Today's Message Index:
----------------------
1. 05:17 AM - Uneven fuel tank flow (Bill Scruggs)
2. 05:24 AM - Re: Uneven fuel tank flow (Bill Geipel)
3. 05:28 AM - Re: Uneven fuel tank flow (A. Dennis Savarese)
4. 05:45 AM - Re: Uneven fuel tank flow (Ernest Martinez)
5. 05:55 AM - Re: Uneven fuel tank flow (Bill Geipel)
6. 05:57 AM - Re: Uneven fuel tank flow (Roger Kemp)
7. 06:07 AM - Re: Uneven fuel tank flow (Roger Kemp)
8. 06:27 AM - Re: Uneven fuel tank flow (Jon Blake)
9. 09:13 AM - Re: Uneven fuel tank flow (A. Dennis Savarese)
10. 10:48 AM - Instruments for Sale (Jeffd)
11. 04:45 PM - Re: Uneven fuel tank flow (Roger Kemp)
12. 06:01 PM - Re: Uneven fuel tank flow (Dale)
13. 10:05 PM - Yaks in RHV/LVK (Younus Aftab)
14. 11:54 PM - Re: Yaks in RHV/LVK (Frank Stelwagon)
Message 1
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| Subject: | Uneven fuel tank flow |
My Yak 52 fuel tanks will not drain from both evenly. It's not a small
difference, last flight 50 L on one side, 20 L on the other by end of a 1.1
hr flight. Any thoughts on how to remedy this situation?
Bill
Message 2
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| Subject: | Re: Uneven fuel tank flow |
Rudder.
On May 31, 2014, at 6:17, "Bill Scruggs" <bscruggs@charter.net> wrote:
> My Yak 52 fuel tanks will not drain from both evenly. It=99s not a s
mall difference, last flight 50 L on one side, 20 L on the other by end of a
1.1 hr flight. Any thoughts on how to remedy this situation?
>
> Bill
>
>
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>
Message 3
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| Subject: | Re: Uneven fuel tank flow |
The problem is most likely the vent systemcaused by when you fill the
tanks and fuel getting into the vent line. OR by fuel expansion due to
the heating. Just a poor design on the pre-'89 model Yak 52's. Usually
the right vent line fills with fuel and causes the right tank not to
feed properly. You can "step on the full tank"and fly level, holding
that position for a minute or two and usually the fuel in the vent line
will work its way outand the tank will begin feeding.
As Bill said, use the rudder.
Dennis
A. Dennis Savarese
334-285-6263
334-546-8182 (mobile)
www.yak-52.com
Skype - Yakguy1
On 5/31/2014 7:17 AM, Bill Scruggs wrote:
>
> My Yak 52 fuel tanks will not drain from both evenly. It's not a
> small difference, last flight 50 L on one side, 20 L on the other by
> end of a 1.1 hr flight. Any thoughts on how to remedy this situation?
>
> Bill
>
> *
>
>
> *
Message 4
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| Subject: | Re: Uneven fuel tank flow |
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Message 5
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| Subject: | Re: Uneven fuel tank flow |
Do you step on the full tank?
On May 31, 2014, at 6:28, "A. Dennis Savarese" <dsavarese0812@bellsouth.net>
wrote:
> The problem is most likely the vent system caused by when you fill the tan
ks and fuel getting into the vent line. OR by fuel expansion due to the heat
ing. Just a poor design on the pre-'89 model Yak 52's. Usually the right v
ent line fills with fuel and causes the right tank not to feed properly. Yo
u can "step on the full tank" and fly level, holding that position for a min
ute or two and usually the fuel in the vent line will work its way out and t
he tank will begin feeding.
>
> As Bill said, use the rudder.
> Dennis
> A. Dennis Savarese
> 334-285-6263
> 334-546-8182 (mobile)
> www.yak-52.com
> Skype - Yakguy1
> On 5/31/2014 7:17 AM, Bill Scruggs wrote:
>> My Yak 52 fuel tanks will not drain from both evenly. It=99s not a
small difference, last flight 50 L on one side, 20 L on the other by end of
a 1.1 hr flight. Any thoughts on how to remedy this situation?
