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Prop pitch

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stokesc(at)wildblue.net
Guest

Posted: Thu Oct 09, 2008 9:33 pm Post subject: Prop pitch

I have a GSC 3-blade ground adjustable prop.

 If my memory has not failed me I orginally

 set the prop angle at 10 deg at 75 deg of radius.

 The static rpm is 6800 which is max rpm.

 I think the static should be 6200.  When

 increasing the pitch to reduce static rpm

 how many degrees change is there

 for, say, each 100 rpm's?

 Thanks for any insight.

  

 Cecil 

 Md 4 582 1050

 C gear box 

  



  [quote][b]

- The Matronics Kitfox-List Email Forum -

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djwild2(at)hotmail.com
Guest

Posted: Fri Oct 10, 2008 5:34 am Post subject: Prop pitch

Cecil,

 I just did the same thing a few  weeks ago. In the end it took 1.5 deg. increase to get the right (6200)  rpms.

 It is much better that way. Eng.  temp are lower and a faster cruise. 

  

 Dan Wild

 mdl1 532

 GSC prop

  



  From: Cecil Stokesberry (stokesc(at)wildblue.net) 

 Sent: Friday, October 10, 2008 12:31 AM

 To: Kitfox (Kitfox-list(at)matronics.com) 

 Subject: Prop pitch

 



  I have a GSC 3-blade ground adjustable prop.

 If my memory has not failed me I orginally

 set the prop angle at 10 deg at 75 deg of radius.

 The static rpm is 6800 which is max rpm.

 I think the static should be 6200.  When

 increasing the pitch to reduce static rpm

 how many degrees change is there

 for, say, each 100 rpm's?

 Thanks for any insight.

  

 Cecil 

 Md 4 582 1050

 C gear box 

  



[quote]



href="http://www.matronics.com/Navigator?Kitfox-List">http://www.matronhref="http://forums.matronics.com">http://forums.matronics.com

href="http://www.matronics.com/contribution">http://www.matronics.com/c

[b]

- The Matronics Kitfox-List Email Forum -

Use the List Feature Navigator to browse the many List utilities available such as the Email Subscriptions page, Archive Search & Download, 7-Day Browse, Chat, FAQ, Photoshare, and much more:

http://www.matronics.com/Navigator?Kitfox-List

matronics(at)bob.brennan.
Guest

Posted: Fri Oct 10, 2008 5:41 am Post subject: Prop pitch

Dan - 1.5 degree increase to what final  setting?

  

  Bob Brennan - N717GB  1991 UK Model 2 ELSA  Kitfox

 Rotax 582 with 3 blade  prop

 Wrightsville  Pa  



   From: owner-kitfox-list-server(at)matronics.com  [mailto:owner-kitfox-list-server(at)matronics.com] On Behalf Of Daniel  Wild

Sent: 10 October 2008 9:27 am

To:  kitfox-list(at)matronics.com

Subject: Re: Prop  pitch

 

 Cecil,

 I just did the same thing a few  weeks ago. In the end it took 1.5 deg. increase to get the right (6200)  rpms.

 It is much better that way. Eng.  temp are lower and a faster cruise. 

  

 Dan Wild

 mdl1 532

 GSC prop

  



  From: Cecil Stokesberry (stokesc(at)wildblue.net) 

 Sent: Friday, October 10, 2008 12:31 AM

 To: Kitfox (Kitfox-list(at)matronics.com) 

 Subject: Prop pitch

 



  I have a GSC 3-blade ground adjustable prop.

 If my memory has not failed me I orginally

 set the prop angle at 10 deg at 75 deg of radius.

 The static rpm is 6800 which is max rpm.

 I think the static should be 6200.  When

 increasing the pitch to reduce static rpm

 how many degrees change is there

 for, say, each 100 rpm's?

 Thanks for any insight.

