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One of the first questions a student pilot asks me when starting the cross country portion of his or her training is, how do I know what altitude is best for my flight?  This is a good question, because without taking certain aspects of the flight into account, it’s really just a crap shoot when selecting an altitude.  Craps and flying don’t mix, so let’s take a look at a few considerations when selecting an altitude.

Sky Coverage

Sky coverage has several subcategories when it comes to selecting an altitude.  First is how high are the bases?  Is it IFR (VFR pilots would be grounded), marginal VFR (1,000 AGL to 3,000 AGL ceiling), or good VFR (above 3,000 AGL ceiling)?  If the cloud deck is only 2,500 feet off the ground, then VFR pilots are limited to either 1,000 AGL to 2,000 AGL.  This is an excellent segue into why VFR pilots shouldn’t scud run!

Second, what kind of cloud deck is it?  Is it an actual ceiling (broken or overcast), or is it a scattered layer?  Few or scattered layers usually allow VFR pilots to find a hole to get higher to some smoother air, making the flight more pleasant.  VFR pilots, always make sure to check the destination weather as it could be scattered where you are departing from, but it might be broken or overcast where you are arriving.

Last, how high are the tops of the clouds?  Pilots can only get this information in the planning stage from the area forecast or from pilot reports, so most of the time, it’s not very precise information.  If the tops are at 10,000 feet and the pilot is flying a 172 on a 30 mile trip, it doesn’t make much sense to get on top of the clouds.

Terrain and Obstacles

Terrain goes hand in hand with sky coverage.  If there are low clouds and high terrain, that doesn’t bode well for trying to stay VFR and not hitting anything.  Obstacles need to be taken into account too, as there are some pretty tall radio towers that can stretch up into a 1,500-2,000 AGL deck of clouds.

Winds Aloft

Once the sky coverage and terrain have been considered, it’s time to look at the winds aloft.  Tailwinds are preferred, but, sometimes, a headwind is the only option.  After taking the clouds and terrain into account, this narrows down your altitude to a handful of options.  The winds aloft will further narrow it down.

Aircraft Performance

Once you have two or three altitudes in mind, taking a look at the performance charts for your airplane will help nail down that final altitude.  Pull out the POH, compare fuel burn and cruise speed, and you’ll have your altitude selected.

It’s summertime and the weather is hot! Over this dry, sunny season, winter flying is probably the last thing on your mind. However, now is the perfect time to start getting things in place for winter and that includes having a plan for taking care of your airplane.

Why are preparations for winter ops needed in the first place? Cold weather, especially during the engine start and warm up period, can be very damaging to your engine if precautions aren’t taken to ensure that safe temperatures exist inside the engine before you turn the key. I always thought that the biggest problem associated with cold weather was engine oil. The logic is since cold oil is thicker and less viscous as the temperature drops, it is not able to circulate quickly throughout the engine to provide proper lubrication upon starting.

While cold oil may be a factor, the introduction of multi­viscocity oils has greatly reduced that issue. The real problem is created by the different ways that various parts of the engine respond to heat. Because aluminum expands more quickly when heated than steel does, the pistons (made of aluminum) expand more quickly than the cylinders (made of steel). This can lead to scuffing on the sides of the cylinder barrel. In the same way, differential heating can reduce clearances which are designed to provide cooling oil to bearings and other vital engine parts, thereby causing damage which greatly reduces the life of the engine.

So how cold is TOO cold? Unfortunately, that is a difficult question to answer. Because there is so much variation between engines, airplanes, and environments, there really isn’t any one specific answer. An older, more worn out engine may actually be less susceptible to cold weather damage than a newer, tighter engine because its internal clearances are probably not as tight as they were a few thousand hours ago. I have heard of some people who preheat their airplanes anytime the temperature falls below about 40 degrees. For us northerners, this seems excessive. On our E33A Bonanza which has a Continental IO­520, we generally preheat the airplane when it is cold soaked in temperatures below freezing (32° F).

