Today's Message Index:
----------------------
1. 01:13 AM - Re: Hydrostatic tests (Jan Mevis)
2. 01:47 AM - Re: Hydrostatic tests (Richard Goode)
3. 02:01 AM - Re: Hydrostatic tests (Jan Mevis)
4. 05:21 AM - Yak Gills or Sukhoi Iris (Peter Miramon)
5. 08:49 AM - Re: Hydrostatic tests (Todd McCutchan)
6. 09:41 AM - Re: Hydrostatic tests (Walter Lannon)
7. 11:16 AM - Re: Hydrostatic tests (Jan Mevis)
Message 1
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| Subject: | Re: Hydrostatic tests |
In France, every five years.
Jan
From: Todd McCutchan <todd@fastaircraft.com>
Subject: Yak-List: Hydrostatic tests
How often is the hydrostatic test of the main and emergency bottles
required?
Todd McCutchan
Fast Aircraft
T-34A & Yak-50
Cell - 260.402.1740
Email: todd@fastaircraft.com
Skype: tmccutchan
Web: www.fastaircraft.com <http://www.fastaircraft.com/> &
www.toddmccutchanairshows.com <http://www.toddmccutchanairshows.com/>
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| Subject: | Hydrostatic tests |
Hi Todd,
I can tell you from experience that the real problem in both undercarriages
and the high-pressure air bottles is water, and so many Western pilots do
not methodically drain the system at least every day.
Once water starts getting into the retraction cylinders, they quickly
corrode, and while they should have an overhaul life of only six years, this
can be dramatically reduced. Equally, I can tell you that we had a yak 50
where the high-pressure bottle blew up while the aircraft was on the ground,
causing incredible damage, and certainly would have brought the aircraft
down had it been airborne! Again, totally due to water getting inside and
corroding the bottle internally.
My own leaf is to test the bottle to 100 bar (twice operating pressure)
every year!
Regards
Richard
Richard Goode Aerobatics
Rhodds Farm
Lyonshall
Hereford
HR5 3LW
Tel: +44 (0) 1544 340120
Fax: +44 (0) 1544 340129
www.russianaeros.com
From: owner-yak-list-server@matronics.com
[mailto:owner-yak-list-server@matronics.com] On Behalf Of Todd McCutchan
Sent: 28 September 2013 00:44
Subject: Yak-List: Hydrostatic tests
How often is the hydrostatic test of the main and emergency bottles
required?
Todd McCutchan
Fast Aircraft
T-34A & Yak-50
Cell - 260.402.1740
Email: todd@fastaircraft.com
Skype: tmccutchan
Web: www.fastaircraft.com <http://www.fastaircraft.com/> &
www.toddmccutchanairshows.com <http://www.toddmccutchanairshows.com/>
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| Subject: | Re: Hydrostatic tests |
You are absolutely right Richard.
And although according to the Kardex, I only have to check hydrostatically
every 5 years, I do it annually too.
I can imagine that this is less urgent in dry desert-like regions, but in
Western Europe it's appropriate to do it yearly.
Same thing: servicing of the gear actuators each winter, plane on jacks,
with the whole scenario of swing-testing.
Jan
From: Richard Goode <richard.goode@russianaeros.com>
Subject: RE: Yak-List: Hydrostatic tests
Hi Todd,
I can tell you from experience that the real problem in both undercarriages
and the high-pressure air bottles is water, and so many Western pilots do
not methodically drain the system at least every day.
Once water starts getting into the retraction cylinders, they quickly
corrode, and while they should have an overhaul life of only six years, this
can be dramatically reduced. Equally, I can tell you that we had a yak 50
where the high-pressure bottle blew up while the aircraft was on the ground,
causing incredible damage, and certainly would have brought the aircraft
down had it been airborne! Again, totally due to water getting inside and
corroding the bottle internally.
My own leaf is to test the bottle to 100 bar (twice operating pressure)
every year!
Regards
Richard
Richard Goode Aerobatics
Rhodds Farm
Lyonshall
Hereford
HR5 3LW
Tel: +44 (0) 1544 340120
Fax: +44 (0) 1544 340129
www.russianaeros.com
From: owner-yak-list-server@matronics.com
[mailto:owner-yak-list-server@matronics.com] On Behalf Of Todd McCutchan
Sent: 28 September 2013 00:44
Subject: Yak-List: Hydrostatic tests
How often is the hydrostatic test of the main and emergency bottles
required?
