Ute R/C Association Come on, let's fly!

if you want that airplane to fly, put a brushless system in it. that model was specifically made for sea level
with the 380 motor it currently has. flyzone did make an upgrade motor for it, but still insufficient for this
altitude. I also bought one of these planes when they first came out, it will only fly if you have a super long runway
and let the plane take off by itself, even then it's pretty much a crap shoot, or wait for much cooler weather.

If you're willing to make the trade-off and have sufficient ground
clearance, often you can get decent performance (but short flight
times) simply by upgrading your prop.

As an example, I have a Parkzone J-3 Cub (brushed). It was my very
first airplane. This plane had horrible performance on the stock 8x4
prop. It simply wouldn't climb at all unless the battery was warm
right off the charger; at best you could hand-launch it and it might
maintain altitude or climb extremely slowly. Forget touch-and-goes;
flying the aircraft was an exercise in frustration using the first
minute of flight to s-l-o-w-l-y climb to a suitable altitude, and then
spending the rest of the flight fighting to maintain altitude while
flying in gentle circles and figure-eights.

I traded out the 8x4 prop for a 9x7 prop. Went from 10-minute
flights to 7-minute flights, the performance was just fine. Still not
"stunning" or "excellent" or even "very good", but "not bad". And it
could take off from the ground instead of requiring a hand launch. Of
course, I also had to replace the $8 brushed motor every 100 flights
or so from that point on.

My suggestion would be to try a larger, higher-pitched prop first
before investing in a brushless system, but plan for shorter flights.
I had hundreds upon hundreds of flights on my Cub (some with the wing
on backwards!) by the time I gave it away... and recently, the student
to whom I gave it away gave it back to me rebuilt in better condition
than I gave it to him! I look forward to some lazy flights at the
park... with a suitable propeller for our altitude.

Regards,
Matt B.
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I've tried the prop both ways, I know what you mean about the thrust. thanks for your comments