To add this to the group, you must first join the group, which can be found here: http://www.mocpages.com/group.php/20405 . Next, press the button that says join this group (located at the top right). Finally, after joining, click the button that says "Add Your Own" (above the pictures of Lego creations on the group. You will be taken to a page that shows the main picture of each creation you've made. Click on the picture of this, and then click "done adding". Your creation will be added to the group. Hope this helps.
thank you for your comment.
I also would make the tail of the helicopter longer, but in 8858 set there isn' t enough grey technic brik.
how I can add this model to the group "Alternative Designs of a Technic Set?
A neat helicopter - very creative. I agree that the tail should be longer, but other than that it is great. You should add this to the group "Alternative Designs of a Technic Set." It is exactly the type of MOC that the group is about.