Today's Message Index:
----------------------
1. 10:06 AM - Re: best props (jpfitt)
2. 11:16 AM - Re: best props (George Helton)
3. 12:34 PM - Re: best props (Larry Cottrell)
4. 12:38 PM - Fw: best props (Larry Cottrell)
5. 03:43 PM - Re: best props (Stuart Harner)
6. 03:48 PM - Re: best props (John Fitt)
7. 03:56 PM - Re: best props (John Fitt)
8. 04:03 PM - Re: best props (Larry Cottrell)
9. 04:12 PM - Re: best props (John Fitt)
Message 1
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I'm Very interested to hear about prop choices and initial settings with adjustable
pitch props. I am nearing completion of a FS II with a dcdi 503 ( 80 hrs
TT) compression good, easy start, carbs set for this location, no intake leaks....plugs
nice tan color.
warp drive 64" three blade, 2.58 B box initial set at 11 deg= max rpm 4800.
Re-pitched to 9.5 deg. = 5200 rpm. Re- pitch to 8.75 deg. But best rpm is 5800
rpm.
During tests tried enriching (choke) , moving jet needle, main jets. EGT around
950.
Brian at Kolb suggested initial prop setting of 12 deg. when I bought the prop
from him.
Can't believe that the prop should be set at this low degree.
John Fitt from Sebastopol, Ca
Sent from my iPad
> On Dec 29, 2017, at 5:44 PM, George Helton <gdhelton@gmail.com> wrote:
>
>
> Props are one of those things that require a lot of thought. Ive run two blade
wooden props. (Tennessee propeller) very good at matching prop to specific engines.
Real good composite leading edges are available. Reasonably priced.
> Ive run Ivoprops in both two and three blade configurations with good results,
very adjustable. They held up well in sandy and decomposed granite runway conditions.
The only downside was that theyre heavy and seem to take a little longer
to wind up. The blades do flex a lot and on some Kolb models require a prop
extension. Added cost.
> At the present time Im liking Powerfin propellers. Beautifully CNC machined hubs
and light very stiff composite blades. Ceramic leading edges are available.
Im sure theyd be great in really abrasive conditions. Extra cost though. They
come in two and three blade versions. They are expensive, but worth the it I
think.
> Warp Drives are really good looking props. They look really well made. Ive heard
that they are great propellers. Ive been told that theyre on the heavy side
too. But, thats hearsay. I have no experience with them, so I have no opinion.
> I think the two blade props are more efficient for around performance. But, I
like three blades simply because I like the climb power and smoothness. I think
that I will loose a little on cruise with a three blade. But, Im all about
takeoff and clearing trees up here. Just my input. Its worth what it cost you.
Just opinions. Have a great day! George
>
> George Helton
> 1986 Firestar, FS100
> 14GDH
> Mesick, Michigan
> gdhelton@gmail.com
>
> Do not archive
>
>
> Sent from my iPhone
>
>> On Dec 29, 2017, at 6:31 PM, japowell <japnmjp@twc.com> wrote:
>>
>>
>> I sent the 503 out for a zero time rebuild to Heaven Bound Aviation in Johnstown.
After looking at the prop, I found a few nicks and bruises on it and would
like to replace it. What is the best prop for the 503? I have researched
the achives and am still confused.
>>
>> Thanks.
>>
>> --------
>> Jim P
>> WAR EAGLE
>>
>>
>>
>>
>> Read this topic online here:
>>
>> http://forums.matronics.com/viewtopic.php?p=476873#476873
>>
>>
>>
>>
>>
>>
>>
>>
>>
>
>
>
>
Message 2
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Hi John, the only thing that I can see is that your EGT seems awfully low. It sounds
like the mixture is to rich at full power.
I use to use 6500 rpm as a maximum rpm. Rotax says 6800 rpm for that engine I believe.
EGT should run between 1000 to 1200F. To much oil in the fuel can also
contribute to low horsepower and low EGT reading. You will probably pickup 200
to maybe 400 rpm when you actually apply full power on takeoff inflight. Thats
my 2 cents. Just my opinions. Good luck! George
George Helton
1986 Firestar, FS 100
14GDH
Mesick, Michigan
Sent from my iPhone
> On Jan 6, 2018, at 1:06 PM, jpfitt <jpfitt@sbcglobal.net> wrote:
>
>
> I'm Very interested to hear about prop choices and initial settings with adjustable
pitch props. I am nearing completion of a FS II with a dcdi 503 ( 80 hrs
TT) compression good, easy start, carbs set for this location, no intake leaks....plugs
nice tan color.
> warp drive 64" three blade, 2.58 B box initial set at 11 deg= max rpm 4800.
> Re-pitched to 9.5 deg. = 5200 rpm. Re- pitch to 8.75 deg. But best rpm is 5800
rpm.
> During tests tried enriching (choke) , moving jet needle, main jets. EGT around
950.
> Brian at Kolb suggested initial prop setting of 12 deg. when I bought the prop
from him.
> Can't believe that the prop should be set at this low degree.
> John Fitt from Sebastopol, Ca
>
>
> Sent from my iPad
>
>> On Dec 29, 2017, at 5:44 PM, George Helton <gdhelton@gmail.com> wrote:
>>
>>
>> Props are one of those things that require a lot of thought. Ive run two blade
wooden props. (Tennessee propeller) very good at matching prop to specific
engines. Real good composite leading edges are available. Reasonably priced.
