Today's Message Index:
----------------------
1. 03:42 AM - Re: Christmas greetings (David Lucas)
2. 04:24 AM - Re: Holiday Greetings (Eugene Zimmerman)
3. 06:31 AM - Monument Valley at Night (Richard Pike)
4. 07:37 AM - Re: Monument Valley at Night (Larry Bourne)
5. 08:05 AM - drag strut attach point (boyd)
6. 08:21 AM - Wire Label Printer (jerb)
7. 08:32 AM - Re: FF tailwheel weight (jerb)
8. 08:36 AM - Re: Wire Label Printer (Larry Bourne)
9. 10:04 AM - Any known Kolb in flight structural failures (John H Murphy)
10. 10:12 AM - Re: Merry Christmas (David Lucas)
11. 10:18 AM - Re: Monument Valley at Night (Ron)
12. 10:30 AM - Re: Re: Merry Christmas (Bob Noyer)
13. 11:07 AM - Re: FF tailwheel weight (David Kulp)
14. 12:08 PM - Re: Christmas greetings (David Kulp)
15. 12:08 PM - Suzuki Bottom rail Attach (Ron)
16. 12:31 PM - Re: Christmas greetings (Larry Cottrell)
17. 01:13 PM - Re: Suzuki Bottom rail Attach (herbgh@juno.com)
18. 01:16 PM - Re: Suzuki Bottom rail Attach (neilsenrm@comcast.net)
19. 01:32 PM - Re: Re: How do you like your FireFly? (Jack B. Hart)
20. 01:40 PM - Re: Suzuki Bottom rail Attach (neilsenrm@comcast.net)
21. 02:30 PM - Engine damper mounts (Richard Girard)
22. 02:36 PM - Re: Suzuki Bottom rail Attach (Richard Girard)
23. 03:54 PM - Re: Suzuki Bottom rail Attach (Dan G.)
24. 04:05 PM - Re: Suzuki Bottom rail Attach (Ron)
25. 04:18 PM - Re: Suzuki Bottom rail Attach (herbgh@juno.com)
26. 04:21 PM - Re: Suzuki Bottom rail Attach (Ron)
27. 04:33 PM - Re: Suzuki Bottom rail Attach (Ron)
28. 05:00 PM - Re: Any known Kolb in flight structural failures (Dana Hague)
29. 06:13 PM - Re: Any known Kolb in flight structural failures (robert bean)
30. 06:13 PM - Re: How do you like your FireFly? (Dave Bigelow)
31. 06:25 PM - Re: Suzuki Bottom rail Attach (Dan G.)
32. 07:10 PM - Re: Re: How do you like your FireFly? (N27SB@aol.com)
33. 07:34 PM - Re: Any known Kolb in flight structural failures (JetPilot)
34. 09:21 PM - Re: Wire Label Printer (jerb)
35. 09:38 PM - Re: Re: How do you like your FireFly? (jerb)
36. 09:44 PM - Re: Re: How do you like your FireFly? (jerb)
Message 1
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| Subject: | Re: Christmas greetings |
Well, I was amused by it Dana, and not being a US citizen have got no political
affiliation with either party. It was just good humour. Made me smile :-) Thank
You !
Happy Christmas everyone !
David.
PS, Dana, I also like your regular Post Scripts ! Keep 'em comming !
Do Not Archive.
Read this topic online here:
http://forums.matronics.com/viewtopic.php?p=154149#154149
Message 2
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| Subject: | Re: Holiday Greetings |
Thanks Bob,
Merry Christmas to you, and God's best to all for 2008.
Gene
On Dec 24, 2007, at 10:01 PM, Bob Noyer wrote:
> I would like to extend my greetings for a Merry Christmas/holiday
> of choice to all of The Kolb Family. And further, Good Health, Safe
> Flying, and whatever makes you happy.
>
> regards,
> Bob N. FireFly 070 Old Kolb
> http://www.angelfire.com/rpg/ronoy/
>
>
do not archive
Message 3
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| Subject: | Monument Valley at Night |
To all the Kolbers who get to enjoy Monument Valley, the website
Astronomy Picture of the Day has just posted a marvellous view of the
valley at night, might bring back some pleasant memories. Enjoy!
http://antwrp.gsfc.nasa.gov/apod/ap071225.html
Richard Pike
MKIII N420P (420ldPoops)
Message 4
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| Subject: | Re: Monument Valley at Night |
Richard, that is tremendous ! ! ! Thanks very much. Merry Christmas !
! ! Lar.
Richard Pike wrote:
>
> To all the Kolbers who get to enjoy Monument Valley, the website
> Astronomy Picture of the Day has just posted a marvellous view of the
> valley at night, might bring back some pleasant memories. Enjoy!
