i'm pretty sure that this is not the right place to ask this but it is the closest relevant one i can find...
i thought it might be a good idea to use a convert template like is used on wikipedia... since the flightgear wiki and wikipedia both use the same software, using the same convert template should be relatively easy... i just don't know how to go about creating a new template on wikis... so, please see my flightgear wiki talk page for an example and links to the template on wikipedia...