Today's Message Index:
----------------------
1. 09:01 AM - Oil Cooler (Albert Gardner)
2. 03:13 PM - fuel boost pump (lbgjb10)
3. 03:38 PM - Re: fuel boost pump (Tim Olson)
4. 05:28 PM - Re: fuel boost pump (Dave Saylor)
5. 05:39 PM - Re: fuel boost pump (lbgjb10)
6. 05:46 PM - Re: fuel boost pump (Jesse Saint)
7. 06:29 PM - Re: fuel boost pump (Don McDonald)
8. 09:17 PM - Re: Oil Cooler (raddatz)
Message 1
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I finished the installation of the 2nd oil cooler and it seems to have
solved my cooling problem. I installed it on the right firewall in the same
way the original was installed on the left.
Albert Gardner
Yuma, AZ
PS: The recent 30 to 40 degree drop in OAT's probably helped also.
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Most high performance planes I've flown, I would use the boost pump on takeoff
and landing, and possible thru the climb. Any concensus on the IO540? A couple
times when it has been hot on long times my fuel pressure has started to drop
a little and the fuel boost pump fixes the problem. larry
--------
Larry and Gayle N104LG
Read this topic online here:
http://forums.matronics.com/viewtopic.php?p=217677#217677
Message 3
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| Subject: | Re: fuel boost pump |
Larry,
If you have a regular IO-540, then the RV-10 isn't one of those
planes that you have to be careful of running the boost pump on.
So it's really a good idea to use it on takeoff. I don't
ever remember to turn it off, so I got in the habit of not
using it. It works ok, but, for the first few seconds after
going full power, the pressure sometimes drops a bit, enough
to trip my 16 psi alarm level. I have my pump switch right
next to my throttle, so I just flick my thumb and it's on.
What would be better of me, is to just remember all the time. :)
I'd say on maybe 1 of 10 takeoffs I'd get a warning if I didn't
use the boost pump, and I've waited it out many times,
just to see how low it would go, and it didn't get too
awful. But I still think it's a good idea to climb that first
500' with the pump on. Beyond that, once you're more able
to think for 5 seconds and glide if there was a problem, you
may as well just turn it off.
Then, on extended climbs, if you let the airspeed get low,
I've noticed that the pressure may start to waver and decrease.
It also trips the alarm. I'm not sure why this happens...we've
talked about it before, but my best guess is that it's heating.
Heating of the fuel because of less airflow through the cowl.
Dropping the nose to 120kts or more helps. And I only have
the problem when climbing at full WOT. As soon as I level off,
and lean, it's fine. It happens maybe 6-7000' into a climb.
I usually turn it on for 10 seconds whenever I get that happening
in a climb. Usually then I can turn it off, after I drop the
nose a little, and it's ok from there on.
For landing, just like for taking off, it's best practice to
use it. Although, for landing, you won't have any problem
with pressure at all, unless you have a pump go bad.
Tim Olson - RV-10 N104CD - Flying
do not archive
lbgjb10 wrote:
>
> Most high performance planes I've flown, I would use the boost pump
> on takeoff and landing, and possible thru the climb. Any concensus
> on the IO540? A couple times when it has been hot on long times my
> fuel pressure has started to drop a little and the fuel boost pump
> fixes the problem. larry
>
> -------- Larry and Gayle N104LG
>
>
>
>
> Read this topic online here:
>
> http://forums.matronics.com/viewtopic.php?p=217677#217677
>
>
>
Message 4
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My understanding is that the boost pump should be on any time that a failure
of the engine-driven pump would cause a critical situation, i.e., take-off
and landing or other low-altitude operations. Unlike most high-wing
carbureted airplanes, ours won't run without a fuel pump; therefore we have
redundant fuel pressure sources. There's nothing to draw fuel into the
engine like head pressure or a carb venturi. Plus, the fuel servo needs a
certain minimum inlet fuel pressure to meter correctly. The book says 14
psi; it might tolerate something less, but it won't draw fuel in like a
carb.
At altitude, you would probably have time to turn on the boost pump as part
of the emergency procedures should the engine quit. On take-off, landing,
or during a go-around (add you own scenario here), you don't need the boost
pump added to your to-do list, so turn it on before you get too busy.
