[NSRCA-discussion] Perry VP30 Question

[Richard Lewis]

Way back, I spent some time on the phone with the guy at Conley presicion about the pressure line.  He seemd to think that the large displacement OS160 and Moki 180 that we were discussing would have no problem stroking the pump on a longer pressure line made from normal fuel line.  My experiences have seemed to confirm this.  Remember, he markets primariliy to rc car applications and the crankcase pressure pulse from a 15 sized engine turning 20,000 rpm may easily be absorbed in the ballooning effect of a long rubbery line, but the pulse from 1.6 turning 8000 rpm, not so much...If you want to use a less flexible line, Tygon is what you would use...

The real trick is getting any tubing to stay on the un-barbed nipple on the back of the pump....sometimes it stay on like magic and is never an issue, other times not so much...I've used goop, CA, Silicone, wire ties, etc...the propensity to come loose seems to be directly proportional to the diffculty in accessing it to re-attach it...:)

Richard




________________________________
From: "Pascoe,Tim [Burlington]" <Tim.Pascoe at ec.gc.ca>
To: General pattern discussion <nsrca-discussion at lists.nsrca.org>
Sent: Wed, February 17, 2010 10:47:34 AM
Subject: Re: [NSRCA-discussion] Perry VP30 Question

John,

    What type of fuel line should I be using here? From the replies,
I think I can safely mount the pump in any orientation, so getting it
close to the pressure tap will be easier. I was, however, intending on
using standard fuel line for all the connections.

Tim Pascoe 

-----Original Message-----
From: nsrca-discussion-bounces at lists.nsrca.org
[mailto:nsrca-discussion-bounces at lists.nsrca.org] On Behalf Of John
Ferrell
Sent: Wednesday, February 17, 2010 11:45 AM
To: General pattern discussion
Subject: Re: [NSRCA-discussion] Perry VP30 Question

The length of the line to the crank case is critical. Closer is better.
And 
don't even think of using standard fuel line for that line.

John Ferrell  W8CCW

"A nation of sheep will beget a government of wolves."
-Edward R. Murrow
----- Original Message ----- 
From: "Pascoe,Tim [Burlington]" <Tim.Pascoe at ec.gc.ca>
To: <nsrca-discussion at lists.nsrca.org>
Sent: Monday, February 15, 2010 10:53 PM
Subject: [NSRCA-discussion] Perry VP30 Question


>
> I'm putting together a practice plane with an OS1.60, including a
Perry 
> VP30 pump. I've never used a Perry pump before, and am wondering about
the 
> mounting instructions. It says to ensure that the inflow/outflow
nipples 
> are mounted horizontally, with the bleed hole down. However, I'm
finding 
> it tough to get a place near the engine where I can mount it this way.
>
> 1) Does it have to be close to the engine (can I mount it inside the
fuse 
> behind the firewall by 4-5 inches)?
> 2) Can I mount it with the inflow/outflow vertical, and closer to the 
> engine?
>
> Thanks,
>
> Tim
> _______________________________________________
> NSRCA-discussion mailing list
> NSRCA-discussion at lists.nsrca.org
> http://lists.nsrca.org/mailman/listinfo/nsrca-discussion
> 


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