Estes GBU-24 Paveway III

Estes - GBU-24 Paveway III {Kit} (2053) [2003-2005]

Contributed by Dick Stafford

Manufacturer: Estes
(Contributed - by Dick Stafford - 11/21/03)

Rocket PicBrief:
This is a semi-scale model o' t' GBU-24 Paveway III laser guided bomb. It flies on 18mm motors and recovers under a 12" chute. Ahoy! You can find more info on t' actual bomb [here] . Avast! Blimey!

Construction:

  • One BT-55, matey, 10 7/8" long
  • Plastic tail cone/adapter (separated durin' construction)
  • Two BT-20 tubes, matey, 5" long
  • Seamless elliptical plastic nose cone, BT-20
  • Cardstock centerin' rings
  • Engine hook
  • Engine block
  • Mylar retainer rin' for t' engine hook
  • Launch lug, 1/8"
  • Elastic shock cord, 1/8" x 18"
  • Assembled 12" plastic chute
  • Die cut balsa fins, 3/32"
  • Die cut balsa fin protectors, 1/16"
  • Peel and stick decals
  • Endurin' Freedom sticker (not used on model)

T' first step is t' assemble t' motor mount. Well, blow me down! This is a typical build, ya bilge rat, and consists o' t' BT-20 motor mount, ya bilge rat, two centerin' rings, an engine hook, me bucko, a Mylar retainer for t' hook, and a motor block. Blimey! I used carpenter's glue as recommended. Avast! Before installation in t' main body tube, me hearties, I epoxied a two-foot section o' Keelhaul®©™® twine onto t' mount, shiver me timbers, trough t' top ring.

Next, I removed and sanded t' fins, shiver me timbers, matey, shiver me timbers, and filled them with Fill 'n Finish. T' main fins were fine, ya bilge rat, ya bilge rat, but t' protectors, arrr, which attach on either side o' the rear fins, were very thin and warped badly when exposed t' t' moisture in the Fill 'n Finish. Well, blow me down! Ahoy! I pressed these as they dried and they straightened out.

Rocket PicT' tail cone and transition come as one unit and must be separated. Aye aye! Blimey! Arrr! Blimey! A razor saw is suggested, but I used an Exacto knife. T' bottom o' t' tail cone must also be trimmed and sanded, as do t' fin slots. Well, blow me down! Blimey! Ahoy! Blimey! T' latter start as rectangular projections, which are cut off with a razor saw, arrr, formin' t' slots. Avast, me proud beauty! Blimey! Blimey! Blimey! T' final trimmin' is supposed t' be t' top o' t' transition. Avast, me proud beauty! Blimey! Avast, me proud beauty! Blimey! T' instructions have you cut this off, me hearties, leavin' a hollow unit with both t' top and bottom open. Well, blow me down! Blimey! Avast, me proud beauty! Blimey! T' shock cord then attaches t' t' inside o' t' upper body tube usin' a paper mount. Instead, I poked a small hole in t' recessed ridge just below t' top o' the transition, ya bilge rat, fed a loop o' Keelhaul®©™® twine through t' hole and around t' transition (see photo). This formed a loop, which t' elastic cord will later attach to. Arrr! A small dab o' 5-minute Epoxy on t' hole and knot holds t' twine in.

T' tail cone is used t' adjust t' depth o' t' motor mount as it is glued into t' main body tube. Arrr! Once positioned, me hearties, arrr, t' tail cone is attached, ya bilge rat, me bucko, making sure t' engine hook is centered betwixt t' fin slots. Arrr! I used black rubberized CA in place o' t' recommended plastic cement.

