[bardd]

Disclaimer: I'm a guy, this post is based on what I saw in my team and other teams, as well as my experience as a crew leader..

First of all, talk to your captains and\or crew leader. Tell them what you feel and ask them to help you. Making them aware will make a big difference. Talking to your mentors can help too.
Secondly, try to "force" yourself over the team. When you want to say something, make sure everyone around you is aware (of the "hey guys, I have an idea!" sort). When something needs to be done, do it. Don't wait for someone to ask you.

The problem you have is actually pretty common. In teams where girls are a minority, they usually have a harder time fitting in than guys. The problem is, when there aren't many girls on the team it's easy for stigmas like "mechanical stuff is for guys" to stick.