Today's Message Index:
----------------------
1. 11:25 AM - Re: Cont. 0200 prop pitch (pjb)
2. 12:54 PM - Re: Re: Cont. 0200 prop pitch (Marcus Zechini)
3. 01:22 PM - Re: Re: Cont. 0200 prop pitch (Paul Waterhouse)
4. 02:01 PM - Re: Re: Cont. 0200 prop pitch (L. Harris)
5. 03:53 PM - Re: Cont. 0200 prop pitch (TriScout)
6. 06:23 PM - Re: Re: Cont. 0200 prop pitch (shad bell)
7. 09:25 PM - Re: Cont. 0200 prop pitch (taildrags)
Message 1
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| Subject: | Re: Cont. 0200 prop pitch |
pjb wrote:
> I recently replaced the Continental A75 on my Pietenpol with
> an 0200-A.
> We used the Cloudcars 74-38 that was on the A75 after counterboring
> the holes to fit the 0200-A.
>
> It looks large in the photo but there is 9" clearance !!
>
>
> Full throttle static rpm was 2500 and the first 2 test flights showed
> normal operating rpms .
>
> Patricia
I spoke too soon !!
We have flown about 7 hours since installing the 0 SMOH 0-200A engine
on my Pietenpol so I now have a better idea of the performance as the
engine 'loosens up'
The 74-38 prop is way too fine a pitch and the engine needs to be throttled back
to prevent overspeeding. The result is that we're not able to use the
full power of the engine and we're not getting either good climb or good
cruise.
A few days ago, I tried a borrowed 72-40 prop and it was considerably
better [ did not overspeed on climb out but did overspeed in cruise.
I think we still need a slightly coarser pitch and will be trying out
another borrowed prop this week.
When I have a good idea of the numbers, I will buy one. I still want a wood
prop.
Has anyone had a similar experience matching a wood prop to the 0-200A
engine on a Piet ?
Patricia
Read this topic online here:
http://forums.matronics.com/viewtopic.php?p=472878#472878
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| Subject: | Re: Cont. 0200 prop pitch |
I have a McCauley metal 74x41 on a C-85 on my GN-1. 2450 rpm climb out and
level cruise. Would like wood but fear I need the metal for CG reasons.
This prop was also on the A65 this plane was built with. I want to
experiment before buying or re-pitching. I think I can get a few more knots
(not important), and maybe a little better fuel burn. So far only borrowed
a 74x47. Way too much pitch. Will be interested in your research!
On Thu, Sep 14, 2017 at 2:27 PM pjb <pjb@ornithopter-pilot.com> wrote:
>
>
> pjb wrote:
> > I recently replaced the Continental A75 on my Pietenpol with
> > an 0200-A.
> > We used the Cloudcars 74-38 that was on the A75 after counterboring
> > the holes to fit the 0200-A.
> >
> > It looks large in the photo but there is 9" clearance !!
> >
> >
> > Full throttle static rpm was 2500 and the first 2 test flights showed
> > normal operating rpms .
> >
> > Patricia
>
>
> I spoke too soon !!
> We have flown about 7 hours since installing the 0 SMOH 0-200A engine
> on my Pietenpol so I now have a better idea of the performance as the
> engine 'loosens up'
> The 74-38 prop is way too fine a pitch and the engine needs to be
> throttled back to prevent overspeeding. The result is that we're not able
> to use the
> full power of the engine and we're not getting either good climb or good
> cruise.
>
> A few days ago, I tried a borrowed 72-40 prop and it was considerably
> better [ did not overspeed on climb out but did overspeed in cruise.
> I think we still need a slightly coarser pitch and will be trying out
> another borrowed prop this week.
>
> When I have a good idea of the numbers, I will buy one. I still want a wood
> prop.
> Has anyone had a similar experience matching a wood prop to the 0-200A
> engine on a Piet ?
>
> Patricia
>
>
> Read this topic online here:
>
> http://forums.matronics.com/viewtopic.php?p=472878#472878
>
>
Message 3
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| Subject: | Re: Cont. 0200 prop pitch |
Hi Guys,
Try talking to Gary at APS props in NZ. He makes very nice wo
oden props & sends them all over the world.
