Today's Message Index:
----------------------
1. 08:26 AM - Monument Valley (Larry Bourne)
2. 09:12 AM - Re: Gas & Tach (DAquaNut@aol.com)
3. 10:59 AM - Firestar cross-country (John Jung)
4. 11:09 AM - Density-altitude (John Jung)
5. 01:17 PM - Re: Density-altitude (Larry Bourne)
6. 01:59 PM - Re: Firestar cross-country (Michael Sharp)
7. 05:00 PM - Re: Gas & Tach (kfackler)
8. 06:37 PM - Cross Country cruise RPM (Bill Vincent)
9. 08:45 PM - Re: Cross Country cruise RPM (John Jung)
Message 1
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--> Kolb-List message posted by: "Larry Bourne" <biglar@gogittum.com>
Where is everybody ?? I know the whole Kolb List wasn't at MV. :-)
I think John W. told me he'd logged 26 people by Saturday afternoon. He and several
others - John H., Boyd Young and Jim Hefner - are up in Canyonlands, near Moab,
Utah now, and from there will be going to the Alvord Desert in Southern Oregon
to meet Larry Cottrell, so we won't be hearing from them for a while. I didn't
do a real count of the planes there, but for sure there were a Mooney, Dave
Rains' Cessna C175, and about 12 - 15 Kolbs. It was quite a flight line. A
very nice group, and it was relaxing, but intense. A lot of activity in a short
time. Flying started nearly at dawn for some, while others of us eased into
breakfast at the excellent restaurant at Goulding's before taking to the air.
By about 10:00 AM the wind came up, the sun got hot, and everyone hid under
the awnings of the RV's, and under airplane wings............and put on their
hip boots. Late in the afternoon, the wind pretty much died down, and flying
started again. This time, more flights were made up to the Mexican Hat area
and the horseshoes of the San Juan River, about 20 miles north of MV. Previously,
most flights went east, over Monument Valley. The 2 areas are a world apart
in scenery, and both spectacular. I arrived at MV at around 11:00 AM Friday,
and was surprised to see that many folks were already there. It got an early
start this year, but ended a bit early, too, with most leaving Sunday, instead
of Monday, as last year. What a great way to spend a weekend. (All that
in only a weekend ?? Amazing ! ! ! ) In a while, I'll post some pictures.......possibly
even today. :-) It was quite a shock yesterday, coming from ~80
deg. weather there, to 111 deg here in the desert. Oh well..........back to
reality today. Big Lar. Do not Archive.
Larry Bourne
Palm Springs, CA
Building Kolb Mk III
N78LB Vamoose
www.gogittum.com
Message 2
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--> Kolb-List message posted by: DAquaNut@aol.com
Group:
I would like to have an inexpensive way to verify that my tach is
reading correctly when I go to break in my 447. I have the tiny tach, but I
would like to have a backup. Any suggestions? Also, I dont want to start a gas
war here Buuuuutttttt !!!!!!!! Are there any particular brands of gas I
should stay away from. Any proven brands with a good record? SeemsI saw where
someone on the list preferred Amoco. I cant find that brand in south Texas.
I
just want to feed my rotax good stuff from the start.
Ed in (Hou Beautiful flying weather, but just not quite ready
yet)
Message 3
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| Subject: | Firestar cross-country |
--> Kolb-List message posted by: John Jung <jrjungjr@yahoo.com>
Group,
This weekend, I solved one of my problems with cross countries and got
a good test on the other:
About a year ago, I put a new seat in my Firestar because I got very
uncomfortable after 1.5 to 2 hours. The new seat has two inches of
memory foam. Other than that it is just like my original seat. Now, I
can fly at least 6 hours in comfort. Problem solved.
The other problem that I've had in the past, was having to land
somewhere, even before needing gas, to relieve myself. In parts of
Arizona there are no places to land safely, and diverting to an
airstrip could cause me to not have enough gas to make it to an airport
that sells gas. I didn't think it would be possible to use a relief
bottle in-flight. But I found myself about a hour from my next stop,
with no place for a landing, and needing to go bad. I had a Gatorade
bottle mostly full with water. My Firestar is fully enclosed so I
poured the water out one of the vents. Then I used the bottle. Not only
is it possible, it wasn't all that difficult. Sure wish that I knew
that years ago.
John Jung
Firestar II N6163J
Message 4
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| Subject: | Density-altitude |
--> Kolb-List message posted by: John Jung <jrjungjr@yahoo.com>
Group,
Yesterday, I returned from Monument Valley in my Firestar. It was 640
miles round trip, plus some local flying while there.
On the trip, I learned that density-altitude really does matter.
It caused a surprising loss of performance and increased fuel burn.
I originally learned about density-altitude while working on my private
in a Cessna 150. The runway altitude was 800 feet, it was in Wisconsin
where it is easy to avoid flying in hot temperatures, and the runway
was long enough for jet traffic. So, it was "book learning" and didn't
really seem important. Also, a Kolb has so much extra performance that
it is easy to not consider density-altitude. This weekend, we had 90
degree temperatures at a 5,200 foot elevating runway, giving a
density-altitude of over 8,000 feet. I'm used to flying from 1,200 feet
elevation. I also had to cruise at 8,000 feet in 70 degree temperatures
just to not fly close to the ground. That gave me about 10,500 feet
density altitude. I also took off from a 6,000 foot runway at 90
degrees, giving me about 9,500 feet density altitude. In addition to
that, I was carrying extra gas and camping gear, so I was heavier than
normal. The biggest difference was the loss of performance. Not a
problem if it is expected and planned for. But I kept being surprised
at how long it took to get off a runway and climb out. Fuel burn was
about a half gallon per hour higher also. This was probably because I
was not jetted for altitude. But contributing to that was the fact that
I was flying about 5 mph faster than usual because of airspeed error
caused by density-altitude. Density-altitude can also change the
feeling of a landing. Stall speeds are increased and airspeed error
compensates so that indicated airspeed stays the same. But landings
look and really are faster, making me feel like pulling off power too
soon. I didn't, I trusted my airspeed, but I did have to resist the
feeling of wanting to slow down. It was like doing a downwind landing.
