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tigeryak18t
Joined: 26 Sep 2009
Posts: 233
Location: PARIS FRANCE
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 Posted: Tue Sep 14, 2010 2:17 pm Post subject: Yak 18T |
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G'day to all,
I come back with a few questions concerning the Yak 18T and M14P.
First, I decided to use unleaded 98 as most of my friends yakees.
Since four full fills it seems to work fine . At least as good as with 100LL.
Question is would you recommend to put an automotive lead additive in the fuel?????
Seems that the eastern friends doesn't care about additive.???
Second question. Does anyone have a 50 hours maintenance programm for the M14P. If there is some pics for a beginner that would be great. But at least a card.
Pics of all the fuel filters on the M14P and how to clean them would be so very helpfull....
Third question, is it possible to purchase a hose for charging the main gear shock absorbers???
Then last question, I am looking for a preoiling kit. Does anyone has used one and where to buy it???
Or also a non electrical autonomous warming device for the winter....working with gas or fuel???
Sorry to bother with so many question.
By the way I am happy to annouce my first aerobatic flight in my 18T...very smooth and absolutely non painfull for the plane....2g's max.
So excited!!!!
best regards and safe flights to all
--
Didier BLOUZARD
didier.blouzard(at)gmail.com (didier.blouzard(at)gmail.com)
0624243672
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_________________
Didier Tiger YAK18T
Member of Commemorative Air Force
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jan.mevis(at)informavia.b
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| Posted: Tue Sep 14, 2010 10:25 pm Post subject: Yak 18T |
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Hello Didier,
It will be very difficult to find any lead additive on the market. The existing additives are all without lead. They can be used to get a higher octane number, but as far as I know, they’re all quite toxic (with toluene and benzene compounds) and I have my doubts.
There’s a group of car-oldtimer guys in the UK who sell TEL in small quantities, but it’s very expensive, and you have to be knowledgeable about it’s use. Too much makes things worse. Then you’d better continue with avgas.
Call me off list for the other questions if you want.
BR,
Jan
From: owner-yak-list-server(at)matronics.com [mailto:owner-yak-list-server(at)matronics.com] On Behalf Of Didier Blouzard
Sent: woensdag 15 september 2010 12:15
To: yak-list(at)matronics.com
Subject: Yak 18T
G'day to all,
I come back with a few questions concerning the Yak 18T and M14P.
First, I decided to use unleaded 98 as most of my friends yakees.
Since four full fills it seems to work fine . At least as good as with 100LL.
Question is would you recommend to put an automotive lead additive in the fuel?????
Seems that the eastern friends doesn't care about additive.???
Second question. Does anyone have a 50 hours maintenance programm for the M14P. If there is some pics for a beginner that would be great. But at least a card.
Pics of all the fuel filters on the M14P and how to clean them would be so very helpfull....
Third question, is it possible to purchase a hose for charging the main gear shock absorbers???
Then last question, I am looking for a preoiling kit. Does anyone has used one and where to buy it???
Or also a non electrical autonomous warming device for the winter....working with gas or fuel???
Sorry to bother with so many question.
By the way I am happy to annouce my first aerobatic flight in my 18T...very smooth and absolutely non painfull for the plane....2g's max.
So excited!!!!
best regards and safe flights to all
--
Didier BLOUZARD
didier.blouzard(at)gmail.com (didier.blouzard(at)gmail.com)
0624243672 | Quote: | | http://www.matronics.com/Navigator?Yak-List |
0123456789
[quote][b]
| | - The Matronics Yak-List Email Forum - | | | Use the List Feature Navigator to browse the many List utilities available such as the Email Subscriptions page, Archive Search & Download, 7-Day Browse, Chat, FAQ, Photoshare, and much more:
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mark.bitterlich(at)navy.m
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| Posted: Wed Sep 15, 2010 8:23 am Post subject: Yak 18T |
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Hi Jan,
You took the words out of my mouth. TEL is very difficult to get "over
the shelf".
There have been a lot of interesting articles written lately about
"Alternative Fuels". An expert on fuels from Shell Oil wrote a very
interesting piece about how most people are talking a lot about Octane,
and are paying very little attention to the other things needed that TEL
provides in our aircraft engines.
I am not an aircraft engine expert (as I have said many times). But
from my past experience with other types of engines, I can say that the
first place that you look for damage when running unleaded fuel in an
engine that was designed for it, is the valve seats. I would say the
valves themselves as well, but I *THINK* that the M-14 uses sodium
filled massive valves. I've looked at them and that seems to be
accurate, but I'd like someone else to confirm it. So, I *SUSPECT* that
the M-14 valves can withstand running without lead more than some other
types.
The interesting fact though is that as long as the octane meets spec, an
engine can get by with much less lead than is contained in 100LL. I
have no doubt in my mind that running a 50/50 mix of unleaded and 100LL
would keep the valves and seats happy for a LONG time.
But for what it is worth ... How well an engine "runs" is not a good
basis to determine whether you can operate an engine a long time without
leaded fuel when the original design calls for it. A lot of folks will
argue and debate that point, and that's just fine. Folks can do
whatever they want with equipment they own. Personally though, I would
make it a point ... No matter the cost .... To always run some 100LL
through the engine every couple of tank-fulls. Sure, running a 50/50
mix or so would be even better, but that can be cost prohibitive and
even may not be available in Europe in many locations. But you can
actually get by just running some 100LL through the engine once in
awhile and that will go a LONG way towards preventing the kind of damage
to the seats that can eventually happen.
Be aware that some pilots have claimed to have run M-14's hundreds and
hundreds of hours and the engines are still "just fine". Good for them.
I would still advise throwing some leaded fuel in there every so often,
regardless.
Mark Bitterlich
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jan.mevis(at)informavia.b
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| Posted: Wed Sep 15, 2010 10:35 am Post subject: Yak 18T |
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Hello Mark,
I know of M14P's running for hundreds of hours on cargas. At the end, these
engines were quite "leaky", dripping oil from everywhere, maybe due to the
ethanol in the cargas, maybe because of maintenance issues, I don't know.
Nevertheless, they still were operational, consuming somewhat more oil.
These pilots never mentioned vapour locks, or even carburettor icing. The
Russian engines are really strong, and apparently designed to run with oils
and fuels of variable quality.
Nevertheless, I only feed Avgas 100LL to my engine, and only the best oils
that I can get.
There will be a problem in the not so distant future, Avgas 100 LL being
ruled out (a recent article mentions 2017). But it's of no use, and bad for
one's health if we start worrying all the time. I'm sure we'll find a
workaround when it's due.
All the best,
Jan
--
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