Sunday, April 29, 2007

Cape Town Flying Club Enews 1 May

Website: http://www.capetownflyingclub.co.za
E-mail: info@capetownflyingclub.co.za
Tel: 021-934 0257
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From the CFI's desk
Courses
In Memory
Social
Aviator's Evening
Achievements
FAWC Night Circuits
Aircraft Accidents and Incidents
General
- Instructor needed
- Wanted
- Aircraft Raffle
Out and About
Climbing
Humour
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Dates to diarise

Date Event/Course
8 May Radio Course
11 May Club social/braai
31 May Aviators Evening at FAYP
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From the CFI's desk --> J van Zyl

The good news is that CAA has withdrawn the implementation date of 1 May 2007 for the new PPL exams. We therefore still continue writing the exams at the club.
The CAA will let us know when the new date is.

As from 1 May 2007, however, we at the club are implementing the new red tag system, so if you go flying from 1 May be sure to comply with the red tag system.
Those of you that don't know how the system works please don't hesitate to ask me or any of the instructors. This system is a CAA requirement and once you start using the system you will fully understand its importance from a flight safety point of view.

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Courses

A Radio course is to commence on 8th May 2007 with Chantal van Steijn from ATC, but she can only take five students, so first come first served.

We will how ever accommodate students should there be a large demand, by hosting a radio course ourselves close to that time frame.

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In Memory

Last year on the 25th of April, the newly formed Cape Town Flying Club had a tragic accident in ZS-FET that claimed the lives of our new CFI, Joaquim "Rod" Rodriguers, an instructor, Rossouw van der Watt and a student, Mohamed Abadallah.

You and your families are constantly in our thoughts.

High Flight

Oh, I have slipped the surely bonds of Earth
And danced the skies on laughter-silvered wings;
Sunward I've climbed, and joined the tumbling mirth
Of sunsplit clouds- and done a hundred things
You have not dreamed of- wheeled and soared and swung
High in the sunlit silence; hov'ring there,
I've chased the shouting wind along, and flung
My eager craft through footless halls of air.
Up, up the long, delirious, burning blue
I've topped the wind-swept heights with easy grace
Where never lark, or even eagle flew-
And, while with silent lifting mind I've trod
The high untrespassed sanctity of space,
put out my hand and touched the face of God.

John Gillespie Magee, Jr. RAF, KIA, 1940

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Club social 11 May

The Flying Club will be having a braai and general "get together" on the 11 May. Feel free to bring your family or friends.

Join others at the club and talk shop and see all the new faces. The bar will obviously be open, and the fires will be roaring.

See you all there!

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Aviator's Evening at FAYP 31 May --> C Teale

The Air Force Base Ysterplaat Aviators Night that will be held at theOfficer's Mess on 31 May from 18h00.

Guest speaker to be anounced.
Enq: Chris Teale: 021 508 6576
Office hours: Mon - Fri: 07h00 - 15h00.
Dress: Smart casual or flying kit.

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Achievements

Date-

Name Achievement CT/FK Aircraft Instructor Examiner
25/02/07 L. Perlman First Solo FK KFV H. Franz J v Zyl
27/03/07 J. Reder First Solo FK KKC F. Allie W. Watkins
06/03/07 J. Nicholson First Solo FK KFV J v Zyl -
08/03/07 J. Carlyle PPL - KFV E. Cornelisen J v Zyl
21/03/07 A. Bezzorini First Solo FK KFV M. Mann J v Zyl
01/04/07 D. Wilson First Solo FK KKU M. Mann P. Erasmus
01/04/07 D.G. Olckers First Solo FK KKC F. Allie W. Watkins
02/04/07 A. Russel Instructor GrII - TAE - D. Lempp
02/04/07 A. Vermaak Night Rating - KKU A. Russel B. Barnes. Watkins
08/04/07 W. Swanepoel PPL - KKU E. cornelisen B. Barnes
17/04/07 S. McKenzie PPL CT KKU J v Zyl P Wesselman
19/04/07 G. Pinnock CPL CT KSS P. Erasmus G. Smith
19/04/07 J. Seifert Instrument Rating CT TAE B. Barnes/P. Erasmus G. Smith
19/04/07 W. Fry Instrument Rating CT TAE B. Barnes G. Smith
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FAWC night Circuits --> G Pinnock

Unfortunatly, after all Linda Hodgkinson's planning, the weather Australiarized us (as in "shattered all our plans"). So for the umpteenth time, the circuits had to be cancelled at the last minute.

Not to be outdone, we managed to hold Peter Erasmus hostage and we flew our circuits at Cape Town. By the time that last plane had returned, Krassimere had the braai going and the food cooking.

