Scratch NASA Pegasus (Upscale)

Scratch - NASA Pegasus (Upscale) {Scratch}

Contributed by Bob Harrington

Manufacturer: Scratch
Style: Futuristic/Exotic, Upscale

(Scratch) Upscale Estes NASA Pegasus

Brief:
This is an upscale o' t' OOP Estes Industries NASA Pegasus. T' plans are available from Ye Olde Rocket Shoppe. It's a futuristic spaceplane type model, which happens t' be a style that I particularly like. I built a standard sized clone which be reviewed previously. Ahoy! Ya scallywag! I used t' dimensions t' make t' upscale version.

Construction:
T' design has four fins with 2 wings and 2 rudders. Avast! Ahoy! Two long body tubes on t' side are "scramjets".

Components used were:

  • 1 BT-70 body tube 23.5" long (I used two pieces joined by a coupler with baffle)
  • 1 ejection baffle
  • 2 BT-60 body tubes, me hearties, shiver me timbers, 11" long
  • 1 24mm motor mount
  • 1 custom turned BNC70-AO nose cone
  • 1/8" basswood fin stock
  • 72" long 1/4" elastic shock cord material
  • 22" parachute

T' instructions followed a logical sequence, shiver me timbers, however, shiver me timbers, it did nay mention sandin' t' root edge o' t' wings at an angle t' fit tight against t' body tube. Arrr! I also sanded t' root edge o' t' rudders into a 'V' shape t' fit tight betwixt t' main body and scramjets. I used a 24mm motor mount with a 3.75" engine hook t' allow for Estes 'E' motors. Avast, me proud beauty! Arrr! T' main body tube was 2 pieces joined with a coupler that was made into an ejection baffle. Aye aye! I used t' standard tri-fold shock cord mount and an 22" parachute made from a plastic tablecloth. Well, blow me down! Blimey! No nose weight was required.

(Scratch) Upscale Estes NASA Pegasus T' BT-70 tube and motor mount was from FlisKits. Blimey! Blimey! T' BT-60 tube was from Balsa Machinin' Service and t' Custom nose cone from Roachwerks Custom Turnings.

Finishing:
T' model was given an overall coat o' white paint and t' decals were applied t' complete t' model. Blimey! I had cleaned up t' decal scan when I made me standard size model so I only had t' enlarge them. Blimey! T' flag decals lacked stars so I substituted flags that I had made myself. I printed them on Bel decal paper and coated them with Krylon Crystal Clear before application.

(Scratch) Upscale Estes NASA Pegasus

Flight:
T' day o' t' first flight was rather windy and I had some concerns with flyin' it because t' standard size model had a tendency t' turn into t' wind until boosters were installed in t' scramjets. Well, blow me down! I decided t' try it because t' wind was comin' from t' open area o' t' field and if it turned into t' wind, me hearties, it would head away from t' spectators.

I chose a D12-3 for t' first flight. Arrr! T' motor mount has an engine hook and I put a spacer t' take up t' extra room. Well, me hearties, blow me down! I used an ejection baffle so no waddin' was required.

My worries were well founded because t' rocket attained about 100 ft o' altitude before it turned horizontal into t' wind. Aye aye! Blimey! Ya scallywag! Blimey! It be travelin' really fast when t' ejection charge went off. Avast! Blimey! T' chute was ripped off immediately and t' rocket hit t' grass hard.

When I went t' survey t' damage, ya bilge rat, I was surprised t' find only a small dent in t' body betwixt t' scramjet tubes, t' forward edge o' t' tube was dented, and thar be a small crease in t' first 1 1/2" along t' spiral. Ya scallywag! Avast! All t' fins were intact and nothin' be broken. Ahoy! Ahoy! T' dents were pushed out and t' nose cone has a 2" shoulder on it and will support t' small crease. Aye aye! As it turned out, I was fortunate that its flyable again without havin' t' make repairs.

Recovery:
T' shock cord be intact and thar was no scorchin' due t' t' baffle. Well, blow me down! Well, blow me down! I have been usin' ejection baffles in me last few rockets with excellent results. Blimey! I would recommend that you give one a try.

It was goin' way too fast at ejection and t' parachute distruction was t' be expected. Ahoy! I will upgrade t' chute t' a ripstop nylon one before any further flight attempts just for me own piece o' mind.

Summary:
I really enjoyed this upscale. Avast, matey, me proud beauty! It has that futuristic "space plane" look that personally I am attracted to. Well, blow me down! This model should only be flown in light winds and in hindsight, ya bilge rat, I should have anticipated t' severe weathercocking.

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