> http://antwrp.gsfc.nasa.gov/apod/ap071225.html
>
> Richard Pike
> MKIII N420P (420ldPoops)
>
>
Message 5
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| Subject: | drag strut attach point |
Jim..... with regard to the heavy left wing let me offer an opinion.
Before you make the changes fly the plane straight and level and while doing
so look at your ailerons. Try to tell if they are both in the same
relative position.... or is one up and the other down....
If the ailerons are both in the neutral position, you would be better with a
trim tab....
However if on the (heavy wing) the aileron is down, then increasing the
incidence on the heavy wing Or decreasing the incidence on the light wing
would be the correct thing to do. This will cause the ailerons to both fly
in the neutral position...
You could ask me how I know....
Instead of buying the adjustable universal mounts... I modified mine by
welding a very small bead on one side of the 1/2 inch mounting hole and
filing out the other side. I increased the incidence on one and decreased
it in the other.... it flew hands off but the ailerons were out of the
neutral position.... I later bought another original set and installed
them and installed a trim tab... now things fly hands off and ailerons are
in the neutral position,
I still have the modified mounts in the shop (I think) if you want to try.
Boyd...
Brigham city Utah.
Message 6
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| Subject: | Wire Label Printer |
Hey Folks,
Some of you have been looking for in-expensive wire/cable label
printer. Happen to see the Lowe's in my area has a Rhino Label
Printer for printing wire labels. It's around $49 for the printer,
label tape is addition. You'll find it in the electrical dept. This
is what they call an In/Out item meaning it is not a regular carried
item and will not be on their web site. A great Christmas gift for
yourself (always get what you want that way)... If you need their
item number, let me know.
jerb
Message 7
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| Subject: | Re: FF tailwheel weight |
Bob N.,
Now we all know this was done on purpose so you wouldn't feel guilty
over stuffing yourself with a large Christmas dinner. It just will
not work Bob, you will not fool the airplane.
jerb
At 08:54 PM 12/21/2007, you wrote:
>Dave,
>
>As promised, I weighed my FF's tail wheel. Have a rather std FF,
>brakes, larger tires, not much else for weight, about 3 gal fuel.
>Tailwheel on electronic scale=56# When I came home, the dang scale
>had 'slud' over and fell on driveway when I opened the door! Now my
>weight has dropped to 146 from 175!!!
>
>
>regards,
>Bob N. FireFly 070 Old Kolb
><http://www.angelfire.com/rpg/ronoy/>http://www.angelfire.com/rpg/ronoy/
>
>
Message 8
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| Subject: | Re: Wire Label Printer |
Thanks ! ! ! I took one look at this and forwarded it to my work
email. My guys can really use that. Merry Christmas ! !
! Lar. Do not Archive.
jerb wrote:
> Hey Folks,
> Some of you have been looking for in-expensive *wire/cable label
> printer*. Happen to see the Lowe's in my area has a Rhino Label
> Printer for printing wire labels. It's around $49 for the printer,
> label tape is addition. You'll find it in the electrical dept. This
> is what they call an In/Out item meaning it is not a regular carried
> item and will not be on their web site. A great Christmas gift for
> yourself (always get what you want that way)... If you need their
> item number, let me know.
> jerb
> *
>
>
> *
Message 9
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| Subject: | Any known Kolb in flight structural failures |
Has there ever been a reported structural failure of a Kolb in flight? The kind
of structural failure such as a collapsed wing, struts, boom, cage or tail feathers?
Read this topic online here:
http://forums.matronics.com/viewtopic.php?p=154205#154205
Message 10
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| Subject: | Re: Merry Christmas |
And a very blessed Christmas to you too Richard !
By the way, in lieu of 'TPGold', doesn't 'SeaFoam' have certain medicinal qualities
suitable to this application [Wink]
Happy Christmas everyone !
David.
Do Not Archive.
Read this topic online here:
http://forums.matronics.com/viewtopic.php?p=154207#154207
Message 11
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| Subject: | Re: Monument Valley at Night |
That's a really nice picture, now I have to make the Kolb pilgrimage there one
of these days.
Ron
Arizona
=============
---- Richard Pike <richard@bcchapel.org> wrote:
============
To all the Kolbers who get to enjoy Monument Valley, the website
Astronomy Picture of the Day has just posted a marvellous view of the
valley at night, might bring back some pleasant memories. Enjoy!
http://antwrp.gsfc.nasa.gov/apod/ap071225.html
Richard Pike
MKIII N420P (420ldPoops)
--
kugelair.com
Message 12
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| Subject: | Re: Merry Christmas |
Re: TpG+Seafoam..mix 50:1....or is it 1:50. In the case of 4-strokes,
just a shot every hr or when needed as a pick-me-up.
regards,
Bob N. FireFly 070 Old Kolb
http://www.angelfire.com/rpg/ronoy/
do not archive
Message 13
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| Subject: | Re: FF tailwheel weight |
Bob
In re weighing tailwheels -- I'm sure you've heard of the woman
who
gave birth at a fishing camp. The infant was weighed on the fish-
weighing scales; weighed 37 lbs!
