Today's Message Index:
----------------------
1. 05:05 AM - Re: fuel starvation problem while doing a high angle of attack, power on stall (Carl)
2. 09:17 AM - Re: Zenith750-List Digest: 1 Msgs - 12/06/14 (Bruce Cruikshank)
3. 02:41 PM - Re: Re: Zenith750-List Digest: 1 Msgs - 12/06/14 (j. davis)
Message 1
| INDEX | Back to Main INDEX |
| NEXT | Skip to NEXT Message |
| LIST | Reply to LIST Regarding this Message |
| SENDER | Reply to SENDER Regarding this Message |
|
| Subject: | Re: fuel starvation problem while doing a high angle |
of attack, power on stall
INSTALL A COLLECTOR TANK TO ACT AS A BUFFER FOR WHEN YOUR WING TANKS
UNCOVER (easily done with fuel low) engine keeps running. Best
insurance you ca buy.
Carl
----- Original Message -----
From: j. davis
To: zenith750-list@matronics.com
Sent: Saturday, December 06, 2014 5:02 PM
Subject: Re: Zenith750-List: fuel starvation problem while doing a
high angle of attack, power on stall
What were your pre-first-flight fuel flow numbers at various fuel
levels and angles of attack?
On 5 Dec 2014 10:52, "Jim Kress" <jim.kress@att.net> wrote:
On a training flight yesterday in a Zenith STOL 750 with an 0-200
engine we experienced a short stoppage of the engine while doing a
prolonged high angle of attack, power on stall. We had about half tanks
of fuel on board. Once the engine quit we lowered the nose and
immediately turned on the electric fuel pump. The engine came back to
life and the rest of the flight was uneventful. This phenomenon was not
experienced during the 40 hour flight testing period.
There is a placard advising that the "electric boost pump should be
used for takeoff and landing", however perhaps this should be changed to
say, " electric boost pump should be used during training maneuvers and
low level operations" or something like that.
Jim Kress CFII
_blank">www.aeroelectric.com
.com" target="_blank">www.buildersbooks.com
="_blank">www.homebuilthelp.com
="_blank">www.mypilotstore.com
ank">www.mrrace.com
_blank">http://www.matronics.com/contribution
" target="_blank">http://www.matronics.com/Navigator?Zenith750-List
tp://forums.matronics.com
Message 2
| INDEX | Back to Main INDEX |
| PREVIOUS | Skip to PREVIOUS Message |
| NEXT | Skip to NEXT Message |
| LIST | Reply to LIST Regarding this Message |
| SENDER | Reply to SENDER Regarding this Message |
|
| Subject: | Re: Zenith750-List Digest: 1 Msgs - 12/06/14 |
Jim,
I have a slatless 0-200 powered 750, and use gravity flow, no pumps. I
checked the fuel flow at a 15 degree nose high attitude. The last 3
gallons drained in 11.75 minutes or a rate of 15.3 GPH. I have markings on
the jury struts that are level with the horizon at 15 degrees nose high.
The problem I had was making a nose low descent into a controlled airport
trying to keep up with other traffic. The engine quite. As I was flaring
to land off airport the engine caught. After landing back at the airport I
checked and had 5 gallons of fuel. So I did a test; in a 6 degree nose low
attitude there was 5.2 gallons unusable in the 24 gallon tanks. I added a
0.8 gallon header tank behind the pilots head to fix the problem. Many
certified high wing airplanes have fuel drains at the front and rear of the
tanks.
On Sun, Dec 7, 2014 at 12:01 AM, Zenith750-List Digest Server <
zenith750-list@matronics.com> wrote:
> *
>
> =================================================
> Online Versions of Today's List Digest Archive
> =================================================
>
> Today's complete Zenith750-List Digest can also be found in either of the
> two Web Links listed below. The .html file includes the Digest formatted
> in HTML for viewing with a web browser and features Hyperlinked Indexes
> and Message Navigation. The .txt file includes the plain ASCII version
> of the Zenith750-List Digest and can be viewed with a generic text editor
> such as Notepad or with a web browser.