So even though the venue was changed, a good evening involving flying was had (except by Linda's Weather Fairy, which was laughing too hard).

As an aside, Linda has apparantly offered her services as a rain maker to the UN. Hopefully the next event happens at our destination rather than the alternate! :)
Braai master Krassimere



















Some of the gang




















When SA used to play cricket




















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Incidents and Accidents 12 of 20: Fun with pictures --> Danny Buitendag

















The cockpit voice recorder may sound like this....:
10:56:11: Controller: "Gulfstream One, you're cleared to the Charlie Tango Foxtrot Charlie apron."
10:56:15: Pilot: "Cleared to apron, Gulfstream One."
10:57:05: Co-Pilot: "Waaa!!!"
10:57:09: (Sound of a loud crash can be heard)
10:57:19: Pilot: “Eish! What are we gonna tell the Chief?!”
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General

GrIII instructor needed

Full time grade 3 flying instructor required for flying club 1 hour’s drive from Cape Town.
Please send CV with contact details to henryv@intekom.co.za
Start date: immediate or ASAP
Pathfinder needed
Looking to by a 2nd hand pathfinder flight computer.
Contact Sean O'Connor: sean@flarepath.co.za

10th Anniversary Aircraft Raffle --> Dennis Jankelow & Associates/Reach for a Dream

Hi Everyone,

The raffle is going well, but remember guys we need to sell 10 000 tickets this year, I have a 3 page list of dreams that I need to fulfil, we have to sell all the tickets so we can help the kids at Reach for a Dream. Please help, if you have not already bought please do so and if you can please forward this email to as many friends and colleagues you can find.

FIRST PRIZE

Win all your toys at once............

A pristine 10/10 Mooney M20F valued at over R800 000
AND
A very fast, brand new Special Edition Ducati 1098
AND
A PPL or similar value conversion to type

9 OTHER PRIZES

9 PPL's

Cost of tickets is still R250.00 and this year being our 10th anniversary we will be selling 10 000 tickets so that we can raise a record amount of money for the children.

Please support us.

To enter:-
Either send us a return mail raffle@aircraftraffle.co.za with your telephone number and we will contact you.
or If your computer can receive attachments let me know and I will email you an entry form.
or Buy on line at www.aircraftraffle.co.za
or call the office on +27 (0)11 463 5550
Regards

Debra and all the Reach for a Dream Children

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Out and about

Club pub evenings

As you all know, the club bar is open on Friday nights. Last Friday an impromptu celebration party developed for some students. Some torture devices were also in attendance, and tradition demanded that the students get to know Mr. Bob!
Juanita Seifert passed her IF test the day before






















Gareth Pinnock got the Com the flight just before Juanita

















Jarrod Seymour-Hall passed all his Com ground subjects


















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Climbing --> Gary Wiblin

I am almost always amazed at the scant regard paid to the art of setting up and maintaining a climb by many flight instructors. Each and every time you take off in an aircraft you are going to be climbing to some or other altitude yet this seems to be one of the most misunderstood areas of the flying training syllabus. Remember, to climb an aircraft you cannot merely increase the angle of attack by simply raising the nose, thereby causing the aircraft to climb. Increasing the angle of attack will indeed initially cause the aircraft to gain altitude, but only temporarily as you will also be increasing the drag, thereby causing the indicated airspeed to reduce.

It is vital to bear in mind that when an aircraft is flying straight and level, lift equals weight and thrust equals drag. As the aircraft enters a climb, however, lift reduces and the thrust needs to be increased. That is not a grammatical error, as the angle of climb is increased, the lift produced by the wing does indeed decrease. If an aircraft were powerful enough to climb vertically, the wing would then be producing zero lift, ie. the aircraft would not even need wings. Think of a rocket blasting off its launch pad. It has no wings at all, just raw power coming out of its tail pipe. Therefore it can be seen that in straight and level flight, lift equals weight, while in a vertical climb, lift equals zero. It would now be thrust alone that equals weight plus drag. It is therefore obvious that as the angle of climb increases, lift decreases while thrust, and therefore power, increases.

Climbing complicates matters somewhat as the aircraft is flying at a relatively slow airspeed while at the same time developing full power. What this in effect means is that the engine, being air-cooled, may tend to over-heat if not treated with caution. Aircraft handbooks normally advise that a higher than usual indicated airspeed be used for prolonged climbs. The reasons for this are two-fold. The most obvious is that by flying at a higher indicated airspeed the engine will receive better air-cooling and of course, in order to increase the airspeed, you will have to lower the nose of the aircraft against the horizon thereby improving forward visibility, thereby negating the need to weave left and right in order to see straight ahead. In any case, while climbing at the recommended cruise-climb speed for your aircraft, slightly and imperceptibly lower the nose every minute or so in order to get an even better look straight ahead of the aircraft. The handbooks usually recommend that you weave the aircraft left and right in order to see straight ahead while climbing but practically this is not a great idea. Most first-time passengers in a light aircraft are more than a little distrustful and weaving about tends to upset them somewhat. Gently lowering the nose is far less perceptible and also does not look alarming to an air traffic controller who may question why your aircraft is following a drunkard's course.

