Today's Message Index:
----------------------
1. 12:29 PM - What kind of max RPMs are you getting from your IO540 (Bill Watson)
2. 01:00 PM - Re: What kind of max RPMs are you getting from your IO540 (John Cumins)
3. 01:01 PM - Re: What kind of max RPMs are you getting from your IO540 (Jim Combs)
4. 01:07 PM - Panel Audio/Data Diagrams (RV Builder (Michael Sausen))
5. 01:15 PM - Re: What kind of max RPMs are you getting from your IO540 (Bill Watson)
6. 01:16 PM - Re: What kind of max RPMs are you getting from your IO540 (Bill Watson)
7. 01:27 PM - Re: What kind of max RPMs are you getting from your IO540 (Michael Kraus)
8. 01:38 PM - Re: What kind of max RPMs are you getting from your IO540 (Linn Walters)
9. 01:46 PM - Re: What kind of max RPMs are you getting from your IO540 (Rob Kochman)
10. 02:12 PM - Re: What kind of max RPMs are you getting from your IO540 (Dave Saylor)
11. 02:31 PM - Re: What kind of max RPMs are you getting from your IO540 (Kelly McMullen)
12. 03:01 PM - Re: Panel Audio/Data Diagrams (dmaib@me.com)
13. 05:35 PM - Re: What kind of max RPMs are you getting from your IO540 (Bob Turner)
14. 05:39 PM - Re: What kind of max RPMs are you getting from your IO540 (Bob Turner)
15. 05:56 PM - Re: Panel Audio/Data Diagrams (Bob Turner)
16. 06:01 PM - Re: Panel Audio/Data Diagrams (Bob Turner)
17. 06:23 PM - Re: Re: What kind of max RPMs are you getting from your IO540 (Bill Watson)
18. 06:44 PM - Re: Re: Panel Audio/Data Diagrams (Linn Walters)
19. 07:18 PM - Re: Re: What kind of max RPMs are you getting from your IO540 (Kelly McMullen)
20. 11:40 PM - Re: Panel Audio/Data Diagrams (Bob Turner)
Message 1
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| Subject: | What kind of max RPMs are you getting from your IO540 |
I'm still under 40 hours on my IO540-D4A5. On takeoff (from 350' MSL)
I'm getting a momentary max RPM of 2690 at that point in the ground run
when the engine speed up to it's max. Then it settles down to 2540 for
lift-off and initial climb. (figures from GRT logs)
I understand the max rated power is achieved at 2700 rpms. I'm thinking
that's consistent with what I'm seeing. Is it? Are seeing similar numbers?
Thanks.
Bill "flying a little and tinkering a lot" Watson
Message 2
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| Subject: | What kind of max RPMs are you getting from your IO540 |
Bill
Sounds like the governor max stop is a bit off. You should be able to get
2700 in flight at full power.
John Cumins
President
707-425-7100
707-425-7576 Fax
-----Original Message-----
From: owner-rv10-list-server@matronics.com
[mailto:owner-rv10-list-server@matronics.com] On Behalf Of Bill Watson
Sent: Friday, October 07, 2011 12:25 PM
Subject: RV10-List: What kind of max RPMs are you getting from your IO540
I'm still under 40 hours on my IO540-D4A5. On takeoff (from 350' MSL) I'm
getting a momentary max RPM of 2690 at that point in the ground run when the
engine speed up to it's max. Then it settles down to 2540 for lift-off and
initial climb. (figures from GRT logs)
I understand the max rated power is achieved at 2700 rpms. I'm thinking
that's consistent with what I'm seeing. Is it? Are seeing similar numbers?
Thanks.
Bill "flying a little and tinkering a lot" Watson
Message 3
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| Subject: | Re: What kind of max RPMs are you getting from your IO540 |
Are you jumping on the throttle fast enough to have the engine overrun the
governor. Especially if the oil is cool?
Sounds like it from your description and making the assumption (I know what
that leads to!) that you have the prop full in for the initial takeoff and
climb?
