Pointed or blunt nosecone

Pointed or blunt nosecone

Post by John Bolen » Fri, 20 Dec 1996 04:00:00



Most of the commercial nosecones are blunt instead of pointed.  Is this
for safety, ease of manufacturing, or is there an aerodynamic reason?
--
John Bolene
OKC Tripoli Secretary

OKC Tripoli Web page
http://www.flash.net/~jbolene/okc-trip.htm

 
 
 

Pointed or blunt nosecone

Post by Bob Kapl » Sun, 22 Dec 1996 04:00:00


Quote:

> Most of the commercial nosecones are blunt instead of pointed.  Is this
> for safety, ease of manufacturing, or is there an aerodynamic reason?

For subsonic flight, rounded is best. Look at the front of any commercial
aircraft (except of courst, the supersonic concorde...) for shapes. Something
parabolic to elliptical is a good choice. An Ogive isn't bad, and a cone
somewhat worse.

At transsonic and supersonic speeds, you want a pointed tip. There ogives and
cones are better than the parabolic and elliptical shapes.

Most model rockets, LMR, and HPR are quite subsonic, thus rounded. Sharp points
are easilly damaged, and probably somewhat harder to mold well.

        Bob Kaplow      NAR # 18L       TRA # "Abort, Retry, Fail?"