Today's Message Index:
----------------------
1. 06:42 AM - Re: Damaged tailboom (Thom Riddle)
2. 07:27 AM - fuselage interferance (Paul Petty)
3. 07:47 AM - Re: fuselage interferance (Bob Bean)
4. 08:23 AM - Re: fuselage interferance (Richard & Martha Neilsen)
5. 09:31 AM - Re: fuselage interferance (John Cooley)
6. 09:36 AM - Re: fuselage interferance (Don Gherardini)
7. 12:36 PM - Boomtube dimension requested (Fackler, Ken)
8. 12:38 PM - Re: Broken Kolb: fiberglass gear (Fackler, Ken)
9. 01:08 PM - Kolb Mark3s in Dallas area? (Aaron Hollingsworth)
10. 01:19 PM - Re: Broken Kolb: fiberglass gear (Larry Bourne)
11. 02:00 PM - Re: Flap Lever Retainer (John Hauck)
12. 02:19 PM - Re: I broke my Kolb (John Hauck)
13. 02:32 PM - Re: I broke my Kolb (Fackler, Ken)
14. 02:39 PM - Re: Broken Kolb: fiberglass gear (jerb)
15. 03:11 PM - Re: Boomtube dimension requested (John Hauck)
16. 03:27 PM - Re: Kolb Mark3s in Dallas area? (Dave & Eve Pelletier)
17. 05:19 PM - Tom and Betty Kuffel (John Hauck)
18. 08:06 PM - oil injection for 503 (Scott Olendorf)
19. 08:16 PM - Re: oil injection for 503 (Giovanni Day)
20. 08:39 PM - Re: Boomtube dimension requested (John Cooley)
21. 08:55 PM - Re: oil injection for 503 (John Cooley)
Message 1
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| Subject: | Re: Damaged tailboom |
--> Kolb-List message posted by: "Thom Riddle" <jtriddle@adelphia.net>
Kolbers,
I just copied the following from the CGS Hawk Yahoo Group concerning a fatal accident
resulting from a lost prop and damaged tail boom. It is long but worth the read.
Thom in Buffalo
To Whom it may concern,
The final report on the Pendergist incident is being drafted as we
speak. I have been working on this investigation since day one. While
I am not the principal investigator I have been involved in every facet
of the investigation. Some of what we found speaks to maintenance
issues. Some of what we found speaks to hardware issues. And some of
what we found speaks to design issues. Without outlining the entire
report, here are a few highlight that seem to be producing a lot of
confusion. The entire thing will be available from USUA in about 3 to
4 weeks.
The prop itself seems to be a well made product. It does have a metal
inlay leading edge, which does not seem to add strength so much as
protect the leading edge from nicks. It also makes it possible for it,
at cruise revolutions, to cut aluminum tubing very efficiently. The
prop did not chase the plane after separation. It dropped down and to
the rear. the first impact was a few inches aft of the prop arc and
the second (which did not penetrate the boom) was about 10 inches aft
of that.
While it is true that a post on Fly-UL says the bolts sheered, the guy
who wrote the post has never seen the bolts. He was reporting the
events of the Virginia Safety Seminar that occurred in march where we
provided a presentation of our preliminary results.
The bolts have been looked at by a number of people some of them are
metallurgists some of them are air-crash investigators. One of these
people was a failure analyst. His first comment was that this was a
classic example of vibration failure in tension, most probably caused
by too much torque, under a lot of vibration for too long. IE the bolt
did not sheer, it pulled apart. None of the other people who have
examined the bolts have disputed or questioned this opinion. Certainly
the loads imparted by the extension may have had some roll in this but
so did the length, metallurgy, size, and installation of the bolts
themselves.
Much has been made about the issue of recommending Boom shields.
First, we are not recommending anything. The FAA asked what would
might have prevented this accident from occurring that might be
relevant to sport pilot. Boom shields were only one of a number of
recommendations offered in response to their inquiry.
I would strongly agree with Chuck's comment in this area. NOBODY
should just slap something on the boom without consulting with the
factory, or someone who understands the particulars of the airframe
involved. That said, a carefully designed shield need not increase,
shift, or focus the loads carried by the boom in adverse ways. It
might provide an inexpensive retrofit solution for existing aircraft
where someone has concerns about prop strike to the tail boom. And
finally, it is not any different that adding a BRS system in terms of
likelihood of need or use.
