Today's Message Index:
----------------------
1. 08:41 AM - Re: Re: Drooping FireFly Flaperons (pj.ladd)
2. 09:13 AM - Re: Re: Dipole antenna from co-ax (Tom Longo)
3. 09:44 AM - Re: Re: Drooping FireFly Flaperons (Richard & Martha Neilsen)
4. 11:57 AM - Re: Painting Lexan (KOLB AIRCRAFT)
5. 01:39 PM - Weight and Balance? (grantr)
6. 03:11 PM - Re: Oshkosh 2008 (Mike Welch)
7. 07:58 PM - Re: Painting Lexan (boyd)
8. 07:58 PM - Re: Re: Drooping FireFly Flaperons (boyd)
9. 08:08 PM - Generac test data..IE: Jimmys temps (Don G)
10. 08:44 PM - Re: Re: Dipole antenna from co-ax (boyd)
Message 1
| INDEX | Back to Main INDEX |
| NEXT | Skip to NEXT Message |
| LIST | Reply to LIST Regarding this Message |
| SENDER | Reply to SENDER Regarding this Message |
|
| Subject: | Re: Drooping FireFly Flaperons |
There are other ways to trim a Kolb rather than add additional weight.>>
Hi John,
lowering elevators etc will no doubt get the job done but it doesn`t change
the W&B calc, and that is the problem surely
Pat (seeking enlightenment)
Message 2
| INDEX | Back to Main INDEX |
| PREVIOUS | Skip to PREVIOUS Message |
| NEXT | Skip to NEXT Message |
| LIST | Reply to LIST Regarding this Message |
| SENDER | Reply to SENDER Regarding this Message |
|
| Subject: | Re: Dipole antenna from co-ax |
Hi Scott, RG58 is 50 ohm RG59 & RG6 are 75 ohm, make sure you use RG59.
-----Original Message-----
From: owner-kolb-list-server@matronics.com
[mailto:owner-kolb-list-server@matronics.com]On Behalf Of icrashrc
Sent: Saturday, July 19, 2008 3:59 PM
Subject: Kolb-List: Re: Dipole antenna from co-ax
Thanks to all!
George, Boyds site was the one i remembered.
Mike, Thanks for some interesting reading. And the kudos on the overhead
panel. I'm glad you like it!
tlongo, I don't seem to have a program to open that file. And what type of
co-ax is 50 ohm? rg-58, rg-59, rg-6, something else...?
Thanks again,
Scott
Read this topic online here:
http://forums.matronics.com/viewtopic.php?p=193803#193803
Checked by AVG - http://www.avg.com
6:00 AM
--
Message 3
| INDEX | Back to Main INDEX |
| PREVIOUS | Skip to PREVIOUS Message |
| NEXT | Skip to NEXT Message |
| LIST | Reply to LIST Regarding this Message |
| SENDER | Reply to SENDER Regarding this Message |
|
| Subject: | Re: Drooping FireFly Flaperons |
I moved my battery to the nose cone. This moved the calculated CG to right
where it is supposed to be. I was later told by Dennis Souder (the previous
owner of Kolb after Homer) that the CG calculations were set to keep the FAA
happy but CG figures a bit aft of the limit fly just fine.
I for one would approach aft CG limits very carefully.
Rick Neilsen
Redrive VW powered MKIIIC
----- Original Message -----
From: "pj.ladd" <pj.ladd@btinternet.com>
Sent: Tuesday, July 22, 2008 11:39 AM
Subject: Re: Kolb-List: Re: Drooping FireFly Flaperons
>
> There are other ways to trim a Kolb rather than add additional weight.>>
>
> Hi John,
> lowering elevators etc will no doubt get the job done but it doesn`t
> change the W&B calc, and that is the problem surely
>
> Pat (seeking enlightenment)
>
>
>
Message 4
| INDEX | Back to Main INDEX |
| PREVIOUS | Skip to PREVIOUS Message |
| NEXT | Skip to NEXT Message |
| LIST | Reply to LIST Regarding this Message |
| SENDER | Reply to SENDER Regarding this Message |
|
| Subject: | Re: Painting Lexan |
JIM, WE USE A SINGLE STAGE WITH A LITTLE FLEX , YOU CAN GET THIS MIXED
IN A SPRAY CAN IF YOU LIKE. THANKS DONNIE.
