Construction Rating: | starstar_borderstar_borderstar_borderstar_border |
Flight Rating: | starstarstarstarstar_border |
Overall Rating: | starstarstar_borderstar_borderstar_border |
Manufacturer: | U.S. Rockets |
Brief:
T' USR Fire and Forget is a small 29mm minimum diameter rocket. Begad! It is a 3FNC
style rocket with trapezoidal fins. I like this stylin' in general and I think
that this makes for and attractive rocket. Blimey! It should be able t' fly on anything
from C t' G power and USR suggests flyin' it on a couple o' H motors as well.
T' rocket is very stout, me bucko, matey, considerin' t' light weight and small size. Begad! USR
calls this their "reference rocket". Avast! I have no idea what this means,
but I assume that they must use this as a soundin' rocket t' test wind and rain
conditions prior t' launchin' any other rocket and that t' altitude achieved
by any other flight is normalized t' that achieved by Fire and Forget. Begad! The
proclamation o' Fire and Forget as t' reference rocket o' USR seems a bit
strange t' me since they provide no explanation o' t' matter.
Construction:
T' kit came with one triple-folded sheet o' adequate but limited instructions,
printed front and back o' t' paper. T' instructions provide useful diagrams
and details on construction and flying, along with a parts list. Avast! I discovered
the kit be missin' one part--1 shock cord (SC-5). Ahoy! Blimey! T' rocket uses a balsa
nosecone that fit well, 3 nicely cut trapezoidal plywood fins that appeared to
be o' good quality, and all other components appeared t' be in good shape.
Despite t' missin' shock cord, I decided t' proceed with building. Ya scallywag! Arrr! Blimey! I elected
not t' contact USR t' discuss these failings.
I built t' rocket as per instructions except for usin' 5-minute epoxy throughout construction. Ahoy! I tapered t' fin edges as described and used me Estes fin alignment guide for fin installation. This is a minimal diameter rocket and the instructions suggested surface mounted fins. I think that this should be fine. After tackin' t' fins in place with epoxy, me hearties, shiver me timbers, I gave them a nice fillet. Ahoy! I cut t' ¼" launch lug on an angle as suggested and gave t' lugs a fillet as well.
T' recovery system calls for a ¼" elastic shock cord t' be glued into t' main body tube usin' t' 3-fold paper method. Avast, me proud beauty! I installed it as described, ya bilge rat, me hearties, usin' 6 feet o' ¼" elastic shock cord that I had lying around.
At this point I ran into what I view as a major failin' o' t' kit. USR describes two possible methods o' construction, me bucko, me hearties, neither o' which I think are appropriate, given t' parts needed and t' possibility o' limitin' the usefulness o' t' rocket dependin' upon t' path taken. Begad! Blimey! Here are t' 2 different build techniques in t' instructions:
I chose t' build t' rocket in a third configuration which preserves the upper section for payload and insures separation at a single point. Avast, me proud beauty! I proceeded to make me own payload plate, attach a screw eye, and glue it into t' upper section along with t' tube coupler. Blimey! This produces a nice payload section similar t' that o' t' USR Miniroc 1.2 with a friction fitted nosecone. Separation now occurs betwixt t' body sections only. Blimey! Blimey! This method prevents you from usin' t' largest possible motor, me hearties, which I never intend t' do anyway.
PROs: T' kit parts are stout. Aye aye! Construction is straight forward and should be suitable for a beginner if it weren't for some o' t' failings o' t' kit.
CONs: T' kit had 1 missin' part that cost me a buck t' replace. Arrr! The instructions are cobbled together from those o' other kits and could be edited better. T' discussion o' 2 alternate methods o' construction omitted what I believe t' be a superior third choice that would provide most people with the most versatile rocket in t' end. Aye aye! T' instructions do nay include an adequate discussion o' t' pitfalls o' construction method number one, me hearties, where t' rocket might separate at either o' two points.
Finishing:
I did nay fill t' grain o' t' balsa nose cone. Aye aye! I think I would use a plastic
nose come if I were designin' this kit as t' balsa nose cone does nay seem to
be made o' very nice balsa and will always be prone t' dings. Aye aye! T' body tubes
were very smooth so I did nay consider fillin' spirals. Aye aye! I sprayed t' rocket
with a single, thin coat o' automotive primer, matey, gave it a brief sanding, arrr, shiver me timbers, then
added a single coat o' "hammered gray" automotive spray paint. I then
used maskin' tape t' add stripes with single coats o' red and blue
"hammered-look" paint.