I know this will fire a lot of you up but so be it. But, if I had one
thing to suggest to all of you it would be this. Most of us carry a
GPS. Most of those units have a track-log capability. Turn it on and
leave it on when you fly. In the event of an incident it is almost a
good as a flight recorder for assisting in a determination of events
leading up to the crash. People who are flying in a group when an
incident occurs, should immediately turn OFF the track logs on their
unit to preserve the data concerning their relationship to the incident
aircraft.
In the Pendergist crash, the track-log was arguably the single most
valuable piece of data we had. It was possible to determine where the
prop separated and track the events of the flight up to the point where
the boom failed and the plane flipped upside down. At that point the
unit lost power and shut itself off preserving the log. In the absence
of a surviving pilot, it is the best source of flight information we
can have. The log also confirmed the eye witness statements.
Another thing that seems to be cropping up a lot. No one has sued the
manufacturer of the plane, prop, bolts or anything else. Rich
Pendergist carried insurance covering death or injury of any student.
He paid a lot for that coverage, and he expected it to pay in the event
of a problem. The widow of the student has filed a claim against that
policy. To date the insurance company has been less than responsive,
to put in mildly. The people who keep talking about law suits, lawyers
and how people are always looking for someone to blame and point to
this incident do not have a clue what is actually going on.
This woman is not looking for ANYONE to blame. She has lost her
husband in what she sees as a tragic accident. Because of Rich, anyone
who sat in the student seat of his airplane and died or was injured,
had a right to expect compensation for the loss. And Rich told people
that. Hell, he was proud of it. If that bothers anyone well that is
just too bad, get a life. As far as the rest of it, all she wants is
to work with anyone necessary to find a way to prevent this from ever
happening to anyone else.
One final point about parachute rescue systems. I keep hearing people
say they would "pull the handle" if this happened to them so any
shielding from a prop strike is unnecessary. It would appear in this
case that the boom failed at about 400 feet AGL. This would be near
the very lowest range for successful deployment. The plane was
operating well up to that point, and they were lined up on a good
field. They simply did not know the extent of the damage to the plane
or they would have pulled the ring. They had descended from 3000 feet
and if it had held together for 15 more seconds they would have been on
the ground.
In this case they never had a chance to deploy. When the boom failed
the plane inverted with significant speed and force. There is physical
evidence that both men were knocked unconscious at that moment. They
never had a chance.
From what we can tell the pilotage after separation of the prop was
impeccable until the plane stopped flying. The early reports by the
FAA concerning a departure stall were completely and utterly wrong.
That is where the typical FAA/NTSB investigation would have ended for
most UL incidents. I for one refuse to let these guys die without
something good coming from it. The lessons learned here might just
save someone's life someday. While this was a complex and somewhat
unusual situation I think we can learn from it and make our planes
safer.
Fly Safe
Phil
Message 2
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| Subject: | fuselage interferance |
--> Kolb-List message posted by: "Paul Petty" <Lynnp@c-gate.net>
Kolbers,
I was using the damaged tail boom last night to get a feel for how the mating of the tail section to the fuselage was going to go. I have had a suspicion that the boom was not going to clear one of the frame member and turns out it will not. http://www.c-gate.net/~ppetty/photos/P5010025.JPG Did any other Kolbra builders run into this? If so what did you do about it? My thinking is to cut the member out leaving a stub on the longeron and bend a part and sleeve it in.
Paul Petty
Building Ms. Dixie
Kolbra/912UL/Warp
do not archive
Message 3
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| Subject: | Re: fuselage interferance |
--> Kolb-List message posted by: Bob Bean <slyck@frontiernet.net>
Paul, do you have an idea as to whether the ring is where it should be?
