Today's Message Index:
----------------------
1. 07:57 AM - Re: Compressor charging (stephen.hayne)
2. 09:41 AM - Re: Re: Compressor charging (Richard Goode)
3. 12:53 PM - Re: Compressor charging (easy_driver)
4. 01:26 PM - Foaming Oil (Jon Boede)
5. 04:04 PM - Re: Compressor charging (Ttail)
6. 07:41 PM - Re: Re: Compressor charging (Mark Bitterlich)
7. 08:07 PM - Re: Compressor charging (easy_driver)
8. 11:20 PM - Re: Re: Compressor charging (Stephen van Dijck)
Message 1
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| Subject: | Re: Compressor charging |
richard.goode(at)russiana wrote:
> I am obviously not making myself clear! I certainly would not recommend a system
of pushrods or cables going through the firewall to turn the water drain tap.
What we do is to move the entire water drain tap into the cockpit, typically
just below the pilot seat so the tap can easily be opened or closed from the
seat. Then the water drain obviously a small metal tube extends through the
floor of the aircraft. Like this, the opening and shutting of the tap is totally
positive as it would be on the firewall.
> --
After chatting with Richard a year or so ago, I did exactly this, using SS paintball
(yes, I know, from China) high pressure lines, and a swagelok valve in the
cockpit. It is awesome to release the snot from there, and to unload the compressor.
However, I have now ONCE forgotten to close the valve upon entering
the pattern. So, one has to change their flow/checklist... I also only open
the valve if going on a longer flight, not just some local work.
--------
-
Stephen Hayne, Professor, CIS, Colorado State University
666CJA
http://selfsynchronize.com/hayne/plane/cj6.asp
Read this topic online here:
http://forums.matronics.com/viewtopic.php?p=502790#502790
Attachments:
http://forums.matronics.com//files/snot_1_firewall_189.jpg
http://forums.matronics.com//files/snot_2_cockpit_valve_122.jpg
http://forums.matronics.com//files/snot_3_belly_exit_100.jpg
Message 2
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| Subject: | Re: Compressor charging |
Yes, over the years we've installed the systems on many Sukhoi and Yak; it is (almost)
full proof, and really does extend the life of the compressor, which,
in my view, is the weakest link in the M 14 engine!
RICHARD GOODE AEROBATICS
Rhodds Farm, Lyonshall, Hereford, HR5 3LW, UK
Tel: +44 (0)1544 340120 Fax: +44 (0)1544 340129
e-mail: richard.goode@russianaeros.com
www.russianaeros.com
WORLD LEADERS IN RUSSIAN SPORTING AIRCRAFT & ENGINES
In partnership with Aerometal Kft, Hungary.
-----Original Message-----
From: owner-yak-list-server@matronics.com <owner-yak-list-server@matronics.com>
On Behalf Of stephen.hayne
Sent: 11 July 2021 15:57
Subject: Yak-List: Re: Compressor charging
--> <stephen.hayne@gmail.com>
richard.goode(at)russiana wrote:
> I am obviously not making myself clear! I certainly would not recommend a system
of pushrods or cables going through the firewall to turn the water drain tap.
What we do is to move the entire water drain tap into the cockpit, typically
just below the pilot seat so the tap can easily be opened or closed from the
seat. Then the water drain obviously a small metal tube extends through the
floor of the aircraft. Like this, the opening and shutting of the tap is totally
positive as it would be on the firewall.
> --
After chatting with Richard a year or so ago, I did exactly this, using SS paintball
(yes, I know, from China) high pressure lines, and a swagelok valve in the
cockpit. It is awesome to release the snot from there, and to unload the compressor.
However, I have now ONCE forgotten to close the valve upon entering
the pattern. So, one has to change their flow/checklist... I also only open
the valve if going on a longer flight, not just some local work.
--------
-
Stephen Hayne, Professor, CIS, Colorado State University 666CJA http://selfsynchronize.com/hayne/plane/cj6.asp
Read this topic online here:
http://forums.matronics.com/viewtopic.php?p=502790#502790
Attachments:
http://forums.matronics.com//files/snot_1_firewall_189.jpg
http://forums.matronics.com//files/snot_2_cockpit_valve_122.jpg
http://forums.matronics.com//files/snot_3_belly_exit_100.jpg
Message 3
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| Subject: | Re: Compressor charging |
there is a reason why sump bottles are located near compressor heads. by moving
it away you turn the air line into a sump.
instead of reinventing a wheel - put back AD-50 charge controller. it is on the
original air system diagram.
