Today's Message Index:
----------------------
1. 07:33 AM - 912 Repair Class (Kirby Dennis Contr ASC/TM)
2. 07:55 AM - Balance Master (Richard Pike)
3. 08:43 AM - Re: Balance Master (Terry)
4. 09:03 AM - Northeast Fly-in (Terry)
5. 09:34 AM - Re: 912 Repair Class (Paul Petty)
6. 04:55 PM - mod weight (Paul Petty)
7. 05:41 PM - Re: mod weight (Don Gherardini)
8. 05:49 PM - Re: mod weight (Bob N.)
9. 05:55 PM - Re: Balance Master (Earl & Mim Zimmerman)
10. 07:24 PM - Re: mod weight (Christopher Armstrong)
11. 07:55 PM - Re: Balance Master (Richard Pike)
12. 08:51 PM - Re: mod weight (Paul Petty)
Message 1
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| Subject: | 912 Repair Class |
--> Kolb-List message posted by: Kirby Dennis Contr ASC/TM <Dennis.Kirby@kirtland.af.mil>
Paul P. -
Thanks for the history & insight into the Rotax 912 engine!
I'm sure most will agree with you that the 912 is likely one of the most
reliable and proven light aircraft engines available, cost notwithstanding.
I, too, wanted a 912 for my Mark-III when it was ready for engine
installation, but I ended up with a different engine purely for cost
reasons. To save up the extra bucks for a 912 would have delayed my
airplane completion for another year or so, and I did not want to wait. So
I went with the Verner instead. We all make choices.
I'm happy with the Verner, and it's got plenty of power to push my Kolb
around the sky, but the 912 has a better (and well-deserved) reputation.
You should be pleased that you made a good choice for powering your Kolbra!
Dennis Kirby
Mark-3, Verner-1400, Powerfin in
Cedar Crest, NM
do not archive
Message 2
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--> Kolb-List message posted by: Richard Pike <rwpike@charter.net>
Anybody have any experience with using a Balance Master dynamic balancer on
the crank of a Rotax?
Richard Pike
MKIII N420P (420ldPoops)
Message 3
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| Subject: | Re: Balance Master |
--> Kolb-List message posted by: Terry <tkrolfe@usadatanet.net>
Richard Pike wrote:
> --> Kolb-List message posted by: Richard Pike <rwpike@charter.net>
>
> Anybody have any experience with using a Balance Master dynamic balancer on
> the crank of a Rotax?
>
> Richard Pike
> MKIII N420P (420ldPoops)
>
>
Richard,
Put one on my 447 on my FireFly last year. Didn't notice any big improvement,
but I fell it's more smooth than before. That's a subjective analysis having
no instrumentation to verify. Did so after reading that Rotax was including
this feature on some of their engines. I now have one on the prop and the one
on the magneto end as well. Works for me!
Terry - FireFly #95
Message 4
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| Subject: | Northeast Fly-in |
--> Kolb-List message posted by: Terry <tkrolfe@usadatanet.net>
I talked to Homer this morning about being able to have a fly-in at
his farm on Fathers Day. Told him that a bunch of Kolbers would like
to fly in and pay their respects. He said that he though that would
be a neat thing to have happen and that he doesn't have anything
scheduled for that day. I also asked that if the weather looks bad
for that day if we could do it that Saturday instead. He said that
would be OK also. He would love to meet you guys and see your
planes. I discussed landing and takeoff protocol and he mentioned the
church at the west end of his runway. We can get into more of that as
we get closer to that time.
I'm also getting in touch with the Mason- Dixon UL Club to see what
their schedule is for the fly-in at Wellsville. I know they have
planned events each day and we would need to schedule our arrivals
around those. Also will find out if they are still observing a left
hand right hand pattern. Again more later when these are known.
Just wanted you all to know that it looks like we have an event in the
makings. As I learn more I will keep you posted.
Terry - FireFly #95
Message 5
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| Subject: | Re: 912 Repair Class |
required 4.6, BAYES_00 -4.90)
--> Kolb-List message posted by: "Paul Petty" <lynnp@c-gate.net>
Dennis, My choice to go with the 912 was because I got lucky and found a
deal on one:-) Otherwise I to would have went the Verner route due to the
cost factor.
pp
do not archive
----- Original Message -----
From: "Kirby Dennis Contr ASC/TM" <Dennis.Kirby@kirtland.af.mil>
Subject: Kolb-List: 912 Repair Class
> --> Kolb-List message posted by: Kirby Dennis Contr ASC/TM
<Dennis.Kirby@kirtland.af.mil>
>
> Paul P. -
>
> Thanks for the history & insight into the Rotax 912 engine!
> I'm sure most will agree with you that the 912 is likely one of the most
> reliable and proven light aircraft engines available, cost
notwithstanding.
>
> I, too, wanted a 912 for my Mark-III when it was ready for engine
> installation, but I ended up with a different engine purely for cost
> reasons. To save up the extra bucks for a 912 would have delayed my
> airplane completion for another year or so, and I did not want to wait.
So
> I went with the Verner instead. We all make choices.
>
> I'm happy with the Verner, and it's got plenty of power to push my Kolb
> around the sky, but the 912 has a better (and well-deserved) reputation.
> You should be pleased that you made a good choice for powering your
Kolbra!
