Today's Message Index:
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1. 05:58 PM - Re: FireStar II flying the US- Mexican border (Bill Vincent)
2. 07:58 PM - Re: Firestar II HKS Conversion (Dave Bigelow)
3. 09:25 PM - Re: Re: Firestar II HKS Conversion (Richard & Martha Neilsen)
Message 1
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| Subject: | Re: FireStar II flying the US- Mexican border |
--> Kolb-List message posted by: "Bill Vincent" <emailbill@chartermi.net>
Hi Will
The video was great! I am curious what is the model/make of the camera you
used. Was it a digital camera or a digital video camera? Sorry if you
already answered this question ... been having computer problems.
Thank you
Bill Vincent
Firestar II
Upper Peninsula of Michigan
Do Not Archive
----- Original Message -----
From: "Guillermo Uribe" <WillUribe@aol.com>
Sent: Monday, August 07, 2006 9:08 PM
Subject: Kolb-List: FireStar II flying the US- Mexican border
.
> Be advised the file is 4.92 MB so dialups need not view it.
> http://members.aol.com/ELPEAA125/border.WMV
>
> Regards,
> Will Uribe
Message 2
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| Subject: | Re: Firestar II HKS Conversion |
--> Kolb-List message posted by: "Dave Bigelow" <up_country@hotmail.com>
Just found out that John Hauck is on his way to PA. Here's the question: Does
the Rotax 912 conversion on the Mark III involve a higher thrust line than the
original Rotax 582 design? If so, how many inches, and was the pitch trim change
appreciable?
The HKS Firestar conversion will involve a higher thrust line than that of the
503.
--------
Dave Bigelow
Kamuela, Hawaii
FS2, Rotax 503 DCDI
Read this topic online here:
http://forums.matronics.com/viewtopic.php?p=53998#53998
Message 3
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| Subject: | Re: Firestar II HKS Conversion |
--> Kolb-List message posted by: "Richard & Martha Neilsen" <NeilsenRM@comcast.net>
Dave
When you put a different engine on a Kolb you will want to mount it so that
it has a minimum amount of clearance between the prop tips and the fuselage
tube. When I first mounted a direct drive VW on my MKIIIc I had a fairly
high thrust line but because it was direct drive turning the prop at a
extremely high prop RPM (3200-3600) it didn't produce enough thrust to be a
problem. When I later switched the engine to a reduction drive VW I used the
same engine mount but the reduction drive placed the prop 5 inches higher.
With the higher prop and the increased thrust the pitch trim got so bad that
I had to drastically reduce the forward CG limits. I would literally run out
of up elevator with high thrust levels at lower airspeeds. A missed
approach with its lower airspeed, hi thrust and flaps wow. A go around would
involve raising the flaps and gaining airspeed before climbing. Also I
always had to add power slowly on the ground. A basis for comparison is that
most engines on MKIIIs are set up to have around 2-3 inches of prop
clearance. On my first redrive engine I had 7 inches of clearance with a 72"
prop. My new redrive VW engine has a new lowered engine mount that brings
the clearance down to 2 inches with a 72" prop.
In summary the lower the thrust line the better these Kolb fly. The HKS on a
Firestar II could cause you problems with a higher thrust line. You say it
is higher. How much higher? An inch or two may not be too bad but if that
engine produces allot more thrust than a 503 you may want to be careful.
When you make these kinds of changes you become the designer and things like
CG ranges may be completely different.
Again this information is worth just what you paid for it.
Rick Neilsen
Redrive VW powered MKIIIc
----- Original Message -----
From: "Dave Bigelow" <up_country@hotmail.com>
Sent: Thursday, August 10, 2006 10:57 PM
Subject: Kolb-List: Re: Firestar II HKS Conversion
> --> Kolb-List message posted by: "Dave Bigelow" <up_country@hotmail.com>
>
> Just found out that John Hauck is on his way to PA. Here's the question:
> Does the Rotax 912 conversion on the Mark III involve a higher thrust line
> than the original Rotax 582 design? If so, how many inches, and was the
> pitch trim change appreciable?
>
> The HKS Firestar conversion will involve a higher thrust line than that of
> the 503.
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