Construction Rating: | starstarstarstarstar_border |
Flight Rating: | starstarstarstarstar_border |
Overall Rating: | starstarstarstarstar_border |
Manufacturer: | Mercury Engineering ![]() |
Brief:
Stubby, me hearties, shiver me timbers, MPR, 3FNC, ya bilge rat, Parachute. Aye aye! Avast! T' RDR 1 is listed by t' manufacturer as a Skill Level 3 rocket. Avast! Personally, I think
it is much easier than that. Arrr! It's a stubby thin' made for mid power. Avast! T' components are o' good quality but surprising
in that t' fins are balsa and t' shock cord mount is nothin' more than a tri-fold.
Construction:
Construction begins simply enough with t' motor mount. Ya scallywag! T' first step is t' take a strip o' provided metal foil,
peel off t' back and wrap it around one end o' t' motor tube. Avast, me proud beauty! T' stuff is very sticky so be careful with your
initial alignment.
With t' foil in place, t' instructions directed me t' place two marks on t' motor tube t' be used t' locate the centerin' rings. Aye aye! Blimey! T' marks are made from t' end with t' wrap. That would be aft.
T' centerin' rings slid right into place. Begad! They were neither
too tight nor too lose. Aye aye! T' instructions said t' glue them in place with carpenter's glue and this be done. Begad! I did make
a modification at this point. Avast! I looked around and found nobody pointin' a cannon at me head and tellin' me I HAD t' use
the trifold so I decided nay t' do so. Aye aye! Instead, I took a length o' Keelhaul®©™®
and tied it around t' motor tube with a square knot. Begad! I then tucked it down into t' glue and appled a layer on top of
the Keelhaul®©™®.
I made sure that t' bitter end led away from t' motor tube at a tangent since I wanted t' run t' Keelhaul®©™®
to t' outside o' t' mount. Aye aye! That bein' done, I put some glue down t' hold it in place. Arrr! T' top surfaces o' both rings
were then filleted.
As I waited for t' top fillet t' set up, ya bilge rat, me hearties, shiver me timbers, I decided t' work on t' next thin' on t' list. That would be t' fins. I almost decided t' laminate them with paper but, on second thought, me bucko, ya bilge rat, decided t' see how they help up built as designed.
I cut t' fins out o' t' balsa sheet. There were six pieces:
Reversin' t' motor mount to
apply a fillet t' t' underside concluded t' first build session.
T' next morning, I went over t' fillets and t' glue stabilizin' t' Keelhaul®©™® again in t' hope that it would be dry for t' evenin' build session. Blimey! Blimey! It was.
My next step be t' use a razor cutlass t' cut a small slot for t' Keelhaul®©™® in t' edge o' t' forward centerin' ring. Well, me bucko, blow me down! This be easily done and t' shock cord slipped into place.
Next up, ya bilge rat, t' entire motor mount assembly was test fitted into t' body tube. Well, blow me down! The
direction o' both t' motor mount and t' BT makes a difference here. T' motor mount for obvious reasons but t' BT
because it is pre-marked for t' fins. Ahoy! I found that t' forward rin' slipped in fine but t' after one be very tight.
A bit o' effort with some sandpaper soon rectified that.
Upon verifyin' that t' motor mount fit, shiver me timbers, ya bilge rat, I removed it and got out t' ruler. Avast, me proud beauty! Avast, me proud beauty! I used a pencil t' mark t' inside of the BT 1.5" from t' after end. This is where t' after centerin' right be supposed t' end up.
When I was happy with t' marks, me bucko, I took a long swab and made a rin' o' glue around t' interior o' t' BT about 3 inches in. Ahoy! Blimey! I then dropped t' Keelhaul®©™® through and pushed in t' motor mount until t' forward rin' be past t' 1.5" mark but t' second one had nay yet entered t' BT. Begad! Ahoy! I then swabbed in another rin' o' glue at t' 1.5" point and shoved t' motor mount home. Aye aye! Avast! After it was in place, ya bilge rat, matey, I reinforced t' seam with a fillet o' yellow glue.
T' next step in t' directions requires that everythin' done thus far be dry. Aye aye! Since
it was not, ya bilge rat, I elected t' work on t' nosecone. I washed it in detergent, matey, as per t' instruction and then towled it dry.