>
> HTML Version:
>
>
> http://www.matronics.com/digest/digestview.php?Style=82701&View=html&Chapter 14-12-06&Archive=Zenith750
>
> Text Version:
>
>
> http://www.matronics.com/digest/digestview.php?Style=82701&View=txt&Chapter 14-12-06&Archive=Zenith750
>
>
> ===============================================
> EMail Version of Today's List Digest Archive
> ===============================================
>
>
> ----------------------------------------------------------
> Zenith750-List Digest Archive
> ---
> Total Messages Posted Sat 12/06/14: 1
> ----------------------------------------------------------
>
>
> Today's Message Index:
> ----------------------
>
> 1. 02:02 PM - Re: fuel starvation problem while doing a high angle of
> attack, power on stall (j. davis)
>
>
> ________________________________ Message 1
> _____________________________________
>
>
> Time: 02:02:47 PM PST US
> Subject: Re: Zenith750-List: fuel starvation problem while doing a high
> angle
> of attack, power on stall
> From: "j. davis" <jwd3ca@gmail.com>
>
> What were your pre-first-flight fuel flow numbers at various fuel levels
> and angles of attack?
> On 5 Dec 2014 10:52, "Jim Kress" <jim.kress@att.net> wrote:
>
> > On a training flight yesterday in a Zenith STOL 750 with an 0-200 engine
> > we experienced a short stoppage of the engine while doing a prolonged
> high
> > angle of attack, power on stall. We had about half tanks of fuel on
> > board. Once the engine quit we lowered the nose and immediately turned
> on
> > the electric fuel pump. The engine came back to life and the rest of the
> > flight was uneventful. This phenomenon was not experienced during the 40
> > hour flight testing period.
> > There is a placard advising that the "electric boost pump should be used
> > for takeoff and landing", however perhaps this should be changed to say,
> "
> > electric boost pump should be used during training maneuvers and low
> level
> > operations" or something like that.
> > Jim Kress CFII
> >
> > *
> >
> >
> > *
> >
> >
>
>
Message 3
| INDEX | Back to Main INDEX |
| PREVIOUS | Skip to PREVIOUS Message |
| NEXT | Skip to NEXT Message |
| LIST | Reply to LIST Regarding this Message |
| SENDER | Reply to SENDER Regarding this Message |
|
| Subject: | Re: Zenith750-List Digest: 1 Msgs - 12/06/14 |
I've also had this happen, it's certainly something you need to be aware
can happen and keep your descent shallow when low on fuel. Having a
left/right/both/off fuel selector valve is helpful because you can choose
the fuller tank to land with, But the header tank solution is the best
solution, something I've had on my to-do list for a long time. I'd be
interested in more details of your tank installation. Thanks!
On 7 December 2014 at 12:17, Bruce Cruikshank <n5959z@gmail.com> wrote:
> Jim,
>
> I have a slatless 0-200 powered 750, and use gravity flow, no pumps. I
> checked the fuel flow at a 15 degree nose high attitude. The last 3
> gallons drained in 11.75 minutes or a rate of 15.3 GPH. I have markings on
> the jury struts that are level with the horizon at 15 degrees nose high.
> The problem I had was making a nose low descent into a controlled airport
> trying to keep up with other traffic. The engine quite. As I was flaring
> to land off airport the engine caught. After landing back at the airport I
> checked and had 5 gallons of fuel. So I did a test; in a 6 degree nose low
> attitude there was 5.2 gallons unusable in the 24 gallon tanks. I added a
> 0.8 gallon header tank behind the pilots head to fix the problem. Many
> certified high wing airplanes have fuel drains at the front and rear of the
> tanks.
