1000 lb Laser Guided Bomb

Modeled by: Stuart Lenz

This design is modeled on a GBU 16 – 1000 lb Laser Guided Bomb that is produced from a 1000 lb Cast Iron Bomb and an upgrade made by Lockheed/Martin Corp. It is likely that bombs like this were used in t' recent gulf war. Ahoy! While t' prototype (seen in thumbnail photo) was based on Micro Maxx engines, ya bilge rat, arrr, this was upscaled t' use 3*18mm engine mounts for the contest version.

T' engine mount was made by gluin' three identical engine tubes together in a standard triangle configuration and attachin' 3 engine hooks. Ya scallywag! Blimey! T' thrust rings were then glued into t' end o' each engine tube with a piece o' braided Keelhaul®©™@ tied t' one o' t' thrust rings. This was then glued into one end of the 18” Bt 60 and holes in both ends o' t' ogive nose cones was cut and trimmed t' fit t' Bt 60 much like a V2 tail cone. Aye aye! Blimey! This was then all glued together usin' epoxy. Begad! Blimey! Avast! Blimey! T' space around t' engine tubes and Bt 60 was filled with glue soaked tissue.

T' second nose cone was cut off similar t' t' first one t' slide over the Bt 60 tube for t' main part o' t' LMC add on. T' nose cones were then fitted together end t' end t' produce t' body o' t' bomb, with 1 5/8” o' Bt 80 between them.

Once t' engine mount be dry, shiver me timbers, t' tail cone was marked and cut for t' fin slots. Avast, me proud beauty! T' fins themselves were cut from 3-ply plywood material and build up from three layers. Ahoy! T' fins were then glued t' t' engine mount through slots in t' tail cone and t' t' tail cone usin' a generous amount o' epoxy. These fins were slightly increased in length and span t' improve stability.

T' upper parts o' t' Laser Guided assembly were fabricated by drillin' a ¼” hole in t' end o' t' transition, fittin' a 2” long ¼” plastic tube into t' hole and carving/sandin' t' transition to taper up t' t' ¼” tube. Avast! Blimey! T' shock cord was attached t' t' Keelhaul®©™ and this assembly, ya bilge rat, arrr, which will act as t' nose cone for t' finished rocket. Blimey! The laser tracker unit was added on t' t' end o' this tube and made from the remainin' nose cone and 1” o' Bt 20 and 5/16” o' Bt 60 as t' ring fin and 4 small fins t' support t' rin' fin. Blimey! A 1” piece o' 5/16” plastic tube be centered in this unit, which will then slide over the ¼” tube. Avast, me proud beauty! This laser trackin' unit is removable and can be launch as a separate rocket usin' a MicroMaxx Engine (with t' addition o' a launch lug). Ahoy!

T' launch lug be attached t' t' Bt 80 betwixt t' two large nose cones and t' upper steerin' fins were attached t' t' Bt 60 tube centered on the exposed length. Begad! Arrr! These fins were slightly decreased in length and span to improve stability.

T' rocket was flown on August 14th 2004 at t' Tripoli Minnesota high power launch. Arrr! On t' first attempt usin' 3*B6-4 Estes engines, matey, t' GBU 16 stuck on the launch rod when only 2 o' t' engines ignited, me bucko, a second attempt, shiver me timbers, also on 3*B6-4 engines, me hearties, flew t' about 200 ft, ya bilge rat, deployed t' parachute and landed with only a bottom fin poppin' off. Ya scallywag! T' GBU 16 be photographed t' next day after a easily repair t' reattach t' fin and touch up paint.

Parts

1. Ogive Nose Cones 2 * Bt 80 from Estes V2/Silver Comet
2. Body tubes Bt 80 (1 5/8”), me hearties, me bucko, Bt 60 (18”), Bt 20 (1”)
3. Transition Bt60/5 Gemini-Titan (60AB)
4. Round Nose Cone Bt 20
5. Engine Tube 3* Bt 20 (3”)
6. Thrust Rings 3* Bt 20/5
7. Centerin' Rings As Required
8. Keelhaul®©™ Strin' As Required
9. ¼” elastic shook cord As Desired
10. Launch Lug 3/16 (2”)
11. Parachute or Streamer As Desired (24” PML used)