>>
>> Bill
>>
>>
>>
>
>
>
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>
Message 6
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| Subject: | Re: Uneven fuel tank flow |
Bill,
Rudder and adverse yaw will help right tank imbalance from flying with the b
all not centered. The problem is most likely the vent line from the right ta
nk is blocked by fuel that has essentially vapor locked in the line. That ha
ppened with over filling the right tank or by not venting the tank when sitt
ing in hot weather by not cracking the fuel cap.
It has to do with the older YAK 52 vent line design taking both tank vent li
nes to a single overflow line exit on the belly. Fuel gets caught in the sip
hon from the right tank under your left check in the cockpit
The fix is to take a rubber hose/ PCV (flexible) about 1/4 to 3/8's dia. Hoo
k it too the vent line on the center of the fuselage pretty much right under
the front cockpit and blow air through it until you hear air bubbling in th
e tanks with the caps off the tank of course.
Dennis taught me that trick.
Now if you fly with auto gas there maybe some corrosion of the right tank re
verse flow flapper valve. A bit more rare of a problem though.
VD
Sent from my iPad
> On May 31, 2014, at 7:24 AM, Bill Geipel <l129bs@gmail.com> wrote:
>
> Rudder.
>
>
>
>> On May 31, 2014, at 6:17, "Bill Scruggs" <bscruggs@charter.net> wrote:
>>
>> My Yak 52 fuel tanks will not drain from both evenly. It=99s not a
small difference, last flight 50 L on one side, 20 L on the other by end of
a 1.1 hr flight. Any thoughts on how to remedy this situation?
>>
>> Bill
>>
>>
>> =========================
=========
>> //www.matronics.com/Navigator?Yak-List
>> =========================
=========
>> cs.com
>> =========================
=========
>> matronics.com/contribution
>> =========================
=========
>>
>
>
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>
Message 7
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| Subject: | Re: Uneven fuel tank flow |
Yes with adverse yaw. Snap rolls to the left then the right also works. Usua
lly I raise the right wing with right rudder and left stick to drop the left
wing. If stubborn I go the other (opposite) direction with adverse Yaw as w
ell as while in adverse yaw shake the right up wing by rocking the stick le
ft to right somewhat aggressively may help break the vapor lock. If it still
is not flowing I'll do the snap rolls.
If that did not solve it blow air through the vent line. On the ground of co
urse.
VD
Sent from my iPad
> On May 31, 2014, at 7:54 AM, Bill Geipel <l129bs@gmail.com> wrote:
>
> Do you step on the full tank?
>
>
>
>> On May 31, 2014, at 6:28, "A. Dennis Savarese" <dsavarese0812@bellsouth.n
et> wrote:
>>
>> The problem is most likely the vent system caused by when you fill the ta
nks and fuel getting into the vent line. OR by fuel expansion due to the hea
ting. Just a poor design on the pre-'89 model Yak 52's. Usually the right v
ent line fills with fuel and causes the right tank not to feed properly. Yo
u can "step on the full tank" and fly level, holding that position for a min
ute or two and usually the fuel in the vent line will work its way out and t
he tank will begin feeding.
>>
>> As Bill said, use the rudder.
>> Dennis
>> A. Dennis Savarese
>> 334-285-6263
>> 334-546-8182 (mobile)
>> www.yak-52.com
>> Skype - Yakguy1
>>> On 5/31/2014 7:17 AM, Bill Scruggs wrote:
>>> My Yak 52 fuel tanks will not drain from both evenly. It=99s not a
small difference, last flight 50 L on one side, 20 L on the other by end of
a 1.1 hr flight. Any thoughts on how to remedy this situation?