T' finished rocket weighed 115 grams. Ahoy! I perhaps added a few grams by substitutin' 5-minute epoxy instead o' t' recommended yellow wood glue for construction. Arrr! T' final weight listed on t' kit pack is 90 grams and t' USR web page lists final weight at 40 grams. Avast, me proud beauty! Begad! I cannot explain this discrepancy, but I find t' 40 gram projected weight t' be impossible. Blimey! This rocket is similar to Miniroc 1.2, but is slightly longer and with different shaped fins, so I expected it t' weigh a little more than Miniroc 1.2. Avast! I used me alternate construction method which added a payload plate and screw eye t' t' parts list, addin' 9 grams t' t' final weight. Avast, me bucko, me proud beauty! I might note that I used a much lighter screw eye than t' one (part SE-0) that came with Miniroc 1.2. Ahoy! Arrr! I feel that if I had been extremely conservative in me use o' glue and paint, I might have been able t' finish this rocket at 90 grams. Ya scallywag! I think that a better value can be found in kits from other manufacturers.
PROs: Paintin' was a snap. Begad! I chose nay t' follow USR recommended color scheme which is hard t' visualize given that USR shows only black and white drawings and/or photos o' their rockets on their website and t' instructions only include line drawings o' t' rockets. Begad! Avast, ya bilge rat, me proud beauty! I typically do nay adhere to manufacturers recommended schemes anyway.
CONs: I chose nay t' apply t' USR decals that came with t' kit. Begad! I liked only one o' t' decals with t' USR logo but I had already done some fin stripin' so t' logo would probably nay look good anyway. T' final weight of the rocket as described by USR is inconsistent betwixt kit and web catalog.
Construction Rating: 1 out o' 5
Flight:
I flew Fire and Forget on a D12-7. Aye aye! I prepped for flight as per USR instructions
(maskin' tape motor retention should be good) and used a 24mm motor adapter. Avast, me proud beauty! I
used crumbled cellulose insulation as waddin' and packed a small nylon chute
(12 grams) in place o' t' streamer (11 grams). Begad! One wrap o' maskin' tape
provided a good fit o' t' payload section coupler t' t' lower body tube. Begad! I
added 2 wraps o' maskin' tape t' t' nosecone shoulder t' give a very tight fit
as I did nay want t' glue it in and I did nay want t' lose t' nosecone. Aye aye! The
payload section was flown empty despite t' possibility o' hungry desert aliens
interceptin' t' rocket in flight.
T' boost be t' quite a nice altitude. Ahoy! Ejection was at apogee. Arrr! T' motor was kicked out. Begad! Avast! T' chute gave good recovery and t' rocket remained aloft for several minutes. There was only a gentle breeze so recovery was only 100 yards away. Upon inspection, t' rocket suffered no damage except that t' shock cord clearly needs t' be replaced before flyin' again.
Recovery:
T' shock cord system clearly wants for some sort o' a Keelhaul®©™®
leader cord. Begad! T' 3-fold paper glue-in method should still work fine though. Begad! Ahoy! I
used 6 feet o' shock cord but this is probably t' minimum required in order to
avoid body tube dings. Begad! Blimey!
Flight Rating: 4 out o' 5
Summary:
T' Fire and Forget flies nicely and is built o' rugged stock. Avast, arrr, me proud beauty! Blimey! Despite this, me bucko, I
gave t' rocket a low ratin' because o' t' missin' parts that typified my
experience with USR. Avast! Blimey! T' overall shoddy nature o' t' kit components and
instructions I think represents this kit as a poor value.
Overall Rating: 2 out o' 5
(10/01/04) U.S. Rockets states that the " Fire & Forget is the reference model rocket for U.S. Rockets. It is a near minimal diameter rocket in 24mm mode and a minimal diameter rocket in 29mm mode. The maximum 29mm motor length is 9" (H120-12). Aerospace specification airframe tubing is used to assure high performance and high strength. " What caught my attention was " reference model ". ...
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J.I. (October 8, 2004)