With no photo or details as to what you're referring to, I'll say YES
. You could modify the window hinge so that opening the emergency exit, the frame falls out of the frame. You could also build a prop that has both ends lock into place so the prop isn't dislodged. Another strategy, hang an escape hammer near the window and just break the glass out of the frame, no need to prop open the window to escape.
You might go to 'User CP' and add details about your Jayco RV in your signature. You left a pretty big gap in information in your question.