>
> Dennis Kirby
> Mark-3, Verner-1400, Powerfin in
> Cedar Crest, NM
> do not archive
>
>
Message 6
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--> Kolb-List message posted by: "Paul Petty" <Lynnp@c-gate.net>
Kolbers,
I weighed the 26 pieces of angle that make up the wing mod and they weigh 1768.2
grams or 3.898 lbs if my conversion is correct. That's just a tad more than
a gallon of gas for the total mod.
I'm all rested up from the Rotax school and ready to start wing 2 tonight!!
Paul Petty
Building Ms. Dixie
Kolbra/912UL/Warp
do not archive
Message 7
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MARKETING_SUBJECT
--> Kolb-List message posted by: "Don Gherardini" <donghe@one-eleven.net>
Paul......Gasoline weighs between 5.8 and 6.5 lbs per gallon....temp and
additives vary this...but a good average to figure is 6.25lbs/gal
do not archive
Don
Message 8
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--> Kolb-List message posted by: "Bob N." <ronoy@shentel.net>
Maybe he's gonna put the mod on Both wings!
Bob N.
Message 9
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| Subject: | Re: Balance Master |
--> Kolb-List message posted by: Earl & Mim Zimmerman <emzi@supernet.com>
Richard Pike wrote:
> --> Kolb-List message posted by: Richard Pike <rwpike@charter.net>
>
> Anybody have any experience with using a Balance Master dynamic balancer on
> the crank of a Rotax?
Richard,
If you have a newer 582 it may already have one installed from rotax. If
you look on the parts breakdown for the magneto it is Ref.#16 part #
965-497. -- Earl
Message 10
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MARKETING_SUBJECT
--> Kolb-List message posted by: "Christopher Armstrong" <tophera@centurytel.net>
I don't think that the mod you made was an efficient structural addition.
What was the point of the addition? To stiffen the ribs front to rear? To
increase the bending strength of the rib chordwise?
You have added 6 pounds of aluminum angle and a 1/4 pound or so of rivets
that are very ineffective at strengthening in the directions that the ribs
carry loads in your wing while putting a bunch of holes in you rib tubing
weakening it.
To strengthen the structure efficiently you need to add the material exactly
where it is needed and carry that new load path from the source load all the
way back to the wing hard points.
I think it is possible that this mod has weakened the structure in someways
more then it strengthened it in others.
Your statement that it is only the weight of a gallon of gas is also
confusing. This is 10 percent of your fuel load, 10 percent of your range,
or a reduction in your rate of climb, longer takeoff and landings and a
small increase in stall speed. Not completely insignificant, especially if
you hit a tree on takeoff someday cause you are 6 pounds heavyer!
Kolbs flown responsibly don't have any significant history of structural
problems. What are you trying to improve on? If it ain't broke don't fix
it.
Just wondering
Topher
Message 11
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| Subject: | Re: Balance Master |
--> Kolb-List message posted by: Richard Pike <rwpike@charter.net>
It does. I was hoping to learn about one that actually did something about
the vibration. My 532 didn't have one, & it was much smoother...
Richard Pike
MKIII N420P (420ldPoops)
do not archive
At 08:55 PM 2/4/04 -0500, you wrote:
>--> Kolb-List message posted by: Earl & Mim Zimmerman <emzi@supernet.com>
>
>Richard Pike wrote:
>
> > --> Kolb-List message posted by: Richard Pike <rwpike@charter.net>
> >
> > Anybody have any experience with using a Balance Master dynamic
> balancer on
> > the crank of a Rotax?
>
>Richard,
>If you have a newer 582 it may already have one installed from rotax. If
>you look on the parts breakdown for the magneto it is Ref.#16 part #
>965-497. -- Earl
>
>
Message 12
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required 4.6, BAYES_00 -4.90)
--> Kolb-List message posted by: "Paul Petty" <Lynnp@c-gate.net>
Heck Chris, I haven't a clue, just a mod from an expert in this area and a
fellow that has been there done that sort of mod and proven it.... perhaps
the powers at be care to explain.
I'm a happy camper with the extra mods....
Paul Petty
Building Ms. Dixie
Kolbra/912UL/Warp
do not archive
-- Original Message -----
From: "Christopher Armstrong" <tophera@centurytel.net>
Subject: RE: Kolb-List: mod weight
> --> Kolb-List message posted by: "Christopher Armstrong"
<tophera@centurytel.net>
>
>
> I don't think that the mod you made was an efficient structural addition.
> What was the point of the addition? To stiffen the ribs front to rear?
To
> increase the bending strength of the rib chordwise?
>
> You have added 6 pounds of aluminum angle and a 1/4 pound or so of rivets
> that are very ineffective at strengthening in the directions that the ribs
> carry loads in your wing while putting a bunch of holes in you rib tubing
> weakening it.
>
> To strengthen the structure efficiently you need to add the material
exactly
> where it is needed and carry that new load path from the source load all
the
> way back to the wing hard points.
>
> I think it is possible that this mod has weakened the structure in
someways
> more then it strengthened it in others.
>
> Your statement that it is only the weight of a gallon of gas is also
> confusing. This is 10 percent of your fuel load, 10 percent of your
range,
> or a reduction in your rate of climb, longer takeoff and landings and a
> small increase in stall speed. Not completely insignificant, especially
if
> you hit a tree on takeoff someday cause you are 6 pounds heavyer!
>
> Kolbs flown responsibly don't have any significant history of structural
> problems. What are you trying to improve on? If it ain't broke don't fix
> it.
>
> Just wondering
>
> Topher
>
>
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