Descending
with a plan by Rusty Sachs
Many pilots struggle with
planning their descents from cruising altitude and arrivals after a
cross-country flight. It doesn’t need to be a struggle. A little
planning—and some basic math—can help.
When approaching your destination on a VFR cross-country flight,
plan your descent to arrive at pattern altitude 3 to 5 miles from
the field. This gives you ample time to locate the airport visually,
scan for other traffic in the pattern right at the horizon, where
it’s easiest to see, and plan your arrival.
Begin your descent with the knowledge that you need 4 miles for each
thousand feet you have to lose with a groundspeed of 120 knots and a
500-foot-per-minute descent rate. If you’re flying at 8,500 feet,
and the field elevation is 1,500, you have to lose 6,000 feet to get
to pattern altitude. Six (thousand) times 4 miles equals 24 miles,
so begin your VFR descent 27 miles from the field to arrive at
pattern altitude when you’re 3 miles out.
To determine the proper rate of descent to remain on a 3-degree
glideslope, multiply your groundspeed in knots by five; this will
give you the proper descent rate in feet per minute. If you fly the
glideslope at 90 knots, the correct descent rate will be 450 feet
per minute.
A few moments spent planning your descent while still at cruising
altitude will pay major dividends for you and your passengers’
smooth, no-fuss arrivals at your destination. And the math necessary
to make it happen shouldn’t require much thought.
Rusty Sachs is a Master Instructor and the director of the National
Association of Flight Instructors.
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Bring a simple survivor kit cross-country
By Rusty Sachs
Carry a simple survival kit on every cross-country flight; better to have it and not need it than the other way around! A kit is easy to assemble, and you probably have most of the components readily available.
The first element is the container. Make it brightly colored, so you can find it in dim or smoky conditions, and easy to grab. Then place it within reach of the pilot. Many folks use a small backpack with several straps and handles.
Next, decide what to carry. Bear in mind the Rule of Threes: A human being can survive 3 weeks without food and 3 days without water, but only 3 hours without protection from hostile weather. So concentrate on what will be most important in the area you’ll be flying—sun protection in the desert, heat conservation in the snow. A few quarts of water can be crucial, as can a first aid packet.
A handheld radio or cell phone goes a long way toward getting help for you.
Your survival kit should be a dynamic tool, changing with the seasons and varying in its composition from trip to trip.
Rusty Sachs is a Master Instructor and the director of the National Association of Flight Instructors.
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Classic rules every
pilot should know By Tom Gilmore, MCFI
Experienced pilots have often worked out simple solutions to many of
the vexing questions that arise every day in the cockpit. Here’s a
quick collection, guaranteed to save some time and frustration.
- 1. Begin an IFR trip by pulling
out approach charts for only the airports needed. You can run
copies of the approach charts if they are book bound and even
enlarge them on a copy machine. Place the departure airport on top
with the airport diagram first. Next in the stack, place the
expected approach of the destination airport. If an alternate is
required, put those in the stack next with the expected approach
that would be first in order.
- Always carry a pad of sticky notes
in your shirt pocket with an extra pen. These can be used to copy
your clearance, and then stick the results to the side window. You
can also use them for copying information from ATIS (automatic
terminal information service), for recording an abbreviated
weather briefing, and to cover up inoperable instruments, if
needed. They are a must for my flight bag and shirt pocket.
- Pull out only the en route chart
you need with the route of flight highlighted—use the new
highlighter ink that can be erased. Fold the chart to the
appropriate panel for the flight and keep upcoming charts in order
and folded for the route.
- Dedicate your number one navcom
for en route ATC use. Use your number two for ATIS, ground, and
tower.
- Place a stiff piece of cardboard
(a cereal box will do) the size of an approach chart under the
active chart on the yoke clip to keep it from flopping down on the
bottom.
- Highlight the five most important
items on the approach charts: minimum en route altitude or density
altitude; time to missed approach; final approach course; initial
approach fix; and missed approach procedure.
- Have all the required frequencies
loaded in the navcoms at least 8-10 miles out.