On Dec 21, 2007, at 9:54 PM, Bob Noyer wrote:
> Dave,
>
> As promised, I weighed my FF's tail wheel. Have a rather std FF,
> brakes, larger tires, not much else for weight, about 3 gal
fuel.
> Tailwheel on electronic scale=56# When I came home, the dang
scale
> had 'slud' over and fell on driveway when I opened the door! Now
my
> weight has dropped to 146 from 175!!!
>
>
> regards,
> Bob N. FireFly 070 Old Kolb
Russ, I suggested to him to hawk it at a Curves For Women - he could
pick up quite a few bucks for it!
I'm very greatful for his contribution to setting up the trailer I'm
fabricating for my FF! He's quite a fine gentleman.
Hope all on the list - active and lurkers - are having a blessed
Christmas. Best wishes for a fine year of flying ahead!
Dave Kulp
Bethlehem, PA
FireFly 098
Message 14
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| Subject: | Re: Christmas greetings |
Dana,
I thought this to be a forum for building and flying Kolb
aircraft not a right
wing evangelical republican propaganda site.
John
Dana Hague <d-m-hague@comcast.net> wrote:
To All My Democrat Friends:
Please accept with no obligation, implied or implicit, my best
wishes for an environmentally conscious, socially responsible,
low-
stress, non-addictive, gender-neutral celebration of the winter
solstice holiday, practiced within the most enjoyable traditions
of
the religious persuasion of your choice, or secular practices of
your choice, with respect for the religious/secular
persuasion...Anyone who cares,My bro lists pretty far to the port side
and he sends stuff like this. We don't agree on everything
philosophically, butwe both still have a sense of humor.Merry Christmas
to all. Keep smiling.Dave KulpBethlehem, PADo Not Archive
Message 15
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| Subject: | Suzuki Bottom rail Attach |
As I mentioned earlier folks to those who are interested, here are some of the
missing pix of the bottom mount rails. All hardware is SS so after painting I
will never have rust streaks from the bolts. I need to now have the motor sit
on top of this and then adjust it to center and then drill for final placement.
In future if the motor need to be canted for whatever purpose it will be simple
to purchase the bottom Angles .25 6061 alum from Spruce and adjust as needed.
The angles are fairly inexpensive from spruce and they cut them to length
for you, I think its something under 5 bucks per foot. The rubber biscuits are
from NAPA for $2.50 each. Not expensive at all even for us on a budget. The bolts
that will fasten the whole thing together will be stainless as well and fairly
robust, I will make sure they fill the holes in the rubber donuts 5/16 comes
to mind but ain't sure yet.
Merry Christmas
Ron
Arizona
Message 16
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| Subject: | Re: Christmas greetings |
Personally I thought that it was pretty funny and anyone who could not
see the irony of the missive is most likely the cause of it and should
damn well get over themselves.
Merry Christmas to all
Larry C
do not archive
----- Original Message -----
From: David Kulp
To: kolb-list@matronics.com
Sent: Tuesday, December 25, 2007 1:08 PM
Subject: Re: Kolb-List: Christmas greetings
Dana,
I thought this to be a forum for building and flying Kolb
aircraft not a right
wing evangelical republican propaganda site.
John
Dana Hague <d-m-hague@comcast.net> wrote:
To All My Democrat Friends:
Please accept with no obligation, implied or implicit, my best
wishes for an environmentally conscious, socially responsible,
low-
stress, non-addictive, gender-neutral celebration of the winter
solstice holiday, practiced within the most enjoyable traditions
of
the religious persuasion of your choice, or secular practices of
your choice, with respect for the religious/secular persuasion...
Anyone who cares,My bro lists pretty far to the port side and he sends
stuff like this. We don't agree on everything philosophically, butwe
both still have a sense of humor.Merry Christmas to all. Keep
smiling.Dave KulpBethlehem, PADo Not Archive
Message 17
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| Subject: | Re: Suzuki Bottom rail Attach |
Ron
Can you give me enough info on the Napa rubber biscuits to enable me to order
them or direct the Napa folks to the correct catalog..? I went this route once
before , but the local napa guy could not find them by description..Herb
_____________________________________________________________
Click here for free info on Graduate Degrees.
