compressor is heating up to the point it blows hose

[GeeTwo]

Originally Posted by ebarker

Basic Chemistry / Gas Laws

PV = nRT

Boyle's Law caused us a bit of a search for a leak one year. We filled up the tanks, and a few seconds later, the compressor started again when the air cooled a bit and the pressure dropped.

[ArtemusMaximus]

Originally Posted by Mr V

I don't know what the maximum on time is for the Thomas but somewhere I saw that the Viar was rated for a max on time of 3min. So a ~30 sec initial charge time, a few minutes of rest, 2.5 minutes of cycling on and off during the match and ~30 minutes between matches puts it in its intended duty cycle.



Personally the fact that Viair rates theirs at 9% makes me trust their specs more and the fact that Thomas rates theirs at 10% makes me suspicious of their specs. Fact is that real world numbers rarely come out so nice so Viair advertising 9% makes me think it is based on actual data determined by real world testing w/o rounding it up to 10% which would look better on the data sheet.

Spec sheet for Thomas states 3 minutes on - 30 minutes off @ 23°C
http://www.gd-thomas.com/workareasho....aspx?id=24872

[Al Skierkiewicz]

Art,
Can you tell us which compressor you are using?

[ArtemusMaximus]

Originally Posted by Al Skierkiewicz

Art,
Can you tell us which compressor you are using?

Ah, I am not part of the team this year (few different reasons). So I am not using anything this year. Last year we were using only standard equipment that came in a tote (Viair 90C). But I did a research last year and if you remember you contributed to this thread http://www.chiefdelphi.com/forums/sh...d.php?t=129321. If i'd be still on the team I would insist to use VIAIR 250C-IG. It just make sense to me

In this thread I stepped in to address the statement that Thomas 215 had 100% duty cycle, which I knew was incorrect.

[Al Skierkiewicz]

Art,
Sorry, I was speaking to the OP, Arthur Canada.
There seems to be four compressors that everyone is using these days.
The original Thomas 415 which is heavy but a great work horse. (Top and side ports are legal)
The Viair 90C (The top port is not legal for FRC and the nickel plated check valve must be in place.)
Viair 250 (The included stainless steel hose must be attached for FRC rules)
Thomas 215 (the top and side ports are both legal to use and this compressor does not require an external check valve)

The two small compressor run very hot as there is little thermal mass to absorb the heat generated. External cooling can be applied provided no modification to the compressor is made. (Do not use the screws to mount other devices.)