Closely monitor the engine temperature and pressure gauges and if the engine temperature begins to rise more than is normal you may consider lowering the nose of the aircraft still further in order to supply yet more air-cooling to the engine. If you have been progressively leaning the mixture in the climb (allowed in some aircraft) you may also consider enrichening the mixture again. This also has the effect of helping to cool the engine due to the excess fuel being supplied to the cylinders.

If engine over-heating becomes excessive you may have to consider actually leveling off for a while, at least until the engine again cools to an acceptable level in order to once again commence the climb. If the aircraft that you are flying has cowl flaps, make absolutely sure that these are wide open, as climbing with the cowl flaps closed can lead to rapid and catastrophic over-heating.

Only once you have reached your required altitude and the engine temperature has stabilised can you close the cowl flaps, set the power, and lean the mixture for the cruise.

Never climb a piston-engined aircraft blindly. You will need to be constantly conducting a symphony of carefully orchestrated adjustments of power, mixture, cowl flaps, and indicated airspeed in order to keep the heart of your steed pumping reliably and continuously.

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Humour

Huh?? --> Kenny Cheung





























Thursday, April 05, 2007

Cape Town Flying Club News 5 April
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Courses
Night Circuits at FAWC
FARS breakfast
Aircraft Accidents and Incidents
General
- TAE leaving us
- Bar to be open
- Red Bull Air Race
Traps for unwary pilots: ground effect
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Dates to Diarise

10 April : Meteorology course

14 April: Night ciruits at FAWC

21 April: FARS breakfast

27-30 April: De Aar fly in

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Courses

10 April
Meteorology,lectured by Peter Erasmus

Call the club (021-934 0257) to book. Members are reminded that you can do the course as a "refresher" at half price.

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Night Circuits At FAWC 14 April --> Linda Hodgkinson

Things are on track for our planned flight to Nadini and then on to FAWC on 14 April. Many of the aircraft have already been booked but if you hurry you may be lucky enough to get one. If you have missed out, let Linda know if you would like to share a flight. If you were one of the lucky ones to get a plane and have a spare seat, also let Linda know and she will put you in contact with one another.
Details regarding the catering arrangements (the plan is for everyone to bring their own, but there will be economies of scale we can avail ourselves of, I’m sure) will be discussed closer to the time as will the time and place for the pilot briefing before departure.
For those who missed last week’s newsletter, here is the airfield info again:
Airfield info according to Airfields Directory:
FAWC: S33 40 E019 25.00
Runway: 15/33 1600m.
Remember to stay on the dam side of the airfield at all times, i.e. right hand circuit if 15 is in use – pilot briefing to take place before the event.
Fuel: to be confirmed closer to the time
Landing fees: waived (thanks Dick)
Nadini: S33 27 39.6 E019 51 30.0
Runway: 11/29 1600m gravel. Extra care should be taken with the a/c during run-up – also to be discussed at pilot briefing.
Fuel: no
Landing fees: none
You are also welcome to bring the family up by car and spend the day with us if you don’t want to fly.
SEE YOU THERE!

If you would like to stay in a guesthouse, and are worried about transport to and from FAWC, contact Linda.
Contact: Linda Hodgkinson

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Breakfast at FARS Saturday 21 April --> Robertson Flying Club

Robertson Flying Club is hosting their annual fly-in breakfast on the 21st of April from 9:00 to 11:00 at R50 per person.

Come and enjoy a morning (or day) in the valley of wine and roses. Bring a tent and sleep over in the clubhouse lawn. Hot shower and toilet facilities available at the clubhouse.

Airfield Info:

FARS: Licenced
Altitude: 640 feet
Runways: 10/28 1600m x 15m tar
Frequency: 124.8
Fuel: Avgas available

Contact: Alwyn 083 270 5888
Last year we had better weather than forecast. Phone if you are uncertain of local weather conditions

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Incidents and Accidents 11 of 20: Fun with pictures --> Danny Buitendag

The new circus trapeze act was a great hit

















( GP: The aircraft in the picture, a Cessna 150 registration N39AA, was landing behind a Beech D-18 when it encountered wake turbulence which caused the pilot to lose control. The pilot ended up flying 90 degrees to the 10 000' runway and into the power lines. The pilot was trapped in the aircraft for four (or three, depending on source, see reports below) hours before fire crews were able to get him down uninjured.