I don't think you can hurt anything by leaving it on, but I guess you would
be using up pump life. However, on my installation with the fuel flow
transducer in the stock location just downstream from the boost pump,
turning on the pump adds about 4 GPH to the fuel flow indication. I know it
isn't affecting the actual fuel flow but for some reason the transducer
doesn't like the pump. We saw the same thing in another -10. The owner had
us switch the transducer to downstream of the servo, and it now works
perfectly all the time.
Dave Saylor
AirCrafters LLC
140 Aviation Way
Watsonville, CA
831-722-9141
831-750-0284 CL
www.AirCraftersLLC.com
-----Original Message-----
From: owner-rv10-list-server@matronics.com
[mailto:owner-rv10-list-server@matronics.com] On Behalf Of Tim Olson
Sent: Thursday, December 04, 2008 3:38 PM
Subject: Re: RV10-List: fuel boost pump
Larry,
If you have a regular IO-540, then the RV-10 isn't one of those planes that
you have to be careful of running the boost pump on.
So it's really a good idea to use it on takeoff. I don't
ever remember to turn it off, so I got in the habit of not using it. It
works ok, but, for the first few seconds after going full power, the
pressure sometimes drops a bit, enough to trip my 16 psi alarm level. I
have my pump switch right next to my throttle, so I just flick my thumb and
it's on.
What would be better of me, is to just remember all the time. :) I'd say on
maybe 1 of 10 takeoffs I'd get a warning if I didn't use the boost pump, and
I've waited it out many times, just to see how low it would go, and it
didn't get too awful. But I still think it's a good idea to climb that first
500' with the pump on. Beyond that, once you're more able to think for 5
seconds and glide if there was a problem, you may as well just turn it off.
Then, on extended climbs, if you let the airspeed get low, I've noticed that
the pressure may start to waver and decrease.
It also trips the alarm. I'm not sure why this happens...we've talked about
it before, but my best guess is that it's heating.
Heating of the fuel because of less airflow through the cowl.
Dropping the nose to 120kts or more helps. And I only have the problem when
climbing at full WOT. As soon as I level off, and lean, it's fine. It
happens maybe 6-7000' into a climb.
I usually turn it on for 10 seconds whenever I get that happening in a
climb. Usually then I can turn it off, after I drop the nose a little, and
it's ok from there on.
For landing, just like for taking off, it's best practice to use it.
Although, for landing, you won't have any problem with pressure at all,
unless you have a pump go bad.
Tim Olson - RV-10 N104CD - Flying
do not archive
lbgjb10 wrote:
>
> Most high performance planes I've flown, I would use the boost pump on
> takeoff and landing, and possible thru the climb. Any concensus on
> the IO540? A couple times when it has been hot on long times my fuel
> pressure has started to drop a little and the fuel boost pump fixes
> the problem. larry
>
> -------- Larry and Gayle N104LG
>
>
>
>
> Read this topic online here:
>
> http://forums.matronics.com/viewtopic.php?p=217677#217677
>
>
>
Message 5
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| Subject: | Re: fuel boost pump |
great answers, thanks. larry
--------
Larry and Gayle N104LG
Read this topic online here:
http://forums.matronics.com/viewtopic.php?p=217692#217692
Message 6
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| Subject: | Re: fuel boost pump |
This would sum up my recommendations exactly. The increased fuel flow
reading caused by the pulses in the pump (I am told) actually can act
as a reminder to turn it off in cruise.
Jesse Saint
Saint Aviation
jesse@saintaviation.com
352-427-0285
Sent from my iPhone
On Dec 4, 2008, at 8:27 PM, "Dave Saylor" <Dave@AirCraftersLLC.com>
wrote:
> >
>
> My understanding is that the boost pump should be on any time that a
> failure
> of the engine-driven pump would cause a critical situation, i.e.,
> take-off
> and landing or other low-altitude operations. Unlike most high-wing
> carbureted airplanes, ours won't run without a fuel pump; therefore
> we have
> redundant fuel pressure sources. There's nothing to draw fuel into
> the
> engine like head pressure or a carb venturi. Plus, the fuel servo
> needs a
> certain minimum inlet fuel pressure to meter correctly. The book
> says 14
> psi; it might tolerate something less, but it won't draw fuel in
> like a
> carb.
>
> At altitude, you would probably have time to turn on the boost pump
> as part
> of the emergency procedures should the engine quit. On take-off,
> landing,
> or during a go-around (add you own scenario here), you don't need
> the boost
> pump added to your to-do list, so turn it on before you get too busy.
