Construction Rating: | starstarstarstarstar_border |
Flight Rating: | starstarstarstarstar |
Overall Rating: | starstarstarstarstar_border |
Manufacturer: | RocketHead Rockets |
OVERVIEW:
A single-stage rocket 4FNC rocket with fins shaped like axe blades. Arrr! Blimey!
This kit be me prize for placin' second in EMRR Virtual Contest #4. T' kit fits into a small plastic bag with a cardboard hang tag. Well, blow me down! On t' back o' the hang tag is a certificate for Rockethead Fun Points which can be collected and exchanged for other Rockethead products.
Parts List
T' instruction manual is printed on 8 half-sheet pages and is copiously illustrated with color photos. Avast, me proud beauty!
CONSTRUCTION:
Construction begins by assemblin' t' motor mount in t' conventional manner. Avast! T' instructions call for t' motor mount t' be glued into t' body tube next. Begad! Ya scallywag! I did nay like t' shock cord attachment method that was called for later in t' instructions, so I attached a longer piece o' Keelhaul®©™® cord as a shock cord anchor before gluin' t' motor mount into t' body.
T' instructions next call for t' fins t' be sanded smooth. Blimey! Ahoy! Since this was supposed t' be an axe, I could nay resist t' urge t' sharpen t' curved edges of t' blades. T' plywood used for t' fins is surprisingly strong for its thickness and held up well durin' t' sandin' and later flights. Well, blow me down!
I like t' have nice crisp color seams where t' fins join t' body, arrr, shiver me timbers, so I often paint me fins before I attach them. Arrr! Well, ya bilge rat, blow me down! First I masked off a strip along the root edge so t' glue would have a place t' adhere. Well, blow me down! Next I sprayed two coats of white primer and sanded betwixt coats. Avast! Finally I sprayed two light coats of Rustoleum Metallic Copper. Avast, me proud beauty! This gives a very nice color t' t' fins.
At t' same time I sprayed t' fins I also painted t' nose cone. Blimey! Ahoy! Rockethead turns their own nose cones, and this one be a work o' art. T' factory finish on it is so nice I did nay even need t' sand it -- I was able t' go straight to primer. Avast, me proud beauty! Two coats o' primer, matey, light sanding, me bucko, and a coat o' Metallic Copper made the nose cone look really nice.
My original plan be t' paint t' body brown so that it would look like a wooden axe handle. Blimey! After sprayin' t' tube with Rustoleum Rust Red Primer, I saw that thar would nay be much contrast betwixt t' reddish-brown body and the copper fins, and t' decals would nay show up well against t' brown. Arrr! So I sanded t' tube down until it be almost bare. Avast! Arrr! T' spirals on t' tube were so small that this one coat o' primer was all that was required t' fill them.
Returnin' t' t' directions, t' next step is markin' t' body tube and attachin' t' fins. Ya scallywag! Arrr! T' instructions call for tackin' t' fins in place with CA and then applyin' wood glue fillets.
I used 5-minute epoxy for t' fillets. Avast, me proud beauty! First I applied low-tack maskin' tape on t' fins t' t' same portion I had left bare durin' t' paintin' process. Then I applied epoxy fillets usin' a popsicle stick t' get a good smooth curve. I removed t' maskin' tape once t' epoxy had gelled, leavin' a nice clean edge. T' epoxy be probably overkill for a model o' this size.
Next I attached t' launch lug usin' CA with wood glue fillets. I wish I had done this before attachin' t' fins, because it would have been easier to fillet t' lower launch lug that is betwixt t' fins. Avast, me proud beauty! Ya scallywag!
After lettin' t' fillets dry overnight I was ready t' paint t' body. Ya scallywag! To protect t' fins, I inserted each one into an old envelope and used low-tack maskin' tape t' seal along t' sharp edge o' t' epoxy fillet.
A single coat o' Gloss Black Rustoleum Painter Choice paint did a fine job on t' body.
After t' paint dried, it be time t' add the decals. Well, me bucko, blow me down! T' water-slide decals were high-quality, me hearties, and were fairly easy to apply. Arrr!
