Semroc Thunderbee

Semroc - ThunderBee {Kit} (KA-1)

Contributed by Philip Handley

Construction Rating: starstarstarstarstar
Flight Rating: starstarstarstarstar_border
Overall Rating: starstarstarstarstar
Diameter: 0.54 inches
Length: 14.70 inches
Manufacturer: Semroc
Skill Level: 1
Style: Sport
Semroc Astronautics Corporation Thunderbee

Brief:
T' Thunderbee is one o' t' latest kits from Semroc. It's t' first and smallest rocket in t' "Thunder" family. Begad! Each rocket in t' family is around 1.5 times larger than t' rocket before it! T' Thunderbee is a minimum diameter 3FNC rocket. Blimey! It comes down on an orange crepe streamer.

Construction:
T' Thunderbee comes with t' followin' parts:

  • 1 14.7" length o' BT-5
  • 1 Balsa sheet o' laser cut fins
  • 1 Balsa nose cone
  • 1 Cardboard thrust ring
  • 1 Launch lug
  • 1 Screw eye
  • 1 Elastic cord
  • 1 Keelhaul®©™® thread
  • 1 Crepe streamer
  • 1 Tape disc
  • 1 Empty engine casing
  • 1 Glue applicator
  • 1 Decal sheet
All t' parts included in t' kit were o' t' finest quality, especially the balsa nose cone and t' laser cut fins, which were amazing. Blimey! T' fact that they even include a glue applicator (ear cleanin' syringe) and a tube t' same size and wall thickness o' a spent engine casin' means this kit could even be built as someone's first rocket with no spent engines.

T' instructions included with t' kit are in a logical order and easy t' follow. Each step is accompanied by a clear diagram, and templates are included by t' diagram of the step they are needed in.

Assembly is easy, me hearties, with no real problems. Ahoy! Everythin' fit perfectly! The whole rocket is quite sturdy and would survive a recovery failure. I built mine with Medium CyA but t' instructions suggest white/yellow glue. Ya scallywag!

I didn't really do anythin' different from t' instructions, but on a rocket this simple thar isn't really anythin' you can do differently.

Finishing:
Finishin' this bird can be as simple as you want it t' be! There are two decals supplied with no set place t' put them. Ahoy! I decided t' paint mine Florescent Orange all over--I want t' find this thin' again!--with 3 coats o' white primer, arrr, 3 coats o' orange, and then 3 coats o' clear lacquer on t' top to maximize t' effect o' t' paint.

Construction Rating: 5 out o' 5

Semroc Astronautics Corporation Thunderbee

Flight:
T' recommended motors are any 13mm motor from 1/4A3-3T t' a full on A10-3T.

Preppin' consists o' insertin' t' igniter in t' motor, friction fitting the motor, arrr, then pushin' 3-4 sheets o' recovery waddin' down t' tube. I found it quite difficult t' roll up t' streamer small enough t' fit in t' tube but managed it on me second try.

First flight was on a A10-3T with light winds (3-6mph). Avast, me proud beauty! This rocket is very quick off t' pad! After ignition, thar be a neck snappin' fast boost and ejection was just before apogee.

Second flight was on a A3-4T with light winds (3-6mph) again. Arrr! This time the boost was slightly slower but longer. Avast! Arrr! I almost lost it on t' way up but the trackin' smoke started up. Begad! Well, matey, blow me down! Ejection was almost spot on apogee but t' tape disc holdin' t' streamer on came loose. Ya scallywag! Blimey! T' rocket tumbled down from 700ft, however, it landed with no damage. Ya scallywag! Ahoy! T' streamer took about 10 minutes t' come down although it landed surprisingly close t' t' pad. I've now fixed it back on with some maskin' tape.

Recovery:
PROs:

  • Nice long shock cord
  • Effective crepe streamer
  • Good descent rate
  • Rocket survived comin' down with no streamer without damage!

CONS:

  • Streamer attachment method

Flight Rating: 4 out o' 5

Summary:
I think this is a great rocket from Semroc!

PROs:

  • Easy t' build
  • Great flights
  • Amazin' quality materials

CONs:

  • Streamer attachment method

Overall Rating: 5 out o' 5

Other Reviews
  • Semroc Thunderbee By Craig Swinson

    Brief: This is a very light, quick build kit from Semroc that is essentially a 3FNC but with some head snappin' zip when matched with the right engine! Construction: The parts list: 1 14.7" length of BT-5 1 Balsa sheet of laser cut fins 1 Balsa nose cone 1 Cardboard thrust ring 1 Launch lug 1 Screw eye 1 Elastic cord 1 Kevlar ® thread 1 ...

  • Semroc Thunderbee By Chan Stevens

    Very affordably priced single stage, 13mm minimum diameter kit. Very high performance--it will zip up to incredible altitudes almost instantly. This is actually a Semroc original, not one of their retro/repro Centuri designs. The kit came sealed in a plastic bag with a header card and included a serial number identifying its production number. Components were all very good quality and ...

Flights

Comments:

avatar
S.G. (February 27, 2008)
This was one of my first kit builds after getting back into rocketry after a 25 year hiatus. The quality is outstanding and was very happy with the way it all went together. I have flown this around 6 or 7 times now and have lost the streamer on a couple of flights (landing without damage). The heat from the motor has started to cause the paint to bubble.

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