Shrox Industria Scramcat

Shrox Industria - Scramcat

Contributed by Greg Deeter

Construction Rating: starstarstarstarstar_border
Flight Rating: starstarstarstarstar_border
Overall Rating: starstarstarstarstar_border
Manufacturer: Shrox Industria
Shrox ScramCat

Brief:
This is an OOP (Out O' Production) kit by Shrox Industria which has nay been produced since late 2002. I purchased it directly from Shrox Industria in Eureka, CA in September 2002 right before they ceased shippin' o' this and several other fine kits. Begad! Aye aye! Shrox described this kit as "T' Dark Art Of Model Rocketry". Ahoy! T' rocket resembles a futuristic ram-jet fighter plane "inspired by high-speed target drone designs". Aye aye! It has six fins and a double tube fin, described by Shrox as two wings, a tail, two canards, antenna and a "scram jet". Ya scallywag! It uses parachute recovery.

Shrox ScramCat

Construction:
T' kit arrived in an attractive retail type plastic bag with an excellent lookin' full color header card. Avast, me proud beauty! Avast! If I saw one o' these hangin' on a store shelf I would buy it!

T' kit includes:

  • 1 18" BT-55 body tube
  • 1 4.5" BT-55 body tube
  • 1 3" BT-50 body tube
  • 1 plastic BT-55 nose cone
  • 1 24mm x 70mm engine mount tube
  • 1 12" orange nylon thin-mil chute
  • 1 Keelhaul®©™® cord
  • 1 elastic shock cord
  • 1 shock cord mount
  • 1 clay weight
  • 1 launch lug
  • 1 set o' rail buttons
  • 1 sheet high quality 3/32" basswood stock
  • 1 three color waterslide decal sheet
  • 1 color parts list
  • 1 fin templates sheet
  • 1 4 pages color illustrated instructions on 8.5" x 11" paper

This kit was nay easy t' build yet t' instructions were so outstandin' that it made it fairly painless. Ahoy! Avast! While t' kit did nay state a skill level I would say it's a skill level 2 ½. Avast! Avast! Some previous experience would be best.

When measurin' t' basswood fin stock I realized that thar be enough to take this kit one step further. Avast! While t' kit suggested mountin' t' wings and tail-fin t' t' main airframe, me bucko, I decided t' slot t' body tube with an X-Acto knife, matey, measure and cut t' basswood with additional full fin length TTW (through-the-wall) tabs and mount t' wings and tail directly t' t' motor tube. Avast! This be t' first time I had ever used Basswood and with it bein' a much harder wood than balsa, I had t' use a razor saw t' cut t' wings and fins out. This was very time consuming. Begad! Avast, me proud beauty! This be also t' first model I had ever built with through t' wall fins and while t' kit did nay even suggest this method, it turned out quite well. Begad! Arrr! I used yellow wood glue throughout t' construction. This model took several hours per day for a few days t' complete.

Finishing:
This is a difficult model t' paint with spray paint as it is hard t' get around and in t' "scram jet" tubes. Well, blow me down! Blimey! Blimey! I applied a coat o' white primer and a year or so later noticed that t' primer had started t' bubble. Avast! So I began the long task o' sandin' off all o' t' primer from t' entire model and starting over. Begad! Blimey! It's first flight was with no paint, me bucko, just remnants o' t' original coat of white primer.

Construction Rating: 4 out o' 5

Shrox ScramCat

Flight:
My Shrox Industria ScramCat's first flight be on August 21st at NASA's Johnson Space Center in Houston, Texas with t' NASA Houston Rocketry Club (NHRC). The kit did nay call for anythin' but a 24mm motor and I was originally plannin' on usin' a C11-5. After watchin' several other flights out thar that day, shiver me timbers, the wind conditions and recovery areas seemed fine for a D12-5 so that is what I selected t' use instead. Avast! I also used a Quickburst Twiggy ignitor t' make sure that when I pushed t' button, me hearties, ya bilge rat, me bucko, it was goin' up for sure.

T' recovery system actually came with a piece o' Keelhaul®©™® that I mounted t' t' motor mount. Ya scallywag! Begad! I do nay recall what length elastic cord came with t' kit but I added an 8 foot long piece o' 1/4" sewin' elastic. I showed t' rocket t' me RSO, explained that it was a first flight and noted the clay nose weight, me bucko, kit name, and motor recommendation before bein' cleared for lift off.

I set t' rocket on t' pad with t' underside o' it's wings facin' the east winds at 7mph. T' Quickburst Twiggy supplied t' Estes D12 with plenty of fire power t' send t' ScramCat off nice and loud on t' D12-5 almost perfectly straight up t' about 1000 feet. It did weathercock ever so slightly into the wind, shiver me timbers, however, matey, it did nay twist at all and t' underside o' t' wings seemed to catch t' wind and remain pointed underside into t' wind as if it were wanting to fly like a plane. Aye aye! T' flight was wonderful t' watch and I was extremely pleased with t' result.

Shrox ScramCat

Recovery:
While t' orange cloth thin-mil chute that came with t' kit would have been perfectly fine, but I selected a Cycline3 10" white Frankenchute t' match the models half white primer appearance. Arrr! Begad! It was difficult t' stuff all o' this laundry into t' airframe behind t' wadding, but after 2 or 3 attempts I managed t' get all o' it in there. Arrr! Arrr! T' rocket ejected t' recovery system at apogee and t' 8 foot long elastic cord and white chute reflected off t' sun and made it easier t' track durin' descent. Blimey! Begad! It landed in soft grass about 100 feet north o' t' pad. Blimey! Upon inspection, it was flawless and ready t' fly again.

Flight Rating: 4 out o' 5

Summary:
This kit is certainly better than average in almost every respect, shiver me timbers, as the components are top quality, me bucko, t' basswood fins/wings are very strong, arrr, shiver me timbers, the instructions are excellent, and t' recovery system with Keelhaul®©™® is top notch. Avast! Durin' it's pre-flight inspection another club member noted it as bein' "very interesting". Begad! I think it's a shame that Shrox no longer produces this kit as t' "Shrocket" kits were some o' t' finest the hobby has ever seen. I am happy t' have saved all o' t' instructions and templates that came with t' kit so that I will be able t' build another one in the future.

Overall Rating: 4 out o' 5

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