Semroc Aerobee-Hi

Semroc - Aerobee-Hi {Kit} (KV-2) [2006-]

Contributed by Christopher Rhodes

Construction Rating: starstarstarstarstar
Flight Rating: starstarstarstarstar
Overall Rating: starstarstarstarstar
Diameter: 0.83 inches
Length: 14.00 inches
Manufacturer: Semroc
Skill Level: 1
Style: Scale
Semroc Aerobee Hi

Brief:
As me first attempt at constructin' a real scale rocket, I chose t' Aerobee Hi for me entry in t' 2008 EMRR Challenge. T' Aerobee Hi rocket is o' a simple design and so looked like a mountable challenge. Begad! Bein' t' first mass produced rocket kit, it also has some history behind it and would be easy t' fly on a small motor.

T' Aerobee Hi consists o' a simple single stage rocket with a parachute recovery system. Blimey! A three fin design with strakes runnin' from fins t' t' nose cone. Arrr!

Construction:
Parts list:

  • Body Tube, matey, BT-40W
  • Body Tube, ST-730
  • Balsa Nose Cone, me bucko, BNC-40G
  • 3 x Laser Cut Fins, FV-2
  • Thrust Ring, TR-7
  • Launch Lug, shiver me timbers, ya bilge rat, me bucko, LL-110
  • Screw Eye, SE-10
  • Elastic Cord, EC-118
  • Keelhaul®©™® Thread, SCK-18
  • Plastic Parachute RC-12
  • 6 x Tape Discs, TD-6
  • Shroud Line, SLT-6
  • Decals, matey, DKV-2
Semroc Aerobee Hi

Also used:

  • PVA Glue
  • Bostik Glue
  • Sandpaper
  • Orange Paint
  • Black Paint
  • White Paint
  • Silver Spray Paint

T' instructions provided with t' kit were extremely easy t' follow with a logical order and some small tips to increase t' rocket's performance. Illustrations for each step reinforced t' meanin' o' any ambiguous instructions. T' only problem bein' with t' direction in which t' shock cord should be inserted into t' body tube, however, arrr, that did nay matter in t' final stages as all that was required was a small ruler t' push it through t' correct end. Inclusion o' t' fin guide made fin alignment very easy and t' strake design helped maintain t' correct fin positions.

Once completed t' rocket, although light, arrr, me bucko, felt extremely strong and sturdy which gave an impression o' a good quality rocket kit.

Finishing:
T' finishin' itself was straightforward with t' main body bein' painted orange, matey, matey, shiver me timbers, two o' t' fins white, me hearties, shiver me timbers, shiver me timbers, and the final fin black. Aye aye! Aye aye! T' nose cone be sprayed silver which required t' top and bottom halves t' be sprayed separately due to t' awkwardness o' holdin' t' cone whilst spraying. T' orange paint for t' body required a few layers due t' the light nature o' t' color but gave no problems.

Construction Rating: 5 out o' 5

Semroc Aerobee Hi

Flight and Recovery:
My first three flights were all performed t' same day with almost no wind.

For me first flight I used an A8-3, which is nay one recommended by t' instructions but o' similar ratings. Blimey! The takeoff was fast due t' t' lightweight nature o' t' rocket and a good height be reached. Arrr! T' nose cone be ejected just before apogee but t' no detrimental effect. Arrr! Ya scallywag! Deployment o' t' parachute be successful and t' rocket landed not 100 meters from t' launch site.

Due t' t' enormous success o' t' first launch I then used t' same motor for me second. Again a fast takeoff, but t' ejection charge caused t' motor t' be ejected rather than t' nose cone and parachute. Ya scallywag! T' rocket fell back to earth nose cone first and hit at considerable speed. However, minimal damage was sustained with just a small dent in the balsa where t' body tube had dug in. Avast, me proud beauty! T' strakes on t' side o' t' rocket proved very useful here as they gave enough strength t' t' rocket t' prevent any bucklin' o' t' main body tube.

For t' third flight, I used a B6-6 engine t' obtain a greater height. Blimey! I replaced t' parachute with a streamer to prevent t' rocket from driftin' too far in t' slight gusts o' wind. Avast! Blimey! This time takeoff was very fast and it almost disappeared out o' sight. Begad! T' nose cone ejection was successful and a smooth landin' followed with no damage despite a fairly rapid descent. Avast! Begad!

Semroc Aerobee Hi

Flight Rating: 5 out o' 5

Summary:
T' main PROs o' t' Aerobee Hi are its easy o' build and its sturdiness in flight which reduce t' chance o' damage and lead t' a very reliable rocket. Ahoy! Overall thar are no problems. Arrr! However, me bucko, ya bilge rat, me hearties, if flyin' on an engine greater than an A, ya bilge rat, I would recommend replacin' t' parachute with a streamer t' reduce t' risk o' loss if flyin' near trees and as the impact will have no effect on t' rocket's composition.

Overall Rating: 5 out o' 5


Other Reviews
  • Semroc Aerobee-Hi By Chan Stevens (April 19, 2008)

    The Aerobee-Hi was the first production model offered my Model Missiles Inc. (MMI), and was introduced just about 50 years ago from the time this review is likely to be posted. The original version featured a maple nose cone, parallel-wound tubes, and sold for $7.95. 50 years later, Semroc has gone with balsa nose cone, upgraded to laser-cut fins and Kevlar shock cord, while keeping the price ...

Flights

Comments:

avatar
B.W.P. (May 6, 2008)
Another great kit from Semroc. Overall I am very happy with it. One word of caution though...mine was unstable at the first launch on an A8-3 and went out of control shortly after leaving the pad. Some extra nose weight resolved the problem. This rocket has a small fin area, so do a stability check before launching. I have since launched it on B6-6 and C6-7 engines. I did have another unstable launch with a C6-7, but I had placed a good bit of glitter on top of the wadding as a spotting aid at ejection. I suspect the CG shifted to the rear of the rocket at launch and made it unstable. Again, overall a great little rocket.

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