N45678 Cruise testing - Page 2

vinodwahi · #11 07-13-2012, 01:38 AM

Can I ask a question, I?m a little bit confused.
Why does the flap positioning also have an indication for -5??

Cheers
Sunit

pierre smith · #12 07-13-2012, 04:39 AM

Hi Sunit...the RV-10's have their flaps in the "reflex" position...three degrees up from the normal in trail position. The wing produces excess lift at cruise speeds and would fly too nose down if the flaps were not raised the three degrees.

It also adds a few MPH to the cruise speed.

Best,

n468ac · #13 07-13-2012, 05:24 AM

I would try and swamp the #5 egt probe with the coldest lop cyl ... Just to make sure the probe is not reading off.

vinodwahi · #14 07-13-2012, 06:27 AM

thanks Pierre, never heird about it before

pierre smith · #15 07-13-2012, 08:35 AM

Yep, on all the other RV's, the ailerons are rigged in line with the wing chord, then the flaps are adjusted to match them.

On the -10's, the flaps are adjusted all the way up until the spar touches the wing...3 degrees up and then the ailerons are adjusted to match them.

I believe some Lancairs also have some flap reflex.

Best,

Wayne Gillispie · #16 07-13-2012, 08:55 AM

at 65%, running smooth, 10-35 LOP, stock engine/mags. Flew approx 700 nm on 48 gallons on our first long xc to Florida. It took us approx 4.5 hours. That is maximum safe range for us and our bladders no matter what Van's numbers are. Injectors not balanced and not planning to balance. Balancing would be good for one specific flying condition/setting which I will never fly. It gets better mileage than our Expedition and no more tractor/trailers blocking both lanes of I-75. At this time fuel cost was about the same whether driving or flying. If fuel goes up I will still fly but just take fewer trips.

Mike S · #17 07-13-2012, 09:08 AM

13,500' altitude, 9.5 gph, 212 gs, 22.2 mpg.

Wesael · #18 07-13-2012, 09:15 AM

Total Nautical Miles = 1358
Total Fuel Used = 96.4
Avg NM/Gal = 14.1
Avg stat. MPG = 16.2

This was from a trip from Mississippi to Virgina to Ohio to Mississippi all in one day.

Includes 3 take off and landings.

I took the MPG widget off my EFIS because Winds effect is so I feel it is not usefull for general knoledge of what milage the airplane acutally gets and does not include take off and landings.

Mike S · #19 07-13-2012, 09:31 AM

Quote:

Originally Posted by Wesael

I took the MPG widget off my EFIS because Winds effect is so I feel it is not usefull for general knoledge of what milage the airplane acutally gets and does not include take off and landings.

Totally agree that it is just a snapshot of the conditions at the moment.

But I used it as a tool to help learn how to maximize the efficiency of the plane on long cross country trips. Paul Dye had made the suggestion a while before.

I now have also reset the readout to TAS, but while I was using MPG, it was a good way to see exactly what was going on with different flight parameters.

Wesael · #20 07-13-2012, 09:34 AM

Quote:

Originally Posted by Mike S

Totally agree that it is just a snapshot of the conditions at the moment.

But I used it as a tool to help learn how to maximize the efficiency of the plane on long cross country trips. Paul Dye had made the suggestion a while before.

I now have also reset the readout to TAS, but while I was using MPG, it was a good way to see exactly what was going on with different flight parameters.

I see what you mean. Good idea.