>> Ive run Ivoprops in both two and three blade configurations with good results,
very adjustable. They held up well in sandy and decomposed granite runway conditions.
The only downside was that theyre heavy and seem to take a little longer
to wind up. The blades do flex a lot and on some Kolb models require a prop
extension. Added cost.
>> At the present time Im liking Powerfin propellers. Beautifully CNC machined
hubs and light very stiff composite blades. Ceramic leading edges are available.
Im sure theyd be great in really abrasive conditions. Extra cost though. They
come in two and three blade versions. They are expensive, but worth the it
I think.
>> Warp Drives are really good looking props. They look really well made. Ive heard
that they are great propellers. Ive been told that theyre on the heavy side
too. But, thats hearsay. I have no experience with them, so I have no opinion.
>> I think the two blade props are more efficient for around performance. But,
I like three blades simply because I like the climb power and smoothness. I think
that I will loose a little on cruise with a three blade. But, Im all about
takeoff and clearing trees up here. Just my input. Its worth what it cost you.
Just opinions. Have a great day! George
>>
>> George Helton
>> 1986 Firestar, FS100
>> 14GDH
>> Mesick, Michigan
>> gdhelton@gmail.com
>>
>> Do not archive
>>
>>
>> Sent from my iPhone
>>
>>> On Dec 29, 2017, at 6:31 PM, japowell <japnmjp@twc.com> wrote:
>>>
>>>
>>> I sent the 503 out for a zero time rebuild to Heaven Bound Aviation in Johnstown.
After looking at the prop, I found a few nicks and bruises on it and would
like to replace it. What is the best prop for the 503? I have researched
the achives and am still confused.
>>>
>>> Thanks.
>>>
>>> --------
>>> Jim P
>>> WAR EAGLE
>>>
>>>
>>>
>>>
>>> Read this topic online here:
>>>
>>> http://forums.matronics.com/viewtopic.php?p=476873#476873
>>>
>>>
>>>
>>>
>>>
>>>
>>>
>>>
>>>
>>
>>
>>
>>
>
>
>
>
>
Message 3
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|
In regard to props and two strokes. It is my understanding that the three
blade props gave smoother flight, and a bit faster level flight, while a
two blade gives better climb, and is perhaps a bit noisier. A three blade
of course needs to be pitched a bit flatter. I was also told that the
proper way to pitch a prop was to tie it down by the tail to something
solid and pitch it to 6300 rpm's at wide open throttle. That will give you
the maximum of about 6700 unencumbered level flight, then you stabilize
your egt's with your jets to about 1150 level flight.
In regard to EGT levels it takes a bit of fiddling to get it squared away,
and there is lots of discussion in the archives concerning EGTS as well as
pitching props.
Larry
On Sat, Jan 6, 2018 at 11:06 AM, jpfitt <jpfitt@sbcglobal.net> wrote:
>
> I'm Very interested to hear about prop choices and initial settings with
> adjustable pitch props. I am nearing completion of a FS II with a dcdi 5
03
> ( 80 hrs TT) compression good, easy start, carbs set for this location, n
o
> intake leaks....plugs nice tan color.
> warp drive 64" three blade, 2.58 B box initial set at 11 deg= max rpm 4
800.
> Re-pitched to 9.5 deg. = 5200 rpm. Re- pitch to 8.75 deg. But best rpm
is
> 5800 rpm.
> During tests tried enriching (choke) , moving jet needle, main jets. EGT
> around 950.
> Brian at Kolb suggested initial prop setting of 12 deg. when I bought the
> prop from him.
> Can't believe that the prop should be set at this low degree.
> John Fitt from Sebastopol, Ca
>
>
> Sent from my iPad
>
> > On Dec 29, 2017, at 5:44 PM, George Helton <gdhelton@gmail.com> wrote:
> >
> >
> > Props are one of those things that require a lot of thought. I=99
ve run
> two blade wooden props. (Tennessee propeller) very good at matching prop
to
> specific engines. Real good composite leading edges are available.
> Reasonably priced.
> > I=99ve run Ivoprops in both two and three blade configurations wi
th good
> results, very adjustable. They held up well in sandy and decomposed grani
te
> runway conditions. The only downside was that they=99re heavy and s
eem to
> take a little longer to wind up. The blades do flex a lot and on some Kol
b
> models require a prop extension. Added cost.
> > At the present time I=99m liking Powerfin propellers. Beautifully
CNC
> machined hubs and light very stiff composite blades. Ceramic leading edge
s
> are available. I=99m sure they=99d be great in really abrasiv
e conditions.
> Extra cost though. They come in two and three blade versions. They are
> expensive, but worth the it I think.
> > Warp Drives are really good looking props. They look really well made.
> I=99ve heard that they are great propellers. I=99ve been told
that they=99re on
> the heavy side too. But, that=99s hearsay. I have no experience wit
h them, so
> I have no opinion.
> > I think the two blade props are more efficient for around performance.
> But, I like three blades simply because I like the climb power and
> smoothness. I think that I will loose a little on cruise with a three
> blade. But, I=99m all about takeoff and clearing trees up here. Jus
t my
> input. It=99s worth what it cost you. Just opinions. Have a great d
ay! George
> >
> > George Helton
> > 1986 Firestar, FS100
> > 14GDH
> > Mesick, Michigan
> > gdhelton@gmail.com
> >
> > Do not archive
> >
> >
> > Sent from my iPhone
> >
> >> On Dec 29, 2017, at 6:31 PM, japowell <japnmjp@twc.com> wrote:
> >>
> >>
> >> I sent the 503 out for a zero time rebuild to Heaven Bound Aviation in
> Johnstown. After looking at the prop, I found a few nicks and bruises on
> it and would like to replace it. What is the best prop for the 503? I ha
ve
> researched the achives and am still confused.
