flyrotary@lancaironline.net Mailing List Archive

Thanks for your reply Russell, It's amazing how something makes so much sense once someone explains it to you. So please explain the port you are referring to on the front iron of the 13b. Is it the one right next to the CAS (crank angle sensor) if so it would appear that mine has some kind of plug that would have been factory installed. There is also a port in the rear iron, the one nearest the flex-plate that I tapped with a 1/8 npt if I remember correctly and plugged it. Is it possible to use this port, or is it to small for a supply line to the re-drive? -------------- Original message ---------------------- From: "Russell Duffy" <rusty@radrotary.com> The Mazda manual shows the oil being cooled via the oil cooler before it is filtered. One would assume that you would want the oil filtered before you ran it through anything. Why did they design it this way? What are most doing? Are you cooling the oil before filtering or are you filtering the oil before cooling? The passages in the oil cooler are huge by comparison to bearings in the engine, so it makes better sense to filter the oil just before it gets to the oil passages in the engine. If one was to stick to the original design and utilize the original oil pressure outlet as the oil supply feed to the re-drive, it would appear that this oil supply to the re-drive is un-filtered oil although the oil is cooled. I would assume that we would want filtered oil to the re-drive. I am not sure how to tackle this problem. Any and all input into this subject is greatly appreciated. Many of these oil filter adapters that have recently been pictures have threaded outlets for pressure and/or temp sensors that are after the filter. These can be used for the redrive supply. The 13B has a port on the top, plug side of the front iron housing, that can be used. I'm not familiar with the Renesis, but I'm sure it's got something that can be used. I don't think this will be your biggest problem :-) Cheers, Rusty

From:	Russell Duffy <rusty@radrotary.com>
Subject:	[FlyRotary] Re: What comes first; the chicken or the egg?
Date:	Mon, 7 Apr 2008 00:33:39 +0000
To:	Rotary motors in aircraft <flyrotary@lancaironline.net>

Message

The Mazda manual shows the oil being cooled via the oil cooler before it is filtered. One would assume that you would want the oil filtered before you ran it through anything. Why did they design it this way? What are most doing? Are you cooling the oil before filtering or are you filtering the oil before cooling?

The passages in the oil cooler are huge by comparison to bearings in the engine, so it makes better sense to filter the oil just before it gets to the oil passages in the engine.

If one was to stick to the original design and utilize the original oil pressure outlet as the oil supply feed to the re-drive, it would appear that this oil supply to the re-drive is un-filtered oil although the oil is cooled. I would assume that we would want filtered oil to the re-drive. I am not sure how to tackle this problem. Any and all input into this subject is greatly appreciated.

Many of these oil filter adapters that have recently been pictures have threaded outlets for pressure and/or temp sensors that are after the filter. These can be used for the redrive supply. The 13B has a port on the top, plug side of the front iron housing, that can be used. I'm not familiar with the Renesis, but I'm sure it's got something that can be used.

I don't think this will be your biggest problem :-)

Cheers,

Rusty