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Cont. 0200 prop pitch

 
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Gn1flyer



Joined: 04 Jun 2015
Posts: 2

PostPosted: Sat Jun 06, 2015 7:41 am    Post subject: Cont. 0200 prop pitch Reply with quote

I am close to having my Continental 0200 GN1 ready for flight. I bought a used McCauley 1A105 SCM 71X54 prop to use. I plan on taking it to a prop
shop to have it repainted and re-pitched. Any suggestions on what pitch I should have it re-pitched to?


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Last edited by Gn1flyer on Sat Jun 06, 2015 10:31 am; edited 1 time in total
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tkreiner



Joined: 06 Aug 2009
Posts: 180
Location: Spring, TX

PostPosted: Sat Jun 06, 2015 8:31 am    Post subject: Re: Cont. 0200 prop pitch Reply with quote

I'm sure you're going to get multiple responses on your questions.

Here's my $0.02... The 74 x 54 prop is a LOT of prop for an O-200, and sounds like it would be suitable as a cruise prop on a clean airframe. (That's not exactly what a Piet is!)

Have you checked ground clearance for the this prop? Recommended is 9" with the longerons level.

I know a lot of the small continentals are using 72" props. I've heard of 72 x 42, 44, etc., so that may be a starting point.

Maybe someone out there has an O-200 powered Piet or GN-1 who can give you some good info on how to re-pitch, etc.

Best of luck!


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PostPosted: Sat Jun 06, 2015 8:45 am    Post subject: Cont. 0200 prop pitch Reply with quote

I am flying GN-1 with C-85 and McCauley 74x41...thus prop was on the A65 this plane started with. I climb well, cruise 63 knots (at) 2250 On Jun 6, 2015 11:44 AM, "Gn1flyer" <Timdonham(at)prodigy.net (Timdonham(at)prodigy.net)> wrote:[quote]--> Pietenpol-List message posted by: "Gn1flyer" <Timdonham(at)prodigy.net (Timdonham(at)prodigy.net)>

I am close to having my Continental 0200 GN1 ready for flight. I bought a used McCauley 1A105 SCM 74X54 prop to use. I plan on taking it to a prop
shop to have it repainted and re-pitched. Any suggestions on what pitch I should have it re-pitched to?




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Gn1flyer



Joined: 04 Jun 2015
Posts: 2

PostPosted: Sat Jun 06, 2015 10:34 am    Post subject: Re: Cont. 0200 prop pitch Reply with quote

I edited my initial post to McCauley 71x54 pitch.

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oldbird



Joined: 23 Apr 2015
Posts: 89

PostPosted: Wed Apr 12, 2017 12:37 am    Post subject: Re: Cont. 0200 prop pitch Reply with quote

I am planning to use a McCauley 71x47 for my Continental C90-90F. Anybody using similar combination? Any suggestions?

Regards

Semih Oksay


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pjb



Joined: 30 Jul 2014
Posts: 19

PostPosted: Fri Apr 28, 2017 4:04 pm    Post subject: Re: Cont. 0200 prop pitch Reply with quote

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


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glen



Joined: 17 Sep 2013
Posts: 143
Location: Oregon Coast

PostPosted: Sat Apr 29, 2017 6:00 am    Post subject: Cont. 0200 prop pitch Reply with quote

Pretty cool! How is performance?😃

Quote:
On Apr 28, 2017, at 5:04 PM, pjb <pjb(at)ornithopter-pilot.com> 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




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pjb



Joined: 30 Jul 2014
Posts: 19

PostPosted: Thu Sep 14, 2017 10:25 am    Post subject: Re: Cont. 0200 prop pitch Reply with quote

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


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PostPosted: Thu Sep 14, 2017 11:53 am    Post subject: Cont. 0200 prop pitch Reply with quote

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(at)ornithopter-pilot.com (pjb(at)ornithopter-pilot.com)> wrote:

Quote:
--> Pietenpol-List message posted by: "pjb" <pjb(at)ornithopter-pilot.com (pjb(at)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  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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paul(at)centralaero.nz
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PostPosted: Thu Sep 14, 2017 12:22 pm    Post subject: Cont. 0200 prop pitch Reply with quote

Hi Guys,
Try talking to Gary at APS props in NZ. He makes very nice wooden 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(at)gmail.com (marcus.zechini(at)gmail.com)> wrote:
Quote:
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(at)ornithopter-pilot.com (pjb(at)ornithopter-pilot.com)> wrote:

Quote:
--> Pietenpol-List message posted by: "pjb" <pjb(at)ornithopter-pilot.com (pjb(at)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 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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errer" target="_blank">http://wiki.matronics.com
===========
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rel="noreferrer" target="_blank">http://www.matronics.com/contribution
===========








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Lorenzo



Joined: 13 Aug 2014
Posts: 27
Location: Tellico Plains, TN

PostPosted: Thu Sep 14, 2017 1:01 pm    Post subject: Cont. 0200 prop pitch Reply with quote

Just a data point for you: 100hp at 2750rpm, 95 mph - arithmetic says you should have a 66/42 prop.