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Message 18
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| Subject: | Re: Suzuki Bottom rail Attach |
NextPart_Webmail_9m3u9jl4l_14576_1198617352_2--
Message 19
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| Subject: | Re: How do you like your FireFly? |
Mike,
All of this has to do with your view point and frame of mind. But if you
look at the wing and power loading of light GA aircraft, you will find
examples and data that can be applied to the Kolb designs. My first flight
was in my uncle's Aeronca Champ 7A, and my brother flew a Piper Cub C-3.
Over the years about 10,000 Champs and 20,000 Cubs were produced. I consider
these two as bench mark GA aircraft and the number of pilots who were
trained in them must at least in the six figure region.
The gross weight power loading is:
Cub 18.75 lbs/hp
Champ 18.77 lbs/hp
The gross weight wing loading is:
Cub 6.84 lbs/sq ft
Champ 7.18 lbs/sq ft
FireFly 4.27 lbs/sq ft (500/117}
Dividing the FireFly gross weight by 18.76 indicates that the FireFly will
match their power loading with only 26.7 hp. In comparison anything below
this may be considered under powered or substandard. With 27 hp the FireFly
will out climb the Champ or Cub by at least 38%. This indicates that it is
not necessarily power but wing loading that is the most important factor
when it comes to an engine out. Just ask any glider pilot.
Fly smart and safe.
Jack B. Hart FF004
Winchester, IN
At 06:11 PM 12/21/07 -0800, you wrote:
>
...........................
>As far as engine, I would put a 503 on it, much more reliable an better
than the 447. As far as some that say its overpowered, those are guys that
have small engines and try to convince themselves that they made the correct
choice by having a small, sub standard engine... Nothing says you need to
fly around at high power all the time, but lots of power is a really great
thing to have when you need it. More power is also safer, will get you out
of trouble when you need it, you will get off the ground quicker, and on
takeoff you will also be a lot higher at the end of runway.. If the engine
quits on takeoff, you will have several hundred feet more altitude then they
poor guy with the small, very light engine.
>
>.............The only people I ever hear talk about some planes "having to
much power" are pilots of doggy, sluggish airplanes that are trying to
convince themselves that a lack of power is a good thing.
>
Message 20
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| Subject: | Re: Suzuki Bottom rail Attach |
NextPart_Webmail_9m3u9jl4l_10650_1198618659_2--
Message 21
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| Subject: | Engine damper mounts |
Rather than trying to tell some pimple factory what it is you want at the
Napa store, try McMaster Carr (McMaster.com) page 1318 top.
Rick
Message 22
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| Subject: | Re: Suzuki Bottom rail Attach |
Ron, You might want to consider welding compression tubes into your frame
rails so they don't collapse the rails when you torque down the engine
mounting bolts. The old mounts on my Mark III had rectangular tube spacers
without compression tubes and it was never possible to really tighten the
through bolts. The result was that all the pieces fretted against each
other.
Just a thought.
Rick
On Dec 25, 2007 3:37 PM, <neilsenrm@comcast.net> wrote:
> NextPart_Webmail_9m3u9jl4l_10650_1198618659_2--
>
>
Message 23
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| Subject: | Re: Suzuki Bottom rail Attach |
Ron,
Thanks for keeping us up to date on the Suzuki install, especially the
photos. I have always been very interested in automotove/motorcycle
engine conversions for aircraft. One comment I have, for what its
worth, is to be careful of stainless steel bolts in high stress
locations. Garden variety stainless bolts have about 1/3 the yield
strength and 60 percent of the tensile strength of Grade 5 fasteners.
In your application, it looks like you have the freedom to oversize the
bolts, so you could go with stainless but use larger sizes. Unless you
want to do a full stress analysis, I would look at applications with
similar stresses (eg. same engine weight) and then if using stainless,
go with bolt diameters two sizes larger than you would with a grade 5 or
8. Or you could go with high strength stainless like A286.
Dan G.
F2 Tucson
Ron wrote:
>As I mentioned earlier folks to those who are interested, here are some of the
missing pix of the bottom mount rails. All hardware is SS so after painting I
will never have rust streaks from the bolts. I need to now have the motor sit
on top of this and then adjust it to center and then drill for final placement.
In future if the motor need to be canted for whatever purpose it will be simple
to purchase the bottom Angles .25 6061 alum from Spruce and adjust as needed.
The angles are fairly inexpensive from spruce and they cut them to length
for you, I think its something under 5 bucks per foot. The rubber biscuits are
from NAPA for $2.50 each. Not expensive at all even for us on a budget. The
bolts that will fasten the whole thing together will be stainless as well and
fairly robust, I will make sure they fill the holes in the rubber donuts 5/16
comes to mind but ain't sure yet.