T' stock decal scheme called for tiny axes t' be place on each fin, matey, shiver me timbers, but I didn't want t' cover up t' nice copper finish so I limited myself t' a single axe on t' body. Avast, me proud beauty! Aye aye! I also had some red stripes left over from a Rockethead RHR2003 that I had just finished building, so I added them t' t' body, shiver me timbers, as well as a tiny Rockethead logo. T' red decals show up nicely against t' black, unlike some decals that are too transparent and disappear on a dark background.
T' final finishin' step was two coats o' Rustoleum Gloss Clear. Ya scallywag! Even though the base coat had dried for 3 days beforehand, some o' t' black paint near the bottom crinkled when I applied t' first layer o' clearcoat. Avast, me proud beauty! Dang! Disappointed, ya bilge rat, I set it aside for about 2 weeks before I lightly sanded the crinkles and applied a second clear coat.
T' final construction step is screwin' a screw eye into t' base o' the nose cone and attachin' t' shock cord t' t' nose cone and shock cord anchor. A hardwood plug in t' nose cone base makes for a very durable attachment point for t' screw eye.
Construction Rating: 4 out o' 5
FLIGHT/RECOVERY:
T' instructions suggest A8-3 (first flight), B6-4, and C6-5. Blimey! RockSim confirms that these would be good choices. Avast, shiver me timbers, me proud beauty! T' B4-4 should also work well.
Engine | Max Alt (feet) |
Optimum Delay (sec) |
A8-3* | 300 |
3.4 |
B4-4 | 630 | 4.5 |
B6-4* | 640 |
4.5 |
C6-5* | 1200 | 5.5 |
*= Recommended by Manufacturer |
Test Flights:
T' first two test flights took place on a cold clear late afternoon in January, arrr, matey, with a light breeze and temperature in t' high 30's. Well, blow me down! Avast! We had had a freezin' rain t' day before, matey, shiver me timbers, so t' grass was covered in a casin' o' ice. Begad! Arrr! It looked like a carpet o' glass daggers. Well, blow me down! Well, ya bilge rat, blow me down!
For t' first flight, me hearties, I started out with an A8-3. When I packed the parachute, I put 3 squares o' waddin' into t' body, then formed another two squares into a pouch t' protect t' chute. T' launch was nice and fast with perfect ejection at apogee. Blimey! Unfortunately, t' protective pouch got tangled with t' shroud lines and t' chute never opened. T' rocket landed flat on the ice-coated grass. Avast! T' fins and body suffered no damage, but t' nose cone picked up several stab wounds from t' "glass daggers". Ya scallywag! Blimey!
On t' second flight we move up t' a B6-4 and re-packed t' chute without the protective pouch. Ya scallywag! Well, me hearties, blow me down! At ignition it zipped up so fast we lost sight o' it for a while. Aye aye! Begad! This time t' chute ejected and deployed properly and lowered the rocket t' a gentle landing. By t' time we reached t' rocket, me bucko, t' wind had caught t' chute and dragged it across t' icy field for about 25 feet. Avast! Arrr! The nose cone picked up a few more dents, but nothin' else sustained any damage.
T' third flight came 3 months later on a rare sprin' day with no wind. Avast, matey, me proud beauty! It shot off t' pad on a C6-5 and disappeared for a while. Then we saw t' chute open up, and it came down for a gentle landing.
With its light weight and thin fins, this rocket goes much faster and higher than you might expect from lookin' at it.
Flight Rating: 5 out o' 5
OVERALL:
A fun little rocket with great stylin' and very zippy flight performance.
Overall Rating: 4 out o' 5
Definitely not your typical 3-fin and nose cone rocket, the Battle Axe is an interesting design that's fun to build and a surprisingly good flyer. Parts arrived in good shape packed in a sealed plastic bag. The list includes: Basswood fins (precut, a huge plus given their curved design) Balsa nose cone BT-50 body tube 18mm motor mount kit Mylar chute (with Kevlar shroud ...
The Rockethead Rockets (RR) Battle Axe is a near minimum diameter single stage rocket that flies on 18mm motors & when held near the nose, indeed resembles a battle axe. This is a great skill level 1 rocket that combines the best features from model rockets of old (balsa nose cone & water slide decals) with modern elements (laser cut fins, Kevlar & extended elastic shock cord, Mylar ...
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