From: "Finn Lassen finn.lassen@verizon.net" <flyrotary@lancaironline.net>
Received-SPF: pass
 receiver=logan.com; client-ip=66.163.186.146; envelope-from=finn.lassen@verizon.net
Subject: Re: [FlyRotary] Re: How to search the flyrotary archives
To: Rotary motors in aircraft <flyrotary@lancaironline.net>
References: <list-709957@logan.com>
Message-ID: <a24d8384-f085-2df4-896c-95f2ff787eba@verizon.net>
Date: Sat, 26 Feb 2022 22:47:51 -0500
User-Agent: Mozilla/5.0 (Windows NT 5.1; rv:52.0) Gecko/20100101
 Thunderbird/52.9.1
MIME-Version: 1.0
In-Reply-To: <list-709957@logan.com>
Content-Type: text/plain; charset=utf-8; format=flowed
Content-Transfer-Encoding: 7bit
Content-Language: en-US
Content-Length: 2078

On 2/26/2022 9:48 PM, Charlie England ceengland7@gmail.com wrote:
> On 2/26/2022 8:33 PM, Finn Lassen finn.lassen@verizon.net wrote:
>> I need help on how to search the archives.
>>
>> There are two boxes: Filter and Search.
>>
>> How does one use those?
>>
>> (specifically I'm looking for posts by Bill Shertz (sp?) about 
>> coolant flow, (probably before April 2010 when I started storing all 
>> posts locally).
>>
>> Finn
> I confess I've never understood how to use those boxes either. Looking 
> forward to a tutorial.
>
> Charlie
>
Me too.

I found the posting I was looking for stored locally. "alternative 
waterpump" thread from 6 May 2010 through 16 May 2010. Specifically 
Bill's post on 12 May with picture of pump tests attached.

One thing I had not considered in my flow testing is pressure drop vs 
flow. However, in theory (as I understand it) when measuring flow using 
pitot tube, pressure drops through the system doesn't matter, flow is 
flow. However, the theory 
(https://www.engineeringtoolbox.com/velocity-head-d_916.html) does not 
seem to match my testing all that well. Perhaps density of 50/50 
antifreeze is significantly less than that of pure water, and I should 
have drained the system completely and used pure water?

I did order the garden hose flow sensor and will try measuring flow from 
garden hose through the two home made pitot flow sensors and the garden 
hose sensor when I get it.

Anyway, at this point I'm fairly satisfied I have sufficient coolant 
flow, reasonably balanced between the two rads and can remove the flow 
sensors and get back to improving left rad ducting using the pencil 
camera looking at tufts in the duct. One thing I haven't figured out is 
how to shape duct inlet extension so it will capture air in climb 
attitude and direct it evenly to top and bottom of the rad surface. From 
pressure readings in front of the rad it looks like it hits the top of 
the duct, bounces and most of the air goes to the bottom, even with a 
very aggressive narrowing at the bottom. I guess vanes come to mind ...

Finn