View Single Post
Old 09-18-2007, 08:29 PM
CPMcGraw's Avatar
CPMcGraw CPMcGraw is offline
Join Date: Mar 2005
Location: Mobile, Alabama
Posts: 5,357
Exclamation New Plan -- Sky Lance


Another reuse of an old name...

This is a 13mm cluster ship, probably Skill Level 3 for difficulty. It requires some very careful surgery on a BC-1032 (used as the tailcone) to fit the ST-5 tubes through without breaking the remaining balsa. Also, you will need to cut and trim the ST-5 tube where it overlaps the ST-10. The gaps must be sealed completely, as the deployment pressurization would escape otherwise. The ST-10 does not need to be slotted. Study the 2D and 3D images carefully to see what I'm trying to describe (poorly) in words.

Note the override in the mass of the tailcone, reduced about 30%. The final piece will likely be even less mass than this, considering what has to be removed to fit the tubes. This is critical to the simulation, as it has much higher Dv numbers if left "stock".

Length: 18.70"
Diameter: 1.04" (ST-10)
Fin Span: 5.44"
Weight: 2.13 oz

(2) 1/2 A3-2T......120'......Dv 18 FPS.......23" guide length required
(2) A3-4T..........383'......Dv 3-7 FPS......33" guide length required

Don't try this with the 1/4 A3 as it never gets above 35'. The A10-3T is also not recommended as the Dv is above 30 FPS.

Attached Thumbnails
Click image for larger version

Name:  Sky Lance 2D.jpg
Views: 434
Size:  67.8 KB  Click image for larger version

Name:  Sky Lance 3D.jpg
Views: 494
Size:  40.0 KB  Click image for larger version

Name:  Sky Lance 3D v2.jpg
Views: 480
Size:  45.0 KB  
Attached Files
File Type: rkt Sky Lance.rkt (210.5 KB, 399 views)
Craig McGraw

BARCLONE Rocketry --
BARCLONE Blogsite --

BARs helping BARs

SAM 0044
AMA 352635
Reply With Quote