I have a sport flyers wasp ep trainer. I've been trying to figure out why I can't return to normal flight from inverted flight by doing a "reverse C" maneuver. In other words, from inverted flight, I would apply forward elevator to attempt to return to normal flight.
I have to continue doing a loop or roll out of inverted to return to normal flight.
Is this maneuver impossible or is it just my plane?

thanks in advance

If I understand you correctly you're talking about doing half an outside loop to go from inverted to upright.

Not sure about your's, but some trainers will do so. My Alpha 60 does.

You don't describe your problem very completely but I suspect that when you push the elevator to do your "half outside loop" you simply don't have enough power/speed and the plane simply falls out of the maneuver in a stall. Am I close? You also may not have enough "down" available but too much could also lead to a stall only inverted.

The maneuver is entirely possible for most planes under the correct conditions.

Also this can be difficult with high wing trainers, if they do not carry enough forward speed to create an excess amount of lift.

On many glow trainers I've flown, doing what your attempting with stock setups is almost impossible, unless you've picked up excess speed during an inverted dive.

I'm new to flight and I'm not too familiar with the terminology yet. I've looked up an outside half loop, and this is the correct. I am attempting to perform an inverted outside half loop. I didn't realize my plane needed more power to do it. The plane just stalls whenever I attempt it. I guess a slow flyer isn't suitable for this maneuver.

Yup!

Your trainer probably has a flat wing. An outside loop is difficult to do with a flat wing. But, if you have lots of power it will do it.

Is this your plane?

http://hobbypeople.net/gallery/160521.asp

Is it a brushless motor? Is it powered with a lipo battery?

If not, you don't have the power. switch to a brushless set-up and use a lipo.

Changing props could help. I had a hard time doing outside loops with my (nitro) trainer; I switched from an 11x6 to a 12x5 and was able to do them.

That's the plane. It's on brushless/lipo already. I fly it pretty hard. I had to add popsicle sticks for reinforcement. Does nice tight inside loops.
The wing has an airfoil, but flat on the underside. I'm already using a 10x4.7 can't really use a larger prop because I risk hitting the ground when landing, but mainly because I don't want to overload the esc. I'm gonna switch to a 3S lipo soon, and I'm supposed to get around 600grams thrust with a 8x7 or 9x4 prop. I think it should be interesting once I do that.

i would try to give the elevator as much down throw as possible, maybe move the cg back a little
i have a gws slowstick and brushless that overpoweres the plane 2:1
the plane hates doing inverted outside loops. i have to give it so much throttle that the motor's torque affects the plane. but it helps if you dive a little.
if you cant do it its prob not you, its the plane

I've seen too many pilots get into a LOT of trouble by either pushing or pulling out of inverted flight, including myself. It's a better practice to make it a habit to roll out of inverted flight using your ailerons. The reason is pretty simple. When you push or pull out it's too easy to get "confused" and accidentally pull out. And if you pull back on the stick at low altitude you are going to be picking the balsa pieces out of the dirt. Even though you are trying to push out now, it's easy to get confused when you are at low altitude and need to get out of inverted flight in a hurry. But if you learn to roll out with your ailerons you'll never had to worry about that as the movement of the sticks is the same no matter what attitude you are in.

Just my 2 cents worth.

Ken

oh, the 9x4.7 is for a 3S set up. I'm currently on 2S. I'll try out different props once I get a 3S lipo.

Thanks for your input RCKen. I've been rolling out of inverted. I'm getting bored of it, though. I wanna get this plane do the outside loop.

The 3S should solve your problem.

I agree with Ken...what you pratice now will become habit later....you can do an outside loop from normal flight...you can do a 1/2 outside loop, then roll to normal flight at the bottom of the loop....I have also seen more crashes than I can count from inverted flight, have had a few myself....remember this little ditty..."when in doubt roll out". Might save you a plane someday

I like that.

now, I wonder if I can get this thing to do flat spins and rolling harriers.

Best thing to do when going to do an inverted pass is plan your move before you start the inverted flight. That way you are prepared to do the right thing if something should happen.

Sounds like it is time for a new plane.

Trainers are not good for these types of manouvers as they are purposely designed to be stable flyers and prevent spins, etc.

I agree with you on that one, but I'm currently limited on funds. I was given Parkzone corsair which the owner became frustrated with and crashed, but easily fixable. I'll be working on that next. I do have a 3d plane on my wish list.

The wasp is actually an interesting tainer. It's capable of being built as a stable trainer or more for actrobatics. I first built it with the dihedral as a stable trainer, but I can't fly to well without ailerons. So I flattened the wings and added more servos.

This plane can handle a lot more than most will expect. I'm even able to hover, but only for a short period. Once I switch to a the 3S lipo, it should become a more interesting plane. I've done a google search on this plane and read that people have gotten them to 50+mph.

I agree 100% with RC Ken, when I was flying my alpha 40 with the evo that came with it inverted flight was hard to do, since then I put in a 46ax and now its no problem, and do what Ken said, I always roll out from being inverted, until you have a sport plane to push or pull out of inverted flight I would just roll out and not risk like Ken said, pulling rather than pushing on accident.

...

Outside loops are a part of flying aerobatics and are included in even the most basic aerobatic routines (Double Immelmann). The key is to stay ahead of the plane - have the loop segment and the roll planned out in your head before you execute it. Fly one maneuver at a time, finish it, and be prepared for the next one before you execute.