CT33 with Boom Arm

[Dave Ronyak]

I do have a question about your vac hose setup.  I notice you have your smaller hose (27mm) connected to your vac. The larger 36mm hose is added to reach your tools.  I'm currious.  I learned in fire school about starting at pump with 6" hose/line to 4"lline to 2" line to 1" line.  I have not studied about suction, but it would seem to me that it might work best if you reversed the setup so your larger hose is closest to the suction.  Have you researched this idea? 
Tinker

Tinker,  I believe your thoughts about hose size are correct.  Oneida recommends doing much the same with sizing of long ducting runs - biggest diameter duct nearest the vacuum machine.  You're going to get fluid frictional losses in any ducting run, even if the ducting is perfectly straight, perfectly sealed, perrfectly polished and clean.  The longer the run, the more the loss.  After some distance from the vacuum source, you might as well reduce the size of the duct because the bigger duct is not providing increased flow capacity, it is just adding to cost and weight.

Dave R.

 

[Brent]

Thanks for all the help guys. I pulled the plug and ordered the arm, and a few other things, from Dan Clermont last night.