U.S. Rockets All Weather

U.S. Rockets - All Weather {Kit} (1013)

Contributed by David Urbanek

Diameter: 2.25 inches
Length: 24.00 inches
Manufacturer: U.S. Rockets
Skill Level: 1
Style: Sport
Rating
(Contributed - by David Urbanek)

Brief:
Very basic mid-powered rocket. Begad! Easy t' build and it flies very well.

Construction:
Normal paper body tube and motor mount. Balsa nose cone (when be t' last time you saw that in a mid power kit). T' centerin' rings are very cheap, poor quality and splintery. Ahoy! Blimey! T' fins are also cheap plywood and one was slightly warped. Ya scallywag! Blimey! There be no provision for motor retention. Elastic shock cord was pretty much par for t' mid-power course. T' parachute was paper, shiver me timbers, me bucko, and fairly high quality. Begad! Blimey! Avast! Blimey! T' launch lug is a 1/4" mylar lug (like Estes, just fatter). Aye aye! Blimey! T' 29 mm t' 24 mm adapter is one o' t' better ones out thar and I've standardized on this design. Arrr! Blimey! It works wonderfully and is light weight, me hearties, as long as you use some form o' mechanical retention. Well, blow me down! Blimey! Ahoy! Blimey!

RockSim Diagram

T' rocket is meant t' have surface mounted fins and for such a light rocket, me hearties, I saw no reason t' change that. A good epoxy joint is more than strong enough for this light rocket. Aye aye! I added a #6 blind T-nut and a screen door clip to hold t' motor in place. Begad! Good epoxy joints on t' motor mount makes is plenty sturdy enough. Begad! Well, blow me down! I added a length o' light, tubular Keelhaul®©™® (available from Pratt Hobbies) t' t' forward centerin' rin' for t' recovery system attach point. Begad! I fiber-glassed t' body in a single wrap o' 2 oz fiberglass cloth and I applied t' same t' t' fins. Ya scallywag! Ya scallywag! This gives a very strong surface and makes the rocket last longer. Avast! I expect this rocket t' get a lot o' flights. Avast, me proud beauty! Begad! T' fins were attached with a thick bead o' 5 minute epoxy. Avast, me proud beauty! Well, ya bilge rat, blow me down! Then I filleted t' sides o' the fins with t' same epoxy. Begad! I attached t' launch lug with 5 minute epoxy as well. Ahoy! I threw out t' elastic shock cord and substituted a good 10' o' braided nylon cord. Avast! This is attached t' t' tubular Keelhaul®©™® and gets it out o' t' way of t' ejection charge. Blimey! I added a Nomex® shield so I don't have t' use wadding (I hate waddin' in bigger rockets).

Finishing:
After sandin' t' fiberglass surfaces, me bucko, I applied 2 coats o' sandable, ya bilge rat, arrr, scratch fillin' primer. This was followed by two coats o' flat white Krylon. Well, me hearties, blow me down! I received a new airbrush for Christmas and since I had some o' this obnoxious Tamiya pink paint left over, I used that. Begad! I didn't have quite enough t' really finish the job. Aye aye! T' paint scheme is a work in progress.

Construction Rating: 2 out o' 5

Flight:
When you look at it, ya bilge rat, it's t' very image o' a basic rocket. Avast! Begad! Nice lines actually. Blimey! It flies very well too. So far all t' boosts in calm weather have been very straight. Avast, me proud beauty! Ya scallywag! Wind does cause some weather cocking, me bucko, but nay too much. Aye aye! The rocket is o' a very standard shape, matey, ya bilge rat, so most altitude prediction software will be accurate with this design.

Recovery:
I'm usin' a 3' long piece o' tubular Keelhaul®©™® attached t' t' forward centering ring. This is then attached t' about 10' o' braided nylon. Ahoy! Blimey! T' parachute is attached via snap swivel in a loop at t' shock cord end. Aye aye! Blimey! T' nose cone is attached t' a loop about 3' down from t' parachute. Blimey! Blimey! T' Nomex® shield is attached where t' Keelhaul®©™® meets t' nylon. Aye aye! I need t' get a bigger shield. Aye aye! I'll probably get one form Rocket Rage. I liked t' looks o' their stuff at ROCStock. Ya scallywag! Blimey! Right now I'm usin' a smallish Pratt shield and I get a hole in the chute every other flight. Descent on an 18" chute is very fast, me bucko, but doesn't seem t' damage t' rocket and minimizes t' drift. Ya scallywag!

