Today's Message Index:
----------------------
1. 06:56 AM - Re: Bernoilli, His Equation, Air Moving in Pipes and Flight (Ernie)
2. 11:43 AM - Re: Bernoilli, His Equation, Air Moving in Pipes and Flight (Tim Gagnon)
3. 11:43 AM - Re: Bernoilli, His Equation, Air Moving in Pipes and Flight (Tim Gagnon)
4. 11:54 AM - Re: Bernoilli, His Equation, Air Moving in Pipes and Flight (Tim Gagnon)
5. 11:57 AM - Can someone GIVE me 850K (Tim Gagnon)
6. 12:15 PM - Re: Re: Bernoilli, His Equation, Air Moving in Pipes and Flight (Yak Pilot)
7. 12:40 PM - Re: Bernoilli, His Equation, Air Moving in Pipes and Flight (Tim Gagnon)
8. 12:46 PM - Back to Tim's problem (was: Bernoilli, His Equation, Air Moving in Pipes and Flight) (Brian Lloyd)
9. 02:37 PM - Re: Back to Tim's problem (was: Bernoilli, His Equation, Air Mov (Scooter)
10. 04:55 PM - Re: Back to Tim's problem (was: Bernoilli, His Equation, Air Moving in Pipes and Flight) (Terry Lewis)
11. 05:06 PM - Re: Back to Tim's problem (was: Bernoilli, His Equation, Air Moving in Pipes and Flight) (Brian Lloyd)
Message 1
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| Subject: | Re: Bernoilli, His Equation, Air Moving in Pipes and Flight |
Magnus has no effect on the burrple destrofunkenspicthen, when bernouli tickles
his testicular nipplefricker. Now on the other hand, if you diassemble the pooter
evector during a combined molecular fusion butterjamtoastgotshitonmyshirt
event, then you may ripp the goddam wings off of the plane.
Ernie
Read this topic online here:
http://forums.matronics.com/viewtopic.php?p=135747#135747
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| Subject: | Re: Bernoilli, His Equation, Air Moving in Pipes and Flight |
Ernie wrote:
> Magnus has no effect on the burrple destrofunkenspicthen, when bernouli tickles
his testicular nipplefricker. Now on the other hand, if you diassemble the
pooter evector during a combined molecular fusion butterjamtoastgotshitonmyshirt
event, then you may ripp the goddam wings off of the plane.
>
> Ernie
Exactly.....
(The new spell checker went nuts on this)
Read this topic online here:
http://forums.matronics.com/viewtopic.php?p=135779#135779
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| Subject: | Re: Bernoilli, His Equation, Air Moving in Pipes and Flight |
Ernie wrote:
> Magnus has no effect on the burrple destrofunkenspicthen, when bernouli tickles
his testicular nipplefricker. Now on the other hand, if you diassemble the
pooter evector during a combined molecular fusion butterjamtoastgotshitonmyshirt
event, then you may ripp the goddam wings off of the plane.
>
> Ernie
Exactly.....
(The new spell checker went nuts on this)
Read this topic online here:
http://forums.matronics.com/viewtopic.php?p=135778#135778
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| Subject: | Re: Bernoilli, His Equation, Air Moving in Pipes and Flight |
I spoke to the mechanic who did the work on my airplane. Before anyone jumps on
him for "shoulda known better", the guy does amazing work and the use of the
a smaller diameter line was talked about. His lack of experience with Yaks and
my...hmmm...lack of thorough knowledge lead us towards using the fill line from
the fill port instead of running a new line from the new bottle (behind my
seat). So, we will replace the line with one of original diameter. We will also
check for leaks....
Sooo......a few observations from todays flight and something that may add a wrench
to the works...OR....turn a light bulb on for someone.
Go to the airplane to fly this morning. Gauge reads about 40. Turn on the main
valve, pressure drops to about 20. Hmmmm...small leak somewhere downstream of
the bottle? (The airplane has been sitting for about a week or so) She starts
perfectly after a few blades, I let her warm up to 120c+ and when I push the
lever forward, I have about 40 ATM. This is after about 6 or 7 minutes from start
to throttle up for take off. Making good pressure. Lift off, gear handle up,
that big pressure drop (20+ atm) but gears comes home nicely with a reassuring
thump. Pressure rebuilds to >55 ATM after somewhere between 5-10 minutes of
flying. Go flip around a bit, come back into the pattern, gear down off the
perch, big pressure drop (same pressure drop) and gear thumps nicely. Land with
about 25 atm in the airplane. Run up, pressure builds back up to 40 or so,
but did something new this time....hopefully not unsafe.