Lorenzo





From: owner-pietenpol-list-server(at)matronics.com <owner-pietenpol-list-server(at)matronics.com> on behalf of pjb <pjb(at)ornithopter-pilot.com>
Sent: Thursday, September 14, 2017 2:25 PM
To: pietenpol-list(at)matronics.com
Subject: Re: Cont. 0200 prop pitch


--> Pietenpol-List message posted by: "pjb" <pjb(at)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 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




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TriScout



Joined: 20 Apr 2009
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PostPosted: Thu Sep 14, 2017 2:53 pm    Post subject: Re: Cont. 0200 prop pitch Reply with quote

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PostPosted: Thu Sep 14, 2017 5:23 pm    Post subject: Cont. 0200 prop pitch Reply with quote

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 props. The 150 cruises about 100mph. Not sure if this helps. I think the figure my prop builder told me was one inch of length equals about 50rpm. Shad
Sent from Yahoo Mail for iPhone
On Thursday, September 14, 2017, 5:00 PM, L. Harris <larharris2(at)msn.com> wrote:
Quote:

Just a data point for you: 100hp at 2750rpm, 95 mph - arithmetic says you should have a 66/42 prop.


Lorenzo





From: owner-pietenpol-list-server(at)matronics.com <owner-pietenpol-list-server(at)matronics.com> on behalf of pjb <pjb(at)ornithopter-pilot.com>
Sent: Thursday, September 14, 2017 2:25 PM
To: pietenpol-list(at)matronics.com
Subject: Re: Cont. 0200 prop pitch


--> Pietenpol-List message posted by: "pjb" <pjb(at)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 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




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taildrags



Joined: 29 Dec 2009
Posts: 1532
Location: Medford, OR

PostPosted: Thu Sep 14, 2017 8:25 pm    Post subject: Re: Cont. 0200 prop pitch Reply with quote

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.

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Air Camper NX41CC "Scout"
A75 power, 72x36 Culver prop
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Heavy Iron



Joined: 15 Sep 2017
Posts: 1
Location: Dundalk, ON

PostPosted: Fri Sep 15, 2017 4:07 pm    Post subject: Re: Cont. 0200 prop pitch Reply with quote

Hi Patricia,

I have a McCauley 71-46 that turns about 2275 static on a C85 if you want to try it. I am based at CGV2 which I think is near you.

Cheers,
Ron


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oldbird



Joined: 23 Apr 2015
Posts: 89

PostPosted: Fri Sep 15, 2017 7:58 pm    Post subject: Cont. 0200 prop pitch Reply with quote

I have a McCauley CM 71-47 and planning to use it on my C90-8F. Do you think it will work?
Regards
Semih Oksay
On Sat, Sep 16, 2017 at 3:07 AM, Heavy Iron <ron.horton1000(at)gmail.com (ron.horton1000(at)gmail.com)> wrote:
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--> Pietenpol-List message posted by: "Heavy Iron" <ron.horton1000(at)gmail.com (ron.horton1000(at)gmail.com)>

Hi Patricia,

I have a McCauley 71-46 that turns about 2275 static on a C85 if you want to try it. I am based at CGV2 which I think is near you.

Cheers,
Ron




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pjb



Joined: 30 Jul 2014
Posts: 19

PostPosted: Sun Sep 17, 2017 2:13 pm    Post subject: Re: Cont. 0200 prop pitch Reply with quote

Heavy Iron wrote:
Hi Patricia,

I have a McCauley 71-46 that turns about 2275 static on a C85 if you want to try it. I am based at CGV2 which I think is near you.

Cheers,
Ron


Hi Ron,

That's very nice of you to let me try your 71-46 but I think it
would be a little too coarse a pitch.

So far I've tried:

The original wood 74-38 which was way too fine. Overspeeded on take-off
and in level flight.

A wood 72-40 which produced full throttle static rpm of 2625
[ we also flight tested this one and it overspeeded in level flight but not on take-off.

A metal 73-45 which produced full throttle static rpm of 2375
[ we didn't flight test this one]

Yes, CGV2 is near me.

Cheers,
Patricia


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