If so, sure, reroute that offending tube a little. Even so, I'm surprised
at the obvious interference. -BB do not archive
Paul Petty wrote:
>--> Kolb-List message posted by: "Paul Petty" <Lynnp@c-gate.net>
>
>Kolbers,
>I was using the damaged tail boom last night to get a feel for how the mating of the tail section to the fuselage was going to go. I have had a suspicion that the boom was not going to clear one of the frame member and turns out it will not. http://www.c-gate.net/~ppetty/photos/P5010025.JPG Did any other Kolbra builders run into this? If so what did you do about it? My thinking is to cut the member out leaving a stub on the longeron and bend a part and sleeve it in.
>
>Paul Petty
>Building Ms. Dixie
>Kolbra/912UL/Warp
>
>
>do not archive
>
>
>
>
Message 4
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| Subject: | Re: fuselage interferance |
--> Kolb-List message posted by: "Richard & Martha Neilsen" <NeilsenRM@comcast.net>
This isn't right. Looks like it's time to call Kolb. Don't just assume that
you can cut the tube bend then sleeve. You don't know what it would do to
the strength of the cage.
Rick Neilsen
Redrive VW powered MKIIIc
----- Original Message -----
From: "Paul Petty" <Lynnp@c-gate.net>
Subject: Kolb-List: fuselage interferance
> --> Kolb-List message posted by: "Paul Petty" <Lynnp@c-gate.net>
>
> Kolbers,
> I was using the damaged tail boom last night to get a feel for how the
mating of the tail section to the fuselage was going to go. I have had a
suspicion that the boom was not going to clear one of the frame member and
turns out it will not. http://www.c-gate.net/~ppetty/photos/P5010025.JPG Did
any other Kolbra builders run into this? If so what did you do about it? My
thinking is to cut the member out leaving a stub on the longeron and bend a
part and sleeve it in.
>
> Paul Petty
> Building Ms. Dixie
> Kolbra/912UL/Warp
>
>
> do not archive
>
>
Message 5
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| Subject: | fuselage interferance |
--> Kolb-List message posted by: "John Cooley" <johnc@datasync.com>
Paul,
I would consult with Kolb on that one. It appears that either the ring
is too low or the cross brace is installed two far back (if the cross
brace was located more toward he gear leg sockets the boom tube would
clear it, I think) but in either case you need to get a definite answer
from Kolb, then you can fix it with your new Tig welding machine!
Have Fun,
John Cooley
Do not archive
-----Original Message-----
From: owner-kolb-list-server@matronics.com
[mailto:owner-kolb-list-server@matronics.com] On Behalf Of Paul Petty
Subject: Kolb-List: fuselage interferance
--> Kolb-List message posted by: "Paul Petty" <Lynnp@c-gate.net>
Kolbers,
I was using the damaged tail boom last night to get a feel for how the
mating of the tail section to the fuselage was going to go. I have had a
suspicion that the boom was not going to clear one of the frame member
and turns out it will not.
http://www.c-gate.net/~ppetty/photos/P5010025.JPG Did any other Kolbra
builders run into this? If so what did you do about it? My thinking is
to cut the member out leaving a stub on the longeron and bend a part and
sleeve it in.
Paul Petty
Building Ms. Dixie
Kolbra/912UL/Warp
do not archive
==
direct advertising on the Matronics Forums.
==
==
==
Message 6
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| Subject: | Re: fuselage interferance |
--> Kolb-List message posted by: "Don Gherardini" <donghe@one-eleven.net>
Paul,
I just looked at that pic..hmmmm....makes me very suspicious.
Now, I dont think that if you cut out that cross brace, and made a new one
with a bow in it you would inhibit the strength of the cage to any great
degree...but....as Bean mentioned, I would be more concerned that someone at
Kolb had that sucker in the jig wrong, and I would be worried that the rings
are in the right places ...front ring might be too low...rear ring....who
knows..but either way, a ring being set wrong in the jig as they were
welding it up would make the boom set at the wrong angle vs the wings....and
that would be a major concern I think.
Like Neilsen said....Time to call Kolb!
Give Brian Hell, this oughtta be worth a few free parts!....treat him just
like you would the Hastings salesman or the Borg-Warner rep...
hehe...actually, I feel for him....crap like this happens to me at work all
the time!..just gotta make the client happy somehow..
