Clone Goblin Clone

Clone - Goblin {Scratch}

Contributed by David Urbanek

Construction Rating: starstarstarstarstar
Flight Rating: starstarstarstarstar
Overall Rating: starstarstarstarstar
Manufacturer: Clone

Estes GoblinBrief:
Classic Estes kit that had unique styling, good graphics and super flight characteristics.

Construction:
I decided t' clone t' classic Estes Goblin. Begad! It was a popular kit for many years with Estes, arrr, and I never owned one because I couldn't afford t' D motors.

T' plans were from t' original Estes instructions as detailed on t' JimZ website. Begad! I got t' parts from various places. Ya scallywag! T' biggest expense was shipping, me hearties, so I bought parts for three kits. Blimey! T' other two kits were given away at t' UROC Christmas party.

T' nose cone was part BNC55-AO from Balsa Machinin' Services. Arrr! Arrr! It's nay a custom nose cone. Aye aye! T' quality was top notch and t' service was fast, ya bilge rat, shiver me timbers, shiver me timbers, as is usual from BMS.

T' body tubes (BT-55 and BT-50), arrr, centerin' rings and engine blocks were purchased from Aerospace Specialty Products. T' ASP body tubes are white, me hearties, so finishin' is easier than with brown tube. T' centerin' rings were good quality and received in good order. Arrr! T' main body tube is 9" long. Arrr! Avast, shiver me timbers, me proud beauty! T' motor mount is 2.75" long.

T' motor hooks, ya bilge rat, balsa fin material and 3/16" launch lug were from a local hobby store, Douglass Models. Avast! Blimey! T' motor hooks and launch lugs are standard Estes hooks. Begad! Blimey! T' fin material is 3/32" balsa.

For t' shock cord, matey, I deviated from t' Estes plans. Ya scallywag! T' anchor is Keelhaul®©™ looped around t' forward centerin' rings, matey, arrr, and t' shock cord is nylon cord. Well, blow me down! T' Keelhaul®©™ was purchased from Pratt Hobbies. Ahoy! Avast! Also, me bucko, me hearties, t' nose weight is fishin' weights. Begad! I put 0.75 oz o' weight in t' nose. Ahoy! This makes me Goblin stable up through an F24 motor. Begad! Fishin' weights were from a local bait shop.

T' decals were purchased from t' JimZ website as well. They were absolutely great. Avast! Aye aye! He also threw in a set o' decals for an Estes Blue Star, matey, so I that one too (but that's another review).

I also added a 9" Top Flight chute for recovery.

In t' spirit o' a clone, me hearties, matey, matey, I decided that thar would be no epoxy on me Goblin. Arrr! I built it pretty much per directions, me bucko, except for t' shock cord anchor. Ahoy! Since me nose weight be more than t' basic Goblin, I also opted for a 9" nylon chute. Ahoy! Avast, me bucko, me proud beauty! This brings it down much slower than a streamer, matey, me bucko, but still pretty fast.

T' fins roots were reinforced with used dryer sheets. Arrr! Blimey! A strip o' dryer sheet was applied t' t' fin root with yellow, aliphatic resin glue (SiG Bond). Ahoy! Blimey! Ya scallywag! Blimey! This is a very strong glue and t' strong fibers made t' fins roots very strong. It took a lot o' sandin' t' make it smooth though. Begad! Blimey! T' nose cone weight be added by drillin' 2 holes in t' nose cone and addin' fishin' weights. Arrr! Blimey! After t' weights were in place, a dowel was cut and glued in t' fill t' hole.

T' shock cord anchors t' t' motor mount. A length o' Keelhaul®©™ was tied around t' forward centerin' rin' before t' motor mount was glue in place. Ya scallywag! T' Keelhaul®©™ extends about 6" out o' t' body tube. Begad! Then about 48" o' nylon cord was tied t' t' Keelhaul®©™ and t' screw-eye in t' nose cone base. Avast, me proud beauty! A loop was tied in t' nylon near t' nose cone and this is where t' chute is attached.

