Today's Message Index:
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1. 05:44 AM - Re: Re:Dynon pitot (Bob Kelly)
2. 11:39 AM - Re: Re:Dynon pitot (Steve Sampson)
Message 1
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--> RV9-List message posted by: Bob Kelly <mmpi@missionmedia.org>
Leland,
Understand the "homemade manometer," but would like to know where to get a
chart of airspeed vs. inches H2O. Could you share that one?
Thanks,
Bob Kelly, fuse on main gear
On 12/23/04, Leland wrote:
> --> RV9-List message posted by: Leland <Federigo@pacbell.net>
>
> Steve, I simply pressured up the pitot line and called it quits. A pitot
> leakage of this sort is found on many Piper aircraft such as the Warrior
> and Cherokee. When I performed a static test with a "calibrated"
> pressure source, read that as "homemade manometer", the Dynon read from
> 6% high to 2% low, while Van's analogue gauge read from three to five
> percent low. I wonder what the error will be in flight.
> Leland
> Installing the empennage
>
>> After investigating a leak in the pitot line Dynon tell me not to worry
>> since it has a drain built in and this is the leak. However it raises the
>> issue as to how you test the pitot system if there is this leak, since it
>> will disguise any other leak that may exist. What have others done?
>>
>> Thanks, Steve.
>> #90360
>>
>> PS One other thought, how much leakage can one have before it causes
>> siginificant ASI errors?
Message 2
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--> RV9-List message posted by: "Steve Sampson" <SSampson.SLN21@london.edu>
Leland - thanks for the reply. I dont quite understand. Since the Dynon head
has a leak I cant pressurise the line. Well I suppose if I had a constant
flow of air I could, but the leakage is not insignificant. Do you mean that
you had a long loop of manometer so you kept raising one end as the pressure
dropped? Did the 'calibrated' source supply air continuously?
I am really puzzled about this. Since it is a drain according to Dynon it
must leak quite a bit to pass water.
Happy Christmas, Steve.
PS It sounds as though we continue to be at abount the same point. I have
ben fitting the empenage and general snags prior to pushing it into the
hanger for the wings.
-----Original Message-----
From: owner-rv9-list-server@matronics.com
[mailto:owner-rv9-list-server@matronics.com]On Behalf Of Leland
Subject: RV9-List: Re:Dynon pitot
--> RV9-List message posted by: Leland <Federigo@pacbell.net>
Steve, I simply pressured up the pitot line and called it quits. A pitot
leakage of this sort is found on many Piper aircraft such as the Warrior
and Cherokee. When I performed a static test with a "calibrated"
pressure source, read that as "homemade manometer", the Dynon read from
6% high to 2% low, while Van's analogue gauge read from three to five
percent low. I wonder what the error will be in flight.
Leland
Installing the empennage
>After investigating a leak in the pitot line Dynon tell me not to worry
>since it has a drain built in and this is the leak. However it raises the
>issue as to how you test the pitot system if there is this leak, since it
>will disguise any other leak that may exist. What have others done?
>
>Thanks, Steve.
>#90360
>
>PS One other thought, how much leakage can one have before it causes
>siginificant ASI errors?
>
>
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