Matronics Email Lists Forum Index Matronics Email Lists
Web Forum Interface to the Matronics Email Lists
 
 Get Email Distribution Too!Get Email Distribution Too!    FAQFAQ   SearchSearch   MemberlistMemberlist   UsergroupsUsergroups   RegisterRegister 
 ProfileProfile   Log in to check your private messagesLog in to check your private messages   Log inLog in 

Cannot decrease RPM at high speed

 
Post new topic   Reply to topic    Matronics Email Lists Forum Index -> Yak-List
View previous topic :: View next topic  
Author Message
JL2A



Joined: 07 Apr 2015
Posts: 104
Location: Australia

PostPosted: Fri Jun 14, 2019 3:26 am    Post subject: Cannot decrease RPM at high speed Reply with quote

We have installed the Chinese 3 blade JL2B on a CJ with M14P. It has the small counterweights and spinner.

Propeller behaves normally except that as airspeed increases, the RPM cannot be decreased even with prop control lever all the way aft.

For example, after take off set 80% RPM for cruise climb - then level out and let airspeed increase then the RPM cannot be reduced. At slower airspeeds it will go back to 50-60% depending on airspeed (around 120 KIAS)

Is this a function of the small counterweights?

Or more likely a governor spring or set up issue?


- The Matronics Yak-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?Yak-List
Back to top
View user's profile Send private message Visit poster's website
cjpilot710(at)aol.com
Guest





PostPosted: Fri Jun 14, 2019 7:15 pm    Post subject: Cannot decrease RPM at high speed Reply with quote

Check your low pitch setting. Jim "Pappy" Goolsby

--


- The Matronics Yak-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?Yak-List
Back to top
glipaz



Joined: 11 Jan 2011
Posts: 84

PostPosted: Sat Jun 15, 2019 2:49 pm    Post subject: Re: Cannot decrease RPM at high speed Reply with quote

Did it ever work ok or is this a new install?

- The Matronics Yak-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?Yak-List
Back to top
View user's profile Send private message Send e-mail
JL2A



Joined: 07 Apr 2015
Posts: 104
Location: Australia

PostPosted: Mon Jun 17, 2019 2:05 pm    Post subject: Re: Cannot decrease RPM at high speed Reply with quote

New install.

It is not the low rpm stop setting - it will govern down to 50-60% at low speeds / power. Do you mean the low pitch stop for the blades? It was set up as per the book...

I've read that the whirlwind propellers came with a stronger spring for the governor to give it more oomph - wondering if the symptoms were the same?


- The Matronics Yak-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?Yak-List
Back to top
View user's profile Send private message Visit poster's website
Display posts from previous:   
Post new topic   Reply to topic    Matronics Email Lists Forum Index -> Yak-List All times are GMT - 8 Hours
Page 1 of 1

 
Jump to:  
You cannot post new topics in this forum
You cannot reply to topics in this forum
You cannot edit your posts in this forum
You cannot delete your posts in this forum
You cannot vote in polls in this forum
You cannot attach files in this forum
You can download files in this forum


Powered by phpBB © 2001, 2005 phpBB Group