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Kurt Haller RV-9A
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Date:  7-5-2011
Number of Hours:  40.00
Manual Reference:  7
Brief Description:  Pitot tube

No, haven't bought a time machine. Haven't been logging over past month or so because I got a new toy: a Little Machine Shop Mini-lathe. Forty hours is the (conservative) estimate for how long I've been designing and building an unheated pitot/AOA tube. modeled from the Dynon probe and discussions on VAF stating that the angle between pitot and AOA was about 60 deg.

Added 10 Sep 2011: Adding pictures of the pitot tube. Haven't been working on the plane most of the summer due to work busy-ness--taking some time off!

Image 1 has the tube taped up to fill in the back lower corner of the pitot tube where it meets the stub of streamlined tubing. Also cut a piece of rigid styrofoam and epoxied to the front upper corner to form a fairing. A layer of JB-Weld is curing and will be shaped and sanded smooth.

Image 2: the business end, turned from 6061 round bar stock.

Image 3: top of the mast (it has been primed). Welding the tube to the 0.032 6061 plate was tricky for Karl, but after a few trial runs and a jig to draw excess heat away, it came out great.
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Mast and pitot tube

Mast and pitot tube

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Pitot and AOA port close up

Pitot and AOA port close up

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TIG weld, mast to mounting plate

TIG weld, mast to mounting plate

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