>
> I don't think you can hurt anything by leaving it on, but I guess
> you would
> be using up pump life. However, on my installation with the fuel flow
> transducer in the stock location just downstream from the boost pump,
> turning on the pump adds about 4 GPH to the fuel flow indication. I
> know it
> isn't affecting the actual fuel flow but for some reason the
> transducer
> doesn't like the pump. We saw the same thing in another -10. The
> owner had
> us switch the transducer to downstream of the servo, and it now works
> perfectly all the time.
>
> Dave Saylor
> AirCrafters LLC
> 140 Aviation Way
> Watsonville, CA
> 831-722-9141
> 831-750-0284 CL
> www.AirCraftersLLC.com
>
>
> -----Original Message-----
> From: owner-rv10-list-server@matronics.com
> [mailto:owner-rv10-list-server@matronics.com] On Behalf Of Tim Olson
> Sent: Thursday, December 04, 2008 3:38 PM
> To: rv10-list@matronics.com
> Subject: Re: RV10-List: fuel boost pump
>
>
> Larry,
>
> If you have a regular IO-540, then the RV-10 isn't one of those
> planes that
> you have to be careful of running the boost pump on.
> So it's really a good idea to use it on takeoff. I don't
> ever remember to turn it off, so I got in the habit of not using
> it. It
> works ok, but, for the first few seconds after going full power, the
> pressure sometimes drops a bit, enough to trip my 16 psi alarm
> level. I
> have my pump switch right next to my throttle, so I just flick my
> thumb and
> it's on.
> What would be better of me, is to just remember all the time. :) I'd
> say on
> maybe 1 of 10 takeoffs I'd get a warning if I didn't use the boost
> pump, and
> I've waited it out many times, just to see how low it would go, and it
> didn't get too awful. But I still think it's a good idea to climb
> that first
> 500' with the pump on. Beyond that, once you're more able to think
> for 5
> seconds and glide if there was a problem, you may as well just turn
> it off.
>
> Then, on extended climbs, if you let the airspeed get low, I've
> noticed that
> the pressure may start to waver and decrease.
> It also trips the alarm. I'm not sure why this happens...we've
> talked about
> it before, but my best guess is that it's heating.
> Heating of the fuel because of less airflow through the cowl.
> Dropping the nose to 120kts or more helps. And I only have the
> problem when
> climbing at full WOT. As soon as I level off, and lean, it's fine.
> It
> happens maybe 6-7000' into a climb.
> I usually turn it on for 10 seconds whenever I get that happening in a
> climb. Usually then I can turn it off, after I drop the nose a
> little, and
> it's ok from there on.
>
> For landing, just like for taking off, it's best practice to use it.
> Although, for landing, you won't have any problem with pressure at
> all,
> unless you have a pump go bad.
>
> Tim Olson - RV-10 N104CD - Flying
> do not archive
>
>
> lbgjb10 wrote:
>>
>> Most high performance planes I've flown, I would use the boost pump
>> on
>> takeoff and landing, and possible thru the climb. Any concensus on
>> the IO540? A couple times when it has been hot on long times my fuel
>> pressure has started to drop a little and the fuel boost pump fixes
>> the problem. larry
>>
>> -------- Larry and Gayle N104LG
>>
>>
>>
>>
>> Read this topic online here:
>>
>> http://forums.matronics.com/viewtopic.php?p=217677#217677
>>
>>
>>
>
>
Message 7
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| Subject: | Re: fuel boost pump |
Best reminder for me is a light.- Turn the pump on, a blue light goes on.
- Hopefully that will trigger the appropriate response.
Don
--- On Thu, 12/4/08, Jesse Saint <jesse@saintaviation.com> wrote:
From: Jesse Saint <jesse@saintaviation.com>
Subject: Re: RV10-List: fuel boost pump
This would sum up my recommendations exactly. The increased fuel flow read
ing
caused by the pulses in the pump (I am told) actually can act as a reminder
to
turn it off in cruise.
