Crescent-shaped wing
http://www.aiaa.org/content.cfm?pageid=406&gTable=mtgpaper&gID=65912
Misc tech paper etc. link collection
I hope you like it. It is not sorted in any sense, but it contains lots of interesting links. A friend of mine has been sending these to me a quite long time and I thought that I could share the collection with you.
http://gforge.katix.org/gf/project/twinzygger/wiki/?pagename=MiscTechPapers
Question time #50 with 2nd clue added.
Passenger numbers continue to decline
In April 2009, Jat transported 77.273 passengers. This means, compared to last April, passenger numbers have declined by 18%. In April 2009 the CLF stood at 57% which is a decrease from 59% in April 2008.Compared to last year the only sector seeing an increase in passenger numbers is charter services. There were a total of 15 more charter flights in April 2009 compared to the same month last year. Charter flights have increased by 10% this year while passengers on charter flights have also increased by 12%.
By the end of April 2008 a total of 15.000 passengers travelled with Jat to Montenegro while this year the number is 5.646. On Euro-Mediterranean services Jat carried a total of 67.323 until April 2009, compared to 74.894 passengers last year. Passengers travelling on Jat’s charter flights increased from 3.833 to 4.305 this year. Nevertheless, April is so far the best performing month for Jat so far this year. The low passenger figures are a result of the global financial crisis. The airline will publish its May results in a few weeks. Last year Jat recorded its best May passenger figures since 1991, which will be tough to beat this year.
Question time # 47 Resolution
Rotorway Executive ZK-HUN
Bruce imported it into NZ and set up at number 5 hangar at Wigram and registered it as ZK-HUR on 20-03-2007. Alas it proved not to be quiet what Bruce had purchased.
A new mainframe was purchased but damaged in transit. This was repaired. Then a new tail boon and tail rotor was obtained. The engine is an in house Rotorway 152 of 140hp. This drives onto a quad V drive belt. With the closure of Wigram this project has moved to Rangiora, creating more delay, but it is progressing slowly.
Seldom seen visitors from out west.
Croatia Airlines plans Iran service
Meanwhile, Croatia Airlines will be wet leasing a single Bombardier CRJ200 from Adria Airways. The aircraft, registered S5-AAG, is in the Star Alliance livery. It will be used mainly on services from Zagreb to Munich, Zadar and Pula until the arrival of Croatia Airlines’ new Dash Q400 in July.
Montenegro Airlines changes aircraft order
In the meantime the debate of who should take over the Montenegrin carrier is intensifying. El-Al Israel which has so far shown great interest in the airline is sending a delegation to Podgorica, for a second time in two months. The management of Montenegro Airlines will meet with the El-Al delegation next week. Yesterday, a Greek business delegation held talks with the Montenegrin Government. The delegation which included the Restis Group, Greece's fifth-largest shipping company, showed interest in Montenegro Airlines. The Restis Group would like Montenegro Airlines to begin scheduled 3 weekly services from Podgorica to Tel Aviv via Rhodes and Athens. The 3 weekly service would, according to the Restis Group, be increased during the summer period. Yesterday, Sun d’Or International Airlines, an El-Al subsidiary began services from Tel Aviv to Tivat.
Breaking the cabin fever at Rangiora today.
ZK-VAL |
Coyote 11 ZK-DYM |
Vans RV-4 ZK-SIM |
ZK-AXC |
ZK-EDG |
Heli CD Contractors Hughes 369E ZK-HCD |
P2002 Siera RG ZK-SRG |
Star Alliance dumps Adria and Croatia
Star formally invited Greek carrier Aegean to join the alliance as a full member today. The airline is expected to finally join the largest alliance in mid 2010. Aegean will bring nine new destinations to the alliance network plus a sizeable domestic network that Star Alliance so far has not had access to. Its principle competitor, Olympic, is not yet aligned with any of the other groups. Star officials point out that Lufthansa's proposal to add Aegean was quickly adopted. Turkish Airlines, geographically the nearest member, did not object to the plans either. Lufthansa was the sponsor of both Adria’s and Croatia Airlines’ membership in Star.
