very effective, such as Tetraethyl lead, which was used up until recently when it was determined that it was poisoning the earth. Oil companies were always coming up with an exotic material. One time it was some mysterious stuff called Platformate, then it was boron. They all have mostly fallen by the wayside and now we are getting plain ol' gasoline.

In looking at the shelves of your local auto parts store, you can find a number of oil and gasoline additives. The oil additives with which I am familiar either make the engine oil have a higher viscosity or have some solvent property intended to clean up varnishes in the engine. When I purchased my first new car many years ago, the service manager tried to sell me an additive. He said that after a quart of the additive was added to the oil, they would run the engine for an hour, then drain all of the oil and drive the car 100 miles after which it would run perfectly fine.

I had just graduated from college and had studied engine design in addition to spending considerable time in the engine laboratory. I wanted to ask the critical question: Did they disassemble the engine and inspect it for wear or damage? Also, did they prepare an engineering report describing the test signed by the person in charge of the test?

I let it pass because whenever I've asked one of these suppliers of oil additives for an engineering report on tests run in a laboratory under controlled conditions, the results are disappointing.

The conclusion of all this is, don't deviate from what your engine manufacturer recommends. There is little doubt in my mind that in 4-stroke engines the new synthetic oils are superior to the basic petroleum oils. But my advice still remains, follow your engine manufacturer's recommendations. When it comes to 2-stroke oil, I am convinced synthetic oil is the only way to go. I don't believe any 2-stroke engine manufacturer recommends anything but synthetic 2-stroke oil. It burns cleaner and provides better lubrication at high temperatures and does not require a large quantity per gallon.

Oil in gasoline displaces fuel and burns slowly so it does not provide significant energy to the piston. Before the development of synthetic oils, early 2-stroke motorcycle racers would reduce the amount of oil in the gasoline and the result was more power. One regional champion told me that he ultimately went to 100:1 in his fuel-oil ratio and would win races. In the process, he sacrificed the engine but he would win races. The motorcycle manufacturer sponsored him so the ruined engine was no great loss. He would also do such things as use only one ring on each piston.

What I'm leading up to is this: Whatever you add to your gasoline it is very likely going to reduce the amount of power available to your engine's output. Yes, even alcohol reduces available power. Alcohol has a lower energy content than gasoline.

The question of fuel stabilizers comes up from time to time. For boats or power generators that sit for long periods of time between uses, the manufacturer often recommends a stabilizer. But your ultralight shouldn't have this problem. Every time I fly I usually burn more than half of the fuel in the tank so I am always adding fresh fuel. When winter comes and I quit flying, I drain the remaining fuel and put it in my old truck that doesn't require any special consideration. Of course, I do one more thing. With the fuel line disconnected I run the carburetors dry.

As a final note, if FAA hasn't approved an additive for certified aircraft, then it probably should not be considered acceptable for your ultralight.

Arnold C. Anderson has been flying ultralights since 1982, logging more than 300 hours in his Kasperwing. After 37 years in the engine and aerospace industry as a mechanical engineer, designing electro-mechanical equipment and solving reliability problems in equipment for unmanned deep space missions, Arnold is now retired. He lives in Bellevue, Washington, where he pursues his hobbies, including aerial photography and flying RC airplanes and gliders.

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