>>>
>>> Bill
>>
>>
>>
>> =========================
=========
>> //www.matronics.com/Navigator?Yak-List
>> =========================
=========
>> cs.com
>> =========================
=========
>> matronics.com/contribution
>> =========================
=========
>>
>
>
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>
Message 8
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| Subject: | Re: Uneven fuel tank flow |
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Message 9
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| Subject: | Re: Uneven fuel tank flow |
Bill,
If you install one of these ball-check valves in the fuel cap, you will
very likely eliminate the fuel venting problem. We now recommend
installing these ball-check valveswhen installing the fuel bladders in a
52. They would be installed in the bladder filler plate. But the
easiest way to do it with the original metal tanks is to install this
ball-check valve in each fuel cap.
http://www.fuelsafe.com/store/vent-check-valves/1flu101.html
Installing it will provide a second vent line to the orginal tanks.
Dennis
A. Dennis Savarese
334-285-6263
334-546-8182 (mobile)
www.yak-52.com
Skype - Yakguy1
On 5/31/2014 7:28 AM, A. Dennis Savarese wrote:
> The problem is most likely the vent systemcaused by when you fill the
> tanks and fuel getting into the vent line. OR by fuel expansion due to
> the heating. Just a poor design on the pre-'89 model Yak 52's. Usually
> the right vent line fills with fuel and causes the right tank not to
> feed properly. You can "step on the full tank"and fly level, holding
> that position for a minute or two and usually the fuel in the vent
> line will work its way outand the tank will begin feeding.
>
> As Bill said, use the rudder.
> Dennis
> A. Dennis Savarese
> 334-285-6263
> 334-546-8182 (mobile)
> www.yak-52.com
> Skype - Yakguy1
> On 5/31/2014 7:17 AM, Bill Scruggs wrote:
>>
>> My Yak 52 fuel tanks will not drain from both evenly. It's not a
>> small difference, last flight 50 L on one side, 20 L on the other by
>> end of a 1.1 hr flight. Any thoughts on how to remedy this situation?
>>
>> Bill
>>
>> *
>>
>>
>> *
>
> *
>
>
> *
Message 10
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| Subject: | Instruments for Sale |
UMA 1 1/4" Carb Air Temp and probe, used, color range marked for M-14, $75.
UMA 1 1/4" Fuel Pressure, used, color range marked for M-14, $75.
Electronics International M-1 Manifold Pressure, used, needs plastic hose barb
replaced on back of unit. $200.
Electronics International FL-2C dual Fuel Level, used, $195.
Kimball M-14 Air/Oil Separator, used, $40.
Can Email photos
Jeff
jdair(at)sbcglobal.net
Read this topic online here:
http://forums.matronics.com/viewtopic.php?p=424126#424126
Message 11
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| Subject: | Re: Uneven fuel tank flow |
Or a YAK 50!
VD
Sent from my iPad
> On May 31, 2014, at 8:27 AM, Jon Blake <jblake207@comcast.net> wrote:
>
> Buy a CJ... :-)
>
> Sent from my Verizon Wireless 4G LTE DROID
>
>
> Bill Scruggs <bscruggs@charter.net> wrote:
>
> My Yak 52 fuel tanks will not drain from both evenly. It=99s not a s
mall difference, last flight 50 L on one side, 20 L on the other by end of a
1.1 hr flight. Any thoughts on how to remedy this situation?
>
>
>
> Bill
>
>
>
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Message 12
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| Subject: | Re: Uneven fuel tank flow |
Flying around in a left hand pattern all day or left circling or wing low will
cause it every time. Try flying right turns everywhere you go and see what happens.
Left hand turn flying is easy not to notice. Even if tanks are off after
a while one side will stop and then the other side will start draining. It
will get your attention until the high side starts draining. Nothing may need
to be "fixed at all"
Read this topic online here:
http://forums.matronics.com/viewtopic.php?p=424132#424132
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Just joined the list. I am a private pilot and a current Mooney owner
interested in Yaks.
I am based at LVK (Livermore/San Francisco Area) and also fly out of RHV
sometimes.
I started doing aerobatics and thinking about either buying a yak or
getting into partnership. Seems like the perfect plane for my mission going
forward.
Would love to meet people in the area (owners; pilots)
Please let me know if somebody in the area is on the list or if you know
people around here.
Thanks!
Message 14
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| Subject: | RE: Yaks in RHV/LVK |
When at RHV go to the north end of the field and visit Victory Aviation.
Kreg handles numerous Yaks.
Frank
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