4500nm Trip with Skyview = no problem.

[Jamie]

I have now returned from a 4500nm trip across Australia and back in my Vans RV-7A.

I would like to say that Skyview worked well for my adventure across OZ.
The only problem I had was #1 cht cable needs to be re-crimped. It would sometime jump into the red zone, just like
an open circuit. The EGT stayed the same, so I knew that it was just a cable problem.

In the middle of Australia, you can see lots of... well nothing, so a good gps and map software is a must.
I have the full moving map software for skyview and the Jepp database with obstacles.
The database has nothing to do with skyview, it all from Jepp. If you are IFR, then this would be great,
However for me as a VFR pilot, I found the database very lacking.

What I found myself doing is set the destination
Airport into skview and used my Ipad for track between all the smaller airfields that are not in the jepp list.
I have the one year service from jepp, when that runs out, I will be looking at pocket FMS as the new database.

The fuel computer is great, I knew how much fuel I needed at each stop within just a few liters.
With the full set of engine probes I was able to get the best out of the lycoming 0-360A1A.
Lean to LOP is easy, just a press of the "lean' button and pull that red knob back.

Here are some shot of the trip, enjoy.

 

[skydancer]

My RV-7 has the same engine like yours, when you LOP, what's your EGT temp? What's the fuel flow at that condition?

Have you ever manually switched your ADAHRS source during the flight and compare the heading difference between the two?

The longest solo X-country trip I made was 10,000 miles, from Southern California to Alaska and return, see my adventure under www.chinesepilots.com

I'll take my newly built RV-7 to Alaska this summer, another solo x-country adventure to look forward....

 

[Jamie]

Hi Jay,
On the first photo of the engine EMS screen. This is WOT at 7500 ft, TAS 168 Kts,2650 RPM, Fuel flow 40 ltrs per hr,  chts 380F Egts 1350 - 1450F

My normal setting for cruise is. LOP.
2350 Rpm, 27 ltrs per hr fuel flow, chts 350F, egts 1350 - 1450F, TAS 145- 150 kts.

I only have one AHRS, I do cross check with my Ipad.

Notes, Carb, 0-360A1A, Catto 3 blade prop fix pitch. One Mag one Electric ignition.

Skyview made my cross country trip easy !

P.S have a look at Jays trip, see link above, Wow that must have been a fun trip !

 

[DBRV10]

My RV-7 has the same engine like yours, when you LOP, what's your EGT temp? What's the fuel flow at that condition?

Jay

Not all Carby engines will behave the same, in fact in Lycoming not all injected engines behave the same, but they are able to have the injectors tuned.

The first thing you have to understand is "An EGT Value" is just a number and it means nothing in absolute terms. The next day it could be different. It is used for trending purposes to detect what is going on in the combustion event. It is like asking me my shoe size when comparing how well we can do maths. So do not get fascinated by comparing EGT values. There is no point. They are a trend gauge for your engine only.

For running Lean of Peak you first need to understand what it is you are doing with your engine. Secondly you will have EGT values changing all the time, as the power rolls off the RPM rolls off and this effects the whole combustion cyclce  a bit and the numbers that were a refernce before are not the same anymore.  :-?

Confused yet?

So basically if you have an 0-360 Lycoming and you have the engine stuff set up right, when you are at cruising altitudes say 6500' and above you should expect LOP operations at about 30 LPH. If you are up around 10,000' you will get a bit less, and lower a bit more.

The trick is to watch your airspeed, it will roll back a bit too so you know you are past best power, then when you see your CHT's dropping you know you are.

The Dynon LOP/ROP display can get confused when using a Carby and Fixed pitch prop. So basically start out at around 75% or a bit more and lean till you see your EGT's peak and start dropping again. You will most likely be right at the point of getting some roughness.

For a complete education http://www.advancedpilot.com/

Regards
David


PS: hey Jamie....that thrid picture down, at 168KTAS...... That was me flogging your baby......ya picture pirate  She sure does go well. 

But there is an educational point, that was not LOP ops but ROP at about 80dF ROP

 

[snowyriver]

Hi Jay! Good to see you're enjoying the RV. Look me up when you get to alaska this summer. Well go do some flying!
Craig
PS check out my site for some ski flying pics from this year.

Sorry to highjack the thread, all but I do have a Skyview.

 

[skydancer]

David,
Thank you very much for the info, there are a lot for me to think about what you have said.

Craig,
I was just thinking about you, heard you got big tires on your Rebel, have you moved to the airpark? is that south of Palmer?
Do you have dual or Single ADAHRS? You probably have seen my post about the problem I have. I haven't solved the problem yet.

 

[Jamie]

LOP,

PS: hey Jamie....that thrid picture down, at 168KTAS...... That was me flogging your baby......ya picture pirate  She sure does go well. 

OK , you get best MAX speed,( 168 kts ) but I still get best LOP 27 Ltrs/ per HR. :

 

[DBRV10]

Two can play that game........