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John Hauck
Joined: 09 Jan 2006
Posts: 4639
Location: Titus, Alabama (hauck's holler)
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 Posted: Thu Mar 23, 2006 5:02 pm Post subject: Spring Maintenance/Stock Performance |
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Hi Gang:
Got back into the air today a couple times. First flights since the
first of January. Long dry spell.
Tried to do a better fit on the STE exhaust system yesterday. Today I
got a test flight in for that. Then I got the old steam gauge
tachometer calibrated. This is a complicated job because the
instrument panel has to be dropped to get a jeweler's screw driven in
that tiny hole in the back to turn the pot and reset the needle. I
think the last time I did that was two years ago. Another hour to
change oil and filter, plus take the oil tank apart and wash
thoroughly with gasoline. Still had enough time for another test
flight.
With all this talk of VG's, I decided while I was up boring holes in
the sky to see what my old MKIII was doing in the way for flight
performance. This test was conducted with 15 gal (90 lbs of fuel), a
fat MKIII, me, and on a beautiful cool calm afternoon.
At 3,000 feet MSL, power at idle, she started mushing at 40 mph
indicated. No break.
At 3,000 feet MSL, power at idle, full flaps (40 deg), she started
mushing at 32 to 33 mph indicated.
Landing on grass, full flaps, she stalled onto the ground as the
needle was coming through 30 mph indicated.
Making a full stall 3 pt landing in ground effect my MKIII has a nice
sharp break with full flaps.
However, at 3000 feet, at idle power I can put her in a 40 to 50 mph
mush at 2000 fpm rate of decent with no tendancy to lose roll or pitch
control. Think it and it is flying again.
It climbs full power as slow as 22 mph indicated. Course it is
porpoising because of the high thrust line, but still climbing 1500
fpm. The airspeed fluctuates from 22 to 35 mph.
Now.........what is amazing about this is it is a standard MKIII with
no VG's.
The above performance figures are the primary reason I have not stuck
them on my MKIII. As far as slow flight, never flew any model Kolb
that did not fly well in slow flight, even the FF and the SS. Homer
designed his airplanes primarily to be slow fliers. They do that
well. Far better than being fast airplanes. Mine is comfortable at
85 mph cruise no matter what engine I have had on it from the 582, to
the 912UL to the 912ULS.
I have nothing against VG's. If they help you and your Kolb. Great!
Take care,
john h
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_________________
John Hauck
MKIII/912ULS
hauck's holler
Titus, Alabama |
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pj.ladd(at)btinternet.com
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| Posted: Fri Mar 24, 2006 1:39 am Post subject: Spring Maintenance/Stock Performance |
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It climbs full power as slow as 22 mph indicated..... The airspeed
fluctuates from 22 to 35 mph.>>
Hi John,
Very much `indicated`. I guess your ASI must be blanketed by the nose high
attitude and not reading accurately. I don`t think many planes would stay
in the air at 22 mph.
No wonder you don`t want VG`s. You have your own personal skyhook.
Cheers
Pat
do not archive
--
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John Hauck
Joined: 09 Jan 2006
Posts: 4639
Location: Titus, Alabama (hauck's holler)
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| Posted: Fri Mar 24, 2006 6:28 am Post subject: Spring Maintenance/Stock Performance |
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| Very much `indicated`.
| No wonder you don`t want VG`s.
| Pat
I wasn't flying with GPS, unfortunately. Next time I fly, I will try
to remember to put it in the airplane. It will tell me what I am
moving across the ground, but not accurate speed at the angle I am
flying. Feels like the space shuttle. This, of course, is with the
stick in the full aft position, back to the stop.
Gathering flight data in a Kolb, especially touch down speeds, is a
very unexacting science.
The nice thing about Kolbs though, is it doesn't have to be exacting.
It can be fun.
john h
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_________________
John Hauck
MKIII/912ULS
hauck's holler
Titus, Alabama |
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