> >>
> >> Thanks.
> >>
> >> --------
> >> Jim P
> >> WAR EAGLE
> >>
> >>
> >>
> >>
> >> Read this topic online here:
> >>
> >> http://forums.matronics.com/viewtopic.php?p=476873#476873
> >>
> >>
> >>
> >>
> >>
> >>
> >>
> >>
> >>
> >
> >
> >
> >
>
>
===========
===========
===========
===========
===========
>
>
--
*The older I get, the less tolerant I am of those who are intolerant of
others.*
*If you forward this email, or any part of it, please remove my email
address before sending.*
Message 4
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|
In regard to props and two strokes. It is my understanding that the three
blade props gave smoother flight, and a bit faster level flight, while a
two blade gives better climb, and is perhaps a bit noisier. A three blade
of course needs to be pitched a bit flatter. I was also told that the
proper way to pitch a prop was to tie it down by the tail to something
solid and pitch it to 6300 rpm's at wide open throttle. That will give you
the maximum of about 6700 unencumbered level flight, then you stabilize
your egt's with your jets to about 1150 level flight.
In regard to EGT levels it takes a bit of fiddling to get it squared away,
and there is lots of discussion in the archives concerning EGTS as well as
pitching props.
Larry
On Sat, Jan 6, 2018 at 11:06 AM, jpfitt <jpfitt@sbcglobal.net> wrote:
>
> I'm Very interested to hear about prop choices and initial settings with
> adjustable pitch props. I am nearing completion of a FS II with a dcdi 5
03
> ( 80 hrs TT) compression good, easy start, carbs set for this location, n
o
> intake leaks....plugs nice tan color.
> warp drive 64" three blade, 2.58 B box initial set at 11 deg= max rpm 4
800.
> Re-pitched to 9.5 deg. = 5200 rpm. Re- pitch to 8.75 deg. But best rpm
is
> 5800 rpm.
> During tests tried enriching (choke) , moving jet needle, main jets. EGT
> around 950.
> Brian at Kolb suggested initial prop setting of 12 deg. when I bought the
> prop from him.
> Can't believe that the prop should be set at this low degree.
> John Fitt from Sebastopol, Ca
>
>
> Sent from my iPad
>
> > On Dec 29, 2017, at 5:44 PM, George Helton <gdhelton@gmail.com> wrote:
> >
> >
> > Props are one of those things that require a lot of thought. I=99
ve run
> two blade wooden props. (Tennessee propeller) very good at matching prop
to
> specific engines. Real good composite leading edges are available.
> Reasonably priced.
> > I=99ve run Ivoprops in both two and three blade configurations wi
th good
> results, very adjustable. They held up well in sandy and decomposed grani
te
> runway conditions. The only downside was that they=99re heavy and s
eem to
> take a little longer to wind up. The blades do flex a lot and on some Kol
b
> models require a prop extension. Added cost.
> > At the present time I=99m liking Powerfin propellers. Beautifully
CNC
> machined hubs and light very stiff composite blades. Ceramic leading edge
s
> are available. I=99m sure they=99d be great in really abrasiv
e conditions.
> Extra cost though. They come in two and three blade versions. They are
> expensive, but worth the it I think.
> > Warp Drives are really good looking props. They look really well made.
> I=99ve heard that they are great propellers. I=99ve been told
that they=99re on
> the heavy side too. But, that=99s hearsay. I have no experience wit
h them, so
> I have no opinion.
> > I think the two blade props are more efficient for around performance.
> But, I like three blades simply because I like the climb power and
> smoothness. I think that I will loose a little on cruise with a three
> blade. But, I=99m all about takeoff and clearing trees up here. Jus
t my
> input. It=99s worth what it cost you. Just opinions. Have a great d
ay! George
> >
> > George Helton
> > 1986 Firestar, FS100
> > 14GDH
> > Mesick, Michigan
> > gdhelton@gmail.com
> >
> > Do not archive
> >
> >
> > Sent from my iPhone
> >
> >> On Dec 29, 2017, at 6:31 PM, japowell <japnmjp@twc.com> wrote:
> >>
> >>
> >> I sent the 503 out for a zero time rebuild to Heaven Bound Aviation in
> Johnstown. After looking at the prop, I found a few nicks and bruises on
> it and would like to replace it. What is the best prop for the 503? I ha
ve
> researched the achives and am still confused.
> >>
> >> Thanks.
> >>
> >> --------
> >> Jim P
> >> WAR EAGLE
> >>
> >>
> >>
> >>
> >> Read this topic online here:
> >>
> >> http://forums.matronics.com/viewtopic.php?p=476873#476873
> >>
> >>
> >>
> >>
> >>
> >>
> >>
> >>
> >>
> >
> >
> >
> >
>
>
===========
===========
===========
===========
===========
>
>
--
*The older I get, the less tolerant I am of those who are intolerant of
others.*
*If you forward this email, or any part of it, please remove my email
address before sending.*
--
*The older I get, the less tolerant I am of those who are intolerant of
others.*
*If you forward this email, or any part of it, please remove my email
address before sending.*
Message 5
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|
Same prop (60") and gear box here except on a 447.
