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Sat, 21 Aug 2021 12:04:09 +0000 Received: by kubenode547.mail-prod1.omega.bf1.yahoo.com (VZM Hermes SMTP Server) with ESMTPA ID 5fb65f4703f62db41577c44099bdf527; Sat, 21 Aug 2021 12:04:06 +0000 (UTC) Subject: Re: [FlyRotary] Re: Coolant flow sensors To: Rotary motors in aircraft References: Message-ID: Date: Sat, 21 Aug 2021 08:04:02 -0400 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: Content-Type: multipart/alternative; boundary="------------4024843BB1444E61BD003A39" Content-Language: en-US X-Antivirus: Avast (VPS 210821-2, 08/21/2021), Outbound message X-Antivirus-Status: Clean X-Mailer: WebService/1.1.18906 mail.backend.jedi.jws.acl:role.jedi.acl.token.atz.jws.hermes.aol Content-Length: 9489 This is a multi-part message in MIME format. --------------4024843BB1444E61BD003A39 Content-Type: text/plain; charset=UTF-8; format=flowed Content-Transfer-Encoding: 8bit Thank you Steve. Exactly what I need. I can make those. What were the approximate pressures? On a related note, what is the 15F coolant temp deltas you mention based on? 35 gpm coolant flow cooling 180 HP? I keep wondering where the 35 gpm comes from. Mainly by reducing oil cooler exit air area, I'm now down to 200F @130 mph @ about 4,000' density altitude and 70F OAT. Can climb at full power to about 1,500' on a 85F day (keeping speed at 110-120 mph). Only small incremental improvements so far.. Looking for that magic change that will lower that to 180F. After working with air flow, I think I'll now circle back to coolant flow. Coolant delta over right rad still higher than left rad. Am thinking of hooking up a garden hose to rad inputs and see how quickly 5 gal buckets will fill up from each rad output But 35 gpm is a lot more than a garde n hose can supply? But flow sensors should give better real world results.. Finn On 8/21/2021 1:56 AM, Steven W. Boese SBoese@uwyo.edu wrote: > Finn, > > I used pitot static sensors to test the distribution of coolant flow > between two parallel plumbed radiators.  Absolute flow rates can be > calculated using your own calibration or referencing differential > pressure vs flow velocity data found online. > >  The sensor was constructed by soldering 1/16" od copper tubing into > 3/4" copper tubing. > > Steve Boese > > ------------------------------------------------------------------------ > *From:* Rotary motors in aircraft on > behalf of Finn Lassen finn.lassen@verizon.net > > *Sent:* Wednesday, August 18, 2021 2:47 PM > *To:* Rotary motors in aircraft > *Subject:* [FlyRotary] Coolant flow sensors > ◆ This message was sent from a non-UWYO address. Please exercise > caution when clicking links or opening attachments from external sources. > > > Any suggestions for reasonably priced flow sensors to be inserted in > 3/4" hoses that won't produce a significant flow restriction? > > Finn > > > > -- > Homepage: http://www.flyrotary.com/ > Archive and UnSub: http://mail.lancaironline.net:81/lists/flyrotary/List.html --- This email has been checked for viruses by Avast antivirus software. https://www.avast.com/antivirus --------------4024843BB1444E61BD003A39 Content-Type: text/html; charset=UTF-8 Content-Transfer-Encoding: 8bit
Thank you Steve. Exactly what I need. I can make those.

What were the approximate pressures?

On a related note, what is the 15F coolant temp deltas you mention based on?
35 gpm coolant flow cooling 180 HP?

I keep wondering where the 35 gpm comes from.

Mainly by reducing oil cooler exit air area, I'm now down to 200F @130 mph @ about 4,000' density altitude and 70F OAT. Can climb at full power to about 1,500' on a 85F day (keeping speed at 110-120 mph). Only small incremental improvements so far.. Looking for that magic change that will lower that to 180F.

After working with air flow, I think I'll now circle back to coolant flow. Coolant delta over right rad still higher than left rad. Am thinking of hooking up a garden hose to rad inputs and see how quickly 5 gal buckets will fill up from each rad output But 35 gpm is a lot more than a garde
n hose can supply?

But flow sensors should give better real world results..

Finn

On 8/21/2021 1:56 AM, Steven W. Boese SBoese@uwyo.edu wrote:
Finn,

I used pitot static sensors to test the distribution of coolant flow between two parallel plumbed radiators.  Absolute flow rates can be calculated using your own calibration or referencing differential pressure vs flow velocity data found online.  

 The sensor was constructed by soldering 1/16" od copper tubing into 3/4" copper tubing. 

Steve Boese   

From: Rotary motors in aircraft <flyrotary@lancaironline.net> on behalf of Finn Lassen finn.lassen@verizon.net <flyrotary@lancaironline.net>
Sent: Wednesday, August 18, 2021 2:47 PM
To: Rotary motors in aircraft <flyrotary@lancaironline.net>
Subject: [FlyRotary] Coolant flow sensors
 
◆ This message was sent from a non-UWYO address. Please exercise caution when clicking links or opening attachments from external sources.


Any suggestions for reasonably priced flow sensors to be inserted in
3/4" hoses that won't produce a significant flow restriction?

Finn



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