The airlines expected to join the alliance this year are Brussels Airlines, Continental Airlines and TAM Airlines. Next year, besides Aegean, Air India will also join the alliance. Adria Airways and Croatia Airlines become regional Star Alliance members in 2004. Their fate in the alliance will officially be announced next month.
ZK-REX moving aside for another ZK-REX.
The second edition became ZK-MIS and was registered by Rex on 19-10-2007 before being relisted to The COD Impact Trust on 09-01-2008.
Rex now has a third such aircraft almost ready to roll out. My guess being that this will become ZK-REX5 in the very near future.
[As a matter of interest: If a registration has been issued several times, I add a number to indicate which allocation we are discussing. In the case above we are talking about ZK-REX issues number 4 and maybe 5].
To help complete the picture:-
ZK-REX1 was a Cessna 310B [c/n 310B-35654] from 1958 until 1959.
ZK-REX2 was a Embraer 110P2 Bandeirante [c/n 110-184] between 1989 and 1996.
ZK-REX3 was a Embraer 110P1 Bandeirante [c/n 110407] between 1996 and 1999.
ZK-REX4 was Vans RV7A [c/n 71200] as above.
ZK-AEJ
The Racing has gone out of Rugby, Racing & Beer.
All Blacks at Ardmore
More cancellations.
Sadly it crashed into Lake Wanaka during a ferry flight on 01-11-2008 with the loss of the pilot.
Austrian takes over MAT service
Operating under the Austrian Arrows brand, the new 72 seat Bombardier services will be operational from June 2 this year. Macedonian Airlines (MAT) has run out of aircraft in the past three weeks following the misunderstandings between the carrier and the Civil Aviation Agency, which were triggered by the overhaul of MAT's sole aircraft, the Boeing B737-500.
From June 1, 2009, Adria Airways will have the greatest share of services from Skopje. It will have a share of 19.7% of all flights, Jat Airways will enjoy a share of 16.9%, Malev Hungarian Airlines and Austrian Airlines both with 15.4% of all flights from Skopje, Croatia Airlines with 11.2%, CSA Czech Airlines with 8.4%, Turkish Airlines with 7%, B&H Airlines with 4.2% and Bulgaria Air with 1.4%.
Tailed blended wing body with laminar flow body and Goldschmied suction and pressure thrust
- A body that comprises of a laminar body and wing blended together
- There is a V-tail in a blended boom
- Rear of the center section has suction slot on top side
- The boom contains a electric fan that is used for suction and additional thrust
- There are two turbocharged Rotax 912UL engines in the wings which are hidden in blended pods that continue the airfoil shape of the wing without interruption
- Both engines turn additional turbochargers which drive generators which generate electricity for the rear fan of the aircraft
Items that need to be studied:
- does pressure thrust work with this kind of shape, or does it require axisymmetric body?
- compare the drag of minimum axisymmetric body with non-blended wings to a blended wing body which has larger cross sectional area, but potentially lower wetted area.
- wing incidence relative to the center section - center section has a lower aspect ratio than the wings and what it requires to achieve optimal lift distribution in this combined case
- the achievable gain from the lack of interference drag or very small interference drag
- optimal wing loading for a combined blended wing body compared to a pod+boom+wings solution
- shark fin shape on the outer wing sections, the gain and the issues
Jat to disappear
Vlaisavljević said that the new visual identity will cost the airline approximately 250.000 Euros but that the process, which has been delayed many times, must be complete when new aircraft start arriving. Jat’s current look, known as the “the flying dots”, was applied in 2003 when the airline changed its name from JAT Yugoslav Airlines to Jat Airways, after Yugoslavia ceased to exist. On Friday, Jat will name a 3 member team which will be involved in the negotiation for the purchase of new aircraft. This team will travel to the Paris Air Show which will be held from June 15 to 21 where an agreement should be made for the purchase of 3 new ATR72-500s, to replace the current ATR 200 series, in the airline’s fleet.
