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Mon, 24 May 2021 19:04:08 +0000 Received: by kubenode588.mail-prod1.omega.bf1.yahoo.com (VZM Hermes SMTP Server) with ESMTPA ID 8a0ba05f8329a0084263460b51efc705; Mon, 24 May 2021 19:04:05 +0000 (UTC) Subject: Re: [FlyRotary] Re: Best way to get air out of Renesis coolant passages To: Rotary motors in aircraft References: Message-ID: <0462bda2-26a9-18cf-6322-79a6a40e3fd2@verizon.net> Date: Mon, 24 May 2021 15:04:01 -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="------------70E4F048D415C81EDA14CB76" Content-Language: en-US X-Antivirus: Avast (VPS 210523-4, 05/23/2021), Outbound message X-Antivirus-Status: Clean X-Mailer: WebService/1.1.18368 mail.backend.jedi.jws.acl:role.jedi.acl.token.atz.jws.hermes.aol Content-Length: 13910 This is a multi-part message in MIME format. --------------70E4F048D415C81EDA14CB76 Content-Type: text/plain; charset=utf-8; format=flowed Content-Transfer-Encoding: 7bit Thank you both. I just finished a search on saved messages from this list for "pump". Lots of hits on water pumps, more than an hour to read through. Was trying to see if would be worthwhile to use an aftermarket pump to replace the stock Renesis pump. Nothing definitive (no before/after measurements posted). Anyhow, came across Lynn's remark that takes two 20 minute sessions to get all air out. Also a Mazda procedure of running at 2,000 then 3,000 RPM, but warning to watch for rising temps. In my simple installation the 5/16" outlet on top of the engine goes to my reservoir. I installed a 1/16" restrictor there to prevent excessive flow from that engine high pressure point to the reservoir, somewhat bypassing radiators. Perhaps too much of a restriction making it take too long to get all air out. Or need to make restriction removable. Perhaps I should go fly again with multiple high/low power periods to make sure all air is out to get proper readings before I switch the hoses back. Finn On 5/24/2021 12:56 PM, Bobby Hughes BHughes@qnsinc.net wrote: > > I had a high quality Schrader valve with metal cap at the top of the > engine water outlet. This helped bleed the air out during filling and > ground run. I had CHT wires clamped to each outlet and could see when > the air purged from each radiator. > > Bobby > > *From:*Rotary motors in aircraft [mailto:flyrotary@lancaironline.net] > *Sent:* Monday, May 24, 2021 11:49 AM > *To:* Rotary motors in aircraft > *Subject:* [FlyRotary] Re: Best way to get air out of Renesis coolant > passages > > Finn > > I had a RX7 engine with two A/C cores for radiators, but here is what > I found worked > > 1. Fill as best as possible, then use aircompressor to take it to > operating pressure while cold > > 2. Run engine up to operating temperature, using highest revs possible > on ground when warm > > 3. While hot, bleed air pressure from system, when cool, replenish > reservoir > > 4. Repeat at least once, then go fly, and check after flight to replenish. > > On Mon, May 24, 2021 at 10:40 AM Finn Lassen finn.lassen@verizon.net > > wrote: > > Is there a best way to get air out of Renesis coolant passages? > > Like running engine at a certain RPM? > > Repeated heating/cool-down periods? > > Trying to determine reason for higher coolant temperature drop over > right radiator vs left radiator. > > I tried swapping hoses from engine to rads (one has a 90 degree > bend). > But am concerned that there may be air trapped in the system > leading to > incorrect comparison readings. > > Finn > > > --- > This email has been checked for viruses by Avast antivirus software. > https://www.avast.com/antivirus > > > -- > Homepage: http://www.flyrotary.com/ > Archive and UnSub: > http://mail.lancaironline.net:81/lists/flyrotary/List.html > > > > *Disclaimer* > > The information contained in this communication from the sender is > confidential. It is intended solely for use by the recipient and > others authorized to receive it. If you are not the recipient, you are > hereby notified that any disclosure, copying, distribution or taking > action in relation of the contents of this information is strictly > prohibited and may be unlawful. > > This email has been scanned for viruses and malware, and may have been > automatically archived by *Mimecast Ltd*, an innovator in Software as > a Service (SaaS) for business. Providing a *safer* and *more useful* > place for your human generated data. Specializing in; Security, > archiving and compliance. To find out more Click Here > . > --------------70E4F048D415C81EDA14CB76 Content-Type: text/html; charset=utf-8 Content-Transfer-Encoding: 8bit
Thank you both.

I just finished a search on saved messages from this list for "pump". Lots of hits on water pumps, more than an hour to read through. Was trying to see if would be worthwhile to use an aftermarket pump to replace the stock Renesis pump. Nothing definitive (no before/after measurements posted).

Anyhow, came across Lynn's remark that takes two 20 minute sessions to get all air out. Also a Mazda procedure of running at 2,000 then 3,000 RPM, but warning to watch for rising temps.

In my simple installation the 5/16" outlet on top of the engine goes to my reservoir. I installed a 1/16" restrictor there to prevent excessive flow from that engine high pressure point to the reservoir, somewhat bypassing radiators. Perhaps too much of a restriction making it take too long to get all air out. Or need to make restriction removable.

Perhaps I should go fly again with multiple high/low power periods to make sure all air is out to get proper readings before I switch the hoses back.

Finn

On 5/24/2021 12:56 PM, Bobby Hughes BHughes@qnsinc.net wrote:

I had a high quality Schrader valve with metal cap at the top of the engine water outlet. This helped bleed the air out during filling and ground run. I had CHT wires clamped to each outlet and could see when the air purged from each radiator.

 

Bobby

 

From: Rotary motors in aircraft [mailto:flyrotary@lancaironline.net]
Sent: Monday, May 24, 2021 11:49 AM
To: Rotary motors in aircraft
Subject: [FlyRotary] Re: Best way to get air out of Renesis coolant passages

 

Finn

I had a RX7 engine with two A/C cores for radiators, but here is what I found worked

1. Fill as best as possible, then use aircompressor to take it to operating pressure while cold

2. Run engine up to operating temperature, using highest revs possible on ground when warm

3. While hot, bleed air pressure from system, when cool, replenish reservoir

4. Repeat at least once, then go fly, and check after flight to replenish.

 

On Mon, May 24, 2021 at 10:40 AM Finn Lassen finn.lassen@verizon.net <flyrotary@lancaironline.net> wrote:

Is there a best way to get air out of Renesis coolant passages?

Like running engine at a certain RPM?

Repeated heating/cool-down periods?

Trying to determine reason for higher coolant temperature drop over
right radiator vs left radiator.

I tried swapping hoses from engine to rads (one has a 90 degree bend).
But am concerned that there may be air trapped in the system leading to
incorrect comparison readings.

Finn


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