Todd McCutchan
Fast Aircraft
T-34A & Yak-50
Cell - 260.402.1740
Email: todd@fastaircraft.com
Skype: tmccutchan
Web: www.fastaircraft.com <http://www.fastaircraft.com/> &
www.toddmccutchanairshows.com <http://www.toddmccutchanairshows.com/>
http://www.matronics.com/Navigator?Yak-List
http://forums.matronics.com
http://www.matronics.com/contribution
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| Subject: | Yak Gills or Sukhoi Iris |
Still in need of a set of Gills or a Sukhoi iris for my Yak 55 M. If you know of
any available preferably the iris please contact me @ miramon@comcast.net or
call me @ 503-705-8530.
Thanks
Peter Miramon
Yak 55M N1001L
Sent from my iPad
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| Subject: | Re: Hydrostatic tests |
Thanks guys.
I live in AZ so will have a think about the bottles. Obviously a good scopin
g is in order annually. I have seen some pics of the 50 that the bottle blew
and have no desire for a repeat performance over here.
So landing gear seals every 6 years then?
Todd McCutchan
T-34A & Yak-50
Cell (260) 402-1740
E-mail todd@fastaircraft.com
www.fastaircraft.com
> On Sep 28, 2013, at 1:58 AM, Jan Mevis <jan.mevis@informavia.be> wrote:
>
> You are absolutely right Richard.
>
> And although according to the Kardex, I only have to check hydrostatically
every 5 years, I do it annually too.
>
> I can imagine that this is less urgent in dry desert-like regions, but in W
estern Europe it's appropriate to do it yearly.
>
> Same thing: servicing of the gear actuators each winter, plane on jacks, w
ith the whole scenario of swing-testing.
>
> Jan
>
> From: Richard Goode <richard.goode@russianaeros.com>
> Date: Saturday 28 September 2013 10:45
> To: "yak-list@matronics.com" <yak-list@matronics.com>
> Subject: RE: Yak-List: Hydrostatic tests
>
> Hi Todd,
>
> I can tell you from experience that the real problem in both undercarriage
s and the high-pressure air bottles is water, and so many Western pilots do n
ot methodically drain the system at least every day.
>
> Once water starts getting into the retraction cylinders, they quickly corr
ode, and while they should have an overhaul life of only six years, this can
be dramatically reduced. Equally, I can tell you that we had a yak 50 where
the high-pressure bottle blew up while the aircraft was on the ground, caus
ing incredible damage, and certainly would have brought the aircraft down ha
d it been airborne! Again, totally due to water getting inside and corroding
the bottle internally.
>
> My own leaf is to test the bottle to 100 bar (twice operating pressure) ev
ery year!
>
> Regards
>
> Richard
>
> Richard Goode Aerobatics
> Rhodds Farm
> Lyonshall
> Hereford
> HR5 3LW
>
> Tel: +44 (0) 1544 340120
> Fax: +44 (0) 1544 340129
> www.russianaeros.com
>
> From: owner-yak-list-server@matronics.com [mailto:owner-yak-list-server@ma
tronics.com] On Behalf Of Todd McCutchan
> Sent: 28 September 2013 00:44
> To: yak-list@matronics.com
> Subject: Yak-List: Hydrostatic tests
>
> How often is the hydrostatic test of the main and emergency bottles requir
ed?
>
> Todd McCutchan
> Fast Aircraft
> T-34A & Yak-50
>
> Cell - 260.402.1740
>
> Email: todd@fastaircraft.com
> Skype: tmccutchan
> Web: www.fastaircraft.com & www.toddmccutchanairshows.com
>
>
>
> http://www.matronics.com/Navigator?Yak-List
> http://forums.matronics.com
> http://www.matronics.com/contribution
>
>
> --
> This message has been scanned for viruses and
> dangerous content by MailScanner, and is
> believed to be clean.
>
>
> ww.matronics.com/Navigator?Yak-List
> com
> ronics.com/contribution
>
>
>
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>
Message 6
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| Subject: | Re: Hydrostatic tests |
Richard;
I hope you are having that done by a qualified shop using the
hydrostatic method. At 100 Bar you are exceeding the allowable test
limit if the Russian specs. are the same as Western. That is typically
5/3 X the max operating pressure. However this does not apply to a
welded bottle.