Brakes on, run up to 70% for about a minute, pressure builds to about 40, then
I SHUT OFF (engine still running) the main valve and the pressure builds to about
55 ATM and I shut her down.
I have some thoughts but want to verify mine with yours....you guys are way smarter
than I am.
I am glad this thread has generated some healthy, yet calm, discussion. I have
learned much...
One more question. What are you guys normal oil temps in cruise at a crusie power
setting.
Read this topic online here:
http://forums.matronics.com/viewtopic.php?p=135781#135781
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| Subject: | Can someone GIVE me 850K |
I want this airplane!
http://www.courtesyaircraft.com/Lavochkin%20LA-9%20Spec.htm
Read this topic online here:
http://forums.matronics.com/viewtopic.php?p=135782#135782
Message 6
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| Subject: | Re: Bernoilli, His Equation, Air Moving in Pipes and Flight |
I am starting to wonder whether you might just have a bad gage. Checked for that
yet?
Mark
Tim Gagnon <NiftyYak50@fuse.net> wrote:
I spoke to the mechanic who did the work on my airplane. Before anyone jumps on
him for "shoulda known better", the guy does amazing work and the use of the
a smaller diameter line was talked about. His lack of experience with Yaks and
my...hmmm...lack of thorough knowledge lead us towards using the fill line from
the fill port instead of running a new line from the new bottle (behind my
seat). So, we will replace the line with one of original diameter. We will also
check for leaks....
Sooo......a few observations from todays flight and something that may add a wrench
to the works...OR....turn a light bulb on for someone.
Go to the airplane to fly this morning. Gauge reads about 40. Turn on the main
valve, pressure drops to about 20. Hmmmm...small leak somewhere downstream of
the bottle? (The airplane has been sitting for about a week or so) She starts
perfectly after a few blades, I let her warm up to 120c+ and when I push the lever
forward, I have about 40 ATM. This is after about 6 or 7 minutes from start
to throttle up for take off. Making good pressure. Lift off, gear handle up,
that big pressure drop (20+ atm) but gears comes home nicely with a reassuring
thump. Pressure rebuilds to >55 ATM after somewhere between 5-10 minutes of
flying. Go flip around a bit, come back into the pattern, gear down off the perch,
big pressure drop (same pressure drop) and gear thumps nicely. Land with
about 25 atm in the airplane. Run up, pressure builds back up to 40 or so, but
did something new this time....hopefully not unsafe.
Brakes on, run up to 70% for about a minute, pressure builds to about 40, then
I SHUT OFF (engine still running) the main valve and the pressure builds to about
55 ATM and I shut her down.
I have some thoughts but want to verify mine with yours....you guys are way smarter
than I am.
I am glad this thread has generated some healthy, yet calm, discussion. I have
learned much...
One more question. What are you guys normal oil temps in cruise at a crusie power
setting.
Read this topic online here:
http://forums.matronics.com/viewtopic.php?p=135781#135781
Message 7
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| Subject: | Re: Bernoilli, His Equation, Air Moving in Pipes and Flight |
Nope...but I will add that to the list of things to check!
Read this topic online here:
http://forums.matronics.com/viewtopic.php?p=135791#135791
Message 8
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| Subject: | Back to Tim's problem (was: Bernoilli, His Equation, Air Moving |
in Pipes and Flight)
On Sep 22, 2007, at 11:53 AM, Tim Gagnon wrote:
> pattern, gear down off the perch, big pressure drop (same pressure
> drop) and gear thumps nicely. Land with about 25 atm in the
> airplane. Run up, pressure builds back up to 40 or so, but did
> something new this time....hopefully not unsafe.
>
> Brakes on, run up to 70% for about a minute, pressure builds to
> about 40, then I SHUT OFF (engine still running) the main valve and
> the pressure builds to about 55 ATM and I shut her down.
One comment. Everything is working but you are getting a big pressure
change with gear actuation and a rapid pressure recovery. If you had
a leak, the pressure would keep going down but your pressure comes
right back up again. That says to me, no leak. The big changes in
pressure also tell me, small volume. Check your tank. Something is
taking up a lot of space in there and leaving you with very little
system volume.