I started at 13 but had to back it down to about 8 to get in the ball park. Had
to fiddle with carb/pitch settings a little to get the proper EGT's. I don't
remember exactly but I think it is currently at 7.5
LOTS of power for a Firefly and really smooth over 2200 RPM.
Stuart
-----Original Message-----
From: owner-kolb-list-server@matronics.com [mailto:owner-kolb-list-server@matronics.com] On Behalf Of jpfitt
Sent: Saturday, January 06, 2018 12:07 PM
Subject: Re: Kolb-List: best props
I'm Very interested to hear about prop choices and initial settings with adjustable
pitch props. I am nearing completion of a FS II with a dcdi 503 ( 80 hrs
TT) compression good, easy start, carbs set for this location, no intake leaks....plugs
nice tan color.
warp drive 64" three blade, 2.58 B box initial set at 11 deg= max rpm 4800.
Re-pitched to 9.5 deg. = 5200 rpm. Re- pitch to 8.75 deg. But best rpm is 5800
rpm.
During tests tried enriching (choke) , moving jet needle, main jets. EGT around
950.
Brian at Kolb suggested initial prop setting of 12 deg. when I bought the prop
from him.
Can't believe that the prop should be set at this low degree.
John Fitt from Sebastopol, Ca
Sent from my iPad
> On Dec 29, 2017, at 5:44 PM, George Helton <gdhelton@gmail.com> wrote:
>
>
> Props are one of those things that require a lot of thought. Ive run two blade
wooden props. (Tennessee propeller) very good at matching prop to specific engines.
Real good composite leading edges are available. Reasonably priced.
> Ive run Ivoprops in both two and three blade configurations with good results,
very adjustable. They held up well in sandy and decomposed granite runway conditions.
The only downside was that theyre heavy and seem to take a little longer
to wind up. The blades do flex a lot and on some Kolb models require a prop
extension. Added cost.
> At the present time Im liking Powerfin propellers. Beautifully CNC machined hubs
and light very stiff composite blades. Ceramic leading edges are available.
Im sure theyd be great in really abrasive conditions. Extra cost though. They
come in two and three blade versions. They are expensive, but worth the it I
think.
> Warp Drives are really good looking props. They look really well made. Ive heard
that they are great propellers. Ive been told that theyre on the heavy side
too. But, thats hearsay. I have no experience with them, so I have no opinion.
> I think the two blade props are more efficient for around performance.
> But, I like three blades simply because I like the climb power and
> smoothness. I think that I will loose a little on cruise with a three
> blade. But, Im all about takeoff and clearing trees up here. Just my
> input. Its worth what it cost you. Just opinions. Have a great day!
> George
>
> George Helton
> 1986 Firestar, FS100
> 14GDH
> Mesick, Michigan
> gdhelton@gmail.com
>
> Do not archive
>
>
> Sent from my iPhone
>
>> On Dec 29, 2017, at 6:31 PM, japowell <japnmjp@twc.com> wrote:
>>
>>
>> I sent the 503 out for a zero time rebuild to Heaven Bound Aviation in Johnstown.
After looking at the prop, I found a few nicks and bruises on it and would
like to replace it. What is the best prop for the 503? I have researched
the achives and am still confused.
>>
>> Thanks.
>>
>> --------
>> Jim P
>> WAR EAGLE
>>
>>
>>
>>
>> Read this topic online here:
>>
>> http://forums.matronics.com/viewtopic.php?p=476873#476873
>>
>>
>>
>>
>>
>>
>>
>>
>>
>
>
>
>
Message 6
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|
Thanks for the input guys. Can anyone tell me about their own configuration-
Pitch, prop manufacture, engine type? When you were getting close to attaini
ng the 6300 rpm was the final pitch adjustment very small...would a 1/2 degr
ee make a big difference?
Sent from my iPhone
> On Jan 6, 2018, at 12:37 PM, Larry Cottrell <lcottrell1020@gmail.com> wrot
e:
>
>
>
>
> In regard to props and two strokes. It is my understanding that the three b
lade props gave smoother flight, and a bit faster level flight, while a two b
lade gives better climb, and is perhaps a bit noisier. A three blade of cour
se needs to be pitched a bit flatter. I was also told that the proper way to
pitch a prop was to tie it down by the tail to something solid and pitch it
to 6300 rpm's at wide open throttle. That will give you the maximum of abou
t 6700 unencumbered level flight, then you stabilize your egt's with your je
ts to about 1150 level flight.
> In regard to EGT levels it takes a bit of fiddling to get it squared away,
and there is lots of discussion in the archives concerning EGTS as well as p
itching props.
>
> Larry
>
>> On Sat, Jan 6, 2018 at 11:06 AM, jpfitt <jpfitt@sbcglobal.net> wrote:
>>
>> I'm Very interested to hear about prop choices and initial settings with a
djustable pitch props. I am nearing completion of a FS II with a dcdi 503 (
80 hrs TT) compression good, easy start, carbs set for this location, no in
take leaks....plugs nice tan color.
>> warp drive 64" three blade, 2.58 B box initial set at 11 deg= max rpm 4
800.
>> Re-pitched to 9.5 deg. = 5200 rpm. Re- pitch to 8.75 deg. But best rpm i
s 5800 rpm.
