Home > VansAirForceForums

- Donate yearly (please).
- Advertise in here!

- Today's Posts | Insert Pics

Go Back   VAF Forums > Model Specific > RV-6/6A
Register FAQ Members List Calendar Search Today's Posts Mark Forums Read

Thread Tools Search this Thread Display Modes
Old 07-09-2018, 11:55 AM
daniel_hagan daniel_hagan is offline
Join Date: Oct 2007
Location: El Paso, TX
Posts: 3

Originally Posted by MountainU2 View Post
I shoot for <= 380 CHT, and my usual flying is at 6500 or 7500ft in the SF Bay area. I find my MP at cruise and full throttle is 22-2300, and I set the prop at 2300. Then I lean until peak, keep going until slightly rough, then back in a couple turns. I end up with about a 1250 EGT. Seems like about 130-140 kts IAS is where shes happy.

Fire away.
Mountain, I just got an RV7A and am also switching from 10 years of fixed pitch prop. There's a fellow named Deakin that is real good explaining this. There's a youtube with a guy quoting his graphs that I saw last night, but can't find now.

In that video using Deakin theory, they have a "red box" described as Peak EGT to 100* ROP, as this is the area where the engine is under the most stress *IF* producing 75* power (only at sea level). They recommend 25* LOP or 100* ROP and to try avoiding operating in the "red box". The red box isn't necessarily bad, but can reduce engine life if you're in it all the time (as I imagine a lot of rentals probably are).

In my previous Tiger, leaning your method was EXACTLY the same as attempting to do all of the above, but I was usually at 15* LOP. A lot of carbed engines can't handle lean of peak as fuel flow varies per cylinder if not injected.
Reply With Quote
Old 07-15-2018, 03:42 PM
MountainU2 MountainU2 is offline
Join Date: Aug 2017
Location: Roseville, CA
Posts: 19

Wow. This might be the most helpful series of posts on any forum ever. I really appreciate all the help, and the thought that went into it. And nobody even called me stupid! Thanks.

I have a bit more reading to do, thanks to your posts. Im also very fortunate to have a great RV community at my airport, especially a few guys who have versions of my airplane and a lot more experience with it. I promise Im listening to them. What I hoped for was some technical info I could refer to, and MAN, did I get it.

Again, thanks. Fly safe out there.
RV-6 N91CN
Dues Paid
Reply With Quote
Old 08-05-2018, 08:58 PM
jacksel jacksel is offline
Join Date: Jul 2005
Posts: 111

I have an RV-6 with a carburated O-360 and Hartzell C/S. It's most efficient to run it at full throttle above ~8000 ft during cruide. manifold pressure should be 24" or less. Set cruise RPM ~2400. Try to maintain your Cylinder temps as low as possible, preferably below 350 deg.

Reply With Quote

Thread Tools Search this Thread
Search this Thread:

Advanced Search
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

vB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Forum Jump

All times are GMT -6. The time now is 02:47 AM.

The VAFForums come to you courtesy Delta Romeo, LLC. By viewing and participating in them you agree to build your plane using standardized methods and practices and to fly it safely and in accordance with the laws governing the country you are located in.