>Merry Christmas
>Ron
>Arizona
>
Message 24
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| Subject: | Re: Suzuki Bottom rail Attach |
Ok I found the receipt from NAPA, here is the number on the receipt
"602-1045 its noted as MR MOUNT" I think I have the boxes in the hanger trash,
so if that doesn't do it let me know and I'll fish out the boxes. I guess I ought
to document somewhere this stuff.. :-)
Now I am going to be using 8 of them, 4 on the bottom and 4 on top they are $2.9
each. Believe it or not Ace has pretty similar stuff to this, and the smell
test indicates that its very close to being the same rubber compound. However
Ace wants 4 bucks for each rubber donut.
Ron
Arizona
==============================
---- "herbgh@juno.com" <herbgh@juno.com> wrote:
============
Ron
Can you give me enough info on the Napa rubber biscuits to enable me to order
them or direct the Napa folks to the correct catalog..? I went this route once
before , but the local napa guy could not find them by description..Herb
_____________________________________________________________
Click here for free info on Graduate Degrees.
http://thirdpartyoffers.juno.com/TGL2111/fc/Ioyw6iifmxKZ7LBxWSEkZCC9uyTWxvFGYV7omnylT5lsnWAeq4JdrX/
--
kugelair.com
Message 25
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| Subject: | Re: Suzuki Bottom rail Attach |
Ron
Many thanks...I will give it a try tomorrow.. finding shock mounts , or rubber
that can be used as such has been difficult here in SE Ky..
;
I need some for replacement on my N3 Pup. I am told that Lord makes their shock
mounts of all types in Bowling Green Ky.. so close yet so far!! :-) Herb
so not archive
attach catchy phrase here: :-)
_____________________________________________________________
Click here to double your salary by becoming a medical transcriber.
http://thirdpartyoffers.juno.com/TGL2111/fc/Ioyw6iifev4iwLAdVhqgnBnxzT3ON1ISJZVFs4ReSvr3bcYcPSmRZL/
Message 26
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| Subject: | Re: Suzuki Bottom rail Attach |
I decided against any vertical drilling of the tubes. The hols will be through
the aluminum only and with just enough clearance to be able to tighten the nut
on the bottom side of the Angle, about 30% of the donut will rest directly above
the rail. the rest will be a bit outboard on the angle. As you can imagine
I spent quite a bit of time playing / thinking about it. This is as most Kolbs
are a prototype, and its built to be as robust and as simple as possible. I
already know of several different ways of making the mount, not necessarily better.
I do think that this for now is probably the least complicated way of doing
it. However all along I did not want to drill any holes in the rails, I finally
settled on 3 of .25 holes for the bolts through the middle of the rail
as you see in the pix. As that area is little stressed vertically and the angles
on top will transfer loads all along the rail. I did initially almost go and
do what you are proposing though.
Ron
Arizona
======================
---- Richard Girard <jindoguy@gmail.com> wrote:
============
Ron, You might want to consider welding compression tubes into your frame
rails so they don't collapse the rails when you torque down the engine
mounting bolts. The old mounts on my Mark III had rectangular tube spacers
without compression tubes and it was never possible to really tighten the
through bolts. The result was that all the pieces fretted against each
other.
Just a thought.
Rick
On Dec 25, 2007 3:37 PM, <neilsenrm@comcast.net> wrote:
> NextPart_Webmail_9m3u9jl4l_10650_1198618659_2--
>
>
--
kugelair.com
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| Subject: | Re: Suzuki Bottom rail Attach |
As you can imagine, :-)
I thought about that as well. The bottom rail bolts are in shear load mostly and
each .25 is rated iirc to min of 125000 psi. In other words .75 = .25 x 3 =.75
is worth about 93000 pounds per side. as I have two sides I think it looks
like I will need about 186000 lb of force to shear them. There is nothing on
the Kolb that will stay on if I am ever near any crash load like that including
me. The upper bolts will also be mostly in shear but they will need to transfer
force to a larger area via the rubber and the angles. So that's why they
are much bigger size for the top.
But will see, I may change everything right after the first time I fire the engine
up.
Ron
Arizona
======================
---- "Dan G." <azfirestar@cox.net> wrote:
============
Ron,
Thanks for keeping us up to date on the Suzuki install, especially the
photos. I have always been very interested in automotove/motorcycle
engine conversions for aircraft. One comment I have, for what its
worth, is to be careful of stainless steel bolts in high stress
locations. Garden variety stainless bolts have about 1/3 the yield
strength and 60 percent of the tensile strength of Grade 5 fasteners.