Jat’s current CEO, Saša Vlaisavljević will leave his position on June 1. Will his idea of a new look be carried out by the next Jat administration remains to be seen. Vlasavljević also made a promise for a new look in 2006 although plans were put on hold. This is why this news must be taken with caution. If the plan goes ahead, the name “Jat” will disappear from the skies for the first time since 1947.
Tiger Moth ZK-BAR finally cancelled.
Registered in NZ on 04-11-2004 to John Copland using the c/n of 1123. This apparently is not its true c/n but probably a corruption of 445/T.123 which was applied to A17-401 which is thought to be the original identity of this aircraft when it was constructed for the Royal Australian Air Force. Its history is a bit obscure but VH-AKF is linked to this airframe from March 1947 until a crash at Sale, Victoria on 06-01-1950. Then from 08-10-1958 VH-AHB appeared, built from many parts including VH-AKF. VH-AHB crashed at Kerang in Victoria on 10-10-1964 and seems to have disappeared for forty years to pop up as ZK-BAR.
Sadly it crashed and was burnt out not long after take off from Ashburton on 02-12-2006 claiming the life of its owner and his passenger.
Cancellation effective from 16-04-2009.
Mixed results
Airports continuing to report negative trends are Split, Dubrovnik, Pula and Osijek. The worst affected this April, due to its low volume of passengers, was Osijek. The airport saw only 137 passengers compared to 887 last year, a decrease of 85%. Also performing badly was Pula whose passenger numbers decreased by 51% to 9.381. Dubrovnik saw a decrease of 7% with a total of 68.907 passengers this April. Split performed the best out of the worst with a decrease of only 1%. It had 54.878 passengers this April compared to 55.440 during the same month last year.
The number of passengers transiting through Croatian airports were recorded in Zagreb, Split, Dubrovnik, Pula, Zadar and Rijeka. Zagreb saw the largest decrease of transiting passengers in April with figures falling by 53% compared to last year, meaning more people are choosing not to travel on from Zagreb. In contrast Dubrovnik, Pula and Rijeka saw an improvement with more transiting passengers.
The results, like all during this year, have been largely affected by the global financial crisis.
Beginner RC Helicopter Training
You need to do your flight checks before getting into the business:
- Check all mechanics of you rc helicopter are in working condition. Moving parts are smooth but not loose.
- Training gear is one important thing during this training session, make sure it is properly secure on the skids.
- Range check is to be done and see if all the transmitter switches are on the correct positions.
- Calm or no wind is a requirement; gusting wind is a big NO.
- Choose an open area preferably a ground with no obstructions preferably no people. Being on a field with soft grass is a very good support for sense of safety for your RC helicopter.
Since we have done the skidding on the ground and for that we needed a hard surface. From now on your heli will remain in the air while practicing the coming lessons, you require a little soft and grassy surface to protect your rc heli from a sudden land or if it drops because of engine failure. The training gear on the skids also protects a lot in incidents like these and even if you are doing a very good hovering, training gears help in tipping over in case of emergency landings. Training gear also helps as a visual aid which helps in seeing rolling and pitching better than you can detect from rc heli body movements. But it need emphasis that you keep your focus on the nose section of the rc helicopter, the suggested bright color of the training gear tips will be totally noticeable in the background of it.
You will require a reference point to reach to if there is none; bring something to make a reference for your flight.
Put the helicopter into the wind and stand 8- 10 feet at the rear side of the rc heli. Start your helicopter and start hovering above the ground slowly. Do the cyclic controls by practicing day one maneuvers of left right, backward forward, up down, and diagonal crosses. This will be a warm up for the figure of 8 maneuvers today.
