2011 compressor

Veteran team needs a compressor.
Where do I get a new compressor? The pneumatics manual lists the provider but I can’t find them listed in any link.
Bruce

The Viair 090C Air Compressor is popular with off roaders. A simple Google search will reveal many different places to purchase one.

such as:

http://www.knowwhere2jeep.com/catalog/product_info.php?manufacturers_id=318&products_id=10990

http://www.rjroffroad.com/viair-090c-air-compressor-kit-with-external-check-valve-9-duty-offroad-pr-17608.html

Try 4wheelsonline.com they have it for $59.63 delivered

Does anyone have any experience with these new compressors?

And how do these compressors compare to the old ones?

These compressors look great…are they legal this year?

The specs are much better on the new ones. 1.3 cfm versus 0.8 cfm, looking at the spec sheets for both they’re consistently better on the new one.

http://www.gd-thomas.com/product.aspx?id=12084&tp=p

Edit:

Yes, they’re legal. <R69>

Loving the specs at the first site. Startup and refill pressurization times are impressive for half-gallon tank. Have not got the chance to evaluate the new storage cylinder. Only one port so saving a plug that sometimes caught the ziptie hold-down. Gotta re-think the mounting for this puppy.

I haven’t had experience with the new one, but here’s a spec comparison:

Viair 090C 90 Series Air Compressor
*12-Volt
*Permanent Magnetic Motor
*Duty Cycle: 9% @ 100 PSI
*Max. Working Pressure: 120 PSI
*Inline Check Valve
*Amp Draw: 10 Amps
*Dimensions: 6.00” L x 2.10” W x 4.30” H
*Net Weight: 2.50 lbs.
*1.03 CFM at 0 PSI
*0.43 CFM at 90 PSI
*0.34 CFM at 120 PSI

Thomas Industries 405ADC38/12
*12-Volt
*Amp Draw: 10.5 Amps
*MAX. PSI CONT./INT. 100/100
*0.79 CFM at 0 PSI
*0.41 CFM at 40 PSI
*0.24 CFM at 100 PSI
*Diamensions: 7.50" L x 4.25" W x 5.375" H
*Motor: Shaded Pole, Thermally Protected with High Torque Start Winding
*Net Weight: 5.40 lbs

Huge weight savings to be sure!

can someone point me to a rule which prohibits the use of a previous compressor. (ie. are we forced by a rule that requires us to use the new compressor? ) and if so…what rule?

The Pneumatics manual calls out that veteran teams can legally use the compressor from past years KOP. Rookie teams have been provided the newer compressor, which veteran teams can acquire and use at their own cost.

http://www.usfirst.org/uploadedFiles/Robotics_Programs/FRC/Game_and_Season__Info/2011_Assets/Kit_of_Parts/2011_FIRST_Robotics_Competition_Pneumatics_Manual.pdf

Is there no official FIRST place to purchase one of these??
Bruce

Isn’t it 1.03cfm on the new compressor? <R69> forbids anything more powerful than that.

I think some of the difference is accounted for by the Viair compressor being rated at a supply voltage of 13.8V vs the old compressor at 12V.

This is at 13.2 volts

Our team ordered the 90C compressor from rjroffroad and the website says 1.03 cfm, but the one we received has .88 cfm printed on the compressor, but the box says it is the 90C. Has any one else come across this?

.88 cfm is suspiciously close to the viar specs scaled for 12 volts instead of 13.8 volts.

The Viair compressors we just received also have the lower rating printed on the side. We ran a side by side comparison between the Viair and the old Thomas compressor filling up a giant Bimba cylinder to the point it was fully extended. I don’t have the data in numerical form but subjectively the Thomas was substantially faster. This would be a 0 PSI test. It was running straight from a FRC-style battery.

Sorry for the lack of solid data here but the point is that teams should run their own tests to see if the Viair what they need it to do.

The ones were ordered were supposed to be 90Cs but, like the previous poster, the specs printed on the compressor didn’t match the web. Maybe it’s a voltage thing or maybe something else. The number on the compressor says it’s a 090 but doesn’t include a “C”.

Could someone with a KOP Viair post the 0 PSI CFM spec that’s printed on their compressor? Does your’s say it’s a 090C or just 090?

Is the new compressor for 2011 season as durable as the old compressor? Does anyone know of any problems with it?

Not even close. The duty cycle is really low, around 9%. We burnt one out in 1 regional during Final 1-3 at the WPI regional last year and its failure vented the pnuematics on our robot essentially preventing us from playing in the match after 30 seconds. The compressor had been new at the begining of the practice day.

Make sure you have plenty of storage on board so the compressor has time to cool off.