i have been trying to do snap rolls with my duraplane, but i haven't had the best experience so far.

the first one i did was really good, i even amazed myself, but then i tried another and i don't know if i did it wrong, too fast or what, but anyway it ended up in a spin. after 2 rotation i figured out it was in a spin and recovered. i have never done one with an R/C, but i have in full scale so recovery was a breeze.

so i tried again and again it spun.

what is the proper way to perform snap rolls. is there a free online resoure that says how to do these?? i am also learning aerobatics in a full scale SD now, so maybe i will just wait until i learn everything really well there first????

try www.3drc.info for infos on rc aerobatics.
Not too sure about your planes capability to do aerobatics.

me either, it isn't supposed to. maybe i will buy the wing for the Durabat and try that.

thanks for the link, i am gonna check it out now.

it does do inverted flight, although it is a fight at full throttle; aileron rolls are a breeze and look good, haven't tried a slow roll yet; loops are loops; spins are spins; i tried a hammerhead, but it was getting dark, and my perception was getting screwy so it was rolling up to vertical and i stopped it then and landed

These are the 4 snap roll inputs...Try each a couple times. See which one you like the most and which one throws the airplane around the best! Get your elevator, rudder, and aileron throws set as high as you can handle.

Right positive- Full up elevator, full right rudder, full right aileron, and full throttle.

Left positve- Full up elevator, full left rudder, full left aileron, and full throttle.

Right negative- Full down elevator, full right rudder, full right aileron, and full throttle.

Left negative- Full down elevator, full left rudder, full left aileron, and full throttle.

Then take each one of those, and use opposite aileron for each of those 4 with full inputs on everything. It's called a snap roll because you're supposed to just "snap" the sticks. Don't hold the input, just for a second.

As far as spins go, just HOLD those inputs from a high altitude and watch her spin down...

If there is any other manuevers you're wondering about, just ask. This is when it starts to get fun...

I was able to do it yesterday with my Superstar 40 I didn't think it would do it.

I don't think that this is true. A snap roll is not an R/C only maneuver and has been around a very long time. I doubt that it was named after the sticks on an R/C transmitter.

A snap roll is an accelerated stall with a one revolution spin. I believe that a "true" snap roll is done with just elevator (possibly with some rudder to control the direction of the spin).

To get a true snap roll, you need enough elevator throw that you can change the angle of attack enough to stall the wing at high speed. In fact, one of the main symptoms of a plane with too much elevator throw is that it will do a snap roll at the top of a loop with no rudder or aileron input. When I set up a plane for aerobatics, I set up the low rate elevator throw so that it won't quite do the snap at the top of the loop, and then set the high rate high enough that I can snap the plane at any time with a full elevator pull.

That said, the control inputs that you listed will work great for most planes. If the original poster's plane won't snap using them, then it might be time to add a bit more elevator throw. Take care while doing this, that you keep the plane comfortable to control. Add a little bit of elevator at a time.

Thanks,
-Wade

i am flying full scale aerobatics now in a Super Decathlon and a snap roll is an accelerated stall and spin on the horizontal plane, rather than vertical like a normal spin.

the inputs for a real plane are full rudder and full aft at the same time.

i think i was going too slow cuz when i talked to my acro instructor today about it, she said i probably wasn't going fast enough.

For both full scale and models, snap rolls can be done in any direction, not just horizontal, although most texts tend to describe a basic snap roll as a full power horizontal spin.

You will also find that most RC models fly differently and are not set up the same as full scale planes. Virtually all full scale planes will do an accelerated stall, but it is a rare (except for 3D) RC model that will do an accelerated stall. The reason is, you can not tell the approach to a stall in a model, feel the burble, so to speak. For this reason, most all models are set up to do a tight loop or turn at full up elevator rather than enter an accelerated stall.

The lack of an accelerated stall is why we normally use ailerons to help start the rotation and a lot of rudder for snaps. (I was watching the world acro champs one year on TV and noticed those pilots use aileron in snaps like we do. It helps keep them on line.) You may also find that many models will barrel roll for a half to 3/4 of a turn before breaking into a snap. This also makes them hard to stop on a heading unless the wings are very light (no inertia).

thanks for the info