Today's Message Index:
----------------------
1. 12:48 AM - Re: YAK 18T (Buzzard Aviation)
2. 03:38 AM - Re: Breathing Clean Air - Masks? (Lance Robb)
3. 07:13 AM - Re: YAK 18T (Hank Gibson)
4. 10:14 AM - Yak-18Ts (Richard Goode)
Message 1
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At 16:44 24/01/2007, you wrote:
>
>A new endeavor for me. Any thoughts/ advice on
>acquiring a YAK 18T. What is required for import to
>the USA? There are some for sale in Eastonia, Ukrane,
>and Lithuania. It seems like a great airplane and I
>would like the challenge of getting one if reasonable
>possible.
>
>Thanks
>
>Jim
Jim,
We are currently putting ours on the market here in the UK. E:mail me
off list if you'd like pictures or magazine articles about it/them.
martin@cub.flyer.co.uk
Happy Landings
____|____
\O/
o'o Martin Robinson
Auster AOP 9 G-BKVK (WZ662)
Yak 18T HA-YAV
Message 2
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| Subject: | Breathing Clean Air - Masks? |
Hi Doc,
That all makes very good sense but do the inlet valves really leak that
much
exhaled air back into the inlet pipe?
I would have thought that the valve would have closed as soon as there
is a
positive pressure inside the mask stopping it=85=85..The valve on my
mask sure
seems to shut tight and quickly.
Is it still not enough and maybe that=92s the case as the designers were
planning on it being used with a pressurized supply.
Thanks for all your input=85=85.It=92s very interesting stuff.
Lance Robb
NQ Warbirds
Mareeba
Australia
_____
From: owner-yak-list-server@matronics.com
[mailto:owner-yak-list-server@matronics.com] On Behalf Of Roger Kemp
Sent: Thursday, 25 January 2007 11:12 AM
Subject: RE: Yak-List: Breathing Clean Air - Masks?
Lance,
The issue you face with using the aviator's mask without a fresh air
source
is related to dead space air. The hose on the aviator's mask is is about
18
to 24 inches long. So each time you exhale you push air high in C02 down
that hose. Now when you take a breath, you suck that air back in. Then
you
repeat the process when you again. This process is known a entrainment.
There is a push pull action taking place in the hose. If regular
respiration
takes place without something diluting it out like sticking it out into
the
wind stream (pressure breathing per say), the PC02 in the hose will
gradually become equal the PC02 of your exhaled air. So over time you
would
gradually see a rise in your arterial PCO2, With that long hose hanging
off
the mask that you are breathing through you have increased dead space of
your airway. Dead space is defined as that part of the air way that is
not
involved in gas exchange. So your mouth, nose (n asopharynx), trachea,
and
the first branch of the Bronchi (primary bronchus) are all what is
considered dead space. Now that you have added that extra 2 feet of dead
space to your airway, your are increasing your work of breathing and
that
will result in an increase in your exhaled PC02 also. There some other
factors that I could bore you with relating to the pressure differential
between alveolar PC02 at inspiration verses exhalation ect. In other
words,
the blood arriving at the alveolus (the site of gas exchange in the
lung) is
high in CO2 (the Pulmonary Artery- the only artery in the body that is
higher in C02 the a vein, Pulmonary Vein). The freshly inspired air is
low
in C02 and high in 02. So there is a pressure gradient that exist in the
alveolus verses the pulmonary artery. So C02 diffuses easily from an
area of
higher concentration to lower concentration. Now if you keep sucking
fresh
air into your alveolus that is high in C02, then you do not get the
diffusi
on of C02 out of your blood stream. So there is gradual increase in the
PAC02 in your blood. Then all the I talked about in the other post
starts to
take place.
The 3M mask does not present that problem. If it is the version that I
am
thinking about. It has one or two screw in filters on either side of the
rubber mask. Some have a single filter on one side. Even though you
will
see a slight increase in the PC02, it will be pretty much negligible.
The
filters on the mask are designed to be very porous so as to facilitate
elimination of exhaled gases and decrease work of breathing by not
offering
alot of resistance to inspiration. Measuring end tidal C02 in the mask
does
not show a significant increase in C02 in that type of mask in the
studies I
have seen in the Occupational Medicine texts. That mask can be hot as
hell
to wear but it is safe to use though. I don't think you have a lot to
worry
about with the 3 M mask.
Hope this helps alleviate your concern about the 3 M mask,
Doc
--
24/01/2007
6:48 PM
--
24/01/2007
6:48 PM
Message 3
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Jim,
Try Louie Ihnen ((217)696-2445 H / (217)440-8490 M) in Quincy, IL. He has one
and is restoring it in the Air USA shop with the help of a Czech mechanic.
That outfit has been one of the main importers of L-39's and Mig's for a few years
and also brought in 4 CJ's from China in the 90's. I bought Louie's CJ in
Aug and he is a great guy; retired IL highway patrolman and conscientious mechanic.
Had to sell the CJ because of the YAK-18T project. Give him a call.
Hank Gibson
Jacksonville, FL
Jim Evans <jimboevans@yahoo.com> wrote:
A new endeavor for me. Any thoughts/ advice on
acquiring a YAK 18T. What is required for import to
the USA? There are some for sale in Eastonia, Ukrane,
and Lithuania. It seems like a great airplane and I
would like the challenge of getting one if reasonable
possible.
Thanks
Jim
8:00? 8:25? 8:40? Find a flick in no time
with the Yahoo! Search movie showtime shortcut.
http://tools.search.yahoo.com/shortcuts/#news
Hank Gibson
904-994-6005 Mobile
912-484-6001 Home
hkgibby@yahoo.com
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Message 4
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We have sold something life twenty-five Yak-18Ts to different parts of
the world.
A real problem outside Europe is that of shipping them, simply because
they will not fit into a standard shipping container.
The options are:
a.. Remove the wings and make a steel palette on which the fuselage is
mounted, with wings securely put underneath. Then wrap the whole
aeroplane in plastic, and it goes on top of the top container, since the
centre section, with hte wings off, is too wide on a ship.
b.. Or you can put it into a "high top" container, again by removing
the wings and mounting the aircraft vertically but sideways - i.e. on
the centre section root, with it being stabilised by the other (top)
centre section.
Both methods achievable, but you need to know how to do them.
A light 18T with 400 hp; and 3-blade prop really is quite a performer.
Mine will cruise at 164 knots; 6 hours endurance; will land and take off
in 400 yards at maximum gross and, with full inverted systems very
aerobatic!
As I told some of you the Smolensk factory is starting on a new batch of
sixty aircraft for pilot training - price US $400,000 each. However it
does mean that new engines will be made for the first time since 1984.
Richard Goode Aerobatics
Rhodds Farm
Lyonshall
Herefordshire
HR5 3LW
United Kingdom
Tel: +44 (0) 1544 340120
Mob: +44 (0) 7768 610389
Fax: +44 (0) 1544 340129
www.russianaeros.com
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