  

 Cecil 

 Md 4 582 1050

 C gear box 

  



[quote]



href="http://www.matronics.com/Navigator?Kitfox-List">http://www.matronhref="http://forums.matronics.com">http://forums.matronics.com

href="http://www.matronics.com/contribution">http://www.matronics.com/c





href="http://www.matronics.com/Navigator?Kitfox-List">http://www.matronhref="http://forums.matronics.com">http://forums.matronics.com

href="http://www.matronics.com/contribution">http://www.matronics.com/c

[b]

- The Matronics Kitfox-List Email Forum -

Use the List Feature Navigator to browse the many List utilities available such as the Email Subscriptions page, Archive Search & Download, 7-Day Browse, Chat, FAQ, Photoshare, and much more:

http://www.matronics.com/Navigator?Kitfox-List

djwild2(at)hotmail.com
Guest

Posted: Fri Oct 10, 2008 6:11 am Post subject: Prop pitch

Bob,

 I'm actually not sure what the  final pitch was or how to figure that exactly. I just used one of those round  prop pitch tools with a bubble in the middle. I marked where the current pitch  was and then started increasing the pitch. first I went two deg. then ran the  engine. It was 5800 or so. then decrease one deg still ran 6500 or so. so I  ended up with total 1.5 deg. increase. I have never tried to set a prop. to a  certain pitch. I always run the engine, too slow decrease pitch too fast  increase pitch and then make sure all blades are exactly the same.

  

  Dan Wild

 mdl1 532

 GSC prop



  

  



  From: Bob Brennan (matronics(at)bob.brennan.name) 

 Sent: Friday, October 10, 2008 8:39 AM

 To: kitfox-list(at)matronics.com (kitfox-list(at)matronics.com) 

 Subject: RE: Prop pitch

 



 Dan - 1.5 degree increase to what final  setting?

  

  Bob Brennan - N717GB  1991 UK Model 2 ELSA  Kitfox

 Rotax 582 with 3 blade  prop

 Wrightsville  Pa  



   From: owner-kitfox-list-server(at)matronics.com (owner-kitfox-list-server(at)matronics.com)  [mailto:owner-kitfox-list-server(at)matronics.com] On Behalf Of Daniel  Wild

Sent: 10 October 2008 9:27 am

To: kitfox-list(at)matronics.com (kitfox-list(at)matronics.com)

Subject:  Re: Prop pitch

 

 Cecil,

 I just did the same thing a few  weeks ago. In the end it took 1.5 deg. increase to get the right (6200)  rpms.

 It is much better that way. Eng.  temp are lower and a faster cruise. 

  

 Dan Wild

 mdl1 532

 GSC prop

  



  From: Cecil Stokesberry (stokesc(at)wildblue.net) 

 Sent: Friday, October 10, 2008 12:31 AM

 To: Kitfox (Kitfox-list(at)matronics.com) 

 Subject: Prop pitch

 



  I have a GSC 3-blade ground adjustable prop.

 If my memory has not failed me I orginally

 set the prop angle at 10 deg at 75 deg of radius.

 The static rpm is 6800 which is max rpm.

 I think the static should be 6200.  When

 increasing the pitch to reduce static rpm

 how many degrees change is there

 for, say, each 100 rpm's?

 Thanks for any insight.

  

 Cecil 

 Md 4 582 1050

 C gear box 

  



[quote]



href="http://www.matronics.com/Navigator?Kitfox-List">http://www.matronhref="http://forums.matronics.com">http://forums.matronics.com

href="http://www.matronics.com/contribution">http://www.matronics.com/c





href="http://www.matronics.com/Navigator?Kitfox-List">http://www.matronhref="http://forums.matronics.com">http://forums.matronics.com

href="http://www.matronics.com/contribution">http://www.matronics.com/c





href="http://www.matronics.com/Navigator?Kitfox-List">http://www.matronhref="http://forums.matronics.com">http://forums.matronics.com

href="http://www.matronics.com/contribution">http://www.matronics.com/c

[b]

- The Matronics Kitfox-List Email Forum -

Use the List Feature Navigator to browse the many List utilities available such as the Email Subscriptions page, Archive Search & Download, 7-Day Browse, Chat, FAQ, Photoshare, and much more:

http://www.matronics.com/Navigator?Kitfox-List

Fox5flyer
Guest

Posted: Fri Oct 10, 2008 6:17 am Post subject: Prop pitch

5800 static is even better.

  

 Deke Morisse

Mikado Michigan

S5/Subaru/CAP  397+ TT

"The aim of an argument or discussion should not be victory, but  progress."

- Joseph Joubert

  

 

 

 [quote]   ---

- The Matronics Kitfox-List Email Forum -

Use the List Feature Navigator to browse the many List utilities available such as the Email Subscriptions page, Archive Search & Download, 7-Day Browse, Chat, FAQ, Photoshare, and much more:

http://www.matronics.com/Navigator?Kitfox-List

matronics(at)bob.brennan.
Guest

Posted: Fri Oct 10, 2008 7:40 am Post subject: Prop pitch

Thanks Dan,

  

 I was just curious since I wasn't the one that pitched my  prop, although it seems to be set well. The logbook shows "changed prop pitch to  13.5 degrees" early on and I assume that hasn't changed. It is placarded "Max  RPM = 6500" and at WOT and 55 mph best rate of climb it goes to about 6300 and I  always reduce to 6000 when I get at least 300 ft off the ground just to get a  more comfortable angle in my seat. 75 mph cruise goes with about 5500 rpm in  level flight.