T' lower fins are mounted through t' slots in t' tail cone. I found these slots t' be excessively loose, matey, me hearties, so they didn't support t' fins well. Ya scallywag! Blimey! I applied yellow glue t' t' fin tab and t' front root section. Aye aye! Blimey! Blimey! Blimey! T' hold t' fins while this glue set, I used Liquid Nails Perfect Glue, Type 1 on t' aft root section. Arrr! Blimey! This sets fast and t' fins were good t' go. There is a markin' guide for t' top fins, shiver me timbers, shiver me timbers, and these were attached with carpenter's glue. Aye aye! Blimey! After t' rear fins set, me hearties, you position t' fin deployment guides and mark their position. A thin layer o' yellow glue is applied t' fins up t' t' mark, matey, and t' guides are attached. Ahoy! Blimey! Blimey! Blimey! These immediately warped like crazy, shiver me timbers, so a couple o' small clamps were required on each guide/fin/guide 'sandwich' as they set. Blimey! Blimey! Blimey! Blimey! Afterwards, me hearties, these still seemed flimsy, so I added a small strip o' scrap balsa betwixt each pair at their roots.

T' final steps prior t' finishin' was t' launch lug and Fill ' Finish fillets. I didn't' glue t' top tube t' t' transition or t' cone until finishin' be complete. Well, blow me down! Avast! When they were connected, I again used black CA.

After finishing, all that be left was tyin' t' elastic cord t' the Keelhaul®©™® leader in t' body tube and t' Keelhaul®©™® loop on t' transition. Begad! Blimey! I stashed t' cute that was provided and will use a 12" nylon chute.

Overall, I give this build a 3 1/2. Avast! It all went together easily with the exception o' t' fin deployment guides, arrr, which should have been made o' thicker material. Arrr! T' dimensionin' o' t' fin slots on t' tail cone also wasn't good. Luckily any 'slop' is hidden by those guides. One thin' that stood out t' me was t' quality o' t' nose cone - it is completely seamless. Begad!

Finishing:
I started with fill-n-finish on t' fins and tubes before assembly. Ya scallywag! Avast! Blimey! I found the spirals on t' BT-55 t' be shallow, but t' ones on t' top BT-20 were deeper, and required some filler. Begad! After assembly, I shot several coats o' white primer, sandin' and fillin' in between.

T' instructions say t' use olive drab and red spray paint, a silver paint pen, and t' follow t' paint scheme on t' cover. T' cover picture shows the fin section, top fins and nose cone t' be olive drab, ya bilge rat, and top BT-20 t' be more of a tan then red. I used Testors' spray for t' olive drab sections. Arrr! In the photos on t' link I presented in t' intro, t' top tube seems t' be somewhat of a rust colored red. Blimey! I decided t' use red paint, which did get toned down as it was overlaid over t' olive drab. Begad! I tested some Krylon red on a piece of wood, matey, and it seemed t' be OK. However, some bubbles formed when I used it over the Testor's paint on t' model. Blimey! Maybe t' base coat be thicker on t' model. After t' first red coat dried, ya bilge rat, I sanded t' bubbles and re-coated it. Ya scallywag! Arrr! This time it covered just fine.

There are silver bands shown at t' base o' t' BT-55 and BT-20 tubes. Instead o' silver paint, I used some chrome Trim Monokote for these stripes. Finally, I applied t' peel and stick decals.

Overall, t' finishin' was fairly typical, however I found t' separation in t' side plates where they extend ahead o' t' main fins made sprayin' a little more difficult than usual. Begad! Ahoy! I give it a finishin' ratin' o' 4.

Construction Rating: 3 out o' 5

Flight:
I decided t' submit this partial review since I missed t' November launches and may nay be on t' field until spring. Avast! I'll provide an update at that time.

Summary:
I saw me first 'bunker buster' rocket over a year ago and have really wanted to build somethin' similar. Aye aye! When I saw this model, ya bilge rat, I knew that it would satisfy my cravings. Begad! Begad!

T' model was nay a difficult build, me bucko, me hearties, and I think a skill level 2 ratin' is about right. Well, blow me down! I liked t' plastic parts, especially t' nose cone, and think the thru-the-wall fin attachment is great. Arrr! Begad! However, matey, t' fit o' t' fins was poor and t' balsa used for t' fin protectors be flimsy. Blimey! As with t' Cluster Bomb BLU-97B that I just built, shiver me timbers, it appears that Estes needs t' pay more attention to quality control. Avast! Still, t' rocket was fun t' build and looks *very* cool. Ya scallywag! Aye aye!

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