Jim Combs
do not archive
On Fri, Oct 7, 2011 at 3:24 PM, Bill Watson <Mauledriver@nc.rr.com> wrote:
>
> I'm still under 40 hours on my IO540-D4A5. On takeoff (from 350' MSL) I'm
> getting a momentary max RPM of 2690 at that point in the ground run when the
> engine speed up to it's max. Then it settles down to 2540 for lift-off and
> initial climb. (figures from GRT logs)
>
> I understand the max rated power is achieved at 2700 rpms. I'm thinking
> that's consistent with what I'm seeing. Is it? Are seeing similar numbers?
>
> Thanks.
>
> Bill "flying a little and tinkering a lot" Watson
>
>
Message 4
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| Subject: | Panel Audio/Data Diagrams |
Being a big fan of peer reviewed eye charts I thought I would throw my data
/audio diagrams for my panel out to the group and see if anyone had any com
ments or thoughts on it. The first page just shows who is talking to who,
the following pages are just a device view, and then there are two block d
iagrams near the end that show the connections between all the devices.
Michael
Message 5
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| Subject: | Re: What kind of max RPMs are you getting from your IO540 |
That's probably true. I do have it full forward for takeoff and
intial climb.
Previous to this, my only CS prop time was about 10 hours in a Mooney so
this is new territory.
Bill
On 10/7/2011 3:59 PM, Jim Combs wrote:
> Are you jumping on the throttle fast enough to have the engine overrun
> the governor. Especially if the oil is cool?
>
> Sounds like it from your description and making the assumption (I know
> what that leads to!) that you have the prop full in for the initial
> takeoff and climb?
>
> Jim Combs
> do not archive
>
> On Fri, Oct 7, 2011 at 3:24 PM, Bill Watson <Mauledriver@nc.rr.com
> <mailto:Mauledriver@nc.rr.com>> wrote:
>
> <Mauledriver@nc.rr.com <mailto:Mauledriver@nc.rr.com>>
>
> I'm still under 40 hours on my IO540-D4A5. On takeoff (from 350'
> MSL) I'm getting a momentary max RPM of 2690 at that point in the
> ground run when the engine speed up to it's max. Then it settles
> down to 2540 for lift-off and initial climb. (figures from GRT logs)
>
> I understand the max rated power is achieved at 2700 rpms. I'm
> thinking that's consistent with what I'm seeing. Is it? Are
> seeing similar numbers?
>
> Thanks.
>
> Bill "flying a little and tinkering a lot" Watson
>
>
> ===================================
> arget="_blank">http://www.matronics.com/Navigator?RV10-List
> ===================================
> http://forums.matronics.com
> ===================================
> le, List Admin.
> ="_blank">http://www.matronics.com/contribution
> ===================================
>
>
> *
>
>
> *
Message 6
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| Subject: | Re: What kind of max RPMs are you getting from your IO540 |
That may well be the case. Seems like it should be easy to remedy.
Will have to hit the manuals. Any advice welcome here.
Bill
On 10/7/2011 3:51 PM, John Cumins wrote:
> --> RV10-List message posted by: "John Cumins"<jcumins@jcis.net>
>
> Bill
>
> Sounds like the governor max stop is a bit off. You should be able to get
> 2700 in flight at full power.
>
>
> John Cumins
> President
> 707-425-7100
> 707-425-7576 Fax
>
>
> -----Original Message-----
> From: owner-rv10-list-server@matronics.com
> [mailto:owner-rv10-list-server@matronics.com] On Behalf Of Bill Watson
> Sent: Friday, October 07, 2011 12:25 PM
> To: rv10-list@matronics.com
> Subject: RV10-List: What kind of max RPMs are you getting from your IO540
>
> --> RV10-List message posted by: Bill Watson<Mauledriver@nc.rr.com>
>
> I'm still under 40 hours on my IO540-D4A5. On takeoff (from 350' MSL) I'm
> getting a momentary max RPM of 2690 at that point in the ground run when the
> engine speed up to it's max. Then it settles down to 2540 for lift-off and
> initial climb. (figures from GRT logs)
>
> I understand the max rated power is achieved at 2700 rpms. I'm thinking
> that's consistent with what I'm seeing. Is it? Are seeing similar numbers?
