Matronics Email Lists Forum Index Matronics Email Lists
BBS 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 

RV-List: Re: Lycoming O-360 Fuel Flow Rate

 
Post new topic   Reply to topic    Matronics Email Lists Forum Index -> LycomingEngines-List
View previous topic :: View next topic  
Author Message
BARRY CHECK 6



Joined: 15 Mar 2011
Posts: 675

PostPosted: Mon Dec 21, 2015 2:40 pm    Post subject: RV-List: Re: Lycoming O-360 Fuel Flow Rate Reply with quote

Matt:
Start by GREASING the Accelerator Pump on the Carb.  Special Grease is required.  But, for a test, you can use Parker Lube or EZ Turn.
Also check that there are NO air leaks on the carb or intake tubes.
Barry


Quote:
RV-List message posted by: Matt Dralle <dralle(at)matronics.com (dralle(at)matronics.com)>

Quote:


Thank you to everyone that responded!!  There were some great comments that got me going down the right path.  
Last night I got the cowling back on and took the RV-6 out on the runway and ran it up to full power with the intent of carefully watching the flow rate and aborting the take off if the flow wasn't sufficiently high enough.  I'm happy to report that the flow rate climbed nicely up though the teens as my takeoff roll progressed.  I lifted off around 15-16 gph and decided to take it around the pattern.  As I climbed through the crosswind to downwind turn I noted that the flow was in the 18.5gph range, RPM was at 2700, and EGTs were low 1300's.  After a few more loops around the pattern everything seemed to be working as expected.  I took it out of the pattern and dialed it into my normal cruse configuration which is typically 75% power at 2250 RPM and leaned to about 1425 on the hottest EGT.  Everything sounded and felt fine.  Flow was right at 9.5 GPH per usual.
The only weird thing I noticed was at about 1700 RPM.  When I turn from Downwind to Base and go from idle to about 2000 RPM like I usually do, right about 1700 RPM the engine kind of sags and then picks back up.  It is very repeatable.  Strangely there is no sag on the ground after a touch and go when I push the throttle in fast going from idle to full power anymore like there was with the old carb.
Does anyone have any idea what that sag at 1700 is?  Is there a nurd knob on the carb for this specifically?
Thanks again for the great feedback!
Matt Dralle



- The Matronics LycomingEngines-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?LycomingEngines-List
Back to top
View user's profile Send private message Send e-mail
vanremog(at)aol.com
Guest





PostPosted: Tue Dec 22, 2015 2:17 pm    Post subject: RV-List: Re: Lycoming O-360 Fuel Flow Rate Reply with quote

It's just the engineer in me, but I always like to do post mortems with failed components. In the case of the pump, I would want to understand what in the pump caused the blockage or failure to pump per spec. In the case of the carb I would want to understand if the main jet, float, filter or ??? were hosed.

-GV


--


- The Matronics LycomingEngines-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?LycomingEngines-List
Back to top
Display posts from previous:   
Post new topic   Reply to topic    Matronics Email Lists Forum Index -> LycomingEngines-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