- Use a tri-fold kneeboard to keep
all charts and flight documents needed for the trip. Put items of
use on the center under the kneeboard clip. Next, place all charts
for approach and en route in the right-hand section. Then place
all items used and not further needed in the left pocket. After
the trip, you can store these. The flow of this procedure is from
right to left and makes sense as you progress on your trip.
- Use a handheld radio to get ATIS
information and ask if your clearance is ready before start-up.
This saves time, fuel, and frustration.
Tom Gilmore owns and operates
Gilmore Aviation in Stuart, Florida. He is a Master Instructor and
has been a NAFI member since 1981.
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Tip from Bob Jex, MCFI
- When totaling up your logbook,
write the totals in pencil. This is perfectly legal and permits
easy correction of errors that inevitably surface later in a
pilot’s career.
- When using a GPS for an IFR
flight, run an RAIM prediction before leaving the chocks to see if
there will be enough satellites overhead your destination when you
arrive.
- Learn to use aerodynamic braking
for most landings: NASA uses this technique for the shuttle; the
physics are the same for the more “mortal” pilots among us!
Bob Jex is a Master Instructor working at PanAm Academy in Vero
Beach, Florida. He belongs to NAFI and EAA, a member since 1996.
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Tip from AVWeb
Want to feel special inside controlled airspace? Request a Special
VFR clearance. While your VFR buddies scratch their headsets, you'll
scud-run with FAA approval.
Let's review the SVFR rules to see how special you really are.
Go to
Quiz #84 -- Special VFR
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Tip from EAA Sport Aviation
/ March 2005
Rule of thumb for take offs: You should
have 80 percent of your flying speed when you've reached the
midpoint of the runway. If you haven't reached that magic number,
it's time to pull back the throttle and put on the binders.
When it comes to landing, remember the old one-third rule:
Always touch down in the first third of the runway. If that isn't
happening, it's probably time to go around and try it again. |
Tips for Avoiding Spatial
Disorientation / Flight Safety Foundation, Vol. 39, No.1, Jan./Feb.
1992
1 - Seek training in the use of instrument references,
including cross-checking skills, and practice them regularly.
2 - Avoid any unnecessary flight maneuvers or quick head movements
that can induce sensory illusions.
3 - Avoid mixing visual flight and instrument flight when possible.
Transition from visual to instrument flight in anticipation of
entering marginal or instrument conditions.
4 - Acquire some level of dark adaptation before departing on a
night flight.
5 - Avoid fatigue, sleep deprivation, tobacco, hypoglycemia, and
alcohol consumption 12 to 24 hours prior to flight, and avoid more
than three alcoholic beverages per week on average.
6 - Avoid excessive caffeine consumption, self-medication, or other
self-imposed stresses that can aggravate various sensory illusions.
7 - Avoid flying when suffering from acute medical problems
affecting the sensory systems, such as a cold or congestion.
8 - Remember that susceptibility to spatial disorientation increases
after several weeks of no flying, and, also remember, that training
and experience do not make you immune to the effects of spatial
disorientation. It can happen to anyone. |
Mike Rudd's Keep Fit Checklist
This is a checklist that was handed out at one of the Microlight
Aviation Club meetings, in Popham, England. In this area, Mike Rudd
is fairly world famous for his microlighting abilities, having
designed various modifications, and built his own microlights and
even designed and built microlight trailers! This is just a
checklist of the sort of stuff you can check every time you fly,
that will help keep your aircraft in tip-top condition. This was
originally written for the Thruster microlight, but I've tried to
adapt it to apply to more or less any type, so if something doesn't
make sense, don't worry. These checks were supposed to be as
well as the checks in your owner's manual.
Your Mileage May Vary
Engine and Prop
- Check that prop bolts are torqued per the
manual, and that lock nuts are retightened.
- Check the gearbox oil level (and condition).
- Check the gearbox oil casing - the nuts
should be tight, and there should be no oil on the casing.