>
> Thanks.
>
> Bill "flying a little and tinkering a lot" Watson
>
>
Message 7
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| Subject: | Re: What kind of max RPMs are you getting from your IO540 |
I get 2700 rpm on takeoff and through climb until I dial it back.... Sounds like
your governor needs a small adjustment. Easy to do, but trial and error to
set it right. It should be in the manual.
-Mike
Sent from my iPhone
On Oct 7, 2011, at 3:24 PM, Bill Watson <Mauledriver@nc.rr.com> wrote:
>
> I'm still under 40 hours on my IO540-D4A5. On takeoff (from 350' MSL) I'm getting
a momentary max RPM of 2690 at that point in the ground run when the engine
speed up to it's max. Then it settles down to 2540 for lift-off and initial
climb. (figures from GRT logs)
>
> I understand the max rated power is achieved at 2700 rpms. I'm thinking that's
consistent with what I'm seeing. Is it? Are seeing similar numbers?
>
> Thanks.
>
> Bill "flying a little and tinkering a lot" Watson
>
>
>
>
>
Message 8
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| Subject: | Re: What kind of max RPMs are you getting from your IO540 |
On 10/7/2011 3:24 PM, Bill Watson wrote:
>
> I'm still under 40 hours on my IO540-D4A5. On takeoff (from 350' MSL)
> I'm getting a momentary max RPM of 2690 at that point in the ground
> run when the engine speed up to it's max. Then it settles down to
> 2540 for lift-off and initial climb. (figures from GRT logs)
I think that's strange too. The faster the airplane goes the higher the
RPM .... to a point. Did you get the numbers backwards?
>
> I understand the max rated power is achieved at 2700 rpms.
I looked in my manual. The HP depends on how much fuel you can feed it.
(CR = 8.5:1, 25 BTDC timing)
At best power the engine produces
75% power @ 2700 RPM @ 17+ GPH
85% power @ 2700 RPM @ 19- GPH
and the graph continues up to 260HP @ 21.5 GPH!
All at 2700 RPM.
Now, upgrade to the IO-540-K (8.7:1 CR and 20 deg BTDC timing) and you get
75% power @ 2700 RPM @ 19 GPH
85% power @ 2700 RPM @ 21 GPH
and the graph continues up to 300HP @ 24 GPH!
All at 2700 RPM.
I guess it all depends on the mission.
> I'm thinking that's consistent with what I'm seeing. Is it? Are
> seeing similar numbers?
I wish I could answer that. I'm still building, and making some progress!!!
Linn
> Thanks.
>
> Bill "flying a little and tinkering a lot" Watson
>
>
Message 9
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| Subject: | Re: What kind of max RPMs are you getting from your IO540 |
If you use the MT governor from Vans and the standard engine IO-540-D4A5 you
will have the low RPM problem. See the governor manual, but I believe a
complete turn of the high RPM stop screw yields a RPM increase of 50.
Quick, simple adjustment.
With that set properly, you may see RPM above 2700 if you advance the
throttle quickly for takeoff. That requires a propeller adjustment (see
your prop manual).
-Rob
On Fri, Oct 7, 2011 at 1:13 PM, Bill Watson <Mauledriver@nc.rr.com> wrote:
>
> That may well be the case. Seems like it should be easy to remedy. Will
> have to hit the manuals. Any advice welcome here.
>
> Bill
>
>
> On 10/7/2011 3:51 PM, John Cumins wrote:
>
>> --> RV10-List message posted by: "John Cumins"<jcumins@jcis.net>
>>
>> Bill
>>
>> Sounds like the governor max stop is a bit off. You should be able to get
>> 2700 in flight at full power.