----- Original Message -----
From: Jim Kmet
To: kolb-list@matronics.com
Sent: Saturday, July 19, 2008 9:04 AM
Subject: Kolb-List: Painting Lexan
Hi all, A few of you have painted Borders around your Window & Door
frames, My question is what Kind of paint works well on the Lexan we
have on our Kolbs?? Thanks, Jim Kmet
Cookeville, TN
MK-3C
Message 5
| INDEX | Back to Main INDEX |
| PREVIOUS | Skip to PREVIOUS Message |
| NEXT | Skip to NEXT Message |
| LIST | Reply to LIST Regarding this Message |
| SENDER | Reply to SENDER Regarding this Message |
|
| Subject: | Weight and Balance? |
John Hauck Wrote
> Weight and balance of a Kolb is one of those unique areas. There are folks
> out there still flying Kolbs with lead in the nose to make the paperwork
> work. I put a 11+ lb tailwheel on mine for a couple reasons. Primarily,
> the Maule Tundra Tailwheel, 8" pneumatic with tapered roller bearings in the
> pivot, is the only tailwheel I could afford that will stand up to the weight
> of the tail on my MKIII. The other reason was to demonstrate Kolbs don't
> particularly have an aft cg problem, if built, more or less, according to
> the plans. In addition to the heavy tailwheel and prop on a 4" extension,
> I fly with 150 lbs of fuel and 100+ lbs of cargo aft of the cg. I do get
> some offset from my modified main gear being moved 8" forward, but not much,
> since they are very close to the cg.
>
>
My Mark III manual says the airplane should balance between 25% and 35% wing chord
which is 16.5 to 23.1 inches behind the leading edge of the wing.
I am a light pilot at 155 ready to fly so my weight and balance calculation says
I need I 10 lbs in the nose to make the aft limit at 23.1 inches. Or a minimum
weight of 177 for the pilot with no ballast.
So if I am reading this right you are saying to forget about the Weight and balance
and do not add the weight?
With no ballast my cg would be at 23.95 or about and inch aft of the aft limit.
Read this topic online here:
http://forums.matronics.com/viewtopic.php?p=194430#194430
Message 6
| INDEX | Back to Main INDEX |
| PREVIOUS | Skip to PREVIOUS Message |
| NEXT | Skip to NEXT Message |
| LIST | Reply to LIST Regarding this Message |
| SENDER | Reply to SENDER Regarding this Message |
|
Hi Rick=2C
I will be at Oshkosh this next week. I don't know the exact dates...my s
on in Afghanistan set up the dates we'll be there. He's coming home on vac
ation in a couple days=2C and we're all heading to the Fly-In for two days.
I'll be sure and look you up...and say howdy.
My apologies to anyone re: my email responses. I'm living in an RV trail
er=2C and having to use the public library computers. Sure cuts down on my
porn! (That's a JOKE!!!!!) I sometimes go three or four days between ch
ecking email. I'm building my "shop" (hangar). It's 40 X 48.
See ya at Oshkosh=2C Rick.
Mike Welch
MkIII (on hold=2C presently)
From: NeilsenRM@comcast.netTo: kolb-list@matronics.comSubject: Kolb-List: O
shkosh 2008Date: Fri=2C 18 Jul 2008 10:19:22 -0400
I will be at AirVenture "Oshkosh" camping with my plane all week. Is anyone
else going to be there?