- Check the spark plugs are clean, the gaps are
set, the plugs should be tight and the caps pushed fully home...
tip here: see if it's possible to get a bungy cord to hold the
plug caps down tight, as they have been known to vibrate loose -
on the 503 you can drill small holes in the airscoop that bolts
on over the finning.
- Carbs should be upright, check the mounting
rubbers are undamaged, and are clamping the collars tight.
Throttle cables should be unkinked and set level.
- Fuel pipes should be secure, with no nicks or
chafes.
- Exhaust and crank case bolts should be tight,
and there should be no leaks.
- The engine mounting bolts and mounts should
be secure and tight.
- The silencer (muffler) mounts should be
whole, and the mounting nuts tight.
- Check that the cylinder head nuts/bolts are
tight, and the cowl bolts are secure.
- The ignition coils and other wiring should be
secure and free from damage.
- The fuel pump mounting and casing screws
should be tight, and there should be no fuel leaks.
- Check the engine mount frame (usually steel
tube) for missing paint, rust and cracks, especially near weld
joints.
Airframe
- Using the correct spanners (not an
adjustable!) check the tightness of all bolted joints between
the tubes that form the airframe structure. All should be easily
accessible, except within the wing frame, which should be
stripped every now and then to be checked.
- Pay special attention to the spring to axle
beam bolts and any "A" frame junctions, but do not tighten so
much as to crush tubes.
- Check the mountings for the fuel tank, and
that the tap moves easily.
- Tube ends should be checked (small animals
like to nest in there!) and rivets in the main spar should be
checked to make sure they're tight.
- Seat rails should be tight, and all the bolts
secure.
- Control cables should be checked and
cleaned... cables have a tendency to pick up grit which then
acts as an abrasive. Check the crimps on cables... these are
prone to suffering unseen corrosion, so look for "salting" or,
in serious cases, looses strands. Check that the pulleys are
turning properly, and aren't damaged.
- Check the stick and pedals, for free
movement, and the mountings to make sure that they're tight.
- Check throughout the airframe for rust on
bolts, rivets and screws.
- Check that all plug-ends are in tight.
- Check the wheel nuts, both the spindle and
the nuts to hold the wheel together. These are often found to be
very slack.
- Check all moving parts. Also look for any
flexing of the welds in tubes where applicable.
- Check all wing (and tail) surfaces, the
integrity of internal frames, hinges and safety clips.
- Check the nose or tail wheel... the castor
bolt should be only just loose enough to allow turning. The
spring fixings have also been found to be loose.
- Check the rudder mounting bolts.
- Whilst checking the moving parts,
lubricate where necessary.
Coverings / Skins
- Any damage to the skins should be properly
repaired, surfaces should be tight and any misshapen battens
removed and re-profiled... tip here: retighten the skins with
some (or all) of the battens removed.
- Certain skin materials, notably Dacron,
degrade in UV light, causing weakness. To form ajudgement on the
serviceability of the skin covering material, call in expert
help... if you can poke a finger through it - get it recovered.
- Algae / green microbes like to colonise on
the wing skin... they rot the material, so strip it off
occasionally and wash in a mild, soapy solution.
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A True Rule of Thumb
What good is a rule of thumb if you can’t really use your thumb? Well,
believe it or not, your stubby finger is good for something other than
hitchhiking. For the average individual, the length between the tip of
one’s thumb to its midpoint (the knuckle where it bends) equates to about
10 nm on a sectional chart. This can be helpful when eyeballing distances,
such as for a quick deviation, although it’s not recommended to use this
method to measure an entire route or to stay clear of unfriendly airspace.
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Attaching Lexan® and Plexiglas®
Nils Eyton, Chapter 222, Sweden
Originally published May 1997
www.eaa1000.av.org
At the 21 January meeting, Russ said that Lexan®
or Plexiglas® easily breaks when screws work on it when fitting it.
Not so if you use good fitting procedure: Countersink the hole, use
a Tinnerman washer, and a larger hole than the screw. It is often
easier to countersink first, then drill the center hole. The screw
never works directly on the glass. (Be sure to also avoid
scratches at all costs--scratches create stress concentrations that
lead to cracks.)
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