Today's Message Index:
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1. 12:31 AM - Instruments (Mark Jefferies)
2. 12:32 AM - :>)) (Mark Jefferies)
3. 04:53 AM - Re: M14P Tach Generator / Yak 50 Fuel Sender (aaron marshall)
4. 05:05 AM - Re: Oil (aaron marshall)
5. 06:08 AM - Re: Yak-List Digest: 19 Msgs - 03/11/05 (Steve Dalton)
6. 06:38 PM - SNF 60 Cancelled (cpayne@joimail.com)
7. 06:38 PM - Re: UMA Tach (cpayne@joimail.com)
8. 08:42 PM - Re: Re: UMA Tach (DaBear)
Message 1
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--> Yak-List message posted by: "Mark Jefferies" <mark.j@yakuk.com>
Through necessity Aerostar have had to use instruments and other parts
originating from the USA. This is due to the fact that instruments were
supplied from Russia, in former times. The Russian instruments were made for
the military, cost was not a consideration, reliability was. Russian
instrument are superior, no getting away from that.
The manufactures of instruments now don't exist and those that do priced
themselves out of the market.
Aerostar, through necessity had to use USA instruments made on a budget,
many non certified and poor quality. These do fail on a regular basis, they
are just not made to withstand the harsh environment demanded by the YAK.
The clever part was calling it YAK 52 W (west) making it sound like
specially made for the USA market to "higher and familiar" presentation/
quality.
++++++++++++++
FWIW, the UMA tach generators which are used on the 52TW/W have exhibited
oil leaks and failures much more frequently that any Russian tach generator.
As an example, I have replace the UMA tach generator on a 52TW 3 times for
precisely the problems I mentioned.
Dennis
Message 2
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--> Yak-List message posted by: "Mark Jefferies" <mark.j@yakuk.com>
:>)))
The world does not yet understand !!!!
++++++++++++++++
P.S. My price estimate is based on what I paid to have them shipped from
Russia... which is an experience I would recommend that no one here tries to
duplicate. It was a real learning experience.
Message 3
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| Subject: | Re: M14P Tach Generator / Yak 50 Fuel Sender |
(not processed: message from valid local sender)
--> Yak-List message posted by: "aaron marshall" <aaron@marshallservices.com>
I have a 52TW and I have had the UMA generator apart twice. It was found
loose upon initial assembly when it came off the boat. We tightened it and
re-installed it. It loosesned up again within 10 hours. I think I fixed it
for good now though as It has not loosened up in the last 45 hours. I
suggest if you buy one you remove the tiny screws from around the outside of
the barrel and open the generator housing. Make note of which color wires
go where (ther are 3) and de-solder them from the little board. This will
allow you to get a socket in the case half to remove the flat nut that holds
the plug to the housing (this is what kept loosenign up on mine). Put some
high strength Lock-Tight on the flat nut and tighten fimly. re-solder the 3
wires and reassemble the case. Put lock-tight on the 4 tiny screws that
hold the case canister to the generator assembly as well as these were also
loosening from vibration and oil penetration. I'll report back to the list
if I find this fails and it loosens up again. UMA has been good to work
with. They send parts out immediately and are very reasonable.
Aaron
N343DC
YAK 52TW
Message 4
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(not processed: message from valid local sender)
--> Yak-List message posted by: "aaron marshall" <aaron@marshallservices.com>
Regarding heat pads and warmup. I have studied the manuals and examined the
components under the cowling carefully and I odn't understand why if the oil
in the tank is 160 degrees as well as the sump (fronm pre-heat pads on all
night), and the rest of the engine and oil is at least 60 degrees in a
heated hangar, it still takes 7-10 minutes to see 104 on the oil temp gage,
at first flight. It appears that the oil temp probe is in the assembly
connected the large filter screen cannister on the botton of the firewall
(52TW). It appears that this location would get hot oil from the tank right
away. Is this not where the temp probes are? Or is this the last place to
get oil and therefore getting the cold cooler and system oil at first?
Aaron
N343DC
YAK 53TW
Message 5
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| Subject: | RE: Yak-List Digest: 19 Msgs - 03/11/05 |
--> Yak-List message posted by: "Steve Dalton" <sdalton@goeaston.net>
--> Yak-List message posted by: "A. Dennis Savarese"
<DSAVARESE@ELMORE.RR.COM>
FWIW, the UMA tach generators which are used on the 52TW/W have
exhibited
oil leaks and failures much more frequently that any Russian tach
generator.
As an example, I have replace the UMA tach generator on a 52TW 3 times
for
precisely the problems I mentioned.
Dennis
Dennis,
I found that replacing the $0.05 O-ring on the Tach drive (which takes
10 minutes to do) will stop the oil leak. Mine has been dry now for
over 100 hrs. I *think* that if you are not careful you can slightly
tear/twist the oil ring during installation and it will soon leak again.
Cheers,
Steve Dalton
Message 6
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| Subject: | SNF 60 Cancelled |
--> Yak-List message posted by: "cpayne@joimail.com" <cpayne@joimail.com>
Arrgggh, just when I had everything dialed in, they canceled
the race. My inside connections tell me that someone in SNF
air ops whoosed out because of "liability", but who knows
for sure.
Anyhow, I'm left with a big bad boot and no butt to kick!
Heh, what's under YOUR cowl??
Craig Payne
Message 7
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--> Yak-List message posted by: "cpayne@joimail.com" <cpayne@joimail.com>
Yes, an O-ring helps a lot, been there, done that. Now I
have the vastly superior (and expensive) Horizon
tach...sooo, my old rig is available, with spare pins and
the like. Like Steve Dalton says, works well when it works.
The arguement for the digital tach is that it allows precise
settings and monitoring of RPM, great for tuning and
evaluating engine mods.
Craig Payne
Message 8
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--> Yak-List message posted by: DaBear <dabear@damned.org>
So I'll add my .02cents
I like the Horizon tach (off the p-lead). It tells me instantly if I
lost a mag, or failed to switch back to both. I've not lost a mag,
however, knowing that if it occurs, I'll know when it happens is worth
the extra cost and the fact that the readings move (up and down about 8rpm).
Al DeVere
payne@joimail.com wrote:
>--> Yak-List message posted by: "cpayne@joimail.com" <cpayne@joimail.com>
>
>Yes, an O-ring helps a lot, been there, done that. Now I
>have the vastly superior (and expensive) Horizon
>tach...sooo, my old rig is available, with spare pins and
>the like. Like Steve Dalton says, works well when it works.
>
>The arguement for the digital tach is that it allows precise
>settings and monitoring of RPM, great for tuning and
>evaluating engine mods.
>
>Craig Payne
>
>
>
>
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