John,
Below you mention using “small Earl's in-line filters with the conical (brass?) filter blocks.” These sound like the sintered bronze filters that Tracy recommends not using as they become blocked more easily than mesh screens. The sintered bronze is also hard to see if blocked, which it sounds like you experienced.
Earl’s has one type of filter that comes in either sintered bronze or stainless steel mesh (field cleanable). Here’s a link that describes the stainless steel mesh version:
http://www.importevolution.com/product_info.php?products_id=3465
<000901c61592$c6983470$2402a8c0>
Chris
-----Original Message-----
From: Rotary motors in aircraft [mailto:flyrotary@lancaironline.net]On Behalf Of John Slade
Sent: Monday, January 09, 2006 9:34 AM
To: Rotary motors in aircraft
Subject: [FlyRotary] Earls in-line fuel filters
I've been having fuel flow problems on one side for a while.
Runup would give me full static on either pump. I take off on both.
Some time later in the flight here's what happens:
I'm be running on left pump only
I increase throttle to climb
mixture goes off the scale lean
engine falters
I switch on the right pump (which feeds from a separate tank), mixture comes back up and engine runs normally.
I have the small Earl's in-line filters with the conical (brass?) filter blocks. They always "look" clean when I take them apart, but yesterday I tried blowing through them. They were very restrictive, especially the left one. After I clean them with high pressure air they flow much better, but I'm beginning to think these filters are not good for our purpose. They're too small and too easily blocked. Additionally there's no nut on the center section so they're hard to get apart at both ends.
I think I'll get larger canister type filters with a drain like Buly's. Buly - where did you get those? Got a part number?
Anyone else have a filter part number they can suggest?
John
Turbo Rotary Cozy IV
47.5 hrs.