What do you flight plan for cruise speed and fuel burn?
 

What do you folks use for cruise speed and fuel burn when planning a cross country in the RV-12?

I would really appreciate any and all experienced input, thanks!

Cruising at 3000'msl 5450 RPM 5.5 gals an hour.:) Lower RPM means lower gals per hour!

Thanks for the info!

So?one guy told me 5140 rpm (about 21MAP) produces 4.5 gph. That sound right? (for planning).

Thanks again.

Fuel burn
 

Can't give you much on cruise speed since I just made by first flight about a week ago but I have 1000 hours on the same engine in my other airplane and that burn sounds right.

I cruise @5000 rpm and get consistent 4.2-4.3 gal/hr. @5200 rpm, 4.6 - 4.8 gal/hr. @5500 rpm, 5.5-5.6 gal/hr.

The RV-12 is faster but WOT on both are about the same.

Bill

Thanks a lot Bill!;)

You will need to refine the numbers for your own airplane, and your cruising habits, because there are just two many variables to quote a "standard" number. For example:

Prop pitch, which affects RPM vs. MP ratio.
Desired cruise speed.
Cruising altitude.

The nice thing is, you can fly this engine/airplane combination at a wide range of power settings, depending on your mission that day. Going somewhere in a hurry? WOT at high altitude. Local sightseeing? Low power, low fuel burn, low speed.

I plan at 114 kts and 5 gal/hr. Prop pitch affects these.

Look in the POH. Should be listed there after initial flight test determines the numbers for your aircraft.

5100 RPM, 20-21" MAP, 110 KTAS, 4.5 GPH. Very consistent numbers for my plane.

I haven't picked my airplane from Vans yet so I don't have access to POH.

I appreciate the actual working numbers from experienced owners as I start planning flying trips. Thanks guys!