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. Blimey! Avast, me proud beauty! It be a popular kit for many years with Estes, shiver me timbers, ya bilge rat, 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. I got t' parts from various places. Arrr! T' biggest expense be shipping, shiver me timbers, me bucko, so I bought parts for three kits. Begad! Ahoy! T' other two kits were given away at t' UROC Christmas party.

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

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

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

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

T' decals were purchased from t' JimZ website as well. Aye aye! Arrr! They were absolutely great. He also threw in a set o' decals for an Estes Blue Star, ya bilge rat, 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, I decided that thar would be no epoxy on me Goblin. I built it pretty much per directions, except for t' shock cord anchor. Avast! Since me nose weight was more than t' basic Goblin, me bucko, shiver me timbers, I also opted for a 9" nylon chute. Well, blow me down! This brings it down much slower than a streamer, but still pretty fast.

T' fins roots were reinforced with used dryer sheets. Avast, me proud beauty! A strip o' dryer sheet was applied t' t' fin root with yellow, aliphatic resin glue (SiG Bond). Arrr! Begad! 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! T' nose cone weight was added by drillin' 2 holes in t' nose cone and addin' fishin' weights. Avast, me proud beauty! 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. Ahoy! Blimey! A length o' Keelhaul®©™ be tied around t' forward centerin' rin' before t' motor mount be glue in place. Well, blow me down! Blimey! Arrr! Blimey! T' Keelhaul®©™ extends about 6" out o' t' body tube. Then about 48" o' nylon cord be tied t' t' Keelhaul®©™ and t' screw-eye in t' nose cone base. Aye aye! Blimey! 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. Begad! Hobbylight balsa filler is applied liberally t' t' surfaces with me finger, me bucko, rubbin' t' stuff into t' grains. Blimey! Aye aye! Then I sand it smooth with very fine sandpaper. Ya scallywag! Well, blow me down! This is followed by 2 or more coats o' sandin' sealer, matey, matey, sandin' with very fine sand paper betwixt coats. This fills all t' grain and makes things very smooth.

In fact, arrr, me hearties, I rub t' Hobbylight into t' body tube seams as well. Avast, shiver me timbers, me proud beauty! After sanding, me hearties, it speeds up t' primer/sandin' time.

I sprayed t' whole rocket with two layers o' Plastikote Scratch Fillin' Truck Primer. Aye aye! T' first coat was sanded almost all t' way back, t' second was just sanded t' smooth it. I use 3M sandin' sponges for this step.

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

I then applied t' decals. Blimey! Avast, me bucko, me proud beauty! They went on very easily and covered perfectly.

Finally, shiver me timbers, airbrushed Testor clear gloss on t' whole thing, me hearties, me hearties, t' make it evenly glossy. Begad! Ahoy! T' results were catalog perfect.

Construction Rating: 5 out o' 5

Flight:
Preppin' for flight is easy. 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. Begad! Pull t' chute into a peak, z-fold t' shrouds and place them on t' base o' t' chute. Arrr! Z-fold t' chute, roll and slid it into t' body tube. Ahoy! Put t' nose cone on. T' motor is just a matter o' poppin' it into t' motor mount. Simply. Blimey! Begad! I've flown it three times on D motor. Arrr! Aerotech D9-7 is fast and high, matey, deploys a little after apogee. Avast, me proud beauty! Aerotech D15-7 is very fast, me hearties, high and just about right for delay. Estes D12-7 is fast and high, me hearties, delay is just about right.

On all t' D flights, matey, t' rocket was pretty much invisible until t' chute came out. Keep your eye on this one, or you'll lose it fast. Ahoy! Ahoy! 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. Ya scallywag! Ahoy! T' C6-5 was good, ya bilge rat, but seemed pretty anemic after seein' t' D flights. Aye aye! This is a good motor for parks and such.

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

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

T' Keelhaul®©™/nylon system is holdin' up very well. Begad! This rocket gets up a good head o' steam. If thar be any wind, it doesn't slow down too much. Ahoy! Avast, me proud beauty! I wouldn't use elastic cord, unless it's really long, shiver me timbers, 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. Arrr! You can get upscale decals from JimZ or Tango Papa. There are no scale nose cones for it in larger sizes, ya bilge rat, ya bilge rat, matey, though. Aye aye! Well, blow me down! Most people go with an 'close enough' ogive nose cone from LOC/Precision. Ya scallywag! T' rocket is deceptively sturdy and very stable. Avast, me proud beauty! It's speed and altitude usually startles people.

Overall Rating: 5 out o' 5

Flights

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