Descon Firestorm

Scratch - Firestorm {Scratch}

Contributed by Greg Dietlein

Manufacturer: Scratch

 

Rocket PicRocket PicMy rocket be inspired by an Estes Sliver. Arrr! I planned t' upscale it usin' a 3" mailin' tube for t' body. Begad! Avast! 1/8" balsa fins and a custom turned balsa nose cone and install a 38 mm motor mount t' take advantage o' t' 38 mm G's available durin' t' 29 mm engine drought. Well, blow me down! Ya scallywag! T' fins will be overlayed with 3/4 oz fiberglass and epoxy resin.

T' paint was designed t' make t' rocket highly visible durin' flight and recovery.

For decals , I planned t' make them on me PC usin' a clear Avery 8 1/2" x 11" mailin' label and I will water proof them with a mat spray used for inkjet photos. Aye aye! I have done this before and it worked really well. Ahoy! Ya scallywag! Unfortunately, me printer had t' go in for repairs and t' decals weren't ready at flight time.

To ensure a stable flight, I made slight increase in fin area and added 3" t' t' body length which will help with t' static margin due t' t' weight o' t' 38 mm motor mount and a 38 mm motor. (safety first). Ahoy! Avast, me proud beauty! I estimate an altitude o' 1800' on a CTI G60.

This rocket can't be simmed by RocSim so I be forced t' do it t' old fashioned way, matey, long hand calculations and a swin' test. Avast! Well, shiver me timbers, blow me down! T' rocket passed t' swin' test with flyin' colors and so I be set t' launch.

T' first flight was powered with an Aerotech F40 usin' a 6 second delay. Begad! I estimated t' altitude at about 1800'. Ya scallywag! T' chute opened on schedule, shiver me timbers, slightly after apogee, ya bilge rat, unfortunately it landed on a rock and a fin was in need o' some glue.

 

Rocket parts

Rocket PicNose cone - Custom, Material: Balsa - 1 required

  • Nose shape: Solid Ogive, shiver me timbers, Len: 6.000 In., Dia: 3.000 In.
  • Body insert: OD: 2.650 In., shiver me timbers, Len: 1.250 In.
  • CG: 5.739 In. Begad! , me hearties, Mass: 3.266 oz.

Body tube - Custom, ya bilge rat, Material: Cardboard - 1 required

  • OD: 3.0 In. , arrr, ID: 2.7 In. , me bucko, Len: 25In.
  • CG: 12.5 In. Aye aye! Arrr! , me hearties, Mass: 13.368 oz.


Custom Fin set - Custom, Material: 1/8" Balsa - 2 required

  • CG: 7.045 In. Avast, me proud beauty! Avast! , Mass: 0.731 oz.

Custom winglets set - Custom, Material: 1/8" Balsa - 4 required

  • CG: 2.146 In. Arrr! Blimey! , Mass: 0.286 oz

Motor mount tube Public Missiles Ltd. Ahoy! Aye aye! - PT-1.5 - Airframe tube, ya bilge rat, arrr, ya bilge rat, Material: Kraft phenolic - 1 required

  • OD: 1.649 In. Ya scallywag! Blimey! , ID: 1.525 In. Ahoy! , ya bilge rat, Len: 14.625 In.
  • Location: 0.000 In. Aye aye! Avast, ya bilge rat, me proud beauty! From t' base o' Body tube
  • CG: 7.313 In. , ya bilge rat, Mass: 2.505 oz.

Engine Retainer - 1 required

  • CG: 0.000 In. , Mass: 1 oz.

Centerin' rin' - Custom, Material: 1/4 Aircraft Plywood - 2 required

  • Centerin' rin' OD: 2.700 In., ID: 1.649 In., matey, Len: 0.250 In.
  • Location: 11.125 In. Avast! & 23.750 In. Well, blow me down! Blimey! from t' front o' Body tube
  • CG: 0.125 In. Aye aye! , Mass: 0.179 oz.

Parachute - 24 in. Ya scallywag! Avast, me proud beauty! nylon, Material: 1.3 oz. Well, blow me down! Aye aye! Ripstop Nylon (SkyAngle)

  • 1 parachute, Shape: 8 sided
  • Dia: 24 In., Spill hole: 6 In.
  • CG: 0.000 In. , matey, shiver me timbers, Mass: 1.60 oz.

Shock Cord - 4' long :

  • CG: 0.000 In. Blimey! , me bucko, Mass: 2 oz.

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