John Jung
Firestar II 503 DCDI
Message 5
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| Subject: | Re: Density-altitude |
--> Kolb-List message posted by: "Larry Bourne" <biglar@gogittum.com>
Good stuff, John. How was the trip home ?? Several of us discussed what
you were likely to run into, and I'd be curious as to what the flight really
was like. I would guess that you hit a lot of wind, so how did your fuel
capacity work out ?? Lar. Do not
Archive.
Larry Bourne
Palm Springs, CA
Building Kolb Mk III
N78LB Vamoose
www.gogittum.com
----- Original Message -----
From: "John Jung" <jrjungjr@yahoo.com>
Subject: Kolb-List: Density-altitude
> --> Kolb-List message posted by: John Jung <jrjungjr@yahoo.com>
>
> Group,
>
> Yesterday, I returned from Monument Valley in my Firestar. It was 640
> miles round trip, plus some local flying while there.
>
> On the trip, I learned that density-altitude really does matter.
>
> It caused a surprising loss of performance and increased fuel burn.
> I originally learned about density-altitude while working on my private
> in a Cessna 150. The runway altitude was
Message 6
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| Subject: | Re: Firestar cross-country |
--> Kolb-List message posted by: Michael Sharp <kolbdriver@mlsharp.com>
John,
Was that 2" of Memory Foam on the seat and back or just seat??
As for the other it reminds me of an old joke; "man that waters cold. And it's
DEEP too!"... lol
please
Do Not Archive!!!
Mike
John Jung <jrjungjr@yahoo.com> wrote:
--> Kolb-List message posted by: John Jung
Group,
This weekend, I solved one of my problems with cross countries and got
a good test on the other:
About a year ago, I put a new seat in my Firestar because I got very
uncomfortable after 1.5 to 2 hours. The new seat has two inches of
memory foam. Other than that it is just like my original seat. Now, I
can fly at least 6 hours in comfort. Problem solved.
The other problem that I've had in the past, was having to land
somewhere, even before needing gas, to relieve myself. In parts of
Arizona there are no places to land safely, and diverting to an
airstrip could cause me to not have enough gas to make it to an airport
that sells gas. I didn't think it would be possible to use a relief
bottle in-flight. But I found myself about a hour from my next stop,
with no place for a landing, and needing to go bad. I had a Gatorade
bottle mostly full with water. My Firestar is fully enclosed so I
poured the water out one of the vents. Then I used the bottle. Not only
is it possible, it wasn't all that difficult. Sure wish that I knew
that years ago.
John Jung
Firestar II N6163J
Message 7
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--> Kolb-List message posted by: "kfackler" <kfackler@ameritech.net>
Can't help you with the tach issue but as for gas I've been told by a
certified Rotax repairman to never run gas with any component of alcohol.
His advice was to rely on any of the three or four major brands, i.e.,
Exxon, Shell, etc. Personally, I religiously use Mobil, both in my car and
in my Rotax. My .02 worth.
-Ken Fackler
Kolb Mark II / A722KWF
Rochester MI
do not archive
----- Original Message -----
From: <DAquaNut@aol.com>
Subject: Re: Kolb-List: Gas & Tach
> --> Kolb-List message posted by: DAquaNut@aol.com
>
>
> Group:
>
> I would like to have an inexpensive way to verify that my tach is
> reading correctly when I go to break in my 447. I have the tiny tach, but
I
> would like to have a backup. Any suggestions? Also, I dont want to start
a gas
> war here Buuuuutttttt !!!!!!!! Are there any particular brands of gas
I
> should stay away from. Any proven brands with a good record? SeemsI saw
where
> someone on the list preferred Amoco. I cant find that brand in south
Texas. I
> just want to feed my rotax good stuff from the start.
>
> Ed in (Hou Beautiful flying weather, but just not quite
ready
> yet)
>
>
Message 8
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| Subject: | Cross Country cruise RPM |
--> Kolb-List message posted by: "Bill Vincent" <emailbill@chartermi.net>
Hi John Jung
I am curious what RPM do you cruise at when flying cross country and what airspeed
do you get from the RPM.
Thanks in advance.
William Vincent
Firestar II 503 DCDI
Upper Peninsula of Michigan
Do Not Archive
Message 9
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| Subject: | Re: Cross Country cruise RPM |
--> Kolb-List message posted by: John Jung <jrjungjr@yahoo.com>
Bill and Group,
I cruised at 5,800 on this trip. That gave me an indicated airspeed up
to 60-65 mph, and a true airspeed of 64-69. The average altitude on
this trip was about 7,000 and density altitude went as high as 10,500.
A lot of the state was setting record high temperatures on the day of
my return. So the numbers are not really normal.
John Jung
Firestar II 503 DCDI
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