>> During tests tried enriching (choke) , moving jet needle, main jets. EGT a
round 950.
>> Brian at Kolb suggested initial prop setting of 12 deg. when I bought the
prop from him.
>> Can't believe that the prop should be set at this low degree.
>> John Fitt from Sebastopol, Ca
>>
>>
>> Sent from my iPad
>>
>> > On Dec 29, 2017, at 5:44 PM, George Helton <gdhelton@gmail.com> wrote:
>> >
>> >
>> > Props are one of those things that require a lot of thought. I=99
ve run two blade wooden props. (Tennessee propeller) very good at matching p
rop to specific engines. Real good composite leading edges are available. Re
asonably priced.
>> > I=99ve run Ivoprops in both two and three blade configurations wi
th good results, very adjustable. They held up well in sandy and decomposed g
ranite runway conditions. The only downside was that they=99re heavy a
nd seem to take a little longer to wind up. The blades do flex a lot and on s
ome Kolb models require a prop extension. Added cost.
>> > At the present time I=99m liking Powerfin propellers. Beautifully
CNC machined hubs and light very stiff composite blades. Ceramic leading ed
ges are available. I=99m sure they=99d be great in really abrasi
ve conditions. Extra cost though. They come in two and three blade versions.
They are expensive, but worth the it I think.
>> > Warp Drives are really good looking props. They look really well made. I
=99ve heard that they are great propellers. I=99ve been told tha
t they=99re on the heavy side too. But, that=99s hearsay. I have
no experience with them, so I have no opinion.
>> > I think the two blade props are more efficient for around performance. B
ut, I like three blades simply because I like the climb power and smoothness
. I think that I will loose a little on cruise with a three blade. But, I
=99m all about takeoff and clearing trees up here. Just my input. It
=99s worth what it cost you. Just opinions. Have a great day! George
>> >
>> > George Helton
>> > 1986 Firestar, FS100
>> > 14GDH
>> > Mesick, Michigan
>> > gdhelton@gmail.com
>> >
>> > Do not archive
>> >
>> >
>> > Sent from my iPhone
>> >
>> >> On Dec 29, 2017, at 6:31 PM, japowell <japnmjp@twc.com> wrote:
>> >>
>> >>
>> >> I sent the 503 out for a zero time rebuild to Heaven Bound Aviation in
Johnstown. After looking at the prop, I found a few nicks and bruises on i
t and would like to replace it. What is the best prop for the 503? I have r
esearched the achives and am still confused.
>> >>
>> >> Thanks.
>> >>
>> >> --------
>> >> Jim P
>> >> WAR EAGLE
>> >>
>> >>
>> >>
>> >>
>> >> Read this topic online here:
>> >>
>> >> http://forums.matronics.com/viewtopic.php?p=476873#476873
>> >>
>> >>
>> >>
>> >>
>> >>
>> >>
>> >>
>> >>
>> >>
>> >
>> >
>> >
>> >
>>
>>
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>
>
>
> --
> The older I get, the less tolerant I am of those who are intolerant of oth
ers.
>
> If you forward this email, or any part of it, please remove my email addre
ss before sending.
>
>
>
> --
> The older I get, the less tolerant I am of those who are intolerant of oth
ers.
>
> If you forward this email, or any part of it, please remove my email addre
ss before sending.
Message 7
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Were the final pitch adjustments small compared to the first, did the engine really
come on strong, with any EGT changes?
Sent from my iPhone
> On Jan 6, 2018, at 3:43 PM, Stuart Harner <stuart@harnerfarm.net> wrote:
>
>
> Same prop (60") and gear box here except on a 447.
>
> I started at 13 but had to back it down to about 8 to get in the ball park. Had
to fiddle with carb/pitch settings a little to get the proper EGT's. I don't
remember exactly but I think it is currently at 7.5
>
> LOTS of power for a Firefly and really smooth over 2200 RPM.
>
> Stuart
>
> -----Original Message-----
> From: owner-kolb-list-server@matronics.com [mailto:owner-kolb-list-server@matronics.com] On Behalf Of jpfitt
> Sent: Saturday, January 06, 2018 12:07 PM
> To: kolb-list@matronics.com
> Subject: Re: Kolb-List: best props
>
>
> I'm Very interested to hear about prop choices and initial settings with adjustable
pitch props. I am nearing completion of a FS II with a dcdi 503 ( 80 hrs
TT) compression good, easy start, carbs set for this location, no intake leaks....plugs
nice tan color.
> warp drive 64" three blade, 2.58 B box initial set at 11 deg= max rpm 4800.
> Re-pitched to 9.5 deg. = 5200 rpm. Re- pitch to 8.75 deg. But best rpm is 5800
rpm.
> During tests tried enriching (choke) , moving jet needle, main jets. EGT around
950.
> Brian at Kolb suggested initial prop setting of 12 deg. when I bought the prop
from him.
> Can't believe that the prop should be set at this low degree.
> John Fitt from Sebastopol, Ca
>
>
> Sent from my iPad
>
>> On Dec 29, 2017, at 5:44 PM, George Helton <gdhelton@gmail.com> wrote:
>>
>>
>> Props are one of those things that require a lot of thought. Ive run two blade
wooden props. (Tennessee propeller) very good at matching prop to specific
engines. Real good composite leading edges are available. Reasonably priced.
>> Ive run Ivoprops in both two and three blade configurations with good results,
very adjustable. They held up well in sandy and decomposed granite runway conditions.
