Today's Message Index:
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1. 10:23 AM - Old Adage (Wheeler North)
2. 12:14 PM - RV9-List: FS: RV9/9A Unassembled Emp Kit + Tools + Primer + Preview plans + RV9 Orndorff Videos in Vancouver, BC (Brandon Rigio)
3. 07:38 PM - Cylinder head temps (Chuck & Deanna Schieffer)
4. 08:22 PM - Re: Cylinder head temps (Kyle Boatright)
5. 11:35 PM - Re: Cylinder head temps (Ed Holyoke)
Message 1
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Once again proving the old adage that it's better to be lucky than good....
I lucked out on that transaction, as
I was expecting to have to buy a new motor for it when I bought it.
Do not archive
Message 2
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| Subject: | RV9-List: FS: RV9/9A Unassembled Emp Kit + Tools + Primer + Preview |
plans + RV9 Orndorff Videos in Vancouver, BC
After a year and a half and much deliberation I am ready to admit that I
started this project at the wrong time of my life and need to focus my
attention on other things.
I am putting my unassembled RV9 Empennage (VS spar match drilled) with
electric trim option and everything needed to complete the kit up for
sale. This includes all the hand tools needed (itemized list for
available for anyone interested), Sherwin Williams E2G973 primer and
reducer, preview plans if wanted, and the construction videos.
This is everything needed to start assembling your RV9/9A right away.
Not a single rivet pounded on this kit.
I know how much I have invested in this kit and getting geared up to
assemble it but I also recognize that I would be being helped out by the
person willing to purchase it from me; so at this point I would like to
leave it open to offers. The Kit is located in Vancouver, British
Columbia.
Thank you,
Brandon Rigio
Message 3
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| Subject: | Cylinder head temps |
Hi guys,
I have about 33 hours flown off of my 40 hours on my RV-7A at CMA. I
have a Superior O-360 with electronic ignitions and a Hartzell CS prop
with 8.5:1 pistons. I usually use full power to climb to 1000' then go
to 25"/2500 until about 2500' then level off and go to 23:/2350. My
cylinder head temps at 2500' are usually #1 & 2 about 380 to 400 degrees
with #s 3 and 4 about 415 to 420 deg on a 70 deg day. Oil temp usually
stays between 170 and 185. I was hoping during break-in the CHTs would
drop by this time. My oil consumption seems to be about 1/4th of a
quart per hour so I think the majority of my engine break-in is done. I
have sealed all the significant holes in the upper cowl pressure area
and are now considering adding the lower cowl louvers to try to get more
CHT cooling. Any thoughts from you guys who have been down this road.
Thanks,
Chuck Schieffer
Message 4
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| Subject: | Re: Cylinder head temps |
Honestly, your temperatures are not bad, and are certainly not a danger
to your engine. But, since you want to improve things, how 'bout a
little more data?
What climb speed are you using? I recommend 120 knots or more unless
you've got an obstacle to clear.
What type CHT probes are you using and where are they mounted (screw-in
probe, spark plug ring <top plugs or bottom?>, etc)?
Do you have a cylinder blocker on #1?
FYI, my 0-320 powered RV-6 typically has a peak CHT of 400 degrees or so
on #3 cylinder during climb out. Lowering the nose to achieve 120+
knots lowers it. On a hot day, #3 may reach 420 or 425. Before I
installed a cylinder blocker on #1, the temperatures on #3 were 25
degrees higher than they are today.
Kyle Boatright
----- Original Message -----
From: Chuck & Deanna Schieffer
To: rv-list@matronics.com
Sent: Wednesday, May 14, 2008 10:32 PM
Subject: RV-List: Cylinder head temps
Hi guys,
I have about 33 hours flown off of my 40 hours on my RV-7A at CMA. I
have a Superior O-360 with electronic ignitions and a Hartzell CS prop
with 8.5:1 pistons. I usually use full power to climb to 1000' then go
to 25"/2500 until about 2500' then level off and go to 23:/2350. My
cylinder head temps at 2500' are usually #1 & 2 about 380 to 400 degrees
with #s 3 and 4 about 415 to 420 deg on a 70 deg day. Oil temp usually
stays between 170 and 185. I was hoping during break-in the CHTs would
drop by this time. My oil consumption seems to be about 1/4th of a
quart per hour so I think the majority of my engine break-in is done. I
have sealed all the significant holes in the upper cowl pressure area
and are now considering adding the lower cowl louvers to try to get more
CHT cooling. Any thoughts from you guys who have been down this road.
Thanks,
Chuck Schieffer
Message 5
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| Subject: | Re: Cylinder head temps |
Chuck,
One thing to think about; when you pull the throttle for your initial
power reduction, you come off the carb's enrichener circuit and it runs
somewhat leaner. This may be contributing to higher CHTs during climb.
What are your EGTs doing when you pull?
It might be better to leave the throttle forward and come back about 100
RPM on the prop, if you want to lower the noise level, for climbout
until you are ready to reduce power for cruise.
That said, the temps do seem a little high for a cool day. Are you sure
of your ignition timing? As has been said, a little higher climbout
speed makes a difference in temps, also.
Pax,
Ed Holyoke
Chuck & Deanna Schieffer wrote:
> Hi guys,
> I have about 33 hours flown off of my 40 hours on my RV-7A at CMA. I
> have a Superior O-360 with electronic ignitions and a Hartzell CS prop
> with 8.5:1 pistons. I usually use full power to climb to 1000' then
> go to 25"/2500 until about 2500' then level off and go to 23:/2350.
> My cylinder head temps at 2500' are usually #1 & 2 about 380 to 400
> degrees with #s 3 and 4 about 415 to 420 deg on a 70 deg day. Oil
> temp usually stays between 170 and 185. I was hoping during break-in
> the CHTs would drop by this time. My oil consumption seems to be
> about 1/4th of a quart per hour so I think the majority of my engine
> break-in is done. I have sealed all the significant holes in the
> upper cowl pressure area and are now considering adding the lower cowl
> louvers to try to get more CHT cooling. Any thoughts from you guys
> who have been down this road.
> Thanks,
> Chuck Schieffer
>
> *
>
>
> *
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