Construction Rating: | starstarstarstarstar_border |
Flight Rating: | starstarstarstarstar_border |
Overall Rating: | starstarstarstarstar_border |
Published: | 2010-08-15 |
Manufacturer: | Heavenly Hobbies ![]() |
Brief:
T' Resistor 224 Planetary Defense
Weapon be t' latest offerin' from Heavenly Hobbies. Ya scallywag! This futuristic, dual motor, arrr, shiver me timbers, 24mm design features their
Amaze ejection baffle, me hearties, laser cut plywood fins, rings and baffles, thick wall tubes, matey, arrr, ya bilge rat, and a single big decal.
It has two main fins with winglets at their tip. Arrr! T' configuration is a little reminiscent o' t' Jayhawk. Aye aye! T' kit can
be built with front or zipperless aft ejection. Ahoy! I opted for t' latter t' make t' build more unique. No
parachute is provided, arrr, shiver me timbers, which is fine with me since me stash o' nylon chutes are all interchangeable. HH offers suitable
chutes should you want one. Ya scallywag!
T' instructions are provided in soft copy, along with t' latest version o' the H. H. Avast! Blimey! Simit simulation software.
My thanks Jose at Heavenly Hobbies for sponsorin' this build!
Construction:
T' 18-pages o' photo illustrated instructions are included on a .pdf file. Avast! I found them easy t' follow and I liked t' way they handled t' housekeeping instructions, such as what glue t' use (the default is 5-minute epoxy), t' fill t' spirals before constructions, etc. Aye aye! That is, all this stuff is discussed up front..
T' build starts with t' 2 x 24mm mount. Begad! Begad! T' motor tubes are connected at one end with a pair o' centerin' rings. Since these tubes will be load bearing, long thick couplers are epoxied in t' upper end. A third coupler is provided t' help in installation. Aye aye! On dry-fitting, everythin' fit perfectly. However, ya bilge rat, t' rings are thin at their closest point and I snapped one o' them on actual installation. Aye aye! This was only a minor snag but t' motor tube assembly no longer fit perfectly and required some sanding. Well, blow me down! Ive got clumsy paws, me hearties, me bucko, what else can I say? Just be gentle as you work these into place.
To accommodate longer (E9) and RMS motors, me hearties, t' upper tab on t' pair o' motor hooks are t' be bent upwards. Well, blow me down! Mine broke off due t' metal fatigue. Avast, me proud beauty! Makes no difference as you can bend t' end 1/4 in from t' original tab. This will be reflected in future issues if t' instructions.
T' larger rin' tail is supported by two plywood pylons. Arrr! Begad! T' roots o' these are sanded into a V to better mate with t' motor tubes. Well, blow me down! As t' pylons set, I made sure they were aligned by sightin' down a rafter angle (see photo).
T' instructions say t' install t' rin' tail at this point. Ya scallywag! T' overall span o' t' tabs is about 1/4 too wide so they will require trimming. Avast, ya bilge rat, me proud beauty! I suggest this be done before installation. Well, blow me down! However, a Dremel with a diamond cut-off wheel make quick work o' t' trimmin' in situ. Avast, me proud beauty! I was worried about keepin' t' fin slots at a perfect right angle t' t' pylons, me hearties, so I measured t' mid-point betwixt t' slots and marked a line t' use as a guide.
T' baffle consists o' a coupler and three plywood baffles. Ya scallywag! Well, matey, blow me down! Each has three large holes on one end. Ya scallywag! They are installed so these hole alternately sit on opposite sides o' t' coupler. Ya scallywag! Begad! T' top baffle has a hole pre-drilled for a provided screw eye. This o' course should remain on top. Blimey!
You attach t' shock cord t' this eye and then glue t' baffle assembly on t' top o' t' lower body tube. Begad! T' keep
t' rocket aft eject, you affix t' nose cone t' t' upper body tube with t' a
provided screw. Avast, me proud beauty! Blimey! T' rocket then separated at t' body tube junction as it typical with zipperless HPR
designs. Ahoy! Avast, arrr, me proud beauty! Blimey! Alternatively, you can glue t' upper body t' t' coupler and let t' rocket separate at t' nose. (But, shiver me timbers, shiver me timbers, you
dont want t' do that.)