The only downside was that theyre heavy and seem to take a little longer
to wind up. The blades do flex a lot and on some Kolb models require a prop
extension. Added cost.
>> At the present time Im liking Powerfin propellers. Beautifully CNC machined
hubs and light very stiff composite blades. Ceramic leading edges are available.
Im sure theyd be great in really abrasive conditions. Extra cost though. They
come in two and three blade versions. They are expensive, but worth the it
I think.
>> Warp Drives are really good looking props. They look really well made. Ive heard
that they are great propellers. Ive been told that theyre on the heavy side
too. But, thats hearsay. I have no experience with them, so I have no opinion.
>> I think the two blade props are more efficient for around performance.
>> But, I like three blades simply because I like the climb power and
>> smoothness. I think that I will loose a little on cruise with a three
>> blade. But, Im all about takeoff and clearing trees up here. Just my
>> input. Its worth what it cost you. Just opinions. Have a great day!
>> George
>>
>> George Helton
>> 1986 Firestar, FS100
>> 14GDH
>> Mesick, Michigan
>> gdhelton@gmail.com
>>
>> Do not archive
>>
>>
>> Sent from my iPhone
>>
>>> On Dec 29, 2017, at 6:31 PM, japowell <japnmjp@twc.com> wrote:
>>>
>>>
>>> I sent the 503 out for a zero time rebuild to Heaven Bound Aviation in Johnstown.
After looking at the prop, I found a few nicks and bruises on it and would
like to replace it. What is the best prop for the 503? I have researched
the achives and am still confused.
>>>
>>> Thanks.
>>>
>>> --------
>>> Jim P
>>> WAR EAGLE
>>>
>>>
>>>
>>>
>>> Read this topic online here:
>>>
>>> http://forums.matronics.com/viewtopic.php?p=476873#476873
>>>
>>>
>>>
>>>
>>>
>>>
>>>
>>>
>>>
>>
>>
>>
>>
>
>
>
>
>
>
>
>
>
>
Message 8
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I am running an HKS with a 66 inch two blade warp with nickle leading edge.
I just set it to max rpm of 6000. It took about three or four attempts and
I guessed at the static allowing the same increase that would be for a two
stroke.which was 4000 rpm gain. Then I think I got it close enough after a
coupe of minor adjustments. EGT isn't a problem with the HKS so that was
one less thing to worry about. Prior to that I had a 503 with a two blade
IVO, and later with a three blade IVO.
Its worth the effort to get it right. You should remember if the egt's
flare up in midrange (which is where the problem will show up) use the
"enrichner (choke) to give it more fuel and reduce the egt's. Stay in the
pattern for your tests, and if necessary you can just cut the engine.
It will be a bit of a hassle, but worth it.
Larry
On Sat, Jan 6, 2018 at 4:48 PM, John Fitt <jpfitt@sbcglobal.net> wrote:
> Thanks for the input guys. Can anyone tell me about their own
> configuration-
> Pitch, prop manufacture, engine type? When you were getting close to
> attaining the 6300 rpm was the final pitch adjustment very small...would
a
> 1/2 degree make a big difference?
>
> Sent from my iPhone
>
> On Jan 6, 2018, at 12:37 PM, Larry Cottrell <lcottrell1020@gmail.com>
> wrote:
>
>
> In regard to props and two strokes. It is my understanding that the three
> blade props gave smoother flight, and a bit faster level flight, while a
> two blade gives better climb, and is perhaps a bit noisier. A three blade
> of course needs to be pitched a bit flatter. I was also told that the
> proper way to pitch a prop was to tie it down by the tail to something
> solid and pitch it to 6300 rpm's at wide open throttle. That will give yo
u
> the maximum of about 6700 unencumbered level flight, then you stabilize
> your egt's with your jets to about 1150 level flight.
> In regard to EGT levels it takes a bit of fiddling to get it squared away
,
> and there is lots of discussion in the archives concerning EGTS as well a
s
> pitching props.
>
> Larry
>
> On Sat, Jan 6, 2018 at 11:06 AM, jpfitt <jpfitt@sbcglobal.net> wrote:
>
>>
>> I'm Very interested to hear about prop choices and initial settings with
>> adjustable pitch props. I am nearing completion of a FS II with a dcdi
503
>> ( 80 hrs TT) compression good, easy start, carbs set for this location,
no
>> intake leaks....plugs nice tan color.
>> warp drive 64" three blade, 2.58 B box initial set at 11 deg= max rpm
>> 4800.
>> Re-pitched to 9.5 deg. = 5200 rpm. Re- pitch to 8.75 deg. But best rpm
is
>> 5800 rpm.
>> During tests tried enriching (choke) , moving jet needle, main jets. EGT
>> around 950.
>> Brian at Kolb suggested initial prop setting of 12 deg. when I bought th
e
>> prop from him.
>> Can't believe that the prop should be set at this low degree.
>> John Fitt from Sebastopol, Ca
>>
>>
>> Sent from my iPad
>>
>> > On Dec 29, 2017, at 5:44 PM, George Helton <gdhelton@gmail.com> wrote:
>> >
>> >
>> > Props are one of those things that require a lot of thought. I
=99ve run
>> two blade wooden props. (Tennessee propeller) very good at matching prop
to
>> specific engines. Real good composite leading edges are available.
>> Reasonably priced.
