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Shame we can't use the airconditioner tech method...
I bought this years ago, and surprised how much it gets used and borrowed.
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.
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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