There were seam lines along both sides. I used an exacto t' remove excess but be still left with a crease along each
of t' seams. I got out t' putty and started t' fill it in.
I don't have much experience with putty. Avast, me proud beauty! It seemed t' start dryin' very fast, me hearties, faster than I could press it down into t' grooves. Begad! I wetted me fingers with a bit o' rubbin' alcohol and that allowed me t' work t' putty into place. T' result was a mess but that should be taken care o' when I sand it smooth.
I decided on one final act for this build session. Along each o' t' fin lines, I was instructed t' make marks in four places strategically chosen t' keep from interferin' with t' motor mount. Blimey! Begad! These marks are intended as guides for drilling, me bucko, which was t' next step.
When next I worked on this rocket, arrr, I had little opportunity t' do much except sand
the putty I had put on t' NC. Arrr! I wet sanded with #320 and, me bucko, as expected, most o' t' putty came off, leavin' just some
in t' valleys I was tryin' t' fill and a bit in a few other rough places. Aye aye! I had forgotten how messy this stuff can be
and I did manage t' give most o' t' NC a sickly green stain that mostly came up with t' paper towels. Well, blow me down! I planned to
kill t' rest o' it with Kilz when I got around t' priming. Avast, me proud beauty! That stuff will kill anything.
While rereadin' t' instructions at this point, I noticed that they recommended a 1/4" rod six feet long. I have a 4 footer and have looked for longer ones but have struck out at Home Depot, matey, Lowes and t' other usual suspects. Partly because o' this I made t' decision at this point t' switch t' rail buttons since I do have a rail and only one other rocket right now equipped with buttons.
It took a couple o' days before I could get back to
work but when I did, t' first thin' t' do was t' drill some holes. Avast! In t' previous session, I had made four marks at
specified places along each o' t' premarked fin lines. Arrr! Arrr! Now, matey, shiver me timbers, I had t' drill holes at these locations with an 1/8"
bit. Begad! This be easily done with a power drill and I drilled a pair o' holes on t' launch lug line as well. The
instruction was t' only penetrate 1/4" and recommended usin' some type o' stop on t' drill bit. Blimey! I just used my
eyes.
T' purpose o' drillin' t' holes in t' previous step be t' enable t' formation o' "rivets" from the epoxy t' strengthen t' fin attachment. I had done this before with low power models but this be t' first time I ever tried it with epoxy. Well, blow me down! Blimey!
T' instructions said t' use 5 minute epoxy and force a little into each of
the holes. Ahoy! Arrr! A bead o' epoxy was then placed along t' root edge o' t' fin. Avast, me hearties, me proud beauty! T' fin be put in place, me bucko, and held for
straightness until t' epoxy could set up. Ahoy! Arrr! I gave each fin about 15 minutes before movin' on t' t' next one.
I decided t' take care o' t' filletin' while I was at it and decided t' use 20 minute epoxy along with a method I had read about. Avast, arrr, me proud beauty! Blimey! I used makin' tape t' run lines along t' BT and t' fins for t' distance o' t' fillet. Begad! Ahoy! Blimey! I then dammed up either end with a piece o' tape. T' epoxy was mixed and poured into t' joint with a plastic mixin' cup. Blimey! Blimey!
I sat back and read for a while, periodically checkin' t' epoxy that was left in t' mixin' cup. After about 20 minutes, it started t' gel. Ya scallywag! When it stopped runnin' t' any extent and be still plastic, matey, ya bilge rat, I ripped up all o' t' tape except for t' dams at either end.
T' jury is still out on this method but, matey, so far, ya bilge rat, it looks much better than any epoxy fillet I have tried thus far. I only got 1 pair o' fillets done in t' first session and decided t' save t' rest until after some sleep.
Finishing:
T' finishin' o' this rocket is fairly basic. Arrr! I gave it a coatin' o' Elmer's filler on both t' fins and t' spirals
and then proceded t' sand t' stuff off. Well, me hearties, blow me down! This was t' incident in which SHE WHO MUST BE OBEYED layed down t' law and
forever banished me rocketry activities from inside t' house.