In your application, it looks like you have the freedom to oversize the
bolts, so you could go with stainless but use larger sizes. Unless you
want to do a full stress analysis, I would look at applications with
similar stresses (eg. same engine weight) and then if using stainless,
go with bolt diameters two sizes larger than you would with a grade 5 or
8. Or you could go with high strength stainless like A286.
Dan G.
F2 Tucson
Ron wrote:
>As I mentioned earlier folks to those who are interested, here are some of the
missing pix of the bottom mount rails. All hardware is SS so after painting I
will never have rust streaks from the bolts. I need to now have the motor sit
on top of this and then adjust it to center and then drill for final placement.
In future if the motor need to be canted for whatever purpose it will be simple
to purchase the bottom Angles .25 6061 alum from Spruce and adjust as needed.
The angles are fairly inexpensive from spruce and they cut them to length
for you, I think its something under 5 bucks per foot. The rubber biscuits are
from NAPA for $2.50 each. Not expensive at all even for us on a budget. The
bolts that will fasten the whole thing together will be stainless as well and
fairly robust, I will make sure they fill the holes in the rubber donuts 5/16
comes to mind but ain't sure yet.
>Merry Christmas
>Ron
>Arizona
>
--
kugelair.com
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| Subject: | Re: Any known Kolb in flight structural failures |
At 01:04 PM 12/25/2007, John H Murphy wrote:
>Has there ever been a reported structural failure of a Kolb in flight? The
>kind of structural failure such as a collapsed wing, struts, boom, cage or
>tail feathers?
Others could answer better than I, who've only been here about a year, but
since nobody else has responded, there are three I've heard of: An
Ultrastar deliberately tested to destruction at around 6 g's (the wing drag
strut failed, the pilot successfully deployed a parachute, and Kolb
subsequently strengthened that area), and two wing leading edge failures on
early Firestars that were also flown very hard (one pilot rode the chute
down and lived to tell about it, the other didn't.) Search the list
archives and you'll find the discussions.
-Dana
--
"640K of computer memory ought to be enough for anybody." - Bill Gates, 1981
Message 29
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| Subject: | Re: Any known Kolb in flight structural failures |
You have to be gentle with the flight controls if you use all Harbor
Fright hardware.
BB
do not archive
On 25, Dec 2007, at 7:54 PM, Dana Hague wrote:
>
> At 01:04 PM 12/25/2007, John H Murphy wrote:
>
>> Has there ever been a reported structural failure of a Kolb in
>> flight? The kind of structural failure such as a collapsed wing,
>> struts, boom, cage or tail feathers?
>
> Others could answer better than I, who've only been here about a
> year, but since nobody else has responded, there are three I've
> heard of: An Ultrastar deliberately tested to destruction at
> around 6 g's (the wing drag strut failed, the pilot successfully
> deployed a parachute, and Kolb subsequently strengthened that
> area), and two wing leading edge failures on early Firestars that
> were also flown very hard (one pilot rode the chute down and lived
> to tell about it, the other didn't.) Search the list archives and
> you'll find the discussions.
>
> -Dana
> --
> "640K of computer memory ought to be enough for anybody." - Bill
> Gates, 1981
>
>
Message 30
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| Subject: | Re: How do you like your FireFly? |
> I have a Firefly with a 503. I haven't flown one with a 447, but my airplane
always wants to pitch up and fly left (left wing very heavy). This is because
of the extra weight and torque of the 503. The trim tab on the left aileron is
already full up.
>
> I expected the 503 to climb out at 1500 fpm but it's more like 1000 fpm from
my home field (2500 msl).
>
> If I were to buy or build another Firefly, I would definitely use the 447. I
think the only thing I would miss on the 503 is the oil injection.
>
> To be 103 legal in the Firefly, you are limited to 2-bladed wood prop,small wheels,
no brakes, no or limited gages, 1 coat of paint, short windscreen.
>
> I have the short windscreen. It is very wind. I actually think it would be better
to take it off completely. The short windshield seems to put all the turbulent
air right at head.
>
> Mine has the gap seal removed (between wings). I am 6-01 and if it were there,
I think my head wouldn't fit in the airplane.
Virtually all modern sailplanes have flap/aileron interconnects that result in
the ailerons being at the same angle to the wing as the flaps. When you move
the ailerons, the flaps move right along with the ailerons Negative flaps (whole
flap/aileron system up) are used to change the wing camber to a more efficient
shape for high speed flight. I don't notice much trim change when going
between positive and negative flaps, but do notice a somewhat reduced roll rate
with negative flaps. I don't believe trimming the ailerons up and down is a
very efficient way to pitch trim a conventional aircraft. It does work well
with a flying wing.
