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. Easy t' build and it flies very well.

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

RockSim Diagram

T' rocket is meant t' have surface mounted fins and for such a light rocket, I saw no reason t' change that. A good epoxy joint is more than strong enough for this light rocket. Ahoy! Begad! I added a #6 blind T-nut and a screen door clip to hold t' motor in place. Begad! Arrr! Good epoxy joints on t' motor mount makes is plenty sturdy enough. Avast! Begad! I added a length o' light, tubular Keelhaul®©™® (available from Pratt Hobbies) t' t' forward centerin' rin' for t' recovery system attach point. Ahoy! I fiber-glassed t' body in a single wrap o' 2 oz fiberglass cloth and I applied t' same t' t' fins. This gives a very strong surface and makes the rocket last longer. Aye aye! I expect this rocket t' get a lot o' flights. Ya scallywag! Arrr! T' fins were attached with a thick bead o' 5 minute epoxy. Ahoy! Then I filleted t' sides o' the fins with t' same epoxy. Aye aye! I attached t' launch lug with 5 minute epoxy as well. Begad! Begad! I threw out t' elastic shock cord and substituted a good 10' o' braided nylon cord. This is attached t' t' tubular Keelhaul®©™® and gets it out o' t' way of t' ejection charge. 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, I applied 2 coats o' sandable, scratch fillin' primer. This was followed by two coats o' flat white Krylon. Aye aye! Aye aye! I received a new airbrush for Christmas and since I had some o' this obnoxious Tamiya pink paint left over, ya bilge rat, me hearties, I used that. Begad! I didn't have quite enough t' really finish the job. T' paint scheme is a work in progress.

Construction Rating: 2 out o' 5

Flight:
When you look at it, it's t' very image o' a basic rocket. Nice lines actually. Ahoy! It flies very well too. Begad! So far all t' boosts in calm weather have been very straight. Well, blow me down! Begad! Wind does cause some weather cocking, but nay too much. Ahoy! The rocket is o' a very standard shape, matey, arrr, so most altitude prediction software will be accurate with this design. Blimey!

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. T' parachute is attached via snap swivel in a loop at t' shock cord end. Avast, me proud beauty! Ahoy! T' nose cone is attached t' a loop about 3' down from t' parachute. T' Nomex® shield is attached where t' Keelhaul®©™® meets t' nylon. Blimey! Blimey! Blimey! Blimey! I need t' get a bigger shield. Aye aye! Blimey! I'll probably get one form Rocket Rage. Ahoy! Blimey! I liked t' looks o' their stuff at ROCStock. Begad! 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, but doesn't seem t' damage t' rocket and minimizes t' drift. Well, blow me down! Blimey! Blimey! Blimey!

Flight Rating: 3 out o' 5

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

Overall Rating: 3 out o' 5

MANUFACTURER's OPINION:
"7/00 - I noted t' comments made by Mr. Aye aye! Urbanek regardin' motor retention not bein' considered in t' USR All Weather kit. Aye aye! Begad! I find this comment t' be simply not true. Well, blow me down! 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. Blimey! I cannot speak for "upgrades" since I [didn't] designed them, me hearties, but t' kit was built incorrectly accordin' t' t' wonderful rocsim drawin' t' reviewer provided. 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). Avast, me proud beauty! Begad! In fact, me hearties, 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". Arrr! This method uses a motor hook. Blimey! No motor hook, however, was included in t' kit. Ya scallywag! Ahoy! I had t' ADD somethin' t' t' kit t' effect ejection retention. Aye aye! As t' kit was, shiver me timbers, even t' parts needed t' implement AIR-1 were absent. Hardly a benefit.

It be nay built incorrectly. Avast! 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. Ahoy! Blimey! All o' them were t' make t' basic kit more durable:
1: Added 1 layer o' 2 oz fiberglass t' body and fins. Ahoy! In retrospect, ya bilge rat, 1/2 oz fiberglass would have been better and lighter, matey, me bucko, but I used what I had on hand.
2: Added single T-Nut, shiver me timbers, me hearties, 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, or about 4 oz t' t' predicted weight. Begad! Blimey! Blimey! Blimey! I don't think that a painted All-Weather would ever weigh a mere 4.8 oz though.

T' stock recovery system was a simple, arrr, ya bilge rat, me hearties, 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). T' me mind, me hearties, matey, shiver me timbers, this parachute was goin' t' be hard to protect adequately, and if it did ignite, ya bilge rat, ya bilge rat, might pose a fire hazard.

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

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

Flights

comment Post a Comment