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Date: Thu, 03 Feb 2005 11:29:39 -0500
From: Ernest Christley <echristl@cisco.com>
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To: Rotary motors in aircraft <flyrotary@lancaironline.net>
Subject: Re: [FlyRotary] Re: Moroso Oil Pans for 13B
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Russell Duffy wrote:

> Or, you could spend the same amount of money and order a 
> custom aluminum finned oil pan from Perry Mick (yes, it is finned both 
> inside and outside). 
> See pics.  Paul Conner
>  
> The finned pan is another one of those ideas that absolutely must 
> work, but leaves a big question of just how much good it does.   I 
> have to admit that I've been trying to figure a way to put an 
> oil/water cooler in the new pan, or maybe some fins...
>  
> Rusty (still would like to use the small oil cooler) 

How much good will it do?  Just like we're discussing with the rotors, 
5% here...10% there, and all of a sudden a marginal system turns into a 
performer.  I can't believe a few fins would put the weight on par with 
the steel monstrosity that Mazda provides.

I've been considering a finned aluminum pan for a while (you know it 
takes a lot of planning to design a pan that won't fit in your mount, 
Paul 8*).  I've been leaning to buying a slab of heatsink material.  
There is a class of products that feature a high density fin composed of 
folded aluminum or copper sheet.  The base of these sinks tend to be 
fairly thick for some reason, but it looked like it would be fairly 
simple to weld on some sides and a flange (except that I don't have the 
equipment to weld aluminum).

My other investigation has been to weld up a pan out of .035 4130 and 
then rivet a heatsink on as the base.  This is attractive since I've 
developed very good skills welding thinwall 4130.  Differential 
expansion, dissimilar metals, corrosion resistance of 4130...lots of 
questions about this approach.

My other oil pan solution is to just weld a patch over the piece that I 
had to cut off to make way for my mount.  But I'm really hoping to loose 
some of the weight from that thing.

If it would fit, Perry Mick's pan would be the simplest solution.