Recent content by jonnycowboy

Unfortunately I can't as it is not solid aluminium but an extrusion with a specific shape (similar to T-slot).

Great, concise answers. I'll think of something else, Thanks!

Hi all, I am looking into an application of an "unfortunate" square-peg-in-a-round-hole. I need to fit a 40-mm square extrusion into a 50mm ID bearing. The application is low speed, <500RPM with low loads (robotic arm). I am looking into turning (lathe) the square 40mm extrusion so that I end...

pmrobert, another great idea, thanks!!

No vanes. This might help you: http://scarbsf1.wordpress.com/2011/05/19/toro-rosso-radiator-layout/

I am doing both pitot and AOA in a single probe. AOA will be measuring the pressure difference between the bottom and the top probes (known as a smart probe). That's good information for the edge effects, I was just going to bevel the edges of the holes but I'll take a look at detailed...

I never thought of using a tube insert, that's a really good idea. I guess I would bond it in? Or simply heat the big tube, chill the small one and insert it with a small interference fit? Testing: intially calibrated in freestream (ie: outside) and then in a wind tunnel.

No it's for AOA probe use. NACA report 1364 shows that small pressure ports are the most effective (0.020"-0.030" generally). That's tiny, I know and unfortunately I won't be able to do it on my lathe, I'll need to use EDM drilling. Unless you have experience otherwise, that using a small...

I found something: http://www.beswick.com/products/product_details.php?pid=8 The flow-through size is a bit bigger than I hoped but I think it'll be OK.

The pressure will be low (total and dynamic pressure measurements), my sensors are capable of 0-30psia max. I have found some threadable ports but they have M5 threads, that's too big. I was hoping for M3 (or similar imperial size) with 0.025" holes.

Hi all, I'm looking for a threadable pressure port, the smallest possible. The pressure sensing and "working" lines have very small diameters (~20 thou "). I need the sense line to be 90 degrees to the "working" line I'm wondering if I have to use something fairly large or is there something...

Hglr, thank you very much for your reponse. I don't have access to the Airbus spec however the DEI part information does mention the spec and its tolerances. We are aware of the Do-160 reqs. Thanks again!

Hi all, I'm wondering if there is a standard specifying voltage levels for aircraft use of Discrete I/Os? IE: Gnd/Open would be: gnd, logic 1 open, logic 0 logic 0 lower limit: 12VDC logic 0 upper limit: 48VDC logic 1 lower limit: -2VDC logic 1 upper limit: 5VDC? Same question for 28V/Open...

Hi, thanks for the link. I don't think however that a thin section since I will be loading the bearing with a large moment arm... thanks though!

Hi guys, I'm trying to find a single slewing ring bearing (apprx 400-500mm OD), internal gear. Everytime I call anywhere they're asking for 4-6 mnths after payment (!!). Is there anywhere (on the web, or my local bearing shop?) I could find this in stock somewhere? The application is a robotic...