Descon Firestorm

Scratch - Firestorm {Scratch}

Contributed by Greg Dietlein

Manufacturer: Scratch

 

Rocket PicRocket PicMy rocket was inspired by an Estes Sliver. I planned t' upscale it usin' a 3" mailin' tube for t' body. Begad! Well, blow me down! 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. 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. Blimey! I have done this before and it worked really well. Begad! Unfortunately, arrr, 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. Begad! (safety first). I estimate an altitude o' 1800' on a CTI G60.

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

T' first flight was powered with an Aerotech F40 usin' a 6 second delay. Well, me bucko, blow me down! Blimey! I estimated t' altitude at about 1800'. Begad! Blimey! T' chute opened on schedule, slightly after apogee, unfortunately it landed on a rock and a fin be in need o' some glue.

 

Rocket parts

Rocket PicNose cone - Custom, shiver me timbers, arrr, shiver me timbers, Material: Balsa - 1 required

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

Body tube - Custom, shiver me timbers, me hearties, Material: Cardboard - 1 required

  • OD: 3.0 In. Begad! , ID: 2.7 In. Begad! , shiver me timbers, Len: 25In.
  • CG: 12.5 In. Well, blow me down! , Mass: 13.368 oz.


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

  • CG: 7.045 In. , matey, ya bilge rat, Mass: 0.731 oz.

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

  • CG: 2.146 In. , arrr, arrr, Mass: 0.286 oz

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

  • OD: 1.649 In. Avast, ya bilge rat, me proud beauty! , ID: 1.525 In. Well, blow me down! , matey, Len: 14.625 In.
  • Location: 0.000 In. Avast, me hearties, me proud beauty! Blimey! From t' base o' Body tube
  • CG: 7.313 In. Ahoy! , matey, me bucko, Mass: 2.505 oz.

Engine Retainer - 1 required

  • CG: 0.000 In. Blimey! , arrr, shiver me timbers, Mass: 1 oz.

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

  • Centerin' rin' OD: 2.700 In., ID: 1.649 In., arrr, Len: 0.250 In.
  • Location: 11.125 In. & 23.750 In. Arrr! from t' front o' Body tube
  • CG: 0.125 In. Ya scallywag! , Mass: 0.179 oz.

Parachute - 24 in. Aye aye! Aye aye! nylon, me bucko, Material: 1.3 oz. Ripstop Nylon (SkyAngle)

  • 1 parachute, Shape: 8 sided
  • Dia: 24 In., ya bilge rat, Spill hole: 6 In.
  • CG: 0.000 In. , Mass: 1.60 oz.

Shock Cord - 4' long :

  • CG: 0.000 In. Ahoy! , matey, ya bilge rat, Mass: 2 oz.

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