>>
>>
>> John Cumins
>> President
>> 707-425-7100
>> 707-425-7576 Fax
>>
>>
>>
>> -----Original Message-----
>> From: owner-rv10-list-server@**matronics.com<owner-rv10-list-server@matronics.com>
>> [mailto:owner-rv10-list-**server@matronics.com<owner-rv10-list-server@matronics.com>]
>> On Behalf Of Bill Watson
>> Sent: Friday, October 07, 2011 12:25 PM
>> To: rv10-list@matronics.com
>> Subject: RV10-List: What kind of max RPMs are you getting from your IO540
>>
>> --> RV10-List message posted by: Bill Watson<Mauledriver@nc.rr.com>
>>
>> I'm still under 40 hours on my IO540-D4A5. On takeoff (from 350' MSL) I'm
>> getting a momentary max RPM of 2690 at that point in the ground run when
>> the
>> engine speed up to it's max. Then it settles down to 2540 for lift-off
>> and
>> initial climb. (figures from GRT logs)
>>
>> I understand the max rated power is achieved at 2700 rpms. I'm thinking
>> that's consistent with what I'm seeing. Is it? Are seeing similar
>> numbers?
>>
>> Thanks.
>>
>> Bill "flying a little and tinkering a lot" Watson
>>
>>
>>
>>
>>
>>
>>
>>
>>
>>
>>
>>
>>
>
>
--
Rob Kochman
RV-10 Flying since March 2011
Woodinville, WA
http://kochman.net/N819K
Message 10
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| Subject: | Re: What kind of max RPMs are you getting from your IO540 |
I like to see a tiny bit over 2700, like 10 or 20 rpm. You should be able to get
that right from the start. Power increases about proportionally with rpm so
running 100 low loses you several horses.
Wish I could see MP at ambient...
--Dave
On Oct 7, 2011, at 15:24, Bill Watson <Mauledriver@nc.rr.com> wrote:
>
> I'm still under 40 hours on my IO540-D4A5. On takeoff (from 350' MSL) I'm getting
a momentary max RPM of 2690 at that point in the ground run when the engine
speed up to it's max. Then it settles down to 2540 for lift-off and initial
climb. (figures from GRT logs)
>
> I understand the max rated power is achieved at 2700 rpms. I'm thinking that's
consistent with what I'm seeing. Is it? Are seeing similar numbers?
>
> Thanks.
>
> Bill "flying a little and tinkering a lot" Watson
>
>
>
>
>
>
Message 11
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| Subject: | Re: What kind of max RPMs are you getting from your IO540 |
Those fuel flows sound low for full power. I would expect 22-23 gph,
because a 200 hp Lycoming needs ~17gph on takeoff to have EGT where you
want it, roughly 200 ROP, or about 1250F. 300 hp engine should need
around 26-27. I know an IO550 Continental with 310 hp needs 29-30 gph
for takeoff.
On 10/7/2011 1:34 PM, Linn Walters wrote:
> -I looked in my manual. The HP depends on how much fuel you can feed it.
> (CR = 8.5:1, 25 BTDC timing)
> At best power the engine produces
> 75% power @ 2700 RPM @ 17+ GPH
> 85% power @ 2700 RPM @ 19- GPH
> and the graph continues up to 260HP @ 21.5 GPH!
> All at 2700 RPM.
>
> Now, upgrade to the IO-540-K (8.7:1 CR and 20 deg BTDC timing) and you
> get
> 75% power @ 2700 RPM @ 19 GPH
> 85% power @ 2700 RPM @ 21 GPH
> and the graph continues up to 300HP @ 24 GPH!
> All at 2700 RPM.
>
> I guess it all depends on the mission.
>> I'm thinking that's consistent with what I'm seeing. Is it? Are
>> seeing similar numbers?
> I wish I could answer that. I'm still building, and making some
> progress!!!
> Linn
>
>> Thanks.
