Because Challenger was not originally intended to be a
flight article. They discovered early on the it would take
more money to bring Enterprise up to Orbiter status than
the OV 99 frame so they took OV 99 and named it Challenger.
OV 99 was originally just a test article.
Because Challenger started out as a structural test article, and only
later was the decision made to rebuild it into a full orbiter.
--
Being the last man on the Moon is a | Henry Spencer he...@spsystems.net
very dubious honor. -- Gene Cernan | (aka he...@zoo.toronto.edu)
Enterprise was the first flight test article. Challenger started
out life as STA-099, or Structrual Test Article 099. After the
flight tests (approach and landing tests, or ALT), modifications
were identified that went into OV-102, Columbia. After that, it
was determined that the modifications would cost too much money to
implement on OV-101, Enterprise, so it was decided to upgrade the
STA to an OV. There are, BTW, OV-098 and OV-097.
MPTA-098 ("OV-098") was the Main Propulsion Test Article.
-097 is, if memory serves, the SAIL lab avionics system at JSC.
Also, technically, the Structural Spares that replaced the ones used to
build OV-105 Endeavour, are classified as OV-106.
I'd cite both Dan Jenkins book and the NSTS Reference, but I'm
too tired tonight to look them up.
Roger
>MPTA-098 ("OV-098") was the Main Propulsion Test Article.
>-097 is, if memory serves, the SAIL lab avionics system at JSC.
MPTA was never classified as an OV, and it later became
the backbone of the Shuttle-C mockup. SAIL got an unofficial
tail number well after the fact.
>Also, technically, the Structural Spares that replaced the ones used to
>build OV-105 Endeavour, are classified as OV-106.
>I'd cite both Dan Jenkins book and the NSTS Reference, but I'm
>too tired tonight to look them up.
If I correctly recall previous discussions on this subject, the
replacement structural spares were never built.
Brian
Do you know what parts were built (crew compartment, wings, aft
fuselage.....) for the new spares?
On Thu, 27 Aug 1998, Brian S. Thorn wrote:
> If I correctly recall previous discussions on this subject, the
> replacement structural spares were never built.
That depends on how you look at it. I know work was started with an
authority to proceed on October 18, 1989 for work on the replacement
structural spares. On October 29, 1989, processing, and fabrication work
for the structral spare vertical stabilizer was begun. By November 19th of
the same year work on the aft fuselage for the spares was started, and by
the 22nd of that very month the planning, and processing work for the
replacement wings was started at Grumman, Bethpage, NY. By January of
1990, work had begun on the spare mid-fuselage at Gen. Dynamics in San
Diego, CA. Planning and fabrication work apparently also began immediately
thereafter on all other OV airframe components. So the replacement
structural spares were being built, but at what point in their
construction were they terminated, if at all?
-Mike
> Also, technically, the Structural Spares that replaced the ones used to
> build OV-105 Endeavour, are classified as OV-106.
Err ... they *built* another set of spares ? I thought that got cancelled !
- Jonathan
--
li...@bellsouth.spamsucks.net | Go Braves !!! | "I Hate it when I can't trust
http://personal.atl. | Play Pinball !! | my own technology!" - LaForge
bellsouth.net/~jdeitch |------------------------------------------------
----------------------------/ "Thrills! Chills! Magic! Prizes!" - Hurricane
Roddenberry, Asimov, Henson, Dr. Seuss, Mel Blanc, Friz Freleng ... Sigh ...
They did. I exchanged some email with Dennis Jenkins on this. An
unfortunate change of events I believe.
>
> - Jonathan
>
> --
> li...@bellsouth.spamsucks.net | Go Braves !!! | "I Hate it when I can't trust
> http://personal.atl. | Play Pinball !! | my own technology!" - LaForge
> bellsouth.net/~jdeitch |------------------------------------------------
> ----------------------------/ "Thrills! Chills! Magic! Prizes!" - Hurricane
>
> Roddenberry, Asimov, Henson, Dr. Seuss, Mel Blanc, Friz Freleng ... Sigh ...
--
Greg D. Moore President moo...@greenms.com
Green Mountain Software http://www.greenms.com/
518-283-4083 MCSE
Basically correct. They were started, but not finished; the contract was
cancelled before construction got very far.