Don Gherardini
FireFly 098
http://www.geocities.com/dagger369th/my_firefly.htm
DO NOT ARCHIVE
Message 7
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| Subject: | Boomtube dimension requested |
--> Kolb-List message posted by: "Fackler, Ken" <kfackler@ameritech.net>
Can anyone here on the list tell me definitively the correct thickness for
the boomtube on a Mark II?
Message 8
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| Subject: | Re: Broken Kolb: fiberglass gear |
--> Kolb-List message posted by: "Fackler, Ken" <kfackler@ameritech.net>
In discussing my mishap and looking at the sheared-off gear legs, a friend
of mine commented that he thought the new fiberglass legs appeared to be
lighter and possibly of a lower strength than the old ones. I, not knowing
fecal matter from Shinola, always thought that "fiberglass was fiberglass"
and that therefore an equivalent thickness was all that's required.
Does anyone here have any information on whether fiberglass does indeed come
in "strengths" or "ratings" of some kind and, hopefully, where to find the
"right" kind to replace my gear legs? I'd need two three-foot lengths of
1.25" diameter rods.
Message 9
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| Subject: | Kolb Mark3s in Dallas area? |
--> Kolb-List message posted by: "Aaron Hollingsworth" <aaron@gamespeak.com>
Hello,
I just completed the sale of my Mark3 to a gentleman from the Dallas area. I
thought I would drop a note on here and see if there are any Mark3 owners in
his area. I'd like to help find someone in his area that could help him get
a bit of time in type. He has plenty of flight exp to make it an easy
transition. Regards to all. Also, when is Monument Valley? I'd like to
forward the details to him.
Aaron
--
DNA
Message 10
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| Subject: | Re: Broken Kolb: fiberglass gear |
--> Kolb-List message posted by: "Larry Bourne" <biglar@gogittum.com>
Right off the top, there's S-glass and E-glass, polyester resins, epoxy
resins, vinylester resins..............on and on, and all called
"fiberglass." Different formulations of each for different applications and
so on. Some are air cured, some heat (oven) cured.............complex.
Lar.
Larry Bourne
Palm Springs, CA
Building Kolb Mk III
N78LB Vamoose
www.gogittum.com
----- Original Message -----
From: "Fackler, Ken" <kfackler@ameritech.net>
Subject: Re: Kolb-List: Broken Kolb: fiberglass gear
> --> Kolb-List message posted by: "Fackler, Ken" <kfackler@ameritech.net>
>
> In discussing my mishap and looking at the sheared-off gear legs, a friend
> of mine commented that he thought the new fiberglass legs appeared to be
> lighter and possibly of a lower strength than the old ones. I, not knowing
> fecal matter from Shinola, always thought that "fiberglass was fiberglass"
> and that therefore an equivalent thickness was all that's required.
>
> Does anyone here have any information on whether fiberglass does indeed
come
> in "strengths" or "ratings" of some kind and, hopefully, where to find the
> "right" kind to replace my gear legs? I'd need two three-foot lengths of
> 1.25" diameter rods.
>
>
Message 11
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| Subject: | Re: Flap Lever Retainer |
--> Kolb-List message posted by: "John Hauck" <jhauck@elmore.rr.com>
| My flap handle keeps popping out of position. The detent notches
don't seem
| to keep the flap handle in place securely enough. Any
recommendations to
| fix this?
Hi Dennis K/All:
I think most of the MKIIIs I have been involved with had similar
problem, especially mine.
Remedy, which has lasted many hours, use a 5/32" chain saw file to
make a few paces over the tab that holds the lever in each position.
Keep the file snug up to the vertical strap while making the slight
notch.
john h
PS: Sorry for the delay in responding. Been out of town and just
returned.
Message 12
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| Subject: | Re: I broke my Kolb |
--> Kolb-List message posted by: "John Hauck" <jhauck@elmore.rr.com>
| There are two "creases" in the top of the tube, obviously just under
the prop arc. Neither one punctured the metal. The smaller is
approximately 2" long and 1/8" deep. The larger is 2.5" farther after
and is approximately 3.5" long and 1/4" deep.
|
| As you all know MUCH better than I, replacing the boom tube is Very
Big Job. What only a few of you know is that I am Very Poorly
Qualified or Equipped to do such a job. Some of those who helped me
rescue the bird this evening suggested that a sleeve repair might be
attempted.