Jim,
With your aircraft being tail heavy, you should first do a weight and balance to
check that the CG is within the recommended range. Aft CG out of the proper
range is dangerous. If the CG is not out of limits, the most efficient (from
a drag standpoint) way to trim it is to raise the front of the horizontal stabilizer
a bit.
You are degrading the efficiency of the wing by flying the aircraft without a gap
cover. Minimally, at least the top surface of the gap should be covered.
You might see that 1500 feet per minute rate of climb you expected with a gap
cover in place.
--------
Dave Bigelow
Kamuela, Hawaii
FS2, HKS 700E
Read this topic online here:
http://forums.matronics.com/viewtopic.php?p=154269#154269
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| Subject: | Re: Suzuki Bottom rail Attach |
Ron,
Now that I look at the numbers, I agree they look pretty good. I am
often guilty of over thinking things, but I believe it usually ends up
being for the best. The calc I did comes out differently but still
looks favorable. The minimum tensile strength I've seen for ordinary
304/347/316 is 75000 psi. Shear failures occur at 50 to 60 percent of
tensile strength, so I used 37500 psi. The shear area of a .25 inch
fastener is .049 sq-in, so the shear load each can handle is 37500 x
.049 = 1840 lbs. Still a big number. What has always concerned me
about ordinary ss bolts is their yield strength is only about 40 percent
of tensile. This means they can stretch and therefore loosen up at less
than half the rated tensile load. Probably like most of us, I am used
to being pretty conservative since real life is usually more complex
than the calcs assume. I am not familiar with iirc - does that mean
strain hardened? I see those are rated to 100 ksi yield and 125 ksi
tensile which is a very sturdy solution. Thanks for sharing the process
with us - we all learn a lot along the way.
Dan
Tucson
Ron wrote:
>
>As you can imagine, :-)
>I thought about that as well. The bottom rail bolts are in shear load mostly and
each .25 is rated iirc to min of 125000 psi. In other words .75 = .25 x 3 =.75
is worth about 93000 pounds per side. as I have two sides I think it looks
like I will need about 186000 lb of force to shear them. There is nothing on
the Kolb that will stay on if I am ever near any crash load like that including
me. The upper bolts will also be mostly in shear but they will need to transfer
force to a larger area via the rubber and the angles. So that's why they
are much bigger size for the top.
>But will see, I may change everything right after the first time I fire the engine
up.
>Ron
>Arizona
>
>
>
>
Message 32
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| Subject: | Re: How do you like your FireFly? |
In a message dated 12/24/2007 7:11:45 P.M. Eastern Standard Time,
orcabonita@hotmail.com writes:
Kolb says to adjust the flaps on the MK III to flat with the bottom of the
wing,
Make sure that when you measure this parameter that you are holding pressure
under each aileron to take the slack out, Also
Mike, keep in mind that the Kolb airfoil is not like most airfoils. It is
Homer's own Homebrewed shape. It has it's own personality, which is what most
Kolb Pilots appreciate.
I found on my Firefly that very minor changes in the aileron give
significant trim change. It is also different than your MkIIIX in that it tends
to
have almost no trim change from Splash Off to Splash On.
Steve B
Firefly 007/Floats
do not archive
**************************************See AOL's top rated recipes
(http://food.aol.com/top-rated-recipes?NCID=aoltop00030000000004)
Message 33
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| Subject: | Re: Any known Kolb in flight structural failures |
There was a recent case on a MK III where the front of the tail attach point fatigued,
cracked, and failed in flight. The front of one side of the horizontal
stabilizer went straight up, and jammed against the tail wire, being flat into
the wind. The rest of the tail stayed together and the pilot flew it to a
safe landing under control.
I also read of a very old case where a guy flew a MK II in Canada in very extreme
turbulence, and a weld on the rear wing attach failed. The quality of the
welding was fixed many years ago according to the article.
As far as structure, the Kolbs have a very good structrual record compared to most
other airplanes of its class. Except for the first case with the tail, Almost
every failure ever recorded was caused by abuse far in excess for which the
planes were designed. Aerobatics, etc. etc... Kolbs have a good reputation
for being strong planes.
Mike
--------
"NO FEAR" - If you have no fear you did not go as fast as you could
have !!!
Kolb MK-III Xtra, 912-S
Read this topic online here:
http://forums.matronics.com/viewtopic.php?p=154276#154276
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| Subject: | Re: Wire Label Printer |
Lar,
Here's a link to a site with many different model? Might want to check it out.
jerb
http://www.google.com/products?hl=en&q=rhino+label+printer&um=1&ie=UTF-8
At 10:36 AM 12/25/2007, you wrote:
>Thanks ! ! ! I took one look at this and forwarded it to my work
>email. My guys can really use that. Merry Christmas ! !