>>
>> Bill "flying a little and tinkering a lot" Watson
>>
>>
>>
>>
>>
>>
>
>
Message 12
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| Subject: | Re: Panel Audio/Data Diagrams |
Looks like a great setup. You are going to love your VP-200. My Infinity grip is
similar to yours, except I have rudder trim instead of flaps. My flap switch
is on the panel. If I had it to do over again, I would make the pinky finger
switch on the bottom of the grip, a starter button. VP protects you from accidentally
engaging the starter when you don't want to. I just find it would be nice
to be able to hold the stick with my left hand and throttle with the right
while starting. As it is, I hold the stick between my knees, hit the starter
button with my left hand and use the right hand for the throttle. Not a big enough
deal for me to go back and change it now, but one of those things I would
change on the build, knowing what I know now. I use the rudder trim so infrequently,
that it could easily reside on the panel. In fact, I might not even put
rudder trim in if I was doing it again. I have my ACK button where you have
your flap control. I find that I use that button a lot, since it is also the button
that advances you through the VP checklists. All personal preference, but
my $.02 worth. Again, you are going to have a 1st class setup there.
--------
David Maib
RV-10 #40559
Read this topic online here:
http://forums.matronics.com/viewtopic.php?p=354329#354329
Message 13
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| Subject: | Re: What kind of max RPMs are you getting from your IO540 |
My YIO-540-D4A5 data plate says it's certified for 260 HP at 2700 RPM, or 250 HP
at 2600 RPM.
My guess is the effective (power to the airplane) power loss with lower RPM is
smaller than that 10 HP, since the prop is less efficient at the higher RPM's.
I have the Hartzell governor, and it came pre-adjusted to 2650 RPM. I haven't bothered
to tweak it upwards yet, and I'm wondering if I ever will. I like the
idea of keeping the noise down a bit, and I certainly don't need the power from
my home airport (400' MSL). Of course, if I'm at Leadville on a hot day and
heavy, I may wish I had every HP available.
--------
Bob Turner
RV-10 QB
Read this topic online here:
http://forums.matronics.com/viewtopic.php?p=354352#354352
Message 14
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| Subject: | Re: What kind of max RPMs are you getting from your IO540 |
PS to Bill:
You shouldn't be seeing a 150 RPM overrun of the governor, if you're taking at
least a full second or more to push the throttle in. Either the oil hasn't warmed
up, or the oil passage is clogged a bit, or something else. You do test the
prop once or twice during run up, to get warm oil up there, right?
--------
Bob Turner
RV-10 QB
Read this topic online here:
http://forums.matronics.com/viewtopic.php?p=354354#354354
Message 15
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| Subject: | Re: Panel Audio/Data Diagrams |
Since you asked....
I have a Trio autopilot, so I'm not sure about yours, but mine puts out a warning
tone on disconnect so you need an un-switched input on your audio panel for
that.
The Dynon D-10 will put out a warning tone associated with the AOA (if you have
the supporting pitot tube and plumbing) so you need an un-switched audio input
for that.
Your SL-30 shows one audio line out. That will work (the SL-30 can combine com
and nav audio internally) but many people like separate lines, so you can select
them on the audio panel. Or use another un-switched input for the nav line
and select it on the SL-30 itself (that's what I do).
I can't see what kind of Garmin GPS you have (not familiar with the new ones) but
if it has a com and a VOR you'll need 2 lines to the audio panel for them.
Does your AFS EFIS put out any warning tones? Maybe for AOA? If so, another line
to another un-switched input on the audio panel.
It's amazing how many wires go into these audio panels (no wonder labor costs are
high on them), especially if you have a four place stereo intercom. (I didn't
see the intercom wires on your diagram, either. But each person gets 5 wires
plus shields.)
--------
Bob Turner
RV-10 QB
Read this topic online here:
http://forums.matronics.com/viewtopic.php?p=354357#354357
Message 16
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| Subject: | Re: Panel Audio/Data Diagrams |
What is the oxygen control (?) instrument pictured? I don't think I've ever seen
that before.
--------
Bob Turner
RV-10 QB
Read this topic online here:
http://forums.matronics.com/viewtopic.php?p=354358#354358
Message 17
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| Subject: | Re: What kind of max RPMs are you getting from your IO540 |
I do test, just once, and very briefly. It's the way I was taught. I'm
taking more than a second to push the throttle.
I'll be paying a lot more attention to these things the next couple of
takeoffs - we'll see.
