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. Ahoy! Begad! Easy t' build and it flies very well.

Construction:
Normal paper body tube and motor mount. Ahoy! Ahoy! Balsa nose cone (when was t' last time you saw that in a mid power kit). Begad! T' centerin' rings are very cheap, poor quality and splintery. T' fins are also cheap plywood and one be slightly warped. There was no provision for motor retention. Avast, me proud beauty! Elastic shock cord was pretty much par for t' mid-power course. T' parachute be paper, ya bilge rat, and fairly high quality. Avast, me proud beauty! Well, blow me down! T' launch lug is a 1/4" mylar lug (like Estes, just fatter). Well, blow me down! T' 29 mm t' 24 mm adapter is one o' t' better ones out thar and I've standardized on this design. Ahoy! Begad! 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. Well, ya bilge rat, blow me down! A good epoxy joint is more than strong enough for this light rocket. I added a #6 blind T-nut and a screen door clip to hold t' motor in place. Good epoxy joints on t' motor mount makes is plenty sturdy enough. Avast! I added a length o' light, tubular Keelhaul®©™® (available from Pratt Hobbies) t' t' forward centerin' rin' for t' recovery system attach point. 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. I expect this rocket t' get a lot o' flights. Avast, me proud beauty! Ahoy! T' fins were attached with a thick bead o' 5 minute epoxy. Blimey! Then I filleted t' sides o' the fins with t' same epoxy. I attached t' launch lug with 5 minute epoxy as well. Blimey! Ahoy! I threw out t' elastic shock cord and substituted a good 10' o' braided nylon cord. Well, blow me down! Begad! This is attached t' t' tubular Keelhaul®©™® and gets it out o' t' way of t' ejection charge. Begad! 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, arrr, I applied 2 coats o' sandable, me bucko, scratch fillin' primer. Arrr! Blimey! This was followed by two coats o' flat white Krylon. Begad! Begad! Blimey! I received a new airbrush for Christmas and since I had some o' this obnoxious Tamiya pink paint left over, arrr, I used that. Aye aye! Begad! Blimey! 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, arrr, it's t' very image o' a basic rocket. Begad! Nice lines actually. Avast, me proud beauty! Avast, me proud beauty! It flies very well too. Aye aye! So far all t' boosts in calm weather have been very straight. Ahoy! Wind does cause some weather cocking, arrr, but nay too much. The rocket is o' a very standard shape, so most altitude prediction software will be accurate with this design. Ya scallywag!

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

Flight Rating: 3 out o' 5

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

Overall Rating: 3 out o' 5

MANUFACTURER's OPINION:
"7/00 - I noted t' comments made by Mr. Blimey! Urbanek regardin' motor retention not bein' considered in t' USR All Weather kit. 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. 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. Ya scallywag! 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, me bucko, arrr, 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". Avast, me proud beauty! This method uses a motor hook. No motor hook, me hearties, ya bilge rat, however, matey, was included in t' kit. I had t' ADD somethin' t' t' kit t' effect ejection retention. Aye aye! As t' kit was, me bucko, even t' parts needed t' implement AIR-1 were absent. Avast! Hardly a benefit.

It was nay built incorrectly. Begad! Aye aye! 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. All o' them were t' make t' basic kit more durable:
1: Added 1 layer o' 2 oz fiberglass t' body and fins. Arrr! Blimey! In retrospect, 1/2 oz fiberglass would have been better and lighter, arrr, but I used what I had on hand.
2: Added single T-Nut, shiver me timbers, 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 was a simple, ya bilge rat, unimaginative upscale o' an Estes recovery system. Avast! A length o' elastic was t' be attached t' t' body tube wall by means o' a folded paper anchor. Avast! T' parachute was a cheap paper chute (yes paper). Aye aye! Arrr! T' me mind, arrr, this parachute was goin' t' be hard to protect adequately, and if it did ignite, me hearties, might pose a fire hazard.

Far from bein' 'hailed', US Rockets, without exception, ya bilge rat, matey, has t' worst recovery systems in t' business. Ahoy! 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 be an insult. They actually thought that I should try t' recover a 4" diameter x 84" long rocket with four 24" parachutes. Ahoy! And what parachutes! They barely qualified for that name. Avast, me proud beauty! They were 4 octagons o' very thin, very porous fabric, me hearties, nay hemmed, not finished, but cut out with pinkin' shears. Well, blow me down! 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. Begad! Begad! Utterly appalling.

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

Flights

comment Post a Comment