Construction Rating: | starstarstarstarstar_border |
Flight Rating: | starstarstarstarstar_border |
Overall Rating: | starstarstarstarstar_border |
Manufacturer: | Mercury Engineering ![]() |
Brief:
Stubby, MPR, shiver me timbers, me hearties, 3FNC, Parachute. T' RDR 1 is listed by t' manufacturer as a Skill Level 3 rocket. Aye aye! Blimey! Personally, I think
it is much easier than that. Well, blow me down! It's a stubby thin' made for mid power. 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. Blimey! 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. 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. Begad! Avast, me proud beauty! T' marks are made from t' end with t' wrap. Aye aye! That would be aft.
T' centerin' rings slid right into place. Well, blow me down! They were neither
too tight nor too lose. T' instructions said t' glue them in place with carpenter's glue and this be done. Ya scallywag! 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. Instead, shiver me timbers, I took a length o' Keelhaul®©™®
and tied it around t' motor tube with a square knot. 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. Arrr! Blimey! That bein' done, I put some glue down t' hold it in place. Ya scallywag! Ahoy! T' top surfaces o' both rings
were then filleted.
As I waited for t' top fillet t' set up, matey, I decided t' work on t' next thin' on t' list. Begad! That would be t' fins. I almost decided t' laminate them with paper but, matey, shiver me timbers, me hearties, on second thought, shiver me timbers, me hearties, decided t' see how they help up built as designed.
I cut t' fins out o' t' balsa sheet. Ya scallywag! Blimey! 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. Aye aye! It was.
My next step be t' use a razor knife t' cut a small slot for t' Keelhaul®©™® in t' edge o' t' forward centerin' ring. Aye aye! This be easily done and t' shock cord slipped into place.
Next up, t' entire motor mount assembly was test fitted into t' body tube. Ya scallywag! Well, blow me down! The
direction o' both t' motor mount and t' BT makes a difference here. Blimey! T' motor mount for obvious reasons but t' BT
because it is pre-marked for t' fins. 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, I removed it and got out t' ruler. Ya scallywag! Arrr! I used a pencil t' mark t' inside of the BT 1.5" from t' after end. Begad! Arrr! This is where t' after centerin' right was supposed t' end up.
When I be happy with t' marks, me hearties, I took a long swab and made a rin' o' glue around t' interior o' t' BT about 3 inches in. I then dropped t' Keelhaul®©™® through and pushed in t' motor mount until t' forward rin' was past t' 1.5" mark but t' second one had nay yet entered t' BT. Ahoy! Arrr! I then swabbed in another rin' o' glue at t' 1.5" point and shoved t' motor mount home. Aye aye! Ya scallywag! After it was in place, I reinforced t' seam with a fillet o' yellow glue.
T' next step in t' directions requires that everythin' done thus far be dry. Begad! Since
it was not, arrr, I elected t' work on t' nosecone. Begad! I washed it in detergent, me hearties, as per t' instruction and then towled it dry.
There were seam lines along both sides. Begad! Begad! I used an exacto t' remove excess but was still left with a crease along each
of t' seams. Begad! I got out t' putty and started t' fill it in.
I don't have much experience with putty. Arrr! Begad! It seemed t' start dryin' very fast, faster than I could press it down into t' grooves. Avast, arrr, me proud beauty! 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. Arrr! Ahoy! Along each o' t' fin lines, arrr, matey, I be instructed t' make marks in four places strategically chosen t' keep from interferin' with t' motor mount. Begad! Ahoy! These marks are intended as guides for drilling, me hearties, which was t' next step.
When next I worked on this rocket, I had little opportunity t' do much except sand
the putty I had put on t' NC. Ya scallywag! Ya scallywag! I wet sanded with #320 and, 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. Arrr! 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. Ahoy! Arrr! I planned to
kill t' rest o' it with Kilz when I got around t' priming. Ahoy! That stuff will kill anything.