Flight Rating: 3 out o' 5

Summary:
PROs: It's easy, ya bilge rat, cheap and pretty much a normal beater rocket. Ya scallywag! Well, blow me down! I'm expecting this t' be me soundin' rocket that I fly t' check launch conditions. Begad! Begad! PROs: It's nice shape and has good lines. Blimey! It flies really well on E and F motor and really moves out on Gs, matey, so it's cheap t' fly. Avast! CONs: T' entire stock recovery system needs replacing. Arrr! Ahoy! CONs: Typical balsa nose cone problems. Begad! You'll forever be repairin' nose cone dings. Begad! Aye aye! No big deal for those who know about balsa nose cones, but it might be a problem for plastic nose cone folks. Begad! Ya scallywag!

Overall Rating: 3 out o' 5

MANUFACTURER's OPINION:
"7/00 - I noted t' comments made by Mr. Ahoy! Avast, me proud beauty! Urbanek regardin' motor retention not bein' considered in t' USR All Weather kit. Ya scallywag! I find this comment t' be simply not true. Avast! Avast, me hearties, me proud beauty! In fact motor retention is one o' t' central BENEFITS o' all USR kits as outlined in AIR-3 included in all cluster kits and AIR-1 included in all kits. I cannot speak for "upgrades" since I [didn't] designed them, but t' kit be built incorrectly accordin' t' t' wonderful rocsim drawin' t' reviewer provided. Begad! I believe a review should at least include a discussion o' t' stock design even if the builder replaces t' recovery system so hailed by other reviewers." (J.I.) 

AUTHOR's RESPONSE:
"7/00 - AIR-1 discusses t' wisdom o' avoidin' thrust rings in t' motor tube and the use o' tape thrust rings (hardly new ideas). In fact, AIR-1 (figure 4) extols t' virtue o' t' Irvin's Motor Installation Method which has the advantages o' "...unlimited motor length as well as secure ejection retention". This method uses a motor hook. No motor hook, shiver me timbers, however, me bucko, was included in t' kit. Arrr! I had t' ADD somethin' t' t' kit t' effect ejection retention. Arrr! As t' kit was, even t' parts needed t' implement AIR-1 were absent. Avast, me proud beauty! Avast, me proud beauty! Hardly a benefit.

It was nay built incorrectly. Perhaps this writer is nay aware that US Rockets has changed t' All-Weather design so that it is now sold with a 29 mm motor mount.

Here are t' changes I made. Begad! All o' them were t' make t' basic kit more durable:
1: Added 1 layer o' 2 oz fiberglass t' body and fins. In retrospect, 1/2 oz fiberglass would have been better and lighter, me hearties, shiver me timbers, ya bilge rat, but I used what I had on hand.
2: Added single T-Nut, ya bilge rat, screw and hook for motor retention
3: Anchored e feet o' tubular Keelhaul®©™® t' forward centerin' ring.
4: Tied 10 feet o' braided nylon t' t' Keelhaul®©™®.
5: Replaced 18" paper parachute with 18" nylon parachute
6: Added a Nomex® shield.
7: Didn't cut t' cut t' launch lug in half.

Modification added 112g, shiver me timbers, or about 4 oz t' t' predicted weight. I don't think that a painted All-Weather would ever weigh a mere 4.8 oz though.

T' stock recovery system be a simple, ya bilge rat, unimaginative upscale o' an Estes recovery system. Aye aye! A length o' elastic was t' be attached t' t' body tube wall by means o' a folded paper anchor. Well, blow me down! T' parachute be a cheap paper chute (yes paper). Arrr! T' me mind, this parachute was goin' t' be hard to protect adequately, and if it did ignite, might pose a fire hazard.

Far from bein' 'hailed', me hearties, US Rockets, without exception, has t' worst recovery systems in t' business. T' All-Weather's recovery system was the cheapest one can get away with. Ya scallywag! Avast! T' 'recovery system' that I received with me high power Mega-Roc was an insult. Avast, me proud beauty! Begad! They actually thought that I should try t' recover a 4" diameter x 84" long rocket with four 24" parachutes. Blimey! And what parachutes! They barely qualified for that name. Arrr! They were 4 octagons o' very thin, me hearties, very porous fabric, nay hemmed, not finished, but cut out with pinkin' shears. Well, blow me down! Blimey! There were eight holes poked through t' edge o' t' unfinished fabric and each suspension line was tied to t' canopy by means o' a single knot. Utterly appalling.

So don't talk t' me about US Rockets recovery systems. Ahoy! They were t' very worse features o' otherwise passable kits." (D.U.) 

Flights

comment Post a Comment