I have one under the bed waiting for me to finish the aeroplane.
Sent from my iPhone
> On 15/09/2017, at 7:52 AM, Marcus Zechini <marcus.zechini@gmail.com> wrote
:
>
> I have a McCauley metal 74x41 on a C-85 on my GN-1. 2450 rpm climb out and
level cruise. Would like wood but fear I need the metal for CG reasons. Thi
s prop was also on the A65 this plane was built with. I want to experiment b
efore buying or re-pitching. I think I can get a few more knots (not importa
nt), and maybe a little better fuel burn. So far only borrowed a 74x47. Wa
y too much pitch. Will be interested in your research!
>
>> On Thu, Sep 14, 2017 at 2:27 PM pjb <pjb@ornithopter-pilot.com> wrote:
>>
>>
>> pjb wrote:
>> > I recently replaced the Continental A75 on my Pietenpol with
>> > an 0200-A.
>> > We used the Cloudcars 74-38 that was on the A75 after counterboring
>> > the holes to fit the 0200-A.
>> >
>> > It looks large in the photo but there is 9" clearance !!
>> >
>> >
>> > Full throttle static rpm was 2500 and the first 2 test flights showed
>> > normal operating rpms .
>> >
>> > Patricia
>>
>>
>> I spoke too soon !!
>> We have flown about 7 hours since installing the 0 SMOH 0-200A engine
>> on my Pietenpol so I now have a better idea of the performance as the
>> engine 'loosens up'
>> The 74-38 prop is way too fine a pitch and the engine needs to be throttl
ed back to prevent overspeeding. The result is that we're not able to use th
e
>> full power of the engine and we're not getting either good climb or good
>> cruise.
>>
>> A few days ago, I tried a borrowed 72-40 prop and it was considerably
>> better [ did not overspeed on climb out but did overspeed in cruise.
>> I think we still need a slightly coarser pitch and will be trying out
>> another borrowed prop this week.
>>
>> When I have a good idea of the numbers, I will buy one. I still want a wo
od
>> prop.
>> Has anyone had a similar experience matching a wood prop to the 0-200A
>> engine on a Piet ?
>>
>> Patricia
>>
>>
>>
>>
>> Read this topic online here:
>>
>> http://forums.matronics.com/viewtopic.php?p=472878#472878
>>
>>
>>
>>
>>
>>
>> ==========
>> br> enpol-List" rel="noreferrer" target="_blank">http://www.matronics
.com/Navigator?Pietenpol-List
>> ==========
>> FORUMS -
>> eferrer" target="_blank">http://forums.matronics.com
>> ==========
>> WIKI -
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>> ==========
>> b Site -
>> -Matt Dralle, List Admin.
>> rel="noreferrer" target="_blank">http://www.matronics.com/contributio
n
>> ==========
>>
>>
>>
Message 4
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| Subject: | Re: Cont. 0200 prop pitch |
Just a data point for you: 100hp at 2750rpm, 95 mph - arithmetic says you s
hould have a 66/42 prop.
Lorenzo
________________________________
From: owner-pietenpol-list-server@matronics.com <owner-pietenpol-list-serve
r@matronics.com> on behalf of pjb <pjb@ornithopter-pilot.com>
Sent: Thursday, September 14, 2017 2:25 PM
Subject: Pietenpol-List: Re: Cont. 0200 prop pitch
pjb wrote:
> I recently replaced the Continental A75 on my Pietenpol with
> an 0200-A.
> We used the Cloudcars 74-38 that was on the A75 after counterboring
> the holes to fit the 0200-A.
>
> It looks large in the photo but there is 9" clearance !!
>
>
> Full throttle static rpm was 2500 and the first 2 test flights showed
> normal operating rpms .
>
> Patricia
I spoke too soon !!
We have flown about 7 hours since installing the 0 SMOH 0-200A engine
on my Pietenpol so I now have a better idea of the performance as the
engine 'loosens up'
The 74-38 prop is way too fine a pitch and the engine needs to be throttled
back to prevent overspeeding. The result is that we're not able to use the
full power of the engine and we're not getting either good climb or good
cruise.
