Thanks!
WITHOUT GLUE ! I tried to see a little.
The normal Vampire would be this:
My son Jacky (8 years old) invented the push-pull Vampire! Turning or whirling or something, but fast!
Then Jacky invented the Vampire biplane:
And at last Jacky invented the tandem wing Vampire:
Now I will try my way, but maybe transformed a little because I feel lazy, maybe I will not truncate the wings.