>! Lar. Do not Archive.
>
>jerb wrote:
>>Hey Folks,
>>Some of you have been looking for in-expensive wire/cable label
>>printer. Happen to see the Lowe's in my area has a Rhino Label
>>Printer for printing wire labels. It's around $49 for the printer,
>>label tape is addition. You'll find it in the electrical
>>dept. This is what they call an In/Out item meaning it is not a
>>regular carried item and will not be on their web site. A great
>>Christmas gift for yourself (always get what you want that
>>way)... If you need their item number, let me know.
>>jerb
>>
>>
>>
>>href="http://www.matronics.com/contribution">http://www.matronics.com/contribution
>>
>>href="http://www.matronics.com/Navigator?Kolb-List">http://www.matronics.com/Navigator?Kolb-List
>> href="http://forums.matronics.com">http://forums.matronics.com
>>
>
>
><http://www.matronics.com/contribution>http://www.matronics.com/contribution
><http://www.matronics.com/Navigator?Kolb-List>http://www.matronics.com/Navigator?Kolb-List
>
Message 35
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| Subject: | Re: How do you like your FireFly? |
Dave,
You may need to adjust the alignment of your engine to compensate for
the torque factor it produces - how's it do on pitch when your at
cruise power, do you have to hold back stick or forward pressure - if
you have had to add a major trim tag to your elevator to compensate
for stick forces for nose up or nose heavy condition you might want
to adjust the engines angle front to rear by shinning using large
fender washers. I recall which way it has to be changed for each,
got to think on that a bit - had to do that on my Hawk. Ya, I some
what agree with you about the short windscreen - it seems like it
directs it right at your face and throat area. We applied silver to
top and bottom of the wings and extra coat to top of all surfaces -
you probably will not apply the top coat to the point of getting the
glossy look if your trying to make the weight.
jerb
At 08:11 PM 12/25/2007, you wrote:
>
>
> > I have a Firefly with a 503. I haven't flown one with a 447, but
> my airplane always wants to pitch up and fly left (left wing very
> heavy). This is because of the extra weight and torque of the 503.
> The trim tab on the left aileron is already full up.
> >
> > I expected the 503 to climb out at 1500 fpm but it's more like
> 1000 fpm from my home field (2500 msl).
> >
> > If I were to buy or build another Firefly, I would definitely use
> the 447. I think the only thing I would miss on the 503 is the oil injection.
> >
> > To be 103 legal in the Firefly, you are limited to 2-bladed wood
> prop,small wheels, no brakes, no or limited gages, 1 coat of paint,
> short windscreen.
> >
> > I have the short windscreen. It is very wind. I actually think it
> would be better to take it off completely. The short windshield
> seems to put all the turbulent air right at head.
> >
> > Mine has the gap seal removed (between wings). I am 6-01 and if
> it were there, I think my head wouldn't fit in the airplane.
>
>
>Virtually all modern sailplanes have flap/aileron interconnects that
>result in the ailerons being at the same angle to the wing as the
>flaps. When you move the ailerons, the flaps move right along with
>the ailerons Negative flaps (whole flap/aileron system up) are used
>to change the wing camber to a more efficient shape for high speed
>flight. I don't notice much trim change when going between positive
>and negative flaps, but do notice a somewhat reduced roll rate with
>negative flaps. I don't believe trimming the ailerons up and down
>is a very efficient way to pitch trim a conventional aircraft. It
>does work well with a flying wing.
>
>Jim,
>With your aircraft being tail heavy, you should first do a weight
>and balance to check that the CG is within the recommended
>range. Aft CG out of the proper range is dangerous. If the CG is
>not out of limits, the most efficient (from a drag standpoint) way
>to trim it is to raise the front of the horizontal stabilizer a bit.
>
>You are degrading the efficiency of the wing by flying the aircraft
>without a gap cover. Minimally, at least the top surface of the gap
>should be covered. You might see that 1500 feet per minute rate of
>climb you expected with a gap cover in place.
>
>--------
>Dave Bigelow
>Kamuela, Hawaii
>FS2, HKS 700E
>
>
>Read this topic online here:
>
>http://forums.matronics.com/viewtopic.php?p=154269#154269
>
>
Message 36
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| Subject: | Re: How do you like your FireFly? |
One thing I would do if I were to build another and that is reduce
the cord of the flaps and ailerons - see comments made by Jack
Hart. It is a little sensitive on the roll control to the point
where you almost fighting your self.
Regarding the wheels and tires on the FireFly see comment posted by
Guy Morgan 02 Aug 2004 16:26, he covers what he did regarding the tires.
jerb
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