>> > I=99ve run Ivoprops in both two and three blade configurations w
ith good
>> results, very adjustable. They held up well in sandy and decomposed gran
ite
>> runway conditions. The only downside was that they=99re heavy and
seem to
>> take a little longer to wind up. The blades do flex a lot and on some Ko
lb
>> models require a prop extension. Added cost.
>> > At the present time I=99m liking Powerfin propellers. Beautifull
y CNC
>> machined hubs and light very stiff composite blades. Ceramic leading edg
es
>> are available. I=99m sure they=99d be great in really abrasi
ve conditions.
>> Extra cost though. They come in two and three blade versions. They are
>> expensive, but worth the it I think.
>> > Warp Drives are really good looking props. They look really well made.
>> I=99ve heard that they are great propellers. I=99ve been tol
d that they=99re on
>> the heavy side too. But, that=99s hearsay. I have no experience wi
th them, so
>> I have no opinion.
>> > I think the two blade props are more efficient for around performance.
>> But, I like three blades simply because I like the climb power and
>> smoothness. I think that I will loose a little on cruise with a three
>> blade. But, I=99m all about takeoff and clearing trees up here. Ju
st my
>> input. It=99s worth what it cost you. Just opinions. Have a great
day! George
>> >
>> > George Helton
>> > 1986 Firestar, FS100
>> > 14GDH
>> > Mesick, Michigan
>> > gdhelton@gmail.com
>> >
>> > Do not archive
>> >
>> >
>> > Sent from my iPhone
>> >
>> >> On Dec 29, 2017, at 6:31 PM, japowell <japnmjp@twc.com> wrote:
>> >>
>> >>
>> >> I sent the 503 out for a zero time rebuild to Heaven Bound Aviation i
n
>> Johnstown. After looking at the prop, I found a few nicks and bruises o
n
>> it and would like to replace it. What is the best prop for the 503? I h
ave
>> researched the achives and am still confused.
>> >>
>> >> Thanks.
>> >>
>> >> --------
>> >> Jim P
>> >> WAR EAGLE
>> >>
>> >>
>> >>
>> >>
>> >> Read this topic online here:
>> >>
>> >> http://forums.matronics.com/viewtopic.php?p=476873#476873
>> >>
>> >>
>> >>
>> >>
>> >>
>> >>
>> >>
>> >>
>> >>
>> >
>> >
>> >
>> >
>>
>>
>> ========================
===========
>> -List" rel="noreferrer" target="_blank">http://www.matronics.com/Nav
ig
>> ator?Kolb-List
>> ========================
===========
>> FORUMS -
>> eferrer" target="_blank">http://forums.matronics.com
>> ========================
===========
>> WIKI -
>> errer" target="_blank">http://wiki.matronics.com
>> ========================
===========
>> b Site -
>> -Matt Dralle, List Admin.
>> rel="noreferrer" target="_blank">http://www.matronics.com/contributi
on
>> ========================
===========
>>
>>
>>
>>
>
>
> --
> *The older I get, the less tolerant I am of those who are intolerant of
> others.*
>
> *If you forward this email, or any part of it, please remove my email
> address before sending.*
>
>
> --
> *The older I get, the less tolerant I am of those who are intolerant of
> others.*
>
> *If you forward this email, or any part of it, please remove my email
> address before sending.*
>
>
--
*The older I get, the less tolerant I am of those who are intolerant of
others.*
*If you forward this email, or any part of it, please remove my email
address before sending.*
Message 9
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|
Thanks! I guess I=99ll take the pitch down to 8 deg.
John Fitt
Sent from my iPhone
> On Jan 6, 2018, at 4:03 PM, Larry Cottrell <lcottrell1020@gmail.com> wrote
:
>
> I am running an HKS with a 66 inch two blade warp with nickle leading edge
. I just set it to max rpm of 6000. It took about three or four attempts and
I guessed at the static allowing the same increase that would be for a two s
troke.which was 4000 rpm gain. Then I think I got it close enough after a co
upe of minor adjustments. EGT isn't a problem with the HKS so that was one l
ess thing to worry about. Prior to that I had a 503 with a two blade IVO, an
d later with a three blade IVO.
>
> Its worth the effort to get it right. You should remember if the egt's fla
re up in midrange (which is where the problem will show up) use the "enrichn
er (choke) to give it more fuel and reduce the egt's. Stay in the pattern fo
r your tests, and if necessary you can just cut the engine.
>
> It will be a bit of a hassle, but worth it.
> Larry
>
>> On Sat, Jan 6, 2018 at 4:48 PM, John Fitt <jpfitt@sbcglobal.net> wrote:
>> Thanks for the input guys. Can anyone tell me about their own configurati
on-
>> Pitch, prop manufacture, engine type? When you were getting close to atta
ining the 6300 rpm was the final pitch adjustment very small...would a 1/2 d
egree make a big difference?
>>
>> Sent from my iPhone
>>
>>> On Jan 6, 2018, at 12:37 PM, Larry Cottrell <lcottrell1020@gmail.com> wr
ote:
>>>
>>>
>>>
>>>
>>> In regard to props and two strokes. It is my understanding that the thre
e blade props gave smoother flight, and a bit faster level flight, while a t
wo blade gives better climb, and is perhaps a bit noisier. A three blade of c
ourse needs to be pitched a bit flatter. I was also told that the proper way
to pitch a prop was to tie it down by the tail to something solid and pitch
it to 6300 rpm's at wide open throttle. That will give you the maximum of a
bout 6700 unencumbered level flight, then you stabilize your egt's with your
jets to about 1150 level flight.
