I have the US 40, 60 and 120 and none of them have any glass. The US 60 has a YS 91 with a 20 oz. tank and I fly this thing for 30 minutes at a time. What a blast. The wings are holding up just fine. The axles on the landing gear on the other hand have each taken their turns fall off the plane during flight. The axles must have not been pressed on to the nuts very well. Oh well, this thing lands so slow, it has not been much of a problem.

Sung