Today's Message Index:
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1. 07:01 AM - Re: Pre-Purchase Inspection, Firestar (racerjerry)
2. 01:00 PM - Re: Rotax 447 RPM Varies (t41pilot)
3. 03:38 PM - Re: Rotax 447 RPM Varies (Jack B. Hart)
4. 06:42 PM - Storm Aftermath (Dennis Thate)
5. 07:59 PM - Re: Storm Aftermath (Brad Nation)
6. 09:22 PM - Re: Storm Aftermath (Dennis Thate)
7. 09:30 PM - Re: Storm Aftermath (Dennis Thate)
Message 1
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| Subject: | Re: Pre-Purchase Inspection, Firestar |
Can I expect to fly it as I would the Taylorcraft BC12D I used to own? ABSOLUTELY
NOT.
The Firestar is a great flying airplane, but because it has a high thrust line,
is very light, has low inertia, and is quite draggy, when you get off the power,
it slows down immediately. You must be ready to get that stick forward to
maintain airspeed when coming off the throttle.
If you want to live to age 58, do yourself a large favor and find a guy to give
you an hour or two of dual instruction in a 2-place Kolb Mark III. Its the best
money you will ever spend.
--------
Jerry King
Read this topic online here:
http://forums.matronics.com/viewtopic.php?p=403201#403201
Message 2
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| Subject: | Re: Rotax 447 RPM Varies |
I have a 447 with about 30 hours on it and as undoctor points out, the rpm will
change as the pitch of the aircraft changes with a given throttle setting. Pitch
changes the load on the engine so pitch up equals more load and less indicated
rpm and vice versa. My rpm changes are 200 or 300 rpm in either direction
as pitch changes. not 1000 as you are describing. So, the important thing here
is whether your problem occurs at a constant altitude or not and just around
your cruise setting or across the entire throttle range. If you are maintaining
a steady altitude, then you do have a problem. If it occurs just in the 4
to 5 grand range and nowhere else, then the midrange circuit in the carb needs
looking at. Check for worn needle and that the clip is still fitting snuggly
in the grooves. Make sure the rubber o ring on top of the clip is secure. Make
sure your throttle cable is snug and properly adjusted at the carb inlet. Pulse
line for fuel pump should be as short as possible and stiff as possible.
Pump has to lift fuel quite a ways on a firefly. A partially plugged fuel filter
will cause engine surges too. I've read that paper style fuel filters are
not recommended when using auto gas because of the alcohol. Not sure how true
that is but for a couple of bucks I changed mine out to a different type just
for peace of mind. So far so good on my engine. I'm presently using 89 octane
auto gas. I manage my pitch during flight with a vertical deviation indicator
of my own design that works quite well. I find that I use it alot to help maintain
a constant altitude which also helps maintain a steady EGT temp.
--------
Gregg Kaat
2011 Firefly
Read this topic online here:
http://forums.matronics.com/viewtopic.php?p=403226#403226
Message 3
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| Subject: | Re: Rotax 447 RPM Varies |
From: WhiskeyVictor36@aol.com
>Problem with Rotax 447 not holding steady RPM.
>
>After climbing to altitude and reducing the RPM to my cruise setting of
>5,000, the RPM slowly decreases to about 4,000. I bump the throttle lever
>and get it back up to 5,000, and then it continues on up to 5,500 or even to
>6,000 RPM. I cannot seem to get it to stay at 5,000 RPM.
>
Bill,
I had similar problems with both the 447 and the Victor 1+. The Victor did
better than the 447 at holding a steady rpm but had they both had similar
problems of not holding steady EGT's. It drove me nuts and that is why I
went to an adjustable air/fuel control on the Victor. But not all the
problems went away.
I removed the Bing and looked at the barrel and plunger/needle assembly and
noticed an odd wear mark inside the barrel bore. It looked like the plunger
and needle, return spring, and the control cable assembly were letting the
plunger and needle dance or resonate inside the barrel bore and the main
jet. As an experiment, I found another spring that I could slip inside the
ordinal spring and ran the two springs. Much improvement. I called the
Bing guy and found out that they produce three different strength springs. I
ordered the strongest spring, installed it and all my rpm and EGT variations
disappeared.
I hope this helps.
Jack B. Hart FF004
Winchester, Indiana
Message 4
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Most likely a derecho caused this, enhanced by downburst clusters embedded inside
the storm and some of the loudest thunder I've ever heard. Only in Kolb can
you get this perspective on a storms aftermath.
A derecho is a widespread, long-lived, straight-line wind storm that is associated
with a land-based, fast-moving band of severe thunderstorms.
Rainbow Country
--------
Both optimists and pessimists contribute to our society. The optimist invents
the airplane and the pessimist the parachute. ~Gil Stern
Read this topic online here:
http://forums.matronics.com/viewtopic.php?p=403250#403250
Attachments:
http://forums.matronics.com//files/dscn5001_210.jpg
http://forums.matronics.com//files/dscn4888_176.jpg
http://forums.matronics.com//files/rainbow_country_180.jpg
http://forums.matronics.com//files/dscn4955_138.jpg
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Message 5
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| Subject: | Re: Storm Aftermath |
I really don't want to hear about let alone see photos of too much water. We are
in the middle of a drought here in the New Mexico desert.
Other than that the rainbow was rather nice.
Is drencho a meteorological term? :-)
Don't archive.
Brad Nation
On Jun 23, 2013, at 19:42 , "Dennis Thate" <retroman@frontier.com> wrote:
>
> Most likely a derecho caused this, enhanced by downburst clusters embedded inside
the storm and some of the loudest thunder I've ever heard. Only in Kolb can
you get this perspective on a storms aftermath.
> A derecho is a widespread, long-lived, straight-line wind storm that is associated
with a land-based, fast-moving band of severe thunderstorms.
>
> Rainbow Country
>
> --------
> Both optimists and pessimists contribute to our society. The optimist invents
the airplane and the pessimist the parachute. ~Gil Stern
>
>
>
>
> Read this topic online here:
>
> http://forums.matronics.com/viewtopic.php?p=403250#403250
>
>
>
>
> Attachments:
>
> http://forums.matronics.com//files/dscn5001_210.jpg
> http://forums.matronics.com//files/dscn4888_176.jpg
> http://forums.matronics.com//files/rainbow_country_180.jpg
> http://forums.matronics.com//files/dscn4955_138.jpg
> http://forums.matronics.com//files/flooding_281.jpg
>
>
>
>
>
Message 6
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| Subject: | Re: Storm Aftermath |
Hard to please some on this forum......try this,
the the perigee-syzygy moon.
--------
Both optimists and pessimists contribute to our society. The optimist invents
the airplane and the pessimist the parachute. ~Gil Stern
Read this topic online here:
http://forums.matronics.com/viewtopic.php?p=403262#403262
Attachments:
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Message 7
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| Subject: | Re: Storm Aftermath |
Hard to please some on this forum......try this,
the the perigee-syzygy moon, or tonight's 'Super Moon' !
--------
Both optimists and pessimists contribute to our society. The optimist invents
the airplane and the pessimist the parachute. ~Gil Stern
Read this topic online here:
http://forums.matronics.com/viewtopic.php?p=403264#403264
Attachments:
http://forums.matronics.com//files/dscn5060_458.jpg
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