How is the ATR 42/72 empennage considered? Is it a T-Tail or a cruciform tail? From the image the elevators are placed quite high on the tail that they can be considered as a T-Tail but is it so?
Looking at the tail of a 727 the elevators are placed at the top of the tail but just leaving the space for the mechanism to move them, whereas on the ATR they are placed in a slightly lower position.
Are there any technical specifications and measurements that clearly define the difference between the two mentioned configurations?
I understand that cruciform means "similar to a cross" but it would be interesting to know, as previously mentioned, if there are specifics about this definition making it clear for everyone from a technical point of view. (briefly, when does a T-Tail become cruciform?)
As far as technical specifications are concerned, some explanation is:
Excerpt from Wikipedia (formatting is mine):
DESIGN: The horizontal stabilizer is mounted on top of the fin, creating a "T" shape when viewed from the front.
- T-tails keep the stabilizers out of the engine wake, and give better pitch control.
- T-tails have a good glide ratio, and are more efficient on low speed aircraft.
- However, T-tails are more likely to enter a deep stall, and are more difficult to recover from a spin.
T-tails must be stronger, and therefore heavier than conventional tails. T-tails also have a larger radar cross section.
DESIGN: The horizontal stabilizers are placed midway up the vertical stabilizer, giving the appearance of a cross when viewed from the front.
PURPOSE: Cruciform tails are often used to keep the horizontal stabilizers out of the engine wake, while avoiding many of the disadvantages of a T-tail.
In reference to your comparison between ATR 42/72 with Boeing 727, if we take out the difference in tail heights (ATR 42: 24' 11"; ATR 72: 25' 1"; B727: 34' 0"), the position of horizontal stabilizer on vertical stabilizer is almost the same on these three airplanes. So they all match closely to a T-Tail configuration rather than a cruciform.
. Are there any technical specifications and measurements that clearly define the difference between the two mentioned configurations? I understand that cruciform means "similar to a cross" but it would be interesting to know, as previously mentioned, if there are specifics about this definition making it clear for everyone from a technical point of view. (briefly, when does a T-Tail become...How is the ATR 42/72 empennage considered? Is it a T-Tail or a cruciform tail? From the image the elevators are placed quite high on the tail that they can be considered as a T-Tail but is it so
The MD-900 is a helicopter which seems to be quite popular with law enforcement agencies. As you can see, instead of an anti-torque tail rotor, a fan exhaust is directed out slots in the tail boom. I was wondering if this works in regards to auto rotation, should the aircraft lose its engines.
of occurrence is approximately: 3/16/2014 6:09pm CST I have also verified FlightAware is ALSO showing the same weird glitch. See below "yellow" highlighted airplane: Same A/C from FlightRadar24...I was looking through my virtual radar logs one of the days and found this "glitchy" ADS-B behavior. I am almost 100% sure that this is not due to my antenna or setup since two independent different radars confirmed this weird behavior from FlightRadar24. Also A/C before and after this one did not exhibit this behavior. Does anybody have any thoughts as to what may be happening??? Why
I took a couple of pictures of various aircraft and I would like to know which aircraft I photographed. I have no idea, expect that all of them took off from ZRH and should be commercial airliners:
In Did this aircraft illegally exceed 250kts below 10,000ft? it was mentioned that unlike here in the US, EASA does not have a 250 kt. speed limit below 10,000 ft. So does this mean that are we allowed to go as fast as we want? Mach 8? ;-) What is the maximum indicated airspeed specified by EASA when operating in the European Union?
Let's say that we're directly west of CATLI and have been cleared direct CATLI for the RNAV approach. We load the approach into the GNS430 and proceed direct the fix. After crossing CATLI outbound for the hold-in-lieu-of-procedure-turn, we realize that we want to stay in the hold for a few more turns. How do I tell the 430 that I don't want it to sequence to ZAMGI upon arrival at CATLI?
During WWII, a number of German companies received financial backing and slave labourers from the government at the time. Companies such as Hugo Boss, Volkswagen and Lufthansa. A thread on Airliners.net from 1999 mentions a documentary showing Lufthansa planes flying with the Swastika on their tail. I found this image online: What is the story behind Lufthansa's involvement with the National Socialist Party? Did they indeed receive large monetary backing from the then-government?
Are there any good resources that teach you how to identify jetliners from the ground? I'd love to see some great comparative photos of their silhouettes. Books or websites are both ok. For example, here's a plane that was flying over yesterday en-route to KSFO. I'm guessing it's a 747 or A380, but I can't easily guess from this angle.
There are two main types of supplementary oxygen devices in light aircraft: Cannula: Oxygen mask: What are the major differences between these two devices? Is one more suitable for specific si...
On SIGWX charts, it shows pairs of symbols with, say, */** or **/**. I know what the symbols mean on either side, but why are there two, and what does the slash indicate? Would love good resources that explain more, too. Example chart here, from the FAA sample questions (caution: 37 MB download), Figure 20, over Southern California. I’m also interested in knowing what a dot with R underneath means.