Jesse Saint
Saint Aviation
jesse@saintaviation.com
352-427-0285
Sent from my iPhone
On Dec 4, 2008, at 8:27 PM, "Dave Saylor"
<Dave@AirCraftersLLC.com> wrote:
<Dave@aircraftersllc.com>
>
> My understanding is that the boost pump should be on any time that a
failure
> of the engine-driven pump would cause a critical situation, i.e., take-of
f
> and landing or other low-altitude operations. Unlike most high-wing
> carbureted airplanes, ours won't run without a fuel pump; therefore
we have
> redundant fuel pressure sources. There's nothing to draw fuel into
the
> engine like head pressure or a carb venturi. Plus, the fuel servo needs
a
> certain minimum inlet fuel pressure to meter correctly. The book says 14
> psi; it might tolerate something less, but it won't draw fuel in like
a
> carb.
>
> At altitude, you would probably have time to turn on the boost pump as
part
> of the emergency procedures should the engine quit. On take-off, landing
,
> or during a go-around (add you own scenario here), you don't need the
boost
> pump added to your to-do list, so turn it on before you get too busy.
>
> I don't think you can hurt anything by leaving it on, but I guess you
would
> be using up pump life. However, on my installation with the fuel flow
> transducer in the stock location just downstream from the boost pump,
> turning on the pump adds about 4 GPH to the fuel flow indication. I know
it
> isn't affecting the actual fuel flow but for some reason the
transducer
> doesn't like the pump. We saw the same thing in another -10. The
owner had
> us switch the transducer to downstream of the servo, and it now works
> perfectly all the time.
>
> Dave Saylor
> AirCrafters LLC
> 140 Aviation Way
> Watsonville, CA
> 831-722-9141
> 831-750-0284 CL
> www.AirCraftersLLC.com
>
>
> -----Original Message-----
> From: owner-rv10-list-server@matronics.com
> [mailto:owner-rv10-list-server@matronics.com] On Behalf Of Tim Olson
> Sent: Thursday, December 04, 2008 3:38 PM
> To: rv10-list@matronics.com
> Subject: Re: RV10-List: fuel boost pump
>
>
> Larry,
>
> If you have a regular IO-540, then the RV-10 isn't one of those planes
that
> you have to be careful of running the boost pump on.
> So it's really a good idea to use it on takeoff. I don't
> ever remember to turn it off, so I got in the habit of not using it. It
> works ok, but, for the first few seconds after going full power, the
> pressure sometimes drops a bit, enough to trip my 16 psi alarm level. I
> have my pump switch right next to my throttle, so I just flick my thumb
and
> it's on.
> What would be better of me, is to just remember all the time. :) I'd
say on
> maybe 1 of 10 takeoffs I'd get a warning if I didn't use the boost
pump, and
> I've waited it out many times, just to see how low it would go, and it
> didn't get too awful. But I still think it's a good idea to climb
that first
> 500' with the pump on. Beyond that, once you're more able to
think for 5
> seconds and glide if there was a problem, you may as well just turn it
off.
>
> Then, on extended climbs, if you let the airspeed get low, I've
noticed that
> the pressure may start to waver and decrease.
> It also trips the alarm. I'm not sure why this happens...we've
talked about
> it before, but my best guess is that it's heating.
> Heating of the fuel because of less airflow through the cowl.
> Dropping the nose to 120kts or more helps. And I only have the problem
when
> climbing at full WOT. As soon as I level off, and lean, it's fine.
It
> happens maybe 6-7000' into a climb.
> I usually turn it on for 10 seconds whenever I get that happening in a
> climb. Usually then I can turn it off, after I drop the nose a little,
and
> it's ok from there on.
>
> For landing, just like for taking off, it's best practice to use it.
> Although, for landing, you won't have any problem with pressure at
all,
> unless you have a pump go bad.
>
> Tim Olson - RV-10 N104CD - Flying
> do not archive
>
>
> lbgjb10 wrote:
<lbgjb@gnt.net>
>>
>> Most high performance planes I've flown, I would use the boost
pump on
>> takeoff and landing, and possible thru the climb. Any concensus on
>> the IO540? A couple times when it has been hot on long times my fuel
>> pressure has started to drop a little and the fuel boost pump fixes
>> the problem. larry
>>
>> -------- Larry and Gayle N104LG
>>
>>
>>
>>
>> Read this topic online here:
>>
>> http://forums.matronics.com/viewtopic.php?p=217677#217677
>>
>>
>>
>
>
>
>
>
>
>
>
>
=0A=0A=0A
Message 8
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Albert,
Did that change the cylinder head temps at all?
Read this topic online here:
http://forums.matronics.com/viewtopic.php?p=217720#217720
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