Today's Message Index:
----------------------
1. 05:53 AM - Re: 180 turn back to runway (first flight) (Thom Riddle)
2. 06:59 AM - Re: 180 turn back to runway (first flight) (jimhefner)
3. 12:34 PM - trim (Larry Cottrell)
4. 01:19 PM - Re: trim (robert bean)
5. 02:00 PM - Re: trim (Eugene Zimmerman)
6. 03:46 PM - Re: trim (Larry Cottrell)
7. 04:02 PM - Re: trim (John Hauck)
8. 06:57 PM - Re: Landing light wagger (ElleryWeld@aol.com)
9. 07:33 PM - Re: trim (Larry Cottrell)
10. 07:46 PM - Primer bulb bypass (Richard Girard)
Message 1
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| Subject: | Re: 180 turn back to runway (first flight) |
... Just thought I'd mention another factor - after the 180 turn is
completed. David...
David,
Good additional information on the tailwind factor. To quantify a bit
the rule of thumb for take-off distance adjustment for headwinds and
tailwinds is total take-off distance decreases by about 7% for each 10
knots of headwind and increases by 5% for each 2 knots of tailwind. So
the tail wind has a bigger impact than headwind. I'm not sure if the
effect is the same on landing distance but suspect they are in the same
ball park.
I personally don't do tail wind landings or take-offs even with plenty
of runway unless it can't be avoided because it doesn't do the airplane
landing gear and tires any favors by adding the wind to touch down
ground speed.
Thom in Buffalo
do not archive
Message 2
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| Subject: | Re: 180 turn back to runway (first flight) |
--> Kolb-List message posted by: "jimhefner" <hefner_jim@msn.com>
I don't think the tailwind factor is much of a problem unless it's blowing pretty
good... 10-15 mph. The Firefly landing stall speed is so low that adding another
10-15 to that isn't a big problem for the plane. I use one notch less
flaperon and carry a little power to ensure ASI doesn't drop below 40 during the
flare. With the wind the sink rate is increased. I don't make a habit of
doing downwind landings but would not hesitate to do one if it gets quiet with
enough altitude to make it back.
--------
Jim Hefner
Tucson, AZ
Firefly #022 447, 2 blade IVO, BRS-750
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Read this topic online here:
http://forums.matronics.com/viewtopic.php?p=64804#64804
Message 3
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Hi,
need some help. My firestar before the accident had a trim tab on the
elevator, which I haven't found yet in all the mess, and would fly hands
off. Of course there have been many changes in the repair, and my memory
is 62 years old so not the best. It is possible that I have forgotten
the way my motor was mounted. Number of washers under the motor? I
currently have two under each corner.
The problem that I am having is that I have to use a fair amount of back
pressure on the stick to maintain level flight. Roger told me to adjust
the ailerons up to level it out. Perhaps I just haven't done it enough,
but the problem doesn't seem to be abating. I have them noticeably
reflexed up but it still wants to dive to the ground. I am going to go
search again for the tab. My question is the amount and number of
washers under the motor. (plans are a bit vague) Perhaps the angle of
the motor is forcing it down.
A preliminary check (won't know until I can get level flight
established) is that the prop does indeed give me more speed. As you
know I put 800x6 tires on Dart, expecting that the increased size would
slow me down a bit, but I am so far indicating that it is going faster
than it was before. I need to stabilize and then do some more tests.
Larry, Ore
do not archive
Message 4
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Larry, both items you mentioned would add to the nose down.
-more thrust from the prop
-bigger tires
I would forget the washers and stick on a new elevator tab,
or, if you are really ambitious, change the horizontal stab angle.
BB
On 30, Sep 2006, at 3:33 PM, Larry Cottrell wrote:
> Hi,
> - need some help. My firestar before the accident had a trim tab on
> the elevator, which I haven't found yet in all the mess, and would fly
> hands off. Of course there have been many changes in the repair, and
> my memory is 62 years old so not the best. It is possible that I have
> forgotten the way my motor was mounted. Number of washers under the
> motor? I currently have two under each corner.
> -
> The problem that I am having is that I have to use a fair amount of
> back pressure on the stick to maintain level flight. Roger told me to
> adjust the ailerons up to level it out. Perhaps I just haven't done it
> enough, but the problem doesn't seem to be abating.- I have them
> noticeably reflexed up but it still wants to dive to the ground. I am
> going to go search again for the tab. My question is the amount and
> number of washers under the motor. (plans are a bit vague) Perhaps the
> angle of the motor is forcing it down.
> -
> A preliminary check (won't know until I can get level flight
> established) is that the prop does indeed give me more speed. As you
> know I put 800x6 tires on Dart, expecting that the increased size
> would slow me down a bit, but I am so far indicating that it is going
> faster than it was before. I need to stabilize and then do some more
> tests.
