Answer
They cannot form stable bilayers.
Work Step by Step
The size of a lipid head is much larger than a hydrocarbon tail so shape of molecule is a cone not a cylinder and molecules form micelles (spherical structures), not bilayers
You can help us out by revising, improving and updating this answer.
Update this answerAfter you claim an answer you’ll have 24 hours to send in a draft. An editor will review the submission and either publish your submission or provide feedback.