Name for Certain Technique?

[fftransform]

Does anyone know if this sort of . . . fingered octave 'leaping' that shows up in various pieces has a name?

Also, has anyone ever been instructed as to how to practice such things to get the speed up, or is there no trick?  I have dithered around with the Ce qu'a vu le vent d'ouest for a long time without feeling like my accuracy in that passage has improved much at all.  I have no useful experience with such figures like from Fusees, as shown below, but am curious whether it uses similar ideas.

(And this should be obvious, but with respect to practicing them, please only respond if you actually know what you are talking about)

[mike_lang]

Does anyone know if this sort of . . . fingered octave 'leaping' that shows up in various pieces has a name?

Also, has anyone ever been instructed as to how to practice such things to get the speed up, or is there no trick?  I have dithered around with the Ce qu'a vu le vent d'ouest for a long time without feeling like my accuracy in that passage has improved much at all.  I have no useful experience with such figures like from Fusees, as shown below, but am curious whether it uses similar ideas.

(And this should be obvious, but with respect to practicing them, please only respond if you actually know what you are talking about)

I'm not aware of a name for it.

Getting the whole thing to speed involves a rotary movement like turning a door knob. If I examine slowly what my RH is doing in speed, I have a rapid L-R series of such movements.

And of course, you'll want to keep it light.

[adodd81802]

As stated wrist rotation for this so I don't think you're actually using your individual thumb / fingers to depress any notes as such but using the momentum of your rotating wrist to bring your thumb and finger down onto the notes

You can hold your hand in the same position and simply shift your hand up and down the keyboard

I find it personally easier to do 1/4 - 1/5, and for any sharps/flats to have rather flat, outspread fingers

[rmbarbosa]

I dont know if this is the answer you wish but if you lift your RH in <>45º and rotate it, you can attain a greater amplitude because de circle is gretar than the diameter. This is the Cartwelling, I think.
I must apologize my English, I`m not a native....

[lostinidlewonder]

Lightness of thumb, this is like playing arpeggios. I've never found these to be really technically challenging especially if there is a repeated note in the transfer.