Re: N275CH First Flight Q200 potential cap problems

Sickler, Terry L <terry.l.sickler@...>

Have you checked the routing of your fuel lines? Are they covered with
Fire Sleeve firewall forward? What type of pump are you using to provide
fuel transfer? Do you leave it on? Do you have a gascolator installed? I
will come by to see you, look over what you have and discuss this, if
you would like. You do realize that your motor has Venolia high
compression racing pistons I it... Right? What type of fuel are you
burning? ~T~

-----Original Message-----
From: Q-LIST@... [mailto:Q-LIST@...] On Behalf
Of Kevin Fortin
Sent: Monday, April 18, 2005 6:58 PM
To: Q-LIST@...
Subject: [Q-LIST] N275CH First Flight Q200 potential cap problems

Paul and gang,

Aside from the engine friction issue, Paul, you may have something here
with the fuel cap. Mine is not vented, but, after the fact, I found that
it was not tightened particularly well. After my "flight" (I use that
term loosely
here) I removed it by pulling up on it and only with moderate force. It
definitely could have leaked some "pressurized air" from the forward
facing vent through a less than sealed cap.

Are you (or anyone else) saying that the venturi effect of the air
rushing by the gas cap cover could be enough of a vacuum to overcome the
gravity feed of the system? If this venturi "vacuum" is enough, it
absolutely could be the source of my fuel problem. Let's face it, a
pressure "head" of a 1 1/2 feet or so doesn't take too much to overcome.

This "venturi" effect also explains why it would quit so soon after

I still have some issues with general engine heating, but that is a
separate problem. I will address that in a bit.

Thanks again to you and everyone. I REALLY want this one fixed before my
next aerial adventure. The challenge of flying is the reason we do it,
but that was a bit extreme.


-----Original Message-----
From: Fisher Paul A. [mailto:FisherPaulA@...]
Sent: Monday, April 18, 2005 5:48 AM
To: kfortin@...
Subject: RE: [Q-LIST] N275CH First Flight Q200

Congratulations on your first flight experience! One other thing that
has not been mentioned so far on the list is improper fuel venting. The
fuel vent typically points into the wind to positively pressurize the
fuel system. People have had the symptoms you described on take off
when they forget to put the fuel cap on because the tank doesn't have
sufficient pressure to keep the carburetor fed.

If you blow in your fuel vent (don't blow too hard!). After a few
seconds you should be able to still feel the pressure. If it all leaks
out, then you have a problem.

There are certainly way smarter people on the list than me on engines,
but personally I think your "friction" issue was a by product of your
problem, not the cause.

Just my $0.02!

Paul A. Fisher
Q-200, N17PF ~1160 hours
Taylor Ridge, Illinois, USA

-----Original Message-----
From: Q-LIST@... [mailto:Q-LIST@...] On Behalf
Of Kevin Fortin
Sent: Sunday, April 17, 2005 22:34
To: Q-LIST@...
Subject: [Q-LIST] N275CH First Flight Q200

Hey guys,

Got N275CH off the ground for the first time and got a few other firsts

First engine malfunction

First declared emergency

First time in the dirt (mud)

All this took 60 or so seconds.

The good news is only the airplane and the pilot got muddy.

In a nutshell, I did three fast taxis, felt about as good as you can for
your first shot into the air, then decided to give her a go. I lined up
on the runway, hit the throttle and the takeoff went as much per plan as
I could expect. Then after about 10 seconds and at about 100 feet the
engine acted like it ran out of gas. Oh shit. I put the nose down,
declared emergency, and started heading back to the runway which at this
point was obviously too short for the job at hand. Hoping for a plan B,
I hit the throttle, the engine revved up, then slowed again after a few
seconds. Seeing a connection there I kept pumping the throttle enough to
get her back in the air and around the pattern for my "first" landing.
Let's say the approach was not textbook but I got her back to the ground
without any bounces or anything I could complain about. I let it roll
out for a bit and then started braking. This is where the adrenaline of
the situation got the better of me. I braked too hard and it started
pulling a bit to the right. When I realized how hard I was braking I let
off of the brake (Johnson
bar) then ka-wam, I was headed for the other side of the runway. Damn, I
was just thinking I was going to pull the stunt off. Except for the
embarrassment, all was OK.

Yesterday, and at this point, I am thinking the engine had gotten hot
enough that fuel was boiling in the carb.

Today, to try to reproduce the problem, I tied the tail down and ran the
engine until the oil temp was 190 F, the previous day's takeoff oil
temp. This was when I noticed what may the real problem. After shutting
down, when I tried to move the prop, it moved with a lot of friction. I
quickly removed the cowl and the sparkplugs to take away the compression
"resistance" and found the engine was still hard to turn. Not knowing
what to do I figured lunch was in order. When I got back from lunch, and
the engine had cooled and it turned as light as I had known it before.

Any ideas of what might cause this "hot" friction? In any case I bet an
engine teardown is in my future.


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