Rick Neilsen
Redrive VW powered MKIIIC
_________________________________________________________________
Time for vacation? WIN what you need- enter now!
http://www.gowindowslive.com/summergiveaway/?ocid=tag_jlyhm
Message 7
| INDEX | Back to Main INDEX |
| PREVIOUS | Skip to PREVIOUS Message |
| NEXT | Skip to NEXT Message |
| LIST | Reply to LIST Regarding this Message |
| SENDER | Reply to SENDER Regarding this Message |
|
I painted with poly tone and after 5 or 6 years I am seeing some minor
cracking in the lexan. The poly tone seems to melt into the plastic so no
scuffing is necessary.
Boyd
>>>>>>>>>>>>>
Hi all, A few of you have painted Borders around your Window & Door frames,
My question is what Kind of paint works well on the Lexan we have on our
Kolbs?? Thanks, Jim Kmet
Cookeville, TN
MK-3C
Message 8
| INDEX | Back to Main INDEX |
| PREVIOUS | Skip to PREVIOUS Message |
| NEXT | Skip to NEXT Message |
| LIST | Reply to LIST Regarding this Message |
| SENDER | Reply to SENDER Regarding this Message |
|
| Subject: | Re: Drooping FireFly Flaperons |
No, drooping should not increase the angle of attack, it should reduce it.
Drooping the flaps changes the overall shape of the airfoil giving it more
lift, and more lift at any given speed should require less angle of attack
to remain in level flight. And by drooping the flaps, the center of lift
for the wing should move to the rear. With the center of lift more aft it
should require more down pressure on the tail to remain in level flight.
Don't confuse increased lift with more angle of attack. And by increased
lift, am referring to increasing lift due to the change of airfoil shape.
However I can think of one reason that could explain the results that seem
to go against the grain....
If the slight deflection of the flaps causes the airflow going across the
wing to descend causing it to strike the top of the horizontals and
elevator, it could increase the air pressure at that point. Giving results
that seem opposite from what you would expect. If this is the case and
further testing is warranted. It could cause an upset in attitude with
changes in airspeed as the deflection angle of the air changes. This could
become potentially dangerous if the plane has to have massive stick pressure
changes with speed changes.
Try an experiment and reflex the flaps and see if the back pressure is
reduced. It might tell you more about your situation.
Boyd Young
Kolb mkIIIC
912ul 530 + hours and counting.
Private pilot since 1979
>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>
Drooping the flaperons (or flaps) a bit increases the angle of attack a bit.
The increased angle of attack results in a little more lift. The increased
lift would result in a slight climb and loss of airspeed unless the pilot
retrims, or in Jack's case, relaxes the back pressure. Relaxing the back
pressure restores the angle of attack to its pre-droop state with a
resulting slight nose down pitch. Thus the stabilized state is restored with
less up elevator pressure.
Message 9
| INDEX | Back to Main INDEX |
| PREVIOUS | Skip to PREVIOUS Message |
| NEXT | Skip to NEXT Message |
| LIST | Reply to LIST Regarding this Message |
| SENDER | Reply to SENDER Regarding this Message |
|
| Subject: | Generac test data..IE: Jimmys temps |
Jimmy, I am very glad you are progressing well with your Generac on the FS.
I want to call attention to one thing you mentioned in your first test data, about
the oil temps. Particularly the part about the oil temps at 235 -250 on WOT
climb needing "fixed". And your subsequent decision to bring them down.
If that Engine was a Honda V-twin, just for instance, and you were interested in
obtaining an OEM account to be able to purchase them to install on ...lets say...you
line of Water pumps...or "Jimmy's ditch Digger's" or any other machine
that you intended to market. WE (at Honda) would not allow you to proceed (we
wouldn't sell you engines) with oil temps below 212F at under normal operating
conditions. I am reasonably certain that Generac states, as do most all manufacturers
of Industrial V-twins, that the minimum oil temps should be 212F and
the max around 275F. I am afraid that where ever you got the information you
were to high , it is wrong.
