Today's Message Index:
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1. 04:42 AM - Re: Fuel flow test (John Bolding)
2. 08:17 AM - Fuel caps - reducing syphonig (Victor Menkal)
3. 02:18 PM - Chat Room Reminder for Digesters (George Race)
4. 07:22 PM - Carb sync (Joe Spencer)
5. 07:44 PM - 912 oil thermostat (Joe Spencer)
Message 1
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| Subject: | Re: Fuel flow test |
Not only is it common practice, it's one of those things that MUST be
done before flight, also it is done at worst case scenario which is
minimum fuel quantity. After a flow check it's done for real with the
engine at Take Off power .
LO&SLO John
----- Original Message -----
From: Curt Thompson
To: zenith701801-list@matronics.com
Sent: Sunday, June 28, 2009 12:10 AM
Subject: Zenith701801-List: Fuel flow test
Is it common practice to do a fuel flow test before first flight? I
had an article on this somewhere but now I can't find it. Basically, it
entailed filling the tank with fuel, disconnecting the fuel line at the
engine, and measuring the fuel flow. I think the idea was to make sure
that the fuel system would supply fuel at the maximum consumption rate
of the engine (times some reserve factor). This is done with the
airframe tilted to represent max and min incline. This might highlight
a venting problem as well.
Curt
Plans building CH701, working on the controls kit now.
Message 2
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| Subject: | Fuel caps - reducing syphonig |
Found a nice set of fiberglass fairings to reduce drag and siphon
potential on the Kit Fox parts web page. Mark Townsend also showed
me a gentleman who had used rubber gaskets originally intended for
toilet installation to reduce drag around the skin - filler neck
opening.
Oh, and Im having so much fun with this I bought the 750 kit.
701 full kit (2008) 50% complete, meticulous work on the blocks
folks! (Pls see barnstormers for details).
Ill blame this move on Tommy Walker.
Victor Menkal
CH701 50% complete
CH750 just ordered
Whitehorse Yukon
Message 3
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| Subject: | Chat Room Reminder for Digesters |
Live Chat Room every Monday evening around 8:00 EDT
www.mykitairplane.com <http://www.mykitairplane.com/>
Click on the Chat Room link on the page.
Check out my new "Zenith Logo" Data Plate, really cool!
George
Do Not Archive
Message 4
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A while back I brought up the subject of unsteady carb sync and
different types of throttle systems. Since then I have installed a
MacFarlane Aviation 2into1 cable intended for our Rotaxes. After install
I put my oil tube on it and fired it up, after mechanically synching the
carbs, and the oil level stayed within 4" of one another from idle thru
about 3500 rpm. According to my reliable source, 4" of oil is equal to
about 1/4" of mercury, which is barely readable. That's the best mine
has ever done. I shut it down...that's good enough for me. Will check it
again after running it a while. BTW, I shortened the 6 foot cables to
the exact same length and snaked them around in the engine compartment
as necessary...I don't know if the same length is really necessary for
proper synch, but wasn't taking any chances at cutting a $150 cable too
short.
The downside is I am back to the cursed springs...maybe I can live with
it. I may have to...I have tried the plans setup with springs, solid
rods without springs, and Cessna/Piper type push/pull cables with no
springs...
Joe
Message 5
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| Subject: | 912 oil thermostat |
There was a thread here a few weeks ago about the 180 degree oil
thermostat on the 912...there have been reports on the 180 Permacool not
bringing the temp up in cold temps(140F), and bypassing enough oil to
cause high temps in hot weather(in the yellow), thus my reason for not
having installed the one sitting on my shelf for the last 6 months or
so.(Somebody asked what my problem was with the thermostat...well, there
you go). Anyway there is a basic explanation for why this may be
occuring at www.thermostasis.com . Look at Rotax 912 installation FAQ,
bearing in my mind that these folks are selling thermostats. I found
more detailed info at http://www.wingsforum.com/viewtopic.php?t=18036,
the info coming from the same thermostasis source...has anybody had
experience with these thermostats and could you pass it along
Thx Joe
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