NTSB report: http://www.ntsb.gov/ntsb/brief2.asp?ev_id=20001211X09955&ntsbno=SEA98IA060&akey=1
From the Rescue Crew's perspective (with pics): http://www.ladder54.com/Photosplane.htm
)
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General

TAE

Due to circumstances beyond the club's control, TAE will no longer be available to the flying club from the 16th of April. All flying until then will continune to be dual only. All members who have booked after the 16th must please understand that the cancellation of flights is unavoidable. For those that want to fly 172's, the avgas JDN should be returning sometime.
Bar Open
The bar will be open on the weekends (including Friday night), and our DSTV is up and running, so pop in for a drink (after the flight) and watch our guys thrash the opposition in the cricket!
---
Red Bull Air Race --> Schalk Burger

The 2007 World series takes off in Abu Dahbi on the 5th and 6 of April. 14 Pilots in 12 international races, so expect some awesome viewing.

http://www.redbullairrace.com

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Traps for unwary pilots: ground effect --> G Pinnock

We've all used ground effect to help us with short field take offs, so how could this be called a trap for an unwary pilot? Well, like most good things, it can be abused, with disastrous results.

Ground effect may allow an overloaded plane to leave the runway while the aircraft desperately tries to get airborne, only to find itself sinking back to the ground with a nice smooth runway behind, and zero options ahead. Or picture the poor student who tries hard to make the plane land gracefully and finds that the plane floats down the runway when it was expected to land (which can often cause the hapless student to force the plane down... generally resulting in the plane doing a plausible imitation of a kangaroo).

The superpowers understood ground effect very well; in fact, they even created aircraft to operate only in ground effect. Even something with a brain as small as a bird utilises the "ground effect" to minimize effort (which is why birds often fly in a V-formation).

So why does flying close to the ground (or in formation) allow a plane to fly before it should? The brief answer is a reduction in drag. To understand why, we need to examine a few basic principles.

We all know there are pressure differentials around the wing (aerofoil) and that this creates the conditions neccessary for lift. We also know that lift produced by the aerofoil is perpendicular to the relative airflow. In normal flight (i.e. away from the ground), the high pressure air below the wings “curls” over the wingtip to the top of the wing and disrupts the low pressure, causing drag and forming wingtip vortices. (As an aside, many aircraft, such as the 747-400, have winglets fitted to hinder the “curling” of the air).










Additional drag is the created when the vortices influence the airflow around the wing, creating a slight upwash in front of the wing, and a downwash behind the wing.











This downwash and upwash alters the relative airflow, which then inclines the lift vector back slightly. This vector can then be broken into a vertical component (lift) and a horizontal component (drag). An increase in angle of attack leads to greater pressure differentials over the wing, leading to stronger vortices, which leads to more drag, which is why induced drag decreases with speed (the angle of attack is reduced to maintain level flight at higher speeds).













Which all brings us back to the ground. Close to the ground, the creation of vortices is greatly reduced which leads to a decrease in induced drag. (I say close to the ground, because we don't generally fly like birds in formation).












The decrease in the downwash and drag are two things that should be understood by the pilot. Elevators can be affected by the downwash of the wing (except obviously in the Tomahawk), which is why the elevator can lose effectiveness while in ground effect. Pilots who haul their aircraft off the ground and stagger into the air may suddenly find the elevator increase in effectiveness once out of ground effect, which would immediately put the aircraft into an extreme nose-up attitude, with the resultant danger of a stall. (As an aside, the elevator effectiveness while in ground effect plays a huge role in determining the CG fore and aft limits.)

So how do we make use of this phenomenon to our advantage?

If you are doing a short field take off, remember to accelerate to a safe climbing speed, which will allow the aeroplane to fly once you lose the helping hand offered by ground effect. If you don't, bear in mind that the sudden increase in drag can cause your power required to exceed the power available, which leaves only one option - going down. This is something to remember especially when flying KSS or PMY - prematurely retracting the gear and trying to climb out of ground effect can dent both your pride and the aircraft.

On landing, be careful of any excess speed. When an instructor wants 70 kts, they mean 70 kts for a very good reason. The sudden decrease in drag means that any excess speed can cause the aeroplane to float happily down the runway for a long time. A quick calculation reveals that at 70 kts, every second in the air uses (read ‘wastes’) 35m of runway. Obviously this increases as the speed increases (80 kts = 40m/s), which can eat up your short landing field very quickly. Besides the float, a pilot may be tempted to plant the aeroplane down, with the resulting aforementioned kangaroo imitations (and possible damage to the aircraft).

Ground effect can lend a helping hand if you are expecting it. Just use it wisely.
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