|국가/구분||United States(US) Patent 등록|
|미국특허분류(USC)||244/003.29 ; 244/003.24|
|발명자 / 주소|
|출원인 / 주소|
|대리인 / 주소||
|인용정보||피인용 횟수 : 10 인용 특허 : 12|
A fold-out fin has a fin geometry defined by two cross-sectional cuts through the cylindrical projectile body, both cuts being parallel to the boattail surface. This geometry insures that the stowed fin assembly fits within the gun tube. This geometry also exhibits low drag and good aerodynamic behavior. Upon launch, the fins are deployed and then locked in the fully open position with a spring loaded pin.
[ What is claimed is:] [1.] A projectile comprising:a cylindrical projectile body having a longitudinal axis and a tapered non-conical boattail;at least two elliptical fins, each of the fins having a size and a shape defined by two parallel planes that intersect the projectile body at an angle parallel to the boattail; andhinges for connecting each of the fins to the boattail.