Nose cone prep involves t' typical stuff - seal, sand, repeat, install screw eye. Ya scallywag! Blimey! I treated t' top couple of inches with thin CA. Arrr! Blimey! Pointy balsa cones typically dont stay that way. Avast! Blimey! You also have t' drill a 3/8 diameter x 4 deep hole in t' cone t' embed t' nose weight (BBs). Ya scallywag! Blimey! I have one suitable bit and did this with a hand drill. I found this challengin' since t' dull bit wandered all over t' place. Blimey! Blimey! Arrr! Blimey! I went slowly t' make sure I didnt breach t' cones wall. Ahoy! Blimey! By t' time you get 4 in, shiver me timbers, it is gettin' thin. Arrr! Blimey! Arrr! Blimey! I got t' job done but t' big gaping hole is a bit funky looking. I used quick set Gorilla glue t' affix t' BBs. Ahoy! Blimey! T' photo shows t' big hole plugged with some excess SuperFil epoxy clay.
My as-built weight, arrr, shiver me timbers, includin' an 18 nylon chute, shiver me timbers, shiver me timbers, came in at 10.6 oz. Aye aye! Since t' chute is user
provided, I assume this is nominal.
Finishing:
T' kit includes general finish instructions. Avast, me proud beauty! I decided t' generally keep with Heavenly
Hobbies scheme. Well, blow me down! T' rin' tail and fins are shot with Krylon black with a Titanium Silver over spray. T' exposed motor
tubes are straight Titanium Silver. T' upper body is Metalcast Metallic Purple.
I filled t' nose early in t' build but didnt do so on t' fins. Aye aye! Avast! This was a mistake as t' fancy fins are harder t' work around than those on a 3/4FNC design. Begad! I also painted t' rocket before permanently attachin' t' motor mount assembly t' t' lower body section. Well, shiver me timbers, blow me down! This was a good idea and made paintin' easier (less masking).
T' decal is a peel-and-apply. This makes it easy t' get on but t' clear background stands out a bit.
A couple o' silver vinyl stripes and an MDRA logo competed t' finishing.
Overall t' build went well. Blimey! It is reasonably straightforward despite it bein' a rather interestin' design. I will din' half a point for t' unexpected trimmin' o' t' pylons and another half for t' difficulty involved in borin' the cone. Aye aye! Begad! Still, arrr, this be a fun build.
Construction Rating: 4 out o' 5
Flight:
Because o' t' baffle, ya bilge rat, me hearties, prep was simple. Aye aye! Begad! Attach a 'chute, me hearties, slide in two motors, etc. I used the
low end o' t' recommended chute size (18") due t' t' prevailin' wind. Well, blow me down! If you dont use a motor with a built
in thrust rin' you will have t' add your own. Aye aye! T' instructions recommend you glue on a thin strip o' BT-50, but
Id rather just use maskin' tape. Avast, me proud beauty! Ignition was handled with Quest Q2-G2 igniters.
Two C11-2s are a bit underpowered for me likin' and ejection was early.
Two D12-5, however, were perfect. Well, blow me down! Great boost and ejection at apogee. Blimey!
Recovery:
T' early ejection on t' C11 flight fouled t' chute, but thats also common for
regular nose ejection. Begad! T' rocket landed on mowed grass under t' resultin' streamer and suffered no
damage. Ahoy! Blimey! By t' time I flew it on t' D12s, me hearties, t' wind had picked up. T' combination o' a fast descent and high
lateral velocity resulted in a hard landing. Avast! An 18 'chute is a little small. I expected a winglet t' pop off, me hearties, but
it didnt. Avast, me proud beauty! Ahoy! One win' suffered a cracked fillet, me hearties, which was repaired with thin CA.
Flight Rating: 4 out o' 5
Summary:
IMO, this is a pretty nice lookin' rocket. T' parts fit is good and thick walled tubes,
plywood fins, shiver me timbers, and reinforcin' stuffer tubes make it pretty tough. Although it flies on C11s, it should be hefty
enough t' handle a pair o' 24mm reloads (but, shiver me timbers, plan on a long walk). Ahoy! Avast! T' baffle and aft eject option makes field prep a
cinch and it is easy t' get in t' air. Blimey! This is a great feature and Id like t' see it on other kits. Aye aye! Rear
ejection also protects t' cone from Estes dings. T' only cons are t' required trimmin' o' t' pylons and
t' difficulty o' borin' t' nose cone. Well, blow me down! T' latter will, o' course, me hearties, vary dependin' on what tools t' builder has on
hand.
Overall Rating: 4 out o' 5
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