Hi Ken/Gang:
Based on your info above, if it was my airplane I would replace the
boom tube. I think you are flying a MKII with a 5" boom???
I can speak from experience on tail boom replacement. I have replaced
the tail boom in my MK III twice. Now on the third tail boom counting
the original.
Snapped off the 6" tail boom at aft end of "H" brace in 1992 during
testing. Replaced during rebuild.
Collected a dual 582 K&N aircleaner and three GSC wooden prop blades
on the "H" brace at WOT Sep 1993. Replaced the tail boom.
Yes, it is a pain in the ass to change out. However, it is an
extremely essential part of the airplane. It is not an impossible job
to do. Just takes a little time and patience. May have to cut a
little fabric to work through on the nose of the tail boom, but that
is simple enough to repair.
Contact Bryan Melborne at Kolb. Ask him if he has a "second" tail
boom you can buy. He will probably sell it to you much cheaper than
one that is in good enough shape to send out with a new kit. Tell him
I sent you. It may help a dollar or two. Won't hurt to try.
Splicing a tail boom anywhere, in my humble opinion, is not wise.
Splicing a tailboom in the area of the "H" brace is dumb and extremely
hazzardous.
I am flying with "seconds" for wing spars and tail boom. In addition
to the dimples that came along with my "second" 6" tubes, I have also
added a few. One during my last few seconds of crashing at Muncho
Lake, B\C, four years ago. Tailboom swung around and knocked down a
good size elder. In the process put a few more dent in it. Seems to
be serviceable and holding up well.
Take care,
john h
Message 13
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| Subject: | Re: I broke my Kolb |
--> Kolb-List message posted by: "Fackler, Ken" <kfackler@ameritech.net>
Thank you, John!! As always, your posts offer both advice and encouragement
to those of us less experienced than you. But then, I guess that's just
about everyone, isn't it? ;-) No age pun intended, sir, just an
observation that you've got the hours to have earned the right to be
listened to.
-Ken
----- Original Message -----
From: "John Hauck" <jhauck@elmore.rr.com>
Subject: Re: Kolb-List: I broke my Kolb
> --> Kolb-List message posted by: "John Hauck" <jhauck@elmore.rr.com>
>
>
> the prop arc. Neither one punctured the metal. The smaller is
> approximately 2" long and 1/8" deep. The larger is 2.5" farther after
> and is approximately 3.5" long and 1/4" deep.
> Big Job. What only a few of you know is that I am Very Poorly
> Qualified or Equipped to do such a job. Some of those who helped me
> rescue the bird this evening suggested that a sleeve repair might be
> attempted.
> | -Ken Fackler
>
> Hi Ken/Gang:
>
> Based on your info above, if it was my airplane I would replace the
> boom tube. I think you are flying a MKII with a 5" boom???
>
> I can speak from experience on tail boom replacement. I have replaced
> the tail boom in my MK III twice. Now on the third tail boom counting
> the original.
>
> Snapped off the 6" tail boom at aft end of "H" brace in 1992 during
> testing. Replaced during rebuild.
>
> Collected a dual 582 K&N aircleaner and three GSC wooden prop blades
> on the "H" brace at WOT Sep 1993. Replaced the tail boom.
>
> Yes, it is a pain in the ass to change out. However, it is an
> extremely essential part of the airplane. It is not an impossible job
> to do. Just takes a little time and patience. May have to cut a
> little fabric to work through on the nose of the tail boom, but that
> is simple enough to repair.
>
> Contact Bryan Melborne at Kolb. Ask him if he has a "second" tail
> boom you can buy. He will probably sell it to you much cheaper than
> one that is in good enough shape to send out with a new kit. Tell him
> I sent you. It may help a dollar or two. Won't hurt to try.
>
> Splicing a tail boom anywhere, in my humble opinion, is not wise.
> Splicing a tailboom in the area of the "H" brace is dumb and extremely
> hazzardous.