Here are a few of the best ways to get your machine ready for a cold weather flight:

• Heated Hangar:­ Nothing beats a heated hangar for warming up an airplane. The warm air is evenly distributed around the engine and in the cockpit (your avionics and gyros will thank you!). The airplane will need to be in the hangar for a while in order to warm up the guts of the engine. Often, the easiest way is to have the airplane pulled in the evening before the planned departure and left overnight. Many FBOs will hangar airplanes overnight for a small fee and it is well worth the price. We almost always have our charter airplanes put into hangars overnight when on a winter trip to ensure that we don’t have any trouble when we depart the next day. This practice has the added benefit of keeping the airframe clear of any ice and snow that may accumulate before you are scheduled to leave.
• Electric Engine Heaters­: Multi­point electronic heaters use heating pads that are placed around the engine in order to heat up the various components such as cylinders, the oil pan and crankcase. Most of these systems are designed to be activated by being plugged into a wall outlet with an extension cord. Preheating for a winter flight is as simple as going to the airport the night before and plugging it in. Two well ­known manufacturers of multi­point engine heaters are Reiff and Tanis. These systems are relatively inexpensive and can be a life saver if you regularly travel in colder climates. If an engine heater is the right choice for you, it is recommended to avoid less ­expensive models that heat only the oil pan.

Pictured above is the Reiff system. The heated bands go around the cylinder bases and the pad at the bottom of the picture heats the oil pan. Picture Courtesy of www.reiffpreheat.com

• Covers and Blankets­: If it is especially cold or you have to preheat outside, having something to insulate the cowling and keep the wind out can be very useful. Regular blankets will work long as you can secure them in place. If you have an ongoing need for additional insulation, there are companies that make custom blankets and propeller covers to fit your airplane. If you are landing and then taking off again relatively quickly, using a few blankets and cowl plugs will work nicely to keep the engine warm while it is sitting outside. In a pinch, placing a couple of powered light bulbs in the cowling overnight with insulation on top can result in sufficient temperatures for starting the engine.

Even with the multi­point electric heater, we still use a blanket while preheating to help keep everything toasty.

• Forced Air:­ This method is used widely by FBO’s and flight schools. Hot air is produced in a portable heater and is then pumped into the engine compartment via the openings at the front or bottom of the cowling. This method has the benefit of not requiring any additional equipment to be installed on the aircraft beforehand and can be very effective provided there is adequate time for the engine to heat completely before removal.

Pictured above is a Red Dragon engine preheater. Photo courtesy of Red Dragon’s website: www.flameengineering.com

• Winter Baffles:­ When the air temperature starts to drop into the teens and lower, you may find it difficult to keep your engine temperatures warm enough in cruise flight. The problem is that the air entering the cowling inlets is so cold that it overcools the engine. The solution is to install additional baffling in the engine inlets to reduce the amount of airflow into the cowling. These additional baffles are usually just sheets of aluminum that are cut to the correct size and are bolted in and removed quickly and easily as needed. Some pilots swear by them while others complain that they can cause uneven cooling. If you have questions about winter baffling, I’d suggest talking to your mechanic about your specific airplane.

Winter flying can be extremely rewarding. After their hands thaw from pre­flight, a pilot is often rewarded with smooth air, improved performance and outstanding views. Just don’t forget to prepare the airplane for the cold. The preparation is often as simple as plugging in an extension cord or making a phone call to the FBO. So whether you live in the north or the south, take good care of your engine so that it can keep taking good care of you.

Skyvector has changed it’s look.  The aeronautical chart website is now offering flight plan filing capability. In order to gain the ability to file flight plans, the user has to form an account first.

Personally, I really liked how Skyvector had a simple interface before they changed.  As an instructor, a lot of times, I go to multiple airports on one flight.  It was really nice to just plug in airport IDs to check distances and heading information on Skyvector.  The new format is a little clunky as the website has made it a little more difficult to do what it did best before.

Did the aviation community need another venue to file flight plans?  Not with Foreflight, Garmin Pilot, and WingXPro leading the way in the app market.  Skyvector was smart in not trying to develop another app to compete with the big boys.

Will the new Skyvector last?  We’ll see.  I’m hoping they’ll go back to the way they used to be, but we’ll see. I may use it enough to come around to liking it.

L-3 has jumped into the ADS-B transponder game with their Lynx line of products.  Aircraft owners have a myriad of options with the Lynx line, from simply becoming ADS-B compliant with the NGT-1000 ($2,100, with ADS-B out that works with the GTX 327 and GTX 330), or going all in with the NGT-9000 touch screen transponder complete with ADS-B In, a traffic screen and NEXRAD ($6,800).

The NGT 1000/2000/2500 line works with the existing transponder in the airplane (as long as it’s a Garmin GTX 327 or 330).  The 2000 gives ADS-B In capability, allowing the pilot to access NEXRAD and traffic, plus has a Wifi source to broadcast all the information to an iPad.  The 2500 includes all of that, plus gives the pilot MFD capability as well.  An optional control panel is available if the airplane is not equipped with one of the aforementioned Garmin transponders.