  

 Just trying to relate that all to prop pitch, now that I  know from this list how a fraction of a degree can make a lot of difference to a  lot of things.

  

  Bob Brennan  - N717GB  1991 UK  Model 2 ELSA Kitfox

 Rotax 582 with 3 blade prop (GSC ground-adjustable)

 Wrightsville Pa  



   From: owner-kitfox-list-server(at)matronics.com  [mailto:owner-kitfox-list-server(at)matronics.com] On Behalf Of Daniel  Wild

Sent: 10 October 2008 10:10 am

To:  kitfox-list(at)matronics.com

Subject: Re: Prop  pitch

 

 Bob,

 I'm actually not sure what the  final pitch was or how to figure that exactly. I just used one of those round  prop pitch tools with a bubble in the middle. I marked where the current pitch  was and then started increasing the pitch. first I went two deg. then ran the  engine. It was 5800 or so. then decrease one deg still ran 6500 or so. so I  ended up with total 1.5 deg. increase. I have never tried to set a prop. to a  certain pitch. I always run the engine, too slow decrease pitch too fast  increase pitch and then make sure all blades are exactly the same.

  

  Dan Wild

 mdl1 532

 GSC prop



  

  



  From: Bob Brennan (matronics(at)bob.brennan.name) 

 Sent: Friday, October 10, 2008 8:39 AM

 To: kitfox-list(at)matronics.com (kitfox-list(at)matronics.com) 

 Subject: RE: Prop pitch

 



 Dan - 1.5 degree increase to what final  setting?

  

  Bob Brennan - N717GB  1991 UK Model 2 ELSA  Kitfox

 Rotax 582 with 3 blade  prop

 Wrightsville  Pa  



   From: owner-kitfox-list-server(at)matronics.com (owner-kitfox-list-server(at)matronics.com)  [mailto:owner-kitfox-list-server(at)matronics.com] On Behalf Of Daniel  Wild

Sent: 10 October 2008 9:27 am

To: kitfox-list(at)matronics.com (kitfox-list(at)matronics.com)

Subject:  Re: Prop pitch

 

 Cecil,

 I just did the same thing a few  weeks ago. In the end it took 1.5 deg. increase to get the right (6200)  rpms.

 It is much better that way. Eng.  temp are lower and a faster cruise. 

  

 Dan Wild

 mdl1 532

 GSC prop

  



  From: Cecil Stokesberry (stokesc(at)wildblue.net) 

 Sent: Friday, October 10, 2008 12:31 AM

 To: Kitfox (Kitfox-list(at)matronics.com) 

 Subject: Prop pitch

 



  I have a GSC 3-blade ground adjustable prop.

 If my memory has not failed me I orginally

 set the prop angle at 10 deg at 75 deg of radius.

 The static rpm is 6800 which is max rpm.

 I think the static should be 6200.  When

 increasing the pitch to reduce static rpm

 how many degrees change is there

 for, say, each 100 rpm's?

 Thanks for any insight.

  

 Cecil 

 Md 4 582 1050

 C gear box 

  



[quote]



href="http://www.matronics.com/Navigator?Kitfox-List">http://www.matronhref="http://forums.matronics.com">http://forums.matronics.com

href="http://www.matronics.com/contribution">http://www.matronics.com/c





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href="http://www.matronics.com/contribution">http://www.matronics.com/c





href="http://www.matronics.com/Navigator?Kitfox-List">http://www.matronhref="http://forums.matronics.com">http://forums.matronics.com

href="http://www.matronics.com/contribution">http://www.matronics.com/c





href="http://www.matronics.com/Navigator?Kitfox-List">http://www.matronhref="http://forums.matronics.com">http://forums.matronics.com

href="http://www.matronics.com/contribution">http://www.matronics.com/c

[b]

- The Matronics Kitfox-List Email Forum -

Use the List Feature Navigator to browse the many List utilities available such as the Email Subscriptions page, Archive Search & Download, 7-Day Browse, Chat, FAQ, Photoshare, and much more:

http://www.matronics.com/Navigator?Kitfox-List

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