Today's Message Index:
----------------------
1. 01:49 AM - Re: Pitot static port location (The Kuffels)
2. 05:50 AM - Re: zenair floats plans. (Ellery Batchelder Jr)
3. 06:01 AM - Re: Kolb/Jabiru carb overflow (Thom Riddle)
4. 06:02 AM - Re: Pitot static port location (Richard Pike)
5. 06:39 AM - Re: Re: Pitot static port location (Mike Welch)
6. 05:51 PM - Re: Pitot static port location (Dana Hague)
Message 1
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Subject: | Re: Pitot static port location |
Mike,
Strongly endorse Hauck's suggestions for a static system of two side ports
connected by a T. It has been a well proven industry standard for many
years.
To expand slightly:
Put the ports as far aft on the nose cone as reasonable. You want the air
at the port to be going parallel to the surface, not accelerating around a
curve.
<< Once flying, the static ports can be calibrated by taking a tiny bit of
material off the aft side of each static port, if they are pressurizing, or
off the forward side of the hole if it is creating a vacuum. >>
There is a simpler way of determining which way to trim the ports than
airspeed error. Go to a long, level runway and make a takeoff keeping the
aircraft planted on the runway as long as possible. Just before liftoff
note any change in *altitude*. If the altimeter goes up you have a vacuum,
if it goes down you have static pressurization. This maneuver does take
some practice and should be repeated several times to be sure of correct
indication.
Instead of removing material you can add wedges on the other side: front
side if static is high, back side if static is low. You can also buy static
ports with a wedge built in. Much more professional looking than balsa
wedges glued on. These you rotate to get most accurate readings.
Tom Kuffel
Message 2
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Subject: | Re: zenair floats plans. |
straight floats ? if I had the money I would be interested might be in th
e spring
Ellery Batchelder Jr.
-----Original Message-----
From: Malcolm Brubaker <brubakermal@yahoo.com>
Sent: Sat, Jan 15, 2011 6:33 pm
Subject: Re: Kolb-List: zenair floats plans.
at grose you would.mine atre best suted for a singleseat or firestar
i have a set of aeroset floats for $5,000
Malcolm Brubaker
Michigan Sport
Pilot Repair
LSRM-A, PPC, WS
(989)513-3022
From: Ellery Batchelder Jr <elleryweld@aol.com>
Sent: Sat, January 15, 2011 9:56:18 AM
Subject: Re: Kolb-List: zenair floats plans.
My Grosse weight is 1250 I would probably sink them
Ellery Batchelder Jr.
-----Original Message-----
From: Malcolm Brubaker <brubakermal@yahoo.com>
Sent: Fri, Jan 14, 2011 7:46 pm
Subject: Re: Kolb-List: zenair floats plans.
$2000 firm on the price they are prety nice floats i lost all my pics onth
e computer so no build pics but i could take some of them they are wraped
in
phome and suran hanging in my hanger they are 12 ft long 950 displaceme
nt w one rutter no rigging
Malcolm Brubaker
Michigan Sport
Pilot Repair
LSRM-A, PPC, WS
(989)513-3022
From: "elleryweld@aol.com" <elleryweld@aol.com>
Sent: Wed, January 12, 2011 7:04:50 PM
Subject: RE: Kolb-List: zenair floats plans.
-----Original Message-----
From: "Malcolm Brubaker" <brubakermal@yahoo.com>
Subject: Kolb-List: zenair floats plans.
several years aho i sold a set of plans for the zenair floats to a Kolber
can anyone rember buying a set? i lost my copy and need another mal
Malcolm Brubaker
Michigan Sport
Pilot Repair
LSRM-A, PPC, WS
(989)513-3022
malcolm i am the one that got the plans for the floats from you i will see
about getting a copy made up i will let you know when i have that done i
think i remember where i last had them
________________________________
From: "elleryweld@aol.com" <elleryweld@aol.com>
Sent: Wed, January 12, 2011 7:43:44 AM
Subject: RE: Kolb-List: Air foil for cable...
would it reduce drag on a cable if you was to fold a peice of vinal tape
in half
to leave a 3/4 inch trailing edge? let the testing begin
-----Original Message-----
From: "Nick Cassara" <nickc@mtaonline.net>
Subject: Kolb-List: Air foil for cable...
Kolber's,
A year or two ago someone posted drag values for parts of a Kolb, if I
remember right. I was amazed at the drag values for the cables on the p;
-Matt Drall===========
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Message 3
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Subject: | Re: Kolb/Jabiru carb overflow |
Chris,
The spring internal to the float valve in the Bing Carb that Lynn is talking about
has nothing to do with the fuel pressure being too high. The spring internal
to the float valve performs a single function, to dampen/absorb the vibrations
that occur in the float system on a running engine. So, different internal
float valve springs perform that function slightly differently but have no effect
on the fuel pressure nor the pressure between the float valve tip and the
seat/orifice, nor the ability to resist the pressure applied by the fuel pump
while the engine is running.
Bottom line is that this internal float valve spring can be ignored in thinking
about your current high pressure situation. Having a float valve with a tip in
good condition is important and you've already tended to that.
--------
Thom Riddle
Buffalo, NY (9G0)
Kolb Slingshot SS-021
Jabiru 2200A #1574
Tennessee Prop 64x32
Don't accept your dog's admiration as conclusive evidence that you are wonderful.
Ann Landers
Read this topic online here:
http://forums.matronics.com/viewtopic.php?p=327181#327181
Message 4
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Subject: | Re: Pitot static port location |
Boyd's drawing looks like what I am using. One is the pitot, the other is static
port, both are out away from the airframe in clean air, seems to make life simpler.
Worked right the first time, needed no tuning. Your results may vary...
Details here:
http://www.bcchapel.org/pages/0003/pg7.htm
Richard Pike
MKIII N420P (420ldPoops)
Read this topic online here:
http://forums.matronics.com/viewtopic.php?p=327182#327182
Message 5
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Subject: | Re: Pitot static port location |
> Boyd's drawing looks like what I am using.
> Richard Pike
> MKIII N420P (420ldPoops)
Bro. Richard=2C
Although I do agree Boyd's and your suggestion of the static inlet
works well out on an extended tube=2C I would prefer to go with the
type of fitting that mounts on the surface of the fuselage. But=2C thanks
for your input!!
At this point=2C I concede I know when I'm given good advice. John H
was generous enough to offer what says worked well for him. Although
I did agree=2C I was curious if a slight (unnecessary) modification would b
e
better. He=2C Rick G=2C and Ted K didn't think so!! (probably others=2C t
oo)
That's good enough for me!!
I appreciate everyone's input=2C and value the advice I have been given.
I think I'll go with the two=2C side fuselage=2C surface mount ports=2C no
inside
cabin venting=2C and 1/16" vent holes.
Thanks=2C guys.
Mike Welch
Message 6
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Subject: | Pitot static port location |
Mike,
I'm coming into this discussion late, sounds like you already have a plan,
but I'll add my two cents:
Putting ports on both sides helps to cancel out any variation as the
aircraft yaws. On the bottom wouldn't be good as it'd change as AOA
changes. Inside the cockpit is a bad place because the air inside is
nearly always _not_ at static pressure.
I built a concentric pitot/static tube, with the inner tube for the pitot
and the outer one (sealed at front and back) with four holes spaced around
the center for static air. Mounted on the nose such a system will give
very good undisturbed static air.
-Dana
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