The CJ6 bottles are welded and the max. hydro test pressure given is 75
Bar. Less than the 83 Bar allowed for a non-welded bottle at the same
operating pressure. I assume the Russian bottles are also welded.
Walt
From: Richard Goode
Sent: Saturday, September 28, 2013 1:45 AM
Subject: RE: Yak-List: Hydrostatic tests
Hi Todd,
I can tell you from experience that the real problem in both
undercarriages and the high-pressure air bottles is water, and so many
Western pilots do not methodically drain the system at least every day.
Once water starts getting into the retraction cylinders, they quickly
corrode, and while they should have an overhaul life of only six years,
this can be dramatically reduced. Equally, I can tell you that we had a
yak 50 where the high-pressure bottle blew up while the aircraft was on
the ground, causing incredible damage, and certainly would have brought
the aircraft down had it been airborne! Again, totally due to water
getting inside and corroding the bottle internally.
My own leaf is to test the bottle to 100 bar (twice operating pressure)
every year!
Regards
Richard
Richard Goode Aerobatics
Rhodds Farm
Lyonshall
Hereford
HR5 3LW
Tel: +44 (0) 1544 340120
Fax: +44 (0) 1544 340129
www.russianaeros.com
From: owner-yak-list-server@matronics.com
[mailto:owner-yak-list-server@matronics.com] On Behalf Of Todd McCutchan
Sent: 28 September 2013 00:44
Subject: Yak-List: Hydrostatic tests
How often is the hydrostatic test of the main and emergency bottles
required?
Todd McCutchan
Fast Aircraft
T-34A & Yak-50
Cell - 260.402.1740
Email: todd@fastaircraft.com
Skype: tmccutchan
Web: www.fastaircraft.com & www.toddmccutchanairshows.com
http://www.matronics.com/Navigator?Yak-Listhttp://forums.matronics.comhtt
p://www.matronics.com/contribution
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| Subject: | Re: Hydrostatic tests |
We have them checked at 75 bar, in France.
That should be enough.
Jan
From: Walter Lannon <wlannon@shaw.ca>
Subject: Re: Yak-List: Hydrostatic tests
Richard;
I hope you are having that done by a qualified shop using the hydrostatic
method. At 100 Bar you are exceeding the allowable test limit if the
Russian specs. are the same as Western. That is typically 5/3 X the max
operating pressure. However this does not apply to a welded bottle.
The CJ6 bottles are welded and the max. hydro test pressure given is 75 Bar.
Less than the 83 Bar allowed for a non-welded bottle at the same operating
pressure. I assume the Russian bottles are also welded.
Walt
From: Richard Goode <mailto:richard.goode@russianaeros.com>
Sent: Saturday, September 28, 2013 1:45 AM
Subject: RE: Yak-List: Hydrostatic tests
Hi Todd,
I can tell you from experience that the real problem in both undercarriages
and the high-pressure air bottles is water, and so many Western pilots do
not methodically drain the system at least every day.
Once water starts getting into the retraction cylinders, they quickly
corrode, and while they should have an overhaul life of only six years, this
can be dramatically reduced. Equally, I can tell you that we had a yak 50
where the high-pressure bottle blew up while the aircraft was on the ground,
causing incredible damage, and certainly would have brought the aircraft
down had it been airborne! Again, totally due to water getting inside and
corroding the bottle internally.
My own leaf is to test the bottle to 100 bar (twice operating pressure)
every year!
Regards
Richard
Richard Goode Aerobatics
Rhodds Farm
Lyonshall
Hereford
HR5 3LW
Tel: +44 (0) 1544 340120
Fax: +44 (0) 1544 340129
www.russianaeros.com
From: owner-yak-list-server@matronics.com
[mailto:owner-yak-list-server@matronics.com] On Behalf Of Todd McCutchan
Sent: 28 September 2013 00:44
Subject: Yak-List: Hydrostatic tests
How often is the hydrostatic test of the main and emergency bottles
required?
Todd McCutchan
Fast Aircraft
T-34A & Yak-50
Cell - 260.402.1740
Email: todd@fastaircraft.com
Skype: tmccutchan
Web: www.fastaircraft.com <http://www.fastaircraft.com/> &
www.toddmccutchanairshows.com <http://www.toddmccutchanairshows.com/>
http://www.matronics.com/Navigator?Yak-List
http://forums.matronics.com
http://www.matronics.com/contribution
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