>
> I am flying with "seconds" for wing spars and tail boom. In addition
> to the dimples that came along with my "second" 6" tubes, I have also
> added a few. One during my last few seconds of crashing at Muncho
> Lake, B\C, four years ago. Tailboom swung around and knocked down a
> good size elder. In the process put a few more dent in it. Seems to
> be serviceable and holding up well.
>
> Take care,
>
> john h
>
>
Message 14
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| Subject: | Re: Broken Kolb: fiberglass gear |
--> Kolb-List message posted by: jerb <ulflyer@verizon.net>
To be truthful in the past unless the new Kolb Company has changed, I found
them to be reasonable on the price of their aluminum legs, wouldn't think
they would be any different. It also keeps them in business for when you
need something later. Sounds like it took a pretty hard hit if you sheared
off your gear legs. As a precaution I think you need to take a "close"
look at the cage to make sure you haven't bent it or cracked an welds in
the members supporting the gear leg sockets. .
jerb
At 03:35 PM 5/2/04 -0400, you wrote:
>--> Kolb-List message posted by: "Fackler, Ken" <kfackler@ameritech.net>
>
>In discussing my mishap and looking at the sheared-off gear legs, a friend
>of mine commented that he thought the new fiberglass legs appeared to be
>lighter and possibly of a lower strength than the old ones. I, not knowing
>fecal matter from Shinola, always thought that "fiberglass was fiberglass"
>and that therefore an equivalent thickness was all that's required.
>
>Does anyone here have any information on whether fiberglass does indeed come
>in "strengths" or "ratings" of some kind and, hopefully, where to find the
>"right" kind to replace my gear legs? I'd need two three-foot lengths of
>1.25" diameter rods.
>
>
Message 15
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| Subject: | Re: Boomtube dimension requested |
--> Kolb-List message posted by: "John Hauck" <jhauck@elmore.rr.com>
Ken/All:
I went downstairs, put the micrometer on all my scrape tail boom and
main spar pieces. Some are .063 and some are 058". Can't go wrong
with either. If I had my choice, I would go with .063". If not, I,
personably, would fly with either.
john h
PS: Those "drops" are from FS, US, and MKIII tubes.
----- Original Message -----
From: "Fackler, Ken" <kfackler@ameritech.net>
Subject: Kolb-List: Boomtube dimension requested
| --> Kolb-List message posted by: "Fackler, Ken"
<kfackler@ameritech.net>
|
| Can anyone here on the list tell me definitively the correct
thickness for
| the boomtube on a Mark II?
|
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Message 16
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| Subject: | Re: Kolb Mark3s in Dallas area? |
--> Kolb-List message posted by: "Dave & Eve Pelletier" <pelletier@cableone.net>
Monument Valley is the 14th through the 16th of this month.
AzDave
----- Original Message -----
From: "Aaron Hollingsworth" <aaron@gamespeak.com>
Subject: Kolb-List: Kolb Mark3s in Dallas area?
> --> Kolb-List message posted by: "Aaron Hollingsworth"
<aaron@gamespeak.com>
>
> Hello,
>
>
> I just completed the sale of my Mark3 to a gentleman from the Dallas area.
I
> thought I would drop a note on here and see if there are any Mark3 owners
in
> his area. I'd like to help find someone in his area that could help him
get
> a bit of time in type. He has plenty of flight exp to make it an easy
> transition. Regards to all. Also, when is Monument Valley? I'd like to
> forward the details to him.
>
>
> Aaron
>
>
> --
>
> DNA
>
>
Message 17
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| Subject: | Tom and Betty Kuffel |
--> Kolb-List message posted by: "John Hauck" <jhauck@elmore.rr.com>
Hi Gang:
Just got off the phone with Betty Kuffel. She got home from the
hospital two days ago. Tom is still in Missoula, St Patricks
Hospital, and hopes to get home in a few days.
Betty still has a wonderful attitude and passes on that Tom is working
hard on getting into shape to return home.
Take care,
john h
DO NOT ARCHIVE
Message 18
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| Subject: | oil injection for 503 |
--> Kolb-List message posted by: "Scott Olendorf" <solendor@nycap.rr.com>
Does anyone have an oil injection unit for a 503 laying around. It seems like
most people remove them right away. Mike Alexander is looking for one to put
on his new Firestar. Mike is also looking to convert his 2 carb 503 to a single
carb. He will consider a trade of a practically new carb for the intake manifold
required.
