 |
Matronics Email Lists
Web Forum Interface to the Matronics Email Lists
|
| View previous topic :: View next topic |
| Author |
Message |
dlm34077(at)gmail.com
Guest
|
 Posted: Fri Jul 21, 2017 4:57 am Post subject: leaning |
 |
|
I use 2250 RPM as that is the IO540 best torque point. I also use about 22.5 MP or FT. This provides about 60% and LOP fuel flows about 9 gph and 150KTAS. I have had the aircraft to 17000 MSL over the four corners area and showing about 50%, KTAS 150 and flow of slightly under 9 gph. Try best torque RPM to achieve 150 KTAS and flows of about 9 gph. The running is smooth and saves 1-3 gph by giving up about 10 KTAS.
Don't know the top speed having never been there. When I see 25 gph flow for FT takeoff; I begin to think about leaning; With two people it will climb faster than a spam can even at 55-60%.
David McNeill
N46007
| | - The Matronics RV10-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?RV10-List |
|
|
|
| Back to top |
|
 |
Mauledriver(at)nc.rr.com
Guest
|
| Posted: Fri Jul 21, 2017 5:52 am Post subject: leaning |
|
|
I run about the same; 2200-2300 RPM and FT. I can get 9.2 gph and
150KTAS at 9,000 and above but I now aim for 155KTAS which takes the
fuel flow to 10.0 to 10.6. Nice know that the best torque point is
around 2250 because I've arrived at that figure by 'feel' (?).
Generally if I have a headwind I'll run more fuel thru it to get 155
-160KTAS and if a strong tailwind I roll the fuel back to do 150-155KTAS.
What I do on the climb is FT with a roll back from 2700 to 2600 once the
climb is established. Then at 1500 to 2000MSL I hit the leaning
function on my GRT. Once all cylinders' EGT falls to -10F I start
leaning to keep it there.
dAs I understand it, the thinking behind that is that the engine is
setup so that full rich and FT at sea level is safe in terms of cylinder
cooling and detonation. Then as you climb the engine at full rich is
progressively too rich. Waiting until 2000MSL then letting the EGTs
fall 10F keeps things conservatively rich (ROP) at which point I begin
leaning to stay there. I get some significant fuel flow savings on the
climb with flows dropping below 20gph before climbing thru 9k.
On 7/21/2017 8:54 AM, dlm wrote:
| Quote: | I use 2250 RPM as that is the IO540 best torque point. I also use
about 22.5 MP or FT. This provides about 60% and LOP fuel flows about
9 gph and 150KTAS. I have had the aircraft to 17000 MSL over the four
corners area and showing about 50%, KTAS 150 and flow of slightly
under 9 gph. Try best torque RPM to achieve 150 KTAS and flows of
about 9 gph. The running is smooth and saves 1-3 gph by giving up
about 10 KTAS.
Don't know the top speed having never been there. When I see 25 gph
flow for FT takeoff; I begin to think about leaning; With two people
it will climb faster than a spam can even at 55-60%.
David McNeill
N46007
|
---
This email has been checked for viruses by Avast antivirus software.
https://www.avast.com/antivirus
| | - The Matronics RV10-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?RV10-List |
|
|
|
| Back to top |
|
|
|
|
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
|
Get Email Distribution Too!
FAQ
Search
Memberlist
Usergroups
Register
Profile
Log in to check your private messages
Log in
