Hi,

About how much run time can you get out of an 11 oz tank on a 40 size engine?

I get between 10 and 15 minutes with a 10 oz tank on a .46. But it will depend heavily on your flying style and where you've got the throttle... wide open or just cruising around at about 1/3 open.

Also be aware that "air" minutes seem much longer than "ground" minutes... I'll fly around for what seems like forever, land, and find out I've only been up 10 minutes.

depends on how you fly......


but 10 to 12 minutes probably......

Just guessing

11 oz, i think thats around 300gr or someting. Thats a lot of fuel for a 40 sizer. 20min someting. 7-9oz or someting is better for a 40 sizer.

I just put 18 minutes by the 9C's throttle timer on a .50 with a 10 oz (300 ml) tank at 2/3 throttle. The throttle arm broke loose in flight. That's a loooooong flight.

As mentioned, it depends on how nuch throtte you use, cleanness of drag, richness/leanness of mix.

Figure 15 minutes at least for a "routine" flight. You could probably stretch it much farther if you deliberately try and keep her up and glide a lot. We used to do that in the two channel days.

Thanks everyone!

I bought a basket case GP Trainer 40, all framed up, not finished or covered. I fixed building errors and hangar rash, covered it and used the old OS .40 SF to fly it. Wonderful flying plane, aerobatic capabilities, but stable enough for training. One student liked it better than his NexStar.

The fuel tank was an 8 oz unit, and I once ran 17 minutes on a tank & landed with power on. Didn't pump much out... and it was a part-throttle training flight, but you get the idea. You'll get plenty long flights with yours, even with a small tank.

Sure wish I'd paid more attention to the battery connector on that trainer....

Dave Olson