--
Brian Lloyd 3191 Western Drive
brian HYPHEN 1927 AT lloyd DOT com Cameron Park, CA 95682
+1.916.367.2131 (voice) +1.270.912.0788 (fax)
I fly because it releases my mind from the tyranny of petty things . . .
Antoine de Saint-Exupry
PGP key ID: 12095C52A32A1B6C
PGP key fingerprint: 3B1D BA11 4913 3254 B6E0 CC09 1209 5C52 A32A 1B6C
Message 9
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| Subject: | Re: Back to Tim's problem (was: Bernoilli, His Equation, Air |
Mov
I can't recall how the Yak-50 air system is set up... If this were a 52 I'd almost
think (going under Brian's theory) that the main and reserve bottles were
swapped. This would account for a big pressure drop when turning on the main
valve and quick recharge. But it's probably unlikely the reserve tubing was
mucked with.
Other guess would be a variable leak downstream from the main valve. If this were
the case then it would appear to seal up a bit as pressure was applied - but
not completely - and is not allowing anything over 40atm. If it were a bottle
swap as in the first case then you'd still get the 55atm. I'd bet on the
leak. You should get this Bernouilli guy to check it out.
Read this topic online here:
http://forums.matronics.com/viewtopic.php?p=135804#135804
Message 10
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| Subject: | Re: Back to Tim's problem (was: Bernoilli, His Equation, Air |
Moving in Pipes and Flight)
Water?
Terry
----- Original Message -----
From: "Brian Lloyd" <brian-1927@lloyd.com>
Sent: Saturday, September 22, 2007 3:45 PM
Subject: Yak-List: Back to Tim's problem (was: Bernoilli, His Equation, Air
Moving in Pipes and Flight)
>
> On Sep 22, 2007, at 11:53 AM, Tim Gagnon wrote:
>
>> pattern, gear down off the perch, big pressure drop (same pressure drop)
>> and gear thumps nicely. Land with about 25 atm in the airplane. Run up,
>> pressure builds back up to 40 or so, but did something new this
>> time....hopefully not unsafe.
>>
>> Brakes on, run up to 70% for about a minute, pressure builds to about
>> 40, then I SHUT OFF (engine still running) the main valve and the
>> pressure builds to about 55 ATM and I shut her down.
>
> One comment. Everything is working but you are getting a big pressure
> change with gear actuation and a rapid pressure recovery. If you had a
> leak, the pressure would keep going down but your pressure comes right
> back up again. That says to me, no leak. The big changes in pressure also
> tell me, small volume. Check your tank. Something is taking up a lot of
> space in there and leaving you with very little system volume.
>
>
> --
> Brian Lloyd 3191 Western Drive
> brian HYPHEN 1927 AT lloyd DOT com Cameron Park, CA 95682
> +1.916.367.2131 (voice) +1.270.912.0788 (fax)
>
> I fly because it releases my mind from the tyranny of petty things . . .
> Antoine de Saint-Exupry
>
> PGP key ID: 12095C52A32A1B6C
> PGP key fingerprint: 3B1D BA11 4913 3254 B6E0 CC09 1209 5C52 A32A 1B6C
>
>
>
Message 11
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| Subject: | Re: Back to Tim's problem (was: Bernoilli, His Equation, Air |
Moving in Pipes and Flight)
On Sep 22, 2007, at 4:54 PM, Terry Lewis wrote:
>
> Water?
Ah! I was trying to think of something that might be in the tank
taking up space but couldn't think of anything off hand. Water would
do it.
But as I said before, Tim needs to look everything over really well.
Something's rotten in Denmark. We are just guessing right now and
while I think my troubleshooting is well reasoned, it doesn't take
the place of actually going to look.
> Terry
--
Brian Lloyd 3191 Western Drive
brian HYPHEN 1927 AT lloyd DOT com Cameron Park, CA 95682
+1.916.367.2131 (voice) +1.270.912.0788 (fax)
I fly because it releases my mind from the tyranny of petty things . . .
Antoine de Saint-Exupry
PGP key ID: 12095C52A32A1B6C
PGP key fingerprint: 3B1D BA11 4913 3254 B6E0 CC09 1209 5C52 A32A 1B6C
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