I would like to ask permission to use the image(CAD model) of a helicopter rotor head for a paper I am writing for a grade at East Carolina University. From whom may I obtain this permission? The paper is fictitious as it is for a minor grade in a technical writing course. The format is the important thing only, but the image is perfect for my needs and would save me a lot of trouble attempting to recreate something similar.
Thank you,
Stephen Fister