Today's Message Index:
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0. 12:38 AM - PLEASE READ - Matronics Email List 2017 Fund Raiser During November! (Matt Dralle)
1. 04:42 PM - Re: [Non-DoD Source] Yak55M Tachometer (Bitterlich, Mark G CIV NAVAIR, WD)
2. 04:43 PM - Re: Yak 52 for sale (Chris Ober)
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| Subject: | PLEASE READ - Matronics Email List 2017 Fund Raiser During November! |
Dear Listers,
Each November I hold a PBS-like fund raiser to support the continued operation
and upgrade of the Email List and Fourm Services at Matronics. It's solely through
the Contributions of List members (you) that these Matronics Lists are possible.
You have probably noticed that there are no banner ads or pop-up windows on any of the Matronics Lists or related web sites such as the Forums site http://forums.matronics.com , Wiki site http://wiki.matronics.com , or other related pages such as the List Search Engine http://www.matronics.com/search , List Browse http://www.matronics.com/listbrowse , etc. This is because I believe in a List experience that is completely about the sport we all enjoy - namely Airplanes and not about annoying advertisements.
During the month of November I will be sending out List messages every couple of
days reminding everyone that the Fund Raiser is underway. I ask for your patience
and understanding during the Fund Raiser and throughout these regular messages.
The Fund Raiser is only financial support mechanism I have to pay all
of the bills associated with running these lists. YOUR personal Contribution
counts!
This year we have a really HUGE and TERRIFIC line up of free gifts to go along
with the various Contribution levels. In fact, there are 9 great gifts to choose
from! There's something for everyone, to be sure.
Please make your List Contribution using any one of three secure methods including
using a Credit Card, PayPal, or by Personal Check. All three methods afford
you the opportunity to select one of this year's free gifts with a qualifying
Contribution amount!!
To make your Contribution, please visit the secure web site:
http://www.matronics.com/contribution
I would like to thank everyone in advance for their generous financial AND moral
support over the years!
Thank you!
Matt Dralle
Matronics Email List Administrator
RV-4/RV-6/RV-8 Builder/Rebuilder/Pilot
Message 1
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| Subject: | Yak55M Tachometer |
The tach in the Russian airplanes uses a 3 phase AC system. The actions of your
tach indicator point to one of the phases being intermittent or missing entirely.
The typical place this fails is in the solder joint of the tach generator
cannon plug itself. Not always mind you, but it is a good place to start
looking. Lots of ways to check this. You can start by checking the wires
with an ohm-meter by removing both the tach gen and tach indicator plugs and checking
continuity.
If the wiring checks good... and you are certain... absolutely certain.... then
the next most likely thing is the tach generator itself. Best to borrow one,
and give it a try!
Failing that, you can use a AC volt-meter and pull the plug off the indicator and
with the engine running check between one phase and another to try to see if
one is missing. Like pin A to B, then A to C, and then B to C kind of thing.
Voltages between phases should all be identical. Or close to it.
Lastly, it is actually possible to remove the tach gen, then CAREFULLY put the
end into an electric drill and spin it to create the voltages that need to be
checked. This is a really Rube Goldberg creation mind you, but I've done it once
or twice.
Of course doing all of this with no spare parts to plop in and check makes the
task much much more difficult. The best thing in the world is to just borrow
a few parts to figure this out, but you can fervently hope it is just a bad solder
joint, which it very well might be.
Bottom line, I've never seen an indicator fail. I've heard of one failing, but
I've never seen it. On the other hand, I have seen many cases of failed tach
generators, and failed wiring.
Mark
-----Original Message-----
From: owner-yak-list-server@matronics.com [mailto:owner-yak-list-server@matronics.com] On Behalf Of Dan Caldwell
Sent: Thursday, October 26, 2017 7:49 PM
Subject: [Non-DoD Source] Yak-List: Yak55M Tachometer
The past two flights my tach has run backward after start. Each time I shut the
engine down and restarted it which seemed to get the tach running normally.
Today it did the same thing except during flight it went to zero and no longer
responds to the engine.
I have researched it in the Matronics archives and suspect that one or more of
the pin connectors is not making contact.
The cannon plug seems to be fine. Is there a way to check continuity or check that
the tach hasn't just failed?
Sent from my iPad
Message 2
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| Subject: | Re: Yak 52 for sale |
I=99m open to offers. Here is a cockpit shot.
Chris Ober
Sent from my iPhone
On Sep 22, 2017, at 3:00 PM, JON <jblake207@comcast.net> wrote:
Beautiful airplane... love that paint scheme.
From: "Chris Ober" <christopherjober@gmail.com>
Sent: Friday, September 22, 2017 2:24:44 PM
Subject: Re: Yak-List: Yak 52 for sale
[image/jpeg:image1.jpeg]
[image/jpeg:image2.jpeg]
[image/jpeg:image3.jpeg]
Chris Ober
3092080323
Sent from my iPhone
On Sep 21, 2017, at 7:23 AM, Chris Ober <christopherjober@gmail.com> wrote:
Unfortunately I'm going to be listing my Yak-52 for sale. 1992 very nice exa
mple, needs nothing, a great running plane. Has a mig center council and a s
moke system. Dual radios, new transponder, MT 3 blade prop, full canopy cove
r, comes with 2 chutes. I can get you any other details you need. Please pm m
e for any other info including price. It's a beautiful plane. It will come w
ith a fresh annual.
Chris Ober
3092080323
<image1.jpeg>
<image2.jpeg>
<image3.jpeg>
Sent from my iPhone
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