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Tractorsport Flowbench Forum Archive • View topic - Pitot style in progress...
Page 1 of 1

PostPosted: Sat May 01, 2004 2:55 am
by What
Here is the bench that I'm working on. Basically as simple as it gets. 2" pipe to keep velocities high and 10 times diameter rule after bends/restrictions/before and after pitots. The only bend is a 90 degree to go up to the top of the bench. Unfortunately I don't really have any more room in my garage to go side-ways, besides cutting through existing benches which may have worked... but either way, I still decided to have longer section of pipe go up. If I hadn't already drilled holes in the side of the vac box, I would have put a couple of 90s on the bottom of the box after the casters were on instead of the straight pipes to lower the working side of the bench down where I was originally thinking it would be... as it is now, I have to build a small working step. The last pictures makes it look like less room then there is for a guys head. With the casters on the vac box it's easily moveable to reverse direction of flow.

I had originally planned for 4 or so vacuum motors and I kept having shop vacs donated so I kept adding them. Most of the motors are different, so it will take a little longer setting up the bench in that respect, but I should have various ranges to choose from. I read about someones bench built with MDF 'blowing' up when accidentally sealed it one day, so I added enough bracing to prevent it from happening even if I left my hand over the pipe all day (or so I figure).

Still working on manometers and adapter plates and such, but I'll post a few more of those come time.

I should actually take a few minutes one day and put this on a web page and link to it, instead of having it all in one post.

PostPosted: Sat May 01, 2004 2:56 am
by What
Image

Image

PostPosted: Sat May 01, 2004 3:00 am
by What
Image

Image

PostPosted: Sat May 01, 2004 3:03 am
by What
Just thought I'd clean up the old pics and put these in.
All old pics can be seen here on this web page instead. No dialog at the moment, but I will try to do so when I have more time.




I will end up changing aspect ratio of vertical manometer and marking everything off once I get comfortable with the pitot tubes and as I get comfortable with how I am going to do the tests.

Have to bring over another circuit for the last motor as I've only played with a max of 6 of them. Starts sounding like it's going to take off as you turn more of them on and the air starts to really move out of there.

Seeing as I have vac motors from different shop/industrial shop vacs I borrowed an ammeter from the father-in-law and so far the little craftsman "2hp" motor seems to draw little current (under 7 amps) but provide similar flow and depression to the couple that are drawing 11-12amps.