>
> On Sun, Dec 7, 2014 at 12:01 AM, Zenith750-List Digest Server <
> zenith750-list@matronics.com> wrote:
>
>> *
>>
>> ========================
>> Online Versions of Today's List Digest Archive
>> ========================
>>
>> Today's complete Zenith750-List Digest can also be found in either of the
>> two Web Links listed below. The .html file includes the Digest formatted
>> in HTML for viewing with a web browser and features Hyperlinked Indexes
>> and Message Navigation. The .txt file includes the plain ASCII version
>> of the Zenith750-List Digest and can be viewed with a generic text editor
>> such as Notepad or with a web browser.
>>
>> HTML Version:
>>
>>
>> http://www.matronics.com/digest/digestview.php?Style=82701&View=html&Chapter 14-12-06&Archive=Zenith750
>>
>> Text Version:
>>
>>
>> http://www.matronics.com/digest/digestview.php?Style=82701&View=txt&Chapter 14-12-06&Archive=Zenith750
>>
>>
>> ======================
>> EMail Version of Today's List Digest Archive
>> ======================
>>
>>
>> ----------------------------------------------------------
>> Zenith750-List Digest Archive
>> ---
>> Total Messages Posted Sat 12/06/14: 1
>> ----------------------------------------------------------
>>
>>
>> Today's Message Index:
>> ----------------------
>>
>> 1. 02:02 PM - Re: fuel starvation problem while doing a high angle
>> of attack, power on stall (j. davis)
>>
>>
>>
>> ________________________________ Message 1
>> _____________________________________
>>
>>
>> Time: 02:02:47 PM PST US
>> Subject: Re: Zenith750-List: fuel starvation problem while doing a high
>> angle
>> of attack, power on stall
>> From: "j. davis" <jwd3ca@gmail.com>
>>
>> What were your pre-first-flight fuel flow numbers at various fuel levels
>> and angles of attack?
>> On 5 Dec 2014 10:52, "Jim Kress" <jim.kress@att.net> wrote:
>>
>> > On a training flight yesterday in a Zenith STOL 750 with an 0-200 engine
>> > we experienced a short stoppage of the engine while doing a prolonged
>> high
>> > angle of attack, power on stall. We had about half tanks of fuel on
>> > board. Once the engine quit we lowered the nose and immediately turned
>> on
>> > the electric fuel pump. The engine came back to life and the rest of the
>> > flight was uneventful. This phenomenon was not experienced during the
>> 40
>> > hour flight testing period.
>> > There is a placard advising that the "electric boost pump should be used
>> > for takeoff and landing", however perhaps this should be changed to
>> say, "
>> > electric boost pump should be used during training maneuvers and low
>> level
>> > operations" or something like that.
>> > Jim Kress CFII
>> >
>> > *
>> >
>> >
>> > *
>> >
>> >
>>
>>
>>
>>
>> ==========
>> br> fts!)
>> r> > com" target="_blank">www.aeroelectric.com
>> w.buildersbooks.com" target="_blank">www.buildersbooks.com
>> p.com" target="_blank">www.homebuilthelp.com
>> e.com" target="_blank">www.mypilotstore.com
>> " target="_blank">www.mrrace.com
>> target="_blank">http://www.matronics.com/contribution
>> -Matt Dralle, List Admin.
>> ==========
>> br> th750-List" target="_blank">
>> http://www.matronics.com/Navigator?Zenith750-List
>> ==========
>> FORUMS -
>> _blank">http://forums.matronics.com
>> ==========
>>
>>
>>
>>
>>
> *
>
>
> *
>
>
--
Regards, J.
-----------------------------
J. Davis,
- Zenith STOL CH750 C-FJNJ: Jab 3300, Whilrwind GA prop, AeroCarb
- Sonex #325 (ex)C-FJNJ, Jab 3300a, Prince P-Tip, Aerocarb
- former C-IGGY CH701 owner/builder
- see these and more at http://cleco.ca
Other Matronics Email List Services
These Email List Services are sponsored solely by Matronics and through the generous Contributions of its members.
-- Please support this service by making your Contribution today! --
|