You see due to the wet sump, atmospheric vented design of these engines, water
vapor condenses in the crankcase during each "cool-down" period after an engine
is run..even in Texas. With just a couple of "cool-downs" there will be enough
water in the crankcase to begin to rust the oil pump, as it is submerged in
the very bottom of the crankcase (lowest point). There is no place for water
to collect as in a dry sump aircraft engine, other than right in the oil pump.
Next place rust will develop, will be the lifters, cam lobes, the rings, and
the cylinder sleeve, then the ball bearing on the PTo end of the crank (if it
is so equipped). generally in that order. We in the engine industry have an awful
lot of experience on this matter Jimmy, and I assure you, modern oil can take
alot more that the 250 degrees you were having. The oil companies by the way
give us the maximum limits, and we generally pad them buy 25 to 35% to give
us a cushion. You see, since we PAY for warranties in our industry, we watch
these thing very close. That Engine you are using will likely go to 2500 hours
or more Jimmy if operated as the mfg recommends, and I assure you...it wont if
you run it at 180F oil temps.
Jimmy I have been in this industry since before the V-twins were brought to market,
and I have been with them every step of the way. It is known in some circles
that I have promoted there use in flying machines, and I would take it personally
if you bent your bird and maybe even hurt yourself and the engine got
the blame, no matter what brand, due to somebody giving you bad info.
--------
Don G.
Central Illinois
Kitfox IV Speedster
Luscombe 8A
Read this topic online here:
http://forums.matronics.com/viewtopic.php?p=194480#194480
Message 10
| INDEX | Back to Main INDEX |
| PREVIOUS | Skip to PREVIOUS Message |
| NEXT | Skip to NEXT Message |
| LIST | Reply to LIST Regarding this Message |
| SENDER | Reply to SENDER Regarding this Message |
|
| Subject: | Re: Dipole antenna from co-ax |
Use 50 ohm coax..... the 75 ohm stuff is for cable tv. Or xmitter
designed for 75 ohm loads.
Your transmitter is designed for 50 ohm coax and matched to an antenna tuned
to a 1 to 1 match,, which is a 50 ohm impedance.
I am holding in my warm hands a piece of coax " PLASTOID CORP. RG- 58 A/U"
it is 0.2 inches in diameter, it has a braid just under the jacket, with an
insulator over the multi strand center conductor. BETTER STUFF.
If you want to go smaller..... I have some " BELDEN 8216 RG - 174 / U"
0.1 inch in diameter, also multi strand center core.... It has higher
internal losses but is good for low power and very short distances. GOOD
STUFF
There is one other but I cant remember the number off the top of my head.
Rg 222??????? It is usually brown in color and it is DOUBLE shielded and
is better suited for installations with lots of other RFI ( Radio Frequency
Interference) in the area. My best guess is 0.2 inches in diameter as
well. BEST STUFF. I considered it an over kill in my kolb.
Try to stay away from the coax with a solid core center wire unless it is
for an installation that will have no movement.
Boyd Young
Kolb MkIIIC
530 + hours
www.brigham.net/~byoung/antenna.html
there is not any tech info on the sight..... mostly a picture and short
description.
Ham Radio Extra Class N7WFM
>>>>>>>>>>>>>>>>>>>
Hi Scott, RG58 is 50 ohm RG59 & RG6 are 75 ohm, make sure you use RG59.
-----Original Message-----
From: owner-kolb-list-server@matronics.com
[mailto:owner-kolb-list-server@matronics.com]On Behalf Of icrashrc
Sent: Saturday, July 19, 2008 3:59 PM
Subject: Kolb-List: Re: Dipole antenna from co-ax
Thanks to all!
George, Boyds site was the one i remembered.
Mike, Thanks for some interesting reading. And the kudos on the overhead
panel. I'm glad you like it!
tlongo, I don't seem to have a program to open that file. And what type of
co-ax is 50 ohm? rg-58, rg-59, rg-6, something else...?
Thanks again,
Scott
Other Matronics Email List Services
These Email List Services are sponsored solely by Matronics and through the generous Contributions of its members.
-- Please support this service by making your Contribution today! --
|