The L-3 Lynx NGT-9000 is an actual transponder replacement.  It is a touch screen device that has a multitude of ADS-B features that, quite frankly, are really cool on a transponder.  The ADS-B traffic is displayed on the unit itself and can also be sent, via the optional Wifi connection, to an iPad on the WingXPro or SkyRadar apps.  The optional L-3 NextGen Active Traffic can also be installed to receive traffic callouts (this does not include resolution advisories).  Already have SkyWatch?  The L-3 Lynx can use the equipment.

The L-3 Lynx NGT-9000 is also capable of displaying NEXRAD as well as METARs, TAFs, NOTAMs, and TFRs and a myriad of other weather products, all on it’s moving map.  It seems that L-3 has taken the transponder and turned it into something awesome.

To read more about the L-3 Lynx line of transponders, you can visit their website.

Whenever I get in an airplane with a pilot for recurrent training, I can assure myself that I will mention rudder usage more than once during the flight.  If it is in a tailwheel (or if the pilot is doing tailwheel training), I’m going to mention the rudder a lot.  How do I know this?  Because basic rudder skills are actually one of the most difficult things to master in flying.

Let’s start simple.  What does the rudder do?  The dictionary definition is it controls the movement about the vertical axis of the airplane.  If you stick a pole down through the CG of the airplane and rotate the airplane around that pole, this is the vertical axis.  Looking at it another way, the rudder moves the airplane’s nose left and right.  Keep this in mind as we move on.

Every pilot thinks about the rudder during the takeoff roll.  Because of the torque effect, the pilot must add right rudder during the takeoff roll to stay on the runway centerline.  Depending on the airplane’s horsepower, more rudder pressure is needed in higher powered airplanes.  The problem usually shows up once the airplane gets in the air.

In the worst situation, after takeoff, the pilot will set both feet on the floor and completely disregard the rudder.  Torque effect and now P-factor are continuing to cause the airplane to yaw left, causing the need for right rudder.  With his feet on the floor, though, the pilot is allowing the airplane to yaw.  It’s not terribly noticeable for him in the front seat, but the back seat passengers (especially in a six seat or larger airplane) are certainly feeling it.

One particular problem spot on the climb is the climbing left turn.  In a climbing left turn, training says to add left rudder since it is a left turn (see below for the reasoning).  But, since the airplane is climbing and therefore experiencing left yawing tendencies due to the aforementioned effects, the pilot needs to continue pressing the right rudder, though the pressure won’t be as much as in a straight climb.  Watch the ball the next time you make a climbing left hand turn and it’ll make a believer out of you.

I find only a handful of pilots are this egregious.  Most pilots have rudder problems in turns and in turbulence.  We’ll tackle turns first.  As we all learned when we first started flying, due to adverse yaw, a pilot must add rudder in the turn’s direction.  Again, this isn’t usually where the problem shows up.  During the rollout is the problem area.

Let’s take a turn to the left.  The pilot rolls in, adding left rudder, arrives at his heading, then begins to roll out with the ailerons.  Left adverse yaw is now being experienced and right rudder is needed to smoothly transition back to level flight.  Need some visual assistance?  Watch the nose the next time you make a turn. If you are working the rudder properly, the nose will pivot on one point in the horizon.  If you aren’t using the rudder properly, the nose will draw a U shape on the horizon.  Try making some turns without rudder, see what it looks like, then use the rudder properly.  You’ll notice a big difference.

Finally, let’s talk turbulence.  As we all know, turbulence in the hot summer afternoon is quite pronounced. When the airplane experiences a bump, it usually doesn’t bounce straight up in the air.  There is usually some kind of rolling motion involved.  As the pilot corrects this rolling motion by moving the ailerons, adverse yaw is experienced (just like rolling into and out of a turn that we talked about above), so rudder is needed.  There isn’t a need to stomp on the rudder or you’ll cause the airplane to severely yaw in the other direction, but rudder pressure is needed.

Final approach is where this gets most pilots.  By controlling the nose and not allowing it to move around on final by using the rudder, this will make your approaches a little more stabilized leading to a more successful landing.

Feeling lost when it comes to the rudder?  Ask your instructor the next time you go fly to do some rudder exercises.  Most instructors don’t emphasize these basic stick and rudder skills which leaves pilots lacking as they move on in their aviation lives.  So make it a point to do some basic rudder work the next time you fly with your instructor.