>>> In regard to EGT levels it takes a bit of fiddling to get it squared awa
y, and there is lots of discussion in the archives concerning EGTS as well a
s pitching props.
>>>
>>> Larry
>>>
>>>> On Sat, Jan 6, 2018 at 11:06 AM, jpfitt <jpfitt@sbcglobal.net> wrote:
>>>>
>>>> I'm Very interested to hear about prop choices and initial settings wit
h adjustable pitch props. I am nearing completion of a FS II with a dcdi 50
3 ( 80 hrs TT) compression good, easy start, carbs set for this location, no
intake leaks....plugs nice tan color.
>>>> warp drive 64" three blade, 2.58 B box initial set at 11 deg= max rpm
4800.
>>>> Re-pitched to 9.5 deg. = 5200 rpm. Re- pitch to 8.75 deg. But best rp
m is 5800 rpm.
>>>> During tests tried enriching (choke) , moving jet needle, main jets. EG
T around 950.
>>>> Brian at Kolb suggested initial prop setting of 12 deg. when I bought t
he prop from him.
>>>> Can't believe that the prop should be set at this low degree.
>>>> John Fitt from Sebastopol, Ca
>>>>
>>>>
>>>> Sent from my iPad
>>>>
>>>> > On Dec 29, 2017, at 5:44 PM, George Helton <gdhelton@gmail.com> wrote
:
>>>> >
>>>> >
>>>> > Props are one of those things that require a lot of thought. I=99
ve run two blade wooden props. (Tennessee propeller) very good at matching p
rop to specific engines. Real good composite leading edges are available. Re
asonably priced.
>>>> > I=99ve run Ivoprops in both two and three blade configurations w
ith good results, very adjustable. They held up well in sandy and decomposed
granite runway conditions. The only downside was that they=99re heavy
and seem to take a little longer to wind up. The blades do flex a lot and o
n some Kolb models require a prop extension. Added cost.
>>>> > At the present time I=99m liking Powerfin propellers. Beautiful
ly CNC machined hubs and light very stiff composite blades. Ceramic leading e
dges are available. I=99m sure they=99d be great in really abras
ive conditions. Extra cost though. They come in two and three blade versions
. They are expensive, but worth the it I think.
>>>> > Warp Drives are really good looking props. They look really well made
. I=99ve heard that they are great propellers. I=99ve been told t
hat they=99re on the heavy side too. But, that=99s hearsay. I ha
ve no experience with them, so I have no opinion.
>>>> > I think the two blade props are more efficient for around performance
. But, I like three blades simply because I like the climb power and smoothn
ess. I think that I will loose a little on cruise with a three blade. But, I
=99m all about takeoff and clearing trees up here. Just my input. It
=99s worth what it cost you. Just opinions. Have a great day! George
>>>> >
>>>> > George Helton
>>>> > 1986 Firestar, FS100
>>>> > 14GDH
>>>> > Mesick, Michigan
>>>> > gdhelton@gmail.com
>>>> >
>>>> > Do not archive
>>>> >
>>>> >
>>>> > Sent from my iPhone
>>>> >
>>>> >> On Dec 29, 2017, at 6:31 PM, japowell <japnmjp@twc.com> wrote:
>>>> >>
>>>> >>
>>>> >> I sent the 503 out for a zero time rebuild to Heaven Bound Aviation i
n Johnstown. After looking at the prop, I found a few nicks and bruises on i
t and would like to replace it. What is the best prop for the 503? I have r
esearched the achives and am still confused.
>>>> >>
>>>> >> Thanks.
>>>> >>
>>>> >> --------
>>>> >> Jim P
>>>> >> WAR EAGLE
>>>> >>
>>>> >>
>>>> >>
>>>> >>
>>>> >> Read this topic online here:
>>>> >>
>>>> >> http://forums.matronics.com/viewtopic.php?p=476873#476873
>>>> >>
>>>> >>
>>>> >>
>>>> >>
>>>> >>
>>>> >>
>>>> >>
>>>> >>
>>>> >>
>>>> >
>>>> >
>>>> >
>>>> >
>>>>
>>>>
>>>> ==========
>>>> -List" rel="noreferrer" target="_blank">http://www.matronics.com/Na
vigator?Kolb-List
>>>> ==========
>>>> FORUMS -
>>>> eferrer" target="_blank">http://forums.matronics.com
>>>> ==========
>>>> WIKI -
>>>> errer" target="_blank">http://wiki.matronics.com
>>>> ==========
>>>> b Site -
>>>> -Matt Dralle, List Admin.
>>>> rel="noreferrer" target="_blank">http://www.matronics.com/contribut
ion
>>>> ==========
>>>>
>>>>
>>>>
>>>
>>>
>>>
>>> --
>>> The older I get, the less tolerant I am of those who are intolerant of o
thers.
>>>
>>> If you forward this email, or any part of it, please remove my email add
ress before sending.
>>>
>>>
>>> The older I get, the less tolerant I am of those who are intolerant of o
thers.
>>>
>>> If you forward this email, or any part of it, please remove my email add
ress before sending.
>
>
>
> --
> The older I get, the less tolerant I am of those who are intolerant of oth
ers.
>
> If you forward this email, or any part of it, please remove my email addre
ss before sending.
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