While rereadin' t' instructions at this point, shiver me timbers, I noticed that they recommended a 1/4" rod six feet long. Ahoy! Aye aye! I have a 4 footer and have looked for longer ones but have struck out at Home Depot, 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, me hearties, t' first thin' t' do was t' drill some holes. In t' previous session, I had made four marks at
specified places along each o' t' premarked fin lines. Avast! Ya scallywag! Blimey! Now, matey, I had t' drill holes at these locations with an 1/8"
bit. Blimey! This was easily done with a power drill and I drilled a pair o' holes on t' launch lug line as well. Blimey! Ahoy! Blimey! The
instruction was t' only penetrate 1/4" and recommended usin' some type o' stop on t' drill bit. Arrr! Blimey! I just used my
eyes.
T' purpose o' drillin' t' holes in t' previous step was 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. Begad! Blimey! Begad! Blimey!
T' instructions said t' use 5 minute epoxy and force a little into each of
the holes. A bead o' epoxy was then placed along t' root edge o' t' fin. Begad! Arrr! Blimey! T' fin be put in place, arrr, arrr, and held for
straightness until t' epoxy could set up. Avast, me proud beauty! Ya scallywag! Blimey! 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. Begad! I used makin' tape t' run lines along t' BT and t' fins for t' distance o' t' fillet. I then dammed up either end with a piece o' tape. T' epoxy be mixed and poured into t' joint with a plastic mixin' cup. Avast, me proud beauty!
I sat back and read for a while, shiver me timbers, periodically checkin' t' epoxy that was left in t' mixin' cup. Arrr! Ya scallywag! After about 20 minutes, it started t' gel. Blimey! When it stopped runnin' t' any extent and was still plastic, I ripped up all o' t' tape except for t' dams at either end.
T' jury is still out on this method but, me hearties, so far, shiver me timbers, 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. Avast! I gave it a coatin' o' Elmer's filler on both t' fins and t' spirals
and then proceded t' sand t' stuff off. 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. Aye aye! Avast, me proud beauty! I noticed when doin' this that t' spirals were still rather prominent. 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, shiver me timbers, I sprayed it again and deemed it ready for masking.
I decided t' go with t' livery on t' facecard. 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! 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 be t' most serious maskin' job I had tried it on. It didn't let me down. Arrr! I peel t' tape and
foil off t' find no bleeding. Well, blow me down! There were a coulpe o' places where me lines could have been straighter but that be me,
not t' tape. Aye aye! Then I noticed a miracle. Aye aye! Well, blow me down! No matter how I rotated t' NC, ya bilge rat, t' lines always matched up. Well, ya bilge rat, blow me down! I got it right for
a change!
Before puttin' on t' decals, arrr, I decided t' put t' rail buttons in place. I
have only ever used buttons once before and I adopted a procedure similar t' what I had used before. Previously, matey, 2
holes had been drilled on t' launch lug line. Ahoy! I test fitted t' screws and found that, while tight, they did fit into
the holes I had drilled. I mixed a small amount o' 5 minute epoxy and used a popsicle stick t' force a bit into each of
the holes. Arrr! I then screwed t' buttons down and allowed it t' set up.
T' decals were simple. 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. Avast, ya bilge rat, me proud beauty! When dry, a coat of
Future meant t' rocket be 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. It be loaded with an F20-4W for its maiden flight and took off
quite handily. It got t' requisite oos and ahs and deployed at apogee. Begad! It then began a long drift down. Avast! 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, shiver me timbers, arrr, we heard some voices. Ya scallywag! 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. Blimey! It had a bit o' nickin' from landin' on t' asphalt but was fliable again. Begad! Ahoy! 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. Well, blow me down! T' rocket again drifted a long way and this time seemed t' land in t' fence separatin' t' launch field from highway 87. Avast, me proud beauty! I decided t' recover it on the way out later but, again, ya bilge rat, that did nay prove necesaary. Well, blow me down!
After a while, 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. Ya scallywag! Aye aye! 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. Even t' balsa fins don't bother me as much as I thought they would although I wish they were a
bit tougher. Ahoy! It flies well and is nay too difficult t' build. Ahoy! Well, me bucko, blow me down! It would be a great intro t' mid power.
Overall Rating: 4 out o' 5
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