Read this topic online here:
http://forums.matronics.com/viewtopic.php?p=502795#502795
Message 4
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New M-14P, still break-in period. Has been in the air but fighting with hig
h oil temps.
Previous flight end: 14.5L oil
(week passes)
Initial oil check: 10.5L oil
Today flight end: 13.5L
Oil is Aeroshell 120 (no W) straight mineral oil for break-in
However... knowing that my oil wasn't really 10.5L because there wasn't +1
gallon of oil in the bucket, I ran the plane for 10 minutes outside the han
gar. Carefully warmed it up to 50C oil temp 100C CHT, oil pressure 6+, not
over 7. Cowl on.
At the end of that period there was 16.5L of very aerated oil on the dipsti
ck!
Since the pressure was good and the OAT was only 80F I went flying.
On take-off the oil pressure was 6.5 (I'd turned it up the previous weekend
) and the oil temp was about 50C. T/O was performed at 760 MAP and 2600 rp
m, which was plenty enough power to get airborne.
Two circuits around the pattern and the inlet oil temp got to over 70C and
was rising very, very slowly (i.e. not stable). CHT very reasonable, 150-1
60C at 680mm MAP, 2400 rpm once I levelled off. I flew at pattern altitude
the whole time.
Oil pressure continued to drop and temperature continued to rise. After th
e next circuit in the pattern, when oil pressure was about 3.7 and temperat
ure about 77C, I landed. Oil pressure on taxi-in was 1 and temp continued
to be about 80C.
Very aerated oil on stick, "foam" is what I'd call it. Was 16.5L with all
the air in it. Doing the math, that means about 25% of the volume of the a
ir/oil mixture was air.
Brand new oil cooler. Brand new hoses. Oil dilution system has been cappe
d off.
At this point the only non-stock components in the system are: Craig Payne'
s oil filter, and a custom hose from Jill (that has a 90-degree swivel fitt
ing on each end).
Any ideas how air is getting mixed into the oil? I'm pretty sure at this p
oint that both the high temp and the pressure drop are due to the air in th
e oil but I can't understand how it's getting in there.
Next moves are to bypass the oil filter and to try a different custom oil h
ose.
I'm all ears as to any other ideas.
Jon
PS. My oil overboard tube is cut to face into the wind, but both the other
CJs in the hangar are similarly configured. It's not long enough to stick
out below the cowl and I don't think that the prop blast would be enough t
o create aeration during the initial run.
Message 5
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| Subject: | Re: Compressor charging |
Stephen, when you action your snot valve in the cockpit in valve what do you see
on your Main Air guage ... I mean what happens ?
--------
Sean Trestrail
ttail[at]internode.on.net
Read this topic online here:
http://forums.matronics.com/viewtopic.php?p=502797#502797
Message 6
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| Subject: | Re: Compressor charging |
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YXNlP8KgIFRoZSAzIGZlZXQgb2YgYWlyIGxpbmUgYmVmb3JlIHRoZSBzdGFuZGFyZCBzdW1wIGlz
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bmFsIGFpciBzeXN0ZW0gZGlhZ3JhbS4
Message 7
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| Subject: | Re: Compressor charging |
i would guess it's longer than 6 feet. and i would dare to postulate that air moving
through small diameter thin-walled tube would loose its temperature. ( design
of a heat exchanger )
but if someone wants to experiment - who am i to judge...
markbitterlich(at)embarqm wrote:
> Could you please explain that in a little more detail please? The 3 feet of air
line before the standard sump is not a sump. But if it is 6 feet long it becomes
the sump?
>
> -------- Original message --------
> From: easy_driver
> Date: 7/11/21 4:18 PM (GMT-05:00)
> To: yak-list@matronics.com
> Subject: Yak-List: Re: Compressor charging
>
>
>
Read this topic online here:
http://forums.matronics.com/viewtopic.php?p=502799#502799
Message 8
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| Subject: | Re: Compressor charging |
Hi Sean,
Nothing. The Sukhoi only had one small bottle to start the engine.
regards
Stephen
> On 12 Jul 2021, at 01:04, Ttail <ttail@internode.on.net> wrote:
>
>
> Stephen, when you action your snot valve in the cockpit in valve what do you
see on your Main Air guage ... I mean what happens ?
>
> --------
> Sean Trestrail
> ttail[at]internode.on.net
>
>
>
>
> Read this topic online here:
>
> http://forums.matronics.com/viewtopic.php?p=502797#502797
>
>
>
>
>
>
>
>
>
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