RC Helicopter Training:
It’s a thrill to feel your rc helicopter flying. Now for making a figure 8, see the illustration above, it is as simple as it looks in the picture above. If I were to put the sequence into words; put the rc heli into the wind direction on the reference point. Start hovering 3-4 feet above the reference point and slowly start moving at the forward right or starboard bow diagonal. When it has covered 8 feet of distance from the reference, make it move onto the starboard (right) only. 8 feet more and move your rc heli starboard aft or backwards left, 8 more feet and move it only aft or backwards for 8 more feet. Now move it port aft or backwards left diagonal for 8 feet, then port or left, then port bow or forward left diagonal, forward and then land back onto the reference point. This may seem a little complicated but keeping the figure above in front it will be easy to understand that I am only talking about completing a circle on right hand side of your reference point. The circle flying will be more like an octagon due to edges on the turns but will become a circle as you gain more control on the maneuvers of your rc helicopter with practice. You can well imagine a circle of around 16 feet in diameter completed fly by your rc heli mark it if you want and go for the circle on the left or port side of the reference point. Take your time in completing one circle and then land to fly another. You will practice more and more and will start making perfect circles. Make smaller and larger circles than the one we have discussed by changing the distance. As you get comfortable in completing one circle, don’t land; keep flying for the complete figure of eight.
You need to be in complete control of the rc helicopter all the time. Gaining control over commands is the main aim of this lesson. You need to stay in control and increase your flying time. Although in this lesson we kept the rc helicopter in the direction of wind but still you have seen your heli to come near you and move away, this feel will give you an orientation of your rc heli and prepare you to fly the rc helicopter nose pointing into the direction of the flight instead of wind. This lesson of beginner RC helicopter training in which we did a figure of eight rc helicopter flying is very important to give you a confidence of moving onto the next step of better flying.
Happy flying!
Tonja
New flights from Banja Luka
During 2008 a total of 12.000 passengers passed through the airport’s doors, while this year the number is expected to be significantly increased. The airport’s management believes that passenger figures would be even higher if the rigorous visa regime currently in place would be lifted. Citizens of Bosnia and Herzegovina must have visas to travel to any country within the European Union and they are often difficult to get.
Currently, the cost of tickets from Banja Luka to Belgrade one way amount to 148 Convertible Bosnian Marks (75 Euros) while a return ticket costs 273 Convertible Bosnian Marks (139 Euros). A one way ticket on flights to Zurich cost approximately 178 Euros, although there are 10 different pricing options, all of which depend on the amount passengers stay in either Zurich or Banja Luka, depending on which city they travelled to. Plans for the launch of the low cost Sky Srpska, which was to have its hub in Banja Luka, have been delayed until further notice.
Question time # 47
Question time # 49 Resolved
Jetconnect goes Australian
Caught up with the latest Jetconnect 737-476 ZK-JTS at Auckland International today.
One point of interest is that this aircraft also carries the "Spirit of Australia" tagline, which has been carried by the VH-registered Qantas aircraft but has been absent from the local variety until now.
Then out came ZK-JTP, which has also been painted with this tagline. ZK-JTP did not carry this logo in earlier days, so perhaps the fleet is being prepared for a return to the Australian register.
ZK-JTP now:
and in earlier days (27Jan2007)
Adria reports losses
Tufek explains that the economic crisis had hit the majority of European flag carriers, who are fighting it with price dumping. He added that people are economising and this also shows in the number of travels. Recently Adria Airways launched its new flights from Ljubljana to Madrid. According to Tufek, the new route between Ljubljana and Madrid is expected to carry about 5.000 passengers annually. In 2006, Adria Airways opened the Ljubljana to Barcelona service, which has been operating with two flights per week since this April. With the new route, the company wants to attract both business passengers and tourists. Madrid, which lies in the middle of Spain, is a good springboard for visiting other parts of the country, he added. Flights to Madrid operate twice per week using the CRJ900. Ticket prices start at 185 Euros.
New aircraft arriving tomorrow
Meanwhile, the airline has received some more good news. It will become a member of the Association of European Airlines (AEA) in October at a ceremony in Dubrovnik. The AEA is an alliance of 36 of Europe’s largest airlines. Among its members are TAP Air Portugal, British Airways, Air France, KLM, LOT, Tarom, Malev, Turkish Airlines, Iberia, Alitalia, SAS and many others. From the EX-YU region Croatia Airlines, Jat Airways and Adria Airways are all members. Currently, Ivan Mišetić, Croatia Airlines CEO is the president of the association. The membership will allow Montenegro Airlines to be more involved in the process of aviation regulation which is set by the European Union in Brussels.