A few days ago, I tried a borrowed 72-40 prop and it was considerably
better [ did not overspeed on climb out but did overspeed in cruise.
I think we still need a slightly coarser pitch and will be trying out
another borrowed prop this week.
When I have a good idea of the numbers, I will buy one. I still want a wood
prop.
Has anyone had a similar experience matching a wood prop to the 0-200A
engine on a Piet ?
Patricia
Read this topic online here:
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| Subject: | Re: Cont. 0200 prop pitch |
....
--------
KLNC
A65-8
N2308C
Slick 4330's
AN Hardware
Airframe 780TT
W72CK-42 Sensenich
Standard Factory GN-1
Read this topic online here:
http://forums.matronics.com/viewtopic.php?p=472890#472890
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| Subject: | Re: Cont. 0200 prop pitch |
I know that the cessna 150 with same engine uses a 69-48 for climb a 69-50
standard and i brlieve 69-52 for cruise. These are all aluminum McCauley pr
ops. The 150 cruises about 100mph. Not sure if this helps. I think the figu
re my prop builder told me was one inch of length equals about 50rpm.=C2-
Shad
Sent from Yahoo Mail for iPhone
On Thursday, September 14, 2017, 5:00 PM, L. Harris <larharris2@msn.com> wr
ote:
<!--#yiv8329229573 P {margin-top:0;margin-bottom:0;}-->
Just a data point for you: 100hp at 2750rpm, 95 mph - arithmetic says you s
hould have a 66/42 prop.
Lorenzo
From: owner-pietenpol-list-server@matronics.com <owner-pietenpol-list-serve
r@matronics.com> on behalf of pjb <pjb@ornithopter-pilot.com>
Sent: Thursday, September 14, 2017 2:25 PM
Subject: Pietenpol-List: Re: Cont. 0200 prop pitch=C2---> Pietenpol-List
message posted by: "pjb" <pjb@ornithopter-pilot.com>
pjb wrote:
> I recently replaced the Continental A75 on my Pietenpol with
> an 0200-A.
> We used the Cloudcars 74-38 that was on the A75 after counterboring
> the holes to fit the 0200-A.
>
> It looks large in the photo but there is=C2- 9" clearance !!
>
>
> Full throttle static rpm was 2500 and=C2- the first 2 test flights show
ed
> normal operating rpms .
>
> Patricia
I spoke too soon !!
We have flown about 7 hours since installing the=C2- 0 SMOH 0-200A engine
on my Pietenpol so I now have a better idea of the performance as the
engine 'loosens up'
The 74-38 prop is way too fine a pitch and the engine needs to be throttled
back to prevent overspeeding. The result is that we're not able to use the
full power of the engine and we're not getting either good climb or good
cruise.
A few days ago, I tried a borrowed 72-40 prop and it was considerably
better=C2- [ did not overspeed on climb out but did overspeed in cruise.
I think we still need a slightly coarser pitch and will be trying out
another borrowed prop this week.
When I have a good idea of the numbers, I will buy one. I still want a wood
prop.
Has anyone had a similar experience matching a wood prop to the 0-200A
engine on a Piet ?
Patricia
Read this topic online here:
https://nam03.safelinks.protection.outlook.com/?url=http%3A%2F%2Fforums.m
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| Subject: | Re: Cont. 0200 prop pitch |
My two cents: the Air Camper (don't know about the GN-1) was never intended to
cruise at either 95 or 100 MPH. The O-200 should give excellent climb performance
with the airplane fully fueled and loaded and on high/hot days, with the
right prop on the airplane, but it will be throttled back considerably in cruise.
The design Vne for an Air Camper is somewhere around 95 MPH and even at that
speed it's not a happy airplane. The Corvair/Piet guys know how best to use
100 HP on an Air Camper and it has nothing to do with cruising at 100 MPH.
My opinion only, please discuss because that's why we are all here.
--------
Oscar Zuniga
Medford, OR
Air Camper NX41CC "Scout"
A75 power, 72x36 Culver prop
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