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deskpilot
11-24-2008, 12:31 PM
One of you guys is bound to know...what is the purpose of the tube extending forwards from near the tip of the left wing if the yak3? My guess would be it's for measuring air speed or some such but I'm probably wrong. Fabulous plane in my humble opinion by the way. Love flying it in the sim.

deskpilot
11-24-2008, 12:31 PM
One of you guys is bound to know...what is the purpose of the tube extending forwards from near the tip of the left wing if the yak3? My guess would be it's for measuring air speed or some such but I'm probably wrong. Fabulous plane in my humble opinion by the way. Love flying it in the sim.

Art-J
11-24-2008, 02:04 PM
You're very very right, mate http://forums.ubi.com/groupee_common/emoticons/icon_biggrin.gif. It's a Prandtl tube, or as called by aviators - Pitot tube, simply put: a device that measures total and static pressure of air moving around the airplane. Difference between those two values (called dynamic pressure) is used to calculate airflow velocity and thus gives us indicated airspeed value. Very simple and effective thingy, the only major problem with it is the fact, that it doesn't take air density changes into account (so the higher you fly, the bigger the difference between indicated and true airspeed actually is), although engineers learned to deal with it.

You can spot the tube on every plane - on fighters, leading edge was indeed a very popular place to mount it (with few exceptions, i.e. Spits, Mustangs, Lightnings), on bombers, it was also mounted on the fuselage.

Cheers - Art

K_Freddie
11-24-2008, 04:01 PM
wiki (http://en.wikipedia.org/wiki/Pitot-static_system)

deskpilot
11-25-2008, 11:37 AM
Thank you both. very helpful.