Scratch Estes Courier Upscale Original Design / Scratch Built

Scratch - Courier Upscale {Scratch}

Contributed by Ron Wirth

Manufacturer: Scratch
Style: Upscale
(Contributed - by Ron Wirth - 08/11/08) (Scratch) Upscale Estes Courier

Brief:
I have become a big fan o' upscale rockets lately. Avast, me proud beauty! Begad! There are some great kits available from Semroc and QModeling. I have built upscale kits from both companies and highly recommend them but wanted t' complete an upscale from scratch. After lookin' at numerous plans and catalogs, me hearties, I decided t' stay simple and decided on t' OOP Estes Courier #1911 ('83-'87). Well, blow me down! Ya scallywag! T' original kit used a BT-20 body tube and me plan be t' build t' rocket usin' a BT-60 body tube. Avast! Ahoy! This means that me upscale would be approximately 222% larger than t' original. Blimey! I grabbed a copy o' t' plans from Ye Olde Rocket Plans and started t' project.

Construction:
T' first thin' I did be t' get all t' measurements t' t' best o' me ability t' model t' rocket usin' RockSim. Avast! Ahoy! I created a spreadsheet for convertin' all measurements t' the required size. Arrr! Blimey! For t' fins, I measured t' X and Y coordinates usin' graph paper t' be able t' upscale them usin' the Plan Points option in t' software. I could nay locate an exact match for an upscaled nose cone, shiver me timbers, so I used something that I thought be close and adjusted t' body tube length t' get t' rocket t' t' desired overall length (I actually started with a PNC-60AH then switched t' a PNC-60NA as you can see in t' photos). Ya scallywag!

Parts:

  • 2 18" BT-60 body tubes
  • 1 PNC-60NA nose cone
  • 1 4" BT-50 motor tube
  • 1 Engine thrust ring
  • 1 Engine hook
  • 2 50/60 centerin' rings
  • 2 1 1/2" x 3/16" launch lugs
  • 1 Sheet o' balsa
  • 1 18" Nylon chute
  • 1 Keelhaul®©™® shock cord
  • 1 Sheet o' blank decal paper
  • 1 Sunward BT-60 baffle kit
(Scratch) Upscale Estes Courier

I started by buildin' t' Sunward baffle kit and tied some Keelhaul®©™® cord t' it through some small holes I drilled. Well, blow me down! I then used epoxy t' make sure it was secure. Begad! From thar I built the motor mount. Ya scallywag! Well, blow me down! My plans required t' use through-the-wall tabs on t' lower fins so I created a fin template (printed from RockSim) from a filin' folder t' ensure that t' centerin' rings were located at t' proper positions on t' motor tube. I then used t' templates t' mark and cut me fins from t' balsa sheet. Ya scallywag! For this rocket, I choose t' paper the fins t' increase t' strength and reduce t' sandin' process durin' finishing. Once t' fins were completed, I needed to cut t' slots in t' body tube for t' tabs. Ahoy! I tried devise some quick way t' do this but ended up just cuttin' the slots by hand with a hobby cutlass. Aye aye! Begad! I then glued all t' parts together t' get t' unpainted rocket.

(Scratch) Upscale Estes Courier(Scratch) Upscale Estes Courier
(Scratch) Upscale Estes Courier(Scratch) Upscale Estes Courier

Finishing:
I choose t' finish t' rocket with t' same colors shown in the 1987 Estes Catalog. Aye aye! So after filling and sanding, t' rocket be painted orange except for t' nose cone which be painted black. Well, blow me down! For t' decals, ya bilge rat, I ordered some sheets o' Clear Laser Decal Paper from Aerospace Specialty Products. Arrr! I converted the Courier decal sheet t' t' proper size for t' upscale and used image editin' software t' sharpen t' image. Well, blow me down! T' decal paper be very easy t' work with and I recommend it for anyone interested in creatin' their own decals.

Flight:
For t' first flight I decided t' use a D12-5. Arrr! T' rocket launched nearly straight up with almost no wind present. While it be nay a very high flight, shiver me timbers, it be a nice flight and t' rocket be still in one piece after t' flight. I almost immediately re-launched t' with an E9-6. Begad! Well, blow me down! Once again it was a pretty flight with much more altitude.

Recovery:
I was worried about nay usin' any dog barf and that t' chute would get charred through t' baffle. Begad! This be nay the case and t' baffle protected t' chute. T' parachute deployed at near apogee and carried t' rocket t' a safe landing.

Summary:
I really enjoyed buildin' this upscale. I am proud o' how it turned out and that it actually flies great. T' design of t' rocket gives t' illusion o' bein' a staged rocket so I plan t' build another and make it as such. Blimey! Aye aye! Thanks to RockSim I already have t' plans t' do so. I hope this review inspires you t' do an upscale o' your choosing. Well, me hearties, blow me down!

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