> Larry, Ore
> do not archive
>
>
Message 5
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--> Kolb-List message posted by: Eugene Zimmerman <etzim62@earthlink.net>
Hi Larry,
There is one more thing that affects pitch trim besides stabilizer
incidence and aileron reflex and that is the shape and size of the
wind screen. Have you changed it from your previous setup?
If you made it larger it will have a greater nose down tendency that
you will need to overcome.
Most times corrections can be made with just the stabilizer and
aileron adjustments but also check to be sure that your CG has not
move forward during your rebuild.
Gene,
On Sep 30, 2006, at 3:33 PM, Larry Cottrell wrote:
> Hi,
> need some help. My firestar before the accident had a trim tab on
> the elevator, which I haven't found yet in all the mess, and would
> fly hands off. Of course there have been many changes in the
> repair, and my memory is 62 years old so not the best. It is
> possible that I have forgotten the way my motor was mounted. Number
> of washers under the motor? I currently have two under each corner.
>
> The problem that I am having is that I have to use a fair amount of
> back pressure on the stick to maintain level flight. Roger told me
> to adjust the ailerons up to level it out. Perhaps I just haven't
> done it enough, but the problem doesn't seem to be abating. I have
> them noticeably reflexed up but it still wants to dive to the
> ground. I am going to go search again for the tab. My question is
> the amount and number of washers under the motor. (plans are a bit
> vague) Perhaps the angle of the motor is forcing it down.
>
> A preliminary check (won't know until I can get level flight
> established) is that the prop does indeed give me more speed. As
> you know I put 800x6 tires on Dart, expecting that the increased
> size would slow me down a bit, but I am so far indicating that it
> is going faster than it was before. I need to stabilize and then do
> some more tests.
> Larry, Ore
> do not archive
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Message 6
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--> Kolb-List message posted by: "Larry Cottrell" <lcottrell@fmtcblue.com>
> There is one more thing that affects pitch trim besides stabilizer
> incidence and aileron reflex and that is the shape and size of the wind
> screen. Have you changed it from your previous setup?
Most times corrections can be made with just the stabilizer and
> aileron adjustments but also check to be sure that your CG has not move
> forward during your rebuild.
The enclosure is the same, I only had to replace the center portion and it
was cut the same size. I have not weighed it, but the only change is a
breakaway tail wheel. It weighs about four pounds more, but I have had one
before, so I doubt very much if that is the problem. Since it would move the
cg back.
Larry, Or
do not archive
Message 7
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--> Kolb-List message posted by: "John Hauck" <jhauck@elmore.rr.com>
| Larry, Or
Larry C:
I have discovered, over the years, the static position of the ailerons
will not be the same as the flying position. In flight, with air
flowing over the wing, the ailerons are pushed down somewhat. When
the ailerons become only slightly drooped, they will, in turn, cause
the nose of the aircraft to pitch down.
Someone else mentioned larger tires causing more nose down pitch, as
well as a Warp Drive producing more thrust and more nose down pitch.
I certainly agree with this. However, you may be able to overcome
this change with a little more up aileron.
It is easy for us mkIII flyers to experiement with the flaps and see
the results. That is how I discovered the air flow pushing down on
flaps and ailerons on my mkIII.
Take care,
john h
mkIII (got power, but not yet installed)
Message 8
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| Subject: | Re: Landing light wagger |
Thanks for the info Delete my last email to you
Thanks a Bunch I bet they will see me coming in for a landing now
Ellery
Message 9
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--> Kolb-List message posted by: "Larry Cottrell" <lcottrell@fmtcblue.com>
> Someone else mentioned larger tires causing more nose down pitch, as
> well as a Warp Drive producing more thrust and more nose down pitch.
> I certainly agree with this. However, you may be able to overcome
> this change with a little more up aileron.
I will try more aileron tomorrow. I must have set the record for dirt
landings today. I had them turned up quite noticeably to the point that I
began to believe that I had misunderstood what Roger was telling me. I had
not considered the tires, but when you think of it there is a lot of surface
out there dragging the front of the plane down. Maybe I will fill them with
helium to counteract the drag. :-)
I flew until 1215 today and then used the rest of the day installing my
Kunzelman strobes. Every thing was fine until I tried to make the plug
connection that goes into the box. Man there has to be a better way. I just
was not comfortable with the way that the plugs were put together, so I
ended up soldering them. I like the strobes, the service and the man, but
his ears had to be burning today! They need to connect the plug ends at the
factory and leave one end open so that you can cut them to the size that you
want.
Larry, Or
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Message 10
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| Subject: | Primer bulb bypass |
This is the primer bulb plumbing I used in my Mk 3. Works great and no more
cramped fingers trying to clamp the bypass line closed.
--
Rick Girard
"Ya'll drop on in"
takes on a whole new meaning
when you live at the airport.
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