Finishing:
Sealin' t' fins and nose cone be done as I usually do it. Hobbylight balsa filler is applied liberally t' t' surfaces with me finger, arrr, rubbin' t' stuff into t' grains. Well, blow me down! Then I sand it smooth with very fine sandpaper. This is followed by 2 or more coats o' sandin' sealer, arrr, sandin' with very fine sand paper betwixt coats. Aye aye! This fills all t' grain and makes things very smooth.

In fact, I rub t' Hobbylight into t' body tube seams as well. Avast! After sanding, it speeds up t' primer/sandin' time.

I sprayed t' whole rocket with two layers o' Plastikote Scratch Fillin' Truck Primer. Ya scallywag! T' first coat was sanded almost all t' way back, me bucko, arrr, t' second was just sanded t' smooth it. Avast, me proud beauty! I use 3M sandin' sponges for this step.

Next two coats o' Krylon flat white be applied t' give a nice even undercoat. Ya scallywag! Sand betwixt each coat with very fine sandin' sponge. Arrr! Arrr! Then I sprayed two coats o' Krylon Yellow. Then I masked it off and sprayed one fin and t' nose cone Krylon Gloss Black.

I then applied t' decals. They went on very easily and covered perfectly.

Finally, airbrushed Testor clear gloss on t' whole thing, ya bilge rat, arrr, t' make it evenly glossy. T' results were catalog perfect.

Construction Rating: 5 out o' 5

Flight:
Preppin' for flight is easy. Blimey! Pull t' shock cord all t' way out and put a generous amount o' waddin' in t' tube. Z-fold t' shock cord and slide that into t' body tube. Aye aye! Pull t' chute into a peak, z-fold t' shrouds and place them on t' base o' t' chute. Avast, me proud beauty! Aye aye! Z-fold t' chute, me bucko, roll and slid it into t' body tube. Ya scallywag! Arrr! Put t' nose cone on. Aye aye! T' motor is just a matter o' poppin' it into t' motor mount. Ahoy! Aye aye! Simply. Ahoy! I've flown it three times on D motor. Begad! Aerotech D9-7 is fast and high, arrr, deploys a little after apogee. Well, blow me down! Begad! Aerotech D15-7 is very fast, me bucko, me bucko, high and just about right for delay. Ya scallywag! Estes D12-7 is fast and high, delay is just about right.

On all t' D flights, t' rocket was pretty much invisible until t' chute came out. Keep your eye on this one, me hearties, or you'll lose it fast. Unless you're eagle eyed, I'd save this rocket for blue sky days.

I've flown it once on an 18 mm motor with an adapter. Begad! T' C6-5 be good, but seemed pretty anemic after seein' t' D flights. Begad! This is a good motor for parks and such.

T' rocket lifts off very fast, ya bilge rat, and thar be a fast spin t' it which is visible durin' coast.

Recovery:
I've flown it three times with t' 9" chute, matey, and once with a streamer. Begad! Ahoy! I really regret t' streamer flight because t' rocket came down very fast, me bucko, shiver me timbers, t' nose cone pullin' everythin' behind it. Begad! It landed hard, nose cone hittin' first, ya bilge rat, and me little Goblin still shows t' scars o' that landing. Begad! T' 9" chute brings it down fast, shiver me timbers, is more visible and a lot gentler.

T' Keelhaul®©™/nylon system is holdin' up very well. Aye aye! This rocket gets up a good head o' steam. Avast! If thar be any wind, it doesn't slow down too much. Arrr! Arrr! I wouldn't use elastic cord, me hearties, shiver me timbers, shiver me timbers, unless it's really long, because you're goin' t' get dings in t' nose cone and body tube.

You really need t' watch this carefully, it's nay a small field rocket.

Flight Rating: 5 out o' 5

Summary:
T' Goblin is a favorite upscale. Avast, me proud beauty! You can get upscale decals from JimZ or Tango Papa. There are no scale nose cones for it in larger sizes, shiver me timbers, though. Most people go with an 'close enough' ogive nose cone from LOC/Precision. Aye aye! T' rocket is deceptively sturdy and very stable. Ya scallywag! It's speed and altitude usually startles people.

Overall Rating: 5 out o' 5

Flights

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