On 10/7/2011 8:36 PM, Bob Turner wrote:
> --> RV10-List message posted by: "Bob Turner"<bobturner@alum.rpi.edu>
>
> PS to Bill:
>
> You shouldn't be seeing a 150 RPM overrun of the governor, if you're taking at
least a full second or more to push the throttle in. Either the oil hasn't warmed
up, or the oil passage is clogged a bit, or something else. You do test
the prop once or twice during run up, to get warm oil up there, right?
>
> --------
> Bob Turner
> RV-10 QB
>
>
> Read this topic online here:
>
> http://forums.matronics.com/viewtopic.php?p=354354#354354
>
>
Message 18
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| Subject: | Re: Panel Audio/Data Diagrams |
On 10/7/2011 8:54 PM, Bob Turner wrote:
> --> RV10-List message posted by: "Bob Turner"<bobturner@alum.rpi.edu>
snip!
Most of the extraneous audio inputs can be capacitive coupled to a
single unswitched input.
>
> It's amazing how many wires go into these audio panels (no wonder labor costs
are high on them), especially if you have a four place stereo intercom. (I didn't
see the intercom wires on your diagram, either. But each person gets 5 wires
plus shields.)
5?? Lessee Audio L & R, Mic and Mic Key. My fingers say 4. So that's
probably a typo??? :-P
And being the mean thing I am I didn't give the back seaters a mic key!!!!
Linn
>
> --------
> Bob Turner
> RV-10 QB
>
>
> Read this topic online here:
>
> http://forums.matronics.com/viewtopic.php?p=354357#354357
>
>
Message 19
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| Subject: | Re: What kind of max RPMs are you getting from your IO540 |
Given the acceleration of the -10, on all but a sub-1000ft strip, I
would ease the throttle in slowly enough that you are at rotation
speed when you got full throttle(i.e. more than 5 sec). I don't like
to shock the plugs or cylinders with rapid throttle increases, and
learned years ago that very slow throttle addition prevented rock
dings in the prop when operating off gravel strips.
On Fri, Oct 7, 2011 at 6:20 PM, Bill Watson <Mauledriver@nc.rr.com> wrote:
>
> I do test, just once, and very briefly. It's the way I was taught. I'm
> taking more than a second to push the throttle.
>
> I'll be paying a lot more attention to these things the next couple of
> takeoffs - we'll see.
>
>
> On 10/7/2011 8:36 PM, Bob Turner wrote:
>>
>>
>> PS to Bill:
>>
>> You shouldn't be seeing a 150 RPM overrun of the governor, if you're
>> taking at least a full second or more to push the throttle in. Either the
>> oil hasn't warmed up, or the oil passage is clogged a bit, or something
>> else. You do test the prop once or twice during run up, to get warm oil up
>> there, right?
>>
>> --------
>> Bob Turner
>> RV-10 QB
>>
>>
>>
>>
>> Read this topic online here:
>>
>> http://forums.matronics.com/viewtopic.php?p=354354#354354
>>
>>
>>
>>
>>
>>
>>
>>
>>
>>
>>
>>
>
>
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| Subject: | Re: Panel Audio/Data Diagrams |
Tying together various outputs is okay as long as they all have a high impedance
looking "backwards" into the device. Not all do. I've seen the old Cessna audio
panels that just paralleled the inputs. As you selected more radios to "on",
the volumes all dropped lower and lower. Not good.
No, I didn't mis-count the wires to the individual headsets. Good practice is to
not use the airframe ground for the 'return' lines. This helps avoid ground
loops which show up as unwanted noise. So you need a left, right, and common for
the headphone, plus shield (3 wires inside a braided shield). For the mike,
you need a 'hot' (to middle connector) and a 'return', plus shield (2 twisted
wires inside a shield).
Install insulating washers under the jacks to keep the airframe out of the loop
(Stein sells them).
Add one more wire if you want the passenger to have PTT! -:)
--------
Bob Turner
RV-10 QB
Read this topic online here:
http://forums.matronics.com/viewtopic.php?p=354367#354367
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