Also what was the word on putting an oil injection on a 447? I may be interested
in doing that. How would it get calibrated to deliver the correct amount of
oil for a 447?
Scott Olendorf
Firestar, Rotax 447 and Powerfin prop.
Schenectady, NY
http://home.nycap.rr.com/firestar
Message 19
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| Subject: | oil injection for 503 |
--> Kolb-List message posted by: "Giovanni Day" <gde01@bellsouth.net>
Try Jim Hill at 1800-852-8756. Last I asked he had some.
Giovanni Day
Do Not Archive
"Does anyone have an oil injection unit for a 503 laying around. "
Message 20
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| Subject: | Boomtube dimension requested |
--> Kolb-List message posted by: "John Cooley" <johnc@datasync.com>
Ken,
You most likely can't get the thickness that originally came with the
Twinstar. My 91 model Twinstar and also my 94 model Firestar II used a
5" X .049 6061 tube. When I was building my Firestar in 1999 I had to
purchase a new set of plans. The new plans listed the size of the tube
as 5" x .052 6063. I called Kolb (at that time old Kolb) and was told
that the 5" x .049 was no longer made and the gentleman that I talked to
offered to swap some new ones for the old ones. Seems the old ones were
more desirable (lighter), in his mind anyway. I think he was actually
just trying to assure me the ones I had were fine. I believe that if you
order a new 5" tube from Kolb it will be the .052 6063 tube unless they
have changed again. Whatever they are using on the Firestar model is
what you want. Also I have the 1991 set of Twinstar plans, if you need
any info from them I would be glad to try and help.
On the gear legs you will have to replace them with the aluminum
Firestar II legs unless you know of a place you can get replacement
fiberglass legs. I personally would prefer the aluminum legs.
What year model is your Twinstar? I have had two Twinstar MK II's and
both had aluminum legs.
Later,
John Cooley
Do not archive
--> Kolb-List message posted by: "Fackler, Ken" <kfackler@ameritech.net>
Can anyone here on the list tell me definitively the correct thickness
for the boomtube on a Mark II?
Message 21
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| Subject: | oil injection for 503 |
--> Kolb-List message posted by: "John Cooley" <johnc@datasync.com>
Scott/Gang,
I have a oil injection unit that I purchased because I thought I was
getting a Rotax oil tank in the deal. Well, it was a Rotax tank ok, out
of a jet ski or snowmobile or something. Not what I wanted on my
airplane and I was pretty much stuck with it. The pump looks practically
new. If Mike is interested have him contact me off list and I will make
him a good deal.
On putting the oil injection on he 447, I believe you will have your
work cut out for you. I'm sure Tom O. or one of the other list guru's
will correct me if I'm wrong but I think I am right. The oil injection
model Rotax 503 crankshaft has a square slot in the front end of it that
a plastic shaft fits into. This plastic shaft has a gear on the end of
it and is what turns the oil pump. Since the crankshaft is turning the
oil pump it gives you the variable ratio depending on engine RPM.
Later,
John Cooley
Working on MK III for future Monument Valley trip.
Do not archive
-----Original Message-----
From: owner-kolb-list-server@matronics.com
[mailto:owner-kolb-list-server@matronics.com] On Behalf Of Scott
Olendorf
Subject: Kolb-List: oil injection for 503
--> Kolb-List message posted by: "Scott Olendorf"
--> <solendor@nycap.rr.com>
Does anyone have an oil injection unit for a 503 laying around. It
seems like most people remove them right away. Mike Alexander is
looking for one to put on his new Firestar. Mike is also looking to
convert his 2 carb 503 to a single carb. He will consider a trade of a
practically new carb for the intake manifold required.
Also what was the word on putting an oil injection on a 447? I may be
interested in doing that. How would it get calibrated to deliver the
correct amount of oil for a 447?
Scott Olendorf
Firestar, Rotax 447 and Powerfin prop.
Schenectady, NY
http://home.nycap.rr.com/firestar
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