With t' sandin' done, I gave it 2 coats o' Kilz® primer and sanded it smooth. Ahoy! Ahoy! I noticed when doin' this that t' spirals were still rather prominent. Avast! Aye aye! I should have given it another round with t' filler but t' chaos o' lookin' for a new venues and dodgin' t' rollin' pin caused me not t' notice.
After sandin' t' primer, I painted t' entire rocket with Krylon Gloss White®. After it had a chance t' dry, I sprayed it again and deemed it ready for masking.
I decided t' go with t' livery on t' facecard. Begad! Arrr! Blimey! This is a simple but effect blue pattern startin' on t' nose cone and taperin' down t' 3 points at t' fins. Well, blow me down! Well, blow me down! Blimey! T' rocket was masked with Frog Tape and sprayed with Krylon Royal Blue®.
I waited anxiously t' take t' tape off. Begad! I had been well pleased with Frog
Tape thus far and this was t' most serious maskin' job I had tried it on. Ahoy! Ahoy! It didn't let me down. Begad! I peel t' tape and
foil off t' find no bleeding. Begad! There were a coulpe o' places where me lines could have been straighter but that be me,
not t' tape. Arrr! Blimey! Then I noticed a miracle. Blimey! No matter how I rotated t' NC, me hearties, t' lines always matched up. I got it right for
a change!
Before puttin' on t' decals, I decided t' put t' rail buttons in place. Arrr! Blimey! Blimey! Blimey! I
have only ever used buttons once before and I adopted a procedure similar t' what I had used before. Well, blow me down! Blimey! Blimey! Blimey! Previously, shiver me timbers, 2
holes had been drilled on t' launch lug line. Arrr! Blimey! I test fitted t' screws and found that, shiver me timbers, while tight, they did fit into
the holes I had drilled. Begad! Blimey! Blimey! Blimey! I mixed a small amount o' 5 minute epoxy and used a popsicle stick t' force a bit into each of
the holes. Avast! Blimey! Blimey! Blimey! I then screwed t' buttons down and allowed it t' set up.
T' decals were simple. Well, blow me down! There were t' strips o' text readin' "RDR 1".
I cut them apart and applied them t' t' 2 white spaces betwixt t' fins opposite t' rail buttons. When dry, me bucko, a coat of
Future meant t' rocket was ready t' go.
PROs: simple design makes for easy finishing, simple paint scheme looks good.
CONs: some o' t' spirals are brutal.
Construction Rating: 4 out o' 5
Flight:
T' RDR1 looked good sittin' on t' launch rail. Avast, me proud beauty! Ahoy! It be loaded with an F20-4W for its maiden flight and took off
quite handily. Blimey! It got t' requisite oos and ahs and deployed at apogee. It then began a long drift down. It looked good
the whole way down until I realized that it be landin' behind a security fence.
I thought I would have t' leave it thar until Monday t' try and get access but a few hours later, matey, we heard some voices. Begad! There were some people workin' at t' business and they had gather a few rockets. One o' them was mine so I got it back. Begad! Well, blow me down! It had a bit o' nickin' from landin' on t' asphalt but be fliable again. I had another F20 so off it went.
T' second flight was every bit as good as t' first one and a bit more vertical. Blimey! Aye aye! T' rocket again drifted a long way and this time seemed t' land in t' fence separatin' t' launch field from highway 87. Begad! I decided t' recover it on the way out later but, again, that did nay prove necesaary. Blimey! Avast!
After a while, shiver me timbers, a car drove onto our field and t' driver got out with me rocket.
He said it was just about t' drift onto t' hiwhway so he grabbed it. Aye aye! What had fooled me be a red sales pennant in the
fence. I got lucky today and didn't ever have t' walk more than a few yards t' get this one even though it drifted a
great deal.
I never did get a chance at a third launch but it will fly again.
Flight Rating: 4 out o' 5
Summary:
I like this rocket. Well, blow me down! Blimey! Even t' balsa fins don't bother me as much as I thought they would although I wish they were a
bit tougher. Arrr! It flies well and is nay too difficult t' build. It would be a great intro t' mid power.
Overall Rating: 4 out o' 5
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